/*
Copyright (C) 2009 Grame

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 of the License, 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "driver_interface.h"
#include "JackThreadedDriver.h"
#include "JackDriverLoader.h"
#include "JackBoomerDriver.h"
#include "JackEngineControl.h"
#include "JackGraphManager.h"
#include "JackError.h"
#include "JackTime.h"
#include "JackShmMem.h"
#include "JackGlobals.h"
#include "memops.h"

#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <fcntl.h>
#include <iostream>
#include <assert.h>
#include <stdio.h>

using namespace std;

namespace Jack
{

#ifdef JACK_MONITOR

#define CYCLE_POINTS 500000

struct OSSCycle {
    jack_time_t fBeforeRead;
    jack_time_t fAfterRead;
    jack_time_t fAfterReadConvert;
    jack_time_t fBeforeWrite;
    jack_time_t fAfterWrite;
    jack_time_t fBeforeWriteConvert;
};

struct OSSCycleTable {
    jack_time_t fBeforeFirstWrite;
    jack_time_t fAfterFirstWrite;
    OSSCycle fTable[CYCLE_POINTS];
};

OSSCycleTable gCycleTable;
int gCycleReadCount = 0;
int gCycleWriteCount = 0;

#endif

inline int int2pow2(int x)	{ int r = 0; while ((1 << r) < x) r++; return r; }

static inline void CopyAndConvertIn(jack_sample_t *dst, void *src, size_t nframes, int channel, int byte_skip, int bits)
{
    switch (bits) {

		case 16: {
		    signed short *s16src = (signed short*)src;
            s16src += channel;
            sample_move_dS_s16(dst, (char*)s16src, nframes, byte_skip);
			break;
        }
		case 24: {
			signed int *s32src = (signed int*)src;
            s32src += channel;
            sample_move_dS_s24(dst, (char*)s32src, nframes, byte_skip);
			break;
        }
		case 32: {
			signed int *s32src = (signed int*)src;
            s32src += channel;
            sample_move_dS_s32u24(dst, (char*)s32src, nframes, byte_skip);
			break;
        }
	}
}

static inline void CopyAndConvertOut(void *dst, jack_sample_t *src, size_t nframes, int channel, int byte_skip, int bits)
{
	switch (bits) {

		case 16: {
			signed short *s16dst = (signed short*)dst;
            s16dst += channel;
            sample_move_d16_sS((char*)s16dst, src, nframes, byte_skip, NULL); // No dithering for now...
			break;
        }
		case 24: {
			signed int *s32dst = (signed int*)dst;
            s32dst += channel;
            sample_move_d24_sS((char*)s32dst, src, nframes, byte_skip, NULL); 
			break;
        }    
		case 32: {
            signed int *s32dst = (signed int*)dst;
            s32dst += channel;
            sample_move_d32u24_sS((char*)s32dst, src, nframes, byte_skip, NULL);
			break;  
        }
	}
}

void JackBoomerDriver::SetSampleFormat()
{
    switch (fBits) {

	    case 24:	/* native-endian LSB aligned 24-bits in 32-bits integer */
            fSampleFormat = AFMT_S24_NE;
            fSampleSize = 4;
			break;
		case 32:	/* native-endian 32-bit integer */
            fSampleFormat = AFMT_S32_NE; 
            fSampleSize = 4;
			break;
		case 16:	/* native-endian 16-bit integer */
		default:
            fSampleFormat = AFMT_S16_NE;
            fSampleSize = 2;
			break;
    }
}

void JackBoomerDriver::DisplayDeviceInfo()
{
    audio_buf_info info;
    oss_audioinfo ai_in, ai_out;
    memset(&info, 0, sizeof(audio_buf_info));
    int cap = 0;
    
    // Duplex cards : http://manuals.opensound.com/developer/full_duplex.html
    jack_info("Audio Interface Description :");
    jack_info("Sampling Frequency : %d, Sample Format : %d, Mode : %d", fEngineControl->fSampleRate, fSampleFormat, fRWMode);
    
    if (fRWMode & kWrite) {
	
        oss_sysinfo si;
        if (ioctl(fOutFD, OSS_SYSINFO, &si) == -1) {
            jack_error("JackBoomerDriver::DisplayDeviceInfo OSS_SYSINFO failed : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        } else {
            jack_info("OSS product %s", si.product);
            jack_info("OSS version %s", si.version);
            jack_info("OSS version num %d", si.versionnum);
            jack_info("OSS numaudios %d", si.numaudios);
            jack_info("OSS numaudioengines %d", si.numaudioengines);
            jack_info("OSS numcards %d", si.numcards);
        }
	
        jack_info("Output capabilities - %d channels : ", fPlaybackChannels);
        jack_info("Output block size = %d", fOutputBufferSize);
    
