| /* |
| * 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; |
| |
| 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; |
| |
| 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 ((ret = ff_set_common_formats(ctx, formats)) < 0) |
| return ret; |
| if (type == AVMEDIA_TYPE_AUDIO) { |
| samplerates = ff_all_samplerates(); |
| if ((ret = ff_set_common_samplerates(ctx, samplerates)) < 0) |
| return ret; |
| chlayouts = ff_all_channel_layouts(); |
| if ((ret = ff_set_common_channel_layouts(ctx, chlayouts)) < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int formats_declared(AVFilterContext *f) |
| { |
| int i; |
| |
| for (i = 0; i < f->nb_inputs; i++) { |
| if (!f->inputs[i]->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; |
| |
| if ((ret = filter_query_formats(convert)) < 0) |
| return ret; |
| |
| inlink = convert->inputs[0]; |
| outlink = convert->outputs[0]; |
| av_assert0( inlink-> in_formats->refcount > 0); |
| av_assert0( inlink->out_formats->refcount > 0); |
| av_assert0(outlink-> in_formats->refcount > 0); |
| av_assert0(outlink->out_formats->refcount > 0); |
| if (outlink->type == AVMEDIA_TYPE_AUDIO) { |
| av_assert0( inlink-> in_samplerates->refcount > 0); |
| av_assert0( inlink->out_samplerates->refcount > 0); |
| av_assert0(outlink-> in_samplerates->refcount > 0); |
| av_assert0(outlink->out_samplerates->refcount > 0); |
| av_assert0( inlink-> in_channel_layouts->refcount > 0); |
| av_assert0( inlink->out_channel_layouts->refcount > 0); |
| av_assert0(outlink-> in_channel_layouts->refcount > 0); |
| av_assert0(outlink->out_channel_layouts->refcount > 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 get_fmt_score(enum AVSampleFormat dst_fmt, enum AVSampleFormat src_fmt) |
| { |
| int score = 0; |
| |
| if (av_sample_fmt_is_planar(dst_fmt) != av_sample_fmt_is_planar(src_fmt)) |
| score ++; |
| |
| if (av_get_bytes_per_sample(dst_fmt) < av_get_bytes_per_sample(src_fmt)) { |
| score += 100 * (av_get_bytes_per_sample(src_fmt) - av_get_bytes_per_sample(dst_fmt)); |
| }else |
| score += 10 * (av_get_bytes_per_sample(dst_fmt) - av_get_bytes_per_sample(src_fmt)); |
| |
| if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_S32 && |
| av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_FLT) |
| score += 20; |
| |
| if (av_get_packed_sample_fmt(dst_fmt) == AV_SAMPLE_FMT_FLT && |
| av_get_packed_sample_fmt(src_fmt) == AV_SAMPLE_FMT_S32) |
| score += 2; |
| |
| return score; |
| } |
| |
| static enum AVSampleFormat find_best_sample_fmt_of_2(enum AVSampleFormat dst_fmt1, enum AVSampleFormat dst_fmt2, |
| enum AVSampleFormat src_fmt) |
| { |
| int score1, score2; |
| |
| score1 = get_fmt_score(dst_fmt1, src_fmt); |
| score2 = get_fmt_score(dst_fmt2, src_fmt); |
| |
| return score1 < score2 ? dst_fmt1 : dst_fmt2; |
| } |
| |
| static int pick_format(AVFilterLink *link, AVFilterLink *ref) |
| { |
| if (!link || !link->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; |
| } |
| } else if (link->type == AVMEDIA_TYPE_AUDIO) { |
| if(ref && ref->type == AVMEDIA_TYPE_AUDIO){ |
| enum AVSampleFormat best= AV_SAMPLE_FMT_NONE; |
| int i; |
| for (i=0; i<link->in_formats->nb_formats; i++) { |
| enum AVSampleFormat p = link->in_formats->formats[i]; |
| best = find_best_sample_fmt_of_2(best, p, ref->format); |
| } |
| av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s\n", |
| av_get_sample_fmt_name(best), link->in_formats->nb_formats, |
| av_get_sample_fmt_name(ref->format)); |
| 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, unref_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) { \ |
| if ((ret = add_format(&out_link->in_ ##list, fmt)) < 0)\ |
| return ret; \ |
| 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, ff_formats_unref); |
| REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats, |
| nb_formats, ff_add_format, ff_formats_unref); |
| |
| /* 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; |
| if (ff_add_channel_layout(&outlink->in_channel_layouts, fmt) < 0) |
| ret = 1; |
| 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 int reduce_formats(AVFilterGraph *graph) |
