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ext/ffmpeg/gstffmpegdec.c: Fix timestamping some more by actually using the ffmpeg parsers correctly. Fixes #341736

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Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_chain):
Fix timestamping some more by actually using the ffmpeg parsers
correctly. Fixes #341736
This commit is contained in:
Wim Taymans 2006-09-05 15:34:00 +00:00
parent bb45e68275
commit f08033c5a7
2 changed files with 60 additions and 52 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2006-09-05 Wim Taymans <wim@fluendo.com>
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_chain):
Fix timestamping some more by actually using the ffmpeg parsers
correctly. Fixes #341736
2006-08-29 Wim Taymans <wim@fluendo.com>
* ext/ffmpeg/gstffmpegdec.c: (gst_ffmpegdec_open),

106
ext/ffmpeg/gstffmpegdec.c
View file

@ -1753,21 +1753,18 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
{
GstFFMpegDec *ffmpegdec;
GstFFMpegDecClass *oclass;
guint8 *bdata, *data;
gint bsize, size, len, have_data;
guint8 *data, *bdata;
gint size, bsize, len, have_data;
guint64 in_ts;
GstFlowReturn ret = GST_FLOW_OK;
guint left;
GstClockTime timestamp;
ffmpegdec = (GstFFMpegDec *) (GST_PAD_PARENT (pad));
if (G_UNLIKELY (!ffmpegdec->opened))
goto not_negotiated;
in_ts = GST_BUFFER_TIMESTAMP (inbuf);
GST_DEBUG_OBJECT (ffmpegdec, "chain, ts: %" GST_TIME_FORMAT,
GST_TIME_ARGS (in_ts));
/* The discont flags marks a buffer that is not continuous with the previous
* buffer. This means we need to clear whatever data we currently have. We
* currently also wait for a new keyframe, which might be suboptimal in the
@ -1791,6 +1788,8 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
ffmpegdec->waiting_for_key = FALSE;
}
in_ts = GST_BUFFER_TIMESTAMP (inbuf);
GST_LOG_OBJECT (ffmpegdec,
"Received new data of size %d, time %" GST_TIME_FORMAT " next_ts %"
GST_TIME_FORMAT, GST_BUFFER_SIZE (inbuf),
@ -1798,40 +1797,34 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
oclass = (GstFFMpegDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
/* parse cache joining */
/* parse cache joining. If there is cached data, its timestamp will be what we
* send to the parse. */
if (ffmpegdec->pcache) {
GstClockTime timestamp;
GstClockTime duration;
timestamp = GST_BUFFER_TIMESTAMP (ffmpegdec->pcache);
if (GST_BUFFER_DURATION_IS_VALID (ffmpegdec->pcache)
&& GST_BUFFER_DURATION_IS_VALID (inbuf))
duration = GST_BUFFER_DURATION (ffmpegdec->pcache) +
GST_BUFFER_DURATION (inbuf);
else
duration = GST_CLOCK_TIME_NONE;
/* keep track of how many bytes to consume before we can use the incomming
* timestamp. */
left = GST_BUFFER_SIZE (ffmpegdec->pcache);
/* join with previous data */
inbuf = gst_buffer_join (ffmpegdec->pcache, inbuf);
/* update time info as appropriate */
GST_BUFFER_TIMESTAMP (inbuf) = timestamp;
GST_BUFFER_DURATION (inbuf) = duration;
timestamp = GST_BUFFER_TIMESTAMP (inbuf);
GST_LOG_OBJECT (ffmpegdec,
"joined parse cache, inbuf now has ts %" GST_TIME_FORMAT
" and duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
"joined parse cache, inbuf now has ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
/* no more cached data, we assume we can consume the complete cache */
ffmpegdec->pcache = NULL;
in_ts = timestamp;
}
else {
