X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Favfiltergraph.c;h=516617e62bd9e336d4d1fe3517087a69eaa3430a;hb=3d8c80b611aa1e2f800dd9c8d8f350407f95c042;hp=0a0108eb0c3d32462253884cdfc9ac370519ceeb;hpb=5a1dacda9d0eacd4031fa6b9f5a7758063f99388;p=ffmpeg diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c index 0a0108eb0c3..516617e62bd 100644 --- a/libavfilter/avfiltergraph.c +++ b/libavfilter/avfiltergraph.c @@ -1,699 +1,713 @@ /* - * Filter graphs - * copyright (c) 2007 Bobby Bingham + * filter graphs + * Copyright (c) 2008 Vitor Sessak + * Copyright (c) 2007 Bobby Bingham * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include -#include -#include "avstring.h" +#include "libavutil/avassert.h" +#include "libavutil/channel_layout.h" +#include "libavutil/common.h" +#include "libavutil/log.h" #include "avfilter.h" #include "avfiltergraph.h" +#include "formats.h" +#include "internal.h" -#include "allfilters.h" - -typedef struct AVFilterGraph { - unsigned filter_count; - AVFilterContext **filters; - - /** fake filter to handle links to internal filters */ - AVFilterContext *link_filter; -} GraphContext; - -typedef struct { - AVFilterContext *graph; -} GraphLinkContext; +static const AVClass filtergraph_class = { + .class_name = "AVFilterGraph", + .item_name = av_default_item_name, + .version = LIBAVUTIL_VERSION_INT, +}; -static int link_init(AVFilterContext *ctx, const char *args, void *opaque) +AVFilterGraph *avfilter_graph_alloc(void) { - GraphLinkContext *linkctx = ctx->priv; - linkctx->graph = opaque; - return !opaque; + AVFilterGraph *ret = av_mallocz(sizeof(*ret)); + if (!ret) + return NULL; + ret->av_class = &filtergraph_class; + return ret; } -/** - * Given the link between the dummy filter and an internal filter whose input - * is being exported outside the graph, this returns the externally visible - * link - */ -static inline AVFilterLink *get_extern_input_link(AVFilterLink *link) +void avfilter_graph_free(AVFilterGraph **graph) { - GraphLinkContext *lctx = link->src->priv; - return lctx->graph->inputs[link->srcpad]; + if (!*graph) + return; + for (; (*graph)->nb_filters > 0; (*graph)->nb_filters--) + avfilter_free((*graph)->filters[(*graph)->nb_filters - 1]); + av_freep(&(*graph)->scale_sws_opts); + av_freep(&(*graph)->resample_lavr_opts); + av_freep(&(*graph)->filters); + av_freep(graph); } -/** query the formats supported by a filter providing input to the graph */ -static int *link_in_query_formats(AVFilterLink *link) +int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) { - AVFilterLink *link2 = get_extern_input_link(link); - int *(*query_formats)(AVFilterLink *); - - if(!link2) - return avfilter_make_format_list(0); + AVFilterContext **filters = av_realloc(graph->filters, + sizeof(*filters) * (graph->nb_filters + 1)); + if (!filters) + return AVERROR(ENOMEM); - if(!(query_formats = link2->src->output_pads[link2->srcpad].query_formats)) - query_formats = avfilter_default_query_output_formats; + graph->filters = filters; + graph->filters[graph->nb_filters++] = filter; - return query_formats(link2); -} - -/** request a frame from a filter providing input to the graph */ -static int link_in_request_frame(AVFilterLink *link) -{ - AVFilterLink *link2 = get_extern_input_link(link); - - if(!link2) - return -1; - return avfilter_request_frame(link2); + return 0; } -static int link_in_config_props(AVFilterLink *link) +int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt, + const char *name, const char *args, void *opaque, + AVFilterGraph *graph_ctx) { - AVFilterLink *link2 = get_extern_input_link(link); - int (*config_props)(AVFilterLink *); int ret; - if(!link2) - return -1; - if(!