/* * filter graphs * Copyright (c) 2008 Vitor Sessak * Copyright (c) 2007 Bobby Bingham * * 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 */ #include "config.h" #include <string.h> #include "libavutil/avassert.h" #include "libavutil/bprint.h" #include "libavutil/channel_layout.h" #include "libavutil/imgutils.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #define FF_INTERNAL_FIELDS 1 #include "framequeue.h" #include "avfilter.h" #include "buffersink.h" #include "formats.h" #include "internal.h" #include "thread.h" #define OFFSET(x) offsetof(AVFilterGraph, x) #define F AV_OPT_FLAG_FILTERING_PARAM #define V AV_OPT_FLAG_VIDEO_PARAM #define A AV_OPT_FLAG_AUDIO_PARAM static const AVOption filtergraph_options[] = { { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS, { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, F|V|A, "thread_type" }, { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = F|V|A, .unit = "thread_type" }, { "threads", "Maximum number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, F|V|A, "threads"}, {"auto", "autodetect a suitable number of threads to use", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, .flags = F|V|A, .unit = "threads"}, {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|V }, {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|A }, { NULL }, }; static const AVClass filtergraph_class = { .class_name = "AVFilterGraph", .item_name = av_default_item_name, .version = LIBAVUTIL_VERSION_INT, .option = filtergraph_options, .category = AV_CLASS_CATEGORY_FILTER, }; #if !HAVE_THREADS void ff_graph_thread_free(AVFilterGraph *graph) { } int ff_graph_thread_init(AVFilterGraph *graph) { graph->thread_type = 0; graph->nb_threads = 1; return 0; } #endif AVFilterGraph *avfilter_graph_alloc(void) { AVFilterGraph *ret = av_mallocz(sizeof(*ret)); if (!ret) return NULL; ret->internal = av_mallocz(sizeof(*ret->internal)); if (!ret->internal) { av_freep(&ret); return NULL; } ret->av_class = &filtergraph_class; av_opt_set_defaults(ret); ff_framequeue_global_init(&ret->internal->frame_queues); return ret; } void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter) { int i, j; for (i = 0; i < graph->nb_filters; i++) { if (graph->filters[i] == filter) { FFSWAP(AVFilterContext*, graph->filters[i], graph->filters[graph->nb_filters - 1]); graph->nb_filters--; filter->graph = NULL; for (j = 0; j<filter->nb_outputs; j++) if (filter->outputs[j]) filter->outputs[j]->graph = NULL; return; } } } void avfilter_graph_free(AVFilterGraph **graph) { if (!*graph) return; while ((*graph)->nb_filters) avfilter_free((*graph)->filters[0]); ff_graph_thread_free(*graph); av_freep(&(*graph)->sink_links); av_opt_free(*graph); av_freep(&(*graph)->filters); av_freep(&(*graph)->internal); av_freep(graph); } int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx) { int ret; *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name); if (!*filt_ctx) return AVERROR(ENOMEM); ret = avfilter_init_str(*filt_ctx, args); if (ret < 0) goto fail; return 0; fail: avfilter_free(*filt_ctx); *filt_ctx = NULL; return ret; } void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags) { graph->disable_auto_convert = flags; } AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name) { AVFilterContext **filters, *s; if (graph->thread_type && !graph->internal->thread_execute) { if (graph->execute) { graph->internal->thread_execute = graph->execute; } else { int ret = ff_graph_thread_init(graph); if (ret < 0) { av_log(graph, AV_LOG_ERROR, "Error initializing threading: %s.\n", av_err2str(ret)); return NULL; } } } filters = av_realloc_array(graph->filters, graph->nb_filters + 1, sizeof(*filters)); if (!filters) return NULL; graph->filters = filters; s = ff_filter_alloc(filter, name); if (!s) return NULL; graph->filters[graph->nb_filters++] = s; s->graph = graph; return s; } /** * Check for the validity of graph. * * A graph is considered valid if all its input and output pads are * connected. * * @return >= 0 in case of success, a negative value otherwise */ static int graph_check_validity(AVFilterGraph *graph, void *log_ctx) { AVFilterContext *filt; int i, j; for (i = 0; i < graph->nb_filters; i++) { const AVFilterPad *pad; filt = graph->filters[i]; for (j = 0; j < filt->nb_inputs; j++) { if (!filt->inputs[j] || !filt->inputs[j]->src) { pad = &filt->input_pads[j]; av_log(log_ctx, AV_LOG_ERROR, "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n", pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name); return AVERROR(EINVAL); } } for (j = 0; j < filt->nb_outputs; j++) { if (!filt->outputs[j] || !filt->outputs[j]->dst) { pad = &filt->output_pads[j]; av_log(log_ctx, AV_LOG_ERROR, "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n", pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name); return AVERROR(EINVAL); } } } return 0; } /** * Configure all the links of graphctx. * * @return >= 0 in case of success, a negative value otherwise */ static int graph_config_links(AVFilterGraph *graph, void *log_ctx) { AVFilterContext *filt; int i, ret; for (i = 0; i < graph->nb_filters; i++) { filt = graph->filters[i]; if (!filt->nb_outputs) { if ((ret = avfilter_config_links(filt))) return ret; } } return 0; } static int graph_check_links(AVFilterGraph *graph, void *log_ctx) { AVFilterContext *f; AVFilterLink *l; unsigned i, j; int ret; for (i = 0; i < graph->nb_filters; i++) { f = graph->filters[i]; for (j = 0; j < f->nb_outputs; j++) { l = f->outputs[j]; if (l->type == AVMEDIA_TYPE_VIDEO) { ret = av_image_check_size2(l->w, l->h, INT64_MAX, l->format, 0, f); if (ret < 0) return ret; } } } return 0; } AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, const char *name) { int i; for (i = 0; i < graph->nb_filters; i++) if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name)) return graph->filters[i]; return NULL; } static int filter_link_check_formats(void *log, AVFilterLink *link, AVFilterFormatsConfig *cfg) { int ret; switch (link->type) { case AVMEDIA_TYPE_VIDEO: if ((ret = ff_formats_check_pixel_formats(log, cfg->formats)) < 0) return ret; break; case AVMEDIA_TYPE_AUDIO: if ((ret = ff_formats_check_sample_formats(log, cfg->formats)) < 0 || (ret = ff_formats_check_sample_rates(log, cfg->samplerates)) < 0 || (ret = ff_formats_check_channel_layouts(log, cfg->channel_layouts)) < 0) return ret; break; default: av_assert0(!"reached"); } return 0; } /** * Check the validity of the formats / etc. lists set by query_formats(). * * In particular, check they do not contain any redundant element. */ static int filter_check_formats(AVFilterContext *ctx) { unsigned i; int ret; for (i = 0; i < ctx->nb_inputs; i++) { ret = filter_link_check_formats(ctx, ctx->inputs[i], &ctx->inputs[i]->outcfg); if (ret < 0) return ret; } for (i = 0; i < ctx->nb_outputs; i++) { ret = filter_link_check_formats(ctx, ctx->outputs[i], &ctx->outputs[i]->incfg); if (ret < 0) return ret; } return 0; } static int filter_query_formats(AVFilterContext *ctx) { int ret; AVFilterFormats *formats; AVFilterChannelLayouts *chlayouts; enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type : ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type : AVMEDIA_TYPE_VIDEO; if ((ret = ctx->filter->formats.query_func(ctx)) < 0) { if (ret != AVERROR(EAGAIN)) av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n", ctx->name, av_err2str(ret)); return ret; } ret = filter_check_formats(ctx); if (ret < 0) return ret; formats = ff_all_formats(type); if ((ret = ff_set_common_formats(ctx, formats)) < 0) return ret; if (type == AVMEDIA_TYPE_AUDIO) { if ((ret = ff_set_common_all_samplerates(ctx)) < 0) return ret; chlayouts = ff_all_channel_layouts(); if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0) return ret; } return 0; } static int formats_declared(AVFilterContext *f) { int i; for (i = 0; i < f->nb_inputs; i++) { if (!f->inputs[i]->outcfg.formats) return 0; if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO && !(f->inputs[i]->outcfg.samplerates && f->inputs[i]->outcfg.channel_layouts)) return 0; } for (i = 0; i < f->nb_outputs; i++) { if (!f->outputs[i]->incfg.formats) return 0; if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO && !