vpx/vp9/decoder/vp9_dequantize.c

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/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
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*/
#include "vp9_rtcd.h"
#include "vp9/decoder/vp9_dequantize.h"
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#include "vpx_mem/vpx_mem.h"
#include "vp9/decoder/vp9_onyxd_int.h"
#include "vp9/common/vp9_common.h"
static void add_residual(const int16_t *diff, const uint8_t *pred, int pitch,
uint8_t *dest, int stride, int width, int height) {
int r, c;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++) {
dest[c] = clip_pixel(diff[c] + pred[c]);
}
dest += stride;
diff += width;
pred += pitch;
}
}
static void add_constant_residual(const int16_t diff, const uint8_t *pred,
int pitch, uint8_t *dest, int stride,
int width, int height) {
int r, c;
for (r = 0; r < height; r++) {
for (c = 0; c < width; c++) {
dest[c] = clip_pixel(diff + pred[c]);
}
dest += stride;
pred += pitch;
}
}
void vp9_dequantize_b_c(BLOCKD *d) {
int i;
int16_t *DQ = d->dqcoeff;
const int16_t *Q = d->qcoeff;
const int16_t *DQC = d->dequant;
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for (i = 0; i < 16; i++) {
DQ[i] = Q[i] * DQC[i];
}
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}
void vp9_ht_dequant_idct_add_c(TX_TYPE tx_type, int16_t *input,
const int16_t *dq,
uint8_t *pred, uint8_t *dest,
int pitch, int stride, uint16_t eobs) {
int16_t output[16];
int16_t *diff_ptr = output;
int i;
for (i = 0; i < 16; i++) {
input[i] = dq[i] * input[i];
}
vp9_ihtllm(input, output, 4 << 1, tx_type, 4, eobs);
vpx_memset(input, 0, 32);
add_residual(diff_ptr, pred, pitch, dest, stride, 4, 4);
}
void vp9_ht_dequant_idct_add_8x8_c(TX_TYPE tx_type, int16_t *input,
const int16_t *dq,
uint8_t *pred, uint8_t *dest,
int pitch, int stride, uint16_t eobs) {
int16_t output[64];
int16_t *diff_ptr = output;
int i;
if (eobs == 0) {
/* All 0 DCT coefficient */
vp9_copy_mem8x8(pred, pitch, dest, stride);
} else if (eobs > 0) {
input[0] = dq[0] * input[0];
for (i = 1; i < 64; i++) {
input[i] = dq[1] * input[i];
}
vp9_ihtllm(input, output, 16, tx_type, 8, eobs);
vpx_memset(input, 0, 128);
add_residual(diff_ptr, pred, pitch, dest, stride, 8, 8);
}
}
void vp9_dequant_idct_add_c(int16_t *input, const int16_t *dq, uint8_t *pred,
uint8_t *dest, int pitch, int stride) {
int16_t output[16];
int16_t *diff_ptr = output;
int i;
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for (i = 0; i < 16; i++) {
input[i] = dq[i] * input[i];
}
/* the idct halves ( >> 1) the pitch */
vp9_short_idct4x4llm_c(input, output, 4 << 1);
vpx_memset(input, 0, 32);
add_residual(diff_ptr, pred, pitch, dest, stride, 4, 4);
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}
void vp9_dequant_dc_idct_add_c(int16_t *input, const int16_t *dq, uint8_t *pred,
uint8_t *dest, int pitch, int stride, int Dc) {
int i;
int16_t output[16];
int16_t *diff_ptr = output;
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input[0] = (int16_t)Dc;
for (i = 1; i < 16; i++) {
input[i] = dq[i] * input[i];
}
/* the idct halves ( >> 1) the pitch */
vp9_short_idct4x4llm_c(input, output, 4 << 1);
vpx_memset(input, 0, 32);
add_residual(diff_ptr, pred, pitch, dest, stride, 4, 4);
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}
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
#if CONFIG_LOSSLESS
void vp9_dequant_idct_add_lossless_c(int16_t *input, const int16_t *dq,
uint8_t *pred, uint8_t *dest,
int pitch, int stride) {
int16_t output[16];
int16_t *diff_ptr = output;
int i;
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
for (i = 0; i < 16; i++) {
input[i] = dq[i] * input[i];
