--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/linux/native/libjsound/PLATFORM_API_LinuxOS_ALSA_PCMUtils.c Fri Mar 23 09:51:02 2018 +0100
@@ -0,0 +1,292 @@
+/*
+ * Copyright (c) 2003, 2014, 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_PCMUtils.h"
+#include "PLATFORM_API_LinuxOS_ALSA_CommonUtils.h"
+
+
+
+// callback for iteration through devices
+// returns TRUE if iteration should continue
+// NOTE: cardinfo may be NULL (for "default" device)
+typedef int (*DeviceIteratorPtr)(UINT32 deviceID, snd_pcm_info_t* pcminfo,
+ snd_ctl_card_info_t* cardinfo, void *userData);
+
+// for each ALSA device, call iterator. userData is passed to the iterator
+// returns total number of iterations
+int iteratePCMDevices(DeviceIteratorPtr iterator, void* userData) {
+ int count = 0;
+ int subdeviceCount;
+ int card, dev, subDev;
+ char devname[16];
+ int err;
+ snd_ctl_t *handle;
+ snd_pcm_t *pcm;
+ snd_pcm_info_t* pcminfo;
+ snd_ctl_card_info_t *cardinfo, *defcardinfo = NULL;
+ UINT32 deviceID;
+ int doContinue = TRUE;
+
+ snd_pcm_info_malloc(&pcminfo);
+ snd_ctl_card_info_malloc(&cardinfo);
+
+ // 1st try "default" device
+ err = snd_pcm_open(&pcm, ALSA_DEFAULT_DEVICE_NAME,
+ SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+ if (err < 0) {
+ // try with the other direction
+ err = snd_pcm_open(&pcm, ALSA_DEFAULT_DEVICE_NAME,
+ SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
+ }
+ if (err < 0) {
+ ERROR1("ERROR: snd_pcm_open (\"default\"): %s\n", snd_strerror(err));
+ } else {
+ err = snd_pcm_info(pcm, pcminfo);
+ snd_pcm_close(pcm);
+ if (err < 0) {
+ ERROR1("ERROR: snd_pcm_info (\"default\"): %s\n",
+ snd_strerror(err));
+ } else {
+ // try to get card info
+ card = snd_pcm_info_get_card(pcminfo);
+ if (card >= 0) {
+ sprintf(devname, ALSA_HARDWARE_CARD, card);
+ if (snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK) >= 0) {
+ if (snd_ctl_card_info(handle, cardinfo) >= 0) {
+ defcardinfo = cardinfo;
+ }
+ snd_ctl_close(handle);
+ }
+ }
+ // call callback function for the device
+ if (iterator != NULL) {
+ doContinue = (*iterator)(ALSA_DEFAULT_DEVICE_ID, pcminfo,
+ defcardinfo, userData);
+ }
+ count++;
+ }
+ }
+
+ // iterate cards
+ card = -1;
+ while (doContinue) {
+ if (snd_card_next(&card) < 0) {
+ break;
+ }
+ if (card < 0) {
+ break;
+ }
+ sprintf(devname, ALSA_HARDWARE_CARD, card);
+ TRACE1("Opening alsa device \"%s\"...\n", devname);
+ err = snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK);
+ if (err < 0) {
+ ERROR2("ERROR: snd_ctl_open, card=%d: %s\n",
+ card, snd_strerror(err));
+ } else {
+ err = snd_ctl_card_info(handle, cardinfo);
+ if (err < 0) {
+ ERROR2("ERROR: snd_ctl_card_info, card=%d: %s\n",
+ card, snd_strerror(err));
+ } else {
+ dev = -1;
+ while (doContinue) {
+ if (snd_ctl_pcm_next_device(handle, &dev) < 0) {
+ ERROR0("snd_ctl_pcm_next_device\n");
+ }
+ if (dev < 0) {
+ break;
+ }
+ snd_pcm_info_set_device(pcminfo, dev);
+ snd_pcm_info_set_subdevice(pcminfo, 0);
+ snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
+ err = snd_ctl_pcm_info(handle, pcminfo);
+ if (err == -ENOENT) {
+ // try with the other direction
+ snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_CAPTURE);
+ err = snd_ctl_pcm_info(handle, pcminfo);
+ }
+ if (err < 0) {
+ if (err != -ENOENT) {
+ ERROR2("ERROR: snd_ctl_pcm_info, card=%d: %s",
+ card, snd_strerror(err));
+ }
+ } else {
+ subdeviceCount = needEnumerateSubdevices(ALSA_PCM) ?
+ snd_pcm_info_get_subdevices_count(pcminfo) : 1;
+ if (iterator!=NULL) {
+ for (subDev = 0; subDev < subdeviceCount; subDev++) {
+ deviceID = encodeDeviceID(card, dev, subDev);
+ doContinue = (*iterator)(deviceID, pcminfo,
+ cardinfo, userData);
+ count++;
+ if (!doContinue) {
+ break;
+ }
+ }
+ } else {
+ count += subdeviceCount;
+ }
+ }
+ } // of while(doContinue)
+ }
+ snd_ctl_close(handle);
+ }
+ }
+ snd_ctl_card_info_free(cardinfo);
+ snd_pcm_info_free(pcminfo);
+ return count;
+}
+
+int getAudioDeviceCount() {
+ initAlsaSupport();
+ return iteratePCMDevices(NULL, NULL);
+}
+
+int deviceInfoIterator(UINT32 deviceID, snd_pcm_info_t* pcminfo,
+ snd_ctl_card_info_t* cardinfo, void* userData) {
+ char buffer[300];
+ ALSA_AudioDeviceDescription* desc = (ALSA_AudioDeviceDescription*)userData;
+#ifdef ALSA_PCM_USE_PLUGHW
+ int usePlugHw = 1;
+#else
+ int usePlugHw = 0;
+#endif
+
+ initAlsaSupport();
+ if (desc->index == 0) {
+ // we found the device with correct index
+ *(desc->maxSimultaneousLines) = needEnumerateSubdevices(ALSA_PCM) ?
