AAC: Simplify some logic from r19956. (The escape codebook is unsigned.)
[libav.git] / libavformat / wav.c
CommitLineData
115329f1 1/*
7fbde343 2 * WAV muxer and demuxer
406792e7 3 * Copyright (c) 2001, 2002 Fabrice Bellard
de6d9b64 4 *
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5 * Sony Wave64 demuxer
6 * Copyright (c) 2009 Daniel Verkamp
7 *
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8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
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11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
b78e7197 13 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 14 *
b78e7197 15 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
de6d9b64 19 *
19720f15 20 * You should have received a copy of the GNU Lesser General Public
b78e7197 21 * License along with FFmpeg; if not, write to the Free Software
5509bffa 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 23 */
de6d9b64 24#include "avformat.h"
7241a6bb 25#include "raw.h"
9d9f4119 26#include "riff.h"
46a3d068 27
de6d9b64 28typedef struct {
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29 int64_t data;
30 int64_t data_end;
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31 int64_t minpts;
32 int64_t maxpts;
33 int last_duration;
740e89cf 34 int w64;
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35} WAVContext;
36
b250f9c6 37#if CONFIG_WAV_MUXER
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38static int wav_write_header(AVFormatContext *s)
39{
c9a65ca8 40 WAVContext *wav = s->priv_data;
899681cd 41 ByteIOContext *pb = s->pb;
bc5c918e 42 int64_t fmt, fact;
de6d9b64 43
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44 put_tag(pb, "RIFF");
45 put_le32(pb, 0); /* file length */
46 put_tag(pb, "WAVE");
47
48 /* format header */
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49 fmt = ff_start_tag(pb, "fmt ");
50 if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) {
5165651c 51 av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
f2d65a6c 52 s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE");
1ea4f593 53 av_free(wav);
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54 return -1;
55 }
1a40491e 56 ff_end_tag(pb, fmt);
de6d9b64 57
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58 if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
59 && !url_is_streamed(s->pb)) {
1a40491e 60 fact = ff_start_tag(pb, "fact");
d794d388 61 put_le32(pb, 0);
1a40491e 62 ff_end_tag(pb, fact);
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63 }
64
01f4895c 65 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
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66 wav->maxpts = wav->last_duration = 0;
67 wav->minpts = INT64_MAX;
a1e568bd 68
de6d9b64 69 /* data header */
1a40491e 70 wav->data = ff_start_tag(pb, "data");
115329f1 71
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72 put_flush_packet(pb);
73
74 return 0;
75}
76
e928649b 77static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64 78{
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79 ByteIOContext *pb = s->pb;
80 WAVContext *wav = s->priv_data;
e928649b 81 put_buffer(pb, pkt->data, pkt->size);
d794d388 82 if(pkt->pts != AV_NOPTS_VALUE) {
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83 wav->minpts = FFMIN(wav->minpts, pkt->pts);
84 wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
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85 wav->last_duration = pkt->duration;
86 } else
87 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
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88 return 0;
89}
90
91static int wav_write_trailer(AVFormatContext *s)
92{
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93 ByteIOContext *pb = s->pb;
94 WAVContext *wav = s->priv_data;
bc5c918e 95 int64_t file_size;
de6d9b64 96
899681cd 97 if (!url_is_streamed(s->pb)) {
1a40491e 98 ff_end_tag(pb, wav->data);
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99
100 /* update file size */
101 file_size = url_ftell(pb);
102 url_fseek(pb, 4, SEEK_SET);
0c1a9eda 103 put_le32(pb, (uint32_t)(file_size - 8));
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104 url_fseek(pb, file_size, SEEK_SET);
105
106 put_flush_packet(pb);
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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 }
de6d9b64 119 }
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120 return 0;
121}
8212568a 122#endif /* CONFIG_WAV_MUXER */
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123
124/* return the size of the found tag */
502d6c0a 125static int64_t find_tag(ByteIOContext *pb, uint32_t tag1)
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126{
127 unsigned int tag;
502d6c0a 128 int64_t size;
de6d9b64 129
c5e86106 130 for (;;) {
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131 if (url_feof(pb))
132 return -1;
c5e86106 133 tag = get_le32(pb);
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134 size = get_le32(pb);
135 if (tag == tag1)
136 break;
137 url_fseek(pb, size, SEEK_CUR);
138 }
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139 return size;
140}
141
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142static int wav_probe(AVProbeData *p)
143{
144 /* check file header */
145 if (p->buf_size <= 32)
146 return 0;
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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' &&
c9a65ca8 150 p->buf[10] == 'V' && p->buf[11] == 'E')
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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;
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157 else
158 return 0;
159}
160
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161/* wav input */
162static int wav_read_header(AVFormatContext *s,
163 AVFormatParameters *ap)
164{
502d6c0a 165 int64_t size;
de6d9b64 166 unsigned int tag;
899681cd 167 ByteIOContext *pb = s->pb;
de6d9b64 168 AVStream *st;
b582d7ba 169 WAVContext *wav = s->priv_data;
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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;
115329f1 180
