vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
vpx_codec_iface_t *iface,
vpx_codec_enc_cfg_t *enc_cfg) {
vpx_codec_err_t res;
int i, sl, tl;
SvcInternal_t *const si = get_svc_internal(svc_ctx);
if (svc_ctx == NULL || codec_ctx == NULL || iface == NULL ||
enc_cfg == NULL) {
return VPX_CODEC_INVALID_PARAM;
}
if (si == NULL) return VPX_CODEC_MEM_ERROR;
si->codec_ctx = codec_ctx;
si->width = enc_cfg->g_w;
si->height = enc_cfg->g_h;
si->kf_dist = enc_cfg->kf_max_dist;
if (svc_ctx->spatial_layers == 0)
svc_ctx->spatial_layers = VPX_SS_DEFAULT_LAYERS;
if (svc_ctx->spatial_layers < 1 ||
svc_ctx->spatial_layers > VPX_SS_MAX_LAYERS) {
svc_log(svc_ctx, SVC_LOG_ERROR, "spatial layers: invalid value: %d\n",
svc_ctx->spatial_layers);
return VPX_CODEC_INVALID_PARAM;
}
// Note: temporal_layering_mode only applies to one-pass CBR
// si->svc_params.temporal_layering_mode = svc_ctx->temporal_layering_mode;
if (svc_ctx->temporal_layering_mode == 3) {
svc_ctx->temporal_layers = 3;
} else if (svc_ctx->temporal_layering_mode == 2 ||
svc_ctx->temporal_layering_mode == 1) {
svc_ctx->temporal_layers = 2;
}
for (sl = 0; sl < VPX_SS_MAX_LAYERS; ++sl) {
si->svc_params.scaling_factor_num[sl] = DEFAULT_SCALE_FACTORS_NUM[sl];
si->svc_params.scaling_factor_den[sl] = DEFAULT_SCALE_FACTORS_DEN[sl];
si->svc_params.speed_per_layer[sl] = svc_ctx->speed;
}
if (enc_cfg->rc_end_usage == VPX_CBR && enc_cfg->g_pass == VPX_RC_ONE_PASS &&
svc_ctx->spatial_layers <= 3) {
for (sl = 0; sl < svc_ctx->spatial_layers; ++sl) {
int sl2 = (svc_ctx->spatial_layers == 2) ? sl + 1 : sl;
si->svc_params.scaling_factor_num[sl] = DEFAULT_SCALE_FACTORS_NUM_2x[sl2];
si->svc_params.scaling_factor_den[sl] = DEFAULT_SCALE_FACTORS_DEN_2x[sl2];
}
if (svc_ctx->spatial_layers == 1) {
si->svc_params.scaling_factor_num[0] = 1;
si->svc_params.scaling_factor_den[0] = 1;
}
}
for (tl = 0; tl < svc_ctx->temporal_layers; ++tl) {
for (sl = 0; sl < svc_ctx->spatial_layers; ++sl) {
i = sl * svc_ctx->temporal_layers + tl;
si->svc_params.max_quantizers[i] = MAX_QUANTIZER;
si->svc_params.min_quantizers[i] = 0;
if (enc_cfg->rc_end_usage == VPX_CBR &&
enc_cfg->g_pass == VPX_RC_ONE_PASS) {
si->svc_params.max_quantizers[i] = 56;
si->svc_params.min_quantizers[i] = 2;
}
}
}
// Parse aggregate command line options. Options must start with
// "layers=xx" then followed by other options
res = parse_options(svc_ctx, si->options);
if (res != VPX_CODEC_OK) return res;
if (svc_ctx->spatial_layers < 1) svc_ctx->spatial_layers = 1;
if (svc_ctx->spatial_layers > VPX_SS_MAX_LAYERS)
svc_ctx->spatial_layers = VPX_SS_MAX_LAYERS;
