media/libaudioclient/include/media/IAudioFlinger.h

/*
 * Copyright (C) 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.
 */

#ifndef ANDROID_IAUDIOFLINGER_H
#define ANDROID_IAUDIOFLINGER_H

#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>

#include <utils/RefBase.h>
#include <utils/Errors.h>
#include <binder/IInterface.h>
#include <binder/Parcel.h>
#include <binder/Parcelable.h>
#include <media/AudioClient.h>
#include <media/DeviceDescriptorBase.h>
#include <media/IAudioTrack.h>
#include <media/IAudioFlingerClient.h>
#include <system/audio.h>
#include <system/audio_effect.h>
#include <system/audio_policy.h>
#include <media/IEffect.h>
#include <media/IEffectClient.h>
#include <utils/String8.h>
#include <media/MicrophoneInfo.h>
#include <vector>

#include "android/media/IAudioRecord.h"
#include "android/media/IAudioTrackCallback.h"

namespace android {

// ----------------------------------------------------------------------------

class IAudioFlinger : public IInterface
{
public:
    DECLARE_META_INTERFACE(AudioFlinger);

    /* CreateTrackInput contains all input arguments sent by AudioTrack to AudioFlinger
     * when calling createTrack() including arguments that will be updated by AudioFlinger
     * and returned in CreateTrackOutput object
     */
    class CreateTrackInput : public Parcelable {
    public:
        status_t readFromParcel(const Parcel *parcel) override {
            /* input arguments*/
            memset(&attr, 0, sizeof(audio_attributes_t));
            if (parcel->read(&attr, sizeof(audio_attributes_t)) != NO_ERROR) {
                return DEAD_OBJECT;
            }
            attr.tags[AUDIO_ATTRIBUTES_TAGS_MAX_SIZE -1] = '\0';
            memset(&config, 0, sizeof(audio_config_t));
            if (parcel->read(&config, sizeof(audio_config_t)) != NO_ERROR) {
                return DEAD_OBJECT;
            }
            if (clientInfo.readFromParcel(parcel) != NO_ERROR) {
                return DEAD_OBJECT;
            }
            if (parcel->readInt32() != 0) {
                // TODO: Using unsecurePointer() has some associated security
                //       pitfalls (see declaration for details).
                //       Either document why it is safe in this case or address
                //       the issue (e.g. by copying).
                sharedBuffer = interface_cast<IMemory>(parcel->readStrongBinder());
                if (sharedBuffer == 0 || sharedBuffer->unsecurePointer() == NULL) {
                    return BAD_VALUE;
                }
            }
            notificationsPerBuffer = parcel->readInt32();
            speed = parcel->readFloat();
            audioTrackCallback = interface_cast<media::IAudioTrackCallback>(
                    parcel->readStrongBinder());

            /* input/output arguments*/
            (void)parcel->read(&flags, sizeof(audio_output_flags_t));
            frameCount = parcel->readInt64();
            notificationFrameCount = parcel->readInt64();
            (void)parcel->read(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->read(&sessionId, sizeof(audio_session_t));
            return NO_ERROR;
        }

        status_t writeToParcel(Parcel *parcel) const override {
            /* input arguments*/
            (void)parcel->write(&attr, sizeof(audio_attributes_t));
            (void)parcel->write(&config, sizeof(audio_config_t));
            (void)clientInfo.writeToParcel(parcel);
            if (sharedBuffer != 0) {
                (void)parcel->writeInt32(1);
                (void)parcel->writeStrongBinder(IInterface::asBinder(sharedBuffer));
            } else {
                (void)parcel->writeInt32(0);
            }
            (void)parcel->writeInt32(notificationsPerBuffer);
            (void)parcel->writeFloat(speed);
            (void)parcel->writeStrongBinder(IInterface::asBinder(audioTrackCallback));

            /* input/output arguments*/
            (void)parcel->write(&flags, sizeof(audio_output_flags_t));
            (void)parcel->writeInt64(frameCount);
            (void)parcel->writeInt64(notificationFrameCount);
            (void)parcel->write(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->write(&sessionId, sizeof(audio_session_t));
            return NO_ERROR;
        }

