OpenSL-based audio support for BootAnimation

Respects dnd settings for sound playback.
Basic implementation uses in-memory wavs as buffers.
audioplay::playClip should not be called before previous clip ends.
Updated FORMAT.md to reflect no more audio_conf.txt

Bug: 29055299
Change-Id: Ifc358d7c85f11b8b54ae6446c40643b87bc567f2

8 files changed, 393 insertions, 416 deletions

diff --git a/cmds/bootanimation/Android.mk b/cmds/bootanimation/Android.mk
index 7c8842ca0231..3cf13d908632 100644
--- a/cmds/bootanimation/Android.mk
+++ b/cmds/bootanimation/Android.mk
@@ -3,14 +3,16 @@ include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
     bootanimation_main.cpp \
-    AudioPlayer.cpp \
+    audioplay.cpp \
     BootAnimation.cpp
 
 LOCAL_CFLAGS += -DGL_GLEXT_PROTOTYPES -DEGL_EGLEXT_PROTOTYPES
 
 LOCAL_CFLAGS += -Wall -Werror -Wunused -Wunreachable-code
 
-LOCAL_C_INCLUDES += external/tinyalsa/include
+LOCAL_C_INCLUDES += \
+    external/tinyalsa/include \
+    frameworks/wilhelm/include
 
 LOCAL_SHARED_LIBRARIES := \
     libcutils \
@@ -23,6 +25,7 @@ LOCAL_SHARED_LIBRARIES := \
     libEGL \
     libGLESv1_CM \
     libgui \
+    libOpenSLES \
     libtinyalsa
 
 LOCAL_MODULE:= bootanimation
@@ -33,4 +36,8 @@ ifdef TARGET_32_BIT_SURFACEFLINGER
 LOCAL_32_BIT_ONLY := true
 endif
 
