mirror of
https://github.com/cookiengineer/audacity
synced 2025-11-21 16:37:12 +01:00
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
|
|
* Copyright (c) 2011 Apple Inc. All rights reserved.
|
|
*
|
|
* @APPLE_APACHE_LICENSE_HEADER_START@
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License") ;
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* @APPLE_APACHE_LICENSE_HEADER_END@
|
|
*/
|
|
|
|
/*=============================================================================
|
|
File: ALACBitUtilities.h
|
|
|
|
$NoKeywords: $
|
|
=============================================================================*/
|
|
|
|
#ifndef __ALACBITUTILITIES_H
|
|
#define __ALACBITUTILITIES_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifndef MIN
|
|
#define MIN(x, y) ((x) < (y) ? (x) : (y))
|
|
#endif // MIN
|
|
#ifndef MAX
|
|
#define MAX(x, y) ((x) > (y) ? (x) : (y))
|
|
#endif // MAX
|
|
|
|
#define RequireAction(condition, action) if (! (condition)) { action }
|
|
#define RequireActionSilent(condition, action) if (! (condition)) { action }
|
|
#define RequireNoErr(condition, action) if (condition) { action }
|
|
|
|
enum
|
|
{
|
|
ALAC_noErr = 0
|
|
} ;
|
|
|
|
|
|
typedef enum
|
|
{ ID_SCE = 0, /* Single Channel Element */
|
|
ID_CPE = 1, /* Channel Pair Element */
|
|
ID_CCE = 2, /* Coupling Channel Element */
|
|
ID_LFE = 3, /* LFE Channel Element */
|
|
ID_DSE = 4, /* not yet supported */
|
|
ID_PCE = 5,
|
|
ID_FIL = 6,
|
|
ID_END = 7
|
|
} ELEMENT_TYPE ;
|
|
|
|
// types
|
|
typedef struct BitBuffer
|
|
{
|
|
uint8_t * cur ;
|
|
uint8_t * end ;
|
|
uint32_t bitIndex ;
|
|
uint32_t byteSize ;
|
|
|
|
} BitBuffer ;
|
|
|
|
/*
|
|
BitBuffer routines
|
|
- these routines take a fixed size buffer and read/write to it
|
|
- bounds checking must be done by the client
|
|
*/
|
|
void BitBufferInit (BitBuffer * bits, uint8_t * buffer, uint32_t byteSize) ;
|
|
uint32_t BitBufferRead (BitBuffer * bits, uint8_t numBits) ; // note: cannot read more than 16 bits at a time
|
|
uint8_t BitBufferReadSmall (BitBuffer * bits, uint8_t numBits) ;
|
|
uint8_t BitBufferReadOne (BitBuffer * bits) ;
|
|
uint32_t BitBufferPeek (BitBuffer * bits, uint8_t numBits) ; // note: cannot read more than 16 bits at a time
|
|
uint32_t BitBufferPeekOne (BitBuffer * bits) ;
|
|
uint32_t BitBufferUnpackBERSize (BitBuffer * bits) ;
|
|
uint32_t BitBufferGetPosition (BitBuffer * bits) ;
|
|
void BitBufferByteAlign (BitBuffer * bits, int32_t addZeros) ;
|
|
void BitBufferAdvance (BitBuffer * bits, uint32_t numBits) ;
|
|
void BitBufferRewind (BitBuffer * bits, uint32_t numBits) ;
|
|
void BitBufferWrite (BitBuffer * bits, uint32_t value, uint32_t numBits) ;
|
|
void BitBufferReset (BitBuffer * bits) ;
|
|
|
|
#endif /* __BITUTILITIES_H */
|