FreeBSD: Specific FreeBSD OSS driver.

Start with an unchanged copy of the Solaris OSS driver.

3 files changed, 1024 insertions, 1 deletions

diff --git a/freebsd/oss/JackOSSDriver.cpp b/freebsd/oss/JackOSSDriver.cpp
new file mode 100644
index 00000000..36bc5855
--- /dev/null
+++ b/freebsd/oss/JackOSSDriver.cpp
@@ -0,0 +1,887 @@
+/*
+Copyright (C) 2003-2007 Jussi Laako <jussi@sonarnerd.net>
+Copyright (C) 2008 Grame & RTL 2008
+
+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 "JackOSSDriver.h"
+#include "JackEngineControl.h"
+#include "JackGraphManager.h"
+#include "JackError.h"
+#include "JackTime.h"
+#include "JackShmMem.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 gCycleCount = 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 chcount, int bits)
+{
+    switch (bits) {
+
+		case 16: {
+		    signed short *s16src = (signed short*)src;
+            s16src += channel;
+            sample_move_dS_s16(dst, (char*)s16src, nframes, chcount<<1);
+			break;
+        }
+		case 24: {
+			signed int *s32src = (signed int*)src;
+            s32src += channel;
+            sample_move_dS_s24(dst, (char*)s32src, nframes, chcount<<2);
+			break;
+        }
+		case 32: {
+			signed int *s32src = (signed int*)src;
+            s32src += channel;
+            sample_move_dS_s32u24(dst, (char*)s32src, nframes, chcount<<2);
+			break;
+        }
+	}
+}
+
+static inline void CopyAndConvertOut(void *dst, jack_sample_t *src, size_t nframes, int channel, int chcount, int bits)
+{
+	switch (bits) {
+
+		case 16: {
+			signed short *s16dst = (signed short*)dst;
+            s16dst += channel;
+            sample_move_d16_sS((char*)s16dst, src, nframes, chcount<<1, NULL); // No dithering for now...
+			break;
+        }
+		case 24: {
+			signed int *s32dst = (signed int*)dst;
+            s32dst += channel;
+            sample_move_d24_sS((char*)s32dst, src, nframes, chcount<<2, NULL); // No dithering for now...
+			break;
+        }
+		case 32: {
+            signed int *s32dst = (signed int*)dst;
+            s32dst += channel;
+            sample_move_d32u24_sS((char*)s32dst, src, nframes, chcount<<2, NULL);
+			break;
+        }
+	}
+}
+
+void JackOSSDriver::SetSampleFormat()
+{
+    switch (fBits) {
+
+	    case 24:	/* native-endian LSB aligned 24-bits in 32-bits integer */
+            fSampleFormat = AFMT_S24_NE;
+            fSampleSize = sizeof(int);
+			break;
+		case 32:	/* native-endian 32-bit integer */
+            fSampleFormat = AFMT_S32_NE;
+            fSampleSize = sizeof(int);
+			break;
+		case 16:	/* native-endian 16-bit integer */
+		default:
+            fSampleFormat = AFMT_S16_NE;
+            fSampleSize = sizeof(short);
+			break;
+    }
+}
+
+void JackOSSDriver::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("JackOSSDriver::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("JackOSSDriver::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);
+        }
+
+        if (ioctl(fOutFD, SNDCTL_DSP_GETCAPS, &cap) == -1)  {
+            jack_error("JackOSSDriver::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("JackOSSDriver::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("JackOSSDriver::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("JackOSSDriver::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!");
+    }
+}
+
+int JackOSSDriver::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("JackOSSDriver::OpenInput failed to open device : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        return -1;
+    }
+
+    jack_log("JackOSSDriver::OpenInput input fInFD = %d", fInFD);
+
+    if (fExcl) {
+        if (ioctl(fInFD, SNDCTL_DSP_COOKEDMODE, &flags) == -1) {
