+static void fill_decode_neighbors(const H264Context *h, H264SliceContext *sl, int mb_type)
+{
+ const int mb_xy = sl->mb_xy;
+ int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];
+ static const uint8_t left_block_options[4][32] = {
+ { 0, 1, 2, 3, 7, 10, 8, 11, 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4, 3 + 3 * 4, 1 + 4 * 4, 1 + 8 * 4, 1 + 5 * 4, 1 + 9 * 4 },
+ { 2, 2, 3, 3, 8, 11, 8, 11, 3 + 2 * 4, 3 + 2 * 4, 3 + 3 * 4, 3 + 3 * 4, 1 + 5 * 4, 1 + 9 * 4, 1 + 5 * 4, 1 + 9 * 4 },
+ { 0, 0, 1, 1, 7, 10, 7, 10, 3 + 0 * 4, 3 + 0 * 4, 3 + 1 * 4, 3 + 1 * 4, 1 + 4 * 4, 1 + 8 * 4, 1 + 4 * 4, 1 + 8 * 4 },
+ { 0, 2, 0, 2, 7, 10, 7, 10, 3 + 0 * 4, 3 + 2 * 4, 3 + 0 * 4, 3 + 2 * 4, 1 + 4 * 4, 1 + 8 * 4, 1 + 4 * 4, 1 + 8 * 4 }
+ };
+
+ sl->topleft_partition = -1;
+
+ top_xy = mb_xy - (h->mb_stride << MB_FIELD(sl));
+
+ /* Wow, what a mess, why didn't they simplify the interlacing & intra
+ * stuff, I can't imagine that these complex rules are worth it. */
+
+ topleft_xy = top_xy - 1;
+ topright_xy = top_xy + 1;
+ left_xy[LBOT] = left_xy[LTOP] = mb_xy - 1;
+ sl->left_block = left_block_options[0];
+ if (FRAME_MBAFF(h)) {
+ const int left_mb_field_flag = IS_INTERLACED(h->cur_pic.mb_type[mb_xy - 1]);
+ const int curr_mb_field_flag = IS_INTERLACED(mb_type);
+ if (sl->mb_y & 1) {
+ if (left_mb_field_flag != curr_mb_field_flag) {
+ left_xy[LBOT] = left_xy[LTOP] = mb_xy - h->mb_stride - 1;
+ if (curr_mb_field_flag) {
+ left_xy[LBOT] += h->mb_stride;
+ sl->left_block = left_block_options[3];
+ } else {
+ topleft_xy += h->mb_stride;
+ /* take top left mv from the middle of the mb, as opposed
+ * to all other modes which use the bottom right partition */
+ sl->topleft_partition = 0;
+ sl->left_block = left_block_options[1];
+ }
+ }
+ } else {
+ if (curr_mb_field_flag) {
+ topleft_xy += h->mb_stride & (((h->cur_pic.mb_type[top_xy - 1] >> 7) & 1) - 1);
+ topright_xy += h->mb_stride & (((h->cur_pic.mb_type[top_xy + 1] >> 7) & 1) - 1);
+ top_xy += h->mb_stride & (((h->cur_pic.mb_type[top_xy] >> 7) & 1) - 1);
+ }
+ if (left_mb_field_flag != curr_mb_field_flag) {
+ if (curr_mb_field_flag) {
+ left_xy[LBOT] += h->mb_stride;
+ sl->left_block = left_block_options[3];
+ } else {
+ sl->left_block = left_block_options[2];
+ }
+ }
+ }
+ }
+
+ sl->topleft_mb_xy = topleft_xy;
+ sl->top_mb_xy = top_xy;
+ sl->topright_mb_xy = topright_xy;
+ sl->left_mb_xy[LTOP] = left_xy[LTOP];
+ sl->left_mb_xy[LBOT] = left_xy[LBOT];
+ //FIXME do we need all in the context?
