/*
 * 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.
 */

//#define LOG_NDEBUG 0
#define LOG_TAG "ACodec"

#include <media/stagefright/ACodec.h>

#include <binder/MemoryDealer.h>

#include <media/stagefright/foundation/hexdump.h>
#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>

#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/NativeWindowWrapper.h>
#include <media/stagefright/OMXClient.h>

#include <surfaceflinger/Surface.h>
#include <gui/SurfaceTextureClient.h>

#include <OMX_Component.h>

namespace android {

template<class T>
static void InitOMXParams(T *params) {
    params->nSize = sizeof(T);
    params->nVersion.s.nVersionMajor = 1;
    params->nVersion.s.nVersionMinor = 0;
    params->nVersion.s.nRevision = 0;
    params->nVersion.s.nStep = 0;
}

struct CodecObserver : public BnOMXObserver {
    CodecObserver() {}

    void setNotificationMessage(const sp<AMessage> &msg) {
        mNotify = msg;
    }

    // from IOMXObserver
    virtual void onMessage(const omx_message &omx_msg) {
        sp<AMessage> msg = mNotify->dup();

        msg->setInt32("type", omx_msg.type);
        msg->setPointer("node", omx_msg.node);

        switch (omx_msg.type) {
            case omx_message::EVENT:
            {
                msg->setInt32("event", omx_msg.u.event_data.event);
                msg->setInt32("data1", omx_msg.u.event_data.data1);
                msg->setInt32("data2", omx_msg.u.event_data.data2);
                break;
            }

            case omx_message::EMPTY_BUFFER_DONE:
            {
                msg->setPointer("buffer", omx_msg.u.buffer_data.buffer);
                break;
            }

            case omx_message::FILL_BUFFER_DONE:
            {
                msg->setPointer(
                        "buffer", omx_msg.u.extended_buffer_data.buffer);
                msg->setInt32(
                        "range_offset",
                        omx_msg.u.extended_buffer_data.range_offset);
                msg->setInt32(
                        "range_length",
                        omx_msg.u.extended_buffer_data.range_length);
                msg->setInt32(
                        "flags",
                        omx_msg.u.extended_buffer_data.flags);
                msg->setInt64(
                        "timestamp",
                        omx_msg.u.extended_buffer_data.timestamp);
                msg->setPointer(
                        "platform_private",
                        omx_msg.u.extended_buffer_data.platform_private);
                msg->setPointer(
                        "data_ptr",
                        omx_msg.u.extended_buffer_data.data_ptr);
                break;
            }

            default:
                TRESPASS();
                break;
        }

        msg->post();
    }

protected:
    virtual ~CodecObserver() {}

private:
    sp<AMessage> mNotify;

    DISALLOW_EVIL_CONSTRUCTORS(CodecObserver);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::BaseState : public AState {
    BaseState(ACodec *codec, const sp<AState> &parentState = NULL);

protected:
    enum PortMode {
        KEEP_BUFFERS,
        RESUBMIT_BUFFERS,
        FREE_BUFFERS,
    };

    ACodec *mCodec;

    virtual PortMode getPortMode(OMX_U32 portIndex);

    virtual bool onMessageReceived(const sp<AMessage> &msg);

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

    virtual void onOutputBufferDrained(const sp<AMessage> &msg);
    virtual void onInputBufferFilled(const sp<AMessage> &msg);

    void postFillThisBuffer(BufferInfo *info);

private:
    bool onOMXMessage(const sp<AMessage> &msg);

    bool onOMXEmptyBufferDone(IOMX::buffer_id bufferID);

    bool onOMXFillBufferDone(
            IOMX::buffer_id bufferID,
            size_t rangeOffset, size_t rangeLength,
            OMX_U32 flags,
            int64_t timeUs,
            void *platformPrivate,
            void *dataPtr);

    void getMoreInputDataIfPossible();

    DISALLOW_EVIL_CONSTRUCTORS(BaseState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::UninitializedState : public ACodec::BaseState {
    UninitializedState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);

private:
    void onSetup(const sp<AMessage> &msg);

    DISALLOW_EVIL_CONSTRUCTORS(UninitializedState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::LoadedToIdleState : public ACodec::BaseState {
    LoadedToIdleState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);
    virtual void stateEntered();

private:
    status_t allocateBuffers();

