| /* |
| * Copyright (c) 2003-2013 Loren Merritt |
| * Copyright (c) 2015 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 |
| */ |
| |
| /* Computes the Structural Similarity Metric between two video streams. |
| * original algorithm: |
| * Z. Wang, A. C. Bovik, H. R. Sheikh and E. P. Simoncelli, |
| * "Image quality assessment: From error visibility to structural similarity," |
| * IEEE Transactions on Image Processing, vol. 13, no. 4, pp. 600-612, Apr. 2004. |
| * |
| * To improve speed, this implementation uses the standard approximation of |
| * overlapped 8x8 block sums, rather than the original gaussian weights. |
| */ |
| |
| /* |
| * @file |
| * Caculate the SSIM between two input videos. |
| */ |
| |
| #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 "ssim.h" |
| #include "video.h" |
| |
| typedef struct SSIMContext { |
| const AVClass *class; |
| FFFrameSync fs; |
| FILE *stats_file; |
| char *stats_file_str; |
| int nb_components; |
| int nb_threads; |
| int max; |
| uint64_t nb_frames; |
| double ssim[4], ssim_total; |
| char comps[4]; |
| double coefs[4]; |
| uint8_t rgba_map[4]; |
| int planewidth[4]; |
| int planeheight[4]; |
| int **temp; |
| int is_rgb; |
| double **score; |
| int (*ssim_plane)(AVFilterContext *ctx, void *arg, |
| int jobnr, int nb_jobs); |
| SSIMDSPContext dsp; |
| } SSIMContext; |
| |
| #define OFFSET(x) offsetof(SSIMContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| |
| static const AVOption ssim_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 } |
| }; |
| |
| FRAMESYNC_DEFINE_CLASS(ssim, SSIMContext, fs); |
| |
| static void set_meta(AVDictionary **metadata, const char *key, char comp, float d) |
| { |
| char value[128]; |
| snprintf(value, sizeof(value), "%f", 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 void ssim_4x4xn_16bit(const uint8_t *main8, ptrdiff_t main_stride, |
| const uint8_t *ref8, ptrdiff_t ref_stride, |
| int64_t (*sums)[4], int width) |
| { |
| const uint16_t *main16 = (const uint16_t *)main8; |
| const uint16_t *ref16 = (const uint16_t *)ref8; |
| int x, y, z; |
| |
| main_stride >>= 1; |
| ref_stride >>= 1; |
| |
| for (z = 0; z < width; z++) { |
| uint64_t s1 = 0, s2 = 0, ss = 0, s12 = 0; |
| |
| for (y = 0; y < 4; y++) { |
| for (x = 0; x < 4; x++) { |
| unsigned a = main16[x + y * main_stride]; |
| unsigned b = ref16[x + y * ref_stride]; |
| |
| s1 += a; |
| s2 += b; |
| ss += a*a; |
| ss += b*b; |
| s12 += a*b; |
| } |
| } |
| |
| sums[z][0] = s1; |
| sums[z][1] = s2; |
| sums[z][2] = ss; |
| sums[z][3] = s12; |
| main16 += 4; |
| ref16 += 4; |
| } |
| } |
| |
| static void ssim_4x4xn_8bit(const uint8_t *main, ptrdiff_t main_stride, |
| const uint8_t *ref, ptrdiff_t ref_stride, |
| int (*sums)[4], int width) |
| { |
| int x, y, z; |
| |
| for (z = 0; z < width; z++) { |
| uint32_t s1 = 0, s2 = 0, ss = 0, s12 = 0; |
| |
| for (y = 0; y < 4; y++) { |
| for (x = 0; x < 4; x++) { |
| int a = main[x + y * main_stride]; |
| int b = ref[x + y * ref_stride]; |
| |
| s1 += a; |
