RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-02-24 07:46:56 +00:00
Code Issues Projects Releases Wiki Activity

avfilter/af_acrossover: reduce memory usage

Browse Source 
Split biquad coefficients from biquad state.
This commit is contained in:
Paul B Mahol 2020-11-29 10:12:26 +01:00
parent 7eb9cf593e
commit c5cdec9731
1 changed files with 42 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
libavfilter/af_acrossover.c
View File

@ -39,9 +39,12 @@
#define MAX_SPLITS 16
#define MAX_BANDS MAX_SPLITS + 1
typedef struct BiquadContext {
typedef struct BiquadCoeffs {
double b0, b1, b2;
double a1, a2;
} BiquadCoeffs;
typedef struct BiquadContext {
double z1, z2;
} BiquadContext;
@ -65,6 +68,10 @@ typedef struct AudioCrossoverContext {
int nb_splits;
float *splits;
BiquadCoeffs lp[MAX_BANDS][20];
BiquadCoeffs hp[MAX_BANDS][20];
BiquadCoeffs ap[MAX_BANDS][20];
CrossoverChannel *xover;
AVFrame *input_frame;
@ -158,7 +165,7 @@ static av_cold int init(AVFilterContext *ctx)
return ret;
}
static void set_lp(BiquadContext *b, double fc, double q, double sr)
static void set_lp(BiquadCoeffs *b, double fc, double q, double sr)
{
double omega = M_PI * fc / sr;
double cosine = cos(omega);
@ -178,7 +185,7 @@ static void set_lp(BiquadContext *b, double fc, double q, double sr)
b->a2 = -a2 / a0;
}
static void set_hp(BiquadContext *b, double fc, double q, double sr)
static void set_hp(BiquadCoeffs *b, double fc, double q, double sr)
{
double omega = M_PI * fc / sr;
double cosine = cos(omega);
@ -198,7 +205,7 @@ static void set_hp(BiquadContext *b, double fc, double q, double sr)
b->a2 = -a2 / a0;
}
static void set_ap(BiquadContext *b, double fc, double q, double sr)
static void set_ap(BiquadCoeffs *b, double fc, double q, double sr)
{
double omega = M_PI * fc / sr;
double cosine = cos(omega);
@ -218,7 +225,7 @@ static void set_ap(BiquadContext *b, double fc, double q, double sr)
b->a2 = -a2 / a0;
}
static void set_ap1(BiquadContext *b, double fc, double sr)
static void set_ap1(BiquadCoeffs *b, double fc, double sr)
{
double omega = M_PI * fc / sr;
@ -268,15 +275,16 @@ static int query_formats(AVFilterContext *ctx)
}
#define BIQUAD_PROCESS(name, type) \
static void biquad_process_## name(BiquadContext *b, \
static void biquad_process_## name(const BiquadCoeffs *const c,\
BiquadContext *b, \
type *dst, const type *src, \
int nb_samples) \
{ \
const type b0 = b->b0; \
const type b1 = b->b1; \
const type b2 = b->b2; \
const type a1 = b->a1; \
const type a2 = b->a2; \
const type b0 = c->b0; \
const type b1 = c->b1; \
const type b2 = c->b2; \
const type a1 = c->a1; \
const type a2 = c->a2; \
type z1 = b->z1; \
type z2 = b->z2; \
\
@ -321,16 +329,18 @@ static int filter_channels_## name(AVFilterContext *ctx, void *arg, int jobnr, i
type *dst = (type *)frames[band + 1]->extended_data[ch]; \
const type *hsrc = f == 0 ? prv : dst; \
BiquadContext *hp = &xover->hp[band][f]; \
BiquadCoeffs *hpc = &s->hp[band][f]; \
\
biquad_process_## name(hp, dst, hsrc, nb_samples); \
biquad_process_## name(hpc, hp, dst, hsrc, nb_samples); \
} \
\
