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Add first_spatial_layer_to_encode to SVC.

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Use the existing VP9_SET_SVC control to set the
first spatial layer to encode.

Since we loop over all spatial layers inside the encoder, the
setting of spatial_layer_id via VP9_SET_SVC has no relevance.
Use it instead to set the first_spatial_layer_to_encode,
which allows an application to skip encoding lower layer(s).

Change only affects the 1 pass CBR SVC.

Change-Id: I5d63ab713c3e250fdf42c637f38d5ec8f60cd1fb
This commit is contained in:
Marco 2015-10-01 15:46:06 -07:00
parent b212094839
commit 7266bedc04
5 changed files with 11 additions and 5 deletions
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3
vp9/encoder/vp9_encoder.c
View File

@ -4279,7 +4279,8 @@ int vp9_get_compressed_data(VP9_COMP *cpi, unsigned int *frame_flags,
// non-zero spatial layer, it should not be an intra picture.
// TODO(Won Kap): this needs to change if per-layer intra frame is
// allowed.
if ((source->flags & VPX_EFLAG_FORCE_KF) && cpi->svc.spatial_layer_id) {
if ((source->flags & VPX_EFLAG_FORCE_KF) &&
cpi->svc.spatial_layer_id > cpi->svc.first_spatial_layer_to_encode) {
source->flags &= ~(unsigned int)(VPX_EFLAG_FORCE_KF);
}

2
vp9/encoder/vp9_ratectrl.c
View File

@ -1595,7 +1595,7 @@ void vp9_rc_get_svc_params(VP9_COMP *cpi) {
cpi->ref_frame_flags &= (~VP9_ALT_FLAG);
} else if (is_one_pass_cbr_svc(cpi)) {
LAYER_CONTEXT *lc = &cpi->svc.layer_context[layer];
if (cpi->svc.spatial_layer_id == 0) {
if (cpi->svc.spatial_layer_id == cpi->svc.first_spatial_layer_to_encode) {
lc->is_key_frame = 0;
} else {
lc->is_key_frame =

1
vp9/encoder/vp9_svc_layercontext.c
View File

@ -30,6 +30,7 @@ void vp9_init_layer_context(VP9_COMP *const cpi) {
svc->spatial_layer_id = 0;
svc->temporal_layer_id = 0;
svc->first_spatial_layer_to_encode = 0;
if (cpi->oxcf.error_resilient_mode == 0 && cpi->oxcf.pass == 2) {
if (vpx_realloc_frame_buffer(&cpi->svc.empty_frame.img,

1
vp9/encoder/vp9_svc_layercontext.h
View File

@ -55,6 +55,7 @@ typedef struct {
int number_temporal_layers;
int spatial_layer_to_encode;
int first_spatial_layer_to_encode;
// Workaround for multiple frame contexts
enum {

9
vp9/vp9_cx_iface.c
View File

@ -1372,17 +1372,20 @@ static vpx_codec_err_t ctrl_set_svc_layer_id(vpx_codec_alg_priv_t *ctx,
VP9_COMP *const cpi = (VP9_COMP *)ctx->cpi;
SVC *const svc = &cpi->svc;
svc->spatial_layer_id = data->spatial_layer_id;
svc->first_spatial_layer_to_encode = data->spatial_layer_id;
svc->temporal_layer_id = data->temporal_layer_id;
// Checks on valid layer_id input.
if (svc->temporal_layer_id < 0 ||
svc->temporal_layer_id >= (int)ctx->cfg.ts_number_layers) {
return VPX_CODEC_INVALID_PARAM;
}
if (svc->spatial_layer_id < 0 ||
svc->spatial_layer_id >= (int)ctx->cfg.ss_number_layers) {
if (svc->first_spatial_layer_to_encode < 0 ||
svc->first_spatial_layer_to_encode >= (int)ctx->cfg.ss_number_layers) {
return VPX_CODEC_INVALID_PARAM;
}
// First spatial layer to encode not implemented for two-pass.
if (is_two_pass_svc(cpi) && svc->first_spatial_layer_to_encode > 0)
return VPX_CODEC_INVALID_PARAM;
return VPX_CODEC_OK;
}