yading@10: /* yading@10: * filter graphs yading@10: * Copyright (c) 2008 Vitor Sessak yading@10: * Copyright (c) 2007 Bobby Bingham yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #include yading@10: yading@10: #include "libavutil/avassert.h" yading@10: #include "libavutil/avstring.h" yading@10: #include "libavutil/bprint.h" yading@10: #include "libavutil/channel_layout.h" yading@10: #include "libavutil/opt.h" yading@10: #include "libavutil/pixdesc.h" yading@10: #include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2() yading@10: #include "avfilter.h" yading@10: #include "formats.h" yading@10: #include "internal.h" yading@10: yading@10: #define OFFSET(x) offsetof(AVFilterGraph,x) yading@10: yading@10: static const AVOption options[]={ yading@10: {"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, yading@10: {"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, yading@10: {0} yading@10: }; yading@10: yading@10: yading@10: static const AVClass filtergraph_class = { yading@10: .class_name = "AVFilterGraph", yading@10: .item_name = av_default_item_name, yading@10: .option = options, yading@10: .version = LIBAVUTIL_VERSION_INT, yading@10: .category = AV_CLASS_CATEGORY_FILTER, yading@10: }; yading@10: yading@10: AVFilterGraph *avfilter_graph_alloc(void) yading@10: { yading@10: AVFilterGraph *ret = av_mallocz(sizeof(*ret)); yading@10: if (!ret) yading@10: return NULL; yading@10: ret->av_class = &filtergraph_class; yading@10: return ret; yading@10: } yading@10: yading@10: void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter) yading@10: { yading@10: int i; yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: if (graph->filters[i] == filter) { yading@10: FFSWAP(AVFilterContext*, graph->filters[i], yading@10: graph->filters[graph->nb_filters - 1]); yading@10: graph->nb_filters--; yading@10: return; yading@10: } yading@10: } yading@10: } yading@10: yading@10: void avfilter_graph_free(AVFilterGraph **graph) yading@10: { yading@10: if (!*graph) yading@10: return; yading@10: yading@10: while ((*graph)->nb_filters) yading@10: avfilter_free((*graph)->filters[0]); yading@10: yading@10: av_freep(&(*graph)->sink_links); yading@10: av_freep(&(*graph)->scale_sws_opts); yading@10: av_freep(&(*graph)->aresample_swr_opts); yading@10: av_freep(&(*graph)->resample_lavr_opts); yading@10: av_freep(&(*graph)->filters); yading@10: av_freep(graph); yading@10: } yading@10: yading@10: #if FF_API_AVFILTER_OPEN yading@10: int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) yading@10: { yading@10: AVFilterContext **filters = av_realloc(graph->filters, yading@10: sizeof(*filters) * (graph->nb_filters + 1)); yading@10: if (!filters) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: graph->filters = filters; yading@10: graph->filters[graph->nb_filters++] = filter; yading@10: yading@10: #if FF_API_FOO_COUNT yading@10: graph->filter_count_unused = graph->nb_filters; yading@10: #endif yading@10: yading@10: filter->graph = graph; yading@10: yading@10: return 0; yading@10: } yading@10: #endif yading@10: yading@10: int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt, yading@10: const char *name, const char *args, void *opaque, yading@10: AVFilterGraph *graph_ctx) yading@10: { yading@10: int ret; yading@10: yading@10: *filt_ctx = avfilter_graph_alloc_filter(graph_ctx, filt, name); yading@10: if (!*filt_ctx) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: ret = avfilter_init_str(*filt_ctx, args); yading@10: if (ret < 0) yading@10: goto fail; yading@10: yading@10: return 0; yading@10: yading@10: fail: yading@10: if (*filt_ctx) yading@10: avfilter_free(*filt_ctx); yading@10: *filt_ctx = NULL; yading@10: return ret; yading@10: } yading@10: yading@10: void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags) yading@10: { yading@10: graph->disable_auto_convert = flags; yading@10: } yading@10: yading@10: AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph, yading@10: const AVFilter *filter, yading@10: const char *name) yading@10: { yading@10: AVFilterContext **filters, *s; yading@10: yading@10: s = ff_filter_alloc(filter, name); yading@10: if (!s) yading@10: return NULL; yading@10: yading@10: filters = av_realloc(graph->filters, sizeof(*filters) * (graph->nb_filters + 1)); yading@10: if (!filters) { yading@10: avfilter_free(s); yading@10: return NULL; yading@10: } yading@10: yading@10: graph->filters = filters; yading@10: graph->filters[graph->nb_filters++] = s; yading@10: yading@10: #if FF_API_FOO_COUNT yading@10: graph->filter_count_unused = graph->nb_filters; yading@10: #endif yading@10: yading@10: s->graph = graph; yading@10: yading@10: return s; yading@10: } yading@10: yading@10: /** yading@10: * Check for the validity of graph. yading@10: * yading@10: * A graph is considered valid if all its input and output pads are yading@10: * connected. yading@10: * yading@10: * @return 0 in case of success, a negative value otherwise yading@10: */ yading@10: static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx) yading@10: { yading@10: AVFilterContext *filt; yading@10: int i, j; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: const AVFilterPad *pad; yading@10: filt = graph->filters[i]; yading@10: yading@10: for (j = 0; j < filt->nb_inputs; j++) { yading@10: if (!filt->inputs[j] || !filt->inputs[j]->src) { yading@10: pad = &filt->input_pads[j]; yading@10: av_log(log_ctx, AV_LOG_ERROR, yading@10: "Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n", yading@10: pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: } yading@10: yading@10: for (j = 0; j < filt->nb_outputs; j++) { yading@10: if (!filt->outputs[j] || !filt->outputs[j]->dst) { yading@10: pad = &filt->output_pads[j]; yading@10: av_log(log_ctx, AV_LOG_ERROR, yading@10: "Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n", yading@10: pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Configure all the links of graphctx. yading@10: * yading@10: * @return 0 in case of success, a negative value otherwise yading@10: */ yading@10: static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx) yading@10: { yading@10: AVFilterContext *filt; yading@10: int i, ret; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: filt = graph->filters[i]; yading@10: yading@10: if (!filt->nb_outputs) { yading@10: if ((ret = avfilter_config_links(filt))) yading@10: return ret; yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) yading@10: if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name)) yading@10: return graph->filters[i]; yading@10: yading@10: return NULL; yading@10: } yading@10: yading@10: static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l) yading@10: { yading@10: if (!l) yading@10: return; yading@10: if (l->nb_channel_layouts) { yading@10: if (l->all_layouts || l->all_counts) yading@10: av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n"); yading@10: l->all_layouts = l->all_counts = 0; yading@10: } else { yading@10: if (l->all_counts && !l->all_layouts) yading@10: av_log(log, AV_LOG_WARNING, "All counts without all layouts\n"); yading@10: l->all_layouts = 1; yading@10: } yading@10: } yading@10: yading@10: static int filter_query_formats(AVFilterContext *ctx) yading@10: { yading@10: int ret, i; yading@10: AVFilterFormats *formats; yading@10: AVFilterChannelLayouts *chlayouts; yading@10: AVFilterFormats *samplerates; yading@10: enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type : yading@10: ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type : yading@10: AVMEDIA_TYPE_VIDEO; yading@10: yading@10: if ((ret = ctx->filter->query_formats(ctx)) < 0) { yading@10: if (ret != AVERROR(EAGAIN)) yading@10: av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n", yading@10: ctx->name, av_err2str(ret)); yading@10: return ret; yading@10: } yading@10: yading@10: for (i = 0; i < ctx->nb_inputs; i++) yading@10: sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts); yading@10: for (i = 0; i < ctx->nb_outputs; i++) yading@10: sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts); yading@10: yading@10: formats = ff_all_formats(type); yading@10: if (!formats) yading@10: return AVERROR(ENOMEM); yading@10: ff_set_common_formats(ctx, formats); yading@10: if (type == AVMEDIA_TYPE_AUDIO) { yading@10: samplerates = ff_all_samplerates(); yading@10: if (!samplerates) yading@10: return AVERROR(ENOMEM); yading@10: ff_set_common_samplerates(ctx, samplerates); yading@10: chlayouts = ff_all_channel_layouts(); yading@10: if (!chlayouts) yading@10: return AVERROR(ENOMEM); yading@10: ff_set_common_channel_layouts(ctx, chlayouts); yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static int formats_declared(AVFilterContext *f) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < f->nb_inputs; i++) { yading@10: if (!f->inputs[i]->out_formats) yading@10: return 0; yading@10: if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO && yading@10: !(f->inputs[i]->out_samplerates && yading@10: f->inputs[i]->out_channel_layouts)) yading@10: return 0; yading@10: } yading@10: for (i = 0; i < f->nb_outputs; i++) { yading@10: if (!f->outputs[i]->in_formats) yading@10: return 0; yading@10: if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO && yading@10: !(f->outputs[i]->in_samplerates && yading@10: f->outputs[i]->in_channel_layouts)) yading@10: return 0; yading@10: } yading@10: return 1; yading@10: } yading@10: yading@10: static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) yading@10: { yading@10: int i, j, ret; yading@10: int scaler_count = 0, resampler_count = 0; yading@10: int count_queried = 0, count_merged = 0, count_already_merged = 0, yading@10: count_delayed = 0; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: AVFilterContext *f = graph->filters[i]; yading@10: if (formats_declared(f)) yading@10: continue; yading@10: if (f->filter->query_formats) yading@10: ret = filter_query_formats(f); yading@10: else yading@10: ret = ff_default_query_formats(f); yading@10: if (ret < 0 && ret != AVERROR(EAGAIN)) yading@10: return ret; yading@10: count_queried++; yading@10: } yading@10: yading@10: /* go through and merge as many format lists as possible */ yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: AVFilterContext *filter = graph->filters[i]; yading@10: yading@10: for (j = 0; j < filter->nb_inputs; j++) { yading@10: AVFilterLink *link = filter->inputs[j]; yading@10: int convert_needed = 0; yading@10: yading@10: if (!link) yading@10: continue; yading@10: yading@10: #define MERGE_DISPATCH(field, statement) \ yading@10: if (!