(config_props = link2->src->output_pads[link2->srcpad].config_props)) - config_props = avfilter_default_config_output_link; - ret = config_props(link2); - - link->w = link2->w; - link->h = link2->h; + 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; } /** - * Given the link between the dummy filter and an internal filter whose input - * is being exported outside the graph, this returns the externally visible - * link + * 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 inline AVFilterLink *get_extern_output_link(AVFilterLink *link) -{ - GraphLinkContext *lctx = link->dst->priv; - return lctx->graph->outputs[link->dstpad]; -} - -/** query the formats supported by a filter taking output from the graph */ -static int *link_out_query_formats(AVFilterLink *link) +static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx) { - AVFilterLink *link2 = get_extern_output_link(link); - - if(!link2) - return avfilter_make_format_list(0); - - return link2->dst->input_pads[link2->dstpad].query_formats(link2); -} + AVFilterContext *filt; + int i, j; -static int link_out_config_props(AVFilterLink *link) -{ - AVFilterLink *link2 = get_extern_output_link(link); - int (*config_props)(AVFilterLink *); + for (i = 0; i < graph->nb_filters; i++) { + filt = graph->filters[i]; - if(!link2) - return 0; + for (j = 0; j < filt->nb_inputs; 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); + } + } - link2->w = link->w; - link2->h = link->h; + for (j = 0; j < filt->nb_outputs; 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); + } + } + } - if(!(config_props = link2->dst->input_pads[link2->dstpad].config_props)) - config_props = avfilter_default_config_input_link; - return config_props(link2); + return 0; } -static void link_out_start_frame(AVFilterLink *link, AVFilterPicRef *picref) +/** + * 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) { - AVFilterLink *link2 = get_extern_output_link(link); + AVFilterContext *filt; + int i, ret; - if(!link2) - avfilter_unref_pic(picref); - else - avfilter_start_frame(link2, picref); -} + for (i = 0; i < graph->nb_filters; i++) { + filt = graph->filters[i]; -static void link_out_end_frame(AVFilterLink *link) -{ - AVFilterLink *link2 = get_extern_output_link(link); + if (!filt->nb_outputs) { + if ((ret = avfilter_config_links(filt))) + return ret; + } + } - if(link2) - avfilter_end_frame(link2); + return 0; } -static AVFilterPicRef *link_out_get_video_buffer(AVFilterLink *link, int perms) +AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name) { - AVFilterLink *link2 = get_extern_output_link(link); - - if(!link2) - return NULL; - else - return avfilter_get_video_buffer(link2, perms); -} + int i; -static void link_out_draw_slice(AVFilterLink *link, int y, int height) -{ - AVFilterLink *link2 = get_extern_output_link(link); + for (i = 0; i < graph->nb_filters; i++) + if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name)) + return graph->filters[i]; - if(link2) - avfilter_draw_slice(link2, y, height); + return NULL; } -/** dummy filter used to help export filters pads outside the graph */ -static AVFilter vf_graph_dummy = +static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) { - .name = "graph_dummy", - .author = "Bobby Bingham", + int i, j, ret; + int scaler_count = 0, resampler_count = 0; - .priv_size = sizeof(GraphLinkContext), - - .init = link_init, - //.uninit = uninit, + /* 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]); + else + ff_default_query_formats(graph->filters[i]); + } - .inputs = (AVFilterPad[]) {{ .name = NULL, }}, - .outputs = (AVFilterPad[]) {{ .name = NULL, }}, -}; + /* 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 && + !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)) + convert_needed = 1; + } -static AVFilterLink *get_intern_input_link(AVFilterLink *link) -{ - GraphContext *graph = link->dst->priv; - return graph->link_filter->outputs[link->dstpad]; -} + 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++); + snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts); + if ((ret = avfilter_graph_create_filter(&convert, filter, + inst_name, scale_args, NULL, + graph)) < 0) + return ret; + break; + case AVMEDIA_TYPE_AUDIO: + if (!