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avfilter/vf_normalize: add support for >8 depth

tags/n4.3
Paul B Mahol 5 years ago
parent
ac51173024
commit
feeef2f80c
1 changed files with 105 additions and 16 deletions
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  1. +105
    -16
      libavfilter/vf_normalize.c

+ 105
- 16
libavfilter/vf_normalize.c View File

@@ -73,6 +73,7 @@
*/

#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
@@ -82,12 +83,12 @@
#include "video.h"

typedef struct NormalizeHistory {
uint8_t *history; // History entries.
uint32_t history_sum; // Sum of history entries.
uint16_t *history; // History entries.
uint64_t history_sum; // Sum of history entries.
} NormalizeHistory;

typedef struct NormalizeLocal {
uint8_t in; // Original input byte value for this frame.
uint16_t in; // Original input byte value for this frame.
float smoothed; // Smoothed input value [0,255].
float out; // Output value [0,255]
} NormalizeLocal;
@@ -103,6 +104,9 @@ typedef struct NormalizeContext {
float strength;

uint8_t co[4]; // Offsets to R,G,B,A bytes respectively in each pixel
int depth;
int sblackpt[4];
int swhitept[4];
int num_components; // Number of components in the pixel format
int step;
int history_len; // Number of frames to average; based on smoothing factor
@@ -110,9 +114,9 @@ typedef struct NormalizeContext {

// Per-extremum, per-channel history, for temporal smoothing.
NormalizeHistory min[3], max[3]; // Min and max for each channel in {R,G,B}.
uint8_t *history_mem; // Single allocation for above history entries
uint16_t *history_mem; // Single allocation for above history entries

uint8_t lut[3][256]; // Lookup table
uint16_t lut[3][65536]; // Lookup table

void (*find_min_max)(struct NormalizeContext *s, AVFrame *in, NormalizeLocal min[3], NormalizeLocal max[3]);
void (*process)(struct NormalizeContext *s, AVFrame *in, AVFrame *out);
@@ -207,6 +211,80 @@ static void process_planar(NormalizeContext *s, AVFrame *in, AVFrame *out)
}
}

static void find_min_max_16(NormalizeContext *s, AVFrame *in, NormalizeLocal min[3], NormalizeLocal max[3])
{
for (int c = 0; c < 3; c++)
min[c].in = max[c].in = AV_RN16(in->data[0] + 2 * s->co[c]);
for (int y = 0; y < in->height; y++) {
uint16_t *inp = (uint16_t *)(in->data[0] + y * in->linesize[0]);
for (int x = 0; x < in->width; x++) {
for (int c = 0; c < 3; c++) {
min[c].in = FFMIN(min[c].in, inp[s->co[c]]);
max[c].in = FFMAX(max[c].in, inp[s->co[c]]);
}
inp += s->step;
}
}
}

static void process_16(NormalizeContext *s, AVFrame *in, AVFrame *out)
{
for (int y = 0; y < in->height; y++) {
uint16_t *inp = (uint16_t *)(in->data[0] + y * in->linesize[0]);
uint16_t *outp = (uint16_t *)(out->data[0] + y * out->linesize[0]);
for (int x = 0; x < in->width; x++) {
for (int c = 0; c < 3; c++)
outp[s->co[c]] = s->lut[c][inp[s->co[c]]];
if (s->num_components == 4)
// Copy alpha as-is.
outp[s->co[3]] = inp[s->co[3]];
inp += s->step;
outp += s->step;
}
}
}

static void find_min_max_planar_16(NormalizeContext *s, AVFrame *in, NormalizeLocal min[3], NormalizeLocal max[3])
{
min[0].in = max[0].in = AV_RN16(in->data[2]);
min[1].in = max[1].in = AV_RN16(in->data[0]);
min[2].in = max[2].in = AV_RN16(in->data[1]);
for (int y = 0; y < in->height; y++) {
uint16_t *inrp = (uint16_t *)(in->data[2] + y * in->linesize[2]);
uint16_t *ingp = (uint16_t *)(in->data[0] + y * in->linesize[0]);
uint16_t *inbp = (uint16_t *)(in->data[1] + y * in->linesize[1]);
for (int x = 0; x < in->width; x++) {
min[0].in = FFMIN(min[0].in, inrp[x]);
max[0].in = FFMAX(max[0].in, inrp[x]);
min[1].in = FFMIN(min[1].in, ingp[x]);
max[1].in = FFMAX(max[1].in, ingp[x]);
min[2].in = FFMIN(min[2].in, inbp[x]);
max[2].in = FFMAX(max[2].in, inbp[x]);
}
}
}

