adding ffmpeg specific version

1 files changed, 662 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/vmdav.c b/ffmpeg1/libavcodec/vmdav.c
new file mode 100644
index 0000000..0e27ef6
--- /dev/null
+++ b/ffmpeg1/libavcodec/vmdav.c
@@ -0,0 +1,662 @@
+/*
+ * Sierra VMD Audio & Video Decoders
+ * Copyright (C) 2004 the ffmpeg project
+ *
+ * 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
+ * Sierra VMD audio & video decoders
+ * by Vladimir "VAG" Gneushev (vagsoft at mail.ru)
+ * for more information on the Sierra VMD format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ *
+ * The video decoder outputs PAL8 colorspace data. The decoder expects
+ * a 0x330-byte VMD file header to be transmitted via extradata during
+ * codec initialization. Each encoded frame that is sent to this decoder
+ * is expected to be prepended with the appropriate 16-byte frame
+ * information record from the VMD file.
+ *
+ * The audio decoder, like the video decoder, expects each encoded data
+ * chunk to be prepended with the appropriate 16-byte frame information
+ * record from the VMD file. It does not require the 0x330-byte VMD file
+ * header, but it does need the audio setup parameters passed in through
+ * normal libavcodec API means.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "internal.h"
+
+#define VMD_HEADER_SIZE 0x330
+#define PALETTE_COUNT 256
+
+/*
+ * Video Decoder
+ */
+
+typedef struct VmdVideoContext {
+
+    AVCodecContext *avctx;
+    AVFrame prev_frame;
+
+    const unsigned char *buf;
+    int size;
+
+    unsigned char palette[PALETTE_COUNT * 4];
+    unsigned char *unpack_buffer;
+    int unpack_buffer_size;
+
+    int x_off, y_off;
+} VmdVideoContext;
+
+#define QUEUE_SIZE 0x1000
+#define QUEUE_MASK 0x0FFF
+
+static void lz_unpack(const unsigned char *src, int src_len,
+                      unsigned char *dest, int dest_len)
+{
+    const unsigned char *s;
+    const unsigned char *s_end;
+    unsigned char *d;
+    unsigned char *d_end;
+    unsigned char queue[QUEUE_SIZE];
+    unsigned int qpos;
+    unsigned int dataleft;
+    unsigned int chainofs;
+    unsigned int chainlen;
+    unsigned int speclen;
+    unsigned char tag;
+    unsigned int i, j;
+
+    s = src;
+    s_end = src + src_len;
+    d = dest;
+    d_end = d + dest_len;
+
+    if (s_end - s < 8)
+        return;
+    dataleft = AV_RL32(s);
+    s += 4;
+    memset(queue, 0x20, QUEUE_SIZE);
+    if (AV_RL32(s) == 0x56781234) {
+        s += 4;
+        qpos = 0x111;
+        speclen = 0xF + 3;
+    } else {
+        qpos = 0xFEE;
+        speclen = 100;  /* no speclen */
+    }
+
+    while (s_end - s > 0 && dataleft > 0) {
+        tag = *s++;
+        if ((tag == 0xFF) && (dataleft > 8)) {
+            if (d_end - d < 8 || s_end - s < 8)
+                return;
+            for (i = 0; i < 8; i++) {
+                queue[qpos++] = *d++ = *s++;
+                qpos &= QUEUE_MASK;
+            }
+            dataleft -= 8;
+        } else {
+            for (i = 0; i < 8; i++) {
+                if (dataleft == 0)
+                    break;
+                if (tag & 0x01) {
+                    if (d_end - d < 1 || s_end - s < 1)
+                        return;
+                    queue[qpos++] = *d++ = *s++;
+                    qpos &= QUEUE_MASK;
+                    dataleft--;
+                } else {
+                    if (s_end - s < 2)
+                        return;
+                    chainofs = *s++;
+                    chainofs |= ((*s & 0xF0) << 4);
+                    chainlen = (*s++ & 0x0F) + 3;
+                    if (chainlen == speclen) {
+                        if (s_end - s < 1)
+                            return;
+                        chainlen = *s++ + 0xF + 3;
+                    }
+                    if (d_end - d < chainlen)
+                        return;
+                    for (j = 0; j < chainlen; j++) {
+                        *d = queue[chainofs++ & QUEUE_MASK];
+                        queue[qpos++] = *d++;
+                        qpos &= QUEUE_MASK;
+                    }
