making act segmenter

1 files changed, 581 insertions, 0 deletions

diff --git a/ffmpeg/libavfilter/buffersrc.c b/ffmpeg/libavfilter/buffersrc.c
new file mode 100644
index 0000000..cc650ff
--- /dev/null
+++ b/ffmpeg/libavfilter/buffersrc.c
@@ -0,0 +1,581 @@
+/*
+ * Copyright (c) 2008 Vitor Sessak
+ *
+ * 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
+ * memory buffer source filter
+ */
+
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/fifo.h"
+#include "libavutil/frame.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/samplefmt.h"
+#include "audio.h"
+#include "avfilter.h"
+#include "buffersrc.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+#include "avcodec.h"
+
+typedef struct {
+    const AVClass    *class;
+    AVFifoBuffer     *fifo;
+    AVRational        time_base;     ///< time_base to set in the output link
+    AVRational        frame_rate;    ///< frame_rate to set in the output link
+    unsigned          nb_failed_requests;
+    unsigned          warning_limit;
+
+    /* video only */
+    int               w, h;
+    enum AVPixelFormat  pix_fmt;
+    AVRational        pixel_aspect;
+    char              *sws_param;
+
+    /* audio only */
+    int sample_rate;
+    enum AVSampleFormat sample_fmt;
+    char               *sample_fmt_str;
+    int channels;
+    uint64_t channel_layout;
+    char    *channel_layout_str;
+
+    int eof;
+} BufferSourceContext;
+
+#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\
+    if (c->w != width || c->h != height || c->pix_fmt != format) {\
+        av_log(s, AV_LOG_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\
+    }
+
+#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format)\
+    if (c->sample_fmt != format || c->sample_rate != srate ||\
+        c->channel_layout != ch_layout || c->channels != ch_count) {\
+        av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
+        return AVERROR(EINVAL);\
+    }
+
+int av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
+{
+    return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
+                                        AV_BUFFERSRC_FLAG_KEEP_REF);
+}
+
+int av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
+{
+    return av_buffersrc_add_frame_flags(ctx, frame, 0);
+}
+
+static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
+                                           AVFrame *frame, int flags);
+
+int av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
+{
+    AVFrame *copy = NULL;
+    int ret = 0;
+
+    if (frame && frame->channel_layout &&
+        av_get_channel_layout_nb_channels(frame->channel_layout) != av_frame_get_channels(frame)) {
+        av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame)
+        return av_buffersrc_add_frame_internal(ctx, frame, flags);
+
+    if (!(copy = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    ret = av_frame_ref(copy, frame);
+    if (ret >= 0)
+        ret = av_buffersrc_add_frame_internal(ctx, copy, flags);
+
+    av_frame_free(&copy);
+    return ret;
+}
+
+static int attribute_align_arg av_buffersrc_add_frame_internal(AVFilterContext *ctx,
+                                                               AVFrame *frame, int flags)
+{
+    BufferSourceContext *s = ctx->priv;
+    AVFrame *copy;
+    int ret;
+
+    if (!frame) {
+        s->eof = 1;
+        return 0;
+    } else if (s->eof)
+        return AVERROR(EINVAL);
+
+    if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
+
+    switch (ctx->outputs[0]->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
+                                 frame->format);
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        /* For layouts unknown on input but known on link after negotiation. */
+        if (!frame->channel_layout)
+            frame->channel_layout = s->channel_layout;
+        CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
+                                 av_frame_get_channels(frame), frame->format);
+        break;
+    default:
+        return AVERROR(EINVAL);
+    }
+
+    }
+
+    if (!av_fifo_space(s->fifo) &&
+        (ret = av_fifo_realloc2(s->fifo, av_fifo_size(s->fifo) +
