ref: a23757633d456fe4b5018c1e68a6dc05619ef6f5
parent: 26e24b1dd73a53e46122093b151df7367aac72ce
author: Dmitry Kovalev <dkovalev@google.com>
date: Thu Jun 6 08:33:12 EDT 2013
Moving segmentation and tile info to uncompressed header. Change-Id: I0ca77329d882a2026f6c1941b8e447d86bc87bda
--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -117,13 +117,8 @@
return word;
}
-static int decode_unsigned_max(vp9_reader *r, int max) {- int data = 0, bit = 0, lmax = max;
-
- while (lmax) {- data |= vp9_read_bit(r) << bit++;
- lmax >>= 1;
- }
+static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {+ const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));
return data > max ? max : data;
}
@@ -566,53 +561,56 @@
}
static void read_coef_probs(VP9D_COMP *pbi, vp9_reader *r) {- const TXFM_MODE mode = pbi->common.txfm_mode;
+ const TXFM_MODE txfm_mode = pbi->common.txfm_mode;
FRAME_CONTEXT *const fc = &pbi->common.fc;
read_coef_probs_common(fc, TX_4X4, r);
- if (mode > ONLY_4X4)
+ if (txfm_mode > ONLY_4X4)
read_coef_probs_common(fc, TX_8X8, r);
- if (mode > ALLOW_8X8)
+ if (txfm_mode > ALLOW_8X8)
read_coef_probs_common(fc, TX_16X16, r);
- if (mode > ALLOW_16X16)
+ if (txfm_mode > ALLOW_16X16)
read_coef_probs_common(fc, TX_32X32, r);
}
-static void setup_segmentation(VP9_COMMON *pc, MACROBLOCKD *xd, vp9_reader *r) {+static void setup_segmentation(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) {int i, j;
+ VP9_COMMON *const cm = &pbi->common;
+ MACROBLOCKD *const xd = &pbi->mb;
+
xd->update_mb_segmentation_map = 0;
xd->update_mb_segmentation_data = 0;
- xd->segmentation_enabled = vp9_read_bit(r);
+ xd->segmentation_enabled = vp9_rb_read_bit(rb);
if (!xd->segmentation_enabled)
return;
// Segmentation map update
- xd->update_mb_segmentation_map = vp9_read_bit(r);
+ xd->update_mb_segmentation_map = vp9_rb_read_bit(rb);
if (xd->update_mb_segmentation_map) {for (i = 0; i < MB_SEG_TREE_PROBS; i++)
- xd->mb_segment_tree_probs[i] = vp9_read_bit(r) ? vp9_read_prob(r)
- : MAX_PROB;
+ xd->mb_segment_tree_probs[i] = vp9_rb_read_bit(rb) ?
+ vp9_rb_read_literal(rb, 8) : MAX_PROB;
- pc->temporal_update = vp9_read_bit(r);
- if (pc->temporal_update) {+ cm->temporal_update = vp9_rb_read_bit(rb);
+ if (cm->temporal_update) {for (i = 0; i < PREDICTION_PROBS; i++)
- pc->segment_pred_probs[i] = vp9_read_bit(r) ? vp9_read_prob(r)
- : MAX_PROB;
+ cm->segment_pred_probs[i] = vp9_rb_read_bit(rb) ?
