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electronicarts: demux alpha stream

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Electronic Arts VP6 files may contain two video streams: one for the
primary video stream and another for the alpha mask. The file format
uses identical data structures for both streams.

Signed-off-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Peter Ross 2015-06-25 15:05:07 +10:00 committed by Michael Niedermayer
parent a2517fca1e
commit 803bdc5469
1 changed files with 15 additions and 3 deletions
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18
libavformat/electronicarts.c
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@ -59,6 +59,9 @@
#define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
#define MV0K_TAG MKTAG('M', 'V', '0', 'K')
#define MV0F_TAG MKTAG('M', 'V', '0', 'F')
#define AVhd_TAG MKTAG('A', 'V', 'h', 'd')
#define AV0K_TAG MKTAG('A', 'V', '0', 'K')
#define AV0F_TAG MKTAG('A', 'V', '0', 'F')
#define MVIh_TAG MKTAG('M', 'V', 'I', 'h') /* CMV header */
#define MVIf_TAG MKTAG('M', 'V', 'I', 'f') /* CMV I-frame */
#define AVP6_TAG MKTAG('A', 'V', 'P', '6')
@ -74,7 +77,7 @@ typedef struct VideoProperties {
typedef struct EaDemuxContext {
int big_endian;
VideoProperties video;
VideoProperties video, alpha;
enum AVCodecID audio_codec;
int audio_stream_index;
@ -431,6 +434,10 @@ static int process_ea_header(AVFormatContext *s)
case MVhd_TAG:
err = process_video_header_vp6(s, &ea->video);
break;
case AVhd_TAG:
err = process_video_header_vp6(s, &ea->alpha);
break;
}
if (err < 0) {
@ -511,7 +518,7 @@ static int ea_read_header(AVFormatContext *s)
if (process_ea_header(s)<=0)
return AVERROR(EIO);
if (init_video_stream(s, &ea->video))
if (init_video_stream(s, &ea->video) || init_video_stream(s, &ea->alpha))
return AVERROR(ENOMEM);
if (ea->audio_codec) {
@ -672,10 +679,12 @@ static int ea_read_packet(AVFormatContext *s, AVPacket *pkt)
goto get_video_packet;
case MV0K_TAG:
case AV0K_TAG:
case MPCh_TAG:
case pIQT_TAG:
key = AV_PKT_FLAG_KEY;
case MV0F_TAG:
case AV0F_TAG:
get_video_packet:
if (!chunk_size)
continue;
@ -689,7 +698,10 @@ get_video_packet:
break;
}
partial_packet = chunk_type == MVIh_TAG;
pkt->stream_index = ea->video.stream_index;
if (chunk_type == AV0K_TAG || chunk_type == AV0F_TAG)
pkt->stream_index = ea->alpha.stream_index;
else
pkt->stream_index = ea->video.stream_index;
pkt->flags |= key;
packet_read = 1;
break;