e8644f1d5c19ff4f8f9eeebc92852565aef4672d
[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 #endif /* CONFIG_WAV_MUXER */
123
124 /* return the size of the found tag */
125 static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
126 {
127 unsigned int tag;
128 int64_t size;
129
130 for(;;) {
131 if (url_feof(pb))
132 return -1;
133 tag = get_le32(pb);
134 size = get_le32(pb);
135 if (tag == tag1)
136 break;
137 url_fseek(pb, size, SEEK_CUR);
138 }
139 return size;
140 }
141
142 static int wav_probe(AVProbeData *p)
143 {
144 /* check file header */
145 if (p->buf_size <= 32)
146 return 0;
147 if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
148 p->buf[2] == 'F' && p->buf[3] == 'F' &&
149 p->buf[8] == 'W' && p->buf[9] == 'A' &&
150 p->buf[10] == 'V' && p->buf[11] == 'E')
151 /*
152 Since ACT demuxer has standard WAV header at top of it's own,
153 returning score is decreased to avoid probe conflict
154 between ACT and WAV.
155 */
156 return AVPROBE_SCORE_MAX - 1;
157 else
158 return 0;
159 }
160
161 /* wav input */
162 static int wav_read_header(AVFormatContext *s,
163 AVFormatParameters *ap)
164 {
165 int64_t size;
166 unsigned int tag;
167 ByteIOContext *pb = s->pb;
168 AVStream *st;
169 WAVContext *wav = s->priv_data;
170
171 /* check RIFF header */
172 tag = get_le32(pb);
173
174 if (tag != MKTAG('R', 'I', 'F', 'F'))
175 return -1;
176 get_le32(pb); /* file size */
177 tag = get_le32(pb);
178 if (tag != MKTAG('W', 'A', 'V', 'E'))
179 return -1;
180
181 /* parse fmt header */
182 size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
183 if (size < 0)
184 return -1;
185 st = av_new_stream(s, 0);
186 if (!st)
187 return AVERROR(ENOMEM);
188
189 ff_get_wav_header(pb, st->codec, size);
190 st->need_parsing = AVSTREAM_PARSE_FULL;
191
192 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
193
194 size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
195 if (size < 0)
196 return -1;
197 wav->data_end= url_ftell(pb) + size;
198 return 0;
199 }
200
201 #if CONFIG_W64_DEMUXER
202
203 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
204 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
205
206 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
207 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
208
209 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
210 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
211
212 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
213 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
214
215 static int w64_probe(AVProbeData *p)
216 {
217 if (p->buf_size <= 40)
218 return 0;
219 if (!memcmp(p->buf, guid_riff, 16) &&
220 !memcmp(p->buf + 24, guid_wave, 16)) {
221 return AVPROBE_SCORE_MAX;
222 } else
223 return 0;
224 }
225
226 /** Find chunk with w64 GUID by skipping over other chunks
227 * @return the size of the found chunk
228 */
229 static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16])
230 {
231 uint8_t guid[16];
232 int64_t size;
233
234 while (!url_feof(pb)) {
235 get_buffer(pb, guid, 16);
236 size = get_le64(pb);
237 if (size <= 24)
238 return -1;
239 if (!memcmp(guid, guid1, 16))
240 return size;
241 url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24);
242 }
243 return -1;
244 }
245
246 static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
247 {
248 int64_t size;
249 ByteIOContext *pb = s->pb;
250 WAVContext *wav = s->priv_data;
251 AVStream *st;
252 uint8_t guid[16];
253
254 get_buffer(pb, guid, 16);
255 if (memcmp(guid, guid_riff, 16))
256 return -1;
257
