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 "sdk/android/src/jni/audio_device/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 namespace jni {
21
22 // Returns a string representation given an integer SL_RESULT_XXX code.
23 // The mapping can be found in <SLES/OpenSLES.h>.
GetSLErrorString(size_t code)24 const char* GetSLErrorString(size_t code) {
25 static const char* sl_error_strings[] = {
26 "SL_RESULT_SUCCESS", // 0
27 "SL_RESULT_PRECONDITIONS_VIOLATED", // 1
28 "SL_RESULT_PARAMETER_INVALID", // 2
29 "SL_RESULT_MEMORY_FAILURE", // 3
30 "SL_RESULT_RESOURCE_ERROR", // 4
31 "SL_RESULT_RESOURCE_LOST", // 5
32 "SL_RESULT_IO_ERROR", // 6
33 "SL_RESULT_BUFFER_INSUFFICIENT", // 7
34 "SL_RESULT_CONTENT_CORRUPTED", // 8
35 "SL_RESULT_CONTENT_UNSUPPORTED", // 9
36 "SL_RESULT_CONTENT_NOT_FOUND", // 10
37 "SL_RESULT_PERMISSION_DENIED", // 11
38 "SL_RESULT_FEATURE_UNSUPPORTED", // 12
39 "SL_RESULT_INTERNAL_ERROR", // 13
40 "SL_RESULT_UNKNOWN_ERROR", // 14
41 "SL_RESULT_OPERATION_ABORTED", // 15
42 "SL_RESULT_CONTROL_LOST", // 16
43 };
44
45 if (code >= arraysize(sl_error_strings)) {
46 return "SL_RESULT_UNKNOWN_ERROR";
47 }
48 return sl_error_strings[code];
49 }
50
CreatePCMConfiguration(size_t channels,int sample_rate,size_t bits_per_sample)51 SLDataFormat_PCM CreatePCMConfiguration(size_t channels,
52 int sample_rate,
53 size_t bits_per_sample) {
54 RTC_CHECK_EQ(bits_per_sample, SL_PCMSAMPLEFORMAT_FIXED_16);
55 SLDataFormat_PCM format;
56 format.formatType = SL_DATAFORMAT_PCM;
57 format.numChannels = static_cast<SLuint32>(channels);
58 // Note that, the unit of sample rate is actually in milliHertz and not Hertz.
59 switch (sample_rate) {
60 case 8000:
61 format.samplesPerSec = SL_SAMPLINGRATE_8;
62 break;
63 case 16000:
64 format.samplesPerSec = SL_SAMPLINGRATE_16;
65 break;
66 case 22050:
67 format.samplesPerSec = SL_SAMPLINGRATE_22_05;
68 break;
69 case 32000:
70 format.samplesPerSec = SL_SAMPLINGRATE_32;
71 break;
72 case 44100:
73 format.samplesPerSec = SL_SAMPLINGRATE_44_1;
74 break;
75 case 48000:
76 format.samplesPerSec = SL_SAMPLINGRATE_48;
77 break;
78 case 64000:
79 format.samplesPerSec = SL_SAMPLINGRATE_64;
80 break;
81 case 88200:
82 format.samplesPerSec = SL_SAMPLINGRATE_88_2;
83 break;
84 case 96000:
85 format.samplesPerSec = SL_SAMPLINGRATE_96;
86 break;
87 default:
88 RTC_CHECK(false) << "Unsupported sample rate: " << sample_rate;
89 break;
90 }
91 format.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
92 format.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
93 format.endianness = SL_BYTEORDER_LITTLEENDIAN;
94 if (format.numChannels == 1) {
95 format.channelMask = SL_SPEAKER_FRONT_CENTER;
96 } else if (format.numChannels == 2) {
97 format.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
98 } else {
99 RTC_CHECK(false) << "Unsupported number of channels: "
100 << format.numChannels;
101 }
102 return format;
103 }
104
OpenSLEngineManager()105 OpenSLEngineManager::OpenSLEngineManager() {
106 thread_checker_.Detach();
107 }
108
GetOpenSLEngine()109 SLObjectItf OpenSLEngineManager::GetOpenSLEngine() {
110 RTC_LOG(LS_INFO) << "GetOpenSLEngine";
111 RTC_DCHECK(thread_checker_.IsCurrent());
112 // OpenSL ES for Android only supports a single engine per application.
113 // If one already has been created, return existing object instead of
114 // creating a new.
115 if (engine_object_.Get() != nullptr) {
116 RTC_LOG(LS_WARNING)
117 << "The OpenSL ES engine object has already been created";
118 return engine_object_.Get();
119 }
120 // Create the engine object in thread safe mode.
121 const SLEngineOption option[] = {
122 {SL_ENGINEOPTION_THREADSAFE, static_cast<SLuint32>(SL_BOOLEAN_TRUE)}};
123 SLresult result =
124 slCreateEngine(engine_object_.Receive(), 1, option, 0, NULL, NULL);
125 if (result != SL_RESULT_SUCCESS) {
126 RTC_LOG(LS_ERROR) << "slCreateEngine() failed: "
127 << GetSLErrorString(result);
128 engine_object_.Reset();
129 return nullptr;
130 }
131 // Realize the SL Engine in synchronous mode.
132 result = engine_object_->Realize(engine_object_.Get(), SL_BOOLEAN_FALSE);
133 if (result != SL_RESULT_SUCCESS) {
134 RTC_LOG(LS_ERROR) << "Realize() failed: " << GetSLErrorString(result);
135 engine_object_.Reset();
136 return nullptr;
137 }
138 // Finally return the SLObjectItf interface of the engine object.
139 return engine_object_.Get();
140 }
141
142 } // namespace jni
143
144 } // namespace webrtc
145