+# get asserts to work
+APP_OPTIM := debug
+LOCAL_CFLAGS += -UNDEBUG
+
 include $(BUILD_EXECUTABLE)
diff --git a/cmds/bootanimation/AudioPlayer.cpp b/cmds/bootanimation/AudioPlayer.cpp
deleted file mode 100644
index 293213008d58..000000000000
--- a/cmds/bootanimation/AudioPlayer.cpp
+++ /dev/null
@@ -1,313 +0,0 @@
-/*
- * Copyright (C) 2014 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 "BootAnim_AudioPlayer"
-
-#include "AudioPlayer.h"
-
-#include <androidfw/ZipFileRO.h>
-#include <tinyalsa/asoundlib.h>
-#include <utils/Log.h>
-#include <utils/String8.h>
-
-#define ID_RIFF 0x46464952
-#define ID_WAVE 0x45564157
-#define ID_FMT  0x20746d66
-#define ID_DATA 0x61746164
-
-// Maximum line length for audio_conf.txt
-// We only accept lines less than this length to avoid overflows using sscanf()
-#define MAX_LINE_LENGTH 1024
-
-struct riff_wave_header {
-    uint32_t riff_id;
-    uint32_t riff_sz;
-    uint32_t wave_id;
-};
-
-struct chunk_header {
-    uint32_t id;
-    uint32_t sz;
-};
-
-struct chunk_fmt {
-    uint16_t audio_format;
-    uint16_t num_channels;
-    uint32_t sample_rate;
-    uint32_t byte_rate;
-    uint16_t block_align;
-    uint16_t bits_per_sample;
-};
-
-
-namespace android {
-
-AudioPlayer::AudioPlayer()
-    :   mCard(-1),
-        mDevice(-1),
-        mPeriodSize(0),
-        mPeriodCount(0),
-        mCurrentFile(NULL)
-{
-}
-
-AudioPlayer::~AudioPlayer() {
-}
-
-static bool setMixerValue(struct mixer* mixer, const char* name, const char* values)
-{
-    if (!mixer) {
-        ALOGE("no mixer in setMixerValue");
-        return false;
-    }
-    struct mixer_ctl *ctl = mixer_get_ctl_by_name(mixer, name);
-    if (!ctl) {
-        ALOGE("mixer_get_ctl_by_name failed for %s", name);
-        return false;
-    }
-
-    enum mixer_ctl_type type = mixer_ctl_get_type(ctl);
-    int numValues = mixer_ctl_get_num_values(ctl);
-    int intValue;
-    char stringValue[MAX_LINE_LENGTH];
-
-    for (int i = 0; i < numValues && values; i++) {
-        // strip leading space
-        while (*values == ' ') values++;
-        if (*values == 0) break;
-
-        switch (type) {
-            case MIXER_CTL_TYPE_BOOL:
-            case MIXER_CTL_TYPE_INT:
-                if (sscanf(values, "%d", &intValue) == 1) {
-                    if (mixer_ctl_set_value(ctl, i, intValue) != 0) {
-                        ALOGE("mixer_ctl_set_value failed for %s %d", name, intValue);
-                    }
-                } else {
-                    ALOGE("Could not parse %s as int for %s", values, name);
-                }
-                break;
-            case MIXER_CTL_TYPE_ENUM:
-                if (sscanf(values, "%s", stringValue) == 1) {
-                    if (mixer_ctl_set_enum_by_string(ctl, stringValue) != 0) {
-                        ALOGE("mixer_ctl_set_enum_by_string failed for %s %s", name, stringValue);
-                    }
-                } else {
-                    ALOGE("Could not parse %s as enum for %s", values, name);
-                }
-                break;
-            default:
-                ALOGE("unsupported mixer type %d for %s", type, name);
-                break;
-        }
-
-        values = strchr(values, ' ');
-    }
-
-    return true;
-}
-
-
-/*
- * Parse the audio configuration file.
- * The file is named audio_conf.txt and must begin with the following header:
- *
- * card=<ALSA card number>
- * device=<ALSA device number>
- * period_size=<period size>
- * period_count=<period count>
- *
- * This header is followed by zero or more mixer settings, each with the format:
- * mixer "<name>" = <value list>
- * Since mixer names can contain spaces, the name must be enclosed in double quotes.
- * The values in the value list can be integers, booleans (represented by 0 or 1)
- * or strings for enum values.
- */
-bool AudioPlayer::init(const char* config)
-{
-    int tempInt;
-    struct mixer* mixer = NULL;
-    char    name[MAX_LINE_LENGTH];
-
-    for (;;) {
-        const char* endl = strstr(config, "\n");
-        if (!endl) break;
-        String8 line(config, endl - config);
-        if (line.length() >= MAX_LINE_LENGTH) {
-            ALOGE("Line too long in audio_conf.txt");
-            return false;
-        }
-        const char* l = line.string();
-
-        if (sscanf(l, "card=%d", &tempInt) == 1) {
-            ALOGD("card=%d", tempInt);
-            mCard = tempInt;
-
-            mixer = mixer_open(mCard);
-            if (!mixer) {
-                ALOGE("could not open mixer for card %d", mCard);
-                return false;
-            }
-        } else if (sscanf(l, "device=%d", &tempInt) == 1) {
-            ALOGD("device=%d", tempInt);
-            mDevice = tempInt;
-        } else if (sscanf(l, "period_size=%d", &tempInt) == 1) {
-            ALOGD("period_size=%d", tempInt);
-            mPeriodSize = tempInt;
-        } else if (sscanf(l, "period_count=%d", &tempInt) == 1) {
-            ALOGD("period_count=%d", tempInt);
-            mPeriodCount = tempInt;
-        } else if (sscanf(l, "mixer \"%[0-9a-zA-Z _]s\"", name) == 1) {
-            const char* values = strchr(l, '=');
-            if (values) {
