void vp9_update_spatial_layer_framerate(VP9_COMP *const cpi, double framerate) {
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(&cpi->svc);
RATE_CONTROL *const lrc = &lc->rc;
lc->framerate = framerate;
lrc->avg_frame_bandwidth = (int)(lc->target_bandwidth / lc->framerate);
lrc->min_frame_bandwidth = (int)(lrc->avg_frame_bandwidth *
oxcf->two_pass_vbrmin_section / 100);
lrc->max_frame_bandwidth = (int)(((int64_t)lrc->avg_frame_bandwidth *
oxcf->two_pass_vbrmax_section) / 100);
lrc->max_gf_interval = 16;
lrc->static_scene_max_gf_interval = cpi->oxcf.key_freq >> 1;
if (oxcf->play_alternate && oxcf->lag_in_frames) {
if (lrc->max_gf_interval > oxcf->lag_in_frames - 1)
lrc->max_gf_interval = oxcf->lag_in_frames - 1;
if (lrc->static_scene_max_gf_interval > oxcf->lag_in_frames - 1)
lrc->static_scene_max_gf_interval = oxcf->lag_in_frames - 1;
}
if (lrc->max_gf_interval > lrc->static_scene_max_gf_interval)
lrc->max_gf_interval = lrc->static_scene_max_gf_interval;
}
void vp9_restore_layer_context(VP9_COMP *const cpi) {
LAYER_CONTEXT *const lc = get_layer_context(cpi);
const int old_frame_since_key = cpi->rc.frames_since_key;
const int old_frame_to_key = cpi->rc.frames_to_key;
cpi->rc = lc->rc;
cpi->twopass = lc->twopass;
cpi->oxcf.target_bandwidth = lc->target_bandwidth;
cpi->alt_ref_source = lc->alt_ref_source;
// Reset the frames_since_key and frames_to_key counters to their values
// before the layer restore. Keep these defined for the stream (not layer).
if (cpi->svc.number_temporal_layers > 1 ||
(cpi->svc.number_spatial_layers > 1 && !is_two_pass_svc(cpi))) {
cpi->rc.frames_since_key = old_frame_since_key;
cpi->rc.frames_to_key = old_frame_to_key;
}
// For spatial-svc, allow cyclic-refresh to be applied on the spatial layers,
// for the base temporal layer.
if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ &&
cpi->svc.number_spatial_layers > 1 &&
cpi->svc.temporal_layer_id == 0) {
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
signed char *temp = cr->map;
uint8_t *temp2 = cr->last_coded_q_map;
uint8_t *temp3 = cpi->consec_zero_mv;
cr->map = lc->map;
lc->map = temp;
cr->last_coded_q_map = lc->last_coded_q_map;
lc->last_coded_q_map = temp2;
cpi->consec_zero_mv = lc->consec_zero_mv;
lc->consec_zero_mv = temp3;
cr->sb_index = lc->sb_index;
}
}
void vp9_save_layer_context(VP9_COMP *const cpi) {
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(cpi);
lc->rc = cpi->rc;
lc->twopass = cpi->twopass;
lc->target_bandwidth = (int)oxcf->target_bandwidth;
lc->alt_ref_source = cpi->alt_ref_source;
// For spatial-svc, allow cyclic-refresh to be applied on the spatial layers,
// for the base temporal layer.
if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ &&
cpi->svc.number_spatial_layers > 1 &&
cpi->svc.temporal_layer_id == 0) {
CYCLIC_REFRESH *const cr = cpi->cyclic_refresh;
signed char *temp = lc->map;
uint8_t *temp2 = lc->last_coded_q_map;
uint8_t *temp3 = lc->consec_zero_mv;
lc->map = cr->map;
cr->map = temp;
lc->last_coded_q_map = cr->last_coded_q_map;
cr->last_coded_q_map = temp2;
lc->consec_zero_mv = cpi->consec_zero_mv;
cpi->consec_zero_mv = temp3;
lc->sb_index = cr->sb_index;
}
}
void vp9_update_temporal_layer_framerate(VP9_COMP *const cpi) {
SVC *const svc = &cpi->svc;
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(cpi);
RATE_CONTROL *const lrc = &lc->rc;
// Index into spatial+temporal arrays.
const int st_idx = svc->spatial_layer_id * svc->number_temporal_layers +
svc->temporal_layer_id;
const int tl = svc->temporal_layer_id;
lc->framerate = cpi->framerate / oxcf->ts_rate_decimator[tl];
lrc->avg_frame_bandwidth = (int)(lc->target_bandwidth / lc->framerate);
lrc->max_frame_bandwidth = cpi->rc.max_frame_bandwidth;
// Update the average layer frame size (non-cumulative per-frame-bw).