(filter = avfilter_get_by_name("resample"))) { + 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++); + scale_args[0] = '\0'; + if (graph->resample_lavr_opts) + snprintf(scale_args, sizeof(scale_args), "%s", + graph->resample_lavr_opts); + if ((ret = avfilter_graph_create_filter(&convert, filter, + inst_name, scale_args, + 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 (!ff_merge_formats( inlink->in_formats, inlink->out_formats) || + !ff_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; + } + } + } + } -static void graph_in_start_frame(AVFilterLink *link, AVFilterPicRef *picref) -{ - AVFilterLink *link2 = get_intern_input_link(link); - if(link2) - avfilter_start_frame(link2, picref); + return 0; } -static void graph_in_end_frame(AVFilterLink *link) +static int pick_format(AVFilterLink *link) { - AVFilterLink *link2 = get_intern_input_link(link); - if(link2) - avfilter_end_frame(link2); -} + if (!link || !link->in_formats) + return 0; -static AVFilterPicRef *graph_in_get_video_buffer(AVFilterLink *link, int perms) -{ - AVFilterLink *link2 = get_intern_input_link(link); - if(link2) - return avfilter_get_video_buffer(link2, perms); - return NULL; -} + link->in_formats->format_count = 1; + link->format = link->in_formats->formats[0]; -static void graph_in_draw_slice(AVFilterLink *link, int y, int height) -{ - AVFilterLink *link2 = get_intern_input_link(link); - if(link2) - avfilter_draw_slice(link2, y, height); -} + 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]; + } -static int *graph_in_query_formats(AVFilterLink *link) -{ - AVFilterLink *link2 = get_intern_input_link(link); + 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); - if(!link2 || !link2->dst->input_pads[link2->dstpad].query_formats) - return avfilter_make_format_list(0); - return link2->dst->input_pads[link2->dstpad].query_formats(link2); + return 0; } -static int graph_in_config_props(AVFilterLink *link) -{ - AVFilterLink *link2 = get_intern_input_link(link); - int (*config_props)(AVFilterLink *); - - if(!link2) - return -1; - - /* copy link properties over to the dummy internal link */ - link2->w = link->w; - link2->h = link->h; - link2->format = link->format; +#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \ +do { \ + for (i = 0; i < filter->nb_inputs; i++) { \ + AVFilterLink *link = filter->inputs[i]; \ + fmt_type fmt; \ + \ + if (!link->out_ ## list || link->out_ ## list->nb != 1) \ + continue; \ + fmt = link->out_ ## list->var[0]; \ + \ + for (j = 0; j < filter->nb_outputs; j++) { \ + AVFilterLink *out_link = filter->outputs[j]; \ + list_type *fmts; \ + \ + if (link->type != out_link->type || \ + out_link->in_ ## list->nb == 1) \ + continue; \ + fmts = out_link->in_ ## list; \ + \ + if (!out_link->in_ ## list->nb) { \ + add_format(&out_link->in_ ##list, fmt); \ + 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, 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); - if(!(config_props = link2->dst->input_pads[link2->dstpad].config_props)) - return 0; /* FIXME? */ - //config_props = avfilter_default_config_input_link; - return config_props(link2); + return ret; } -static AVFilterLink *get_intern_output_link(AVFilterLink *link) +static void reduce_formats(AVFilterGraph *graph) { - GraphContext *graph = link->src->priv; - return graph->link_filter->inputs[link->srcpad]; -} + int i, reduced; -static int *graph_out_query_formats(AVFilterLink *link) -{ - AVFilterLink *link2 = get_intern_output_link(link); + do { + reduced = 0; - if(!link2) - return avfilter_make_format_list(0); - if(!link2->src->output_pads[link2->srcpad].query_formats) - return avfilter_default_query_output_formats(link2); - return