-                values++;   // skip '='
-                ALOGD("name: \"%s\" = %s", name, values);
-                setMixerValue(mixer, name, values);
-            } else {
-                ALOGE("values missing for name: \"%s\"", name);
-            }
-        }
-        config = ++endl;
-    }
-
-    mixer_close(mixer);
-
-    if (mCard >= 0 && mDevice >= 0) {
-        return true;
-    }
-
-    return false;
-}
-
-void AudioPlayer::playFile(FileMap* fileMap) {
-    // stop any currently playing sound
-    requestExitAndWait();
-
-    mCurrentFile = fileMap;
-    run("bootanim audio", PRIORITY_URGENT_AUDIO);
-}
-
-bool AudioPlayer::threadLoop()
-{
-    struct pcm_config config;
-    struct pcm *pcm = NULL;
-    bool moreChunks = true;
-    const struct chunk_fmt* chunkFmt = NULL;
-    int bufferSize;
-    const uint8_t* wavData;
-    size_t wavLength;
-    const struct riff_wave_header* wavHeader;
-
-    if (mCurrentFile == NULL) {
-        ALOGE("mCurrentFile is NULL");
-        return false;
-     }
-
-    wavData = (const uint8_t *)mCurrentFile->getDataPtr();
-    if (!wavData) {
-        ALOGE("Could not access WAV file data");
-        goto exit;
-    }
-    wavLength = mCurrentFile->getDataLength();
-
-    wavHeader = (const struct riff_wave_header *)wavData;
-    if (wavLength < sizeof(*wavHeader) || (wavHeader->riff_id != ID_RIFF) ||
-        (wavHeader->wave_id != ID_WAVE)) {
-        ALOGE("Error: audio file is not a riff/wave file\n");
-        goto exit;
-    }
-    wavData += sizeof(*wavHeader);
-    wavLength -= sizeof(*wavHeader);
-
-    do {
-        const struct chunk_header* chunkHeader = (const struct chunk_header*)wavData;
-        if (wavLength < sizeof(*chunkHeader)) {
-            ALOGE("EOF reading chunk headers");
-            goto exit;
-        }
-
-        wavData += sizeof(*chunkHeader);
-        wavLength -=  sizeof(*chunkHeader);
-
-        switch (chunkHeader->id) {
-            case ID_FMT:
-                chunkFmt = (const struct chunk_fmt *)wavData;
-                wavData += chunkHeader->sz;
-                wavLength -= chunkHeader->sz;
-                break;
-            case ID_DATA:
-                /* Stop looking for chunks */
-                moreChunks = 0;
-                break;
-            default:
-                /* Unknown chunk, skip bytes */
-                wavData += chunkHeader->sz;
-                wavLength -= chunkHeader->sz;
-        }
-    } while (moreChunks);
-
-    if (!chunkFmt) {
-        ALOGE("format not found in WAV file");
-        goto exit;
-    }
-
-
-    memset(&config, 0, sizeof(config));
-    config.channels = chunkFmt->num_channels;
-    config.rate = chunkFmt->sample_rate;
-    config.period_size = mPeriodSize;
-    config.period_count = mPeriodCount;
-    config.start_threshold = mPeriodSize / 4;
-    config.stop_threshold = INT_MAX;
-    config.avail_min = config.start_threshold;
-    if (chunkFmt->bits_per_sample != 16) {
-        ALOGE("only 16 bit WAV files are supported");
-        goto exit;
-    }
-    config.format = PCM_FORMAT_S16_LE;
-
-    pcm = pcm_open(mCard, mDevice, PCM_OUT, &config);
-    if (!pcm || !pcm_is_ready(pcm)) {
-        ALOGE("Unable to open PCM device (%s)\n", pcm_get_error(pcm));
-        goto exit;
-    }
-
-    bufferSize = pcm_frames_to_bytes(pcm, pcm_get_buffer_size(pcm));
-
-    while (wavLength > 0) {
-        if (exitPending()) goto exit;
-        size_t count = bufferSize;
-        if (count > wavLength)
-            count = wavLength;
-
-        if (pcm_write(pcm, wavData, count)) {
-            ALOGE("pcm_write failed (%s)", pcm_get_error(pcm));
-            goto exit;
-        }
-        wavData += count;
-        wavLength -= count;
-    }
-
-exit:
-    if (pcm)
-        pcm_close(pcm);
-    delete mCurrentFile;
-    mCurrentFile = NULL;
-    return false;
-}
-
-} // namespace android
diff --git a/cmds/bootanimation/AudioPlayer.h b/cmds/bootanimation/AudioPlayer.h
deleted file mode 100644
index 1def0aeac8d1..000000000000
--- a/cmds/bootanimation/AudioPlayer.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2014 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.
- */
-
-#ifndef _BOOTANIMATION_AUDIOPLAYER_H
-#define _BOOTANIMATION_AUDIOPLAYER_H
-
-#include <utils/Thread.h>
-#include <utils/FileMap.h>
-
-namespace android {
-
-class AudioPlayer : public Thread
-{
-public:
-                AudioPlayer();
-    virtual     ~AudioPlayer();
-    bool        init(const char* config);
-
-    void        playFile(FileMap* fileMap);
-
-private:
-    virtual bool        threadLoop();
-
-private:
-    int                 mCard;      // ALSA card to use
-    int                 mDevice;    // ALSA device to use
-    int                 mPeriodSize;
-    int                 mPeriodCount;
-
-    FileMap*            mCurrentFile;
-};
-
-} // namespace android
-
-#endif // _BOOTANIMATION_AUDIOPLAYER_H
diff --git a/cmds/bootanimation/BootAnimation.cpp b/cmds/bootanimation/BootAnimation.cpp
index e849f4b8e9d3..6789e2f7ea2b 100644
--- a/cmds/bootanimation/BootAnimation.cpp
+++ b/cmds/bootanimation/BootAnimation.cpp
@@ -58,7 +58,7 @@
 #include <EGL/eglext.h>
 