(link->in_ ## field && link->out_ ## field)) { \ yading@10: count_delayed++; \ yading@10: } else if (link->in_ ## field == link->out_ ## field) { \ yading@10: count_already_merged++; \ yading@10: } else { \ yading@10: count_merged++; \ yading@10: statement \ yading@10: } yading@10: MERGE_DISPATCH(formats, yading@10: if (!ff_merge_formats(link->in_formats, link->out_formats, yading@10: link->type)) yading@10: convert_needed = 1; yading@10: ) yading@10: if (link->type == AVMEDIA_TYPE_AUDIO) { yading@10: MERGE_DISPATCH(channel_layouts, yading@10: if (!ff_merge_channel_layouts(link->in_channel_layouts, yading@10: link->out_channel_layouts)) yading@10: convert_needed = 1; yading@10: ) yading@10: MERGE_DISPATCH(samplerates, yading@10: if (!ff_merge_samplerates(link->in_samplerates, yading@10: link->out_samplerates)) yading@10: convert_needed = 1; yading@10: ) yading@10: } yading@10: #undef MERGE_DISPATCH yading@10: yading@10: if (convert_needed) { yading@10: AVFilterContext *convert; yading@10: AVFilter *filter; yading@10: AVFilterLink *inlink, *outlink; yading@10: char scale_args[256]; yading@10: char inst_name[30]; yading@10: yading@10: /* couldn't merge format lists. auto-insert conversion filter */ yading@10: switch (link->type) { yading@10: case AVMEDIA_TYPE_VIDEO: yading@10: if (!(filter = avfilter_get_by_name("scale"))) { yading@10: av_log(log_ctx, AV_LOG_ERROR, "'scale' filter " yading@10: "not present, cannot convert pixel formats.\n"); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: yading@10: snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d", yading@10: scaler_count++); yading@10: av_strlcpy(scale_args, "0:0", sizeof(scale_args)); yading@10: if (graph->scale_sws_opts) { yading@10: av_strlcat(scale_args, ":", sizeof(scale_args)); yading@10: av_strlcat(scale_args, graph->scale_sws_opts, sizeof(scale_args)); yading@10: } yading@10: if ((ret = avfilter_graph_create_filter(&convert, filter, yading@10: inst_name, scale_args, NULL, yading@10: graph)) < 0) yading@10: return ret; yading@10: break; yading@10: case AVMEDIA_TYPE_AUDIO: yading@10: if (!(filter = avfilter_get_by_name("aresample"))) { yading@10: av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter " yading@10: "not present, cannot convert audio formats.\n"); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: yading@10: snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d", yading@10: resampler_count++); yading@10: scale_args[0] = '\0'; yading@10: if (graph->aresample_swr_opts) yading@10: snprintf(scale_args, sizeof(scale_args), "%s", yading@10: graph->aresample_swr_opts); yading@10: if ((ret = avfilter_graph_create_filter(&convert, filter, yading@10: inst_name, graph->aresample_swr_opts, yading@10: NULL, graph)) < 0) yading@10: return ret; yading@10: break; yading@10: default: yading@10: return AVERROR(EINVAL); yading@10: } yading@10: yading@10: if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0) yading@10: return ret; yading@10: yading@10: filter_query_formats(convert); yading@10: inlink = convert->inputs[0]; yading@10: outlink = convert->outputs[0]; yading@10: if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) || yading@10: !ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type)) yading@10: ret |= AVERROR(ENOSYS); yading@10: if (inlink->type == AVMEDIA_TYPE_AUDIO && yading@10: (!ff_merge_samplerates(inlink->in_samplerates, yading@10: inlink->out_samplerates) || yading@10: !ff_merge_channel_layouts(inlink->in_channel_layouts, yading@10: inlink->out_channel_layouts))) yading@10: ret |= AVERROR(ENOSYS); yading@10: if (outlink->type == AVMEDIA_TYPE_AUDIO && yading@10: (!ff_merge_samplerates(outlink->in_samplerates, yading@10: outlink->out_samplerates) || yading@10: !ff_merge_channel_layouts(outlink->in_channel_layouts, yading@10: outlink->out_channel_layouts))) yading@10: ret |= AVERROR(ENOSYS); yading@10: yading@10: if (ret < 0) { yading@10: av_log(log_ctx, AV_LOG_ERROR, yading@10: "Impossible to convert between the formats supported by the filter " yading@10: "'%s' and the filter '%s'\n", link->src->name, link->dst->name); yading@10: return ret; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: av_log(graph, AV_LOG_DEBUG, "query_formats: " yading@10: "%d queried, %d merged, %d already done, %d delayed\n", yading@10: count_queried, count_merged, count_already_merged, count_delayed); yading@10: if (count_delayed) { yading@10: AVBPrint bp; yading@10: yading@10: if (count_queried || count_merged) yading@10: return AVERROR(EAGAIN); yading@10: av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC); yading@10: for (i = 0; i < graph->nb_filters; i++) yading@10: if (!formats_declared(graph->filters[i])) yading@10: av_bprintf(&bp, "%s%s", bp.len ? ", " : "", yading@10: graph->filters[i]->name); yading@10: av_log(graph, AV_LOG_ERROR, yading@10: "The following filters could not choose their formats: %s\n" yading@10: "Consider inserting the (a)format filter near their input or " yading@10: "output.