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avfilter/vf_zscale: add slice threading support

By ffmpeg threading support implementation via frame slicing and doing zimg_filter_graph_build that used to take 30-60% of each frame processig only if necessary (some parameters changed) the performance increase vs original version in video downscale and color conversion >4x is seen on 64 cores Intel Xeon, 3x on i7-6700K (4 cores with HT)

Victoria Zhislina committed 4 years ago

Commit d0aefc31 parent d607af51 file · +282 −126Browse files

Showing the changes to libavfilter (1 of 1 file). Show all

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libavfilter/vf_zscale.c+282−126
@@ -1,5 +1,6 @@
11 /*
22 * Copyright (c) 2015 Paul B Mahol
3+ * Copyright (c) 2022 Victoria Zhislina, Intel
34 *
45 * This file is part of FFmpeg.
56 *
@@ -44,6 +45,8 @@ · 38 unmodified lines
4445 #include "libavutil/imgutils.h"
4546
4647 #define ZIMG_ALIGNMENT 32
48+#define MIN_TILESIZE 64
49+#define MAX_THREADS 64
4750
4851 static const char *const var_names[] = {
4952 "in_w", "iw",
@@ -113,13 +116,17 @@ typedef struct ZScaleContext { · 63 unmodified lines
113116
114117 int force_original_aspect_ratio;
115118
116− void *tmp;
117− size_t tmp_size;
119+ void *tmp[MAX_THREADS]; //separate for each thread;
120+ int nb_threads;
121+ int slice_h;
118122
119123 zimg_image_format src_format, dst_format;
120124 zimg_image_format alpha_src_format, alpha_dst_format;
125+ zimg_image_format src_format_tmp, dst_format_tmp;
126+ zimg_image_format alpha_src_format_tmp, alpha_dst_format_tmp;
121127 zimg_graph_builder_params alpha_params, params;
122− zimg_filter_graph *alpha_graph, *graph;
128+ zimg_graph_builder_params alpha_params_tmp, params_tmp;
129+ zimg_filter_graph *alpha_graph[MAX_THREADS], *graph[MAX_THREADS];
123130
124131 enum AVColorSpace in_colorspace, out_colorspace;
125132 enum AVColorTransferCharacteristic in_trc, out_trc;
@@ -128,10 +135,35 @@ typedef struct ZScaleContext { · 2 unmodified lines
128135 enum AVChromaLocation in_chromal, out_chromal;
129136 } ZScaleContext;
130137
138+typedef struct ThreadData {
139+ const AVPixFmtDescriptor *desc, *odesc;
140+ AVFrame *in, *out;
141+} ThreadData;
142+
131143 static av_cold int init(AVFilterContext *ctx)
132144 {
133145 ZScaleContext *s = ctx->priv;
134146 int ret;
147+ int i;
148+ for (i = 0; i < MAX_THREADS; i++) {
149+ s->tmp[i] = NULL;
150+ s->graph[i] = NULL;
151+ s->alpha_graph[i] = NULL;
152+ }
153+ zimg_image_format_default(&s->src_format, ZIMG_API_VERSION);
154+ zimg_image_format_default(&s->dst_format, ZIMG_API_VERSION);
155+ zimg_image_format_default(&s->src_format_tmp, ZIMG_API_VERSION);
156+ zimg_image_format_default(&s->dst_format_tmp, ZIMG_API_VERSION);
157+
158+ zimg_image_format_default(&s->alpha_src_format, ZIMG_API_VERSION);
159+ zimg_image_format_default(&s->alpha_dst_format, ZIMG_API_VERSION);
160+ zimg_image_format_default(&s->alpha_src_format_tmp, ZIMG_API_VERSION);
161+ zimg_image_format_default(&s->alpha_dst_format_tmp, ZIMG_API_VERSION);
162+
163+ zimg_graph_builder_params_default(&s->params, ZIMG_API_VERSION);
164+ zimg_graph_builder_params_default(&s->params_tmp, ZIMG_API_VERSION);
165+ zimg_graph_builder_params_default(&s->alpha_params, ZIMG_API_VERSION);
166+ zimg_graph_builder_params_default(&s->alpha_params_tmp, ZIMG_API_VERSION);
135167
136168 if (s->size_str && (s->w_expr || s->h_expr)) {
137169 av_log(ctx, AV_LOG_ERROR,
@@ -471,6 +503,51 @@ static enum AVColorRange convert_range_from_zimg(enum zimg_pixel_range_e color_r · 333 unmodified lines
471503 return AVCOL_RANGE_UNSPECIFIED;
472504 }
473505
506+/* returns 0 if image formats are the same and 1 otherwise */
507+static int compare_zimg_image_formats(zimg_image_format *img_fmt0, zimg_image_format *img_fmt1)
508+{
509+ return ((img_fmt0->chroma_location != img_fmt1->chroma_location) ||
510+#if ZIMG_API_VERSION >= 0x204
511+ (img_fmt0->alpha != img_fmt1->alpha) ||
512+#endif
513+ (img_fmt0->color_family != img_fmt1->color_family) ||