(f->outputs[i]->incfg.samplerates && f->outputs[i]->incfg.channel_layouts)) return 0; } return 1; } /** * Perform one round of query_formats() and merging formats lists on the * filter graph. * @return >=0 if all links formats lists could be queried and merged; * AVERROR(EAGAIN) some progress was made in the queries or merging * and a later call may succeed; * AVERROR(EIO) (may be changed) plus a log message if no progress * was made and the negotiation is stuck; * a negative error code if some other error happened */ static int query_formats(AVFilterGraph *graph, void *log_ctx) { int i, j, ret; int converter_count = 0; int count_queried = 0; /* successful calls to query_formats() */ int count_merged = 0; /* successful merge of formats lists */ int count_already_merged = 0; /* lists already merged */ int count_delayed = 0; /* lists that need to be merged later */ for (i = 0; i < graph->nb_filters; i++) { AVFilterContext *f = graph->filters[i]; if (formats_declared(f)) continue; if (f->filter->formats_state == FF_FILTER_FORMATS_QUERY_FUNC) ret = filter_query_formats(f); else ret = ff_default_query_formats(f); if (ret < 0 && ret != AVERROR(EAGAIN)) return ret; /* note: EAGAIN could indicate a partial success, not counted yet */ count_queried += ret >= 0; } /* go through and merge as many format lists as possible */ for (i = 0; i < graph->nb_filters; i++) { AVFilterContext *filter = graph->filters[i]; for (j = 0; j < filter->nb_inputs; j++) { AVFilterLink *link = filter->inputs[j]; const AVFilterNegotiation *neg; unsigned neg_step; int convert_needed = 0; if (!link) continue; neg = ff_filter_get_negotiation(link); av_assert0(neg); for (neg_step = 1; neg_step < neg->nb_mergers; neg_step++) { const AVFilterFormatsMerger *m = &neg->mergers[neg_step]; void *a = FF_FIELD_AT(void *, m->offset, link->incfg); void *b = FF_FIELD_AT(void *, m->offset, link->outcfg); if (a && b && a != b && !m->can_merge(a, b)) { convert_needed = 1; break; } } for (neg_step = 0; neg_step < neg->nb_mergers; neg_step++) { const AVFilterFormatsMerger *m = &neg->mergers[neg_step]; void *a = FF_FIELD_AT(void *, m->offset, link->incfg); void *b = FF_FIELD_AT(void *, m->offset, link->outcfg); if (!(a && b)) { count_delayed++; } else if (a == b) { count_already_merged++; } else if (!convert_needed) { count_merged++; ret = m->merge(a, b); if (ret < 0) return ret; if (!ret) convert_needed = 1; } } if (convert_needed) { AVFilterContext *convert; const AVFilter *filter; AVFilterLink *inlink, *outlink; char inst_name[30]; const char *opts; if (graph->disable_auto_convert) { av_log(log_ctx, AV_LOG_ERROR, "The filters '%s' and '%s' do not have a common format " "and automatic conversion is disabled.\n", link->src->name, link->dst->name); return AVERROR(EINVAL); } /* couldn't merge format lists. auto-insert conversion filter */ if (!(filter = avfilter_get_by_name(neg->conversion_filter))) { av_log(log_ctx, AV_LOG_ERROR, "'%s' filter not present, cannot convert formats.\n", neg->conversion_filter); return AVERROR(EINVAL); } snprintf(inst_name, sizeof(inst_name), "auto_%s_%d", neg->conversion_filter, converter_count++); opts = FF_FIELD_AT(char *, neg->conversion_opts_offset, *graph); ret = avfilter_graph_create_filter(&convert, filter, inst_name, opts, NULL, graph); if (ret < 0) return ret; if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0) return ret; if ((ret = filter_query_formats(convert)) < 0) return ret; inlink = convert->inputs[0]; outlink = convert->outputs[0]; av_assert0( inlink->incfg.formats->refcount > 0); av_assert0( inlink->outcfg.formats->refcount > 0); av_assert0(outlink->incfg.formats->refcount > 0); av_assert0(outlink->outcfg.formats->refcount > 0); if (outlink->type == AVMEDIA_TYPE_AUDIO) { av_assert0( inlink-> incfg.samplerates->refcount > 0); av_assert0( inlink->outcfg.samplerates->refcount > 0); av_assert0(outlink-> incfg.samplerates->refcount > 0); av_assert0(outlink->outcfg.samplerates->refcount > 0); av_assert0( inlink-> incfg.channel_layouts->refcount > 0); av_assert0( inlink->outcfg.channel_layouts->refcount > 0); av_assert0(outlink-> incfg.channel_layouts->refcount > 0); av_assert0(outlink->outcfg.channel_layouts->refcount > 0); } #define MERGE(merger, link) \ ((merger)->merge(FF_FIELD_AT(void *, (merger)->offset, (link)->incfg), \ FF_FIELD_AT(void *, (merger)->offset, (link)->outcfg))) for (neg_step = 0; neg_step < neg->nb_mergers; neg_step++) { const AVFilterFormatsMerger *m = &neg->mergers[neg_step]; if ((ret = MERGE(m, inlink)) <= 0 || (ret = MERGE(m, outlink)) <= 0) { if (ret < 0) return ret; av_log(log_ctx, AV_LOG_ERROR, "Impossible to convert between the formats supported by the filter " "'%s' and the filter '%s'\n", link->src->name, link->dst->name); return AVERROR(ENOSYS); } } } } } av_log(graph, AV_LOG_DEBUG, "query_formats: " "%d queried, %d merged, %d already done, %d