if (tl == 0) {
lc->avg_frame_size = lrc->avg_frame_bandwidth;
} else {
const double prev_layer_framerate =
cpi->framerate / oxcf->ts_rate_decimator[tl - 1];
const int prev_layer_target_bandwidth =
oxcf->layer_target_bitrate[st_idx - 1];
lc->avg_frame_size =
(int)((lc->target_bandwidth - prev_layer_target_bandwidth) /
(lc->framerate - prev_layer_framerate));
}
}
void vp9_save_layer_context(VP9_COMP *const cpi) {
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(cpi);
lc->rc = cpi->rc;
lc->twopass = cpi->twopass;
lc->target_bandwidth = (int)oxcf->target_bandwidth;
lc->alt_ref_source = cpi->alt_ref_source;
}
void vp9_save_layer_context(VP9_COMP *const cpi) {
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(&cpi->svc);
lc->rc = cpi->rc;
lc->twopass = cpi->twopass;
lc->target_bandwidth = (int)oxcf->target_bandwidth;
lc->starting_buffer_level = oxcf->starting_buffer_level;
lc->optimal_buffer_level = oxcf->optimal_buffer_level;
lc->maximum_buffer_size = oxcf->maximum_buffer_size;
}
void vp9_update_spatial_layer_framerate(VP9_COMP *const cpi, double framerate) {
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(cpi);
RATE_CONTROL *const lrc = &lc->rc;
lc->framerate = framerate;
lrc->avg_frame_bandwidth = (int)(lc->target_bandwidth / lc->framerate);
lrc->min_frame_bandwidth = (int)(lrc->avg_frame_bandwidth *
oxcf->two_pass_vbrmin_section / 100);
lrc->max_frame_bandwidth = (int)(((int64_t)lrc->avg_frame_bandwidth *
oxcf->two_pass_vbrmax_section) / 100);
vp9_rc_set_gf_interval_range(cpi, lrc);
}
void vp9_restore_layer_context(VP9_COMP *const cpi) {
LAYER_CONTEXT *const lc = get_layer_context(cpi);
const int old_frame_since_key = cpi->rc.frames_since_key;
const int old_frame_to_key = cpi->rc.frames_to_key;
cpi->rc = lc->rc;
cpi->twopass = lc->twopass;
cpi->oxcf.target_bandwidth = lc->target_bandwidth;
cpi->alt_ref_source = lc->alt_ref_source;
// Reset the frames_since_key and frames_to_key counters to their values
// before the layer restore. Keep these defined for the stream (not layer).
if (cpi->svc.number_temporal_layers > 1) {
cpi->rc.frames_since_key = old_frame_since_key;
cpi->rc.frames_to_key = old_frame_to_key;
}
}
void vp9_restore_layer_context(VP9_COMP *const cpi) {
LAYER_CONTEXT *const lc = get_layer_context(&cpi->svc);
const int old_frame_since_key = cpi->rc.frames_since_key;
const int old_frame_to_key = cpi->rc.frames_to_key;
cpi->rc = lc->rc;
cpi->twopass = lc->twopass;
cpi->oxcf.target_bandwidth = lc->target_bandwidth;
cpi->oxcf.starting_buffer_level = lc->starting_buffer_level;
cpi->oxcf.optimal_buffer_level = lc->optimal_buffer_level;
cpi->oxcf.maximum_buffer_size = lc->maximum_buffer_size;
// Reset the frames_since_key and frames_to_key counters to their values
// before the layer restore. Keep these defined for the stream (not layer).
if (cpi->svc.number_temporal_layers > 1) {
cpi->rc.frames_since_key = old_frame_since_key;
cpi->rc.frames_to_key = old_frame_to_key;
}
}
void vp9_update_temporal_layer_framerate(VP9_COMP *const cpi) {
SVC *const svc = &cpi->svc;
const VP9EncoderConfig *const oxcf = &cpi->oxcf;
LAYER_CONTEXT *const lc = get_layer_context(svc);
RATE_CONTROL *const lrc = &lc->rc;
const int layer = svc->temporal_layer_id;
lc->framerate = oxcf->framerate / oxcf->ts_rate_decimator[layer];
lrc->avg_frame_bandwidth = (int)(lc->target_bandwidth / lc->framerate);
lrc->max_frame_bandwidth = cpi->rc.max_frame_bandwidth;
// Update the average layer frame size (non-cumulative per-frame-bw).