    DISALLOW_EVIL_CONSTRUCTORS(LoadedToIdleState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::IdleToExecutingState : public ACodec::BaseState {
    IdleToExecutingState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);
    virtual void stateEntered();

private:
    DISALLOW_EVIL_CONSTRUCTORS(IdleToExecutingState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::ExecutingState : public ACodec::BaseState {
    ExecutingState(ACodec *codec);

    void submitOutputBuffers();

    // Submit output buffers to the decoder, submit input buffers to client
    // to fill with data.
    void resume();

    // Returns true iff input and output buffers are in play.
    bool active() const { return mActive; }

protected:
    virtual PortMode getPortMode(OMX_U32 portIndex);
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual void stateEntered();

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

private:
    bool mActive;

    DISALLOW_EVIL_CONSTRUCTORS(ExecutingState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::OutputPortSettingsChangedState : public ACodec::BaseState {
    OutputPortSettingsChangedState(ACodec *codec);

protected:
    virtual PortMode getPortMode(OMX_U32 portIndex);
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual void stateEntered();

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

private:
    DISALLOW_EVIL_CONSTRUCTORS(OutputPortSettingsChangedState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::ExecutingToIdleState : public ACodec::BaseState {
    ExecutingToIdleState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual void stateEntered();

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

    virtual void onOutputBufferDrained(const sp<AMessage> &msg);
    virtual void onInputBufferFilled(const sp<AMessage> &msg);

private:
    void changeStateIfWeOwnAllBuffers();

    DISALLOW_EVIL_CONSTRUCTORS(ExecutingToIdleState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::IdleToLoadedState : public ACodec::BaseState {
    IdleToLoadedState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual void stateEntered();

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

private:
    DISALLOW_EVIL_CONSTRUCTORS(IdleToLoadedState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::ErrorState : public ACodec::BaseState {
    ErrorState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual void stateEntered();

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

private:
    DISALLOW_EVIL_CONSTRUCTORS(ErrorState);
};

////////////////////////////////////////////////////////////////////////////////

struct ACodec::FlushingState : public ACodec::BaseState {
    FlushingState(ACodec *codec);

protected:
    virtual bool onMessageReceived(const sp<AMessage> &msg);
    virtual void stateEntered();

    virtual bool onOMXEvent(OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2);

    virtual void onOutputBufferDrained(const sp<AMessage> &msg);
    virtual void onInputBufferFilled(const sp<AMessage> &msg);

private:
    bool mFlushComplete[2];

    void changeStateIfWeOwnAllBuffers();

    DISALLOW_EVIL_CONSTRUCTORS(FlushingState);
};

////////////////////////////////////////////////////////////////////////////////

ACodec::ACodec()
    : mNode(NULL),
      mSentFormat(false) {
    mUninitializedState = new UninitializedState(this);
    mLoadedToIdleState = new LoadedToIdleState(this);
    mIdleToExecutingState = new IdleToExecutingState(this);
    mExecutingState = new ExecutingState(this);

    mOutputPortSettingsChangedState =
        new OutputPortSettingsChangedState(this);

    mExecutingToIdleState = new ExecutingToIdleState(this);
    mIdleToLoadedState = new IdleToLoadedState(this);
    mErrorState = new ErrorState(this);
    mFlushingState = new FlushingState(this);

    mPortEOS[kPortIndexInput] = mPortEOS[kPortIndexOutput] = false;

    changeState(mUninitializedState);
}

ACodec::~ACodec() {
}

void ACodec::setNotificationMessage(const sp<AMessage> &msg) {
    mNotify = msg;
}

void ACodec::initiateSetup(const sp<AMessage> &msg) {
    msg->setWhat(kWhatSetup);
    msg->setTarget(id());
    msg->post();
}

void ACodec::signalFlush() {
    (new AMessage(kWhatFlush, id()))->post();
}

void ACodec::signalResume() {
    (new AMessage(kWhatResume, id()))->post();
}

void ACodec::initiateShutdown() {
    (new AMessage(kWhatShutdown, id()))->post();
}

status_t ACodec::allocateBuffersOnPort(OMX_U32 portIndex) {
    CHECK(portIndex == kPortIndexInput || portIndex == kPortIndexOutput);

    CHECK(mDealer[portIndex] == NULL);
    CHECK(mBuffers[portIndex].isEmpty());

    if (mNativeWindow != NULL && portIndex == kPortIndexOutput) {
        return allocateOutputBuffersFromNativeWindow();
    }

    OMX_PARAM_PORTDEFINITIONTYPE def;
    InitOMXParams(&def);
    def.nPortIndex = portIndex;

    status_t err = mOMX->getParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    if (err != OK) {
        return err;
    }

