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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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.
*/
/**
************************************************************************
* @file M4WAV_WavReader.h
* @brief WAV Reader declarations
* @note This file implements functions of the WAV reader
************************************************************************
*/
#include "M4OSA_CoreID.h"
#include "M4OSA_Types.h"
#include "M4OSA_Memory.h"
#include "M4OSA_FileReader.h"
#include "M4SYS_AccessUnit.h"
#include "M4TOOL_VersionInfo.h"
#define M4PCMC_ERR_PCM_NOT_COMPLIANT M4OSA_ERR_CREATE(M4_ERR, M4WAV_COMMON,0x000001)
#define M4PCMC_ERR_PCM_NO_SPACE_AVAIL M4OSA_ERR_CREATE(M4_ERR, M4WAV_COMMON,0x000002)
#define M4PCMC_ERR_PCM_NOT_SUPPORTED M4OSA_ERR_CREATE(M4_ERR, M4WAV_COMMON,0x000003)
#define M4PCMC_WAR_END_OF_STREAM M4OSA_ERR_CREATE(M4_WAR, M4WAV_COMMON ,0x000001)
/**
************************************************************************
* structure M4WAVC_DecoderSpecificInfo
* @brief This structure defines the decoder Specific informations
* @note This structure is used by the WAV reader to store all
* decoder specific informations:
* - Sample Frequency
* - Average Bytes per second
* - Number of channels (1 or 2)
* - Number of bits per sample (8 or 16)
************************************************************************
*/
typedef struct {
M4OSA_UInt32 SampleFrequency;
M4OSA_UInt32 AvgBytesPerSec;
M4OSA_UInt32 DataLength;
M4OSA_UInt16 nbChannels;
M4OSA_UInt16 BitsPerSample;
} M4PCMC_DecoderSpecificInfo;
/**
************************************************************************
* enum M4WAVR_State
* @brief This enum defines the WAV Reader States
* @note The state automaton is documented separately
* consult the design specification for details
************************************************************************
*/
typedef enum {
M4PCMR_kInit = 0x0000,
M4PCMR_kOpening = 0x0100,
M4PCMR_kOpening_streamRetrieved = 0x0101,
M4PCMR_kReading = 0x0200,
M4PCMR_kReading_nextAU = 0x0201,
M4PCMR_kClosed = 0x0300
} M4PCMR_State;
/**
************************************************************************
* enum M4WAVR_OptionID
* @brief This enum defines the WAV Reader options
* @note Only one option is available:
* - M4WAVR_kPCMblockSize: sets the size of the PCM block to read
* from WAV file
************************************************************************
*/
typedef enum {
M4PCMR_kPCMblockSize = M4OSA_OPTION_ID_CREATE(M4_READ, M4WAV_READER, 0x01)
} M4PCMR_OptionID;
/**
************************************************************************
* structure M4WAVR_Context
* @brief This structure defines the WAV Reader context
* @note This structure is used for all WAV Reader calls to store
* the context
************************************************************************
*/
typedef struct {
M4OSA_MemAddr32 m_pDecoderSpecInfo;/**< Pointer to the decoder specific info
structure contained in pStreamDesc
(only used to free...) */
M4OSA_FileReadPointer* m_pFileReadFunc;/**< The OSAL set of pointer to function for
file management */
M4OSA_Context m_fileContext; /**< The context needed by OSAL to manage File */
M4PCMC_DecoderSpecificInfo m_decoderConfig;/**< Specific configuration for decoder */
M4PCMR_State m_state; /**< state of the wav reader */
M4PCMR_State m_microState; /**< state of the read wav stream */
M4OSA_UInt32 m_blockSize; /**< Size of the read block */
M4OSA_UInt32 m_offset; /**< Offset of the PCM read (i.e m_offset of the
file without wav header) */
M4OSA_MemAddr32 m_pAuBuffer; /**< Re-used buffer for AU content storage */
M4OSA_FilePosition m_dataStartOffset;/**< offset of the pcm data beginning into
the file */
} M4PCMR_Context;
/*************************************************************************
*
* Prototypes of all WAV reader functions
*
************************************************************************/
M4OSA_ERR M4PCMR_openRead(M4OSA_Context* pContext, M4OSA_Void* pUrl,
M4OSA_FileReadPointer* pFileFunction);
M4OSA_ERR M4PCMR_getNextStream(M4OSA_Context context, M4SYS_StreamDescription* pStreamDesc);
M4OSA_ERR M4PCMR_startReading(M4OSA_Context context, M4SYS_StreamID* pStreamIDs);
M4OSA_ERR M4PCMR_nextAU(M4OSA_Context context, M4SYS_StreamID streamID, M4SYS_AccessUnit* pAU);
M4OSA_ERR M4PCMR_freeAU(M4OSA_Context context, M4SYS_StreamID streamID, M4SYS_AccessUnit* pAU);
M4OSA_ERR M4PCMR_seek(M4OSA_Context context, M4SYS_StreamID* pStreamID, M4OSA_Time time,
M4SYS_SeekAccessMode seekAccessMode, M4OSA_Time* pObtainCTS);
M4OSA_ERR M4PCMR_closeRead(M4OSA_Context context);
M4OSA_ERR M4PCMR_getOption(M4OSA_Context context, M4PCMR_OptionID optionID,
M4OSA_DataOption* pValue);
M4OSA_ERR M4PCMR_setOption(M4OSA_Context context, M4PCMR_OptionID optionID,
M4OSA_DataOption Value);
M4OSA_ERR M4PCMR_getVersion(M4_VersionInfo *pVersion);
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