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+/*
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+ * Copyright (c) 2017 Ronald S. Bultje <rsbultje@gmail.com>
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+ * Copyright (c) 2017 Ashish Pratap Singh <ashk43712@gmail.com>
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+/**
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+ * @file
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+ * Calculate the VMAF between two input videos.
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+ */
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+
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+#include <inttypes.h>
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+#include <pthread.h>
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+#include <libvmaf.h>
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+#include "libavutil/avstring.h"
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+#include "libavutil/opt.h"
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+#include "libavutil/pixdesc.h"
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+#include "avfilter.h"
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+#include "dualinput.h"
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+#include "drawutils.h"
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+#include "formats.h"
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+#include "internal.h"
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+#include "video.h"
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+
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+typedef struct LIBVMAFContext {
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+ const AVClass *class;
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+ FFDualInputContext dinput;
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+ const AVPixFmtDescriptor *desc;
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+ char *format;
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+ int width;
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+ int height;
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+ double vmaf_score;
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+ pthread_t vmaf_thread;
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+ pthread_mutex_t lock;
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+ pthread_cond_t cond;
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+ int eof;
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+ AVFrame *gmain;
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+ AVFrame *gref;
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+ int frame_set;
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+ char *model_path;
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+ char *log_path;
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+ char *log_fmt;
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+ int disable_clip;
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+ int disable_avx;
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+ int enable_transform;
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+ int phone_model;
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+ int psnr;
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+ int ssim;
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+ int ms_ssim;
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+ char *pool;
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+} LIBVMAFContext;
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+
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+#define OFFSET(x) offsetof(LIBVMAFContext, x)
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+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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+
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+static const AVOption libvmaf_options[] = {
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+ {"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},
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+ {"log_path", "Set the file path to be used to store logs.", OFFSET(log_path), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
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+ {"log_fmt", "Set the format of the log (xml or json).", OFFSET(log_fmt), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
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+ {"enable_transform", "Enables transform for computing vmaf.", OFFSET(enable_transform), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
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+ {"phone_model", "Invokes the phone model that will generate higher VMAF scores.", OFFSET(phone_model), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
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+ {"psnr", "Enables computing psnr along with vmaf.", OFFSET(psnr), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
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+ {"ssim", "Enables computing ssim along with vmaf.", OFFSET(ssim), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
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+ {"ms_ssim", "Enables computing ms-ssim along with vmaf.", OFFSET(ms_ssim), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
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+ {"pool", "Set the pool method to be used for computing vmaf.", OFFSET(pool), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 1, FLAGS},
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+ { NULL }
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+};
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+
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+AVFILTER_DEFINE_CLASS(libvmaf);
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+
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+#define read_frame_fn(type, bits) \
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+ static int read_frame_##bits##bit(float *ref_data, float *main_data, \
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+ float *temp_data, int stride, \
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+ double *score, void *ctx) \
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+{ \
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+ LIBVMAFContext *s = (LIBVMAFContext *) ctx; \
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+ int ret; \
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+ \
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+ pthread_mutex_lock(&s->lock); \
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+ \
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+ while (!s->frame_set && !s->eof) { \
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+ pthread_cond_wait(&s->cond, &s->lock); \
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+ } \
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+ \
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+ if (s->frame_set) { \
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+ int ref_stride = s->gref->linesize[0]; \
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+ int main_stride = s->gmain->linesize[0]; \
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+ \
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+ const type *ref_ptr = (const type *) s->gref->data[0]; \
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+ const type *main_ptr = (const type *) s->gmain->data[0]; \
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+ \
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+ float *ptr = ref_data; \
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+ \
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+ int h = s->height; \
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+ int w = s->width; \
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+ \
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+ int i,j; \
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+ \
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+ for (i = 0; i < h; i++) { \
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+ for ( j = 0; j < w; j++) { \
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+ ptr[j] = (float)ref_ptr[j]; \
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+ } \