+            jack_error("JackOSSDriver::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("JackOSSDriver::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("JackOSSDriver::OpenInput failed to set format : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+    if (cur_sample_format != fSampleFormat) {
+        jack_info("JackOSSDriver::OpenInput driver forced the sample format %ld", fSampleFormat);
+    }
+
+    cur_capture_channels = fCaptureChannels;
+    if (ioctl(fInFD, SNDCTL_DSP_CHANNELS, &fCaptureChannels) == -1) {
+        jack_error("JackOSSDriver::OpenInput failed to set channels : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+    if (cur_capture_channels != fCaptureChannels) {
+        jack_info("JackOSSDriver::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("JackOSSDriver::OpenInput failed to set sample rate : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+    if (cur_sample_rate != fEngineControl->fSampleRate) {
+        jack_info("JackOSSDriver::OpenInput driver forced the sample rate %ld", fEngineControl->fSampleRate);
+    }
+
+    fInputBufferSize = 0;
+    if (ioctl(fInFD, SNDCTL_DSP_GETBLKSIZE, &fInputBufferSize) == -1) {
+        jack_error("JackOSSDriver::OpenInput failed to get fragments : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+
+    if (fInputBufferSize != fEngineControl->fBufferSize * fSampleSize * fCaptureChannels) {
+       if (fIgnoreHW) {
+           int new_buffer_size = fInputBufferSize / (fSampleSize * fCaptureChannels);
+           jack_info("JackOSSDriver::OpenInput driver forced buffer size %ld", new_buffer_size);
+           JackAudioDriver::SetBufferSize(new_buffer_size); // never fails
+       } else {
+           jack_error("JackOSSDriver::OpenInput wanted buffer size cannot be obtained");
+           goto error;
+       }
+    }
+
+    fInputBuffer = (void*)calloc(fInputBufferSize, 1);
+    assert(fInputBuffer);
+    return 0;
+
+error:
+    ::close(fInFD);
+    return -1;
+}
+
+int JackOSSDriver::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("JackOSSDriver::OpenOutput failed to open device : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+       return -1;
+    }
+
+    jack_log("JackOSSDriver::OpenOutput output fOutFD = %d", fOutFD);
+
+    if (fExcl) {
+        if (ioctl(fOutFD, SNDCTL_DSP_COOKEDMODE, &flags) == -1) {
+            jack_error("JackOSSDriver::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("JackOSSDriver::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("JackOSSDriver::OpenOutput failed to set format : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+    if (cur_sample_format != fSampleFormat) {
+        jack_info("JackOSSDriver::OpenOutput driver forced the sample format %ld", fSampleFormat);
+    }
+
+    cur_playback_channels = fPlaybackChannels;
+    if (ioctl(fOutFD, SNDCTL_DSP_CHANNELS, &fPlaybackChannels) == -1) {
+        jack_error("JackOSSDriver::OpenOutput failed to set channels : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+    if (cur_playback_channels != fPlaybackChannels) {
+        jack_info("JackOSSDriver::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("JackOSSDriver::OpenOutput failed to set sample rate : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+    if (cur_sample_rate != fEngineControl->fSampleRate) {
+        jack_info("JackOSSDriver::OpenInput driver forced the sample rate %ld", fEngineControl->fSampleRate);
+    }
+
+    fOutputBufferSize = 0;
+    if (ioctl(fOutFD, SNDCTL_DSP_GETBLKSIZE, &fOutputBufferSize) == -1) {
+        jack_error("JackOSSDriver::OpenOutput failed to get fragments : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+        goto error;
+    }
+
+    if (fOutputBufferSize != fEngineControl->fBufferSize * fSampleSize * fPlaybackChannels) {
+       if (fIgnoreHW) {
+           int new_buffer_size = fOutputBufferSize / (fSampleSize * fPlaybackChannels);