+
+ sl->topleft_type = h->cur_pic.mb_type[topleft_xy];
+ sl->top_type = h->cur_pic.mb_type[top_xy];
+ sl->topright_type = h->cur_pic.mb_type[topright_xy];
+ sl->left_type[LTOP] = h->cur_pic.mb_type[left_xy[LTOP]];
+ sl->left_type[LBOT] = h->cur_pic.mb_type[left_xy[LBOT]];
+
+ if (FMO) {
+ if (h->slice_table[topleft_xy] != sl->slice_num)
+ sl->topleft_type = 0;
+ if (h->slice_table[top_xy] != sl->slice_num)
+ sl->top_type = 0;
+ if (h->slice_table[left_xy[LTOP]] != sl->slice_num)
+ sl->left_type[LTOP] = sl->left_type[LBOT] = 0;
+ } else {
+ if (h->slice_table[topleft_xy] != sl->slice_num) {
+ sl->topleft_type = 0;
+ if (h->slice_table[top_xy] != sl->slice_num)
+ sl->top_type = 0;
+ if (h->slice_table[left_xy[LTOP]] != sl->slice_num)
+ sl->left_type[LTOP] = sl->left_type[LBOT] = 0;
+ }
+ }
+ if (h->slice_table[topright_xy] != sl->slice_num)
+ sl->topright_type = 0;
+}
+
+static void fill_decode_caches(const H264Context *h, H264SliceContext *sl, int mb_type)
+{
+ int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];
+ int topleft_type, top_type, topright_type, left_type[LEFT_MBS];
+ const uint8_t *left_block = sl->left_block;
+ int i;
+ uint8_t *nnz;
+ uint8_t *nnz_cache;
+
+ topleft_xy = sl->topleft_mb_xy;
+ top_xy = sl->top_mb_xy;
+ topright_xy = sl->topright_mb_xy;
+ left_xy[LTOP] = sl->left_mb_xy[LTOP];
+ left_xy[LBOT] = sl->left_mb_xy[LBOT];
+ topleft_type = sl->topleft_type;
+ top_type = sl->top_type;
+ topright_type = sl->topright_type;
+ left_type[LTOP] = sl->left_type[LTOP];
+ left_type[LBOT] = sl->left_type[LBOT];
+
+ if (!IS_SKIP(mb_type)) {
+ if (IS_INTRA(mb_type)) {
+ int type_mask = h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
+ sl->topleft_samples_available =
+ sl->top_samples_available =
+ sl->left_samples_available = 0xFFFF;
+ sl->topright_samples_available = 0xEEEA;
+
+ if (!(top_type & type_mask)) {
+ sl->topleft_samples_available = 0xB3FF;
+ sl->top_samples_available = 0x33FF;
+ sl->topright_samples_available = 0x26EA;
+ }
+ if (IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[LTOP])) {
+ if (IS_INTERLACED(mb_type)) {
+ if (!(left_type[LTOP] & type_mask)) {
+ sl->topleft_samples_available &= 0xDFFF;
+ sl->left_samples_available &= 0x5FFF;
+ }
+ if (!(left_type[LBOT] & type_mask)) {
+ sl->topleft_samples_available &= 0xFF5F;
+ sl->left_samples_available &= 0xFF5F;
