/*
* Copyright (c) 2017 Ronald S. Bultje <rsbultje@gmail.com>
* Copyright (c) 2017 Ashish Pratap Singh <ashk43712@gmail.com>
*
* 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
* Calculate the VMAF between two input videos.
*/
#include <pthread.h>
#include <libvmaf.h>
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
typedef struct LIBVMAFContext {
const AVClass *class;
FFFrameSync fs;
const AVPixFmtDescriptor *desc;
int width;
int height;
double vmaf_score;
pthread_t vmaf_thread;
pthread_mutex_t lock;
pthread_cond_t cond;
int eof;
AVFrame *gmain;
AVFrame *gref;
int frame_set;
char *model_path;
char *log_path;
char *log_fmt;
int disable_clip;
int disable_avx;
int enable_transform;
int phone_model;
int psnr;
int ssim;
int ms_ssim;
char *pool;
} LIBVMAFContext;
#define OFFSET(x) offsetof(LIBVMAFContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption libvmaf_options[] = {
{"model_path", "Set the model to be used for computing vmaf.", OFFSET(model_path), AV_OPT_TYPE_STRING, {.str="/usr/local/share/model/vmaf_v0.6.1.pkl"}, 0, 1, FLAGS},
{"log_path", "Set the file path to be used to store logs.", OFFSET(log_path), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
{"log_fmt", "Set the format of the log (xml or json).", OFFSET(log_fmt), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
{"enable_transform", "Enables transform for computing vmaf.", OFFSET(enable_transform), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"phone_model", "Invokes the phone model that will generate higher VMAF scores.", OFFSET(phone_model), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"psnr", "Enables computing psnr along with vmaf.", OFFSET(psnr), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"ssim", "Enables computing ssim along with vmaf.", OFFSET(ssim), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"ms_ssim", "Enables computing ms-ssim along with vmaf.", OFFSET(ms_ssim), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{"pool", "Set the pool method to be used for computing vmaf.", OFFSET(pool), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
{ NULL }
};
FRAMESYNC_DEFINE_CLASS(libvmaf, LIBVMAFContext, fs);
#define read_frame_fn(type, bits) \
static int read_frame_##bits##bit(float *ref_data, float *main_data, \
float *temp_data, int stride, void *ctx) \
{ \
LIBVMAFContext *s = (LIBVMAFContext *) ctx; \
int ret; \
\
pthread_mutex_lock(&s->lock); \
\
while (!s->frame_set && !s->eof) { \
pthread_cond_wait(&s->cond, &s->lock); \
} \
\
if (s->frame_set) { \
int ref_stride = s->gref->linesize[0]; \
int main_stride = s->gmain->linesize[0]; \
\
const type *ref_ptr = (const type *) s->gref->data[0]; \
const type *main_ptr = (const type *) s->gmain->data[0]; \
\
float *ptr = ref_data; \
\
int h = s->height; \
int w = s->width; \
\
int i,j; \
\
for (i = 0; i < h; i++) { \
for ( j = 0; j < w; j++) { \
ptr[j] = (float)ref_ptr[j]; \
} \
ref_ptr += ref_stride / sizeof(*ref_ptr); \
ptr += stride / sizeof(*ptr); \
} \
\
ptr = main_data; \
\
for (i = 0; i < h; i++) { \
for (j = 0; j < w; j++) { \
ptr[j] = (float)main_ptr[j]; \
} \
main_ptr += main_stride / sizeof(*main_ptr); \
ptr += stride / sizeof(*ptr); \
} \
} \
\
ret = !s->frame_set; \
\
s->frame_set = 0; \
\
pthread_cond_signal(&s->cond); \
pthread_mutex_unlock(&s->lock); \
\
if (ret) { \
return 2; \
} \
\
return 0; \
}
read_frame_fn(uint8_t, 8);
read_frame_fn(uint16_t, 10);
static void compute_vmaf_score(LIBVMAFContext *s)
{
