/* Copyright (c) 2004-2011, John Hurst All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*! \file PCM_Parser.cpp \version $Id$ \brief AS-DCP library, PCM raw essence reader implementation */ #include #include #include using Kumu::DefaultLogSink; using namespace ASDCP; using namespace ASDCP::PCM; using namespace ASDCP::Wav; using namespace ASDCP::RF64; //------------------------------------------------------------------------------------------ // class ASDCP::PCM::WAVParser::h__WAVParser { Kumu::FileReader m_FileReader; bool m_EOF; ui32_t m_DataStart; ui64_t m_DataLength; ui64_t m_ReadCount; ui32_t m_FrameBufferSize; ui32_t m_FramesRead; Rational m_PictureRate; ASDCP_NO_COPY_CONSTRUCT(h__WAVParser); public: AudioDescriptor m_ADesc; h__WAVParser() : m_EOF(false), m_DataStart(0), m_DataLength(0), m_ReadCount(0), m_FrameBufferSize(0), m_FramesRead(0) {} ~h__WAVParser() { Close(); } Result_t OpenRead(const std::string& filename, const Rational& PictureRate); void Close(); void Reset(); Result_t ReadFrame(FrameBuffer&); Result_t Seek(ui32_t frame_number); }; // void ASDCP::PCM::WAVParser::h__WAVParser::Close() { m_FileReader.Close(); } // void ASDCP::PCM::WAVParser::h__WAVParser::Reset() { m_FileReader.Seek(m_DataStart); m_FramesRead = 0; m_ReadCount = 0; } // ASDCP::Result_t ASDCP::PCM::WAVParser::h__WAVParser::OpenRead(const std::string& filename, const Rational& PictureRate) { Result_t result = m_FileReader.OpenRead(filename); if ( ASDCP_SUCCESS(result) ) { SimpleWaveHeader WavHeader; result = WavHeader.ReadFromFile(m_FileReader, &m_DataStart); if ( ASDCP_SUCCESS(result) ) { WavHeader.FillADesc(m_ADesc, PictureRate); m_FrameBufferSize = ASDCP::PCM::CalcFrameBufferSize(m_ADesc); m_DataLength = WavHeader.data_len; m_ADesc.ContainerDuration = m_DataLength / m_FrameBufferSize; m_ADesc.ChannelFormat = PCM::CF_NONE; Reset(); } else { ASDCP::AIFF::SimpleAIFFHeader AIFFHeader; m_FileReader.Seek(0); result = AIFFHeader.ReadFromFile(m_FileReader, &m_DataStart); if ( ASDCP_SUCCESS(result) ) { AIFFHeader.FillADesc(m_ADesc, PictureRate); m_FrameBufferSize = ASDCP::PCM::CalcFrameBufferSize(m_ADesc); m_DataLength = AIFFHeader.data_len; m_ADesc.ContainerDuration = m_DataLength / m_FrameBufferSize; m_ADesc.ChannelFormat = PCM::CF_NONE; Reset(); } else { SimpleRF64Header RF64Header; m_FileReader.Seek(0); result = RF64Header.ReadFromFile(m_FileReader, &m_DataStart); if ( ASDCP_SUCCESS(result) ) { RF64Header.FillADesc(m_ADesc, PictureRate); m_FrameBufferSize = ASDCP::PCM::CalcFrameBufferSize(m_ADesc); m_DataLength = RF64Header.data_len; m_ADesc.ContainerDuration = m_DataLength / m_FrameBufferSize; m_ADesc.ChannelFormat = PCM::CF_NONE; Reset(); } } } } return result; } // ASDCP::Result_t ASDCP::PCM::WAVParser::h__WAVParser::ReadFrame(FrameBuffer& FB) { FB.Size(0); if ( m_EOF ) { return RESULT_ENDOFFILE; } if ( FB.Capacity() < m_FrameBufferSize ) { DefaultLogSink().Error("FrameBuf.Capacity: %u FrameLength: %u\n", FB.Capacity(), m_FrameBufferSize); return RESULT_SMALLBUF; } ui32_t read_count = 0; Result_t result = m_FileReader.Read(FB.Data(), (m_DataLength - m_ReadCount >= m_FrameBufferSize) ? m_FrameBufferSize : m_DataLength - m_ReadCount, &read_count); if ( result == RESULT_ENDOFFILE || (m_DataLength == m_ReadCount + read_count) ) { m_EOF = true; if ( read_count > 0 ) { result = RESULT_OK; } } if ( ASDCP_SUCCESS(result) ) { m_ReadCount += read_count; FB.Size(read_count); FB.FrameNumber(m_FramesRead++); if ( read_count < FB.Capacity() ) { memset(FB.Data() + FB.Size(), 0, FB.Capacity() - FB.Size()); } } return result; } // ASDCP::Result_t ASDCP::PCM::WAVParser::h__WAVParser::Seek(ui32_t frame_number) { m_FramesRead = frame_number - 1; m_ReadCount = 0; return m_FileReader.Seek(m_DataStart + m_FrameBufferSize * frame_number); } //------------------------------------------------------------------------------------------ ASDCP::PCM::WAVParser::WAVParser() { } ASDCP::PCM::WAVParser::~WAVParser() { } // Opens the stream for reading, parses enough data to provide a complete // set of stream metadata for the MXFWriter below. ASDCP::Result_t ASDCP::PCM::WAVParser::OpenRead(const std::string& filename, const Rational& PictureRate) const { const_cast(this)->m_Parser = new h__WAVParser; Result_t result = m_Parser->OpenRead(filename, PictureRate); if ( ASDCP_FAILURE(result) ) const_cast(this)->m_Parser.release(); return result; } // Rewinds the stream to the beginning. ASDCP::Result_t ASDCP::PCM::WAVParser::Reset() const { if ( m_Parser.empty() ) return RESULT_INIT; m_Parser->Reset(); return RESULT_OK; } // Places a frame of data in the frame buffer. Fails if the buffer is too small // or the stream is empty. ASDCP::Result_t ASDCP::PCM::WAVParser::ReadFrame(FrameBuffer& FB) const { if ( m_Parser.empty() ) return RESULT_INIT; return m_Parser->ReadFrame(FB); } ASDCP::Result_t ASDCP::PCM::WAVParser::FillAudioDescriptor(AudioDescriptor& ADesc) const { if ( m_Parser.empty() ) return RESULT_INIT; ADesc = m_Parser->m_ADesc; return RESULT_OK; } ASDCP::Result_t ASDCP::PCM::WAVParser::Seek(ui32_t frame_number) const { if ( m_Parser.empty() ) return RESULT_INIT; return m_Parser->Seek(frame_number);; } // // end PCM_Parser.cpp //