+ }
+ } else {
+ int left_typei = h->cur_pic.mb_type[left_xy[LTOP] + h->mb_stride];
+
+ assert(left_xy[LTOP] == left_xy[LBOT]);
+ if (!((left_typei & type_mask) && (left_type[LTOP] & type_mask))) {
+ sl->topleft_samples_available &= 0xDF5F;
+ sl->left_samples_available &= 0x5F5F;
+ }
+ }
+ } else {
+ if (!(left_type[LTOP] & type_mask)) {
+ sl->topleft_samples_available &= 0xDF5F;
+ sl->left_samples_available &= 0x5F5F;
+ }
+ }
+
+ if (!(topleft_type & type_mask))
+ sl->topleft_samples_available &= 0x7FFF;
+
+ if (!(topright_type & type_mask))
+ sl->topright_samples_available &= 0xFBFF;
+
+ if (IS_INTRA4x4(mb_type)) {
+ if (IS_INTRA4x4(top_type)) {
+ AV_COPY32(sl->intra4x4_pred_mode_cache + 4 + 8 * 0, sl->intra4x4_pred_mode + h->mb2br_xy[top_xy]);
+ } else {
+ sl->intra4x4_pred_mode_cache[4 + 8 * 0] =
+ sl->intra4x4_pred_mode_cache[5 + 8 * 0] =
+ sl->intra4x4_pred_mode_cache[6 + 8 * 0] =
+ sl->intra4x4_pred_mode_cache[7 + 8 * 0] = 2 - 3 * !(top_type & type_mask);
+ }
+ for (i = 0; i < 2; i++) {
+ if (IS_INTRA4x4(left_type[LEFT(i)])) {
+ int8_t *mode = sl->intra4x4_pred_mode + h->mb2br_xy[left_xy[LEFT(i)]];
+ sl->intra4x4_pred_mode_cache[3 + 8 * 1 + 2 * 8 * i] = mode[6 - left_block[0 + 2 * i]];
+ sl->intra4x4_pred_mode_cache[3 + 8 * 2 + 2 * 8 * i] = mode[6 - left_block[1 + 2 * i]];
+ } else {
+ sl->intra4x4_pred_mode_cache[3 + 8 * 1 + 2 * 8 * i] =
+ sl->intra4x4_pred_mode_cache[3 + 8 * 2 + 2 * 8 * i] = 2 - 3 * !(left_type[LEFT(i)] & type_mask);
+ }
+ }
+ }
+ }
+
+ /*
+ * 0 . T T. T T T T
+ * 1 L . .L . . . .
+ * 2 L . .L . . . .
+ * 3 . T TL . . . .
+ * 4 L . .L . . . .
+ * 5 L . .. . . . .
+ */
+ /* FIXME: constraint_intra_pred & partitioning & nnz
+ * (let us hope this is just a typo in the spec) */
+ nnz_cache = sl->non_zero_count_cache;
+ if (top_type) {
+ nnz = h->non_zero_count[top_xy];
+ AV_COPY32(&nnz_cache[4 + 8 * 0], &nnz[4 * 3]);
+ if (!h->chroma_y_shift) {
+ AV_COPY32(&nnz_cache[4 + 8 * 5], &nnz[4 * 7]);
+ AV_COPY32(&nnz_cache[4 + 8 * 10], &nnz[4 * 11]);
+ } else {
+ AV_COPY32(&nnz_cache[4 + 8 * 5], &nnz[4 * 5]);
+ AV_COPY32(&nnz_cache[4 + 8 * 10], &nnz[4 * 9]);
+ }
+ } else {
+ uint32_t top_empty = CABAC(h) && !IS_INTRA(mb_type) ? 0 : 0x40404040;
+ AV_WN32A(&nnz_cache[4 + 8 * 0], top_empty);
+ AV_WN32A(&nnz_cache[4 + 8 * 5], top_empty);
+ AV_WN32A(&nnz_cache[4 + 8 * 10], top_empty);