link2->src->output_pads[link2->srcpad].query_formats(link2); + for (i = 0; i < graph->nb_filters; i++) + reduced |= reduce_formats_on_filter(graph->filters[i]); + } while (reduced); } -static int graph_out_request_frame(AVFilterLink *link) +static void swap_samplerates_on_filter(AVFilterContext *filter) { - AVFilterLink *link2 = get_intern_output_link(link); + AVFilterLink *link = NULL; + int sample_rate; + int i, j; - if(link2) - return avfilter_request_frame(link2); - return -1; -} + for (i = 0; i < filter->nb_inputs; i++) { + link = filter->inputs[i]; -static int graph_out_config_props(AVFilterLink *link) -{ - AVFilterLink *link2 = get_intern_output_link(link); - int (*config_props)(AVFilterLink *); - int ret; + if (link->type == AVMEDIA_TYPE_AUDIO && + link->out_samplerates->format_count == 1) + break; + } + if (i == filter->nb_inputs) + return; - if(!link2) - return 0; + sample_rate = link->out_samplerates->formats[0]; - link2->w = link->w; - link2->h = link->h; - link2->format = link->format; + for (i = 0; i < filter->nb_outputs; i++) { + AVFilterLink *outlink = filter->outputs[i]; + int best_idx, best_diff = INT_MAX; - if(!(config_props = link2->src->output_pads[link2->srcpad].config_props)) - config_props = avfilter_default_config_output_link; - ret = config_props(link2); + if (outlink->type != AVMEDIA_TYPE_AUDIO || + outlink->in_samplerates->format_count < 2) + continue; - link->w = link2->w; - link->h = link2->h; - link->format = link2->format; + for (j = 0; j < outlink->in_samplerates->format_count; j++) { + int diff = abs(sample_rate - outlink->in_samplerates->formats[j]); - return ret; + if (diff < best_diff) { + best_diff = diff; + best_idx = j; + } + } + FFSWAP(int, outlink->in_samplerates->formats[0], + outlink->in_samplerates->formats[best_idx]); + } } -static int add_graph_input(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx, - char *name) +static void swap_samplerates(AVFilterGraph *graph) { - GraphContext *graph = gctx->priv; - - AVFilterPad graph_inpad = - { - .name = name, - .type = AV_PAD_VIDEO, - .start_frame = graph_in_start_frame, - .end_frame = graph_in_end_frame, - .get_video_buffer = graph_in_get_video_buffer, - .draw_slice = graph_in_draw_slice, - .query_formats = graph_in_query_formats, - .config_props = graph_in_config_props, - /* XXX */ - }; - AVFilterPad dummy_outpad = - { - .name = NULL, /* FIXME? */ - .type = AV_PAD_VIDEO, - .query_formats = link_in_query_formats, - .request_frame = link_in_request_frame, - .config_props = link_in_config_props, - }; - - avfilter_insert_inpad (gctx, gctx->input_count, &graph_inpad); - avfilter_insert_outpad(graph->link_filter, graph->link_filter->output_count, - &dummy_outpad); - return avfilter_link(graph->link_filter, - graph->link_filter->output_count-1, filt, idx); -} + int i; -static int add_graph_output(AVFilterContext *gctx, AVFilterContext *filt, unsigned idx, - char *name) -{ - GraphContext *graph = gctx->priv; - - AVFilterPad graph_outpad = - { - .name = name, - .type = AV_PAD_VIDEO, - .request_frame = graph_out_request_frame, - .query_formats = graph_out_query_formats, - .config_props = graph_out_config_props, - }; - AVFilterPad dummy_inpad = - { - .name = NULL, /* FIXME? */ - .type = AV_PAD_VIDEO, - .start_frame = link_out_start_frame, - .end_frame = link_out_end_frame, - .draw_slice = link_out_draw_slice, - .get_video_buffer = link_out_get_video_buffer, - .query_formats = link_out_query_formats, - .config_props = link_out_config_props, - }; - - avfilter_insert_outpad(gctx, gctx->output_count, &graph_outpad); - avfilter_insert_inpad (graph->link_filter, graph->link_filter->input_count, - &dummy_inpad); - return avfilter_link(filt, idx, graph->link_filter, - graph->link_filter->input_count-1); -} + 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 uninit(AVFilterContext *ctx) +static void