+                    dataleft -= chainlen;
+                }
+                tag >>= 1;
+            }
+        }
+    }
+}
+
+static int rle_unpack(const unsigned char *src, int src_len, int src_count,
+                      unsigned char *dest, int dest_len)
+{
+    const unsigned char *ps;
+    const unsigned char *ps_end;
+    unsigned char *pd;
+    int i, l;
+    unsigned char *dest_end = dest + dest_len;
+
+    ps = src;
+    ps_end = src + src_len;
+    pd = dest;
+    if (src_count & 1) {
+        if (ps_end - ps < 1)
+            return 0;
+        *pd++ = *ps++;
+    }
+
+    src_count >>= 1;
+    i = 0;
+    do {
+        if (ps_end - ps < 1)
+            break;
+        l = *ps++;
+        if (l & 0x80) {
+            l = (l & 0x7F) * 2;
+            if (dest_end - pd < l || ps_end - ps < l)
+                return ps - src;
+            memcpy(pd, ps, l);
+            ps += l;
+            pd += l;
+        } else {
+            if (dest_end - pd < i || ps_end - ps < 2)
+                return ps - src;
+            for (i = 0; i < l; i++) {
+                *pd++ = ps[0];
+                *pd++ = ps[1];
+            }
+            ps += 2;
+        }
+        i += l;
+    } while (i < src_count);
+
+    return ps - src;
+}
+
+static void vmd_decode(VmdVideoContext *s, AVFrame *frame)
+{
+    int i;
+    unsigned int *palette32;
+    unsigned char r, g, b;
+
+    /* point to the start of the encoded data */
+    const unsigned char *p = s->buf + 16;
+    const unsigned char *p_end = s->buf + s->size;
+
+    const unsigned char *pb;
+    const unsigned char *pb_end;
+    unsigned char meth;
+    unsigned char *dp;   /* pointer to current frame */
+    unsigned char *pp;   /* pointer to previous frame */
+    unsigned char len;
+    int ofs;
+
+    int frame_x, frame_y;
+    int frame_width, frame_height;
+
+    frame_x = AV_RL16(&s->buf[6]);
+    frame_y = AV_RL16(&s->buf[8]);
+    frame_width = AV_RL16(&s->buf[10]) - frame_x + 1;
+    frame_height = AV_RL16(&s->buf[12]) - frame_y + 1;
+    if (frame_x < 0 || frame_width < 0 ||
+        frame_x >= s->avctx->width ||
+        frame_width > s->avctx->width ||
+        frame_x + frame_width > s->avctx->width)
+        return;
+    if (frame_y < 0 || frame_height < 0 ||
+        frame_y >= s->avctx->height ||
+        frame_height > s->avctx->height ||
+        frame_y + frame_height > s->avctx->height)
+        return;
+
+    if ((frame_width == s->avctx->width && frame_height == s->avctx->height) &&
+        (frame_x || frame_y)) {
+
+        s->x_off = frame_x;
+        s->y_off = frame_y;
+    }
+    frame_x -= s->x_off;
+    frame_y -= s->y_off;
+
+    /* if only a certain region will be updated, copy the entire previous
+     * frame before the decode */
+    if (s->prev_frame.data[0] &&
+        (frame_x || frame_y || (frame_width != s->avctx->width) ||
+        (frame_height != s->avctx->height))) {
+
+        memcpy(frame->data[0], s->prev_frame.data[0],
+            s->avctx->height * frame->linesize[0]);
+    }
+
+    /* check if there is a new palette */
+    if (s->buf[15] & 0x02) {
+        if (p_end - p < 2 + 3 * PALETTE_COUNT)
+            return;
+        p += 2;
+        palette32 = (unsigned int *)s->palette;
+        for (i = 0; i < PALETTE_COUNT; i++) {
+            r = *p++ * 4;
+            g = *p++ * 4;
+            b = *p++ * 4;
+            palette32[i] = 0xFFU << 24 | r << 16 | g << 8 | b;
+            palette32[i] |= palette32[i] >> 6 & 0x30303;
+        }
+    }
+    if (p < p_end) {
+        /* originally UnpackFrame in VAG's code */
+        pb = p;
+        pb_end = p_end;
+        meth = *pb++;
+        if (meth & 0x80) {
+            lz_unpack(pb, p_end - pb, s->unpack_buffer, s->unpack_buffer_size);
+            meth &= 0x7F;
+            pb = s->unpack_buffer;
+            pb_end = s->unpack_buffer + s->unpack_buffer_size;
+        }
+
+        dp = &frame->data[0][frame_y * frame->linesize[0] + frame_x];
+        pp = &s->prev_frame.data[0][frame_y * s->prev_frame.linesize[0] + frame_x];
+        switch (meth) {
+        case 1:
