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avfilter/af_surround: split factors calculations

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From multiplication with magnitude.
This commit is contained in:
Paul B Mahol 2022-11-18 17:50:26 +01:00
parent 08b4c3d6d6
commit 3d33003d59
1 changed files with 82 additions and 55 deletions
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137
libavfilter/af_surround.c
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@ -96,9 +96,12 @@ typedef struct AudioSurroundContext {
int nb_in_channels;
int nb_out_channels;
AVFrame *factors;
AVFrame *input_in;
AVFrame *input;
AVFrame *output;
AVFrame *output_mag;
AVFrame *output_ph;
AVFrame *output_out;
AVFrame *overlap_buffer;
AVFrame *window;
@ -293,10 +296,14 @@ static int config_output(AVFilterLink *outlink)
set_output_levels(ctx);
s->factors = ff_get_audio_buffer(outlink, s->win_size + 2);
s->output_ph = ff_get_audio_buffer(outlink, s->win_size + 2);
s->output_mag = ff_get_audio_buffer(outlink, s->win_size + 2);
s->output_out = ff_get_audio_buffer(outlink, s->win_size + 2);
s->output = ff_get_audio_buffer(outlink, s->win_size + 2);
s->overlap_buffer = ff_get_audio_buffer(outlink, s->win_size * 2);
if (!s->overlap_buffer || !s->output || !s->output_out)
if (!s->overlap_buffer || !s->output || !s->output_out || !s->output_mag ||
!s->output_ph || !s->factors)
return AVERROR(ENOMEM);
s->rdft_size = s->win_size / 2 + 1;
@ -397,6 +404,9 @@ static int stereo_upmix(AVFilterContext *ctx, int ch)
{
AudioSurroundContext *s = ctx->priv;
float *dst = (float *)s->output->extended_data[ch];
float *factor = (float *)s->factors->extended_data[ch];
float *omag = (float *)s->output_mag->extended_data[ch];
float *oph = (float *)s->output_ph->extended_data[ch];
const float *mag_total = s->mag_total;
const int rdft_size = s->rdft_size;
const float *c_phase = s->c_phase;
@ -412,81 +422,95 @@ static int stereo_upmix(AVFilterContext *ctx, int ch)
switch (chan) {
case AV_CHAN_FRONT_CENTER:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(1.f - fabsf(x[n]), f_x) * powf((y[n] + 1.f) * .5f, f_y) * c_mag[n];
float ph = c_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(1.f - fabsf(x[n]), f_x) * powf((y[n] + 1.f) * .5f, f_y);
break;
case AV_CHAN_FRONT_LEFT:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(.5f * ( x[n] + 1.f), f_x) * powf((y[n] + 1.f) * .5f, f_y) * mag_total[n];
float ph = l_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(.5f * ( x[n] + 1.f), f_x) * powf((y[n] + 1.f) * .5f, f_y);
break;
case AV_CHAN_FRONT_RIGHT:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(.5f * (-x[n] + 1.f), f_x) * powf((y[n] + 1.f) * .5f, f_y) * mag_total[n];
float ph = r_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(.5f * (-x[n] + 1.f), f_x) * powf((y[n] + 1.f) * .5f, f_y);
break;
case AV_CHAN_LOW_FREQUENCY:
for (int n = 0; n < rdft_size; n++) {
float mag = lfe_mag[n];
float ph = c_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = lfe_mag[n];
break;
case AV_CHAN_BACK_CENTER:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(1.f - fabsf(x[n]), f_x) * powf((1.f - y[n]) * .5f, f_y) * mag_total[n];
float ph = c_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(1.f - fabsf(x[n]), f_x) * powf((1.f - y[n]) * .5f, f_y);
break;
case AV_CHAN_BACK_LEFT:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(.5f * ( x[n] + 1.f), f_x) * powf(1.f - ((y[n] + 1.f) * .5f), f_y) * mag_total[n];
float ph = l_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(.5f * ( x[n] + 1.f), f_x) * powf(1.f - ((y[n] + 1.f) * .5f), f_y);
break;
case AV_CHAN_BACK_RIGHT:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(.5f * (-x[n] + 1.f), f_x) * powf(1.f - ((y[n] + 1.f) * .5f), f_y) * mag_total[n];
float ph = r_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(.5f * (-x[n] + 1.f), f_x) * powf(1.f - ((y[n] + 1.f) * .5f), f_y);
break;
case AV_CHAN_SIDE_LEFT:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(.5f * ( x[n] + 1.f), f_x) * powf(1.f - fabsf(y[n]), f_y) * mag_total[n];
float ph = l_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(.5f * ( x[n] + 1.f), f_x) * powf(1.f - fabsf(y[n]), f_y);
break;
case AV_CHAN_SIDE_RIGHT:
for (int n = 0; n < rdft_size; n++) {
float mag = powf(.5f * (-x[n] + 1.f), f_x) * powf(1.f - fabsf(y[n]), f_y) * mag_total[n];
float ph = r_phase[n];
TRANSFORM
}
for (int n = 0; n < rdft_size; n++)
factor[n] = powf(.5f * (-x[n] + 1.f), f_x) * powf(1.f - fabsf(y[n]), f_y);
break;
default:
break;
}
switch (chan) {
case AV_CHAN_FRONT_CENTER:
memcpy(omag, c_mag, rdft_size * sizeof(*omag));
break;
case AV_CHAN_LOW_FREQUENCY:
memcpy(omag, lfe_mag, rdft_size * sizeof(*omag));
break;
case AV_CHAN_FRONT_LEFT:
case AV_CHAN_FRONT_RIGHT:
case AV_CHAN_BACK_CENTER:
case AV_CHAN_BACK_LEFT:
case AV_CHAN_BACK_RIGHT:
case AV_CHAN_SIDE_LEFT:
case AV_CHAN_SIDE_RIGHT:
memcpy(omag, mag_total, rdft_size * sizeof(*omag));
break;
default:
break;
}
switch (chan) {
case AV_CHAN_FRONT_CENTER:
case AV_CHAN_LOW_FREQUENCY:
case AV_CHAN_BACK_CENTER:
memcpy(oph, c_phase, rdft_size * sizeof(*oph));
break;
case AV_CHAN_FRONT_LEFT:
case AV_CHAN_BACK_LEFT:
case AV_CHAN_SIDE_LEFT:
memcpy(oph, l_phase, rdft_size * sizeof(*oph));
break;
case AV_CHAN_FRONT_RIGHT:
case AV_CHAN_BACK_RIGHT:
case AV_CHAN_SIDE_RIGHT:
memcpy(oph, r_phase, rdft_size * sizeof(*oph));
break;
default:
break;
}
for (int n = 0; n < rdft_size; n++)
omag[n] *= factor[n];
for (int n = 0; n < rdft_size; n++) {
const float mag = omag[n];
const float ph = oph[n];
TRANSFORM
}
return 0;
}
@ -1329,10 +1353,13 @@ static av_cold void uninit(AVFilterContext *ctx)
{
AudioSurroundContext *s = ctx->priv;
av_frame_free(&s->factors);
av_frame_free(&s->window);
av_frame_free(&s->input_in);
av_frame_free(&s->input);
av_frame_free(&s->output);
av_frame_free(&s->output_ph);
av_frame_free(&s->output_mag);
av_frame_free(&s->output_out);
av_frame_free(&s->overlap_buffer);