libfaad2/neaacdec.h

   1 /*
   2 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
   3 ** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
   4 **
   5 ** This program is free software; you can redistribute it and/or modify
   6 ** it under the terms of the GNU General Public License as published by
   7 ** the Free Software Foundation; either version 2 of the License, or
   8 ** (at your option) any later version.
   9 **
  10 ** This program 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
  13 ** GNU General Public License for more details.
  14 **
  15 ** You should have received a copy of the GNU General Public License
  16 ** along with this program; if not, write to the Free Software
  17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 **
  19 ** Any non-GPL usage of this software or parts of this software is strictly
  20 ** forbidden.
  21 **
  22 ** Commercial non-GPL licensing of this software is possible.
  23 ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
  24 **
  25 ** $Id: neaacdec.h,v 1.4 2004/04/03 10:49:14 menno Exp $
  26 **/
  27
  28 #ifndef __NEAACDEC_H__
  29 #define __NEAACDEC_H__
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif /* __cplusplus */
  34
  35
  36 #if 1
  37 /* MACROS FOR BACKWARDS COMPATIBILITY */
  38 /* structs */
  39 #define faacDecHandle                  NeAACDecHandle
  40 #define faacDecConfiguration           NeAACDecConfiguration
  41 #define faacDecConfigurationPtr        NeAACDecConfigurationPtr
  42 #define faacDecFrameInfo               NeAACDecFrameInfo
  43 /* functions */
  44 #define faacDecGetErrorMessage         NeAACDecGetErrorMessage
  45 #define faacDecSetConfiguration        NeAACDecSetConfiguration
  46 #define faacDecGetCurrentConfiguration NeAACDecGetCurrentConfiguration
  47 #define faacDecInit                    NeAACDecInit
  48 #define faacDecInit2                   NeAACDecInit2
  49 #define faacDecInitDRM                 NeAACDecInitDRM
  50 #define faacDecPostSeekReset           NeAACDecPostSeekReset
  51 #define faacDecOpen                    NeAACDecOpen
  52 #define faacDecClose                   NeAACDecClose
  53 #define faacDecDecode                  NeAACDecDecode
  54 #define AudioSpecificConfig            NeAACDecAudioSpecificConfig
  55 #endif
  56
  57
  58 #ifdef _WIN32
  59   #pragma pack(push, 8)
  60   #ifndef NEAACDECAPI
  61     #define NEAACDECAPI __cdecl
  62   #endif
  63 #else
  64   #ifndef NEAACDECAPI
  65     #define NEAACDECAPI
  66   #endif
  67 #endif
  68
  69 #define FAAD2_VERSION "2.1 beta"
  70
  71 /* object types for AAC */
  72 #define MAIN       1
  73 #define LC         2
  74 #define SSR        3
  75 #define LTP        4
  76 #define HE_AAC     5
  77 #define ER_LC     17
  78 #define ER_LTP    19
  79 #define LD        23
  80 #define DRM_ER_LC 27 /* special object type for DRM */
  81
  82 /* header types */
  83 #define RAW        0
  84 #define ADIF       1
  85 #define ADTS       2
  86
  87 /* SBR signalling */
  88 #define NO_SBR           0
  89 #define SBR_UPSAMPLED    1
  90 #define SBR_DOWNSAMPLED  2
  91 #define NO_SBR_UPSAMPLED 3
  92
  93 /* library output formats */
  94 #define FAAD_FMT_16BIT  1
  95 #define FAAD_FMT_24BIT  2
  96 #define FAAD_FMT_32BIT  3
  97 #define FAAD_FMT_FLOAT  4
  98 #define FAAD_FMT_FIXED  FAAD_FMT_FLOAT
  99 #define FAAD_FMT_DOUBLE 5
 100
 101 /* Capabilities */
 102 #define LC_DEC_CAP           (1<<0) /* Can decode LC */
 103 #define MAIN_DEC_CAP         (1<<1) /* Can decode MAIN */
 104 #define LTP_DEC_CAP          (1<<2) /* Can decode LTP */
 105 #define LD_DEC_CAP           (1<<3) /* Can decode LD */
 106 #define ERROR_RESILIENCE_CAP (1<<4) /* Can decode ER */
 107 #define FIXED_POINT_CAP      (1<<5) /* Fixed point */
 108
 109 /* Channel definitions */
 110 #define FRONT_CHANNEL_CENTER (1)
 111 #define FRONT_CHANNEL_LEFT   (2)
 112 #define FRONT_CHANNEL_RIGHT  (3)
 113 #define SIDE_CHANNEL_LEFT    (4)
 114 #define SIDE_CHANNEL_RIGHT   (5)
 115 #define BACK_CHANNEL_LEFT    (6)
 116 #define BACK_CHANNEL_RIGHT   (7)
 117 #define BACK_CHANNEL_CENTER  (8)
 118 #define LFE_CHANNEL          (9)
 119 #define UNKNOWN_CHANNEL      (0)
 120
 121 /* DRM channel definitions */
 122 #define DRMCH_MONO          1
 123 #define DRMCH_STEREO        2
 124 #define DRMCH_SBR_MONO      3
 125 #define DRMCH_SBR_STEREO    4
 126 #define DRMCH_SBR_PS_STEREO 5