+                                         sizeof(copy))) < 0)
+        return ret;
+
+    if (!(copy = av_frame_alloc()))
+        return AVERROR(ENOMEM);
+    av_frame_move_ref(copy, frame);
+
+    if ((ret = av_fifo_generic_write(s->fifo, &copy, sizeof(copy), NULL)) < 0) {
+        av_frame_move_ref(frame, copy);
+        av_frame_free(&copy);
+        return ret;
+    }
+
+    if ((flags & AV_BUFFERSRC_FLAG_PUSH))
+        if ((ret = ctx->output_pads[0].request_frame(ctx->outputs[0])) < 0)
+            return ret;
+
+    return 0;
+}
+
+#if FF_API_AVFILTERBUFFER
+static void compat_free_buffer(void *opaque, uint8_t *data)
+{
+    AVFilterBufferRef *buf = opaque;
+    AV_NOWARN_DEPRECATED(
+    avfilter_unref_buffer(buf);
+    )
+}
+
+static void compat_unref_buffer(void *opaque, uint8_t *data)
+{
+    AVBufferRef *buf = opaque;
+    AV_NOWARN_DEPRECATED(
+    av_buffer_unref(&buf);
+    )
+}
+
+int av_buffersrc_add_ref(AVFilterContext *ctx, AVFilterBufferRef *buf,
+                         int flags)
+{
+    BufferSourceContext *s = ctx->priv;
+    AVFrame *frame = NULL;
+    AVBufferRef *dummy_buf = NULL;
+    int ret = 0, planes, i;
+
+    if (!buf) {
+        s->eof = 1;
+        return 0;
+    } else if (s->eof)
+        return AVERROR(EINVAL);
+
+    frame = av_frame_alloc();
+    if (!frame)
+        return AVERROR(ENOMEM);
+
+    dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, buf,
+                                 (buf->perms & AV_PERM_WRITE) ? 0 : AV_BUFFER_FLAG_READONLY);
+    if (!dummy_buf) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    AV_NOWARN_DEPRECATED(
+    if ((ret = avfilter_copy_buf_props(frame, buf)) < 0)
+        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_unref_buffer,    \
+                               dummy_ref, (buf->perms & AV_PERM_WRITE) ? 0 : AV_BUFFER_FLAG_READONLY);                           \
+    if (!ref_out) {                                                     \
+        av_frame_unref(frame);                                          \
+        ret = AVERROR(ENOMEM);                                          \
+        goto fail;                                                      \
+    }                                                                   \
+} while (0)
+
+    if (ctx->outputs[0]->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);
+        int channels = av_get_channel_layout_nb_channels(frame->channel_layout);
+
+        planes = planar ? channels : 1;
+
+        if (planes > FF_ARRAY_ELEMS(frame->buf)) {
+            frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
+            frame->extended_buf = av_mallocz(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 < planes - FF_ARRAY_ELEMS(frame->buf); i++)
+            WRAP_PLANE(frame->extended_buf[i],
+                       frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
+                       frame->linesize[0]);
+    }
+
+    ret = av_buffersrc_add_frame_flags(ctx, frame, flags);
+
+fail:
+    av_buffer_unref(&dummy_buf);
+    av_frame_free(&frame);
+
+    return ret;
+}
+
+int av_buffersrc_buffer(AVFilterContext *ctx, AVFilterBufferRef *buf)
+{
+    return av_buffersrc_add_ref(ctx, buf, 0);
+}
+#endif
+
+#define OFFSET(x) offsetof(BufferSourceContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption buffer_options[] = {
+    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL,   { .dbl = 0 }, 0, INT_MAX, FLAGS },
+    { "frame_rate",     NULL, OFFSET(frame_rate),          AV_OPT_TYPE_RATIONAL,   { .dbl = 0 }, 0, INT_MAX, FLAGS },
+    { "video_size",     NULL, OFFSET(w),                   AV_OPT_TYPE_IMAGE_SIZE, .flags = FLAGS },
+    { "pix_fmt",        NULL, OFFSET(pix_fmt),             AV_OPT_TYPE_PIXEL_FMT,  .flags = FLAGS },
+    { "pixel_aspect",   NULL, OFFSET(pixel_aspect),        AV_OPT_TYPE_RATIONAL,   { .dbl = 0 }, 0, INT_MAX, FLAGS },
+    { "sws_param",      NULL, OFFSET(sws_param),           AV_OPT_TYPE_STRING,     .flags = FLAGS },
+    { NULL },
+};
+#undef FLAGS
+
+AVFILTER_DEFINE_CLASS(buffer);
+
+static av_cold int init_video(AVFilterContext *ctx, const char *args)
+{
