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| author | Kostya Shishkov <kostya.shishkov@gmail.com> | 2010-02-23 06:39:23 +0000 |
|---|---|---|
| committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2010-02-23 06:39:23 +0000 |
| commit | ba3e8214144d92a20a951996e17b0c9f17695560 (patch) | |
| tree | 68badd5acfe0756cc025aeee13aa5d5f4abbd336 | |
| parent | a45972a806f842edbd11c92b75e740c6df66e3b5 (diff) | |
| download | ffmpeg-ba3e8214144d92a20a951996e17b0c9f17695560.tar.gz | |
Bink video decoder now can use extradata to detect alpha plane presence
Originally committed as revision 21979 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/bink.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/libavcodec/bink.c b/libavcodec/bink.c index a573d7be30..bd1326c473 100644 --- a/libavcodec/bink.c +++ b/libavcodec/bink.c @@ -27,6 +27,9 @@ #define ALT_BITSTREAM_READER_LE #include "get_bits.h" +#define BINK_FLAG_ALPHA 0x00100000 +#define BINK_FLAG_GRAY 0x00020000 + static VLC bink_trees[16]; /** @@ -930,13 +933,19 @@ static av_cold int decode_init(AVCodecContext *avctx) BinkContext * const c = avctx->priv_data; static VLC_TYPE table[16 * 128][2]; int i; + int flags; c->version = avctx->codec_tag >> 24; if (c->version < 'c') { av_log(avctx, AV_LOG_ERROR, "Too old version '%c'\n", c->version); return -1; } - c->has_alpha = 0; //TODO: demuxer should supply decoder with flags + if (avctx->extradata_size < 4) { + av_log(avctx, AV_LOG_ERROR, "Extradata missing or too short\n"); + return -1; + } + flags = AV_RL32(avctx->extradata); + c->has_alpha = flags & BINK_FLAG_ALPHA; c->swap_planes = c->version >= 'i'; if (!bink_trees[15].table) { for (i = 0; i < 16; i++) { |