swap_channel_layouts_on_filter(AVFilterContext *filter) { - GraphContext *graph = ctx->priv; + AVFilterLink *link = NULL; + int i, j, k; + + for (i = 0; i < filter->nb_inputs; i++) { + link = filter->inputs[i]; - if(graph->link_filter) { - avfilter_destroy(graph->link_filter); - graph->link_filter = NULL; + if (link->type == AVMEDIA_TYPE_AUDIO && + link->out_channel_layouts->nb_channel_layouts == 1) + break; } - for(; graph->filter_count > 0; graph->filter_count --) - avfilter_destroy(graph->filters[graph->filter_count - 1]); - av_freep(&graph->filters); -} + 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 = 0; + + /* 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; + } + } -/* TODO: insert in sorted order */ -void avfilter_graph_add_filter(AVFilterContext *graphctx, AVFilterContext *filter) -{ - GraphContext *graph = graphctx->priv; + /* 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]); + } - graph->filters = av_realloc(graph->filters, - sizeof(AVFilterContext*) * ++graph->filter_count); - graph->filters[graph->filter_count - 1] = filter; } -/* search intelligently, once we insert in order */ -AVFilterContext *avfilter_graph_get_filter(AVFilterContext *ctx, char *name) +static void swap_channel_layouts(AVFilterGraph *graph) { - GraphContext *graph = ctx->priv; int i; - if(!name) - return NULL; - - 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; + for (i = 0; i < graph->nb_filters; i++) + swap_channel_layouts_on_filter(graph->filters[i]); } -int avfilter_graph_config_links(AVFilterContext *graphctx) +static void swap_sample_fmts_on_filter(AVFilterContext *filter) { - GraphContext *graph = graphctx->priv; + AVFilterLink *link = NULL; + int format, bps; int i, j; - for(i = 0; i < graph->filter_count; i ++) { - for(j = 0; j < graph->filters[i]->input_count; j ++) { - /* ensure that graphs contained within graphs are configured */ - if((graph->filters[i]->filter == &avfilter_vf_graph || - graph->filters[i]->filter == &avfilter_vf_graphfile || - graph->filters[i]->filter == &avfilter_vf_graphdesc) && - avfilter_graph_config_links(graph->filters[i])) - return -1; - if(avfilter_config_link(graph->filters[i]->inputs[j])) - return -1; - } - } + for (i = 0; i < filter->nb_inputs; i++) { + link = filter->inputs[i]; - return 0; -} - -static AVFilterContext *create_filter_with_args(const char *filt, void *opaque) -{ - AVFilterContext *ret; - char *filter = av_strdup(filt); /* copy - don't mangle the input string */ - char *name, *args; + if (link->type == AVMEDIA_TYPE_AUDIO && + link->out_formats->format_count == 1) + break; + } + if (i == filter->nb_inputs) + return; - name = filter; - if((args = strchr(filter, '='))) { - /* ensure we at least have a name */ - if(args == filter) - goto fail; + format = link->out_formats->formats[0]; + bps = av_get_bytes_per_sample(format); - *args ++ = 0; - } + for (i = 0; i < filter->nb_outputs; i++) { + AVFilterLink *outlink = filter->outputs[i]; + int best_idx = -1, best_score = INT_MIN; - av_log(NULL, AV_LOG_INFO, "creating filter \"%s\" with args \"%s\"\n", - name, args ? args : "(none)"); + if (outlink->type != AVMEDIA_TYPE_AUDIO || + outlink->in_formats->format_count < 2) + continue; - if(ret = avfilter_open(avfilter_get_by_name(name), NULL)) { - if(avfilter_init_filter(ret, args, opaque)) { - av_log(NULL, AV_LOG_ERROR, "error initializing filter!\n"); - avfilter_destroy(ret); - goto fail; - } - } else av_log(NULL, AV_LOG_ERROR, "error creating filter!