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comparison src/cdrom/macosx/AudioFilePlayer.h @ 613:9c6717a1c66f

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Added MacOS X CD-ROM audio support (thanks Max and Darrell)
author Sam Lantinga <slouken@libsdl.org>
date Tue, 15 Apr 2003 16:33:56 +0000
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children 1bd056de5d1b
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612:0648505b1f8b 613:9c6717a1c66f
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21
22 This file based on Apple sample code. We haven't changed the file name,
23 so if you want to see the original search for it on apple.com/developer
24 */
25
26 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 // AudioFilePlayer.h
28 //
29 #ifndef __AudioFilePlayer_H__
30 #define __AudioFilePlayer_H__
31
32 #include <CoreServices/CoreServices.h>
33
34 #include <AudioToolbox/AudioToolbox.h>
35 #include <AudioUnit/AudioUnit.h>
36
37 #include "SDL_Error.h"
38
39 const char* AudioFilePlayerErrorStr (OSStatus error);
40
41 void ThrowResult (OSStatus result, const char *str);
42
43 #define THROW_RESULT(str) \
44 if (result) { \
45 ThrowResult (result, str); \
46 }
47
48 typedef void (*AudioFilePlayNotifier)(void *inRefCon,
49 OSStatus inStatus);
50
51 enum {
52 kAudioFilePlayErr_FilePlayUnderrun = -10000,
53 kAudioFilePlay_FileIsFinished = -10001,
54 kAudioFilePlay_PlayerIsUninitialized = -10002
55 };
56
57
58 class AudioFileManager;
59
60 #pragma mark __________ AudioFilePlayer
61 class AudioFilePlayer
62 {
63 public:
64 AudioFilePlayer (const FSRef *inFileRef);
65
66 ~AudioFilePlayer();
67
68 void SetDestination (AudioUnit &inDestUnit,
69 int inBusNumber);
70
71 void SetNotifier (AudioFilePlayNotifier inNotifier, void *inRefCon)
72 {
73 mNotifier = inNotifier;
74 mRefCon = inRefCon;
75 }
76
77 void SetStartFrame (int frame); // seek in the file
78
79 int GetCurrentFrame (); // get the current frame position
80
81 void SetStopFrame (int frame); // set limit in the file
82
83 void Connect();
84
85 void Disconnect();
86
87 void DoNotification (OSStatus inError) const;
88
89 bool IsConnected () const { return mConnected; }
90
91 UInt32 GetBusNumber () const { return mBusNumber; }
92
93 AudioUnit GetDestUnit () const { return mPlayUnit; }
94
95 AudioConverterRef GetAudioConverter() const { return mConverter; }
96
97 #if DEBUG
98 void Print() const
99 {
100 CAShow (mAudioFileID);
101 printf ("Destination Bus:%ld\n", GetBusNumber());
102 printf ("Is 'aunt' unit:%s\n", (mIsAUNTUnit ? "true" : "false"));
103 printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false"));
104 if (mConverter) CAShow (mConverter);
105 printf ("- - - - - - - - - - - - - - \n");
106 }
107 #endif
108
109 const AudioStreamBasicDescription& GetFileFormat() const { return mFileDescription; }
110
111 private:
112 AudioUnit mPlayUnit;
113 UInt32 mBusNumber;
114 AudioFileID mAudioFileID;
115
116 AudioUnitInputCallback mInputCallback;
117
118 AudioStreamBasicDescription mFileDescription;
119
120 bool mConnected;
121 bool mIsAUNTUnit;
122
123 AudioFileManager* mAudioFileManager;
124 AudioConverterRef mConverter;
125
126 AudioFilePlayNotifier mNotifier;
127 void* mRefCon;
128
129 int mStartFrame;
130
131 #pragma mark __________ Private_Methods
132
133 void OpenFile (const FSRef *inRef, SInt64& outFileSize);
134 };
135
136 #pragma mark __________ AudioFileManager
137 class AudioFileManager
138 {
139 public:
140 AudioFileManager (AudioFilePlayer& inParent, AudioFileID inFile)
141 : mParent (inParent),
142 mAudioFileID (inFile),
143 mFileBuffer (0),
144 mByteCounter (0)
145 {}
146
147 virtual ~AudioFileManager();
148
149
150 void Connect (AudioConverterRef inConverter)
151 {
152 mParentConverter = inConverter;
153 DoConnect();
154 }
155
156 // this method should NOT be called by an object of this class
157 // as it is called by the parent's Disconnect() method
158 virtual void Disconnect () {}
159
160 const AudioFileID& GetFileID() const { return mAudioFileID; }
161
162 const char* GetFileBuffer () { return mFileBuffer; }
163
164 const AudioFilePlayer& GetParent () const { return mParent; }
165
166 virtual void SetPosition (SInt64 pos) = 0; // seek/rewind in the file
167
168 virtual int GetByteCounter () { return mByteCounter; } // return actual bytes streamed to audio hardware
169
170 virtual void SetEndOfFile (SInt64 pos) = 0; // set the "EOF" (will behave just like it reached eof)
171
172 protected:
173 AudioFilePlayer& mParent;
174 AudioConverterRef mParentConverter;
175 const AudioFileID mAudioFileID;
176
177 char* mFileBuffer;
178
179 OSStatus Render (AudioBuffer &ioData);
180
181 int mByteCounter;
182
183 virtual OSStatus GetFileData (void** inOutData, UInt32 *inOutDataSize) = 0;
184
185 virtual void DoConnect () = 0;
186
187 virtual void AfterRender () = 0;
188
189 public:
190 static OSStatus FileInputProc (void *inRefCon,
191 AudioUnitRenderActionFlags inActionFlags,
192 const AudioTimeStamp *inTimeStamp,
193 UInt32 inBusNumber,
194 AudioBuffer *ioData);
195 static OSStatus ACInputProc (AudioConverterRef inAudioConverter,
196 UInt32* outDataSize,
197 void** outData,
198 void* inUserData);
199 };
200
201
202 #pragma mark __________ AudioFileReaderThread
203 class AudioFileReaderThread
204 : public AudioFileManager
205 {
206 public:
207 const UInt32 mChunkSize;
208 SInt64 mFileLength;
209 SInt64 mReadFilePosition;
210 bool mWriteToFirstBuffer;
211 bool mFinishedReadingData;
212
213 AudioFileReaderThread (AudioFilePlayer &inParent,
214 AudioFileID &inFile,
215 SInt64 inFileLength,
216 UInt32 inChunkSize);
217
218 virtual void Disconnect ();
219
220 virtual void SetPosition (SInt64 pos); // seek/rewind in the file
221
222 virtual void SetEndOfFile (SInt64 pos); // set the "EOF" (will behave just like it reached eof)
223
224 protected:
225 virtual void DoConnect ();
226
227 virtual OSStatus GetFileData (void** inOutData, UInt32 *inOutDataSize);
228
229 virtual void AfterRender ();
230
231 private:
232 bool mReadFromFirstBuffer;
233 bool mLockUnsuccessful;
234 bool mIsEngaged;
235
236 int mNumTimesAskedSinceFinished;
237 };
238
239
240 #endif