        if (ioctl(fOutFD, SNDCTL_DSP_GETOSPACE, &info) == -1)  {
            jack_error("JackBoomerDriver::DisplayDeviceInfo SNDCTL_DSP_GETOSPACE failed : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        } else {
            jack_info("output space info: fragments = %d, fragstotal = %d, fragsize = %d, bytes = %d", 
                info.fragments, info.fragstotal, info.fragsize, info.bytes);
            fFragmentSize = info.fragsize;
        }
    
        if (ioctl(fOutFD, SNDCTL_DSP_GETCAPS, &cap) == -1)  {
            jack_error("JackBoomerDriver::DisplayDeviceInfo SNDCTL_DSP_GETCAPS failed : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        } else {
            if (cap & DSP_CAP_DUPLEX) 	jack_info(" DSP_CAP_DUPLEX");
            if (cap & DSP_CAP_REALTIME) jack_info(" DSP_CAP_REALTIME");
            if (cap & DSP_CAP_BATCH) 	jack_info(" DSP_CAP_BATCH");
            if (cap & DSP_CAP_COPROC) 	jack_info(" DSP_CAP_COPROC");
            if (cap & DSP_CAP_TRIGGER)  jack_info(" DSP_CAP_TRIGGER");
            if (cap & DSP_CAP_MMAP) 	jack_info(" DSP_CAP_MMAP");
            if (cap & DSP_CAP_MULTI) 	jack_info(" DSP_CAP_MULTI");
            if (cap & DSP_CAP_BIND) 	jack_info(" DSP_CAP_BIND");
        }
    }	
    
    if (fRWMode & kRead) {
    
      	oss_sysinfo si;
        if (ioctl(fInFD, OSS_SYSINFO, &si) == -1) {
            jack_error("JackBoomerDriver::DisplayDeviceInfo OSS_SYSINFO failed : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        } else {
            jack_info("OSS product %s", si.product);
            jack_info("OSS version %s", si.version);
            jack_info("OSS version num %d", si.versionnum);
            jack_info("OSS numaudios %d", si.numaudios);
            jack_info("OSS numaudioengines %d", si.numaudioengines);
            jack_info("OSS numcards %d", si.numcards);
        }
    
        jack_info("Input capabilities - %d channels : ", fCaptureChannels);
        jack_info("Input block size = %d", fInputBufferSize);
    
        if (ioctl(fInFD, SNDCTL_DSP_GETISPACE, &info) == -1) { 
            jack_error("JackBoomerDriver::DisplayDeviceInfo SNDCTL_DSP_GETOSPACE failed : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        } else {
            jack_info("input space info: fragments = %d, fragstotal = %d, fragsize = %d, bytes = %d", 
                info.fragments, info.fragstotal, info.fragsize, info.bytes);
        }

        if (ioctl(fInFD, SNDCTL_DSP_GETCAPS, &cap) == -1) {
            jack_error("JackBoomerDriver::DisplayDeviceInfo SNDCTL_DSP_GETCAPS failed : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        } else {
            if (cap & DSP_CAP_DUPLEX) 	jack_info(" DSP_CAP_DUPLEX");
            if (cap & DSP_CAP_REALTIME) jack_info(" DSP_CAP_REALTIME");
            if (cap & DSP_CAP_BATCH) 	jack_info(" DSP_CAP_BATCH");
            if (cap & DSP_CAP_COPROC) 	jack_info(" DSP_CAP_COPROC");
            if (cap & DSP_CAP_TRIGGER)  jack_info(" DSP_CAP_TRIGGER");
            if (cap & DSP_CAP_MMAP) 	jack_info(" DSP_CAP_MMAP");
            if (cap & DSP_CAP_MULTI) 	jack_info(" DSP_CAP_MULTI");
            if (cap & DSP_CAP_BIND) 	jack_info(" DSP_CAP_BIND");
        }
    }
     
    if (ai_in.rate_source != ai_out.rate_source) {
        jack_info("Warning : input and output are not necessarily driven by the same clock!");
    }
}

JackBoomerDriver::JackBoomerDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
                : JackAudioDriver(name, alias, engine, table),
                fInFD(-1), fOutFD(-1), fBits(0), 
                fSampleFormat(0), fNperiods(0), fSampleSize(0), fFragmentSize(0),
                fRWMode(0), fExcl(false), fSyncIO(false),
                fInputBufferSize(0), fOutputBufferSize(0),
                fInputBuffer(NULL), fOutputBuffer(NULL),
                fInputThread(&fInputHandler), fOutputThread(&fOutputHandler),
                fInputHandler(this), fOutputHandler(this)
               
