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Merge "Modeling default coef probs with distribution" into experimental

This commit is contained in:
Deb Mukherjee 2013-03-26 07:13:13 -07:00 коммит произвёл Gerrit Code Review
Родитель f68350ca98 fd18d5dffe
Коммит 49dcc71493
10 изменённых файлов: 1873 добавлений и 52 удалений
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1
configure поставляемый
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@ -247,6 +247,7 @@ EXPERIMENT_LIST="
abovesprefmv
code_nonzerocount
useselectrefmv
modelcoefprob
"
CONFIG_LIST="
external_build

11
vp9/common/vp9_coefupdateprobs.h
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@ -13,9 +13,10 @@
/* Update probabilities for the nodes in the token entropy tree.
Generated file included by vp9_entropy.c */
#define COEF_UPDATE_PROB 252
#define COEF_UPDATE_PROB_8X8 252
#define COEF_UPDATE_PROB_16X16 252
static const vp9_prob vp9_coef_update_prob[ENTROPY_NODES] = {
252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252
};
#if CONFIG_CODE_NONZEROCOUNT
#define NZC_UPDATE_PROB_4X4 252
@ -25,4 +26,8 @@
#define NZC_UPDATE_PROB_PCAT 252
#endif
#if CONFIG_MODELCOEFPROB
#define COEF_MODEL_UPDATE_PROB 16
#endif
#endif // VP9_COMMON_VP9_COEFUPDATEPROBS_H__

4
vp9/common/vp9_default_coef_probs.h
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@ -11,6 +11,10 @@
/*Generated file, included by vp9_entropy.c*/
// NOTE: When the CONFIG_MODELCOEFPROB experiment is on, only the first
// 2 or 3 from each row is actually used depending on whether
// UNCONSTRAINDED_NODES is 2 or 3. If this experiment is merged
// the tables below should be shortened accordingly.
static const vp9_coeff_probs default_coef_probs_4x4[BLOCK_TYPES] = {
{ /* block Type 0 */
{ /* Intra */

1708
vp9/common/vp9_entropy.c
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35
vp9/common/vp9_entropy.h
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@ -15,7 +15,6 @@
#include "vp9/common/vp9_treecoder.h"
#include "vp9/common/vp9_blockd.h"
#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_coefupdateprobs.h"
extern const int vp9_i8x8_block[4];
@ -33,8 +32,8 @@ extern const int vp9_i8x8_block[4];
#define DCT_VAL_CATEGORY5 9 /* 35-66 Extra Bits 5+1 */
#define DCT_VAL_CATEGORY6 10 /* 67+ Extra Bits 14+1 */
#define DCT_EOB_TOKEN 11 /* EOB Extra Bits 0+0 */
#define MAX_ENTROPY_TOKENS 12
#define ENTROPY_NODES 11
#define MAX_ENTROPY_TOKENS 12
#define ENTROPY_NODES 11
#define EOSB_TOKEN 127 /* Not signalled, encoder only */
#define INTER_MODE_CONTEXTS 7
@ -142,6 +141,33 @@ static int get_coef_band(TX_SIZE tx_size, int coef_index) {
}
extern int vp9_get_coef_context(int * recent_energy, int token);
#if CONFIG_MODELCOEFPROB
#define COEFPROB_BITS 8
#define COEFPROB_MODELS (1 << COEFPROB_BITS)
// 2 => EOB and Zero nodes are unconstrained, rest are modeled
// 3 => EOB, Zero and One nodes are unconstrained, rest are modeled
#define UNCONSTRAINED_NODES 3 // Choose one of 2 or 3
// whether forward updates are model-based
#define MODEL_BASED_UPDATE 0
// if model-based how many nodes are unconstrained
#define UNCONSTRAINED_UPDATE_NODES 3
// whether backward updates are model-based
#define MODEL_BASED_ADAPT 0
#define UNCONSTRAINED_ADAPT_NODES 3
// whether to adjust the coef probs for key frames based on qindex
#define ADJUST_KF_COEF_PROBS 0
typedef vp9_prob vp9_coeff_probs_model[REF_TYPES][COEF_BANDS]
[PREV_COEF_CONTEXTS][2];
extern const vp9_prob vp9_modelcoefprobs[COEFPROB_MODELS][ENTROPY_NODES - 1];
void vp9_get_model_distribution(vp9_prob model, vp9_prob *tree_probs,
int b, int r);
void vp9_adjust_default_coef_probs(struct VP9Common *cm);
#endif // CONFIG_MODELCOEFPROB
#if CONFIG_CODE_NONZEROCOUNT
/* Alphabet for number of non-zero symbols in block */
#define NZC_0 0 /* Used for all blocks */
@ -224,4 +250,7 @@ extern const int vp9_extranzcbits[NZC32X32_TOKENS];
extern const int vp9_basenzcvalue[NZC32X32_TOKENS];
#endif // CONFIG_CODE_NONZEROCOUNT
#include "vp9/common/vp9_coefupdateprobs.h"
#endif // VP9_COMMON_VP9_ENTROPY_H_

