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-rwxr-xr-xasdcplib/src/Wav.cpp370
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diff --git a/asdcplib/src/Wav.cpp b/asdcplib/src/Wav.cpp
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-/*
-Copyright (c) 2005-2009, 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 Wav.cpp
- \version $Id: Wav.cpp,v 1.11 2010/02/16 18:40:57 jhurst Exp $
- \brief Wave file common elements
-*/
-
-#include "Wav.h"
-#include <assert.h>
-#include <KM_log.h>
-using Kumu::DefaultLogSink;
-
-
-const ui32_t SimpleWavHeaderLength = 46;
-
-//
-ASDCP::Wav::SimpleWaveHeader::SimpleWaveHeader(ASDCP::PCM::AudioDescriptor& ADesc)
-{
- format = 1;
- nchannels = ADesc.ChannelCount;
- bitspersample = ADesc.QuantizationBits;
- samplespersec = (ui32_t)ceil(ADesc.AudioSamplingRate.Quotient());
- blockalign = nchannels * (bitspersample / 8);
- avgbps = samplespersec * blockalign;
- cbsize = 0;
- data_len = ASDCP::PCM::CalcFrameBufferSize(ADesc) * ADesc.ContainerDuration;
-}
-
-//
-void
-ASDCP::Wav::SimpleWaveHeader::FillADesc(ASDCP::PCM::AudioDescriptor& ADesc, ASDCP::Rational PictureRate) const
-{
- ADesc.EditRate = PictureRate;
-
- ADesc.LinkedTrackID = 0;
- ADesc.Locked = 0;
- ADesc.ChannelCount = nchannels;
- ADesc.AudioSamplingRate = Rational(samplespersec, 1);
- ADesc.AvgBps = avgbps;
- ADesc.BlockAlign = blockalign;
- ADesc.QuantizationBits = bitspersample;
- ui32_t FrameBufferSize = ASDCP::PCM::CalcFrameBufferSize(ADesc);
- ADesc.ContainerDuration = data_len / FrameBufferSize;
- ADesc.ChannelFormat = PCM::CF_NONE;
-}
-
-
-//
-ASDCP::Result_t
-ASDCP::Wav::SimpleWaveHeader::WriteToFile(Kumu::FileWriter& OutFile) const
-{
- ui32_t write_count;
- byte_t tmp_header[SimpleWavHeaderLength];
- byte_t* p = tmp_header;
-
- static ui32_t fmt_len =
- sizeof(format)
- + sizeof(nchannels)
- + sizeof(samplespersec)
- + sizeof(avgbps)
- + sizeof(blockalign)
- + sizeof(bitspersample)
- + sizeof(cbsize);
-
- ui32_t RIFF_len = data_len + SimpleWavHeaderLength - 8;
-
- memcpy(p, &FCC_RIFF, sizeof(fourcc)); p += 4;
- *((ui32_t*)p) = KM_i32_LE(RIFF_len); p += 4;
- memcpy(p, &FCC_WAVE, sizeof(fourcc)); p += 4;
- memcpy(p, &FCC_fmt_, sizeof(fourcc)); p += 4;
- *((ui32_t*)p) = KM_i32_LE(fmt_len); p += 4;
- *((ui16_t*)p) = KM_i16_LE(format); p += 2;
- *((ui16_t*)p) = KM_i16_LE(nchannels); p += 2;
- *((ui32_t*)p) = KM_i32_LE(samplespersec); p += 4;
- *((ui32_t*)p) = KM_i32_LE(avgbps); p += 4;
- *((ui16_t*)p) = KM_i16_LE(blockalign); p += 2;