    LOGV("[%s] Allocating %lu buffers of size %lu on %s port",
            mComponentName.c_str(),
            def.nBufferCountActual, def.nBufferSize,
            portIndex == kPortIndexInput ? "input" : "output");

    size_t totalSize = def.nBufferCountActual * def.nBufferSize;
    mDealer[portIndex] = new MemoryDealer(totalSize, "OMXCodec");

    for (OMX_U32 i = 0; i < def.nBufferCountActual; ++i) {
        sp<IMemory> mem = mDealer[portIndex]->allocate(def.nBufferSize);
        CHECK(mem.get() != NULL);

        IOMX::buffer_id buffer;
#if 0
        err = mOMX->allocateBufferWithBackup(mNode, portIndex, mem, &buffer);
#else
        err = mOMX->useBuffer(mNode, portIndex, mem, &buffer);
#endif

        if (err != OK) {
            return err;
        }

        BufferInfo info;
        info.mBufferID = buffer;
        info.mStatus = BufferInfo::OWNED_BY_US;
        info.mData = new ABuffer(mem->pointer(), def.nBufferSize);
        mBuffers[portIndex].push(info);
    }

    return OK;
}

status_t ACodec::allocateOutputBuffersFromNativeWindow() {
    OMX_PARAM_PORTDEFINITIONTYPE def;
    InitOMXParams(&def);
    def.nPortIndex = kPortIndexOutput;

    status_t err = mOMX->getParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    if (err != OK) {
        return err;
    }

    err = native_window_set_buffers_geometry(
            mNativeWindow.get(),
            def.format.video.nFrameWidth,
            def.format.video.nFrameHeight,
            def.format.video.eColorFormat);

    if (err != 0) {
        LOGE("native_window_set_buffers_geometry failed: %s (%d)",
                strerror(-err), -err);
        return err;
    }

    // Set up the native window.
    OMX_U32 usage = 0;
    err = mOMX->getGraphicBufferUsage(mNode, kPortIndexOutput, &usage);
    if (err != 0) {
        LOGW("querying usage flags from OMX IL component failed: %d", err);
        // XXX: Currently this error is logged, but not fatal.
        usage = 0;
    }

    err = native_window_set_usage(
            mNativeWindow.get(),
            usage | GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_EXTERNAL_DISP);

    if (err != 0) {
        LOGE("native_window_set_usage failed: %s (%d)", strerror(-err), -err);
        return err;
    }

    int minUndequeuedBufs = 0;
    err = mNativeWindow->query(
            mNativeWindow.get(), NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS,
            &minUndequeuedBufs);

    if (err != 0) {
        LOGE("NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS query failed: %s (%d)",
                strerror(-err), -err);
        return err;
    }

    // XXX: Is this the right logic to use?  It's not clear to me what the OMX
    // buffer counts refer to - how do they account for the renderer holding on
    // to buffers?
    if (def.nBufferCountActual < def.nBufferCountMin + minUndequeuedBufs) {
        OMX_U32 newBufferCount = def.nBufferCountMin + minUndequeuedBufs;
        def.nBufferCountActual = newBufferCount;
        err = mOMX->setParameter(
                mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

        if (err != OK) {
            LOGE("[%s] setting nBufferCountActual to %lu failed: %d",
                    mComponentName.c_str(), newBufferCount, err);
            return err;
        }
    }

    err = native_window_set_buffer_count(
            mNativeWindow.get(), def.nBufferCountActual);

    if (err != 0) {
        LOGE("native_window_set_buffer_count failed: %s (%d)", strerror(-err),
                -err);
        return err;
    }

    LOGV("[%s] Allocating %lu buffers from a native window of size %lu on "
         "output port",
         mComponentName.c_str(), def.nBufferCountActual, def.nBufferSize);

    // Dequeue buffers and send them to OMX
    for (OMX_U32 i = 0; i < def.nBufferCountActual; i++) {
        android_native_buffer_t *buf;
        err = mNativeWindow->dequeueBuffer(mNativeWindow.get(), &buf);
        if (err != 0) {
            LOGE("dequeueBuffer failed: %s (%d)", strerror(-err), -err);
            break;
        }

        sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(buf, false));
        BufferInfo info;
        info.mStatus = BufferInfo::OWNED_BY_US;
        info.mData = new ABuffer(0);
        info.mGraphicBuffer = graphicBuffer;
        mBuffers[kPortIndexOutput].push(info);

