diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/audio/oal/stream.cpp | 267 |
1 files changed, 149 insertions, 118 deletions
diff --git a/src/audio/oal/stream.cpp b/src/audio/oal/stream.cpp index c084f2a9..f9c02821 100644 --- a/src/audio/oal/stream.cpp +++ b/src/audio/oal/stream.cpp @@ -174,35 +174,45 @@ class CWavFile : public IDecoder tFormatHeader() { memset(this, 0, sizeof(*this)); } }; - FILE* pFile; - bool bIsOpen; - tFormatHeader FormatHeader; + FILE *m_pFile; + bool m_bIsOpen; - uint32 DataStartOffset; - uint32 SampleCount; - uint32 SamplesPerBlock; + tFormatHeader m_FormatHeader; + + uint32 m_DataStartOffset; // TODO: 64 bit? + uint32 m_nSampleCount; + uint32 m_nSamplesPerBlock; // ADPCM things - uint8 *AdpcmBlock; - int16 **buffers; - CImaADPCMDecoder* decoders; + uint8 *m_pAdpcmBuffer; + int16 **m_ppPcmBuffers; + CImaADPCMDecoder *m_pAdpcmDecoders; void Close() { - if (pFile) { - fclose(pFile); - pFile = nil; + if (m_pFile) { + fclose(m_pFile); + m_pFile = nil; } - if (AdpcmBlock) delete[] AdpcmBlock; - if (buffers) delete[] buffers; - if (decoders) delete[] decoders; + delete[] m_pAdpcmBuffer; + delete[] m_ppPcmBuffers; + delete[] m_pAdpcmDecoders; + } + + uint32 GetCurrentSample() const + { + // TODO: 64 bit? + uint32 FilePos = ftell(m_pFile); + if (FilePos <= m_DataStartOffset) + return 0; + return (FilePos - m_DataStartOffset) / m_FormatHeader.BlockAlign * m_nSamplesPerBlock; } public: - CWavFile(const char* path) : bIsOpen(false), DataStartOffset(0), SampleCount(0), SamplesPerBlock(0), AdpcmBlock(nil), buffers(nil), decoders(nil) + CWavFile(const char* path) : m_bIsOpen(false), m_DataStartOffset(0), m_nSampleCount(0), m_nSamplesPerBlock(0), m_pAdpcmBuffer(nil), m_ppPcmBuffers(nil), m_pAdpcmDecoders(nil) { - pFile = fopen(path, "rb"); - if (!pFile) return; + m_pFile = fopen(path, "rb"); + if (!m_pFile) return; #define CLOSE_ON_ERROR(op)\ if (op) { \ @@ -212,52 +222,58 @@ public: tDataHeader DataHeader; - CLOSE_ON_ERROR(fread(&DataHeader, sizeof(DataHeader), 1, pFile) == 0); + CLOSE_ON_ERROR(fread(&DataHeader, sizeof(DataHeader), 1, m_pFile) == 0); CLOSE_ON_ERROR(DataHeader.ID != 'FFIR'); + // TODO? validate filesizes + int WAVE; - CLOSE_ON_ERROR(fread(&WAVE, 4, 1, pFile) == 0); + CLOSE_ON_ERROR(fread(&WAVE, 4, 1, m_pFile) == 0); CLOSE_ON_ERROR(WAVE != 'EVAW') - CLOSE_ON_ERROR(fread(&DataHeader, sizeof(DataHeader), 1, pFile) == 0); + CLOSE_ON_ERROR(fread(&DataHeader, sizeof(DataHeader), 1, m_pFile) == 0); CLOSE_ON_ERROR(DataHeader.ID != ' tmf'); - CLOSE_ON_ERROR(fread(&FormatHeader, Min(DataHeader.Size, sizeof(tFormatHeader)), 1, pFile) == 0); + CLOSE_ON_ERROR(fread(&m_FormatHeader, Min(DataHeader.Size, sizeof(tFormatHeader)), 1, m_pFile) == 0); CLOSE_ON_ERROR(DataHeader.Size > sizeof(tFormatHeader)); - switch (FormatHeader.AudioFormat) + switch (m_FormatHeader.AudioFormat) { case WAVEFMT_XBOX_ADPCM: - FormatHeader.AudioFormat = WAVEFMT_IMA_ADPCM; + m_FormatHeader.AudioFormat = WAVEFMT_IMA_ADPCM; case WAVEFMT_IMA_ADPCM: - SamplesPerBlock = (FormatHeader.BlockAlign / FormatHeader.NumChannels - 4) * 2 + 1; - AdpcmBlock = new uint8[FormatHeader.BlockAlign]; - buffers = new int16*[FormatHeader.NumChannels]; - decoders = new CImaADPCMDecoder[FormatHeader.NumChannels]; + m_nSamplesPerBlock = (m_FormatHeader.BlockAlign / m_FormatHeader.NumChannels - 4) * 2 + 1; + m_pAdpcmBuffer = new uint8[m_FormatHeader.BlockAlign]; + m_ppPcmBuffers = new int16*[m_FormatHeader.NumChannels]; + m_pAdpcmDecoders = new CImaADPCMDecoder[m_FormatHeader.NumChannels]; break; case WAVEFMT_PCM: - SamplesPerBlock = 1; - if (FormatHeader.BitsPerSample != 16) + m_nSamplesPerBlock = 1; + if (m_FormatHeader.BitsPerSample != 16) { - debug("Unsupported PCM (%d bits), only signed 16-bit is supported (%s)\n", FormatHeader.BitsPerSample, path); + debug("Unsupported PCM (%d bits), only signed 16-bit is supported (%s)\n", m_FormatHeader.BitsPerSample, path); + Close(); return; } break; default: - debug("Unsupported wav format 0x%x (%s)\n", FormatHeader.AudioFormat, path); + debug("Unsupported wav format 0x%x (%s)\n", m_FormatHeader.AudioFormat, path); + Close(); return; } while (true) { - CLOSE_ON_ERROR(fread(&DataHeader, sizeof(DataHeader), 1, pFile) == 0); + CLOSE_ON_ERROR(fread(&DataHeader, sizeof(DataHeader), 1, m_pFile) == 0); if (DataHeader.ID == 'atad') break; - fseek(pFile, DataHeader.Size, SEEK_CUR); + fseek(m_pFile, DataHeader.Size, SEEK_CUR); + // TODO? validate data size + // maybe check if there no extreme custom headers that might break this } - DataStartOffset = ftell(pFile); - SampleCount = DataHeader.Size / FormatHeader.BlockAlign * SamplesPerBlock; + m_DataStartOffset = ftell(m_pFile); + m_nSampleCount = DataHeader.Size / m_FormatHeader.BlockAlign * m_nSamplesPerBlock; - bIsOpen = true; + m_bIsOpen = true; #undef CLOSE_ON_ERROR } @@ -268,7 +284,7 @@ public: bool IsOpened() { - return bIsOpen; + return m_bIsOpen; } uint32 GetSampleSize() @@ -278,29 +294,29 @@ public: uint32 GetSampleCount() { - return SampleCount; + return m_nSampleCount; } uint32 GetSampleRate() { - return FormatHeader.SampleRate; + return m_FormatHeader.SampleRate; } uint32 GetChannels() { - return FormatHeader.NumChannels; + return m_FormatHeader.NumChannels; } void Seek(uint32 milliseconds) { if (!IsOpened()) return; - fseek(pFile, DataStartOffset + ms2samples(milliseconds) / SamplesPerBlock * FormatHeader.BlockAlign, SEEK_SET); + fseek(m_pFile, m_DataStartOffset + ms2samples(milliseconds) / m_nSamplesPerBlock * m_FormatHeader.BlockAlign, SEEK_SET); } uint32 Tell() { if (!IsOpened()) return 0; - return samples2ms((ftell(pFile) - DataStartOffset) / FormatHeader.BlockAlign * SamplesPerBlock); + return samples2ms(GetCurrentSample()); } #define SAMPLES_IN_LINE (8) @@ -309,52 +325,61 @@ public: { if (!IsOpened()) return 0; - if (FormatHeader.AudioFormat == WAVEFMT_PCM) + if (m_FormatHeader.AudioFormat == WAVEFMT_PCM) { - uint32 size = fread(buffer, 1, GetBufferSize(), pFile); - if (FormatHeader.NumChannels == 2) + // just read the file and sort the samples + uint32 size = fread(buffer, 1, GetBufferSize(), m_pFile); + if (m_FormatHeader.NumChannels == 2) SortStereoBuffer.SortStereo(buffer, size); return size; } - else if (FormatHeader.AudioFormat == WAVEFMT_IMA_ADPCM) + else if (m_FormatHeader.AudioFormat == WAVEFMT_IMA_ADPCM) { - uint32 MaxSamples = GetBufferSamples() / FormatHeader.NumChannels; - uint32 CurSample = (ftell(pFile) - DataStartOffset) / FormatHeader.BlockAlign * SamplesPerBlock; - - MaxSamples = Min(MaxSamples, SampleCount - CurSample); - MaxSamples = MaxSamples / SamplesPerBlock * SamplesPerBlock; - uint32 OutBufSizePerChannel = MaxSamples * GetSampleSize(); - uint32 OutBufSize = OutBufSizePerChannel * FormatHeader.NumChannels; - int16** buffers = new int16*[FormatHeader.NumChannels]; - CImaADPCMDecoder* decoders = new CImaADPCMDecoder[FormatHeader.NumChannels]; - for (uint32 i = 0; i < FormatHeader.NumChannels; i++) - buffers[i] = (int16*)((int8*)buffer + OutBufSizePerChannel * i); + // trim the buffer size if we're at the end of our file + uint32 nMaxSamples = GetBufferSamples() / m_FormatHeader.NumChannels; + uint32 nSamplesLeft = m_nSampleCount - GetCurrentSample(); + nMaxSamples = Min(nMaxSamples, nSamplesLeft); + + // align sample count to our block + nMaxSamples = nMaxSamples / m_nSamplesPerBlock * m_nSamplesPerBlock; + + // count the size of output buffer + uint32 OutBufSizePerChannel = nMaxSamples * GetSampleSize(); + uint32 OutBufSize = OutBufSizePerChannel * m_FormatHeader.NumChannels; + + // calculate the pointers to individual channel buffers + for (uint32 i = 0; i < m_FormatHeader.NumChannels; i++) + m_ppPcmBuffers[i] = (int16*)((int8*)buffer + OutBufSizePerChannel * i); uint32 samplesRead = 0; - while (samplesRead < MaxSamples) + while (samplesRead < nMaxSamples) { - uint8* AdpcmBuf = AdpcmBlock; - if (fread(AdpcmBlock, 1, FormatHeader.BlockAlign, pFile) == 0) + // read the file + uint8 *pAdpcmBuf = m_pAdpcmBuffer; + if (fread(m_pAdpcmBuffer, 1, m_FormatHeader.BlockAlign, m_pFile) == 0) return 0; - for (uint32 i = 0; i < FormatHeader.NumChannels; i++) + // get the first sample in adpcm block and initialise the decoder(s) + for (uint32 i = 0; i < m_FormatHeader.NumChannels; i++) { - int16 Sample = *(int16*)AdpcmBuf; - AdpcmBuf += sizeof(int16); - int16 Step = *(int16*)AdpcmBuf; - AdpcmBuf += sizeof(int16); - decoders[i].Init(Sample, Step); - *(buffers[i]) = Sample; - buffers[i]++; + int16 Sample = *(int16*)pAdpcmBuf; + pAdpcmBuf += sizeof(int16); + int16 Step = *(int16*)pAdpcmBuf; + pAdpcmBuf += sizeof(int16); + m_pAdpcmDecoders[i].Init(Sample, Step); + *(m_ppPcmBuffers[i]) = Sample; + m_ppPcmBuffers[i]++; } samplesRead++; - for (uint32 s = 1; s < SamplesPerBlock; s += SAMPLES_IN_LINE) + + // decode the rest of the block + for (uint32 s = 1; s < m_nSamplesPerBlock; s += SAMPLES_IN_LINE) { - for (uint32 i = 0; i < FormatHeader.NumChannels; i++) + for (uint32 i = 0; i < m_FormatHeader.NumChannels; i++) { - decoders[i].Decode(AdpcmBuf, buffers[i], SAMPLES_IN_LINE / 2); - AdpcmBuf += SAMPLES_IN_LINE / 2; - buffers[i] += SAMPLES_IN_LINE; + m_pAdpcmDecoders[i].Decode(pAdpcmBuf, m_ppPcmBuffers[i], SAMPLES_IN_LINE / 2); + pAdpcmBuf += SAMPLES_IN_LINE / 2; + m_ppPcmBuffers[i] += SAMPLES_IN_LINE; } samplesRead += SAMPLES_IN_LINE; } @@ -613,68 +638,68 @@ public: class CVbFile : public IDecoder { - FILE* pFile; - size_t m_FileSize; - size_t m_nNumberOfBlocks; - CVagDecoder* decoders; + FILE *m_pFile; + CVagDecoder *m_pVagDecoders; - uint32 m_nSampleRate; - uint8 m_nChannels; - bool m_bBlockRead; - uint16 m_LineInBlock; - size_t m_CurrentBlock; + size_t m_FileSize; + size_t m_nNumberOfBlocks; - uint8** ppTempBuffers; - int16** buffers; + uint32 m_nSampleRate; + uint8 m_nChannels; + bool m_bBlockRead; + uint16 m_LineInBlock; + size_t m_CurrentBlock; + + uint8 **m_ppVagBuffers; // buffers that cache actual ADPCM file data + int16 **m_ppPcmBuffers; void ReadBlock(int32 block = -1) { // just read next block if -1 if (block != -1) - fseek(pFile, block * m_nChannels * VB_BLOCK_SIZE, SEEK_SET); + fseek(m_pFile, block * m_nChannels * VB_BLOCK_SIZE, SEEK_SET); for (int i = 0; i < m_nChannels; i++) - fread(ppTempBuffers[i], VB_BLOCK_SIZE, 1, pFile); + fread(m_ppVagBuffers[i], VB_BLOCK_SIZE, 1, m_pFile); m_bBlockRead = true; } public: - CVbFile(const char* path, uint32 nSampleRate = 32000, uint8 nChannels = 2) : m_nSampleRate(nSampleRate), m_nChannels(nChannels), decoders(nil), ppTempBuffers(nil), buffers(nil), + CVbFile(const char* path, uint32 nSampleRate = 32000, uint8 nChannels = 2) : m_nSampleRate(nSampleRate), m_nChannels(nChannels), m_pVagDecoders(nil), m_ppVagBuffers(nil), m_ppPcmBuffers(nil), m_FileSize(0), m_nNumberOfBlocks(0), m_bBlockRead(false), m_LineInBlock(0), m_CurrentBlock(0) { - pFile = fopen(path, "rb"); - if (!pFile) return; + m_pFile = fopen(path, "rb"); + if (!m_pFile) return; + + fseek(m_pFile, 0, SEEK_END); + m_FileSize = ftell(m_pFile); + fseek(m_pFile, 0, SEEK_SET); - fseek(pFile, 0, SEEK_END); - m_FileSize = ftell(pFile); - fseek(pFile, 0, SEEK_SET); m_nNumberOfBlocks = m_FileSize / (nChannels * VB_BLOCK_SIZE); - decoders = new CVagDecoder[nChannels]; - m_CurrentBlock = 0; - m_LineInBlock = 0; - m_bBlockRead = false; - ppTempBuffers = new uint8*[nChannels]; - buffers = new int16*[nChannels]; + m_pVagDecoders = new CVagDecoder[nChannels]; + m_ppVagBuffers = new uint8*[nChannels]; + m_ppPcmBuffers = new int16*[nChannels]; for (uint8 i = 0; i < nChannels; i++) - ppTempBuffers[i] = new