/*
* Copyright (c) 2011 Roger Pau Monné <roger.pau@entel.upc.edu>
* Copyright (c) 2011 Stefano Sabatini
* Copyright (c) 2013 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Caculate the PSNR between two input videos.
*/
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "dualinput.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct PSNRContext {
const AVClass *class;
FFDualInputContext dinput;
double mse, min_mse, max_mse;
uint64_t nb_frames;
FILE *stats_file;
char *stats_file_str;
int max[4], average_max;
int is_rgb;
uint8_t rgba_map[4];
char comps[4];
int nb_components;
int planewidth[4];
int planeheight[4];
void (*compute_mse)(struct PSNRContext *s,
const uint8_t *m[4], const int ml[4],
const uint8_t *r[4], const int rl[4],
int w, int h, double mse[4]);
} PSNRContext;
#define OFFSET(x) offsetof(PSNRContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption psnr_options[] = {
{"stats_file", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{"f", "Set file where to store per-frame difference information", OFFSET(stats_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(psnr);
static inline unsigned pow2(unsigned base)
{
return base*base;
}
static inline double get_psnr(double mse, uint64_t nb_frames, int max)
{
return 10.0 * log(pow2(max) / (mse / nb_frames)) / log(10.0);
}
static inline
void compute_images_mse(PSNRContext *s,
const uint8_t *main_data[4], const int main_linesizes[4],
const uint8_t *ref_data[4], const int ref_linesizes[4],
int w, int h, double mse[4])
{
int i, c, j;
for (c = 0; c < s->nb_components; c++) {
const int outw = s->planewidth[c];
const int outh = s->planeheight[c];
const uint8_t *main_line = main_data[c];
const uint8_t *ref_line = ref_data[c];
const int ref_linesize = ref_linesizes[c];
const int main_linesize = main_linesizes[c];
uint64_t m = 0;
for (i = 0; i < outh; i++) {
int m2 = 0;
for (j = 0; j < outw; j++)
m2 += pow2(main_line[j] - ref_line[j]);
m += m2;
ref_line += ref_linesize;
main_line += main_linesize;
}
mse[c] = m / (double)(outw * outh);
}
}
static inline
void compute_images_mse_16bit(PSNRContext *s,
const uint8_t *main_data[4], const int main_linesizes[4],
const uint8_t *ref_data[4], const int ref_linesizes[4],
int w, int h, double mse[4])
{
int i, c, j;
for (c = 0; c < s->nb_components; c++) {
const int outw = s->planewidth[c];
const int outh = s->planeheight[c];
const uint16_t *main_line = (uint16_t *)main_data[c];
const uint16_t *ref_line = (uint16_t *)ref_data[c];
const int ref_linesize = ref_linesizes[c] / 2;
const int main_linesize = main_linesizes[c] / 2;
uint64_t m = 0;
for (i = 0; i < outh; i++) {
for (j = 0; j < outw; j++)
m += pow2(main_line[j] - ref_line[j]);
ref_line += ref_linesize;
main_line += main_linesize;
}
mse[c] = m / (double)(outw * outh);
}
}
static void set_meta(AVDictionary **metadata, const char *key, char comp, float d)
{
char value[128];
snprintf(value, sizeof(value), "%0.2f", d);
if (comp) {
char key2[128];
snprintf(key2, sizeof(key2), "%s%c", key, comp);
av_dict_set(metadata, key2, value, 0);
} else {
av_dict_set(metadata, key, value, 0);
}
}
static AVFrame *do_psnr(AVFilterContext *ctx, AVFrame *main,
const AVFrame *ref)
{
PSNRContext *s = ctx->priv;
double comp_mse[4], mse = 0;
int j, c;
AVDictionary **metadata = avpriv_frame_get_metadatap(main);
s->compute_mse(s, (const uint8_t **)main->data, main->linesize,
(const uint8_t **)ref->data, ref->linesize,
main->width, main->height, comp_mse);
for (j = 0; j < s->nb_components; j++)
mse += comp_mse[j];
mse /= s->nb_components;
s->min_mse = FFMIN(s->min_mse, mse);
s->max_mse = FFMAX(s->max_mse, mse);
s->mse += mse;
s->nb_frames++;
for (j = 0; j < s->nb_components; j++) {
c = s->is_rgb ? s->rgba_map[j] : j;
set_meta(metadata, "lavfi.psnr.mse.", s->comps[j], comp_mse[c]);
set_meta(metadata, "lavfi.psnr.mse_avg", 0, mse);
set_meta(metadata, "lavfi.psnr.psnr.", s->comps[j], get_psnr(comp_mse[c], 1, s->max[c]));
set_meta(metadata, "lavfi.psnr.psnr_avg", 0, get_psnr(mse, 1, s->average_max));
}
if (s->stats_file) {
fprintf(s->stats_file, "n:%"PRId64" mse_avg:%0.2f ", s->nb_frames, mse);
for (j = 0; j < s->nb_components; j++) {
c = s->is_rgb ? s->rgba_map[j] : j;
fprintf(s->stats_file, "mse_%c:%0.2f ", s->comps[j], comp_mse[c]);
}
for (j = 0; j < s->nb_components; j++) {
c = s->is_rgb ? s->rgba_map[j] : j;
fprintf(s->stats_file, "psnr_%c:%0.2f ", s->comps[j],
