]>
Commit | Line | Data |
---|---|---|
48e2f01c | 1 | /* |
2 | * Copyright (C) 2013 nu774 | |
3 | * For conditions of distribution and use, see copyright notice in COPYING | |
4 | */ | |
5 | #if HAVE_CONFIG_H | |
6 | # include "config.h" | |
7 | #endif | |
8 | ||
9 | #if HAVE_STDINT_H | |
10 | # include <stdint.h> | |
11 | #endif | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <stdarg.h> | |
17 | #include "wav_reader.h" | |
18 | #include "m4af_endian.h" | |
19 | ||
20 | #define RIFF_FOURCC(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24)) | |
21 | ||
22 | #define TRY_IO(expr) \ | |
23 | do { \ | |
24 | if (expr) \ | |
25 | goto FAIL; \ | |
26 | } while (0) | |
27 | ||
28 | #define ASSERT_FORMAT(ctx, expr) \ | |
29 | do { \ | |
30 | if (!expr) { \ | |
31 | if (!ctx->last_error) \ | |
32 | ctx->last_error = WAV_INVALID_FORMAT; \ | |
33 | goto FAIL;\ | |
34 | } \ | |
35 | } while (0) | |
36 | ||
37 | struct wav_reader_t { | |
2d744bd5 | 38 | pcm_reader_vtbl_t *vtbl; |
48e2f01c | 39 | pcm_sample_description_t sample_format; |
40 | int64_t length; | |
41 | int64_t position; | |
68879398 | 42 | int32_t data_offset; |
48e2f01c | 43 | int ignore_length; |
44 | int last_error; | |
45 | wav_io_context_t io; | |
46 | void *io_cookie; | |
47 | }; | |
48 | ||
49 | static const uint8_t WAV_GUID_PCM[] = { | |
50 | 1, 0, 0, 0, 0, 0, 0x10, 0, 0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71 | |
51 | }; | |
52 | static const uint8_t WAV_GUID_FLOAT[] = { | |
53 | 3, 0, 0, 0, 0, 0, 0x10, 0, 0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71 | |
54 | }; | |
55 | ||
2d744bd5 | 56 | static const pcm_sample_description_t *wav_get_format(pcm_reader_t *reader) |
48e2f01c | 57 | { |
2d744bd5 | 58 | return &((wav_reader_t *)reader)->sample_format; |
48e2f01c | 59 | } |
60 | ||
2d744bd5 | 61 | static int64_t wav_get_length(pcm_reader_t *reader) |
48e2f01c | 62 | { |
2d744bd5 | 63 | return ((wav_reader_t *)reader)->length; |
48e2f01c | 64 | } |
65 | ||
2d744bd5 | 66 | static int64_t wav_get_position(pcm_reader_t *reader) |
48e2f01c | 67 | { |
2d744bd5 | 68 | return ((wav_reader_t *)reader)->position; |
48e2f01c | 69 | } |
70 | ||
2d744bd5 | 71 | static void wav_teardown(pcm_reader_t **reader) |
48e2f01c | 72 | { |
73 | free(*reader); | |
74 | *reader = 0; | |
75 | } | |
76 | ||
77 | static | |
78 | int riff_read(wav_reader_t *reader, void *buffer, uint32_t size) | |
79 | { | |
80 | int rc; | |
81 | uint32_t count = 0; | |
82 | ||
83 | if (reader->last_error) | |
84 | return -1; | |
85 | do { | |
86 | rc = reader->io.read(reader->io_cookie, buffer, size - count); | |
87 | if (rc > 0) | |
88 | count += rc; | |
89 | else if (rc < 0) | |
90 | reader->last_error = WAV_IO_ERROR; | |
91 | } while (rc > 0 && count < size); | |
92 | return count > 0 ? count : rc; | |
93 | } | |
94 | ||
95 | static | |
68543176 | 96 | int riff_skip(wav_reader_t *reader, int64_t count) |
48e2f01c | 97 | { |
98 | char buff[8192]; | |
99 | int rc; | |
100 | ||
101 | if (reader->last_error) | |
102 | return -1; | |
103 | if (count == 0) | |
104 | return 0; | |
105 | if (reader->io.seek && | |
106 | reader->io.seek(reader->io_cookie, count, SEEK_CUR) >= 0) | |
107 | return 0; | |
108 | ||
109 | do { | |
110 | if ((rc = riff_read(reader, buff, count > 8192 ? 8192 : count)) > 0) | |
111 | count -= rc; | |
112 | } while (rc > 0 && count > 0); | |
113 | ||
114 | if (count > 0) | |
115 | reader->last_error = WAV_IO_ERROR; | |
116 | return reader->last_error ? -1 : 0; | |
