1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
|
/*
File: CAAudioFileFormats.cpp
Abstract: CAAudioFileFormats.h
Version: 1.1
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc. may
be used to endorse or promote products derived from the Apple Software
without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2014 Apple Inc. All Rights Reserved.
*/
#include "CAAudioFileFormats.h"
#include <algorithm>
#include <ctype.h>
CAAudioFileFormats *CAAudioFileFormats::sInstance = NULL;
CAAudioFileFormats *CAAudioFileFormats::Instance(bool loadDataFormats)
{
if (sInstance == NULL)
sInstance = new CAAudioFileFormats(loadDataFormats);
return sInstance;
}
/*
class CompareFileFormatNames {
public:
bool operator() (const CAAudioFileFormats::FileFormatInfo &a, const CAAudioFileFormats::FileFormatInfo &b)
{
return CFStringCompare(a.mFileTypeName, b.mFileTypeName,
kCFCompareCaseInsensitive | kCFCompareLocalized) == kCFCompareLessThan;
}
};*/
static int CompareFileFormatNames(const void *va, const void *vb)
{
CAAudioFileFormats::FileFormatInfo *a = (CAAudioFileFormats::FileFormatInfo *)va,
*b = (CAAudioFileFormats::FileFormatInfo *)vb;
return CFStringCompare(a->mFileTypeName, b->mFileTypeName,
kCFCompareCaseInsensitive | kCFCompareLocalized);
}
CAAudioFileFormats::CAAudioFileFormats(bool loadDataFormats) :
mNumFileFormats(0), mFileFormats(NULL)
{
OSStatus err;
UInt32 size;
UInt32 *fileTypes = NULL;
// get all file types
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_WritableTypes, 0, NULL, &size);
if (err != noErr) goto bail;
mNumFileFormats = size / sizeof(UInt32);
mFileFormats = new FileFormatInfo[mNumFileFormats];
fileTypes = new UInt32[mNumFileFormats];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_WritableTypes, 0, NULL, &size, fileTypes);
if (err != noErr) goto bail;
// get info for each file type
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
OSType filetype = fileTypes[i];
ffi->mFileTypeID = filetype;
// file type name
ffi->mFileTypeName = NULL;
size = sizeof(CFStringRef);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_FileTypeName, sizeof(UInt32), &filetype, &size, &ffi->mFileTypeName);
if (err == noErr && ffi->mFileTypeName)
CFRetain(ffi->mFileTypeName);
// file extensions
size = sizeof(CFArrayRef);
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_ExtensionsForType,
sizeof(OSType), &filetype, &size, &ffi->mExtensions);
if (err)
ffi->mExtensions = NULL;
// file data formats
ffi->mNumDataFormats = 0;
ffi->mDataFormats = NULL;
if (loadDataFormats)
ffi->LoadDataFormats();
}
// sort file formats by name
qsort(mFileFormats, mNumFileFormats, sizeof(FileFormatInfo), CompareFileFormatNames);
bail:
delete[] fileTypes;
}
void CAAudioFileFormats::FileFormatInfo::LoadDataFormats()
{
if (mDataFormats != NULL) return;
UInt32 *writableFormats = NULL, *readableFormats = NULL;
int nWritableFormats, nReadableFormats;
// get all writable formats
UInt32 size;
OSStatus err = AudioFormatGetPropertyInfo(kAudioFormatProperty_EncodeFormatIDs, 0, NULL, &size);
if (err != noErr) goto bail;
nWritableFormats = size / sizeof(UInt32);
writableFormats = new UInt32[nWritableFormats];
err = AudioFormatGetProperty(kAudioFormatProperty_EncodeFormatIDs, 0, NULL, &size, writableFormats);
if (err != noErr) goto bail;
// get all readable formats
err = AudioFormatGetPropertyInfo(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size);
if (err != noErr) goto bail;
nReadableFormats = size / sizeof(UInt32);
readableFormats = new UInt32[nReadableFormats];
err = AudioFormatGetProperty(kAudioFormatProperty_DecodeFormatIDs, 0, NULL, &size, readableFormats);
if (err != noErr) goto bail;
