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/*
* Copyright 2017 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_TAG "AudioStreamLegacy"
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <stdint.h>
#include <aaudio/AAudio.h>
#include <audio_utils/primitives.h>
#include <media/AudioTrack.h>
#include <media/AudioTimestamp.h>
#include <utils/String16.h>
#include "core/AudioStream.h"
#include "legacy/AudioStreamLegacy.h"
using namespace android;
using namespace aaudio;
AudioStreamLegacy::AudioStreamLegacy()
: AudioStream()
, mDeviceCallback(new StreamDeviceCallback(this)) {
}
AudioStreamLegacy::~AudioStreamLegacy() {
}
// Called from AudioTrack.cpp or AudioRecord.cpp
static void AudioStreamLegacy_callback(int event, void* userData, void *info) {
AudioStreamLegacy *streamLegacy = (AudioStreamLegacy *) userData;
streamLegacy->processCallback(event, info);
}
aaudio_legacy_callback_t AudioStreamLegacy::getLegacyCallback() {
return AudioStreamLegacy_callback;
}
aaudio_data_callback_result_t AudioStreamLegacy::callDataCallbackFrames(uint8_t *buffer,
int32_t numFrames) {
void *finalAudioData = buffer;
if (getDirection() == AAUDIO_DIRECTION_INPUT) {
// Increment before because we already got the data from the device.
incrementFramesRead(numFrames);
finalAudioData = (void *) maybeConvertDeviceData(buffer, numFrames);
}
// Call using the AAudio callback interface.
aaudio_data_callback_result_t callbackResult = maybeCallDataCallback(finalAudioData, numFrames);
if (callbackResult == AAUDIO_CALLBACK_RESULT_CONTINUE
&& getDirection() == AAUDIO_DIRECTION_OUTPUT) {
// Increment after because we are going to write the data to the device.
incrementFramesWritten(numFrames);
}
return callbackResult;
}
// Implement FixedBlockProcessor
int32_t AudioStreamLegacy::onProcessFixedBlock(uint8_t *buffer, int32_t numBytes) {
int32_t numFrames = numBytes / getBytesPerDeviceFrame();
return (int32_t) callDataCallbackFrames(buffer, numFrames);
}
void AudioStreamLegacy::processCallbackCommon(aaudio_callback_operation_t opcode, void *info) {
aaudio_data_callback_result_t callbackResult;
// This illegal size can be used to tell AudioRecord or AudioTrack to stop calling us.
// This takes advantage of them killing the stream when they see a size out of range.
// That is an undocumented behavior.
// TODO add to API in AudioRecord and AudioTrack
const size_t SIZE_STOP_CALLBACKS = SIZE_MAX;
switch (opcode) {
case AAUDIO_CALLBACK_OPERATION_PROCESS_DATA: {
(void) checkForDisconnectRequest(true);
// Note that this code assumes an AudioTrack::Buffer is the same as
// AudioRecord::Buffer
// TODO define our own AudioBuffer and pass it from the subclasses.
AudioTrack::Buffer *audioBuffer = static_cast<AudioTrack::Buffer *>(info);
if (getState() == AAUDIO_STREAM_STATE_DISCONNECTED) {
ALOGW("processCallbackCommon() data, stream disconnected");
audioBuffer->size = SIZE_STOP_CALLBACKS;
} else if (!mCallbackEnabled.load()) {
ALOGW("processCallbackCommon() no data because callback disabled");
audioBuffer->size = SIZE_STOP_CALLBACKS;
} else {
if (audioBuffer->frameCount == 0) {
ALOGW("processCallbackCommon() data, frameCount is zero");
return;
}
// If the caller specified an exact size then use a block size adapter.
if (mBlockAdapter != nullptr) {
int32_t byteCount = audioBuffer->frameCount * getBytesPerDeviceFrame();
callbackResult = mBlockAdapter->processVariableBlock(
(uint8_t *) audioBuffer->raw, byteCount);
} else {
// Call using the AAudio callback interface.
callbackResult = callDataCallbackFrames((uint8_t *)audioBuffer->raw,
audioBuffer->frameCount);
}
if (callbackResult == AAUDIO_CALLBACK_RESULT_CONTINUE) {
audioBuffer->size = audioBuffer->frameCount * getBytesPerDeviceFrame();
} else {
if (callbackResult == AAUDIO_CALLBACK_RESULT_STOP) {
ALOGD("%s() callback returned AAUDIO_CALLBACK_RESULT_STOP", __func__);
} else {
ALOGW("%s() callback returned invalid result = %d",
__func__, callbackResult);
}
audioBuffer->size = 0;
systemStopFromCallback();
// Disable the callback just in case the system keeps trying to call us.