        /* input */
        audio_attributes_t attr;
        audio_config_t config;
        AudioClient clientInfo;
        sp<IMemory> sharedBuffer;
        uint32_t notificationsPerBuffer;
        float speed;
        sp<media::IAudioTrackCallback> audioTrackCallback;

        /* input/output */
        audio_output_flags_t flags;
        size_t frameCount;
        size_t notificationFrameCount;
        audio_port_handle_t selectedDeviceId;
        audio_session_t sessionId;
    };

    /* CreateTrackOutput contains all output arguments returned by AudioFlinger to AudioTrack
     * when calling createTrack() including arguments that were passed as I/O for update by
     * CreateTrackInput.
     */
    class CreateTrackOutput : public Parcelable {
    public:
        status_t readFromParcel(const Parcel *parcel) override {
            /* input/output arguments*/
            (void)parcel->read(&flags, sizeof(audio_output_flags_t));
            frameCount = parcel->readInt64();
            notificationFrameCount = parcel->readInt64();
            (void)parcel->read(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->read(&sessionId, sizeof(audio_session_t));

            /* output arguments*/
            sampleRate = parcel->readUint32();
            afFrameCount = parcel->readInt64();
            afSampleRate = parcel->readInt64();
            afLatencyMs = parcel->readInt32();
            (void)parcel->read(&outputId, sizeof(audio_io_handle_t));
            (void)parcel->read(&portId, sizeof(audio_port_handle_t));
            return NO_ERROR;
        }

        status_t writeToParcel(Parcel *parcel) const override {
            /* input/output arguments*/
            (void)parcel->write(&flags, sizeof(audio_output_flags_t));
            (void)parcel->writeInt64(frameCount);
            (void)parcel->writeInt64(notificationFrameCount);
            (void)parcel->write(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->write(&sessionId, sizeof(audio_session_t));

            /* output arguments*/
            (void)parcel->writeUint32(sampleRate);
            (void)parcel->writeInt64(afFrameCount);
            (void)parcel->writeInt64(afSampleRate);
            (void)parcel->writeInt32(afLatencyMs);
            (void)parcel->write(&outputId, sizeof(audio_io_handle_t));
            (void)parcel->write(&portId, sizeof(audio_port_handle_t));
            return NO_ERROR;
        }

        /* input/output */
        audio_output_flags_t flags;
        size_t frameCount;
        size_t notificationFrameCount;
        audio_port_handle_t selectedDeviceId;
        audio_session_t sessionId;

        /* output */
        uint32_t sampleRate;
        size_t   afFrameCount;
        uint32_t afSampleRate;
        uint32_t afLatencyMs;
        audio_io_handle_t outputId;
        audio_port_handle_t portId;
    };

    /* CreateRecordInput contains all input arguments sent by AudioRecord to AudioFlinger
     * when calling createRecord() including arguments that will be updated by AudioFlinger
     * and returned in CreateRecordOutput object
     */
    class CreateRecordInput : public Parcelable {
    public:
        status_t readFromParcel(const Parcel *parcel) override {
            /* input arguments*/
            memset(&attr, 0, sizeof(audio_attributes_t));
            if (parcel->read(&attr, sizeof(audio_attributes_t)) != NO_ERROR) {
                return DEAD_OBJECT;
            }
            attr.tags[AUDIO_ATTRIBUTES_TAGS_MAX_SIZE -1] = '\0';
            memset(&config, 0, sizeof(audio_config_base_t));
            if (parcel->read(&config, sizeof(audio_config_base_t)) != NO_ERROR) {
                return DEAD_OBJECT;
            }
            if (clientInfo.readFromParcel(parcel) != NO_ERROR) {
                return DEAD_OBJECT;
            }
            opPackageName = parcel->readString16();
            if (parcel->read(&riid, sizeof(audio_unique_id_t)) != NO_ERROR) {
                return DEAD_OBJECT;
            }

            /* input/output arguments*/
            (void)parcel->read(&flags, sizeof(audio_input_flags_t));
            frameCount = parcel->readInt64();
            notificationFrameCount = parcel->readInt64();
            (void)parcel->read(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->read(&sessionId, sizeof(audio_session_t));
            return NO_ERROR;
        }

        status_t writeToParcel(Parcel *parcel) const override {
            /* input arguments*/
            (void)parcel->write(&attr, sizeof(audio_attributes_t));
            (void)parcel->write(&config, sizeof(audio_config_base_t));
            (void)clientInfo.writeToParcel(parcel);
            (void)parcel->writeString16(opPackageName);
            (void)parcel->write(&riid, sizeof(audio_unique_id_t));