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableFormatIDs, sizeof(UInt32), &mFileTypeID, &size);
if (err == noErr) {
mNumDataFormats = size / sizeof(OSType);
OSType *formatIDs = new OSType[mNumDataFormats];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableFormatIDs,
sizeof(UInt32), &mFileTypeID, &size, formatIDs);
if (err == noErr) {
mDataFormats = new DataFormatInfo[mNumDataFormats];
for (int j = 0; j < mNumDataFormats; ++j) {
int k;
bool anyBigEndian = false, anyLittleEndian = false;
DataFormatInfo *dfi = &mDataFormats[j];
dfi->mFormatID = formatIDs[j];
dfi->mReadable = (dfi->mFormatID == kAudioFormatLinearPCM);
dfi->mWritable = (dfi->mFormatID == kAudioFormatLinearPCM);
for (k = 0; k < nReadableFormats; ++k)
if (readableFormats[k] == dfi->mFormatID) {
dfi->mReadable = true;
break;
}
for (k = 0; k < nWritableFormats; ++k)
if (writableFormats[k] == dfi->mFormatID) {
dfi->mWritable = true;
break;
}
dfi->mNumVariants = 0;
AudioFileTypeAndFormatID tf = { mFileTypeID, dfi->mFormatID };
err = AudioFileGetGlobalInfoSize(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat,
sizeof(AudioFileTypeAndFormatID), &tf, &size);
if (err == noErr) {
dfi->mNumVariants = size / sizeof(AudioStreamBasicDescription);
dfi->mVariants = new AudioStreamBasicDescription[dfi->mNumVariants];
err = AudioFileGetGlobalInfo(kAudioFileGlobalInfo_AvailableStreamDescriptionsForFormat,
sizeof(AudioFileTypeAndFormatID), &tf, &size, dfi->mVariants);
if (err) {
dfi->mNumVariants = 0;
delete[] dfi->mVariants;
dfi->mVariants = NULL;
} else {
for (k = 0; k < dfi->mNumVariants; ++k) {
AudioStreamBasicDescription *desc = &dfi->mVariants[k];
if (desc->mBitsPerChannel > 8) {
if (desc->mFormatFlags & kAudioFormatFlagIsBigEndian)
anyBigEndian = true;
else
anyLittleEndian = true;
}
}
}
}
dfi->mEitherEndianPCM = (anyBigEndian && anyLittleEndian);
}
}
delete[] formatIDs;
}
bail:
delete[] readableFormats;
delete[] writableFormats;
}
// note that the outgoing format will have zero for the sample rate, channels per frame, bytesPerPacket, bytesPerFrame
bool CAAudioFileFormats::InferDataFormatFromFileFormat(AudioFileTypeID filetype, CAStreamBasicDescription &fmt)
{
// if the file format only supports one data format
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
ffi->LoadDataFormats();
if (ffi->mFileTypeID == filetype && ffi->mNumDataFormats > 0) {
DataFormatInfo *dfi = &ffi->mDataFormats[0];
if (ffi->mNumDataFormats > 1) {
// file can contain multiple data formats. Take PCM if it's there.
for (int j = 0; j < ffi->mNumDataFormats; ++j) {
if (ffi->mDataFormats[j].mFormatID == kAudioFormatLinearPCM) {
dfi = &ffi->mDataFormats[j];
break;
}
}
}
memset(&fmt, 0, sizeof(fmt));
fmt.mFormatID = dfi->mFormatID;
if (dfi->mNumVariants > 0) {
// take the first variant as a default
fmt = dfi->mVariants[0];
if (dfi->mNumVariants > 1 && dfi->mFormatID == kAudioFormatLinearPCM) {
// look for a 16-bit variant as a better default
for (int j = 0; j < dfi->mNumVariants; ++j) {
AudioStreamBasicDescription *desc = &dfi->mVariants[j];
if (desc->mBitsPerChannel == 16) {
fmt = *desc;
break;
}
}
}
}
return true;
}
}
return false;
}
bool CAAudioFileFormats::InferFileFormatFromFilename(CFStringRef filename, AudioFileTypeID &filetype)
{
bool result = false;
CFRange range = CFStringFind(filename, CFSTR("."), kCFCompareBackwards);
if (range.location == kCFNotFound) return false;
range.location += 1;
range.length = CFStringGetLength(filename) - range.location;
CFStringRef ext = CFStringCreateWithSubstring(NULL, filename, range);
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
if (ffi->MatchExtension(ext)) {
filetype = ffi->mFileTypeID;
result = true;
break;
}
}
CFRelease(ext);
return result;
}
