diff options
Diffstat (limited to 'ffmpeg/libavfilter/avfiltergraph.c')
| -rw-r--r-- | ffmpeg/libavfilter/avfiltergraph.c | 1073 |
1 files changed, 1073 insertions, 0 deletions
diff --git a/ffmpeg/libavfilter/avfiltergraph.c b/ffmpeg/libavfilter/avfiltergraph.c new file mode 100644 index 0000000..89cdda3 --- /dev/null +++ b/ffmpeg/libavfilter/avfiltergraph.c @@ -0,0 +1,1073 @@ +/* + * 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 <string.h> + +#include "libavutil/avassert.h" +#include "libavutil/channel_layout.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2() +#include "avfilter.h" +#include "avfiltergraph.h" +#include "formats.h" +#include "internal.h" + +#define OFFSET(x) offsetof(AVFilterGraph,x) + +static const AVOption options[]={ +{"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, +{"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, +{0} +}; + + +static const AVClass filtergraph_class = { + .class_name = "AVFilterGraph", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, + .category = AV_CLASS_CATEGORY_FILTER, +}; + +AVFilterGraph *avfilter_graph_alloc(void) +{ + AVFilterGraph *ret = av_mallocz(sizeof(*ret)); + if (!ret) + return NULL; + ret->av_class = &filtergraph_class; + return ret; +} + +void avfilter_graph_free(AVFilterGraph **graph) +{ + if (!*graph) + return; + for (; (*graph)->nb_filters > 0; (*graph)->nb_filters--) + avfilter_free((*graph)->filters[(*graph)->nb_filters - 1]); + 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); +} + +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; + + 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; +} + +/** + * 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, 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) { + av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n", + ctx->name, av_err2str(ret)); + return ret; + } + + for (i = 0; i < ctx->nb_inputs; i++) + sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts); + for (i = 0; i < ctx->nb_outputs; i++) + sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts); + + formats = ff_all_formats(type); + if (!formats) + return AVERROR(ENOMEM); + ff_set_common_formats(ctx, formats); + if (type == AVMEDIA_TYPE_AUDIO) { + samplerates = ff_all_samplerates(); + if (!samplerates) + return AVERROR(ENOMEM); + ff_set_common_samplerates(ctx, samplerates); + chlayouts = ff_all_channel_layouts(); + if (!chlayouts) + return AVERROR(ENOMEM); + ff_set_common_channel_layouts(ctx, chlayouts); + } + return 0; +} + +static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) +{ + int i, j, ret; + int scaler_count = 0, resampler_count = 0; + + for (j = 0; j < 2; j++) { + /* ask all the sub-filters for their supported media formats */ + for (i = 0; i < graph->nb_filters; i++) { + /* Call query_formats on sources first. + This is a temporary workaround for amerge, + until format renegociation is implemented. */ + if (!graph->filters[i]->nb_inputs == j) + continue; + if (graph->filters[i]->filter->query_formats) + ret = filter_query_formats(graph->filters[i]); + else + ret = ff_default_query_formats(graph->filters[i]); + if (ret < 0) + return ret; + } + } + + /* 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, + link->type)) + 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: + 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 (graph->scale_sws_opts) + snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts); + else + snprintf(scale_args, sizeof(scale_args), "0:0"); + + 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("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; + + filter_query_formats(convert); + inlink = convert->inputs[0]; + outlink = convert->outputs[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; + } + } + } + } + + 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_desc_get(ref->format)->nb_components % 2 == 0; + enum AVPixelFormat best= AV_PIX_FMT_NONE; + int i; + for (i=0; i<link->in_formats->format_count; i++) { + enum AVPixelFormat p = link->in_formats->formats[i]; + best= avcodec_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL); + } + av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n", + av_get_pix_fmt_name(best), link->in_formats->format_count, + av_get_pix_fmt_name(ref->format), has_alpha); + link->in_formats->formats[0] = best; + } + } + + link->in_formats->format_count = 1; + link->format = link->in_formats->formats[0]; + + 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->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); + 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) \ +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 channel layouts */ + for (i = 0; i < filter->nb_inputs; i++) { + AVFilterLink *inlink = filter->inputs[i]; + uint64_t fmt; + + if (!inlink->out_channel_layouts || + inlink->out_channel_layouts->nb_channel_layouts != 1) + continue; + fmt = inlink->out_channel_layouts->channel_layouts[0]; + + for (j = 0; j < filter->nb_outputs; j++) { + AVFilterLink *outlink = filter->outputs[j]; + AVFilterChannelLayouts *fmts; + + fmts = outlink->in_channel_layouts; + if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1) + continue; + + if (fmts->all_layouts) { + /* Turn