514+ (img_fmt0->color_primaries != img_fmt1->color_primaries) ||
515+ (img_fmt0->depth != img_fmt1->depth) ||
516+ (img_fmt0->field_parity != img_fmt1->field_parity) ||
517+ (img_fmt0->height != img_fmt1->height) ||
518+ (img_fmt0->matrix_coefficients != img_fmt1->matrix_coefficients) ||
519+ (img_fmt0->pixel_range != img_fmt1->pixel_range) ||
520+ (img_fmt0->pixel_type != img_fmt1->pixel_type) ||
521+ (img_fmt0->subsample_h != img_fmt1->subsample_h) ||
522+ (img_fmt0->subsample_w != img_fmt1->subsample_w) ||
523+ (img_fmt0->transfer_characteristics != img_fmt1->transfer_characteristics) ||
524+ (img_fmt0->width != img_fmt1->width));
525+}
526+
527+/* returns 0 if graph builder parameters are the same and 1 otherwise */
528+static int compare_zimg_graph_builder_params(zimg_graph_builder_params *parm0, zimg_graph_builder_params *parm1)
529+{
530+ /* the parameters that could be changed inside a single ffmpeg zscale invocation are checked only
531+ and NaN values that are default for some params are treated properly*/
532+ int ret = (parm0->allow_approximate_gamma != parm1->allow_approximate_gamma) ||
533+ (parm0->dither_type != parm1->dither_type) ||
534+ (parm0->resample_filter != parm1->resample_filter) ||
535+ (parm0->resample_filter_uv != parm1->resample_filter_uv);
536+
537+ if ((isnan(parm0->nominal_peak_luminance) == 0) || (isnan(parm1->nominal_peak_luminance) == 0))
538+ ret = ret || (parm0->nominal_peak_luminance != parm1->nominal_peak_luminance);
539+ if ((isnan(parm0->filter_param_a) == 0) || (isnan(parm1->filter_param_a) == 0))
540+ ret = ret || (parm0->filter_param_a != parm1->filter_param_a);
541+ if ((isnan(parm0->filter_param_a_uv) == 0) || (isnan(parm1->filter_param_a_uv) == 0))
542+ ret = ret || (parm0->filter_param_a_uv != parm1->filter_param_a_uv);
543+ if ((isnan(parm0->filter_param_b) == 0) || (isnan(parm1->filter_param_b) == 0))
544+ ret = ret || (parm0->filter_param_b != parm1->filter_param_b);
545+ if ((isnan(parm0->filter_param_b_uv) == 0) || (isnan(parm1->filter_param_b_uv) == 0))
546+ ret = ret || (parm0->filter_param_b_uv != parm1->filter_param_b_uv);
547+
548+ return ret;
549+}
550+
474551 static void format_init(zimg_image_format *format, AVFrame *frame, const AVPixFmtDescriptor *desc,
475552 int colorspace, int primaries, int transfer, int range, int location)
476553 {
@@ -483,46 +560,94 @@ static void format_init(zimg_image_format *format, AVFrame *frame, const AVPixFm · 6 unmodified lines
483560 format->color_family = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_COLOR_RGB : ZIMG_COLOR_YUV;
484561 format->matrix_coefficients = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_MATRIX_RGB : colorspace == -1 ? convert_matrix(frame->colorspace) : colorspace;
485562 format->color_primaries = primaries == -1 ? convert_primaries(frame->color_primaries) : primaries;
486− format->transfer_characteristics = transfer == - 1 ? convert_trc(frame->color_trc) : transfer;
563+ format->transfer_characteristics = transfer == -1 ? convert_trc(frame->color_trc) : transfer;
487564 format->pixel_range = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_RANGE_FULL : range == -1 ? convert_range(frame->color_range) : range;
488565 format->chroma_location = location == -1 ? convert_chroma_location(frame->chroma_location) : location;
489566 }
490567
491−static int graph_build(zimg_filter_graph **graph, zimg_graph_builder_params *params,
492− zimg_image_format *src_format, zimg_image_format *dst_format,
493− void **tmp, size_t *tmp_size)
568+static int graphs_build(AVFrame *in, AVFrame *out, const AVPixFmtDescriptor *desc, const AVPixFmtDescriptor *out_desc,
569+ ZScaleContext *s, int job_nr)
494570 {
495571 int ret;
496572 size_t size;
573+ zimg_image_format src_format;
574+ zimg_image_format dst_format;
575+ zimg_image_format alpha_src_format;
576+ zimg_image_format alpha_dst_format;
577+
578+ src_format = s->src_format;
579+ dst_format = s->dst_format;
580+ /* The input slice is specified through the active_region field,
581+ unlike the output slice.