mCallbackEnabled.store(false);
}
if (updateStateMachine() != AAUDIO_OK) {
forceDisconnect();
mCallbackEnabled.store(false);
}
}
}
break;
// Stream got rerouted so we disconnect.
case AAUDIO_CALLBACK_OPERATION_DISCONNECTED:
ALOGD("processCallbackCommon() stream disconnected");
forceDisconnect();
mCallbackEnabled.store(false);
break;
default:
break;
}
}
aaudio_result_t AudioStreamLegacy::checkForDisconnectRequest(bool errorCallbackEnabled) {
if (mRequestDisconnect.isRequested()) {
ALOGD("checkForDisconnectRequest() mRequestDisconnect acknowledged");
forceDisconnect(errorCallbackEnabled);
mRequestDisconnect.acknowledge();
mCallbackEnabled.store(false);
return AAUDIO_ERROR_DISCONNECTED;
} else {
return AAUDIO_OK;
}
}
void AudioStreamLegacy::forceDisconnect(bool errorCallbackEnabled) {
if (getState() != AAUDIO_STREAM_STATE_DISCONNECTED) {
setState(AAUDIO_STREAM_STATE_DISCONNECTED);
if (errorCallbackEnabled) {
maybeCallErrorCallback(AAUDIO_ERROR_DISCONNECTED);
}
}
}
aaudio_result_t AudioStreamLegacy::getBestTimestamp(clockid_t clockId,
int64_t *framePosition,
int64_t *timeNanoseconds,
ExtendedTimestamp *extendedTimestamp) {
int timebase;
switch (clockId) {
case CLOCK_BOOTTIME:
timebase = ExtendedTimestamp::TIMEBASE_BOOTTIME;
break;
case CLOCK_MONOTONIC:
timebase = ExtendedTimestamp::TIMEBASE_MONOTONIC;
break;
default:
ALOGE("getTimestamp() - Unrecognized clock type %d", (int) clockId);
return AAUDIO_ERROR_ILLEGAL_ARGUMENT;
break;
}
ExtendedTimestamp::Location location = ExtendedTimestamp::Location::LOCATION_INVALID;
int64_t localPosition;
status_t status = extendedTimestamp->getBestTimestamp(&localPosition, timeNanoseconds,
timebase, &location);
if (status == OK) {
// use MonotonicCounter to prevent retrograde motion.
mTimestampPosition.update32((int32_t) localPosition);
*framePosition = mTimestampPosition.get();
}
// ALOGD("getBestTimestamp() fposition: server = %6lld, kernel = %6lld, location = %d",
// (long long) extendedTimestamp->mPosition[ExtendedTimestamp::Location::LOCATION_SERVER],
// (long long) extendedTimestamp->mPosition[ExtendedTimestamp::Location::LOCATION_KERNEL],
// (int)location);
return AAudioConvert_androidToAAudioResult(status);
}
void AudioStreamLegacy::onAudioDeviceUpdate(audio_port_handle_t deviceId)
{
// Device routing is a common source of errors and DISCONNECTS.
// Please leave this log in place.
ALOGD("%s() devId %d => %d", __func__, (int) getDeviceId(), (int)deviceId);
if (getDeviceId() != AAUDIO_UNSPECIFIED && getDeviceId() != deviceId &&
getState() != AAUDIO_STREAM_STATE_DISCONNECTED) {
// Note that isDataCallbackActive() is affected by state so call it before DISCONNECTING.
// If we have a data callback and the stream is active, then ask the data callback
// to DISCONNECT and call the error callback.
if (isDataCallbackActive()) {
ALOGD("onAudioDeviceUpdate() request DISCONNECT in data callback due to device change");
// If the stream is stopped before the data callback has a chance to handle the
// request then the requestStop() and requestPause() methods will handle it after
// the callback has stopped.
mRequestDisconnect.request();
} else {
ALOGD("onAudioDeviceUpdate() DISCONNECT the stream now");
forceDisconnect();
}
}
setDeviceId(deviceId);
}
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