258 if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
259 return -1;
260
261 get_buffer(pb, guid, 16);
262 if (memcmp(guid, guid_wave, 16)) {
263 av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
264 return -1;
265 }
266
267 size = find_guid(pb, guid_fmt);
268 if (size < 0) {
269 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
270 return -1;
271 }
272
273 st = av_new_stream(s, 0);
274 if (!st)
275 return AVERROR(ENOMEM);
276
277 /* subtract chunk header size - normal wav file doesn't count it */
278 ff_get_wav_header(pb, st->codec, size - 24);
279 url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);
280
281 st->need_parsing = AVSTREAM_PARSE_FULL;
282
283 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
284
285 size = find_guid(pb, guid_data);
286 if (size < 0) {
287 av_log(s, AV_LOG_ERROR, "could not find data guid\n");
288 return -1;
289 }
290 wav->data_end = url_ftell(pb) + size - 24;
291 wav->w64 = 1;
292
293 return 0;
294 }
295 #endif /* CONFIG_W64_DEMUXER */
296
297 #define MAX_SIZE 4096
298
299 static int wav_read_packet(AVFormatContext *s,
300 AVPacket *pkt)
301 {
302 int ret, size;
303 int64_t left;
304 AVStream *st;
305 WAVContext *wav = s->priv_data;
306
307 if (url_feof(s->pb))
308 return AVERROR(EIO);
309 st = s->streams[0];
310
311 left= wav->data_end - url_ftell(s->pb);
312 if(left <= 0){
313 if (CONFIG_W64_DEMUXER && wav->w64) {
314 left = find_guid(s->pb, guid_data) - 24;
315 } else
316 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
317 if (left < 0) {
318 return AVERROR(EIO);
319 }
320 wav->data_end= url_ftell(s->pb) + left;
321 }
322
323 size = MAX_SIZE;
324 if (st->codec->block_align > 1) {
325 if (size < st->codec->block_align)
326 size = st->codec->block_align;
327 size = (size / st->codec->block_align) * st->codec->block_align;
328 }
329 size= FFMIN(size, left);
330 ret= av_get_packet(s->pb, pkt, size);
331 if (ret <= 0)
332 return AVERROR(EIO);
333 pkt->stream_index = 0;
334
335 /* note: we need to modify the packet size here to handle the last
336 packet */
337 pkt->size = ret;
338 return ret;
339 }
340
341 static int wav_read_seek(AVFormatContext *s,
342 int stream_index, int64_t timestamp, int flags)
343 {
344 AVStream *st;
345
346 st = s->streams[0];
347 switch(st->codec->codec_id) {
348 case CODEC_ID_MP2:
349 case CODEC_ID_MP3:
350 case CODEC_ID_AC3:
351 case CODEC_ID_DTS:
352 /* use generic seeking with dynamically generated indexes */
353 return -1;
354 default:
355 break;
356 }
357 return pcm_read_seek(s, stream_index, timestamp, flags);
358 }
359
360 #if CONFIG_WAV_DEMUXER
361 AVInputFormat wav_demuxer = {
362 "wav",
363 NULL_IF_CONFIG_SMALL("WAV format"),
364 sizeof(WAVContext),
365 wav_probe,
366 wav_read_header,
367 wav_read_packet,
368 NULL,
369 wav_read_seek,
370 .flags= AVFMT_GENERIC_INDEX,
371 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
372 };
373 #endif
374 #if CONFIG_WAV_MUXER
375 AVOutputFormat wav_muxer = {
376 "wav",
377 NULL_IF_CONFIG_SMALL("WAV format"),
378 "audio/x-wav",
379 "wav",
380 sizeof(WAVContext),
381 CODEC_ID_PCM_S16LE,
382 CODEC_ID_NONE,
383 wav_write_header,
384 wav_write_packet,
385 wav_write_trailer,
386 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
387 };
388 #endif
389 #if CONFIG_W64_DEMUXER
390 AVInputFormat w64_demuxer = {
391 "w64",
392 NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
393 sizeof(WAVContext),
394 w64_probe,
395 w64_read_header,
396 wav_read_packet,
397 NULL,
398 wav_read_seek,
399 .flags = AVFMT_GENERIC_INDEX,
400 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
401 };
402 #endif