- *((ui16_t*)p) = KM_i16_LE(bitspersample); p += 2;
- *((ui16_t*)p) = KM_i16_LE(cbsize); p += 2;
- memcpy(p, &FCC_data, sizeof(fourcc)); p += 4;
- *((ui32_t*)p) = KM_i32_LE(data_len); p += 4;
-
- return OutFile.Write(tmp_header, SimpleWavHeaderLength, &write_count);
-}
-
-//
-ASDCP::Result_t
-ASDCP::Wav::SimpleWaveHeader::ReadFromFile(const Kumu::FileReader& InFile, ui32_t* data_start)
-{
- ui32_t read_count = 0;
- ui32_t local_data_start = 0;
- ASDCP::PCM::FrameBuffer TmpBuffer(MaxWavHeader);
-
- if ( data_start == 0 )
- data_start = &local_data_start;
-
- Result_t result = InFile.Read(TmpBuffer.Data(), TmpBuffer.Capacity(), &read_count);
-
- if ( ASDCP_SUCCESS(result) )
- result = ReadFromBuffer(TmpBuffer.RoData(), read_count, data_start);
-
- return result;
-}
-
-ASDCP::Result_t
-ASDCP::Wav::SimpleWaveHeader::ReadFromBuffer(const byte_t* buf, ui32_t buf_len, ui32_t* data_start)
-{
- if ( buf_len < SimpleWavHeaderLength )
- return RESULT_SMALLBUF;
-
- *data_start = 0;
- const byte_t* p = buf;
- const byte_t* end_p = p + buf_len;
-
- fourcc test_RIFF(p); p += 4;
- if ( test_RIFF != FCC_RIFF )
- {
- // DefaultLogSink().Debug("File does not begin with RIFF header\n");
- return RESULT_RAW_FORMAT;
- }
-
- ui32_t RIFF_len = KM_i32_LE(*(ui32_t*)p); p += 4;
-
- fourcc test_WAVE(p); p += 4;
- if ( test_WAVE != FCC_WAVE )
- {
- DefaultLogSink().Debug("File does not contain a WAVE header\n");
- return RESULT_RAW_FORMAT;
- }
-
- fourcc test_fcc;
-
- while ( p < end_p )
- {
- test_fcc = fourcc(p); p += 4;
- ui32_t chunk_size = KM_i32_LE(*(ui32_t*)p); p += 4;
-
- if ( test_fcc == FCC_data )
- {
- if ( chunk_size > RIFF_len )
- {
- DefaultLogSink().Error("Chunk size %u larger than file: %u\n", chunk_size, RIFF_len);
- return RESULT_RAW_FORMAT;
- }
-
- data_len = chunk_size;
- *data_start = p - buf;
- break;
- }
-
- if ( test_fcc == FCC_fmt_ )
- {
- ui16_t format = KM_i16_LE(*(ui16_t*)p); p += 2;
-
- if ( format != WAVE_FORMAT_PCM && format != WAVE_FORMAT_EXTENSIBLE )
- {
- DefaultLogSink().Error("Expecting uncompressed PCM data, got format type %hd\n", format);
- return RESULT_RAW_FORMAT;
- }
-
- nchannels = KM_i16_LE(*(ui16_t*)p); p += 2;
- samplespersec = KM_i32_LE(*(ui32_t*)p); p += 4;
- avgbps = KM_i32_LE(*(ui32_t*)p); p += 4;
- blockalign = KM_i16_LE(*(ui16_t*)p); p += 2;
- bitspersample = KM_i16_LE(*(ui16_t*)p); p += 2;
- p += chunk_size - 16; // 16 is the number of bytes read in this block
- }
- else
- {
- p += chunk_size;
- }
- }
-
- if ( *data_start == 0 ) // can't have no data!