{
    sem_init(&fReadSema, 0, 0); 
    sem_init(&fWriteSema, 0, 0); 
}

JackBoomerDriver::~JackBoomerDriver()
{
    sem_destroy(&fReadSema); 
    sem_destroy(&fWriteSema); 
}

int JackBoomerDriver::OpenInput()
{
    int flags = 0;
    int gFragFormat;
    int cur_capture_channels;
    int cur_sample_format;
    jack_nframes_t cur_sample_rate;

    if (fCaptureChannels == 0) fCaptureChannels = 2;
  
    if ((fInFD = open(fCaptureDriverName, O_RDONLY | ((fExcl) ? O_EXCL : 0))) < 0) {
        jack_error("JackBoomerDriver::OpenInput failed to open device : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        return -1;
    }

    jack_log("JackBoomerDriver::OpenInput input fInFD = %d", fInFD);

    if (fExcl) {
        if (ioctl(fInFD, SNDCTL_DSP_COOKEDMODE, &flags) == -1) {
            jack_error("JackBoomerDriver::OpenInput failed to set cooked mode : %s@%i, errno = %d", __FILE__, __LINE__, errno);
            goto error;
        }
    }

    gFragFormat = (2 << 16) + int2pow2(fEngineControl->fBufferSize * fSampleSize * fCaptureChannels);	
    if (ioctl(fInFD, SNDCTL_DSP_SETFRAGMENT, &gFragFormat) == -1) {
        jack_error("JackBoomerDriver::OpenInput failed to set fragments : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }

    cur_sample_format = fSampleFormat;
    if (ioctl(fInFD, SNDCTL_DSP_SETFMT, &fSampleFormat) == -1) {
        jack_error("JackBoomerDriver::OpenInput failed to set format : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
    if (cur_sample_format != fSampleFormat) {
        jack_info("JackBoomerDriver::OpenInput driver forced the sample format %ld", fSampleFormat);
    }
    
    cur_capture_channels = fCaptureChannels;
    if (ioctl(fInFD, SNDCTL_DSP_CHANNELS, &fCaptureChannels) == -1) {
        jack_error("JackBoomerDriver::OpenInput failed to set channels : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
    if (cur_capture_channels != fCaptureChannels) {
        jack_info("JackBoomerDriver::OpenInput driver forced the number of capture channels %ld", fCaptureChannels);
    }
       
    cur_sample_rate = fEngineControl->fSampleRate;
    if (ioctl(fInFD, SNDCTL_DSP_SPEED, &fEngineControl->fSampleRate) == -1) {
        jack_error("JackBoomerDriver::OpenInput failed to set sample rate : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
    if (cur_sample_rate != fEngineControl->fSampleRate) {
        jack_info("JackBoomerDriver::OpenInput driver forced the sample rate %ld", fEngineControl->fSampleRate);
    }

    // Just set the read size to the value we want...
    fInputBufferSize = fEngineControl->fBufferSize * fSampleSize * fCaptureChannels;

    fInputBuffer = (void*)calloc(fInputBufferSize, 1);
    assert(fInputBuffer);
    return 0;
    
error:
    ::close(fInFD);
    return -1;
}

int JackBoomerDriver::OpenOutput()
{
    int flags = 0;
    int gFragFormat;
    int cur_sample_format;
    int cur_playback_channels;
    jack_nframes_t cur_sample_rate;

    if (fPlaybackChannels == 0) fPlaybackChannels = 2;
    
    if ((fOutFD = open(fPlaybackDriverName, O_WRONLY | ((fExcl) ? O_EXCL : 0))) < 0) {
       jack_error("JackBoomerDriver::OpenOutput failed to open device : %s@%i, errno = %d", __FILE__, __LINE__, errno);
       return -1;
    }

    jack_log("JackBoomerDriver::OpenOutput output fOutFD = %d", fOutFD);
    
    if (fExcl) {
        if (ioctl(fOutFD, SNDCTL_DSP_COOKEDMODE, &flags) == -1) {
            jack_error("JackBoomerDriver::OpenOutput failed to set cooked mode : %s@%i, errno = %d", __FILE__, __LINE__, errno);
            goto error;
        }  
    } 

    gFragFormat = (2 << 16) + int2pow2(fEngineControl->fBufferSize * fSampleSize * fPlaybackChannels);	
    if (ioctl(fOutFD, SNDCTL_DSP_SETFRAGMENT, &gFragFormat) == -1) {
        jack_error("JackBoomerDriver::OpenOutput failed to set fragments : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
   
    cur_sample_format = fSampleFormat;
    if (ioctl(fOutFD, SNDCTL_DSP_SETFMT, &fSampleFormat) == -1) {
        jack_error("JackBoomerDriver::OpenOutput failed to set format : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
    if (cur_sample_format != fSampleFormat) {
        jack_info("JackBoomerDriver::OpenOutput driver forced the sample format %ld", fSampleFormat);
    }
    