            /* input/output arguments*/
            (void)parcel->write(&flags, sizeof(audio_input_flags_t));
            (void)parcel->writeInt64(frameCount);
            (void)parcel->writeInt64(notificationFrameCount);
            (void)parcel->write(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->write(&sessionId, sizeof(audio_session_t));
            return NO_ERROR;
        }

        /* input */
        audio_attributes_t attr;
        audio_config_base_t config;
        AudioClient clientInfo;
        String16 opPackageName;
        audio_unique_id_t riid;

        /* input/output */
        audio_input_flags_t flags;
        size_t frameCount;
        size_t notificationFrameCount;
        audio_port_handle_t selectedDeviceId;
        audio_session_t sessionId;
    };

    /* CreateRecordOutput contains all output arguments returned by AudioFlinger to AudioRecord
     * when calling createRecord() including arguments that were passed as I/O for update by
     * CreateRecordInput.
     */
    class CreateRecordOutput : public Parcelable {
    public:
        status_t readFromParcel(const Parcel *parcel) override {
            /* input/output arguments*/
            (void)parcel->read(&flags, sizeof(audio_input_flags_t));
            frameCount = parcel->readInt64();
            notificationFrameCount = parcel->readInt64();
            (void)parcel->read(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->read(&sessionId, sizeof(audio_session_t));

            /* output arguments*/
            sampleRate = parcel->readUint32();
            (void)parcel->read(&inputId, sizeof(audio_io_handle_t));
            if (parcel->readInt32() != 0) {
                cblk = interface_cast<IMemory>(parcel->readStrongBinder());
                // TODO: Using unsecurePointer() has some associated security
                //       pitfalls (see declaration for details).
                //       Either document why it is safe in this case or address
                //       the issue (e.g. by copying).
                if (cblk == 0 || cblk->unsecurePointer() == NULL) {
                    return BAD_VALUE;
                }
            }
            if (parcel->readInt32() != 0) {
                buffers = interface_cast<IMemory>(parcel->readStrongBinder());
                // TODO: Using unsecurePointer() has some associated security
                //       pitfalls (see declaration for details).
                //       Either document why it is safe in this case or address
                //       the issue (e.g. by copying).
                if (buffers == 0 || buffers->unsecurePointer() == NULL) {
                    return BAD_VALUE;
                }
            }
            (void)parcel->read(&portId, sizeof(audio_port_handle_t));
            return NO_ERROR;
        }

        status_t writeToParcel(Parcel *parcel) const override {
            /* input/output arguments*/
            (void)parcel->write(&flags, sizeof(audio_input_flags_t));
            (void)parcel->writeInt64(frameCount);
            (void)parcel->writeInt64(notificationFrameCount);
            (void)parcel->write(&selectedDeviceId, sizeof(audio_port_handle_t));
            (void)parcel->write(&sessionId, sizeof(audio_session_t));

            /* output arguments*/
            (void)parcel->writeUint32(sampleRate);
            (void)parcel->write(&inputId, sizeof(audio_io_handle_t));
            if (cblk != 0) {
                (void)parcel->writeInt32(1);
                (void)parcel->writeStrongBinder(IInterface::asBinder(cblk));
            } else {
                (void)parcel->writeInt32(0);
            }
            if (buffers != 0) {
                (void)parcel->writeInt32(1);
                (void)parcel->writeStrongBinder(IInterface::asBinder(buffers));
            } else {
                (void)parcel->writeInt32(0);
            }
            (void)parcel->write(&portId, sizeof(audio_port_handle_t));

            return NO_ERROR;
        }

        /* input/output */
        audio_input_flags_t flags;
        size_t frameCount;
        size_t notificationFrameCount;
        audio_port_handle_t selectedDeviceId;
        audio_session_t sessionId;

        /* output */
        uint32_t sampleRate;
        audio_io_handle_t inputId;
        sp<IMemory> cblk;
        sp<IMemory> buffers;
        audio_port_handle_t portId;
    };

    // invariant on exit for all APIs that return an sp<>:
    //   (return value != 0) == (*status == NO_ERROR)

