static int compat_read(AVFilterContext *ctx, AVFilterBufferRef **pbuf, int nb_samples) { AVFilterBufferRef *buf; AVFrame *frame; int ret; if (!pbuf) return ff_poll_frame(ctx->inputs[0]); frame = av_frame_alloc(); if (!frame) return AVERROR(ENOMEM); if (!nb_samples) ret = av_buffersink_get_frame(ctx, frame); else ret = av_buffersink_get_samples(ctx, frame, nb_samples); if (ret < 0) goto fail; if (ctx->inputs[0]->type == AVMEDIA_TYPE_VIDEO) { buf = avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, AV_PERM_READ, frame->width, frame->height, frame->format); } else { buf = avfilter_get_audio_buffer_ref_from_arrays(frame->extended_data, frame->linesize[0], AV_PERM_READ, frame->nb_samples, frame->format, frame->channel_layout); } if (!buf) { ret = AVERROR(ENOMEM); goto fail; } avfilter_copy_frame_props(buf, frame); buf->buf->priv = frame; buf->buf->free = compat_free_buffer; *pbuf = buf; return 0; fail: av_frame_free(&frame); return ret; }