Commit | Line | Data |
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de6d9b64 FB |
1 | /* |
2 | * WAV encoder and decoder | |
e095026a | 3 | * Copyright (c) 2001, 2002 Fabrice Bellard. |
de6d9b64 | 4 | * |
19720f15 FB |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; either | |
8 | * version 2 of the License, or (at your option) any later version. | |
de6d9b64 | 9 | * |
19720f15 | 10 | * This library is distributed in the hope that it will be useful, |
de6d9b64 | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19720f15 FB |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. | |
de6d9b64 | 14 | * |
19720f15 FB |
15 | * You should have received a copy of the GNU Lesser General Public |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
de6d9b64 | 18 | */ |
de6d9b64 FB |
19 | #include "avformat.h" |
20 | #include "avi.h" | |
21 | ||
e8c00089 | 22 | const CodecTag codec_wav_tags[] = { |
46a3d068 | 23 | { CODEC_ID_MP2, 0x50 }, |
80783dc2 | 24 | { CODEC_ID_MP3, 0x55 }, |
46a3d068 FB |
25 | { CODEC_ID_AC3, 0x2000 }, |
26 | { CODEC_ID_PCM_S16LE, 0x01 }, | |
27 | { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */ | |
28 | { CODEC_ID_PCM_ALAW, 0x06 }, | |
29 | { CODEC_ID_PCM_MULAW, 0x07 }, | |
0147f198 FR |
30 | { CODEC_ID_ADPCM_MS, 0x02 }, |
31 | { CODEC_ID_ADPCM_IMA_WAV, 0x11 }, | |
048446bf MM |
32 | { CODEC_ID_ADPCM_IMA_DK4, 0x61 }, /* rogue format number */ |
33 | { CODEC_ID_ADPCM_IMA_DK3, 0x62 }, /* rogue format number */ | |
e095026a FB |
34 | { CODEC_ID_WMAV1, 0x160 }, |
35 | { CODEC_ID_WMAV2, 0x161 }, | |
46a3d068 FB |
36 | { 0, 0 }, |
37 | }; | |
38 | ||
764ef400 | 39 | #ifdef CONFIG_ENCODERS |
46a3d068 | 40 | /* WAVEFORMATEX header */ |
afc25d93 | 41 | /* returns the size or -1 on error */ |
46a3d068 FB |
42 | int put_wav_header(ByteIOContext *pb, AVCodecContext *enc) |
43 | { | |
bd5a6020 | 44 | int bps, blkalign, bytespersec; |
afc25d93 | 45 | int hdrsize = 18; |
46a3d068 | 46 | |
bd5a6020 MN |
47 | if(!enc->codec_tag) |
48 | enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id); | |
49 | if(!enc->codec_tag) | |
46a3d068 | 50 | return -1; |
bd5a6020 MN |
51 | |
52 | put_le16(pb, enc->codec_tag); | |
46a3d068 FB |
53 | put_le16(pb, enc->channels); |
54 | put_le32(pb, enc->sample_rate); | |
46a3d068 FB |
55 | if (enc->codec_id == CODEC_ID_PCM_U8 || |
56 | enc->codec_id == CODEC_ID_PCM_ALAW || | |
57 | enc->codec_id == CODEC_ID_PCM_MULAW) { | |
58 | bps = 8; | |
80783dc2 | 59 | } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) { |
86bec9a1 | 60 | bps = 0; |
889c5224 FR |
61 | } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS) { |
62 | bps = 4; | |
46a3d068 FB |
63 | } else { |
64 | bps = 16; | |
65 | } | |
46a3d068 | 66 | |
80783dc2 | 67 | if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) { |
86bec9a1 | 68 | blkalign = 1; |
4b1f4f23 | 69 | //blkalign = 144 * enc->bit_rate/enc->sample_rate; |
0147f198 FR |
70 | } else if (enc->block_align != 0) { /* specified by the codec */ |
71 | blkalign = enc->block_align; | |
4b1f4f23 | 72 | } else |
86bec9a1 J |
73 | blkalign = enc->channels*bps >> 3; |
74 | if (enc->codec_id == CODEC_ID_PCM_U8 || | |
75 | enc->codec_id == CODEC_ID_PCM_S16LE) { | |
