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ext/ffmpeg/gstffmpegdec.c: Include optional parser if supported (currently only MPEG-1/-2 video). This fixes playback...

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Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_init),
(gst_ffmpegdec_close), (gst_ffmpegdec_open), (gst_ffmpegdec_chain):
Include optional parser if supported (currently only MPEG-1/-2
video). This fixes playback of MPEG-1/-2 videos using
ffdec_mpeg2video.
This commit is contained in:
Ronald S. Bultje 2004-12-17 13:08:13 +00:00
parent 67927465e6
commit 52ed38c1a4
2 changed files with 85 additions and 21 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2004-12-17 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_init),
(gst_ffmpegdec_close), (gst_ffmpegdec_open), (gst_ffmpegdec_chain):
Include optional parser if supported (currently only MPEG-1/-2
video). This fixes playback of MPEG-1/-2 videos using
ffdec_mpeg2video.
2004-12-17 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/ffmpeg/gstffmpegenc.c: (gst_ffmpegenc_base_init),

98
ext/ffmpeg/gstffmpegdec.c
View file

@ -44,10 +44,15 @@ struct _GstFFMpegDec
GstPad *srcpad;
GstPad *sinkpad;
/* decoding */
AVCodecContext *context;
AVFrame *picture;
gboolean opened;
/* parsing */
AVCodecParserContext *pctx;
GstBuffer *pcache;
GValue *par; /* pixel aspect ratio of incoming data */
};
@ -196,6 +201,9 @@ gst_ffmpegdec_init (GstFFMpegDec * ffmpegdec)
ffmpegdec->context = avcodec_alloc_context ();
ffmpegdec->picture = avcodec_alloc_frame ();
ffmpegdec->pctx = NULL;
ffmpegdec->pcache = NULL;
ffmpegdec->par = NULL;
ffmpegdec->opened = FALSE;
}
@ -238,6 +246,15 @@ gst_ffmpegdec_close (GstFFMpegDec *ffmpegdec)
av_free (ffmpegdec->context->extradata);
ffmpegdec->context->extradata = NULL;
}
if (ffmpegdec->pctx) {
if (ffmpegdec->pcache) {
gst_buffer_unref (ffmpegdec->pcache);
ffmpegdec->pcache = NULL;
}
av_parser_close (ffmpegdec->pctx);
ffmpegdec->pctx = NULL;
}
}
static gboolean
@ -254,6 +271,10 @@ gst_ffmpegdec_open (GstFFMpegDec *ffmpegdec)
return FALSE;
}
/* open a parser if we can - exclude mpeg4 for now... */
if (oclass->in_plugin->id != CODEC_ID_MPEG4)
ffmpegdec->pctx = av_parser_init (oclass->in_plugin->id);
return TRUE;
}
@ -429,8 +450,8 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
GstFFMpegDec *ffmpegdec = (GstFFMpegDec *) (gst_pad_get_parent (pad));
GstFFMpegDecClass *oclass =
(GstFFMpegDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
guchar *data;
gint size, len = 0;
guint8 *bdata, *data;
gint bsize, size, len = 0;
gint have_data;
guint64 expected_ts = GST_BUFFER_TIMESTAMP (inbuf);
@ -446,25 +467,55 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
* (avcodec_flush_buffers ()))
*/
data = GST_BUFFER_DATA (inbuf);
size = GST_BUFFER_SIZE (inbuf);
/* parse cache joining */
if (ffmpegdec->pcache) {
inbuf = gst_buffer_join (ffmpegdec->pcache, inbuf);
ffmpegdec->pcache = NULL;
bdata = GST_BUFFER_DATA (inbuf);
bsize = GST_BUFFER_SIZE (inbuf);
}
/* workarounds, functions write to buffers:
* libavcodec/svq1.c:svq1_decode_frame writes to the given buffer.
* libavcodec/svq3.c:svq3_decode_slice_header too.
* ffmpeg devs know about it and will fix it (they said). */
else if (oclass->in_plugin->id == CODEC_ID_SVQ1 ||
oclass->in_plugin->id == CODEC_ID_SVQ3) {
inbuf = gst_buffer_copy_on_write (inbuf);
bdata = GST_BUFFER_DATA (inbuf);
bsize = GST_BUFFER_SIZE (inbuf);
} else {
bdata = GST_BUFFER_DATA (inbuf);
bsize = GST_BUFFER_SIZE (inbuf);
}
do {
/* parse, if at all possible */
if (ffmpegdec->pctx) {
gint res;
res = av_parser_parse (ffmpegdec->pctx, ffmpegdec->context,
&data, &size, bdata, bsize,
expected_ts / (GST_SECOND / AV_TIME_BASE),
expected_ts / (GST_SECOND / AV_TIME_BASE));
if (res == 0)
break;
else if (size == 0) {
bsize = 0;
break;
} else {
bsize -= res;
bdata += res;
}
} else {
data = bdata;
size = bsize;
}
ffmpegdec->context->frame_number++;
switch (oclass->in_plugin->type) {
case CODEC_TYPE_VIDEO:
/* workarounds, functions write to buffers:
* libavcodec/svq1.c:svq1_decode_frame writes to the given buffer.
* libavcodec/svq3.c:svq3_decode_slice_header too.
* ffmpeg devs know about it and will fix it (they said). */
if (oclass->in_plugin->id == CODEC_ID_SVQ1 ||
oclass->in_plugin->id == CODEC_ID_SVQ3) {
inbuf = gst_buffer_copy_on_write (inbuf);
data = GST_BUFFER_DATA (inbuf);
size = GST_BUFFER_SIZE (inbuf);
}
len = avcodec_decode_video (ffmpegdec->context,
ffmpegdec->picture, &have_data, data, size);
@ -473,10 +524,10 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
* errors inside. This drives me crazy, so we let it allocate
* it's own buffers and copy to our own buffer afterwards... */
AVPicture pic;
gint size = gst_ffmpeg_avpicture_get_size (ffmpegdec->context->pix_fmt,
gint fsize = gst_ffmpeg_avpicture_get_size (ffmpegdec->context->pix_fmt,
ffmpegdec->context->width, ffmpegdec->context->height);
outbuf = gst_buffer_new_and_alloc (size);
outbuf = gst_buffer_new_and_alloc (fsize);
/* original ffmpeg code does not handle odd sizes correctly. This patched
* up version does */
gst_ffmpeg_avpicture_fill (&pic, GST_BUFFER_DATA (outbuf),
@ -499,7 +550,6 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
GST_BUFFER_DURATION (outbuf) = GST_SECOND *
ffmpegdec->context->frame_rate_base /
ffmpegdec->context->frame_rate;
expected_ts += GST_BUFFER_DURATION (outbuf);
} else {
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (inbuf);
}
@ -556,10 +606,16 @@ gst_ffmpegdec_chain (GstPad * pad, GstData * _data)
gst_buffer_unref (outbuf);
}
size -= len;
data += len;
} while (size > 0);
if (!ffmpegdec->pctx) {
bsize -= len;
bdata += len;
}
} while (bsize > 0);
if (ffmpegdec->pctx && bsize > 0) {
ffmpegdec->pcache = gst_buffer_create_sub (inbuf,
GST_BUFFER_SIZE (inbuf) - bsize, bsize);
}
gst_buffer_unref (inbuf);
}