repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Ensoniq Paris Audio File demuxer | |
| 3 | * Copyright (c) 2012 Paul B Mahol | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include "libavutil/intreadwrite.h" | |
| 23 | #include "avformat.h" | |
| 24 | #include "internal.h" | |
| 25 | #include "pcm.h" | |
| 26 | ||
| 27 | static int epaf_probe(AVProbeData *p) | |
| 28 | { | |
| 29 | if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') && | |
| 30 | AV_RL32(p->buf + 8) == 1) || | |
| 31 | (AV_RL32(p->buf) == MKTAG(' ','p','a','f') && | |
| 32 | AV_RN32(p->buf + 8) == 0)) && | |
| 33 | !AV_RN32(p->buf + 4) && AV_RN32(p->buf + 12) && | |
| 34 | AV_RN32(p->buf + 20)) | |
| 35 | return AVPROBE_SCORE_MAX / 4 * 3; | |
| 36 | return 0; | |
| 37 | } | |
| 38 | ||
| 39 | static int epaf_read_header(AVFormatContext *s) | |
| 40 | { | |
| 41 | int le, sample_rate, codec, channels; | |
| 42 | AVStream *st; | |
| 43 | ||
| 44 | avio_skip(s->pb, 4); | |
| 45 | if (avio_rl32(s->pb)) | |
| 46 | return AVERROR_INVALIDDATA; | |
| 47 | ||
| 48 | le = avio_rl32(s->pb); | |
| 49 | if (le && le != 1) | |
| 50 | return AVERROR_INVALIDDATA; | |
| 51 | ||
| 52 | if (le) { | |
| 53 | sample_rate = avio_rl32(s->pb); | |
| 54 | codec = avio_rl32(s->pb); | |
| 55 | channels = avio_rl32(s->pb); | |
| 56 | } else { | |
| 57 | sample_rate = avio_rb32(s->pb); | |
| 58 | codec = avio_rb32(s->pb); | |
| 59 | channels = avio_rb32(s->pb); | |
| 60 | } | |
| 61 | ||
| 62 | if (!channels || !sample_rate) | |
| 63 | return AVERROR_INVALIDDATA; | |
| 64 | ||
| 65 | st = avformat_new_stream(s, NULL); | |
| 66 | if (!st) | |
| 67 | return AVERROR(ENOMEM); | |
| 68 | ||
| 69 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 70 | st->codec->channels = channels; | |
| 71 | st->codec->sample_rate = sample_rate; | |
| 72 | switch (codec) { | |
| 73 | case 0: | |
| 74 | st->codec->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE; | |
| 75 | break; | |
| 76 | case 2: | |
| 77 | st->codec->codec_id = AV_CODEC_ID_PCM_S8; | |
| 78 | break; | |
| 79 | case 1: | |
| 80 | avpriv_request_sample(s, "24-bit Paris PCM format"); | |
| 81 | default: | |
| 82 | return AVERROR_INVALIDDATA; | |
| 83 | } | |
| 84 | ||
| 85 | st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id); | |
| 86 | st->codec->block_align = st->codec->bits_per_coded_sample * st->codec->channels / 8; | |
| 87 | ||
| 88 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); | |
| 89 | ||
| 90 | if (avio_skip(s->pb, 2024) < 0) | |
| 91 | return AVERROR_INVALIDDATA; | |
| 92 | return 0; | |
| 93 | } | |
| 94 | ||
| 95 | AVInputFormat ff_epaf_demuxer = { | |
| 96 | .name = "epaf", | |
| 97 | .long_name = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"), | |
| 98 | .read_probe = epaf_probe, | |
| 99 | .read_header = epaf_read_header, | |
| 100 | .read_packet = ff_pcm_read_packet, | |
| 101 | .read_seek = ff_pcm_read_seek, | |
| 102 | .extensions = "paf,fap", | |
| 103 | .flags = AVFMT_GENERIC_INDEX, | |
| 104 | }; |