| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "SL-Utils" |
| |
| #include "sl-utils.h" |
| #include <utils/Mutex.h> |
| |
| #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0])) |
| |
| // These will wind up in <SLES/OpenSLES_Android.h> |
| #define SL_ANDROID_SPEAKER_QUAD (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT \ |
| | SL_SPEAKER_BACK_LEFT | SL_SPEAKER_BACK_RIGHT) |
| |
| #define SL_ANDROID_SPEAKER_5DOT1 (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT \ |
| | SL_SPEAKER_FRONT_CENTER | SL_SPEAKER_LOW_FREQUENCY| SL_SPEAKER_BACK_LEFT \ |
| | SL_SPEAKER_BACK_RIGHT) |
| |
| #define SL_ANDROID_SPEAKER_7DOT1 (SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_SIDE_LEFT \ |
| |SL_SPEAKER_SIDE_RIGHT) |
| |
| namespace android { |
| |
| static Mutex gLock; |
| static SLObjectItf gEngineObject; |
| static unsigned gRefCount; |
| |
| static const char *gErrorStrings[] = { |
| "SL_RESULT_SUCCESS", // 0 |
| "SL_RESULT_PRECONDITIONS_VIOLATE", // 1 |
| "SL_RESULT_PARAMETER_INVALID", // 2 |
| "SL_RESULT_MEMORY_FAILURE", // 3 |
| "SL_RESULT_RESOURCE_ERROR", // 4 |
| "SL_RESULT_RESOURCE_LOST", // 5 |
| "SL_RESULT_IO_ERROR", // 6 |
| "SL_RESULT_BUFFER_INSUFFICIENT", // 7 |
| "SL_RESULT_CONTENT_CORRUPTED", // 8 |
| "SL_RESULT_CONTENT_UNSUPPORTED", // 9 |
| "SL_RESULT_CONTENT_NOT_FOUND", // 10 |
| "SL_RESULT_PERMISSION_DENIED", // 11 |
| "SL_RESULT_FEATURE_UNSUPPORTED", // 12 |
| "SL_RESULT_INTERNAL_ERROR", // 13 |
| "SL_RESULT_UNKNOWN_ERROR", // 14 |
| "SL_RESULT_OPERATION_ABORTED", // 15 |
| "SL_RESULT_CONTROL_LOST", // 16 |
| }; |
| |
| const char *getSLErrStr(int code) { |
| if ((size_t)code >= ARRAY_SIZE(gErrorStrings)) { |
| return "SL_RESULT_UNKNOWN"; |
| } |
| return gErrorStrings[code]; |
| } |
| |
| SLuint32 channelCountToMask(unsigned channelCount) { |
| switch (channelCount) { |
| case 1: |
| return SL_SPEAKER_FRONT_LEFT; // we prefer left over center |
| case 2: |
| return SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT; |
| case 3: |
| return SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT | SL_SPEAKER_FRONT_CENTER; |
| case 4: |
| return SL_ANDROID_SPEAKER_QUAD; |
| case 5: |
| return SL_ANDROID_SPEAKER_QUAD | SL_SPEAKER_FRONT_CENTER; |
| case 6: |
| return SL_ANDROID_SPEAKER_5DOT1; |
| case 7: |
| return SL_ANDROID_SPEAKER_5DOT1 | SL_SPEAKER_BACK_CENTER; |
| case 8: |
| return SL_ANDROID_SPEAKER_7DOT1; |
| default: |
| return 0; |
| } |
| } |
| |
| static SLObjectItf createEngine() { |
| static SLEngineOption EngineOption[] = { |
| (SLuint32) SL_ENGINEOPTION_THREADSAFE, |
| (SLuint32) SL_BOOLEAN_TRUE |
| }; |
| // create engine in thread-safe mode |
| SLObjectItf engine; |
| SLresult result = slCreateEngine(&engine, |
| 1 /* numOptions */, EngineOption /* pEngineOptions */, |
| 0 /* numInterfaces */, NULL /* pInterfaceIds */, NULL /* pInterfaceRequired */); |
| if (result != SL_RESULT_SUCCESS) { |
| ALOGE("slCreateEngine() failed: %s", getSLErrStr(result)); |
| return NULL; |
| } |
| // realize the engine |
| result = (*engine)->Realize(engine, SL_BOOLEAN_FALSE /* async */); |
| if (result != SL_RESULT_SUCCESS) { |
| ALOGE("Realize() failed: %s", getSLErrStr(result)); |
| (*engine)->Destroy(engine); |
| return NULL; |
| } |
| return engine; |
| } |
| |
| SLObjectItf OpenSLEngine(bool global) { |
| |
| if (!global) { |
| return createEngine(); |
| } |
| Mutex::Autolock l(gLock); |
| if (gRefCount == 0) { |
| gEngineObject = createEngine(); |
| } |
| gRefCount++; |
| return gEngineObject; |
| } |
| |
| void CloseSLEngine(SLObjectItf engine) { |
| Mutex::Autolock l(gLock); |
| if (engine == gEngineObject) { |
| if (gRefCount == 0) { |
| ALOGE("CloseSLEngine(%p): refcount already 0", engine); |
| return; |
| } |
| if (--gRefCount != 0) { |
| return; |
| } |
| gEngineObject = NULL; |
| } |
| (*engine)->Destroy(engine); |
| } |
| |
| } // namespace android |
| |