| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Wideband Single-bit Data (WSD) demuxer | ||
| 3 | * Copyright (c) 2014 Peter Ross | ||
| 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 "libavutil/mem.h" | ||
| 25 | #include "libavutil/timecode.h" | ||
| 26 | #include "avformat.h" | ||
| 27 | #include "avio_internal.h" | ||
| 28 | #include "demux.h" | ||
| 29 | #include "rawdec.h" | ||
| 30 | |||
| 31 | 7474 | static int wsd_probe(const AVProbeData *p) | |
| 32 | { | ||
| 33 |
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7474 | if (p->buf_size < 45 || memcmp(p->buf, "1bit", 4) || |
| 34 | ✗ | !AV_RB32(p->buf + 36) || !p->buf[44] || | |
| 35 | ✗ | (p->buf[0] >= 0x10 && (AV_RB32(p->buf + 20) < 0x80 || AV_RB32(p->buf + 24) < 0x80))) | |
| 36 | 7474 | return 0; | |
| 37 | ✗ | return AVPROBE_SCORE_MAX; | |
| 38 | } | ||
| 39 | |||
| 40 | ✗ | static int empty_string(const char *buf, unsigned size) | |
| 41 | { | ||
| 42 | ✗ | while (size--) { | |
| 43 | ✗ | if (*buf++ != ' ') | |
| 44 | ✗ | return 0; | |
| 45 | } | ||
| 46 | ✗ | return 1; | |
| 47 | } | ||
| 48 | |||
| 49 | ✗ | static int wsd_to_av_channel_layoyt(AVFormatContext *s, int bit) | |
| 50 | { | ||
| 51 | ✗ | switch (bit) { | |
| 52 | ✗ | case 2: return AV_CH_BACK_RIGHT; | |
| 53 | ✗ | case 3: | |
| 54 | ✗ | avpriv_request_sample(s, "Rr-middle"); | |
| 55 | ✗ | break; | |
| 56 | ✗ | case 4: return AV_CH_BACK_CENTER; | |
| 57 | ✗ | case 5: | |
| 58 | ✗ | avpriv_request_sample(s, "Lr-middle"); | |
| 59 | ✗ | break; | |
| 60 | ✗ | case 6: return AV_CH_BACK_LEFT; | |
| 61 | ✗ | case 24: return AV_CH_LOW_FREQUENCY; | |
| 62 | ✗ | case 26: return AV_CH_FRONT_RIGHT; | |
| 63 | ✗ | case 27: return AV_CH_FRONT_RIGHT_OF_CENTER; | |
| 64 | ✗ | case 28: return AV_CH_FRONT_CENTER; | |
| 65 | ✗ | case 29: return AV_CH_FRONT_LEFT_OF_CENTER; | |
| 66 | ✗ | case 30: return AV_CH_FRONT_LEFT; | |
| 67 | ✗ | default: | |
| 68 | ✗ | av_log(s, AV_LOG_WARNING, "reserved channel assignment\n"); | |
| 69 | ✗ | break; | |
| 70 | } | ||
| 71 | ✗ | return 0; | |
| 72 | } | ||
| 73 | |||
| 74 | ✗ | static int get_metadata(AVFormatContext *s, const char *const tag, const unsigned size) | |
| 75 | { | ||
| 76 | uint8_t *buf; | ||
| 77 | int ret; | ||
| 78 | ✗ | if (!(size + 1)) | |
| 79 | ✗ | return AVERROR(ENOMEM); | |
| 80 | |||
| 81 | ✗ | buf = av_malloc(size + 1); | |
| 82 | ✗ | if (!buf) | |
| 83 | ✗ | return AVERROR(ENOMEM); | |
| 84 | |||
| 85 | ✗ | if ((ret = ffio_read_size(s->pb, buf, size)) < 0) { | |
| 86 | ✗ | av_free(buf); | |
| 87 | ✗ | return ret; | |
| 88 | } | ||
| 89 | |||
| 90 | ✗ | if (empty_string(buf, size)) { | |
| 91 | ✗ | av_free(buf); | |
| 92 | ✗ | return 0; | |
| 93 | } | ||
| 94 | |||
| 95 | ✗ | buf[size] = 0; | |
| 96 | ✗ | av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL); | |
| 97 | ✗ | return 0; | |
| 98 | } | ||
| 99 | |||
| 100 | ✗ | static int wsd_read_header(AVFormatContext *s) | |
| 101 | { | ||
| 102 | ✗ | AVIOContext *pb = s->pb; | |
| 103 | AVStream *st; | ||
| 104 | int version; | ||
| 105 | uint32_t text_offset, data_offset, channel_assign; | ||
| 106 | char playback_time[AV_TIMECODE_STR_SIZE]; | ||
| 107 | |||
| 108 | ✗ | st = avformat_new_stream(s, NULL); | |