int (*read_frame)(float *ref_data, float *main_data, float *temp_data,
int stride, void *ctx);
char *format;
if (s->desc->comp[0].depth <= 8) {
read_frame = read_frame_8bit;
} else {
read_frame = read_frame_10bit;
}
format = (char *) s->desc->name;
s->vmaf_score = compute_vmaf(format, s->width, s->height, read_frame, s,
s->model_path, s->log_path, s->log_fmt, 0, 0,
s->enable_transform, s->phone_model, s->psnr,
s->ssim, s->ms_ssim, s->pool);
}
static void *call_vmaf(void *ctx)
{
LIBVMAFContext *s = (LIBVMAFContext *) ctx;
compute_vmaf_score(s);
av_log(ctx, AV_LOG_INFO, "VMAF score: %f\n",s->vmaf_score);
pthread_exit(NULL);
}
static int do_vmaf(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
LIBVMAFContext *s = ctx->priv;
AVFrame *main, *ref;
int ret;
ret = ff_framesync_dualinput_get(fs, &main, &ref);
if (ret < 0)
return ret;
if (!ref)
return ff_filter_frame(ctx->outputs[0], main);
pthread_mutex_lock(&s->lock);
while (s->frame_set != 0) {
pthread_cond_wait(&s->cond, &s->lock);
}
av_frame_ref(s->gref, ref);
av_frame_ref(s->gmain, main);
s->frame_set = 1;
pthread_cond_signal(&s->cond);
pthread_mutex_unlock(&s->lock);
return ff_filter_frame(ctx->outputs[0], main);
}
static av_cold int init(AVFilterContext *ctx)
{
LIBVMAFContext *s = ctx->priv;
s->gref = av_frame_alloc();
s->gmain = av_frame_alloc();
pthread_mutex_init(&s->lock, NULL);
pthread_cond_init (&s->cond, NULL);
s->fs.on_event = do_vmaf;
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV444P10LE, AV_PIX_FMT_YUV422P10LE, AV_PIX_FMT_YUV420P10LE,
AV_PIX_FMT_NONE
};
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, fmts_list);
}
static int config_input_ref(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
LIBVMAFContext *s = ctx->priv;
int th;
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);
}
s->desc = av_pix_fmt_desc_get(inlink->format);
s->width = ctx->inputs[0]->w;
s->height = ctx->inputs[0]->h;
th = pthread_create(&s->vmaf_thread, NULL, call_vmaf, (void *) s);
if (th) {
av_log(ctx, AV_LOG_ERROR, "Thread creation failed.\n");
return AVERROR(EINVAL);
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LIBVMAFContext *s = ctx->priv;
AVFilterLink *mainlink = ctx->inputs[0];
int ret;
ret = ff_framesync_init_dualinput(&s->fs, ctx);
if (ret < 0)
return 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_framesync_configure(&s->fs)) < 0)
return ret;
return 0;
}
static int activate(AVFilterContext *ctx)
{
LIBVMAFContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold void uninit(AVFilterContext *ctx)
{
LIBVMAFContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
pthread_mutex_lock(&s->lock);
s->eof = 1;
pthread_cond_signal(&s->cond);
pthread_mutex_unlock(&s->lock);
pthread_join(s->vmaf_thread, NULL);
av_frame_free(&s->gref);
av_frame_free(&s->gmain);
pthread_mutex_destroy(&s->lock);
pthread_cond_destroy(&s->cond);
}
static const AVFilterPad libvmaf_inputs[] = {
{
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
},{
.name = "reference",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input_ref,
},
{ NULL }
};
static const AVFilterPad libvmaf_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_libvmaf = {
.name = "libvmaf",
.description = NULL_IF_CONFIG_SMALL("Calculate the VMAF between two video streams."),
.preinit = libvmaf_framesync_preinit,
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.priv_size = sizeof(LIBVMAFContext),
.priv_class = &libvmaf_class,
.inputs = libvmaf_inputs,
.outputs = libvmaf_outputs,
};