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avcodec/cbs: use a reference to the assembled CodedBitstreamFragment buffer when writing packets

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This saves one malloc + memcpy per packet

The CodedBitstreamFragment buffer is padded to follow the requirements
of AVPacket.

Reviewed-by: jkqxz
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2018-03-05 11:04:59 -03:00
parent 69995a94d8
commit df3a2ff767
3 changed files with 15 additions and 8 deletions
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8
libavcodec/cbs_h2645.c
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@@ -1298,7 +1298,7 @@ static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
max_size += 3 + frag->units[i].data_size * 3 / 2;
}
data = av_malloc(max_size);
data = av_malloc(max_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!data)
return AVERROR(ENOMEM);
@@ -1349,11 +1349,13 @@ static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
}
av_assert0(dp <= max_size);
err = av_reallocp(&data, dp);
err = av_reallocp(&data, dp + AV_INPUT_BUFFER_PADDING_SIZE);
if (err)
return err;
memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE);
frag->data_ref = av_buffer_create(data, dp, NULL, NULL, 0);
frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE,
NULL, NULL, 0);
if (!frag->data_ref) {
av_freep(&data);
return AVERROR(ENOMEM);