yading@11: /* yading@11: * AU muxer and demuxer yading@11: * Copyright (c) 2001 Fabrice Bellard yading@11: * yading@11: * first version by Francois Revol yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: /* yading@11: * Reference documents: yading@11: * http://www.opengroup.org/public/pubs/external/auformat.html yading@11: * http://www.goice.co.jp/member/mo/formats/au.html yading@11: */ yading@11: yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "avio_internal.h" yading@11: #include "pcm.h" yading@11: yading@11: /* if we don't know the size in advance */ yading@11: #define AU_UNKNOWN_SIZE ((uint32_t)(~0)) yading@11: /* the specification requires an annotation field of at least eight bytes */ yading@11: #define AU_HEADER_SIZE (24+8) yading@11: yading@11: static const AVCodecTag codec_au_tags[] = { yading@11: { AV_CODEC_ID_PCM_MULAW, 1 }, yading@11: { AV_CODEC_ID_PCM_S8, 2 }, yading@11: { AV_CODEC_ID_PCM_S16BE, 3 }, yading@11: { AV_CODEC_ID_PCM_S24BE, 4 }, yading@11: { AV_CODEC_ID_PCM_S32BE, 5 }, yading@11: { AV_CODEC_ID_PCM_F32BE, 6 }, yading@11: { AV_CODEC_ID_PCM_F64BE, 7 }, yading@11: { AV_CODEC_ID_ADPCM_G722,24 }, yading@11: { AV_CODEC_ID_PCM_ALAW, 27 }, yading@11: { AV_CODEC_ID_NONE, 0 }, yading@11: }; yading@11: yading@11: #if CONFIG_AU_DEMUXER yading@11: yading@11: static int au_probe(AVProbeData *p) yading@11: { yading@11: if (p->buf[0] == '.' && p->buf[1] == 's' && yading@11: p->buf[2] == 'n' && p->buf[3] == 'd') yading@11: return AVPROBE_SCORE_MAX; yading@11: else yading@11: return 0; yading@11: } yading@11: yading@11: #define BLOCK_SIZE 1024 yading@11: yading@11: static int au_read_header(AVFormatContext *s) yading@11: { yading@11: int size, data_size = 0; yading@11: unsigned int tag; yading@11: AVIOContext *pb = s->pb; yading@11: unsigned int id, channels, rate; yading@11: int bps; yading@11: enum AVCodecID codec; yading@11: AVStream *st; yading@11: yading@11: tag = avio_rl32(pb); yading@11: if (tag != MKTAG('.', 's', 'n', 'd')) yading@11: return AVERROR_INVALIDDATA; yading@11: size = avio_rb32(pb); /* header size */ yading@11: data_size = avio_rb32(pb); /* data size in bytes */ yading@11: yading@11: if (data_size < 0 && data_size != AU_UNKNOWN_SIZE) { yading@11: av_log(s, AV_LOG_ERROR, "Invalid negative data size '%d' found\n", data_size); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: id = avio_rb32(pb); yading@11: rate = avio_rb32(pb); yading@11: channels = avio_rb32(pb); yading@11: yading@11: if (size > 24) { yading@11: /* skip unused data */ yading@11: avio_skip(pb, size - 24); yading@11: } yading@11: yading@11: codec = ff_codec_get_id(codec_au_tags, id); yading@11: yading@11: if (codec == AV_CODEC_ID_NONE) { yading@11: avpriv_request_sample(s, "unknown or unsupported codec tag: %u", id); yading@11: return AVERROR_PATCHWELCOME; yading@11: } yading@11: yading@11: bps = av_get_bits_per_sample(codec); yading@11: if (!bps) { yading@11: avpriv_request_sample(s, "Unknown bits per sample"); yading@11: return AVERROR_PATCHWELCOME; yading@11: } yading@11: yading@11: if (channels == 0 || channels >= INT_MAX / (BLOCK_SIZE * bps >> 3)) { yading@11: av_log(s, AV_LOG_ERROR, "Invalid number of channels %u\n", channels); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: if (rate == 0 || rate > INT_MAX) { yading@11: av_log(s, AV_LOG_ERROR, "Invalid sample rate: %u\n", rate); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: st->codec->codec_tag = id; yading@11: st->codec->codec_id = codec; yading@11: st->codec->channels = channels; yading@11: st->codec->sample_rate = rate; yading@11: st->codec->bit_rate = channels * rate * bps; yading@11: st->codec->block_align = FFMAX(bps * st->codec->channels / 8, 1); yading@11: if (data_size != AU_UNKNOWN_SIZE) yading@11: st->duration = (((int64_t)data_size)<<3) / (st->codec->channels * (int64_t)bps); yading@11: yading@11: st->start_time = 0; yading@11: avpriv_set_pts_info(st, 64, 1, rate); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_au_demuxer = { yading@11: .name = "au", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Sun AU"), yading@11: .read_probe = au_probe, yading@11: .read_header = au_read_header, yading@11: .read_packet = ff_pcm_read_packet, yading@11: .read_seek = ff_pcm_read_seek, yading@11: .codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 }, yading@11: }; yading@11: yading@11: #endif /* CONFIG_AU_DEMUXER */ yading@11: yading@11: #if CONFIG_AU_MUXER yading@11: yading@11: #include "rawenc.h" yading@11: yading@11: static int au_write_header(AVFormatContext *s) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: AVCodecContext *enc = s->streams[0]->codec; yading@11: yading@11: if (s->nb_streams != 1) { yading@11: av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: enc->codec_tag = ff_codec_get_tag(codec_au_tags, enc->codec_id); yading@11: if (!enc->codec_tag) { yading@11: av_log(s, AV_LOG_ERROR, "unsupported codec\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: ffio_wfourcc(pb, ".snd"); /* magic number */ yading@11: avio_wb32(pb, AU_HEADER_SIZE); /* header size */ yading@11: avio_wb32(pb, AU_UNKNOWN_SIZE); /* data size */ yading@11: avio_wb32(pb, enc->codec_tag); /* codec ID */ yading@11: avio_wb32(pb, enc->sample_rate); yading@11: avio_wb32(pb, enc->channels); yading@11: avio_wb64(pb, 0); /* annotation field */ yading@11: avio_flush(pb); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int au_write_trailer(AVFormatContext *s) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: int64_t file_size = avio_tell(pb); yading@11: yading@11: if (s->pb->seekable && file_size < INT32_MAX) { yading@11: /* update file size */ yading@11: avio_seek(pb, 8, SEEK_SET); yading@11: avio_wb32(pb, (uint32_t)(file_size - AU_HEADER_SIZE)); yading@11: avio_seek(pb, file_size, SEEK_SET); yading@11: avio_flush(pb); yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: AVOutputFormat ff_au_muxer = { yading@11: .name = "au", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Sun AU"), yading@11: .mime_type = "audio/basic", yading@11: .extensions = "au", yading@11: .audio_codec = AV_CODEC_ID_PCM_S16BE, yading@11: .video_codec = AV_CODEC_ID_NONE, yading@11: .write_header = au_write_header, yading@11: .write_packet = ff_raw_write_packet, yading@11: .write_trailer = au_write_trailer, yading@11: .codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 }, yading@11: }; yading@11: yading@11: #endif /* CONFIG_AU_MUXER */