| Line | Branch | Exec | Source |
|---|---|---|---|
| 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/attributes.h" | ||
| 23 | #include "libavutil/intreadwrite.h" | ||
| 24 | #include "libavcodec/internal.h" | ||
| 25 | #include "avformat.h" | ||
| 26 | #include "demux.h" | ||
| 27 | #include "internal.h" | ||
| 28 | #include "pcm.h" | ||
| 29 | |||
| 30 | 7480 | static int epaf_probe(const AVProbeData *p) | |
| 31 | { | ||
| 32 |
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7480 | if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') && |
| 33 | ✗ | AV_RL32(p->buf + 8) == 1) || | |
| 34 |
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7480 | (AV_RL32(p->buf) == MKTAG(' ','p','a','f') && |
| 35 | ✗ | AV_RN32(p->buf + 8) == 0)) && | |
| 36 | ✗ | !AV_RN32(p->buf + 4) && AV_RN32(p->buf + 12) && | |
| 37 | ✗ | AV_RN32(p->buf + 20)) | |
| 38 | ✗ | return AVPROBE_SCORE_MAX / 4 * 3; | |
| 39 | 7480 | return 0; | |
| 40 | } | ||
| 41 | |||
| 42 | ✗ | static int epaf_read_header(AVFormatContext *s) | |
| 43 | { | ||
| 44 | int le, sample_rate, codec, channels; | ||
| 45 | AVStream *st; | ||
| 46 | |||
| 47 | ✗ | avio_skip(s->pb, 4); | |
| 48 | ✗ | if (avio_rl32(s->pb)) | |
| 49 | ✗ | return AVERROR_INVALIDDATA; | |
| 50 | |||
| 51 | ✗ | le = avio_rl32(s->pb); | |
| 52 | ✗ | if (le && le != 1) | |
| 53 | ✗ | return AVERROR_INVALIDDATA; | |
| 54 | |||
| 55 | ✗ | if (le) { | |
| 56 | ✗ | sample_rate = avio_rl32(s->pb); | |
| 57 | ✗ | codec = avio_rl32(s->pb); | |
| 58 | ✗ | channels = avio_rl32(s->pb); | |
| 59 | } else { | ||
| 60 | ✗ | sample_rate = avio_rb32(s->pb); | |
| 61 | ✗ | codec = avio_rb32(s->pb); | |
| 62 | ✗ | channels = avio_rb32(s->pb); | |
| 63 | } | ||
| 64 | |||
| 65 | ✗ | if (channels <= 0 || channels > FF_SANE_NB_CHANNELS || sample_rate <= 0) | |
| 66 | ✗ | return AVERROR_INVALIDDATA; | |
| 67 | |||
| 68 | ✗ | st = avformat_new_stream(s, NULL); | |
| 69 | ✗ | if (!st) | |
| 70 | ✗ | return AVERROR(ENOMEM); | |
| 71 | |||
| 72 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 73 | ✗ | st->codecpar->ch_layout.nb_channels = channels; | |
| 74 | ✗ | st->codecpar->sample_rate = sample_rate; | |
| 75 | ✗ | switch (codec) { | |
| 76 | ✗ | case 0: | |
| 77 | ✗ | st->codecpar->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE; | |
| 78 | ✗ | break; | |
| 79 | ✗ | case 2: | |
| 80 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_S8; | |
| 81 | ✗ | break; | |
| 82 | ✗ | case 1: | |
| 83 | ✗ | avpriv_request_sample(s, "24-bit Paris PCM format"); | |
| 84 | av_fallthrough; | ||
| 85 | ✗ | default: | |
| 86 | ✗ | return AVERROR_INVALIDDATA; | |
| 87 | } | ||
| 88 | |||
| 89 | ✗ | st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id); | |
| 90 | ✗ | st->codecpar->block_align = st->codecpar->bits_per_coded_sample * | |
| 91 | ✗ | st->codecpar->ch_layout.nb_channels / 8; | |
| 92 | |||
| 93 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 94 | |||
| 95 | ✗ | if (avio_skip(s->pb, 2024) < 0) | |
| 96 | ✗ | return AVERROR_INVALIDDATA; | |
| 97 | ✗ | return 0; | |
| 98 | } | ||
| 99 | |||
| 100 | const FFInputFormat ff_epaf_demuxer = { | ||
| 101 | .p.name = "epaf", | ||
| 102 | .p.long_name = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"), | ||
| 103 | .p.extensions = "paf,fap", | ||
| 104 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 105 | .read_probe = epaf_probe, | ||
| 106 | .read_header = epaf_read_header, | ||
| 107 | .read_packet = ff_pcm_read_packet, | ||
| 108 | .read_seek = ff_pcm_read_seek, | ||
| 109 | }; | ||
| 110 |