Simplify time representation; better in-tree DCP subtitle parser.

1 files changed, 198 insertions, 0 deletions

diff --git a/asdcplib/src/WavFileWriter.h b/asdcplib/src/WavFileWriter.h
new file mode 100755
index 0000000..daf26ea
--- /dev/null
+++ b/asdcplib/src/WavFileWriter.h
@@ -0,0 +1,198 @@
+/*
+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    WavFileWriter.h
+    \version $Id: WavFileWriter.h,v 1.6 2009/04/09 19:16:49 msheby Exp $
+    \brief   demux and write PCM data to WAV file(s)
+*/
+
+#include <KM_fileio.h>
+#include <KM_log.h>
+#include <Wav.h>
+#include <list>
+
+#ifndef _WAVFILEWRITER_H_
+#define _WAVFILEWRITER_H_
+
+
+//
+class WavFileElement : public Kumu::FileWriter
+{
+  ASDCP::PCM::FrameBuffer m_Buf;
+  byte_t* m_p;
+
+  WavFileElement();
+  KM_NO_COPY_CONSTRUCT(WavFileElement);
+
+public:
+  WavFileElement(ui32_t s) : m_Buf(s), m_p(0)
+  {
+    m_p = m_Buf.Data();
+  }
+
+  ~WavFileElement() {}
+
+  void WriteSample(const byte_t* sample, ui32_t sample_size)
+  {
+    memcpy(m_p, sample, sample_size);
+    m_p += sample_size;
+  }
+
+  ASDCP::Result_t Flush()
+  {
+    ui32_t write_count = 0;
+
+    if ( m_p == m_Buf.Data() )
+      return ASDCP::RESULT_EMPTY_FB;
+
+    ui32_t write_size = m_p - m_Buf.Data();
+    m_p = m_Buf.Data();
+    return Write(m_Buf.RoData(), write_size, &write_count);
+  }
+};
+
+
+//
+class WavFileWriter
+{
+  ASDCP::PCM::AudioDescriptor m_ADesc;
+  std::list<WavFileElement*>  m_OutFile;
+  ui32_t                      m_ChannelCount;
+  ASDCP_NO_COPY_CONSTRUCT(WavFileWriter);
+
+ public:
+  WavFileWriter() : m_ChannelCount(0) {}
+  ~WavFileWriter()
+    {
+      while ( ! m_OutFile.empty() )
+	{
+	  delete m_OutFile.back();
+	  m_OutFile.pop_back();
+	}
+    }
+
+  //
+  enum SplitType_t {
+    ST_NONE,   // write all channels to a single WAV file
+    ST_MONO,   // write each channel a separate WAV file
+    ST_STEREO  // write channel pairs to separate WAV files
+  };
+
+  ASDCP::Result_t
+    OpenWrite(ASDCP::PCM::AudioDescriptor &ADesc, const char* file_root, SplitType_t split = ST_NONE)
+    {
+      ASDCP_TEST_NULL_STR(file_root);
+      char filename[Kumu::MaxFilePath];
+      ui32_t file_count = 0;
+      ASDCP::Result_t result = ASDCP::RESULT_OK;
+      m_ADesc = ADesc;
+
+      switch ( split )
+	{
+	case ST_NONE:
+	  file_count = 1;
+	  m_ChannelCount = m_ADesc.ChannelCount;
+	  break;
+
+	case ST_MONO:
+	  file_count = m_ADesc.ChannelCount;
+	  m_ChannelCount = 1;
+	  break;
+
+	case ST_STEREO:
+	  if ( m_ADesc.ChannelCount % 2 != 0 )
+	    {
+	      Kumu::DefaultLogSink().Error("Unable to create 2-channel splits with odd number of input channels.\n");
+	      return ASDCP::RESULT_PARAM;
+	    }
+
+	  file_count = m_ADesc.ChannelCount / 2;
+	  m_ChannelCount = 2;
+	  break;
+	}
+      assert(file_count && m_ChannelCount);
+
+      ui32_t element_size = ASDCP::PCM::CalcFrameBufferSize(m_ADesc) / file_count;
+
+      for ( ui32_t i = 0; i < file_count && ASDCP_SUCCESS(result); i++ )
+	{
+	  snprintf(filename, Kumu::MaxFilePath, "%s_%u.wav", file_root, (i + 1));
+	  m_OutFile.push_back(new WavFileElement(element_size));
+	  result = m_OutFile.back()->OpenWrite(filename);
+
+	  if ( ASDCP_SUCCESS(result) )
+	    {
+	      ASDCP::PCM::AudioDescriptor tmpDesc = m_ADesc;
+	      tmpDesc.ChannelCount = m_ChannelCount;
+	      ASDCP::Wav::SimpleWaveHeader Wav(tmpDesc);
+	      result = Wav.WriteToFile(*(m_OutFile.back()));
+	    }
+	}
+      
+      return result;
+    }
+
+  ASDCP::Result_t
+    WriteFrame(ASDCP::PCM::FrameBuffer& FB)
+    {
+      if ( m_OutFile.empty() )
+	return ASDCP::RESULT_STATE;
+
+      if ( m_OutFile.size() == 1 ) // no de-interleave needed, just write out the frame
+	return m_OutFile.back()->Write(FB.RoData(), FB.Size(), 0);
+ 
+      std::list<WavFileElement*>::iterator fi;
+      ui32_t sample_size = m_ADesc.QuantizationBits / 8;
+      const byte_t* p = FB.RoData();
+      const byte_t* end_p = p + FB.Size();
+
+      while ( p < end_p )
+	{
+	  for ( fi = m_OutFile.begin(); fi != m_OutFile.end(); fi++ )
+	    {
+	      for ( ui32_t c = 0; c < m_ChannelCount; c++ )
+		{
+		  (*fi)->WriteSample(p, sample_size);
+		  p += sample_size;
+		}
+	    }
+	}
+
+      ASDCP::Result_t result = ASDCP::RESULT_OK;
+
+      for ( fi = m_OutFile.begin(); fi != m_OutFile.end() && ASDCP_SUCCESS(result); fi++ )
+	result = (*fi)->Flush();
+
+      return result;
+    }
+};
+
+
+#endif // _WAVFILEWRITER_H_
+
+//
+// end WavFileWriter.h
+//