/* * 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/avstring.h" #include "libavutil/bprint.h" #include "libavutil/channel_layout.h" #include "libavutil/internal.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "avfilter.h" #include "formats.h" #include "internal.h" #include "thread.h" #define OFFSET(x) offsetof(AVFilterGraph, x) #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_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, FLAGS, "thread_type" }, { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" }, { "threads", "Maximum number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, { 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); return ret; } void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter) { int i; 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--; 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_freep(&(*graph)->scale_sws_opts); av_freep(&(*graph)->aresample_swr_opts); av_freep(&(*graph)->resample_lavr_opts); av_freep(&(*graph)->filters); av_freep(&(*graph)->internal); av_freep(graph); } #if FF_API_AVFILTER_OPEN int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) { AVFilterContext **filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1)); if (!filters) return AVERROR(ENOMEM); graph->filters = filters; graph->filters[graph->nb_filters++] = filter; #if FF_API_FOO_COUNT FF_DISABLE_DEPRECATION_WARNINGS graph->filter_count_unused = graph->nb_filters; FF_ENABLE_DEPRECATION_WARNINGS #endif filter->graph = graph; return 0; } #endif 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: if (*filt_ctx) 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.\n"); return NULL; } } } s = ff_filter_alloc(filter, name); if (!s) return NULL; filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1)); if (!filters) { avfilter_free(s); return NULL; } graph->filters = filters; graph->filters[graph->nb_filters++] = s; #if FF_API_FOO_COUNT FF_DISABLE_DEPRECATION_WARNINGS graph->filter_count_unused = graph->nb_filters; FF_ENABLE_DEPRECATION_WARNINGS #endif 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, AVClass *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, AVClass *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; } 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 void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l) { if (!l) return; if (l->nb_channel_layouts) { if (l->all_layouts || l->all_counts) av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n"); l->all_layouts = l->all_counts = 0; } else { if (l->all_counts && !l->all_layouts) av_log(log, AV_LOG_WARNING, "All counts without all layouts\n"); l->all_layouts = 1; } } static int filter_query_formats(AVFilterContext *ctx) { int ret, i; AVFilterFormats *formats; AVFilterChannelLayouts *chlayouts; AVFilterFormats *samplerates; 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->query_formats(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; } for (i = 0; i < ctx->nb_inputs; i++) sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts); for (i = 0; i < ctx->nb_outputs; i++) sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts); formats = ff_all_formats(type); if (!formats) return AVERROR(ENOMEM); ff_set_common_formats(ctx, formats); if (type == AVMEDIA_TYPE_AUDIO) { samplerates = ff_all_samplerates(); if (!samplerates) return AVERROR(ENOMEM); ff_set_common_samplerates(ctx, samplerates); chlayouts = ff_all_channel_layouts(); if (!chlayouts) return AVERROR(ENOMEM); ff_set_common_channel_layouts(ctx, chlayouts); } return 0; } static int formats_declared(AVFilterContext *f) { int i; for (i = 0; i < f->nb_inputs; i++) { if (!f->inputs[i]->out_formats) return 0; if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO && !(f->inputs[i]->out_samplerates && f->inputs[i]->out_channel_layouts)) return 0; } for (i = 0; i < f->nb_outputs; i++) { if (!f->outputs[i]->in_formats) return 0; if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO && !(f->outputs[i]->in_samplerates && f->outputs[i]->in_channel_layouts)) return 0; } return 1; } static AVFilterFormats *clone_filter_formats(AVFilterFormats *arg) { AVFilterFormats *a = av_memdup(arg, sizeof(*arg)); if (a) { a->refcount = 0; a->refs = NULL; a->formats = av_memdup(a->formats, sizeof(*a->formats) * a->nb_formats); if (!a->formats && arg->formats) av_freep(&a); } return a; } static int can_merge_formats(AVFilterFormats *a_arg, AVFilterFormats *b_arg, enum AVMediaType type, int is_sample_rate) { AVFilterFormats *a, *b, *ret; if (a_arg == b_arg) return 1; a = clone_filter_formats(a_arg); b = clone_filter_formats(b_arg); if (!a || !b) { if (a) av_freep(&a->formats); if (b) av_freep(&b->formats); av_freep(&a); av_freep(&b); return 0; } if (is_sample_rate) { ret = ff_merge_samplerates(a, b); } else { ret = ff_merge_formats(a, b, type); } if (ret) { av_freep(&ret->formats); av_freep(&ret->refs); av_freep(&ret); return 1; } else { av_freep(&a->formats); av_freep(&b->formats); av_freep(&a); av_freep(&b); return 0; } } /** * 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, AVClass *log_ctx) { int i, j, ret; int scaler_count = 0, resampler_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->query_formats) 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]; int convert_needed = 0; if (!link) continue; if (link->in_formats != link->out_formats && link->in_formats && link->out_formats) if (!can_merge_formats(link->in_formats, link->out_formats, link->type, 0)) convert_needed = 1; if (link->type == AVMEDIA_TYPE_AUDIO) { if (link->in_samplerates != link->out_samplerates && link->in_samplerates && link->out_samplerates) if (!can_merge_formats(link->in_samplerates, link->out_samplerates, 0, 1)) convert_needed = 1; } #define MERGE_DISPATCH(field, statement) \ if (!