if (layer == 0) {
lc->avg_frame_size = lrc->avg_frame_bandwidth;
} else {
const double prev_layer_framerate =
oxcf->framerate / oxcf->ts_rate_decimator[layer - 1];
const int prev_layer_target_bandwidth =
oxcf->ts_target_bitrate[layer - 1] * 1000;
lc->avg_frame_size =
(int)((lc->target_bandwidth - prev_layer_target_bandwidth) /
(lc->framerate - prev_layer_framerate));
}
}
int vp9_svc_start_frame(VP9_COMP *const cpi) {
int width = 0, height = 0;
LAYER_CONTEXT *lc;
struct lookahead_entry *buf;
int count = 1 << (cpi->svc.number_temporal_layers - 1);
cpi->svc.spatial_layer_id = cpi->svc.spatial_layer_to_encode;
lc = &cpi->svc.layer_context[cpi->svc.spatial_layer_id];
cpi->svc.temporal_layer_id = 0;
while ((lc->current_video_frame_in_layer % count) != 0) {
++cpi->svc.temporal_layer_id;
count >>= 1;
}
cpi->ref_frame_flags = VP9_ALT_FLAG | VP9_GOLD_FLAG | VP9_LAST_FLAG;
cpi->lst_fb_idx = cpi->svc.spatial_layer_id;
if (cpi->svc.spatial_layer_id == 0)
cpi->gld_fb_idx = (lc->gold_ref_idx >= 0) ?
lc->gold_ref_idx : cpi->lst_fb_idx;
else
cpi->gld_fb_idx = cpi->svc.spatial_layer_id - 1;
if (lc->current_video_frame_in_layer == 0) {
if (cpi->svc.spatial_layer_id >= 2) {
cpi->alt_fb_idx = cpi->svc.spatial_layer_id - 2;
} else {
cpi->alt_fb_idx = cpi->lst_fb_idx;
cpi->ref_frame_flags &= (~VP9_LAST_FLAG & ~VP9_ALT_FLAG);
}
} else {
if (cpi->oxcf.ss_enable_auto_arf[cpi->svc.spatial_layer_id]) {
cpi->alt_fb_idx = lc->alt_ref_idx;
if (!lc->has_alt_frame)
cpi->ref_frame_flags &= (~VP9_ALT_FLAG);
} else {
// Find a proper alt_fb_idx for layers that don't have alt ref frame
if (cpi->svc.spatial_layer_id == 0) {
cpi->alt_fb_idx = cpi->lst_fb_idx;
} else {
LAYER_CONTEXT *lc_lower =
&cpi->svc.layer_context[cpi->svc.spatial_layer_id - 1];
if (cpi->oxcf.ss_enable_auto_arf[cpi->svc.spatial_layer_id - 1] &&
lc_lower->alt_ref_source != NULL)
cpi->alt_fb_idx = lc_lower->alt_ref_idx;
else if (cpi->svc.spatial_layer_id >= 2)
cpi->alt_fb_idx = cpi->svc.spatial_layer_id - 2;
else
cpi->alt_fb_idx = cpi->lst_fb_idx;
}
}
}
get_layer_resolution(cpi->oxcf.width, cpi->oxcf.height,
lc->scaling_factor_num, lc->scaling_factor_den,
&width, &height);
// Workaround for multiple frame contexts. In some frames we can't use prev_mi
// since its previous frame could be changed during decoding time. The idea is
// we put a empty invisible frame in front of them, then we will not use
// prev_mi when encoding these frames.
buf = vp9_lookahead_peek(cpi->lookahead, 0);
if (cpi->oxcf.error_resilient_mode == 0 && cpi->oxcf.pass == 2 &&
cpi->svc.encode_empty_frame_state == NEED_TO_ENCODE &&
lc->rc.frames_to_key != 0 &&
!(buf != NULL && (buf->flags & VPX_EFLAG_FORCE_KF))) {
if ((cpi->svc.number_temporal_layers > 1 &&
cpi->svc.temporal_layer_id < cpi->svc.number_temporal_layers - 1) ||
(cpi->svc.number_spatial_layers > 1 &&
cpi->svc.spatial_layer_id == 0)) {
struct lookahead_entry *buf = vp9_lookahead_peek(cpi->lookahead, 0);
if (buf != NULL) {
cpi->svc.empty_frame.ts_start = buf->ts_start;
cpi->svc.empty_frame.ts_end = buf->ts_end;
cpi->svc.encode_empty_frame_state = ENCODING;
cpi->common.show_frame = 0;
cpi->ref_frame_flags = 0;
cpi->common.frame_type = INTER_FRAME;
cpi->lst_fb_idx =
cpi->gld_fb_idx = cpi->alt_fb_idx = SMALL_FRAME_FB_IDX;
if (cpi->svc.encode_intra_empty_frame != 0)