+            for (i = 0; i < frame_height; i++) {
+                ofs = 0;
+                do {
+                    if (pb_end - pb < 1)
+                        return;
+                    len = *pb++;
+                    if (len & 0x80) {
+                        len = (len & 0x7F) + 1;
+                        if (ofs + len > frame_width || pb_end - pb < len)
+                            return;
+                        memcpy(&dp[ofs], pb, len);
+                        pb += len;
+                        ofs += len;
+                    } else {
+                        /* interframe pixel copy */
+                        if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
+                            return;
+                        memcpy(&dp[ofs], &pp[ofs], len + 1);
+                        ofs += len + 1;
+                    }
+                } while (ofs < frame_width);
+                if (ofs > frame_width) {
+                    av_log(s->avctx, AV_LOG_ERROR, "offset > width (%d > %d)\n",
+                        ofs, frame_width);
+                    break;
+                }
+                dp += frame->linesize[0];
+                pp += s->prev_frame.linesize[0];
+            }
+            break;
+
+        case 2:
+            for (i = 0; i < frame_height; i++) {
+                if (pb_end -pb < frame_width)
+                    return;
+                memcpy(dp, pb, frame_width);
+                pb += frame_width;
+                dp += frame->linesize[0];
+                pp += s->prev_frame.linesize[0];
+            }
+            break;
+
+        case 3:
+            for (i = 0; i < frame_height; i++) {
+                ofs = 0;
+                do {
+                    if (pb_end - pb < 1)
+                        return;
+                    len = *pb++;
+                    if (len & 0x80) {
+                        len = (len & 0x7F) + 1;
+                        if (pb_end - pb < 1)
+                            return;
+                        if (*pb++ == 0xFF)
+                            len = rle_unpack(pb, pb_end - pb, len, &dp[ofs], frame_width - ofs);
+                        else {
+                        if (pb_end - pb < len)
+                            return;
+                            memcpy(&dp[ofs], pb, len);
+                        }
+                        pb += len;
+                        ofs += len;
+                    } else {
+                        /* interframe pixel copy */
+                        if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
+                            return;
+                        memcpy(&dp[ofs], &pp[ofs], len + 1);
+                        ofs += len + 1;
+                    }
+                } while (ofs < frame_width);
+                if (ofs > frame_width) {
+                    av_log(s->avctx, AV_LOG_ERROR, "offset > width (%d > %d)\n",
+                        ofs, frame_width);
+                }
+                dp += frame->linesize[0];
+                pp += s->prev_frame.linesize[0];
+            }
+            break;
+        }
+    }
+}
+
+static av_cold int vmdvideo_decode_init(AVCodecContext *avctx)
+{
+    VmdVideoContext *s = avctx->priv_data;
+    int i;
+    unsigned int *palette32;
+    int palette_index = 0;
+    unsigned char r, g, b;
+    unsigned char *vmd_header;
+    unsigned char *raw_palette;
+
+    s->avctx = avctx;
+    avctx->pix_fmt = AV_PIX_FMT_PAL8;
+
+    /* make sure the VMD header made it */
+    if (s->avctx->extradata_size != VMD_HEADER_SIZE) {
+        av_log(s->avctx, AV_LOG_ERROR, "expected extradata size of %d\n",
+            VMD_HEADER_SIZE);
+        return -1;
+    }
+    vmd_header = (unsigned char *)avctx->extradata;
+
+    s->unpack_buffer_size = AV_RL32(&vmd_header[800]);
+    s->unpack_buffer = av_malloc(s->unpack_buffer_size);
+    if (!s->unpack_buffer)
+        return -1;
+
+    /* load up the initial palette */
+    raw_palette = &vmd_header[28];
+    palette32 = (unsigned int *)s->palette;
+    for (i = 0; i < PALETTE_COUNT; i++) {
