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theora alpha3 support (with maintaining backward compatibility, maybe we should remove all backward compatibility codes after final theora release?)

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Originally committed as revision 2527 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Beregszaszi 2003-11-23 18:49:53 +00:00
parent 9a7ad92531
commit 105c3d2521
1 changed files with 15 additions and 3 deletions
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18
libavcodec/vp3.c
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@ -2765,7 +2765,9 @@ static int vp3_decode_frame(AVCodecContext *avctx,
{
s->last_quality_index = s->quality_index;
s->quality_index = get_bits(&gb, 6);
if ( s->keyframe)
if (s->theora >= 0x030300)
skip_bits1(&gb);
if (s->keyframe)
{
if (get_bits1(&gb))
av_log(s->avctx, AV_LOG_ERROR, "Theora: warning, unsupported keyframe coding type?!\n");
@ -2924,9 +2926,12 @@ static int theora_decode_header(AVCodecContext *avctx, GetBitContext gb)
av_log(avctx, AV_LOG_INFO, "Theora bitstream version %d.%d.%d\n",
major, minor, micro);
/* FIXME: endianess? */
s->theora = (major << 16) | (minor << 8) | micro;
/* 3.3.0 aka alpha3 has the same frame orientation as original vp3 */
/* but previous versions have the image flipped relative to vp3 */
if ((major <= 3) && (minor < 3))
if (s->theora < 0x030300)
{
s->flipped_image = 1;
av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
@ -2946,12 +2951,19 @@ static int theora_decode_header(AVCodecContext *avctx, GetBitContext gb)
skip_bits(&gb, 24); /* aspect numerator */
skip_bits(&gb, 24); /* aspect denumerator */
skip_bits(&gb, 5); /* keyframe frequency force */
if (s->theora < 0x030300)
skip_bits(&gb, 5); /* keyframe frequency force */
skip_bits(&gb, 8); /* colorspace */
skip_bits(&gb, 24); /* bitrate */
skip_bits(&gb, 6); /* last(?) quality index */
if (s->theora >= 0x030300)
{
skip_bits(&gb, 5); /* keyframe frequency force */
skip_bits(&gb, 5); /* spare bits */
}
// align_get_bits(&gb);
avctx->width = s->width;