        IOMX::buffer_id bufferId;
        err = mOMX->useGraphicBuffer(mNode, kPortIndexOutput, graphicBuffer,
                &bufferId);
        if (err != 0) {
            LOGE("registering GraphicBuffer %lu with OMX IL component failed: "
                 "%d", i, err);
            break;
        }

        mBuffers[kPortIndexOutput].editItemAt(i).mBufferID = bufferId;

        LOGV("[%s] Registered graphic buffer with ID %p (pointer = %p)",
             mComponentName.c_str(),
             bufferId, graphicBuffer.get());
    }

    OMX_U32 cancelStart;
    OMX_U32 cancelEnd;

    if (err != 0) {
        // If an error occurred while dequeuing we need to cancel any buffers
        // that were dequeued.
        cancelStart = 0;
        cancelEnd = mBuffers[kPortIndexOutput].size();
    } else {
        // Return the last two buffers to the native window.
        cancelStart = def.nBufferCountActual - minUndequeuedBufs;
        cancelEnd = def.nBufferCountActual;
    }

    for (OMX_U32 i = cancelStart; i < cancelEnd; i++) {
        BufferInfo *info = &mBuffers[kPortIndexOutput].editItemAt(i);
        cancelBufferToNativeWindow(info);
    }

    return err;
}

status_t ACodec::cancelBufferToNativeWindow(BufferInfo *info) {
    CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_US);

    LOGV("[%s] Calling cancelBuffer on buffer %p",
         mComponentName.c_str(), info->mBufferID);

    int err = mNativeWindow->cancelBuffer(
        mNativeWindow.get(), info->mGraphicBuffer.get());

    CHECK_EQ(err, 0);

    info->mStatus = BufferInfo::OWNED_BY_NATIVE_WINDOW;

    return OK;
}

ACodec::BufferInfo *ACodec::dequeueBufferFromNativeWindow() {
    android_native_buffer_t *buf;
    CHECK_EQ(mNativeWindow->dequeueBuffer(mNativeWindow.get(), &buf), 0);

    for (size_t i = mBuffers[kPortIndexOutput].size(); i-- > 0;) {
        BufferInfo *info =
            &mBuffers[kPortIndexOutput].editItemAt(i);

        if (info->mGraphicBuffer->handle == buf->handle) {
            CHECK_EQ((int)info->mStatus,
                     (int)BufferInfo::OWNED_BY_NATIVE_WINDOW);

            info->mStatus = BufferInfo::OWNED_BY_US;

            return info;
        }
    }

    TRESPASS();

    return NULL;
}

status_t ACodec::freeBuffersOnPort(OMX_U32 portIndex) {
    for (size_t i = mBuffers[portIndex].size(); i-- > 0;) {
        CHECK_EQ((status_t)OK, freeBuffer(portIndex, i));
    }

    mDealer[portIndex].clear();

    return OK;
}

status_t ACodec::freeOutputBuffersNotOwnedByComponent() {
    for (size_t i = mBuffers[kPortIndexOutput].size(); i-- > 0;) {
        BufferInfo *info =
            &mBuffers[kPortIndexOutput].editItemAt(i);

        if (info->mStatus !=
                BufferInfo::OWNED_BY_COMPONENT) {
            // We shouldn't have sent out any buffers to the client at this
            // point.
            CHECK_NE((int)info->mStatus, (int)BufferInfo::OWNED_BY_DOWNSTREAM);

            CHECK_EQ((status_t)OK, freeBuffer(kPortIndexOutput, i));
        }
    }

    return OK;
}

status_t ACodec::freeBuffer(OMX_U32 portIndex, size_t i) {
    BufferInfo *info = &mBuffers[portIndex].editItemAt(i);

    CHECK(info->mStatus == BufferInfo::OWNED_BY_US
            || info->mStatus == BufferInfo::OWNED_BY_NATIVE_WINDOW);

    if (portIndex == kPortIndexOutput && mNativeWindow != NULL
            && info->mStatus == BufferInfo::OWNED_BY_US) {
        CHECK_EQ((status_t)OK, cancelBufferToNativeWindow(info));
    }

    CHECK_EQ(mOMX->freeBuffer(
                mNode, portIndex, info->mBufferID),
             (status_t)OK);

    mBuffers[portIndex].removeAt(i);

    return OK;
}

ACodec::BufferInfo *ACodec::findBufferByID(
        uint32_t portIndex, IOMX::buffer_id bufferID,
        ssize_t *index) {
    for (size_t i = 0; i < mBuffers[portIndex].size(); ++i) {
        BufferInfo *info = &mBuffers[portIndex].editItemAt(i);

        if (info->mBufferID == bufferID) {
            if (index != NULL) {
                *index = i;
            }
            return info;
        }
    }