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+ ref_ptr += ref_stride / sizeof(*ref_ptr); \
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+ ptr += stride / sizeof(*ptr); \
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+ } \
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+ \
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+ ptr = main_data; \
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+ \
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+ for (i = 0; i < h; i++) { \
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+ for (j = 0; j < w; j++) { \
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+ ptr[j] = (float)main_ptr[j]; \
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+ } \
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+ main_ptr += main_stride / sizeof(*main_ptr); \
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+ ptr += stride / sizeof(*ptr); \
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+ } \
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+ } \
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+ \
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+ ret = !s->frame_set; \
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+ \
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+ s->frame_set = 0; \
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+ \
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+ pthread_cond_signal(&s->cond); \
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+ pthread_mutex_unlock(&s->lock); \
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+ \
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+ if (ret) { \
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+ return 2; \
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+ } \
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+ \
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+ return 0; \
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+}
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+
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+read_frame_fn(uint8_t, 8);
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+read_frame_fn(uint16_t, 10);
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+
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+static void compute_vmaf_score(LIBVMAFContext *s)
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+{
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+ int (*read_frame)(float *ref_data, float *main_data, float *temp_data,
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+ int stride, double *score, void *ctx);
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+
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+ if (s->desc->comp[0].depth <= 8) {
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+ read_frame = read_frame_8bit;
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+ } else {
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+ read_frame = read_frame_10bit;
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+ }
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+
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+ s->vmaf_score = compute_vmaf(s->format, s->width, s->height, read_frame, s,
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+ s->model_path, s->log_path, s->log_fmt, 0, 0,
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+ s->enable_transform, s->phone_model, s->psnr,
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+ s->ssim, s->ms_ssim, s->pool);
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+}
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+
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+static void *call_vmaf(void *ctx)
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+{
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+ LIBVMAFContext *s = (LIBVMAFContext *) ctx;
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+ compute_vmaf_score(s);
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+ av_log(ctx, AV_LOG_INFO, "VMAF score: %f\n",s->vmaf_score);
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+ pthread_exit(NULL);
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+}
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+
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+static AVFrame *do_vmaf(AVFilterContext *ctx, AVFrame *main, const AVFrame *ref)
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+{
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+ LIBVMAFContext *s = ctx->priv;
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+
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+ pthread_mutex_lock(&s->lock);
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+
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+ while (s->frame_set != 0) {
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+ pthread_cond_wait(&s->cond, &s->lock);
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+ }
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+
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+ av_frame_ref(s->gref, ref);
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+ av_frame_ref(s->gmain, main);
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+
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+ s->frame_set = 1;
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+
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+ pthread_cond_signal(&s->cond);
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+ pthread_mutex_unlock(&s->lock);
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+
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+ return main;
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+}
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+
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+static av_cold int init(AVFilterContext *ctx)
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+{
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+ LIBVMAFContext *s = ctx->priv;
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+
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+ s->gref = av_frame_alloc();
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+ s->gmain = av_frame_alloc();
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+
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+ pthread_mutex_init(&s->lock, NULL);
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+ pthread_cond_init (&s->cond, NULL);
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+
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+ s->dinput.process = do_vmaf;
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+ return 0;
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+}
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+
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+static int query_formats(AVFilterContext *ctx)
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+{
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+ static const enum AVPixelFormat pix_fmts[] = {
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+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
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+ AV_PIX_FMT_YUV444P10LE, AV_PIX_FMT_YUV422P10LE, AV_PIX_FMT_YUV420P10LE,
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+ AV_PIX_FMT_NONE
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+ };
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+
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+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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+ if (!fmts_list)
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+ return AVERROR(ENOMEM);
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+ return ff_set_common_formats(ctx, fmts_list);
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+}
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+
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+
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+static int config_input_ref(AVFilterLink *inlink)
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+{
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+ AVFilterContext *ctx = inlink->dst;
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+ LIBVMAFContext *s = ctx->priv;
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+ int th;
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+