(link->in_ ## field && link->out_ ## field)) { \ count_delayed++; \ } else if (link->in_ ## field == link->out_ ## field) { \ count_already_merged++; \ } else if (!convert_needed) { \ count_merged++; \ statement \ } if (link->type == AVMEDIA_TYPE_AUDIO) { MERGE_DISPATCH(channel_layouts, if (!ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)) convert_needed = 1; ) MERGE_DISPATCH(samplerates, if (!ff_merge_samplerates(link->in_samplerates, link->out_samplerates)) convert_needed = 1; ) } MERGE_DISPATCH(formats, if (!ff_merge_formats(link->in_formats, link->out_formats, link->type)) convert_needed = 1; ) #undef MERGE_DISPATCH if (convert_needed) { AVFilterContext *convert; AVFilter *filter; AVFilterLink *inlink, *outlink; char scale_args[256]; char inst_name[30]; /* couldn't merge format lists. auto-insert conversion filter */ switch (link->type) { case AVMEDIA_TYPE_VIDEO: if (!(filter = avfilter_get_by_name("scale"))) { av_log(log_ctx, AV_LOG_ERROR, "'scale' filter " "not present, cannot convert pixel formats.\n"); return AVERROR(EINVAL); } snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d", scaler_count++); if ((ret = avfilter_graph_create_filter(&convert, filter, inst_name, graph->scale_sws_opts, NULL, graph)) < 0) return ret; break; case AVMEDIA_TYPE_AUDIO: if (!(filter = avfilter_get_by_name("aresample"))) { av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter " "not present, cannot convert audio formats.\n"); return AVERROR(EINVAL); } snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d", resampler_count++); scale_args[0] = '\0'; if (graph->aresample_swr_opts) snprintf(scale_args, sizeof(scale_args), "%s", graph->aresample_swr_opts); if ((ret = avfilter_graph_create_filter(&convert, filter, inst_name, graph->aresample_swr_opts, NULL, graph)) < 0) return ret; break; default: return AVERROR(EINVAL); } if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0) return ret; filter_query_formats(convert); inlink = convert->inputs[0]; outlink = convert->outputs[0]; if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) || !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type)) ret |= AVERROR(ENOSYS); if (inlink->type == AVMEDIA_TYPE_AUDIO && (!ff_merge_samplerates(inlink->in_samplerates, inlink->out_samplerates) || !ff_merge_channel_layouts(inlink->in_channel_layouts, inlink->out_channel_layouts))) ret |= AVERROR(ENOSYS); if (outlink->type == AVMEDIA_TYPE_AUDIO && (!ff_merge_samplerates(outlink->in_samplerates, outlink->out_samplerates) || !ff_merge_channel_layouts(outlink->in_channel_layouts, outlink->out_channel_layouts))) ret |= AVERROR(ENOSYS); if (ret < 0) { 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 ret; } } } } 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 pick_format(AVFilterLink *link, AVFilterLink *ref) { if (!link || !link->in_formats) return 0; if (link->type == AVMEDIA_TYPE_VIDEO) { if(ref && ref->type == AVMEDIA_TYPE_VIDEO){ 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->in_formats->nb_formats; i++) { enum AVPixelFormat p = link->in_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->in_formats->nb_formats, av_get_pix_fmt_name(ref->format), has_alpha); link->in_formats->formats[0] = best; } } link->in_formats->nb_formats = 1; link->format = link->in_formats->formats[0]; if (link->type == AVMEDIA_TYPE_AUDIO) { if (!link->in_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->in_samplerates->nb_formats = 1; link->sample_rate = link->in_samplerates->formats[0]; if (link->in_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->in_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->in_channel_layouts->nb_channel_layouts = 1; link->channel_layout = link->in_channel_layouts->channel_layouts[0]; if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout))) link->channel_layout = 0; else link->channels = av_get_channel_layout_nb_channels(link->channel_layout); } ff_formats_unref(&link->in_formats); ff_formats_unref(&link->out_formats); ff_formats_unref(&link->in_samplerates); ff_formats_unref(&link->out_samplerates); ff_channel_layouts_unref(&link->in_channel_layouts); ff_channel_layouts_unref(&link->out_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->out_ ## list || link->out_ ## list->nb != 1) \ continue; \ fmt = link->out_ ## 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->in_ ## list->nb == 1) \ continue; \ fmts = out_link->in_ ## list; \ \ if (!out_link->in_ ## list->nb) { \ add_format(&out_link->in_ ##list, fmt); \ ret = 1; \ break; \ } \ \ for (k = 0; k < out_link->in_ ## 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]; uint64_t fmt; if (!inlink->out_channel_layouts || inlink->out_channel_layouts->nb_channel_layouts != 1) continue; fmt = inlink->out_channel_layouts->channel_layouts[0]; for (j = 0; j < filter->nb_outputs; j++) { AVFilterLink *outlink = filter->outputs[j]; AVFilterChannelLayouts *fmts; fmts = outlink->in_channel_layouts; if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1) continue; if (fmts->all_layouts && (!FF_LAYOUT2COUNT(fmt) || fmts->all_counts)) { /* Turn the infinite list into a singleton */ fmts->all_layouts = fmts->all_counts = 0; ff_add_channel_layout(&outlink->in_channel_layouts, fmt); break; } for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) { if (fmts->channel_layouts[k] == fmt) { fmts->channel_layouts[0] = fmt; fmts->nb_channel_layouts = 1; ret = 1; break; } } } } return ret; } static void reduce_formats(AVFilterGraph *graph) { int i, reduced; do { reduced = 0; for (i = 0; i < graph->nb_filters; i++) reduced |= reduce_formats_on_filter(graph->filters[i]); } while (reduced); } 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->out_samplerates->nb_formats== 1) break; } if (i == filter->nb_inputs) return; sample_rate = link->out_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->in_samplerates->nb_formats < 2) continue; for (j = 0; j < outlink->in_samplerates->nb_formats; j++) { int diff = abs(sample_rate - outlink->in_samplerates->formats[j]); if (diff < best_diff) { best_diff = diff; best_idx = j; } } FFSWAP(int, outlink->in_samplerates->formats[0], outlink->in_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->out_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->in_channel_layouts->nb_channel_layouts < 2) continue; for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) { uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0]; uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j]; int in_channels = av_get_channel_layout_nb_channels(in_chlayout); int out_channels = av_get_channel_layout_nb_channels(out_chlayout); int count_diff = out_channels - in_channels; int matched_channels, extra_channels; int score = 100000; if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(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 (FF_LAYOUT2COUNT(in_chlayout)) in_channels = FF_LAYOUT2COUNT(in_chlayout); if (FF_LAYOUT2COUNT(out_chlayout)) out_channels = FF_LAYOUT2COUNT(out_chlayout); score -= 10000 + FFABS(out_channels - in_channels) + (in_channels > out_channels ? 10000 : 0); in_chlayout = out_chlayout = 0; /* 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 (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) && (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) { in_chlayout &= ~cmp0; out_chlayout &= ~cmp1; /* add score for channel match, minus a deduction for having to do the substitution */ score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2; } } /* no penalty for LFE channel mismatch */ if ( (in_chlayout & AV_CH_LOW_FREQUENCY) && (out_chlayout & AV_CH_LOW_FREQUENCY)) score += 10; in_chlayout &= ~AV_CH_LOW_FREQUENCY; out_chlayout &= ~AV_CH_LOW_FREQUENCY; matched_channels = av_get_channel_layout_nb_channels(in_chlayout & out_chlayout); extra_channels = av_get_channel_layout_nb_channels(out_chlayout & (~in_chlayout)); 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(uint64_t, outlink->in_channel_layouts->channel_layouts[0], outlink->in_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->out_formats->nb_formats == 1) break; } if (i == filter->nb_inputs) return; format = link->out_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->in_formats->nb_formats < 2) continue; for (j = 0; j < outlink->in_formats->nb_formats; j++) { int out_format = outlink->in_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->in_formats->formats[0], outlink->in_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]->in_formats && filter->inputs[j]->in_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]->in_formats && filter->outputs[j]->in_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, AVClass *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 */ reduce_formats(graph); /* 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 ff_avfilter_graph_config_pointers(AVFilterGraph *graph, AVClass *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; } static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx) { AVFilterContext *f; int i, j, ret; int fifo_count = 0; for (i = 0; i < graph->nb_filters; i++) { f = graph->filters[i]; for (j = 0; j < f->nb_inputs; j++) { AVFilterLink *link = f->inputs[j]; AVFilterContext *fifo_ctx; AVFilter *fifo; char name[32]; if (!link->dstpad->needs_fifo) continue; fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ? avfilter_get_by_name("fifo") : avfilter_get_by_name("afifo"); snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++); ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL, NULL, graph); if (ret < 0) return ret; ret = avfilter_insert_filter(link, fifo_ctx, 0, 0); if (ret < 0) return ret; } } 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_insert_fifos(graphctx, log_ctx)) < 0) return ret; if ((ret = graph_config_formats(graphctx, log_ctx))) return ret; if ((ret = graph_config_links(graphctx, log_ctx))) return ret; if ((ret = ff_avfilter_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)); (*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; while (index) { int parent = (index - 1) >> 1; if (links[parent]->current_pts >= link->current_pts) 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; 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 < links[child]->current_pts) child++; if (link->current_pts < links[child]->current_pts) 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) { while (graph->sink_links_count) { AVFilterLink *oldest = graph->sink_links[0]; int r = ff_request_frame(oldest); if (r != AVERROR_EOF) return r; av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n", oldest->dst ? oldest->dst->name : "unknown", oldest->dstpad ? oldest->dstpad->name : "unknown"); /* 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; } return AVERROR_EOF; }