if (svc_ctx->temporal_layers < 1) svc_ctx->temporal_layers = 1;
if (svc_ctx->temporal_layers > VPX_TS_MAX_LAYERS)
svc_ctx->temporal_layers = VPX_TS_MAX_LAYERS;
if (svc_ctx->temporal_layers * svc_ctx->spatial_layers > VPX_MAX_LAYERS) {
svc_log(svc_ctx, SVC_LOG_ERROR,
"spatial layers * temporal layers exceeds the maximum number of "
"allowed layers of %d\n",
svc_ctx->spatial_layers * svc_ctx->temporal_layers,
(int)VPX_MAX_LAYERS);
return VPX_CODEC_INVALID_PARAM;
}
res = assign_layer_bitrates(svc_ctx, enc_cfg);
if (res != VPX_CODEC_OK) {
svc_log(svc_ctx, SVC_LOG_ERROR,
"layer bitrates incorrect: \n"
"1) spatial layer bitrates should sum up to target \n"
"2) temporal layer bitrates should be increasing within \n"
"a spatial layer \n");
return VPX_CODEC_INVALID_PARAM;
}
#if CONFIG_SPATIAL_SVC
for (i = 0; i < svc_ctx->spatial_layers; ++i)
enc_cfg->ss_enable_auto_alt_ref[i] = si->enable_auto_alt_ref[i];
#endif
if (svc_ctx->temporal_layers > 1) {
int i;
for (i = 0; i < svc_ctx->temporal_layers; ++i) {
enc_cfg->ts_target_bitrate[i] =
enc_cfg->rc_target_bitrate / svc_ctx->temporal_layers;
enc_cfg->ts_rate_decimator[i] = 1 << (svc_ctx->temporal_layers - 1 - i);
}
}
if (svc_ctx->threads) enc_cfg->g_threads = svc_ctx->threads;
// Modify encoder configuration
enc_cfg->ss_number_layers = svc_ctx->spatial_layers;
enc_cfg->ts_number_layers = svc_ctx->temporal_layers;
if (enc_cfg->rc_end_usage == VPX_CBR) {
enc_cfg->rc_resize_allowed = 0;
enc_cfg->rc_min_quantizer = 2;
enc_cfg->rc_max_quantizer = 56;
enc_cfg->rc_undershoot_pct = 50;
enc_cfg->rc_overshoot_pct = 50;
enc_cfg->rc_buf_initial_sz = 500;
enc_cfg->rc_buf_optimal_sz = 600;
enc_cfg->rc_buf_sz = 1000;
enc_cfg->rc_dropframe_thresh = 0;
}
if (enc_cfg->g_error_resilient == 0 && si->use_multiple_frame_contexts == 0)
enc_cfg->g_error_resilient = 1;
// Initialize codec
res = vpx_codec_enc_init(codec_ctx, iface, enc_cfg, VPX_CODEC_USE_PSNR);
if (res != VPX_CODEC_OK) {
svc_log(svc_ctx, SVC_LOG_ERROR, "svc_enc_init error\n");
return res;
}
if (svc_ctx->spatial_layers > 1 || svc_ctx->temporal_layers > 1) {
vpx_codec_control(codec_ctx, VP9E_SET_SVC, 1);
vpx_codec_control(codec_ctx, VP9E_SET_SVC_PARAMETERS, &si->svc_params);
}
return VPX_CODEC_OK;
}
vpx_codec_err_t vpx_svc_init(SvcContext *svc_ctx, vpx_codec_ctx_t *codec_ctx,
vpx_codec_iface_t *iface,
vpx_codec_enc_cfg_t *enc_cfg) {
vpx_codec_err_t res;
int i;
SvcInternal *const si = get_svc_internal(svc_ctx);
if (svc_ctx == NULL || codec_ctx == NULL || iface == NULL ||
enc_cfg == NULL) {
return VPX_CODEC_INVALID_PARAM;
}
if (si == NULL) return VPX_CODEC_MEM_ERROR;
si->codec_ctx = codec_ctx;
