Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * AU muxer and demuxer | |
3 | * Copyright (c) 2001 Fabrice Bellard | |
4 | * | |
5 | * first version by Francois Revol <revol@free.fr> | |
6 | * | |
7 | * This file is part of FFmpeg. | |
8 | * | |
9 | * FFmpeg is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * FFmpeg is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with FFmpeg; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Reference documents: | |
26 | * http://www.opengroup.org/public/pubs/external/auformat.html | |
27 | * http://www.goice.co.jp/member/mo/formats/au.html | |
28 | */ | |
29 | ||
30 | #include "avformat.h" | |
31 | #include "internal.h" | |
32 | #include "avio_internal.h" | |
33 | #include "pcm.h" | |
34 | #include "libavutil/avassert.h" | |
35 | ||
36 | /* if we don't know the size in advance */ | |
37 | #define AU_UNKNOWN_SIZE ((uint32_t)(~0)) | |
38 | /* the specification requires an annotation field of at least eight bytes */ | |
39 | #define AU_HEADER_SIZE (24+8) | |
40 | ||
41 | static const AVCodecTag codec_au_tags[] = { | |
42 | { AV_CODEC_ID_PCM_MULAW, 1 }, | |
43 | { AV_CODEC_ID_PCM_S8, 2 }, | |
44 | { AV_CODEC_ID_PCM_S16BE, 3 }, | |
45 | { AV_CODEC_ID_PCM_S24BE, 4 }, | |
46 | { AV_CODEC_ID_PCM_S32BE, 5 }, | |
47 | { AV_CODEC_ID_PCM_F32BE, 6 }, | |
48 | { AV_CODEC_ID_PCM_F64BE, 7 }, | |
49 | { AV_CODEC_ID_ADPCM_G726LE, 23 }, | |
50 | { AV_CODEC_ID_ADPCM_G722,24 }, | |
51 | { AV_CODEC_ID_ADPCM_G726LE, 25 }, | |
52 | { AV_CODEC_ID_ADPCM_G726LE, 26 }, | |
53 | { AV_CODEC_ID_PCM_ALAW, 27 }, | |
54 | { AV_CODEC_ID_ADPCM_G726LE, MKBETAG('7','2','6','2') }, | |
55 | { AV_CODEC_ID_NONE, 0 }, | |
56 | }; | |
57 | ||
58 | #if CONFIG_AU_DEMUXER | |
59 | ||
60 | static int au_probe(AVProbeData *p) | |
61 | { | |
62 | if (p->buf[0] == '.' && p->buf[1] == 's' && | |
63 | p->buf[2] == 'n' && p->buf[3] == 'd') | |
64 | return AVPROBE_SCORE_MAX; | |
65 | else | |
66 | return 0; | |
67 | } | |
68 | ||
69 | #define BLOCK_SIZE 1024 | |
70 | ||
71 | static int au_read_header(AVFormatContext *s) | |
72 | { | |
73 | int size, data_size = 0; | |
74 | unsigned int tag; | |
75 | AVIOContext *pb = s->pb; | |
76 | unsigned int id, channels, rate; | |
77 | int bps; | |
78 | enum AVCodecID codec; | |
79 | AVStream *st; | |
80 | ||
81 | tag = avio_rl32(pb); | |
82 | if (tag != MKTAG('.', 's', 'n', 'd')) | |
83 | return AVERROR_INVALIDDATA; | |
84 | size = avio_rb32(pb); /* header size */ | |
85 | data_size = avio_rb32(pb); /* data size in bytes */ | |
86 | ||
87 | if (data_size < 0 && data_size != AU_UNKNOWN_SIZE) { | |
88 | av_log(s, AV_LOG_ERROR, "Invalid negative data size '%d' found\n", data_size); | |
89 | return AVERROR_INVALIDDATA; | |
90 | } | |
91 | ||
92 | id = avio_rb32(pb); | |
93 | rate = avio_rb32(pb); | |
94 | channels = avio_rb32(pb); | |
95 | ||
96 | if (size > 24) { | |
97 | /* skip unused data */ | |
98 | avio_skip(pb, size - 24); | |
99 | } | |
100 | ||
101 | codec = ff_codec_get_id(codec_au_tags, id); | |
102 | ||
103 | if (codec == AV_CODEC_ID_NONE) { | |
104 | avpriv_request_sample(s, "unknown or unsupported codec tag: %u", id); | |
105 | return AVERROR_PATCHWELCOME; | |
106 | } | |
107 | ||
108 | bps = av_get_bits_per_sample(codec); | |
109 | if (codec == AV_CODEC_ID_ADPCM_G726LE) { | |
110 | if (id == MKBETAG('7','2','6','2')) { | |
111 | bps = 2; | |
112 | } else { | |
113 | const uint8_t bpcss[] = {4, 0, 3, 5}; | |
114 | av_assert0(id >= 23 && id < 23 + 4); | |
115 | bps = bpcss[id - 23]; | |
116 | } | |
117 | } else if (!bps) { | |
118 | avpriv_request_sample(s, "Unknown bits per sample"); | |
119 | return AVERROR_PATCHWELCOME; | |
120 | } | |
121 | ||
