making act segmenter

1 files changed, 3095 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/utils.c b/ffmpeg/libavcodec/utils.c
new file mode 100644
index 0000000..c15b772
--- /dev/null
+++ b/ffmpeg/libavcodec/utils.c
@@ -0,0 +1,3095 @@
+/*
+ * utils for libavcodec
+ * Copyright (c) 2001 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * utils.
+ */
+
+#include "config.h"
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/crc.h"
+#include "libavutil/frame.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/samplefmt.h"
+#include "libavutil/dict.h"
+#include "libavutil/avassert.h"
+#include "avcodec.h"
+#include "dsputil.h"
+#include "libavutil/opt.h"
+#include "thread.h"
+#include "frame_thread_encoder.h"
+#include "internal.h"
+#include "bytestream.h"
+#include "version.h"
+#include <stdlib.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <float.h>
+#if CONFIG_ICONV
+# include <iconv.h>
+#endif
+
+volatile int ff_avcodec_locked;
+static int volatile entangled_thread_counter = 0;
+static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
+static void *codec_mutex;
+static void *avformat_mutex;
+
+void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
+{
+    if (min_size < *size)
+        return ptr;
+
+    min_size = FFMAX(17 * min_size / 16 + 32, min_size);
+
+    ptr = av_realloc(ptr, min_size);
+    /* we could set this to the unmodified min_size but this is safer
+     * if the user lost the ptr and uses NULL now
+     */
+    if (!ptr)
+        min_size = 0;
+
+    *size = min_size;
+
+    return ptr;
+}
+
+static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
+{
+    void **p = ptr;
+    if (min_size < *size)
+        return 0;
+    min_size = FFMAX(17 * min_size / 16 + 32, min_size);
+    av_free(*p);
+    *p = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
+    if (!*p)
+        min_size = 0;
+    *size = min_size;
+    return 1;
+}
+
+void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
+{
+    ff_fast_malloc(ptr, size, min_size, 0);
+}
+
+void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
+{
+    uint8_t **p = ptr;
+    if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
+        av_freep(p);
+        *size = 0;
+        return;
+    }
+    if (!ff_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE, 1))
+        memset(*p + min_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+}
+
+void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
+{
+    uint8_t **p = ptr;
+    if (min_size > SIZE_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
+        av_freep(p);
+        *size = 0;
+        return;
+    }
+    if (!ff_fast_malloc(p, size, min_size + FF_INPUT_BUFFER_PADDING_SIZE, 1))
+        memset(*p, 0, min_size + FF_INPUT_BUFFER_PADDING_SIZE);
+}
+
+/* encoder management */
+static AVCodec *first_avcodec = NULL;
+
+AVCodec *av_codec_next(const AVCodec *c)
+{
+    if (c)
+        return c->next;
+    else
+        return first_avcodec;
+}
+
+static void avcodec_init(void)
+{
+    static int initialized = 0;
+
+    if (initialized != 0)
+        return;
+    initialized = 1;
+
+    if (CONFIG_DSPUTIL)
+        ff_dsputil_static_init();
+}
+
+int av_codec_is_encoder(const AVCodec *codec)
+{
+    return codec && (codec->encode_sub || codec->encode2);
+}
+
+int av_codec_is_decoder(const AVCodec *codec)
+{
+    return codec && codec->decode;
+}
+
+void avcodec_register(AVCodec *codec)
+{
+    AVCodec **p;
+    avcodec_init();
+    p = &first_avcodec;
+    while (*p != NULL)
+        p = &(*p)->next;
+    *p          = codec;
+    codec->next = NULL;
+
+    if (codec->init_static_data)
+        codec->init_static_data(codec);
+}
+
+unsigned avcodec_get_edge_width(void)
+{
+    return EDGE_WIDTH;
+}
+
+void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
+{
+    s->coded_width  = width;
+    s->coded_height = height;
+    s->width        = -((-width ) >> s->lowres);
+    s->height       = -((-height) >> s->lowres);
+}
+
+#if (ARCH_ARM && HAVE_NEON) || ARCH_PPC || HAVE_MMX
+#   define STRIDE_ALIGN 16
+#else
+#   define STRIDE_ALIGN 8
+#endif
+
+void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
+                               int linesize_align[AV_NUM_DATA_POINTERS])
+{
+    int i;
+    int w_align = 1;
+    int h_align = 1;
+
+    switch (s->pix_fmt) {
+    case AV_PIX_FMT_YUV420P:
+    case AV_PIX_FMT_YUYV422:
+    case AV_PIX_FMT_UYVY422:
+    case AV_PIX_FMT_YUV422P:
+    case AV_PIX_FMT_YUV440P:
+    case AV_PIX_FMT_YUV444P:
+    case AV_PIX_FMT_GBRP:
+    case AV_PIX_FMT_GRAY8:
+    case AV_PIX_FMT_GRAY16BE:
+    case AV_PIX_FMT_GRAY16LE:
+    case AV_PIX_FMT_YUVJ420P:
+    case AV_PIX_FMT_YUVJ422P:
+    case AV_PIX_FMT_YUVJ440P:
+    case AV_PIX_FMT_YUVJ444P:
+    case AV_PIX_FMT_YUVA420P:
+    case AV_PIX_FMT_YUVA422P:
+    case AV_PIX_FMT_YUVA444P:
+    case AV_PIX_FMT_YUV420P9LE:
+    case AV_PIX_FMT_YUV420P9BE:
+    case AV_PIX_FMT_YUV420P10LE:
+    case AV_PIX_FMT_YUV420P10BE:
+    case AV_PIX_FMT_YUV420P12LE:
+    case AV_PIX_FMT_YUV420P12BE:
+    case AV_PIX_FMT_YUV420P14LE:
+    case AV_PIX_FMT_YUV420P14BE:
+    case AV_PIX_FMT_YUV422P9LE:
+    case AV_PIX_FMT_YUV422P9BE:
+    case AV_PIX_FMT_YUV422P10LE:
+    case AV_PIX_FMT_YUV422P10BE:
+    case AV_PIX_FMT_YUV422P12LE:
+    case AV_PIX_FMT_YUV422P12BE:
+    case AV_PIX_FMT_YUV422P14LE:
+    case AV_PIX_FMT_YUV422P14BE:
+    case AV_PIX_FMT_YUV444P9LE:
+    case AV_PIX_FMT_YUV444P9BE:
+    case AV_PIX_FMT_YUV444P10LE:
+    case AV_PIX_FMT_YUV444P10BE:
+    case AV_PIX_FMT_YUV444P12LE:
+    case AV_PIX_FMT_YUV444P12BE:
+    case AV_PIX_FMT_YUV444P14LE:
+    case AV_PIX_FMT_YUV444P14BE:
+    case AV_PIX_FMT_GBRP9LE:
+    case AV_PIX_FMT_GBRP9BE:
+    case AV_PIX_FMT_GBRP10LE:
+    case AV_PIX_FMT_GBRP10BE:
+    case AV_PIX_FMT_GBRP12LE:
+    case AV_PIX_FMT_GBRP12BE:
+    case AV_PIX_FMT_GBRP14LE:
+    case AV_PIX_FMT_GBRP14BE:
+        w_align = 16; //FIXME assume 16 pixel per macroblock
+        h_align = 16 * 2; // interlaced needs 2 macroblocks height
+        break;
+    case AV_PIX_FMT_YUV411P:
+    case AV_PIX_FMT_UYYVYY411:
+        w_align = 32;
+        h_align = 8;
+        break;
+    case AV_PIX_FMT_YUV410P:
+        if (s->codec_id == AV_CODEC_ID_SVQ1) {
+            w_align = 64;
+            h_align = 64;
+        }
+        break;
+    case AV_PIX_FMT_RGB555:
+        if (s->codec_id == AV_CODEC_ID_RPZA) {
+            w_align = 4;
+            h_align = 4;
+        }
+        break;
+    case AV_PIX_FMT_PAL8:
+    case AV_PIX_FMT_BGR8:
+    case AV_PIX_FMT_RGB8:
+        if (s->codec_id == AV_CODEC_ID_SMC ||
+            s->codec_id == AV_CODEC_ID_CINEPAK) {
+            w_align = 4;
+            h_align = 4;
+        }
+        break;
+    case AV_PIX_FMT_BGR24:
+        if ((s->codec_id == AV_CODEC_ID_MSZH) ||
+            (s->codec_id == AV_CODEC_ID_ZLIB)) {
+            w_align = 4;
+            h_align = 4;
+        }
+        break;
+    case AV_PIX_FMT_RGB24:
+        if (s->codec_id == AV_CODEC_ID_CINEPAK) {
+            w_align = 4;
+            h_align = 4;
+        }
+        break;
+    default:
+        w_align = 1;
+        h_align = 1;
+        break;
+    }
+
+    if (s->codec_id == AV_CODEC_ID_IFF_ILBM || s->codec_id == AV_CODEC_ID_IFF_BYTERUN1) {
+        w_align = FFMAX(w_align, 8);
+    }
+
+    *width  = FFALIGN(*width, w_align);
+    *height = FFALIGN(*height, h_align);
+    if (s->codec_id == AV_CODEC_ID_H264 || s->lowres)
+        // some of the optimized chroma MC reads one line too much
+        // which is also done in mpeg decoders with lowres > 0
+        *height += 2;
+
+    for (i = 0; i < 4; i++)
+        linesize_align[i] = STRIDE_ALIGN;
+}
+
+void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
+    int chroma_shift = desc->log2_chroma_w;
+    int linesize_align[AV_NUM_DATA_POINTERS];
+    int align;
+
+    avcodec_align_dimensions2(s, width, height, linesize_align);
+    align               = FFMAX(linesize_align[0], linesize_align[3]);
+    linesize_align[1] <<= chroma_shift;
+    linesize_align[2] <<= chroma_shift;
+    align               = FFMAX3(align, linesize_align[1], linesize_align[2]);
+    *width              = FFALIGN(*width, align);
+}
+
+int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
+                             enum AVSampleFormat sample_fmt, const uint8_t *buf,
+                             int buf_size, int align)
+{
+    int ch, planar, needed_size, ret = 0;
+
+    needed_size = av_samples_get_buffer_size(NULL, nb_channels,
+                                             frame->nb_samples, sample_fmt,
+                                             align);
+    if (buf_size < needed_size)
+        return AVERROR(EINVAL);
+
+    planar = av_sample_fmt_is_planar(sample_fmt);
+    if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
+        if (!(frame->extended_data = av_mallocz(nb_channels *
+                                                sizeof(*frame->extended_data))))
+            return AVERROR(ENOMEM);
+    } else {
+        frame->extended_data = frame->data;
+    }
+
+    if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
+                                      (uint8_t *)(intptr_t)buf, nb_channels, frame->nb_samples,
+                                      sample_fmt, align)) < 0) {
+        if (frame->extended_data != frame->data)
+            av_freep(&frame->extended_data);
+        return ret;
+    }
+    if (frame->extended_data != frame->data) {
+        for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
+            frame->data[ch] = frame->extended_data[ch];
+    }
+
+    return ret;
+}
+
+static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame)
+{
+    FramePool *pool = avctx->internal->pool;
+    int i, ret;
+
+    switch (avctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO: {
+        AVPicture picture;
+        int size[4] = { 0 };
+        int w = frame->width;
+        int h = frame->height;
+        int tmpsize, unaligned;
+
+        if (pool->format == frame->format &&
+            pool->width == frame->width && pool->height == frame->height)
+            return 0;
+
+        avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align);
+
+        if (!(avctx->flags & CODEC_FLAG_EMU_EDGE)) {
+            w += EDGE_WIDTH * 2;
+            h += EDGE_WIDTH * 2;
+        }
+
+        do {
+            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
+            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
+            av_image_fill_linesizes(picture.linesize, avctx->pix_fmt, w);
