| 1 | /* Copyright: © Copyright 2004 Apple Computer, Inc. All rights reserved. |
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| 2 | |
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| 3 | Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. |
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| 4 | ("Apple") in consideration of your agreement to the following terms, and your |
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| 5 | use, installation, modification or redistribution of this Apple software |
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| 6 | constitutes acceptance of these terms. If you do not agree with these terms, |
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| 7 | please do not use, install, modify or redistribute this Apple software. |
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| 8 | |
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| 9 | In consideration of your agreement to abide by the following terms, and subject |
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| 10 | to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs |
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| 11 | copyrights in this original Apple software (the "Apple Software"), to use, |
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| 12 | reproduce, modify and redistribute the Apple Software, with or without |
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| 13 | modifications, in source and/or binary forms; provided that if you redistribute |
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| 14 | the Apple Software in its entirety and without modifications, you must retain |
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| 15 | this notice and the following text and disclaimers in all such redistributions of |
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| 16 | the Apple Software. Neither the name, trademarks, service marks or logos of |
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| 17 | Apple Computer, Inc. may be used to endorse or promote products derived from the |
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| 18 | Apple Software without specific prior written permission from Apple. Except as |
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| 19 | expressly stated in this notice, no other rights or licenses, express or implied, |
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| 20 | are granted by Apple herein, including but not limited to any patent rights that |
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| 21 | may be infringed by your derivative works or by other works in which the Apple |
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| 22 | Software may be incorporated. |
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| 23 | |
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| 24 | The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO |
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| 25 | WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED |
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| 26 | WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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| 27 | PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN |
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| 28 | COMBINATION WITH YOUR PRODUCTS. |
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| 29 | |
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| 30 | IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR |
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| 31 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
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| 32 | GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 33 | ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION |
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| 34 | OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT |
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| 35 | (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN |
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| 36 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 37 | */ |
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| 38 | /*============================================================================= |
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| 39 | SMACIMAscom.h |
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| 40 | |
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| 41 | =============================================================================*/ |
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| 42 | #if !defined(__SMACIMAscom_h__) |
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| 43 | #define __SMACIMAscom_h__ |
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| 44 | |
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| 45 | //============================================================================= |
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| 46 | // Includes |
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| 47 | //============================================================================= |
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| 48 | |
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| 49 | #include "SMACscom.h" |
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| 50 | |
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| 51 | #define kIMA4BlockSamples 64 /* no. samples in a block */ |
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| 52 | #define kIMA4BlockFrames 32 /* no. frames in a block */ |
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| 53 | #define kIMA4BlockBytes 34 /* no. bytes in a block */ |
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| 54 | #define kIMA4BytesPerSample 2 /* no. bytes in decompressed sample */ |
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| 55 | |
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| 56 | //============================================================================= |
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| 57 | // SMACIMAscom |
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| 58 | //============================================================================= |
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| 59 | |
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| 60 | class SMACIMAscom |
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| 61 | : |
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| 62 | public SMACscom |
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| 63 | { |
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| 64 | |
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| 65 | // Construction/Destruction |
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| 66 | public: |
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| 67 | SMACIMAscom(ComponentInstance inSelf); |
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| 68 | virtual ~SMACIMAscom(); |
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| 69 | |
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| 70 | // Sound Component Methods |
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| 71 | public: |
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| 72 | virtual void GetInfo(SoundSource inSourceID, OSType inSelector, void* outData); |
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| 73 | virtual void SetInfo(SoundSource inSourceID, OSType inSelector, void* inData); |
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| 74 | |
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| 75 | virtual void SetOutput(SoundComponentData* inRequested, SoundComponentData** inActual); |
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| 76 | |
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| 77 | virtual void GetSourceData(SoundComponentData** outData); |
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| 78 | |
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| 79 | // Implementation |
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| 80 | protected: |
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| 81 | virtual void GetCompressionInfo(CompressionInfo& outCompressionInfo); |
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| 82 | virtual void GetCompressionParams(void* outData); |
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| 83 | virtual ComponentInstance SetCompressionParams(const void* inData); |
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| 84 | |
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| 85 | void CreateIMAEncoder(); |
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| 86 | |
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| 87 | // Utility routines |
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| 88 | protected: |
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| 89 | static Component FindIMAAudioEncoderComponent(const AudioStreamBasicDescription& inFormat); |
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| 90 | ComponentInstance InitializeIMAAudioEncoder(Component inEncoderComponent, const AudioStreamBasicDescription& inFormat); |
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| 91 | UInt32 mNumChannels; |
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| 92 | UInt32 mSampleRate; |
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| 93 | |
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| 94 | }; |
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| 95 | |
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| 96 | #endif |
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