+           jack_info("JackOSSDriver::OpenOutput driver forced buffer size %ld", new_buffer_size);
+           JackAudioDriver::SetBufferSize(new_buffer_size); // never fails
+       } else {
+           jack_error("JackOSSDriver::OpenInput wanted buffer size cannot be obtained");
+           goto error;
+       }
+    }
+
+    fOutputBuffer = (void*)calloc(fOutputBufferSize, 1);
+    fFirstCycle = true;
+    assert(fOutputBuffer);
+    return 0;
+
+error:
+    ::close(fOutFD);
+    return -1;
+}
+
+int JackOSSDriver::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 ignorehwbuf)
+{
+    // 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;
+        fIgnoreHW = ignorehwbuf;
+        fNperiods = user_nperiods;
+        fExcl = excl;
+
+    #ifdef JACK_MONITOR
+        // Force memory page in
+        memset(&gCycleTable, 0, sizeof(gCycleTable));
+    #endif
+
+        if (OpenAux() < 0) {
+            Close();
+            return -1;
+        } else {
+            return 0;
+        }
+    }
+}
+
+int JackOSSDriver::Close()
+{
+ #ifdef JACK_MONITOR
+    FILE* file = fopen("OSSProfiling.log", "w");
+
+    if (file) {
+        jack_info("Writing OSS driver timing data....");
+        for (int i = 1; i < gCycleCount; 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("JackOSSDriver::Close : cannot open OSSProfiling.log file");
+    }
+
+    file = fopen("TimingOSS.plot", "w");
+
+    if (file == NULL) {
+        jack_error("JackOSSDriver::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 JackOSSDriver::OpenAux()
+{
+    SetSampleFormat();
+
+    if ((fRWMode & kRead) && (OpenInput() < 0)) {
+        return -1;
+    }
+
+    if ((fRWMode & kWrite) && (OpenOutput() < 0)) {
+        return -1;
+    }
+
+    // In duplex mode, check that input and output use the same buffer size
+    /*
+
+    10/02/09 : deactivated for now, needs more check (only needed when *same* device is used for input and output ??)
+
+    if ((fRWMode & kRead) && (fRWMode & kWrite) && (fInputBufferSize != fOutputBufferSize)) {
+       jack_error("JackOSSDriver::OpenAux input and output buffer size are not the same!!");
+       return -1;
+    }
+    */
+
+    DisplayDeviceInfo();
+    return 0;
+}
+
+void JackOSSDriver::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 JackOSSDriver::Read()
+{
+    if (fInFD < 0) {
+        // Keep begin cycle time
+        JackDriver::CycleTakeBeginTime();
+        return 0;
+    }
+
+    ssize_t count;
+
+#ifdef JACK_MONITOR
+    gCycleTable.fTable[gCycleCount].fBeforeRead = GetMicroSeconds();
+#endif
+
+    audio_errinfo ei_in;
+    count = ::read(fInFD, fInputBuffer, fInputBufferSize);
+
+#ifdef JACK_MONITOR
+    if (count > 0 && count != (int)fInputBufferSize)
+        jack_log("JackOSSDriver::Read count = %ld", count / (fSampleSize * fCaptureChannels));
+    gCycleTable.fTable[gCycleCount].fAfterRead = GetMicroSeconds();
+#endif
+
+    // XRun detection
+    if (ioctl(fInFD, SNDCTL_DSP_GETERROR, &ei_in) == 0) {
+
+        if (ei_in.rec_overruns > 0 ) {
+            jack_error("JackOSSDriver::Read overruns");
+            jack_time_t cur_time = GetMicroSeconds();
+            NotifyXRun(cur_time, float(cur_time - 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("JackOSSDriver::Read error = %s", strerror(errno));
+        return -1;
+    } else if (count < (int)fInputBufferSize) {
+        jack_error("JackOSSDriver::Read error bytes read = %ld", count);
+        return -1;
+    } else {
+
+        // Keep begin cycle time
+        JackDriver::CycleTakeBeginTime();
+        for (int i = 0; i < fCaptureChannels; i++) {
+            if (fGraphManager->GetConnectionsNum(fCapturePortList[i]) > 0) {
+                CopyAndConvertIn(GetInputBuffer(i), fInputBuffer, fEngineControl->fBufferSize, i, fCaptureChannels, fBits);
