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vp9: SVC: Redefine the source downsample filter choice.

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Rename the source downsampling filter, and define it
per spatial layers. Used 1 pass CBR SVC.

Change-Id: I8135f2ab89c535c53429b9c58b586f746bb668c7
This commit is contained in:
Marco 2017-04-20 09:50:16 -07:00
parent 8975436466
commit 3134a52d26
4 changed files with 26 additions and 20 deletions
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27
vp9/encoder/vp9_encoder.c
View File

@ -3124,7 +3124,11 @@ static void encode_without_recode_loop(VP9_COMP *cpi, size_t *size,
uint8_t *dest) {
VP9_COMMON *const cm = &cpi->common;
int q = 0, bottom_index = 0, top_index = 0; // Dummy variables.
const int phase_scaler = is_one_pass_cbr_svc(cpi) ? cpi->svc.phase_scaler : 0;
const int phase_scaler =
(is_one_pass_cbr_svc(cpi) &&
cpi->svc.filtertype_downsample_source[cpi->svc.spatial_layer_id])
? 8
: 0;
// Flag to check if its valid to compute the source sad (used for
// scene detection and for superblock content state in CBR mode).
@ -3144,9 +3148,10 @@ static void encode_without_recode_loop(VP9_COMP *cpi, size_t *size,
// For svc, if it is a 1/4x1/4 downscaling, do a two-stage scaling to take
// advantage of the 1:2 optimized scaler. In the process, the 1/2x1/2
// result will be saved in scaled_temp and might be used later.
cpi->Source =
vp9_svc_twostage_scale(cm, cpi->un_scaled_source, &cpi->scaled_source,
&cpi->svc.scaled_temp, phase_scaler);
int phase_scaler2 = (cpi->svc.filtertype_downsample_source[1]) ? 8 : 0;
cpi->Source = vp9_svc_twostage_scale(
cm, cpi->un_scaled_source, &cpi->scaled_source, &cpi->svc.scaled_temp,
phase_scaler, phase_scaler2);
cpi->svc.scaled_one_half = 1;
} else if (is_one_pass_cbr_svc(cpi) &&
cpi->un_scaled_source->y_width == cm->width << 1 &&
@ -3685,25 +3690,23 @@ static void set_ext_overrides(VP9_COMP *cpi) {
}
}
YV12_BUFFER_CONFIG *vp9_svc_twostage_scale(VP9_COMMON *cm,
YV12_BUFFER_CONFIG *unscaled,
YV12_BUFFER_CONFIG *scaled,
YV12_BUFFER_CONFIG *scaled_temp,
int phase_scaler) {
YV12_BUFFER_CONFIG *vp9_svc_twostage_scale(
VP9_COMMON *cm, YV12_BUFFER_CONFIG *unscaled, YV12_BUFFER_CONFIG *scaled,
YV12_BUFFER_CONFIG *scaled_temp, int phase_scaler, int phase_scaler2) {
if (cm->mi_cols * MI_SIZE != unscaled->y_width ||
cm->mi_rows * MI_SIZE != unscaled->y_height) {
#if CONFIG_VP9_HIGHBITDEPTH
if (cm->bit_depth == VPX_BITS_8) {
vp9_scale_and_extend_frame(unscaled, scaled_temp, phase_scaler);
vp9_scale_and_extend_frame(unscaled, scaled_temp, phase_scaler2);
vp9_scale_and_extend_frame(scaled_temp, scaled, phase_scaler);
} else {
scale_and_extend_frame(unscaled, scaled_temp, (int)cm->bit_depth,
phase_scaler);
phase_scaler2);
scale_and_extend_frame(scaled_temp, scaled, (int)cm->bit_depth,
phase_scaler);
}
#else
vp9_scale_and_extend_frame(unscaled, scaled_temp, phase_scaler);
vp9_scale_and_extend_frame(unscaled, scaled_temp, phase_scaler2);
vp9_scale_and_extend_frame(scaled_temp, scaled, phase_scaler);
#endif // CONFIG_VP9_HIGHBITDEPTH
return scaled;

2
vp9/encoder/vp9_encoder.h
View File

@ -844,7 +844,7 @@ YV12_BUFFER_CONFIG *vp9_svc_twostage_scale(VP9_COMMON *cm,
YV12_BUFFER_CONFIG *unscaled,
YV12_BUFFER_CONFIG *scaled,
YV12_BUFFER_CONFIG *scaled_temp,
int phase_scaler);
int phase_scaler, int phase_scaler2);
YV12_BUFFER_CONFIG *vp9_scale_if_required(VP9_COMMON *cm,
YV12_BUFFER_CONFIG *unscaled,

6
vp9/encoder/vp9_svc_layercontext.c
View File

@ -36,13 +36,13 @@ void vp9_init_layer_context(VP9_COMP *const cpi) {
svc->scaled_temp_is_alloc = 0;
svc->scaled_one_half = 0;
svc->current_superframe = 0;
svc->phase_scaler = 0;
for (i = 0; i < REF_FRAMES; ++i) svc->ref_frame_index[i] = -1;
for (sl = 0; sl < oxcf->ss_number_layers; ++sl) {
cpi->svc.ext_frame_flags[sl] = 0;
cpi->svc.ext_lst_fb_idx[sl] = 0;
cpi->svc.ext_gld_fb_idx[sl] = 1;
cpi->svc.ext_alt_fb_idx[sl] = 2;
cpi->svc.filtertype_downsample_source[sl] = 0;
}
if (cpi->oxcf.error_resilient_mode == 0 && cpi->oxcf.pass == 2) {
@ -664,8 +664,10 @@ int vp9_one_pass_cbr_svc_start_layer(VP9_COMP *const cpi) {
if ((lc->scaling_factor_num != lc->scaling_factor_den >> 1) &&
!(lc->scaling_factor_num == lc->scaling_factor_den >> 2 && sl == 0 &&
cpi->svc.number_spatial_layers == 3)) {
int sl2;
cpi->svc.use_base_mv = 0;
cpi->svc.phase_scaler = 0;
for (sl2 = 0; sl2 < cpi->svc.number_spatial_layers - 1; ++sl2)
cpi->svc.filtertype_downsample_source[sl2] = 0;
break;
}
}

11
vp9/encoder/vp9_svc_layercontext.h
View File

@ -88,11 +88,12 @@ typedef struct {
int force_zero_mode_spatial_ref;
int current_superframe;
int use_base_mv;
// phase_scaler used to control the downscaling filter for source scaling.
// phase_scaler = 0 will do sub-sampling (no weighted average),
// phase_scaler = 8 will center the target pixel and use the averaging filter,
// for eightap regular: {-1, 6, -19, 78, 78, -19, 6, -1 }.
int phase_scaler;
// Used to control the downscaling filter for source scaling, for 1 pass CBR.
// 0 will do sub-sampling (no weighted average), 1 will center the target
// pixel and use the averaging filter, for the default eightap_regular:
// {-1, 6, -19, 78, 78, -19, 6, -1 }.
// TODO(marpan): Add option for bilinear.
int filtertype_downsample_source[VPX_SS_MAX_LAYERS];
} SVC;
struct VP9_COMP;