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avfilter/vf_fftfilt: cache rdft contexts 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-09-04 18:24:00 +02:00
parent ca7dc3ee90
commit 2726b2d7e8
1 changed files with 24 additions and 17 deletions
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41
libavfilter/vf_fftfilt.c
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@ -36,7 +36,10 @@
typedef struct FFTFILTContext {
const AVClass *class;
RDFTContext *rdft;
RDFTContext *hrdft[MAX_PLANES];
RDFTContext *vrdft[MAX_PLANES];
RDFTContext *ihrdft[MAX_PLANES];
RDFTContext *ivrdft[MAX_PLANES];
int rdft_hbits[MAX_PLANES];
int rdft_vbits[MAX_PLANES];
size_t rdft_hlen[MAX_PLANES];
@ -96,7 +99,6 @@ static void copy_rev (FFTSample *dest, int w, int w2)
static void rdft_horizontal(FFTFILTContext *s, AVFrame *in, int w, int h, int plane)
{
int i, j;
s->rdft = av_rdft_init(s->rdft_hbits[plane], DFT_R2C);
for (i = 0; i < h; i++) {
for (j = 0; j < w; j++)
@ -106,16 +108,13 @@ static void rdft_horizontal(FFTFILTContext *s, AVFrame *in, int w, int h, int pl
}
for (i = 0; i < h; i++)
av_rdft_calc(s->rdft, s->rdft_hdata[plane] + i * s->rdft_hlen[plane]);
av_rdft_end(s->rdft);
av_rdft_calc(s->hrdft[plane], s->rdft_hdata[plane] + i * s->rdft_hlen[plane]);
}
/*Vertical pass - RDFT*/
static void rdft_vertical(FFTFILTContext *s, int h, int plane)
{
int i, j;
s->rdft = av_rdft_init(s->rdft_vbits[plane], DFT_R2C);
for (i = 0; i < s->rdft_hlen[plane]; i++) {
for (j = 0; j < h; j++)
@ -125,33 +124,29 @@ static void rdft_vertical(FFTFILTContext *s, int h, int plane)
}
for (i = 0; i < s->rdft_hlen[plane]; i++)
av_rdft_calc(s->rdft, s->rdft_vdata[plane] + i * s->rdft_vlen[plane]);
av_rdft_end(s->rdft);
av_rdft_calc(s->vrdft[plane], s->rdft_vdata[plane] + i * s->rdft_vlen[plane]);
}
/*Vertical pass - IRDFT*/
static void irdft_vertical(FFTFILTContext *s, int h, int plane)
{
int i, j;
s->rdft = av_rdft_init(s->rdft_vbits[plane], IDFT_C2R);
for (i = 0; i < s->rdft_hlen[plane]; i++)
av_rdft_calc(s->rdft, s->rdft_vdata[plane] + i * s->rdft_vlen[plane]);
av_rdft_calc(s->ivrdft[plane], s->rdft_vdata[plane] + i * s->rdft_vlen[plane]);
for (i = 0; i < s->rdft_hlen[plane]; i++)
for (j = 0; j < h; j++)
s->rdft_hdata[plane][j * s->rdft_hlen[plane] + i] =
s->rdft_vdata[plane][i * s->rdft_vlen[plane] + j];
av_rdft_end(s->rdft);
}
/*Horizontal pass - IRDFT*/
static void irdft_horizontal(FFTFILTContext *s, AVFrame *out, int w, int h, int plane)
{
int i, j;
s->rdft = av_rdft_init(s->rdft_hbits[plane], IDFT_C2R);
for (i = 0; i < h; i++)
av_rdft_calc(s->rdft, s->rdft_hdata[plane] + i * s->rdft_hlen[plane]);
av_rdft_calc(s->ihrdft[plane], s->rdft_hdata[plane] + i * s->rdft_hlen[plane]);
for (i = 0; i < h; i++)
for (j = 0; j < w; j++)
@ -159,8 +154,6 @@ static void irdft_horizontal(FFTFILTContext *s, AVFrame *out, int w, int h, int
*s->rdft_hlen[plane] + j] * 4 /
(s->rdft_hlen[plane] *
s->rdft_vlen[plane]), 0, 255);
av_rdft_end(s->rdft);
}
static av_cold int initialize(AVFilterContext *ctx)
@ -216,12 +209,22 @@ static int config_props(AVFilterLink *inlink)
if (!(s->rdft_hdata[i] = av_malloc_array(h, s->rdft_hlen[i] * sizeof(FFTSample))))
return AVERROR(ENOMEM);
if (!(s->hrdft[i] = av_rdft_init(s->rdft_hbits[i], DFT_R2C)))
return AVERROR(ENOMEM);
if (!(s->ihrdft[i] = av_rdft_init(s->rdft_hbits[i], IDFT_C2R)))
return AVERROR(ENOMEM);
/* RDFT - Array initialization for Vertical pass*/
for (rdft_vbits = 1; 1 << rdft_vbits < h*10/9; rdft_vbits++);
s->rdft_vbits[i] = rdft_vbits;
s->rdft_vlen[i] = 1 << rdft_vbits;
if (!(s->rdft_vdata[i] = av_malloc_array(s->rdft_hlen[i], s->rdft_vlen[i] * sizeof(FFTSample))))
return AVERROR(ENOMEM);
if (!(s->vrdft[i] = av_rdft_init(s->rdft_vbits[i], DFT_R2C)))
return AVERROR(ENOMEM);
if (!(s->ivrdft[i] = av_rdft_init(s->rdft_vbits[i], IDFT_C2R)))
return AVERROR(ENOMEM);
}
/*Luminance value - Array initialization*/
@ -300,6 +303,10 @@ static av_cold void uninit(AVFilterContext *ctx)
av_free(s->rdft_vdata[i]);
av_expr_free(s->weight_expr[i]);
av_free(s->weight[i]);
av_rdft_end(s->hrdft[i]);
av_rdft_end(s->ihrdft[i]);
av_rdft_end(s->vrdft[i]);
av_rdft_end(s->ivrdft[i]);
}
}