76 | bytespersec = enc->sample_rate * blkalign; | |
77 | } else { | |
78 | bytespersec = enc->bit_rate / 8; | |
79 | } | |
80 | put_le32(pb, bytespersec); /* bytes per second */ | |
81 | put_le16(pb, blkalign); /* block align */ | |
82 | put_le16(pb, bps); /* bits per sample */ | |
80783dc2 | 83 | if (enc->codec_id == CODEC_ID_MP3) { |
86bec9a1 | 84 | put_le16(pb, 12); /* wav_extra_size */ |
afc25d93 | 85 | hdrsize += 12; |
86bec9a1 J |
86 | put_le16(pb, 1); /* wID */ |
87 | put_le32(pb, 2); /* fdwFlags */ | |
88 | put_le16(pb, 1152); /* nBlockSize */ | |
89 | put_le16(pb, 1); /* nFramesPerBlock */ | |
90 | put_le16(pb, 1393); /* nCodecDelay */ | |
4b1f4f23 J |
91 | } else if (enc->codec_id == CODEC_ID_MP2) { |
92 | put_le16(pb, 22); /* wav_extra_size */ | |
afc25d93 | 93 | hdrsize += 22; |
4b1f4f23 J |
94 | put_le16(pb, 2); /* fwHeadLayer */ |
95 | put_le32(pb, enc->bit_rate); /* dwHeadBitrate */ | |
96 | put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */ | |
97 | put_le16(pb, 0); /* fwHeadModeExt */ | |
98 | put_le16(pb, 1); /* wHeadEmphasis */ | |
99 | put_le16(pb, 16); /* fwHeadFlags */ | |
100 | put_le32(pb, 0); /* dwPTSLow */ | |
101 | put_le32(pb, 0); /* dwPTSHigh */ | |
889c5224 FR |
102 | } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) { |
103 | put_le16(pb, 2); /* wav_extra_size */ | |
104 | put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */ | |
86bec9a1 J |
105 | } else |
106 | put_le16(pb, 0); /* wav_extra_size */ | |
107 | ||
afc25d93 | 108 | return hdrsize; |
46a3d068 | 109 | } |
764ef400 | 110 | #endif //CONFIG_ENCODERS |
46a3d068 | 111 | |
2e7973bb RS |
112 | /* We could be given one of the three possible structures here: |
113 | * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure | |
114 | * is an expansion of the previous one with the fields added | |
115 | * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and | |
116 | * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself | |
117 | * an openended structure. | |
118 | */ | |
119 | void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size) | |
e095026a | 120 | { |
e8c00089 | 121 | int id; |
e095026a FB |
122 | |
123 | id = get_le16(pb); | |
124 | codec->codec_type = CODEC_TYPE_AUDIO; | |
125 | codec->codec_tag = id; | |
e095026a FB |
126 | codec->channels = get_le16(pb); |
127 | codec->sample_rate = get_le32(pb); | |
128 | codec->bit_rate = get_le32(pb) * 8; | |
129 | codec->block_align = get_le16(pb); | |
2e7973bb RS |
130 | if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */ |
131 | codec->bits_per_sample = 8; | |
e0ece99a MN |
132 | }else |
133 | codec->bits_per_sample = get_le16(pb); | |
134 | codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample); | |
135 | ||
2e7973bb | 136 | if (size > 16) { /* We're obviously dealing with WAVEFORMATEX */ |
cb146faf ZK |
137 | codec->extradata_size = get_le16(pb); |
138 | if (codec->extradata_size > 0) { | |
2e7973bb RS |
139 | if (codec->extradata_size > size - 18) |
140 | codec->extradata_size = size - 18; | |
cb146faf ZK |
141 | codec->extradata = av_mallocz(codec->extradata_size); |
142 | get_buffer(pb, codec->extradata, codec->extradata_size); | |