| s2 += b; |
| ss += a*a; |
| ss += b*b; |
| s12 += a*b; |
| } |
| } |
| |
| sums[z][0] = s1; |
| sums[z][1] = s2; |
| sums[z][2] = ss; |
| sums[z][3] = s12; |
| main += 4; |
| ref += 4; |
| } |
| } |
| |
| static float ssim_end1x(int64_t s1, int64_t s2, int64_t ss, int64_t s12, int max) |
| { |
| int64_t ssim_c1 = (int64_t)(.01*.01*max*max*64 + .5); |
| int64_t ssim_c2 = (int64_t)(.03*.03*max*max*64*63 + .5); |
| |
| int64_t fs1 = s1; |
| int64_t fs2 = s2; |
| int64_t fss = ss; |
| int64_t fs12 = s12; |
| int64_t vars = fss * 64 - fs1 * fs1 - fs2 * fs2; |
| int64_t covar = fs12 * 64 - fs1 * fs2; |
| |
| return (float)(2 * fs1 * fs2 + ssim_c1) * (float)(2 * covar + ssim_c2) |
| / ((float)(fs1 * fs1 + fs2 * fs2 + ssim_c1) * (float)(vars + ssim_c2)); |
| } |
| |
| static float ssim_end1(int s1, int s2, int ss, int s12) |
| { |
| static const int ssim_c1 = (int)(.01*.01*255*255*64 + .5); |
| static const int ssim_c2 = (int)(.03*.03*255*255*64*63 + .5); |
| |
| int fs1 = s1; |
| int fs2 = s2; |
| int fss = ss; |
| int fs12 = s12; |
| int vars = fss * 64 - fs1 * fs1 - fs2 * fs2; |
| int covar = fs12 * 64 - fs1 * fs2; |
| |
| return (float)(2 * fs1 * fs2 + ssim_c1) * (float)(2 * covar + ssim_c2) |
| / ((float)(fs1 * fs1 + fs2 * fs2 + ssim_c1) * (float)(vars + ssim_c2)); |
| } |
| |
| static float ssim_endn_16bit(const int64_t (*sum0)[4], const int64_t (*sum1)[4], int width, int max) |
| { |
| float ssim = 0.0; |
| int i; |
| |
| for (i = 0; i < width; i++) |
| ssim += ssim_end1x(sum0[i][0] + sum0[i + 1][0] + sum1[i][0] + sum1[i + 1][0], |
| sum0[i][1] + sum0[i + 1][1] + sum1[i][1] + sum1[i + 1][1], |
| sum0[i][2] + sum0[i + 1][2] + sum1[i][2] + sum1[i + 1][2], |
| sum0[i][3] + sum0[i + 1][3] + sum1[i][3] + sum1[i + 1][3], |
| max); |
| return ssim; |
| } |
| |
| static double ssim_endn_8bit(const int (*sum0)[4], const int (*sum1)[4], int width) |
| { |
| double ssim = 0.0; |
| int i; |
| |
| for (i = 0; i < width; i++) |
| ssim += ssim_end1(sum0[i][0] + sum0[i + 1][0] + sum1[i][0] + sum1[i + 1][0], |
| sum0[i][1] + sum0[i + 1][1] + sum1[i][1] + sum1[i + 1][1], |
| sum0[i][2] + sum0[i + 1][2] + sum1[i][2] + sum1[i + 1][2], |
| sum0[i][3] + sum0[i + 1][3] + sum1[i][3] + sum1[i + 1][3]); |
| return ssim; |
| } |
| |
| #define SUM_LEN(w) (((w) >> 2) + 3) |
| |
| typedef struct ThreadData { |
| const uint8_t *main_data[4]; |
| const uint8_t *ref_data[4]; |
| int main_linesize[4]; |
| int ref_linesize[4]; |
| int planewidth[4]; |
| int planeheight[4]; |
| double **score; |
| int **temp; |
| int nb_components; |
| int max; |
| SSIMDSPContext *dsp; |
| } ThreadData; |
| |
| static int ssim_plane_16bit(AVFilterContext *ctx, void *arg, |
| int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| double *score = td->score[jobnr]; |
| void *temp = td->temp[jobnr]; |
| const int max = td->max; |
| |
| for (int c = 0; c < td->nb_components; c++) { |
| const uint8_t *main_data = td->main_data[c]; |
| const uint8_t *ref_data = td->ref_data[c]; |
| const int main_stride = td->main_linesize[c]; |
