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/*
* Copyright (C) 2013 Team XBMC
* http://xbmc.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* 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 XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include "DVDInputStreams/DVDInputStream.h"
#include "DVDDemuxCDDA.h"
#include "DVDDemuxUtils.h"
#include "utils/log.h"
#include "../DVDClock.h"
// CDDA audio demuxer based on AirTunes audio Demuxer.
using namespace std;
class CDemuxStreamAudioCDDA
: public CDemuxStreamAudio
{
public:
void GetStreamInfo(string& strInfo)
{
strInfo = "pcm";
}
};
CDVDDemuxCDDA::CDVDDemuxCDDA() : CDVDDemux()
{
m_pInput = NULL;
m_stream = NULL;
m_bytes = 0;
}
CDVDDemuxCDDA::~CDVDDemuxCDDA()
{
Dispose();
}
bool CDVDDemuxCDDA::Open(CDVDInputStream* pInput)
{
Abort();
Dispose();
if(!pInput || !pInput->IsStreamType(DVDSTREAM_TYPE_FILE))
return false;
m_pInput = pInput;
m_stream = new CDemuxStreamAudioCDDA();
if(!m_stream)
return false;
m_stream->iSampleRate = 44100;
m_stream->iBitsPerSample = 16;
m_stream->iBitRate = 44100 * 2 * 16;
m_stream->iChannels = 2;
m_stream->type = STREAM_AUDIO;
m_stream->codec = AV_CODEC_ID_PCM_S16LE;
return true;
}
void CDVDDemuxCDDA::Dispose()
{
delete m_stream;
m_stream = NULL;
m_pInput = NULL;
m_bytes = 0;
}
void CDVDDemuxCDDA::Reset()
{
CDVDInputStream* pInputStream = m_pInput;
Dispose();
Open(pInputStream);
}
void CDVDDemuxCDDA::Abort()
{
if(m_pInput)
return m_pInput->Abort();
}
void CDVDDemuxCDDA::Flush()
{
}
#define CDDA_READ_SIZE 4096
DemuxPacket* CDVDDemuxCDDA::Read()
{
if(!m_pInput)
return NULL;
DemuxPacket* pPacket = CDVDDemuxUtils::AllocateDemuxPacket(CDDA_READ_SIZE);
if (!pPacket)
{
if (m_pInput)
m_pInput->Close();
return NULL;
}
pPacket->iSize = m_pInput->Read(pPacket->pData, CDDA_READ_SIZE);
pPacket->iStreamId = 0;
if(pPacket->iSize < 1)
{
delete pPacket;
pPacket = NULL;
}
else
{
int n = m_stream->iBitRate>>3;
if (n > 0)
{
m_bytes += pPacket->iSize;
pPacket->dts = (double)m_bytes * DVD_TIME_BASE / n;
pPacket->pts = pPacket->dts;
}
else
{
pPacket->dts = DVD_NOPTS_VALUE;
pPacket->pts = DVD_NOPTS_VALUE;
}
}
return pPacket;
}
bool CDVDDemuxCDDA::SeekTime(int time, bool backwords, double* startpts)
{
int bytes_per_second = m_stream->iBitRate>>3;
// clamp seeks to bytes per full sample
int clamp_bytes = (m_stream->iBitsPerSample>>3) * m_stream->iChannels;
// time is in milliseconds
int64_t seekPos = m_pInput->Seek((((int64_t)time * bytes_per_second / 1000) / clamp_bytes ) * clamp_bytes, SEEK_SET) > 0;
if (seekPos > 0)
m_bytes = seekPos;
if (startpts)
*startpts = (double)m_bytes * DVD_TIME_BASE / bytes_per_second;
return seekPos > 0;
};
int CDVDDemuxCDDA::GetStreamLength()
{
int64_t num_track_bytes = m_pInput->GetLength();
int bytes_per_second = (m_stream->iBitRate>>3);
int64_t track_mseconds = num_track_bytes*1000 / bytes_per_second;
return (int)track_mseconds;
}
CDemuxStream* CDVDDemuxCDDA::GetStream(int iStreamId)
{
if(iStreamId != 0)
return NULL;
return m_stream;
}
int CDVDDemuxCDDA::GetNrOfStreams()
{
return (m_stream == NULL ? 0 : 1);
}
std::string CDVDDemuxCDDA::GetFileName()
{
if(m_pInput)
return m_pInput->GetFileName();
else
return "";
}
void CDVDDemuxCDDA::GetStreamCodecName(int iStreamId, std::string &strName)
{
if (m_stream && iStreamId == 0)
strName = "pcm";
}
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