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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_TAG "AudioHardwareInterface"
#include <utils/Log.h>
#include <utils/String8.h>
#include "AudioHardwareStub.h"
#include "AudioHardwareGeneric.h"
//#define DUMP_FLINGER_OUT // if defined allows recording samples in a file
#ifdef DUMP_FLINGER_OUT
#include "AudioDumpInterface.h"
#endif
// change to 1 to log routing calls
#define LOG_ROUTING_CALLS 0
namespace android {
#if LOG_ROUTING_CALLS
static const char* routingModeStrings[] =
{
"OUT OF RANGE",
"INVALID",
"CURRENT",
"NORMAL",
"RINGTONE",
"IN_CALL"
};
static const char* routeStrings[] =
{
"EARPIECE ",
"SPEAKER ",
"BLUETOOTH ",
"HEADSET "
"BLUETOOTH_A2DP "
};
static const char* routeNone = "NONE";
static const char* displayMode(int mode)
{
if ((mode < -2) || (mode > 2))
return routingModeStrings[0];
return routingModeStrings[mode+3];
}
static const char* displayRoutes(uint32_t routes)
{
static char routeStr[80];
if (routes == 0)
return routeNone;
routeStr[0] = 0;
int bitMask = 1;
for (int i = 0; i < 4; ++i, bitMask <<= 1) {
if (routes & bitMask) {
strcat(routeStr, routeStrings[i]);
}
}
routeStr[strlen(routeStr)-1] = 0;
return routeStr;
}
#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 DUMP_FLINGER_OUT
// 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 DUMP_FLINGER_OUT.
// The output file is FLINGER_DUMP_NAME. Pause are not recorded in the file.
hw = new AudioDumpInterface(hw); // replace interface
#endif
return hw;
}
AudioStreamOut::~AudioStreamOut()
{
}
AudioStreamIn::~AudioStreamIn() {}
AudioHardwareBase::AudioHardwareBase()
{
// force a routing update on initialization
memset(&mRoutes, 0, sizeof(mRoutes));
mMode = 0;
}
// generics for audio routing - the real work is done in doRouting
status_t AudioHardwareBase::setRouting(int mode, uint32_t routes)
{
#if LOG_ROUTING_CALLS
LOGD("setRouting: mode=%s, routes=[%s]", displayMode(mode), displayRoutes(routes));
#endif
if (mode == AudioSystem::MODE_CURRENT)
mode = mMode;
if ((mode < 0) || (mode >= AudioSystem::NUM_MODES))
return BAD_VALUE;
uint32_t old = mRoutes[mode];
mRoutes[mode] = routes;
if ((mode != mMode) || (old == routes))
return NO_ERROR;
#if LOG_ROUTING_CALLS
const char* oldRouteStr = strdup(displayRoutes(old));
LOGD("doRouting: mode=%s, old route=[%s], new route=[%s]",
displayMode(mode), oldRouteStr, displayRoutes(routes));
delete oldRouteStr;
#endif
return doRouting();
}
status_t AudioHardwareBase::getRouting(int mode, uint32_t* routes)
{
if (mode == AudioSystem::MODE_CURRENT)
mode = mMode;
if ((mode < 0) || (mode >= AudioSystem::NUM_MODES))
return BAD_VALUE;
*routes = mRoutes[mode];
#if LOG_ROUTING_CALLS
LOGD("getRouting: mode=%s, routes=[%s]",
displayMode(mode), displayRoutes(*routes));
#endif
return NO_ERROR;
}
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 NO_ERROR;
#if LOG_ROUTING_CALLS
LOGD("doRouting: old mode=%s, new mode=%s route=[%s]",
displayMode(mMode), displayMode(mode), displayRoutes(mRoutes[mode]));
#endif
mMode = mode;
return doRouting();
}
status_t AudioHardwareBase::getMode(int* mode)
{
// Implement: set audio routing
*mode = mMode;
return NO_ERROR;
}
status_t AudioHardwareBase::setParameter(const char* key, const char* value)
{
// default implementation is to ignore
return NO_ERROR;
}
// 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);
for (int i = 0, n = AudioSystem::NUM_MODES; i < n; ++i) {
snprintf(buffer, SIZE, "\tmRoutes[%d]: %d\n", i, mRoutes[i]);
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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