| const int ref_stride = td->ref_linesize[c]; |
| int width = td->planewidth[c]; |
| int height = td->planeheight[c]; |
| const int slice_start = ((height >> 2) * jobnr) / nb_jobs; |
| const int slice_end = ((height >> 2) * (jobnr+1)) / nb_jobs; |
| const int ystart = FFMAX(1, slice_start); |
| int z = ystart - 1; |
| double ssim = 0.0; |
| int64_t (*sum0)[4] = temp; |
| int64_t (*sum1)[4] = sum0 + SUM_LEN(width); |
| |
| width >>= 2; |
| height >>= 2; |
| |
| for (int y = ystart; y < slice_end; y++) { |
| for (; z <= y; z++) { |
| FFSWAP(void*, sum0, sum1); |
| ssim_4x4xn_16bit(&main_data[4 * z * main_stride], main_stride, |
| &ref_data[4 * z * ref_stride], ref_stride, |
| sum0, width); |
| } |
| |
| ssim += ssim_endn_16bit((const int64_t (*)[4])sum0, (const int64_t (*)[4])sum1, width - 1, max); |
| } |
| |
| score[c] = ssim; |
| } |
| |
| return 0; |
| } |
| |
| static int ssim_plane(AVFilterContext *ctx, void *arg, |
| int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| double *score = td->score[jobnr]; |
| void *temp = td->temp[jobnr]; |
| SSIMDSPContext *dsp = td->dsp; |
| |
| for (int c = 0; c < td->nb_components; c++) { |
| const uint8_t *main_data = td->main_data[c]; |
| const uint8_t *ref_data = td->ref_data[c]; |
| const int main_stride = td->main_linesize[c]; |
| const int ref_stride = td->ref_linesize[c]; |
| int width = td->planewidth[c]; |
| int height = td->planeheight[c]; |
| const int slice_start = ((height >> 2) * jobnr) / nb_jobs; |
| const int slice_end = ((height >> 2) * (jobnr+1)) / nb_jobs; |
| const int ystart = FFMAX(1, slice_start); |
| int z = ystart - 1; |
| double ssim = 0.0; |
| int (*sum0)[4] = temp; |
| int (*sum1)[4] = sum0 + SUM_LEN(width); |
| |
| width >>= 2; |
| height >>= 2; |
| |
| for (int y = ystart; y < slice_end; y++) { |
| for (; z <= y; z++) { |
| FFSWAP(void*, sum0, sum1); |
| dsp->ssim_4x4_line(&main_data[4 * z * main_stride], main_stride, |
| &ref_data[4 * z * ref_stride], ref_stride, |
| sum0, width); |
| } |
| |
| ssim += dsp->ssim_end_line((const int (*)[4])sum0, (const int (*)[4])sum1, width - 1); |
| } |
| |
| score[c] = ssim; |
| } |
| |
| return 0; |
| } |
| |
| static double ssim_db(double ssim, double weight) |
| { |
| return (fabs(weight - ssim) > 1e-9) ? 10.0 * log10(weight / (weight - ssim)) : INFINITY; |
| } |
| |
| static int do_ssim(FFFrameSync *fs) |
| { |
| AVFilterContext *ctx = fs->parent; |
| SSIMContext *s = ctx->priv; |
| AVFrame *master, *ref; |
| AVDictionary **metadata; |
| double c[4] = {0}, ssimv = 0.0; |
| ThreadData td; |
| int ret, i; |
| |
| ret = ff_framesync_dualinput_get(fs, &master, &ref); |
| if (ret < 0) |
| return ret; |
| if (ctx->is_disabled || !ref) |
| return ff_filter_frame(ctx->outputs[0], master); |
| metadata = &master->metadata; |
| |
| s->nb_frames++; |
| |
| td.nb_components = s->nb_components; |
| td.dsp = &s->dsp; |
| td.score = s->score; |
| td.temp = s->temp; |
| td.max = s->max; |
| |
| for (int n = 0; n < s->nb_components; n++) { |
| td.main_data[n] = master->data[n]; |