+    BufferSourceContext *c = ctx->priv;
+    char pix_fmt_str[128], *colon, *equal;
+    int ret, n = 0;
+
+    c->class = &buffer_class;
+
+    if (!args) {
+        av_log(ctx, AV_LOG_ERROR, "Arguments required\n");
+        return AVERROR(EINVAL);
+    }
+
+    colon = strchr(args, ':');
+    equal = strchr(args, '=');
+    if (equal && (!colon || equal < colon)) {
+        av_opt_set_defaults(c);
+        ret = av_set_options_string(c, args, "=", ":");
+        if (ret < 0)
+            goto fail;
+    } else {
+    if (!args ||
+        (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d", &c->w, &c->h, pix_fmt_str,
+                    &c->time_base.num, &c->time_base.den,
+                    &c->pixel_aspect.num, &c->pixel_aspect.den)) != 7) {
+        av_log(ctx, AV_LOG_ERROR, "Expected 7 arguments, but %d found in '%s'\n", n, args);
+        return AVERROR(EINVAL);
+    }
+    if ((c->pix_fmt = av_get_pix_fmt(pix_fmt_str)) == AV_PIX_FMT_NONE) {
+        char *tail;
+        c->pix_fmt = strtol(pix_fmt_str, &tail, 10);
+        if (*tail || c->pix_fmt < 0 || c->pix_fmt >= AV_PIX_FMT_NB) {
+            av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", pix_fmt_str);
+            return AVERROR(EINVAL);
+        }
+    }
+    }
+
+    if (!(c->fifo = av_fifo_alloc(sizeof(AVFrame*))))
+        return AVERROR(ENOMEM);
+
+    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d sws_param:%s\n",
+           c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
+           c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
+           c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, ""));
+    c->warning_limit = 100;
+    return 0;
+
+fail:
+    av_opt_free(c);
+    return ret;
+}
+
+unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
+{
+    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
+}
+
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
+static const AVOption abuffer_options[] = {
+    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
+    { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, FLAGS },
+    { "sample_fmt",     NULL, OFFSET(sample_fmt_str),      AV_OPT_TYPE_STRING, .flags = FLAGS },
+    { "channels",       NULL, OFFSET(channels),            AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, FLAGS },
+    { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING, .flags = FLAGS },
+    { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(abuffer);
+
+static av_cold int init_audio(AVFilterContext *ctx, const char *args)
+{
+    BufferSourceContext *s = ctx->priv;
+    int ret = 0;
+
+    s->class = &abuffer_class;
+    av_opt_set_defaults(s);
+
+    if ((ret = av_set_options_string(s, args, "=", ":")) < 0)
+        goto fail;
+
+    s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str);
+    if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
+        av_log(ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n",
+               s->sample_fmt_str);
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    if (s->channel_layout_str) {
+        int n;
+        /* TODO reindent */
+    s->channel_layout = av_get_channel_layout(s->channel_layout_str);
+    if (!s->channel_layout) {
+        av_log(ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n",
+               s->channel_layout_str);
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+        n = av_get_channel_layout_nb_channels(s->channel_layout);
+        if (s->channels) {
+            if (n != s->channels) {
+                av_log(ctx, AV_LOG_ERROR,
+                       "Mismatching channel count %d and layout '%s' "
+                       "(%d channels)\n",
+                       s->channels, s->channel_layout_str, n);
+                ret = AVERROR(EINVAL);
+                goto fail;
+            }
+        }
+        s->channels = n;
+    } else if (!s->channels) {
+        av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
+                                  "channel layout specified\n");
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+
+    if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*)))) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    if (!s->time_base.num)
