//   rdhpirecordstream.cpp
//
//   A class for recording Microsoft WAV files.
//
//   (C) Copyright 2002-2019 Fred Gleason <fredg@paravelsystems.com>
//
//   This program is free software; you can redistribute it and/or modify
//   it under the terms of the GNU General Public License version 2 as
//   published by the Free Software Foundation.
//
//   This program is distributed in the hope that it will be useful,
//   but WITHOUT ANY WARRANTY; without even the implied warranty of
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//   GNU General Public License for more details.
//
//   You should have received a copy of the GNU General Public
//   License along with this program; if not, write to the Free Software
//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <syslog.h>
#include <fcntl.h>
#include <qobject.h>
#include <qwidget.h>
#include <qstring.h>
#include <qdatetime.h>

#include <rdapplication.h>

#include "rdhpirecordstream.h"

RDHPIRecordStream::RDHPIRecordStream(RDHPISoundCard *card,QWidget *parent) 
  :QObject(parent),RDWaveFile()
{ 
  int quan;
  uint16_t type[HPI_MAX_ADAPTERS];
  struct hpi_format fmt;
  uint32_t dma_size=0;

  if(getenv(DEBUG_VAR)==NULL) {
    debug=false;
  }
  else {
    debug=true;
    printf("RDHPIRecordStream: debugging enabled\n");
  }
  if(getenv(XRUN_VAR)==NULL) {
    xrun=false;
  }
  else {
    xrun=true;
    printf("RDHPIRecordStream: xrun notification enabled\n");
  }

  sound_card=card;

  card_number=-1;
  stream_number=-1;
  is_ready=false;
  is_recording=false;
  is_paused=false;
  stopping=false;
  record_started=false;
  record_length=0;
  is_open=false;
  pdata=NULL;

  //
  // Get Adapter Indices
  //
#if HPI_VER < 0x00030600
  for(unsigned i=0;i<HPI_MAX_ADAPTERS;i++) {
    card_index[i]=i;
  }
#else
  LogHpi(HPI_SubSysGetNumAdapters(NULL,&quan),__LINE__);
  for(int i=0;i<quan;i++) {
    LogHpi(HPI_SubSysGetAdapter(NULL,i,card_index+i,type+i),__LINE__);
  }
#endif  // HPI_VER

  //
  // Calculate DMA Buffer Size
  //
  memset(&fmt,0,sizeof(fmt));  // Worst case situation
  fmt.dwSampleRate=48000;
  fmt.wChannels=2;
  fmt.wFormat=HPI_FORMAT_PCM32_FLOAT;
  if(LogHpi(HPI_StreamEstimateBufferSize(&fmt,RDHPIRECORDSTREAM_CLOCK_INTERVAL,
					 &dma_size),__LINE__)==0) {
    dma_buffer_size=dma_size;
  }

  clock=new QTimer(this);
  connect(clock,SIGNAL(timeout()),this,SLOT(tickClock()));

  length_timer=new QTimer(this);
  connect(length_timer,SIGNAL(timeout()),this,SLOT(pause()));
}


RDHPIRecordStream::~RDHPIRecordStream()
{
  if(pdata!=NULL) {
    delete pdata;
  }
} 


QString RDHPIRecordStream::errorString(RDHPIRecordStream::Error err)
{
  QString str;

  switch(err) {
  case RDHPIRecordStream::Ok:
    return QString(tr("Ok"));
    break;

  case RDHPIRecordStream::NoFile:
    return QString(tr("Unable to create/open file"));
    break;

  case RDHPIRecordStream::NoStream:
    return QString(tr("Input stream unavailable"));
    break;

  case RDHPIRecordStream::AlreadyOpen:
    return QString(tr("Stream is already open"));
    break;

  default:
    str=QString(tr("Unknown RDHpiRecordStream Error:"));
    return QString().sprintf("%s %d\n",(const char *)str,err);
    break;
  }
}


RDHPIRecordStream::Error RDHPIRecordStream::createWave()
{
  if(is_open) {
    return RDHPIRecordStream::AlreadyOpen;
  }
  if(!RDWaveFile::createWave()) {
    return RDHPIRecordStream::NoFile;
  }
  if(!GetStream()) {
    closeWave();
    return RDHPIRecordStream::NoStream;
  }
  is_open=true;
  return RDHPIRecordStream::Ok;
}


