1 /*
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "modules/audio_device/android/opensles_common.h"
12
13 #include <SLES/OpenSLES.h>
14
15 #include "rtc_base/arraysize.h"
16 #include "rtc_base/checks.h"
17
18 namespace webrtc {
19
20 // Returns a string representation given an integer SL_RESULT_XXX code.
21 // The mapping can be found in <SLES/OpenSLES.h>.
GetSLErrorString(size_t code)22 const char* GetSLErrorString(size_t code) {
23 static const char* sl_error_strings[] = {
24 "SL_RESULT_SUCCESS", // 0
25 "SL_RESULT_PRECONDITIONS_VIOLATED", // 1
26 "SL_RESULT_PARAMETER_INVALID", // 2
27 "SL_RESULT_MEMORY_FAILURE", // 3
28 "SL_RESULT_RESOURCE_ERROR", // 4
29 "SL_RESULT_RESOURCE_LOST", // 5
30 "SL_RESULT_IO_ERROR", // 6
31 "SL_RESULT_BUFFER_INSUFFICIENT", // 7
32 "SL_RESULT_CONTENT_CORRUPTED", // 8
33 "SL_RESULT_CONTENT_UNSUPPORTED", // 9
34 "SL_RESULT_CONTENT_NOT_FOUND", // 10
35 "SL_RESULT_PERMISSION_DENIED", // 11
36 "SL_RESULT_FEATURE_UNSUPPORTED", // 12
37 "SL_RESULT_INTERNAL_ERROR", // 13
38 "SL_RESULT_UNKNOWN_ERROR", // 14
39 "SL_RESULT_OPERATION_ABORTED", // 15
40 "SL_RESULT_CONTROL_LOST", // 16
41 };
42
43 if (code >= arraysize(sl_error_strings)) {
44 return "SL_RESULT_UNKNOWN_ERROR";
45 }
46 return sl_error_strings[code];
47 }
48
CreatePCMConfiguration(size_t channels,int sample_rate,size_t bits_per_sample)49 SLDataFormat_PCM CreatePCMConfiguration(size_t channels,
50 int sample_rate,
51 size_t bits_per_sample) {
52 RTC_CHECK_EQ(bits_per_sample, SL_PCMSAMPLEFORMAT_FIXED_16);
53 SLDataFormat_PCM format;
54 format.formatType = SL_DATAFORMAT_PCM;
55 format.numChannels = static_cast<SLuint32>(channels);
56 // Note that, the unit of sample rate is actually in milliHertz and not Hertz.
57 switch (sample_rate) {
58 case 8000:
59 format.samplesPerSec = SL_SAMPLINGRATE_8;
60 break;
61 case 16000:
62 format.samplesPerSec = SL_SAMPLINGRATE_16;
63 break;
64 case 22050:
65 format.samplesPerSec = SL_SAMPLINGRATE_22_05;
66 break;
67 case 32000:
68 format.samplesPerSec = SL_SAMPLINGRATE_32;
69 break;
70 case 44100:
71 format.samplesPerSec = SL_SAMPLINGRATE_44_1;
72 break;
73 case 48000:
74 format.samplesPerSec = SL_SAMPLINGRATE_48;
75 break;
76 case 64000:
77 format.samplesPerSec = SL_SAMPLINGRATE_64;
78 break;
79 case 88200:
80 format.samplesPerSec = SL_SAMPLINGRATE_88_2;
81 break;
82 case 96000:
83 format.samplesPerSec = SL_SAMPLINGRATE_96;
84 break;
85 default:
86 RTC_CHECK(false) << "Unsupported sample rate: " << sample_rate;
87 break;
88 }
89 format.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
90 format.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
91 format.endianness = SL_BYTEORDER_LITTLEENDIAN;
92 if (format.numChannels == 1) {
93 format.channelMask = SL_SPEAKER_FRONT_CENTER;
94 } else if (format.numChannels == 2) {
95 format.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
96 } else {
97 RTC_CHECK(false) << "Unsupported number of channels: "
98 << format.numChannels;
99 }
100 return format;
101 }
102
103 } // namespace webrtc
104