+        r = raw_palette[palette_index++] * 4;
+        g = raw_palette[palette_index++] * 4;
+        b = raw_palette[palette_index++] * 4;
+        palette32[i] = (r << 16) | (g << 8) | (b);
+    }
+
+    avcodec_get_frame_defaults(&s->prev_frame);
+
+    return 0;
+}
+
+static int vmdvideo_decode_frame(AVCodecContext *avctx,
+                                 void *data, int *got_frame,
+                                 AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    VmdVideoContext *s = avctx->priv_data;
+    AVFrame *frame = data;
+    int ret;
+
+    s->buf = buf;
+    s->size = buf_size;
+
+    if (buf_size < 16)
+        return buf_size;
+
+    if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
+        return ret;
+
+    vmd_decode(s, frame);
+
+    /* make the palette available on the way out */
+    memcpy(frame->data[1], s->palette, PALETTE_COUNT * 4);
+
+    /* shuffle frames */
+    av_frame_unref(&s->prev_frame);
+    if ((ret = av_frame_ref(&s->prev_frame, frame)) < 0)
+        return ret;
+
+    *got_frame      = 1;
+
+    /* report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static av_cold int vmdvideo_decode_end(AVCodecContext *avctx)
+{
+    VmdVideoContext *s = avctx->priv_data;
+
+    av_frame_unref(&s->prev_frame);
+    av_free(s->unpack_buffer);
+
+    return 0;
+}
+
+
+/*
+ * Audio Decoder
+ */
+
+#define BLOCK_TYPE_AUDIO    1
+#define BLOCK_TYPE_INITIAL  2
+#define BLOCK_TYPE_SILENCE  3
+
+typedef struct VmdAudioContext {
+    int out_bps;
+    int chunk_size;
+} VmdAudioContext;
+
+static const uint16_t vmdaudio_table[128] = {
+    0x000, 0x008, 0x010, 0x020, 0x030, 0x040, 0x050, 0x060, 0x070, 0x080,
+    0x090, 0x0A0, 0x0B0, 0x0C0, 0x0D0, 0x0E0, 0x0F0, 0x100, 0x110, 0x120,
+    0x130, 0x140, 0x150, 0x160, 0x170, 0x180, 0x190, 0x1A0, 0x1B0, 0x1C0,
+    0x1D0, 0x1E0, 0x1F0, 0x200, 0x208, 0x210, 0x218, 0x220, 0x228, 0x230,
+    0x238, 0x240, 0x248, 0x250, 0x258, 0x260, 0x268, 0x270, 0x278, 0x280,
+    0x288, 0x290, 0x298, 0x2A0, 0x2A8, 0x2B0, 0x2B8, 0x2C0, 0x2C8, 0x2D0,
+    0x2D8, 0x2E0, 0x2E8, 0x2F0, 0x2F8, 0x300, 0x308, 0x310, 0x318, 0x320,
+    0x328, 0x330, 0x338, 0x340, 0x348, 0x350, 0x358, 0x360, 0x368, 0x370,
+    0x378, 0x380, 0x388, 0x390, 0x398, 0x3A0, 0x3A8, 0x3B0, 0x3B8, 0x3C0,
+    0x3C8, 0x3D0, 0x3D8, 0x3E0, 0x3E8, 0x3F0, 0x3F8, 0x400, 0x440, 0x480,
+    0x4C0, 0x500, 0x540, 0x580, 0x5C0, 0x600, 0x640, 0x680, 0x6C0, 0x700,
+    0x740, 0x780, 0x7C0, 0x800, 0x900, 0xA00, 0xB00, 0xC00, 0xD00, 0xE00,
+    0xF00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x2000, 0x3000, 0x4000
+};
+
+static av_cold int vmdaudio_decode_init(AVCodecContext *avctx)
+{
+    VmdAudioContext *s = avctx->priv_data;
+
+    if (avctx->channels < 1 || avctx->channels > 2) {
+        av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
+        return AVERROR(EINVAL);
+    }
+    if (avctx->block_align < 1 || avctx->block_align % avctx->channels) {
+        av_log(avctx, AV_LOG_ERROR, "invalid block align\n");
+        return AVERROR(EINVAL);
+    }
+
+    avctx->channel_layout = avctx->channels == 1 ? AV_CH_LAYOUT_MONO :
+                                                   AV_CH_LAYOUT_STEREO;
+
+    if (avctx->bits_per_coded_sample == 16)
+        avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+    else
+        avctx->sample_fmt = AV_SAMPLE_FMT_U8;
+    s->out_bps = av_get_bytes_per_sample(avctx->sample_fmt);
+
+    s->chunk_size = avctx->block_align + avctx->channels * (s->out_bps == 2);
+
+    av_log(avctx, AV_LOG_DEBUG, "%d channels, %d bits/sample, "
+           "block align = %d, sample rate = %d\n",
+           avctx->channels, avctx->bits_per_coded_sample, avctx->block_align,
+           avctx->sample_rate);
+
+    return 0;
+}
+
+static void decode_audio_s16(int16_t *out, const uint8_t *buf, int buf_size,
+                             int channels)
+{
+    int ch;
+    const uint8_t *buf_end = buf + buf_size;
+    int predictor[2];
+    int st = channels - 1;
+
+    /* decode initial raw sample */
+    for (ch = 0; ch < channels; ch++) {
+        predictor[ch] = (int16_t)AV_RL16(buf);
