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/*
**
** Copyright 2007, 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.
*/
#include <cutils/properties.h>
#include <string.h>
#include <unistd.h>
//#define LOG_NDEBUG 0
#define LOG_TAG "AudioHardwareInterface"
#include <utils/Log.h>
#include <utils/String8.h>
#include "AudioHardwareStub.h"
#include "AudioHardwareGeneric.h"
#ifdef WITH_A2DP
#include "A2dpAudioInterface.h"
#endif
#ifdef ENABLE_AUDIO_DUMP
#include "AudioDumpInterface.h"
#endif
// change to 1 to log routing calls
#define LOG_ROUTING_CALLS 1
namespace android {
#if LOG_ROUTING_CALLS
static const char* routingModeStrings[] =
{
"OUT OF RANGE",
"INVALID",
"CURRENT",
"NORMAL",
"RINGTONE",
"IN_CALL"
};
static const char* routeNone = "NONE";
static const char* displayMode(int mode)
{
if ((mode < -2) || (mode > 2))
return routingModeStrings[0];
return routingModeStrings[mode+3];
}
#endif
// ----------------------------------------------------------------------------
AudioHardwareInterface* AudioHardwareInterface::create()
{
/*
* FIXME: This code needs to instantiate the correct audio device
* interface. For now - we use compile-time switches.
*/
AudioHardwareInterface* hw = 0;
char value[PROPERTY_VALUE_MAX];
#ifdef GENERIC_AUDIO
hw = new AudioHardwareGeneric();
#else
// if running in emulation - use the emulator driver
if (property_get("ro.kernel.qemu", value, 0)) {
LOGD("Running in emulation - using generic audio driver");
hw = new AudioHardwareGeneric();
}
else {
LOGV("Creating Vendor Specific AudioHardware");
hw = createAudioHardware();
}
#endif
if (hw->initCheck() != NO_ERROR) {
LOGW("Using stubbed audio hardware. No sound will be produced.");
delete hw;
hw = new AudioHardwareStub();
}
#ifdef WITH_A2DP
hw = new A2dpAudioInterface(hw);
#endif
#ifdef ENABLE_AUDIO_DUMP
// This code adds a record of buffers in a file to write calls made by AudioFlinger.
// It replaces the current AudioHardwareInterface object by an intermediate one which
// will record buffers in a file (after sending them to hardware) for testing purpose.
// This feature is enabled by defining symbol ENABLE_AUDIO_DUMP.
// The output file is set with setParameters("test_cmd_file_name=<name>"). Pause are not recorded in the file.
LOGV("opening PCM dump interface");
hw = new AudioDumpInterface(hw); // replace interface
#endif
return hw;
}
AudioStreamOut::~AudioStreamOut()
{
}
AudioStreamIn::~AudioStreamIn() {}
AudioHardwareBase::AudioHardwareBase()
{
mMode = 0;
}
status_t AudioHardwareBase::setMode(int mode)
{
#if LOG_ROUTING_CALLS
LOGD("setMode(%s)", displayMode(mode));
#endif
if ((mode < 0) || (mode >= AudioSystem::NUM_MODES))
return BAD_VALUE;
if (mMode == mode)
return ALREADY_EXISTS;
mMode = mode;
return NO_ERROR;
}
// default implementation
status_t AudioHardwareBase::setParameters(const String8& keyValuePairs)
{
return NO_ERROR;
}
// default implementation
String8 AudioHardwareBase::getParameters(const String8& keys)
{
AudioParameter param = AudioParameter(keys);
return param.toString();
}
// default implementation
size_t AudioHardwareBase::getInputBufferSize(uint32_t sampleRate, int format, int channelCount)
{
if (sampleRate != 8000) {
LOGW("getInputBufferSize bad sampling rate: %d", sampleRate);
return 0;
}
if (format != AudioSystem::PCM_16_BIT) {
LOGW("getInputBufferSize bad format: %d", format);
return 0;
}
if (channelCount != 1) {
LOGW("getInputBufferSize bad channel count: %d", channelCount);
return 0;
}
return 320;
}
status_t AudioHardwareBase::dumpState(int fd, const Vector<String16>& args)
{
const size_t SIZE = 256;
char buffer[SIZE];
String8 result;
snprintf(buffer, SIZE, "AudioHardwareBase::dumpState\n");
result.append(buffer);
snprintf(buffer, SIZE, "\tmMode: %d\n", mMode);
result.append(buffer);
::write(fd, result.string(), result.size());
dump(fd, args); // Dump the state of the concrete child.
return NO_ERROR;
}
// ----------------------------------------------------------------------------
}; // namespace android
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