JackOSSAdapter.cpp
/*
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 "JackOSSAdapter.h"
#include "JackServerGlobals.h"
#include "JackEngineControl.h"
#include "memops.h"
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <fcntl.h>
#include <iostream>
#include <assert.h>
namespace Jack
{
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 JackOSSAdapter::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;
}
}
JackOSSAdapter::JackOSSAdapter(jack_nframes_t buffer_size, jack_nframes_t sample_rate, const JSList* params)
:JackAudioAdapterInterface(buffer_size, sample_rate)
,fThread(this),
fInFD(-1), fOutFD(-1), fBits(OSS_DRIVER_DEF_BITS),
fSampleFormat(0), fNperiods(OSS_DRIVER_DEF_NPERIODS), fRWMode(0), fIgnoreHW(true), fExcl(false),
fInputBufferSize(0), fOutputBufferSize(0),
fInputBuffer(NULL), fOutputBuffer(NULL), fFirstCycle(true)
{
const JSList* node;
const jack_driver_param_t* param;
fCaptureChannels = 2;
fPlaybackChannels = 2;
strcpy(fCaptureDriverName, OSS_DRIVER_DEF_DEV);
strcpy(fPlaybackDriverName, OSS_DRIVER_DEF_DEV);
for (node = params; node; node = jack_slist_next(node)) {
param = (const jack_driver_param_t*) node->data;
switch (param->character) {
case 'r':
SetAdaptedSampleRate(param->value.ui);
break;
case 'p':
SetAdaptedBufferSize(param->value.ui);
break;
case 'n':
fNperiods = param->value.ui;
break;
case 'w':
fBits = param->value.i;
break;
case 'i':
fCaptureChannels = param->value.ui;
break;
case 'o':
fPlaybackChannels = param->value.ui;
break;
case 'e':
fExcl = true;
break;
case 'C':
fRWMode |= kRead;
if (strcmp(param->value.str, "none") != 0) {
strcpy(fCaptureDriverName, param->value.str);
}
break;
case 'P':
fRWMode |= kWrite;
if (strcmp(param->value.str, "none") != 0) {
strcpy(fPlaybackDriverName, param->value.str);
}
break;
case 'd':
fRWMode |= kRead;
fRWMode |= kWrite;
strcpy(fCaptureDriverName, param->value.str);
strcpy(fPlaybackDriverName, param->value.str);
break;
case 'b':
fIgnoreHW = true;
break;
case 'q':
fQuality = param->value.ui;
break;
case 'g':
fRingbufferCurSize = param->value.ui;
fAdaptative = false;
break;
}
}
fRWMode |= kRead;
fRWMode |= kWrite;
}
void JackOSSAdapter::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", fAdaptedSampleRate, fSampleFormat, fRWMode);
if (fRWMode & kWrite) {
oss_sysinfo si;
if (ioctl(fOutFD, OSS_SYSINFO, &si) == -1) {
jack_error("JackOSSAdapter::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("JackOSSAdapter::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("JackOSSAdapter::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("JackOSSAdapter::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_GETOSPACE, &info) == -1) {
jack_error("JackOSSAdapter::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("JackOSSAdapter::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 (ioctl(fInFD, SNDCTL_AUDIOINFO, &ai_in) != -1) {
jack_info("Using audio engine %d = %s for input", ai_in.dev, ai_in.name);
}
if (ioctl(fOutFD, SNDCTL_AUDIOINFO, &ai_out) != -1) {
jack_info("Using audio engine %d = %s for output", ai_out.dev, ai_out.name);
}
if (ai_in.rate_source != ai_out.rate_source) {
jack_info("Warning : input and output are not necessarily driven by the same clock!");
}
}
int JackOSSAdapter::OpenInput()
{
int flags = 0;
int gFragFormat;
int cur_sample_format, cur_capture_channels;
jack_nframes_t cur_sample_rate;
if (fCaptureChannels == 0) fCaptureChannels = 2;
if ((fInFD = open(fCaptureDriverName, O_RDONLY | ((fExcl) ? O_EXCL : 0))) < 0) {
jack_error("JackOSSAdapter::OpenInput failed to open device : %s@%i, errno = %d", __FILE__, __LINE__, errno);
return -1;
}
if (fExcl) {
if (ioctl(fInFD, SNDCTL_DSP_COOKEDMODE, &flags) == -1) {
jack_error("JackOSSAdapter::OpenInput failed to set cooked mode : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
}
gFragFormat = (2 << 16) + int2pow2(fAdaptedBufferSize * fSampleSize * fCaptureChannels);
if (ioctl(fInFD, SNDCTL_DSP_SETFRAGMENT, &gFragFormat) == -1) {
jack_error("JackOSSAdapter::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("JackOSSAdapter::OpenInput failed to set format : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (cur_sample_format != fSampleFormat) {