bool CAAudioFileFormats::InferFileFormatFromFilename(const char *filename, AudioFileTypeID &filetype)
{
if (filename == NULL) return false;
CFStringRef cfname = CFStringCreateWithCString(NULL, filename, kCFStringEncodingUTF8);
bool result = InferFileFormatFromFilename(cfname, filetype);
CFRelease(cfname);
return result;
}
bool CAAudioFileFormats::InferFileFormatFromDataFormat(const CAStreamBasicDescription &fmt,
AudioFileTypeID &filetype)
{
// if there's exactly one file format that supports this data format
FileFormatInfo *theFileFormat = NULL;
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
ffi->LoadDataFormats();
DataFormatInfo *dfi = ffi->mDataFormats, *dfiend = dfi + ffi->mNumDataFormats;
for ( ; dfi < dfiend; ++dfi)
if (dfi->mFormatID == fmt.mFormatID) {
if (theFileFormat != NULL)
return false; // ambiguous
theFileFormat = ffi; // got a candidate
}
}
if (theFileFormat == NULL)
return false;
filetype = theFileFormat->mFileTypeID;
return true;
}
bool CAAudioFileFormats::IsKnownDataFormat(OSType dataFormat)
{
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
ffi->LoadDataFormats();
DataFormatInfo *dfi = ffi->mDataFormats, *dfiend = dfi + ffi->mNumDataFormats;
for ( ; dfi < dfiend; ++dfi)
if (dfi->mFormatID == dataFormat)
return true;
}
return false;
}
CAAudioFileFormats::FileFormatInfo * CAAudioFileFormats::FindFileFormat(UInt32 formatID)
{
for (int i = 0; i < mNumFileFormats; ++i) {
FileFormatInfo *ffi = &mFileFormats[i];
if (ffi->mFileTypeID == formatID)
return ffi;
}
return NULL;
}
bool CAAudioFileFormats::FileFormatInfo::AnyWritableFormats()
{
LoadDataFormats();
DataFormatInfo *dfi = mDataFormats, *dfiend = dfi + mNumDataFormats;
for ( ; dfi < dfiend; ++dfi)
if (dfi->mWritable)
return true;
return false;
}
char *OSTypeToStr(char *buf, size_t bufsize, OSType t)
{
if (bufsize > 0) {
char *p = buf, *pend = buf + bufsize;
char str[4] = {0}, *q = str;
*(UInt32 *)str = CFSwapInt32HostToBig(t);
for (int i = 0; i < 4 && p < pend; ++i) {
if (isprint(*q) && *q != '\\')
*p++ = *q++;
else {
snprintf(p, pend - p, "\\x%02x", *q++);
p += 4;
}
}
if (p >= pend) p = pend - 1;
*p = '\0';
}
return buf;
}
int StrToOSType(const char *str, OSType &t)
{
char buf[4];
const char *p = str;
int x;
for (int i = 0; i < 4; ++i) {
if (*p != '\\') {
if ((buf[i] = *p++) == '\0') {
// special-case for 'aac ': if we only got three characters, assume the last was a space
if (i == 3) {
--p;
buf[i] = ' ';
break;
}
goto fail;
}
} else {
if (*++p != 'x') goto fail;
if (sscanf(++p, "%02X", &x) != 1) goto fail;
buf[i] = x;
p += 2;
}
}
t = CFSwapInt32BigToHost(*(UInt32 *)buf);
return static_cast<int>(p - str);
fail:
return 0;
}
#if DEBUG
void CAAudioFileFormats::DebugPrint()
{
for (int i = 0; i < mNumFileFormats; ++i)
mFileFormats[i].DebugPrint();
}
void CAAudioFileFormats::FileFormatInfo::DebugPrint()
{
char ftype[20];
char ftypename[64];
CFStringGetCString(mFileTypeName, ftypename, sizeof(ftypename), kCFStringEncodingUTF8);
printf("File type: '%s' = %s\n Extensions:", OSTypeToStr(ftype, sizeof(ftype), mFileTypeID), ftypename);
int i, n = NumberOfExtensions();
for (i = 0; i < n; ++i) {
GetExtension(i, ftype, sizeof(ftype));
printf(" .%s", ftype);
}
LoadDataFormats();
printf("\n Formats:\n");
for (i = 0; i < mNumDataFormats; ++i)
mDataFormats[i].DebugPrint();
}
void CAAudioFileFormats::DataFormatInfo::DebugPrint()
{
char buf[20];
static const char *ny[] = { "not ", "" };
printf(" '%s': %sreadable %swritable\n", OSTypeToStr(buf, sizeof(buf), mFormatID), ny[mReadable], ny[mWritable]);
for (int i = 0; i < mNumVariants; ++i) {
CAStreamBasicDescription desc(mVariants[i]);
desc.PrintFormat(stdout, " ", "");
//printf(" %d bytes/frame\n", desc.mBytesPerFrame);
}
}
#endif
|