/*
Copyright (c) 20013-2013, John Hurst
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   derived from this software without specific prior written permission.

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*/
/*! \file    PCMDataProviders.cpp
    \version $Id$
    \brief   Implementation of PCM sample data providers for WAV, AtmosSync and Silence.
*/

#include <PCMDataProviders.h>

#include <KM_log.h>

using namespace ASDCP;
using namespace Kumu;

ASDCP::PCMDataProviderInterface::~PCMDataProviderInterface() {}

//
ASDCP::WAVDataProvider::WAVDataProvider()
    : m_Parser(), m_FB(), m_ADesc(), m_SampleSize(0), m_ptr(NULL)
{}

ASDCP::WAVDataProvider::~WAVDataProvider()
{}

Result_t
ASDCP::WAVDataProvider::PutSample(const ui32_t numChannels, byte_t* buf, ui32_t* bytesWritten)
{
  ASDCP_TEST_NULL(buf);
  ASDCP_TEST_NULL(m_ptr);
  if ( numChannels > m_ADesc.ChannelCount)
  {
    DefaultLogSink().Error("Requested %u channels from a wav file with %u channel.", numChannels,
                           m_ADesc.ChannelCount);
    return RESULT_FAIL;
  }
  *bytesWritten = m_SampleSize * numChannels;
  ::memcpy(buf, m_ptr, *bytesWritten);
  m_ptr += *bytesWritten;
  return RESULT_OK;
}

Result_t
ASDCP::WAVDataProvider::ReadFrame()
{
  Result_t result = m_Parser.ReadFrame(m_FB);
  m_ptr = ASDCP_SUCCESS(result) ? m_FB.RoData() : NULL;
  return result;
}

Result_t
ASDCP::WAVDataProvider::FillAudioDescriptor(PCM::AudioDescriptor& ADesc) const
{
  ADesc = m_ADesc;
  return RESULT_OK;
}

Result_t
ASDCP::WAVDataProvider::Reset()
{
    return m_Parser.Reset();
}

Result_t
ASDCP::WAVDataProvider::OpenRead(const char* filename, const Rational& PictureRate)
{
  ASDCP_TEST_NULL_STR(filename);

  Result_t result = m_Parser.OpenRead(filename, PictureRate);

  if ( ASDCP_SUCCESS(result) )
    result = m_Parser.FillAudioDescriptor(m_ADesc);

  if ( ASDCP_SUCCESS(result) )
  {
    m_ADesc.EditRate = PictureRate;
    m_SampleSize = ((m_ADesc.QuantizationBits + 7) / 8);
    result = m_FB.Capacity(PCM::CalcFrameBufferSize(m_ADesc));
  }

  return result;
}

//
ASDCP::AtmosSyncDataProvider::AtmosSyncDataProvider(const ui16_t bitsPerSample, const ui32_t sampleRate,
                                                    const ASDCP::Rational& editRate, const byte_t* uuid)
    : m_Generator(bitsPerSample, sampleRate, editRate, uuid), m_FB(), m_ADesc(), m_SampleSize()
{
    m_Generator.FillAudioDescriptor(m_ADesc);
    m_SampleSize = PCM::CalcSampleSize(m_ADesc);
    m_FB.Capacity(PCM::CalcFrameBufferSize(m_ADesc));
}

ASDCP::AtmosSyncDataProvider::~AtmosSyncDataProvider()
{}

Result_t
ASDCP::AtmosSyncDataProvider::PutSample(const ui32_t numChannels, byte_t* buf, ui32_t* bytesWritten)
{
  ASDCP_TEST_NULL(buf);
  ASDCP_TEST_NULL(m_ptr);
  if ( numChannels > m_ADesc.ChannelCount)
  {
    DefaultLogSink().Error("Requested %u channels from a wav file with %u channel.", numChannels,
                           m_ADesc.ChannelCount);
    return RESULT_FAIL;
  }

  (*bytesWritten) = m_SampleSize;
  ::memcpy(buf, m_ptr, m_SampleSize);
  m_ptr += m_SampleSize;
  return RESULT_OK;
}

Result_t
ASDCP::AtmosSyncDataProvider::ReadFrame()
{
  Result_t result = m_Generator.ReadFrame(m_FB);
  m_ptr = ASDCP_SUCCESS(result) ? m_FB.RoData() : NULL;
  return result;
}

Result_t
ASDCP::AtmosSyncDataProvider::FillAudioDescriptor(PCM::AudioDescriptor& ADesc) const
{
  ADesc = m_ADesc;
  return RESULT_OK;
}

Result_t
ASDCP::AtmosSyncDataProvider::Reset()
{
    return m_Generator.Reset();
}

//
ASDCP::SilenceDataProvider::SilenceDataProvider(const ui16_t numChannels, const ui16_t bitsPerSample,
                                                const ui32_t sampleRate, const ASDCP::Rational& editRate)
    : m_ADesc(), m_SampleSize(0)
{
    m_SampleSize = ((bitsPerSample + 7) / 8);
    m_ADesc.EditRate = editRate;
    m_ADesc.AudioSamplingRate = Rational(sampleRate, 1);
    m_ADesc.ChannelCount = numChannels;
    m_ADesc.QuantizationBits = bitsPerSample;
    m_ADesc.BlockAlign = numChannels * m_SampleSize;
    m_ADesc.AvgBps = sampleRate * m_ADesc.BlockAlign;
}

ASDCP::SilenceDataProvider::~SilenceDataProvider()
{}

Result_t
ASDCP::SilenceDataProvider::PutSample(const ui32_t numChannels, byte_t* buf, ui32_t* bytesWritten)
{
  ASDCP_TEST_NULL(buf);
  if ( numChannels > m_ADesc.ChannelCount)
  {
    DefaultLogSink().Error("Requested %u channels from a wav file with %u channel.", numChannels,
                           m_ADesc.ChannelCount);
    return RESULT_FAIL;
  }
  (*bytesWritten) = m_SampleSize * numChannels;
  ::memset(buf, 0, (*bytesWritten));
  return RESULT_OK;
}

Result_t
ASDCP::SilenceDataProvider::ReadFrame()
{
    // no op
    return RESULT_OK;
}

Result_t
ASDCP::SilenceDataProvider::FillAudioDescriptor(PCM::AudioDescriptor& ADesc) const
{
  ADesc = m_ADesc;
  return RESULT_OK;
}

Result_t
ASDCP::SilenceDataProvider::Reset()
{
    //no op
    return RESULT_OK;
}