+ vp9_rb_read_literal(rb, 8) : MAX_PROB;
} else {for (i = 0; i < PREDICTION_PROBS; i++)
- pc->segment_pred_probs[i] = MAX_PROB;
+ cm->segment_pred_probs[i] = MAX_PROB;
}
}
// Segmentation data update
- xd->update_mb_segmentation_data = vp9_read_bit(r);
+ xd->update_mb_segmentation_data = vp9_rb_read_bit(rb);
if (xd->update_mb_segmentation_data) {- xd->mb_segment_abs_delta = vp9_read_bit(r);
+ xd->mb_segment_abs_delta = vp9_rb_read_bit(rb);
vp9_clearall_segfeatures(xd);
@@ -619,12 +617,12 @@
for (i = 0; i < MAX_MB_SEGMENTS; i++) { for (j = 0; j < SEG_LVL_MAX; j++) {int data = 0;
- const int feature_enabled = vp9_read_bit(r);
+ const int feature_enabled = vp9_rb_read_bit(rb);
if (feature_enabled) {vp9_enable_segfeature(xd, i, j);
- data = decode_unsigned_max(r, vp9_seg_feature_data_max(j));
+ data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));
if (vp9_is_segfeature_signed(j))
- data = vp9_read_and_apply_sign(r, data);
+ data = vp9_rb_read_bit(rb) ? -data : data;
}
vp9_set_segdata(xd, i, j, data);
}
@@ -676,8 +674,10 @@
}
static void setup_quantization(VP9D_COMP *pbi, struct vp9_read_bit_buffer *rb) {+ MACROBLOCKD *const xd = &pbi->mb;
VP9_COMMON *const cm = &pbi->common;
int update = 0;
+
cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);
update |= read_delta_q(rb, &cm->y_dc_delta_q);
update |= read_delta_q(rb, &cm->uv_dc_delta_q);
@@ -684,6 +684,20 @@
update |= read_delta_q(rb, &cm->uv_ac_delta_q);
if (update)
vp9_init_dequantizer(cm);
+
+ xd->lossless = cm->base_qindex == 0 &&
+ cm->y_dc_delta_q == 0 &&
+ cm->uv_dc_delta_q == 0 &&
+ cm->uv_ac_delta_q == 0;
+ if (xd->lossless) {+ xd->itxm_add = vp9_idct_add_lossless_c;
+ xd->itxm_add_y_block = vp9_idct_add_y_block_lossless_c;
+ xd->itxm_add_uv_block = vp9_idct_add_uv_block_lossless_c;
+ } else {+ xd->itxm_add = vp9_idct_add;
+ xd->itxm_add_y_block = vp9_idct_add_y_block;
+ xd->itxm_add_uv_block = vp9_idct_add_uv_block;
+ }
}
static INTERPOLATIONFILTERTYPE read_interp_filter_type(
@@ -787,28 +801,34 @@
}
}
-static void decode_tiles(VP9D_COMP *pbi,
- const uint8_t *data, int first_partition_size,
- vp9_reader *header_bc, vp9_reader *residual_bc) {- VP9_COMMON *const pc = &pbi->common;
+static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {+ int delta_log2_tiles;
- const uint8_t *data_ptr = data + first_partition_size;
- int tile_row, tile_col, delta_log2_tiles;
-
- vp9_get_tile_n_bits(pc, &pc->log2_tile_columns, &delta_log2_tiles);
+ vp9_get_tile_n_bits(cm, &cm->log2_tile_columns, &delta_log2_tiles);
while (delta_log2_tiles--) {- if (vp9_read_bit(header_bc)) {- pc->log2_tile_columns++;
+ if (vp9_rb_read_bit(rb)) {+ cm->log2_tile_columns++;
} else {break;
}
}
- pc->log2_tile_rows = vp9_read_bit(header_bc);
- if (pc->log2_tile_rows)
- pc->log2_tile_rows += vp9_read_bit(header_bc);
- pc->tile_columns = 1 << pc->log2_tile_columns;
- pc->tile_rows = 1 << pc->log2_tile_rows;
+ cm->log2_tile_rows = vp9_rb_read_bit(rb);
+ if (cm->log2_tile_rows)
+ cm->log2_tile_rows += vp9_rb_read_bit(rb);
+
+ cm->tile_columns = 1 << cm->log2_tile_columns;
+ cm->tile_rows = 1 << cm->log2_tile_rows;
+}
+
+static void decode_tiles(VP9D_COMP *pbi,
+ const uint8_t *data, size_t first_partition_size,
+ vp9_reader *residual_bc) {+ VP9_COMMON *const pc = &pbi->common;
+
+ const uint8_t *data_ptr = data + first_partition_size;
+ int tile_row, tile_col;
+
// Note: this memset assumes above_context[0], [1] and [2]
// are allocated as part of the same buffer.
