| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * IRCAM 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 "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "pcm.h" | ||
| 28 | #include "ircam.h" | ||
| 29 | |||
| 30 | 7186 | static int ircam_probe(const AVProbeData *p) | |
| 31 | { | ||
| 32 |
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7186 | if ((p->buf[0] == 0x64 && p->buf[1] == 0xA3 && p->buf[3] == 0x00 && |
| 33 |
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1 | p->buf[2] >= 1 && p->buf[2] <= 4) || |
| 34 |
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7185 | (p->buf[3] == 0x64 && p->buf[2] == 0xA3 && p->buf[0] == 0x00 && |
| 35 | ✗ | p->buf[1] >= 1 && p->buf[1] <= 3) && | |
| 36 | ✗ | AV_RN32(p->buf + 4) && AV_RN32(p->buf + 8)) | |
| 37 | 1 | return AVPROBE_SCORE_MAX / 4 * 3; | |
| 38 | 7185 | return 0; | |
| 39 | } | ||
| 40 | |||
| 41 | static const struct endianess { | ||
| 42 | uint32_t magic; | ||
| 43 | int is_le; | ||
| 44 | } table[] = { | ||
| 45 | { 0x64A30100, 0 }, | ||
| 46 | { 0x64A30200, 1 }, | ||
| 47 | { 0x64A30300, 0 }, | ||
| 48 | { 0x64A30400, 1 }, | ||
| 49 | { 0x0001A364, 1 }, | ||
| 50 | { 0x0002A364, 0 }, | ||
| 51 | { 0x0003A364, 1 }, | ||
| 52 | }; | ||
| 53 | |||
| 54 | 1 | static int ircam_read_header(AVFormatContext *s) | |
| 55 | { | ||
| 56 | uint32_t magic, sample_rate, channels, tag; | ||
| 57 | const AVCodecTag *tags; | ||
| 58 | 1 | int le = -1, i; | |
| 59 | AVStream *st; | ||
| 60 | |||
| 61 | 1 | magic = avio_rl32(s->pb); | |
| 62 |
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5 | for (i = 0; i < 7; i++) { |
| 63 |
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5 | if (magic == table[i].magic) { |
| 64 | 1 | le = table[i].is_le; | |
| 65 | 1 | break; | |
| 66 | } | ||
| 67 | } | ||
| 68 | |||
| 69 |
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1 | if (le == 1) { |
| 70 | 1 | sample_rate = lrintf(av_int2float(avio_rl32(s->pb))); | |
| 71 | 1 | channels = avio_rl32(s->pb); | |
| 72 | 1 | tag = avio_rl32(s->pb); | |
| 73 | 1 | tags = ff_codec_ircam_le_tags; | |
| 74 | ✗ | } else if (le == 0) { | |
| 75 | ✗ | sample_rate = lrintf(av_int2float(avio_rb32(s->pb))); | |
| 76 | ✗ | channels = avio_rb32(s->pb); | |
| 77 | ✗ | tag = avio_rb32(s->pb); | |
| 78 | ✗ | tags = ff_codec_ircam_be_tags; | |
| 79 | } else { | ||
| 80 | ✗ | return AVERROR_INVALIDDATA; | |
| 81 | } | ||
| 82 | |||
| 83 |
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1 | if (!channels || !sample_rate) |
| 84 | ✗ | return AVERROR_INVALIDDATA; | |
| 85 | |||
| 86 | 1 | st = avformat_new_stream(s, NULL); | |
| 87 |
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1 | if (!st) |
| 88 | ✗ | return AVERROR(ENOMEM); | |
| 89 | |||
| 90 | 1 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 91 | 1 | st->codecpar->ch_layout.nb_channels = channels; | |
| 92 |
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1 | if (st->codecpar->ch_layout.nb_channels > FF_SANE_NB_CHANNELS) |
| 93 | ✗ | return AVERROR(ENOSYS); | |
| 94 | 1 | st->codecpar->sample_rate = sample_rate; | |
| 95 | |||
| 96 | 1 | st->codecpar->codec_id = ff_codec_get_id(tags, tag); | |
| 97 |
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1 | if (st->codecpar->codec_id == AV_CODEC_ID_NONE) { |
| 98 | ✗ | av_log(s, AV_LOG_ERROR, "unknown tag %"PRIx32"\n", tag); | |
| 99 | ✗ | return AVERROR_INVALIDDATA; | |
| 100 | } | ||
| 101 | |||
| 102 | 1 | st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id); | |
| 103 | 1 | st->codecpar->block_align = st->codecpar->bits_per_coded_sample * | |
| 104 | 1 | st->codecpar->ch_layout.nb_channels / 8; | |
| 105 | 1 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 106 | 1 | avio_skip(s->pb, 1008); | |
| 107 | |||
| 108 | 1 | return 0; | |
| 109 | } | ||
| 110 | |||
| 111 | const FFInputFormat ff_ircam_demuxer = { | ||
| 112 | .p.name = "ircam", | ||
| 113 | .p.long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"), | ||
| 114 | .p.extensions = "sf,ircam", | ||
| 115 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 116 | .read_probe = ircam_probe, | ||
| 117 | .read_header = ircam_read_header, | ||
| 118 | .read_packet = ff_pcm_read_packet, | ||
| 119 | .read_seek = ff_pcm_read_seek, | ||
| 120 | }; | ||
| 121 |