582+ according to zimg requirements input and output slices should have even dimentions */
583+ src_format.active_region.width = in->width;
584+ src_format.active_region.height = s->slice_h;
585+ src_format.active_region.left = 0;
586+ src_format.active_region.top = job_nr * src_format.active_region.height;
587+ //dst now is the single tile only!!
588+ dst_format.width = out->width;
589+ dst_format.height = ((unsigned int)(out->height / s->nb_threads)) & 0xfffffffe;
590+
591+ //the last slice could differ from the previous ones due to the slices division "tail"
592+ if (job_nr == (s->nb_threads - 1)) {
593+ src_format.active_region.height = src_format.height - src_format.active_region.top;
594+ dst_format.height = out->height - job_nr * dst_format.height;
595+ }
497596
498− zimg_filter_graph_free(*graph);
499− *graph = zimg_filter_graph_build(src_format, dst_format, params);
500− if (!*graph)
597+ if (s->graph[job_nr]) {
598+ zimg_filter_graph_free(s->graph[job_nr]);
599+ }
600+ s->graph[job_nr] = zimg_filter_graph_build(&src_format, &dst_format, &s->params);
601+ if (!s->graph[job_nr])
501602 return print_zimg_error(NULL);
502603
503− ret = zimg_filter_graph_get_tmp_size(*graph, &size);
604+ ret = zimg_filter_graph_get_tmp_size(s->graph[job_nr], &size);
504605 if (ret)
505606 return print_zimg_error(NULL);
506607
507− if (size > *tmp_size) {
508− av_freep(tmp);
509− *tmp = av_malloc(size);
510− if (!*tmp)
511− return AVERROR(ENOMEM);
512−
513− *tmp_size = size;
514− }
608+ if (s->tmp[job_nr])
609+ av_freep(&s->tmp[job_nr]);
610+ s->tmp[job_nr] = av_malloc(size);
611+ if (!s->tmp[job_nr])
612+ return AVERROR(ENOMEM);
613+
614+ if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && out_desc->flags & AV_PIX_FMT_FLAG_ALPHA) {
615+ alpha_src_format = s->alpha_src_format;
616+ alpha_dst_format = s->alpha_dst_format;
617+ /* The input slice is specified through the active_region field, unlike the output slice.
618+ according to zimg requirements input and output slices should have even dimentions */
619+ alpha_src_format.active_region.width = in->width;
620+ alpha_src_format.active_region.height = s->slice_h;
621+ alpha_src_format.active_region.left = 0;
622+ alpha_src_format.active_region.top = job_nr * alpha_src_format.active_region.height;
623+ //dst now is the single tile only!!
