AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask) { AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef)); if (!ret) return NULL; *ret = *ref; if (ref->type == AVMEDIA_TYPE_VIDEO) { ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps)); if (!ret->video) { av_free(ret); return NULL; } copy_video_props(ret->video, ref->video); ret->extended_data = ret->data; } else if (ref->type == AVMEDIA_TYPE_AUDIO) { ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps)); if (!ret->audio) { av_free(ret); return NULL; } *ret->audio = *ref->audio; if (ref->extended_data && ref->extended_data != ref->data) { int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout); if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) * nb_channels))) { av_freep(&ret->audio); av_freep(&ret); return NULL; } memcpy(ret->extended_data, ref->extended_data, sizeof(*ret->extended_data) * nb_channels); } else ret->extended_data = ret->data; } ret->perms &= pmask; ret->buf->refcount ++; return ret; }