/*
 * 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.
 */

#include "AnotherPacketSource.h"

#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/foundation/AString.h>
#include <media/stagefright/foundation/hexdump.h>
#include <media/stagefright/MediaBuffer.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MetaData.h>
#include <utils/Vector.h>

namespace android {

AnotherPacketSource::AnotherPacketSource(const sp<MetaData> &meta)
    : mFormat(meta),
      mEOSResult(OK) {
}

void AnotherPacketSource::setFormat(const sp<MetaData> &meta) {
    CHECK(mFormat == NULL);
    mFormat = meta;
}

AnotherPacketSource::~AnotherPacketSource() {
}

status_t AnotherPacketSource::start(MetaData *params) {
    return OK;
}

status_t AnotherPacketSource::stop() {
    return OK;
}

sp<MetaData> AnotherPacketSource::getFormat() {
    return mFormat;
}

status_t AnotherPacketSource::dequeueAccessUnit(sp<ABuffer> *buffer) {
    buffer->clear();

    Mutex::Autolock autoLock(mLock);
    while (mEOSResult == OK && mBuffers.empty()) {
        mCondition.wait(mLock);
    }

    if (!mBuffers.empty()) {
        *buffer = *mBuffers.begin();
        mBuffers.erase(mBuffers.begin());

        int32_t discontinuity;
        if ((*buffer)->meta()->findInt32("discontinuity", &discontinuity)) {

            if (discontinuity == ATSParser::DISCONTINUITY_FORMATCHANGE) {
                mFormat.clear();
            }

            return INFO_DISCONTINUITY;
        }

        return OK;
    }

    return mEOSResult;
}

status_t AnotherPacketSource::read(
        MediaBuffer **out, const ReadOptions *) {
    *out = NULL;

    Mutex::Autolock autoLock(mLock);
    while (mEOSResult == OK && mBuffers.empty()) {
        mCondition.wait(mLock);
    }

    if (!mBuffers.empty()) {
        const sp<ABuffer> buffer = *mBuffers.begin();
        mBuffers.erase(mBuffers.begin());

        int32_t discontinuity;
        if (buffer->meta()->findInt32("discontinuity", &discontinuity)) {
            if (discontinuity == ATSParser::DISCONTINUITY_FORMATCHANGE) {
                mFormat.clear();
            }

            return INFO_DISCONTINUITY;
        } else {
            int64_t timeUs;
            CHECK(buffer->meta()->findInt64("timeUs", &timeUs));

            MediaBuffer *mediaBuffer = new MediaBuffer(buffer);

            mediaBuffer->meta_data()->setInt64(kKeyTime, timeUs);

            *out = mediaBuffer;
            return OK;
        }
    }

    return mEOSResult;
}

void AnotherPacketSource::queueAccessUnit(const sp<ABuffer> &buffer) {
    int32_t damaged;
    if (buffer->meta()->findInt32("damaged", &damaged) && damaged) {
        // LOG(VERBOSE) << "discarding damaged AU";
        return;
    }

    int64_t timeUs;
    CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
    LOGV("queueAccessUnit timeUs=%lld us (%.2f secs)", timeUs, timeUs / 1E6);

    Mutex::Autolock autoLock(mLock);
    mBuffers.push_back(buffer);
    mCondition.signal();
}

void AnotherPacketSource::queueDiscontinuity(
        ATSParser::DiscontinuityType type,
        const sp<AMessage> &extra) {
    sp<ABuffer> buffer = new ABuffer(0);
    buffer->meta()->setInt32("discontinuity", static_cast<int32_t>(type));
    buffer->meta()->setMessage("extra", extra);

    Mutex::Autolock autoLock(mLock);

#if 0
    if (type == ATSParser::DISCONTINUITY_SEEK
            || type == ATSParser::DISCONTINUITY_FORMATCHANGE) {
        // XXX Fix this: This will also clear any pending discontinuities,
        // If there's a pending DISCONTINUITY_FORMATCHANGE and the new
        // discontinuity is "just" a DISCONTINUITY_SEEK, this will effectively
        // downgrade the type of discontinuity received by the client.

        mBuffers.clear();
        mEOSResult = OK;
    }
#endif

    mBuffers.push_back(buffer);
    mCondition.signal();
}

void AnotherPacketSource::signalEOS(status_t result) {
    CHECK(result != OK);

    Mutex::Autolock autoLock(mLock);
    mEOSResult = result;
    mCondition.signal();
}

bool AnotherPacketSource::hasBufferAvailable(status_t *finalResult) {
    Mutex::Autolock autoLock(mLock);
    if (!mBuffers.empty()) {
        return true;
    }

    *finalResult = mEOSResult;
    return false;
}

status_t AnotherPacketSource::nextBufferTime(int64_t *timeUs) {
    *timeUs = 0;

    Mutex::Autolock autoLock(mLock);

    if (mBuffers.empty()) {
        return mEOSResult != OK ? mEOSResult : -EWOULDBLOCK;
    }

    sp<ABuffer> buffer = *mBuffers.begin();
    CHECK(buffer->meta()->findInt64("timeUs", timeUs));

    return OK;
}

}  // namespace android