624+ alpha_dst_format.width = out->width;
625+ alpha_dst_format.height = ((unsigned int)(out->height / s->nb_threads)) & 0xfffffffe;
626+
627+ //the last slice could differ from the previous ones due to the slices division "tail"
628+ if (job_nr == (s->nb_threads - 1)) {
629+ alpha_src_format.active_region.height = alpha_src_format.height - alpha_src_format.active_region.top;
630+ alpha_dst_format.height = out->height - job_nr * alpha_dst_format.height;
631+ }
515632
633+ if (s->alpha_graph[job_nr]) {
634+ zimg_filter_graph_free(s->alpha_graph[job_nr]);
635+ }
636+ s->alpha_graph[job_nr] = zimg_filter_graph_build(&alpha_src_format, &alpha_dst_format, &s->alpha_params);
637+ if (!s->alpha_graph[job_nr])
638+ return print_zimg_error(NULL);
639+ }
516640 return 0;
517641 }
518642
519643 static int realign_frame(const AVPixFmtDescriptor *desc, AVFrame **frame)
520644 {
521645 AVFrame *aligned = NULL;
522− int ret = 0, plane;
646+ int ret = 0, plane, planes;
523647
524648 /* Realign any unaligned input frame. */
525− for (plane = 0; plane < 3; plane++) {
649+ planes = av_pix_fmt_count_planes(desc->nb_components);
650+ for (plane = 0; plane < planes; plane++) {
526651 int p = desc->comp[plane].plane;
527652 if ((uintptr_t)(*frame)->data[p] % ZIMG_ALIGNMENT || (*frame)->linesize[p] % ZIMG_ALIGNMENT) {
528653 if (!(aligned = av_frame_alloc())) {
@@ -572,20 +697,77 @@ static void update_output_color_information(ZScaleContext *s, AVFrame *frame) · 43 unmodified lines
572697 frame->chroma_location = (int)s->dst_format.chroma_location + 1;
573698 }
574699
700+static int filter_slice(AVFilterContext *ctx, void *data, int job_nr, int n_jobs)
701+{
702+ ThreadData *td = data;
703+ int ret = 0;
704+ int p;
705+ int out_sampl;
706+ int need_gb;
707+ ZScaleContext *s = ctx->priv;
708+ zimg_image_buffer_const src_buf = { ZIMG_API_VERSION };
709+ zimg_image_buffer dst_buf = { ZIMG_API_VERSION };
710+ int dst_tile_height = ((unsigned int)(td->out->height / n_jobs)) & 0xfffffffe;
711+
712+ /* create zimg filter graphs for each thread
713+ only if not created earlier or there is some change in frame parameters */
714+ need_gb = compare_zimg_image_formats(&s->src_format, &s->src_format_tmp) ||
715+ compare_zimg_image_formats(&s->dst_format, &s->dst_format_tmp) ||
716+ compare_zimg_graph_builder_params(&s->params, &s->params_tmp);
717+ if(td->desc->flags & AV_PIX_FMT_FLAG_ALPHA && td->odesc->flags & AV_PIX_FMT_FLAG_ALPHA)
718+ need_gb = need_gb || compare_zimg_image_formats(&s->alpha_src_format, &s->alpha_src_format_tmp) ||
719+ compare_zimg_image_formats(&s->alpha_dst_format, &s->alpha_dst_format_tmp) ||
720+ compare_zimg_graph_builder_params(&s->alpha_params, &s->alpha_params_tmp);
721+
722+ if (need_gb){
723+ ret = graphs_build(td->in, td->out, td->desc, td->odesc, s, job_nr);
724+ if (ret < 0)
725+ return print_zimg_error(ctx);
726+ }
727+ out_sampl = FFMAX3(td->out->linesize[0], td->out->linesize[1], td->out->linesize[2]);
728+ for (int i = 0; i < 3; i++) {
729+ p = td->desc->comp[i].plane;
730+
731+ src_buf.plane[i].data = td->in->data[p];
732+ src_buf.plane[i].stride = td->in->linesize[p];
733+ src_buf.plane[i].mask = -1;
734+
735+ p = td->odesc->comp[i].plane;
736+ dst_buf.plane[i].data = td->out->data[p] + td->out->linesize[p] * dst_tile_height * td->out->linesize[p] / out_sampl * job_nr;
737+ dst_buf.plane[i].stride = td->out->linesize[p];
738+ dst_buf.plane[i].mask = -1;
739+ }
740+ ret = zimg_filter_graph_process(s->graph[job_nr], &src_buf, &dst_buf, s->tmp[job_nr], 0, 0, 0, 0);
741+ if (ret)
742+ return print_zimg_error(ctx);
743+
