Use symbol AUDIO_IO_HANDLE_NONE from <system/audio.h>

Change-Id: Id6b1aa17558eb73e17f22b8eab6cd02e00a96dff

6 files changed, 30 insertions, 29 deletions

diff --git a/include/media/AudioEffect.h b/include/media/AudioEffect.h
index 01dcbb2..f98002d 100644
--- a/include/media/AudioEffect.h
+++ b/include/media/AudioEffect.h
@@ -231,7 +231,7 @@ public:
                   effect_callback_t cbf = NULL,
                   void* user = NULL,
                   int sessionId = AUDIO_SESSION_OUTPUT_MIX,
-                  audio_io_handle_t io = 0
+                  audio_io_handle_t io = AUDIO_IO_HANDLE_NONE
                   );
 
     /* Constructor.
@@ -243,7 +243,7 @@ public:
                     effect_callback_t cbf = NULL,
                     void* user = NULL,
                     int sessionId = AUDIO_SESSION_OUTPUT_MIX,
-                    audio_io_handle_t io = 0
+                    audio_io_handle_t io = AUDIO_IO_HANDLE_NONE
                     );
 
     /* Terminates the AudioEffect and unregisters it from AudioFlinger.
@@ -265,7 +265,7 @@ public:
                             effect_callback_t cbf = NULL,
                             void* user = NULL,
                             int sessionId = AUDIO_SESSION_OUTPUT_MIX,
-                            audio_io_handle_t io = 0
+                            audio_io_handle_t io = AUDIO_IO_HANDLE_NONE
                             );
 
     /* Result of constructing the AudioEffect. This must be checked
diff --git a/include/media/AudioTrack.h b/include/media/AudioTrack.h
index d3168ba..3dadf52 100644
--- a/include/media/AudioTrack.h
+++ b/include/media/AudioTrack.h
@@ -450,7 +450,8 @@ public:
      *  none.
      *
      * Returned value:
-     *  handle on audio hardware output
+     *  handle on audio hardware output, or AUDIO_IO_HANDLE_NONE if the
+     *  track needed to be re-created but that failed
      */
             audio_io_handle_t    getOutput() const;
 
diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index 961b0a2..a7bf380 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -471,7 +471,7 @@ status_t AudioRecord::openRecord_l(size_t epoch)
 
     audio_io_handle_t input = AudioSystem::getInput(mInputSource, mSampleRate, mFormat,
             mChannelMask, mSessionId);
-    if (input == 0) {
+    if (input == AUDIO_IO_HANDLE_NONE) {
         ALOGE("Could not get audio input for record source %d, sample rate %u, format %#x, "
               "channel mask %#x, session %d",
               mInputSource, mSampleRate, mFormat, mChannelMask, mSessionId);
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index 8542404..301c7d6 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -196,12 +196,12 @@ String8 AudioSystem::getParameters(audio_io_handle_t ioHandle, const String8& ke
 
 status_t AudioSystem::setParameters(const String8& keyValuePairs)
 {
-    return setParameters((audio_io_handle_t) 0, keyValuePairs);
+    return setParameters(AUDIO_IO_HANDLE_NONE, keyValuePairs);
 }
 
 String8 AudioSystem::getParameters(const String8& keys)
 {
-    return getParameters((audio_io_handle_t) 0, keys);
+    return getParameters(AUDIO_IO_HANDLE_NONE, keys);
 }
 
 // convert volume steps to natural log scale
@@ -284,7 +284,7 @@ status_t AudioSystem::getOutputFrameCount(size_t* frameCount, audio_stream_type_
     }
 
     output = getOutput(streamType);
-    if (output == 0) {
+    if (output == AUDIO_IO_HANDLE_NONE) {
         return PERMISSION_DENIED;
     }
 
@@ -329,7 +329,7 @@ status_t AudioSystem::getOutputLatency(uint32_t* latency, audio_stream_type_t st
     }
 
     output = getOutput(streamType);
-    if (output == 0) {
+    if (output == AUDIO_IO_HANDLE_NONE) {
         return PERMISSION_DENIED;
     }
 
