| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * DERF demuxer | ||
| 3 | * Copyright (c) 2020 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/channel_layout.h" | ||
| 23 | #include "libavutil/intreadwrite.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "pcm.h" | ||
| 28 | |||
| 29 | 7186 | static int derf_probe(const AVProbeData *p) | |
| 30 | { | ||
| 31 |
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7186 | if (AV_RL32(p->buf) != MKTAG('D','E','R','F')) |
| 32 | 7186 | return 0; | |
| 33 | ✗ | if (AV_RL32(p->buf+4) != 1 && AV_RL32(p->buf+4) != 2) | |
| 34 | ✗ | return 0; | |
| 35 | |||
| 36 | ✗ | return AVPROBE_SCORE_MAX / 3 * 2; | |
| 37 | } | ||
| 38 | |||
| 39 | ✗ | static int derf_read_header(AVFormatContext *s) | |
| 40 | { | ||
| 41 | unsigned data_size; | ||
| 42 | int channels; | ||
| 43 | ✗ | AVIOContext *pb = s->pb; | |
| 44 | AVCodecParameters *par; | ||
| 45 | AVStream *st; | ||
| 46 | |||
| 47 | ✗ | avio_skip(pb, 4); | |
| 48 | |||
| 49 | ✗ | st = avformat_new_stream(s, NULL); | |
| 50 | ✗ | if (!st) | |
| 51 | ✗ | return AVERROR(ENOMEM); | |
| 52 | |||
| 53 | ✗ | par = st->codecpar; | |
| 54 | ✗ | par->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 55 | ✗ | par->codec_id = AV_CODEC_ID_DERF_DPCM; | |
| 56 | ✗ | par->format = AV_SAMPLE_FMT_S16; | |
| 57 | ✗ | channels = avio_rl32(pb); | |
| 58 | ✗ | if (channels != 1 && channels != 2) | |
| 59 | ✗ | return AVERROR_INVALIDDATA; | |
| 60 | ✗ | av_channel_layout_default(&par->ch_layout, channels); | |
| 61 | ✗ | data_size = avio_rl32(pb); | |
| 62 | ✗ | st->duration = data_size / channels; | |
| 63 | ✗ | par->sample_rate = 22050; | |
| 64 | ✗ | par->block_align = 1; | |
| 65 | |||
| 66 | ✗ | avpriv_set_pts_info(st, 64, 1, par->sample_rate); | |
| 67 | |||
| 68 | ✗ | return 0; | |
| 69 | } | ||
| 70 | |||
| 71 | const FFInputFormat ff_derf_demuxer = { | ||
| 72 | .p.name = "derf", | ||
| 73 | .p.long_name = NULL_IF_CONFIG_SMALL("Xilam DERF"), | ||
| 74 | .p.extensions = "adp", | ||
| 75 | .read_probe = derf_probe, | ||
| 76 | .read_header = derf_read_header, | ||
| 77 | .read_packet = ff_pcm_read_packet, | ||
| 78 | .read_seek = ff_pcm_read_seek, | ||
| 79 | }; | ||
| 80 |