| /* |
| * 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/avstring.h" |
| #include "avfilter.h" |
| #include "avfiltergraph.h" |
| #include "internal.h" |
| |
| AVFilterGraph *avfilter_graph_alloc(void) |
| { |
| return av_mallocz(sizeof(AVFilterGraph)); |
| } |
| |
| 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)->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; |
| } |
| |
| 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; |
| |
| 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]) && |
| (!avfilter_merge_formats(link->in_chlayouts, link->out_chlayouts) || |
| !avfilter_merge_formats(link->in_packing, link->out_packing))) || |
| ((link = filt_ctx->outputs[0]) && |
| (!avfilter_merge_formats(link->in_chlayouts, link->out_chlayouts) || |
| !avfilter_merge_formats(link->in_packing, link->out_packing)))) |
| ) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Impossible to convert between the channel layouts/packing 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]; |
| |
| /* 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 |
| avfilter_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 (!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 */ |
| av_strlcpy(filt_args, "0:0", sizeof(filt_args)); |
| if (graph->scale_sws_opts) { |
| av_strlcat(filt_args, ":", sizeof(filt_args)); |
| av_strlcat(filt_args, graph->scale_sws_opts, sizeof(filt_args)); |
| } |
| |
| if (ret = insert_conv_filter(graph, link, "scale", filt_args)) |
| return ret; |
| } |
| else if (link->type == AVMEDIA_TYPE_AUDIO) { |
| if (!link->in_chlayouts || !link->out_chlayouts || |
| !link->in_packing || !link->out_packing) |
| return AVERROR(EINVAL); |
| |
| if (!avfilter_merge_formats(link->in_formats, link->out_formats) || |
| !avfilter_merge_formats(link->in_chlayouts, link->out_chlayouts) || |
| !avfilter_merge_formats(link->in_packing, link->out_packing)) |
| if (ret = insert_conv_filter(graph, link, "aconvert", NULL)) |
| return ret; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void pick_format(AVFilterLink *link) |
| { |
| if (!link || !link->in_formats) |
| return; |
| |
| link->in_formats->format_count = 1; |
| link->format = link->in_formats->formats[0]; |
| avfilter_formats_unref(&link->in_formats); |
| avfilter_formats_unref(&link->out_formats); |
| |
| if (link->type == AVMEDIA_TYPE_AUDIO) { |
| link->in_chlayouts->format_count = 1; |
| link->channel_layout = link->in_chlayouts->formats[0]; |
| avfilter_formats_unref(&link->in_chlayouts); |
| avfilter_formats_unref(&link->out_chlayouts); |
| |
| link->in_packing->format_count = 1; |
| link->planar = link->in_packing->formats[0] == AVFILTER_PLANAR; |
| avfilter_formats_unref(&link->in_packing); |
| avfilter_formats_unref(&link->out_packing); |
| } |
| } |
| |
| static void pick_formats(AVFilterGraph *graph) |
| { |
| int i, j; |
| |
| for (i = 0; i < graph->filter_count; i++) { |
| AVFilterContext *filter = graph->filters[i]; |
| |
| for (j = 0; j < filter->input_count; j++) |
| pick_format(filter->inputs[j]); |
| for (j = 0; j < filter->output_count; j++) |
| pick_format(filter->outputs[j]); |
| } |
| } |
| |
| 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 pick the first one. */ |
| pick_formats(graph); |
| |
| 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; |
| |
| 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; |
| } |