| td.ref_data[n] = ref->data[n]; |
| td.main_linesize[n] = master->linesize[n]; |
| td.ref_linesize[n] = ref->linesize[n]; |
| td.planewidth[n] = s->planewidth[n]; |
| td.planeheight[n] = s->planeheight[n]; |
| } |
| |
| ctx->internal->execute(ctx, s->ssim_plane, &td, NULL, FFMIN((s->planeheight[1] + 3) >> 2, s->nb_threads)); |
| |
| for (i = 0; i < s->nb_components; i++) { |
| for (int j = 0; j < s->nb_threads; j++) |
| c[i] += s->score[j][i]; |
| c[i] = c[i] / (((s->planewidth[i] >> 2) - 1) * ((s->planeheight[i] >> 2) - 1)); |
| } |
| |
| for (i = 0; i < s->nb_components; i++) { |
| ssimv += s->coefs[i] * c[i]; |
| s->ssim[i] += c[i]; |
| } |
| |
| for (i = 0; i < s->nb_components; i++) { |
| int cidx = s->is_rgb ? s->rgba_map[i] : i; |
| set_meta(metadata, "lavfi.ssim.", s->comps[i], c[cidx]); |
| } |
| s->ssim_total += ssimv; |
| |
| set_meta(metadata, "lavfi.ssim.All", 0, ssimv); |
| set_meta(metadata, "lavfi.ssim.dB", 0, ssim_db(ssimv, 1.0)); |
| |
| if (s->stats_file) { |
| fprintf(s->stats_file, "n:%"PRId64" ", s->nb_frames); |
| |
| for (i = 0; i < s->nb_components; i++) { |
| int cidx = s->is_rgb ? s->rgba_map[i] : i; |
| fprintf(s->stats_file, "%c:%f ", s->comps[i], c[cidx]); |
| } |
| |
| fprintf(s->stats_file, "All:%f (%f)\n", ssimv, ssim_db(ssimv, 1.0)); |
| } |
| |
| return ff_filter_frame(ctx->outputs[0], master); |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| SSIMContext *s = ctx->priv; |
| |
| if (s->stats_file_str) { |
| if (!strcmp(s->stats_file_str, "-")) { |
| s->stats_file = stdout; |
| } else { |
| 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->fs.on_event = do_ssim; |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, |
| AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, |
| 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, |
| #define PF(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf, AV_PIX_FMT_GBR##suf |
| PF(P9), PF(P10), PF(P12), PF(P14), PF(P16), |
| 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) |
| { |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| AVFilterContext *ctx = inlink->dst; |
| SSIMContext *s = ctx->priv; |
| int sum = 0, i; |
| |
| s->nb_threads = ff_filter_get_nb_threads(ctx); |
| 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); |
| } |
| |
| 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'; |
| |
| s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
| s->planeheight[0] = s->planeheight[3] = inlink->h; |
| s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); |
| s->planewidth[0] = s->planewidth[3] = inlink->w; |
| for (i = 0; i < s->nb_components; i++) |
| sum += s->planeheight[i] * s->planewidth[i]; |
| for (i = 0; i < s->nb_components; i++) |
| s->coefs[i] = (double) s->planeheight[i] * s->planewidth[i] / sum; |
| |
| s->temp = av_calloc(s->nb_threads, sizeof(*s->temp)); |
| if (!s->temp) |
| return AVERROR(ENOMEM); |
| |
| for (int t = 0; t < s->nb_threads; t++) { |
| s->temp[t] = av_mallocz_array(2 * SUM_LEN(inlink->w), (desc->comp[0].depth > 8) ? sizeof(int64_t[4]) : sizeof(int[4])); |
