| /* |
| * 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 <ctype.h> |
| #include <string.h> |
| |
| #include "libavutil/audioconvert.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "avfiltergraph.h" |
| #include "formats.h" |
| #include "internal.h" |
| |
| #include "libavutil/audioconvert.h" |
| #include "libavutil/log.h" |
| |
| static const AVClass filtergraph_class = { |
| .class_name = "AVFilterGraph", |
| .item_name = av_default_item_name, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVFilterGraph *avfilter_graph_alloc(void) |
| { |
| AVFilterGraph *ret = av_mallocz(sizeof(AVFilterGraph)); |
| if (!ret) |
| return NULL; |
| #if FF_API_GRAPH_AVCLASS |
| ret->av_class = &filtergraph_class; |
| #endif |
| return ret; |
| } |
| |
| void avfilter_graph_free(AVFilterGraph **graph) |
| { |
| if (!*graph) |
| return; |
| for (; (*graph)->filter_count > 0; (*graph)->filter_count--) |
| avfilter_free((*graph)->filters[(*graph)->filter_count - 1]); |
| av_freep(&(*graph)->sink_links); |
| av_freep(&(*graph)->scale_sws_opts); |
| av_freep(&(*graph)->filters); |
| av_freep(graph); |
| } |
| |
| int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) |
| { |
| AVFilterContext **filters = av_realloc(graph->filters, |
| sizeof(AVFilterContext*) * (graph->filter_count+1)); |
| if (!filters) |
| return AVERROR(ENOMEM); |
| |
| graph->filters = filters; |
| graph->filters[graph->filter_count++] = filter; |
| |
| return 0; |
| } |
| |
| int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt, |
| const char *name, const char *args, void *opaque, |
| AVFilterGraph *graph_ctx) |
| { |
| int ret; |
| |
| if ((ret = avfilter_open(filt_ctx, filt, name)) < 0) |
| goto fail; |
| if ((ret = avfilter_init_filter(*filt_ctx, args, opaque)) < 0) |
| goto fail; |
| if ((ret = avfilter_graph_add_filter(graph_ctx, *filt_ctx)) < 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; |
| } |
| |
| int ff_avfilter_graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx) |
| { |
| AVFilterContext *filt; |
| int i, j; |
| |
| for (i = 0; i < graph->filter_count; i++) { |
| filt = graph->filters[i]; |
| |
| for (j = 0; j < filt->input_count; j++) { |
| if (!filt->inputs[j] || !filt->inputs[j]->src) { |
| 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); |
| return AVERROR(EINVAL); |
| } |
| } |
| |
| for (j = 0; j < filt->output_count; j++) { |
| if (!filt->outputs[j] || !filt->outputs[j]->dst) { |
| 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); |
| return AVERROR(EINVAL); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| int ff_avfilter_graph_config_links(AVFilterGraph *graph, AVClass *log_ctx) |
| { |
| AVFilterContext *filt; |
| int i, ret; |
| |
| for (i=0; i < graph->filter_count; i++) { |
| filt = graph->filters[i]; |
| |
| if (!filt->output_count) { |
| if ((ret = avfilter_config_links(filt))) |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name) |
| { |
| int i; |
| |
| for (i = 0; i < graph->filter_count; i++) |
| if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name)) |
| return graph->filters[i]; |
| |
| return NULL; |
| } |
| |
| static int insert_conv_filter(AVFilterGraph *graph, AVFilterLink *link, |
| const char *filt_name, const char *filt_args) |
| { |
| static int auto_count = 0, ret; |
| char inst_name[32]; |
| AVFilterContext *filt_ctx; |
| |
| if (graph->disable_auto_convert) { |
| av_log(NULL, AV_LOG_ERROR, |
| "The filters '%s' and '%s' do not have a common format " |
| "and automatic conversion is disabled.\n", |
| link->src->name, link->dst->name); |
| return AVERROR(EINVAL); |
| } |
| |
| snprintf(inst_name, sizeof(inst_name), "auto-inserted %s %d", |
| filt_name, auto_count++); |
| |
| if ((ret = avfilter_graph_create_filter(&filt_ctx, |
| avfilter_get_by_name(filt_name), |
| inst_name, filt_args, NULL, graph)) < 0) |
| return ret; |
| if ((ret = avfilter_insert_filter(link, filt_ctx, 0, 0)) < 0) |
| return ret; |
| |
| filt_ctx->filter->query_formats(filt_ctx); |
| |
| if ( ((link = filt_ctx-> inputs[0]) && |
| !avfilter_merge_formats(link->in_formats, link->out_formats)) || |
| ((link = filt_ctx->outputs[0]) && |
| !avfilter_merge_formats(link->in_formats, link->out_formats)) |
| ) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Impossible to convert between the formats supported by the filter " |
| "'%s' and the filter '%s'\n", link->src->name, link->dst->name); |
| return AVERROR(EINVAL); |
| } |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO && |
