9487fc3e7a396d089c78f7d0aca76ce10f55f95e
[libav.git] / libavformat / wav.c
1 /*
2 * WAV muxer and demuxer
3 * Copyright (c) 2001, 2002 Fabrice Bellard
4 *
5 * Sony Wave64 demuxer
6 * Copyright (c) 2009 Daniel Verkamp
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24 #include "avformat.h"
25 #include "raw.h"
26 #include "riff.h"
27
28 typedef struct {
29 int64_t data;
30 int64_t data_end;
31 int64_t minpts;
32 int64_t maxpts;
33 int last_duration;
34 int w64;
35 } WAVContext;
36
37 #if CONFIG_WAV_MUXER
38 static int wav_write_header(AVFormatContext *s)
39 {
40 WAVContext *wav = s->priv_data;
41 ByteIOContext *pb = s->pb;
42 int64_t fmt, fact;
43
44 put_tag(pb, "RIFF");
45 put_le32(pb, 0); /* file length */
46 put_tag(pb, "WAVE");
47
48 /* format header */
49 fmt = ff_start_tag(pb, "fmt ");
50 if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
51 av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
52 s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
53 av_free(wav);
54 return -1;
55 }
56 ff_end_tag(pb, fmt);
57
58 if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
59 && !url_is_streamed(s->pb)) {
60 fact = ff_start_tag(pb, "fact");
61 put_le32(pb, 0);
62 ff_end_tag(pb, fact);
63 }
64
65 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
66 wav->maxpts = wav->last_duration = 0;
67 wav->minpts = INT64_MAX;
68
69 /* data header */
70 wav->data = ff_start_tag(pb, "data");
71
72 put_flush_packet(pb);
73
74 return 0;
75 }
76
77 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
78 {
79 ByteIOContext *pb = s->pb;
80 WAVContext *wav = s->priv_data;
81 put_buffer(pb, pkt->data, pkt->size);
82 if(pkt->pts != AV_NOPTS_VALUE) {
83 wav->minpts = FFMIN(wav->minpts, pkt->pts);
84 wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
85 wav->last_duration = pkt->duration;
86 } else
87 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
88 return 0;
89 }
90
91 static int wav_write_trailer(AVFormatContext *s)
92 {
93 ByteIOContext *pb = s->pb;
94 WAVContext *wav = s->priv_data;
95 int64_t file_size;
96
97 if (!url_is_streamed(s->pb)) {
98 ff_end_tag(pb, wav->data);
99
100 /* update file size */
101 file_size = url_ftell(pb);
102 url_fseek(pb, 4, SEEK_SET);
103 put_le32(pb, (uint32_t)(file_size - 8));
104 url_fseek(pb, file_size, SEEK_SET);
105
106 put_flush_packet(pb);
107
108 if(s->streams[0]->codec->codec_tag != 0x01) {
109 /* Update num_samps in fact chunk */
110 int number_of_samples;
111 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
112 s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
113 s->streams[0]->time_base.den);
114 url_fseek(pb, wav->data-12, SEEK_SET);
115 put_le32(pb, number_of_samples);
116 url_fseek(pb, file_size, SEEK_SET);
117 put_flush_packet(pb);
118 }
119 }
120 return 0;
121 }
122
123 AVOutputFormat wav_muxer = {
124 "wav",
125 NULL_IF_CONFIG_SMALL("WAV format"),
126 "audio/x-wav",
127 "wav",
128 sizeof(WAVContext),
129 CODEC_ID_PCM_S16LE,
130 CODEC_ID_NONE,
131 wav_write_header,
132 wav_write_packet,
133 wav_write_trailer,
134 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
135 };
136 #endif /* CONFIG_WAV_MUXER */
137
138
139 #if CONFIG_WAV_DEMUXER
140 /* return the size of the found tag */
141 static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
142 {
143 unsigned int tag;
144 int64_t size;
145
146 for (;;) {
147 if (url_feof(pb))
148 return -1;
149 tag = get_le32(pb);
150 size = get_le32(pb);
151 if (tag == tag1)
152 break;
153 url_fseek(pb, size, SEEK_CUR);
154 }
155 return size;
156 }
157
158 static int wav_probe(AVProbeData *p)
159 {
160 /* check file header */
161 if (p->buf_size <= 32)
162 return 0;
163 if (p->buf[ 0] == 'R' && p->buf[ 1] == 'I' &&
164 p->buf[ 2] == 'F' && p->buf[ 3] == 'F' &&
165 p->buf[ 8] == 'W' && p->buf[ 9] == 'A' &&
166 p->buf[10] == 'V' && p->buf[11] == 'E')
167 /*
168 Since ACT demuxer has standard WAV header at top of it's own,
169 returning score is decreased to avoid probe conflict
170 between ACT and WAV.