+            }
+        }
+
+    #ifdef JACK_MONITOR
+        gCycleTable.fTable[gCycleCount].fAfterReadConvert = GetMicroSeconds();
+    #endif
+
+        return 0;
+    }
+}
+
+int JackOSSDriver::Write()
+{
+    if (fOutFD < 0) {
+        // Keep end cycle time
+        JackDriver::CycleTakeEndTime();
+        return 0;
+    }
+
+    ssize_t count;
+    audio_errinfo ei_out;
+
+    // Maybe necessary to write an empty output buffer first time : see http://manuals.opensound.com/developer/fulldup.c.html
+    if (fFirstCycle) {
+
+        fFirstCycle = false;
+        memset(fOutputBuffer, 0, fOutputBufferSize);
+
+        // Prefill output buffer
+        for (int i = 0; i < fNperiods; i++) {
+           count = ::write(fOutFD, fOutputBuffer, fOutputBufferSize);
+           if (count < (int)fOutputBufferSize) {
+                jack_error("JackOSSDriver::Write error bytes written = %ld", count);
+                return -1;
+            }
+        }
+
+        int delay;
+        if (ioctl(fOutFD, SNDCTL_DSP_GETODELAY, &delay) == -1) {
+            jack_error("JackOSSDriver::Write error get out delay : %s@%i, errno = %d", __FILE__, __LINE__, errno);
+            return -1;
+        }
+
+        delay /= fSampleSize * fPlaybackChannels;
+        jack_info("JackOSSDriver::Write output latency frames = %ld", delay);
+    }
+
+#ifdef JACK_MONITOR
+    gCycleTable.fTable[gCycleCount].fBeforeWriteConvert = GetMicroSeconds();
+#endif
+
+    memset(fOutputBuffer, 0, fOutputBufferSize);
+    for (int i = 0; i < fPlaybackChannels; i++) {
+        if (fGraphManager->GetConnectionsNum(fPlaybackPortList[i]) > 0) {
+            CopyAndConvertOut(fOutputBuffer, GetOutputBuffer(i), fEngineControl->fBufferSize, i, fPlaybackChannels, fBits);
+        }
+    }
+
+  #ifdef JACK_MONITOR
+    gCycleTable.fTable[gCycleCount].fBeforeWrite = GetMicroSeconds();
+  #endif
+
+    // Keep end cycle time
+    JackDriver::CycleTakeEndTime();
+    count = ::write(fOutFD, fOutputBuffer, fOutputBufferSize);
+
+  #ifdef JACK_MONITOR
+    if (count > 0 && count != (int)fOutputBufferSize)
+        jack_log("JackOSSDriver::Write count = %ld", count / (fSampleSize * fPlaybackChannels));
+    gCycleTable.fTable[gCycleCount].fAfterWrite = GetMicroSeconds();
+    gCycleCount = (gCycleCount == CYCLE_POINTS - 1) ? gCycleCount: gCycleCount + 1;
+  #endif
+
+    // XRun detection
+    if (ioctl(fOutFD, SNDCTL_DSP_GETERROR, &ei_out) == 0) {
+
+        if (ei_out.play_underruns > 0) {
+            jack_error("JackOSSDriver::Write underruns");
+            jack_time_t cur_time = GetMicroSeconds();
+            NotifyXRun(cur_time, float(cur_time - 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("JackOSSDriver::Write error = %s", strerror(errno));
+        return -1;
+    } else if (count < (int)fOutputBufferSize) {
+        jack_error("JackOSSDriver::Write error bytes written = %ld", count);
+        return -1;
+    } else {
+        return 0;
+    }
+}
+
+int JackOSSDriver::SetBufferSize(jack_nframes_t buffer_size)
+{
+    CloseAux();
+    JackAudioDriver::SetBufferSize(buffer_size); // Generic change, never fails
+    return OpenAux();
+}
+
+int JackOSSDriver::ProcessSync()
+{
+    // Read input buffers for the current cycle
+    if (Read() < 0) {
+        jack_error("ProcessSync: read error, skip cycle");
+        return 0;   // Non fatal error here, skip cycle, but continue processing...
+    }
+
+    if (fIsMaster) {
+        ProcessGraphSync();
+    } else {
+        ResumeRefNum();
+    }
+
+    // Write output buffers for the current cycle
+    if (Write() < 0) {
+        jack_error("JackAudioDriver::ProcessSync: write error, skip cycle");
+        return 0;   // Non fatal error here, skip cycle, but continue processing...
