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movenc: Use null buffers for measuring the amount of data to be written

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-09-18 22:02:17 +03:00
parent 3627ce2f1d
commit 72fe16a13e
1 changed files with 6 additions and 12 deletions
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18
libavformat/movenc.c
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@ -2443,13 +2443,11 @@ static int mov_write_moof_tag(AVIOContext *pb, MOVMuxContext *mov, int tracks)
{
AVIOContext *avio_buf;
int ret, moof_size;
uint8_t *buf;
if ((ret = avio_open_dyn_buf(&avio_buf)) < 0)
if ((ret = ffio_open_null_buf(&avio_buf)) < 0)
return ret;
mov_write_moof_tag_internal(avio_buf, mov, tracks, 0);
moof_size = avio_close_dyn_buf(avio_buf, &buf);
av_free(buf);
moof_size = ffio_close_null_buf(avio_buf);
return mov_write_moof_tag_internal(pb, mov, tracks, moof_size);
}
@ -2738,11 +2736,10 @@ static int mov_flush_fragment(AVFormatContext *s)
if (i < mov->nb_streams)
return 0;
if ((ret = avio_open_dyn_buf(&moov_buf)) < 0)
if ((ret = ffio_open_null_buf(&moov_buf)) < 0)
return ret;
mov_write_moov_tag(moov_buf, mov, s);
buf_size = avio_close_dyn_buf(moov_buf, &buf);
av_free(buf);
buf_size = ffio_close_null_buf(moov_buf);
for (i = 0; i < mov->nb_streams; i++)
mov->tracks[i].data_offset = pos + buf_size + 8;
@ -3348,16 +3345,13 @@ static int mov_write_header(AVFormatContext *s)
static int get_moov_size(AVFormatContext *s)
{
int ret;
uint8_t *buf;
AVIOContext *moov_buf;
MOVMuxContext *mov = s->priv_data;
if ((ret = avio_open_dyn_buf(&moov_buf)) < 0)
if ((ret = ffio_open_null_buf(&moov_buf)) < 0)
return ret;
mov_write_moov_tag(moov_buf, mov, s);
ret = avio_close_dyn_buf(moov_buf, &buf);
av_free(buf);
return ret;
return ffio_close_null_buf(moov_buf);
}
/*