the infinite list into a singleton */ + fmts->all_layouts = fmts->all_counts = 0; + ff_add_channel_layout(&outlink->in_channel_layouts, fmt); + break; + } + + for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) { + if (fmts->channel_layouts[k] == fmt) { + fmts->channel_layouts[0] = fmt; + fmts->nb_channel_layouts = 1; + ret = 1; + break; + } + } + } + } + + return ret; +} + +static void reduce_formats(AVFilterGraph *graph) +{ + int i, reduced; + + do { + reduced = 0; + + for (i = 0; i < graph->nb_filters; 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->nb_inputs; i++) { + link = filter->inputs[i]; + + if (link->type == AVMEDIA_TYPE_AUDIO && + link->out_samplerates->format_count == 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->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->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->format_count == 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->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; + } + } + 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->format_count == 1) { + if ((ret = pick_format(filter->inputs[j], NULL)) < 0) + return ret; + change = 1; + } + } + } + if (filter->nb_outputs){ + for (j = 0; j < filter->nb_outputs; j++){ + if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) { + if ((ret = pick_format(filter->outputs[j], NULL)) < 0) + return ret; + change = 1; + } + } + } + if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) { + for (j = 0; j < filter->nb_outputs; j++) { + if(filter->outputs[j]->format<0) { + if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0) + return ret; + change = 1; + } + } + } + } + }while(change); + + for (i = 0; i < graph->nb_filters; i++) { + AVFilterContext *filter = graph->filters[i]; + + for (j = 0; j < filter->nb_inputs; j++) + if ((ret = pick_format(filter->inputs[j], 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 */ + 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->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 = ff_avfilter_graph_config_pointers(graphctx, log_ctx))) + return ret; + + return 0; +} + +int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags) +{ + int i, r = AVERROR(ENOSYS); + + if(!graph) + return r; + + if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) { + r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST); + if(r != AVERROR(ENOSYS)) + return r; + } + + if(res_len && res) + res[0]= 0; + + for (i = 0; i < graph->nb_filters; i++) { + AVFilterContext *filter = graph->filters[i]; + if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){ + r = avfilter_process_command(filter, cmd, arg, res, res_len, flags); + if(r != AVERROR(ENOSYS)) { + if((flags & AVFILTER_CMD_FLAG_ONE) || r<0) + return r; + } + } + } + + return r; +} + +int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts) +{ + int i; + + if(!graph) + return 0; + + for (i = 0; i < graph->nb_filters; i++) { + AVFilterContext *filter = graph->filters[i]; + if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){ + AVFilterCommand **queue = &filter->command_queue, *next; + while (*queue && (*queue)->time <= ts) + queue = &(*queue)->next; + next = *queue; + *queue = av_mallocz(sizeof(AVFilterCommand)); + (*queue)->command = av_strdup(command); + (*queue)->arg = av_strdup(arg); + (*queue)->time = ts; + (*queue)->flags = flags; + (*queue)->next = next; + if(flags & AVFILTER_CMD_FLAG_ONE) + return 0; + } + } + + return 0; +} + +static void heap_bubble_up(AVFilterGraph *graph, + AVFilterLink *link, int index) +{ + AVFilterLink **links = graph->sink_links; + + while (index) { + int parent = (index - 1) >> 1; + if (links[parent]->current_pts >= link->current_pts) + break; + links[index] = links[parent]; + links[index]->age_index = index; + index = parent; + } + links[index] = link; + link->age_index = index; +} + +static void heap_bubble_down(AVFilterGraph *graph, + AVFilterLink *link, int index) +{ + AVFilterLink **links = graph->sink_links; + + while (1) { + int child = 2 * index + 1; + if (child >= graph->sink_links_count) + break; + if (child + 1 < graph->sink_links_count && + links[child + 1]->current_pts < links[child]->current_pts) + child++; + if (link->current_pts < links[child]->current_pts) + break; + links[index] = links[child]; + links[index]->age_index = index; + index = child; + } + links[index] = link; + link->age_index = index; +} + +void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link) +{ + heap_bubble_up (graph, link, link->age_index); + heap_bubble_down(graph, link, link->age_index); +} + + +int avfilter_graph_request_oldest(AVFilterGraph *graph) +{ + while (graph->sink_links_count) { + AVFilterLink *oldest = graph->sink_links[0]; + int r = ff_request_frame(oldest); + if (r != AVERROR_EOF) + return r; + av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n", + oldest->dst ? oldest->dst->name : "unknown", + oldest->dstpad ? oldest->dstpad->name : "unknown"); + /* EOF: remove the link from the heap */ + if (oldest->age_index < --graph->sink_links_count) + heap_bubble_down(graph, graph->sink_links[graph->sink_links_count], + oldest->age_index); + oldest->age_index = -1; + } + return AVERROR_EOF; +} |