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avformat/swf: add support for reading and writing VP6A and Flash Screen Video codecs

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint
2020-10-07 22:21:27 +02:00
parent 8d5f2a005d
commit daac7f4d9c
3 changed files with 35 additions and 14 deletions
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10
libavformat/swfdec.c
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@@ -33,6 +33,7 @@
#include "libavutil/intreadwrite.h"
#include "libavcodec/get_bits.h"
#include "swf.h"
#include "flv.h"
typedef struct SWFDecContext {
int samples_per_frame;
@@ -307,15 +308,24 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
for(i=0; i<s->nb_streams; i++) {
st = s->streams[i];
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
int pkt_flags = 0;
frame = avio_rl16(pb);
len -= 2;
if (len <= 0)
goto skip;
if (st->codecpar->codec_id == AV_CODEC_ID_FLASHSV) {
unsigned flags = avio_r8(pb);
len--;
if (len <= 0)
goto skip;
pkt_flags |= (flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ? AV_PKT_FLAG_KEY : 0;
}
if ((res = av_get_packet(pb, pkt, len)) < 0)
return res;
pkt->pos = pos;
pkt->pts = frame;
pkt->stream_index = st->index;
pkt->flags |= pkt_flags;
return pkt->size;
}
}