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more encoder param tuning

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minjaesong
2025-09-28 20:28:11 +09:00
parent 6ff634cc12
commit 65a01f36a4
3 changed files with 44 additions and 7 deletions
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29
video_encoder/encoder_tav.c
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@@ -152,8 +152,8 @@ static const int QUALITY_CG[] = {240, 180, 120, 60, 30, 5};
//static const int QUALITY_CG[] = {120, 60, 30, 15, 10, 4};
// psychovisual tuning parameters
static const float ANISOTROPY_MULT[] = {1.8f, 1.6f, 1.4f, 1.2f, 1.0f, 1.0f};
static const float ANISOTROPY_BIAS[] = {0.2f, 0.1f, 0.0f, 0.0f, 0.0f, 0.0f};
static const float ANISOTROPY_MULT[] = {2.0f, 1.8f, 1.6f, 1.4f, 1.2f, 1.0f};
static const float ANISOTROPY_BIAS[] = {0.4f, 0.2f, 0.1f, 0.0f, 0.0f, 0.0f};
static const float ANISOTROPY_MULT_CHROMA[] = {6.6f, 5.5f, 4.4f, 3.3f, 2.2f, 1.1f};
static const float ANISOTROPY_BIAS_CHROMA[] = {1.0f, 0.8f, 0.6f, 0.4f, 0.2f, 0.0f};
@@ -668,6 +668,9 @@ static void dwt_dd4_forward_1d(float *data, int length) {
static void dwt_bior137_forward_1d(float *data, int length) {
if (length < 2) return;
const float K = 1.230174105f;
float *temp = malloc(length * sizeof(float));
int half = (length + 1) / 2;
@@ -693,6 +696,16 @@ static void dwt_bior137_forward_1d(float *data, int length) {
temp[i] = data[2 * i] + update;
}
// Step 5: Scaling - s[i] *= K, d[i] /= K
for (int i = 0; i < half; i++) {
temp[i] *= K; // Low-pass coefficients
}
for (int i = 0; i < length / 2; i++) {
if (half + i < length) {
temp[half + i] /= K; // High-pass coefficients
}
}
memcpy(data, temp, length * sizeof(float));
free(temp);
}
@@ -2757,6 +2770,18 @@ int main(int argc, char *argv[]) {
enc->quantiser_cg = enc->quantiser_co;
}
// disable perceptual tuning if wavelet filter is not CDF 9/7
if (enc->wavelet_filter != WAVELET_9_7_IRREVERSIBLE) {
enc->perceptual_tuning = 0;
// halve the quantiser if wavelet filter is not CDF 9/7 && not CDF 13/7
if (enc->wavelet_filter != WAVELET_BIORTHOGONAL_13_7) {
enc->quantiser_y = CLAMP(enc->quantiser_y >> 1, 1, 255);
enc->quantiser_co = CLAMP(enc->quantiser_co >> 1, 1, 255);
enc->quantiser_cg = CLAMP(enc->quantiser_cg >> 1, 1, 255);
}
}
if ((!enc->input_file && !enc->test_mode) || !enc->output_file) {
fprintf(stderr, "Error: Input and output files must be specified\n");
show_usage(argv[0]);