delayed\n", count_queried, count_merged, count_already_merged, count_delayed); if (count_delayed) { AVBPrint bp; /* if count_queried > 0, one filter at least did set its formats, that will give additional information to its neighbour; if count_merged > 0, one pair of formats lists at least was merged, that will give additional information to all connected filters; in both cases, progress was made and a new round must be done */ if (count_queried || count_merged) return AVERROR(EAGAIN); av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC); for (i = 0; i < graph->nb_filters; i++) if (!formats_declared(graph->filters[i])) av_bprintf(&bp, "%s%s", bp.len ? ", " : "", graph->filters[i]->name); av_log(graph, AV_LOG_ERROR, "The following filters could not choose their formats: %s\n" "Consider inserting the (a)format filter near their input or " "output.\n", bp.str); return AVERROR(EIO); } return 0; } static int get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt) { int score = 0; if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt)) score ++; if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) { score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt)); }else score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt)); if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 && av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT) score += 20; if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT && av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32) score += 2; return score; } static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2, enum AVSampleFormat src_fmt) { int score1, score2; score1 = get_fmt_score(dst_fmt1, src_fmt); score2 = get_fmt_score(dst_fmt2, src_fmt); return score1 < score2 ? dst_fmt1 : dst_fmt2; } static int pick_format(AVFilterLink *link, AVFilterLink *ref) { if (!link || !link->incfg.formats) return 0; if (link->type == AVMEDIA_TYPE_VIDEO) { if(ref && ref->type == AVMEDIA_TYPE_VIDEO){ //FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0; enum AVPixelFormat best= AV_PIX_FMT_NONE; int i; for (i = 0; i < link->incfg.formats->nb_formats; i++) { enum AVPixelFormat p = link->incfg.formats->formats[i]; best= av_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL); } av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n", av_get_pix_fmt_name(best), link->incfg.formats->nb_formats, av_get_pix_fmt_name(ref->format), has_alpha); link->incfg.formats->formats[0] = best; } } else if (link->type == AVMEDIA_TYPE_AUDIO) { if(ref && ref->type == AVMEDIA_TYPE_AUDIO){ enum AVSampleFormat best= AV_SAMPLE_FMT_NONE; int i; for (i = 0; i < link->incfg.formats->nb_formats; i++) { enum AVSampleFormat p = link->incfg.formats->formats[i]; best = find_best_sample_fmt_of_2(best, p, ref->format); } av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n", av_get_sample_fmt_name(best), link->incfg.formats->nb_formats, av_get_sample_fmt_name(ref->format)); link->incfg.formats->formats[0] = best; } } link->incfg.formats->nb_formats = 1; link->format = link->incfg.formats->formats[0]; if (link->type == AVMEDIA_TYPE_AUDIO) { int ret; if (!link->incfg.samplerates->nb_formats) { av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for" " the link between filters %s and %s.\n", link->src->name, link->dst->name); return AVERROR(EINVAL); } link->incfg.samplerates->nb_formats = 1; link->sample_rate = link->incfg.samplerates->formats[0]; if (link->incfg.channel_layouts->all_layouts) { av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for" " the link between filters %s and %s.\n", link->src->name, link->dst->name); if (!link->incfg.channel_layouts->all_counts) av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not " "supported, try specifying a channel layout using " "'aformat=channel_layouts=something'.