 127
 128
 129 /* A decode call can eat up to FAAD_MIN_STREAMSIZE bytes per decoded channel,
 130    so at least so much bytes per channel should be available in this stream */
 131 #define FAAD_MIN_STREAMSIZE 768 /* 6144 bits/channel */
 132
 133
 134 typedef void *NeAACDecHandle;
 135
 136 typedef struct mp4AudioSpecificConfig
 137 {
 138     /* Audio Specific Info */
 139     unsigned char objectTypeIndex;
 140     unsigned char samplingFrequencyIndex;
 141     unsigned long samplingFrequency;
 142     unsigned char channelsConfiguration;
 143
 144     /* GA Specific Info */
 145     unsigned char frameLengthFlag;
 146     unsigned char dependsOnCoreCoder;
 147     unsigned short coreCoderDelay;
 148     unsigned char extensionFlag;
 149     unsigned char aacSectionDataResilienceFlag;
 150     unsigned char aacScalefactorDataResilienceFlag;
 151     unsigned char aacSpectralDataResilienceFlag;
 152     unsigned char epConfig;
 153
 154     char sbr_present_flag;
 155     char forceUpSampling;
 156     char downSampledSBR;
 157 } mp4AudioSpecificConfig;
 158
 159 typedef struct NeAACDecConfiguration
 160 {
 161     unsigned char defObjectType;
 162     unsigned long defSampleRate;
 163     unsigned char outputFormat;
 164     unsigned char downMatrix;
 165     unsigned char useOldADTSFormat;
 166     unsigned char dontUpSampleImplicitSBR;
 167 } NeAACDecConfiguration, *NeAACDecConfigurationPtr;
 168
 169 typedef struct NeAACDecFrameInfo
 170 {
 171     unsigned long bytesconsumed;
 172     unsigned long samples;
 173     unsigned char channels;
 174     unsigned char error;
 175     unsigned long samplerate;
 176
 177     /* SBR: 0: off, 1: on; upsample, 2: on; downsampled, 3: off; upsampled */
 178     unsigned char sbr;
 179
 180     /* MPEG-4 ObjectType */
 181     unsigned char object_type;
 182
 183     /* AAC header type; MP4 will be signalled as RAW also */
 184     unsigned char header_type;
 185
 186     /* multichannel configuration */
 187     unsigned char num_front_channels;
 188     unsigned char num_side_channels;
 189     unsigned char num_back_channels;
 190     unsigned char num_lfe_channels;
 191     unsigned char channel_position[64];
 192 } NeAACDecFrameInfo;
 193
 194 char* NEAACDECAPI NeAACDecGetErrorMessage(unsigned char errcode);
 195
 196 unsigned long NEAACDECAPI NeAACDecGetCapabilities(void);
 197
 198 NeAACDecHandle NEAACDECAPI NeAACDecOpen(void);
 199
 200 NeAACDecConfigurationPtr NEAACDECAPI NeAACDecGetCurrentConfiguration(NeAACDecHandle hDecoder);
 201
 202 unsigned char NEAACDECAPI NeAACDecSetConfiguration(NeAACDecHandle hDecoder,
 203                                                    NeAACDecConfigurationPtr config);
 204
 205 /* Init the library based on info from the AAC file (ADTS/ADIF) */
 206 long NEAACDECAPI NeAACDecInit(NeAACDecHandle hDecoder,
 207                               unsigned char *buffer,
 208                               unsigned long buffer_size,
 209                               unsigned long *samplerate,
 210                               unsigned char *channels);
 211
 212 /* Init the library using a DecoderSpecificInfo */
 213 char NEAACDECAPI NeAACDecInit2(NeAACDecHandle hDecoder, unsigned char *pBuffer,
 214                                unsigned long SizeOfDecoderSpecificInfo,
 215                                unsigned long *samplerate, unsigned char *channels);
 216
 217 /* Init the library for DRM */
 218 char NEAACDECAPI NeAACDecInitDRM(NeAACDecHandle *hDecoder, unsigned long samplerate,
 219                                  unsigned char channels);
 220
 221 void NEAACDECAPI NeAACDecPostSeekReset(NeAACDecHandle hDecoder, long frame);
 222
 223 void NEAACDECAPI NeAACDecClose(NeAACDecHandle hDecoder);
 224
 225 void* NEAACDECAPI NeAACDecDecode(NeAACDecHandle hDecoder,
 226                                  NeAACDecFrameInfo *hInfo,
 227                                  unsigned char *buffer,
 228                                  unsigned long buffer_size);
 229
 230 char NEAACDECAPI NeAACDecAudioSpecificConfig(unsigned char *pBuffer,
 231                                              unsigned long buffer_size,
 232                                              mp4AudioSpecificConfig *mp4ASC);
 233
 234 #ifdef _WIN32
 235   #pragma pack(pop)
 236 #endif
 237
 238 #ifdef __cplusplus
 239 }
 240 #endif /* __cplusplus */
 241
 242 #endif