ref: eac344ef100e774fa14833df4dbce4700e110d8b
parent: eedd98ac0a7aded03218acbc2391b8bc6c3e2b67
author: Adrian Grange <[email protected]>
date: Sun Jun 9 06:10:33 EDT 2013
Implement intra-coded frames Implements ability to signal and decode frames that are encoded using only intra coding modes. Only the decode side has been implemented here. Change-Id: I53ac6a8d90422cd08ba389e5236e15b45f9e93de
--- a/vp9/common/vp9_entropy.c
+++ b/vp9/common/vp9_entropy.c
@@ -723,7 +723,7 @@
int count_sat;
int update_factor; /* denominator 256 */
- if (cm->frame_type == KEY_FRAME) {+ if ((cm->frame_type == KEY_FRAME) || cm->intra_only) {update_factor = COEF_MAX_UPDATE_FACTOR_KEY;
count_sat = COEF_COUNT_SAT_KEY;
} else if (cm->last_frame_type == KEY_FRAME) {--- a/vp9/common/vp9_entropymode.c
+++ b/vp9/common/vp9_entropymode.c
@@ -536,8 +536,16 @@
vp9_init_mode_contexts(cm);
- for (i = 0; i < NUM_FRAME_CONTEXTS; i++)
- vpx_memcpy(&cm->frame_contexts[i], &cm->fc, sizeof(cm->fc));
+ if ((cm->frame_type == KEY_FRAME) ||
+ cm->error_resilient_mode || (cm->reset_frame_context == 3)) {+ // Reset all frame contexts.
+ for (i = 0; i < NUM_FRAME_CONTEXTS; ++i)
+ vpx_memcpy(&cm->frame_contexts[i], &cm->fc, sizeof(cm->fc));
+ } else if (cm->reset_frame_context == 2) {+ // Reset only the frame context specified in the frame header.
+ vpx_memcpy(&cm->frame_contexts[cm->frame_context_idx], &cm->fc,
+ sizeof(cm->fc));
+ }
vpx_memset(cm->prev_mip, 0,
cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));
--- a/vp9/common/vp9_onyxc_int.h
+++ b/vp9/common/vp9_onyxc_int.h
@@ -364,6 +364,7 @@
const int use_prev_in_find_mv_refs = cm->width == cm->last_width &&
cm->height == cm->last_height &&
!cm->error_resilient_mode &&
+ !cm->intra_only &&
cm->last_show_frame;
// Special case: set prev_mi to NULL when the previous mode info
// context cannot be used.
--- a/vp9/decoder/vp9_decodemv.c
+++ b/vp9/decoder/vp9_decodemv.c
@@ -337,7 +337,7 @@
static void mb_mode_mv_init(VP9D_COMP *pbi, vp9_reader *r) {VP9_COMMON *const cm = &pbi->common;
- if (cm->frame_type != KEY_FRAME) {+ if ((cm->frame_type != KEY_FRAME) && (!cm->intra_only)) {nmv_context *const nmvc = &pbi->common.fc.nmvc;
MACROBLOCKD *const xd = &pbi->mb;
int i, j;
@@ -816,7 +816,7 @@
MODE_INFO *mi = xd->mode_info_context;
MB_MODE_INFO *const mbmi = &mi->mbmi;
- if (cm->frame_type == KEY_FRAME) {+ if ((cm->frame_type == KEY_FRAME) || cm->intra_only) {kfread_modes(pbi, mi, mi_row, mi_col, r);
} else {read_mb_modes_mv(pbi, mi, &mi->mbmi, mi_row, mi_col, r);
--- a/vp9/decoder/vp9_decodframe.c
+++ b/vp9/decoder/vp9_decodframe.c
@@ -308,7 +308,7 @@
assert(mbmi->ref_frame[0] != INTRA_FRAME);
- if (pbi->common.frame_type != KEY_FRAME)
+ if ((pbi->common.frame_type != KEY_FRAME) && (!pbi->common.intra_only))
vp9_setup_interp_filters(xd, mbmi->interp_filter, &pbi->common);
// prediction
@@ -1062,8 +1062,6 @@
}
}
- vp9_setup_past_independence(cm, xd);
-
pbi->refresh_frame_flags = (1 << NUM_REF_FRAMES) - 1;
for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)
@@ -1073,11 +1071,12 @@
} else {cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb);
- if (cm->error_resilient_mode)
- vp9_setup_past_independence(cm, xd);
+ cm->reset_frame_context = cm->error_resilient_mode ?
+ 0 : vp9_rb_read_literal(rb, 2);
if (cm->intra_only) {check_sync_code(cm, rb);
+
pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);
setup_frame_size(pbi, rb);
} else {@@ -1102,11 +1101,9 @@
}
if (!cm->error_resilient_mode) {- cm->reset_frame_context = vp9_rb_read_literal(rb, 2);
cm->refresh_frame_context = vp9_rb_read_bit(rb);
cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);
} else {- cm->reset_frame_context = 0;
cm->refresh_frame_context = 0;
cm->frame_parallel_decoding_mode = 1;
}
@@ -1113,6 +1110,10 @@
cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LG2);
+ if ((cm->frame_type == KEY_FRAME) ||
+ cm->error_resilient_mode || cm->intra_only)
+ vp9_setup_past_independence(cm, xd);
+
setup_loopfilter(pbi, rb);
setup_quantization(pbi, rb);
setup_segmentation(pbi, rb);
@@ -1215,7 +1216,7 @@
if (!pc->error_resilient_mode && !pc->frame_parallel_decoding_mode) {vp9_adapt_coef_probs(pc);
- if (!keyframe) {+ if ((!keyframe) && (!pc->intra_only)) {vp9_adapt_mode_probs(pc);
vp9_adapt_mode_context(pc);
vp9_adapt_nmv_probs(pc, xd->allow_high_precision_mv);
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -821,7 +821,7 @@
set_mi_row_col(&cpi->common, xd, mi_row,
1 << mi_height_log2(m->mbmi.sb_type),
mi_col, 1 << mi_width_log2(m->mbmi.sb_type));
- if (cm->frame_type == KEY_FRAME) {+ if ((cm->frame_type == KEY_FRAME) || cm->intra_only) {write_mb_modes_kf(cpi, m, bc, mi_row, mi_col);
#ifdef ENTROPY_STATS
active_section = 8;
@@ -1527,8 +1527,12 @@
if (!cm->show_frame)
vp9_wb_write_bit(wb, cm->intra_only);
+ if (!cm->error_resilient_mode)
+ vp9_wb_write_literal(wb, cm->reset_frame_context, 2);
+
if (cm->intra_only) {write_sync_code(wb);
+
vp9_wb_write_literal(wb, get_refresh_mask(cpi), NUM_REF_FRAMES);
write_frame_size(cpi, wb);
} else {@@ -1549,7 +1553,6 @@
}
if (!cm->error_resilient_mode) {- vp9_wb_write_literal(wb, cm->reset_frame_context, 2);
vp9_wb_write_bit(wb, cm->refresh_frame_context);
vp9_wb_write_bit(wb, cm->frame_parallel_decoding_mode);
}
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -206,7 +206,7 @@
void vp9_setup_inter_frame(VP9_COMP *cpi) {VP9_COMMON *cm = &cpi->common;
MACROBLOCKD *xd = &cpi->mb.e_mbd;
- if (cm->error_resilient_mode)
+ if (cm->error_resilient_mode || cm->intra_only)
vp9_setup_past_independence(cm, xd);
assert(cm->frame_context_idx < NUM_FRAME_CONTEXTS);