Commit eac344ef authored by Adrian Grange's avatar Adrian Grange
Browse files

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
parent eedd98ac
......@@ -723,7 +723,7 @@ void vp9_adapt_coef_probs(VP9_COMMON *cm) {
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) {
......
......@@ -536,8 +536,16 @@ void vp9_setup_past_independence(VP9_COMMON *cm, MACROBLOCKD *xd) {
vp9_init_mode_contexts(cm);
for (i = 0; i < NUM_FRAME_CONTEXTS; i++)
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));
......
......@@ -364,6 +364,7 @@ static void set_prev_mi(VP9_COMMON *cm) {
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.
......
......@@ -337,7 +337,7 @@ static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {
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 @@ void vp9_decode_mb_mode_mv(VP9D_COMP* const pbi,
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);
......
......@@ -308,7 +308,7 @@ static void decode_atom(VP9D_COMP *pbi, MACROBLOCKD *xd,
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 @@ static size_t read_uncompressed_header(VP9D_COMP *pbi,
}
}
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 @@ static size_t read_uncompressed_header(VP9D_COMP *pbi,
} 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 {
......@@ -1102,17 +1101,19 @@ static size_t read_uncompressed_header(VP9D_COMP *pbi,
}
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;
}
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 @@ int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {
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);
......
......@@ -821,7 +821,7 @@ static void write_modes_b(VP9_COMP *cpi, MODE_INFO *m, vp9_writer *bc,
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 @@ static void write_uncompressed_header(VP9_COMP *cpi,
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 @@ static void write_uncompressed_header(VP9_COMP *cpi,
}
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);
}
......
......@@ -206,7 +206,7 @@ void vp9_setup_key_frame(VP9_COMP *cpi) {
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);
......
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