diff options
Diffstat (limited to 'libavformat/msf.c')
| -rw-r--r-- | libavformat/msf.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/libavformat/msf.c b/libavformat/msf.c new file mode 100644 index 0000000000..6bd18f29bd --- /dev/null +++ b/libavformat/msf.c @@ -0,0 +1,110 @@ +/* + * MSF demuxer + * Copyright (c) 2015 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/intreadwrite.h" +#include "avformat.h" +#include "internal.h" + +static int msf_probe(AVProbeData *p) +{ + if (memcmp(p->buf, "MSF", 3)) + return 0; + + if (AV_RB32(p->buf+8) <= 0) + return 0; + + if (AV_RB32(p->buf+16) <= 0) + return 0; + + if (AV_RB32(p->buf+4) > 16) + return AVPROBE_SCORE_MAX / 5; //unsupported / unknown codec + + return AVPROBE_SCORE_MAX / 3 * 2; +} + +static int msf_read_header(AVFormatContext *s) +{ + unsigned codec, size; + AVStream *st; + int ret; + + avio_skip(s->pb, 4); + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; + codec = avio_rb32(s->pb); + st->codecpar->channels = avio_rb32(s->pb); + if (st->codecpar->channels <= 0 || st->codecpar->channels >= INT_MAX / 1024) + return AVERROR_INVALIDDATA; + size = avio_rb32(s->pb); + st->codecpar->sample_rate = avio_rb32(s->pb); + if (st->codecpar->sample_rate <= 0) + return AVERROR_INVALIDDATA; + // avio_rb32(s->pb); /* byte flags with encoder info */ + switch (codec) { + case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break; + case 1: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break; + case 3: st->codecpar->block_align = 16 * st->codecpar->channels; + st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break; + case 4: + case 5: + case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->channels; + ret = ff_alloc_extradata(st->codecpar, 14); + if (ret < 0) + return ret; + memset(st->codecpar->extradata, 0, st->codecpar->extradata_size); + AV_WL16(st->codecpar->extradata, 1); /* version */ + AV_WL16(st->codecpar->extradata+2, 2048 * st->codecpar->channels); /* unknown size */ + AV_WL16(st->codecpar->extradata+6, codec == 4 ? 1 : 0); /* joint stereo */ + AV_WL16(st->codecpar->extradata+8, codec == 4 ? 1 : 0); /* joint stereo (repeat?) */ + AV_WL16(st->codecpar->extradata+10, 1); + st->codecpar->codec_id = AV_CODEC_ID_ATRAC3; break; + case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW; + st->codecpar->codec_id = AV_CODEC_ID_MP3; break; + default: + avpriv_request_sample(s, "Codec %d", codec); + return AVERROR_PATCHWELCOME; + } + st->duration = av_get_audio_frame_duration2(st->codecpar, size); + avio_skip(s->pb, 0x40 - avio_tell(s->pb)); + avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); + + return 0; +} + +static int msf_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + AVCodecParameters *par = s->streams[0]->codecpar; + + return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels); +} + +AVInputFormat ff_msf_demuxer = { + .name = "msf", + .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"), + .read_probe = msf_probe, + .read_header = msf_read_header, + .read_packet = msf_read_packet, + .extensions = "msf", +}; |