+            // increase alignment of w for next try (rhs gives the lowest bit set in w)
+            w += w & ~(w - 1);
+
+            unaligned = 0;
+            for (i = 0; i < 4; i++)
+                unaligned |= picture.linesize[i] % pool->stride_align[i];
+        } while (unaligned);
+
+        tmpsize = av_image_fill_pointers(picture.data, avctx->pix_fmt, h,
+                                         NULL, picture.linesize);
+        if (tmpsize < 0)
+            return -1;
+
+        for (i = 0; i < 3 && picture.data[i + 1]; i++)
+            size[i] = picture.data[i + 1] - picture.data[i];
+        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
+
+        for (i = 0; i < 4; i++) {
+            av_buffer_pool_uninit(&pool->pools[i]);
+            pool->linesize[i] = picture.linesize[i];
+            if (size[i]) {
+                pool->pools[i] = av_buffer_pool_init(size[i] + 16, NULL);
+                if (!pool->pools[i]) {
+                    ret = AVERROR(ENOMEM);
+                    goto fail;
+                }
+            }
+        }
+        pool->format = frame->format;
+        pool->width  = frame->width;
+        pool->height = frame->height;
+
+        break;
+        }
+    case AVMEDIA_TYPE_AUDIO: {
+        int ch     = av_frame_get_channels(frame); //av_get_channel_layout_nb_channels(frame->channel_layout);
+        int planar = av_sample_fmt_is_planar(frame->format);
+        int planes = planar ? ch : 1;
+
+        if (pool->format == frame->format && pool->planes == planes &&
+            pool->channels == ch && frame->nb_samples == pool->samples)
+            return 0;
+
+        av_buffer_pool_uninit(&pool->pools[0]);
+        ret = av_samples_get_buffer_size(&pool->linesize[0], ch,
+                                         frame->nb_samples, frame->format, 0);
+        if (ret < 0)
+            goto fail;
+
+        pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL);
+        if (!pool->pools[0]) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+
+        pool->format     = frame->format;
+        pool->planes     = planes;
+        pool->channels   = ch;
+        pool->samples = frame->nb_samples;
+        break;
+        }
+    default: av_assert0(0);
+    }
+    return 0;
+fail:
+    for (i = 0; i < 4; i++)
+        av_buffer_pool_uninit(&pool->pools[i]);
+    pool->format = -1;
+    pool->planes = pool->channels = pool->samples = 0;
+    pool->width  = pool->height = 0;
+    return ret;
+}
+
+static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
+{
+    FramePool *pool = avctx->internal->pool;
+    int planes = pool->planes;
+    int i;
+
+    frame->linesize[0] = pool->linesize[0];
+
+    if (planes > AV_NUM_DATA_POINTERS) {
+        frame->extended_data = av_mallocz(planes * sizeof(*frame->extended_data));
+        frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
+        frame->extended_buf  = av_mallocz(frame->nb_extended_buf *
+                                          sizeof(*frame->extended_buf));
+        if (!frame->extended_data || !frame->extended_buf) {
+            av_freep(&frame->extended_data);
+            av_freep(&frame->extended_buf);
+            return AVERROR(ENOMEM);
+        }
+    } else {
+        frame->extended_data = frame->data;
+        av_assert0(frame->nb_extended_buf == 0);
+    }
+
+    for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
+        frame->buf[i] = av_buffer_pool_get(pool->pools[0]);
+        if (!frame->buf[i])
+            goto fail;
+        frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
+    }
+    for (i = 0; i < frame->nb_extended_buf; i++) {
+        frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]);
+        if (!frame->extended_buf[i])
+            goto fail;
+        frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
+    }
+
+    if (avctx->debug & FF_DEBUG_BUFFERS)
+        av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame);
+
+    return 0;
+fail:
+    av_frame_unref(frame);
+    return AVERROR(ENOMEM);
+}
+
+static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
+{
+    FramePool *pool = s->internal->pool;
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
+    int pixel_size = desc->comp[0].step_minus1 + 1;
+    int h_chroma_shift, v_chroma_shift;
+    int i;
+
+    if (pic->data[0] != NULL) {
+        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
+        return -1;
+    }
+
+    memset(pic->data, 0, sizeof(pic->data));
+    pic->extended_data = pic->data;
+
+    av_pix_fmt_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
+
+    for (i = 0; i < 4 && pool->pools[i]; i++) {
+        const int h_shift = i == 0 ? 0 : h_chroma_shift;
+        const int v_shift = i == 0 ? 0 : v_chroma_shift;
+
+        pic->linesize[i] = pool->linesize[i];
+
+        pic->buf[i] = av_buffer_pool_get(pool->pools[i]);
+        if (!pic->buf[i])
+            goto fail;
+
+        // no edge if EDGE EMU or not planar YUV
+        if ((s->flags & CODEC_FLAG_EMU_EDGE) || !pool->pools[2])
+            pic->data[i] = pic->buf[i]->data;
+        else {
+            pic->data[i] = pic->buf[i]->data +
+                FFALIGN((pic->linesize[i] * EDGE_WIDTH >> v_shift) +
+                        (pixel_size * EDGE_WIDTH >> h_shift), pool->stride_align[i]);
+        }
+    }
+    for (; i < AV_NUM_DATA_POINTERS; i++) {
+        pic->data[i] = NULL;
+        pic->linesize[i] = 0;
+    }
+    if (pic->data[1] && !pic->data[2])
+        avpriv_set_systematic_pal2((uint32_t *)pic->data[1], s->pix_fmt);
+
+    if (s->debug & FF_DEBUG_BUFFERS)
+        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic);
+
+    return 0;
+fail:
+    av_frame_unref(pic);
+    return AVERROR(ENOMEM);
+}
+
+void avpriv_color_frame(AVFrame *frame, const int c[4])
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
+    int p, y, x;
+
+    av_assert0(desc->flags & PIX_FMT_PLANAR);
+
+    for (p = 0; p<desc->nb_components; p++) {
+        uint8_t *dst = frame->data[p];
+        int is_chroma = p == 1 || p == 2;
+        int bytes = -((-frame->width) >> (is_chroma ? desc->log2_chroma_w : 0));
+        for (y = 0; y<-((-frame->height) >> (is_chroma ? desc->log2_chroma_h : 0)); y++){
+            if (desc->comp[0].depth_minus1 >= 8) {
+                for (x = 0; x<bytes; x++)
+                    ((uint16_t*)dst)[x] = c[p];
+            }else
+                memset(dst, c[p], bytes);
+            dst += frame->linesize[p];
+        }
+    }
+}
+
+int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags)
+{
+    int ret;
+
+    if ((ret = update_frame_pool(avctx, frame)) < 0)
+        return ret;
+
+#if FF_API_GET_BUFFER
+    frame->type = FF_BUFFER_TYPE_INTERNAL;
+#endif
+
+    switch (avctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+        return video_get_buffer(avctx, frame);
+    case AVMEDIA_TYPE_AUDIO:
+        return audio_get_buffer(avctx, frame);
+    default:
+        return -1;
+    }
+}
+
+int ff_init_buffer_info(AVCodecContext *avctx, AVFrame *frame)
+{
+    if (avctx->pkt) {
+        frame->pkt_pts = avctx->pkt->pts;
+        av_frame_set_pkt_pos     (frame, avctx->pkt->pos);
+        av_frame_set_pkt_duration(frame, avctx->pkt->duration);
+        av_frame_set_pkt_size    (frame, avctx->pkt->size);
+    } else {
+        frame->pkt_pts = AV_NOPTS_VALUE;
+        av_frame_set_pkt_pos     (frame, -1);
+        av_frame_set_pkt_duration(frame, 0);
+        av_frame_set_pkt_size    (frame, -1);
+    }
+    frame->reordered_opaque = avctx->reordered_opaque;
+
+    switch (avctx->codec->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        if (!frame->width)
+            frame->width               = avctx->width;
+        if (!frame->height)
+            frame->height              = avctx->height;
+        if (frame->format < 0)
+            frame->format              = avctx->pix_fmt;
+        if (!frame->sample_aspect_ratio.num)
+            frame->sample_aspect_ratio = avctx->sample_aspect_ratio;
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        if (!frame->sample_rate)
+            frame->sample_rate    = avctx->sample_rate;
+        if (frame->format < 0)
+            frame->format         = avctx->sample_fmt;
+        if (!frame->channel_layout) {
+            if (avctx->channel_layout) {
+                 if (av_get_channel_layout_nb_channels(avctx->channel_layout) !=
+                     avctx->channels) {
+                     av_log(avctx, AV_LOG_ERROR, "Inconsistent channel "
+                            "configuration.\n");
+                     return AVERROR(EINVAL);
+                 }
+
+                frame->channel_layout = avctx->channel_layout;
+            } else {
+                if (avctx->channels > FF_SANE_NB_CHANNELS) {
+                    av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n",
+                           avctx->channels);
+                    return AVERROR(ENOSYS);
+                }
+
+                frame->channel_layout = av_get_default_channel_layout(avctx->channels);
+            }
+        }
+        av_frame_set_channels(frame, avctx->channels);
+        break;
+    }
+    return 0;
+}
+
+#if FF_API_GET_BUFFER
+int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
+{
+    return avcodec_default_get_buffer2(avctx, frame, 0);
+}
+
+typedef struct CompatReleaseBufPriv {
+    AVCodecContext avctx;
+    AVFrame frame;
+} CompatReleaseBufPriv;
+
+static void compat_free_buffer(void *opaque, uint8_t *data)
+{
+    CompatReleaseBufPriv *priv = opaque;
+    if (priv->avctx.release_buffer)
+        priv->avctx.release_buffer(&priv->avctx, &priv->frame);
+    av_freep(&priv);
+}
+
+static void compat_release_buffer(void *opaque, uint8_t *data)
+{
+    AVBufferRef *buf = opaque;
+    av_buffer_unref(&buf);
+}
+#endif
+
+static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
+{
+    int ret;
+
+    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+        if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0 || avctx->pix_fmt<0) {
+            av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
+            return AVERROR(EINVAL);
+        }
+    }
+    if ((ret = ff_init_buffer_info(avctx, frame)) < 0)
+        return ret;
+
+#if FF_API_GET_BUFFER
+    /*
+     * Wrap an old get_buffer()-allocated buffer in an bunch of AVBuffers.
+     * We wrap each plane in its own AVBuffer. Each of those has a reference to
+     * a dummy AVBuffer as its private data, unreffing it on free.
+     * When all the planes are freed, the dummy buffer's free callback calls
+     * release_buffer().
