3 ** Copyright 2007, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
18 #include <cutils/properties.h>
21 //#define LOG_NDEBUG 0
23 #define LOG_TAG "AudioHardwareInterface"
24 #include <utils/Log.h>
25 #include <utils/String8.h>
27 #include "AudioHardwareStub.h"
28 #include "AudioHardwareGeneric.h"
30 #include "A2dpAudioInterface.h"
33 #ifdef ENABLE_AUDIO_DUMP
34 #include "AudioDumpInterface.h"
38 // change to 1 to log routing calls
39 #define LOG_ROUTING_CALLS 1
44 static const char* routingModeStrings[] =
55 static const char* routeNone = "NONE";
57 static const char* displayMode(int mode)
59 if ((mode < AudioSystem::MODE_INVALID) || (mode >= AudioSystem::NUM_MODES))
60 return routingModeStrings[0];
61 return routingModeStrings[mode+3];
65 // ----------------------------------------------------------------------------
67 AudioHardwareInterface* AudioHardwareInterface::create()
70 * FIXME: This code needs to instantiate the correct audio device
71 * interface. For now - we use compile-time switches.
73 AudioHardwareInterface* hw = 0;
74 char value[PROPERTY_VALUE_MAX];
77 hw = new AudioHardwareGeneric();
79 // if running in emulation - use the emulator driver
80 if (property_get("ro.kernel.qemu", value, 0)) {
81 LOGD("Running in emulation - using generic audio driver");
82 hw = new AudioHardwareGeneric();
85 LOGV("Creating Vendor Specific AudioHardware");
86 hw = createAudioHardware();
89 if (hw->initCheck() != NO_ERROR) {
90 LOGW("Using stubbed audio hardware. No sound will be produced.");
92 hw = new AudioHardwareStub();
96 hw = new A2dpAudioInterface(hw);
99 #ifdef ENABLE_AUDIO_DUMP
100 // This code adds a record of buffers in a file to write calls made by AudioFlinger.
101 // It replaces the current AudioHardwareInterface object by an intermediate one which
102 // will record buffers in a file (after sending them to hardware) for testing purpose.
103 // This feature is enabled by defining symbol ENABLE_AUDIO_DUMP.
104 // The output file is set with setParameters("test_cmd_file_name=<name>"). Pause are not recorded in the file.
105 LOGV("opening PCM dump interface");
106 hw = new AudioDumpInterface(hw); // replace interface
111 AudioStreamOut::~AudioStreamOut()
115 AudioStreamIn::~AudioStreamIn() {}
117 AudioHardwareBase::AudioHardwareBase()
122 status_t AudioHardwareBase::setMode(int mode)
124 #if LOG_ROUTING_CALLS
125 LOGD("setMode(%s)", displayMode(mode));
127 if ((mode < 0) || (mode >= AudioSystem::NUM_MODES))
130 return ALREADY_EXISTS;
135 // default implementation
136 status_t AudioHardwareBase::setParameters(const String8& keyValuePairs)
141 // default implementation
142 String8 AudioHardwareBase::getParameters(const String8& keys)
144 AudioParameter param = AudioParameter(keys);
145 return param.toString();
148 // default implementation
149 size_t AudioHardwareBase::getInputBufferSize(uint32_t sampleRate, int format, int channelCount)
151 if (sampleRate != 8000) {
152 LOGW("getInputBufferSize bad sampling rate: %d", sampleRate);
155 if (format != AudioSystem::PCM_16_BIT) {
156 LOGW("getInputBufferSize bad format: %d", format);
159 if (channelCount != 1) {
160 LOGW("getInputBufferSize bad channel count: %d", channelCount);
167 status_t AudioHardwareBase::dumpState(int fd, const Vector<String16>& args)
169 const size_t SIZE = 256;
172 snprintf(buffer, SIZE, "AudioHardwareBase::dumpState\n");
173 result.append(buffer);
174 snprintf(buffer, SIZE, "\tmMode: %d\n", mMode);
175 result.append(buffer);
176 ::write(fd, result.string(), result.size());
177 dump(fd, args); // Dump the state of the concrete child.
181 // ----------------------------------------------------------------------------
183 }; // namespace android