vpx_memset(pc->above_context[0], 0, sizeof(ENTROPY_CONTEXT) * 2 *
@@ -955,7 +975,10 @@
setup_loopfilter(pbi, rb);
setup_quantization(pbi, rb);
+ setup_segmentation(pbi, rb);
+ setup_tile_info(cm, rb);
+
return vp9_rb_read_literal(rb, 16);
}
@@ -999,27 +1022,11 @@
mb_init_dequantizer(pc, &pbi->mb); // MB level dequantizer setup
- xd->lossless = pc->base_qindex == 0 &&
- pc->y_dc_delta_q == 0 &&
- pc->uv_dc_delta_q == 0 &&
- pc->uv_ac_delta_q == 0;
- if (xd->lossless) {- xd->itxm_add = vp9_idct_add_lossless_c;
- xd->itxm_add_y_block = vp9_idct_add_y_block_lossless_c;
- xd->itxm_add_uv_block = vp9_idct_add_uv_block_lossless_c;
- } else {- xd->itxm_add = vp9_idct_add;
- xd->itxm_add_y_block = vp9_idct_add_y_block;
- xd->itxm_add_uv_block = vp9_idct_add_uv_block;
- }
-
if (!keyframe)
vp9_setup_interp_filters(xd, pc->mcomp_filter_type, pc);
pc->fc = pc->frame_contexts[pc->frame_context_idx];
- setup_segmentation(pc, xd, &header_bc);
-
setup_txfm_mode(pc, xd->lossless, &header_bc);
update_frame_context(&pc->fc);
@@ -1046,7 +1053,7 @@
vp9_decode_mode_mvs_init(pbi, &header_bc);
- decode_tiles(pbi, data, first_partition_size, &header_bc, &residual_bc);
+ decode_tiles(pbi, data, first_partition_size, &residual_bc);
pc->last_width = pc->width;
pc->last_height = pc->height;
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -60,15 +60,8 @@
p[3] = value >> 24;
}
-void vp9_encode_unsigned_max(vp9_writer *br, int data, int max) {- assert(data <= max);
- while (max) {- vp9_write_bit(br, data & 1);
- data >>= 1;
- max >>= 1;
- }
-}
+
int recenter_nonneg(int v, int m) {if (v > (m << 1))
return v;
@@ -88,6 +81,11 @@
return cat;
}
+void vp9_encode_unsigned_max(struct vp9_write_bit_buffer *wb,
+ int data, int max) {+ vp9_wb_write_literal(wb, data, get_unsigned_bits(max));
+}
+
void encode_uniform(vp9_writer *w, int v, int n) {int l = get_unsigned_bits(n);
int m;
@@ -1259,17 +1257,18 @@
}
-static void encode_segmentation(VP9_COMP *cpi, vp9_writer *w) {+static void encode_segmentation(VP9_COMP *cpi,
+ struct vp9_write_bit_buffer *wb) {int i, j;
- VP9_COMMON *const pc = &cpi->common;
+ VP9_COMMON *const cm = &cpi->common;
MACROBLOCKD *const xd = &cpi->mb.e_mbd;
- vp9_write_bit(w, xd->segmentation_enabled);
+ vp9_wb_write_bit(wb, xd->segmentation_enabled);
if (!xd->segmentation_enabled)
return;
// Segmentation map
- vp9_write_bit(w, xd->update_mb_segmentation_map);
+ vp9_wb_write_bit(wb, xd->update_mb_segmentation_map);
if (xd->update_mb_segmentation_map) {// Select the coding strategy (temporal or spatial)
vp9_choose_segmap_coding_method(cpi);
@@ -1276,56 +1275,45 @@
// Write out probabilities used to decode unpredicted macro-block segments
for (i = 0; i < MB_SEG_TREE_PROBS; i++) {const int prob = xd->mb_segment_tree_probs[i];
- if (prob != MAX_PROB) {- vp9_write_bit(w, 1);
- vp9_write_prob(w, prob);
- } else {- vp9_write_bit(w, 0);
- }
+ const int update = prob != MAX_PROB;
+ vp9_wb_write_bit(wb, update);
+ if (update)
+ vp9_wb_write_literal(wb, prob, 8);
}
// Write out the chosen coding method.