2e7973bb RS |
143 | } else |
144 | codec->extradata_size = 0; | |
145 | ||
146 | /* It is possible for the chunk to contain garbage at the end */ | |
147 | if (size - codec->extradata_size - 18 > 0) | |
148 | url_fskip(pb, size - codec->extradata_size - 18); | |
e095026a FB |
149 | } |
150 | } | |
151 | ||
152 | ||
46a3d068 FB |
153 | int wav_codec_get_id(unsigned int tag, int bps) |
154 | { | |
155 | int id; | |
156 | id = codec_get_id(codec_wav_tags, tag); | |
157 | if (id <= 0) | |
158 | return id; | |
159 | /* handle specific u8 codec */ | |
160 | if (id == CODEC_ID_PCM_S16LE && bps == 8) | |
161 | id = CODEC_ID_PCM_U8; | |
162 | return id; | |
163 | } | |
164 | ||
764ef400 | 165 | #ifdef CONFIG_ENCODERS |
de6d9b64 FB |
166 | typedef struct { |
167 | offset_t data; | |
168 | } WAVContext; | |
169 | ||
170 | static int wav_write_header(AVFormatContext *s) | |
171 | { | |
c9a65ca8 | 172 | WAVContext *wav = s->priv_data; |
de6d9b64 FB |
173 | ByteIOContext *pb = &s->pb; |
174 | offset_t fmt; | |
175 | ||
de6d9b64 FB |
176 | put_tag(pb, "RIFF"); |
177 | put_le32(pb, 0); /* file length */ | |
178 | put_tag(pb, "WAVE"); | |
179 | ||
180 | /* format header */ | |
181 | fmt = start_tag(pb, "fmt "); | |
46a3d068 | 182 | if (put_wav_header(pb, &s->streams[0]->codec) < 0) { |
1ea4f593 | 183 | av_free(wav); |
46a3d068 FB |
184 | return -1; |
185 | } | |
de6d9b64 FB |
186 | end_tag(pb, fmt); |
187 | ||
188 | /* data header */ | |
189 | wav->data = start_tag(pb, "data"); | |
190 | ||
191 | put_flush_packet(pb); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static int wav_write_packet(AVFormatContext *s, int stream_index_ptr, | |
49057904 | 197 | const uint8_t *buf, int size, int64_t pts) |
de6d9b64 FB |
198 | { |
199 | ByteIOContext *pb = &s->pb; | |
200 | put_buffer(pb, buf, size); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int wav_write_trailer(AVFormatContext *s) | |
205 | { | |
206 | ByteIOContext *pb = &s->pb; | |
207 | WAVContext *wav = s->priv_data; | |
208 | offset_t file_size; | |
209 | ||
210 | if (!url_is_streamed(&s->pb)) { | |
211 | end_tag(pb, wav->data); | |
212 | ||
213 | /* update file size */ | |
214 | file_size = url_ftell(pb); | |
215 | url_fseek(pb, 4, SEEK_SET); | |
0c1a9eda | 216 | put_le32(pb, (uint32_t)(file_size - 8)); |
de6d9b64 FB |
217 | url_fseek(pb, file_size, SEEK_SET); |
218 | ||
219 | put_flush_packet(pb); | |
220 | } | |
de6d9b64 FB |
221 | return 0; |
222 | } | |
764ef400 | 223 | #endif //CONFIG_ENCODERS |
de6d9b64 FB |
224 | |
225 | /* return the size of the found tag */ | |
226 | /* XXX: > 2GB ? */ | |
0c1a9eda | 227 | static int find_tag(ByteIOContext *pb, uint32_t tag1) |
de6d9b64 FB |
228 | { |
229 | unsigned int tag; | |
230 | int size; | |
231 | ||
232 | for(;;) { | |
233 | if (url_feof(pb)) | |
234 | return -1; | |
235 | tag = get_le32(pb); | |
236 | size = get_le32(pb); | |
237 | if (tag == tag1) | |
238 | break; | |
239 | url_fseek(pb, size, SEEK_CUR); | |
240 | } | |
241 | if (size < 0) | |
242 | size = 0x7fffffff; | |
243 | return size; | |
244 | } | |
245 | ||
c9a65ca8 FB |
246 | static int wav_probe(AVProbeData *p) |
247 | { | |
248 | /* check file header */ | |