RDHPIRecordStream::Error RDHPIRecordStream::createWave(QString filename)
{
  if(is_open) {
    return RDHPIRecordStream::AlreadyOpen;
  }
  setName(filename);
  return createWave();
}


void RDHPIRecordStream::closeWave()
{
  if(!is_open) {
    return;
  }
  if(getState()!=RDHPIRecordStream::Stopped) {
    stop();
  }
  RDWaveFile::closeWave(samples_recorded);
  FreeStream();
  is_open=false;
}


bool RDHPIRecordStream::formatSupported(RDWaveFile::Format format)
{
#if HPI_VER < HPI_VERSION_CONSTRUCTOR(3L,10,0)
  HPI_FORMAT hformat;
#else
  struct hpi_format hformat;
#endif
  hpi_handle_t histream;
  bool found=false;

  if(card_number<0) {
    return false;
  }
  if(format==RDWaveFile::Vorbis) {
#ifdef HAVE_VORBIS
    return true;
#endif  // HAVE_VORBIS
    return false;
  }
  if(!is_open) {
    for(int i=0;i<sound_card->getCardInputStreams(card_number);i++) {
      if(LogHpi(HPI_InStreamOpen(NULL,card_index[card_number],i,&histream),
		__LINE__)==0) {
	found=true;
	break;
      }
    }
    if(!found) {
      return false;
    }
    if(HPI_InStreamHostBufferAllocate(NULL,histream,dma_buffer_size));
  }
  else {
    histream=hpi_stream;
  }
  switch(format) {
  case RDWaveFile::Pcm8:
    LogHpi(HPI_FormatCreate(&hformat,getChannels(),HPI_FORMAT_PCM8_UNSIGNED,
			    getSamplesPerSec(),getHeadBitRate(),0),__LINE__);
    state=LogHpi(HPI_InStreamQueryFormat(NULL,histream,&hformat),__LINE__);
    break;

  case RDWaveFile::Pcm16:
    LogHpi(HPI_FormatCreate(&hformat,getChannels(),HPI_FORMAT_PCM16_SIGNED,
			    getSamplesPerSec(),getHeadBitRate(),0),__LINE__);
    state=LogHpi(HPI_InStreamQueryFormat(NULL,histream,&hformat),__LINE__);
    break;

  case RDWaveFile::Pcm24:
    LogHpi(HPI_FormatCreate(&hformat,getChannels(),HPI_FORMAT_PCM24_SIGNED,
			    getSamplesPerSec(),getHeadBitRate(),0),__LINE__);
    state=LogHpi(HPI_InStreamQueryFormat(NULL,histream,&hformat),__LINE__);
    break;

  case RDWaveFile::MpegL1:
    LogHpi(HPI_FormatCreate(&hformat,getChannels(),HPI_FORMAT_MPEG_L1,
			    getSamplesPerSec(),getHeadBitRate(),0),__LINE__);
    state=LogHpi(HPI_InStreamQueryFormat(NULL,histream,&hformat),__LINE__);
    break;

  case RDWaveFile::MpegL2:
    LogHpi(HPI_FormatCreate(&hformat,getChannels(),HPI_FORMAT_MPEG_L2,
			    getSamplesPerSec(),getHeadBitRate(),0),__LINE__);
    state=LogHpi(HPI_InStreamQueryFormat(NULL,histream,&hformat),__LINE__);
    break;

  case RDWaveFile::MpegL3:
    LogHpi(HPI_FormatCreate(&hformat,getChannels(),HPI_FORMAT_MPEG_L3,
			    getSamplesPerSec(),getHeadBitRate(),0),__LINE__);
    state=LogHpi(HPI_InStreamQueryFormat(NULL,histream,&hformat),__LINE__);
    break;

  default:
    state=1;
    break;
  }
  if(!is_open) {
    if(HPI_InStreamHostBufferFree(NULL,histream));
    LogHpi(HPI_InStreamClose(NULL,histream),__LINE__);
  }
  if(state!=0) {
    return false;
  }
  return true;
}


bool RDHPIRecordStream::formatSupported()
{
  switch(getFormatTag()) {
  case WAVE_FORMAT_PCM:
    switch(getBitsPerSample()) {
    case 8:
      return formatSupported(RDWaveFile::Pcm8);
      break;

    case 16:
      return formatSupported(RDWaveFile::Pcm16);
      break;

    case 24:
      return formatSupported(RDWaveFile::Pcm24);
      break;

    default:
      return false;
    }
    break;

  case WAVE_FORMAT_MPEG:
    switch(getHeadLayer()) {
    case 1:
      return formatSupported(RDWaveFile::MpegL1);
      break;