- {
- DefaultLogSink().Error("No data chunk found, file contains no essence\n");
- return RESULT_RAW_FORMAT;
- }
-
- return RESULT_OK;
-}
-
-//------------------------------------------------------------------------------------------
-// conversion algorithms from http://www.borg.com/~jglatt/tech/aiff.htm
-
-//
-void
-Rat_to_extended(ASDCP::Rational rate, byte_t* buf)
-{
- memset(buf, 0, 10);
- ui32_t value = (ui32_t)ceil(rate.Quotient());
- ui32_t exp = value;
- exp >>= 1;
- ui8_t i = 0;
-
- for ( ; i < 32; i++ )
- {
- exp >>= 1;
- if ( ! exp )
- break;
- }
-
- *(buf+1) = i;
-
- for ( i = 32; i != 0 ; i-- )
- {
- if ( value & 0x80000000 )
- break;
- value <<= 1;
- }
-
- *(ui32_t*)(buf+2) = KM_i32_BE(value);
-}
-
-//
-ASDCP::Rational
-extended_to_Rat(const byte_t* buf)
-{
- ui32_t last = 0;
- ui32_t mantissa = KM_i32_BE(*(ui32_t*)(buf+2));
-
- byte_t exp = 30 - *(buf+1);
-
- while ( exp-- )
- {
- last = mantissa;
- mantissa >>= 1;
- }
-
- if ( last & 0x00000001 )
- mantissa++;
-
- return ASDCP::Rational(mantissa, 1);
-}
-
-//
-void
-ASDCP::AIFF::SimpleAIFFHeader::FillADesc(ASDCP::PCM::AudioDescriptor& ADesc, ASDCP::Rational PictureRate) const
-{
- ADesc.EditRate = PictureRate;
-
- ADesc.ChannelCount = numChannels;
- ADesc.AudioSamplingRate = extended_to_Rat(sampleRate);
- ADesc.QuantizationBits = sampleSize;
- ADesc.BlockAlign = sampleSize / 8;
- ADesc.AvgBps = (ui32_t) (ADesc.BlockAlign * ADesc.AudioSamplingRate.Quotient());
- ui32_t FrameBufferSize = ASDCP::PCM::CalcFrameBufferSize(ADesc);
- ADesc.ContainerDuration = data_len / FrameBufferSize;
- ADesc.ChannelFormat = PCM::CF_NONE;
-}
-
-//
-ASDCP::Result_t
-ASDCP::AIFF::SimpleAIFFHeader::ReadFromFile(const Kumu::FileReader& InFile, ui32_t* data_start)
-{
- ui32_t read_count = 0;
- ui32_t local_data_start = 0;
- ASDCP::PCM::FrameBuffer TmpBuffer(Wav::MaxWavHeader);
-
- if ( data_start == 0 )
- data_start = &local_data_start;
-
- Result_t result = InFile.Read(TmpBuffer.Data(), TmpBuffer.Capacity(), &read_count);
-
- if ( ASDCP_SUCCESS(result) )
- result = ReadFromBuffer(TmpBuffer.RoData(), read_count, data_start);
-
- return result;
-}
-
-//
-ASDCP::Result_t
-ASDCP::AIFF::SimpleAIFFHeader::ReadFromBuffer(const byte_t* buf, ui32_t buf_len, ui32_t* data_start)
-{
- if ( buf_len < 32 )
- return RESULT_SMALLBUF;
-
- *data_start = 0;
- const byte_t* p = buf;
- const byte_t* end_p = p + buf_len;
-
- fourcc test_FORM(p); p += 4;
- if ( test_FORM != FCC_FORM )
- {
- // DefaultLogSink().Debug("File does not begin with FORM header\n");
- return RESULT_RAW_FORMAT;
- }
-
- ui32_t RIFF_len = KM_i32_BE(*(ui32_t*)p); p += 4;
-
- fourcc test_AIFF(p); p += 4;
- if ( test_AIFF != FCC_AIFF )
- {
- DefaultLogSink().Debug("File does not contain an AIFF header\n");
- return RESULT_RAW_FORMAT;
- }
-
- fourcc test_fcc;
-
- while ( p < end_p )
- {
- test_fcc = fourcc(p); p += 4;
- ui32_t chunk_size = KM_i32_BE(*(ui32_t*)p); p += 4;
-
- if ( test_fcc == FCC_COMM )
- {
- numChannels = KM_i16_BE(*(ui16_t*)p); p += 2;
- numSampleFrames = KM_i32_BE(*(ui32_t*)p); p += 4;
- sampleSize = KM_i16_BE(*(ui16_t*)p); p += 2;
- memcpy(sampleRate, p, 10);
- p += 10;
- }
- else if ( test_fcc == FCC_SSND )
- {
- if ( chunk_size > RIFF_len )
- {
- DefaultLogSink().Error("Chunk size %u larger than file: %u\n", chunk_size, RIFF_len);
- return RESULT_RAW_FORMAT;
- }
-
- ui32_t offset = KM_i32_BE(*(ui32_t*)p); p += 4;
- p += 4; // blockSize;
-
- data_len = chunk_size - 8;
- *data_start = (p - buf) + offset;
- break;
- }
- else
- {
- p += chunk_size;
- }
- }
-
- if ( *data_start == 0 ) // can't have no data!
- {
- DefaultLogSink().Error("No data chunk found, file contains no essence\n");
- return RESULT_RAW_FORMAT;
- }
-
- return RESULT_OK;
-}
-
-
-
-//
-// end Wav.cpp
-//
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