\n", bp.str); yading@10: return AVERROR(EIO); yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static int pick_format(AVFilterLink *link, AVFilterLink *ref) yading@10: { yading@10: if (!link || !link->in_formats) yading@10: return 0; yading@10: yading@10: if (link->type == AVMEDIA_TYPE_VIDEO) { yading@10: if(ref && ref->type == AVMEDIA_TYPE_VIDEO){ yading@10: int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0; yading@10: enum AVPixelFormat best= AV_PIX_FMT_NONE; yading@10: int i; yading@10: for (i=0; iin_formats->format_count; i++) { yading@10: enum AVPixelFormat p = link->in_formats->formats[i]; yading@10: best= avcodec_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL); yading@10: } yading@10: av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n", yading@10: av_get_pix_fmt_name(best), link->in_formats->format_count, yading@10: av_get_pix_fmt_name(ref->format), has_alpha); yading@10: link->in_formats->formats[0] = best; yading@10: } yading@10: } yading@10: yading@10: link->in_formats->format_count = 1; yading@10: link->format = link->in_formats->formats[0]; yading@10: yading@10: if (link->type == AVMEDIA_TYPE_AUDIO) { yading@10: if (!link->in_samplerates->format_count) { yading@10: av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for" yading@10: " the link between filters %s and %s.\n", link->src->name, yading@10: link->dst->name); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: link->in_samplerates->format_count = 1; yading@10: link->sample_rate = link->in_samplerates->formats[0]; yading@10: yading@10: if (link->in_channel_layouts->all_layouts) { yading@10: av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for" yading@10: " the link between filters %s and %s.\n", link->src->name, yading@10: link->dst->name); yading@10: return AVERROR(EINVAL); yading@10: } yading@10: link->in_channel_layouts->nb_channel_layouts = 1; yading@10: link->channel_layout = link->in_channel_layouts->channel_layouts[0]; yading@10: if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout))) yading@10: link->channel_layout = 0; yading@10: else yading@10: link->channels = av_get_channel_layout_nb_channels(link->channel_layout); yading@10: } yading@10: yading@10: ff_formats_unref(&link->in_formats); yading@10: ff_formats_unref(&link->out_formats); yading@10: ff_formats_unref(&link->in_samplerates); yading@10: ff_formats_unref(&link->out_samplerates); yading@10: ff_channel_layouts_unref(&link->in_channel_layouts); yading@10: ff_channel_layouts_unref(&link->out_channel_layouts); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \ yading@10: do { \ yading@10: for (i = 0; i < filter->nb_inputs; i++) { \ yading@10: AVFilterLink *link = filter->inputs[i]; \ yading@10: fmt_type fmt; \ yading@10: \ yading@10: if (!link->out_ ## list || link->out_ ## list->nb != 1) \ yading@10: continue; \ yading@10: fmt = link->out_ ## list->var[0]; \ yading@10: \ yading@10: for (j = 0; j < filter->nb_outputs; j++) { \ yading@10: AVFilterLink *out_link = filter->outputs[j]; \ yading@10: list_type *fmts; \ yading@10: \ yading@10: if (link->type != out_link->type || \ yading@10: out_link->in_ ## list->nb == 1) \ yading@10: continue; \ yading@10: fmts = out_link->in_ ## list; \ yading@10: \ yading@10: if (!out_link->in_ ## list->nb) { \ yading@10: add_format(&out_link->in_ ##list, fmt); \ yading@10: break; \ yading@10: } \ yading@10: \ yading@10: for (k = 0; k < out_link->in_ ## list->nb; k++) \ yading@10: if (fmts->var[k] == fmt) { \ yading@10: fmts->var[0] = fmt; \ yading@10: fmts->nb = 1; \ yading@10: ret = 1; \ yading@10: break; \ yading@10: } \ yading@10: } \ yading@10: } \ yading@10: } while (0) yading@10: yading@10: static int reduce_formats_on_filter(AVFilterContext *filter) yading@10: { yading@10: int i, j, k, ret = 0; yading@10: yading@10: REDUCE_FORMATS(int, AVFilterFormats, formats, formats, yading@10: format_count, ff_add_format); yading@10: REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats, yading@10: format_count, ff_add_format); yading@10: yading@10: /* reduce channel layouts */ yading@10: for (i = 0; i < filter->nb_inputs; i++) { yading@10: AVFilterLink *inlink = filter->inputs[i]; yading@10: uint64_t fmt; yading@10: yading@10: if (!inlink->out_channel_layouts || yading@10: inlink->out_channel_layouts->nb_channel_layouts != 1) yading@10: continue; yading@10: fmt = inlink->out_channel_layouts->channel_layouts[0]; yading@10: yading@10: for (j = 0; j < filter->nb_outputs; j++) { yading@10: AVFilterLink *outlink = filter->outputs[j]; yading@10: AVFilterChannelLayouts *fmts; yading@10: yading@10: fmts = outlink->in_channel_layouts; yading@10: if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1) yading@10: continue; yading@10: yading@10: if (fmts->all_layouts) { yading@10: /* Turn the infinite list into a singleton */ yading@10: fmts->all_layouts = fmts->all_counts = 0; yading@10: ff_add_channel_layout(&outlink->in_channel_layouts, fmt); yading@10: break; yading@10: } yading@10: yading@10: for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) { yading@10: if (fmts->channel_layouts[k] == fmt) { yading@10: fmts->channel_layouts[0] = fmt; yading@10: fmts->nb_channel_layouts = 1; yading@10: ret = 1; yading@10: break; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: return ret; yading@10: } yading@10: yading@10: static void reduce_formats(AVFilterGraph *graph) yading@10: { yading@10: int i, reduced; yading@10: yading@10: do { yading@10: reduced = 0; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) yading@10: reduced |= reduce_formats_on_filter(graph->filters[i]); yading@10: } while (reduced); yading@10: } yading@10: yading@10: static void swap_samplerates_on_filter(AVFilterContext *filter) yading@10: { yading@10: AVFilterLink *link = NULL; yading@10: int sample_rate; yading@10: int i, j; yading@10: yading@10: for (i = 0; i < filter->nb_inputs; i++) { yading@10: link = filter->inputs[i]; yading@10: yading@10: if (link->type == AVMEDIA_TYPE_AUDIO && yading@10: link->out_samplerates->format_count == 1) yading@10: break; yading@10: } yading@10: if (i == filter->nb_inputs) yading@10: return; yading@10: yading@10: sample_rate = link->out_samplerates->formats[0]; yading@10: yading@10: for (i = 0; i < filter->nb_outputs; i++) { yading@10: AVFilterLink *outlink = filter->outputs[i]; yading@10: int best_idx, best_diff = INT_MAX; yading@10: yading@10: if (outlink->type != AVMEDIA_TYPE_AUDIO || yading@10: outlink->in_samplerates->format_count < 2) yading@10: continue; yading@10: yading@10: for (j = 0; j < outlink->in_samplerates->format_count; j++) { yading@10: int diff = abs(sample_rate - outlink->in_samplerates->formats[j]); yading@10: yading@10: if (diff < best_diff) { yading@10: best_diff = diff; yading@10: best_idx = j; yading@10: } yading@10: } yading@10: FFSWAP(int, outlink->in_samplerates->formats[0], yading@10: outlink->in_samplerates->formats[best_idx]); yading@10: } yading@10: } yading@10: yading@10: static void swap_samplerates(AVFilterGraph *graph) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) yading@10: swap_samplerates_on_filter(graph->filters[i]); yading@10: } yading@10: yading@10: #define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER) yading@10: #define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT) yading@10: #define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT) yading@10: #define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT) yading@10: #define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT) yading@10: #define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT) yading@10: #define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT) yading@10: yading@10: /* allowable substitutions for channel pairs when comparing layouts, yading@10: * ordered by priority for both values */ yading@10: static const uint64_t ch_subst[][2] = { yading@10: { CH_FRONT_PAIR, CH_CENTER_PAIR }, yading@10: { CH_FRONT_PAIR, CH_WIDE_PAIR }, yading@10: { CH_FRONT_PAIR, AV_CH_FRONT_CENTER }, yading@10: { CH_CENTER_PAIR, CH_FRONT_PAIR }, yading@10: { CH_CENTER_PAIR, CH_WIDE_PAIR }, yading@10: { CH_CENTER_PAIR, AV_CH_FRONT_CENTER }, yading@10: { CH_WIDE_PAIR, CH_FRONT_PAIR }, yading@10: { CH_WIDE_PAIR, CH_CENTER_PAIR }, yading@10: { CH_WIDE_PAIR, AV_CH_FRONT_CENTER }, yading@10: { AV_CH_FRONT_CENTER, CH_FRONT_PAIR }, yading@10: { AV_CH_FRONT_CENTER, CH_CENTER_PAIR }, yading@10: { AV_CH_FRONT_CENTER, CH_WIDE_PAIR }, yading@10: { CH_SIDE_PAIR, CH_DIRECT_PAIR }, yading@10: { CH_SIDE_PAIR, CH_BACK_PAIR }, yading@10: { CH_SIDE_PAIR, AV_CH_BACK_CENTER }, yading@10: { CH_BACK_PAIR, CH_DIRECT_PAIR }, yading@10: { CH_BACK_PAIR, CH_SIDE_PAIR }, yading@10: { CH_BACK_PAIR, AV_CH_BACK_CENTER }, yading@10: { AV_CH_BACK_CENTER, CH_BACK_PAIR }, yading@10: { AV_CH_BACK_CENTER, CH_DIRECT_PAIR }, yading@10: { AV_CH_BACK_CENTER, CH_SIDE_PAIR }, yading@10: }; yading@10: yading@10: static void swap_channel_layouts_on_filter(AVFilterContext *filter) yading@10: { yading@10: AVFilterLink *link = NULL; yading@10: int i, j, k; yading@10: yading@10: for (i = 0; i < filter->nb_inputs; i++) { yading@10: link = filter->inputs[i]; yading@10: yading@10: if (link->type == AVMEDIA_TYPE_AUDIO && yading@10: link->out_channel_layouts->nb_channel_layouts == 1) yading@10: break; yading@10: } yading@10: if (i == filter->nb_inputs) yading@10: return; yading@10: yading@10: for (i = 0; i < filter->nb_outputs; i++) { yading@10: AVFilterLink *outlink = filter->outputs[i]; yading@10: int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX; yading@10: yading@10: if (outlink->type != AVMEDIA_TYPE_AUDIO || yading@10: outlink->in_channel_layouts->nb_channel_layouts < 2) yading@10: continue; yading@10: yading@10: for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) { yading@10: uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0]; yading@10: uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j]; yading@10: int in_channels = av_get_channel_layout_nb_channels(in_chlayout); yading@10: int out_channels = av_get_channel_layout_nb_channels(out_chlayout); yading@10: int count_diff = out_channels - in_channels; yading@10: int matched_channels, extra_channels; yading@10: int score = 100000; yading@10: yading@10: if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) { yading@10: /* Compute score in case the input or output layout encodes yading@10: a channel count; in this case the score is not altered by yading@10: the computation afterwards, as in_chlayout and yading@10: out_chlayout have both been set to 0 */ yading@10: if (FF_LAYOUT2COUNT(in_chlayout)) yading@10: in_channels = FF_LAYOUT2COUNT(in_chlayout); yading@10: if (FF_LAYOUT2COUNT(out_chlayout)) yading@10: out_channels = FF_LAYOUT2COUNT(out_chlayout); yading@10: score -= 10000 + FFABS(out_channels - in_channels) + yading@10: (in_channels > out_channels ? 10000 : 0); yading@10: in_chlayout = out_chlayout = 0; yading@10: /* Let the remaining computation run, even if the score yading@10: value is not altered */ yading@10: } yading@10: yading@10: /* channel substitution */ yading@10: for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) { yading@10: uint64_t cmp0 = ch_subst[k][0]; yading@10: uint64_t cmp1 = ch_subst[k][1]; yading@10: if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) && yading@10: (out_chlayout & cmp1) && (!( in_chlayout & cmp1))) { yading@10: in_chlayout &= ~cmp0; yading@10: out_chlayout &= ~cmp1; yading@10: /* add score for channel match, minus a deduction for yading@10: having to do the substitution */ yading@10: score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2; yading@10: } yading@10: } yading@10: yading@10: /* no penalty for LFE channel mismatch */ yading@10: if ( (in_chlayout & AV_CH_LOW_FREQUENCY) && yading@10: (out_chlayout & AV_CH_LOW_FREQUENCY)) yading@10: score += 10; yading@10: in_chlayout &= ~AV_CH_LOW_FREQUENCY; yading@10: out_chlayout &= ~AV_CH_LOW_FREQUENCY; yading@10: yading@10: matched_channels = av_get_channel_layout_nb_channels(in_chlayout & yading@10: out_chlayout); yading@10: extra_channels = av_get_channel_layout_nb_channels(out_chlayout & yading@10: (~in_chlayout)); yading@10: score += 10 * matched_channels - 5 * extra_channels; yading@10: yading@10: if (score > best_score || yading@10: (count_diff < best_count_diff && score == best_score)) { yading@10: best_score = score; yading@10: best_idx = j; yading@10: best_count_diff = count_diff; yading@10: } yading@10: } yading@10: av_assert0(best_idx >= 0); yading@10: FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0], yading@10: outlink->in_channel_layouts->channel_layouts[best_idx]); yading@10: } yading@10: yading@10: } yading@10: yading@10: static void swap_channel_layouts(AVFilterGraph *graph) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) yading@10: swap_channel_layouts_on_filter(graph->filters[i]); yading@10: } yading@10: yading@10: static void swap_sample_fmts_on_filter(AVFilterContext *filter) yading@10: { yading@10: AVFilterLink *link = NULL; yading@10: int format, bps; yading@10: int i, j; yading@10: yading@10: for (i = 0; i < filter->nb_inputs; i++) { yading@10: link = filter->inputs[i]; yading@10: yading@10: if (link->type == AVMEDIA_TYPE_AUDIO && yading@10: link->out_formats->format_count == 1) yading@10: break; yading@10: } yading@10: if (i == filter->nb_inputs) yading@10: return; yading@10: yading@10: format = link->out_formats->formats[0]; yading@10: bps = av_get_bytes_per_sample(format); yading@10: yading@10: for (i = 0; i < filter->nb_outputs; i++) { yading@10: AVFilterLink *outlink = filter->outputs[i]; yading@10: int best_idx = -1, best_score = INT_MIN; yading@10: yading@10: if (outlink->type != AVMEDIA_TYPE_AUDIO || yading@10: outlink->in_formats->format_count < 2) yading@10: continue; yading@10: yading@10: for (j = 0; j < outlink->in_formats->format_count; j++) { yading@10: int out_format = outlink->in_formats->formats[j]; yading@10: int out_bps = av_get_bytes_per_sample(out_format); yading@10: int score; yading@10: yading@10: if (av_get_packed_sample_fmt(out_format) == format || yading@10: av_get_planar_sample_fmt(out_format) == format) { yading@10: best_idx = j; yading@10: break; yading@10: } yading@10: yading@10: /* for s32 and float prefer double to prevent loss of information */ yading@10: if (bps == 4 && out_bps == 8) { yading@10: best_idx = j; yading@10: break; yading@10: } yading@10: yading@10: /* prefer closest higher or equal bps */ yading@10: score = -abs(out_bps - bps); yading@10: if (out_bps >= bps) yading@10: score += INT_MAX/2; yading@10: yading@10: if (score > best_score) { yading@10: best_score = score; yading@10: best_idx = j; yading@10: } yading@10: } yading@10: av_assert0(best_idx >= 0); yading@10: FFSWAP(int, outlink->in_formats->formats[0], yading@10: outlink->in_formats->formats[best_idx]); yading@10: } yading@10: } yading@10: yading@10: static void swap_sample_fmts(AVFilterGraph *graph) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) yading@10: swap_sample_fmts_on_filter(graph->filters[i]); yading@10: yading@10: } yading@10: yading@10: static int pick_formats(AVFilterGraph *graph) yading@10: { yading@10: int i, j, ret; yading@10: int change; yading@10: yading@10: do{ yading@10: change = 0; yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: AVFilterContext *filter = graph->filters[i]; yading@10: if (filter->nb_inputs){ yading@10: for (j = 0; j < filter->nb_inputs; j++){ yading@10: if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) { yading@10: if ((ret = pick_format(filter->inputs[j], NULL)) < 0) yading@10: return ret; yading@10: change = 1; yading@10: } yading@10: } yading@10: } yading@10: if (filter->nb_outputs){ yading@10: for (j = 0; j < filter->nb_outputs; j++){ yading@10: if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) { yading@10: if ((ret = pick_format(filter->outputs[j], NULL)) < 0) yading@10: return ret; yading@10: change = 1; yading@10: } yading@10: } yading@10: } yading@10: if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) { yading@10: for (j = 0; j < filter->nb_outputs; j++) { yading@10: if(filter->outputs[j]->format<0) { yading@10: if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0) yading@10: return ret; yading@10: change = 1; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: }while(change); yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: AVFilterContext *filter = graph->filters[i]; yading@10: yading@10: for (j = 0; j < filter->nb_inputs; j++) yading@10: if ((ret = pick_format(filter->inputs[j], NULL)) < 0) yading@10: return ret; yading@10: for (j = 0; j < filter->nb_outputs; j++) yading@10: if ((ret = pick_format(filter->outputs[j], NULL)) < 0) yading@10: return ret; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Configure the formats of all the links in the graph. yading@10: */ yading@10: static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) yading@10: { yading@10: int ret; yading@10: yading@10: /* find supported formats from sub-filters, and merge along links */ yading@10: while ((ret = query_formats(graph, log_ctx)) == AVERROR(EAGAIN)) yading@10: av_log(graph, AV_LOG_DEBUG, "query_formats not finished\n"); yading@10: if (ret < 0) yading@10: return ret; yading@10: yading@10: /* Once everything is merged, it's possible that we'll still have yading@10: * multiple valid media format choices. We try to minimize the amount yading@10: * of format conversion inside filters */ yading@10: reduce_formats(graph); yading@10: yading@10: /* for audio filters, ensure the best format, sample rate and channel layout yading@10: * is selected */ yading@10: swap_sample_fmts(graph); yading@10: swap_samplerates(graph); yading@10: swap_channel_layouts(graph); yading@10: yading@10: if ((ret = pick_formats(graph)) < 0) yading@10: return ret; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph, yading@10: AVClass *log_ctx) yading@10: { yading@10: unsigned i, j; yading@10: int sink_links_count = 0, n = 0; yading@10: AVFilterContext *f; yading@10: AVFilterLink **sinks; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: f = graph->filters[i]; yading@10: for (j = 0; j < f->nb_inputs; j++) { yading@10: f->inputs[j]->graph = graph; yading@10: f->inputs[j]->age_index = -1; yading@10: } yading@10: for (j = 0; j < f->nb_outputs; j++) { yading@10: f->outputs[j]->graph = graph; yading@10: f->outputs[j]->age_index= -1; yading@10: } yading@10: if (!f->nb_outputs) { yading@10: if (f->nb_inputs > INT_MAX - sink_links_count) yading@10: return AVERROR(EINVAL); yading@10: sink_links_count += f->nb_inputs; yading@10: } yading@10: } yading@10: sinks = av_calloc(sink_links_count, sizeof(*sinks)); yading@10: if (!sinks) yading@10: return AVERROR(ENOMEM); yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: f = graph->filters[i]; yading@10: if (!f->nb_outputs) { yading@10: for (j = 0; j < f->nb_inputs; j++) { yading@10: sinks[n] = f->inputs[j]; yading@10: f->inputs[j]->age_index = n++; yading@10: } yading@10: } yading@10: } yading@10: av_assert0(n == sink_links_count); yading@10: graph->sink_links = sinks; yading@10: graph->sink_links_count = sink_links_count; yading@10: return 0; yading@10: } yading@10: yading@10: static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx) yading@10: { yading@10: AVFilterContext *f; yading@10: int i, j, ret; yading@10: int fifo_count = 0; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: f = graph->filters[i]; yading@10: yading@10: for (j = 0; j < f->nb_inputs; j++) { yading@10: AVFilterLink *link = f->inputs[j]; yading@10: AVFilterContext *fifo_ctx; yading@10: AVFilter *fifo; yading@10: char name[32]; yading@10: yading@10: if (!link->dstpad->needs_fifo) yading@10: continue; yading@10: yading@10: fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ? yading@10: avfilter_get_by_name("fifo") : yading@10: avfilter_get_by_name("afifo"); yading@10: yading@10: snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++); yading@10: yading@10: ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL, yading@10: NULL, graph); yading@10: if (ret < 0) yading@10: return ret; yading@10: yading@10: ret = avfilter_insert_filter(link, fifo_ctx, 0, 0); yading@10: if (ret < 0) yading@10: return ret; yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx) yading@10: { yading@10: int ret; yading@10: yading@10: if ((ret = graph_check_validity(graphctx, log_ctx))) yading@10: return ret; yading@10: if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0) yading@10: return ret; yading@10: if ((ret = graph_config_formats(graphctx, log_ctx))) yading@10: return ret; yading@10: if ((ret = graph_config_links(graphctx, log_ctx))) yading@10: return ret; yading@10: if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx))) yading@10: return ret; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags) yading@10: { yading@10: int i, r = AVERROR(ENOSYS); yading@10: yading@10: if(!graph) yading@10: return r; yading@10: yading@10: if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) { yading@10: r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST); yading@10: if(r != AVERROR(ENOSYS)) yading@10: return r; yading@10: } yading@10: yading@10: if(res_len && res) yading@10: res[0]= 0; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: AVFilterContext *filter = graph->filters[i]; yading@10: if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){ yading@10: r = avfilter_process_command(filter, cmd, arg, res, res_len, flags); yading@10: if(r != AVERROR(ENOSYS)) { yading@10: if((flags & AVFILTER_CMD_FLAG_ONE) || r<0) yading@10: return r; yading@10: } yading@10: } yading@10: } yading@10: yading@10: return r; yading@10: } yading@10: yading@10: int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts) yading@10: { yading@10: int i; yading@10: yading@10: if(!graph) yading@10: return 0; yading@10: yading@10: for (i = 0; i < graph->nb_filters; i++) { yading@10: AVFilterContext *filter = graph->filters[i]; yading@10: if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){ yading@10: AVFilterCommand **queue = &filter->command_queue, *next; yading@10: while (*queue && (*queue)->time <= ts) yading@10: queue = &(*queue)->next; yading@10: next = *queue; yading@10: *queue = av_mallocz(sizeof(AVFilterCommand)); yading@10: (*queue)->command = av_strdup(command); yading@10: (*queue)->arg = av_strdup(arg); yading@10: (*queue)->time = ts; yading@10: (*queue)->flags = flags; yading@10: (*queue)->next = next; yading@10: if(flags & AVFILTER_CMD_FLAG_ONE) yading@10: return 0; yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static void heap_bubble_up(AVFilterGraph *graph, yading@10: AVFilterLink *link, int index) yading@10: { yading@10: AVFilterLink **links = graph->sink_links; yading@10: yading@10: while (index) { yading@10: int parent = (index - 1) >> 1; yading@10: if (links[parent]->current_pts >= link->current_pts) yading@10: break; yading@10: links[index] = links[parent]; yading@10: links[index]->age_index = index; yading@10: index = parent; yading@10: } yading@10: links[index] = link; yading@10: link->age_index = index; yading@10: } yading@10: yading@10: static void heap_bubble_down(AVFilterGraph *graph, yading@10: AVFilterLink *link, int index) yading@10: { yading@10: AVFilterLink **links = graph->sink_links; yading@10: yading@10: while (1) { yading@10: int child = 2 * index + 1; yading@10: if (child >= graph->sink_links_count) yading@10: break; yading@10: if (child + 1 < graph->sink_links_count && yading@10: links[child + 1]->current_pts < links[child]->current_pts) yading@10: child++; yading@10: if (link->current_pts < links[child]->current_pts) yading@10: break; yading@10: links[index] = links[child]; yading@10: links[index]->age_index = index; yading@10: index = child; yading@10: } yading@10: links[index] = link; yading@10: link->age_index = index; yading@10: } yading@10: yading@10: void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link) yading@10: { yading@10: heap_bubble_up (graph, link, link->age_index); yading@10: heap_bubble_down(graph, link, link->age_index); yading@10: } yading@10: yading@10: yading@10: int avfilter_graph_request_oldest(AVFilterGraph *graph) yading@10: { yading@10: while (graph->sink_links_count) { yading@10: AVFilterLink *oldest = graph->sink_links[0]; yading@10: int r = ff_request_frame(oldest); yading@10: if (r != AVERROR_EOF) yading@10: return r; yading@10: av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n", yading@10: oldest->dst ? oldest->dst->name : "unknown", yading@10: oldest->dstpad ? oldest->dstpad->name : "unknown"); yading@10: /* EOF: remove the link from the heap */ yading@10: if (oldest->age_index < --graph->sink_links_count) yading@10: heap_bubble_down(graph, graph->sink_links[graph->sink_links_count], yading@10: oldest->age_index); yading@10: oldest->age_index = -1; yading@10: } yading@10: return AVERROR_EOF; yading@10: }