- }else{
- for(i=0;i<12;i++)
- s->block_last_index[i] = -1;
- }
- }
-
- s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
-
- return 0;
-}
-
-/* as h263, but only 17 codes */
-static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
-{
- int code, sign, val, l, shift;
-
- code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
- if (code == 0) {
- return pred;
- }
- if (code < 0) {
- return 0xffff;
- }
-
- sign = get_bits1(&s->gb);
- shift = fcode - 1;
- val = code;
- if (shift) {
- val = (val - 1) << shift;
- val |= get_bits(&s->gb, shift);
- val++;
- }
- if (sign)
- val = -val;
- val += pred;
-
- /* modulo decoding */
- l= INT_BIT - 5 - shift;
- val = (val<<l)>>l;
- return val;
-}
-
-static inline int decode_dc(GetBitContext *gb, int component)
-{
- int code, diff;
-
- if (component == 0) {
- code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
- } else {
- code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
- }
- if (code < 0){
- av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
- return 0xffff;
- }
- if (code == 0) {
- diff = 0;
- } else {
- diff = get_xbits(gb, code);
- }
- return diff;
-}
-
-static inline int mpeg1_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, dc, diff, i, j, run;
- int component;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix= s->intra_matrix;
- const int qscale= s->qscale;
-
- /* DC coef */
- component = (n <= 3 ? 0 : n - 4 + 1);
- diff = decode_dc(&s->gb, component);
- if (diff >= 0xffff)
- return -1;
- dc = s->last_dc[component];
- dc += diff;
- s->last_dc[component] = dc;
- block[0] = dc<<3;
- dprintf(s->avctx, "dc=%d diff=%d\n", dc, diff);
- i = 0;
- {
- OPEN_READER(re, &s->gb);
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- i += run;
- j = scantable[i];
- level= (level*qscale*quant_matrix[j])>>4;
- level= (level-1)|1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
- if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
- } else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
- }
- i += run;
- j = scantable[i];
- if(level<0){
- level= -level;
- level= (level*qscale*quant_matrix[j])>>4;
- level= (level-1)|1;
- level= -level;
- }else{
- level= (level*qscale*quant_matrix[j])>>4;
- level= (level-1)|1;
- }
- }
- if (i > 63){
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-static inline int mpeg1_decode_block_inter(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix= s->inter_matrix;
- const int qscale= s->qscale;
-
- {
- OPEN_READER(re, &s->gb);
- i = -1;
- /* special case for the first coef. no need to add a second vlc table */
- UPDATE_CACHE(re, &s->gb);
- if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
- level= (3*qscale*quant_matrix[0])>>5;
- level= (level-1)|1;
- if(GET_CACHE(re, &s->gb)&0x40000000)
- level= -level;
- block[0] = level;
- i++;
- SKIP_BITS(re, &s->gb, 2);
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- goto end;
- }
-
- /* now quantify & encode AC coefs */
- for(;;) {
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- level= (level-1)|1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
- if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
- } else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
- }
- i += run;
- j = scantable[i];
- if(level<0){
- level= -level;
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- level= (level-1)|1;
- level= -level;
- }else{
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- level= (level-1)|1;
- }
- }
- if (i > 63){
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- block[j] = level;
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- break;
- UPDATE_CACHE(re, &s->gb);
- }
-end:
- LAST_SKIP_BITS(re, &s->gb, 2);
- CLOSE_READER(re, &s->gb);
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
-{
- int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const int qscale= s->qscale;
-
- {
- OPEN_READER(re, &s->gb);
- i = -1;
- /* special case for the first coef. no need to add a second vlc table */
- UPDATE_CACHE(re, &s->gb);
- if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
- level= (3*qscale)>>1;
- level= (level-1)|1;
- if(GET_CACHE(re, &s->gb)&0x40000000)
- level= -level;
- block[0] = level;
- i++;
- SKIP_BITS(re, &s->gb, 2);
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- goto end;
- }
-
- /* now quantify & encode AC coefs */
- for(;;) {
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale)>>1;
- level= (level-1)|1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
- if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
- } else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
- }
- i += run;
- j = scantable[i];
- if(level<0){
- level= -level;
- level= ((level*2+1)*qscale)>>1;
- level= (level-1)|1;
- level= -level;
- }else{
- level= ((level*2+1)*qscale)>>1;
- level= (level-1)|1;
- }
- }
-
- block[j] = level;
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- break;
- UPDATE_CACHE(re, &s->gb);
- }
-end:
- LAST_SKIP_BITS(re, &s->gb, 2);
- CLOSE_READER(re, &s->gb);
- }
- s->block_last_index[n] = i;