| (((link = filt_ctx-> inputs[0]) && |
| !ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts)) || |
| ((link = filt_ctx->outputs[0]) && |
| !ff_merge_channel_layouts(link->in_channel_layouts, link->out_channel_layouts))) |
| ) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Impossible to convert between the channel layouts formats supported by the filter " |
| "'%s' and the filter '%s'\n", link->src->name, link->dst->name); |
| return AVERROR(EINVAL); |
| } |
| |
| return 0; |
| } |
| |
| static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) |
| { |
| int i, j, ret; |
| char filt_args[128]; |
| AVFilterFormats *formats; |
| AVFilterChannelLayouts *chlayouts; |
| AVFilterFormats *samplerates; |
| int scaler_count = 0, resampler_count = 0; |
| |
| /* ask all the sub-filters for their supported media formats */ |
| for (i = 0; i < graph->filter_count; i++) { |
| if (graph->filters[i]->filter->query_formats) |
| graph->filters[i]->filter->query_formats(graph->filters[i]); |
| else |
| ff_default_query_formats(graph->filters[i]); |
| } |
| |
| /* go through and merge as many format lists as possible */ |
| for (i = 0; i < graph->filter_count; i++) { |
| AVFilterContext *filter = graph->filters[i]; |
| |
| for (j = 0; j < filter->input_count; j++) { |
| AVFilterLink *link = filter->inputs[j]; |
| #if 0 |
| if (!link) continue; |
| |
| if (!link->in_formats || !link->out_formats) |
| return AVERROR(EINVAL); |
| |
| if (link->type == AVMEDIA_TYPE_VIDEO && |
| !avfilter_merge_formats(link->in_formats, link->out_formats)) { |
| |
| /* couldn't merge format lists, auto-insert scale filter */ |
| snprintf(filt_args, sizeof(filt_args), "0:0:%s", |
| graph->scale_sws_opts); |
| if (ret = insert_conv_filter(graph, link, "scale", filt_args)) |
| return ret; |
| } |
| else if (link->type == AVMEDIA_TYPE_AUDIO) { |
| if (!link->in_channel_layouts || !link->out_channel_layouts) |
| return AVERROR(EINVAL); |
| |
| /* Merge all three list before checking: that way, in all |
| * three categories, aconvert will use a common format |
| * whenever possible. */ |
| formats = avfilter_merge_formats(link->in_formats, link->out_formats); |
| chlayouts = ff_merge_channel_layouts(link->in_channel_layouts , link->out_channel_layouts); |
| samplerates = ff_merge_samplerates (link->in_samplerates, link->out_samplerates); |
| |
| if (!formats || !chlayouts || !samplerates) |
| if (ret = insert_conv_filter(graph, link, "aresample", NULL)) |
| return ret; |
| #else |
| int convert_needed = 0; |
| |
| if (!link) |
| continue; |
| |
| if (link->in_formats != link->out_formats && |
| !avfilter_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)) |
| convert_needed = 1; |
| } |
| |
| 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: |
| snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d", |
| scaler_count++); |
| snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts); |
| if ((ret = avfilter_graph_create_filter(&convert, |
| avfilter_get_by_name("scale"), |
| inst_name, scale_args, NULL, |
| graph)) < 0) |
| return ret; |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| if (!(filter = avfilter_get_by_name("aresample"))) { |
| av_log(log_ctx, AV_LOG_ERROR, "'resample' filter " |
| "not present, cannot convert audio formats.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d", |
| resampler_count++); |
| if ((ret = avfilter_graph_create_filter(&convert, |
| avfilter_get_by_name("aresample"), |
| inst_name, NULL, NULL, graph)) < 0) |
| return ret; |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| |
| if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0) |
| return ret; |
| |
| convert->filter->query_formats(convert); |
| inlink = convert->inputs[0]; |
| outlink = convert->outputs[0]; |
| if (!avfilter_merge_formats( inlink->in_formats, inlink->out_formats) || |
| !avfilter_merge_formats(outlink->in_formats, outlink->out_formats)) |
| 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; |
| } |
| #endif |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int pick_format(AVFilterLink *link, AVFilterLink *ref) |
| { |
| if (!link || !link->in_formats) |
| return 0; |
| |
| if (link->type == AVMEDIA_TYPE_VIDEO) { |
| if(ref && ref->type == AVMEDIA_TYPE_VIDEO){ |
| int has_alpha= av_pix_fmt_descriptors[ref->format].nb_components % 2 == 0; |
| enum PixelFormat best= PIX_FMT_NONE; |
| int i; |
| for (i=0; i<link->in_formats->format_count; i++) { |
| enum PixelFormat p = link->in_formats->formats[i]; |