cpi->common.intra_only = 1;
width = SMALL_FRAME_WIDTH;
height = SMALL_FRAME_HEIGHT;
}
}
}
cpi->oxcf.worst_allowed_q = vp9_quantizer_to_qindex(lc->max_q);
cpi->oxcf.best_allowed_q = vp9_quantizer_to_qindex(lc->min_q);
vp9_change_config(cpi, &cpi->oxcf);
if (vp9_set_size_literal(cpi, width, height) != 0)
return VPX_CODEC_INVALID_PARAM;
vp9_set_high_precision_mv(cpi, 1);
cpi->alt_ref_source = get_layer_context(cpi)->alt_ref_source;
return 0;
}
static int copy_svc_params(VP9_COMP *const cpi, struct lookahead_entry *buf) {
int layer_id;
vpx_svc_parameters_t *layer_param;
LAYER_CONTEXT *lc;
int count = 1 << (cpi->svc.number_temporal_layers - 1);
// Find the next layer to be encoded
for (layer_id = 0; layer_id < cpi->svc.number_spatial_layers; ++layer_id) {
if (buf->svc_params[layer_id].spatial_layer >=0)
break;
}
if (layer_id == cpi->svc.number_spatial_layers)
return 1;
layer_param = &buf->svc_params[layer_id];
cpi->svc.spatial_layer_id = layer_param->spatial_layer;
cpi->svc.temporal_layer_id = layer_param->temporal_layer;
cpi->ref_frame_flags = VP9_ALT_FLAG | VP9_GOLD_FLAG | VP9_LAST_FLAG;
lc = &cpi->svc.layer_context[cpi->svc.spatial_layer_id];
cpi->svc.temporal_layer_id = 0;
while ((lc->current_video_frame_in_layer % count) != 0) {
++cpi->svc.temporal_layer_id;
count >>= 1;
}
cpi->lst_fb_idx =
cpi->svc.spatial_layer_id * cpi->svc.number_temporal_layers +
cpi->svc.temporal_layer_id;
if (lc->frames_from_key_frame < cpi->svc.number_temporal_layers)
cpi->ref_frame_flags &= ~VP9_LAST_FLAG;
if (cpi->svc.spatial_layer_id == 0) {
if (cpi->svc.temporal_layer_id == 0)
cpi->gld_fb_idx = lc->gold_ref_idx >= 0 ?
lc->gold_ref_idx : cpi->lst_fb_idx;
else
cpi->gld_fb_idx = cpi->lst_fb_idx - 1;
} else {
if (cpi->svc.temporal_layer_id == 0)
cpi->gld_fb_idx = cpi->svc.spatial_layer_id -
cpi->svc.number_temporal_layers;
else
cpi->gld_fb_idx = cpi->lst_fb_idx - 1;
}
if (lc->current_video_frame_in_layer == 0) {
if (cpi->svc.spatial_layer_id >= 2) {
cpi->alt_fb_idx =
cpi->svc.spatial_layer_id - 2 * cpi->svc.number_temporal_layers;
} else {
cpi->alt_fb_idx = cpi->lst_fb_idx;
cpi->ref_frame_flags &= (~VP9_LAST_FLAG & ~VP9_ALT_FLAG);
}
} else {
if (cpi->oxcf.ss_play_alternate[cpi->svc.spatial_layer_id]) {
cpi->alt_fb_idx = lc->alt_ref_idx;
if (!lc->has_alt_frame)
cpi->ref_frame_flags &= (~VP9_ALT_FLAG);
} else {
// Find a proper alt_fb_idx for layers that don't have alt ref frame
if (cpi->svc.spatial_layer_id == 0) {
cpi->alt_fb_idx = cpi->lst_fb_idx;
} else {
LAYER_CONTEXT *lc_lower =
&cpi->svc.layer_context[cpi->svc.spatial_layer_id - 1];
if (cpi->oxcf.ss_play_alternate[cpi->svc.spatial_layer_id - 1] &&
lc_lower->alt_ref_source != NULL)
cpi->alt_fb_idx = lc_lower->alt_ref_idx;
else if (cpi->svc.spatial_layer_id >= 2)
cpi->alt_fb_idx =
cpi->svc.spatial_layer_id - 2 * cpi->svc.number_temporal_layers;
else
cpi->alt_fb_idx = cpi->lst_fb_idx;
}
}
}
if (vp9_set_size_literal(cpi, layer_param->width, layer_param->height) != 0)
return VPX_CODEC_INVALID_PARAM;
cpi->oxcf.worst_allowed_q =
vp9_quantizer_to_qindex(layer_param->max_quantizer);
cpi->oxcf.best_allowed_q =
vp9_quantizer_to_qindex(layer_param->min_quantizer);
vp9_change_config(cpi, &cpi->oxcf);
vp9_set_high_precision_mv(cpi, 1);
cpi->alt_ref_source = get_layer_context(cpi)->alt_ref_source;
return 0;
}