    case 2:
      return formatSupported(RDWaveFile::MpegL2);
      break;

    case 3:
      return formatSupported(RDWaveFile::MpegL3);
      break;

    default:
      return false;
    }
    break;

  default:
    return false;
  }
}


int RDHPIRecordStream::getCard() const
{
  return card_number;
}


void RDHPIRecordStream::setCard(int card)
{
  if(!is_recording) {
    card_number=card;
    if(debug) {
      printf("RDHPIRecordStream: using card %d\n",card_number);
    }
  }
}


int RDHPIRecordStream::getStream() const
{
  return stream_number;
}


void RDHPIRecordStream::setStream(int stream)
{
  stream_number=stream;
}


bool RDHPIRecordStream::haveInputVOX() const
{
  return sound_card->haveInputStreamVOX(card_number,stream_number);
}


RDHPIRecordStream::RecordState RDHPIRecordStream::getState()
{
  if(is_recording) {
    if(record_started) {
      return RDHPIRecordStream::RecordStarted;
    }
    return RDHPIRecordStream::Recording;
  }
  if(is_paused) {
    return RDHPIRecordStream::Paused;
  }
  if(is_ready) {
    return RDHPIRecordStream::RecordReady;
  }
  return RDHPIRecordStream::Stopped;
}


int RDHPIRecordStream::getPosition() const
{
  if((!is_recording)&&(!is_ready)&&(!is_paused)) {
    return 0;
  }
  return samples_recorded;
}


unsigned RDHPIRecordStream::samplesRecorded() const
{
  return samples_recorded;
}


bool RDHPIRecordStream::recordReady()
{
  hpi_err_t hpi_error=0;
  char hpi_text[200];

  if(debug) {
    printf("RDHPIRecordStream: received recordReady()\n");
  }
  if(!is_open) {
    return false;
  }
  if((!is_recording)&&(!is_paused)) {
    resetWave();
    if(LogHpi(HPI_InStreamGetInfoEx(NULL,hpi_stream,
				    &state,&buffer_size,&data_recorded,
				    &samples_recorded,&reserved),__LINE__)!=0) {
      if(debug) {
	printf("RDHPIRecordStream: HPI_InStreamGetInfoEx() failed\n");
      }
      return false;
    }
    fragment_size=buffer_size/4;
    if(fragment_size>192000) {  // ALSA Compatibility Limitation
      fragment_size=192000;
    }
    fragment_time=(1000*fragment_size)/(getAvgBytesPerSec());
    if(pdata!=NULL) {
      delete pdata;
    }
    pdata=(uint8_t *)malloc(fragment_size);
    if(pdata==NULL) {
      if(debug) {
	printf("RDHPIRecordStream: couldn't allocate buffer\n");
      }
      return false;
    }
    switch(getFormatTag()) {
    case WAVE_FORMAT_PCM:
      if(debug) {
	printf("RDHPIRecordStream: using PCM%d format\n",
	       getBitsPerSample());
      }
      switch(getBitsPerSample()) {
      case 8:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_PCM8_UNSIGNED,
					  getSamplesPerSec(),0,0),__LINE__);
	break;

      case 16:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_PCM16_SIGNED,
					  getSamplesPerSec(),0,0),__LINE__);
	break;

      case 24:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_PCM24_SIGNED,
					  getSamplesPerSec(),0,0),__LINE__);
	break;

      case 32:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_PCM32_SIGNED,
					  getSamplesPerSec(),0,0),__LINE__);
	break;

      default:
	if(debug) {
	  printf("RDHPIRecordStream: unsupported sample size\n");
	}
	return false;
      }
      break;

    case WAVE_FORMAT_MPEG:
      if(debug) {
	printf("RDHPIRecordStream: using MPEG-1 Layer %d\n",getHeadLayer());
      }
      switch(getHeadLayer()) {
      case 1:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_MPEG_L1,getSamplesPerSec(),
					  getHeadBitRate(),getHeadFlags()),
			 __LINE__);
	break;

      case 2:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_MPEG_L2,getSamplesPerSec(),
					  getHeadBitRate(),getHeadFlags()),
			 __LINE__);
	break;

      case 3:
	hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					  HPI_FORMAT_MPEG_L3,getSamplesPerSec(),
					  getHeadBitRate(),getHeadFlags()),
			 __LINE__);
	break;

