frameworks/base/media/libstagefright/codecs/mp3dec/src/pvmp3_getbits.h

   1 /* ------------------------------------------------------------------
   2  * Copyright (C) 1998-2009 PacketVideo
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
  13  * express or implied.
  14  * See the License for the specific language governing permissions
  15  * and limitations under the License.
  16  * -------------------------------------------------------------------
  17  */
  18 /*
  19 ------------------------------------------------------------------------------
  20    PacketVideo Corp.
  21    MP3 Decoder Library
  22
  23    Filename: pvmp3_getbits.h
  24
  25      Date: 09/21/2007
  26
  27 ------------------------------------------------------------------------------
  28  REVISION HISTORY
  29
  30  Description:
  31
  32 ------------------------------------------------------------------------------
  33  INCLUDE DESCRIPTION
  34
  35
  36 ------------------------------------------------------------------------------
  37 */
  38
  39 /*----------------------------------------------------------------------------
  40 ; CONTINUE ONLY IF NOT ALREADY DEFINED
  41 ----------------------------------------------------------------------------*/
  42 #ifndef PVMP3_GETBITS_H
  43 #define PVMP3_GETBITS_H
  44
  45 /*----------------------------------------------------------------------------
  46 ; INCLUDES
  47 ----------------------------------------------------------------------------*/
  48 #include "pvmp3_dec_defs.h"
  49 #include "s_mp3bits.h"
  50 #include "pvmp3_audio_type_defs.h"
  51
  52 /*----------------------------------------------------------------------------
  53 ; MACROS
  54 ; Define module specific macros here
  55 ----------------------------------------------------------------------------*/
  56
  57 /*----------------------------------------------------------------------------
  58 ; DEFINES
  59 ; Include all pre-processor statements here.
  60 ----------------------------------------------------------------------------*/
  61 #define INBUF_ARRAY_INDEX_SHIFT  (3)
  62 #define INBUF_BIT_WIDTH         (1<<(INBUF_ARRAY_INDEX_SHIFT))
  63 #define INBUF_BIT_MODULO_MASK   ((INBUF_BIT_WIDTH)-1)
  64
  65
  66 /*----------------------------------------------------------------------------
  67 ; EXTERNAL VARIABLES REFERENCES
  68 ; Declare variables used in this module but defined elsewhere
  69 ----------------------------------------------------------------------------*/
  70
  71 /*----------------------------------------------------------------------------
  72 ; SIMPLE TYPEDEF'S
  73 ----------------------------------------------------------------------------*/
  74
  75 /*----------------------------------------------------------------------------
  76 ; ENUMERATED TYPEDEF'S
  77 ----------------------------------------------------------------------------*/
  78
  79 /*----------------------------------------------------------------------------
  80 ; STRUCTURES TYPEDEF'S
  81 ----------------------------------------------------------------------------*/
  82 #ifdef __cplusplus
  83 extern "C"
  84 {
  85 #endif
  86
  87     uint32 getNbits(tmp3Bits *pMainData,
  88     int32 neededBits);
  89
  90     uint16 getUpTo9bits(tmp3Bits *pMainData,
  91                         int32 neededBits);
  92
  93     uint32 getUpTo17bits(tmp3Bits *pMainData,
  94                          int32 neededBits);
  95
  96     uint8 get1bit(tmp3Bits *pMainData);
  97
  98 #ifdef __cplusplus
  99 }
 100 #endif
 101
 102 /*----------------------------------------------------------------------------
 103 ; GLOBAL FUNCTION DEFINITIONS
 104 ; Function Prototype declaration
 105 ----------------------------------------------------------------------------*/
 106
 107 /*----------------------------------------------------------------------------
 108 ; END
 109 ----------------------------------------------------------------------------*/
 110
 111 #endif
 112