+     */
+    if (avctx->get_buffer) {
+        CompatReleaseBufPriv *priv = NULL;
+        AVBufferRef *dummy_buf = NULL;
+        int planes, i, ret;
+
+        if (flags & AV_GET_BUFFER_FLAG_REF)
+            frame->reference    = 1;
+
+        ret = avctx->get_buffer(avctx, frame);
+        if (ret < 0)
+            return ret;
+
+        /* return if the buffers are already set up
+         * this would happen e.g. when a custom get_buffer() calls
+         * avcodec_default_get_buffer
+         */
+        if (frame->buf[0])
+            return 0;
+
+        priv = av_mallocz(sizeof(*priv));
+        if (!priv) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+        priv->avctx = *avctx;
+        priv->frame = *frame;
+
+        dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, priv, 0);
+        if (!dummy_buf) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+
+#define WRAP_PLANE(ref_out, data, data_size)                            \
+do {                                                                    \
+    AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf);                  \
+    if (!dummy_ref) {                                                   \
+        ret = AVERROR(ENOMEM);                                          \
+        goto fail;                                                      \
+    }                                                                   \
+    ref_out = av_buffer_create(data, data_size, compat_release_buffer,  \
+                               dummy_ref, 0);                           \
+    if (!ref_out) {                                                     \
+        av_frame_unref(frame);                                          \
+        ret = AVERROR(ENOMEM);                                          \
+        goto fail;                                                      \
+    }                                                                   \
+} while (0)
+
+        if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+            const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
+
+            planes = av_pix_fmt_count_planes(frame->format);
+            if (!desc || planes <= 0) {
+                ret = AVERROR(EINVAL);
+                goto fail;
+            }
+
+            for (i = 0; i < planes; i++) {
+                int v_shift    = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
+                int plane_size = (frame->height >> v_shift) * frame->linesize[i];
+
+                WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
+            }
+        } else {
+            int planar = av_sample_fmt_is_planar(frame->format);
+            planes = planar ? avctx->channels : 1;
+
+            if (planes > FF_ARRAY_ELEMS(frame->buf)) {
+                frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
+                frame->extended_buf = av_malloc(sizeof(*frame->extended_buf) *
+                                                frame->nb_extended_buf);
+                if (!frame->extended_buf) {
+                    ret = AVERROR(ENOMEM);
+                    goto fail;
+                }
+            }
+
+            for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
+                WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
+
+            for (i = 0; i < frame->nb_extended_buf; i++)
+                WRAP_PLANE(frame->extended_buf[i],
+                           frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
+                           frame->linesize[0]);
+        }
+
+        av_buffer_unref(&dummy_buf);
+
+        return 0;
+
+fail:
+        avctx->release_buffer(avctx, frame);
+        av_freep(&priv);
+        av_buffer_unref(&dummy_buf);
+        return ret;
+    }
+#endif
+
+    return avctx->get_buffer2(avctx, frame, flags);
+}
+
+int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
+{
+    int ret = get_buffer_internal(avctx, frame, flags);
+    if (ret < 0)
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+    return ret;
+}
+
+static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame)
+{
+    AVFrame tmp;
+    int ret;
+
+    av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO);
+
+    if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) {
+        av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n",
+               frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
+        av_frame_unref(frame);
+    }
+
+    ff_init_buffer_info(avctx, frame);
+
+    if (!frame->data[0])
+        return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
+
+    if (av_frame_is_writable(frame))
+        return 0;
+
+    av_frame_move_ref(&tmp, frame);
+
+    ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF);
+    if (ret < 0) {
+        av_frame_unref(&tmp);
+        return ret;
+    }
+
+    av_image_copy(frame->data, frame->linesize, tmp.data, tmp.linesize,
+                  frame->format, frame->width, frame->height);
+
+    av_frame_unref(&tmp);
+
+    return 0;
+}
+
+int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
+{
+    int ret = reget_buffer_internal(avctx, frame);
+    if (ret < 0)
+        av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+    return ret;
+}
+
+#if FF_API_GET_BUFFER
+void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic)
+{
+    av_assert0(s->codec_type == AVMEDIA_TYPE_VIDEO);
+
+    av_frame_unref(pic);
+}
+
+int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic)
+{
+    av_assert0(0);
+}
+#endif
+
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
+{
+    int i;
+
+    for (i = 0; i < count; i++) {
+        int r = func(c, (char *)arg + i * size);
+        if (ret)
+            ret[i] = r;
+    }
+    return 0;
+}
+
+int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
+{
+    int i;
+
+    for (i = 0; i < count; i++) {
+        int r = func(c, arg, i, 0);
+        if (ret)
+            ret[i] = r;
+    }
+    return 0;
+}
+
+static int is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
+    return desc->flags & PIX_FMT_HWACCEL;
+}
+
+enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
+{
+    while (*fmt != AV_PIX_FMT_NONE && is_hwaccel_pix_fmt(*fmt))
+        ++fmt;
+    return fmt[0];
+}
+
+void avcodec_get_frame_defaults(AVFrame *frame)
+{
+#if LIBAVCODEC_VERSION_MAJOR >= 55
+     // extended_data should explicitly be freed when needed, this code is unsafe currently
+     // also this is not compatible to the <55 ABI/API
+    if (frame->extended_data != frame->data && 0)
+        av_freep(&frame->extended_data);
+#endif
+
+    memset(frame, 0, sizeof(AVFrame));
+
+    frame->pts                   =
+    frame->pkt_dts               =
+    frame->pkt_pts               = AV_NOPTS_VALUE;
+    av_frame_set_best_effort_timestamp(frame, AV_NOPTS_VALUE);
+    av_frame_set_pkt_duration         (frame, 0);
+    av_frame_set_pkt_pos              (frame, -1);
+    av_frame_set_pkt_size             (frame, -1);
+    frame->key_frame           = 1;
+    frame->sample_aspect_ratio = (AVRational) {0, 1 };
+    frame->format              = -1; /* unknown */
+    frame->extended_data       = frame->data;
+}
+
+AVFrame *avcodec_alloc_frame(void)
+{
+    AVFrame *frame = av_malloc(sizeof(AVFrame));
+
+    if (frame == NULL)
+        return NULL;
+
+    frame->extended_data = NULL;
+    avcodec_get_frame_defaults(frame);
+
+    return frame;
+}
+
+void avcodec_free_frame(AVFrame **frame)
+{
+    AVFrame *f;
+
+    if (!frame || !*frame)
+        return;
+
+    f = *frame;
+
+    if (f->extended_data != f->data)
+        av_freep(&f->extended_data);
+
+    av_freep(frame);
+}
+
+#define MAKE_ACCESSORS(str, name, type, field) \
+    type av_##name##_get_##field(const str *s) { return s->field; } \
+    void av_##name##_set_##field(str *s, type v) { s->field = v; }
+
+MAKE_ACCESSORS(AVCodecContext, codec, AVRational, pkt_timebase)
+MAKE_ACCESSORS(AVCodecContext, codec, const AVCodecDescriptor *, codec_descriptor)
+
+static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
+{
+    memset(sub, 0, sizeof(*sub));
+    sub->pts = AV_NOPTS_VALUE;
+}
+
+static int get_bit_rate(AVCodecContext *ctx)
+{
+    int bit_rate;
+    int bits_per_sample;
+
+    switch (ctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+    case AVMEDIA_TYPE_DATA:
+    case AVMEDIA_TYPE_SUBTITLE:
+    case AVMEDIA_TYPE_ATTACHMENT:
+        bit_rate = ctx->bit_rate;
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
+        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
+        break;
+    default:
+        bit_rate = 0;
+        break;
+    }
+    return bit_rate;
+}
+
+#if FF_API_AVCODEC_OPEN
+int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
+{
+    return avcodec_open2(avctx, codec, NULL);
+}
+#endif
+
+int attribute_align_arg ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
+{
+    int ret = 0;
+
+    ff_unlock_avcodec();
+
+    ret = avcodec_open2(avctx, codec, options);
+
+    ff_lock_avcodec(avctx);
+    return ret;
+}
+
+int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
+{
+    int ret = 0;
+    AVDictionary *tmp = NULL;
+
+    if (avcodec_is_open(avctx))
+        return 0;
+
+    if ((!codec && !avctx->codec)) {
+        av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2()\n");
+        return AVERROR(EINVAL);
+    }
+    if ((codec && avctx->codec && codec != avctx->codec)) {
+        av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
+                                    "but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
+        return AVERROR(EINVAL);
+    }
+    if (!codec)
+        codec = avctx->codec;
+
+    if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
+        return AVERROR(EINVAL);
+
+    if (options)
+        av_dict_copy(&tmp, *options, 0);
+
+    ret = ff_lock_avcodec(avctx);
+    if (ret < 0)
+        return ret;
+
+    avctx->internal = av_mallocz(sizeof(AVCodecInternal));
+    if (!avctx->internal) {
+        ret = AVERROR(ENOMEM);
+        goto end;
+    }
+
+    avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));
+    if (!avctx->internal->pool) {
+        ret = AVERROR(ENOMEM);
+        goto free_and_end;
+    }
+
+    if (codec->priv_data_size > 0) {
+        if (!avctx->priv_data) {
+            avctx->priv_data = av_mallocz(codec->priv_data_size);
+            if (!avctx->priv_data) {
+                ret = AVERROR(ENOMEM);
+                goto end;
+            }
+            if (codec->priv_class) {
+                *(const AVClass **)avctx->priv_data = codec->priv_class;
+                av_opt_set_defaults(avctx->priv_data);
+            }
+        }
+        if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
+            goto free_and_end;
+    } else {
+        avctx->priv_data = NULL;
+    }
+    if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
+        goto free_and_end;
+
+    // only call avcodec_set_dimensions() for non H.264/VP6F codecs so as not to overwrite previously setup dimensions
+    if (!(avctx->coded_width && avctx->coded_height && avctx->width && avctx->height &&
+          (avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_VP6F))) {
+    if (avctx->coded_width && avctx->coded_height)
+        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
+    else if (avctx->width && avctx->height)
+        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
+    }
+
+    if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
+        && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
+           || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
+        av_log(avctx, AV_LOG_WARNING, "Ignoring invalid width/height values\n");
+        avcodec_set_dimensions(avctx, 0, 0);
+    }
+
+    /* if the decoder init function was already called previously,
+     * free the already allocated subtitle_header before overwriting it */
+    if (av_codec_is_decoder(codec))
+        av_freep(&avctx->subtitle_header);
+
+    if (avctx->channels > FF_SANE_NB_CHANNELS) {
+        ret = AVERROR(EINVAL);
+        goto free_and_end;
+    }
+
+    avctx->codec = codec;
+    if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
+        avctx->codec_id == AV_CODEC_ID_NONE) {
+        avctx->codec_type = codec->type;
+        avctx->codec_id   = codec->id;
+    }
+    if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
+                                         && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
+        av_log(avctx, AV_LOG_ERROR, "Codec type or id mismatches\n");
+        ret = AVERROR(EINVAL);
+        goto free_and_end;
+    }
+    avctx->frame_number = 0;
+    avctx->codec_descriptor = avcodec_descriptor_get(avctx->codec_id);
+
+    if (avctx->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
+        avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
+        const char *codec_string = av_codec_is_encoder(codec) ? "encoder" : "decoder";
+        AVCodec *codec2;
+        av_log(NULL, AV_LOG_ERROR,
+               "The %s '%s' is experimental but experimental codecs are not enabled, "
+               "add '-strict %d' if you want to use it.\n",
+               codec_string, codec->name, FF_COMPLIANCE_EXPERIMENTAL);
+        codec2 = av_codec_is_encoder(codec) ? avcodec_find_encoder(codec->id) : avcodec_find_decoder(codec->id);
+        if (!(codec2->capabilities & CODEC_CAP_EXPERIMENTAL))
+            av_log(NULL, AV_LOG_ERROR, "Alternatively use the non experimental %s '%s'.\n",
+                codec_string, codec2->name);
+        ret = AVERROR_EXPERIMENTAL;
+        goto free_and_end;
+    }
+
+    if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
+        (!avctx->time_base.num || !avctx->time_base.den)) {
+        avctx->time_base.num = 1;
+        avctx->time_base.den = avctx->sample_rate;
+    }
+
+    if (!HAVE_THREADS)
+        av_log(avctx, AV_LOG_WARNING, "Warning: not compiled with thread support, using thread emulation\n");
+
+    if (CONFIG_FRAME_THREAD_ENCODER) {
+        ff_unlock_avcodec(); //we will instanciate a few encoders thus kick the counter to prevent false detection of a problem
+        ret = ff_frame_thread_encoder_init(avctx, options ? *options : NULL);
+        ff_lock_avcodec(avctx);
+        if (ret < 0)
+            goto free_and_end;
+    }
+
+    if (HAVE_THREADS && !avctx->thread_opaque
+        && !(avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))) {
+        ret = ff_thread_init(avctx);
+        if (ret < 0) {
+            goto free_and_end;
+        }
+    }
+    if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
+        avctx->thread_count = 1;
+
+    if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
+        av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
+               avctx->codec->max_lowres);
+        ret = AVERROR(EINVAL);
+        goto free_and_end;
+    }
+
+    if (av_codec_is_encoder(avctx->codec)) {
+        int i;
+        if (avctx->codec->sample_fmts) {
+            for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
+                if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
+                    break;
+                if (avctx->channels == 1 &&
+                    av_get_planar_sample_fmt(avctx->sample_fmt) ==
+                    av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
+                    avctx->sample_fmt = avctx->codec->sample_fmts[i];
+                    break;
+                }
+            }
+            if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
+                char buf[128];
+                snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
+                av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
+                       (char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
+                ret = AVERROR(EINVAL);
+                goto free_and_end;
+            }
+        }
+        if (avctx->codec->pix_fmts) {
+            for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
+                if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
+                    break;
+            if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE
+                && !((avctx->codec_id == AV_CODEC_ID_MJPEG || avctx->codec_id == AV_CODEC_ID_LJPEG)