\n"); + 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; - av_free(filter); + if (av_get_packed_sample_fmt(out_format) == format || + av_get_planar_sample_fmt(out_format) == format) { + best_idx = j; + break; + } - return ret; + /* for s32 and float prefer double to prevent loss of information */ + if (bps == 4 && out_bps == 8) { + best_idx = j; + break; + } -fail: - av_free(filter); - return NULL; -} + /* prefer closest higher or equal bps */ + score = -abs(out_bps - bps); + if (out_bps >= bps) + score += INT_MAX/2; -static int graph_load_chain(AVFilterContext *graphctx, - unsigned count, char **filter_list, void **opaque, - AVFilterContext **first, AVFilterContext **last) -{ - unsigned i; - AVFilterContext *filters[2] = {NULL,NULL}; - - for(i = 0; i < count; i ++) { - void *op; - - if(opaque) op = opaque[i]; - else op = NULL; - - if(!(filters[1] = create_filter_with_args(filter_list[i], op))) - goto fail; - if(i == 0) { - if(first) *first = filters[1]; - } else { - if(avfilter_link(filters[0], 0, filters[1], 0)) { - av_log(NULL, AV_LOG_ERROR, "error linking filters!\n"); - goto fail; + if (score > best_score) { + best_score = score; + best_idx = j; } } - avfilter_graph_add_filter(graphctx, filters[1]); - if(i == 0 && filters[1]->input_count > 0) - add_graph_input(graphctx, filters[1], 0, "default"); - filters[0] = filters[1]; + av_assert0(best_idx >= 0); + FFSWAP(int, outlink->in_formats->formats[0], + outlink->in_formats->formats[best_idx]); } - - if(filters[1]->output_count > 0) - add_graph_output(graphctx, filters[1], 0, "default"); - - if(last) *last = filters[1]; - return 0; - -fail: - uninit(graphctx); - if(first) *first = NULL; - if(last) *last = NULL; - return -1; } -static int graph_load_chain_from_string(AVFilterContext *ctx, const char *str, - AVFilterContext **first, - AVFilterContext **last) +static void swap_sample_fmts(AVFilterGraph *graph) { - int count, ret = 0; - char **strings; - char *filt; - - strings = av_malloc(sizeof(char *)); - strings[0] = av_strdup(str); - - filt = strchr(strings[0], ','); - for(count = 1; filt; count ++) { - if(filt == strings[count-1]) { - ret = -1; - goto done; - } - - strings = av_realloc(strings, sizeof(char *) * (count+1)); - strings[count] = filt + 1; - *filt = '\0'; - filt = strchr(strings[count], ','); - } - - ret = graph_load_chain(ctx, count, strings, NULL, first, last); + int i; -done: - av_free(strings[0]); - av_free(strings); + for (i = 0; i < graph->nb_filters; i++) + swap_sample_fmts_on_filter(graph->filters[i]); - return ret; } -static int init(AVFilterContext *ctx, const char *args, void *opaque) +static int pick_formats(AVFilterGraph *graph) { - GraphContext *gctx = ctx->priv; - - if(!args) - return 0; - - if(!(gctx->link_filter = avfilter_open(&vf_graph_dummy, NULL))) - return -1; - if(avfilter_init_filter(gctx->link_filter, NULL, ctx)) - goto fail; + int i, j, ret; - return graph_load_chain_from_string(ctx, args, NULL, NULL); + for (i = 0; i < graph->nb_filters; i++) { + AVFilterContext *filter = graph->filters[i]; -fail: - avfilter_destroy(gctx->link_filter); - return -1; + for (j = 0; j < filter->nb_inputs; j++) + if ((ret = pick_format(filter->inputs[j])) < 0) + return ret; + for (j = 0; j < filter->nb_outputs; j++) + if ((ret = pick_format(filter->outputs[j])) < 0) + return ret; + } + return 0; } -AVFilter avfilter_vf_graph = +/** + * Configure the formats of all the links in the graph. + */ +static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) { - .name = "graph", - .author = "Bobby Bingham", + int ret; - .priv_size = sizeof(GraphContext), + /* find supported formats from sub-filters, and merge along links */ + if ((ret = query_formats(graph, log_ctx)) < 0) + return ret; - .init = init, - .uninit = uninit, + /* 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); - .inputs = (AVFilterPad[]) {{ .name = NULL, }}, - .outputs = (AVFilterPad[]) {{ .name = NULL, }}, -}; + /* 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); -static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc) -{ - AVFilterGraphDescFilter *curfilt; - AVFilterGraphDescLink *curlink; - AVFilterGraphDescExport *curpad; - AVFilterContext *filt, *filtb; - - AVFilter *filterdef; - - /* create all filters */ - for(curfilt = desc->filters; curfilt; curfilt = curfilt->next) { - if(!