}
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
vp9_short_inv_walsh4x4_x8_c(input, output, 4 << 1);
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
vpx_memset(input, 0, 32);
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
add_residual(diff_ptr, pred, pitch, dest, stride, 4, 4);
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
}
void vp9_dequant_dc_idct_add_lossless_c(int16_t *input, const int16_t *dq,
uint8_t *pred,
uint8_t *dest,
int pitch, int stride, int dc) {
int i;
int16_t output[16];
int16_t *diff_ptr = output;
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
input[0] = (int16_t)dc;
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
for (i = 1; i < 16; i++) {
input[i] = dq[i] * input[i];
}
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
vp9_short_inv_walsh4x4_x8_c(input, output, 4 << 1);
vpx_memset(input, 0, 32);
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
add_residual(diff_ptr, pred, pitch, dest, stride, 4, 4);
Add lossless compression mode. This commit adds lossless compression capability to the experimental branch. The lossless experiment can be enabled using --enable-lossless in configure. When the experiment is enabled, the encoder will use lossless compression mode by command line option --lossless, and the decoder automatically recognizes a losslessly encoded clip and decodes accordingly. To achieve the lossless coding, this commit has changed the following: 1. To encode at lossless mode, encoder forces the use of unit quantizer, i.e, Q 0, where effective quantization is 1. Encoder also disables the usage of 8x8 transform and allows only 4x4 transform; 2. At Q 0, the first order 4x4 DCT/IDCT have been switched over to a pair of forward and inverse Walsh-Hadamard Transform (http://goo.gl/EIsfy), with proper scaling applied to match the range of the original 4x4 DCT/IDCT pair; 3. At Q 0, the second order remains to use the previous walsh-hadamard transform pair. However, to maintain the reversibility in second order transform at Q 0, scaling down is applied to first order DC coefficients prior to forward transform, and scaling up is applied to the second order output prior to quantization. Symmetric upscaling and downscaling are added around inverse second order transform; 4. At lossless mode, encoder also disables a number of minor features to ensure no loss is introduced, these features includes: a. Trellis quantization optimization b. Loop filtering c. Aggressive zero-binning, rounding and zero-bin boosting d. Mode based zero-bin boosting Lossless coding test was performed on all clips within the derf set, to verify that the commit has achieved lossless compression for all clips. The average compression ratio is around 2.57 to 1. (http://goo.gl/dEShs) Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
2012-06-14 04:03:31 +02:00
}
#endif
void vp9_dequantize_b_2x2_c(BLOCKD *d) {
int i;
int16_t *DQ = d->dqcoeff;
const int16_t *Q = d->qcoeff;
const int16_t *DQC = d->dequant;
for (i = 0; i < 16; i++) {
DQ[i] = (int16_t)((Q[i] * DQC[i]));
}
}
void vp9_dequant_idct_add_8x8_c(int16_t *input, const int16_t *dq,
uint8_t *pred, uint8_t *dest, int pitch,
int stride, int dc, int eob) {
int16_t output[64];
int16_t *diff_ptr = output;
int i;
/* If dc is 1, then input[0] is the reconstructed value, do not need
* dequantization. Also, when dc is 1, dc is counted in eobs, namely eobs >=1.
*/
if (!dc)
input[0] *= dq[0];
/* The calculation can be simplified if there are not many non-zero dct
* coefficients. Use eobs to decide what to do.
* TODO(yunqingwang): "eobs = 1" case is also handled in vp9_short_idct8x8_c.
* Combine that with code here.