@@ -413,7 +413,7 @@ uint32_t AudioSystem::getInputFramesLost(audio_io_handle_t ioHandle)
     const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
     uint32_t result = 0;
     if (af == 0) return result;
-    if (ioHandle == 0) return result;
+    if (ioHandle == AUDIO_IO_HANDLE_NONE) return result;
 
     result = af->getInputFramesLost(ioHandle);
     return result;
@@ -464,7 +464,7 @@ void AudioSystem::AudioFlingerClient::ioConfigChanged(int event, audio_io_handle
     const OutputDescriptor *desc;
     audio_stream_type_t stream;
 
-    if (ioHandle == 0) return;
+    if (ioHandle == AUDIO_IO_HANDLE_NONE) return;
 
     Mutex::Autolock _l(AudioSystem::gLock);
 
@@ -738,7 +738,7 @@ audio_io_handle_t AudioSystem::getOutputForEffect(const effect_descriptor_t *des
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     // FIXME change return type to status_t, and return PERMISSION_DENIED here
-    if (aps == 0) return 0;
+    if (aps == 0) return AUDIO_IO_HANDLE_NONE;
     return aps->getOutputForEffect(desc);
 }
 
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 22760d9..fbfd3da 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -546,7 +546,7 @@ void AudioTrack::pause()
     mAudioTrack->pause();
 
     if (isOffloaded_l()) {
-        if (mOutput != 0) {
+        if (mOutput != AUDIO_IO_HANDLE_NONE) {
             uint32_t halFrames;
             // OffloadThread sends HAL pause in its threadLoop.. time saved
             // here can be slightly off
@@ -633,7 +633,7 @@ uint32_t AudioTrack::getSampleRate() const
     // query the HAL and update if needed.
 // FIXME use Proxy return channel to update the rate from server and avoid polling here
     if (isOffloaded_l()) {
-        if (mOutput != 0) {
+        if (mOutput != AUDIO_IO_HANDLE_NONE) {
             uint32_t sampleRate = 0;
             status_t status = AudioSystem::getSamplingRate(mOutput, mStreamType, &sampleRate);
             if (status == NO_ERROR) {
@@ -779,7 +779,7 @@ status_t AudioTrack::getPosition(uint32_t *position) const
             return NO_ERROR;
         }
 
-        if (mOutput != 0) {
+        if (mOutput != AUDIO_IO_HANDLE_NONE) {
             uint32_t halFrames;
             AudioSystem::getRenderPosition(mOutput, &halFrames, &dspFrames);
         }
@@ -855,7 +855,7 @@ status_t AudioTrack::createTrack_l(size_t epoch)
 
     audio_io_handle_t output = AudioSystem::getOutput(mStreamType, mSampleRate, mFormat,
             mChannelMask, mFlags, mOffloadInfo);
-    if (output == 0) {
+    if (output == AUDIO_IO_HANDLE_NONE) {
         ALOGE("Could not get audio output for stream type %d, sample rate %u, format %#x, "
               "channel mask %#x, flags %#x",
               mStreamType, mSampleRate, mFormat, mChannelMask, mFlags);
@@ -1798,7 +1798,7 @@ status_t AudioTrack::getTimestamp(AudioTimestamp& timestamp)
 String8 AudioTrack::getParameters(const String8& keys)
 {
     audio_io_handle_t output = getOutput();
-    if (output != 0) {
+    if (output != AUDIO_IO_HANDLE_NONE) {
         return AudioSystem::getParameters(output, keys);
     } else {
         return String8::empty();
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 853ff07..123202a 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -877,7 +877,7 @@ status_t AudioFlinger::setStreamVolume(audio_stream_type_t stream, float value,
 
     AutoMutex lock(mLock);
     PlaybackThread *thread = NULL;
-    if (output) {
+    if (output != AUDIO_IO_HANDLE_NONE) {
         thread = checkPlaybackThread_l(output);
         if (thread == NULL) {
             return BAD_VALUE;
@@ -926,7 +926,7 @@ float AudioFlinger::streamVolume(audio_stream_type_t stream, audio_io_handle_t o
 
     AutoMutex lock(mLock);
     float volume;
-    if (output) {
+    if (output != AUDIO_IO_HANDLE_NONE) {
         PlaybackThread *thread = checkPlaybackThread_l(output);
         if (thread == NULL) {
             return 0.0f;
@@ -959,8 +959,8 @@ status_t AudioFlinger::setParameters(audio_io_handle_t ioHandle, const String8&
         return PERMISSION_DENIED;
     }
 
