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replace *_dequant (2 intra, 1 inter) by qmat (3 intra, 3 inter) (needed for theora according to spec)

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Originally committed as revision 5774 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-07-17 08:09:08 +00:00
parent d2744e19e0
commit 187c9be7a6
1 changed files with 35 additions and 36 deletions
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71
libavcodec/vp3.c
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@ -285,9 +285,7 @@ typedef struct Vp3DecodeContext {
/* these arrays need to be on 16-byte boundaries since SSE2 operations
* index into them */
DECLARE_ALIGNED_16(int16_t, intra_y_dequant[64]);
DECLARE_ALIGNED_16(int16_t, intra_c_dequant[64]);
DECLARE_ALIGNED_16(int16_t, inter_dequant[64]);
DECLARE_ALIGNED_16(int16_t, qmat[2][4][64]); //<qmat[is_inter][plane]
/* This table contains superblock_count * 16 entries. Each set of 16
* numbers corresponds to the fragment indices 0..15 of the superblock.
@ -667,20 +665,20 @@ static void init_dequantizer(Vp3DecodeContext *s)
#define SCALER 4
/* scale DC quantizers */
s->intra_y_dequant[0] = s->coded_intra_y_dequant[0] * dc_scale_factor / 100;
if (s->intra_y_dequant[0] < MIN_DEQUANT_VAL * 2)
s->intra_y_dequant[0] = MIN_DEQUANT_VAL * 2;
s->intra_y_dequant[0] *= SCALER;
s->qmat[0][0][0] = s->coded_intra_y_dequant[0] * dc_scale_factor / 100;
if (s->qmat[0][0][0] < MIN_DEQUANT_VAL * 2)
s->qmat[0][0][0] = MIN_DEQUANT_VAL * 2;
s->qmat[0][0][0] *= SCALER;
s->intra_c_dequant[0] = s->coded_intra_c_dequant[0] * dc_scale_factor / 100;
if (s->intra_c_dequant[0] < MIN_DEQUANT_VAL * 2)
s->intra_c_dequant[0] = MIN_DEQUANT_VAL * 2;
s->intra_c_dequant[0] *= SCALER;
s->qmat[0][1][0] = s->coded_intra_c_dequant[0] * dc_scale_factor / 100;
if (s->qmat[0][1][0] < MIN_DEQUANT_VAL * 2)
s->qmat[0][1][0] = MIN_DEQUANT_VAL * 2;
s->qmat[0][1][0] *= SCALER;
s->inter_dequant[0] = s->coded_inter_dequant[0] * dc_scale_factor / 100;
if (s->inter_dequant[0] < MIN_DEQUANT_VAL * 4)
s->inter_dequant[0] = MIN_DEQUANT_VAL * 4;
s->inter_dequant[0] *= SCALER;
s->qmat[1][0][0] = s->coded_inter_dequant[0] * dc_scale_factor / 100;
if (s->qmat[1][0][0] < MIN_DEQUANT_VAL * 4)
s->qmat[1][0][0] = MIN_DEQUANT_VAL * 4;
s->qmat[1][0][0] *= SCALER;
/* scale AC quantizers, zigzag at the same time in preparation for
* the dequantization phase */
@ -688,29 +686,33 @@ static void init_dequantizer(Vp3DecodeContext *s)
int k= s->scantable.scantable[i];
j = s->scantable.permutated[i];
s->intra_y_dequant[j] = s->coded_intra_y_dequant[k] * ac_scale_factor / 100;
if (s->intra_y_dequant[j] < MIN_DEQUANT_VAL)
s->intra_y_dequant[j] = MIN_DEQUANT_VAL;
s->intra_y_dequant[j] *= SCALER;
s->qmat[0][0][j] = s->coded_intra_y_dequant[k] * ac_scale_factor / 100;
if (s->qmat[0][0][j] < MIN_DEQUANT_VAL)
s->qmat[0][0][j] = MIN_DEQUANT_VAL;
s->qmat[0][0][j] *= SCALER;
s->intra_c_dequant[j] = s->coded_intra_c_dequant[k] * ac_scale_factor / 100;
if (s->intra_c_dequant[j] < MIN_DEQUANT_VAL)
s->intra_c_dequant[j] = MIN_DEQUANT_VAL;
s->intra_c_dequant[j] *= SCALER;
s->qmat[0][1][j] = s->coded_intra_c_dequant[k] * ac_scale_factor / 100;
if (s->qmat[0][1][j] < MIN_DEQUANT_VAL)
s->qmat[0][1][j] = MIN_DEQUANT_VAL;
s->qmat[0][1][j] *= SCALER;
s->inter_dequant[j] = s->coded_inter_dequant[k] * ac_scale_factor / 100;
if (s->inter_dequant[j] < MIN_DEQUANT_VAL * 2)
s->inter_dequant[j] = MIN_DEQUANT_VAL * 2;
s->inter_dequant[j] *= SCALER;
s->qmat[1][0][j] = s->coded_inter_dequant[k] * ac_scale_factor / 100;
if (s->qmat[1][0][j] < MIN_DEQUANT_VAL * 2)
s->qmat[1][0][j] = MIN_DEQUANT_VAL * 2;
s->qmat[1][0][j] *= SCALER;
}
memset(s->qscale_table, (FFMAX(s->intra_y_dequant[1], s->intra_c_dequant[1])+8)/16, 512); //FIXME finetune
memcpy(s->qmat[0][2], s->qmat[0][1], sizeof(s->qmat[0][0]));
memcpy(s->qmat[1][1], s->qmat[1][0], sizeof(s->qmat[0][0]));
memcpy(s->qmat[1][2], s->qmat[1][0], sizeof(s->qmat[0][0]));
memset(s->qscale_table, (FFMAX(s->qmat[0][0][1], s->qmat[0][1][1])+8)/16, 512); //FIXME finetune
/* print debug information as requested */
debug_dequantizers("intra Y dequantizers:\n");
for (i = 0; i < 8; i++) {
for (j = i * 8; j < i * 8 + 8; j++) {
debug_dequantizers(" %4d,", s->intra_y_dequant[j]);
debug_dequantizers(" %4d,", s->qmat[0][0][j]);
}
debug_dequantizers("\n");
}
@ -719,7 +721,7 @@ static void init_dequantizer(Vp3DecodeContext *s)
debug_dequantizers("intra C dequantizers:\n");
for (i = 0; i < 8; i++) {
for (j = i * 8; j < i * 8 + 8; j++) {
debug_dequantizers(" %4d,", s->intra_c_dequant[j]);
debug_dequantizers(" %4d,", s->qmat[0][1][j]);
}
debug_dequantizers("\n");
}
@ -728,7 +730,7 @@ static void init_dequantizer(Vp3DecodeContext *s)
debug_dequantizers("interframe dequantizers:\n");
for (i = 0; i < 8; i++) {
for (j = i * 8; j < i * 8 + 8; j++) {
debug_dequantizers(" %4d,", s->inter_dequant[j]);
debug_dequantizers(" %4d,", s->qmat[1][0][j]);
}
debug_dequantizers("\n");
}
@ -1847,12 +1849,9 @@ static void render_slice(Vp3DecodeContext *s, int slice)
motion_source + stride + 1 + d,
stride, 8);
}
dequantizer = s->inter_dequant;
dequantizer = s->qmat[1][plane];
}else{
if (plane == 0)
dequantizer = s->intra_y_dequant;
else
dequantizer = s->intra_c_dequant;
dequantizer = s->qmat[0][plane];
}
/* dequantize the DCT coefficients */