+                     && avctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL)) {
+                char buf[128];
+                snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
+                av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
+                       (char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
+                ret = AVERROR(EINVAL);
+                goto free_and_end;
+            }
+        }
+        if (avctx->codec->supported_samplerates) {
+            for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
+                if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
+                    break;
+            if (avctx->codec->supported_samplerates[i] == 0) {
+                av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
+                       avctx->sample_rate);
+                ret = AVERROR(EINVAL);
+                goto free_and_end;
+            }
+        }
+        if (avctx->codec->channel_layouts) {
+            if (!avctx->channel_layout) {
+                av_log(avctx, AV_LOG_WARNING, "Channel layout not specified\n");
+            } else {
+                for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
+                    if (avctx->channel_layout == avctx->codec->channel_layouts[i])
+                        break;
+                if (avctx->codec->channel_layouts[i] == 0) {
+                    char buf[512];
+                    av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
+                    av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
+                    ret = AVERROR(EINVAL);
+                    goto free_and_end;
+                }
+            }
+        }
+        if (avctx->channel_layout && avctx->channels) {
+            int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
+            if (channels != avctx->channels) {
+                char buf[512];
+                av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
+                av_log(avctx, AV_LOG_ERROR,
+                       "Channel layout '%s' with %d channels does not match number of specified channels %d\n",
+                       buf, channels, avctx->channels);
+                ret = AVERROR(EINVAL);
+                goto free_and_end;
+            }
+        } else if (avctx->channel_layout) {
+            avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
+        }
+        if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
+           avctx->codec_id != AV_CODEC_ID_PNG // For mplayer
+        ) {
+            if (avctx->width <= 0 || avctx->height <= 0) {
+                av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
+                ret = AVERROR(EINVAL);
+                goto free_and_end;
+            }
+        }
+        if (   (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
+            && avctx->bit_rate>0 && avctx->bit_rate<1000) {
+            av_log(avctx, AV_LOG_WARNING, "Bitrate %d is extremely low, maybe you mean %dk\n", avctx->bit_rate, avctx->bit_rate);
+        }
+
+        if (!avctx->rc_initial_buffer_occupancy)
+            avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
+    }
+
+    avctx->pts_correction_num_faulty_pts =
+    avctx->pts_correction_num_faulty_dts = 0;
+    avctx->pts_correction_last_pts =
+    avctx->pts_correction_last_dts = INT64_MIN;
+
+    if (   avctx->codec->init && (!(avctx->active_thread_type&FF_THREAD_FRAME)
+        || avctx->internal->frame_thread_encoder)) {
+        ret = avctx->codec->init(avctx);
+        if (ret < 0) {
+            goto free_and_end;
+        }
+    }
+
+    ret=0;
+
+    if (av_codec_is_decoder(avctx->codec)) {
+        if (!avctx->bit_rate)
+            avctx->bit_rate = get_bit_rate(avctx);
+        /* validate channel layout from the decoder */
+        if (avctx->channel_layout) {
+            int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
+            if (!avctx->channels)
+                avctx->channels = channels;
+            else if (channels != avctx->channels) {
+                char buf[512];
+                av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
+                av_log(avctx, AV_LOG_WARNING,
+                       "Channel layout '%s' with %d channels does not match specified number of channels %d: "
+                       "ignoring specified channel layout\n",
+                       buf, channels, avctx->channels);
+                avctx->channel_layout = 0;
+            }
+        }
+        if (avctx->channels && avctx->channels < 0 ||
+            avctx->channels > FF_SANE_NB_CHANNELS) {
+            ret = AVERROR(EINVAL);
+            goto free_and_end;
+        }
+        if (avctx->sub_charenc) {
+            if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
+                av_log(avctx, AV_LOG_ERROR, "Character encoding is only "
+                       "supported with subtitles codecs\n");
+                ret = AVERROR(EINVAL);
+                goto free_and_end;
+            } else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) {
+                av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, "
+                       "subtitles character encoding will be ignored\n",
+                       avctx->codec_descriptor->name);
+                avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING;
+            } else {
+                /* input character encoding is set for a text based subtitle
+                 * codec at this point */
+                if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC)
+                    avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER;
+
+                if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) {
+#if CONFIG_ICONV
+                    iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc);
+                    if (cd == (iconv_t)-1) {
+                        av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context "
+                               "with input character encoding \"%s\"\n", avctx->sub_charenc);
+                        ret = AVERROR(errno);
+                        goto free_and_end;
+                    }
+                    iconv_close(cd);
+#else
+                    av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles "
+                           "conversion needs a libavcodec built with iconv support "
+                           "for this codec\n");
+                    ret = AVERROR(ENOSYS);
+                    goto free_and_end;
+#endif
+                }
+            }
+        }
+    }
+end:
+    ff_unlock_avcodec();
+    if (options) {
+        av_dict_free(options);
+        *options = tmp;
+    }
+
+    return ret;
+free_and_end:
+    av_dict_free(&tmp);
+    av_freep(&avctx->priv_data);
+    if (avctx->internal)
+        av_freep(&avctx->internal->pool);
+    av_freep(&avctx->internal);
+    avctx->codec = NULL;
+    goto end;
+}
+
+int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int size)
+{
+    if (size < 0 || avpkt->size < 0 || size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "Size %d invalid\n", size);
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx) {
+        av_assert0(!avpkt->data || avpkt->data != avctx->internal->byte_buffer);
+        if (!avpkt->data || avpkt->size < size) {
+            av_fast_padded_malloc(&avctx->internal->byte_buffer, &avctx->internal->byte_buffer_size, size);
+            avpkt->data = avctx->internal->byte_buffer;
+            avpkt->size = avctx->internal->byte_buffer_size;
+            avpkt->destruct = NULL;
+        }
+    }
+
+    if (avpkt->data) {
+        AVBufferRef *buf = avpkt->buf;
+#if FF_API_DESTRUCT_PACKET
+        void *destruct = avpkt->destruct;
+#endif
+
+        if (avpkt->size < size) {
+            av_log(avctx, AV_LOG_ERROR, "User packet is too small (%d < %d)\n", avpkt->size, size);
+            return AVERROR(EINVAL);
+        }
+
+        av_init_packet(avpkt);
+#if FF_API_DESTRUCT_PACKET
+        avpkt->destruct = destruct;
+#endif
+        avpkt->buf      = buf;
+        avpkt->size     = size;
+        return 0;
+    } else {
+        int ret = av_new_packet(avpkt, size);
+        if (ret < 0)
+            av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %d\n", size);
+        return ret;
+    }
+}
+
+int ff_alloc_packet(AVPacket *avpkt, int size)
+{
+    return ff_alloc_packet2(NULL, avpkt, size);
+}
+
+/**
+ * Pad last frame with silence.
+ */
+static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
+{
+    AVFrame *frame = NULL;
+    uint8_t *buf   = NULL;
+    int ret;
+
+    if (!(frame = avcodec_alloc_frame()))
+        return AVERROR(ENOMEM);
+    *frame = *src;
+
+    if ((ret = av_samples_get_buffer_size(&frame->linesize[0], s->channels,
+                                          s->frame_size, s->sample_fmt, 0)) < 0)
+        goto fail;
+
+    if (!(buf = av_malloc(ret))) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    frame->nb_samples = s->frame_size;
+    if ((ret = avcodec_fill_audio_frame(frame, s->channels, s->sample_fmt,
+                                        buf, ret, 0)) < 0)
+        goto fail;
+    if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
+                               src->nb_samples, s->channels, s->sample_fmt)) < 0)
+        goto fail;
+    if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
+                                      frame->nb_samples - src->nb_samples,
+                                      s->channels, s->sample_fmt)) < 0)
+        goto fail;
+
+    *dst = frame;
+
+    return 0;
+
+fail:
+    if (frame->extended_data != frame->data)
+        av_freep(&frame->extended_data);
+    av_freep(&buf);
+    av_freep(&frame);
+    return ret;
+}
+
+int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
+                                              AVPacket *avpkt,
+                                              const AVFrame *frame,
+                                              int *got_packet_ptr)
+{
+    AVFrame tmp;
+    AVFrame *padded_frame = NULL;
+    int ret;
+    AVPacket user_pkt = *avpkt;
+    int needs_realloc = !user_pkt.data;
+
+    *got_packet_ptr = 0;
+
+    if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
+        av_free_packet(avpkt);
+        av_init_packet(avpkt);
+        return 0;
+    }
+
+    /* ensure that extended_data is properly set */
+    if (frame && !frame->extended_data) {
+        if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
+            avctx->channels > AV_NUM_DATA_POINTERS) {
+            av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
+                                        "with more than %d channels, but extended_data is not set.\n",
+                   AV_NUM_DATA_POINTERS);
+            return AVERROR(EINVAL);
+        }
+        av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
+
+        tmp = *frame;
+        tmp.extended_data = tmp.data;
+        frame = &tmp;
+    }
+
+    /* check for valid frame size */
+    if (frame) {
+        if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
+            if (frame->nb_samples > avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "more samples than frame size (avcodec_encode_audio2)\n");
+                return AVERROR(EINVAL);
+            }
+        } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
+            if (frame->nb_samples < avctx->frame_size &&
+                !avctx->internal->last_audio_frame) {
+                ret = pad_last_frame(avctx, &padded_frame, frame);
+                if (ret < 0)
+                    return ret;
+
+                frame = padded_frame;
+                avctx->internal->last_audio_frame = 1;
+            }
+
+            if (frame->nb_samples != avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d) (avcodec_encode_audio2)\n", frame->nb_samples, avctx->frame_size);
+                ret = AVERROR(EINVAL);
+                goto end;
+            }
+        }
+    }
+
+    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
+    if (!ret) {
+        if (*got_packet_ptr) {
+            if (!(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
+                if (avpkt->pts == AV_NOPTS_VALUE)
+                    avpkt->pts = frame->pts;
+                if (!avpkt->duration)
+                    avpkt->duration = ff_samples_to_time_base(avctx,
+                                                              frame->nb_samples);
+            }
+            avpkt->dts = avpkt->pts;
+        } else {
+            avpkt->size = 0;
+        }
+    }
+    if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
+        needs_realloc = 0;
+        if (user_pkt.data) {
+            if (user_pkt.size >= avpkt->size) {
+                memcpy(user_pkt.data, avpkt->data, avpkt->size);
+            } else {
+                av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
+                avpkt->size = user_pkt.size;
+                ret = -1;
+            }
+            avpkt->buf      = user_pkt.buf;
+            avpkt->data     = user_pkt.data;
+            avpkt->destruct = user_pkt.destruct;
+        } else {
+            if (av_dup_packet(avpkt) < 0) {
+                ret = AVERROR(ENOMEM);
+            }
+        }
+    }
+
+    if (!ret) {
+        if (needs_realloc && avpkt->data) {
+            ret = av_buffer_realloc(&avpkt->buf, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (ret >= 0)
+                avpkt->data = avpkt->buf->data;
+        }
+
+        avctx->frame_number++;
+    }
+
+    if (ret < 0 || !*got_packet_ptr) {
+        av_free_packet(avpkt);
+        av_init_packet(avpkt);
+        goto end;
+    }
+
+    /* NOTE: if we add any audio encoders which output non-keyframe packets,
+     *       this needs to be moved to the encoders, but for now we can do it
+     *       here to simplify things */
+    avpkt->flags |= AV_PKT_FLAG_KEY;
+
+end:
+    if (padded_frame) {
+        av_freep(&padded_frame->data[0]);
+        if (padded_frame->extended_data != padded_frame->data)
+            av_freep(&padded_frame->extended_data);
+        av_freep(&padded_frame);
+    }
+
+    return ret;
+}
+
+#if FF_API_OLD_ENCODE_AUDIO
+int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
+                                             uint8_t *buf, int buf_size,
+                                             const short *samples)
+{
+    AVPacket pkt;
+    AVFrame frame0 = { { 0 } };
+    AVFrame *frame;
+    int ret, samples_size, got_packet;
+
+    av_init_packet(&pkt);
+    pkt.data = buf;
+    pkt.size = buf_size;
+
+    if (samples) {
+        frame = &frame0;
+        avcodec_get_frame_defaults(frame);
+
+        if (avctx->frame_size) {
+            frame->nb_samples = avctx->frame_size;
+        } else {
+            /* if frame_size is not set, the number of samples must be
+             * calculated from the buffer size */
+            int64_t nb_samples;
+            if (!av_get_bits_per_sample(avctx->codec_id)) {
+                av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
+                                            "support this codec\n");
+                return AVERROR(EINVAL);
+            }
+            nb_samples = (int64_t)buf_size * 8 /
+                         (av_get_bits_per_sample(avctx->codec_id) *
+                          avctx->channels);
+            if (nb_samples >= INT_MAX)
+                return AVERROR(EINVAL);
+            frame->nb_samples = nb_samples;
+        }
+
+        /* it is assumed that the samples buffer is large enough based on the
+         * relevant parameters */
+        samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
+                                                  frame->nb_samples,
+                                                  avctx->sample_fmt, 1);
+        if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
+                                            avctx->sample_fmt,
+                                            (const uint8_t *)samples,
+                                            samples_size, 1)) < 0)
+            return ret;
+
+        /* fabricate frame pts from sample count.
