1/*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26// define this with a later version of ALSA than 0.9.0rc3
27// (starting from 1.0.0 it became default behaviour)
28#define ALSA_PCM_NEW_HW_PARAMS_API
29#include <alsa/asoundlib.h>
30#include "Utilities.h"
31
32#ifndef PLATFORM_API_LINUXOS_ALSA_PCMUTILS_H_INCLUDED
33#define PLATFORM_API_LINUXOS_ALSA_PCMUTILS_H_INCLUDED
34
35// if this is defined, use plughw: devices
36#define ALSA_PCM_USE_PLUGHW
37//#undef ALSA_PCM_USE_PLUGHW
38
39
40// maximum number of channels that is listed in the formats. If more, than
41// just -1 for channel count is used.
42#define MAXIMUM_LISTED_CHANNELS 32
43
44typedef struct tag_ALSA_AudioDeviceDescription {
45 int index; // in
46 int strLen; // in
47 INT32* deviceID; // out
48 int* maxSimultaneousLines; // out
49 char* name; // out
50 char* vendor; // out
51 char* description; // out
52 char* version; // out
53} ALSA_AudioDeviceDescription;
54
55
56
57int getAudioDeviceCount();
58int getAudioDeviceDescriptionByIndex(ALSA_AudioDeviceDescription* desc);
59
60// returns ALSA error code, or 0 if successful
61int openPCMfromDeviceID(int deviceID, snd_pcm_t** handle, int isSource, int hardware);
62
63// returns 1 if successful
64// enc: 0 for PCM, 1 for ULAW, 2 for ALAW (see DirectAudio.h)
65int getFormatFromAlsaFormat(snd_pcm_format_t alsaFormat,
66 int* sampleSizeInBytes, int* significantBits,
67 int* isSigned, int* isBigEndian, int* enc);
68
69int getAlsaFormatFromFormat(snd_pcm_format_t* alsaFormat,
70 int sampleSizeInBytes, int significantBits,
71 int isSigned, int isBigEndian, int enc);
72
73#endif // PLATFORM_API_LINUXOS_ALSA_PCMUTILS_H_INCLUDED
74