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avformat/avienc: factor write_odml_master() out 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-03-19 03:02:42 +01:00
parent 5440d4b68b
commit c3a6d179fb
1 changed files with 29 additions and 20 deletions
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49
libavformat/avienc.c
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@ -156,6 +156,34 @@ static int avi_write_counters(AVFormatContext *s, int riff_id)
return 0;
}
static void write_odml_master(AVFormatContext *s, int stream_index)
{
AVIOContext *pb = s->pb;
AVStream *st = s->streams[stream_index];
AVCodecContext *enc = st->codec;
AVIStream *avist = st->priv_data;
unsigned char tag[5];
int j;
/* Starting to lay out AVI OpenDML master index.
* We want to make it JUNK entry for now, since we'd
* like to get away without making AVI an OpenDML one
* for compatibility reasons. */
avist->indexes.entry = avist->indexes.ents_allocated = 0;
avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
avio_wl16(pb, 4); /* wLongsPerEntry */
avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
/* dwChunkId */
avio_wl64(pb, 0); /* dwReserved[3] */
// avio_wl32(pb, 0); /* Must be 0. */
for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
avio_wl64(pb, 0);
ff_end_tag(pb, avist->indexes.indx_start);
}
static int avi_write_header(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
@ -365,26 +393,7 @@ static int avi_write_header(AVFormatContext *s)
}
if (pb->seekable) {
unsigned char tag[5];
int j;
/* Starting to lay out AVI OpenDML master index.
* We want to make it JUNK entry for now, since we'd
* like to get away without making AVI an OpenDML one
* for compatibility reasons. */
avist->indexes.entry = avist->indexes.ents_allocated = 0;
avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
avio_wl16(pb, 4); /* wLongsPerEntry */
avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
ffio_wfourcc(pb, avi_stream2fourcc(tag, i, enc->codec_type));
/* dwChunkId */
avio_wl64(pb, 0); /* dwReserved[3] */
// avio_wl32(pb, 0); /* Must be 0. */
for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
avio_wl64(pb, 0);
ff_end_tag(pb, avist->indexes.indx_start);
write_odml_master(s, i);
}
if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&