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/*
Copyright (C) 2001 Paul Davis
Copyright (C) 2004-2008 Grame
Copyright (C) 2013 Samsung Electronics
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 "JackGoldfishDriver.h"
#include "JackDriverLoader.h"
#include "JackThreadedDriver.h"
#include "JackEngineControl.h"
#include "JackGraphManager.h"
#include "JackCompilerDeps.h"
#include <iostream>
#include <unistd.h>
#include <fcntl.h>
#include <math.h>
#define JACK_GOLDFISH_BUFFER_SIZE 4096
namespace Jack
{
static char const * const kAudioDeviceName = "/dev/eac";
int JackGoldfishDriver::Open(jack_nframes_t buffer_size,
jack_nframes_t samplerate,
bool capturing,
bool playing,
int inchannels,
int outchannels,
bool monitor,
const char* capture_driver_uid,
const char* playback_driver_uid,
jack_nframes_t capture_latency,
jack_nframes_t playback_latency) {
jack_log("JackGoldfishDriver::Open");
// Generic JackAudioDriver Open
if (JackAudioDriver::Open(buffer_size, samplerate, capturing, playing, inchannels, outchannels, monitor,
capture_driver_uid, playback_driver_uid, capture_latency, playback_latency) != 0) {
return -1;
}
mFd = ::open(kAudioDeviceName, O_RDWR);
jack_log("JackGoldfishDriver::Open(mFd=%d)", mFd);
if (!mBuffer)
mBuffer = (short *) malloc(sizeof(short) * JACK_GOLDFISH_BUFFER_SIZE * 2);
//JackAudioDriver::SetBufferSize(buffer_size);
//JackAudioDriver::SetSampleRate(samplerate);
return 0;
}
int JackGoldfishDriver::Close() {
jack_log("JackGoldfishDriver::Close");
// Generic audio driver close
int res = JackAudioDriver::Close();
if (mFd >= 0) ::close(mFd);
if (mBuffer) {
free(mBuffer);
mBuffer = NULL;
}
return res;
}
int JackGoldfishDriver::Read() {
jack_log("JackGoldfishDriver::Read");
for (int i = 0; i < fCaptureChannels; i++) {
//silence
memset(GetInputBuffer(i), 0, sizeof(jack_default_audio_sample_t) * JACK_GOLDFISH_BUFFER_SIZE /* fEngineControl->fBufferSize */);
}
return 0;
}
int JackGoldfishDriver::Write() {
jack_log("JackGoldfishDriver::Write");
//write(mFd, GetOutputBuffer(i), sizeof(jack_default_audio_sample_t) * fEngineControl->fBufferSize);
jack_default_audio_sample_t* outputBuffer_1 = GetOutputBuffer(0);
jack_default_audio_sample_t* outputBuffer_2 = GetOutputBuffer(1);
for(int i=0, j=0; i<JACK_GOLDFISH_BUFFER_SIZE /* fEngineControl->fBufferSize */; i++) {
//convert float to short
*(mBuffer + j) = (short) (*(outputBuffer_1 + i) * 32640); j++;
*(mBuffer + j) = (short) (*(outputBuffer_2 + i) * 32640); j++;
}
write(mFd, mBuffer, sizeof(short) * JACK_GOLDFISH_BUFFER_SIZE * 2);
return 0;
}
int JackGoldfishDriver::SetBufferSize(jack_nframes_t buffer_size) {
jack_log("JackGoldfishDriver::SetBufferSize");
JackAudioDriver::SetBufferSize(buffer_size);
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("goldfish", JackDriverMaster, "Timer based backend", &filler);
value.ui = 2U;
jack_driver_descriptor_add_parameter(desc, &filler, "capture", 'C', JackDriverParamUInt, &value, NULL, "Number of capture ports", NULL);
jack_driver_descriptor_add_parameter(desc, &filler, "playback", 'P', JackDriverParamUInt, &value, NULL, "Number of playback ports", NULL);
value.ui = 44100U;
jack_driver_descriptor_add_parameter(desc, &filler, "rate", 'r', JackDriverParamUInt, &value, NULL, "Sample rate", NULL);
value.i = 0;
jack_driver_descriptor_add_parameter(desc, &filler, "monitor", 'm', JackDriverParamBool, &value, NULL, "Provide monitor ports for the output", NULL);
value.ui = JACK_GOLDFISH_BUFFER_SIZE;
jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", NULL);
value.ui = 21333U;
jack_driver_descriptor_add_parameter(desc, &filler, "wait", 'w', JackDriverParamUInt, &value, NULL, "Number of usecs to wait between engine processes", NULL);
return desc;
}
SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params) {
jack_nframes_t sample_rate = 44100;
jack_nframes_t buffer_size = JACK_GOLDFISH_BUFFER_SIZE;
unsigned int capture_ports = 2;
unsigned int playback_ports = 2;
int wait_time = 0;
const JSList * node;
const jack_driver_param_t * param;
bool monitor = false;
for (node = params; node; node = jack_slist_next (node)) {
param = (const jack_driver_param_t *) node->data;
switch (param->character) {
case 'C':
capture_ports = param->value.ui;
break;
case 'P':
playback_ports = param->value.ui;
break;
case 'r':
sample_rate = param->value.ui;
break;
case 'p':
buffer_size = param->value.ui;
break;
case 'w':
wait_time = param->value.ui;
break;
case 'm':
monitor = param->value.i;
break;
}
}
if (wait_time > 0) {
buffer_size = lroundf((wait_time * sample_rate) / 1000000.0f);
if (buffer_size > BUFFER_SIZE_MAX) {
buffer_size = BUFFER_SIZE_MAX;
jack_error("Buffer size set to %d", BUFFER_SIZE_MAX);
}
}
Jack::JackDriverClientInterface* driver = new Jack::JackThreadedDriver(new Jack::JackGoldfishDriver("system", "goldfish_pcm", engine, table));
if (driver->Open(buffer_size, sample_rate, 1, 1, capture_ports, playback_ports, monitor, "goldfish", "goldfish", 0, 0) == 0) {
return driver;
} else {
delete driver;
return NULL;
}
}
#ifdef __cplusplus
}
#endif
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