jack_info("JackOSSAdapter::OpenInput driver forced the sample format %ld", fSampleFormat);
}
cur_capture_channels = fCaptureChannels;
if (ioctl(fInFD, SNDCTL_DSP_CHANNELS, &fCaptureChannels) == -1) {
jack_error("JackOSSAdapter::OpenInput failed to set channels : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (cur_capture_channels != fCaptureChannels) {
jack_info("JackOSSAdapter::OpenInput driver forced the number of capture channels %ld", fCaptureChannels);
}
cur_sample_rate = fAdaptedSampleRate;
if (ioctl(fInFD, SNDCTL_DSP_SPEED, &fAdaptedSampleRate) == -1) {
jack_error("JackOSSAdapter::OpenInput failed to set sample rate : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (cur_sample_rate != fAdaptedSampleRate) {
jack_info("JackOSSAdapter::OpenInput driver forced the sample rate %ld", fAdaptedSampleRate);
}
fInputBufferSize = 0;
if (ioctl(fInFD, SNDCTL_DSP_GETBLKSIZE, &fInputBufferSize) == -1) {
jack_error("JackOSSAdapter::OpenInput failed to get fragments : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (fInputBufferSize != fAdaptedBufferSize * fSampleSize * fCaptureChannels) {
if (fIgnoreHW) {
jack_info("JackOSSAdapter::OpenInput driver forced buffer size %ld", fOutputBufferSize);
} else {
jack_error("JackOSSAdapter::OpenInput wanted buffer size cannot be obtained");
goto error;
}
}
fInputBuffer = (void*)calloc(fInputBufferSize, 1);
assert(fInputBuffer);
fInputSampleBuffer = (float**)malloc(fCaptureChannels * sizeof(float*));
assert(fInputSampleBuffer);
for (int i = 0; i < fCaptureChannels; i++) {
fInputSampleBuffer[i] = (float*)malloc(fAdaptedBufferSize * sizeof(float));
assert(fInputSampleBuffer[i]);
}
return 0;
error:
::close(fInFD);
return -1;
}
int JackOSSAdapter::OpenOutput()
{
int flags = 0;
int gFragFormat;
int cur_sample_format, 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("JackOSSAdapter::OpenOutput failed to open device : %s@%i, errno = %d", __FILE__, __LINE__, errno);
return -1;
}
if (fExcl) {
if (ioctl(fOutFD, SNDCTL_DSP_COOKEDMODE, &flags) == -1) {
jack_error("JackOSSAdapter::OpenOutput failed to set cooked mode : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
}
gFragFormat = (2 << 16) + int2pow2(fAdaptedBufferSize * fSampleSize * fPlaybackChannels);
if (ioctl(fOutFD, SNDCTL_DSP_SETFRAGMENT, &gFragFormat) == -1) {
jack_error("JackOSSAdapter::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("JackOSSAdapter::OpenOutput failed to set format : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (cur_sample_format != fSampleFormat) {
jack_info("JackOSSAdapter::OpenOutput driver forced the sample format %ld", fSampleFormat);
}
cur_playback_channels = fPlaybackChannels;
if (ioctl(fOutFD, SNDCTL_DSP_CHANNELS, &fPlaybackChannels) == -1) {
jack_error("JackOSSAdapter::OpenOutput failed to set channels : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (cur_playback_channels != fPlaybackChannels) {
jack_info("JackOSSAdapter::OpenOutput driver forced the number of playback channels %ld", fPlaybackChannels);
}
cur_sample_rate = fAdaptedSampleRate;
if (ioctl(fOutFD, SNDCTL_DSP_SPEED, &fAdaptedSampleRate) == -1) {
jack_error("JackOSSAdapter::OpenOutput failed to set sample rate : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (cur_sample_rate != fAdaptedSampleRate) {
jack_info("JackOSSAdapter::OpenInput driver forced the sample rate %ld", fAdaptedSampleRate);
}
fOutputBufferSize = 0;
if (ioctl(fOutFD, SNDCTL_DSP_GETBLKSIZE, &fOutputBufferSize) == -1) {
jack_error("JackOSSAdapter::OpenOutput failed to get fragments : %s@%i, errno = %d", __FILE__, __LINE__, errno);
goto error;
}
if (fOutputBufferSize != fAdaptedBufferSize * fSampleSize * fPlaybackChannels) {
if (fIgnoreHW) {
jack_info("JackOSSAdapter::OpenOutput driver forced buffer size %ld", fOutputBufferSize);
} else {
jack_error("JackOSSAdapter::OpenInput wanted buffer size cannot be obtained");
goto error;
}
}
fOutputBuffer = (void*)calloc(fOutputBufferSize, 1);
assert(fOutputBuffer);
fOutputSampleBuffer = (float**)malloc(fPlaybackChannels * sizeof(float*));
assert(fOutputSampleBuffer);
for (int i = 0; i < fPlaybackChannels; i++) {
fOutputSampleBuffer[i] = (float*)malloc(fAdaptedBufferSize * sizeof(float));