+        buf += 2;
+        *out++ = predictor[ch];
+    }
+
+    /* decode DPCM samples */
+    ch = 0;
+    while (buf < buf_end) {
+        uint8_t b = *buf++;
+        if (b & 0x80)
+            predictor[ch] -= vmdaudio_table[b & 0x7F];
+        else
+            predictor[ch] += vmdaudio_table[b];
+        predictor[ch] = av_clip_int16(predictor[ch]);
+        *out++ = predictor[ch];
+        ch ^= st;
+    }
+}
+
+static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data,
+                                 int *got_frame_ptr, AVPacket *avpkt)
+{
+    AVFrame *frame     = data;
+    const uint8_t *buf = avpkt->data;
+    const uint8_t *buf_end;
+    int buf_size = avpkt->size;
+    VmdAudioContext *s = avctx->priv_data;
+    int block_type, silent_chunks, audio_chunks;
+    int ret;
+    uint8_t *output_samples_u8;
+    int16_t *output_samples_s16;
+
+    if (buf_size < 16) {
+        av_log(avctx, AV_LOG_WARNING, "skipping small junk packet\n");
+        *got_frame_ptr = 0;
+        return buf_size;
+    }
+
+    block_type = buf[6];
+    if (block_type < BLOCK_TYPE_AUDIO || block_type > BLOCK_TYPE_SILENCE) {
+        av_log(avctx, AV_LOG_ERROR, "unknown block type: %d\n", block_type);
+        return AVERROR(EINVAL);
+    }
+    buf      += 16;
+    buf_size -= 16;
+
+    /* get number of silent chunks */
+    silent_chunks = 0;
+    if (block_type == BLOCK_TYPE_INITIAL) {
+        uint32_t flags;
+        if (buf_size < 4) {
+            av_log(avctx, AV_LOG_ERROR, "packet is too small\n");
+            return AVERROR(EINVAL);
+        }
+        flags         = AV_RB32(buf);
+        silent_chunks = av_popcount(flags);
+        buf      += 4;
+        buf_size -= 4;
+    } else if (block_type == BLOCK_TYPE_SILENCE) {
+        silent_chunks = 1;
+        buf_size = 0; // should already be zero but set it just to be sure
+    }
+
+    /* ensure output buffer is large enough */
+    audio_chunks = buf_size / s->chunk_size;
+
+    /* get output buffer */
+    frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) /
+                        avctx->channels;
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+        return ret;
+    output_samples_u8  =            frame->data[0];
+    output_samples_s16 = (int16_t *)frame->data[0];
+
+    /* decode silent chunks */
+    if (silent_chunks > 0) {
+        int silent_size = avctx->block_align * silent_chunks;
+        if (s->out_bps == 2) {
+            memset(output_samples_s16, 0x00, silent_size * 2);
+            output_samples_s16 += silent_size;
+        } else {
+            memset(output_samples_u8,  0x80, silent_size);
+            output_samples_u8 += silent_size;
+        }
+    }
+
+    /* decode audio chunks */
+    if (audio_chunks > 0) {
+        buf_end = buf + buf_size;
+        while (buf_end - buf >= s->chunk_size) {
+            if (s->out_bps == 2) {
+                decode_audio_s16(output_samples_s16, buf, s->chunk_size,
+                                 avctx->channels);
+                output_samples_s16 += avctx->block_align;
+            } else {
+                memcpy(output_samples_u8, buf, s->chunk_size);
+                output_samples_u8  += avctx->block_align;
+            }
+            buf += s->chunk_size;
+        }
+    }
+
+    *got_frame_ptr = 1;
+
+    return avpkt->size;
+}
+
+
+/*
+ * Public Data Structures
+ */
+
+AVCodec ff_vmdvideo_decoder = {
+    .name           = "vmdvideo",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_VMDVIDEO,
+    .priv_data_size = sizeof(VmdVideoContext),
+    .init           = vmdvideo_decode_init,
+    .close          = vmdvideo_decode_end,
+    .decode         = vmdvideo_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("Sierra VMD video"),
+};
+
+AVCodec ff_vmdaudio_decoder = {
+    .name           = "vmdaudio",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_VMDAUDIO,
+    .priv_data_size = sizeof(VmdAudioContext),
+    .init           = vmdaudio_decode_init,
+    .decode         = vmdaudio_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("Sierra VMD audio"),
+};