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1/* Copyright: � Copyright 2005 Apple Computer, Inc. All rights reserved.
2
3 Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
4 ("Apple") in consideration of your agreement to the following terms, and your
5 use, installation, modification or redistribution of this Apple software
6 constitutes acceptance of these terms. If you do not agree with these terms,
7 please do not use, install, modify or redistribute this Apple software.
8
9 In consideration of your agreement to abide by the following terms, and subject
10 to these terms, Apple grants you a personal, non-exclusive license, under Apple�s
11 copyrights in this original Apple software (the "Apple Software"), to use,
12 reproduce, modify and redistribute the Apple Software, with or without
13 modifications, in source and/or binary forms; provided that if you redistribute
14 the Apple Software in its entirety and without modifications, you must retain
15 this notice and the following text and disclaimers in all such redistributions of
16 the Apple Software. Neither the name, trademarks, service marks or logos of
17 Apple Computer, Inc. may be used to endorse or promote products derived from the
18 Apple Software without specific prior written permission from Apple. Except as
19 expressly stated in this notice, no other rights or licenses, express or implied,
20 are granted by Apple herein, including but not limited to any patent rights that
21 may be infringed by your derivative works or by other works in which the Apple
22 Software may be incorporated.
23
24 The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
25 WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
26 WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
28 COMBINATION WITH YOUR PRODUCTS.
29
30 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
31 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
32 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
34 OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
35 (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
36 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37*/
38/*=============================================================================
39 CAChannelMappingPlayer.cpp
40
41=============================================================================*/
42
43#include "CAChannelMappingPlayer.h"
44#include "CAXException.h"
45
46#if DEBUG
47 #define VERBOSE 1
48#endif
49
50CAChannelMappingPlayer::CAChannelMappingPlayer(int nBuffers, UInt32 bufferSizeFrames) :
51 CAAudioFilePlayer(nBuffers, bufferSizeFrames),
52 mMapper(NULL)
53{
54}
55
56CAChannelMappingPlayer::~CAChannelMappingPlayer()
57{
58 delete mMapper;
59}
60
61void CAChannelMappingPlayer::SetupChannelMapping()
62{
63 delete mMapper;
64 mMapper = NULL;
65
66 const CAStreamBasicDescription &fileFormat = GetFile().GetClientDataFormat();
67 CAStreamBasicDescription deviceFormat;
68 UInt32 propertySize = sizeof(AudioStreamBasicDescription);
69
70 XThrowIfError(AudioUnitGetProperty(
71 GetOutputUnit(),
72 kAudioUnitProperty_StreamFormat,
73 kAudioUnitScope_Output,
74 0,
75 (void *)&deviceFormat,
76 &propertySize), "get output device's format");
77
78#if VERBOSE
79 printf("CAChannelMappingPlayer::SetupChannelMapping: %ld-ch file, %ld-ch device\n",
80 fileFormat.mChannelsPerFrame, deviceFormat.mChannelsPerFrame);
81#endif
82
83 if (fileFormat.mChannelsPerFrame <= deviceFormat.mChannelsPerFrame) {
84 // no mapping needed, use output unit's default behavior
85 // (default stereo pair and speaker config from AMS)
86#if VERBOSE
87 printf(" using output unit's channel mapping\n");
88#endif
89 CAAudioFilePlayer::SetupChannelMapping();
90 } else {
91 // fewer device than file channels, mapping needed
92 CAAudioChannelLayout fileLayout, deviceLayout;
93
94#if VERBOSE
95 printf(" using our own channel mapping\n");
96#endif
97 deviceFormat.mSampleRate = fileFormat.mSampleRate;
98 deviceFormat.SetCanonical(deviceFormat.mChannelsPerFrame, false); // force deinterleaved
99
100 fileLayout = GetFile().GetFileChannelLayout();
101
102 UInt32 layoutSize;
103 Boolean writable;
104 OSStatus err = AudioUnitGetPropertyInfo(
105 GetOutputUnit(),
106 kAudioUnitProperty_AudioChannelLayout,
107 kAudioUnitScope_Input,
108 0,
109 &layoutSize,
110 &writable);
111 if (!err) {
112 char *buf = (char *)malloc(layoutSize);
113 err = AudioUnitGetProperty(
114 GetOutputUnit(),
115 kAudioUnitProperty_AudioChannelLayout,
116 kAudioUnitScope_Input,
117 0,
118 buf,
119 &layoutSize);
120 deviceLayout = CAAudioChannelLayout(reinterpret_cast<AudioChannelLayout *>(buf));
121 free(buf);
122 }
123 mMapper = new CAChannelMapper(fileFormat, deviceFormat, &fileLayout, &deviceLayout);
124
125 // give the output unit the same number of channels as in the device,
126 // since we'll be doing the mapping ourselves
127 XThrowIfError(AudioUnitSetProperty(
128 GetOutputUnit(),
129 kAudioUnitProperty_StreamFormat,
130 kAudioUnitScope_Input,
131 0,
132 (void *)&deviceFormat,
133 sizeof(AudioStreamBasicDescription)), "set audio output format");
134
135 XThrowIfError(mMapper->OpenMixer(fileFormat.mSampleRate), "open mixer");
136 XThrowIfError(mMapper->ConfigureDownmix(), "configure downmix");
137
138 AudioUnitConnection conn;
139 conn.sourceAudioUnit = mMapper->GetMixer();
140 conn.sourceOutputNumber = 0;
141 conn.destInputNumber = 0;
142
143 XThrowIfError(AudioUnitSetProperty(
144 GetOutputUnit(),
145 kAudioUnitProperty_MakeConnection,
146 kAudioUnitScope_Global,
147 0,
148 (void *)&conn,
149 sizeof(AudioUnitConnection)), "connect mixer to output unit");
150
151 AURenderCallbackStruct input;
152 input.inputProc = InputProc;
153 input.inputProcRefCon = this;
154 XThrowIfError(AudioUnitSetProperty(
155 conn.sourceAudioUnit,
156 kAudioUnitProperty_SetRenderCallback,
157 kAudioUnitScope_Global,
158 0,
159 &input,
160 sizeof(input)), "connect input proc to mixer");
161 // provide NO channel layout
162// mReadBuf = CABufferList::New("", fileFormat);
163// mReadBuf->AllocateBuffers(
164 }
165}