+         * this is needed because the avcodec_encode_audio() API does not have
+         * a way for the user to provide pts */
+        if (avctx->sample_rate && avctx->time_base.num)
+            frame->pts = ff_samples_to_time_base(avctx,
+                                                 avctx->internal->sample_count);
+        else
+            frame->pts = AV_NOPTS_VALUE;
+        avctx->internal->sample_count += frame->nb_samples;
+    } else {
+        frame = NULL;
+    }
+
+    got_packet = 0;
+    ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
+    if (!ret && got_packet && avctx->coded_frame) {
+        avctx->coded_frame->pts       = pkt.pts;
+        avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
+    }
+    /* free any side data since we cannot return it */
+    ff_packet_free_side_data(&pkt);
+
+    if (frame && frame->extended_data != frame->data)
+        av_freep(&frame->extended_data);
+
+    return ret ? ret : pkt.size;
+}
+
+#endif
+
+#if FF_API_OLD_ENCODE_VIDEO
+int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                                             const AVFrame *pict)
+{
+    AVPacket pkt;
+    int ret, got_packet = 0;
+
+    if (buf_size < FF_MIN_BUFFER_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
+        return -1;
+    }
+
+    av_init_packet(&pkt);
+    pkt.data = buf;
+    pkt.size = buf_size;
+
+    ret = avcodec_encode_video2(avctx, &pkt, pict, &got_packet);
+    if (!ret && got_packet && avctx->coded_frame) {
+        avctx->coded_frame->pts       = pkt.pts;
+        avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
+    }
+
+    /* free any side data since we cannot return it */
+    if (pkt.side_data_elems > 0) {
+        int i;
+        for (i = 0; i < pkt.side_data_elems; i++)
+            av_free(pkt.side_data[i].data);
+        av_freep(&pkt.side_data);
+        pkt.side_data_elems = 0;
+    }
+
+    return ret ? ret : pkt.size;
+}
+
+#endif
+
+int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
+                                              AVPacket *avpkt,
+                                              const AVFrame *frame,
+                                              int *got_packet_ptr)
+{
+    int ret;
+    AVPacket user_pkt = *avpkt;
+    int needs_realloc = !user_pkt.data;
+
+    *got_packet_ptr = 0;
+
+    if(CONFIG_FRAME_THREAD_ENCODER &&
+       avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))
+        return ff_thread_video_encode_frame(avctx, avpkt, frame, got_packet_ptr);
+
+    if ((avctx->flags&CODEC_FLAG_PASS1) && avctx->stats_out)
+        avctx->stats_out[0] = '\0';
+
+    if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
+        av_free_packet(avpkt);
+        av_init_packet(avpkt);
+        avpkt->size = 0;
+        return 0;
+    }
+
+    if (av_image_check_size(avctx->width, avctx->height, 0, avctx))
+        return AVERROR(EINVAL);
+
+    av_assert0(avctx->codec->encode2);
+
+    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
+    av_assert0(ret <= 0);
+
+    if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
+        needs_realloc = 0;
+        if (user_pkt.data) {
+            if (user_pkt.size >= avpkt->size) {
+                memcpy(user_pkt.data, avpkt->data, avpkt->size);
+            } else {
+                av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
+                avpkt->size = user_pkt.size;
+                ret = -1;
+            }
+            avpkt->buf      = user_pkt.buf;
+            avpkt->data     = user_pkt.data;
+            avpkt->destruct = user_pkt.destruct;
+        } else {
+            if (av_dup_packet(avpkt) < 0) {
+                ret = AVERROR(ENOMEM);
+            }
+        }
+    }
+
+    if (!ret) {
+        if (!*got_packet_ptr)
+            avpkt->size = 0;
+        else if (!(avctx->codec->capabilities & CODEC_CAP_DELAY))
+            avpkt->pts = avpkt->dts = frame->pts;
+
+        if (needs_realloc && avpkt->data) {
+            ret = av_buffer_realloc(&avpkt->buf, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (ret >= 0)
+                avpkt->data = avpkt->buf->data;
+        }
+
+        avctx->frame_number++;
+    }
+
+    if (ret < 0 || !*got_packet_ptr)
+        av_free_packet(avpkt);
+
+    emms_c();
+    return ret;
+}
+
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub)
+{
+    int ret;
+    if (sub->start_display_time) {
+        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
+        return -1;
+    }
+
+    ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
+    avctx->frame_number++;
+    return ret;
+}
+
+/**
+ * Attempt to guess proper monotonic timestamps for decoded video frames
+ * which might have incorrect times. Input timestamps may wrap around, in
+ * which case the output will as well.
+ *
+ * @param pts the pts field of the decoded AVPacket, as passed through
+ * AVFrame.pkt_pts
+ * @param dts the dts field of the decoded AVPacket
+ * @return one of the input values, may be AV_NOPTS_VALUE
+ */
+static int64_t guess_correct_pts(AVCodecContext *ctx,
+                                 int64_t reordered_pts, int64_t dts)
+{
+    int64_t pts = AV_NOPTS_VALUE;
+
+    if (dts != AV_NOPTS_VALUE) {
+        ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
+        ctx->pts_correction_last_dts = dts;
+    }
+    if (reordered_pts != AV_NOPTS_VALUE) {
+        ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
+        ctx->pts_correction_last_pts = reordered_pts;
+    }
+    if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
+       && reordered_pts != AV_NOPTS_VALUE)
+        pts = reordered_pts;
+    else
+        pts = dts;
+
+    return pts;
+}
+
+static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    int size = 0;
+    const uint8_t *data;
+    uint32_t flags;
+
+    if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
+        return;
+
+    data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
+    if (!data || size < 4)
+        return;
+    flags = bytestream_get_le32(&data);
+    size -= 4;
+    if (size < 4) /* Required for any of the changes */
+        return;
+    if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
+        avctx->channels = bytestream_get_le32(&data);
+        size -= 4;
+    }
+    if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
+        if (size < 8)
+            return;
+        avctx->channel_layout = bytestream_get_le64(&data);
+        size -= 8;
+    }
+    if (size < 4)
+        return;
+    if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
+        avctx->sample_rate = bytestream_get_le32(&data);
+        size -= 4;
+    }
+    if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
+        if (size < 8)
+            return;
+        avctx->width  = bytestream_get_le32(&data);
+        avctx->height = bytestream_get_le32(&data);
+        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
+        size -= 8;
+    }
+}
+
+static int add_metadata_from_side_data(AVCodecContext *avctx, AVFrame *frame)
+{
+    int size, ret = 0;
+    const uint8_t *side_metadata;
+    const uint8_t *end;
+
+    side_metadata = av_packet_get_side_data(avctx->pkt,
+                                            AV_PKT_DATA_STRINGS_METADATA, &size);
+    if (!side_metadata)
+        goto end;
+    end = side_metadata + size;
+    while (side_metadata < end) {
+        const uint8_t *key = side_metadata;
+        const uint8_t *val = side_metadata + strlen(key) + 1;
+        int ret = av_dict_set(avpriv_frame_get_metadatap(frame), key, val, 0);
+        if (ret < 0)
+            break;
+        side_metadata = val + strlen(val) + 1;
+    }
+end:
+    return ret;
+}
+
+int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
+                                              int *got_picture_ptr,
+                                              const AVPacket *avpkt)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
+    // copy to ensure we do not change avpkt
+    AVPacket tmp = *avpkt;
+
+    if (avctx->codec->type != AVMEDIA_TYPE_VIDEO) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid media type for video\n");
+        return AVERROR(EINVAL);
+    }
+
+    *got_picture_ptr = 0;
+    if ((avctx->coded_width || avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
+        return AVERROR(EINVAL);
+
+    avcodec_get_frame_defaults(picture);
+
+    if (!avctx->refcounted_frames)
+        av_frame_unref(&avci->to_free);
+
+    if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
+        int did_split = av_packet_split_side_data(&tmp);
+        apply_param_change(avctx, &tmp);
+        avctx->pkt = &tmp;
+        if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
+            ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
+                                         &tmp);
+        else {
+            ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
+                                       &tmp);
+            picture->pkt_dts = avpkt->dts;
+
+            if(!avctx->has_b_frames){
+                av_frame_set_pkt_pos(picture, avpkt->pos);
+            }
+            //FIXME these should be under if(!avctx->has_b_frames)
+            /* get_buffer is supposed to set frame parameters */
+            if (!(avctx->codec->capabilities & CODEC_CAP_DR1)) {
+                if (!picture->sample_aspect_ratio.num)    picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
+                if (!picture->width)                      picture->width               = avctx->width;
+                if (!picture->height)                     picture->height              = avctx->height;
+                if (picture->format == AV_PIX_FMT_NONE)   picture->format              = avctx->pix_fmt;
+            }
+        }
+        add_metadata_from_side_data(avctx, picture);
+
+        emms_c(); //needed to avoid an emms_c() call before every return;
+
+        avctx->pkt = NULL;
+        if (did_split) {
+            ff_packet_free_side_data(&tmp);
+            if(ret == tmp.size)
+                ret = avpkt->size;
+        }
+
+        if (ret < 0 && picture->data[0])
+            av_frame_unref(picture);
+
+        if (*got_picture_ptr) {
+            if (!avctx->refcounted_frames) {
+                avci->to_free = *picture;
+                avci->to_free.extended_data = avci->to_free.data;
+            }
+
+            avctx->frame_number++;
+            av_frame_set_best_effort_timestamp(picture,
+                                               guess_correct_pts(avctx,
+                                                                 picture->pkt_pts,
+                                                                 picture->pkt_dts));
+        }
+    } else
+        ret = 0;
+
+    /* many decoders assign whole AVFrames, thus overwriting extended_data;
+     * make sure it's set correctly */
+    picture->extended_data = picture->data;
+
+    return ret;
+}
+
+#if FF_API_OLD_DECODE_AUDIO
+int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
+                                              int *frame_size_ptr,
+                                              AVPacket *avpkt)
+{
+    AVFrame frame = { { 0 } };
+    int ret, got_frame = 0;
+
+    if (avctx->get_buffer != avcodec_default_get_buffer) {
+        av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
+                                    "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
+        av_log(avctx, AV_LOG_ERROR, "Please port your application to "
+                                    "avcodec_decode_audio4()\n");
+        avctx->get_buffer = avcodec_default_get_buffer;
+        avctx->release_buffer = avcodec_default_release_buffer;
+    }
+
+    ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
+
+    if (ret >= 0 && got_frame) {