 #include "BootAnimation.h"
-#include "AudioPlayer.h"
+#include "audioplay.h"
 
 namespace android {
 
@@ -106,9 +106,7 @@ void BootAnimation::binderDied(const wp<IBinder>&)
     // might be blocked on a condition variable that will never be updated.
     kill( getpid(), SIGKILL );
     requestExit();
-    if (mAudioPlayer != NULL) {
-        mAudioPlayer->requestExit();
-    }
+    audioplay::destroy();
 }
 
 status_t BootAnimation::initTexture(Texture* texture, AssetManager& assets,
@@ -400,9 +398,6 @@ void BootAnimation::checkExit() {
     int exitnow = atoi(value);
     if (exitnow) {
         requestExit();
-        if (mAudioPlayer != NULL) {
-            mAudioPlayer->requestExit();
-        }
     }
 }
 
@@ -524,16 +519,6 @@ bool BootAnimation::parseAnimationDesc(Animation& animation)
     }
     char const* s = desString.string();
 
-    // Create and initialize an AudioPlayer if we have an audio_conf.txt file
-    String8 audioConf;
-    if (readFile(animation.zip, "audio_conf.txt", audioConf)) {
-        mAudioPlayer = new AudioPlayer;
-        if (!mAudioPlayer->init(audioConf.string())) {
-            ALOGE("mAudioPlayer.init failed");
-            mAudioPlayer = NULL;
-        }
-    }
-
     // Parse the description file
     for (;;) {
         const char* endl = strstr(s, "\n");
@@ -564,7 +549,7 @@ bool BootAnimation::parseAnimationDesc(Animation& animation)
             part.pause = pause;
             part.path = path;
             part.clockPosY = clockPosY;
-            part.audioFile = NULL;
+            part.audioData = NULL;
             part.animation = NULL;
             if (!parseColor(color, part.backgroundColor)) {
                 ALOGE("> invalid color '#%s'", color);
@@ -580,7 +565,7 @@ bool BootAnimation::parseAnimationDesc(Animation& animation)
             part.playUntilComplete = false;
             part.count = 1;
             part.pause = 0;
-            part.audioFile = NULL;
+            part.audioData = NULL;
             part.animation = loadAnimation(String8(SYSTEM_BOOTANIMATION_FILE));
             if (part.animation != NULL)
                 animation.parts.add(part);
@@ -601,6 +586,7 @@ bool BootAnimation::preloadZip(Animation& animation)
         return false;
     }
 
