blob: 0cd9627a4b220b8baa3369574b945183032e3190
| 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 "libavcodec/internal.h" |
| 24 | #include "avformat.h" |
| 25 | #include "internal.h" |
| 26 | #include "pcm.h" |
| 27 | |
| 28 | static int epaf_probe(AVProbeData *p) |
| 29 | { |
| 30 | if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') && |
| 31 | AV_RL32(p->buf + 8) == 1) || |
| 32 | (AV_RL32(p->buf) == MKTAG(' ','p','a','f') && |
| 33 | AV_RN32(p->buf + 8) == 0)) && |
| 34 | !AV_RN32(p->buf + 4) && AV_RN32(p->buf + 12) && |
| 35 | AV_RN32(p->buf + 20)) |
| 36 | return AVPROBE_SCORE_MAX / 4 * 3; |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | static int epaf_read_header(AVFormatContext *s) |
| 41 | { |
| 42 | int le, sample_rate, codec, channels; |
| 43 | AVStream *st; |
| 44 | |
| 45 | avio_skip(s->pb, 4); |
| 46 | if (avio_rl32(s->pb)) |
| 47 | return AVERROR_INVALIDDATA; |
| 48 | |
| 49 | le = avio_rl32(s->pb); |
| 50 | if (le && le != 1) |
| 51 | return AVERROR_INVALIDDATA; |
| 52 | |
| 53 | if (le) { |
| 54 | sample_rate = avio_rl32(s->pb); |
| 55 | codec = avio_rl32(s->pb); |
| 56 | channels = avio_rl32(s->pb); |
| 57 | } else { |
| 58 | sample_rate = avio_rb32(s->pb); |
| 59 | codec = avio_rb32(s->pb); |
| 60 | channels = avio_rb32(s->pb); |
| 61 | } |
| 62 | |
| 63 | if (channels <= 0 || channels > FF_SANE_NB_CHANNELS || sample_rate <= 0) |
| 64 | return AVERROR_INVALIDDATA; |
| 65 | |
| 66 | st = avformat_new_stream(s, NULL); |
| 67 | if (!st) |
| 68 | return AVERROR(ENOMEM); |
| 69 | |
| 70 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 71 | st->codecpar->channels = channels; |
| 72 | st->codecpar->sample_rate = sample_rate; |
| 73 | switch (codec) { |
| 74 | case 0: |
| 75 | st->codecpar->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE; |
| 76 | break; |
| 77 | case 2: |
| 78 | st->codecpar->codec_id = AV_CODEC_ID_PCM_S8; |
| 79 | break; |
| 80 | case 1: |
| 81 | avpriv_request_sample(s, "24-bit Paris PCM format"); |
| 82 | default: |
| 83 | return AVERROR_INVALIDDATA; |
| 84 | } |
| 85 | |
| 86 | st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id); |
| 87 | st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8; |
| 88 | |
| 89 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 90 | |
| 91 | if (avio_skip(s->pb, 2024) < 0) |
| 92 | return AVERROR_INVALIDDATA; |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | AVInputFormat ff_epaf_demuxer = { |
| 97 | .name = "epaf", |
| 98 | .long_name = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"), |
| 99 | .read_probe = epaf_probe, |
| 100 | .read_header = epaf_read_header, |
| 101 | .read_packet = ff_pcm_read_packet, |
| 102 | .read_seek = ff_pcm_read_seek, |
| 103 | .extensions = "paf,fap", |
| 104 | .flags = AVFMT_GENERIC_INDEX, |
| 105 | }; |
| 106 |