    cur_playback_channels = fPlaybackChannels;
    if (ioctl(fOutFD, SNDCTL_DSP_CHANNELS, &fPlaybackChannels) == -1) {
        jack_error("JackBoomerDriver::OpenOutput failed to set channels : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
    if (cur_playback_channels != fPlaybackChannels) {
        jack_info("JackBoomerDriver::OpenOutput driver forced the number of playback channels %ld", fPlaybackChannels);
    }

    cur_sample_rate = fEngineControl->fSampleRate;
    if (ioctl(fOutFD, SNDCTL_DSP_SPEED, &fEngineControl->fSampleRate) == -1) {
        jack_error("JackBoomerDriver::OpenOutput failed to set sample rate : %s@%i, errno = %d", __FILE__, __LINE__, errno);
        goto error;
    }
    if (cur_sample_rate != fEngineControl->fSampleRate) {
        jack_info("JackBoomerDriver::OpenInput driver forced the sample rate %ld", fEngineControl->fSampleRate);
    }

    // Just set the write size to the value we want...
    fOutputBufferSize = fEngineControl->fBufferSize * fSampleSize * fPlaybackChannels;
    
    fOutputBuffer = (void*)calloc(fOutputBufferSize, 1);
    assert(fOutputBuffer);
    return 0;
    
error:
    ::close(fOutFD);
    return -1;
}

int JackBoomerDriver::Open(jack_nframes_t nframes,
                      int user_nperiods, 
                      jack_nframes_t samplerate,
                      bool capturing,
                      bool playing,
                      int inchannels,
                      int outchannels,
                      bool excl,
                      bool monitor,
                      const char* capture_driver_uid,
                      const char* playback_driver_uid,
                      jack_nframes_t capture_latency,
                      jack_nframes_t playback_latency,
                      int bits, bool syncio)
{
    // Generic JackAudioDriver Open
    if (JackAudioDriver::Open(nframes, samplerate, capturing, playing, inchannels, outchannels, monitor, 
        capture_driver_uid, playback_driver_uid, capture_latency, playback_latency) != 0) {
        return -1;
    } else {

        if (!fEngineControl->fSyncMode) {
            jack_error("Cannot run in asynchronous mode, use the -S parameter for jackd");
            return -1;
        }

        fRWMode |= ((capturing) ? kRead : 0);
        fRWMode |= ((playing) ? kWrite : 0);
        fBits = bits;
        fExcl = excl;
        fNperiods = (user_nperiods == 0) ? 1 : user_nperiods ;
        fSyncIO = syncio;
   
    #ifdef JACK_MONITOR
        // Force memory page in
        memset(&gCycleTable, 0, sizeof(gCycleTable));
    #endif
        
        if (OpenAux() < 0) {
            Close();
            return -1;
        } else {
            return 0;
        }
    }
}

int JackBoomerDriver::Close()
{
 #ifdef JACK_MONITOR
    FILE* file = fopen("OSSProfiling.log", "w");
    
    if (file) {
        jack_info("Writing OSS driver timing data....");
        for (int i = 1; i < std::min(gCycleReadCount, gCycleWriteCount); i++) {
            int d1 = gCycleTable.fTable[i].fAfterRead - gCycleTable.fTable[i].fBeforeRead;
            int d2 = gCycleTable.fTable[i].fAfterReadConvert - gCycleTable.fTable[i].fAfterRead;
            int d3 = gCycleTable.fTable[i].fAfterWrite - gCycleTable.fTable[i].fBeforeWrite;
            int d4 = gCycleTable.fTable[i].fBeforeWrite - gCycleTable.fTable[i].fBeforeWriteConvert;     
            fprintf(file, "%d \t %d \t %d \t %d \t \n", d1, d2, d3, d4);
        }
        fclose(file);
    } else {
        jack_error("JackBoomerDriver::Close : cannot open OSSProfiling.log file");
    }

    file = fopen("TimingOSS.plot", "w");

    if (file == NULL) {
        jack_error("JackBoomerDriver::Close cannot open TimingOSS.plot file");
    } else {
        
        fprintf(file, "set grid\n");
        fprintf(file, "set title \"OSS audio driver timing\"\n");
        fprintf(file, "set xlabel \"audio cycles\"\n");
        fprintf(file, "set ylabel \"usec\"\n");
        fprintf(file, "plot \"OSSProfiling.log\" using 1 title \"Driver read wait\" with lines, \
                            \"OSSProfiling.log\" using 2 title \"Driver read convert duration\" with lines, \
                            \"OSSProfiling.log\" using 3 title \"Driver write wait\" with lines, \
                            \"OSSProfiling.log\" using 4 title \"Driver write convert duration\" with lines\n");
    
        fprintf(file, "set output 'TimingOSS.pdf\n");
        fprintf(file, "set terminal pdf\n");
    