18
vp9/decoder/vp9_decodframe.c
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@ -1197,6 +1197,12 @@ static void read_nzc_probs(VP9_COMMON *cm,
static void read_coef_probs_common(BOOL_DECODER* const bc,
vp9_coeff_probs *coef_probs,
int block_types) {
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
const int entropy_nodes_update = UNCONSTRAINED_UPDATE_NODES;
#else
const int entropy_nodes_update = ENTROPY_NODES;
#endif
int i, j, k, l, m;
if (vp9_read_bit(bc)) {
@ -1206,11 +1212,15 @@ static void read_coef_probs_common(BOOL_DECODER* const bc,
for (l = 0; l < PREV_COEF_CONTEXTS; l++) {
if (l >= 3 && k == 0)
continue;
for (m = CONFIG_CODE_NONZEROCOUNT; m < ENTROPY_NODES; m++) {
for (m = CONFIG_CODE_NONZEROCOUNT; m < entropy_nodes_update; m++) {
vp9_prob *const p = coef_probs[i][j][k][l] + m;
if (vp9_read(bc, COEF_UPDATE_PROB)) {
if (vp9_read(bc, vp9_coef_update_prob[m])) {
*p = read_prob_diff_update(bc, *p);
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
if (m == 1)
vp9_get_model_distribution(*p, coef_probs[i][j][k][l], i, j);
#endif
}
}
}
@ -1611,6 +1621,10 @@ int vp9_decode_frame(VP9D_COMP *pbi, const unsigned char **p_data_end) {
}
}
}
#if CONFIG_MODELCOEFPROB && ADJUST_KF_COEF_PROBS
if (pc->frame_type == KEY_FRAME)
vp9_adjust_default_coef_probs(pc);
#endif
#if CONFIG_NEW_MVREF
// If Key frame reset mv ref id probabilities to defaults