+    bool hasAudio = false;
     ZipEntryRO entry;
     char name[ANIM_ENTRY_NAME_MAX];
     while ((entry = zip->nextEntry(cookie)) != NULL) {
@@ -624,8 +610,10 @@ bool BootAnimation::preloadZip(Animation& animation)
                             if (map) {
                                 Animation::Part& part(animation.parts.editItemAt(j));
                                 if (leaf == "audio.wav") {
+                                    hasAudio = true;
                                     // a part may have at most one audio file
-                                    part.audioFile = map;
+                                    part.audioData = (uint8_t *)map->getDataPtr();
+                                    part.audioLength = map->getDataLength();
                                 } else if (leaf == "trim.txt") {
                                     part.trimData.setTo((char const*)map->getDataPtr(),
                                                         map->getDataLength());
@@ -640,6 +628,8 @@ bool BootAnimation::preloadZip(Animation& animation)
                                     part.frames.add(frame);
                                 }
                             }
+                        } else {
+                            ALOGE("bootanimation.zip is compressed; must be only stored");
                         }
                     }
                 }
@@ -673,6 +663,12 @@ bool BootAnimation::preloadZip(Animation& animation)
         }
     }
 
+    // Create and initialize audioplay if there is a wav file in any of the animations.
+    if (hasAudio) {
+        ALOGD("found audio.wav, creating playback engine");
+        audioplay::create();
+    }
+
     zip->endIteration(cookie);
 
     return true;
@@ -763,8 +759,9 @@ bool BootAnimation::playAnimation(const Animation& animation)
                 break;
 
             // only play audio file the first time we animate the part
-            if (r == 0 && mAudioPlayer != NULL && part.audioFile) {
-                mAudioPlayer->playFile(part.audioFile);
+            if (r == 0 && part.audioData) {
+                ALOGD("playing clip for part%d, size=%d", (int) i, part.audioLength);
+                audioplay::playClip(part.audioData, part.audioLength);
             }
 
             glClearColor(
@@ -847,6 +844,11 @@ bool BootAnimation::playAnimation(const Animation& animation)
             }
         }
     }
+
+    // we've finally played everything we're going to play
+    audioplay::setPlaying(false);
+    audioplay::destroy();
+
     return true;
 }
 
diff --git a/cmds/bootanimation/BootAnimation.h b/cmds/bootanimation/BootAnimation.h
index a093c9b87e75..5feea0187926 100644
--- a/cmds/bootanimation/BootAnimation.h
+++ b/cmds/bootanimation/BootAnimation.h
@@ -30,7 +30,6 @@ class SkBitmap;
 
 namespace android {
 
-class AudioPlayer;
 class Surface;
 class SurfaceComposerClient;
 class SurfaceControl;
@@ -98,7 +97,8 @@ private:
             SortedVector<Frame> frames;
             bool playUntilComplete;
             float backgroundColor[3];
-            FileMap* audioFile;
+            uint8_t* audioData;
+            int audioLength;
             Animation* animation;
         };
         int fps;
@@ -124,7 +124,6 @@ private:
     void checkExit();
 
     sp<SurfaceComposerClient>       mSession;
-    sp<AudioPlayer>                 mAudioPlayer;
     AssetManager mAssets;
     Texture     mAndroid[2];
     Texture     mClock;
diff --git a/cmds/bootanimation/FORMAT.md b/cmds/bootanimation/FORMAT.md
index e4c52f783fa3..9ea6fea966f2 100644
--- a/cmds/bootanimation/FORMAT.md
+++ b/cmds/bootanimation/FORMAT.md
@@ -67,34 +67,8 @@ If the file is not present, each frame is assumed to be the same size as the ani
 
