- } else if (mb_type < 8) { /* INTER */
- if (h->thirdpel_flag && h->halfpel_flag == !get_bits (&s->gb, 1)) {
- mode = THIRDPEL_MODE;
- } else if (h->halfpel_flag && h->thirdpel_flag == !get_bits (&s->gb, 1)) {
- mode = HALFPEL_MODE;
- } else {
- mode = FULLPEL_MODE;
- }
-
- /* fill caches */
- /* note ref_cache should contain here:
- ????????
- ???11111
- N??11111
- N??11111
- N??11111
- N
- */
-
- for (m=0; m < 2; m++) {
- if (s->mb_x > 0 && h->intra4x4_pred_mode[mb_xy - 1][0] != -1) {
- for (i=0; i < 4; i++) {
- *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - 1 + i*h->b_stride];
- }
- } else {
- for (i=0; i < 4; i++) {
- *(uint32_t *) h->mv_cache[m][scan8[0] - 1 + i*8] = 0;
- }
- }
- if (s->mb_y > 0) {
- memcpy (h->mv_cache[m][scan8[0] - 1*8], s->current_picture.motion_val[m][b_xy - h->b_stride], 4*2*sizeof(int16_t));
- memset (&h->ref_cache[m][scan8[0] - 1*8], (h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1, 4);
-
- if (s->mb_x < (s->mb_width - 1)) {
- *(uint32_t *) h->mv_cache[m][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride + 4];
- h->ref_cache[m][scan8[0] + 4 - 1*8] =
- (h->intra4x4_pred_mode[mb_xy - s->mb_stride + 1][0] == -1 ||
- h->intra4x4_pred_mode[mb_xy - s->mb_stride][4] == -1) ? PART_NOT_AVAILABLE : 1;
- }else
- h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE;
- if (s->mb_x > 0) {
- *(uint32_t *) h->mv_cache[m][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[m][b_xy - h->b_stride - 1];
- h->ref_cache[m][scan8[0] - 1 - 1*8] = (h->intra4x4_pred_mode[mb_xy - s->mb_stride - 1][3] == -1) ? PART_NOT_AVAILABLE : 1;
- }else
- h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE;
- }else
- memset (&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8);
-
- if (s->pict_type != B_TYPE)
- break;
- }
-
- /* decode motion vector(s) and form prediction(s) */
- if (s->pict_type == P_TYPE) {
- svq3_mc_dir (h, (mb_type - 1), mode, 0, 0);
- } else { /* B_TYPE */
- if (mb_type != 2) {
- svq3_mc_dir (h, 0, mode, 0, 0);
- } else {
- for (i=0; i < 4; i++) {
- memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
- }
- }
- if (mb_type != 1) {
- svq3_mc_dir (h, 0, mode, 1, (mb_type == 3));
- } else {
- for (i=0; i < 4; i++) {
- memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
- }
- }
- }
-
- mb_type = MB_TYPE_16x16;
- } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */
- memset (h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t));
-
- if (mb_type == 8) {
- if (s->mb_x > 0) {
- for (i=0; i < 4; i++) {
- h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[mb_xy - 1][i];
- }
- if (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) {
- h->left_samples_available = 0x5F5F;
- }
- }
- if (s->mb_y > 0) {
- h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][4];
- h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][5];
- h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][6];
- h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[mb_xy - s->mb_stride][3];
-
- if (h->intra4x4_pred_mode_cache[4+8*0] == -1) {
- h->top_samples_available = 0x33FF;
- }
- }
-
- /* decode prediction codes for luma blocks */
- for (i=0; i < 16; i+=2) {
- vlc = svq3_get_ue_golomb (&s->gb);
-
- if (vlc >= 25)
- return -1;
-
- left = &h->intra4x4_pred_mode_cache[scan8[i] - 1];
- top = &h->intra4x4_pred_mode_cache[scan8[i] - 8];
-
- left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];
- left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];
-
- if (left[1] == -1 || left[2] == -1)
- return -1;
- }
- } else { /* mb_type == 33, DC_128_PRED block type */
- for (i=0; i < 4; i++) {
- memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4);
- }
- }
-
- write_back_intra_pred_mode (h);
-
- if (mb_type == 8) {
- check_intra4x4_pred_mode (h);
-
- h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF;
- h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;
- } else {
- for (i=0; i < 4; i++) {
- memset (&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4);
- }
-
- h->top_samples_available = 0x33FF;
- h->left_samples_available = 0x5F5F;
- }
-
- mb_type = MB_TYPE_INTRA4x4;
- } else { /* INTRA16x16 */
- dir = i_mb_type_info[mb_type - 8].pred_mode;
- dir = (dir >> 1) ^ 3*(dir & 1) ^ 1;
-
- if ((h->intra16x16_pred_mode = check_intra_pred_mode (h, dir)) == -1)
- return -1;
-
- cbp = i_mb_type_info[mb_type - 8].cbp;
- mb_type = MB_TYPE_INTRA16x16;
- }
-
- if (!IS_INTER(mb_type) && s->pict_type != I_TYPE) {
- for (i=0; i < 4; i++) {
- memset (s->current_picture.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
- }
- if (s->pict_type == B_TYPE) {
- for (i=0; i < 4; i++) {
- memset (s->current_picture.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t));
- }
- }
- }
- if (!IS_INTRA4x4(mb_type)) {
- memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8);
- }
- if (!IS_SKIP(mb_type) || s->pict_type == B_TYPE) {
- memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t));
- s->dsp.clear_blocks(h->mb);
- }
-
- if (!IS_INTRA16x16(mb_type) && (!IS_SKIP(mb_type) || s->pict_type == B_TYPE)) {
- if ((vlc = svq3_get_ue_golomb (&s->gb)) >= 48)
- return -1;
-
- cbp = IS_INTRA(mb_type) ? golomb_to_intra4x4_cbp[vlc] : golomb_to_inter_cbp[vlc];
- }
- if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) {
- s->qscale += svq3_get_se_golomb (&s->gb);
-
- if (s->qscale > 31)
- return -1;
- }
- if (IS_INTRA16x16(mb_type)) {
- if (svq3_decode_block (&s->gb, h->mb, 0, 0))
- return -1;
- }
-
- if (cbp) {
- const int index = IS_INTRA16x16(mb_type) ? 1 : 0;
- const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);
-
- for (i=0; i < 4; i++) {
- if ((cbp & (1 << i))) {
- for (j=0; j < 4; j++) {
- k = index ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j);
- h->non_zero_count_cache[ scan8[k] ] = 1;
-
- if (svq3_decode_block (&s->gb, &h->mb[16*k], index, type))
- return -1;
- }
- }
- }
-
- if ((cbp & 0x30)) {
- for (i=0; i < 2; ++i) {
- if (svq3_decode_block (&s->gb, &h->mb[16*(16 + 4*i)], 0, 3))
- return -1;
- }
-
- if ((cbp & 0x20)) {
- for (i=0; i < 8; i++) {
- h->non_zero_count_cache[ scan8[16+i] ] = 1;
-
- if (svq3_decode_block (&s->gb, &h->mb[16*(16 + i)], 1, 1))
- return -1;
- }
- }
- }
- }
-
- s->current_picture.mb_type[mb_xy] = mb_type;
-
- if (IS_INTRA(mb_type)) {
- h->chroma_pred_mode = check_intra_pred_mode (h, DC_PRED8x8);
- }
-
- return 0;
-}
-
-static int svq3_decode_slice_header (H264Context *h) {
- MpegEncContext *const s = (MpegEncContext *) h;
- const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
- int i, header;