- vp9_write_bit(w, pc->temporal_update);
- if (pc->temporal_update) {+ vp9_wb_write_bit(wb, cm->temporal_update);
+ if (cm->temporal_update) { for (i = 0; i < PREDICTION_PROBS; i++) {- const int prob = pc->segment_pred_probs[i];
- if (prob != MAX_PROB) {- vp9_write_bit(w, 1);
- vp9_write_prob(w, prob);
- } else {- vp9_write_bit(w, 0);
- }
+ const int prob = cm->segment_pred_probs[i];
+ const int update = prob != MAX_PROB;
+ vp9_wb_write_bit(wb, update);
+ if (update)
+ vp9_wb_write_literal(wb, prob, 8);
}
}
}
// Segmentation data
- vp9_write_bit(w, xd->update_mb_segmentation_data);
+ vp9_wb_write_bit(wb, xd->update_mb_segmentation_data);
// segment_reference_frames(cpi);
if (xd->update_mb_segmentation_data) {- vp9_write_bit(w, xd->mb_segment_abs_delta);
+ vp9_wb_write_bit(wb, xd->mb_segment_abs_delta);
for (i = 0; i < MAX_MB_SEGMENTS; i++) { for (j = 0; j < SEG_LVL_MAX; j++) {- const int data = vp9_get_segdata(xd, i, j);
- const int data_max = vp9_seg_feature_data_max(j);
+ const int active = vp9_segfeature_active(xd, i, j);
+ vp9_wb_write_bit(wb, active);
+ if (active) {+ const int data = vp9_get_segdata(xd, i, j);
+ const int data_max = vp9_seg_feature_data_max(j);
- if (vp9_segfeature_active(xd, i, j)) {- vp9_write_bit(w, 1);
-
if (vp9_is_segfeature_signed(j)) {- if (data < 0) {- vp9_encode_unsigned_max(w, -data, data_max);
- vp9_write_bit(w, 1);
- } else {- vp9_encode_unsigned_max(w, data, data_max);
- vp9_write_bit(w, 0);
- }
+ vp9_encode_unsigned_max(wb, abs(data), data_max);
+ vp9_wb_write_bit(wb, data < 0);
} else {- vp9_encode_unsigned_max(w, data, data_max);
+ vp9_encode_unsigned_max(wb, data, data_max);
}
- } else {- vp9_write_bit(w, 0);
}
}
}
@@ -1407,6 +1395,24 @@
}
}
+static void write_tile_info(VP9_COMMON *cm, struct vp9_write_bit_buffer *wb) {+ int min_log2_tiles, delta_log2_tiles, n_tile_bits, n;
+ vp9_get_tile_n_bits(cm, &min_log2_tiles, &delta_log2_tiles);
+ n_tile_bits = cm->log2_tile_columns - min_log2_tiles;
+ for (n = 0; n < delta_log2_tiles; n++) {+ if (n_tile_bits--) {+ vp9_wb_write_bit(wb, 1);
+ } else {+ vp9_wb_write_bit(wb, 0);
+ break;
+ }
+ }
+
+ vp9_wb_write_bit(wb, cm->log2_tile_rows != 0);
+ if (cm->log2_tile_rows != 0)
+ vp9_wb_write_bit(wb, cm->log2_tile_rows != 1);
+}
+
void write_uncompressed_header(VP9_COMP *cpi,
struct vp9_write_bit_buffer *wb) {VP9_COMMON *const cm = &cpi->common;
@@ -1515,6 +1521,9 @@
encode_loopfilter(cm, xd, wb);
encode_quantization(cm, wb);
+ encode_segmentation(cpi, wb);
+
+ write_tile_info(cm, wb);
}
void vp9_pack_bitstream(VP9_COMP *cpi, uint8_t *dest, unsigned long *size) {@@ -1545,8 +1554,6 @@
active_section = 7;
#endif
- encode_segmentation(cpi, &header_bc);
-
if (xd->lossless)
pc->txfm_mode = ONLY_4X4;
else
@@ -1621,24 +1628,6 @@
vp9_write_nmv_probs(cpi, xd->allow_high_precision_mv, &header_bc);
}
- /* tiling */
- {- int min_log2_tiles, delta_log2_tiles, n_tile_bits, n;
-
- vp9_get_tile_n_bits(pc, &min_log2_tiles, &delta_log2_tiles);
- n_tile_bits = pc->log2_tile_columns - min_log2_tiles;
- for (n = 0; n < delta_log2_tiles; n++) {- if (n_tile_bits--) {- vp9_write_bit(&header_bc, 1);
- } else {- vp9_write_bit(&header_bc, 0);
- break;
- }
- }
- vp9_write_bit(&header_bc, pc->log2_tile_rows != 0);
- if (pc->log2_tile_rows != 0)
- vp9_write_bit(&header_bc, pc->log2_tile_rows != 1);
- }
vp9_stop_encode(&header_bc);
--
⑨