+        int ch, plane_size;
+        int planar    = av_sample_fmt_is_planar(avctx->sample_fmt);
+        int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
+                                                   frame.nb_samples,
+                                                   avctx->sample_fmt, 1);
+        if (*frame_size_ptr < data_size) {
+            av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
+                                        "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
+            return AVERROR(EINVAL);
+        }
+
+        memcpy(samples, frame.extended_data[0], plane_size);
+
+        if (planar && avctx->channels > 1) {
+            uint8_t *out = ((uint8_t *)samples) + plane_size;
+            for (ch = 1; ch < avctx->channels; ch++) {
+                memcpy(out, frame.extended_data[ch], plane_size);
+                out += plane_size;
+            }
+        }
+        *frame_size_ptr = data_size;
+    } else {
+        *frame_size_ptr = 0;
+    }
+    return ret;
+}
+
+#endif
+
+int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
+                                              AVFrame *frame,
+                                              int *got_frame_ptr,
+                                              const AVPacket *avpkt)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int planar, channels;
+    int ret = 0;
+
+    *got_frame_ptr = 0;
+
+    if (!avpkt->data && avpkt->size) {
+        av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
+        return AVERROR(EINVAL);
+    }
+    if (avctx->codec->type != AVMEDIA_TYPE_AUDIO) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid media type for audio\n");
+        return AVERROR(EINVAL);
+    }
+
+    avcodec_get_frame_defaults(frame);
+
+    if (!avctx->refcounted_frames)
+        av_frame_unref(&avci->to_free);
+
+    if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
+        uint8_t *side;
+        int side_size;
+        // copy to ensure we do not change avpkt
+        AVPacket tmp = *avpkt;
+        int did_split = av_packet_split_side_data(&tmp);
+        apply_param_change(avctx, &tmp);
+
+        avctx->pkt = &tmp;
+        ret = avctx->codec->decode(avctx, frame, got_frame_ptr, &tmp);
+        if (ret >= 0 && *got_frame_ptr) {
+            add_metadata_from_side_data(avctx, frame);
+            avctx->frame_number++;
+            frame->pkt_dts = avpkt->dts;
+            av_frame_set_best_effort_timestamp(frame,
+                                               guess_correct_pts(avctx,
+                                                                 frame->pkt_pts,
+                                                                 frame->pkt_dts));
+            if (frame->format == AV_SAMPLE_FMT_NONE)
+                frame->format = avctx->sample_fmt;
+            if (!frame->channel_layout)
+                frame->channel_layout = avctx->channel_layout;
+            if (!av_frame_get_channels(frame))
+                av_frame_set_channels(frame, avctx->channels);
+            if (!frame->sample_rate)
+                frame->sample_rate = avctx->sample_rate;
+            if (!avctx->refcounted_frames) {
+                avci->to_free = *frame;
+                avci->to_free.extended_data = avci->to_free.data;
+            }
+        }
+
+        side= av_packet_get_side_data(avctx->pkt, AV_PKT_DATA_SKIP_SAMPLES, &side_size);
+        if(side && side_size>=10) {
+            avctx->internal->skip_samples = AV_RL32(side);
+            av_log(avctx, AV_LOG_DEBUG, "skip %d samples due to side data\n",
+                   avctx->internal->skip_samples);
+        }
+        if (avctx->internal->skip_samples && *got_frame_ptr) {
+            if(frame->nb_samples <= avctx->internal->skip_samples){
+                *got_frame_ptr = 0;
+                avctx->internal->skip_samples -= frame->nb_samples;
+                av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
+                       avctx->internal->skip_samples);
+            } else {
+                av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples,
+                                frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format);
+                if(avctx->pkt_timebase.num && avctx->sample_rate) {
+                    int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples,
+                                                   (AVRational){1, avctx->sample_rate},
+                                                   avctx->pkt_timebase);
+                    if(frame->pkt_pts!=AV_NOPTS_VALUE)
+                        frame->pkt_pts += diff_ts;
+                    if(frame->pkt_dts!=AV_NOPTS_VALUE)
+                        frame->pkt_dts += diff_ts;
+                    if (av_frame_get_pkt_duration(frame) >= diff_ts)
+                        av_frame_set_pkt_duration(frame, av_frame_get_pkt_duration(frame) - diff_ts);
+                } else {
+                    av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n");
+                }
+                av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n",
+                       avctx->internal->skip_samples, frame->nb_samples);
+                frame->nb_samples -= avctx->internal->skip_samples;
+                avctx->internal->skip_samples = 0;
+            }
+        }
+
+        avctx->pkt = NULL;
+        if (did_split) {
+            ff_packet_free_side_data(&tmp);
+            if(ret == tmp.size)
+                ret = avpkt->size;
+        }
+
+        if (ret < 0 && frame->data[0])
+            av_frame_unref(frame);
+    }
+
+    /* many decoders assign whole AVFrames, thus overwriting extended_data;
+     * make sure it's set correctly; assume decoders that actually use
+     * extended_data are doing it correctly */
+    if (*got_frame_ptr) {
+        planar   = av_sample_fmt_is_planar(frame->format);
+        channels = av_frame_get_channels(frame);
+        if (!(planar && channels > AV_NUM_DATA_POINTERS))
+            frame->extended_data = frame->data;
+    } else {
+        frame->extended_data = NULL;
+    }
+
+    return ret;
+}
+
+#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */
+static int recode_subtitle(AVCodecContext *avctx,
+                           AVPacket *outpkt, const AVPacket *inpkt)
+{
+#if CONFIG_ICONV
+    iconv_t cd = (iconv_t)-1;
+    int ret = 0;
+    char *inb, *outb;
+    size_t inl, outl;
+    AVPacket tmp;
+#endif
+
+    if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER)
+        return 0;
+
+#if CONFIG_ICONV
+    cd = iconv_open("UTF-8", avctx->sub_charenc);
+    av_assert0(cd != (iconv_t)-1);
+
+    inb = inpkt->data;
+    inl = inpkt->size;
+
+    if (inl >= INT_MAX / UTF8_MAX_BYTES - FF_INPUT_BUFFER_PADDING_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n");
+        ret = AVERROR(ENOMEM);
+        goto end;
+    }
+
+    ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES);
+    if (ret < 0)
+        goto end;
+    outpkt->buf  = tmp.buf;
+    outpkt->data = tmp.data;
+    outpkt->size = tmp.size;
+    outb = outpkt->data;
+    outl = outpkt->size;
+
+    if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
+        iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
+        outl >= outpkt->size || inl != 0) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" "
+               "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc);
+        av_free_packet(&tmp);
+        ret = AVERROR(errno);
+        goto end;
+    }
+    outpkt->size -= outl;
+    outpkt->data[outpkt->size - 1] = '\0';
+
+end:
+    if (cd != (iconv_t)-1)
+        iconv_close(cd);
+    return ret;
+#else
+    av_assert0(!"requesting subtitles recoding without iconv");
+#endif
+}
+
+int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
+                             int *got_sub_ptr,
+                             AVPacket *avpkt)
+{
+    int ret = 0;
+
+    if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n");
+        return AVERROR(EINVAL);
+    }
+
+    *got_sub_ptr = 0;
+    avcodec_get_subtitle_defaults(sub);
+
+    if (avpkt->size) {
+        AVPacket pkt_recoded;
+        AVPacket tmp = *avpkt;
+        int did_split = av_packet_split_side_data(&tmp);
+        //apply_param_change(avctx, &tmp);
+
+        pkt_recoded = tmp;
+        ret = recode_subtitle(avctx, &pkt_recoded, &tmp);
+        if (ret < 0) {
+            *got_sub_ptr = 0;
+        } else {
+            avctx->pkt = &pkt_recoded;
+
+            if (avctx->pkt_timebase.den && avpkt->pts != AV_NOPTS_VALUE)
+                sub->pts = av_rescale_q(avpkt->pts,
+                                        avctx->pkt_timebase, AV_TIME_BASE_Q);
+            ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded);
+            av_assert1((ret >= 0) >= !!*got_sub_ptr &&
+                       !!*got_sub_ptr >= !!sub->num_rects);
+            if (tmp.data != pkt_recoded.data) { // did we recode?
+                /* prevent from destroying side data from original packet */
+                pkt_recoded.side_data = NULL;
+                pkt_recoded.side_data_elems = 0;
+
+                av_free_packet(&pkt_recoded);
+            }
+            sub->format = !(avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB);
+            avctx->pkt = NULL;
+        }
+
+        if (did_split) {
+            ff_packet_free_side_data(&tmp);
+            if(ret == tmp.size)
+                ret = avpkt->size;
+        }
+
+        if (*got_sub_ptr)
+            avctx->frame_number++;
+    }
+
+    return ret;
+}
+
+void avsubtitle_free(AVSubtitle *sub)
+{
+    int i;
+
+    for (i = 0; i < sub->num_rects; i++) {
+        av_freep(&sub->rects[i]->pict.data[0]);
+        av_freep(&sub->rects[i]->pict.data[1]);
+        av_freep(&sub->rects[i]->pict.data[2]);
+        av_freep(&sub->rects[i]->pict.data[3]);
+        av_freep(&sub->rects[i]->text);
+        av_freep(&sub->rects[i]->ass);
+        av_freep(&sub->rects[i]);
+    }
+
+    av_freep(&sub->rects);
+
+    memset(sub, 0, sizeof(AVSubtitle));
+}
+
+av_cold int ff_codec_close_recursive(AVCodecContext *avctx)
+{
+    int ret = 0;
+
+    ff_unlock_avcodec();
+
+    ret = avcodec_close(avctx);
+
+    ff_lock_avcodec(NULL);
+    return ret;
+}
+
+av_cold int avcodec_close(AVCodecContext *avctx)
+{
+    int ret = ff_lock_avcodec(avctx);
+    if (ret < 0)
+        return ret;
+
+    if (avcodec_is_open(avctx)) {
+        FramePool *pool = avctx->internal->pool;
+        int i;
+        if (CONFIG_FRAME_THREAD_ENCODER &&
+            avctx->internal->frame_thread_encoder && avctx->thread_count > 1) {
+            ff_unlock_avcodec();
+            ff_frame_thread_encoder_free(avctx);
+            ff_lock_avcodec(avctx);
+        }
+        if (HAVE_THREADS && avctx->thread_opaque)
+            ff_thread_free(avctx);
+        if (avctx->codec && avctx->codec->close)
+            avctx->codec->close(avctx);
+        avctx->coded_frame = NULL;
+        avctx->internal->byte_buffer_size = 0;
+        av_freep(&avctx->internal->byte_buffer);
+        if (!avctx->refcounted_frames)
+            av_frame_unref(&avctx->internal->to_free);
+        for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)
+            av_buffer_pool_uninit(&pool->pools[i]);
+        av_freep(&avctx->internal->pool);
+        av_freep(&avctx->internal);
+    }
+
+    if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
+        av_opt_free(avctx->priv_data);
+    av_opt_free(avctx);
+    av_freep(&avctx->priv_data);
+    if (av_codec_is_encoder(avctx->codec))
+        av_freep(&avctx->extradata);
+    avctx->codec = NULL;
+    avctx->active_thread_type = 0;
+
+    ff_unlock_avcodec();
+    return 0;
+}
+
+static enum AVCodecID remap_deprecated_codec_id(enum AVCodecID id)