| if (!s->temp[t]) |
| return AVERROR(ENOMEM); |
| } |
| s->max = (1 << desc->comp[0].depth) - 1; |
| |
| s->ssim_plane = desc->comp[0].depth > 8 ? ssim_plane_16bit : ssim_plane; |
| s->dsp.ssim_4x4_line = ssim_4x4xn_8bit; |
| s->dsp.ssim_end_line = ssim_endn_8bit; |
| if (ARCH_X86) |
| ff_ssim_init_x86(&s->dsp); |
| |
| s->score = av_calloc(s->nb_threads, sizeof(*s->score)); |
| if (!s->score) |
| return AVERROR(ENOMEM); |
| |
| for (int t = 0; t < s->nb_threads && s->score; t++) { |
| s->score[t] = av_calloc(s->nb_components, sizeof(*s->score[0])); |
| if (!s->score[t]) |
| return AVERROR(ENOMEM); |
| } |
| |
| return 0; |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| SSIMContext *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; |
| |
| outlink->time_base = s->fs.time_base; |
| |
| if (av_cmp_q(mainlink->time_base, outlink->time_base) || |
| av_cmp_q(ctx->inputs[1]->time_base, outlink->time_base)) |
| av_log(ctx, AV_LOG_WARNING, "not matching timebases found between first input: %d/%d and second input %d/%d, results may be incorrect!\n", |
| mainlink->time_base.num, mainlink->time_base.den, |
| ctx->inputs[1]->time_base.num, ctx->inputs[1]->time_base.den); |
| |
| return 0; |
| } |
| |
| static int activate(AVFilterContext *ctx) |
| { |
| SSIMContext *s = ctx->priv; |
| return ff_framesync_activate(&s->fs); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| SSIMContext *s = ctx->priv; |
| |
| if (s->nb_frames > 0) { |
| char buf[256]; |
| int i; |
| buf[0] = 0; |
| for (i = 0; i < s->nb_components; i++) { |
| int c = s->is_rgb ? s->rgba_map[i] : i; |
| av_strlcatf(buf, sizeof(buf), " %c:%f (%f)", s->comps[i], s->ssim[c] / s->nb_frames, |
| ssim_db(s->ssim[c], s->nb_frames)); |
| } |
| av_log(ctx, AV_LOG_INFO, "SSIM%s All:%f (%f)\n", buf, |
| s->ssim_total / s->nb_frames, ssim_db(s->ssim_total, s->nb_frames)); |
| } |
| |
| ff_framesync_uninit(&s->fs); |
| |
| if (s->stats_file && s->stats_file != stdout) |
| fclose(s->stats_file); |
| |
| for (int t = 0; t < s->nb_threads && s->score; t++) |
| av_freep(&s->score[t]); |
| av_freep(&s->score); |
| |
| for (int t = 0; t < s->nb_threads && s->temp; t++) |
| av_freep(&s->temp[t]); |
| av_freep(&s->temp); |
| } |
| |
| static const AVFilterPad ssim_inputs[] = { |
| { |
| .name = "main", |
| .type = AVMEDIA_TYPE_VIDEO, |
| },{ |
| .name = "reference", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_input_ref, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad ssim_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_ssim = { |
| .name = "ssim", |
| .description = NULL_IF_CONFIG_SMALL("Calculate the SSIM between two video streams."), |
| .preinit = ssim_framesync_preinit, |
| .init = init, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .activate = activate, |
| .priv_size = sizeof(SSIMContext), |
| .priv_class = &ssim_class, |
| .inputs = ssim_inputs, |
| .outputs = ssim_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, |
| }; |