00001
00008
00009 #ifndef WAVREADER_H_INCLUDED
00010 #define WAVREADER_H_INCLUDED
00011
00012 #include <string>
00013 #include <fstream>
00014 #include "datatypes.h"
00015
00016 namespace ac3 {
00017
00018 #define WAVREADER_UNKNOWN_ERROR -1
00019 #define WAVREADER_NO_ERROR 0
00020 #define WAVREADER_FILE_OPEN_ERROR 1
00021 #define WAVREADER_FILE_NOT_OPEN 2
00022 #define WAVREADER_READ_ERROR 3
00023 #define WAVREADER_INVALID_FORMAT 4
00024 #define WAVREADER_UNSUPPORTED_FORMAT 5
00025 #define WAVREADER_CHUNK_NOT_FOUND 6
00026 #define WAVREADER_SAMPLE_DOES_NOT_EXIST 7
00027 #define WAVREADER_CHANNEL_DOES_NOT_EXIST 8
00028
00029 #define WAVREADER_ERROR_NUM 9
00030
00038 class CWAVReaderException
00039 {
00040 public:
00042 CWAVReaderException() : m_nReason(WAVREADER_UNKNOWN_ERROR) {}
00044 CWAVReaderException(int nReason) : m_nReason(nReason) {}
00046 CWAVReaderException(int nReason, const std::string& sHint)
00047 : m_nReason(nReason), m_sHint(sHint) {}
00048
00049 public:
00051 int GetReason() const { return m_nReason; }
00053 std::string GetHint() const { return m_sHint; }
00054 std::string GetString() const;
00055
00056 private:
00057 int m_nReason;
00058 std::string m_sHint;
00059
00060 static std::string m_sUnknownError;
00061 static std::string m_sError[WAVREADER_ERROR_NUM];
00062 };
00063
00078 class CWAVReader
00079 {
00080 public:
00081 CWAVReader();
00082 CWAVReader(const char* pszFilename);
00083 CWAVReader(const std::string& sFilename);
00084 private:
00085 CWAVReader(const CWAVReader& r) {}
00086 public:
00087 ~CWAVReader();
00088
00089 public:
00090 void OpenFile(const std::string& sFilename);
00091 void OpenFile(const char* pszFilename);
00092 void CloseFile();
00093
00094 void GetSamplesAs8Bit(UINT32 nCount, UINT16 nChannel,
00095 UINT8* pnBuffer, UINT32 nStart = (UINT32)-1);
00096 void GetSamplesAs16Bit(UINT32 nCount, UINT16 nChannel,
00097 INT16* pnBuffer, UINT32 nStart = (UINT32)-1);
00098 void GetSamplesAs24Bit(UINT32 nCount, UINT16 nChannel,
00099 INT32* pnBuffer, UINT32 nStart = (UINT32)-1);
00100 void GetSamplesAs32Bit(UINT32 nCount, UINT16 nChannel,
00101 INT32* pnBuffer, UINT32 nStart = (UINT32)-1);
00102
00103 void SetChannelPos(UINT16 nChannel, UINT32 nNewPos);
00104 UINT32 GetChannelPos(UINT16 nChannel);
00105 UINT32 SamplesLeft(UINT16 nChannel);
00106
00107 UINT32 GetSampleRate() const;
00108 UINT16 GetChannelCount() const;
00109 UINT16 GetBitsPerSample() const;
00110 UINT32 GetSampleCount() const;
00111
00112 UINT32 TimeToSample(double dSec) const;
00113 double SampleToTime(UINT32 nSample) const;
00114
00115 private:
00116 void ParseHeader();
00117 UINT32 SeekToSubchunk(const std::string& sSubchunk);
00118 void SeekToSample(UINT32 nSample);
00119 bool SampleExists(UINT32 nSample) const;
00120
00121 void Read8BitSamples(UINT32 nStart, UINT32 nCount, UINT16 nChannel,
00122 UINT8* pnBuffer);
00123 void Read16BitSamples(UINT32 nStart, UINT32 nCount, UINT16 nChannel,
00124 INT16* pnBuffer);
00125 void Read24BitSamples(UINT32 nStart, UINT32 nCount, UINT16 nChannel,
00126 INT32* pnBuffer);
00127 void Read32BitSamples(UINT32 nStart, UINT32 nCount, UINT16 nChannel,
00128 INT32* pnBuffer);
00129
00130 std::string ReadFOURCC();
00131 INT8 ReadINT8();
00132 UINT8 ReadUINT8();
00133 INT16 ReadINT16();
00134 UINT16 ReadUINT16();
00135 INT32 ReadINT24();
00136 UINT32 ReadUINT24();
00137 INT32 ReadINT32();
00138 UINT32 ReadUINT32();
00139
00140 CWAVReader& operator=(const CWAVReader& r) { return *this; }
00141
00142 private:
00143 bool m_bFileOpen;
00144 std::ifstream m_file;
00145 UINT32 m_nRiffChunkDataSize;
00146
00147 UINT16 m_nChannels;
00148 UINT32 m_nSampleRate;
00149 UINT16 m_nBitsPerSample;
00150
00151 std::streampos m_dataPos;
00152 UINT32 m_nDataSize;
00153
00154 std::vector<UINT32> m_channelPos;
00155 };
00156
00157 }
00158
00159 #endif // WAVREADER_H_INCLUDED