 ## audio.wav
 
-Each part may optionally play a `wav` sample when it starts. To enable this for an animation,
-you must also include a `audio_conf.txt` file in the ZIP archive. Its format is as follows:
-
-    card=<ALSA card number>
-    device=<ALSA device number>
-    period_size=<period size>
-    period_count=<period count>
-
-This header is followed by zero or more mixer settings, each with the format:
-
-    mixer "<name>" = <value list>
-
-Here's an example `audio_conf.txt` from Shamu:
-
-    card=0
-    device=15
-    period_size=1024
-    period_count=4
-
-    mixer "QUAT_MI2S_RX Audio Mixer MultiMedia5" = 1
-    mixer "Playback Channel Map" = 0 220 157 195 0 0 0 0
-    mixer "QUAT_MI2S_RX Channels" = Two
-    mixer "BOOST_STUB Right Mixer right" = 1
-    mixer "BOOST_STUB Left Mixer left" = 1
-    mixer "Compress Playback 9 Volume" = 80 80
-
-You will probably need to get these mixer names and values out of `audio_platform_info.xml`
-and `mixer_paths.xml` for your device.
+Each part may optionally play a `wav` sample when it starts. To enable this, add a file
+with the name `audio.wav` in the part directory.
 
 ## exiting
 
diff --git a/cmds/bootanimation/audioplay.cpp b/cmds/bootanimation/audioplay.cpp
new file mode 100644
index 000000000000..e20ef0c7c6cc
--- /dev/null
+++ b/cmds/bootanimation/audioplay.cpp
@@ -0,0 +1,321 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+
+// cribbed from samples/native-audio
+
+#include "audioplay.h"
+
+#define CHATTY ALOGD
+
+#include <assert.h>
+#include <string.h>
+
+#include <utils/Log.h>
+
+// for native audio
+#include <SLES/OpenSLES.h>
+#include <SLES/OpenSLES_Android.h>
+
+namespace audioplay {
+namespace {
+
+// engine interfaces
+static SLObjectItf engineObject = NULL;
+static SLEngineItf engineEngine;
+
+// output mix interfaces
+static SLObjectItf outputMixObject = NULL;
+
+// buffer queue player interfaces
+static SLObjectItf bqPlayerObject = NULL;
+static SLPlayItf bqPlayerPlay;
+static SLAndroidSimpleBufferQueueItf bqPlayerBufferQueue;
+static SLMuteSoloItf bqPlayerMuteSolo;
+static SLVolumeItf bqPlayerVolume;
+
+// pointer and size of the next player buffer to enqueue, and number of remaining buffers
+static const uint8_t* nextBuffer;
+static unsigned nextSize;
+
+static const uint32_t ID_RIFF = 0x46464952;
+static const uint32_t ID_WAVE = 0x45564157;
+static const uint32_t ID_FMT  = 0x20746d66;
+static const uint32_t ID_DATA = 0x61746164;
+
+struct RiffWaveHeader {
+    uint32_t riff_id;
+    uint32_t riff_sz;
+    uint32_t wave_id;
+};
+
+struct ChunkHeader {
+    uint32_t id;
+    uint32_t sz;
+};
+
+struct ChunkFormat {
+    uint16_t audio_format;
+    uint16_t num_channels;
+    uint32_t sample_rate;
+    uint32_t byte_rate;
+    uint16_t block_align;
+    uint16_t bits_per_sample;
+};
+
+// this callback handler is called every time a buffer finishes playing
+void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void *context) {
+    (void)bq;
+    (void)context;
+    assert(bq == bqPlayerBufferQueue);
+    assert(NULL == context);
+    audioplay::setPlaying(false);
+}
+
+bool hasPlayer() {
+    return (engineObject != NULL && bqPlayerObject != NULL);
+}
+
+// create the engine and output mix objects
+void createEngine() {
+    SLresult result;
+
+    // create engine
+    result = slCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // realize the engine
+    result = (*engineObject)->Realize(engineObject, SL_BOOLEAN_FALSE);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // get the engine interface, which is needed in order to create other objects
+    result = (*engineObject)->GetInterface(engineObject, SL_IID_ENGINE, &engineEngine);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // create output mix, with environmental reverb specified as a non-required interface