      default:
	hpi_error=LogHpi(HPI_AdapterClose(NULL,card_index[card_number]),
			 __LINE__);
	if(debug) {
	  printf("RDHPIRecordStream: invalid MPEG-1 layer\n");
	}
	return false;
      }
      if(getMextChunk()) {
	setMextHomogenous(true);
	setMextPaddingUsed(false);
	setMextHackedBitRate(true);
	setMextFreeFormat(false);
	setMextFrameSize(144*getHeadBitRate()/getSamplesPerSec());
	setMextAncillaryLength(5);
	setMextLeftEnergyPresent(true);
	if(getChannels()>1) {
	  setMextRightEnergyPresent(true);
	}
	else {
	  setMextRightEnergyPresent(false);
	}
	setMextPrivateDataPresent(false);
      }
      break;

    case WAVE_FORMAT_VORBIS:
      if(debug) {
	printf("RDHPIRecordStream: using OggVorbis\n");
      }
      hpi_error=LogHpi(HPI_FormatCreate(&format,getChannels(),
					HPI_FORMAT_PCM16_SIGNED,
					getSamplesPerSec(),0,0),__LINE__);
      break;

    default:
      if(debug) {
	printf("RDHPIRecordStream: invalid format tag\n");
      }
      return false;
      break;
    }
    if((hpi_error=LogHpi(HPI_InStreamQueryFormat(NULL,hpi_stream,
						 &format),__LINE__))!=0) {
      if(debug) {
	HPI_GetErrorText(hpi_error,hpi_text);
	printf("Num: %d\n",hpi_error);
	printf("RDHPIRecordStream: %s\n",hpi_text);
      }
      return false;
    }
  }
#if HPI_VER < 0x00030500
  LogHpi(HPI_DataCreate(&hpi_data,&format,pdata,fragment_size),__LINE__);
#endif
  hpi_error=LogHpi(HPI_InStreamSetFormat(NULL,hpi_stream,&format),__LINE__);
  hpi_error=LogHpi(HPI_InStreamStart(NULL,hpi_stream),__LINE__);
//  clock->start(2*fragment_time/3);
  clock->start(RDHPIRECORDSTREAM_CLOCK_INTERVAL);
  is_ready=true;
  is_recording=false;
  is_paused=false;
  stopping=false;
  emit isStopped(false);
  emit ready();
  emit stateChanged(card_number,stream_number,1);  // RecordReady
  if(debug) {
    printf("RDHPIRecordStream: emitted isStopped(false)\n");
    printf("RDHPIRecordStream: emitted ready()\n");
    printf("RDHPIRecordStream: emitted stateChanged(%d,%d,RDHPIRecordStream::RecordReady)\n",card_number,stream_number);
  }

  return true;
}


void RDHPIRecordStream::record()
{
  if(debug) {
    printf("RDHPIRecordStream: received record()\n");
  }
  if(!is_open) {
    return;
  }
  if(!is_ready) {
    recordReady();
  }
  record_started=false;
  LogHpi(HPI_InStreamReset(NULL,hpi_stream),__LINE__);
  LogHpi(HPI_InStreamStart(NULL,hpi_stream),__LINE__);
  is_recording=true;
  is_paused=false;
  emit isStopped(false);
  emit recording();
  emit stateChanged(card_number,stream_number,0);  // Recording
  if(debug) {
    printf("RDHPIRecordStream: emitted isStopped(false)\n");
    printf("RDHPIRecordStream: emitted recording()\n");
    printf("RDHPIRecordStream: emitted stateChanged(%d,%d,RDHPIRecordStream::Recording)\n",card_number,stream_number);
  }
  tickClock();
}


void RDHPIRecordStream::pause()
{
  if(debug) {
    printf("RDHPIRecordStream: received pause()\n");
  }
  if(!is_recording) {
    return;
  }
  LogHpi(HPI_InStreamStop(NULL,hpi_stream),__LINE__);
  tickClock();
  LogHpi(HPI_InStreamGetInfoEx(NULL,hpi_stream,&state,&buffer_size,
			       &data_recorded,&samples_recorded,&reserved),
	 __LINE__);
  is_recording=false;
  is_paused=true;
  LogHpi(HPI_InStreamStart(NULL,hpi_stream),__LINE__);
  emit paused();
  emit stateChanged(card_number,stream_number,2);  // Paused
  if(debug) {
    printf("RDHPIRecordStream: emitted paused()\n");
    printf("RDHPIRecordStream: emitted stateChanged(%d,%d,RDHPIRecordStream::Paused)\n",card_number,stream_number);
  }
}