137
vp9/encoder/vp9_bitstream.c
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@ -399,6 +399,43 @@ static int prob_diff_update_savings_search(const unsigned int *ct,
return bestsavings;
}
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
static int prob_diff_update_savings_search_model(const unsigned int *ct,
const vp9_prob *oldp,
vp9_prob *bestp,
const vp9_prob upd,
int b, int r) {
int i, old_b, new_b, update_b, savings, bestsavings, step;
int newp;
vp9_prob bestnewp, newplist[ENTROPY_NODES];
for (i = UNCONSTRAINED_NODES - 1, old_b = 0; i < ENTROPY_NODES; ++i)
old_b += cost_branch256(ct + 2 * i, oldp[i]);
bestsavings = 0;
bestnewp = oldp[UNCONSTRAINED_NODES - 1];
step = (*bestp > oldp[UNCONSTRAINED_NODES - 1] ? -1 : 1);
newp = *bestp;
// newp = *bestp - step * (abs(*bestp - oldp[UNCONSTRAINED_NODES - 1]) >> 1);
for (; newp != oldp[UNCONSTRAINED_NODES - 1]; newp += step) {
if (newp < 1 || newp > 255) continue;
newplist[UNCONSTRAINED_NODES - 1] = newp;
vp9_get_model_distribution(newp, newplist, b, r);
for (i = UNCONSTRAINED_NODES - 1, new_b = 0; i < ENTROPY_NODES; ++i)
new_b += cost_branch256(ct + 2 * i, newplist[i]);
update_b = prob_diff_update_cost(newp, oldp[UNCONSTRAINED_NODES - 1]) +
vp9_cost_upd256;
savings = old_b - new_b - update_b;
if (savings > bestsavings) {
bestsavings = savings;
bestnewp = newp;
}
}
*bestp = bestnewp;
return bestsavings;
}
#endif
static void vp9_cond_prob_update(vp9_writer *bc, vp9_prob *oldp, vp9_prob upd,
unsigned int *ct) {
vp9_prob newp;
@ -2014,6 +2051,11 @@ static void update_coef_probs_common(vp9_writer* const bc,
int i, j, k, l, t;
int update[2] = {0, 0};
int savings;
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
const int entropy_nodes_update = UNCONSTRAINED_UPDATE_NODES;
#else
const int entropy_nodes_update = ENTROPY_NODES;
#endif
// vp9_prob bestupd = find_coef_update_prob(cpi);
/* dry run to see if there is any udpate at all needed */
@ -2021,20 +2063,27 @@ static void update_coef_probs_common(vp9_writer* const bc,
for (i = 0; i < block_types; ++i) {
for (j = 0; j < REF_TYPES; ++j) {
for (k = 0; k < COEF_BANDS; ++k) {
int prev_coef_savings[ENTROPY_NODES] = {0};
// int prev_coef_savings[ENTROPY_NODES] = {0};
for (l = 0; l < PREV_COEF_CONTEXTS; ++l) {
for (t = CONFIG_CODE_NONZEROCOUNT; t < ENTROPY_NODES; ++t) {
for (t = CONFIG_CODE_NONZEROCOUNT; t < entropy_nodes_update; ++t) {
vp9_prob newp = new_frame_coef_probs[i][j][k][l][t];
const vp9_prob oldp = old_frame_coef_probs[i][j][k][l][t];
const vp9_prob upd = COEF_UPDATE_PROB;
int s = prev_coef_savings[t];
const vp9_prob upd = vp9_coef_update_prob[t];
int s; // = prev_coef_savings[t];
int u = 0;
if (l >= 3 && k == 0)
continue;
#if defined(SEARCH_NEWP)
s = prob_diff_update_savings_search(frame_branch_ct[i][j][k][l][t],
oldp, &newp, upd);
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
if (t == UNCONSTRAINED_NODES - 1)
s = prob_diff_update_savings_search_model(
frame_branch_ct[i][j][k][l][0],
old_frame_coef_probs[i][j][k][l], &newp, upd, i, j);
else
#endif
s = prob_diff_update_savings_search(
frame_branch_ct[i][j][k][l][t], oldp, &newp, upd);
if (s > 0 && newp != oldp)
u = 1;
if (u)
@ -2061,45 +2110,57 @@ static void update_coef_probs_common(vp9_writer* const bc,
/* Is coef updated at all */
if (update[1] == 0 || savings < 0) {
vp9_write_bit(bc, 0);
} else {
vp9_write_bit(bc, 1);
for (i = 0; i < block_types; ++i) {
for (j = 0; j < REF_TYPES; ++j) {
for (k = 0; k < COEF_BANDS; ++k) {
int prev_coef_savings[ENTROPY_NODES] = {0};
for (l = 0; l < PREV_COEF_CONTEXTS; ++l) {
// calc probs and branch cts for this frame only
for (t = CONFIG_CODE_NONZEROCOUNT; t < ENTROPY_NODES; ++t) {
vp9_prob newp = new_frame_coef_probs[i][j][k][l][t];
vp9_prob *oldp = old_frame_coef_probs[i][j][k][l] + t;
const vp9_prob upd = COEF_UPDATE_PROB;
int s = prev_coef_savings[t];
int u = 0;
if (l >= 3 && k == 0)
continue;
return;
}
vp9_write_bit(bc, 1);
for (i = 0; i < block_types; ++i) {
for (j = 0; j < REF_TYPES; ++j) {
for (k = 0; k < COEF_BANDS; ++k) {
// int prev_coef_savings[ENTROPY_NODES] = {0};
for (l = 0; l < PREV_COEF_CONTEXTS; ++l) {
// calc probs and branch cts for this frame only
for (t = CONFIG_CODE_NONZEROCOUNT; t < entropy_nodes_update; ++t) {
vp9_prob newp = new_frame_coef_probs[i][j][k][l][t];
vp9_prob *oldp = old_frame_coef_probs[i][j][k][l] + t;
const vp9_prob upd = vp9_coef_update_prob[t];
int s; // = prev_coef_savings[t];
int u = 0;
if (l >= 3 && k == 0)
continue;
#if defined(SEARCH_NEWP)
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
if (t == UNCONSTRAINED_NODES - 1)
s = prob_diff_update_savings_search_model(
frame_branch_ct[i][j][k][l][0],
old_frame_coef_probs[i][j][k][l], &newp, upd, i, j);
else
#endif
s = prob_diff_update_savings_search(
frame_branch_ct[i][j][k][l][t],
*oldp, &newp, upd);
if (s > 0 && newp != *oldp)
u = 1;
frame_branch_ct[i][j][k][l][t],
*oldp, &newp, upd);
if (s > 0 && newp != *oldp)
u = 1;
#else
s = prob_update_savings(frame_branch_ct[i][j][k][l][t],
*oldp, newp, upd);
if (s > 0)
u = 1;
s = prob_update_savings(frame_branch_ct[i][j][k][l][t],
*oldp, newp, upd);
if (s > 0)
u = 1;
#endif
vp9_write(bc, u, upd);
vp9_write(bc, u, upd);
#ifdef ENTROPY_STATS
if (!cpi->dummy_packing)
++tree_update_hist[i][j][k][l][t][u];
if (!cpi->dummy_packing)
++tree_update_hist[i][j][k][l][t][u];
#endif
if (u) {
/* send/use new probability */
write_prob_diff_update(bc, newp, *oldp);
*oldp = newp;
#if CONFIG_MODELCOEFPROB && MODEL_BASED_UPDATE
if (t == UNCONSTRAINED_NODES - 1)
vp9_get_model_distribution(
newp, old_frame_coef_probs[i][j][k][l], i, j);
#endif
if (u) {
/* send/use new probability */
write_prob_diff_update(bc, newp, *oldp);
*oldp = newp;
}
}
}
}