*/
if (eob == 0) {
/* All 0 DCT coefficient */
vp9_copy_mem8x8(pred, pitch, dest, stride);
} else if (eob == 1) {
/* DC only DCT coefficient. */
int16_t out;
/* Note: the idct1 will need to be modified accordingly whenever
* vp9_short_idct8x8_c() is modified. */
out = (input[0] + 1 + (input[0] < 0)) >> 2;
out = out << 3;
out = (out + 32) >> 7;
input[0] = 0;
add_constant_residual(out, pred, pitch, dest, stride, 8, 8);
} else if (eob <= 10) {
input[1] = input[1] * dq[1];
input[2] = input[2] * dq[1];
input[3] = input[3] * dq[1];
input[8] = input[8] * dq[1];
input[9] = input[9] * dq[1];
input[10] = input[10] * dq[1];
input[16] = input[16] * dq[1];
input[17] = input[17] * dq[1];
input[24] = input[24] * dq[1];
vp9_short_idct10_8x8_c(input, output, 16);
input[0] = input[1] = input[2] = input[3] = 0;
input[8] = input[9] = input[10] = 0;
input[16] = input[17] = 0;
input[24] = 0;
add_residual(diff_ptr, pred, pitch, dest, stride, 8, 8);
} else {
// recover quantizer for 4 4x4 blocks
for (i = 1; i < 64; i++) {
input[i] = input[i] * dq[1];
}
// the idct halves ( >> 1) the pitch
vp9_short_idct8x8_c(input, output, 16);
vpx_memset(input, 0, 128);
add_residual(diff_ptr, pred, pitch, dest, stride, 8, 8);
}
}
void vp9_ht_dequant_idct_add_16x16_c(TX_TYPE tx_type, int16_t *input,
const int16_t *dq, uint8_t *pred,
uint8_t *dest, int pitch, int stride,
uint16_t eobs) {
int16_t output[256];
int16_t *diff_ptr = output;
int i;
if (eobs == 0) {
/* All 0 DCT coefficient */
vp9_copy_mem16x16(pred, pitch, dest, stride);
} else if (eobs > 0) {
input[0]= input[0] * dq[0];
// recover quantizer for 4 4x4 blocks
for (i = 1; i < 256; i++)
input[i] = input[i] * dq[1];
// inverse hybrid transform
vp9_ihtllm(input, output, 32, tx_type, 16, eobs);
// the idct halves ( >> 1) the pitch
// vp9_short_idct16x16_c(input, output, 32);
vpx_memset(input, 0, 512);
add_residual(diff_ptr, pred, pitch, dest, stride, 16, 16);
}
}
void vp9_dequant_idct_add_16x16_c(int16_t *input, const int16_t *dq,
uint8_t *pred, uint8_t *dest, int pitch,
int stride, int eob) {
int16_t output[256];
int16_t *diff_ptr = output;
int i;
/* The calculation can be simplified if there are not many non-zero dct
* coefficients. Use eobs to separate different cases. */
if (eob == 0) {
/* All 0 DCT coefficient */
vp9_copy_mem16x16(pred, pitch, dest, stride);
} else if (eob == 1) {
/* DC only DCT coefficient. */
int16_t out;
/* Note: the idct1 will need to be modified accordingly whenever
* vp9_short_idct16x16_c() is modified. */
out = (input[0] * dq[0] + 2) >> 2;
out = (out + 2) >> 2;
out = (out + 4) >> 3;
input[0] = 0;
add_constant_residual(out, pred, pitch, dest, stride, 16, 16);
} else if (eob <= 10) {
input[0]= input[0] * dq[0];
input[1] = input[1] * dq[1];
input[2] = input[2] * dq[1];
input[3] = input[3] * dq[1];
input[16] = input[16] * dq[1];
input[17] = input[17] * dq[1];
input[18] = input[18] * dq[1];
input[32] = input[32] * dq[1];
input[33] = input[33] * dq[1];
input[48] = input[48] * dq[1];
// the idct halves ( >> 1) the pitch
vp9_short_idct10_16x16_c(input, output, 32);
input[0] = input[1] = input[2] = input[3] = 0;
input[16] = input[17] = input[18] = 0;
input[32] = input[33] = 0;
input[48] = 0;
add_residual(diff_ptr, pred, pitch, dest, stride, 16, 16);
} else {
input[0]= input[0] * dq[0];
// recover quantizer for 4 4x4 blocks
for (i = 1; i < 256; i++)
input[i] = input[i] * dq[1];
// the idct halves ( >> 1) the pitch
vp9_short_idct16x16_c(input, output, 32);
vpx_memset(input, 0, 512);
add_residual(diff_ptr, pred, pitch, dest, stride, 16, 16);