| best= avcodec_find_best_pix_fmt2(best, p, ref->format, has_alpha, NULL); |
| } |
| link->in_formats->formats[0] = best; |
| } |
| } |
| |
| link->in_formats->format_count = 1; |
| link->format = link->in_formats->formats[0]; |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO) { |
| if (!link->in_samplerates->format_count) { |
| 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->format_count = 1; |
| link->sample_rate = link->in_samplerates->formats[0]; |
| |
| if (!link->in_channel_layouts->nb_channel_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); |
| return AVERROR(EINVAL); |
| } |
| link->in_channel_layouts->nb_channel_layouts = 1; |
| link->channel_layout = link->in_channel_layouts->channel_layouts[0]; |
| } |
| |
| avfilter_formats_unref(&link->in_formats); |
| avfilter_formats_unref(&link->out_formats); |
| avfilter_formats_unref(&link->in_samplerates); |
| avfilter_formats_unref(&link->out_samplerates); |
| ff_channel_layouts_unref(&link->in_channel_layouts); |
| ff_channel_layouts_unref(&link->out_channel_layouts); |
| |
| return 0; |
| } |
| |
| #define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \ |
| do { \ |
| for (i = 0; i < filter->input_count; 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->output_count; j++) { \ |
| AVFilterLink *out_link = filter->outputs[j]; \ |
| list_type *fmts; \ |
| \ |
| if (link->type != out_link->type || \ |
| out_link->in_ ## list->nb == 1) \ |
| continue; \ |
| fmts = out_link->in_ ## list; \ |
| \ |
| if (!out_link->in_ ## list->nb) { \ |
| add_format(&out_link->in_ ##list, fmt); \ |
| 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, |
| format_count, avfilter_add_format); |
| REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats, |
| format_count, avfilter_add_format); |
| REDUCE_FORMATS(uint64_t, AVFilterChannelLayouts, channel_layouts, |
| channel_layouts, nb_channel_layouts, ff_add_channel_layout); |
| |
| return ret; |
| } |
| |
| static void reduce_formats(AVFilterGraph *graph) |
| { |
| int i, reduced; |
| |
| do { |
| reduced = 0; |
| |
| for (i = 0; i < graph->filter_count; i++) |
| reduced |= reduce_formats_on_filter(graph->filters[i]); |
| } while (reduced); |
| } |
| |
| static void swap_samplerates_on_filter(AVFilterContext *filter) |
| { |
| AVFilterLink *link = NULL; |
| int sample_rate; |
| int i, j; |
| |
| for (i = 0; i < filter->input_count; i++) { |
| link = filter->inputs[i]; |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO && |
| link->out_samplerates->format_count == 1) |
| break; |
| } |
| if (i == filter->input_count) |
| return; |
| |
| sample_rate = link->out_samplerates->formats[0]; |
| |
| for (i = 0; i < filter->output_count; i++) { |
| AVFilterLink *outlink = filter->outputs[i]; |
| int best_idx, best_diff = INT_MAX; |
| |
| if (outlink->type != AVMEDIA_TYPE_AUDIO || |
| outlink->in_samplerates->format_count < 2) |
| continue; |
| |
| for (j = 0; j < outlink->in_samplerates->format_count; 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->filter_count; i++) |
| swap_samplerates_on_filter(graph->filters[i]); |
| } |
| |
| static void swap_channel_layouts_on_filter(AVFilterContext *filter) |
| { |
| AVFilterLink *link = NULL; |
| uint64_t chlayout; |
| int i, j; |
| |
| for (i = 0; i < filter->input_count; i++) { |
| link = filter->inputs[i]; |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO && |
| link->out_channel_layouts->nb_channel_layouts == 1) |
| break; |
| } |
| if (i == filter->input_count) |
| return; |
| |
| chlayout = link->out_channel_layouts->channel_layouts[0]; |
| |
| for (i = 0; i < filter->output_count; i++) { |
| AVFilterLink *outlink = filter->outputs[i]; |
| int best_idx, best_score = INT_MIN; |
| |
| 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 out_chlayout = outlink->in_channel_layouts->channel_layouts[j]; |
| int matched_channels = av_get_channel_layout_nb_channels(chlayout & |
| out_chlayout); |
| int extra_channels = av_get_channel_layout_nb_channels(out_chlayout & |
| (~chlayout)); |
| int score = matched_channels - extra_channels; |
| |
| if (score > best_score) { |
| best_score = score; |
| best_idx = j; |
| } |
| } |
| 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->filter_count; 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->input_count; i++) { |
| link = filter->inputs[i]; |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO && |
| link->out_formats->format_count == 1) |
| break; |
| } |
| if (i == filter->input_count) |
| return; |
| |