\n"); return AVERROR(EINVAL); } link->incfg.channel_layouts->nb_channel_layouts = 1; ret = av_channel_layout_copy(&link->ch_layout, &link->incfg.channel_layouts->channel_layouts[0]); if (ret < 0) return ret; #if FF_API_OLD_CHANNEL_LAYOUT FF_DISABLE_DEPRECATION_WARNINGS link->channel_layout = link->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? link->ch_layout.u.mask : 0; FF_ENABLE_DEPRECATION_WARNINGS #endif } ff_formats_unref(&link->incfg.formats); ff_formats_unref(&link->outcfg.formats); ff_formats_unref(&link->incfg.samplerates); ff_formats_unref(&link->outcfg.samplerates); ff_channel_layouts_unref(&link->incfg.channel_layouts); ff_channel_layouts_unref(&link->outcfg.channel_layouts); return 0; } #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \ do { \ for (i = 0; i < filter->nb_inputs; i++) { \ AVFilterLink *link = filter->inputs[i]; \ fmt_type fmt; \ \ if (!link->outcfg.list || link->outcfg.list->nb != 1) \ continue; \ fmt = link->outcfg.list->var[0]; \ \ for (j = 0; j < filter->nb_outputs; j++) { \ AVFilterLink *out_link = filter->outputs[j]; \ list_type *fmts; \ \ if (link->type != out_link->type || \ out_link->incfg.list->nb == 1) \ continue; \ fmts = out_link->incfg.list; \ \ if (!out_link->incfg.list->nb) { \ if ((ret = add_format(&out_link->incfg.list, fmt)) < 0)\ return ret; \ ret = 1; \ break; \ } \ \ for (k = 0; k < out_link->incfg.list->nb; k++) \ if (fmts->var[k] == fmt) { \ fmts->var[0] = fmt; \ fmts->nb = 1; \ ret = 1; \ break; \ } \ } \ } \ } while (0) static int reduce_formats_on_filter(AVFilterContext *filter) { int i, j, k, ret = 0; REDUCE_FORMATS(int, AVFilterFormats, formats, formats, nb_formats, ff_add_format); REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats, nb_formats, ff_add_format); /* reduce channel layouts */ for (i = 0; i < filter->nb_inputs; i++) { AVFilterLink *inlink = filter->inputs[i]; const AVChannelLayout *fmt; if (!inlink->outcfg.channel_layouts || inlink->outcfg.channel_layouts->nb_channel_layouts != 1) continue; fmt = &inlink->outcfg.channel_layouts->channel_layouts[0]; for (j = 0; j < filter->nb_outputs; j++) { AVFilterLink *outlink = filter->outputs[j]; AVFilterChannelLayouts *fmts; fmts = outlink->incfg.channel_layouts; if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1) continue; if (fmts->all_layouts && (KNOWN(fmt) || fmts->all_counts)) { /* Turn the infinite list into a singleton */ fmts->all_layouts = fmts->all_counts = 0; if (ff_add_channel_layout(&outlink->incfg.channel_layouts, fmt) < 0) ret = 1; break; } for (k = 0; k < outlink->incfg.channel_layouts->nb_channel_layouts; k++) { if (!av_channel_layout_compare(&fmts->channel_layouts[k], fmt)) { ret = av_channel_layout_copy(&fmts->channel_layouts[0], fmt); if (ret < 0) return ret; fmts->nb_channel_layouts = 1; ret = 1; break; } } } } return ret; } static int reduce_formats(AVFilterGraph *graph) { int i, reduced, ret; do { reduced = 0; for (i = 0; i < graph->nb_filters; i++) { if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0) return ret; reduced |= ret; } } while (reduced); return 0; } static void swap_samplerates_on_filter(AVFilterContext *filter) { AVFilterLink *link = NULL; int sample_rate; int i, j; for (i = 0; i < filter->nb_inputs; i++) { link = filter->inputs[i]; if (link->type == AVMEDIA_TYPE_AUDIO && link->outcfg.samplerates->nb_formats== 1) break; } if (i == filter->nb_inputs) return; sample_rate = link->outcfg.samplerates->formats[0]; for (i = 0; i < filter->nb_outputs; i++) { AVFilterLink *outlink = filter->outputs[i]; int best_idx, best_diff = INT_MAX; if (outlink->type != AVMEDIA_TYPE_AUDIO || outlink->incfg.samplerates->nb_formats < 2) continue; for (j = 0; j < outlink->incfg.samplerates->nb_formats; j++) { int diff = abs(sample_rate - outlink->incfg.samplerates->formats[j]); av_assert0(diff < INT_MAX); // This would lead to the use of uninitialized best_diff but is only possible with invalid sample rates if (diff < best_diff) { best_diff = diff; best_idx = j; } } FFSWAP(int, outlink->incfg.samplerates->formats[0], outlink->incfg.samplerates->formats[best_idx]); } } static void swap_samplerates(AVFilterGraph *graph) { int i; for (i = 0; i < graph->nb_filters; i++) swap_samplerates_on_filter(graph->filters[i]); } #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER) #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT) #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT) #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT) #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT) #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT) #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT) /* allowable substitutions for channel pairs when comparing layouts, * ordered by priority for both values */ static const uint64_t ch_subst[][2] = { { CH_FRONT_PAIR, CH_CENTER_PAIR }, { CH_FRONT_PAIR, CH_WIDE_PAIR }, { CH_FRONT_PAIR, AV_CH_FRONT_CENTER }, { CH_CENTER_PAIR, CH_FRONT_PAIR }, { CH_CENTER_PAIR, CH_WIDE_PAIR }, { CH_CENTER_PAIR, AV_CH_FRONT_CENTER }, { CH_WIDE_PAIR, CH_FRONT_PAIR }, { CH_WIDE_PAIR, CH_CENTER_PAIR }, { CH_WIDE_PAIR, AV_CH_FRONT_CENTER }, { AV_CH_FRONT_CENTER, CH_FRONT_PAIR }, { AV_CH_FRONT_CENTER, CH_CENTER_PAIR }, { AV_CH_FRONT_CENTER, CH_WIDE_PAIR }, { CH_SIDE_PAIR, CH_DIRECT_PAIR }, { CH_SIDE_PAIR, CH_BACK_PAIR }, { CH_SIDE_PAIR, AV_CH_BACK_CENTER }, { CH_BACK_PAIR, CH_DIRECT_PAIR }, { CH_BACK_PAIR, CH_SIDE_PAIR }, { CH_BACK_PAIR, AV_CH_BACK_CENTER }, { AV_CH_BACK_CENTER, CH_BACK_PAIR }, { AV_CH_BACK_CENTER, CH_DIRECT_PAIR }, { AV_CH_BACK_CENTER, CH_SIDE_PAIR }, }; static void swap_channel_layouts_on_filter(AVFilterContext *filter) { AVFilterLink *link = NULL; int i, j, k; for (i = 0; i < filter->nb_inputs; i++) { link = filter->inputs[i]; if (link->type == AVMEDIA_TYPE_AUDIO && link->outcfg.channel_layouts->nb_channel_layouts == 1) break; } if (i == filter->nb_inputs) return; for (i = 0; i < filter->nb_outputs; i++) { AVFilterLink *outlink = filter->outputs[i]; int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX; if (outlink->type != AVMEDIA_TYPE_AUDIO || outlink->incfg.channel_layouts->nb_channel_layouts < 2) continue; for (j = 0; j < outlink->incfg.channel_layouts->nb_channel_layouts; j++) { AVChannelLayout in_chlayout = { 0 }, out_chlayout = { 0 }; int in_channels; int out_channels; int count_diff; int matched_channels, extra_channels; int score = 100000; av_channel_layout_copy(&in_chlayout, &link->outcfg.channel_layouts->channel_layouts[0]); av_channel_layout_copy(&out_chlayout, &outlink->incfg.channel_layouts->channel_layouts[j]); in_channels = in_chlayout.nb_channels; out_channels = out_chlayout.nb_channels; count_diff = out_channels - in_channels; if (!KNOWN(&in_chlayout) || !KNOWN(&out_chlayout)) { /* Compute score in case the input or output layout encodes a channel count; in this case the score is not altered by the computation afterwards, as in_chlayout and out_chlayout have both been set to 0 */ if (!KNOWN(&in_chlayout)) in_channels = FF_LAYOUT2COUNT(&in_chlayout); if (!KNOWN(&out_chlayout)) out_channels = FF_LAYOUT2COUNT(&out_chlayout); score -= 10000 + FFABS(out_channels - in_channels) + (in_channels > out_channels ? 10000 : 0); av_channel_layout_uninit(&in_chlayout); av_channel_layout_uninit(&out_chlayout); /* Let the remaining computation run, even if the score value is not altered */ } /* channel substitution */ for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) { uint64_t cmp0 = ch_subst[k][0]; uint64_t cmp1 = ch_subst[k][1]; if ( av_channel_layout_subset(& in_chlayout, cmp0) && !av_channel_layout_subset(&out_chlayout, cmp0) && av_channel_layout_subset(&out_chlayout, cmp1) && !av_channel_layout_subset(& in_chlayout, cmp1)) { av_channel_layout_from_mask(&in_chlayout, av_channel_layout_subset(& in_chlayout, ~cmp0)); av_channel_layout_from_mask(&out_chlayout, av_channel_layout_subset(&out_chlayout, ~cmp1)); /* add score for channel match, minus a deduction for having to do the substitution */ score += 10 * av_popcount64(cmp1) - 2; } } /* no penalty for LFE channel mismatch */ if (av_channel_layout_channel_from_index(&in_chlayout, AV_CHAN_LOW_FREQUENCY) >= 0 && av_channel_layout_channel_from_index(&out_chlayout, AV_CHAN_LOW_FREQUENCY) >= 0) score += 10; av_channel_layout_from_mask(&in_chlayout, av_channel_layout_subset(&in_chlayout, ~AV_CH_LOW_FREQUENCY)); av_channel_layout_from_mask(&out_chlayout, av_channel_layout_subset(&out_chlayout, ~AV_CH_LOW_FREQUENCY)); matched_channels = av_popcount64(in_chlayout.u.mask & out_chlayout.u.mask); extra_channels = av_popcount64(out_chlayout.u.mask & (~in_chlayout.u.mask)); score += 10 * matched_channels - 5 * extra_channels; if (score > best_score || (count_diff < best_count_diff && score == best_score)) { best_score = score; best_idx = j; best_count_diff = count_diff; } } av_assert0(best_idx >= 0); FFSWAP(AVChannelLayout, outlink->incfg.channel_layouts->channel_layouts[0], outlink->incfg.channel_layouts->channel_layouts[best_idx]); } } static void swap_channel_layouts(AVFilterGraph *graph) { int i; for (i = 0; i < graph->nb_filters; i++) swap_channel_layouts_on_filter(graph->filters[i]); } static void swap_sample_fmts_on_filter(AVFilterContext *filter) { AVFilterLink *link = NULL; int format, bps; int i, j; for (i = 0; i < filter->nb_inputs; i++) { link = filter->inputs[i]; if (link->type == AVMEDIA_TYPE_AUDIO && link->outcfg.formats->nb_formats == 1) break; } if (i == filter->nb_inputs) return; format = link->outcfg.formats->formats[0]; bps = av_get_bytes_per_sample(format); for (i = 0; i < filter->nb_outputs; i++) { AVFilterLink *outlink = filter->outputs[i]; int best_idx = -1, best_score = INT_MIN; if (outlink->type != AVMEDIA_TYPE_AUDIO || outlink->incfg.formats->nb_formats < 2) continue; for (j = 0; j < outlink->incfg.formats->nb_formats; j++) { int out_format = outlink->incfg.formats->formats[j]; int out_bps = av_get_bytes_per_sample(out_format); int score; if (av_get_packed_sample_fmt(out_format) == format || av_get_planar_sample_fmt(out_format) == format) { best_idx = j; break; } /* for s32 and float prefer double to prevent loss of information */ if (bps == 4 && out_bps == 8) { best_idx = j; break; } /* prefer closest higher or equal bps */ score = -abs(out_bps - bps); if (out_bps >= bps) score += INT_MAX/2; if (score > best_score) { best_score = score; best_idx = j; } } av_assert0(best_idx >= 0); FFSWAP(int, outlink->incfg.formats->formats[0], outlink->incfg.formats->formats[best_idx]); } } static void swap_sample_fmts(AVFilterGraph *graph) { int i; for (i = 0; i < graph->nb_filters; i++) swap_sample_fmts_on_filter(graph->filters[i]); } static int pick_formats(AVFilterGraph *graph) { int i, j, ret; int change; do{ change = 0; for (i = 0; i < graph->nb_filters; i++) { AVFilterContext *filter = graph->filters[i]; if (filter->nb_inputs){ for (j = 0; j < filter->nb_inputs; j++){ if (filter->inputs[j]->incfg.formats && filter->inputs[j]->incfg.formats->nb_formats == 1) { if ((ret = pick_format(filter->inputs[j], NULL)) < 0) return ret; change = 1; } } } if (filter->nb_outputs){ for (j = 0; j < filter->nb_outputs; j++){ if (filter->outputs[j]->incfg.formats && filter->outputs[j]->incfg.formats->nb_formats == 1) { if ((ret = pick_format(filter->outputs[j], NULL)) < 0) return ret; change = 1; } } } if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) { for (j = 0; j < filter->nb_outputs; j++) { if (filter->outputs[j]->format<0) { if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0) return ret; change = 1; } } } } }while(change); for (i = 0; i < graph->nb_filters; i++) { AVFilterContext *filter = graph->filters[i]; for (j = 0; j < filter->nb_inputs; j++) if ((ret = pick_format(filter->inputs[j], NULL)) < 0) return ret; for (j = 0; j < filter->nb_outputs; j++) if ((ret = pick_format(filter->outputs[j], NULL)) < 0) return ret; } return 0; } /** * Configure the formats of all the links in the graph. */ static int graph_config_formats(AVFilterGraph *graph, void *log_ctx) { int ret; /* find supported formats from sub-filters, and merge along links */ while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN)) av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n"); if (ret < 0) return ret; /* Once everything is merged, it's possible that we'll still have * multiple valid media format choices. We try to minimize the amount * of format conversion inside filters */ if ((ret = reduce_formats(graph)) < 0) return ret; /* for audio filters, ensure the best format, sample rate and channel layout * is selected */ swap_sample_fmts(graph); swap_samplerates(graph); swap_channel_layouts(graph); if ((ret = pick_formats(graph)) < 0) return ret; return 0; } static int graph_config_pointers(AVFilterGraph *graph, void *log_ctx) { unsigned i, j; int sink_links_count = 0, n = 0; AVFilterContext *f; AVFilterLink **sinks; for (i = 0; i < graph->nb_filters; i++) { f = graph->filters[i]; for (j = 0; j < f->nb_inputs; j++) { f->inputs[j]->graph = graph; f->inputs[j]->age_index = -1; } for (j = 0; j < f->nb_outputs; j++) { f->outputs[j]->graph = graph; f->outputs[j]->age_index= -1; } if (!f->nb_outputs) { if (f->nb_inputs > INT_MAX - sink_links_count) return AVERROR(EINVAL); sink_links_count += f->nb_inputs; } } sinks = av_calloc(sink_links_count, sizeof(*sinks)); if (!sinks) return AVERROR(ENOMEM); for (i = 0; i < graph->nb_filters; i++) { f = graph->filters[i]; if (!f->nb_outputs) { for (j = 0; j < f->nb_inputs; j++) { sinks[n] = f->inputs[j]; f->inputs[j]->age_index = n++; } } } av_assert0(n == sink_links_count); graph->sink_links = sinks; graph->sink_links_count = sink_links_count; return 