assert(fOutputSampleBuffer[i]);
}
fFirstCycle = true;
return 0;
error:
::close(fOutFD);
return -1;
}
int JackOSSAdapter::Open()
{
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
if ((fRWMode & kRead) && (fRWMode & kWrite) && (fInputBufferSize != fOutputBufferSize)) {
jack_error("JackOSSAdapter::OpenAux input and output buffer size are not the same!!");
goto error;
}
DisplayDeviceInfo();
//start adapter thread
if (fThread.StartSync() < 0) {
jack_error ( "Cannot start audioadapter thread" );
return -1;
}
//turn the thread realtime
fThread.AcquireRealTime(JackServerGlobals::fInstance->GetEngineControl()->fClientPriority);
return 0;
error:
CloseAux();
return -1;
}
int JackOSSAdapter::Close()
{
#ifdef JACK_MONITOR
fTable.Save(fHostBufferSize, fHostSampleRate, fAdaptedSampleRate, fAdaptedBufferSize);
#endif
fThread.Stop();
CloseAux();
return 0;
}
void JackOSSAdapter::CloseAux()
{
if (fRWMode & kRead) {
close(fInFD);
fInFD = -1;
}
if (fRWMode & kWrite) {
close(fOutFD);
fOutFD = -1;
}
free(fInputBuffer);
fInputBuffer = NULL;
free(fOutputBuffer);
fOutputBuffer = NULL;
for (int i = 0; i < fCaptureChannels; i++) {
free(fInputSampleBuffer[i]);
}
free(fInputSampleBuffer);
for (int i = 0; i < fPlaybackChannels; i++) {
free(fOutputSampleBuffer[i]);
}
free(fOutputSampleBuffer);
}
int JackOSSAdapter::Read()
{
ssize_t count = ::read(fInFD, fInputBuffer, fInputBufferSize);
if (count < fInputBufferSize) {
jack_error("JackOSSAdapter::Read error bytes read = %ld", count);
return -1;
} else {
for (int i = 0; i < fCaptureChannels; i++) {
CopyAndConvertIn(fInputSampleBuffer[i], fInputBuffer, fAdaptedBufferSize, i, fCaptureChannels, fBits);
}
return 0;
}
}
int JackOSSAdapter::Write()
{
ssize_t count;
// Maybe necessay 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 ouput buffer
for (int i = 0; i < fNperiods; i++) {
count = ::write(fOutFD, fOutputBuffer, fOutputBufferSize);
if (count < 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);
}
for (int i = 0; i < fPlaybackChannels; i++) {
CopyAndConvertOut(fOutputBuffer, fOutputSampleBuffer[i], fAdaptedBufferSize, i, fCaptureChannels, fBits);
}
count = ::write(fOutFD, fOutputBuffer, fOutputBufferSize);
if (count < fOutputBufferSize) {
jack_error("JackOSSAdapter::Write error bytes written = %ld", count);
return -1;
} else {
return 0;
}
}
bool JackOSSAdapter::Execute()
{
//read data from audio interface
if (Read() < 0)
return false;
PushAndPull(fInputSampleBuffer, fOutputSampleBuffer, fAdaptedBufferSize);
//write data to audio interface
if (Write() < 0)
return false;
return true;
}
int JackOSSAdapter::SetBufferSize(jack_nframes_t buffer_size)
{
JackAudioAdapterInterface::SetBufferSize(buffer_size);
Close();
return Open();
}
} // namespace
#ifdef __cplusplus
extern "C"
{
#endif
SERVER_EXPORT jack_driver_desc_t* jack_get_descriptor()
{
jack_driver_desc_t * desc;
jack_driver_desc_filler_t filler;
jack_driver_param_value_t value;
desc = jack_driver_descriptor_construct("audioadapter", JackDriverNone, "netjack audio <==> net backend adapter", &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, "in-channels", 'i', JackDriverParamUInt, &value, NULL, "Capture channels", NULL);
value.ui = OSS_DRIVER_DEF_OUTS;
jack_driver_descriptor_add_parameter(desc, &filler, "out-channels", '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 = true;
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, "quality", 'q', JackDriverParamInt, &value, NULL, "Resample algorithm quality (0 - 4)", NULL);
value.i = 32768;
jack_driver_descriptor_add_parameter(desc, &filler, "ring-buffer", 'g', JackDriverParamInt, &value, NULL, "Fixed ringbuffer size", "Fixed ringbuffer size (if not set => automatic adaptative)");
return desc;
}
#ifdef __cplusplus
}
#endif
Jack
Definition: JackAC3Encoder.cpp:30
jack_driver_param_value_t
Definition: driver_interface.h:64
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
jack_info
SERVER_EXPORT void jack_info(const char *fmt,...)
Definition: JackError.cpp:100
jack_driver_desc_filler_t
Definition: driver_interface.h:142
jack_driver_param_t
Definition: driver_interface.h:125
_JSList
Definition: linux/alsa/jslist.h:35
jack_driver_desc_t
Definition: driver_interface.h:132