+    const SLInterfaceID ids[1] = {SL_IID_ENVIRONMENTALREVERB};
+    const SLboolean req[1] = {SL_BOOLEAN_FALSE};
+    result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 1, ids, req);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // realize the output mix
+    result = (*outputMixObject)->Realize(outputMixObject, SL_BOOLEAN_FALSE);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+}
+
+// create buffer queue audio player
+void createBufferQueueAudioPlayer(const ChunkFormat* chunkFormat) {
+    SLresult result;
+
+    // configure audio source
+    SLDataLocator_AndroidSimpleBufferQueue loc_bufq = {SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 1};
+
+    SLDataFormat_PCM format_pcm = {
+        SL_DATAFORMAT_PCM,
+        chunkFormat->num_channels,
+        chunkFormat->sample_rate * 1000,  // convert to milliHz
+        chunkFormat->bits_per_sample,
+        16,
+        SL_SPEAKER_FRONT_CENTER,
+        SL_BYTEORDER_LITTLEENDIAN
+    };
+    SLDataSource audioSrc = {&loc_bufq, &format_pcm};
+
+    // configure audio sink
+    SLDataLocator_OutputMix loc_outmix = {SL_DATALOCATOR_OUTPUTMIX, outputMixObject};
+    SLDataSink audioSnk = {&loc_outmix, NULL};
+
+    // create audio player
+    const SLInterfaceID ids[2] = {SL_IID_BUFFERQUEUE, SL_IID_VOLUME};
+    const SLboolean req[2] = {SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE};
+    result = (*engineEngine)->CreateAudioPlayer(engineEngine, &bqPlayerObject, &audioSrc, &audioSnk,
+            2, ids, req);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // realize the player
+    result = (*bqPlayerObject)->Realize(bqPlayerObject, SL_BOOLEAN_FALSE);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // get the play interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_PLAY, &bqPlayerPlay);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // get the buffer queue interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_BUFFERQUEUE,
+            &bqPlayerBufferQueue);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // register callback on the buffer queue
+    result = (*bqPlayerBufferQueue)->RegisterCallback(bqPlayerBufferQueue, bqPlayerCallback, NULL);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+#if 0   // mute/solo is not supported for sources that are known to be mono, as this is
+    // get the mute/solo interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_MUTESOLO, &bqPlayerMuteSolo);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+#endif
+
+    // get the volume interface
+    result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_VOLUME, &bqPlayerVolume);
+    assert(SL_RESULT_SUCCESS == result);
+    (void)result;
+
+    // set the player's state to playing
+    audioplay::setPlaying(true);
+    CHATTY("Created buffer queue player: %p", bqPlayerBufferQueue);
+}
+
+} // namespace
+
+void create() {
+    createEngine();
+}
+
+bool playClip(const uint8_t* buf, int size) {
+    // Parse the WAV header
+    nextBuffer = buf;
+    nextSize = size;
+    const RiffWaveHeader* wavHeader = (const RiffWaveHeader*)buf;
+    if (nextSize < sizeof(*wavHeader) || (wavHeader->riff_id != ID_RIFF) ||
+        (wavHeader->wave_id != ID_WAVE)) {
+        ALOGE("Error: audio file is not a riff/wave file\n");
+        return false;
+    }
+    nextBuffer += sizeof(*wavHeader);
+    nextSize -= sizeof(*wavHeader);
+
+    const ChunkFormat* chunkFormat = nullptr;
+    while (true) {
+        const ChunkHeader* chunkHeader = (const ChunkHeader*)nextBuffer;
+        if (nextSize < sizeof(*chunkHeader)) {
+            ALOGE("EOF reading chunk headers");
+            return false;
+        }
+
+        nextBuffer += sizeof(*chunkHeader);