249 | if (p->buf_size <= 32) | |
250 | return 0; | |
251 | if (p->buf[0] == 'R' && p->buf[1] == 'I' && | |
252 | p->buf[2] == 'F' && p->buf[3] == 'F' && | |
253 | p->buf[8] == 'W' && p->buf[9] == 'A' && | |
254 | p->buf[10] == 'V' && p->buf[11] == 'E') | |
255 | return AVPROBE_SCORE_MAX; | |
256 | else | |
257 | return 0; | |
258 | } | |
259 | ||
de6d9b64 FB |
260 | /* wav input */ |
261 | static int wav_read_header(AVFormatContext *s, | |
262 | AVFormatParameters *ap) | |
263 | { | |
264 | int size; | |
265 | unsigned int tag; | |
266 | ByteIOContext *pb = &s->pb; | |
de6d9b64 FB |
267 | AVStream *st; |
268 | ||
269 | /* check RIFF header */ | |
270 | tag = get_le32(pb); | |
271 | ||
272 | if (tag != MKTAG('R', 'I', 'F', 'F')) | |
273 | return -1; | |
274 | get_le32(pb); /* file size */ | |
275 | tag = get_le32(pb); | |
276 | if (tag != MKTAG('W', 'A', 'V', 'E')) | |
277 | return -1; | |
278 | ||
279 | /* parse fmt header */ | |
280 | size = find_tag(pb, MKTAG('f', 'm', 't', ' ')); | |
281 | if (size < 0) | |
282 | return -1; | |
c9a65ca8 | 283 | st = av_new_stream(s, 0); |
de6d9b64 | 284 | if (!st) |
c9a65ca8 | 285 | return AVERROR_NOMEM; |
de6d9b64 | 286 | |
2e7973bb | 287 | get_wav_header(pb, &st->codec, size); |
e095026a FB |
288 | |
289 | size = find_tag(pb, MKTAG('d', 'a', 't', 'a')); | |
290 | if (size < 0) | |
291 | return -1; | |
de6d9b64 FB |
292 | return 0; |
293 | } | |
294 | ||
295 | #define MAX_SIZE 4096 | |
296 | ||
297 | static int wav_read_packet(AVFormatContext *s, | |
298 | AVPacket *pkt) | |
299 | { | |
94ef6864 | 300 | int ret; |
de6d9b64 FB |
301 | |
302 | if (url_feof(&s->pb)) | |
303 | return -EIO; | |
94ef6864 | 304 | if (av_new_packet(pkt, MAX_SIZE)) |
de6d9b64 FB |
305 | return -EIO; |
306 | pkt->stream_index = 0; | |
307 | ||
308 | ret = get_buffer(&s->pb, pkt->data, pkt->size); | |
309 | if (ret < 0) | |
310 | av_free_packet(pkt); | |
5ed8fafc FB |
311 | /* note: we need to modify the packet size here to handle the last |
312 | packet */ | |
313 | pkt->size = ret; | |
de6d9b64 FB |
314 | return ret; |
315 | } | |
316 | ||
317 | static int wav_read_close(AVFormatContext *s) | |
318 | { | |
319 | return 0; | |
320 | } | |
321 | ||
c9a65ca8 FB |
322 | static AVInputFormat wav_iformat = { |
323 | "wav", | |
324 | "wav format", | |
325 | 0, | |
326 | wav_probe, | |
327 | wav_read_header, | |
328 | wav_read_packet, | |
329 | wav_read_close, | |
330 | }; | |
331 | ||
764ef400 | 332 | #ifdef CONFIG_ENCODERS |
c9a65ca8 | 333 | static AVOutputFormat wav_oformat = { |
de6d9b64 FB |
334 | "wav", |
335 | "wav format", | |
336 | "audio/x-wav", | |
337 | "wav", | |
c9a65ca8 | 338 | sizeof(WAVContext), |
5ed8fafc | 339 | CODEC_ID_PCM_S16LE, |
de6d9b64 FB |
340 | CODEC_ID_NONE, |
341 | wav_write_header, | |
342 | wav_write_packet, | |
343 | wav_write_trailer, | |
de6d9b64 | 344 | }; |
764ef400 | 345 | #endif //CONFIG_ENCODERS |
c9a65ca8 FB |
346 | |
347 | int wav_init(void) | |
348 | { | |
349 | av_register_input_format(&wav_iformat); | |
764ef400 | 350 | #ifdef CONFIG_ENCODERS |
c9a65ca8 | 351 | av_register_output_format(&wav_oformat); |
764ef400 | 352 | #endif //CONFIG_ENCODERS |
c9a65ca8 FB |
353 | return 0; |
354 | } |