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avformat/av1: Avoid allocation for small headers 

By using avio_get_dyn_buf() + ffio_free_dyn_buf() instead of
avio_close_dyn_buf() + av_free() one can avoid an allocation + copy for
small headers. Furthermore, it simplifies freeing.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-11-27 13:22:07 +01:00 committed by James Almer
parent 67ce9e0463
commit a31f68fb44
1 changed files with 5 additions and 9 deletions
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14
libavformat/av1.c
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@ -326,7 +326,7 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
AV1SequenceParameters seq_params;
PutBitContext pbc;
uint8_t header[4];
uint8_t *seq = NULL, *meta = NULL;
uint8_t *seq, *meta;
int64_t obu_size;
int start_pos, type, temporal_id, spatial_id;
int ret, nb_seq = 0, seq_size, meta_size;
@ -376,7 +376,7 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
buf += len;
}
seq_size = avio_close_dyn_buf(seq_pb, &seq);
seq_size = avio_get_dyn_buf(seq_pb, &seq);
if (!seq_size) {
ret = AVERROR_INVALIDDATA;
goto fail;
@ -401,17 +401,13 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
avio_write(pb, header, sizeof(header));
avio_write(pb, seq, seq_size);
meta_size = avio_close_dyn_buf(meta_pb, &meta);
meta_size = avio_get_dyn_buf(meta_pb, &meta);
if (meta_size)
avio_write(pb, meta, meta_size);
fail:
if (!seq)
avio_close_dyn_buf(seq_pb, &seq);
if (!meta)
avio_close_dyn_buf(meta_pb, &meta);
av_free(seq);
av_free(meta);
ffio_free_dyn_buf(&seq_pb);
ffio_free_dyn_buf(&meta_pb);
return ret;
}