si->width = enc_cfg->g_w;
si->height = enc_cfg->g_h;
if (enc_cfg->kf_max_dist < 2) {
svc_log(svc_ctx, SVC_LOG_ERROR, "key frame distance too small: %d\n",
enc_cfg->kf_max_dist);
return VPX_CODEC_INVALID_PARAM;
}
si->kf_dist = enc_cfg->kf_max_dist;
if (svc_ctx->spatial_layers == 0)
svc_ctx->spatial_layers = VPX_SS_DEFAULT_LAYERS;
if (svc_ctx->spatial_layers < 1 ||
svc_ctx->spatial_layers > VPX_SS_MAX_LAYERS) {
svc_log(svc_ctx, SVC_LOG_ERROR, "spatial layers: invalid value: %d\n",
svc_ctx->spatial_layers);
return VPX_CODEC_INVALID_PARAM;
}
for (i = 0; i < VPX_SS_MAX_LAYERS; ++i) {
si->quantizer[i] = DEFAULT_QUANTIZER_VALUES[i];
si->scaling_factor_num[i] = DEFAULT_SCALE_FACTORS_NUM[i];
si->scaling_factor_den[i] = DEFAULT_SCALE_FACTORS_DEN[i];
}
if (strlen(si->quantizers) > 0) {
res = parse_layer_options_from_string(svc_ctx, QUANTIZER, si->quantizers,
si->quantizer, NULL);
if (res != VPX_CODEC_OK)
return res;
}
if (strlen(si->scale_factors) > 0) {
res = parse_layer_options_from_string(svc_ctx, SCALE_FACTOR,
si->scale_factors,
si->scaling_factor_num,
si->scaling_factor_den);
if (res != VPX_CODEC_OK)
return res;
}
// Parse aggregate command line options. Options must start with
// "layers=xx" then followed by other options
res = parse_options(svc_ctx, si->options);
if (res != VPX_CODEC_OK) return res;
if (svc_ctx->spatial_layers < 1)
svc_ctx->spatial_layers = 1;
if (svc_ctx->spatial_layers > VPX_SS_MAX_LAYERS)
svc_ctx->spatial_layers = VPX_SS_MAX_LAYERS;
if (svc_ctx->temporal_layers < 1)
svc_ctx->temporal_layers = 1;
if (svc_ctx->temporal_layers > VPX_TS_MAX_LAYERS)
svc_ctx->temporal_layers = VPX_TS_MAX_LAYERS;
assign_layer_bitrates(svc_ctx, enc_cfg);
#if CONFIG_SPATIAL_SVC
for (i = 0; i < svc_ctx->spatial_layers; ++i)
enc_cfg->ss_enable_auto_alt_ref[i] = si->enable_auto_alt_ref[i];
#endif
if (svc_ctx->temporal_layers > 1) {
int i;
for (i = 0; i < svc_ctx->temporal_layers; ++i) {
enc_cfg->ts_target_bitrate[i] = enc_cfg->rc_target_bitrate /
svc_ctx->temporal_layers;
enc_cfg->ts_rate_decimator[i] = 1 << (svc_ctx->temporal_layers - 1 - i);
}
}
// modify encoder configuration
enc_cfg->ss_number_layers = svc_ctx->spatial_layers;
enc_cfg->ts_number_layers = svc_ctx->temporal_layers;
if (enc_cfg->g_error_resilient == 0 && si->use_multiple_frame_contexts == 0)
enc_cfg->g_error_resilient = 1;
// Initialize codec
res = vpx_codec_enc_init(codec_ctx, iface, enc_cfg, VPX_CODEC_USE_PSNR);
if (res != VPX_CODEC_OK) {
svc_log(svc_ctx, SVC_LOG_ERROR, "svc_enc_init error\n");
return res;
}
vpx_codec_control(codec_ctx, VP9E_SET_SVC, 1);
return VPX_CODEC_OK;
}