+ }
+
+ for (i = 0; i < 2; i++) {
+ if (left_type[LEFT(i)]) {
+ nnz = h->non_zero_count[left_xy[LEFT(i)]];
+ nnz_cache[3 + 8 * 1 + 2 * 8 * i] = nnz[left_block[8 + 0 + 2 * i]];
+ nnz_cache[3 + 8 * 2 + 2 * 8 * i] = nnz[left_block[8 + 1 + 2 * i]];
+ if (CHROMA444(h)) {
+ nnz_cache[3 + 8 * 6 + 2 * 8 * i] = nnz[left_block[8 + 0 + 2 * i] + 4 * 4];
+ nnz_cache[3 + 8 * 7 + 2 * 8 * i] = nnz[left_block[8 + 1 + 2 * i] + 4 * 4];
+ nnz_cache[3 + 8 * 11 + 2 * 8 * i] = nnz[left_block[8 + 0 + 2 * i] + 8 * 4];
+ nnz_cache[3 + 8 * 12 + 2 * 8 * i] = nnz[left_block[8 + 1 + 2 * i] + 8 * 4];
+ } else if (CHROMA422(h)) {
+ nnz_cache[3 + 8 * 6 + 2 * 8 * i] = nnz[left_block[8 + 0 + 2 * i] - 2 + 4 * 4];
+ nnz_cache[3 + 8 * 7 + 2 * 8 * i] = nnz[left_block[8 + 1 + 2 * i] - 2 + 4 * 4];
+ nnz_cache[3 + 8 * 11 + 2 * 8 * i] = nnz[left_block[8 + 0 + 2 * i] - 2 + 8 * 4];
+ nnz_cache[3 + 8 * 12 + 2 * 8 * i] = nnz[left_block[8 + 1 + 2 * i] - 2 + 8 * 4];
+ } else {
+ nnz_cache[3 + 8 * 6 + 8 * i] = nnz[left_block[8 + 4 + 2 * i]];
+ nnz_cache[3 + 8 * 11 + 8 * i] = nnz[left_block[8 + 5 + 2 * i]];
+ }
+ } else {
+ nnz_cache[3 + 8 * 1 + 2 * 8 * i] =
+ nnz_cache[3 + 8 * 2 + 2 * 8 * i] =
+ nnz_cache[3 + 8 * 6 + 2 * 8 * i] =
+ nnz_cache[3 + 8 * 7 + 2 * 8 * i] =
+ nnz_cache[3 + 8 * 11 + 2 * 8 * i] =
+ nnz_cache[3 + 8 * 12 + 2 * 8 * i] = CABAC(h) && !IS_INTRA(mb_type) ? 0 : 64;
+ }
+ }
+
+ if (CABAC(h)) {
+ // top_cbp
+ if (top_type)
+ sl->top_cbp = h->cbp_table[top_xy];
+ else
+ sl->top_cbp = IS_INTRA(mb_type) ? 0x7CF : 0x00F;
+ // left_cbp
+ if (left_type[LTOP]) {
+ sl->left_cbp = (h->cbp_table[left_xy[LTOP]] & 0x7F0) |
+ ((h->cbp_table[left_xy[LTOP]] >> (left_block[0] & (~1))) & 2) |
+ (((h->cbp_table[left_xy[LBOT]] >> (left_block[2] & (~1))) & 2) << 2);
+ } else {
+ sl->left_cbp = IS_INTRA(mb_type) ? 0x7CF : 0x00F;
+ }
+ }
+ }
+
+ if (IS_INTER(mb_type) || (IS_DIRECT(mb_type) && sl->direct_spatial_mv_pred)) {
+ int list;
+ int b_stride = h->b_stride;
+ for (list = 0; list < sl->list_count; list++) {
+ int8_t *ref_cache = &sl->ref_cache[list][scan8[0]];
+ int8_t *ref = h->cur_pic.ref_index[list];
+ int16_t(*mv_cache)[2] = &sl->mv_cache[list][scan8[0]];
+ int16_t(*mv)[2] = h->cur_pic.motion_val[list];
+ if (!USES_LIST(mb_type, list))
+ continue;
+ assert(!(IS_DIRECT(mb_type) && !sl->direct_spatial_mv_pred));
+
