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Code Issues Releases Activity

changed quant matrix order (should fix mmx mpeg decoding bug)

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Originally committed as revision 49 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2001-08-07 22:47:08 +00:00
parent 47476fa9fd
commit 6083244881
1 changed files with 18 additions and 12 deletions
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30
libavcodec/mpeg12.c
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@ -1172,32 +1172,36 @@ static void mpeg_decode_sequence_extension(MpegEncContext *s)
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
{
int i, v;
int i, v, j;
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
s->intra_matrix[i] = v;
s->chroma_intra_matrix[i] = v;
j = block_permute_op(i);
s->intra_matrix[j] = v;
s->chroma_intra_matrix[j] = v;
}
}
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
s->non_intra_matrix[i] = v;
s->chroma_non_intra_matrix[i] = v;
j = block_permute_op(i);
s->non_intra_matrix[j] = v;
s->chroma_non_intra_matrix[j] = v;
}
}
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
s->chroma_intra_matrix[i] = v;
j = block_permute_op(i);
s->chroma_intra_matrix[j] = v;
}
}
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
s->chroma_non_intra_matrix[i] = v;
j = block_permute_op(i);
s->chroma_non_intra_matrix[j] = v;
}
}
}
@ -1345,7 +1349,7 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
{
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
int width, height, i, v;
int width, height, i, v, j;
init_get_bits(&s->gb, buf, buf_size);
@ -1389,8 +1393,9 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
s->intra_matrix[i] = v;
s->chroma_intra_matrix[i] = v;
j = block_permute_op(i);
s->intra_matrix[j] = v;
s->chroma_intra_matrix[j] = v;
}
} else {
for(i=0;i<64;i++) {
@ -1402,8 +1407,9 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
s->non_intra_matrix[i] = v;
s->chroma_non_intra_matrix[i] = v;
j = block_permute_op(i);
s->non_intra_matrix[j] = v;
s->chroma_non_intra_matrix[j] = v;
}
} else {
for(i=0;i<64;i++) {