13
0
livetrax/libs/appleutility/CoreAudio/PublicUtility/CAAudioFileFormats.cpp

425 lines
14 KiB
C++
Raw Normal View History

/*
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