+ 1 : snd_pcm_info_get_subdevices_count(pcminfo);
+ *desc->deviceID = deviceID;
+ buffer[0]=' '; buffer[1]='[';
+ // buffer[300] is enough to store the actual device string w/o overrun
+ getDeviceStringFromDeviceID(&buffer[2], deviceID, usePlugHw, ALSA_PCM);
+ strncat(buffer, "]", sizeof(buffer) - strlen(buffer) - 1);
+ strncpy(desc->name,
+ (cardinfo != NULL)
+ ? snd_ctl_card_info_get_id(cardinfo)
+ : snd_pcm_info_get_id(pcminfo),
+ desc->strLen - strlen(buffer));
+ strncat(desc->name, buffer, desc->strLen - strlen(desc->name));
+ strncpy(desc->vendor, "ALSA (http://www.alsa-project.org)", desc->strLen);
+ strncpy(desc->description,
+ (cardinfo != NULL)
+ ? snd_ctl_card_info_get_name(cardinfo)
+ : snd_pcm_info_get_name(pcminfo),
+ desc->strLen);
+ strncat(desc->description, ", ", desc->strLen - strlen(desc->description));
+ strncat(desc->description, snd_pcm_info_get_id(pcminfo), desc->strLen - strlen(desc->description));
+ strncat(desc->description, ", ", desc->strLen - strlen(desc->description));
+ strncat(desc->description, snd_pcm_info_get_name(pcminfo), desc->strLen - strlen(desc->description));
+ getALSAVersion(desc->version, desc->strLen);
+ TRACE4("Returning %s, %s, %s, %s\n", desc->name, desc->vendor, desc->description, desc->version);
+ return FALSE; // do not continue iteration
+ }
+ desc->index--;
+ return TRUE;
+}
+
+// returns 0 if successful
+int openPCMfromDeviceID(int deviceID, snd_pcm_t** handle, int isSource, int hardware) {
+ char buffer[200];
+ int ret;
+
+ initAlsaSupport();
+ getDeviceStringFromDeviceID(buffer, deviceID, !hardware, ALSA_PCM);
+
+ TRACE1("Opening ALSA device %s\n", buffer);
+ ret = snd_pcm_open(handle, buffer,
+ isSource?SND_PCM_STREAM_PLAYBACK:SND_PCM_STREAM_CAPTURE,
+ SND_PCM_NONBLOCK);
+ if (ret != 0) {
+ ERROR1("snd_pcm_open returned error code %d \n", ret);
+ *handle = NULL;
+ }
+ return ret;
+}
+
+
+int getAudioDeviceDescriptionByIndex(ALSA_AudioDeviceDescription* desc) {
+ initAlsaSupport();
+ TRACE1(" getAudioDeviceDescriptionByIndex(mixerIndex = %d\n", desc->index);
+ iteratePCMDevices(&deviceInfoIterator, desc);
+ return (desc->index == 0)?TRUE:FALSE;
+}
+
+// returns 1 if successful
+// enc: 0 for PCM, 1 for ULAW, 2 for ALAW (see DirectAudio.h)
+int getFormatFromAlsaFormat(snd_pcm_format_t alsaFormat,
+ int* sampleSizeInBytes, int* significantBits,
+ int* isSigned, int* isBigEndian, int* enc) {
+
+ *sampleSizeInBytes = (snd_pcm_format_physical_width(alsaFormat) + 7) / 8;
+ *significantBits = snd_pcm_format_width(alsaFormat);
+
+ // defaults
+ *enc = 0; // PCM
+ *isSigned = (snd_pcm_format_signed(alsaFormat) > 0);
+ *isBigEndian = (snd_pcm_format_big_endian(alsaFormat) > 0);
+
+ // non-PCM formats
+ if (alsaFormat == SND_PCM_FORMAT_MU_LAW) { // Mu-Law
+ *sampleSizeInBytes = 8; *enc = 1; *significantBits = *sampleSizeInBytes;
+ }
+ else if (alsaFormat == SND_PCM_FORMAT_A_LAW) { // A-Law
+ *sampleSizeInBytes = 8; *enc = 2; *significantBits = *sampleSizeInBytes;
+ }
+ else if (snd_pcm_format_linear(alsaFormat) < 1) {
+ return 0;
+ }
+ return (*sampleSizeInBytes > 0);
+}
+
+// returns 1 if successful
+int getAlsaFormatFromFormat(snd_pcm_format_t* alsaFormat,
+ int sampleSizeInBytes, int significantBits,
+ int isSigned, int isBigEndian, int enc) {
+ *alsaFormat = SND_PCM_FORMAT_UNKNOWN;
+
+ if (enc == 0) {
+ *alsaFormat = snd_pcm_build_linear_format(significantBits,
+ sampleSizeInBytes * 8,
+ isSigned?0:1,
+ isBigEndian?1:0);
+ }
+ else if ((sampleSizeInBytes == 1) && (significantBits == 8)) {
+ if (enc == 1) { // ULAW
+ *alsaFormat = SND_PCM_FORMAT_MU_LAW;
+ }
+ else if (enc == 2) { // ALAW
+ *alsaFormat = SND_PCM_FORMAT_A_LAW;
+ }
+ }
+ return (*alsaFormat == SND_PCM_FORMAT_UNKNOWN)?0:1;
+}
+
+
+/* end */