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-rw-r--r--services/radio/RadioService.cpp94
1 files changed, 75 insertions, 19 deletions
diff --git a/services/radio/RadioService.cpp b/services/radio/RadioService.cpp
index 152619b..a6c2bdf 100644
--- a/services/radio/RadioService.cpp
+++ b/services/radio/RadioService.cpp
@@ -22,6 +22,8 @@
#include <sys/types.h>
#include <pthread.h>
+#include <system/audio.h>
+#include <system/audio_policy.h>
#include <system/radio.h>
#include <system/radio_metadata.h>
#include <cutils/atomic.h>
@@ -33,11 +35,13 @@
#include <binder/MemoryBase.h>
#include <binder/MemoryHeapBase.h>
#include <hardware/radio.h>
+#include <media/AudioSystem.h>
#include "RadioService.h"
#include "RadioRegions.h"
namespace android {
+static const char kRadioTunerAudioDeviceName[] = "Radio tuner source";
RadioService::RadioService()
: BnRadioService(), mNextUniqueId(1)
@@ -84,7 +88,7 @@ void RadioService::onFirstRef()
ALOGI("loaded default module %s, handle %d", properties.product, properties.handle);
convertProperties(&properties, &halProperties);
- sp<Module> module = new Module(this, dev, properties);
+ sp<Module> module = new Module(dev, properties);
mModules.add(properties.handle, module);
}
@@ -380,10 +384,8 @@ void RadioService::CallbackThread::sendEvent(radio_hal_event_t *event)
#undef LOG_TAG
#define LOG_TAG "RadioService::Module"
-RadioService::Module::Module(const sp<RadioService>& service,
- radio_hw_device* hwDevice,
- radio_properties properties)
- : mService(service), mHwDevice(hwDevice), mProperties(properties), mMute(true)
+RadioService::Module::Module(radio_hw_device* hwDevice, radio_properties properties)
+ : mHwDevice(hwDevice), mProperties(properties), mMute(true)
{
}
@@ -416,6 +418,31 @@ sp<RadioService::ModuleClient> RadioService::Module::addClient(const sp<IRadioCl
struct radio_hal_band_config halConfig;
halConfig = config->band;
+ // Tuner preemption logic:
+ // There is a limited amount of tuners and a limited amount of radio audio sources per module.
+ // The minimum is one tuner and one audio source.
+ // The numbers of tuners and sources are indicated in the module properties.
+ // NOTE: current framework implementation only supports one radio audio source.
+ // It is possible to open more than one tuner at a time but only one tuner can be connected
+ // to the radio audio source (AUDIO_DEVICE_IN_FM_TUNER).
+ // The base rule is that a newly connected tuner always wins, i.e. always gets a tuner
+ // and can use the audio source if requested.
+ // If another client is preempted, it is notified by a callback with RADIO_EVENT_CONTROL
+ // indicating loss of control.
+ // - If the newly connected client requests the audio source (audio == true):
+ // - if an audio source is available
+ // no problem
+ // - if not:
+ // the oldest client in the list using audio is preempted.
+ // - If the newly connected client does not request the audio source (audio == false):
+ // - if a tuner is available
+ // no problem
+ // - if not:
+ // The oldest client not using audio is preempted first and if none is found the
+ // the oldest client using audio is preempted.
+ // Each time a tuner using the audio source is opened or closed, the audio policy manager is
+ // notified of the connection or disconnection of AUDIO_DEVICE_IN_FM_TUNER.