0; } int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx) { int ret; if ((ret = graph_check_validity(graphctx, log_ctx))) return ret; if ((ret = graph_config_formats(graphctx, log_ctx))) return ret; if ((ret = graph_config_links(graphctx, log_ctx))) return ret; if ((ret = graph_check_links(graphctx, log_ctx))) return ret; if ((ret = graph_config_pointers(graphctx, log_ctx))) return ret; return 0; } int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags) { int i, r = AVERROR(ENOSYS); if (!graph) return r; if ((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) { r = avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST); if (r != AVERROR(ENOSYS)) return r; } if (res_len && res) res[0] = 0; for (i = 0; i < graph->nb_filters; i++) { AVFilterContext *filter = graph->filters[i]; if (!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)) { r = avfilter_process_command(filter, cmd, arg, res, res_len, flags); if (r != AVERROR(ENOSYS)) { if ((flags & AVFILTER_CMD_FLAG_ONE) || r < 0) return r; } } } return r; } int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts) { int i; if(!graph) return 0; for (i = 0; i < graph->nb_filters; i++) { AVFilterContext *filter = graph->filters[i]; if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){ AVFilterCommand **queue = &filter->command_queue, *next; while (*queue && (*queue)->time <= ts) queue = &(*queue)->next; next = *queue; *queue = av_mallocz(sizeof(AVFilterCommand)); if (!*queue) return AVERROR(ENOMEM); (*queue)->command = av_strdup(command); (*queue)->arg = av_strdup(arg); (*queue)->time = ts; (*queue)->flags = flags; (*queue)->next = next; if(flags & AVFILTER_CMD_FLAG_ONE) return 0; } } return 0; } static void heap_bubble_up(AVFilterGraph *graph, AVFilterLink *link, int index) { AVFilterLink **links = graph->sink_links; av_assert0(index >= 0); while (index) { int parent = (index - 1) >> 1; if (links[parent]->current_pts_us >= link->current_pts_us) break; links[index] = links[parent]; links[index]->age_index = index; index = parent; } links[index] = link; link->age_index = index; } static void heap_bubble_down(AVFilterGraph *graph, AVFilterLink *link, int index) { AVFilterLink **links = graph->sink_links; av_assert0(index >= 0); while (1) { int child = 2 * index + 1; if (child >= graph->sink_links_count) break; if (child + 1 < graph->sink_links_count && links[child + 1]->current_pts_us < links[child]->current_pts_us) child++; if (link->current_pts_us < links[child]->current_pts_us) break; links[index] = links[child]; links[index]->age_index = index; index = child; } links[index] = link; link->age_index = index; } void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link) { heap_bubble_up (graph, link, link->age_index); heap_bubble_down(graph, link, link->age_index); } int avfilter_graph_request_oldest(AVFilterGraph *graph) { AVFilterLink *oldest = graph->sink_links[0]; int64_t frame_count; int r; while (graph->sink_links_count) { oldest = graph->sink_links[0]; if (oldest->dst->filter->activate) { /* For now, buffersink is the only filter implementing activate. */ r = av_buffersink_get_frame_flags(oldest->dst, NULL, AV_BUFFERSINK_FLAG_PEEK); if (r != AVERROR_EOF) return r; } else { r = ff_request_frame(oldest); } if (r != AVERROR_EOF) break; av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n", oldest->dst->name, oldest->dstpad->name); /* EOF: remove the link from the heap */ if (oldest->age_index < --graph->sink_links_count) heap_bubble_down(graph, graph->sink_links[graph->sink_links_count], oldest->age_index); oldest->age_index = -1; } if (!graph->sink_links_count) return AVERROR_EOF; av_assert1(!oldest->dst->filter->activate); av_assert1(oldest->age_index >= 0); frame_count = oldest->frame_count_out; while (frame_count == oldest->frame_count_out) { r = ff_filter_graph_run_once(graph); if (r == AVERROR(EAGAIN) && !oldest->frame_wanted_out && !oldest->frame_blocked_in && !oldest->status_in) ff_request_frame(oldest); else if (r < 0) return r; } return 0; } int ff_filter_graph_run_once(AVFilterGraph *graph) { AVFilterContext *filter; unsigned i; av_assert0(graph->nb_filters); filter = graph->filters[0]; for (i = 1; i < graph->nb_filters; i++) if (graph->filters[i]->ready > filter->ready) filter = graph->filters[i]; if (!filter->ready) return AVERROR(EAGAIN); return ff_filter_activate(filter); }