void RDHPIRecordStream::stop()
{
  if(debug) {
    printf("RDHPIRecordStream: received stop()\n");
  }
  if(is_ready|is_recording|is_paused) {
    LogHpi(HPI_InStreamStop(NULL,hpi_stream),__LINE__);
    tickClock();
    clock->stop();
    is_recording=false;
    is_paused=false;
    is_ready=false;
    if(pdata!=NULL) {
      delete pdata;
      pdata=NULL;
    }
    emit isStopped(true);
    emit stopped();
    emit stateChanged(card_number,stream_number,RDHPIRecordStream::Stopped);
    emit position(0);
    if(debug) {
      printf("RDHPIRecordStream: emitted isStopped(true)\n");
      printf("RDHPIRecordStream: emitted stopped()\n");
      printf("RDHPIRecordStream: emitted stateChanged(%d,%d,RDHPIRecordStream::Stopped)\n",card_number,stream_number);
      printf("RDHPIRecordStream: emitted position(0)\n");
    }
  }
}


void RDHPIRecordStream::setInputVOX(int gain)
{
  sound_card->setInputStreamVOX(card_number,stream_number,gain);
}


void RDHPIRecordStream::setRecordLength(int length)
{
  record_length=length;
}


void RDHPIRecordStream::tickClock()
{
  LogHpi(HPI_InStreamGetInfoEx(NULL,hpi_stream,
			       &state,&buffer_size,&data_recorded,
			       &samples_recorded,&reserved),__LINE__);
  if((!record_started)&&(is_recording)) {
    if(samples_recorded>0) {
      if(record_length>0) {
        length_timer->start(record_length,true);
      }
      emit recordStart();
      emit stateChanged(card_number,stream_number,4);  // RecordStarted
      if(debug) {
	printf("RDHPIRecordStream: emitted recordStart()\n");
	printf("RDHPIRecordStream: emitted stateChanged(%d,%d,RDHPIRecordStream::RecordStarted)\n",card_number,stream_number);
      }
      record_started=true;
    }
  }
  while(data_recorded>fragment_size) {
#if HPI_VER > 0x00030500
    LogHpi(HPI_InStreamReadBuf(NULL,hpi_stream,pdata,fragment_size),__LINE__);
#else
    LogHpi(HPI_InStreamRead(NULL,hpi_stream,&hpi_data),__LINE__);
#endif
    if(is_recording) {
      writeWave(pdata,fragment_size);
    }
    LogHpi(HPI_InStreamGetInfoEx(NULL,hpi_stream,&state,&buffer_size,
				 &data_recorded,&samples_recorded,&reserved),
	   __LINE__);
  }
  if(state==HPI_STATE_STOPPED) {
#if HPI_VER > 0x00030500
    LogHpi(HPI_InStreamReadBuf(NULL,hpi_stream,pdata,data_recorded),__LINE__);
#else
    LogHpi(HPI_DataCreate(&hpi_data,&format,pdata,data_recorded),__LINE__);
    LogHpi(HPI_InStreamRead(NULL,hpi_stream,&hpi_data),__LINE__);
#endif
    if(is_recording) {
      writeWave(pdata,data_recorded);
    }
  }
  emit position(samples_recorded);
  if(debug) {
    printf("RDHPIRecordStream: emitted position(%u)\n",
	   (unsigned)samples_recorded);
  }
}


bool RDHPIRecordStream::GetStream()
{
  hpi_err_t hpi_err;
  char hpi_text[100];

  if((hpi_err=
      LogHpi(HPI_InStreamOpen(NULL,card_index[card_number],stream_number,
			      &hpi_stream),__LINE__))!=0) {
    if(debug) {
      HPI_GetErrorText(hpi_err,hpi_text);
      fprintf(stderr,"*** HPI Error: %s ***\n",hpi_text);
    }
    return false;
  }
  if(HPI_InStreamHostBufferAllocate(NULL,hpi_stream,dma_buffer_size));

  return true;
}


void RDHPIRecordStream::FreeStream()
{
  if(HPI_InStreamHostBufferFree(NULL,hpi_stream));
  LogHpi(HPI_InStreamClose(NULL,hpi_stream),__LINE__);
}


hpi_err_t RDHPIRecordStream::LogHpi(hpi_err_t err,int lineno)
{
  char err_txt[200];

  if(err!=0) {
    HPI_GetErrorText(err,err_txt);
    RDApplication::syslog(sound_card->config(),LOG_WARNING,
			  "HPI Error: %s, %s line %d",err_txt,__FILE__,lineno);
  }
  return err;
}