| /* |
| * Copyright (c) 2003, 2007, 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]='['; |
| getDeviceStringFromDeviceID(&buffer[2], deviceID, usePlugHw, ALSA_PCM); |
| strcat(buffer, "]"); |
| 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 */ |