+ if (USES_LIST(top_type, list)) {
+ const int b_xy = h->mb2b_xy[top_xy] + 3 * b_stride;
+ AV_COPY128(mv_cache[0 - 1 * 8], mv[b_xy + 0]);
+ ref_cache[0 - 1 * 8] =
+ ref_cache[1 - 1 * 8] = ref[4 * top_xy + 2];
+ ref_cache[2 - 1 * 8] =
+ ref_cache[3 - 1 * 8] = ref[4 * top_xy + 3];
+ } else {
+ AV_ZERO128(mv_cache[0 - 1 * 8]);
+ AV_WN32A(&ref_cache[0 - 1 * 8],
+ ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE) & 0xFF) * 0x01010101u);
+ }
+
+ if (mb_type & (MB_TYPE_16x8 | MB_TYPE_8x8)) {
+ for (i = 0; i < 2; i++) {
+ int cache_idx = -1 + i * 2 * 8;
+ if (USES_LIST(left_type[LEFT(i)], list)) {
+ const int b_xy = h->mb2b_xy[left_xy[LEFT(i)]] + 3;
+ const int b8_xy = 4 * left_xy[LEFT(i)] + 1;
+ AV_COPY32(mv_cache[cache_idx],
+ mv[b_xy + b_stride * left_block[0 + i * 2]]);
+ AV_COPY32(mv_cache[cache_idx + 8],
+ mv[b_xy + b_stride * left_block[1 + i * 2]]);
+ ref_cache[cache_idx] = ref[b8_xy + (left_block[0 + i * 2] & ~1)];
+ ref_cache[cache_idx + 8] = ref[b8_xy + (left_block[1 + i * 2] & ~1)];
+ } else {
+ AV_ZERO32(mv_cache[cache_idx]);
+ AV_ZERO32(mv_cache[cache_idx + 8]);
+ ref_cache[cache_idx] =
+ ref_cache[cache_idx + 8] = (left_type[LEFT(i)]) ? LIST_NOT_USED
+ : PART_NOT_AVAILABLE;
+ }
+ }
+ } else {
+ if (USES_LIST(left_type[LTOP], list)) {
+ const int b_xy = h->mb2b_xy[left_xy[LTOP]] + 3;
+ const int b8_xy = 4 * left_xy[LTOP] + 1;
+ AV_COPY32(mv_cache[-1], mv[b_xy + b_stride * left_block[0]]);
+ ref_cache[-1] = ref[b8_xy + (left_block[0] & ~1)];
+ } else {
+ AV_ZERO32(mv_cache[-1]);
+ ref_cache[-1] = left_type[LTOP] ? LIST_NOT_USED
+ : PART_NOT_AVAILABLE;
+ }
+ }
+
+ if (USES_LIST(topright_type, list)) {
+ const int b_xy = h->mb2b_xy[topright_xy] + 3 * b_stride;
+ AV_COPY32(mv_cache[4 - 1 * 8], mv[b_xy]);
+ ref_cache[4 - 1 * 8] = ref[4 * topright_xy + 2];
+ } else {
+ AV_ZERO32(mv_cache[4 - 1 * 8]);
+ ref_cache[4 - 1 * 8] = topright_type ? LIST_NOT_USED
+ : PART_NOT_AVAILABLE;
+ }
+ if (ref_cache[4 - 1 * 8] < 0) {
+ if (USES_LIST(topleft_type, list)) {
+ const int b_xy = h->mb2b_xy[topleft_xy] + 3 + b_stride +
+ (sl->topleft_partition & 2 * b_stride);
+ const int b8_xy = 4 * topleft_xy + 1 + (sl->topleft_partition & 2);
+ AV_COPY32(mv_cache[-1 - 1 * 8], mv[b_xy]);
+ ref_cache[-1 - 1 * 8] = ref[b8_xy];
+ } else {
+ AV_ZERO32(mv_cache[-1 - 1 * 8]);
+ ref_cache[-1 - 1 * 8] = topleft_type ? LIST_NOT_USED