| { |
| int i, reduced, ret; |
| |
| do { |
| reduced = 0; |
| |
| for (i = 0; i < graph->nb_filters; i++) { |
| if ((ret = reduce_formats_on_filter(graph->filters[i])) < 0) |
| return ret; |
| reduced |= ret; |
| } |
| } while (reduced); |
| |
| return 0; |
| } |
| |
| static void swap_samplerates_on_filter(AVFilterContext *filter) |
| { |
| AVFilterLink *link = NULL; |
| int sample_rate; |
| int i, j; |
| |
| for (i = 0; i < filter->nb_inputs; i++) { |
| link = filter->inputs[i]; |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO && |
| link->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 */ |
| if ((ret = reduce_formats(graph)) < 0) |
| return ret; |
| |
| /* for audio filters, ensure the best format, sample rate and channel layout |
| * is selected */ |
| swap_sample_fmts(graph); |
| swap_samplerates(graph); |
| swap_channel_layouts(graph); |
| |
| if ((ret = pick_formats(graph)) < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int graph_config_pointers(AVFilterGraph *graph, |
| 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 = 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; |
| |
| av_assert0(index >= 0); |
| |
| while (index) { |
| int parent = (index - 1) >> 1; |
| if (links[parent]->current_pts_us >= link->current_pts_us) |
| break; |
| links[index] = links[parent]; |
| links[index]->age_index = index; |
| index = parent; |
| } |
| links[index] = link; |
| link->age_index = index; |
| } |
| |
| static void heap_bubble_down(AVFilterGraph *graph, |
| AVFilterLink *link, int index) |
| { |
| AVFilterLink **links = graph->sink_links; |
| |
| av_assert0(index >= 0); |
| |
| while (1) { |
| int child = 2 * index + 1; |
| if (child >= graph->sink_links_count) |
| break; |
| if (child + 1 < graph->sink_links_count && |
| links[child + 1]->current_pts_us < links[child]->current_pts_us) |
| child++; |
| if (link->current_pts_us < links[child]->current_pts_us) |
| break; |
| links[index] = links[child]; |
| links[index]->age_index = index; |
| index = child; |
| } |
| links[index] = link; |
| link->age_index = index; |
| } |
| |
| void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link) |
| { |
| heap_bubble_up (graph, link, link->age_index); |
| heap_bubble_down(graph, link, link->age_index); |
| } |
| |
| |
| int avfilter_graph_request_oldest(AVFilterGraph *graph) |
| { |
| AVFilterLink *oldest = graph->sink_links[0]; |
| int r; |
| |
| while (graph->sink_links_count) { |
| oldest = graph->sink_links[0]; |
| r = ff_request_frame(oldest); |
| if (r != AVERROR_EOF) |
| break; |
| av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n", |
| oldest->dst ? 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; |
| } |
| if (!graph->sink_links_count) |
| return AVERROR_EOF; |
| av_assert1(oldest->age_index >= 0); |
| while (oldest->frame_wanted_out) { |
| r = ff_filter_graph_run_once(graph); |
| if (r < 0) |
| return r; |
| } |
| return 0; |
| } |
| |
| static AVFilterLink *graph_run_once_find_filter(AVFilterGraph *graph) |
| { |
| unsigned i, j; |
| AVFilterContext *f; |
| |
| /* TODO: replace scanning the graph with a priority list */ |
| for (i = 0; i < graph->nb_filters; i++) { |
| f = graph->filters[i]; |
| for (j = 0; j < f->nb_outputs; j++) |
| if (f->outputs[j]->frame_wanted_in) |
| return f->outputs[j]; |
| } |
| for (i = 0; i < graph->nb_filters; i++) { |
| f = graph->filters[i]; |
| for (j = 0; j < f->nb_outputs; j++) |
| if (f->outputs[j]->frame_wanted_out) |
| return f->outputs[j]; |
| } |
| return NULL; |
| } |
| |
| int ff_filter_graph_run_once(AVFilterGraph *graph) |
| { |
| AVFilterLink *link; |
| int ret; |
| |
| link = graph_run_once_find_filter(graph); |
| if (!link) { |
| av_log(NULL, AV_LOG_WARNING, "Useless run of a filter graph\n"); |
| return AVERROR(EAGAIN); |
| } |
| ret = ff_request_frame_to_filter(link); |
| if (ret == AVERROR_EOF) |
| /* local EOF will be forwarded through request_frame() / |
| set_status() until it reaches the sink */ |
| ret = 0; |
| return ret < 0 ? ret : 1; |
| } |