for (int f = 0; band + 1 < ctx->nb_outputs && f < s->filter_count; f++) { \
type *dst = (type *)frames[band]->extended_data[ch]; \
const type *lsrc = dst; \
BiquadContext *lp = &xover->lp[band][f]; \
BiquadCoeffs *lpc = &s->lp[band][f]; \
\
biquad_process_## name(lp, dst, lsrc, nb_samples); \
biquad_process_## name(lpc, lp, dst, lsrc, nb_samples); \
} \
\
for (int aband = band + 1; aband + 1 < ctx->nb_outputs; aband++) { \
@ -338,16 +348,18 @@ static int filter_channels_## name(AVFilterContext *ctx, void *arg, int jobnr, i
const type *asrc = (const type *)frames[band]->extended_data[ch]; \
type *dst = (type *)frames[band]->extended_data[ch]; \
BiquadContext *ap = &xover->ap[band][aband][0]; \
BiquadCoeffs *apc = &s->ap[aband][0]; \
\
biquad_process_## name(ap, dst, asrc, nb_samples); \
biquad_process_## name(apc, ap, dst, asrc, nb_samples); \
} \
\
for (int f = s->first_order; f < s->ap_filter_count; f++) { \
const type *asrc = (const type *)frames[band]->extended_data[ch]; \
type *dst = (type *)frames[band]->extended_data[ch]; \
BiquadContext *ap = &xover->ap[band][aband][f]; \
BiquadCoeffs *apc = &s->ap[aband][f]; \
\
biquad_process_## name(ap, dst, asrc, nb_samples); \
biquad_process_## name(apc, ap, dst, asrc, nb_samples); \
} \
} \
} \
@ -385,29 +397,26 @@ static int config_input(AVFilterLink *inlink)
s->ap_filter_count = s->filter_count / 2 + s->first_order;
calc_q_factors(s->order, q);
for (int ch = 0; ch < inlink->channels; ch++) {
for (int band = 0; band <= s->nb_splits; band++) {
if (s->first_order) {
set_lp(&s->xover[ch].lp[band][0], s->splits[band], 0.5, sample_rate);
set_hp(&s->xover[ch].hp[band][0], s->splits[band], 0.5, sample_rate);
}
for (int band = 0; band <= s->nb_splits; band++) {
if (s->first_order) {
set_lp(&s->lp[band][0], s->splits[band], 0.5, sample_rate);
set_hp(&s->hp[band][0], s->splits[band], 0.5, sample_rate);
}
for (int n = s->first_order; n < s->filter_count; n++) {
const int idx = s->filter_count / 2 - ((n + s->first_order) / 2 - s->first_order) - 1;
for (int n = s->first_order; n < s->filter_count; n++) {
const int idx = s->filter_count / 2 - ((n + s->first_order) / 2 - s->first_order) - 1;
set_lp(&s->xover[ch].lp[band][n], s->splits[band], q[idx], sample_rate);
set_hp(&s->xover[ch].hp[band][n], s->splits[band], q[idx], sample_rate);
}
set_lp(&s->lp[band][n], s->splits[band], q[idx], sample_rate);
set_hp(&s->hp[band][n], s->splits[band], q[idx], sample_rate);
}
for (int x = 0; x <= s->nb_splits && s->first_order; x++)
set_ap1(&s->xover[ch].ap[x][band][0], s->splits[band], sample_rate);
if (s->first_order)
set_ap1(&s->ap[band][0], s->splits[band], sample_rate);
for (int n = s->first_order; n < s->ap_filter_count; n++) {
const int idx = (s->filter_count / 2 - ((n * 2 + s->first_order) / 2 - s->first_order) - 1);
for (int n = s->first_order; n < s->ap_filter_count; n++) {
const int idx = (s->filter_count / 2 - ((n * 2 + s->first_order) / 2 - s->first_order) - 1);
for (int x = 0; x <= s->nb_splits; x++)
set_ap(&s->xover[ch].ap[x][band][n], s->splits[band], q[idx], sample_rate);
}
set_ap(&s->ap[band][n], s->splits[band], q[idx], sample_rate);
}
}