+{
+    switch(id){
+        //This is for future deprecatec codec ids, its empty since
+        //last major bump but will fill up again over time, please don't remove it
+//         case AV_CODEC_ID_UTVIDEO_DEPRECATED: return AV_CODEC_ID_UTVIDEO;
+        case AV_CODEC_ID_OPUS_DEPRECATED: return AV_CODEC_ID_OPUS;
+        case AV_CODEC_ID_TAK_DEPRECATED : return AV_CODEC_ID_TAK;
+        default                         : return id;
+    }
+}
+
+static AVCodec *find_encdec(enum AVCodecID id, int encoder)
+{
+    AVCodec *p, *experimental = NULL;
+    p = first_avcodec;
+    id= remap_deprecated_codec_id(id);
+    while (p) {
+        if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&
+            p->id == id) {
+            if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
+                experimental = p;
+            } else
+                return p;
+        }
+        p = p->next;
+    }
+    return experimental;
+}
+
+AVCodec *avcodec_find_encoder(enum AVCodecID id)
+{
+    return find_encdec(id, 1);
+}
+
+AVCodec *avcodec_find_encoder_by_name(const char *name)
+{
+    AVCodec *p;
+    if (!name)
+        return NULL;
+    p = first_avcodec;
+    while (p) {
+        if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)
+            return p;
+        p = p->next;
+    }
+    return NULL;
+}
+
+AVCodec *avcodec_find_decoder(enum AVCodecID id)
+{
+    return find_encdec(id, 0);
+}
+
+AVCodec *avcodec_find_decoder_by_name(const char *name)
+{
+    AVCodec *p;
+    if (!name)
+        return NULL;
+    p = first_avcodec;
+    while (p) {
+        if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)
+            return p;
+        p = p->next;
+    }
+    return NULL;
+}
+
+const char *avcodec_get_name(enum AVCodecID id)
+{
+    const AVCodecDescriptor *cd;
+    AVCodec *codec;
+
+    if (id == AV_CODEC_ID_NONE)
+        return "none";
+    cd = avcodec_descriptor_get(id);
+    if (cd)
+        return cd->name;
+    av_log(NULL, AV_LOG_WARNING, "Codec 0x%x is not in the full list.\n", id);
+    codec = avcodec_find_decoder(id);
+    if (codec)
+        return codec->name;
+    codec = avcodec_find_encoder(id);
+    if (codec)
+        return codec->name;
+    return "unknown_codec";
+}
+
+size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
+{
+    int i, len, ret = 0;
+
+#define TAG_PRINT(x)                                              \
+    (((x) >= '0' && (x) <= '9') ||                                \
+     ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') ||  \
+     ((x) == '.' || (x) == ' ' || (x) == '-' || (x) == '_'))
+
+    for (i = 0; i < 4; i++) {
+        len = snprintf(buf, buf_size,
+                       TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
+        buf        += len;
+        buf_size    = buf_size > len ? buf_size - len : 0;
+        ret        += len;
+        codec_tag >>= 8;
+    }
+    return ret;
+}
+
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
+{
+    const char *codec_type;
+    const char *codec_name;
+    const char *profile = NULL;
+    const AVCodec *p;
+    int bitrate;
+    AVRational display_aspect_ratio;
+
+    if (!buf || buf_size <= 0)
+        return;
+    codec_type = av_get_media_type_string(enc->codec_type);
+    codec_name = avcodec_get_name(enc->codec_id);
+    if (enc->profile != FF_PROFILE_UNKNOWN) {
+        if (enc->codec)
+            p = enc->codec;
+        else
+            p = encode ? avcodec_find_encoder(enc->codec_id) :
+                        avcodec_find_decoder(enc->codec_id);
+        if (p)
+            profile = av_get_profile_name(p, enc->profile);
+    }
+
+    snprintf(buf, buf_size, "%s: %s%s", codec_type ? codec_type : "unknown",
+             codec_name, enc->mb_decision ? " (hq)" : "");
+    buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */
+    if (profile)
+        snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", profile);
+    if (enc->codec_tag) {
+        char tag_buf[32];
+        av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
+        snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                 " (%s / 0x%04X)", tag_buf, enc->codec_tag);
+    }
+
+    switch (enc->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+        if (enc->pix_fmt != AV_PIX_FMT_NONE) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %s",
+                     av_get_pix_fmt_name(enc->pix_fmt));
+            if (enc->bits_per_raw_sample &&
+                enc->bits_per_raw_sample <= av_pix_fmt_desc_get(enc->pix_fmt)->comp[0].depth_minus1)
+                snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                         " (%d bpc)", enc->bits_per_raw_sample);
+        }
+        if (enc->width) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %dx%d",
+                     enc->width, enc->height);
+            if (enc->sample_aspect_ratio.num) {
+                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
+                          enc->width * enc->sample_aspect_ratio.num,
+                          enc->height * enc->sample_aspect_ratio.den,
+                          1024 * 1024);
+                snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                         " [SAR %d:%d DAR %d:%d]",
+                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
+                         display_aspect_ratio.num, display_aspect_ratio.den);
+            }
+            if (av_log_get_level() >= AV_LOG_DEBUG) {
+                int g = av_gcd(enc->time_base.num, enc->time_base.den);
+                snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                         ", %d/%d",
+                         enc->time_base.num / g, enc->time_base.den / g);
+            }
+        }
+        if (encode) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", q=%d-%d", enc->qmin, enc->qmax);
+        }
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        if (enc->sample_rate) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %d Hz", enc->sample_rate);
+        }
+        av_strlcat(buf, ", ", buf_size);
+        av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
+        if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %s", av_get_sample_fmt_name(enc->sample_fmt));
+        }
+        break;
+    case AVMEDIA_TYPE_DATA:
+        if (av_log_get_level() >= AV_LOG_DEBUG) {
+            int g = av_gcd(enc->time_base.num, enc->time_base.den);
+            if (g)
+                snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                         ", %d/%d",
+                         enc->time_base.num / g, enc->time_base.den / g);
+        }
+        break;
+    default:
+        return;
+    }
+    if (encode) {
+        if (enc->flags & CODEC_FLAG_PASS1)
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", pass 1");
+        if (enc->flags & CODEC_FLAG_PASS2)
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", pass 2");
+    }
+    bitrate = get_bit_rate(enc);
+    if (bitrate != 0) {
+        snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                 ", %d kb/s", bitrate / 1000);
+    }
+}
+
+const char *av_get_profile_name(const AVCodec *codec, int profile)
+{
+    const AVProfile *p;
+    if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
+        return NULL;
+
+    for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
+        if (p->profile == profile)
+            return p->name;
+
+    return NULL;
+}
+
+unsigned avcodec_version(void)
+{
+//    av_assert0(AV_CODEC_ID_V410==164);
+    av_assert0(AV_CODEC_ID_PCM_S8_PLANAR==65563);
+    av_assert0(AV_CODEC_ID_ADPCM_G722==69660);
+//     av_assert0(AV_CODEC_ID_BMV_AUDIO==86071);
+    av_assert0(AV_CODEC_ID_SRT==94216);
+    av_assert0(LIBAVCODEC_VERSION_MICRO >= 100);
+
+    av_assert0(CODEC_ID_CLLC == AV_CODEC_ID_CLLC);
+    av_assert0(CODEC_ID_PCM_S8_PLANAR == AV_CODEC_ID_PCM_S8_PLANAR);
+    av_assert0(CODEC_ID_ADPCM_IMA_APC == AV_CODEC_ID_ADPCM_IMA_APC);
+    av_assert0(CODEC_ID_ILBC == AV_CODEC_ID_ILBC);
+    av_assert0(CODEC_ID_SRT == AV_CODEC_ID_SRT);
+    return LIBAVCODEC_VERSION_INT;
+}
+
+const char *avcodec_configuration(void)
+{
+    return FFMPEG_CONFIGURATION;
+}
+
+const char *avcodec_license(void)
+{
+#define LICENSE_PREFIX "libavcodec license: "
+    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+}
+
+void avcodec_flush_buffers(AVCodecContext *avctx)
+{
+    if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
+        ff_thread_flush(avctx);
+    else if (avctx->codec->flush)
+        avctx->codec->flush(avctx);
+
+    avctx->pts_correction_last_pts =
+    avctx->pts_correction_last_dts = INT64_MIN;
+}
+
+int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
+{
+    switch (codec_id) {
+    case AV_CODEC_ID_8SVX_EXP:
+    case AV_CODEC_ID_8SVX_FIB:
+    case AV_CODEC_ID_ADPCM_CT:
+    case AV_CODEC_ID_ADPCM_IMA_APC:
+    case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
+    case AV_CODEC_ID_ADPCM_IMA_OKI:
+    case AV_CODEC_ID_ADPCM_IMA_WS:
+    case AV_CODEC_ID_ADPCM_G722:
+    case AV_CODEC_ID_ADPCM_YAMAHA:
+        return 4;
+    case AV_CODEC_ID_PCM_ALAW:
+    case AV_CODEC_ID_PCM_MULAW:
+    case AV_CODEC_ID_PCM_S8:
+    case AV_CODEC_ID_PCM_S8_PLANAR:
+    case AV_CODEC_ID_PCM_U8:
+    case AV_CODEC_ID_PCM_ZORK:
+        return 8;
+    case AV_CODEC_ID_PCM_S16BE:
+    case AV_CODEC_ID_PCM_S16BE_PLANAR:
+    case AV_CODEC_ID_PCM_S16LE:
+    case AV_CODEC_ID_PCM_S16LE_PLANAR:
+    case AV_CODEC_ID_PCM_U16BE:
+    case AV_CODEC_ID_PCM_U16LE:
+        return 16;
+    case AV_CODEC_ID_PCM_S24DAUD:
+    case AV_CODEC_ID_PCM_S24BE:
+    case AV_CODEC_ID_PCM_S24LE:
+    case AV_CODEC_ID_PCM_S24LE_PLANAR:
+    case AV_CODEC_ID_PCM_U24BE:
+    case AV_CODEC_ID_PCM_U24LE:
+        return 24;
+    case AV_CODEC_ID_PCM_S32BE:
+    case AV_CODEC_ID_PCM_S32LE:
+    case AV_CODEC_ID_PCM_S32LE_PLANAR:
+    case AV_CODEC_ID_PCM_U32BE:
+    case AV_CODEC_ID_PCM_U32LE:
+    case AV_CODEC_ID_PCM_F32BE:
+    case AV_CODEC_ID_PCM_F32LE:
+        return 32;
+    case AV_CODEC_ID_PCM_F64BE:
+    case AV_CODEC_ID_PCM_F64LE:
+        return 64;
+    default:
+        return 0;
+    }
+}
+
+enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
+{
+    static const enum AVCodecID map[AV_SAMPLE_FMT_NB][2] = {
+        [AV_SAMPLE_FMT_U8  ] = { AV_CODEC_ID_PCM_U8,    AV_CODEC_ID_PCM_U8    },
+        [AV_SAMPLE_FMT_S16 ] = { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S16BE },
+        [AV_SAMPLE_FMT_S32 ] = { AV_CODEC_ID_PCM_S32LE, AV_CODEC_ID_PCM_S32BE },
+        [AV_SAMPLE_FMT_FLT ] = { AV_CODEC_ID_PCM_F32LE, AV_CODEC_ID_PCM_F32BE },
+        [AV_SAMPLE_FMT_DBL ] = { AV_CODEC_ID_PCM_F64LE, AV_CODEC_ID_PCM_F64BE },
+        [AV_SAMPLE_FMT_U8P ] = { AV_CODEC_ID_PCM_U8,    AV_CODEC_ID_PCM_U8    },
+        [AV_SAMPLE_FMT_S16P] = { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S16BE },
+        [AV_SAMPLE_FMT_S32P] = { AV_CODEC_ID_PCM_S32LE, AV_CODEC_ID_PCM_S32BE },
+        [AV_SAMPLE_FMT_FLTP] = { AV_CODEC_ID_PCM_F32LE, AV_CODEC_ID_PCM_F32BE },
+        [AV_SAMPLE_FMT_DBLP] = { AV_CODEC_ID_PCM_F64LE, AV_CODEC_ID_PCM_F64BE },
+    };
+    if (fmt < 0 || fmt >= AV_SAMPLE_FMT_NB)
+        return AV_CODEC_ID_NONE;
+    if (be < 0 || be > 1)
+        be = AV_NE(1, 0);
+    return map[fmt][be];
+}
+
+int av_get_bits_per_sample(enum AVCodecID codec_id)
+{
+    switch (codec_id) {
+    case AV_CODEC_ID_ADPCM_SBPRO_2:
+        return 2;
+    case AV_CODEC_ID_ADPCM_SBPRO_3:
+        return 3;
+    case AV_CODEC_ID_ADPCM_SBPRO_4:
+    case AV_CODEC_ID_ADPCM_IMA_WAV:
+    case AV_CODEC_ID_ADPCM_IMA_QT:
+    case AV_CODEC_ID_ADPCM_SWF:
+    case AV_CODEC_ID_ADPCM_MS:
+        return 4;
+    default:
+        return av_get_exact_bits_per_sample(codec_id);