3
vp9/encoder/vp9_encodeframe.c
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@ -1287,9 +1287,6 @@ static void encode_frame_internal(VP9_COMP *cpi) {
vp9_zero(cpi->mb_mv_ref_count);
#endif
// force lossless mode
if (cm->base_qindex <= 4)
cm->base_qindex = 0;
cpi->mb.e_mbd.lossless = (cm->base_qindex == 0 &&
cm->y1dc_delta_q == 0 &&
cm->uvdc_delta_q == 0 &&

4
vp9/encoder/vp9_onyx_if.c
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@ -3042,6 +3042,10 @@ static void encode_frame_to_data_rate(VP9_COMP *cpi,
}
// transform / motion compensation build reconstruction frame
#if CONFIG_MODELCOEFPROB && ADJUST_KF_COEF_PROBS
if (cm->frame_type == KEY_FRAME)
vp9_adjust_default_coef_probs(cm);
#endif
vp9_encode_frame(cpi);

4
vp9/encoder/vp9_quantize.c
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@ -730,6 +730,10 @@ void vp9_set_quantizer(struct VP9_COMP *cpi, int Q) {
cm->base_qindex = Q;
// Set lossless mode
if (cm->base_qindex <= 4)
cm->base_qindex = 0;
// if any of the delta_q values are changing update flag will
// have to be set.
cm->y1dc_delta_q = 0;