    /* create an audio track and registers it with AudioFlinger.
     * return null if the track cannot be created.
     */
    virtual sp<IAudioTrack> createTrack(const CreateTrackInput& input,
                                        CreateTrackOutput& output,
                                        status_t *status) = 0;

    virtual sp<media::IAudioRecord> createRecord(const CreateRecordInput& input,
                                        CreateRecordOutput& output,
                                        status_t *status) = 0;

    // FIXME Surprisingly, format/latency don't work for input handles

    /* query the audio hardware state. This state never changes,
     * and therefore can be cached.
     */
    virtual     uint32_t    sampleRate(audio_io_handle_t ioHandle) const = 0;

    // reserved; formerly channelCount()

    virtual     audio_format_t format(audio_io_handle_t output) const = 0;
    virtual     size_t      frameCount(audio_io_handle_t ioHandle) const = 0;

    // return estimated latency in milliseconds
    virtual     uint32_t    latency(audio_io_handle_t output) const = 0;

    /* set/get the audio hardware state. This will probably be used by
     * the preference panel, mostly.
     */
    virtual     status_t    setMasterVolume(float value) = 0;
    virtual     status_t    setMasterMute(bool muted) = 0;

    virtual     float       masterVolume() const = 0;
    virtual     bool        masterMute() const = 0;

    virtual     status_t    setMasterBalance(float balance) = 0;
    virtual     status_t    getMasterBalance(float *balance) const = 0;

    /* set/get stream type state. This will probably be used by
     * the preference panel, mostly.
     */
    virtual     status_t    setStreamVolume(audio_stream_type_t stream, float value,
                                    audio_io_handle_t output) = 0;
    virtual     status_t    setStreamMute(audio_stream_type_t stream, bool muted) = 0;

    virtual     float       streamVolume(audio_stream_type_t stream,
                                    audio_io_handle_t output) const = 0;
    virtual     bool        streamMute(audio_stream_type_t stream) const = 0;

    // set audio mode
    virtual     status_t    setMode(audio_mode_t mode) = 0;

    // mic mute/state
    virtual     status_t    setMicMute(bool state) = 0;
    virtual     bool        getMicMute() const = 0;
    virtual     void        setRecordSilenced(audio_port_handle_t portId, bool silenced) = 0;

    virtual     status_t    setParameters(audio_io_handle_t ioHandle,
                                    const String8& keyValuePairs) = 0;
    virtual     String8     getParameters(audio_io_handle_t ioHandle, const String8& keys)
                                    const = 0;

    // Register an object to receive audio input/output change and track notifications.
    // For a given calling pid, AudioFlinger disregards any registrations after the first.
    // Thus the IAudioFlingerClient must be a singleton per process.
    virtual void registerClient(const sp<IAudioFlingerClient>& client) = 0;

    // retrieve the audio recording buffer size in bytes
    // FIXME This API assumes a route, and so should be deprecated.
    virtual size_t getInputBufferSize(uint32_t sampleRate, audio_format_t format,
            audio_channel_mask_t channelMask) const = 0;

    virtual status_t openOutput(audio_module_handle_t module,
                                audio_io_handle_t *output,
                                audio_config_t *config,
                                const sp<DeviceDescriptorBase>& device,
                                uint32_t *latencyMs,
                                audio_output_flags_t flags) = 0;
    virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1,
                                    audio_io_handle_t output2) = 0;
    virtual status_t closeOutput(audio_io_handle_t output) = 0;
    virtual status_t suspendOutput(audio_io_handle_t output) = 0;
    virtual status_t restoreOutput(audio_io_handle_t output) = 0;

    virtual status_t openInput(audio_module_handle_t module,
                               audio_io_handle_t *input,
                               audio_config_t *config,
                               audio_devices_t *device,
                               const String8& address,
                               audio_source_t source,
                               audio_input_flags_t flags) = 0;
    virtual status_t closeInput(audio_io_handle_t input) = 0;

    virtual status_t invalidateStream(audio_stream_type_t stream) = 0;

    virtual status_t setVoiceVolume(float volume) = 0;

    virtual status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames,
                                    audio_io_handle_t output) const = 0;

    virtual uint32_t getInputFramesLost(audio_io_handle_t ioHandle) const = 0;