get_psnr(comp_mse[c], 1, s->max[c]));
}
fprintf(s->stats_file, "\n");
}
return main;
}
static av_cold int init(AVFilterContext *ctx)
{
PSNRContext *s = ctx->priv;
s->min_mse = +INFINITY;
s->max_mse = -INFINITY;
if (s->stats_file_str) {
s->stats_file = fopen(s->stats_file_str, "w");
if (!s->stats_file) {
int err = AVERROR(errno);
char buf[128];
av_strerror(err, buf, sizeof(buf));
av_log(ctx, AV_LOG_ERROR, "Could not open stats file %s: %s\n",
s->stats_file_str, buf);
return err;
}
}
s->dinput.process = do_psnr;
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf
#define PF_ALPHA(suf) AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf
#define PF(suf) PF_NOALPHA(suf), PF_ALPHA(suf)
PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16),
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
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_GBRAP16,
AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static int config_input_ref(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AVFilterContext *ctx = inlink->dst;
PSNRContext *s = ctx->priv;
int j;
s->nb_components = desc->nb_components;
if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
ctx->inputs[0]->h != ctx->inputs[1]->h) {
av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
return AVERROR(EINVAL);
}
if (ctx->inputs[0]->format != ctx->inputs[1]->format) {
av_log(ctx, AV_LOG_ERROR, "Inputs must be of same pixel format.\n");
return AVERROR(EINVAL);
}
switch (inlink->format) {
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_GRAY16:
case AV_PIX_FMT_GBRP:
case AV_PIX_FMT_GBRP9:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRP12:
case AV_PIX_FMT_GBRP14:
case AV_PIX_FMT_GBRP16:
case AV_PIX_FMT_GBRAP:
case AV_PIX_FMT_GBRAP16:
case AV_PIX_FMT_YUVJ411P:
case AV_PIX_FMT_YUVJ420P:
case AV_PIX_FMT_YUVJ422P:
case AV_PIX_FMT_YUVJ440P:
case AV_PIX_FMT_YUVJ444P:
s->max[0] = (1 << (desc->comp[0].depth_minus1 + 1)) - 1;
s->max[1] = (1 << (desc->comp[1].depth_minus1 + 1)) - 1;
s->max[2] = (1 << (desc->comp[2].depth_minus1 + 1)) - 1;
s->max[3] = (1 << (desc->comp[3].depth_minus1 + 1)) - 1;
break;
default:
s->max[0] = 235 * (1 << (desc->comp[0].depth_minus1 - 7));
s->max[1] = 240 * (1 << (desc->comp[1].depth_minus1 - 7));
s->max[2] = 240 * (1 << (desc->comp[2].depth_minus1 - 7));
s->max[3] = (1 << (desc->comp[3].depth_minus1 + 1)) - 1;
}
s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
s->comps[0] = s->is_rgb ? 'r' : 'y' ;
s->comps[1] = s->is_rgb ? 'g' : 'u' ;
s->comps[2] = s->is_rgb ? 'b' : 'v' ;
s->comps[3] = 'a';
for (j = 0; j < s->nb_components; j++)
s->average_max += s->max[j];
s->average_max /= s->nb_components;
s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->compute_mse = desc->comp[0].depth_minus1 > 7 ? compute_images_mse_16bit : compute_images_mse;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
PSNRContext *s = ctx->priv;
AVFilterLink *mainlink = ctx->inputs[0];
int ret;
outlink->w = mainlink->w;
outlink->h = mainlink->h;
outlink->time_base = mainlink->time_base;
outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
outlink->frame_rate = mainlink->frame_rate;
if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
return ret;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
{
PSNRContext *s = inlink->dst->priv;
return ff_dualinput_filter_frame(&s->dinput, inlink, inpicref);
}
static int request_frame(AVFilterLink *outlink)
{
PSNRContext *s = outlink->src->priv;
return ff_dualinput_request_frame(&s->dinput, outlink);
}
static av_cold void uninit(AVFilterContext *ctx)
{
PSNRContext *s = ctx->priv;
if (s->nb_frames > 0) {
av_log(ctx, AV_LOG_INFO, "PSNR average:%0.2f min:%0.2f max:%0.2f\n",
get_psnr(s->mse, s->nb_frames, s->average_max),
get_psnr(s->max_mse, 1, s->average_max),
get_psnr(s->min_mse, 1, s->average_max));
}
ff_dualinput_uninit(&s->dinput);
if (s->stats_file)
fclose(s->stats_file);
}
static const AVFilterPad psnr_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},{
.name = "reference",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input_ref,
},
{ NULL }
};
static const AVFilterPad psnr_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter ff_vf_psnr = {
.name = "psnr",
.description = NULL_IF_CONFIG_SMALL("Calculate the PSNR between two video streams."),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(PSNRContext),
.priv_class = &psnr_class,
.inputs = psnr_inputs,
.outputs = psnr_outputs,
};