+    }
+
+    return 0;
+}
+
+} // end of namespace
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+SERVER_EXPORT jack_driver_desc_t* driver_get_descriptor()
+{
+    jack_driver_desc_t * desc;
+    jack_driver_desc_filler_t filler;
+    jack_driver_param_value_t value;
+
+    desc = jack_driver_descriptor_construct("oss", JackDriverMaster, "OSS API based audio backend", &filler);
+
+    value.ui = OSS_DRIVER_DEF_FS;
+    jack_driver_descriptor_add_parameter(desc, &filler, "rate", 'r', JackDriverParamUInt, &value, NULL, "Sample rate", NULL);
+
+    value.ui = OSS_DRIVER_DEF_BLKSIZE;
+    jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", NULL);
+
+    value.ui = OSS_DRIVER_DEF_NPERIODS;
+    jack_driver_descriptor_add_parameter(desc, &filler, "nperiods", 'n', JackDriverParamUInt, &value, NULL, "Number of periods to prefill output buffer", NULL);
+
+    value.i = OSS_DRIVER_DEF_BITS;
+    jack_driver_descriptor_add_parameter(desc, &filler, "wordlength", 'w', JackDriverParamInt, &value, NULL, "Word length", NULL);
+
+    value.ui = OSS_DRIVER_DEF_INS;
+    jack_driver_descriptor_add_parameter(desc, &filler, "inchannels", 'i', JackDriverParamUInt, &value, NULL, "Capture channels", NULL);
+
+    value.ui = OSS_DRIVER_DEF_OUTS;
+    jack_driver_descriptor_add_parameter(desc, &filler, "outchannels", 'o', JackDriverParamUInt, &value, NULL, "Playback channels", NULL);
+
+    value.i = false;
+    jack_driver_descriptor_add_parameter(desc, &filler, "excl", 'e', JackDriverParamBool, &value, NULL, "Exclusif (O_EXCL) access mode", NULL);
+
+    strcpy(value.str, OSS_DRIVER_DEF_DEV);
+    jack_driver_descriptor_add_parameter(desc, &filler, "capture", 'C', JackDriverParamString, &value, NULL, "Input device", NULL);
+    jack_driver_descriptor_add_parameter(desc, &filler, "playback", 'P', JackDriverParamString, &value, NULL, "Output device", NULL);
+    jack_driver_descriptor_add_parameter(desc, &filler, "device", 'd', JackDriverParamString, &value, NULL, "OSS device name", NULL);
+
+    value.i = false;
+    jack_driver_descriptor_add_parameter(desc, &filler, "ignorehwbuf", 'b', JackDriverParamBool, &value, NULL, "Ignore hardware period size", NULL);
+
+    value.ui = 0;
+    jack_driver_descriptor_add_parameter(desc, &filler, "input-latency", 'I', JackDriverParamUInt, &value, NULL, "Extra input latency", NULL);
+    jack_driver_descriptor_add_parameter(desc, &filler, "output-latency", 'O', JackDriverParamUInt, &value, NULL, "Extra output latency", NULL);
+
+    return desc;
+}
+
+SERVER_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;
+    unsigned int nperiods = OSS_DRIVER_DEF_NPERIODS;
+    const JSList *node;
+    const jack_driver_param_t *param;
+    bool ignorehwbuf = false;
+    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 'b':
+            ignorehwbuf = true;
+            break;
+
+        case 'e':
+            excl = true;
+            break;
+
+        case 'I':
+            systemic_input_latency = param->value.ui;
+            break;
+
+        case 'O':
+            systemic_output_latency = param->value.ui;
+            break;
+        }
+    }
+
+    // duplex is the default
+    if (!capture && !playback) {
+        capture = true;
+        playback = true;
+    }
+
+    Jack::JackOSSDriver* oss_driver = new Jack::JackOSSDriver("system", "oss", engine, table);
+    Jack::JackDriverClientInterface* threaded_driver = new Jack::JackThreadedDriver(oss_driver);
+
+    // Special open for OSS driver...
+    if (oss_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, ignorehwbuf) == 0) {
+        return threaded_driver;
+    } else {
+        delete threaded_driver; // Delete the decorated driver
+        return NULL;
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/freebsd/oss/JackOSSDriver.h b/freebsd/oss/JackOSSDriver.h
new file mode 100644
index 00000000..32758d40
--- /dev/null
+++ b/freebsd/oss/JackOSSDriver.h
@@ -0,0 +1,125 @@
+/*
+Copyright (C) 2003-2007 Jussi Laako <jussi@sonarnerd.net>
+Copyright (C) 2008 Grame & RTL 2008
+
+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.