+        nextSize -= sizeof(*chunkHeader);
+
+        bool endLoop = false;
+        switch (chunkHeader->id) {
+            case ID_FMT:
+                chunkFormat = (const ChunkFormat*)nextBuffer;
+                nextBuffer += chunkHeader->sz;
+                nextSize -= chunkHeader->sz;
+                break;
+            case ID_DATA:
+                /* Stop looking for chunks */
+                endLoop = true;
+                break;
+            default:
+                /* Unknown chunk, skip bytes */
+                nextBuffer += chunkHeader->sz;
+                nextSize -= chunkHeader->sz;
+        }
+        if (endLoop) {
+            break;
+        }
+    }
+
+    if (!chunkFormat) {
+        ALOGE("format not found in WAV file");
+        return false;
+    }
+
+    // If this is the first clip, create the buffer based on this WAV's header.
+    // We assume all future clips with be in the same format.
+    if (bqPlayerBufferQueue == nullptr) {
+        createBufferQueueAudioPlayer(chunkFormat);
+    }
+
+    assert(bqPlayerBufferQueue != nullptr);
+    assert(buf != nullptr);
+
+    if (!hasPlayer()) {
+        ALOGD("cannot play clip %p without a player", buf);
+        return false;
+    }
+
+    CHATTY("playClip on player %p: buf=%p size=%d", bqPlayerBufferQueue, buf, size);
+
+    if (nextSize > 0) {
+        // here we only enqueue one buffer because it is a long clip,
+        // but for streaming playback we would typically enqueue at least 2 buffers to start
+        SLresult result;
+        result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, nextBuffer, nextSize);
+        if (SL_RESULT_SUCCESS != result) {
+            return false;
+        }
+        audioplay::setPlaying(true);
+    }
+
+    return true;
+}
+
+// set the playing state for the buffer queue audio player
+void setPlaying(bool isPlaying) {
+    if (!hasPlayer()) return;
+
+    SLresult result;
+
+    if (NULL != bqPlayerPlay) {
+        // set the player's state
+        result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay,
+            isPlaying ? SL_PLAYSTATE_PLAYING : SL_PLAYSTATE_STOPPED);
+        assert(SL_RESULT_SUCCESS == result);
+        (void)result;
+    }
+
+}
+
+void destroy() {
+    // destroy buffer queue audio player object, and invalidate all associated interfaces
+    if (bqPlayerObject != NULL) {
+        CHATTY("destroying audio player");
+        (*bqPlayerObject)->Destroy(bqPlayerObject);
+        bqPlayerObject = NULL;
+        bqPlayerPlay = NULL;
+        bqPlayerBufferQueue = NULL;
+        bqPlayerMuteSolo = NULL;
+        bqPlayerVolume = NULL;
+    }
+
+    // destroy output mix object, and invalidate all associated interfaces
+    if (outputMixObject != NULL) {
+        (*outputMixObject)->Destroy(outputMixObject);
+        outputMixObject = NULL;
+    }
+
+    // destroy engine object, and invalidate all associated interfaces
+    if (engineObject != NULL) {
+        CHATTY("destroying audio engine");
+        (*engineObject)->Destroy(engineObject);
+        engineObject = NULL;
+        engineEngine = NULL;
+    }
+}
+
+}  // namespace audioplay
diff --git a/cmds/bootanimation/audioplay.h b/cmds/bootanimation/audioplay.h
new file mode 100644
index 000000000000..bdc0a1c84b6e
--- /dev/null
+++ b/cmds/bootanimation/audioplay.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+
+#ifndef AUDIOPLAY_H_
+#define AUDIOPLAY_H_
+
+#include <string.h>
+
+namespace audioplay {
+
+void create();
+
+// Play a WAV pointed to by buf.  All clips are assumed to be in the same format.
+// playClip should not be called while a clip is still playing.
+bool playClip(const uint8_t* buf, int size);
+void setPlaying(bool isPlaying);
+void destroy();
+
+}
+
+#endif // AUDIOPLAY_H_