        fprintf(file, "set grid\n");
        fprintf(file, "set title \"OSS audio driver timing\"\n");
        fprintf(file, "set xlabel \"audio cycles\"\n");
        fprintf(file, "set ylabel \"usec\"\n");
        fprintf(file, "plot \"OSSProfiling.log\" using 1 title \"Driver read wait\" with lines, \
                            \"OSSProfiling.log\" using 2 title \"Driver read convert duration\" with lines, \
                            \"OSSProfiling.log\" using 3 title \"Driver write wait\" with lines, \
                            \"OSSProfiling.log\" using 4 title \"Driver write convert duration\" with lines\n");
      
        fclose(file);
    }
 #endif
    int res = JackAudioDriver::Close();
    CloseAux();    
    return res;
}

int JackBoomerDriver::OpenAux()
{
    SetSampleFormat();

    if ((fRWMode & kRead) && (OpenInput() < 0)) {
        return -1;
    }
  
    if ((fRWMode & kWrite) && (OpenOutput() < 0)) { 
        return -1;
    }
    
    DisplayDeviceInfo();  
    return 0;
}

void JackBoomerDriver::CloseAux()
{
    if (fRWMode & kRead && fInFD >= 0) {
        close(fInFD);
        fInFD = -1;
    }
    
    if (fRWMode & kWrite && fOutFD >= 0) {
        close(fOutFD);
        fOutFD = -1;
    }
    
    if (fInputBuffer)
        free(fInputBuffer);
    fInputBuffer = NULL;
    
    if (fOutputBuffer)
        free(fOutputBuffer);
    fOutputBuffer = NULL;
}

int JackBoomerDriver::Start()
{
    jack_log("JackBoomerDriver::Start");
    JackAudioDriver::Start();

    // Input/output synchronisation 
    if (fInFD >= 0 && fOutFD >= 0 && fSyncIO) {

        jack_log("JackBoomerDriver::Start sync input/output"); 

        // Create and fill synch group
        int id;
        oss_syncgroup group;
        group.id = 0;
  
        group.mode = PCM_ENABLE_INPUT;
        if (ioctl(fInFD, SNDCTL_DSP_SYNCGROUP, &group) == -1) 
            jack_error("JackBoomerDriver::Start failed to use SNDCTL_DSP_SYNCGROUP : %s@%i, errno = %d", __FILE__, __LINE__, errno);
   
        group.mode = PCM_ENABLE_OUTPUT;
        if (ioctl(fOutFD, SNDCTL_DSP_SYNCGROUP, &group) == -1) 
            jack_error("JackBoomerDriver::Start failed to use SNDCTL_DSP_SYNCGROUP : %s@%i, errno = %d", __FILE__, __LINE__, errno);

        // Prefill output buffer : 2 fragments of silence as described in http://manuals.opensound.com/developer/synctest.c.html#LOC6
        char* silence_buf = (char*)malloc(fFragmentSize);
        memset(silence_buf, 0, fFragmentSize);

        jack_log ("JackBoomerDriver::Start prefill size = %d", fFragmentSize); 

        for (int i = 0; i < 2; i++) {
            ssize_t count = ::write(fOutFD, silence_buf, fFragmentSize);
            if (count < (int)fFragmentSize) {
                jack_error("JackBoomerDriver::Start error bytes written = %ld", count);
            }
        }

        free(silence_buf);

        // Start input/output in sync
        id = group.id;

        if (ioctl(fInFD, SNDCTL_DSP_SYNCSTART, &id) == -1) 
            jack_error("JackBoomerDriver::Start failed to use SNDCTL_DSP_SYNCSTART : %s@%i, errno = %d", __FILE__, __LINE__, errno);

    } else if (fOutFD >= 0) {
        
        // Maybe necessary to write an empty output buffer first time : see http://manuals.opensound.com/developer/fulldup.c.html   
        memset(fOutputBuffer, 0, fOutputBufferSize);

        // Prefill ouput buffer
        for (int i = 0; i < fNperiods; i++) {
            ssize_t count = ::write(fOutFD, fOutputBuffer, fOutputBufferSize);
            if (count < (int)fOutputBufferSize) {
                jack_error("JackBoomerDriver::Start error bytes written = %ld", count);
            }
        }
    } 
   
    // Start input thread only when needed
    if (fInFD >= 0) {
        if (fInputThread.StartSync() < 0) {
            jack_error("Cannot start input thread");
            return -1;
        }
    }

    // Start output thread only when needed
    if (fOutFD >= 0) {
        if (fOutputThread.StartSync() < 0) {
            jack_error("Cannot start output thread");
            return -1;
        }
    }

    return 0;
}

int JackBoomerDriver::Stop()
{
    // Stop input thread only when needed
    if (fInFD >= 0) {
        fInputThread.Kill();
    }