+
+*/
+
+#ifndef __JackOSSDriver__
+#define __JackOSSDriver__
+
+#include "JackAudioDriver.h"
+
+namespace Jack
+{
+
+typedef jack_default_audio_sample_t jack_sample_t;
+
+#define OSS_DRIVER_DEF_DEV	"/dev/dsp"
+#define OSS_DRIVER_DEF_FS	48000
+#define OSS_DRIVER_DEF_BLKSIZE	1024
+#define OSS_DRIVER_DEF_NPERIODS	1
+#define OSS_DRIVER_DEF_BITS	16
+#define OSS_DRIVER_DEF_INS	2
+#define OSS_DRIVER_DEF_OUTS	2
+
+/*!
+\brief The OSS driver.
+*/
+
+class JackOSSDriver : public JackAudioDriver
+{
+
+    enum { kRead = 1, kWrite = 2, kReadWrite = 3 };
+
+    private:
+
+        int fInFD;
+        int fOutFD;
+
+        int fBits;
+        int fSampleFormat;
+        int fNperiods;
+        unsigned int fSampleSize;
+        int fRWMode;
+        bool fExcl;
+        bool fIgnoreHW;
+
+        unsigned int fInputBufferSize;
+        unsigned int fOutputBufferSize;
+
+        void* fInputBuffer;
+        void* fOutputBuffer;
+
+        bool fFirstCycle;
+
+        int OpenInput();
+        int OpenOutput();
+        int OpenAux();
+        void CloseAux();
+        void SetSampleFormat();
+        void DisplayDeviceInfo();
+
+        // Redefining since timing for CPU load is specific
+        int ProcessSync();
+
+    public:
+
+        JackOSSDriver(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), fRWMode(0), fExcl(false), fIgnoreHW(true),
+                fInputBufferSize(0), fOutputBufferSize(0),
+                fInputBuffer(NULL), fOutputBuffer(NULL), fFirstCycle(true)
+        {}
+
+        virtual ~JackOSSDriver()
+        {}
+
+        int Open(jack_nframes_t frames_per_cycle,
+                 int user_nperiods,
+                 jack_nframes_t rate,
+                 bool capturing,
+                 bool playing,
+                 int chan_in,
+                 int chan_out,
+                 bool vmix,
+                 bool monitor,
+                 const char* capture_driver_name,
+                 const char* playback_driver_name,
+                 jack_nframes_t capture_latency,
+                 jack_nframes_t playback_latency,
+                 int bits,
+                 bool ignorehwbuf);
+
+        int Close();
+
+        int Read();
+        int Write();
+
+        // BufferSize can be changed
+        bool IsFixedBufferSize()
+        {
+            return false;
+        }
+
+        int SetBufferSize(jack_nframes_t buffer_size);
+
+};
+
+} // end of namespace
+
+#endif
diff --git a/wscript b/wscript
index a1cf01c8..b7d8c925 100644
--- a/wscript
+++ b/wscript
@@ -674,6 +674,11 @@ def build_drivers(bld):
         'linux/firewire/JackFFADOMidiSendQueue.cpp'
     ]
 
+    freebsd_oss_src = [
+        'common/memops.c',
+        'freebsd/oss/JackOSSDriver.cpp'
+    ]
+
     iio_driver_src = [
         'linux/iio/JackIIODriver.cpp'
     ]
@@ -780,7 +785,13 @@ def build_drivers(bld):
             use = ['serverlib'], # FIXME: Is this needed?
             framework = ['AudioUnit', 'CoreMIDI', 'CoreServices', 'Foundation'])
 
-    if bld.env['IS_SUN'] or bld.env['IS_FREEBSD']:
+    if bld.env['IS_FREEBSD']:
+        create_driver_obj(
+            bld,
+            target = 'oss',
+            source = freebsd_oss_src)
+
+    if bld.env['IS_SUN']:
         create_driver_obj(
             bld,
             target = 'boomer',