117 | } | |
118 | ||
68543176 | 119 | static |
120 | int riff_seek(wav_reader_t *reader, int64_t off, int whence) | |
121 | { | |
122 | int rc; | |
123 | if (reader->last_error) | |
124 | return -1; | |
125 | if (!reader->io.seek) | |
126 | goto FAIL; | |
127 | if ((rc = reader->io.seek(reader->io_cookie, off, whence)) < 0) | |
128 | goto FAIL; | |
129 | return 0; | |
130 | FAIL: | |
131 | reader->last_error = WAV_IO_ERROR; | |
132 | return -1; | |
133 | } | |
134 | ||
135 | static | |
136 | int64_t riff_tell(wav_reader_t *reader) | |
137 | { | |
138 | int64_t off; | |
139 | ||
140 | if (reader->last_error || !reader->io.tell) | |
141 | return -1; | |
142 | off = reader->io.tell(reader->io_cookie); | |
143 | if (off < 0) { | |
144 | reader->last_error = WAV_IO_ERROR; | |
145 | return -1; | |
146 | } | |
147 | return off; | |
148 | } | |
149 | ||
48e2f01c | 150 | static |
151 | int riff_read16(wav_reader_t *reader, uint16_t *value) | |
152 | { | |
153 | TRY_IO(riff_read(reader, value, 2) != 2); | |
154 | *value = m4af_ltoh16(*value); | |
155 | return 0; | |
156 | FAIL: | |
157 | return -1; | |
158 | } | |
159 | ||
160 | static | |
161 | int riff_read32(wav_reader_t *reader, uint32_t *value) | |
162 | { | |
163 | TRY_IO(riff_read(reader, value, 4) != 4); | |
164 | *value = m4af_ltoh32(*value); | |
165 | return 0; | |
166 | FAIL: | |
167 | return -1; | |
168 | } | |
169 | ||
170 | static | |
171 | int riff_read64(wav_reader_t *reader, uint64_t *value) | |
172 | { | |
173 | TRY_IO(riff_read(reader, value, 8) != 8); | |
174 | *value = m4af_ltoh64(*value); | |
175 | return 0; | |
176 | FAIL: | |
177 | return -1; | |
178 | } | |
179 | ||
180 | static | |
181 | int riff_scan(wav_reader_t *reader, const char *fmt, ...) | |
182 | { | |
183 | int c, count = 0; | |
184 | va_list ap; | |
185 | ||
186 | va_start(ap, fmt); | |
187 | while ((c = *fmt++)) { | |
188 | switch (c) { | |
189 | case 'S': | |
190 | TRY_IO(riff_read16(reader, va_arg(ap, uint16_t*))); | |
191 | ++count; | |
192 | break; | |
193 | case 'L': | |
194 | TRY_IO(riff_read32(reader, va_arg(ap, uint32_t*))); | |
195 | ++count; | |
196 | break; | |
197 | case 'Q': | |
198 | TRY_IO(riff_read64(reader, va_arg(ap, uint64_t*))); | |
199 | ++count; | |
200 | break; | |
201 | } | |
202 | } | |
203 | FAIL: | |
204 | va_end(ap); | |
205 | return count; | |
206 | } | |
207 | ||
208 | static | |
209 | uint32_t riff_next_chunk(wav_reader_t *reader, uint32_t *chunk_size) | |
210 | { | |
211 | uint32_t fcc; | |
212 | if (riff_scan(reader, "LL", &fcc, chunk_size) == 2) | |
213 | return fcc; | |
214 | return 0; | |
215 | } | |
216 | ||
2d744bd5 | 217 | static |
218 | int wav_read_frames(pcm_reader_t *preader, void *buffer, unsigned nframes) | |
48e2f01c | 219 | { |
220 | int rc; | |
221 | unsigned nbytes; | |
2d744bd5 | 222 | wav_reader_t *reader = (wav_reader_t *)preader; |
48e2f01c | 223 | |
224 | if (!reader->ignore_length && nframes > reader->length - reader->position) | |
225 | nframes = reader->length - reader->position; | |
226 | nbytes = nframes * reader->sample_format.bytes_per_frame; | |
227 | if (nbytes) { | |
228 | if ((rc = riff_read(reader, buffer, nbytes)) < 0) | |
229 | return -1; | |
230 | nframes = rc / reader->sample_format.bytes_per_frame; | |
231 | reader->position += nframes; | |
232 | } | |
233 | return nframes; | |
234 | } | |
235 | ||
236 | static | |
237 | int riff_ds64(wav_reader_t *reader, int64_t *length) | |
238 | { | |
239 | uint32_t fcc, chunk_size, table_size; | |