    // Stop output thread only when needed
    if (fOutFD >= 0) {
        fOutputThread.Kill();
    }

    return 0;
}

bool JackBoomerDriver::JackBoomerDriverInput::Init()
{
    if (fDriver->IsRealTime()) {
        jack_log("JackBoomerDriverInput::Init IsRealTime");
        if (fDriver->fInputThread.AcquireRealTime(GetEngineControl()->fServerPriority) < 0) {
            jack_error("AcquireRealTime error");
        } else {
            set_threaded_log_function(); 
        }
    }
    
    return true;
}

// TODO : better error handling
bool JackBoomerDriver::JackBoomerDriverInput::Execute()
{
  
#ifdef JACK_MONITOR
    gCycleTable.fTable[gCycleReadCount].fBeforeRead = GetMicroSeconds();
#endif

    audio_errinfo ei_in;
    ssize_t count = ::read(fDriver->fInFD, fDriver->fInputBuffer, fDriver->fInputBufferSize);  
 
#ifdef JACK_MONITOR
    if (count > 0 && count != (int)fDriver->fInputBufferSize)
        jack_log("JackBoomerDriverInput::Execute count = %ld", count / (fDriver->fSampleSize * fDriver->fCaptureChannels));
    gCycleTable.fTable[gCycleReadCount].fAfterRead = GetMicroSeconds();
#endif
    
    // XRun detection
    if (ioctl(fDriver->fInFD, SNDCTL_DSP_GETERROR, &ei_in) == 0) {

        if (ei_in.rec_overruns > 0 ) {
            jack_error("JackBoomerDriverInput::Execute overruns");
            jack_time_t cur_time = GetMicroSeconds();
            fDriver->NotifyXRun(cur_time, float(cur_time - fDriver->fBeginDateUst));   // Better this value than nothing... 
        }

        if (ei_in.rec_errorcount > 0 && ei_in.rec_lasterror != 0) {
            jack_error("%d OSS rec event(s), last=%05d:%d", ei_in.rec_errorcount, ei_in.rec_lasterror, ei_in.rec_errorparm);
        }
    }   
    
    if (count < 0) {
        jack_log("JackBoomerDriverInput::Execute error = %s", strerror(errno));
    } else if (count < (int)fDriver->fInputBufferSize) {
        jack_error("JackBoomerDriverInput::Execute error bytes read = %ld", count);
    } else {

        // Keep begin cycle time
        fDriver->CycleTakeBeginTime();
        for (int i = 0; i < fDriver->fCaptureChannels; i++) {
            if (fDriver->fGraphManager->GetConnectionsNum(fDriver->fCapturePortList[i]) > 0) {
                CopyAndConvertIn(fDriver->GetInputBuffer(i), 
                                fDriver->fInputBuffer, 
                                fDriver->fEngineControl->fBufferSize, 
                                i, 
                                fDriver->fCaptureChannels * fDriver->fSampleSize, 
                                fDriver->fBits);
            }
        }

    #ifdef JACK_MONITOR
        gCycleTable.fTable[gCycleReadCount].fAfterReadConvert = GetMicroSeconds();
        gCycleReadCount = (gCycleReadCount == CYCLE_POINTS - 1) ? gCycleReadCount: gCycleReadCount + 1;
    #endif
    }

    // Duplex : sync with write thread
    if (fDriver->fInFD >= 0 && fDriver->fOutFD >= 0) {
        fDriver->SynchronizeRead();
    } else {
        // Otherwise direct process
        fDriver->Process();
    }
    return true;
}

bool JackBoomerDriver::JackBoomerDriverOutput::Init()
{
    if (fDriver->IsRealTime()) {
        jack_log("JackBoomerDriverOutput::Init IsRealTime");
        if (fDriver->fOutputThread.AcquireRealTime(GetEngineControl()->fServerPriority) < 0) {
            jack_error("AcquireRealTime error");
        } else {
            set_threaded_log_function(); 
        }
    }
      
    int delay;
    if (ioctl(fDriver->fOutFD, SNDCTL_DSP_GETODELAY, &delay) == -1) {
        jack_error("JackBoomerDriverOutput::Init error get out delay : %s@%i, errno = %d", __FILE__, __LINE__, errno);
    }
        
    delay /= fDriver->fSampleSize * fDriver->fPlaybackChannels;
    jack_info("JackBoomerDriverOutput::Init output latency frames = %ld", delay);
 
    return true;
}

// TODO : better error handling
bool JackBoomerDriver::JackBoomerDriverOutput::Execute()
{
    memset(fDriver->fOutputBuffer, 0, fDriver->fOutputBufferSize);

#ifdef JACK_MONITOR
    gCycleTable.fTable[gCycleWriteCount].fBeforeWriteConvert = GetMicroSeconds();
#endif
   
    for (int i = 0; i < fDriver->fPlaybackChannels; i++) {
        if (fDriver->fGraphManager->GetConnectionsNum(fDriver->fPlaybackPortList[i]) > 0) {
              CopyAndConvertOut(fDriver->fOutputBuffer, 
                                fDriver->GetOutputBuffer(i), 
                                fDriver->fEngineControl->fBufferSize, 
                                i, 
                                fDriver->fPlaybackChannels * fDriver->fSampleSize, 
                                fDriver->fBits);
        }
    }
    
