static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags) { if (!strcmp(cmd, "map")) { int ret = parse_mapping(ctx, args); if (ret < 0) return ret; return avfilter_config_links(ctx); } return AVERROR(ENOSYS); }
/** * 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->filter_count; i++) { filt = graph->filters[i]; if (!filt->nb_outputs) { if ((ret = avfilter_config_links(filt))) return ret; } } return 0; }
int avfilter_config_links(AVFilterContext *filter) { int (*config_link)(AVFilterLink *); unsigned i; int ret; for (i = 0; i < filter->input_count; i ++) { AVFilterLink *link = filter->inputs[i]; if (!link) continue; switch (link->init_state) { case AVLINK_INIT: continue; case AVLINK_STARTINIT: av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); return 0; case AVLINK_UNINIT: link->init_state = AVLINK_STARTINIT; if ((ret = avfilter_config_links(link->src)) < 0) return ret; if (!(config_link = link->srcpad->config_props)) config_link = avfilter_default_config_output_link; if ((ret = config_link(link)) < 0) return ret; if (link->time_base.num == 0 && link->time_base.den == 0) link->time_base = link->src && link->src->input_count ? link->src->inputs[0]->time_base : AV_TIME_BASE_Q; if (link->sample_aspect_ratio.num == 0 && link->sample_aspect_ratio.den == 0) link->sample_aspect_ratio = link->src->input_count ? link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1}; if ((config_link = link->dstpad->config_props)) if ((ret = config_link(link)) < 0) return ret; link->init_state = AVLINK_INIT; } } return 0; }
int avfilter_config_links(AVFilterContext *filter) { int (*config_link)(AVFilterLink *); unsigned i; int ret; for (i = 0; i < filter->nb_inputs; i ++) { AVFilterLink *link = filter->inputs[i]; AVFilterLink *inlink; if (!link) continue; if (!link->src || !link->dst) { av_log(filter, AV_LOG_ERROR, "Not all input and output are properly linked (%d).\n", i); return AVERROR(EINVAL); } inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL; link->current_pts = AV_NOPTS_VALUE; switch (link->init_state) { case AVLINK_INIT: continue; case AVLINK_STARTINIT: av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); return 0; case AVLINK_UNINIT: link->init_state = AVLINK_STARTINIT; if ((ret = avfilter_config_links(link->src)) < 0) return ret; if (!(config_link = link->srcpad->config_props)) { if (link->src->nb_inputs != 1) { av_log(link->src, AV_LOG_ERROR, "Source filters and filters " "with more than one input " "must set config_props() " "callbacks on all outputs\n"); return AVERROR(EINVAL); } } else if ((ret = config_link(link)) < 0) { av_log(link->src, AV_LOG_ERROR, "Failed to configure output pad on %s\n", link->src->name); return ret; } switch (link->type) { case AVMEDIA_TYPE_VIDEO: if (!link->time_base.num && !link->time_base.den) link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q; if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den) link->sample_aspect_ratio = inlink ? inlink->sample_aspect_ratio : (AVRational){1,1}; if (inlink && !link->frame_rate.num && !link->frame_rate.den) link->frame_rate = inlink->frame_rate; if (inlink) { if (!link->w) link->w = inlink->w; if (!link->h) link->h = inlink->h; } else if (!link->w || !link->h) { av_log(link->src, AV_LOG_ERROR, "Video source filters must set their output link's " "width and height\n"); return AVERROR(EINVAL); } break; case AVMEDIA_TYPE_AUDIO: if (inlink) { if (!link->time_base.num && !link->time_base.den) link->time_base = inlink->time_base; } if (!link->time_base.num && !link->time_base.den) link->time_base = (AVRational) {1, link->sample_rate}; } if ((config_link = link->dstpad->config_props)) if ((ret = config_link(link)) < 0) { av_log(link->dst, AV_LOG_ERROR, "Failed to configure input pad on %s\n", link->dst->name); return ret; } link->init_state = AVLINK_INIT; } } return 0; }
