blob: 89c00016cdc2a3e178d65a28047eea6362c64f43
| 1 | /* |
| 2 | * Copyright (c) 2015 Paul B Mahol |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "avformat.h" |
| 22 | #include "internal.h" |
| 23 | #include "pcm.h" |
| 24 | |
| 25 | static int wve_probe(AVProbeData *p) |
| 26 | { |
| 27 | if (memcmp(p->buf, "ALawSoundFile**\0\017\020", 18) || |
| 28 | memcmp(p->buf + 22, "\0\0\0\1\0\0\0\0\0\0", 10)) |
| 29 | return 0; |
| 30 | return AVPROBE_SCORE_MAX; |
| 31 | } |
| 32 | |
| 33 | static int wve_read_header(AVFormatContext *s) |
| 34 | { |
| 35 | AVStream *st; |
| 36 | |
| 37 | st = avformat_new_stream(s, NULL); |
| 38 | if (!st) |
| 39 | return AVERROR(ENOMEM); |
| 40 | |
| 41 | avio_skip(s->pb, 18); |
| 42 | st->duration = avio_rb32(s->pb); |
| 43 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 44 | st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; |
| 45 | st->codecpar->sample_rate = 8000; |
| 46 | st->codecpar->channels = 1; |
| 47 | st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id); |
| 48 | st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8; |
| 49 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 50 | avio_skip(s->pb, 10); |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | AVInputFormat ff_wve_demuxer = { |
| 56 | .name = "wve", |
| 57 | .long_name = NULL_IF_CONFIG_SMALL("Psion 3 audio"), |
| 58 | .read_probe = wve_probe, |
| 59 | .read_header = wve_read_header, |
| 60 | .read_packet = ff_pcm_read_packet, |
| 61 | .read_seek = ff_pcm_read_seek, |
| 62 | }; |
| 63 |