static void process_planar_16(NormalizeContext *s, AVFrame *in, AVFrame *out)
{
for (int y = 0; y < in->height; y++) {
uint16_t *inrp = (uint16_t *)(in->data[2] + y * in->linesize[2]);
uint16_t *ingp = (uint16_t *)(in->data[0] + y * in->linesize[0]);
uint16_t *inbp = (uint16_t *)(in->data[1] + y * in->linesize[1]);
uint16_t *inap = (uint16_t *)(in->data[3] + y * in->linesize[3]);
uint16_t *outrp = (uint16_t *)(out->data[2] + y * out->linesize[2]);
uint16_t *outgp = (uint16_t *)(out->data[0] + y * out->linesize[0]);
uint16_t *outbp = (uint16_t *)(out->data[1] + y * out->linesize[1]);
uint16_t *outap = (uint16_t *)(out->data[3] + y * out->linesize[3]);
for (int x = 0; x < in->width; x++) {
outrp[x] = s->lut[0][inrp[x]];
outgp[x] = s->lut[1][ingp[x]];
outbp[x] = s->lut[2][inbp[x]];
if (s->num_components == 4)
outap[x] = inap[x];
}
}
}

// This function is the main guts of the filter. Normalizes the input frame
// into the output frame. The frames are known to have the same dimensions
// and pixel format.
@@ -269,9 +347,9 @@ static void normalize(NormalizeContext *s, AVFrame *in, AVFrame *out)
// Calculate the output range [min.out,max.out] as a ratio of the full-
// strength output range [blackpt,whitept] and the original input range
// [min.in,max.in], based on the user-specified filter strength.
min[c].out = (s->blackpt[c] * s->strength)
min[c].out = (s->sblackpt[c] * s->strength)
+ (min[c].in * (1.0f - s->strength));
max[c].out = (s->whitept[c] * s->strength)
max[c].out = (s->swhitept[c] * s->strength)
+ (max[c].in * (1.0f - s->strength));

// Now, build a lookup table which linearly maps the adjusted input range
@@ -291,8 +369,7 @@ static void normalize(NormalizeContext *s, AVFrame *in, AVFrame *out)
float scale = (max[c].out - min[c].out) / (max[c].smoothed - min[c].smoothed);
for (in_val = min[c].in; in_val <= max[c].in; in_val++) {
int out_val = (in_val - min[c].smoothed) * scale + min[c].out + 0.5f;
out_val = FFMAX(out_val, 0);
out_val = FFMIN(out_val, 255);
out_val = av_clip_uintp2_c(out_val, s->depth);
s->lut[c][in_val] = out_val;
}
}
@@ -324,8 +401,11 @@ static int query_formats(AVFilterContext *ctx)
AV_PIX_FMT_RGB0,
AV_PIX_FMT_0BGR,
AV_PIX_FMT_BGR0,
AV_PIX_FMT_GBRAP,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_NONE
};
// According to filter_design.txt, using ff_set_common_formats() this way
@@ -345,11 +425,13 @@ static int config_input(AVFilterLink *inlink)
NormalizeContext *s = inlink->dst->priv;
// Store offsets to R,G,B,A bytes respectively in each pixel
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int c, planar;
int c, planar, scale;

ff_fill_rgba_map(s->co, inlink->format);
s->depth = desc->comp[0].depth;
scale = 1 << (s->depth - 8);
s->num_components = desc->nb_components;
s->step = av_get_padded_bits_per_pixel(desc) >> 3;
s->step = av_get_padded_bits_per_pixel(desc) >> (3 + (s->depth > 8));
// Convert smoothing value to history_len (a count of frames to average,
// must be at least 1). Currently this is a direct assignment, but the
// smoothing value was originally envisaged as a number of seconds. In
@@ -359,19 +441,26 @@ static int config_input(AVFilterLink *inlink)
// Allocate the history buffers -- there are 6 -- one for each extrema.
// s->smoothing is limited to INT_MAX/8, so that (s->history_len * 6)
// can't overflow on 32bit causing a too-small allocation.
s->history_mem = av_malloc(s->history_len * 6);
s->history_mem = av_malloc(s->history_len * 6 * sizeof(*s->history_mem));
if (s->history_mem == NULL)
return AVERROR(ENOMEM);

for (c = 0; c < 3; c++) {
s->min[c].history = s->history_mem + (c*2) * s->history_len;
s->max[c].history = s->history_mem + (c*2+1) * s->history_len;
s->sblackpt[c] = scale * s->blackpt[c] + (s->blackpt[c] >> (s->depth - 8));
s->swhitept[c] = scale * s->whitept[c] + (s->whitept[c] >> (s->depth - 8));
}

planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;

s->find_min_max = planar ? find_min_max_planar : find_min_max;
s->process = planar? process_planar : process;
if (s->depth <= 8) {
s->find_min_max = planar ? find_min_max_planar : find_min_max;
s->process = planar? process_planar : process;
} else {
s->find_min_max = planar ? find_min_max_planar_16 : find_min_max_16;
s->process = planar? process_planar_16 : process_16;
}

return 0;
}


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