void set_context_opts(void *ctx, void *opts_ctx, int flags, AVCodec *codec) { int i; void *priv_ctx=NULL; if(!strcmp("AVCodecContext", (*(AVClass**)ctx)->class_name)){ AVCodecContext *avctx= ctx; if(codec && codec->priv_class && avctx->priv_data){ priv_ctx= avctx->priv_data; } } else if (!strcmp("AVFormatContext", (*(AVClass**)ctx)->class_name)) { AVFormatContext *avctx = ctx; if (avctx->oformat && avctx->oformat->priv_class) { priv_ctx = avctx->priv_data; } } for(i=0; i<opt_name_count; i++){ char buf[256]; const AVOption *opt; const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf)); /* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */ if(str && ((opt->flags & flags) == flags)) av_set_string3(ctx, opt_names[i], str, 1, NULL); /* We need to use a differnt system to pass options to the private context because it is not known which codec and thus context kind that will be when parsing options we thus use opt_values directly instead of opts_ctx */ if(!str && priv_ctx) { if (av_find_opt(priv_ctx, opt_names[i], NULL, flags, flags)) av_set_string3(priv_ctx, opt_names[i], opt_values[i], 0, NULL); } } }