+ : PART_NOT_AVAILABLE;
+ }
+ }
+
+ if ((mb_type & (MB_TYPE_SKIP | MB_TYPE_DIRECT2)) && !FRAME_MBAFF(h))
+ continue;
+
+ if (!(mb_type & (MB_TYPE_SKIP | MB_TYPE_DIRECT2))) {
+ uint8_t(*mvd_cache)[2] = &sl->mvd_cache[list][scan8[0]];
+ uint8_t(*mvd)[2] = sl->mvd_table[list];
+ ref_cache[2 + 8 * 0] =
+ ref_cache[2 + 8 * 2] = PART_NOT_AVAILABLE;
+ AV_ZERO32(mv_cache[2 + 8 * 0]);
+ AV_ZERO32(mv_cache[2 + 8 * 2]);
+
+ if (CABAC(h)) {
+ if (USES_LIST(top_type, list)) {
+ const int b_xy = h->mb2br_xy[top_xy];
+ AV_COPY64(mvd_cache[0 - 1 * 8], mvd[b_xy + 0]);
+ } else {
+ AV_ZERO64(mvd_cache[0 - 1 * 8]);
+ }
+ if (USES_LIST(left_type[LTOP], list)) {
+ const int b_xy = h->mb2br_xy[left_xy[LTOP]] + 6;
+ AV_COPY16(mvd_cache[-1 + 0 * 8], mvd[b_xy - left_block[0]]);
+ AV_COPY16(mvd_cache[-1 + 1 * 8], mvd[b_xy - left_block[1]]);
+ } else {
+ AV_ZERO16(mvd_cache[-1 + 0 * 8]);
+ AV_ZERO16(mvd_cache[-1 + 1 * 8]);
+ }
+ if (USES_LIST(left_type[LBOT], list)) {
+ const int b_xy = h->mb2br_xy[left_xy[LBOT]] + 6;
+ AV_COPY16(mvd_cache[-1 + 2 * 8], mvd[b_xy - left_block[2]]);
+ AV_COPY16(mvd_cache[-1 + 3 * 8], mvd[b_xy - left_block[3]]);
+ } else {
+ AV_ZERO16(mvd_cache[-1 + 2 * 8]);
+ AV_ZERO16(mvd_cache[-1 + 3 * 8]);
+ }
+ AV_ZERO16(mvd_cache[2 + 8 * 0]);
+ AV_ZERO16(mvd_cache[2 + 8 * 2]);
+ if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
+ uint8_t *direct_cache = &sl->direct_cache[scan8[0]];
+ uint8_t *direct_table = h->direct_table;
+ fill_rectangle(direct_cache, 4, 4, 8, MB_TYPE_16x16 >> 1, 1);
+
+ if (IS_DIRECT(top_type)) {
+ AV_WN32A(&direct_cache[-1 * 8],
+ 0x01010101u * (MB_TYPE_DIRECT2 >> 1));
+ } else if (IS_8X8(top_type)) {
+ int b8_xy = 4 * top_xy;
+ direct_cache[0 - 1 * 8] = direct_table[b8_xy + 2];
+ direct_cache[2 - 1 * 8] = direct_table[b8_xy + 3];
+ } else {
+ AV_WN32A(&direct_cache[-1 * 8],
+ 0x01010101 * (MB_TYPE_16x16 >> 1));
+ }
+
+ if (IS_DIRECT(left_type[LTOP]))
+ direct_cache[-1 + 0 * 8] = MB_TYPE_DIRECT2 >> 1;
+ else if (IS_8X8(left_type[LTOP]))
+ direct_cache[-1 + 0 * 8] = direct_table[4 * left_xy[LTOP] + 1 + (left_block[0] & ~1)];
+ else
+ direct_cache[-1 + 0 * 8] = MB_TYPE_16x16 >> 1;
+
+ if (IS_DIRECT(left_type[LBOT]))
+ direct_cache[-1 + 2 * 8] = MB_TYPE_DIRECT2 >> 1;
+ else if (IS_8X8(left_type[LBOT]))
+ direct_cache[-1 + 2 * 8] = direct_table[4 * left_xy[LBOT] + 1 + (left_block[2] & ~1)];