    virtual audio_unique_id_t newAudioUniqueId(audio_unique_id_use_t use) = 0;

    virtual void acquireAudioSessionId(audio_session_t audioSession, pid_t pid, uid_t uid) = 0;
    virtual void releaseAudioSessionId(audio_session_t audioSession, pid_t pid) = 0;

    virtual status_t queryNumberEffects(uint32_t *numEffects) const = 0;

    virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) const = 0;

    virtual status_t getEffectDescriptor(const effect_uuid_t *pEffectUUID,
                                         const effect_uuid_t *pTypeUUID,
                                         uint32_t preferredTypeFlag,
                                         effect_descriptor_t *pDescriptor) const = 0;

    virtual sp<IEffect> createEffect(
                                    effect_descriptor_t *pDesc,
                                    const sp<IEffectClient>& client,
                                    int32_t priority,
                                    // AudioFlinger doesn't take over handle reference from client
                                    audio_io_handle_t output,
                                    audio_session_t sessionId,
                                    const AudioDeviceTypeAddr& device,
                                    const String16& callingPackage,
                                    pid_t pid,
                                    bool probe,
                                    status_t *status,
                                    int *id,
                                    int *enabled) = 0;

    virtual status_t moveEffects(audio_session_t session, audio_io_handle_t srcOutput,
                                    audio_io_handle_t dstOutput) = 0;

    virtual void setEffectSuspended(int effectId,
                                    audio_session_t sessionId,
                                    bool suspended) = 0;

    virtual audio_module_handle_t loadHwModule(const char *name) = 0;

    // helpers for android.media.AudioManager.getProperty(), see description there for meaning
    // FIXME move these APIs to AudioPolicy to permit a more accurate implementation
    // that looks on primary device for a stream with fast flag, primary flag, or first one.
    virtual uint32_t getPrimaryOutputSamplingRate() = 0;
    virtual size_t getPrimaryOutputFrameCount() = 0;

    // Intended for AudioService to inform AudioFlinger of device's low RAM attribute,
    // and should be called at most once.  For a definition of what "low RAM" means, see
    // android.app.ActivityManager.isLowRamDevice().  The totalMemory parameter
    // is obtained from android.app.ActivityManager.MemoryInfo.totalMem.
    virtual status_t setLowRamDevice(bool isLowRamDevice, int64_t totalMemory) = 0;

    /* List available audio ports and their attributes */
    virtual status_t listAudioPorts(unsigned int *num_ports,
                                    struct audio_port *ports) = 0;

    /* Get attributes for a given audio port */
    virtual status_t getAudioPort(struct audio_port *port) = 0;

    /* Create an audio patch between several source and sink ports */
    virtual status_t createAudioPatch(const struct audio_patch *patch,
                                       audio_patch_handle_t *handle) = 0;

    /* Release an audio patch */
    virtual status_t releaseAudioPatch(audio_patch_handle_t handle) = 0;

    /* List existing audio patches */
    virtual status_t listAudioPatches(unsigned int *num_patches,
                                      struct audio_patch *patches) = 0;
    /* Set audio port configuration */
    virtual status_t setAudioPortConfig(const struct audio_port_config *config) = 0;

    /* Get the HW synchronization source used for an audio session */
    virtual audio_hw_sync_t getAudioHwSyncForSession(audio_session_t sessionId) = 0;

    /* Indicate JAVA services are ready (scheduling, power management ...) */
    virtual status_t systemReady() = 0;

    // Returns the number of frames per audio HAL buffer.
    virtual size_t frameCountHAL(audio_io_handle_t ioHandle) const = 0;

    /* List available microphones and their characteristics */
    virtual status_t getMicrophones(std::vector<media::MicrophoneInfo> *microphones) = 0;

    virtual status_t setAudioHalPids(const std::vector<pid_t>& pids) = 0;
};


// ----------------------------------------------------------------------------

class BnAudioFlinger : public BnInterface<IAudioFlinger>
{
public:
    virtual status_t    onTransact( uint32_t code,
                                    const Parcel& data,
                                    Parcel* reply,
                                    uint32_t flags = 0);

    // Requests media.log to start merging log buffers
    virtual void requestLogMerge() = 0;
};

// ----------------------------------------------------------------------------

}; // namespace android

#endif // ANDROID_IAUDIOFLINGER_H