122 | if (channels == 0 || channels >= INT_MAX / (BLOCK_SIZE * bps >> 3)) { | |
123 | av_log(s, AV_LOG_ERROR, "Invalid number of channels %u\n", channels); | |
124 | return AVERROR_INVALIDDATA; | |
125 | } | |
126 | ||
127 | if (rate == 0 || rate > INT_MAX) { | |
128 | av_log(s, AV_LOG_ERROR, "Invalid sample rate: %u\n", rate); | |
129 | return AVERROR_INVALIDDATA; | |
130 | } | |
131 | ||
132 | st = avformat_new_stream(s, NULL); | |
133 | if (!st) | |
134 | return AVERROR(ENOMEM); | |
135 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
136 | st->codec->codec_tag = id; | |
137 | st->codec->codec_id = codec; | |
138 | st->codec->channels = channels; | |
139 | st->codec->sample_rate = rate; | |
140 | st->codec->bits_per_coded_sample = bps; | |
141 | st->codec->bit_rate = channels * rate * bps; | |
142 | st->codec->block_align = FFMAX(bps * st->codec->channels / 8, 1); | |
143 | if (data_size != AU_UNKNOWN_SIZE) | |
144 | st->duration = (((int64_t)data_size)<<3) / (st->codec->channels * (int64_t)bps); | |
145 | ||
146 | st->start_time = 0; | |
147 | avpriv_set_pts_info(st, 64, 1, rate); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | AVInputFormat ff_au_demuxer = { | |
153 | .name = "au", | |
154 | .long_name = NULL_IF_CONFIG_SMALL("Sun AU"), | |
155 | .read_probe = au_probe, | |
156 | .read_header = au_read_header, | |
157 | .read_packet = ff_pcm_read_packet, | |
158 | .read_seek = ff_pcm_read_seek, | |
159 | .codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 }, | |
160 | }; | |
161 | ||
162 | #endif /* CONFIG_AU_DEMUXER */ | |
163 | ||
164 | #if CONFIG_AU_MUXER | |
165 | ||
166 | #include "rawenc.h" | |
167 | ||
168 | static int au_write_header(AVFormatContext *s) | |
169 | { | |
170 | AVIOContext *pb = s->pb; | |
171 | AVCodecContext *enc = s->streams[0]->codec; | |
172 | ||
173 | if (s->nb_streams != 1) { | |
174 | av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); | |
175 | return AVERROR(EINVAL); | |
176 | } | |
177 | ||
178 | enc->codec_tag = ff_codec_get_tag(codec_au_tags, enc->codec_id); | |
179 | if (!enc->codec_tag) { | |
180 | av_log(s, AV_LOG_ERROR, "unsupported codec\n"); | |
181 | return AVERROR(EINVAL); | |
182 | } | |
183 | ||
184 | ffio_wfourcc(pb, ".snd"); /* magic number */ | |
185 | avio_wb32(pb, AU_HEADER_SIZE); /* header size */ | |
186 | avio_wb32(pb, AU_UNKNOWN_SIZE); /* data size */ | |
187 | avio_wb32(pb, enc->codec_tag); /* codec ID */ | |
188 | avio_wb32(pb, enc->sample_rate); | |
189 | avio_wb32(pb, enc->channels); | |
190 | avio_wb64(pb, 0); /* annotation field */ | |
191 | avio_flush(pb); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static int au_write_trailer(AVFormatContext *s) | |
197 | { | |
198 | AVIOContext *pb = s->pb; | |
199 | int64_t file_size = avio_tell(pb); | |
200 | ||
201 | if (s->pb->seekable && file_size < INT32_MAX) { | |
202 | /* update file size */ | |
203 | avio_seek(pb, 8, SEEK_SET); | |
204 | avio_wb32(pb, (uint32_t)(file_size - AU_HEADER_SIZE)); | |
205 | avio_seek(pb, file_size, SEEK_SET); | |
206 | avio_flush(pb); | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | AVOutputFormat ff_au_muxer = { | |
213 | .name = "au", | |
214 | .long_name = NULL_IF_CONFIG_SMALL("Sun AU"), | |
215 | .mime_type = "audio/basic", | |
216 | .extensions = "au", | |
217 | .audio_codec = AV_CODEC_ID_PCM_S16BE, | |
218 | .video_codec = AV_CODEC_ID_NONE, | |
219 | .write_header = au_write_header, | |
220 | .write_packet = ff_raw_write_packet, | |
221 | .write_trailer = au_write_trailer, | |
222 | .codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 }, | |
223 | .flags = AVFMT_NOTIMESTAMPS, | |
224 | }; | |
225 | ||
226 | #endif /* CONFIG_AU_MUXER */ |