744+ if (td->desc->flags & AV_PIX_FMT_FLAG_ALPHA && td->odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
745+ src_buf.plane[0].data = td->in->data[3];
746+ src_buf.plane[0].stride = td->in->linesize[3];
747+ src_buf.plane[0].mask = -1;
748+
749+ dst_buf.plane[0].data = td->out->data[3] + td->out->linesize[3] * dst_tile_height * job_nr;
750+ dst_buf.plane[0].stride = td->out->linesize[3];
751+ dst_buf.plane[0].mask = -1;
752+
753+ ret = zimg_filter_graph_process(s->alpha_graph[job_nr], &src_buf, &dst_buf, s->tmp[job_nr], 0, 0, 0, 0);
754+ if (ret)
755+ return print_zimg_error(ctx);
756+ }
757+ return 0;
758+}
759+
575760 static int filter_frame(AVFilterLink *link, AVFrame *in)
576761 {
577− ZScaleContext *s = link->dst->priv;
578− AVFilterLink *outlink = link->dst->outputs[0];
762+ AVFilterContext *ctx = link->dst;
763+ ZScaleContext *s = ctx->priv;
764+ AVFilterLink *outlink = ctx->outputs[0];
579765 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
580766 const AVPixFmtDescriptor *odesc = av_pix_fmt_desc_get(outlink->format);
581− zimg_image_buffer_const src_buf = { ZIMG_API_VERSION };
582− zimg_image_buffer dst_buf = { ZIMG_API_VERSION };
583767 char buf[32];
584− int ret = 0, plane;
768+ int ret = 0;
585769 AVFrame *out = NULL;
586−
587− if ((ret = realign_frame(desc, &in)) < 0)
588− goto fail;
770+ ThreadData td;
589771
590772 if (!(out = ff_get_video_buffer(outlink, outlink->w, outlink->h))) {
591773 ret = AVERROR(ENOMEM);
@@ -596,19 +778,23 @@ static int filter_frame(AVFilterLink *link, AVFrame *in) · 4 unmodified lines
596778 out->width = outlink->w;
597779 out->height = outlink->h;
598780
599− if( in->width != link->w
600− || in->height != link->h
601− || in->format != link->format
602− || s->in_colorspace != in->colorspace
603− || s->in_trc != in->color_trc
604− || s->in_primaries != in->color_primaries
605− || s->in_range != in->color_range
606− || s->out_colorspace != out->colorspace
607− || s->out_trc != out->color_trc
608− || s->out_primaries != out->color_primaries
609− || s->out_range != out->color_range
610− || s->in_chromal != in->chroma_location
611− || s->out_chromal != out->chroma_location) {
781+ //we need to use this filter if something is different for an input and output only
782+ //otherwise - just copy the input frame to the output
783+ if ((link->w != outlink->w) ||
784+ (link->h != outlink->h) ||
785+ (s->src_format.chroma_location != s->dst_format.chroma_location) ||
786+ (s->src_format.color_family !=s->dst_format.color_family) ||
787+ (s->src_format.color_primaries !=s->dst_format.color_primaries) ||
788+ (s->src_format.depth !=s->dst_format.depth) ||
789+ (s->src_format.matrix_coefficients !=s->dst_format.matrix_coefficients) ||
790+ (s->src_format.field_parity !=s->dst_format.field_parity) ||
791+ (s->src_format.pixel_range !=s->dst_format.pixel_range) ||
792+ (s->src_format.pixel_type !=s->dst_format.pixel_type) ||
793+ (s->src_format.transfer_characteristics !=s->dst_format.transfer_characteristics)
794+ ){
795+ if ((ret = realign_frame(desc, &in)) < 0)
796+ goto fail;
797+
612798 snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
613799 av_opt_set(s, "w", buf, 0);
614800 snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
@@ -618,13 +804,26 @@ static int filter_frame(AVFilterLink *link, AVFrame *in) · 3 unmodified lines
618804 link->dst->inputs[0]->w = in->width;
619805 link->dst->inputs[0]->h = in->height;
620806
621− if ((ret = config_props(outlink)) < 0)
622− goto fail;
807+ s->nb_threads = FFMIN(ff_filter_get_nb_threads(ctx), link->h / MIN_TILESIZE);
808+ s->slice_h = ((unsigned int)(link->h / s->nb_threads)) & 0xfffffffe; // slice_h should be even for zimg