| 109 | ✗ | if (!st) | |
| 110 | ✗ | return AVERROR(ENOMEM); | |
| 111 | |||
| 112 | ✗ | avio_skip(pb, 8); | |
| 113 | ✗ | version = avio_r8(pb); | |
| 114 | ✗ | av_log(s, AV_LOG_DEBUG, "version: %i.%i\n", version >> 4, version & 0xF); | |
| 115 | ✗ | avio_skip(pb, 11); | |
| 116 | |||
| 117 | ✗ | if (version < 0x10) { | |
| 118 | ✗ | text_offset = 0x80; | |
| 119 | ✗ | data_offset = 0x800; | |
| 120 | ✗ | avio_skip(pb, 8); | |
| 121 | } else { | ||
| 122 | ✗ | text_offset = avio_rb32(pb); | |
| 123 | ✗ | data_offset = avio_rb32(pb); | |
| 124 | } | ||
| 125 | |||
| 126 | ✗ | avio_skip(pb, 4); | |
| 127 | ✗ | av_timecode_make_smpte_tc_string2(playback_time, (AVRational){1,1}, avio_rb32(pb) & 0x00ffffffU, 1, 1); | |
| 128 | ✗ | av_dict_set(&s->metadata, "playback_time", playback_time, 0); | |
| 129 | |||
| 130 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 131 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_DSD_MSBF; | |
| 132 | ✗ | st->codecpar->sample_rate = avio_rb32(pb) / 8; | |
| 133 | ✗ | avio_skip(pb, 4); | |
| 134 | ✗ | st->codecpar->ch_layout.nb_channels = avio_r8(pb) & 0xF; | |
| 135 | ✗ | st->codecpar->bit_rate = (int64_t)st->codecpar->ch_layout.nb_channels * | |
| 136 | ✗ | st->codecpar->sample_rate * 8LL; | |
| 137 | ✗ | if (!st->codecpar->ch_layout.nb_channels) | |
| 138 | ✗ | return AVERROR_INVALIDDATA; | |
| 139 | |||
| 140 | ✗ | avio_skip(pb, 3); | |
| 141 | ✗ | channel_assign = avio_rb32(pb); | |
| 142 | ✗ | if (!(channel_assign & 1)) { | |
| 143 | ✗ | uint64_t ch_mask = 0; | |
| 144 | int i; | ||
| 145 | ✗ | for (i = 1; i < 32; i++) | |
| 146 | ✗ | if ((channel_assign >> i) & 1) | |
| 147 | ✗ | ch_mask |= wsd_to_av_channel_layoyt(s, i); | |
| 148 | ✗ | av_channel_layout_from_mask(&st->codecpar->ch_layout, ch_mask); | |
| 149 | } | ||
| 150 | |||
| 151 | ✗ | avio_skip(pb, 16); | |
| 152 | ✗ | if (avio_rb32(pb)) | |
| 153 | ✗ | avpriv_request_sample(s, "emphasis"); | |
| 154 | |||
| 155 | ✗ | if (avio_seek(pb, text_offset, SEEK_SET) >= 0) { | |
| 156 | ✗ | get_metadata(s, "title", 128); | |
| 157 | ✗ | get_metadata(s, "composer", 128); | |
| 158 | ✗ | get_metadata(s, "song_writer", 128); | |
| 159 | ✗ | get_metadata(s, "artist", 128); | |
| 160 | ✗ | get_metadata(s, "album", 128); | |
| 161 | ✗ | get_metadata(s, "genre", 32); | |
| 162 | ✗ | get_metadata(s, "date", 32); | |
| 163 | ✗ | get_metadata(s, "location", 32); | |
| 164 | ✗ | get_metadata(s, "comment", 512); | |
| 165 | ✗ | get_metadata(s, "user", 512); | |
| 166 | } | ||
| 167 | |||
| 168 | ✗ | return avio_seek(pb, data_offset, SEEK_SET); | |
| 169 | } | ||
| 170 | |||
| 171 | const FFInputFormat ff_wsd_demuxer = { | ||
| 172 | .p.name = "wsd", | ||
| 173 | .p.long_name = NULL_IF_CONFIG_SMALL("Wideband Single-bit Data (WSD)"), | ||
| 174 | .p.extensions = "wsd", | ||
| 175 | .p.flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK, | ||
| 176 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 177 | .read_probe = wsd_probe, | ||
| 178 | .read_header = wsd_read_header, | ||
| 179 | .read_packet = ff_raw_read_partial_packet, | ||
| 180 | .raw_codec_id = AV_CODEC_ID_DSD_MSBF, | ||
| 181 | .priv_data_size = sizeof(FFRawDemuxerContext), | ||
| 182 | }; | ||
| 183 |