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Add weights for GOP 16 based on fitting a power curve to bits spent by HM

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This commit is contained in:
Joose Sainio 2020-03-19 11:13:43 +02:00
parent 27c11c030c
commit a304a8ea6e
1 changed files with 15 additions and 1 deletions
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16
src/encoder.c
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@ -812,7 +812,21 @@ static int encoder_control_init_gop_layer_weights(encoder_control_t * const enco
}
}
break;
case 5:
if(!encoder->cfg.gop_lowdelay) {
// These are obtained by running HM with RA GOP 16 collecting the ratio of bits spent for each
// layer from the CTC sequences and then fitting power curve
encoder->gop_layer_weights[0] = 13.0060187535 * pow(encoder->target_avg_bpp, -0.3727651453);
encoder->gop_layer_weights[1] = 7.3654107392 * pow(encoder->target_avg_bpp, -0.0854329266);
encoder->gop_layer_weights[2] = 3.6563990701 * pow(encoder->target_avg_bpp, -0.0576990493);
encoder->gop_layer_weights[3] = 2.1486937288 * pow(encoder->target_avg_bpp, -0.0155389471);
encoder->gop_layer_weights[4] = 1;
}
else {
fprintf(stderr, "Unsupported amount of layers (%d) for lowdelay GOP\n", num_layers);
return 0;
}
break;
default:
if (!encoder->cfg.gop_lowdelay && encoder->cfg.gop_len == 16) {
fprintf(stdout,