static int mp3_write_packet(AVFormatContext *s, AVPacket *pkt) { MP3Context *mp3 = s->priv_data; if (pkt->stream_index == mp3->audio_stream_idx) { if (mp3->pics_to_write) { /* buffer audio packets until we get all the pictures */ AVPacketList *pktl = av_mallocz(sizeof(*pktl)); if (!pktl) return AVERROR(ENOMEM); pktl->pkt = *pkt; pktl->pkt.buf = av_buffer_ref(pkt->buf); if (!pktl->pkt.buf) { av_freep(&pktl); return AVERROR(ENOMEM); } if (mp3->queue_end) mp3->queue_end->next = pktl; else mp3->queue = pktl; mp3->queue_end = pktl; } else return mp3_write_audio_packet(s, pkt); } else { int ret; /* warn only once for each stream */ if (s->streams[pkt->stream_index]->nb_frames == 1) { av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d," " ignoring.\n", pkt->stream_index); } if (!mp3->pics_to_write || s->streams[pkt->stream_index]->nb_frames >= 1) return 0; if ((ret = ff_id3v2_write_apic(s, &mp3->id3, pkt)) < 0) return ret; mp3->pics_to_write--; /* flush the buffered audio packets */ if (!mp3->pics_to_write && (ret = mp3_queue_flush(s)) < 0) return ret; } return 0; }