generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Remove reference frame buffer update for show_exsiting_frame

Browse Source 
Originally we need to send the refresh flag and the virtual indices
mapping for the reference frame buffer update for show_existing_frame to
have the BWDREF_FRAME replace the LAST_FRAME.

To remove sending this information, we update the the virtual indices
of the reference frame buffer after the last_bipred_frame is encoded,
and therefore the decoder will receive the updated reference mapping
at the next non-show-existing frame.

As a result, we can save 4 bytes per show-existing frame, and get 0.12,
0.2, and 0.07 BDRATE improvement in lowres, derf, and midref test set
respectively.

Change-Id: I63d41ee6ea99884798f0778b789d2701e2f2d3e0
This commit is contained in:
Wei-ting Lin
2016-06-30 13:33:55 -07:00
parent b04ea832a4
commit f9e38a7bb9
4 changed files with 26 additions and 99 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
vp10/decoder/decodeframe.c
View File

@@ -3159,66 +3159,12 @@ static size_t read_uncompressed_header(VP10Decoder *pbi,
cm->lf.filter_level = 0;
cm->show_frame = 1;
#if CONFIG_EXT_REFS
// NOTE(zoeliu): The existing frame to show is adopted as a reference frame.
pbi->refresh_frame_flags = vpx_rb_read_literal(rb, REF_FRAMES);
for (i = 0; i < REFS_PER_FRAME; ++i) {
const int ref = vpx_rb_read_literal(rb, REF_FRAMES_LOG2);
const int idx = cm->ref_frame_map[ref];
RefBuffer *const ref_frame = &cm->frame_refs[i];
ref_frame->idx = idx;
ref_frame->buf = &frame_bufs[idx].buf;
cm->ref_frame_sign_bias[LAST_FRAME + i] = vpx_rb_read_bit(rb);
}
for (i = 0; i < REFS_PER_FRAME; ++i) {
RefBuffer *const ref_buf = &cm->frame_refs[i];
#if CONFIG_VP9_HIGHBITDEPTH
vp10_setup_scale_factors_for_frame(&ref_buf->sf,
ref_buf->buf->y_crop_width,
ref_buf->buf->y_crop_height,
cm->width, cm->height,
cm->use_highbitdepth);
#else // CONFIG_VP9_HIGHBITDEPTH
vp10_setup_scale_factors_for_frame(&ref_buf->sf,
ref_buf->buf->y_crop_width,
ref_buf->buf->y_crop_height,
cm->width, cm->height);
#endif // CONFIG_VP9_HIGHBITDEPTH
}
// Generate next_ref_frame_map.
lock_buffer_pool(pool);
for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) {
if (mask & 1) {
cm->next_ref_frame_map[ref_index] = cm->new_fb_idx;
++frame_bufs[cm->new_fb_idx].ref_count;
} else {
cm->next_ref_frame_map[ref_index] = cm->ref_frame_map[ref_index];
}
// Current thread holds the reference frame.
if (cm->ref_frame_map[ref_index] >= 0)
++frame_bufs[cm->ref_frame_map[ref_index]].ref_count;
++ref_index;
}
for (; ref_index < REF_FRAMES; ++ref_index) {
cm->next_ref_frame_map[ref_index] = cm->ref_frame_map[ref_index];
// Current thread holds the reference frame.
if (cm->ref_frame_map[ref_index] >= 0)
++frame_bufs[cm->ref_frame_map[ref_index]].ref_count;
}
unlock_buffer_pool(pool);
pbi->hold_ref_buf = 1;
#else
pbi->refresh_frame_flags = 0;
if (cm->frame_parallel_decode) {
for (i = 0; i < REF_FRAMES; ++i)
cm->next_ref_frame_map[i] = cm->ref_frame_map[i];
}
#endif // CONFIG_EXT_REFS
return 0;
}

16
vp10/decoder/decoder.c
View File

@@ -285,19 +285,12 @@ static void swap_frame_buffers(VP10Decoder *pbi) {
}
// Current thread releases the holding of reference frame.
#if CONFIG_EXT_REFS
for (; ref_index < REF_FRAMES; ++ref_index) {
const int old_idx = cm->ref_frame_map[ref_index];
decrease_ref_count(old_idx, frame_bufs, pool);
cm->ref_frame_map[ref_index] = cm->next_ref_frame_map[ref_index];
}
#else
for (; ref_index < REF_FRAMES && !cm->show_existing_frame; ++ref_index) {
const int old_idx = cm->ref_frame_map[ref_index];
decrease_ref_count(old_idx, frame_bufs, pool);
cm->ref_frame_map[ref_index] = cm->next_ref_frame_map[ref_index];
}
#endif // CONFIG_EXT_REFS
unlock_buffer_pool(pool);
pbi->hold_ref_buf = 0;
cm->frame_to_show = get_frame_new_buffer(cm);
@@ -406,17 +399,10 @@ int vp10_receive_compressed_data(VP10Decoder *pbi,
}
// Current thread releases the holding of reference frame.
#if CONFIG_EXT_REFS
for (; ref_index < REF_FRAMES; ++ref_index) {
const int old_idx = cm->ref_frame_map[ref_index];
decrease_ref_count(old_idx, frame_bufs, pool);
}
#else
for (; ref_index < REF_FRAMES && !cm->show_existing_frame; ++ref_index) {
const int old_idx = cm->ref_frame_map[ref_index];
decrease_ref_count(old_idx, frame_bufs, pool);
}
#endif // CONFIG_EXT_REFS
pbi->hold_ref_buf = 0;
}
// Release current frame.

