--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/linux/native/libjsound/PLATFORM_API_LinuxOS_ALSA_CommonUtils.c Fri Mar 23 09:51:02 2018 +0100
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+//#define USE_ERROR
+//#define USE_TRACE
+
+#include "PLATFORM_API_LinuxOS_ALSA_CommonUtils.h"
+
+static void alsaDebugOutput(const char *file, int line, const char *function, int err, const char *fmt, ...) {
+#ifdef USE_ERROR
+ va_list args;
+ va_start(args, fmt);
+ printf("%s:%d function %s: error %d: %s\n", file, line, function, err, snd_strerror(err));
+ if (strlen(fmt) > 0) {
+ vprintf(fmt, args);
+ }
+ va_end(args);
+#endif
+}
+
+static int alsa_inited = 0;
+static int alsa_enumerate_pcm_subdevices = FALSE; // default: no
+static int alsa_enumerate_midi_subdevices = FALSE; // default: no
+
+/*
+ * Declare library specific JNI_Onload entry if static build
+ */
+DEF_STATIC_JNI_OnLoad
+
+void initAlsaSupport() {
+ char* enumerate;
+ if (!alsa_inited) {
+ alsa_inited = TRUE;
+ snd_lib_error_set_handler(&alsaDebugOutput);
+
+ enumerate = getenv(ENV_ENUMERATE_PCM_SUBDEVICES);
+ if (enumerate != NULL && strlen(enumerate) > 0
+ && (enumerate[0] != 'f') // false
+ && (enumerate[0] != 'F') // False
+ && (enumerate[0] != 'n') // no
+ && (enumerate[0] != 'N')) { // NO
+ alsa_enumerate_pcm_subdevices = TRUE;
+ }
+#ifdef ALSA_MIDI_ENUMERATE_SUBDEVICES
+ alsa_enumerate_midi_subdevices = TRUE;
+#endif
+ }
+}
+
+
+/* if true (non-zero), ALSA sub devices should be listed as separate devices
+ */
+int needEnumerateSubdevices(int isMidi) {
+ initAlsaSupport();
+ return isMidi ? alsa_enumerate_midi_subdevices
+ : alsa_enumerate_pcm_subdevices;
+}
+
+
+/*
+ * deviceID contains packed card, device and subdevice numbers
+ * each number takes 10 bits
+ * "default" device has id == ALSA_DEFAULT_DEVICE_ID
+ */
+UINT32 encodeDeviceID(int card, int device, int subdevice) {
+ return (((card & 0x3FF) << 20) | ((device & 0x3FF) << 10)
+ | (subdevice & 0x3FF)) + 1;
+}
+
+
+void decodeDeviceID(UINT32 deviceID, int* card, int* device, int* subdevice,
+ int isMidi) {
+ deviceID--;
+ *card = (deviceID >> 20) & 0x3FF;
+ *device = (deviceID >> 10) & 0x3FF;
+ if (needEnumerateSubdevices(isMidi)) {
+ *subdevice = deviceID & 0x3FF;
+ } else {
+ *subdevice = -1; // ALSA will choose any subdevices
+ }
+}
+
+
+void getDeviceString(char* buffer, int card, int device, int subdevice,
+ int usePlugHw, int isMidi) {
+ if (needEnumerateSubdevices(isMidi)) {
+ sprintf(buffer, "%s:%d,%d,%d",
+ usePlugHw ? ALSA_PLUGHARDWARE : ALSA_HARDWARE,
+ card, device, subdevice);
+ } else {
+ sprintf(buffer, "%s:%d,%d",
+ usePlugHw ? ALSA_PLUGHARDWARE : ALSA_HARDWARE,
+ card, device);
+ }
+}
+
+
+void getDeviceStringFromDeviceID(char* buffer, UINT32 deviceID,
+ int usePlugHw, int isMidi) {
+ int card, device, subdevice;
+
+ if (deviceID == ALSA_DEFAULT_DEVICE_ID) {
+ strcpy(buffer, ALSA_DEFAULT_DEVICE_NAME);
+ } else {
+ decodeDeviceID(deviceID, &card, &device, &subdevice, isMidi);
+ getDeviceString(buffer, card, device, subdevice, usePlugHw, isMidi);
+ }
+}
+
+
+static int hasGottenALSAVersion = FALSE;
+#define ALSAVersionString_LENGTH 200
+static char ALSAVersionString[ALSAVersionString_LENGTH];
+
+void getALSAVersion(char* buffer, int len) {
+ if (!hasGottenALSAVersion) {
+ // get alsa version from proc interface
+ FILE* file;
+ int curr, len, totalLen, inVersionString;
+ file = fopen(ALSA_VERSION_PROC_FILE, "r");
+ ALSAVersionString[0] = 0;
+ if (file) {
+ if (NULL != fgets(ALSAVersionString, ALSAVersionString_LENGTH, file)) {
+ // parse for version number
+ totalLen = strlen(ALSAVersionString);
+ inVersionString = FALSE;
+ len = 0;
+ curr = 0;
+ while (curr < totalLen) {
+ if (!inVersionString) {
+ // is this char the beginning of a version string ?
+ if (ALSAVersionString[curr] >= '0'
+ && ALSAVersionString[curr] <= '9') {
+ inVersionString = TRUE;
+ }
+ }
+ if (inVersionString) {
+ // the version string ends with white space
+ if (ALSAVersionString[curr] <= 32) {
+ break;
+ }
+ if (curr != len) {
+ // copy this char to the beginning of the string
+ ALSAVersionString[len] = ALSAVersionString[curr];
+ }
+ len++;
+ }
+ curr++;
+ }
+ // remove trailing dots
+ while ((len > 0) && (ALSAVersionString[len - 1] == '.')) {
+ len--;
+ }
+ // null terminate
+ ALSAVersionString[len] = 0;
+ }
+ fclose(file);
+ hasGottenALSAVersion = TRUE;
+ }
+ }
+ strncpy(buffer, ALSAVersionString, len);
+}
+
+
+/* end */