+    }
+}
+
+int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
+{
+    int id, sr, ch, ba, tag, bps;
+
+    id  = avctx->codec_id;
+    sr  = avctx->sample_rate;
+    ch  = avctx->channels;
+    ba  = avctx->block_align;
+    tag = avctx->codec_tag;
+    bps = av_get_exact_bits_per_sample(avctx->codec_id);
+
+    /* codecs with an exact constant bits per sample */
+    if (bps > 0 && ch > 0 && frame_bytes > 0 && ch < 32768 && bps < 32768)
+        return (frame_bytes * 8LL) / (bps * ch);
+    bps = avctx->bits_per_coded_sample;
+
+    /* codecs with a fixed packet duration */
+    switch (id) {
+    case AV_CODEC_ID_ADPCM_ADX:    return   32;
+    case AV_CODEC_ID_ADPCM_IMA_QT: return   64;
+    case AV_CODEC_ID_ADPCM_EA_XAS: return  128;
+    case AV_CODEC_ID_AMR_NB:
+    case AV_CODEC_ID_EVRC:
+    case AV_CODEC_ID_GSM:
+    case AV_CODEC_ID_QCELP:
+    case AV_CODEC_ID_RA_288:       return  160;
+    case AV_CODEC_ID_AMR_WB:
+    case AV_CODEC_ID_GSM_MS:       return  320;
+    case AV_CODEC_ID_MP1:          return  384;
+    case AV_CODEC_ID_ATRAC1:       return  512;
+    case AV_CODEC_ID_ATRAC3:       return 1024;
+    case AV_CODEC_ID_MP2:
+    case AV_CODEC_ID_MUSEPACK7:    return 1152;
+    case AV_CODEC_ID_AC3:          return 1536;
+    }
+
+    if (sr > 0) {
+        /* calc from sample rate */
+        if (id == AV_CODEC_ID_TTA)
+            return 256 * sr / 245;
+
+        if (ch > 0) {
+            /* calc from sample rate and channels */
+            if (id == AV_CODEC_ID_BINKAUDIO_DCT)
+                return (480 << (sr / 22050)) / ch;
+        }
+    }
+
+    if (ba > 0) {
+        /* calc from block_align */
+        if (id == AV_CODEC_ID_SIPR) {
+            switch (ba) {
+            case 20: return 160;
+            case 19: return 144;
+            case 29: return 288;
+            case 37: return 480;
+            }
+        } else if (id == AV_CODEC_ID_ILBC) {
+            switch (ba) {
+            case 38: return 160;
+            case 50: return 240;
+            }
+        }
+    }
+
+    if (frame_bytes > 0) {
+        /* calc from frame_bytes only */
+        if (id == AV_CODEC_ID_TRUESPEECH)
+            return 240 * (frame_bytes / 32);
+        if (id == AV_CODEC_ID_NELLYMOSER)
+            return 256 * (frame_bytes / 64);
+        if (id == AV_CODEC_ID_RA_144)
+            return 160 * (frame_bytes / 20);
+        if (id == AV_CODEC_ID_G723_1)
+            return 240 * (frame_bytes / 24);
+
+        if (bps > 0) {
+            /* calc from frame_bytes and bits_per_coded_sample */
+            if (id == AV_CODEC_ID_ADPCM_G726)
+                return frame_bytes * 8 / bps;
+        }
+
+        if (ch > 0) {
+            /* calc from frame_bytes and channels */
+            switch (id) {
+            case AV_CODEC_ID_ADPCM_AFC:
+                return frame_bytes / (9 * ch) * 16;
+            case AV_CODEC_ID_ADPCM_4XM:
+            case AV_CODEC_ID_ADPCM_IMA_ISS:
+                return (frame_bytes - 4 * ch) * 2 / ch;
+            case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
+                return (frame_bytes - 4) * 2 / ch;
+            case AV_CODEC_ID_ADPCM_IMA_AMV:
+                return (frame_bytes - 8) * 2 / ch;
+            case AV_CODEC_ID_ADPCM_XA:
+                return (frame_bytes / 128) * 224 / ch;
+            case AV_CODEC_ID_INTERPLAY_DPCM:
+                return (frame_bytes - 6 - ch) / ch;
+            case AV_CODEC_ID_ROQ_DPCM:
+                return (frame_bytes - 8) / ch;
+            case AV_CODEC_ID_XAN_DPCM:
+                return (frame_bytes - 2 * ch) / ch;
+            case AV_CODEC_ID_MACE3:
+                return 3 * frame_bytes / ch;
+            case AV_CODEC_ID_MACE6:
+                return 6 * frame_bytes / ch;
+            case AV_CODEC_ID_PCM_LXF:
+                return 2 * (frame_bytes / (5 * ch));
+            case AV_CODEC_ID_IAC:
+            case AV_CODEC_ID_IMC:
+                return 4 * frame_bytes / ch;
+            }
+
+            if (tag) {
+                /* calc from frame_bytes, channels, and codec_tag */
+                if (id == AV_CODEC_ID_SOL_DPCM) {
+                    if (tag == 3)
+                        return frame_bytes / ch;
+                    else
+                        return frame_bytes * 2 / ch;
+                }
+            }
+
+            if (ba > 0) {
+                /* calc from frame_bytes, channels, and block_align */
+                int blocks = frame_bytes / ba;
+                switch (avctx->codec_id) {
+                case AV_CODEC_ID_ADPCM_IMA_WAV:
+                    return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);
+                case AV_CODEC_ID_ADPCM_IMA_DK3:
+                    return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
+                case AV_CODEC_ID_ADPCM_IMA_DK4:
+                    return blocks * (1 + (ba - 4 * ch) * 2 / ch);
+                case AV_CODEC_ID_ADPCM_MS:
+                    return blocks * (2 + (ba - 7 * ch) * 2 / ch);
+                }
+            }
+
+            if (bps > 0) {
+                /* calc from frame_bytes, channels, and bits_per_coded_sample */
+                switch (avctx->codec_id) {
+                case AV_CODEC_ID_PCM_DVD:
+                    if(bps<4)
+                        return 0;
+                    return 2 * (frame_bytes / ((bps * 2 / 8) * ch));
+                case AV_CODEC_ID_PCM_BLURAY:
+                    if(bps<4)
+                        return 0;
+                    return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);
+                case AV_CODEC_ID_S302M:
+                    return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;
+                }
+            }
+        }
+    }
+
+    return 0;
+}
+
+#if !HAVE_THREADS
+int ff_thread_init(AVCodecContext *s)
+{
+    return -1;
+}
+
+#endif
+
+unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
+{
+    unsigned int n = 0;
+
+    while (v >= 0xff) {
+        *s++ = 0xff;
+        v -= 0xff;
+        n++;
+    }
+    *s = v;
+    n++;
+    return n;
+}
+
+int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)
+{
+    int i;
+    for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;
+    return i;
+}
+
+#if FF_API_MISSING_SAMPLE
+void av_log_missing_feature(void *avc, const char *feature, int want_sample)
+{
+    av_log(avc, AV_LOG_WARNING, "%s is not implemented. Update your FFmpeg "
+            "version to the newest one from Git. If the problem still "
+            "occurs, it means that your file has a feature which has not "
+            "been implemented.\n", feature);
+    if(want_sample)
+        av_log_ask_for_sample(avc, NULL);
+}
+
+void av_log_ask_for_sample(void *avc, const char *msg, ...)
+{
+    va_list argument_list;
+
+    va_start(argument_list, msg);
+
+    if (msg)
+        av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
+    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
+            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
+            "and contact the ffmpeg-devel mailing list.\n");
+
+    va_end(argument_list);
+}
+#endif /* FF_API_MISSING_SAMPLE */
+
+static AVHWAccel *first_hwaccel = NULL;
+
+void av_register_hwaccel(AVHWAccel *hwaccel)
+{
+    AVHWAccel **p = &first_hwaccel;
+    while (*p)
+        p = &(*p)->next;
+    *p = hwaccel;
+    hwaccel->next = NULL;
+}
+
+AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
+{
+    return hwaccel ? hwaccel->next : first_hwaccel;
+}
+
+AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
+{
+    AVHWAccel *hwaccel = NULL;
+
+    while ((hwaccel = av_hwaccel_next(hwaccel)))
+        if (hwaccel->id == codec_id
+            && hwaccel->pix_fmt == pix_fmt)
+            return hwaccel;
+    return NULL;
+}
+
+int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
+{
+    if (ff_lockmgr_cb) {
+        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
+            return -1;
+        if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
+            return -1;
+    }
+
+    ff_lockmgr_cb = cb;
+
+    if (ff_lockmgr_cb) {
+        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
+            return -1;
+        if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
+            return -1;
+    }
+    return 0;
+}
+
+int ff_lock_avcodec(AVCodecContext *log_ctx)
+{
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
+            return -1;
+    }
+    entangled_thread_counter++;
+    if (entangled_thread_counter != 1) {
+        av_log(log_ctx, AV_LOG_ERROR, "Insufficient thread locking around avcodec_open/close()\n");
+        ff_avcodec_locked = 1;
+        ff_unlock_avcodec();
+        return AVERROR(EINVAL);
+    }
+    av_assert0(!ff_avcodec_locked);
+    ff_avcodec_locked = 1;
+    return 0;
+}
+
+int ff_unlock_avcodec(void)
+{
+    av_assert0(ff_avcodec_locked);
+    ff_avcodec_locked = 0;
+    entangled_thread_counter--;
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE))
+            return -1;
+    }
+    return 0;
+}
+
+int avpriv_lock_avformat(void)
+{
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
+            return -1;
+    }
+    return 0;
+}
+
+int avpriv_unlock_avformat(void)
+{
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
+            return -1;
+    }
+    return 0;
+}
+
+unsigned int avpriv_toupper4(unsigned int x)
+{
+    return av_toupper(x & 0xFF) +
+          (av_toupper((x >>  8) & 0xFF) << 8)  +
+          (av_toupper((x >> 16) & 0xFF) << 16) +
+          (av_toupper((x >> 24) & 0xFF) << 24);
+}
+
+int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
+{
+    int ret;
+
+    dst->owner = src->owner;
+
+    ret = av_frame_ref(dst->f, src->f);
+    if (ret < 0)
+        return ret;
+
+    if (src->progress &&
+        !(dst->progress = av_buffer_ref(src->progress))) {
+        ff_thread_release_buffer(dst->owner, dst);
+        return AVERROR(ENOMEM);
+    }
+
+    return 0;
+}
+
+#if !HAVE_THREADS
+
+int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
+{
+    f->owner = avctx;
+    return ff_get_buffer(avctx, f->f, flags);
+}
+
+void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
+{
+    av_frame_unref(f->f);
+}
+
+void ff_thread_finish_setup(AVCodecContext *avctx)
+{
+}
+
+void ff_thread_report_progress(ThreadFrame *f, int progress, int field)
+{
+}
+
+void ff_thread_await_progress(ThreadFrame *f, int progress, int field)
+{
+}
+
+int ff_thread_can_start_frame(AVCodecContext *avctx)
+{
+    return 1;
+}
+
+#endif
+
+enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
+{
+    AVCodec *c= avcodec_find_decoder(codec_id);
+    if(!c)
+        c= avcodec_find_encoder(codec_id);
+    if(c)
+        return c->type;
+
+    if (codec_id <= AV_CODEC_ID_NONE)
+        return AVMEDIA_TYPE_UNKNOWN;
+    else if (codec_id < AV_CODEC_ID_FIRST_AUDIO)
+        return AVMEDIA_TYPE_VIDEO;
+    else if (codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
+        return AVMEDIA_TYPE_AUDIO;
+    else if (codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
+        return AVMEDIA_TYPE_SUBTITLE;
+
+    return AVMEDIA_TYPE_UNKNOWN;
+}
+
+int avcodec_is_open(AVCodecContext *s)
+{
+    return !!s->internal;
+}
+
+int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf)
+{
+    int ret;
+    char *str;
+
+    ret = av_bprint_finalize(buf, &str);
+    if (ret < 0)
+        return ret;
+    avctx->extradata = str;
+    /* Note: the string is NUL terminated (so extradata can be read as a
+     * string), but the ending character is not accounted in the size (in
+     * binary formats you are likely not supposed to mux that character). When
+     * extradata is copied, it is also padded with FF_INPUT_BUFFER_PADDING_SIZE
+     * zeros. */
+    avctx->extradata_size = buf->len;
+    return 0;
+}