11
vp10/encoder/bitstream.c
View File

@@ -3042,7 +3042,6 @@ static void write_uncompressed_header(VP10_COMP *cpi,
cm->is_reference_frame = 1;
if (cm->show_existing_frame) {
MV_REFERENCE_FRAME ref_frame;
RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs;
const int frame_to_show =
cm->ref_frame_map[cpi->existing_fb_idx_to_show];
@@ -3057,16 +3056,6 @@ static void write_uncompressed_header(VP10_COMP *cpi,
vpx_wb_write_bit(wb, 1); // show_existing_frame
vpx_wb_write_literal(wb, cpi->existing_fb_idx_to_show, 3);
cpi->refresh_frame_mask = get_refresh_mask(cpi);
vpx_wb_write_literal(wb, cpi->refresh_frame_mask, REF_FRAMES);
for (ref_frame = LAST_FRAME; ref_frame <= ALTREF_FRAME; ++ref_frame) {
assert(get_ref_frame_map_idx(cpi, ref_frame) != INVALID_IDX);
vpx_wb_write_literal(wb, get_ref_frame_map_idx(cpi, ref_frame),
REF_FRAMES_LOG2);
vpx_wb_write_bit(wb, cm->ref_frame_sign_bias[ref_frame]);
}
return;
} else {
#endif // CONFIG_EXT_REFS

42
vp10/encoder/encoder.c
View File

@@ -3390,23 +3390,6 @@ void vp10_update_reference_frames(VP10_COMP *cpi) {
if (cm->show_frame)
cpi->last_show_frame_buf_idx = cm->new_fb_idx;
#if CONFIG_EXT_REFS
// TODO(zoeliu): To remove the reference buffer update for the
// show_existing_frame==1 case.
#if 0
if (cpi->rc.is_last_bipred_frame) {
// NOTE: After the encoding of the LAST_BIPRED_FRAME, the flag of
// show_existing_frame will be set, to notify the decoder to show the
// coded BWDREF_FRAME. During the handling of the show_existing_frame,
// no update will be conducted on the reference frame buffer.
// Following is to get the BWDREF_FRAME to show to be regarded as the
// LAST_FRAME, preparing for the encoding of the next BWDREF_FRAME.
cpi->lst_fb_idx = cpi->bwd_fb_idx;
return;
}
#endif // 0
#endif // CONFIG_EXT_REFS
if (use_upsampled_ref) {
#if CONFIG_EXT_REFS
if (cm->show_existing_frame) {
@@ -3470,6 +3453,29 @@ void vp10_update_reference_frames(VP10_COMP *cpi) {
// TODO(zoeliu): Do we need to copy cpi->interp_filter_selected[0] over to
// cpi->interp_filter_selected[GOLDEN_FRAME]?
#if CONFIG_EXT_REFS
} else if (cpi->rc.is_last_bipred_frame) {
// Refresh the LAST_FRAME with the BWDREF_FRAME and retire the LAST3_FRAME
// by updating the virtual indices. Note that the frame BWDREF_FRAME points
// to now should be retired, and it should not be used before refreshed.
int ref_frame, tmp = cpi->lst_fb_idxes[LAST_REF_FRAMES-1];
for (ref_frame = LAST_REF_FRAMES - 1; ref_frame > 0; --ref_frame) {
cpi->lst_fb_idxes[ref_frame] = cpi->lst_fb_idxes[ref_frame - 1];
if (!cpi->rc.is_src_frame_alt_ref) {
memcpy(cpi->interp_filter_selected[ref_frame],
cpi->interp_filter_selected[ref_frame - 1],
sizeof(cpi->interp_filter_selected[ref_frame - 1]));
}
}
cpi->lst_fb_idxes[0] = cpi->bwd_fb_idx;
if (!cpi->rc.is_src_frame_alt_ref) {
memcpy(cpi->interp_filter_selected[0],
cpi->interp_filter_selected[BWDREF_FRAME],
sizeof(cpi->interp_filter_selected[BWDREF_FRAME]));
}
cpi->bwd_fb_idx = tmp;
#endif // CONFIG_EXT_REFS
} else { /* For non key/golden frames */
if (cpi->refresh_alt_ref_frame) {
int arf_idx = cpi->alt_fb_idx;
@@ -4810,7 +4816,7 @@ static void encode_frame_to_data_rate(VP10_COMP *cpi,
cm->show_frame = 1;
cpi->frame_flags = *frame_flags;
cpi->refresh_last_frame = 1;
cpi->refresh_last_frame = 0;
cpi->refresh_golden_frame = 0;
cpi->refresh_bwd_ref_frame = 0;
cpi->refresh_alt_ref_frame = 0;