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vf_hqdn3d: support 16bit colordepth

tags/n1.0
Loren Merritt Loren Merritt 13 years ago
parent
44b0b85fe9
commit
566858a770
1 changed files with 46 additions and 24 deletions
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  1. +46
    -24
      libavfilter/vf_hqdn3d.c

+ 46
- 24
libavfilter/vf_hqdn3d.c View File

@@ -35,21 +35,24 @@
#include "video.h"

typedef struct {
int16_t coefs[4][512*16];
int16_t *coefs[4];
uint16_t *line;
uint16_t *frame_prev[3];
double strength[4];
int hsub, vsub;
int depth;
} HQDN3DContext;

#define LUT_BITS (depth==16 ? 8 : 4)
#define RIGHTSHIFT(a,b) (((a)+(((1<<(b))-1)>>1))>>(b))
#define LOAD(x) ((depth==8 ? src[x] : AV_RN16A(src+(x)*2)) << (16-depth))
#define STORE(x,val) (depth==8 ? dst[x] = RIGHTSHIFT(val, 16-depth)\
: AV_WN16A(dst+(x)*2, RIGHTSHIFT(val, 16-depth)))

static inline uint32_t lowpass(int prev, int cur, int16_t *coef)
av_always_inline
static inline uint32_t lowpass(int prev, int cur, int16_t *coef, int depth)
{
int d = (prev-cur)>>4;
int d = (prev - cur) >> (8 - LUT_BITS);
return cur + coef[d];
}

@@ -62,11 +65,11 @@ static void denoise_temporal(uint8_t *src, uint8_t *dst,
long x, y;
uint32_t tmp;

temporal += 0x1000;
temporal += 256 << LUT_BITS;

for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
frame_ant[x] = tmp = lowpass(frame_ant[x], LOAD(x), temporal);
frame_ant[x] = tmp = lowpass(frame_ant[x], LOAD(x), temporal, depth);
STORE(x, tmp);
}
src += sstride;
@@ -85,15 +88,15 @@ static void denoise_spatial(uint8_t *src, uint8_t *dst,
uint32_t pixel_ant;
uint32_t tmp;

spatial += 0x1000;
temporal += 0x1000;
spatial += 256 << LUT_BITS;
temporal += 256 << LUT_BITS;

/* First line has no top neighbor. Only left one for each tmp and
* last frame */
pixel_ant = LOAD(0);
for (x = 0; x < w; x++) {
line_ant[x] = tmp = pixel_ant = lowpass(pixel_ant, LOAD(x), spatial);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal);
line_ant[x] = tmp = pixel_ant = lowpass(pixel_ant, LOAD(x), spatial, depth);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
STORE(x, tmp);
}

@@ -103,13 +106,13 @@ static void denoise_spatial(uint8_t *src, uint8_t *dst,
frame_ant += w;
pixel_ant = LOAD(0);
for (x = 0; x < w-1; x++) {
line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial);
pixel_ant = lowpass(pixel_ant, LOAD(x+1), spatial);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal);
line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial, depth);
pixel_ant = lowpass(pixel_ant, LOAD(x+1), spatial, depth);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
STORE(x, tmp);
}
line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal);
line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial, depth);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
STORE(x, tmp);
}
}
@@ -120,6 +123,8 @@ static void denoise_depth(uint8_t *src, uint8_t *dst,
int w, int h, int sstride, int dstride,
int16_t *spatial, int16_t *temporal, int depth)
{
// FIXME: For 16bit depth, frame_ant could be a pointer to the previous
// filtered frame rather than a separate buffer.
long x, y;
uint16_t *frame_ant = *frame_ant_ptr;
if (!frame_ant) {
@@ -145,24 +150,28 @@ static void denoise_depth(uint8_t *src, uint8_t *dst,
case 8: denoise_depth(__VA_ARGS__, 8); break;\
case 9: denoise_depth(__VA_ARGS__, 9); break;\
case 10: denoise_depth(__VA_ARGS__, 10); break;\
case 16: denoise_depth(__VA_ARGS__, 16); break;\
}

static void precalc_coefs(int16_t *ct, double dist25)
static int16_t *precalc_coefs(double dist25, int depth)
{
int i;
double gamma, simil, C;
int16_t *ct = av_malloc((512<<LUT_BITS)*sizeof(int16_t));
if (!ct)
return NULL;

gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);

for (i = -255*16; i <= 255*16; i++) {
// lowpass() truncates (not rounds) the diff, so +15/32 for the midpoint of the bin.
double f = (i + 15.0/32.0) / 16.0;
for (i = -255<<LUT_BITS; i <= 255<<LUT_BITS; i++) {
double f = ((i<<(9-LUT_BITS)) + (1<<(8-LUT_BITS)) - 1) / 512.0; // midpoint of the bin
simil = 1.0 - FFABS(f) / 255.0;
C = pow(simil, gamma) * 256.0 * f;
ct[16*256+i] = lrint(C);
ct[(256<<LUT_BITS)+i] = lrint(C);
}

ct[0] = !!dist25;
return ct;
}

#define PARAM1_DEFAULT 4.0
@@ -210,6 +219,11 @@ static int init(AVFilterContext *ctx, const char *args)
}
}

hqdn3d->strength[0] = lum_spac;
hqdn3d->strength[1] = lum_tmp;
hqdn3d->strength[2] = chrom_spac;
hqdn3d->strength[3] = chrom_tmp;

av_log(ctx, AV_LOG_VERBOSE, "ls:%lf cs:%lf lt:%lf ct:%lf\n",
lum_spac, chrom_spac, lum_tmp, chrom_tmp);
if (lum_spac < 0 || chrom_spac < 0 || isnan(chrom_tmp)) {
@@ -219,11 +233,6 @@ static int init(AVFilterContext *ctx, const char *args)
return AVERROR(EINVAL);
}

precalc_coefs(hqdn3d->coefs[0], lum_spac);
precalc_coefs(hqdn3d->coefs[1], lum_tmp);
precalc_coefs(hqdn3d->coefs[2], chrom_spac);
precalc_coefs(hqdn3d->coefs[3], chrom_tmp);

return 0;
}

@@ -231,6 +240,10 @@ static void uninit(AVFilterContext *ctx)
{
HQDN3DContext *hqdn3d = ctx->priv;

av_freep(&hqdn3d->coefs[0]);
av_freep(&hqdn3d->coefs[1]);
av_freep(&hqdn3d->coefs[2]);
av_freep(&hqdn3d->coefs[3]);
av_freep(&hqdn3d->line);
av_freep(&hqdn3d->frame_prev[0]);
av_freep(&hqdn3d->frame_prev[1]);
@@ -256,6 +269,9 @@ static int query_formats(AVFilterContext *ctx)
AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
PIX_FMT_NONE
};

@@ -276,6 +292,12 @@ static int config_input(AVFilterLink *inlink)
if (!hqdn3d->line)
return AVERROR(ENOMEM);

for (int i=0; i<4; i++) {
hqdn3d->coefs[i] = precalc_coefs(hqdn3d->strength[i], hqdn3d->depth);
if (!hqdn3d->coefs[i])
return AVERROR(ENOMEM);
}

return 0;
}



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