#ifdef JACK_MONITOR
    gCycleTable.fTable[gCycleWriteCount].fBeforeWrite = GetMicroSeconds();
#endif    

    ssize_t count = ::write(fDriver->fOutFD, fDriver->fOutputBuffer, fDriver->fOutputBufferSize);

#ifdef JACK_MONITOR
    if (count > 0 && count != (int)fDriver->fOutputBufferSize)
        jack_log("JackBoomerDriverOutput::Execute count = %ld", count / (fDriver->fSampleSize * fDriver->fPlaybackChannels));
    gCycleTable.fTable[gCycleWriteCount].fAfterWrite = GetMicroSeconds();
    gCycleWriteCount = (gCycleWriteCount == CYCLE_POINTS - 1) ? gCycleWriteCount: gCycleWriteCount + 1;
#endif

    // XRun detection
    audio_errinfo ei_out;
    if (ioctl(fDriver->fOutFD, SNDCTL_DSP_GETERROR, &ei_out) == 0) {

        if (ei_out.play_underruns > 0) {
            jack_error("JackBoomerDriverOutput::Execute underruns");
            jack_time_t cur_time = GetMicroSeconds();
            fDriver->NotifyXRun(cur_time, float(cur_time - fDriver->fBeginDateUst));   // Better this value than nothing... 
        }

        if (ei_out.play_errorcount > 0 && ei_out.play_lasterror != 0) {
            jack_error("%d OSS play event(s), last=%05d:%d",ei_out.play_errorcount, ei_out.play_lasterror, ei_out.play_errorparm);
        }
    }
     
    if (count < 0) {
        jack_log("JackBoomerDriverOutput::Execute error = %s", strerror(errno));
    } else if (count < (int)fDriver->fOutputBufferSize) {
        jack_error("JackBoomerDriverOutput::Execute error bytes written = %ld", count);
    }
    
    // Duplex : sync with read thread
    if (fDriver->fInFD >= 0 && fDriver->fOutFD >= 0) {
        fDriver->SynchronizeWrite();
    } else {
        // Otherwise direct process
        fDriver->CycleTakeBeginTime();
        fDriver->Process();
    }
    return true;
}

void JackBoomerDriver::SynchronizeRead()
{
    sem_wait(&fWriteSema);
    Process();
    sem_post(&fReadSema);
}

void JackBoomerDriver::SynchronizeWrite()
{
    sem_post(&fWriteSema);
    sem_wait(&fReadSema);
}

int JackBoomerDriver::SetBufferSize(jack_nframes_t buffer_size)
{
    CloseAux(); 
    JackAudioDriver::SetBufferSize(buffer_size); // never fails
    return OpenAux();
}


} // end of namespace

#ifdef __cplusplus
extern "C"
{
#endif

SERVER_EXPORT jack_driver_desc_t* driver_get_descriptor()
{
    jack_driver_desc_t *desc;
    unsigned int i;
    desc = (jack_driver_desc_t*)calloc(1, sizeof(jack_driver_desc_t));

    strcpy(desc->name, "boomer");                              // size MUST be less then JACK_DRIVER_NAME_MAX + 1
    strcpy(desc->desc, "Boomer/OSS API based audio backend");  // size MUST be less then JACK_DRIVER_PARAM_DESC + 1
       
    desc->nparams = OSS_DRIVER_N_PARAMS;
    desc->params = (jack_driver_param_desc_t*)calloc(desc->nparams, sizeof(jack_driver_param_desc_t));

    i = 0;
    strcpy(desc->params[i].name, "rate");
    desc->params[i].character = 'r';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.ui = OSS_DRIVER_DEF_FS;
    strcpy(desc->params[i].short_desc, "Sample rate");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "period");
    desc->params[i].character = 'p';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.ui = OSS_DRIVER_DEF_BLKSIZE;
    strcpy(desc->params[i].short_desc, "Frames per period");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "nperiods");
    desc->params[i].character = 'n';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.ui = OSS_DRIVER_DEF_NPERIODS;
    strcpy(desc->params[i].short_desc, "Number of periods to prefill output buffer");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "wordlength");
    desc->params[i].character = 'w';
    desc->params[i].type = JackDriverParamInt;
    desc->params[i].value.i = OSS_DRIVER_DEF_BITS;
    strcpy(desc->params[i].short_desc, "Word length");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "inchannels");
    desc->params[i].character = 'i';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.ui = OSS_DRIVER_DEF_INS;
    strcpy(desc->params[i].short_desc, "Capture channels");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
    
    i++;
    strcpy(desc->params[i].name, "outchannels");
    desc->params[i].character = 'o';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.ui = OSS_DRIVER_DEF_OUTS;
    strcpy(desc->params[i].short_desc, "Playback channels");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
    