-    // ioHandle == 0 means the parameters are global to the audio hardware interface
-    if (ioHandle == 0) {
+    // AUDIO_IO_HANDLE_NONE means the parameters are global to the audio hardware interface
+    if (ioHandle == AUDIO_IO_HANDLE_NONE) {
         Mutex::Autolock _l(mLock);
         status_t final_result = NO_ERROR;
         {
@@ -1042,7 +1042,7 @@ String8 AudioFlinger::getParameters(audio_io_handle_t ioHandle, const String8& k
 
     Mutex::Autolock _l(mLock);
 
-    if (ioHandle == 0) {
+    if (ioHandle == AUDIO_IO_HANDLE_NONE) {
         String8 out_s8;
 
         for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
@@ -1563,14 +1563,14 @@ audio_io_handle_t AudioFlinger::openOutput(audio_module_handle_t module,
           offloadInfo, offloadInfo == NULL ? -1 : offloadInfo->version);
 
     if (pDevices == NULL || *pDevices == AUDIO_DEVICE_NONE) {
-        return 0;
+        return AUDIO_IO_HANDLE_NONE;
     }
 
     Mutex::Autolock _l(mLock);
 
     AudioHwDevice *outHwDev = findSuitableHwDev_l(module, *pDevices);
     if (outHwDev == NULL) {
-        return 0;
+        return AUDIO_IO_HANDLE_NONE;
     }
 
     audio_hw_device_t *hwDevHal = outHwDev->hwDevice();
@@ -1642,7 +1642,7 @@ audio_io_handle_t AudioFlinger::openOutput(audio_module_handle_t module,
         return id;
     }
 
-    return 0;
+    return AUDIO_IO_HANDLE_NONE;
 }
 
 audio_io_handle_t AudioFlinger::openDuplicateOutput(audio_io_handle_t output1,
@@ -1655,7 +1655,7 @@ audio_io_handle_t AudioFlinger::openDuplicateOutput(audio_io_handle_t output1,
     if (thread1 == NULL || thread2 == NULL) {
         ALOGW("openDuplicateOutput() wrong output mixer type for output %d or %d", output1,
                 output2);
-        return 0;
+        return AUDIO_IO_HANDLE_NONE;
     }
 
     audio_io_handle_t id = nextUniqueId();
@@ -2282,7 +2282,7 @@ sp<IEffect> AudioFlinger::createEffect(
 
         // return effect descriptor
         *pDesc = desc;
-        if (io == 0 && sessionId == AUDIO_SESSION_OUTPUT_MIX) {
+        if (io == AUDIO_IO_HANDLE_NONE && sessionId == AUDIO_SESSION_OUTPUT_MIX) {
             // if the output returned by getOutputForEffect() is removed before we lock the
             // mutex below, the call to checkPlaybackThread_l(io) below will detect it
             // and we will exit safely
@@ -2297,7 +2297,7 @@ sp<IEffect> AudioFlinger::createEffect(
         // If output is 0 here, sessionId is neither SESSION_OUTPUT_STAGE nor SESSION_OUTPUT_MIX
         // because of code checking output when entering the function.
         // Note: io is never 0 when creating an effect on an input
-        if (io == 0) {
+        if (io == AUDIO_IO_HANDLE_NONE) {
             if (sessionId == AUDIO_SESSION_OUTPUT_STAGE) {
                 // output must be specified by AudioPolicyManager when using session
                 // AUDIO_SESSION_OUTPUT_STAGE
@@ -2322,7 +2322,7 @@ sp<IEffect> AudioFlinger::createEffect(
             // If no output thread contains the requested session ID, default to
             // first output. The effect chain will be moved to the correct output
             // thread when a track with the same session ID is created
-            if (io == 0 && mPlaybackThreads.size()) {
+            if (io == AUDIO_IO_HANDLE_NONE && mPlaybackThreads.size() > 0) {
                 io = mPlaybackThreads.keyAt(0);
             }
             ALOGV("createEffect() got io %d for effect %s", io, desc.name);