(filterdef = avfilter_get_by_name(curfilt->filter)) || - !(filt = avfilter_open(filterdef, curfilt->name))) { - av_log(ctx, AV_LOG_ERROR, "error creating filter\n"); - goto fail; - } - avfilter_graph_add_filter(ctx, filt); - if(avfilter_init_filter(filt, curfilt->args, NULL)) { - av_log(ctx, AV_LOG_ERROR, "error initializing filter\n"); - goto fail; - } - } - - /* create all links */ - for(curlink = desc->links; curlink; curlink = curlink->next) { - if(!(filt = avfilter_graph_get_filter(ctx, curlink->src))) { - av_log(ctx, AV_LOG_ERROR, "link source does not exist in graph\n"); - goto fail; - } - if(!(filtb = avfilter_graph_get_filter(ctx, curlink->dst))) { - av_log(ctx, AV_LOG_ERROR, "link destination does not exist in graph\n"); - goto fail; - } - if(avfilter_link(filt, curlink->srcpad, filtb, curlink->dstpad)) { - av_log(ctx, AV_LOG_ERROR, "cannot create link between source and destination filters\n"); - goto fail; - } - } - - /* export all input pads */ - for(curpad = desc->inputs; curpad; curpad = curpad->next) { - if(!(filt = avfilter_graph_get_filter(ctx, curpad->filter))) { - av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n"); - goto fail; - } - add_graph_input(ctx, filt, curpad->pad, curpad->name); - } - - /* export all output pads */ - for(curpad = desc->outputs; curpad; curpad = curpad->next) { - if(!(filt = avfilter_graph_get_filter(ctx, curpad->filter))) { - av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n"); - goto fail; - } - add_graph_output(ctx, filt, curpad->pad, curpad->name); - } + if ((ret = pick_formats(graph)) < 0) + return ret; return 0; - -fail: - uninit(ctx); - return -1; } -static int init_desc(AVFilterContext *ctx, const char *args, void *opaque) +static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx) { - GraphContext *gctx = ctx->priv; + AVFilterContext *f; + int i, j, ret; + int fifo_count = 0; - if(!opaque) - return -1; + for (i = 0; i < graph->nb_filters; i++) { + f = graph->filters[i]; - if(!(gctx->link_filter = avfilter_open(&vf_graph_dummy, NULL))) - return -1; - if(avfilter_init_filter(gctx->link_filter, NULL, ctx)) - goto fail; + for (j = 0; j < f->nb_inputs; j++) { + AVFilterLink *link = f->inputs[j]; + AVFilterContext *fifo_ctx; + AVFilter *fifo; + char name[32]; - return graph_load_from_desc(ctx, opaque); + if (!link->dstpad->needs_fifo) + continue; -fail: - avfilter_destroy(gctx->link_filter); - return -1; -} + fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ? + avfilter_get_by_name("fifo") : + avfilter_get_by_name("afifo"); -AVFilter avfilter_vf_graphdesc = -{ - .name = "graph_desc", - .author = "Bobby Bingham", + snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++); - .priv_size = sizeof(GraphContext), + ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL, + NULL, graph); + if (ret < 0) + return ret; - .init = init_desc, - .uninit = uninit, + ret = avfilter_insert_filter(link, fifo_ctx, 0, 0); + if (ret < 0) + return ret; + } + } - .inputs = (AVFilterPad[]) {{ .name = NULL, }}, - .outputs = (AVFilterPad[]) {{ .name = NULL, }}, -}; + return 0; +} -static int init_file(AVFilterContext *ctx, const char *args, void *opaque) +int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx) { - AVFilterGraphDesc *desc; int ret; - if(!args) - return -1; - if(!(desc = avfilter_graph_load_desc(args))) - return -1; + 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; - ret = init_desc(ctx, NULL, desc); - avfilter_graph_free_desc(desc); - return ret; + return 0; } - -AVFilter avfilter_vf_graphfile = -{ - .name = "graph_file", - .author = "Bobby Bingham", - - .priv_size = sizeof(GraphContext), - - .init = init_file, - .uninit = uninit, - - .inputs = (AVFilterPad[]) {{ .name = NULL, }}, - .outputs = (AVFilterPad[]) {{ .name = NULL, }}, -}; -