+ else
+ direct_cache[-1 + 2 * 8] = MB_TYPE_16x16 >> 1;
+ }
+ }
+ }
+
+#define MAP_MVS \
+ MAP_F2F(scan8[0] - 1 - 1 * 8, topleft_type) \
+ MAP_F2F(scan8[0] + 0 - 1 * 8, top_type) \
+ MAP_F2F(scan8[0] + 1 - 1 * 8, top_type) \
+ MAP_F2F(scan8[0] + 2 - 1 * 8, top_type) \
+ MAP_F2F(scan8[0] + 3 - 1 * 8, top_type) \
+ MAP_F2F(scan8[0] + 4 - 1 * 8, topright_type) \
+ MAP_F2F(scan8[0] - 1 + 0 * 8, left_type[LTOP]) \
+ MAP_F2F(scan8[0] - 1 + 1 * 8, left_type[LTOP]) \
+ MAP_F2F(scan8[0] - 1 + 2 * 8, left_type[LBOT]) \
+ MAP_F2F(scan8[0] - 1 + 3 * 8, left_type[LBOT])
+
+ if (FRAME_MBAFF(h)) {
+ if (MB_FIELD(sl)) {
+
+#define MAP_F2F(idx, mb_type) \
+ if (!IS_INTERLACED(mb_type) && sl->ref_cache[list][idx] >= 0) { \
+ sl->ref_cache[list][idx] <<= 1; \
+ sl->mv_cache[list][idx][1] /= 2; \
+ sl->mvd_cache[list][idx][1] >>= 1; \
+ }
+
+ MAP_MVS
+ } else {
+
+#undef MAP_F2F
+#define MAP_F2F(idx, mb_type) \
+ if (IS_INTERLACED(mb_type) && sl->ref_cache[list][idx] >= 0) { \
+ sl->ref_cache[list][idx] >>= 1; \
+ sl->mv_cache[list][idx][1] <<= 1; \
+ sl->mvd_cache[list][idx][1] <<= 1; \
+ }
+
+ MAP_MVS
+#undef MAP_F2F
+ }
+ }
+ }
+ }
+
+ sl->neighbor_transform_size = !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[LTOP]);
+}
+
+/**
+ * decodes a P_SKIP or B_SKIP macroblock
+ */
+static void av_unused decode_mb_skip(const H264Context *h, H264SliceContext *sl)
+{
+ const int mb_xy = sl->mb_xy;
+ int mb_type = 0;
+
+ memset(h->non_zero_count[mb_xy], 0, 48);
+
+ if (MB_FIELD(sl))
+ mb_type |= MB_TYPE_INTERLACED;
+
+ if (sl->slice_type_nos == AV_PICTURE_TYPE_B) {
+ // just for fill_caches. pred_direct_motion will set the real mb_type
+ mb_type |= MB_TYPE_L0L1 | MB_TYPE_DIRECT2 | MB_TYPE_SKIP;
+ if (sl->direct_spatial_mv_pred) {
+ fill_decode_neighbors(h, sl, mb_type);
+ fill_decode_caches(h, sl, mb_type); //FIXME check what is needed and what not ...
+ }
+ ff_h264_pred_direct_motion(h, sl, &mb_type);
+ mb_type |= MB_TYPE_SKIP;
+ } else {
+ mb_type |= MB_TYPE_16x16 | MB_TYPE_P0L0 | MB_TYPE_P1L0 | MB_TYPE_SKIP;
+
+ fill_decode_neighbors(h, sl, mb_type);
+ pred_pskip_motion(h, sl);
+ }
+
+ write_back_motion(h, sl, mb_type);
+ h->cur_pic.mb_type[mb_xy] = mb_type;
+ h->cur_pic.qscale_table[mb_xy] = sl->qscale;
+ h->slice_table[mb_xy] = sl->slice_num;
+ sl->prev_mb_skipped = 1;
+}
+