int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter, AVFilterBufferRef *picref) { BufferSourceContext *c = buffer_filter->priv; AVFilterLink *outlink = buffer_filter->outputs[0]; int ret; if (c->picref) { av_log(buffer_filter, AV_LOG_ERROR, "Buffering several frames is not supported. " "Please consume all available frames before adding a new one.\n" ); //return -1; } if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) { AVFilterContext *scale = buffer_filter->outputs[0]->dst; AVFilterLink *link; char scale_param[1024]; av_log(buffer_filter, AV_LOG_INFO, "Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n", c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name, picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name); if (!scale || strcmp(scale->filter->name, "scale")) { AVFilter *f = avfilter_get_by_name("scale"); av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n"); if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0) return ret; snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param); if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) { avfilter_free(scale); return ret; } if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) { avfilter_free(scale); return ret; } scale->outputs[0]->time_base = scale->inputs[0]->time_base; scale->outputs[0]->format= c->pix_fmt; } else if (!strcmp(scale->filter->name, "scale")) { snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param); scale->filter->init(scale, scale_param, NULL); } c->pix_fmt = scale->inputs[0]->format = picref->format; c->w = scale->inputs[0]->w = picref->video->w; c->h = scale->inputs[0]->h = picref->video->h; link = scale->outputs[0]; if ((ret = link->srcpad->config_props(link)) < 0) return ret; } c->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, picref->video->w, picref->video->h); av_image_copy(c->picref->data, c->picref->linesize, picref->data, picref->linesize, picref->format, picref->video->w, picref->video->h); avfilter_copy_buffer_ref_props(c->picref, picref); return 0; }