    i++;
    strcpy(desc->params[i].name, "excl");
    desc->params[i].character = 'e';
    desc->params[i].type = JackDriverParamBool;
    desc->params[i].value.i = false;
    strcpy(desc->params[i].short_desc, "Exclusif (O_EXCL) access mode");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "capture");
    desc->params[i].character = 'C';
    desc->params[i].type = JackDriverParamString;
    strcpy(desc->params[i].value.str, OSS_DRIVER_DEF_DEV);
    strcpy(desc->params[i].short_desc, "Input device");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
    
    i++;
    strcpy(desc->params[i].name, "playback");
    desc->params[i].character = 'P';
    desc->params[i].type = JackDriverParamString;
    strcpy(desc->params[i].value.str, OSS_DRIVER_DEF_DEV);
    strcpy(desc->params[i].short_desc, "Output device");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy (desc->params[i].name, "device");
    desc->params[i].character = 'd';
    desc->params[i].type = JackDriverParamString;
    strcpy(desc->params[i].value.str, OSS_DRIVER_DEF_DEV);
    strcpy(desc->params[i].short_desc, "OSS device name");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
    
    i++;
    strcpy(desc->params[i].name, "input-latency");
    desc->params[i].character = 'I';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.i = 0;
    strcpy(desc->params[i].short_desc, "Extra input latency");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "output-latency");
    desc->params[i].character = 'O';
    desc->params[i].type = JackDriverParamUInt;
    desc->params[i].value.i = 0;
    strcpy(desc->params[i].short_desc, "Extra output latency");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    i++;
    strcpy(desc->params[i].name, "sync-io");
    desc->params[i].character = 'S';
    desc->params[i].type = JackDriverParamBool;
    desc->params[i].value.i = false;
    strcpy(desc->params[i].short_desc, "In duplex mode, synchronize input and output");
    strcpy(desc->params[i].long_desc, desc->params[i].short_desc);

    return desc;
}

EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params)
{
    int bits = OSS_DRIVER_DEF_BITS;
    jack_nframes_t srate = OSS_DRIVER_DEF_FS;
    jack_nframes_t frames_per_interrupt = OSS_DRIVER_DEF_BLKSIZE;
    const char* capture_pcm_name = OSS_DRIVER_DEF_DEV;
    const char* playback_pcm_name = OSS_DRIVER_DEF_DEV;
    bool capture = false;
    bool playback = false;
    int chan_in = 0;
    int chan_out = 0;
    bool monitor = false;
    bool excl = false;
    bool syncio = false;
    unsigned int nperiods = OSS_DRIVER_DEF_NPERIODS;
    const JSList *node;
    const jack_driver_param_t *param;
    jack_nframes_t systemic_input_latency = 0;
    jack_nframes_t systemic_output_latency = 0;
 
    for (node = params; node; node = jack_slist_next(node)) {
    
        param = (const jack_driver_param_t *)node->data;

        switch (param->character) {
        
        case 'r':
            srate = param->value.ui;
            break;

        case 'p':
            frames_per_interrupt = (unsigned int)param->value.ui;
            break;

        case 'n':
            nperiods = (unsigned int)param->value.ui;
            break;

        case 'w':
            bits = param->value.i;
            break;

        case 'i':
            chan_in = (int)param->value.ui;
            break;

        case 'o':
            chan_out = (int)param->value.ui;
            break;
            
        case 'C':
            capture = true;
            if (strcmp(param->value.str, "none") != 0) {
                capture_pcm_name = param->value.str;
            }
            break;

        case 'P':
            playback = true;
            if (strcmp(param->value.str, "none") != 0) {
                playback_pcm_name = param->value.str;
            }
            break;

        case 'd':
            playback_pcm_name = param->value.str;
            capture_pcm_name = param->value.str;
            break;
            
        case 'e':
            excl = true;
            break;
		
        case 'I':
            systemic_input_latency = param->value.ui;
            break;

        case 'O':
            systemic_output_latency = param->value.ui;
            break;

        case 'S':
            syncio = true;
            break;
        }
    }

    // duplex is the default
    if (!capture && !playback) {
        capture = true;
        playback = true;
    }

    Jack::JackBoomerDriver* boomer_driver = new Jack::JackBoomerDriver("system", "boomer", engine, table);
    
    // Special open for Boomer driver...
    if (boomer_driver->Open(frames_per_interrupt, nperiods, srate, capture, playback, chan_in, chan_out, excl, 
        monitor, capture_pcm_name, playback_pcm_name, systemic_input_latency, systemic_output_latency, bits, syncio) == 0) {
        return boomer_driver;
    } else {
        delete boomer_driver; // Delete the driver
        return NULL;
    }
}

#ifdef __cplusplus
}
#endif