}
}
32x32 transform for superblocks. This adds Debargha's DCT/DWT hybrid and a regular 32x32 DCT, and adds code all over the place to wrap that in the bitstream/encoder/decoder/RD. Some implementation notes (these probably need careful review): - token range is extended by 1 bit, since the value range out of this transform is [-16384,16383]. - the coefficients coming out of the FDCT are manually scaled back by 1 bit, or else they won't fit in int16_t (they are 17 bits). Because of this, the RD error scoring does not right-shift the MSE score by two (unlike for 4x4/8x8/16x16). - to compensate for this loss in precision, the quantizer is halved also. This is currently a little hacky. - FDCT and IDCT is double-only right now. Needs a fixed-point impl. - There are no default probabilities for the 32x32 transform yet; I'm simply using the 16x16 luma ones. A future commit will add newly generated probabilities for all transforms. - No ADST version. I don't think we'll add one for this level; if an ADST is desired, transform-size selection can scale back to 16x16 or lower, and use an ADST at that level. Additional notes specific to Debargha's DWT/DCT hybrid: - coefficient scale is different for the top/left 16x16 (DCT-over-DWT) block than for the rest (DWT pixel differences) of the block. Therefore, RD error scoring isn't easily scalable between coefficient and pixel domain. Thus, unfortunately, we need to compute the RD distortion in the pixel domain until we figure out how to scale these appropriately. Change-Id: I00386f20f35d7fabb19aba94c8162f8aee64ef2b
2012-12-07 23:45:05 +01:00
void vp9_dequant_idct_add_32x32_c(int16_t *input, const int16_t *dq,
uint8_t *pred, uint8_t *dest, int pitch,
int stride, int eob) {
int16_t output[1024];
32x32 transform for superblocks. This adds Debargha's DCT/DWT hybrid and a regular 32x32 DCT, and adds code all over the place to wrap that in the bitstream/encoder/decoder/RD. Some implementation notes (these probably need careful review): - token range is extended by 1 bit, since the value range out of this transform is [-16384,16383]. - the coefficients coming out of the FDCT are manually scaled back by 1 bit, or else they won't fit in int16_t (they are 17 bits). Because of this, the RD error scoring does not right-shift the MSE score by two (unlike for 4x4/8x8/16x16). - to compensate for this loss in precision, the quantizer is halved also. This is currently a little hacky. - FDCT and IDCT is double-only right now. Needs a fixed-point impl. - There are no default probabilities for the 32x32 transform yet; I'm simply using the 16x16 luma ones. A future commit will add newly generated probabilities for all transforms. - No ADST version. I don't think we'll add one for this level; if an ADST is desired, transform-size selection can scale back to 16x16 or lower, and use an ADST at that level. Additional notes specific to Debargha's DWT/DCT hybrid: - coefficient scale is different for the top/left 16x16 (DCT-over-DWT) block than for the rest (DWT pixel differences) of the block. Therefore, RD error scoring isn't easily scalable between coefficient and pixel domain. Thus, unfortunately, we need to compute the RD distortion in the pixel domain until we figure out how to scale these appropriately. Change-Id: I00386f20f35d7fabb19aba94c8162f8aee64ef2b
2012-12-07 23:45:05 +01:00
int i;
input[0]= input[0] * dq[0] / 2;
for (i = 1; i < 1024; i++)
input[i] = input[i] * dq[1] / 2;
vp9_short_idct32x32_c(input, output, 64);
vpx_memset(input, 0, 2048);
