diff options
Diffstat (limited to 'libavfilter/avfiltergraph.c')
| -rw-r--r-- | libavfilter/avfiltergraph.c | 521 |
1 files changed, 476 insertions, 45 deletions
diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c index 913102642a..7ae8a37ed6 100644 --- a/libavfilter/avfiltergraph.c +++ b/libavfilter/avfiltergraph.c @@ -3,20 +3,20 @@ * Copyright (c) 2008 Vitor Sessak * Copyright (c) 2007 Bobby Bingham * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -24,17 +24,30 @@ #include "libavutil/avassert.h" #include "libavutil/avstring.h" +#include "libavutil/bprint.h" #include "libavutil/channel_layout.h" -#include "libavutil/common.h" -#include "libavutil/log.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2() #include "avfilter.h" #include "formats.h" #include "internal.h" +#define OFFSET(x) offsetof(AVFilterGraph,x) + +static const AVOption options[]={ +{"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, +{"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, +{0} +}; + + static const AVClass filtergraph_class = { .class_name = "AVFilterGraph", .item_name = av_default_item_name, + .option = options, .version = LIBAVUTIL_VERSION_INT, + .category = AV_CLASS_CATEGORY_FILTER, }; AVFilterGraph *avfilter_graph_alloc(void) @@ -67,7 +80,9 @@ void avfilter_graph_free(AVFilterGraph **graph) while ((*graph)->nb_filters) avfilter_free((*graph)->filters[0]); + 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); @@ -85,7 +100,7 @@ int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) graph->filters[graph->nb_filters++] = filter; #if FF_API_FOO_COUNT - graph->filter_count = graph->nb_filters; + graph->filter_count_unused = graph->nb_filters; #endif filter->graph = graph; @@ -117,6 +132,11 @@ fail: 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) @@ -137,7 +157,7 @@ AVFilterContext *avfilter_graph_alloc_filter(AVFilterGraph *graph, graph->filters[graph->nb_filters++] = s; #if FF_API_FOO_COUNT - graph->filter_count = graph->nb_filters; + graph->filter_count_unused = graph->nb_filters; #endif s->graph = graph; @@ -159,22 +179,25 @@ static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx) 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\" for the filter \"%s\" of type \"%s\" not connected to any source\n", - filt->input_pads[j].name, filt->name, filt->filter->name); + "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\" for the filter \"%s\" of type \"%s\" not connected to any destination\n", - filt->output_pads[j].name, filt->name, filt->filter->name); + "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); } } @@ -216,17 +239,114 @@ AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name) 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; +} + +/** + * 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 */ - /* ask all the sub-filters for their supported media formats */ for (i = 0; i < graph->nb_filters; i++) { - if (graph->filters[i]->filter->query_formats) - graph->filters[i]->filter->query_formats(graph->filters[i]); + AVFilterContext *f = graph->filters[i]; + if (formats_declared(f)) + continue; + if (f->filter->query_formats) + ret = filter_query_formats(f); else - ff_default_query_formats(graph->filters[i]); + 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 */ @@ -240,20 +360,33 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) if (!link) continue; - if (link->in_formats != link->out_formats && - !ff_merge_formats(link->in_formats, - link->out_formats)) - convert_needed = 1; - if (link->type == AVMEDIA_TYPE_AUDIO) { - if (link->in_channel_layouts != link->out_channel_layouts && - !ff_merge_channel_layouts(link->in_channel_layouts, - link->out_channel_layouts)) - convert_needed = 1; - if (link->in_samplerates != link->out_samplerates && - !ff_merge_samplerates(link->in_samplerates, - link->out_samplerates)) +#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 { \ + count_merged++; \ + statement \ + } + MERGE_DISPATCH(formats, + if (!ff_merge_formats(link->in_formats, link->out_formats, + link->type)) convert_needed = 1; + ) + 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; + ) } +#undef MERGE_DISPATCH if (convert_needed) { AVFilterContext *convert; @@ -280,8 +413,8 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) return ret; break; case AVMEDIA_TYPE_AUDIO: - if (!(filter = avfilter_get_by_name("resample"))) { - av_log(log_ctx, AV_LOG_ERROR, "'resample' filter " + 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); } @@ -289,11 +422,11 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d", resampler_count++); scale_args[0] = '\0'; - if (graph->resample_lavr_opts) + if (graph->aresample_swr_opts) snprintf(scale_args, sizeof(scale_args), "%s", - graph->resample_lavr_opts); + graph->aresample_swr_opts); if ((ret = avfilter_graph_create_filter(&convert, filter, - inst_name, scale_args, + inst_name, graph->aresample_swr_opts, NULL, graph)) < 0) return ret; break; @@ -304,11 +437,11 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0) return ret; - convert->filter->query_formats(convert); + filter_query_formats(convert); inlink = convert->inputs[0]; outlink = convert->outputs[0]; - if (!ff_merge_formats( inlink->in_formats, inlink->out_formats) || - !ff_merge_formats(outlink->in_formats, outlink->out_formats)) + 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, @@ -333,14 +466,54 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) } } + 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) +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->format_count; i++) { + enum AVPixelFormat p = link->in_formats->formats[i]; + best= avcodec_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->format_count, + av_get_pix_fmt_name(ref->format), has_alpha); + link->in_formats->formats[0] = best; + } + } + link->in_formats->format_count = 1; link->format = link->in_formats->formats[0]; @@ -354,14 +527,18 @@ static int pick_format(AVFilterLink *link) link->in_samplerates->format_count = 1; link->sample_rate = link->in_samplerates->formats[0]; - if (!link->in_channel_layouts->nb_channel_layouts) { + 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, + " the link between filters %s and %s.\n", link->src->name, link->dst->name); 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); @@ -417,8 +594,42 @@ static int reduce_formats_on_filter(AVFilterContext *filter) format_count, ff_add_format); REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats, format_count, ff_add_format); - REDUCE_FORMATS(uint64_t, AVFilterChannelLayouts, channel_layouts, - channel_layouts, nb_channel_layouts, ff_add_channel_layout); + + /* 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) { + /* 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; } @@ -546,7 +757,23 @@ static void swap_channel_layouts_on_filter(AVFilterContext *filter) 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 = 0; + 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++) { @@ -669,15 +896,50 @@ static void swap_sample_fmts(AVFilterGraph *graph) 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->format_count == 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->format_count == 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])) < 0) + 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])) < 0) + if ((ret = pick_format(filter->outputs[j], NULL)) < 0) return ret; } return 0; @@ -691,7 +953,9 @@ static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) int ret; /* find supported formats from sub-filters, and merge along links */ - if ((ret = query_formats(graph, log_ctx)) < 0) + 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 @@ -711,6 +975,48 @@ static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) 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; @@ -761,6 +1067,131 @@ int avfilter_graph_config(AVFilterGraph *graphctx, void *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; +} |