| format = link->out_formats->formats[0]; |
| bps = av_get_bytes_per_sample(format); |
| |
| for (i = 0; i < filter->output_count; i++) { |
| AVFilterLink *outlink = filter->outputs[i]; |
| int best_idx, best_score = INT_MIN; |
| |
| if (outlink->type != AVMEDIA_TYPE_AUDIO || |
| outlink->in_formats->format_count < 2) |
| continue; |
| |
| for (j = 0; j < outlink->in_formats->format_count; 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; |
| } |
| } |
| 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->filter_count; 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->filter_count; i++) { |
| AVFilterContext *filter = graph->filters[i]; |
| if (filter->input_count){ |
| for (j = 0; j < filter->input_count; j++){ |
| if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) { |
| pick_format(filter->inputs[j], NULL); |
| change = 1; |
| } |
| } |
| } |
| if (filter->output_count){ |
| for (j = 0; j < filter->output_count; j++){ |
| if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) { |
| pick_format(filter->outputs[j], NULL); |
| change = 1; |
| } |
| } |
| } |
| if (filter->input_count && filter->output_count && filter->inputs[0]->format>=0) { |
| for (j = 0; j < filter->output_count; j++) { |
| if(filter->outputs[j]->format<0) { |
| pick_format(filter->outputs[j], filter->inputs[0]); |
| change = 1; |
| } |
| } |
| } |
| } |
| }while(change); |
| |
| for (i = 0; i < graph->filter_count; i++) { |
| AVFilterContext *filter = graph->filters[i]; |
| |
| for (j = 0; j < filter->input_count; j++) |
| if ((ret = pick_format(filter->inputs[j], NULL)) < 0) |
| return ret; |
| for (j = 0; j < filter->output_count; j++) |
| if ((ret = pick_format(filter->outputs[j], NULL)) < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| int ff_avfilter_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) |
| return ret; |
| |
| /* Once everything is merged, it's possible that we'll still have |
| * multiple valid media format choices. We try to minimize the amount |
| * of format conversion inside filters */ |
| reduce_formats(graph); |
| |
| /* for audio filters, ensure the best format, sample rate and channel layout |
| * is selected */ |
| swap_sample_fmts(graph); |
| swap_samplerates(graph); |
| swap_channel_layouts(graph); |
| |
| if ((ret = pick_formats(graph)) < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph, |
| AVClass *log_ctx) |
| { |
| unsigned i, j; |
| int sink_links_count = 0, n = 0; |
| AVFilterContext *f; |
| AVFilterLink **sinks; |
| |
| for (i = 0; i < graph->filter_count; i++) { |
| f = graph->filters[i]; |
| for (j = 0; j < f->input_count; j++) { |
| f->inputs[j]->graph = graph; |
| f->inputs[j]->age_index = -1; |
| } |
| for (j = 0; j < f->output_count; j++) { |
| f->outputs[j]->graph = graph; |
| f->outputs[j]->age_index= -1; |
| } |
| if (!f->output_count) { |
| if (f->input_count > INT_MAX - sink_links_count) |
| return AVERROR(EINVAL); |
| sink_links_count += f->input_count; |
| } |
| } |
| sinks = av_calloc(sink_links_count, sizeof(*sinks)); |
| if (!sinks) |
| return AVERROR(ENOMEM); |
| for (i = 0; i < graph->filter_count; i++) { |
| f = graph->filters[i]; |
| if (!f->output_count) { |
| for (j = 0; j < f->input_count; j++) { |
| sinks[n] = f->inputs[j]; |
| f->inputs[j]->age_index = n++; |
| } |
| } |
| } |
| av_assert0(n == sink_links_count); |
| graph->sink_links = sinks; |
| graph->sink_links_count = sink_links_count; |
| return 0; |
| } |
| |
| int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx) |
| { |
| int ret; |
| |
| if ((ret = ff_avfilter_graph_check_validity(graphctx, log_ctx))) |
| return ret; |
| if ((ret = ff_avfilter_graph_config_formats(graphctx, log_ctx))) |
| return ret; |
| if ((ret = ff_avfilter_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->filter_count; 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->filter_count; i++) { |
| AVFilterContext *filter = graph->filters[i]; |
| if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){ |
| AVFilterCommand **que = &filter->command_queue, *next; |
| while(*que && (*que)->time <= ts) |
| que = &(*que)->next; |
| next= *que; |
| *que= av_mallocz(sizeof(AVFilterCommand)); |
| (*que)->command = av_strdup(command); |
| (*que)->arg = av_strdup(arg); |
| (*que)->time = ts; |
| (*que)->flags = flags; |
| (*que)->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 = avfilter_request_frame(oldest); |
| if (r != AVERROR_EOF) |
| return r; |
| /* 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; |
| } |