- return 0;
-}
-
-
-static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix;
- const int qscale= s->qscale;
- int mismatch;
-
- mismatch = 1;
-
- {
- OPEN_READER(re, &s->gb);
- i = -1;
- if (n < 4)
- quant_matrix = s->inter_matrix;
- else
- quant_matrix = s->chroma_inter_matrix;
-
- /* special case for the first coef. no need to add a second vlc table */
- UPDATE_CACHE(re, &s->gb);
- if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
- level= (3*qscale*quant_matrix[0])>>5;
- if(GET_CACHE(re, &s->gb)&0x40000000)
- level= -level;
- block[0] = level;
- mismatch ^= level;
- i++;
- SKIP_BITS(re, &s->gb, 2);
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- goto end;
- }
-
- /* now quantify & encode AC coefs */
- for(;;) {
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
-
- i += run;
- j = scantable[i];
- if(level<0){
- level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
- level= -level;
- }else{
- level= ((level*2+1)*qscale*quant_matrix[j])>>5;
- }
- }
- if (i > 63){
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- mismatch ^= level;
- block[j] = level;
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- break;
- UPDATE_CACHE(re, &s->gb);
- }
-end:
- LAST_SKIP_BITS(re, &s->gb, 2);
- CLOSE_READER(re, &s->gb);
- }
- block[63] ^= (mismatch & 1);
-
- s->block_last_index[n] = i;
- return 0;
-}
-
-static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const int qscale= s->qscale;
- OPEN_READER(re, &s->gb);
- i = -1;
-
- /* special case for the first coef. no need to add a second vlc table */
- UPDATE_CACHE(re, &s->gb);
- if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
- level= (3*qscale)>>1;
- if(GET_CACHE(re, &s->gb)&0x40000000)
- level= -level;
- block[0] = level;
- i++;
- SKIP_BITS(re, &s->gb, 2);
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- goto end;
- }
-
- /* now quantify & encode AC coefs */
- for(;;) {
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level != 0) {
- i += run;
- j = scantable[i];
- level= ((level*2+1)*qscale)>>1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
-
- i += run;
- j = scantable[i];
- if(level<0){
- level= ((-level*2+1)*qscale)>>1;
- level= -level;
- }else{
- level= ((level*2+1)*qscale)>>1;
- }
- }
-
- block[j] = level;
- if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
- break;
- UPDATE_CACHE(re, &s->gb);
- }
-end:
- LAST_SKIP_BITS(re, &s->gb, 2);
- CLOSE_READER(re, &s->gb);
- s->block_last_index[n] = i;
- return 0;
-}
-
-
-static inline int mpeg2_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, dc, diff, i, j, run;
- int component;
- RLTable *rl;
- uint8_t * const scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix;
- const int qscale= s->qscale;
- int mismatch;
-
- /* DC coef */
- if (n < 4){
- quant_matrix = s->intra_matrix;
- component = 0;
- }else{
- quant_matrix = s->chroma_intra_matrix;
- component = (n&1) + 1;
- }
- diff = decode_dc(&s->gb, component);
- if (diff >= 0xffff)
- return -1;
- dc = s->last_dc[component];
- dc += diff;
- s->last_dc[component] = dc;
- block[0] = dc << (3 - s->intra_dc_precision);
- dprintf(s->avctx, "dc=%d\n", block[0]);
- mismatch = block[0] ^ 1;
- i = 0;
- if (s->intra_vlc_format)
- rl = &rl_mpeg2;
- else
- rl = &rl_mpeg1;
-
- {
- OPEN_READER(re, &s->gb);
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- i += run;
- j = scantable[i];
- level= (level*qscale*quant_matrix[j])>>4;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
- i += run;
- j = scantable[i];
- if(level<0){
- level= (-level*qscale*quant_matrix[j])>>4;
- level= -level;
- }else{
- level= (level*qscale*quant_matrix[j])>>4;
- }
- }
- if (i > 63){
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- mismatch^= level;
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- block[63]^= mismatch&1;
-
- s->block_last_index[n] = i;
- return 0;
-}
-
-static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int level, dc, diff, j, run;
- int component;
- RLTable *rl;
- uint8_t * scantable= s->intra_scantable.permutated;
- const uint16_t *quant_matrix;
- const int qscale= s->qscale;
-
- /* DC coef */
- if (n < 4){
- quant_matrix = s->intra_matrix;
- component = 0;
- }else{
- quant_matrix = s->chroma_intra_matrix;
- component = (n&1) + 1;
- }
- diff = decode_dc(&s->gb, component);
- if (diff >= 0xffff)
- return -1;
- dc = s->last_dc[component];
- dc += diff;
- s->last_dc[component] = dc;
- block[0] = dc << (3 - s->intra_dc_precision);
- if (s->intra_vlc_format)
- rl = &rl_mpeg2;
- else
- rl = &rl_mpeg1;
-
- {
- OPEN_READER(re, &s->gb);
- /* now quantify & encode AC coefs */
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if(level == 127){
- break;
- } else if(level != 0) {
- scantable += run;
- j = *scantable;
- level= (level*qscale*quant_matrix[j])>>4;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
- scantable += run;
- j = *scantable;
- if(level<0){
- level= (-level*qscale*quant_matrix[j])>>4;
- level= -level;
- }else{
- level= (level*qscale*quant_matrix[j])>>4;
- }
- }
-
- block[j] = level;