151 lines
3.4 KiB
C++
151 lines
3.4 KiB
C++
/* $Header: /cvs/root/winamp/vlb/aacdecoderapi.h,v 1.1 2009/04/28 20:21:07 audiodsp Exp $ */
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/***************************************************************************\
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*
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* Copyright 2000-2002 Dolby Laboratories, Inc. All Rights
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* Reserved. Do not copy. Do not distribute.
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* Confidential information.
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*
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* (C) copyright Fraunhofer - IIS (1998)
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* All Rights Reserved
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*
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* filename: aacdecoderapi.h
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* project : MPEG-2 AAC Decoder
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* contents/description: AAC decoder API
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*
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\***************************************************************************/
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#ifndef __AACDECODERAPI_H__
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#define __AACDECODERAPI_H__
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#include <stdio.h>
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#include "DataIO.h"
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#include "audio_io.h"
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/** AAC defines */
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#define AAC_MAX_PROGRAMS 16
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#define ADTS 0
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#define ADIF 1
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#define RIFFADTS 2
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/** API return value defines */
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#define ERR_NO_ERROR (0)
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/* Fatal errors (must re-sync) */
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#define ERR_INVALID_BITSTREAM (1)
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#define ERR_INVALID_ADIF_HEADER (2)
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#define ERR_SYNC_ERROR (3)
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#define ERR_SUBROUTINE_ERROR (4)
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#define ERR_END_OF_FILE (5)
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#define ERR_INVALID_ADTS_HEADER (6)
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#define ERR_INPUT_BUFFER_ERROR (7)
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#define ERR_OUTPUT_BUFFER_ERROR (8)
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#define ERR_ILLEGAL_PROFILE (9)
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#define ERR_ILLEGAL_SAMP_RATE (10)
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#define ERR_ILLEGAL_DATA_RATE (11)
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#define ERR_ILLEGAL_CHANNELS (12)
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#define ERR_CANNOT_SYNC_TO_ADIF (13)
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#define ERR_UNEXPECTED_ERROR (14)
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#define ERR_USER_ABORT (15)
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#define MAX_EXEC_ERRORS (16)//Insert new errors before this
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/* Warnings (keep decoding) */
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#define WARN_CRC_FAILED (-1)
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#define WARN_STREAM_PARAM_CHANGE (-2)
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/** structure defines for MPEG-2 AAC API Object */
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typedef struct {
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long sampling_frequency;
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long num_channels;
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long bitrate;
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short stream_format;
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long frame_length;
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short protection_absent;
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short copyright;
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short original_copy;
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} AACStreamParameters;
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/* Forward declarations */
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class CAacDecoder;
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class CPlainFile;
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class CDolbyBitBuffer;
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class CStreamInfo;
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class CAacException;
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/** MPEG-2 AAC API Object.
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This is the API object that interfaces with the application code.
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It wraps the bitstream element objects and calls their individual decoding methods.
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To indicate unexpected events and error conditions that prevent correct operation,
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an exception derived from \Ref{CAacException} will be thrown that should be caught
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by the calling application's decoding loop.
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*/
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class CAacDecoderApi
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{
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enum
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{
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cbSize = 2048
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};
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CAacDecoder *decoder;
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CPlainFile *input;
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CDolbyBitBuffer *buffer;
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CStreamInfo *info;
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unsigned char readbuf[cbSize];
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unsigned int cbValid, cbActual;
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const static unsigned int sfTab[16];
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long TranslateException(CAacException& e);
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void VerifySync(void);
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bool FillStreamParameters(AACStreamParameters *paacStreamParameters);
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public :
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/** Object Constructor.
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Instantiates a decoder object capable of decoding one stream of
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MPEG-2 AAC Audio Data.
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bs The \Ref{CBitStream} object that the decoder will read from.
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*/
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CAacDecoderApi(DataIOControl *paacInput);
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/** Object Destructor.
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*/
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~CAacDecoderApi();
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/** AAC API Synchronize Method
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Synchronizes to stream
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*/
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long Synchronize(AACStreamParameters *paacStreamParameters);
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/** AAC Decoding Method.
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This method delivers one frame of decoded pcm audio data.
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info The configuration information.
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*/
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long DecodeFrame ( AudioIOControl *ppcmOutput,
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AACStreamParameters *paacStreamParameters) ;
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} ;
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#endif
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