int avfilter_config_links(AVFilterContext *filter) { int (*config_link)(AVFilterLink *); unsigned i; int ret; for (i = 0; i < filter->nb_inputs; i ++) { AVFilterLink *link = filter->inputs[i]; if (!link) continue; switch (link->init_state) { case AVLINK_INIT: continue; case AVLINK_STARTINIT: av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); return 0; case AVLINK_UNINIT: link->init_state = AVLINK_STARTINIT; if ((ret = avfilter_config_links(link->src)) < 0) return ret; if (!(config_link = link->srcpad->config_props)) { if (link->src->nb_inputs != 1) { av_log(link->src, AV_LOG_ERROR, "Source filters and filters " "with more than one input " "must set config_props() " "callbacks on all outputs\n"); return AVERROR(EINVAL); } } else if ((ret = config_link(link)) < 0) { av_log(link->src, AV_LOG_ERROR, "Failed to configure output pad on %s\n", link->src->name); return ret; } if (link->time_base.num == 0 && link->time_base.den == 0) link->time_base = link->src && link->src->nb_inputs ? link->src->inputs[0]->time_base : AV_TIME_BASE_Q; if (link->type == AVMEDIA_TYPE_VIDEO) { if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den) link->sample_aspect_ratio = link->src->nb_inputs ? link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1}; if (link->src->nb_inputs) { if (!link->w) link->w = link->src->inputs[0]->w; if (!link->h) link->h = link->src->inputs[0]->h; } else if (!link->w || !link->h) { av_log(link->src, AV_LOG_ERROR, "Video source filters must set their output link's " "width and height\n"); return AVERROR(EINVAL); } } if ((config_link = link->dstpad->config_props)) if ((ret = config_link(link)) < 0) { av_log(link->src, AV_LOG_ERROR, "Failed to configure input pad on %s\n", link->dst->name); return ret; } link->init_state = AVLINK_INIT; } } return 0; }
int avfilter_config_links(AVFilterContext *filter) { int (*config_link)(AVFilterLink *); unsigned i; int ret; for (i = 0; i < filter->nb_inputs; i ++) { AVFilterLink *link = filter->inputs[i]; if (!link) continue; if (!link->src || !link->dst) { av_log(filter, AV_LOG_ERROR, "Not all input and output are properly linked (%d).\n", i); return AVERROR(EINVAL); } switch (link->init_state) { case AVLINK_INIT: continue; case AVLINK_STARTINIT: av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); return 0; case AVLINK_UNINIT: link->init_state = AVLINK_STARTINIT; if ((ret = avfilter_config_links(link->src)) < 0) return ret; if (!(config_link = link->srcpad->config_props)) { if (link->src->nb_inputs != 1) { av_log(link->src, AV_LOG_ERROR, "Source filters and filters " "with more than one input " "must set config_props() " "callbacks on all outputs\n"); return AVERROR(EINVAL); } } else if ((ret = config_link(link)) < 0) { av_log(link->src, AV_LOG_ERROR, "Failed to configure output pad on %s\n", link->src->name); return ret; } if (link->time_base.num == 0 && link->time_base.den == 0) link->time_base = link->src->nb_inputs ? link->src->inputs[0]->time_base : AV_TIME_BASE_Q; if (link->type == AVMEDIA_TYPE_VIDEO) { if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den) link->sample_aspect_ratio = link->src->nb_inputs ? link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1}; if (link->src->nb_inputs) { if (!link->frame_rate.num && !link->frame_rate.den) link->frame_rate = link->src->inputs[0]->frame_rate; if (!link->w) link->w = link->src->inputs[0]->w; if (!link->h) link->h = link->src->inputs[0]->h; } else if (!link->w || !link->h) { av_log(link->src, AV_LOG_ERROR, "Video source filters must set their output link's " "width and height\n"); return AVERROR(EINVAL); } } if (link->src->nb_inputs && link->src->inputs[0]->hw_frames_ctx && !(link->src->filter->flags_internal & FF_FILTER_FLAG_HWFRAME_AWARE)) { av_assert0(!link->hw_frames_ctx && "should not be set by non-hwframe-aware filter"); link->hw_frames_ctx = av_buffer_ref(link->src->inputs[0]->hw_frames_ctx); if (!link->hw_frames_ctx) return AVERROR(ENOMEM); } if ((config_link = link->dstpad->config_props)) if ((ret = config_link(link)) < 0) { av_log(link->dst, AV_LOG_ERROR, "Failed to configure input pad on %s\n", link->dst->name); return ret; } link->init_state = AVLINK_INIT; } } return 0; }