809+ s->in_colorspace = in->colorspace;
810+ s->in_trc = in->color_trc;
811+ s->in_primaries = in->color_primaries;
812+ s->in_range = in->color_range;
813+ s->out_colorspace = out->colorspace;
814+ s->out_trc = out->color_trc;
815+ s->out_primaries = out->color_primaries;
816+ s->out_range = out->color_range;
623817
624818 zimg_image_format_default(&s->src_format, ZIMG_API_VERSION);
625819 zimg_image_format_default(&s->dst_format, ZIMG_API_VERSION);
626820 zimg_graph_builder_params_default(&s->params, ZIMG_API_VERSION);
627821
822+ format_init(&s->src_format, in, desc, s->colorspace_in,
823+ s->primaries_in, s->trc_in, s->range_in, s->chromal_in);
824+ format_init(&s->dst_format, out, odesc, s->colorspace,
825+ s->primaries, s->trc, s->range, s->chromal);
826+
628827 s->params.dither_type = s->dither;
629828 s->params.cpu_type = ZIMG_CPU_AUTO;
630829 s->params.resample_filter = s->filter;
@@ -634,27 +833,6 @@ static int filter_frame(AVFilterLink *link, AVFrame *in) · 3 unmodified lines
634833 s->params.filter_param_a = s->params.filter_param_a_uv = s->param_a;
635834 s->params.filter_param_b = s->params.filter_param_b_uv = s->param_b;
636835
637− format_init(&s->src_format, in, desc, s->colorspace_in,
638− s->primaries_in, s->trc_in, s->range_in, s->chromal_in);
639− format_init(&s->dst_format, out, odesc, s->colorspace,
640− s->primaries, s->trc, s->range, s->chromal);
641−
642− update_output_color_information(s, out);
643−
644− ret = graph_build(&s->graph, &s->params, &s->src_format, &s->dst_format,
645− &s->tmp, &s->tmp_size);
646− if (ret < 0)
647− goto fail;
648−
649− s->in_colorspace = in->colorspace;
650− s->in_trc = in->color_trc;
651− s->in_primaries = in->color_primaries;
652− s->in_range = in->color_range;
653− s->out_colorspace = out->colorspace;
654− s->out_trc = out->color_trc;
655− s->out_primaries = out->color_primaries;
656− s->out_range = out->color_range;
657−
658836 if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
659837 zimg_image_format_default(&s->alpha_src_format, ZIMG_API_VERSION);
660838 zimg_image_format_default(&s->alpha_dst_format, ZIMG_API_VERSION);
@@ -670,76 +848,52 @@ static int filter_frame(AVFilterLink *link, AVFrame *in) · 9 unmodified lines
670848 s->alpha_src_format.pixel_type = (desc->flags & AV_PIX_FMT_FLAG_FLOAT) ? ZIMG_PIXEL_FLOAT : desc->comp[0].depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
671849 s->alpha_src_format.color_family = ZIMG_COLOR_GREY;
672850
673− s->alpha_dst_format.width = out->width;
674− s->alpha_dst_format.height = out->height;
675851 s->alpha_dst_format.depth = odesc->comp[0].depth;
676852 s->alpha_dst_format.pixel_type = (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) ? ZIMG_PIXEL_FLOAT : odesc->comp[0].depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
677853 s->alpha_dst_format.color_family = ZIMG_COLOR_GREY;
678−
679− zimg_filter_graph_free(s->alpha_graph);
680− s->alpha_graph = zimg_filter_graph_build(&s->alpha_src_format, &s->alpha_dst_format, &s->alpha_params);
681− if (!s->alpha_graph) {
682− ret = print_zimg_error(link->dst);
683− goto fail;
684− }
685854 }
686− }
687−
688− update_output_color_information(s, out);
689−
690− av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
691− (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
692− (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
693− INT_MAX);
694−
695− for (plane = 0; plane < 3; plane++) {
696− int p = desc->comp[plane].plane;
697− src_buf.plane[plane].data = in->data[p];
698− src_buf.plane[plane].stride = in->linesize[p];
