/*
 * Copyright (C) 2015 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.
 */

//#define LOG_NDEBUG 0
#define LOG_TAG "bt_btif_avrcp_audio_track"

#include "btif_avrcp_audio_track.h"

#include <media/AudioTrack.h>
#include <utils/StrongPointer.h>

#include "osi/include/log.h"

using namespace android;

typedef struct {
    android::sp<android::AudioTrack> track;
} BtifAvrcpAudioTrack;

//#define DUMP_PCM_DATA TRUE
#if (defined(DUMP_PCM_DATA) && (DUMP_PCM_DATA == TRUE))
FILE *outputPcmSampleFile;
char outputFilename[50] = "/data/misc/bluedroid/output_sample.pcm";
#endif

void *BtifAvrcpAudioTrackCreate(int trackFreq, int channelType)
{
    LOG_VERBOSE(LOG_TAG, "%s Track.cpp: btCreateTrack freq %d  channel %d ",
                     __func__, trackFreq, channelType);
    sp<android::AudioTrack> track =
        new android::AudioTrack(AUDIO_STREAM_MUSIC, trackFreq, AUDIO_FORMAT_PCM_16_BIT,
                                channelType, (size_t) 0 /*frameCount*/,
                                (audio_output_flags_t)AUDIO_OUTPUT_FLAG_FAST,
                                NULL /*callback_t*/, NULL /*void* user*/, 0 /*notificationFrames*/,
                                AUDIO_SESSION_ALLOCATE, android::AudioTrack::TRANSFER_SYNC);
    assert(track != NULL);

    BtifAvrcpAudioTrack *trackHolder = new BtifAvrcpAudioTrack;
    assert(trackHolder != NULL);
    trackHolder->track = track;

    if (trackHolder->track->initCheck() != 0)
    {
        return nullptr;
    }

#if (defined(DUMP_PCM_DATA) && (DUMP_PCM_DATA == TRUE))
    outputPcmSampleFile = fopen(outputFilename, "ab");
#endif
    trackHolder->track->setVolume(1, 1);
    return (void *)trackHolder;
}

void BtifAvrcpAudioTrackStart(void *handle)
{
    assert(handle != NULL);
    BtifAvrcpAudioTrack *trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);
    assert(trackHolder != NULL);
    assert(trackHolder->track != NULL);
    LOG_VERBOSE(LOG_TAG, "%s Track.cpp: btStartTrack", __func__);
    trackHolder->track->start();
}

void BtifAvrcpAudioTrackStop(void *handle)
{
    if (handle == NULL) {
        LOG_DEBUG(LOG_TAG, "%s handle is null.", __func__);
        return;
    }
    BtifAvrcpAudioTrack *trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);
    if (trackHolder != NULL && trackHolder->track != NULL) {
        LOG_VERBOSE(LOG_TAG, "%s Track.cpp: btStartTrack", __func__);
        trackHolder->track->stop();
    }
}

void BtifAvrcpAudioTrackDelete(void *handle)
{
    if (handle == NULL) {
        LOG_DEBUG(LOG_TAG, "%s handle is null.", __func__);
        return;
    }
    BtifAvrcpAudioTrack *trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);
    if (trackHolder != NULL && trackHolder->track != NULL) {
        LOG_VERBOSE(LOG_TAG, "%s Track.cpp: btStartTrack", __func__);
        delete trackHolder;
    }

#if (defined(DUMP_PCM_DATA) && (DUMP_PCM_DATA == TRUE))
    if (outputPcmSampleFile)
    {
        fclose(outputPcmSampleFile);
    }
    outputPcmSampleFile = NULL;
#endif
}

void BtifAvrcpAudioTrackPause(void *handle)
{
    if (handle == NULL) {
        LOG_DEBUG(LOG_TAG, "%s handle is null.", __func__);
        return;
    }
    BtifAvrcpAudioTrack *trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);
    if (trackHolder != NULL && trackHolder->track != NULL) {
        LOG_VERBOSE(LOG_TAG, "%s Track.cpp: btStartTrack", __func__);
        trackHolder->track->pause();
        trackHolder->track->flush();
    }
}

void BtifAvrcpSetAudioTrackGain(void *handle, float gain)
{
    if (handle == NULL) {
        LOG_DEBUG(LOG_TAG, "%s handle is null.", __func__);
        return;
    }
    BtifAvrcpAudioTrack *trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);
    if (trackHolder != NULL && trackHolder->track != NULL) {
        LOG_VERBOSE(LOG_TAG, "%s set gain %f", __func__, gain);
        trackHolder->track->setVolume(gain);
    }
}

int BtifAvrcpAudioTrackWriteData(void *handle, void *audioBuffer, int bufferlen)
{
    BtifAvrcpAudioTrack *trackHolder = static_cast<BtifAvrcpAudioTrack*>(handle);
    assert(trackHolder != NULL);
    assert(trackHolder->track != NULL);
    int retval = -1;
#if (defined(DUMP_PCM_DATA) && (DUMP_PCM_DATA == TRUE))
    if (outputPcmSampleFile)
    {
        fwrite ((audioBuffer), 1, (size_t)bufferlen, outputPcmSampleFile);
    }
#endif
    retval = trackHolder->track->write(audioBuffer, (size_t)bufferlen);
    LOG_VERBOSE(LOG_TAG, "%s Track.cpp: btWriteData len = %d ret = %d",
                     __func__, bufferlen, retval);
    return retval;
}