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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2024 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include "log.h"
#include "pcm.h"
#include "system_java.h"
struct PcmDeviceStruct {
JNIEnv *env;
jobject device;
};
static jclass pcmDeviceClass = NULL;
static int
findPcmDeviceClass (JNIEnv *env) {
return findJavaClass(env, &pcmDeviceClass, JAVA_OBJ_BRLTTY("PcmDevice"));
}
PcmDevice *
openPcmDevice (int errorLevel, const char *device) {
PcmDevice *pcm = malloc(sizeof(*pcm));
if (pcm) {
memset(pcm, 0, sizeof(*pcm));
pcm->env = getJavaNativeInterface();
pcm->device = NULL;
if (findPcmDeviceClass(pcm->env)) {
static jmethodID constructor = 0;
if (findJavaConstructor(pcm->env, &constructor, pcmDeviceClass,
JAVA_SIG_CONSTRUCTOR())) {
jobject localReference = (*pcm->env)->NewObject(pcm->env, pcmDeviceClass, constructor);
if (!clearJavaException(pcm->env, 1)) {
jobject globalReference = (*pcm->env)->NewGlobalRef(pcm->env, localReference);
(*pcm->env)->DeleteLocalRef(pcm->env, localReference);
localReference = NULL;
if (globalReference) {
pcm->device = globalReference;
return pcm;
} else {
logMallocError();
clearJavaException(pcm->env, 0);
}
}
}
}
free(pcm);
} else {
logMallocError();
}
return NULL;
}
void
closePcmDevice (PcmDevice *pcm) {
if (pcm) {
if (pcm->device) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "close",
JAVA_SIG_METHOD(JAVA_SIG_VOID,
))) {
(*pcm->env)->CallVoidMethod(pcm->env, pcm->device, method);
clearJavaException(pcm->env, 1);
}
}
(*pcm->env)->DeleteGlobalRef(pcm->env, pcm->device);
}
free(pcm);
}
}
int
writePcmData (PcmDevice *pcm, const unsigned char *buffer, int count) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "write",
JAVA_SIG_METHOD(JAVA_SIG_BOOLEAN,
JAVA_SIG_ARRAY(JAVA_SIG_SHORT) // samples
))) {
jint size = count / 2;
jshortArray jSamples = (*pcm->env)->NewShortArray(pcm->env, size);
if (jSamples) {
typedef union {
const unsigned char *bytes;
const int16_t *actual;
} Samples;
Samples samples = {
.bytes = buffer
};
(*pcm->env)->SetShortArrayRegion(
pcm->env, jSamples, 0, size, samples.actual
);
if (!clearJavaException(pcm->env, 1)) {
jboolean result = (*pcm->env)->CallBooleanMethod(
pcm->env, pcm->device, method, jSamples
);
(*pcm->env)->DeleteLocalRef(pcm->env, jSamples);
jSamples = NULL;
if (!clearJavaException(pcm->env, 1)) {
if (result == JNI_TRUE) {
return 1;
}
}
}
} else {
logMallocError();
clearJavaException(pcm->env, 0);
}
}
}
return 0;
}
int
getPcmBlockSize (PcmDevice *pcm) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "getBufferSize",
JAVA_SIG_METHOD(JAVA_SIG_INT,
))) {
jint result = (*pcm->env)->CallIntMethod(pcm->env, pcm->device, method);
if (!clearJavaException(pcm->env, 1)) return result;
}
}
return 0X100;
}
int
getPcmSampleRate (PcmDevice *pcm) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "getSampleRate",
JAVA_SIG_METHOD(JAVA_SIG_INT,
))) {
jint result = (*pcm->env)->CallIntMethod(pcm->env, pcm->device, method);
if (!clearJavaException(pcm->env, 1)) return result;
}
}
return 8000;
}
int
setPcmSampleRate (PcmDevice *pcm, int rate) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "setSampleRate",
JAVA_SIG_METHOD(JAVA_SIG_VOID,
JAVA_SIG_INT // rate
))) {
(*pcm->env)->CallVoidMethod(pcm->env, pcm->device, method, rate);
clearJavaException(pcm->env, 1);
}
}
return getPcmSampleRate(pcm);
}
int
getPcmChannelCount (PcmDevice *pcm) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "getChannelCount",
JAVA_SIG_METHOD(JAVA_SIG_INT,
))) {
jint result = (*pcm->env)->CallIntMethod(pcm->env, pcm->device, method);
if (!clearJavaException(pcm->env, 1)) return result;
}
}
return 1;
}
int
setPcmChannelCount (PcmDevice *pcm, int channels) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "setChannelCount",
JAVA_SIG_METHOD(JAVA_SIG_VOID,
JAVA_SIG_INT // count
))) {
(*pcm->env)->CallVoidMethod(pcm->env, pcm->device, method, channels);
clearJavaException(pcm->env, 1);
}
}
return getPcmChannelCount(pcm);
}
PcmAmplitudeFormat
getPcmAmplitudeFormat (PcmDevice *pcm) {
return PCM_FMT_S16N;
}
PcmAmplitudeFormat
setPcmAmplitudeFormat (PcmDevice *pcm, PcmAmplitudeFormat format) {
return getPcmAmplitudeFormat(pcm);
}
void
pushPcmOutput (PcmDevice *pcm) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "push",
JAVA_SIG_METHOD(JAVA_SIG_VOID,
))) {
(*pcm->env)->CallVoidMethod(pcm->env, pcm->device, method);
clearJavaException(pcm->env, 1);
}
}
}
void
awaitPcmOutput (PcmDevice *pcm) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "await",
JAVA_SIG_METHOD(JAVA_SIG_VOID,
))) {
(*pcm->env)->CallVoidMethod(pcm->env, pcm->device, method);
clearJavaException(pcm->env, 1);
}
}
}
void
cancelPcmOutput (PcmDevice *pcm) {
if (findPcmDeviceClass(pcm->env)) {
static jmethodID method = 0;
if (findJavaInstanceMethod(pcm->env, &method, pcmDeviceClass, "cancel",
JAVA_SIG_METHOD(JAVA_SIG_VOID,
))) {
(*pcm->env)->CallVoidMethod(pcm->env, pcm->device, method);
clearJavaException(pcm->env, 1);
}
}
}
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