| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SDX demuxer | ||
| 3 | * Copyright (c) 2017 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/avstring.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 sdx_probe(const AVProbeData *p) | |
| 30 | { | ||
| 31 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 7186 times.
|
7186 | if (AV_RB32(p->buf) == AV_RB32("SDX:")) |
| 32 | ✗ | return AVPROBE_SCORE_EXTENSION; | |
| 33 | 7186 | return 0; | |
| 34 | } | ||
| 35 | |||
| 36 | ✗ | static int sdx_read_header(AVFormatContext *s) | |
| 37 | { | ||
| 38 | AVStream *st; | ||
| 39 | int depth, length; | ||
| 40 | |||
| 41 | ✗ | avio_skip(s->pb, 4); | |
| 42 | ✗ | while (!avio_feof(s->pb)) { | |
| 43 | ✗ | if (avio_r8(s->pb) == 0x1a) | |
| 44 | ✗ | break; | |
| 45 | } | ||
| 46 | ✗ | if (avio_r8(s->pb) != 1) | |
| 47 | ✗ | return AVERROR_INVALIDDATA; | |
| 48 | ✗ | length = avio_r8(s->pb); | |
| 49 | ✗ | avio_skip(s->pb, length); | |
| 50 | ✗ | avio_skip(s->pb, 4); | |
| 51 | ✗ | depth = avio_r8(s->pb); | |
| 52 | |||
| 53 | ✗ | st = avformat_new_stream(s, NULL); | |
| 54 | ✗ | if (!st) | |
| 55 | ✗ | return AVERROR(ENOMEM); | |
| 56 | |||
| 57 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 58 | ✗ | st->codecpar->ch_layout.nb_channels = 1; | |
| 59 | ✗ | st->codecpar->sample_rate = avio_rl32(s->pb); | |
| 60 | ✗ | switch (depth) { | |
| 61 | ✗ | case 8: | |
| 62 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_U8; | |
| 63 | ✗ | break; | |
| 64 | ✗ | case 16: | |
| 65 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_U16LE; | |
| 66 | ✗ | break; | |
| 67 | ✗ | case 24: | |
| 68 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_U24LE; | |
| 69 | ✗ | break; | |
| 70 | ✗ | case 32: | |
| 71 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_PCM_U32LE; | |
| 72 | ✗ | break; | |
| 73 | ✗ | default: | |
| 74 | ✗ | return AVERROR_INVALIDDATA; | |
| 75 | } | ||
| 76 | ✗ | avio_skip(s->pb, 16); | |
| 77 | ✗ | st->codecpar->block_align = depth / 8; | |
| 78 | |||
| 79 | ✗ | return 0; | |
| 80 | } | ||
| 81 | |||
| 82 | const FFInputFormat ff_sdx_demuxer = { | ||
| 83 | .p.name = "sdx", | ||
| 84 | .p.long_name = NULL_IF_CONFIG_SMALL("Sample Dump eXchange"), | ||
| 85 | .p.extensions = "sdx", | ||
| 86 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 87 | .read_probe = sdx_probe, | ||
| 88 | .read_header = sdx_read_header, | ||
| 89 | .read_packet = ff_pcm_read_packet, | ||
| 90 | .read_seek = ff_pcm_read_seek, | ||
| 91 | }; | ||
| 92 |