699− src_buf.plane[plane].mask = -1;
700−
701− p = odesc->comp[plane].plane;
702− dst_buf.plane[plane].data = out->data[p];
703− dst_buf.plane[plane].stride = out->linesize[p];
704− dst_buf.plane[plane].mask = -1;
705− }
706855
707− ret = zimg_filter_graph_process(s->graph, &src_buf, &dst_buf, s->tmp, 0, 0, 0, 0);
708− if (ret) {
709− ret = print_zimg_error(link->dst);
710− goto fail;
711− }
856+ update_output_color_information(s, out);
857+ av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
858+ (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
859+ (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
860+ INT_MAX);
712861
713− if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
714− src_buf.plane[0].data = in->data[3];
715− src_buf.plane[0].stride = in->linesize[3];
716− src_buf.plane[0].mask = -1;
862+ td.in = in;
863+ td.out = out;
864+ td.desc = desc;
865+ td.odesc = odesc;
717866
718− dst_buf.plane[0].data = out->data[3];
719− dst_buf.plane[0].stride = out->linesize[3];
720− dst_buf.plane[0].mask = -1;
867+ ff_filter_execute(ctx, filter_slice, &td, NULL, s->nb_threads);
721868
722− ret = zimg_filter_graph_process(s->alpha_graph, &src_buf, &dst_buf, s->tmp, 0, 0, 0, 0);
723− if (ret) {
724− ret = print_zimg_error(link->dst);
725− goto fail;
869+ s->src_format_tmp = s->src_format;
870+ s->dst_format_tmp = s->dst_format;
871+ s->params_tmp = s->params;
872+ if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
873+ s->alpha_src_format_tmp = s->alpha_src_format;
874+ s->alpha_dst_format_tmp = s->alpha_dst_format;
875+ s->alpha_params_tmp = s->alpha_params;
726876 }
727− } else if (odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
728− int x, y;
729−
730− if (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) {
731− for (y = 0; y < out->height; y++) {
732− for (x = 0; x < out->width; x++) {
733− AV_WN32(out->data[3] + x * odesc->comp[3].step + y * out->linesize[3],
734− av_float2int(1.0f));
877+
878+ if ((!(desc->flags & AV_PIX_FMT_FLAG_ALPHA)) && (odesc->flags & AV_PIX_FMT_FLAG_ALPHA) ){
879+ int x, y;
880+ if (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) {
881+ for (y = 0; y < out->height; y++) {
882+ for (x = 0; x < out->width; x++) {
883+ AV_WN32(out->data[3] + x * odesc->comp[3].step + y * out->linesize[3],
884+ av_float2int(1.0f));
885+ }
735886 }
887+ } else {
888+ for (y = 0; y < outlink->h; y++)
889+ memset(out->data[3] + y * out->linesize[3], 0xff, outlink->w);
736890 }
737− } else {
738− for (y = 0; y < outlink->h; y++)
739− memset(out->data[3] + y * out->linesize[3], 0xff, outlink->w);
740891 }
741892 }
742−
893+ else {
894+ /*no need for any filtering */
895+ return ff_filter_frame(outlink, in);
896+ }
743897 fail:
744898 av_frame_free(&in);
745899 if (ret) {
@@ -754,10 +908,11 @@ static av_cold void uninit(AVFilterContext *ctx) · 8 unmodified lines
754908 {
755909 ZScaleContext *s = ctx->priv;
756910
757− zimg_filter_graph_free(s->graph);
758− zimg_filter_graph_free(s->alpha_graph);
759− av_freep(&s->tmp);
760− s->tmp_size = 0;
911+ for (int i = 0; i < s->nb_threads; i++) {
912+ av_freep(&s->tmp[i]);
913+ zimg_filter_graph_free(s->graph[i]);
914+ zimg_filter_graph_free(s->alpha_graph[i]);
915+ }
761916 }
762917
763918 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
@@ -941,4 +1096,5 @@ const AVFilter ff_vf_zscale = { · 177 unmodified lines
9411096 FILTER_OUTPUTS(avfilter_vf_zscale_outputs),
9421097 FILTER_QUERY_FUNC(query_formats),
9431098 .process_command = process_command,
1099+ .flags = AVFILTER_FLAG_SLICE_THREADS,
9441100 };

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