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
|
/*
File: CAStreamRangedDescription.cpp
Abstract: CAStreamRangedDescription.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.
*/
//==================================================================================================
// Includes
//==================================================================================================
// Self Include
#include "CAStreamRangedDescription.h"
#include "CAMath.h"
//==================================================================================================
// CAStreamRangedDescription
//==================================================================================================
const AudioStreamRangedDescription CAStreamRangedDescription::sEmpty = { { 0.0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0.0, 0.0 } };
#if CoreAudio_Debug
#include "CALogMacros.h"
void CAStreamRangedDescription::PrintToLog(const AudioStreamRangedDescription& inDesc)
{
PrintFloat (" Sample Rate: ", inDesc.mFormat.mSampleRate);
PrintFloat (" Max Sample Rate: ", inDesc.mSampleRateRange.mMaximum);
PrintFloat (" Min Sample Rate: ", inDesc.mSampleRateRange.mMinimum);
Print4CharCode (" Format ID: ", inDesc.mFormat.mFormatID);
PrintHex (" Format Flags: ", inDesc.mFormat.mFormatFlags);
PrintInt (" Bytes per Packet: ", inDesc.mFormat.mBytesPerPacket);
PrintInt (" Frames per Packet: ", inDesc.mFormat.mFramesPerPacket);
PrintInt (" Bytes per Frame: ", inDesc.mFormat.mBytesPerFrame);
PrintInt (" Channels per Frame: ", inDesc.mFormat.mChannelsPerFrame);
PrintInt (" Bits per Channel: ", inDesc.mFormat.mBitsPerChannel);
}
#endif
bool CAStreamRangedDescription::Sorter(const AudioStreamRangedDescription& x, const AudioStreamRangedDescription& y)
{
bool theAnswer = false;
bool isDone = false;
// note that if either side is 0, that field is skipped
// format ID is the first order sort
if((!isDone) && ((x.mFormat.mFormatID != 0) && (y.mFormat.mFormatID != 0)))
{
if(x.mFormat.mFormatID != y.mFormat.mFormatID)
{
// formats are sorted numerically except that linear
// PCM is always first
if(x.mFormat.mFormatID == kAudioFormatLinearPCM)
{
theAnswer = true;
}
else if(y.mFormat.mFormatID == kAudioFormatLinearPCM)
{
theAnswer = false;
}
else
{
theAnswer = x.mFormat.mFormatID < y.mFormat.mFormatID;
}
isDone = true;
}
}
// mixable is always better than non-mixable for linear PCM and should be the second order sort item
if((!isDone) && ((x.mFormat.mFormatID == kAudioFormatLinearPCM) && (y.mFormat.mFormatID == kAudioFormatLinearPCM)))
{
if(((x.mFormat.mFormatFlags & kIsNonMixableFlag) == 0) && ((y.mFormat.mFormatFlags & kIsNonMixableFlag) != 0))
{
theAnswer = true;
isDone = true;
}
else if(((x.mFormat.mFormatFlags & kIsNonMixableFlag) != 0) && ((y.mFormat.mFormatFlags & kIsNonMixableFlag) == 0))
{
theAnswer = false;
isDone = true;
}
}
// floating point vs integer for linear PCM only
if((!isDone) && ((x.mFormat.mFormatID == kAudioFormatLinearPCM) && (y.mFormat.mFormatID == kAudioFormatLinearPCM)))
{
if((x.mFormat.mFormatFlags & kAudioFormatFlagIsFloat) != (y.mFormat.mFormatFlags & kAudioFormatFlagIsFloat))
{
// floating point is better than integer
theAnswer = y.mFormat.mFormatFlags & kAudioFormatFlagIsFloat;
isDone = true;
}
}
// bit depth
if((!isDone) && ((x.mFormat.mBitsPerChannel != 0) && (y.mFormat.mBitsPerChannel != 0)))
{
if(x.mFormat.mBitsPerChannel != y.mFormat.mBitsPerChannel)
{
// deeper bit depths are higher quality
theAnswer = x.mFormat.mBitsPerChannel > y.mFormat.mBitsPerChannel;
isDone = true;
}
}
// sample rate range
if((!isDone) && fnonzero(x.mSampleRateRange.mMinimum) && fnonzero(x.mSampleRateRange.mMaximum) && fnonzero(y.mSampleRateRange.mMinimum) && fnonzero(y.mSampleRateRange.mMaximum))
{
if(x.mSampleRateRange != y.mSampleRateRange)
{
// higher sample rates are higher quality
theAnswer = x.mSampleRateRange > y.mSampleRateRange;
isDone = true;
}
}
// sample rate
if((!isDone) && fnonzero(x.mFormat.mSampleRate) && fnonzero(y.mFormat.mSampleRate))
{
if(fnotequal(x.mFormat.mSampleRate, y.mFormat.mSampleRate))
{
// higher sample rates are higher quality
theAnswer = x.mFormat.mSampleRate > y.mFormat.mSampleRate;
isDone = true;
}
}
// number of channels
if((!isDone) && ((x.mFormat.mChannelsPerFrame != 0) && (y.mFormat.mChannelsPerFrame != 0)))
{
if(x.mFormat.mChannelsPerFrame != y.mFormat.mChannelsPerFrame)
{
// more channels is higher quality
theAnswer = x.mFormat.mChannelsPerFrame < y.mFormat.mChannelsPerFrame;
// commented out to prevent this from being flagged as a dead store by the static analyzer
//isDone = true;
}
}
return theAnswer;
}
|