uint8[VB_BLOCK_SIZE]; + m_ppVagBuffers[i] = new uint8[VB_BLOCK_SIZE]; } ~CVbFile() { - if (pFile) + if (m_pFile) { - fclose(pFile); - delete[] decoders; + fclose(m_pFile); + + delete[] m_pVagDecoders; for (int i = 0; i < m_nChannels; i++) - delete[] ppTempBuffers[i]; - delete[] ppTempBuffers; - delete[] buffers; + delete[] m_ppVagBuffers[i]; + delete[] m_ppVagBuffers; + delete[] m_ppPcmBuffers; } } bool IsOpened() { - return pFile != nil; + return m_pFile != nil; } uint32 GetSampleSize() @@ -702,6 +727,8 @@ public: { if (!IsOpened()) return; uint32 samples = ms2samples(milliseconds); + + // find the block of our sample uint32 block = samples / NUM_VAG_SAMPLES_IN_BLOCK; if (block > m_nNumberOfBlocks) { @@ -711,6 +738,7 @@ public: if (block != m_CurrentBlock) m_bBlockRead = false; + // find a line of our sample within our block uint32 remainingSamples = samples - block * NUM_VAG_SAMPLES_IN_BLOCK; uint32 newLine = remainingSamples / VAG_SAMPLES_IN_LINE / VAG_LINE_SIZE; @@ -719,7 +747,7 @@ public: m_CurrentBlock = block; m_LineInBlock = newLine; for (uint32 i = 0; i < GetChannels(); i++) - decoders[i].ResetState(); + m_pVagDecoders[i].ResetState(); } } @@ -735,35 +763,38 @@ public: { if (!IsOpened()) return 0; + if (m_CurrentBlock >= m_nNumberOfBlocks) return 0; + + // cache current ADPCM block if (!m_bBlockRead) ReadBlock(m_CurrentBlock); - if (m_CurrentBlock == m_nNumberOfBlocks) return 0; - int size = 0; - + // trim the buffer size if we're at the end of our file int numberOfRequiredLines = GetBufferSamples() / m_nChannels / VAG_SAMPLES_IN_LINE; int numberOfRemainingLines = (m_nNumberOfBlocks - m_CurrentBlock) * NUM_VAG_LINES_IN_BLOCK - m_LineInBlock; int bufSizePerChannel = Min(numberOfRequiredLines, numberOfRemainingLines) * VAG_SAMPLES_IN_LINE * GetSampleSize(); - if (numberOfRequiredLines > numberOfRemainingLines) - numberOfRemainingLines = numberOfRemainingLines; - + // calculate the pointers to individual channel buffers for (uint32 i = 0; i < m_nChannels; i++) - buffers[i] = (int16*)((int8*)buffer + bufSizePerChannel * i); + m_ppPcmBuffers[i] = (int16*)((int8*)buffer + bufSizePerChannel * i); + int size = 0; while (size < bufSizePerChannel) { + // decode the VAG lines for (uint32 i = 0; i < m_nChannels; i++) { - decoders[i].Decode(ppTempBuffers[i] + m_LineInBlock * VAG_LINE_SIZE, buffers[i], VAG_LINE_SIZE); - buffers[i] += VAG_SAMPLES_IN_LINE; + m_pVagDecoders[i].Decode(m_ppVagBuffers[i] + m_LineInBlock * VAG_LINE_SIZE, m_ppPcmBuffers[i], VAG_LINE_SIZE); + m_ppPcmBuffers[i] += VAG_SAMPLES_IN_LINE; } size += VAG_SAMPLES_IN_LINE * GetSampleSize(); m_LineInBlock++; + + // block is over, read the next block if (m_LineInBlock >= NUM_VAG_LINES_IN_BLOCK) { m_CurrentBlock++; - if (m_CurrentBlock >= m_nNumberOfBlocks) + if (m_CurrentBlock >= m_nNumberOfBlocks) // end of file break; m_LineInBlock = 0; ReadBlock(); |