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+ if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
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+ ctx->inputs[0]->h != ctx->inputs[1]->h) {
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+ av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
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+ return AVERROR(EINVAL);
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+ }
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+ if (ctx->inputs[0]->format != ctx->inputs[1]->format) {
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+ av_log(ctx, AV_LOG_ERROR, "Inputs must be of same pixel format.\n");
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+ return AVERROR(EINVAL);
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+ }
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+
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+ s->desc = av_pix_fmt_desc_get(inlink->format);
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+ s->width = ctx->inputs[0]->w;
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+ s->height = ctx->inputs[0]->h;
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+
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+ th = pthread_create(&s->vmaf_thread, NULL, call_vmaf, (void *) s);
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+ if (th) {
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+ av_log(ctx, AV_LOG_ERROR, "Thread creation failed.\n");
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+ return AVERROR(EINVAL);
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+ }
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+
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+ return 0;
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+}
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+
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+
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+static int config_output(AVFilterLink *outlink)
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+{
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+ AVFilterContext *ctx = outlink->src;
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+ LIBVMAFContext *s = ctx->priv;
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+ AVFilterLink *mainlink = ctx->inputs[0];
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+ int ret;
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+
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+ outlink->w = mainlink->w;
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+ outlink->h = mainlink->h;
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+ outlink->time_base = mainlink->time_base;
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+ outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
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+ outlink->frame_rate = mainlink->frame_rate;
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+ if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
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+ return ret;
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+
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+ return 0;
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+}
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+
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+static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
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+{
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+ LIBVMAFContext *s = inlink->dst->priv;
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+ return ff_dualinput_filter_frame(&s->dinput, inlink, inpicref);
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+}
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+
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+static int request_frame(AVFilterLink *outlink)
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+{
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+ LIBVMAFContext *s = outlink->src->priv;
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+ return ff_dualinput_request_frame(&s->dinput, outlink);
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+}
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+
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+static av_cold void uninit(AVFilterContext *ctx)
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+{
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+ LIBVMAFContext *s = ctx->priv;
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+
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+ ff_dualinput_uninit(&s->dinput);
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+
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+ pthread_mutex_lock(&s->lock);
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+ s->eof = 1;
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+ pthread_cond_signal(&s->cond);
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+ pthread_mutex_unlock(&s->lock);
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+
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+ pthread_join(s->vmaf_thread, NULL);
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+
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+ av_frame_free(&s->gref);
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+ av_frame_free(&s->gmain);
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+
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+ pthread_mutex_destroy(&s->lock);
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+ pthread_cond_destroy(&s->cond);
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+}
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+
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+static const AVFilterPad libvmaf_inputs[] = {
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+ {
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+ .name = "main",
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+ .type = AVMEDIA_TYPE_VIDEO,
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+ .filter_frame = filter_frame,
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+ },{
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+ .name = "reference",
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+ .type = AVMEDIA_TYPE_VIDEO,
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+ .filter_frame = filter_frame,
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+ .config_props = config_input_ref,
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+ },
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+ { NULL }
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+};
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+
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+static const AVFilterPad libvmaf_outputs[] = {
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+ {
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+ .name = "default",
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+ .type = AVMEDIA_TYPE_VIDEO,
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+ .config_props = config_output,
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+ .request_frame = request_frame,
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+ },
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+ { NULL }
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+};
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+
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+AVFilter ff_vf_libvmaf = {
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+ .name = "libvmaf",
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+ .description = NULL_IF_CONFIG_SMALL("Calculate the VMAF between two video streams."),
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+ .init = init,
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+ .uninit = uninit,
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+ .query_formats = query_formats,
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+ .priv_size = sizeof(LIBVMAFContext),
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+ .priv_class = &libvmaf_class,
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+ .inputs = libvmaf_inputs,
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+ .outputs = libvmaf_outputs,
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+};
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