213 lines
7.1 KiB
C++
213 lines
7.1 KiB
C++
/*
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Copyright (C) 2001 Paul Davis
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Copyright (C) 2004-2008 Grame
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Copyright (C) 2013 Samsung Electronics
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "JackGoldfishDriver.h"
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#include "JackDriverLoader.h"
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#include "JackThreadedDriver.h"
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#include "JackEngineControl.h"
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#include "JackGraphManager.h"
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#include "JackCompilerDeps.h"
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#include <iostream>
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#include <unistd.h>
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#include <fcntl.h>
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#include <math.h>
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#define JACK_GOLDFISH_BUFFER_SIZE 4096
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namespace Jack
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{
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static char const * const kAudioDeviceName = "/dev/eac";
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int JackGoldfishDriver::Open(jack_nframes_t buffer_size,
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jack_nframes_t samplerate,
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bool capturing,
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bool playing,
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int inchannels,
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int outchannels,
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bool monitor,
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const char* capture_driver_uid,
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const char* playback_driver_uid,
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jack_nframes_t capture_latency,
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jack_nframes_t playback_latency) {
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jack_log("JackGoldfishDriver::Open");
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// Generic JackAudioDriver Open
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if (JackAudioDriver::Open(buffer_size, samplerate, capturing, playing, inchannels, outchannels, monitor,
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capture_driver_uid, playback_driver_uid, capture_latency, playback_latency) != 0) {
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return -1;
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}
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mFd = ::open(kAudioDeviceName, O_RDWR);
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jack_log("JackGoldfishDriver::Open(mFd=%d)", mFd);
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if (!mBuffer)
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mBuffer = (short *) malloc(sizeof(short) * JACK_GOLDFISH_BUFFER_SIZE * 2);
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//JackAudioDriver::SetBufferSize(buffer_size);
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//JackAudioDriver::SetSampleRate(samplerate);
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return 0;
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}
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int JackGoldfishDriver::Close() {
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jack_log("JackGoldfishDriver::Close");
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// Generic audio driver close
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int res = JackAudioDriver::Close();
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if (mFd >= 0) ::close(mFd);
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if (mBuffer) {
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free(mBuffer);
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mBuffer = NULL;
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}
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return res;
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}
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int JackGoldfishDriver::Read() {
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jack_log("JackGoldfishDriver::Read");
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for (int i = 0; i < fCaptureChannels; i++) {
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//silence
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memset(GetInputBuffer(i), 0, sizeof(jack_default_audio_sample_t) * JACK_GOLDFISH_BUFFER_SIZE /* fEngineControl->fBufferSize */);
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}
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return 0;
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}
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int JackGoldfishDriver::Write() {
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jack_log("JackGoldfishDriver::Write");
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//write(mFd, GetOutputBuffer(i), sizeof(jack_default_audio_sample_t) * fEngineControl->fBufferSize);
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jack_default_audio_sample_t* outputBuffer_1 = GetOutputBuffer(0);
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jack_default_audio_sample_t* outputBuffer_2 = GetOutputBuffer(1);
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for(int i=0, j=0; i<JACK_GOLDFISH_BUFFER_SIZE /* fEngineControl->fBufferSize */; i++) {
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//convert float to short
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*(mBuffer + j) = (short) (*(outputBuffer_1 + i) * 32640); j++;
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*(mBuffer + j) = (short) (*(outputBuffer_2 + i) * 32640); j++;
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}
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write(mFd, mBuffer, sizeof(short) * JACK_GOLDFISH_BUFFER_SIZE * 2);
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return 0;
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}
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int JackGoldfishDriver::SetBufferSize(jack_nframes_t buffer_size) {
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jack_log("JackGoldfishDriver::SetBufferSize");
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JackAudioDriver::SetBufferSize(buffer_size);
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return 0;
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}
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} // end of namespace
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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SERVER_EXPORT jack_driver_desc_t * driver_get_descriptor () {
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jack_driver_desc_t * desc;
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jack_driver_desc_filler_t filler;
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jack_driver_param_value_t value;
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desc = jack_driver_descriptor_construct("goldfish", JackDriverMaster, "Timer based backend", &filler);
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value.ui = 2U;
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jack_driver_descriptor_add_parameter(desc, &filler, "capture", 'C', JackDriverParamUInt, &value, NULL, "Number of capture ports", NULL);
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jack_driver_descriptor_add_parameter(desc, &filler, "playback", 'P', JackDriverParamUInt, &value, NULL, "Number of playback ports", NULL);
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value.ui = 44100U;
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jack_driver_descriptor_add_parameter(desc, &filler, "rate", 'r', JackDriverParamUInt, &value, NULL, "Sample rate", NULL);
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value.i = 0;
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jack_driver_descriptor_add_parameter(desc, &filler, "monitor", 'm', JackDriverParamBool, &value, NULL, "Provide monitor ports for the output", NULL);
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value.ui = JACK_GOLDFISH_BUFFER_SIZE;
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jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", NULL);
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value.ui = 21333U;
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jack_driver_descriptor_add_parameter(desc, &filler, "wait", 'w', JackDriverParamUInt, &value, NULL, "Number of usecs to wait between engine processes", NULL);
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return desc;
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}
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SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params) {
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jack_nframes_t sample_rate = 44100;
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jack_nframes_t buffer_size = JACK_GOLDFISH_BUFFER_SIZE;
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unsigned int capture_ports = 2;
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unsigned int playback_ports = 2;
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int wait_time = 0;
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const JSList * node;
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const jack_driver_param_t * param;
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bool monitor = false;
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for (node = params; node; node = jack_slist_next (node)) {
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param = (const jack_driver_param_t *) node->data;
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switch (param->character) {
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case 'C':
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capture_ports = param->value.ui;
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break;
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case 'P':
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playback_ports = param->value.ui;
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break;
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case 'r':
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sample_rate = param->value.ui;
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break;
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case 'p':
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buffer_size = param->value.ui;
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break;
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case 'w':
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wait_time = param->value.ui;
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break;
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case 'm':
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monitor = param->value.i;
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break;
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}
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}
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if (wait_time > 0) {
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buffer_size = lroundf((wait_time * sample_rate) / 1000000.0f);
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if (buffer_size > BUFFER_SIZE_MAX) {
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buffer_size = BUFFER_SIZE_MAX;
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jack_error("Buffer size set to %d", BUFFER_SIZE_MAX);
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}
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}
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Jack::JackDriverClientInterface* driver = new Jack::JackThreadedDriver(new Jack::JackGoldfishDriver("system", "goldfish_pcm", engine, table));
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if (driver->Open(buffer_size, sample_rate, 1, 1, capture_ports, playback_ports, monitor, "goldfish", "goldfish", 0, 0) == 0) {
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return driver;
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} else {
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delete driver;
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return NULL;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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