240 | uint64_t riff_size, sample_count; | |
241 | ||
242 | fcc = riff_next_chunk(reader, &chunk_size); | |
243 | ASSERT_FORMAT(reader, | |
244 | fcc == RIFF_FOURCC('d','s','6','4') && chunk_size >= 28); | |
245 | TRY_IO(riff_scan(reader, "QQQL", | |
246 | &riff_size, length, &sample_count, &table_size) != 4); | |
68879398 | 247 | TRY_IO(riff_skip(reader, (chunk_size - 27) & ~1)); |
248 | reader->data_offset += (chunk_size + 9) & ~1; | |
48e2f01c | 249 | FAIL: |
250 | return -1; | |
251 | } | |
252 | ||
253 | static | |
254 | int wav_fmt(wav_reader_t *reader, uint32_t size) | |
255 | { | |
256 | uint16_t wFormatTag, nChannels, nBlockAlign, wBitsPerSample, cbSize; | |
257 | uint32_t nSamplesPerSec, nAvgBytesPerSec, dwChannelMask = 0; | |
258 | uint16_t wValidBitsPerSample; | |
259 | uint8_t guid[16]; | |
260 | int is_float = 0; | |
261 | ||
262 | ASSERT_FORMAT(reader, size >= 16); | |
263 | TRY_IO(riff_scan(reader, "SSLLSS", &wFormatTag, &nChannels, | |
264 | &nSamplesPerSec, &nAvgBytesPerSec, &nBlockAlign, | |
265 | &wBitsPerSample) != 6); | |
266 | wValidBitsPerSample = wBitsPerSample; | |
267 | ||
268 | if (wFormatTag != 1 && wFormatTag != 3 && wFormatTag != 0xfffe) { | |
269 | reader->last_error = WAV_UNSUPPORTED_FORMAT; | |
270 | goto FAIL; | |
271 | } | |
272 | ASSERT_FORMAT(reader, | |
273 | nChannels && nSamplesPerSec && nAvgBytesPerSec && | |
274 | nBlockAlign && wBitsPerSample && !(wBitsPerSample & 7) && | |
275 | nBlockAlign == nChannels * wBitsPerSample / 8); | |
276 | if (wFormatTag == 3) | |
277 | is_float = 1; | |
278 | ||
279 | if (wFormatTag != 0xfffe) | |
280 | TRY_IO(riff_skip(reader, (size - 15) & ~1)); | |
281 | else { | |
282 | ASSERT_FORMAT(reader, size >= 40); | |
283 | TRY_IO(riff_scan(reader, "SSL", | |
284 | &cbSize, &wValidBitsPerSample, &dwChannelMask) != 3); | |
285 | TRY_IO(riff_read(reader, guid, 16) != 16); | |
286 | ||
287 | if (memcmp(guid, WAV_GUID_FLOAT, 16) == 0) | |
288 | is_float = 1; | |
289 | else if (memcmp(guid, WAV_GUID_PCM, 16) != 0) { | |
290 | reader->last_error = WAV_UNSUPPORTED_FORMAT; | |
291 | goto FAIL; | |
292 | } | |
293 | ASSERT_FORMAT(reader, | |
294 | wValidBitsPerSample && | |
295 | wValidBitsPerSample <= wBitsPerSample); | |
296 | TRY_IO(riff_skip(reader, (size - 39) & ~1)); | |
297 | } | |
298 | reader->sample_format.sample_rate = nSamplesPerSec; | |
299 | reader->sample_format.bits_per_channel = wValidBitsPerSample; | |
300 | reader->sample_format.bytes_per_frame = nBlockAlign; | |
301 | reader->sample_format.channels_per_frame = nChannels; | |
302 | reader->sample_format.channel_mask = dwChannelMask; | |
303 | if (is_float) | |
304 | reader->sample_format.sample_type = PCM_TYPE_FLOAT; | |
305 | else if (wBitsPerSample == 8) | |
306 | reader->sample_format.sample_type = PCM_TYPE_UINT; | |
307 | else | |
308 | reader->sample_format.sample_type = PCM_TYPE_SINT; | |
309 | return 0; | |
310 | FAIL: | |
311 | return -1; | |
312 | } | |
313 | ||
314 | static | |
315 | int wav_parse(wav_reader_t *reader, int64_t *data_length) | |
316 | { | |
317 | uint32_t container, fcc, chunk_size; | |
318 | ||
319 | *data_length = 0; | |
320 | container = riff_next_chunk(reader, &chunk_size); | |
321 | if (container != RIFF_FOURCC('R','I','F','F') && | |
322 | container != RIFF_FOURCC('R','F','6','4')) | |
323 | goto FAIL; | |
324 | TRY_IO(riff_read32(reader, &fcc)); | |
325 | if (fcc != RIFF_FOURCC('W','A','V','E')) | |
326 | goto FAIL; | |
68879398 | 327 | reader->data_offset = 12; |
