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dec: avoid making the buffer writable

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Set the caps right after allocation of the buffer because we know the buffer is
writable then and we are correctly negotiated. Since ffmpeg keeps around
references to frames, making the buffer metadata writable where it was done
before pushing will always end up with a copy and that makes the sink do a slow
memcpy all the time.
This commit is contained in:
Wim Taymans 2011-04-07 12:34:51 +02:00
parent f63d36ade8
commit 6444bd2557
1 changed files with 4 additions and 3 deletions
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7
ext/ffmpeg/gstffmpegdec.c
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@ -940,6 +940,10 @@ alloc_output_buffer (GstFFMpegDec * ffmpegdec, GstBuffer ** outbuf,
*outbuf = new_aligned_buffer (fsize, GST_PAD_CAPS (ffmpegdec->srcpad));
ret = GST_FLOW_OK;
}
/* set caps, we do this here because the buffer is still writable here and we
* are sure to be negotiated */
gst_buffer_set_caps (*outbuf, GST_PAD_CAPS (ffmpegdec->srcpad));
return ret;
/* special cases */
@ -2239,9 +2243,6 @@ gst_ffmpegdec_frame (GstFFMpegDec * ffmpegdec,
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
ffmpegdec->discont = FALSE;
}
/* set caps */
outbuf = gst_buffer_make_metadata_writable (outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (ffmpegdec->srcpad));
if (ffmpegdec->segment.rate > 0.0) {
/* and off we go */