/* no cache, input timestamp matches the buffer we try to decode */
timestamp = in_ts;
left = 0;
}
/* 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 ||
if (oclass->in_plugin->id == CODEC_ID_SVQ1 ||
oclass->in_plugin->id == CODEC_ID_SVQ3) {
inbuf = gst_buffer_make_writable (inbuf);
}
@ -1840,7 +1833,6 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
bsize = GST_BUFFER_SIZE (inbuf);
do {
GST_LOG_OBJECT (ffmpegdec, "bdata:%p , bsize:%d", bdata, bsize);
/* parse, if at all possible */
if (ffmpegdec->pctx) {
gint res;
@ -1848,32 +1840,45 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
GST_LOG_OBJECT (ffmpegdec,
"Calling av_parser_parse with ts:%" GST_TIME_FORMAT,
GST_TIME_ARGS (in_ts));
GST_TIME_ARGS (timestamp));
/* convert timestamp to ffmpeg timestamp */
ffpts = gst_ffmpeg_time_gst_to_ff (in_ts, ffmpegdec->context->time_base);
ffpts = gst_ffmpeg_time_gst_to_ff (timestamp, ffmpegdec->context->time_base);
/* feed the parser */
res = av_parser_parse (ffmpegdec->pctx, ffmpegdec->context,
&data, &size, bdata, bsize, ffpts, ffpts);
/* get new timestamp from the parser */
in_ts = gst_ffmpeg_time_ff_to_gst (ffmpegdec->pctx->pts,
ffmpegdec->context->time_base);
GST_LOG_OBJECT (ffmpegdec,
"Parsed video frame, res=%d, size=%d, data=%p, in_ts:%"
GST_TIME_FORMAT, res, size, data, GST_TIME_ARGS (in_ts));
"parser returned res %d and size %d", res, size);
if (res == 0 || size == 0) {
GST_LOG_OBJECT (ffmpegdec,
"parser returned res %d and size %d, breaking", res, size);
/* if there is no output, we must break and wait for more data. */
if (size == 0)
break;
} else {
bsize -= res;
bdata += res;
GST_LOG_OBJECT (ffmpegdec, "consuming %d bytes. Next ts at %d",
size, left);
/* there is output, set pointers for next round. */
bsize -= size;
bdata += size;
if (left <= size) {
left = 0;
/* activate the input timestamp */
timestamp = in_ts;
GST_LOG_OBJECT (ffmpegdec, "activated ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
}
} else {
else {
left -= size;
/* get new timestamp from the parser */
timestamp = gst_ffmpeg_time_ff_to_gst (ffmpegdec->pctx->pts,
ffmpegdec->context->time_base);
GST_LOG_OBJECT (ffmpegdec, "new ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
}
}
else {
data = bdata;
size = bsize;
}
@ -1892,9 +1897,6 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
break;
}
/* now we don;t know the timestamp anymore, the parser should help */
GST_BUFFER_TIMESTAMP (inbuf) = in_ts = GST_CLOCK_TIME_NONE;
GST_LOG_OBJECT (ffmpegdec, "Before (while bsize>0). bsize:%d , bdata:%p",
bsize, bdata);
} while (bsize > 0);
@ -1903,14 +1905,14 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
if ((ffmpegdec->pctx || oclass->in_plugin->id == CODEC_ID_MP3) && bsize > 0) {
GST_LOG_OBJECT (ffmpegdec,
"Keeping %d bytes of data with timestamp %" GST_TIME_FORMAT, bsize,
GST_TIME_ARGS (in_ts));
GST_TIME_ARGS (timestamp));
ffmpegdec->pcache = gst_buffer_create_sub (inbuf,
GST_BUFFER_SIZE (inbuf) - bsize, bsize);
/* we keep timestamp, even though all we really know is that the correct
* timestamp is not below the one from inbuf */
GST_BUFFER_TIMESTAMP (ffmpegdec->pcache) = in_ts;
} else if (bsize > 0) {
GST_BUFFER_TIMESTAMP (ffmpegdec->pcache) = timestamp;
} else if (size > 0) {
GST_DEBUG_OBJECT (ffmpegdec, "Dropping %d bytes of data", bsize);
}
gst_buffer_unref (inbuf);