libopensles/IAndroidBufferQueue.c

/*
 * Copyright (C) 2010 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.
 */

/* AndroidBufferQueue implementation */

#include "sles_allinclusive.h"

SLresult IAndroidBufferQueue_RegisterCallback(SLAndroidBufferQueueItf self,
        slAndroidBufferQueueCallback callback, void *pContext)
{
    SL_ENTER_INTERFACE

    IAndroidBufferQueue *this = (IAndroidBufferQueue *) self;

    interface_lock_exclusive(this);

    // verify pre-condition that media object is in the SL_PLAYSTATE_STOPPED state
    // FIXME PRIORITY 1 check play state
    //if (SL_PLAYSTATE_STOPPED == ((CAudioPlayer*) this->mThis)->mPlay.mState) {
        this->mCallback = callback;
        this->mContext = pContext;

        switch (InterfaceToObjectID(this)) {
        case SL_OBJECTID_AUDIOPLAYER:
            result = SL_RESULT_SUCCESS;
            android_audioPlayer_androidBufferQueue_registerCallback_l((CAudioPlayer*) this->mThis);
            break;
        case XA_OBJECTID_MEDIAPLAYER:
            SL_LOGI("IAndroidBufferQueue_RegisterCallback()");
            result = SL_RESULT_SUCCESS;
            android_Player_androidBufferQueue_registerCallback_l((CMediaPlayer*) this->mThis);
        default:
            result = SL_RESULT_PARAMETER_INVALID;
            break;
        }

    //} else {
    //    result = SL_RESULT_PRECONDITIONS_VIOLATED;
    //}

    interface_unlock_exclusive(this);

    SL_LEAVE_INTERFACE
}


SLresult IAndroidBufferQueue_Clear(SLAndroidBufferQueueItf self)
{
    SL_ENTER_INTERFACE

    IAndroidBufferQueue *this = (IAndroidBufferQueue *) self;

    interface_lock_exclusive(this);

    // FIXME return value?
    result = SL_RESULT_SUCCESS;
    android_audioPlayer_androidBufferQueue_clear_l((CAudioPlayer*) this->mThis);

    interface_unlock_exclusive(this);

    SL_LEAVE_INTERFACE
}


SLresult IAndroidBufferQueue_Enqueue(SLAndroidBufferQueueItf self,
        SLuint32 bufferId,
        SLuint32 length,
        SLAbufferQueueEvent event,
        void *pData)
{
    SL_ENTER_INTERFACE

    IAndroidBufferQueue *this = (IAndroidBufferQueue *) self;

    interface_lock_exclusive(this);

    // FIXME return value? of particular interest: error is length is larger than size received
    //   in callback
    switch (InterfaceToObjectID(this)) {
    case SL_OBJECTID_AUDIOPLAYER:
        result = SL_RESULT_SUCCESS;
        android_audioPlayer_androidBufferQueue_enqueue_l((CAudioPlayer*) this->mThis,
                bufferId, length, event, pData);
        break;
    case XA_OBJECTID_MEDIAPLAYER:
        //SL_LOGV("IAndroidBufferQueue_Enqueue()");
        result = SL_RESULT_SUCCESS;
        android_Player_androidBufferQueue_enqueue_l((CMediaPlayer*) this->mThis,
                bufferId, length, event, pData);
        break;
    default:
        result = SL_RESULT_PARAMETER_INVALID;
        break;
    }

    interface_unlock_exclusive(this);

    SL_LEAVE_INTERFACE
}


static const struct SLAndroidBufferQueueItf_ IAndroidBufferQueue_Itf = {
    IAndroidBufferQueue_RegisterCallback,
    IAndroidBufferQueue_Clear,
    IAndroidBufferQueue_Enqueue
};

void IAndroidBufferQueue_init(void *self)
{
    IAndroidBufferQueue *this = (IAndroidBufferQueue *) self;
    this->mItf = &IAndroidBufferQueue_Itf;

    this->mCallback = NULL;
    this->mContext = NULL;
}