200 lines
5.4 KiB
C
200 lines
5.4 KiB
C
/* ------------------------------------------------------------------
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* Copyright (C) 1998-2009 PacketVideo
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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* -------------------------------------------------------------------
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*/
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/*
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------------------------------------------------------------------------------
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PacketVideo Corp.
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MP3 Decoder Library
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Filename: pvmp3_dec_defs.h
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Date: 09/21/2007
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------------------------------------------------------------------------------
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REVISION HISTORY
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Description:
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------------------------------------------------------------------------------
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INCLUDE DESCRIPTION
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This include file has the mp3 decoder common defines.
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------------------------------------------------------------------------------
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*/
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/*----------------------------------------------------------------------------
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; CONTINUE ONLY IF NOT ALREADY DEFINED
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----------------------------------------------------------------------------*/
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#ifndef PVMP3_DEC_DEFS_H
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#define PVMP3_DEC_DEFS_H
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/*----------------------------------------------------------------------------
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; INCLUDES
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----------------------------------------------------------------------------*/
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#include "pvmp3_audio_type_defs.h"
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#include "pvmp3decoder_api.h"
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/*----------------------------------------------------------------------------
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; MACROS
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; Define module specific macros here
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----------------------------------------------------------------------------*/
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#define module(x, POW2) ((x)&(POW2-1))
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/*----------------------------------------------------------------------------
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; DEFINES
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; Include all pre-processor statements here.
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----------------------------------------------------------------------------*/
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#define BUFSIZE 8192 // big enough to hold 4608 bytes == biggest mp3 frame
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#define CHAN 2
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#define GRAN 2
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#define SUBBANDS_NUMBER 32
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#define FILTERBANK_BANDS 18
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#define HAN_SIZE 512
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/* MPEG Header Definitions - ID Bit Values */
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#define MPEG_1 0
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#define MPEG_2 1
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#define MPEG_2_5 2
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#define INVALID_VERSION -1
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/* MPEG Header Definitions - Mode Values */
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#define MPG_MD_STEREO 0
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#define MPG_MD_JOINT_STEREO 1
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#define MPG_MD_DUAL_CHANNEL 2
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#define MPG_MD_MONO 3
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#define LEFT 0
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#define RIGHT 1
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#define SYNC_WORD (int32)0x7ff
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#define SYNC_WORD_LNGTH 11
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/*----------------------------------------------------------------------------
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; EXTERNAL VARIABLES REFERENCES
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; Declare variables used in this module but defined elsewhere
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; SIMPLE TYPEDEF'S
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; ENUMERATED TYPEDEF'S
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----------------------------------------------------------------------------*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*----------------------------------------------------------------------------
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; STRUCTURES TYPEDEF'S
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----------------------------------------------------------------------------*/
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/* Header Information Structure */
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typedef struct
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{
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int32 version_x;
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int32 layer_description;
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int32 error_protection;
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int32 bitrate_index;
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int32 sampling_frequency;
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int32 padding;
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int32 extension;
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int32 mode;
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int32 mode_ext;
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int32 copyright;
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int32 original;
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int32 emphasis;
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} mp3Header;
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/* Layer III side information. */
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typedef struct
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{
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uint32 part2_3_length;
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uint32 big_values;
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int32 global_gain;
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uint32 scalefac_compress;
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uint32 window_switching_flag;
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uint32 block_type;
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uint32 mixed_block_flag;
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uint32 table_select[3];
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uint32 subblock_gain[3];
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uint32 region0_count;
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uint32 region1_count;
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uint32 preflag;
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uint32 scalefac_scale;
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uint32 count1table_select;
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} granuleInfo;
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typedef struct
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{
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uint32 scfsi[4];
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granuleInfo gran[2];
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} channelInfo;
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/* Layer III side info. */
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typedef struct
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{
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uint32 main_data_begin;
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uint32 private_bits;
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channelInfo ch[2];
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} mp3SideInfo;
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/* Layer III scale factors. */
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typedef struct
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{
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int32 l[23]; /* [cb] */
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int32 s[3][13]; /* [window][cb] */
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} mp3ScaleFactors;
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#ifdef __cplusplus
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}
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#endif
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/*----------------------------------------------------------------------------
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; GLOBAL FUNCTION DEFINITIONS
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; Function Prototype declaration
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----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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; END
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----------------------------------------------------------------------------*/
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#endif
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