328 | ||
48e2f01c | 329 | if (container == RIFF_FOURCC('R','F','6','4')) |
330 | riff_ds64(reader, data_length); | |
331 | while ((fcc = riff_next_chunk(reader, &chunk_size)) != 0) { | |
332 | if (fcc == RIFF_FOURCC('f','m','t',' ')) { | |
333 | if (wav_fmt(reader, chunk_size) < 0) | |
334 | goto FAIL; | |
335 | } else if (fcc == RIFF_FOURCC('d','a','t','a')) { | |
336 | if (container == RIFF_FOURCC('R','I','F','F')) | |
337 | *data_length = chunk_size; | |
68879398 | 338 | reader->data_offset += 8; |
48e2f01c | 339 | break; |
68879398 | 340 | } else { |
48e2f01c | 341 | TRY_IO(riff_skip(reader, (chunk_size + 1) & ~1)); |
68879398 | 342 | } |
343 | reader->data_offset += (chunk_size + 9) & ~1; | |
48e2f01c | 344 | } |
345 | if (fcc == RIFF_FOURCC('d','a','t','a')) | |
346 | return 0; | |
347 | FAIL: | |
348 | return -1; | |
349 | } | |
350 | ||
2d744bd5 | 351 | static pcm_reader_vtbl_t wav_vtable = { |
352 | wav_get_format, | |
353 | wav_get_length, | |
354 | wav_get_position, | |
355 | wav_read_frames, | |
356 | wav_teardown | |
357 | }; | |
358 | ||
359 | pcm_reader_t *wav_open(wav_io_context_t *io_ctx, void *io_cookie, | |
48e2f01c | 360 | int ignore_length) |
361 | { | |
68879398 | 362 | wav_reader_t *reader = 0; |
48e2f01c | 363 | int64_t data_length; |
68879398 | 364 | unsigned bpf; |
48e2f01c | 365 | |
366 | if ((reader = calloc(1, sizeof(wav_reader_t))) == 0) | |
367 | return 0; | |
368 | memcpy(&reader->io, io_ctx, sizeof(wav_io_context_t)); | |
369 | reader->io_cookie = io_cookie; | |
370 | reader->ignore_length = ignore_length; | |
371 | if (wav_parse(reader, &data_length) < 0) { | |
372 | free(reader); | |
373 | return 0; | |
374 | } | |
68879398 | 375 | bpf = reader->sample_format.bytes_per_frame; |
376 | if (ignore_length || !data_length || data_length % bpf) | |
48e2f01c | 377 | reader->length = INT64_MAX; |
378 | else | |
68879398 | 379 | reader->length = data_length / bpf; |
380 | ||
381 | if (reader->length == INT64_MAX && reader->io.seek && reader->io.tell) { | |
382 | if (reader->io.seek(reader->io_cookie, 0, SEEK_END) >= 0) { | |
383 | int64_t size = reader->io.tell(reader->io_cookie); | |
384 | if (size > 0) | |
385 | reader->length = (size - reader->data_offset) / bpf; | |
386 | reader->io.seek(reader->io_cookie, reader->data_offset, SEEK_SET); | |
387 | } | |
388 | } | |
2d744bd5 | 389 | reader->vtbl = &wav_vtable; |
390 | return (pcm_reader_t *)reader; | |
48e2f01c | 391 | } |
68543176 | 392 | |
2d744bd5 | 393 | pcm_reader_t *raw_open(wav_io_context_t *io_ctx, void *io_cookie, |
68543176 | 394 | const pcm_sample_description_t *desc) |
395 | { | |
396 | wav_reader_t *reader = 0; | |
397 | ||
398 | if ((reader = calloc(1, sizeof(wav_reader_t))) == 0) | |
399 | return 0; | |
400 | memcpy(&reader->io, io_ctx, sizeof(wav_io_context_t)); | |
401 | memcpy(&reader->sample_format, desc, sizeof(pcm_sample_description_t)); | |
402 | reader->io_cookie = io_cookie; | |
403 | if (io_ctx->seek && io_ctx->tell) { | |
68879398 | 404 | if (reader->io.seek(reader->io_cookie, 0, SEEK_END) >= 0) { |
405 | int64_t size = reader->io.tell(reader->io_cookie); | |
406 | if (size > 0) | |
407 | reader->length = size / desc->bytes_per_frame; | |
408 | reader->io.seek(reader->io_cookie, reader->data_offset, SEEK_SET); | |
409 | } | |
68543176 | 410 | } else |
411 | reader->length = INT64_MAX; | |
2d744bd5 | 412 | reader->vtbl = &wav_vtable; |
413 | return (pcm_reader_t *)reader; | |
68543176 | 414 | } |
415 | ||
416 |