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181 /* parse fmt header */
182 size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
183 if (size < 0)
184 return -1;
c9a65ca8 185 st = av_new_stream(s, 0);
de6d9b64 186 if (!st)
769e10f0 187 return AVERROR(ENOMEM);
de6d9b64 188
1a40491e 189 ff_get_wav_header(pb, st->codec, size);
57004ff1 190 st->need_parsing = AVSTREAM_PARSE_FULL;
595bf4ef 191
01f4895c 192 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
595bf4ef 193
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194 size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
195 if (size < 0)
196 return -1;
b582d7ba 197 wav->data_end= url_ftell(pb) + size;
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198 return 0;
199}
200
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201#if CONFIG_W64_DEMUXER
202
203static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
204 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
205
206static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
207 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
208
209static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
210 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
211
212static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
213 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
214
215static int w64_probe(AVProbeData *p)
216{
217 if (p->buf_size <= 40)
218 return 0;
219 if (!memcmp(p->buf, guid_riff, 16) &&
c5e86106 220 !memcmp(p->buf + 24, guid_wave, 16))
740e89cf 221 return AVPROBE_SCORE_MAX;
c5e86106 222 else
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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 */
229static 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
246static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
247{
248 int64_t size;
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249 ByteIOContext *pb = s->pb;
250 WAVContext *wav = s->priv_data;
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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;
c5e86106 291 wav->w64 = 1;
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292
293 return 0;
294}
295#endif /* CONFIG_W64_DEMUXER */
296
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297#define MAX_SIZE 4096
298
299static int wav_read_packet(AVFormatContext *s,
300 AVPacket *pkt)
301{
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302 int ret, size;
303 int64_t left;
f9b5459e 304 AVStream *st;
b582d7ba 305 WAVContext *wav = s->priv_data;
de6d9b64 306
899681cd 307 if (url_feof(s->pb))
6f3e0b21 308 return AVERROR(EIO);
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309 st = s->streams[0];
310
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311 left = wav->data_end - url_ftell(s->pb);
312 if (left <= 0){
313 if (CONFIG_W64_DEMUXER && wav->w64)
740e89cf 314 left = find_guid(s->pb, guid_data) - 24;
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315 else
316 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
317 if (left < 0)
6f3e0b21 318 return AVERROR(EIO);
899681cd 319 wav->data_end= url_ftell(s->pb) + left;
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320 }
321
f9b5459e 322 size = MAX_SIZE;
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323 if (st->codec->block_align > 1) {
324 if (size < st->codec->block_align)
325 size = st->codec->block_align;
326 size = (size / st->codec->block_align) * st->codec->block_align;
f9b5459e 327 }
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328 size = FFMIN(size, left);
329 ret = av_get_packet(s->pb, pkt, size);
e9b78eeb 330 if (ret <= 0)
6f3e0b21 331 return AVERROR(EIO);
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332 pkt->stream_index = 0;
333
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334 /* note: we need to modify the packet size here to handle the last
335 packet */
336 pkt->size = ret;
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337 return ret;
338}
339
115329f1 340static int wav_read_seek(AVFormatContext *s,
7b3c1382 341 int stream_index, int64_t timestamp, int flags)
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342{
343 AVStream *st;
344
345 st = s->streams[0];
c5e86106 346 switch (st->codec->codec_id) {
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347 case CODEC_ID_MP2:
348 case CODEC_ID_MP3:
349 case CODEC_ID_AC3:
23c99253 350 case CODEC_ID_DTS:
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351 /* use generic seeking with dynamically generated indexes */
352 return -1;
353 default:
354 break;
355 }
7b3c1382 356 return pcm_read_seek(s, stream_index, timestamp, flags);
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357}
358
b250f9c6 359#if CONFIG_WAV_DEMUXER
ff70e601 360AVInputFormat wav_demuxer = {
c9a65ca8 361 "wav",
bde15e74 362 NULL_IF_CONFIG_SMALL("WAV format"),
b582d7ba 363 sizeof(WAVContext),
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364 wav_probe,
365 wav_read_header,
366 wav_read_packet,
9b64a036 367 NULL,
f9b5459e 368 wav_read_seek,
e9b78eeb 369 .flags= AVFMT_GENERIC_INDEX,
1a40491e 370 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
c9a65ca8 371};
ff70e601 372#endif
c5e86106 373
b250f9c6 374#if CONFIG_WAV_MUXER
ff70e601 375AVOutputFormat wav_muxer = {
de6d9b64 376 "wav",
bde15e74 377 NULL_IF_CONFIG_SMALL("WAV format"),
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378 "audio/x-wav",
379 "wav",
c9a65ca8 380 sizeof(WAVContext),
5ed8fafc 381 CODEC_ID_PCM_S16LE,
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382 CODEC_ID_NONE,
383 wav_write_header,
384 wav_write_packet,
385 wav_write_trailer,
1a40491e 386 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
de6d9b64 387};
ff70e601 388#endif
c5e86106 389
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390#if CONFIG_W64_DEMUXER
391AVInputFormat w64_demuxer = {
392 "w64",
393 NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
394 sizeof(WAVContext),
395 w64_probe,
396 w64_read_header,
397 wav_read_packet,
398 NULL,
399 wav_read_seek,
400 .flags = AVFMT_GENERIC_INDEX,
401 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
402};
403#endif