+
sp<ModuleClient> oldestTuner;
sp<ModuleClient> oldestAudio;
size_t allocatedTuners = 0;
@@ -437,28 +464,31 @@ sp<RadioService::ModuleClient> RadioService::Module::addClient(const sp<IRadioCl
}
const struct radio_tuner *halTuner;
+ sp<ModuleClient> preemtedClient;
if (audio) {
if (allocatedAudio >= mProperties.num_audio_sources) {
ALOG_ASSERT(oldestAudio != 0, "addClient() allocatedAudio/oldestAudio mismatch");
- halTuner = oldestAudio->getTuner();
- oldestAudio->setTuner(NULL);
- mHwDevice->close_tuner(mHwDevice, halTuner);
+ preemtedClient = oldestAudio;
}
} else {
if (allocatedAudio + allocatedTuners >= mProperties.num_tuners) {
if (allocatedTuners != 0) {
ALOG_ASSERT(oldestTuner != 0, "addClient() allocatedTuners/oldestTuner mismatch");
- halTuner = oldestTuner->getTuner();
- oldestTuner->setTuner(NULL);
- mHwDevice->close_tuner(mHwDevice, halTuner);
+ preemtedClient = oldestTuner;
} else {
ALOG_ASSERT(oldestAudio != 0, "addClient() allocatedAudio/oldestAudio mismatch");
- halTuner = oldestAudio->getTuner();
- oldestAudio->setTuner(NULL);
- mHwDevice->close_tuner(mHwDevice, halTuner);
+ preemtedClient = oldestAudio;
}
}
}
+ if (preemtedClient != 0) {
+ halTuner = preemtedClient->getTuner();
+ preemtedClient->setTuner(NULL);
+ mHwDevice->close_tuner(mHwDevice, halTuner);
+ if (preemtedClient->audio()) {
+ notifyDeviceConnection(false, "");
+ }
+ }
ret = mHwDevice->open_tuner(mHwDevice, &halConfig, audio,
RadioService::callback, moduleClient->callbackThread().get(),
@@ -467,11 +497,13 @@ sp<RadioService::ModuleClient> RadioService::Module::addClient(const sp<IRadioCl
ALOGV("addClient() setTuner %p", halTuner);
moduleClient->setTuner(halTuner);
mModuleClients.add(moduleClient);
+ if (audio) {
+ notifyDeviceConnection(true, "");
+ }
} else {
moduleClient.clear();
}
- //TODO notify audio device connection to audio policy manager if audio is on
ALOGV("addClient() DONE moduleClient %p", moduleClient.get());
@@ -501,19 +533,32 @@ void RadioService::Module::removeClient(const sp<ModuleClient>& moduleClient) {
}
mHwDevice->close_tuner(mHwDevice, halTuner);
+ if (moduleClient->audio()) {
+ notifyDeviceConnection(false, "");
+ }
- //TODO notify audio device disconnection to audio policy manager if audio was on
mMute = true;
if (mModuleClients.isEmpty()) {
return;
}
+ // Tuner reallocation logic:
+ // When a client is removed and was controlling a tuner, this tuner will be allocated to a
+ // previously preempted client. This client will be notified by a callback with
+ // RADIO_EVENT_CONTROL indicating gain of control.
+ // - If a preempted client is waiting for an audio source and one becomes available:
+ // Allocate the tuner to the most recently added client waiting for an audio source
+ // - If not:
+ // Allocate the tuner to the most recently added client.
+ // Each time a tuner using the audio source is opened or closed, the audio policy manager is
+ // notified of the connection or disconnection of AUDIO_DEVICE_IN_FM_TUNER.
+
sp<ModuleClient> youngestClient;
sp<ModuleClient> youngestClientAudio;
size_t allocatedTuners = 0;
size_t allocatedAudio = 0;
- for (ssize_t i = mModuleClients.size(); i >= 0; i--) {
+ for (ssize_t i = mModuleClients.size() - 1; i >= 0; i--) {
if (mModuleClients[i]->getTuner() == NULL) {
if (mModuleClients[i]->audio()) {
if (youngestClientAudio == 0) {
@@ -550,10 +595,11 @@ void RadioService::Module::removeClient(const sp<ModuleClient>& moduleClient) {
RadioService::callback, moduleClient->callbackThread().get(),
&halTuner);
- //TODO notify audio device connection to audio policy manager if audio is on
-
if (ret == 0) {
youngestClient->setTuner(halTuner);
+ if (youngestClient->audio()) {
+ notifyDeviceConnection(true, "");
+ }
}
}
@@ -583,6 +629,16 @@ const struct radio_band_config *RadioService::Module::getDefaultConfig() const
return &mProperties.bands[0];
}
+void RadioService::Module::notifyDeviceConnection(bool connected,
+ const char *address) {
+ int64_t token = IPCThreadState::self()->clearCallingIdentity();
+ AudioSystem::setDeviceConnectionState(AUDIO_DEVICE_IN_FM_TUNER,
+ connected ? AUDIO_POLICY_DEVICE_STATE_AVAILABLE :
+ AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE,
+ address, kRadioTunerAudioDeviceName);
+ IPCThreadState::self()->restoreCallingIdentity(token);
+}
+
#undef LOG_TAG
#define LOG_TAG "RadioService::ModuleClient"
generated by cgit v1.1 at 2024-05-23 20:44:45 +0000