171 */
172 return AVPROBE_SCORE_MAX - 1;
173 else
174 return 0;
175 }
176
177 /* wav input */
178 static int wav_read_header(AVFormatContext *s,
179 AVFormatParameters *ap)
180 {
181 int64_t size;
182 unsigned int tag;
183 ByteIOContext *pb = s->pb;
184 AVStream *st;
185 WAVContext *wav = s->priv_data;
186
187 /* check RIFF header */
188 tag = get_le32(pb);
189
190 if (tag != MKTAG('R', 'I', 'F', 'F'))
191 return -1;
192 get_le32(pb); /* file size */
193 tag = get_le32(pb);
194 if (tag != MKTAG('W', 'A', 'V', 'E'))
195 return -1;
196
197 /* parse fmt header */
198 size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
199 if (size < 0)
200 return -1;
201 st = av_new_stream(s, 0);
202 if (!st)
203 return AVERROR(ENOMEM);
204
205 ff_get_wav_header(pb, st->codec, size);
206 st->need_parsing = AVSTREAM_PARSE_FULL;
207
208 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
209
210 size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
211 if (size < 0)
212 return -1;
213 wav->data_end= url_ftell(pb) + size;
214 return 0;
215 }
216
217 /** Find chunk with w64 GUID by skipping over other chunks
218 * @return the size of the found chunk
219 */
220 static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16])
221 {
222 uint8_t guid[16];
223 int64_t size;
224
225 while (!url_feof(pb)) {
226 get_buffer(pb, guid, 16);
227 size = get_le64(pb);
228 if (size <= 24)
229 return -1;
230 if (!memcmp(guid, guid1, 16))
231 return size;
232 url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24);
233 }
234 return -1;
235 }
236
237 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
238 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
239
240 #define MAX_SIZE 4096
241
242 static int wav_read_packet(AVFormatContext *s,
243 AVPacket *pkt)
244 {
245 int ret, size;
246 int64_t left;
247 AVStream *st;
248 WAVContext *wav = s->priv_data;
249
250 st = s->streams[0];
251
252 left = wav->data_end - url_ftell(s->pb);
253 if (left <= 0){
254 if (CONFIG_W64_DEMUXER && wav->w64)
255 left = find_guid(s->pb, guid_data) - 24;
256 else
257 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
258 if (left < 0)
259 return AVERROR(EIO);
260 wav->data_end= url_ftell(s->pb) + left;
261 }
262
263 size = MAX_SIZE;
264 if (st->codec->block_align > 1) {
265 if (size < st->codec->block_align)
266 size = st->codec->block_align;
267 size = (size / st->codec->block_align) * st->codec->block_align;
268 }
269 size = FFMIN(size, left);
270 ret = av_get_packet(s->pb, pkt, size);
271 if (ret <= 0)
272 return AVERROR(EIO);
273 pkt->stream_index = 0;
274
275 return ret;
276 }
277
278 static int wav_read_seek(AVFormatContext *s,
279 int stream_index, int64_t timestamp, int flags)
280 {
281 AVStream *st;
282
283 st = s->streams[0];
284 switch (st->codec->codec_id) {
285 case CODEC_ID_MP2:
286 case CODEC_ID_MP3:
287 case CODEC_ID_AC3:
288 case CODEC_ID_DTS:
289 /* use generic seeking with dynamically generated indexes */
290 return -1;
291 default:
292 break;
293 }
294 return pcm_read_seek(s, stream_index, timestamp, flags);
295 }
296
297 AVInputFormat wav_demuxer = {
298 "wav",
299 NULL_IF_CONFIG_SMALL("WAV format"),
300 sizeof(WAVContext),
301 wav_probe,
302 wav_read_header,
303 wav_read_packet,
304 NULL,
305 wav_read_seek,
306 .flags= AVFMT_GENERIC_INDEX,
307 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
308 };
309 #endif /* CONFIG_WAV_DEMUXER */
310
311
312 #if CONFIG_W64_DEMUXER
313 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
314 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
315
316 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
317 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
318
319 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
320 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
321
322 static int w64_probe(AVProbeData *p)
323 {
324 if (p->buf_size <= 40)
325 return 0;
326 if (!memcmp(p->buf, guid_riff, 16) &&
327 !memcmp(p->buf + 24, guid_wave, 16))
328 return AVPROBE_SCORE_MAX;
329 else
330 return 0;
331 }
332
333 static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
334 {
335 int64_t size;
336 ByteIOContext *pb = s->pb;
337 WAVContext *wav = s->priv_data;
338 AVStream *st;
339 uint8_t guid[16];
340
341 get_buffer(pb, guid, 16);
342 if (memcmp(guid, guid_riff, 16))
343 return -1;
344
345 if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
346 return -1;
347
348 get_buffer(pb, guid, 16);
349 if (memcmp(guid, guid_wave, 16)) {
350 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
351 return -1;
352 }
353
354 size = find_guid(pb, guid_fmt);
355 if (size < 0) {
356 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
357 return -1;
358 }
359
360 st = av_new_stream(s, 0);
361 if (!st)
362 return AVERROR(ENOMEM);
363
364 /* subtract chunk header size - normal wav file doesn't count it */
365 ff_get_wav_header(pb, st->codec, size - 24);
366 url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);
367
368 st->need_parsing = AVSTREAM_PARSE_FULL;
369
370 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
371
372 size = find_guid(pb, guid_data);
373 if (size < 0) {
374 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
375 return -1;
376 }
377 wav->data_end = url_ftell(pb) + size - 24;
378 wav->w64 = 1;
379
380 return 0;
381 }
382
383 AVInputFormat w64_demuxer = {
384 "w64",
385 NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
386 sizeof(WAVContext),
387 w64_probe,
388 w64_read_header,
389 wav_read_packet,
390 NULL,
391 wav_read_seek,
392 .flags = AVFMT_GENERIC_INDEX,
393 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
394 };
395 #endif /* CONFIG_W64_DEMUXER */