+        s->time_base = (AVRational){1, s->sample_rate};
+
+    av_log(ctx, AV_LOG_VERBOSE,
+           "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
+           s->time_base.num, s->time_base.den, s->sample_fmt_str,
+           s->sample_rate, s->channel_layout_str);
+    s->warning_limit = 100;
+
+fail:
+    av_opt_free(s);
+    return ret;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+    BufferSourceContext *s = ctx->priv;
+    while (s->fifo && av_fifo_size(s->fifo)) {
+        AVFrame *frame;
+        av_fifo_generic_read(s->fifo, &frame, sizeof(frame), NULL);
+        av_frame_free(&frame);
+    }
+    av_fifo_free(s->fifo);
+    s->fifo = NULL;
+    av_freep(&s->sws_param);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+    BufferSourceContext *c = ctx->priv;
+    AVFilterChannelLayouts *channel_layouts = NULL;
+    AVFilterFormats *formats = NULL;
+    AVFilterFormats *samplerates = NULL;
+
+    switch (ctx->outputs[0]->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        ff_add_format(&formats, c->pix_fmt);
+        ff_set_common_formats(ctx, formats);
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        ff_add_format(&formats,           c->sample_fmt);
+        ff_set_common_formats(ctx, formats);
+
+        ff_add_format(&samplerates,       c->sample_rate);
+        ff_set_common_samplerates(ctx, samplerates);
+
+        ff_add_channel_layout(&channel_layouts,
+                              c->channel_layout ? c->channel_layout :
+                              FF_COUNT2LAYOUT(c->channels));
+        ff_set_common_channel_layouts(ctx, channel_layouts);
+        break;
+    default:
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+static int config_props(AVFilterLink *link)
+{
+    BufferSourceContext *c = link->src->priv;
+
+    switch (link->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        link->w = c->w;
+        link->h = c->h;
+        link->sample_aspect_ratio = c->pixel_aspect;
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        if (!c->channel_layout)
+            c->channel_layout = link->channel_layout;
+        break;
+    default:
+        return AVERROR(EINVAL);
+    }
+
+    link->time_base = c->time_base;
+    link->frame_rate = c->frame_rate;
+    return 0;
+}
+
+static int request_frame(AVFilterLink *link)
+{
+    BufferSourceContext *c = link->src->priv;
+    AVFrame *frame;
+
+    if (!av_fifo_size(c->fifo)) {
+        if (c->eof)
+            return AVERROR_EOF;
+        c->nb_failed_requests++;
+        return AVERROR(EAGAIN);
+    }
+    av_fifo_generic_read(c->fifo, &frame, sizeof(frame), NULL);
+
+    return ff_filter_frame(link, frame);
+}
+
+static int poll_frame(AVFilterLink *link)
+{
+    BufferSourceContext *c = link->src->priv;
+    int size = av_fifo_size(c->fifo);
+    if (!size && c->eof)
+        return AVERROR_EOF;
+    return size/sizeof(AVFrame*);
+}
+
+static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .request_frame = request_frame,
+        .poll_frame    = poll_frame,
+        .config_props  = config_props,
+    },
+    { NULL }
+};
+
+AVFilter avfilter_vsrc_buffer = {
+    .name      = "buffer",
+    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
+    .priv_size = sizeof(BufferSourceContext),
+    .query_formats = query_formats,
+
+    .init      = init_video,
+    .uninit    = uninit,
+
+    .inputs    = NULL,
+    .outputs   = avfilter_vsrc_buffer_outputs,
+    .priv_class = &buffer_class,
+};
+
+static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_AUDIO,
+        .request_frame = request_frame,
+        .poll_frame    = poll_frame,
+        .config_props  = config_props,
+    },
+    { NULL }
+};
+
+AVFilter avfilter_asrc_abuffer = {
+    .name          = "abuffer",
+    .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
+    .priv_size     = sizeof(BufferSourceContext),
+    .query_formats = query_formats,
+
+    .init      = init_audio,
+    .uninit    = uninit,
+
+    .inputs    = NULL,
+    .outputs   = avfilter_asrc_abuffer_outputs,
+    .priv_class = &abuffer_class,
+};