add_residual(output, pred, pitch, dest, stride, 32, 32);
}
void vp9_dequant_idct_add_uv_block_16x16_c(int16_t *q, const int16_t *dq,
uint8_t *dstu,
uint8_t *dstv,
32x32 transform for superblocks. This adds Debargha's DCT/DWT hybrid and a regular 32x32 DCT, and adds code all over the place to wrap that in the bitstream/encoder/decoder/RD. Some implementation notes (these probably need careful review): - token range is extended by 1 bit, since the value range out of this transform is [-16384,16383]. - the coefficients coming out of the FDCT are manually scaled back by 1 bit, or else they won't fit in int16_t (they are 17 bits). Because of this, the RD error scoring does not right-shift the MSE score by two (unlike for 4x4/8x8/16x16). - to compensate for this loss in precision, the quantizer is halved also. This is currently a little hacky. - FDCT and IDCT is double-only right now. Needs a fixed-point impl. - There are no default probabilities for the 32x32 transform yet; I'm simply using the 16x16 luma ones. A future commit will add newly generated probabilities for all transforms. - No ADST version. I don't think we'll add one for this level; if an ADST is desired, transform-size selection can scale back to 16x16 or lower, and use an ADST at that level. Additional notes specific to Debargha's DWT/DCT hybrid: - coefficient scale is different for the top/left 16x16 (DCT-over-DWT) block than for the rest (DWT pixel differences) of the block. Therefore, RD error scoring isn't easily scalable between coefficient and pixel domain. Thus, unfortunately, we need to compute the RD distortion in the pixel domain until we figure out how to scale these appropriately. Change-Id: I00386f20f35d7fabb19aba94c8162f8aee64ef2b
2012-12-07 23:45:05 +01:00
int stride,
uint16_t *eobs) {
32x32 transform for superblocks. This adds Debargha's DCT/DWT hybrid and a regular 32x32 DCT, and adds code all over the place to wrap that in the bitstream/encoder/decoder/RD. Some implementation notes (these probably need careful review): - token range is extended by 1 bit, since the value range out of this transform is [-16384,16383]. - the coefficients coming out of the FDCT are manually scaled back by 1 bit, or else they won't fit in int16_t (they are 17 bits). Because of this, the RD error scoring does not right-shift the MSE score by two (unlike for 4x4/8x8/16x16). - to compensate for this loss in precision, the quantizer is halved also. This is currently a little hacky. - FDCT and IDCT is double-only right now. Needs a fixed-point impl. - There are no default probabilities for the 32x32 transform yet; I'm simply using the 16x16 luma ones. A future commit will add newly generated probabilities for all transforms. - No ADST version. I don't think we'll add one for this level; if an ADST is desired, transform-size selection can scale back to 16x16 or lower, and use an ADST at that level. Additional notes specific to Debargha's DWT/DCT hybrid: - coefficient scale is different for the top/left 16x16 (DCT-over-DWT) block than for the rest (DWT pixel differences) of the block. Therefore, RD error scoring isn't easily scalable between coefficient and pixel domain. Thus, unfortunately, we need to compute the RD distortion in the pixel domain until we figure out how to scale these appropriately. Change-Id: I00386f20f35d7fabb19aba94c8162f8aee64ef2b
2012-12-07 23:45:05 +01:00
vp9_dequant_idct_add_16x16_c(q, dq, dstu, dstu, stride, stride, eobs[0]);
vp9_dequant_idct_add_16x16_c(q + 256, dq,
dstv, dstv, stride, stride, eobs[4]);
}