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
|
/* Copyright: © Copyright 2005 Apple Computer, Inc. All rights reserved.
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, 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 AppleÕs
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 Computer, 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.
*/
/*=============================================================================
AUOutputBL.h
=============================================================================*/
#include "AUOutputBL.h"
/*
struct AudioBufferList
{
UInt32 mNumberBuffers;
AudioBuffer mBuffers[1];
};
struct AudioBuffer
{
UInt32 mNumberChannels; // number of interleaved channels in the buffer
UInt32 mDataByteSize; // the size of the buffer pointed to by mData
void* mData; // the pointer to the buffer
};
*/
AUOutputBL::AUOutputBL (const CAStreamBasicDescription &inDesc, UInt32 inDefaultNumFrames)
: mFormat (inDesc),
mBufferMemory(NULL),
mBufferList (NULL),
mNumberBuffers (0), // keep this here, so can ensure integrity of ABL
mBufferSize (0),
mFrames(inDefaultNumFrames)
{
mNumberBuffers = mFormat.IsInterleaved() ? 1 : mFormat.NumberChannels();
mBufferList = reinterpret_cast<AudioBufferList*>(new Byte[sizeof(UInt32) + (mNumberBuffers * sizeof(AudioBuffer))]);
}
AUOutputBL::~AUOutputBL()
{
if (mBufferMemory)
delete[] mBufferMemory;
if (mBufferList)
delete [] mBufferList;
}
void AUOutputBL::Prepare (UInt32 inNumFrames, bool inWantNullBufferIfAllocated)
{
UInt32 channelsPerBuffer = mFormat.IsInterleaved() ? mFormat.NumberChannels() : 1;
if (mBufferMemory == NULL || inWantNullBufferIfAllocated)
{
mBufferList->mNumberBuffers = mNumberBuffers;
AudioBuffer *buf = &mBufferList->mBuffers[0];
for (UInt32 i = 0; i < mNumberBuffers; ++i, ++buf) {
buf->mNumberChannels = channelsPerBuffer;
buf->mDataByteSize = mFormat.FramesToBytes (inNumFrames);
buf->mData = NULL;
}
}
else
{
UInt32 nBytes = mFormat.FramesToBytes (inNumFrames);
if ((nBytes * mNumberBuffers) > AllocatedBytes())
throw OSStatus(-10874);//(kAudioUnitErr_TooManyFramesToProcess);
mBufferList->mNumberBuffers = mNumberBuffers;
AudioBuffer *buf = &mBufferList->mBuffers[0];
Byte* p = mBufferMemory;
for (UInt32 i = 0; i < mNumberBuffers; ++i, ++buf) {
buf->mNumberChannels = channelsPerBuffer;
buf->mDataByteSize = nBytes;
buf->mData = p;
p += mBufferSize;
}
}
}
void AUOutputBL::Allocate (UInt32 inNumFrames)
{
if (inNumFrames)
{
UInt32 nBytes = mFormat.FramesToBytes (inNumFrames);
if (nBytes <= AllocatedBytes())
return;
// align successive buffers for Altivec and to take alternating
// cache line hits by spacing them by odd multiples of 16
if (mNumberBuffers > 1)
nBytes = (nBytes + (0x10 - (nBytes & 0xF))) | 0x10;
mBufferSize = nBytes;
UInt32 memorySize = mBufferSize * mNumberBuffers;
Byte *newMemory = new Byte[memorySize];
memset(newMemory, 0, memorySize); // make buffer "hot"
Byte *oldMemory = mBufferMemory;
mBufferMemory = newMemory;
delete[] oldMemory;
mFrames = inNumFrames;
}
else
{
if (mBufferMemory) {
delete [] mBufferMemory;
mBufferMemory = NULL;
}
mBufferSize = 0;
mFrames = 0;
}
}
#if DEBUG
void AUOutputBL::Print()
{
printf ("AUOutputBL::Print\n");
mFormat.Print();
printf ("Num Buffers:%ld, mFrames:%ld, allocatedMemory:%c\n", mBufferList->mNumberBuffers, mFrames, (mBufferMemory != NULL ? 'T' : 'F'));
AudioBuffer *buf = &mBufferList->mBuffers[0];
for (UInt32 i = 0; i < mBufferList->mNumberBuffers; ++i, ++buf)
printf ("\tBuffer:%ld, Size:%ld, Chans:%ld, Buffer:%X\n", i, buf->mDataByteSize, buf->mNumberChannels, int(buf->mData));
}
#endif
|