    TRESPASS();

    return NULL;
}

void ACodec::setComponentRole(
        bool isEncoder, const char *mime) {
    struct MimeToRole {
        const char *mime;
        const char *decoderRole;
        const char *encoderRole;
    };

    static const MimeToRole kMimeToRole[] = {
        { MEDIA_MIMETYPE_AUDIO_MPEG,
            "audio_decoder.mp3", "audio_encoder.mp3" },
        { MEDIA_MIMETYPE_AUDIO_AMR_NB,
            "audio_decoder.amrnb", "audio_encoder.amrnb" },
        { MEDIA_MIMETYPE_AUDIO_AMR_WB,
            "audio_decoder.amrwb", "audio_encoder.amrwb" },
        { MEDIA_MIMETYPE_AUDIO_AAC,
            "audio_decoder.aac", "audio_encoder.aac" },
        { MEDIA_MIMETYPE_VIDEO_AVC,
            "video_decoder.avc", "video_encoder.avc" },
        { MEDIA_MIMETYPE_VIDEO_MPEG4,
            "video_decoder.mpeg4", "video_encoder.mpeg4" },
        { MEDIA_MIMETYPE_VIDEO_H263,
            "video_decoder.h263", "video_encoder.h263" },
    };

    static const size_t kNumMimeToRole =
        sizeof(kMimeToRole) / sizeof(kMimeToRole[0]);

    size_t i;
    for (i = 0; i < kNumMimeToRole; ++i) {
        if (!strcasecmp(mime, kMimeToRole[i].mime)) {
            break;
        }
    }

    if (i == kNumMimeToRole) {
        return;
    }

    const char *role =
        isEncoder ? kMimeToRole[i].encoderRole
                  : kMimeToRole[i].decoderRole;

    if (role != NULL) {
        OMX_PARAM_COMPONENTROLETYPE roleParams;
        InitOMXParams(&roleParams);

        strncpy((char *)roleParams.cRole,
                role, OMX_MAX_STRINGNAME_SIZE - 1);

        roleParams.cRole[OMX_MAX_STRINGNAME_SIZE - 1] = '\0';

        status_t err = mOMX->setParameter(
                mNode, OMX_IndexParamStandardComponentRole,
                &roleParams, sizeof(roleParams));

        if (err != OK) {
            LOGW("[%s] Failed to set standard component role '%s'.",
                 mComponentName.c_str(), role);
        }
    }
}

void ACodec::configureCodec(
        const char *mime, const sp<AMessage> &msg) {
    setComponentRole(false /* isEncoder */, mime);

    if (!strncasecmp(mime, "video/", 6)) {
        int32_t width, height;
        CHECK(msg->findInt32("width", &width));
        CHECK(msg->findInt32("height", &height));

        CHECK_EQ(setupVideoDecoder(mime, width, height),
                 (status_t)OK);
    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) {
        int32_t numChannels, sampleRate;
        CHECK(msg->findInt32("channel-count", &numChannels));
        CHECK(msg->findInt32("sample-rate", &sampleRate));

        CHECK_EQ(setupAACDecoder(numChannels, sampleRate), (status_t)OK);
    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_MPEG)) {
    } else {
        TRESPASS();
    }

    int32_t maxInputSize;
    if (msg->findInt32("max-input-size", &maxInputSize)) {
        CHECK_EQ(setMinBufferSize(kPortIndexInput, (size_t)maxInputSize),
                 (status_t)OK);
    } else if (!strcmp("OMX.Nvidia.aac.decoder", mComponentName.c_str())) {
        CHECK_EQ(setMinBufferSize(kPortIndexInput, 8192),  // XXX
                 (status_t)OK);
    }
}

status_t ACodec::setMinBufferSize(OMX_U32 portIndex, size_t size) {
    OMX_PARAM_PORTDEFINITIONTYPE def;
    InitOMXParams(&def);
    def.nPortIndex = portIndex;

    status_t err = mOMX->getParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    if (err != OK) {
        return err;
    }

    if (def.nBufferSize >= size) {
        return OK;
    }

    def.nBufferSize = size;

    err = mOMX->setParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    if (err != OK) {
        return err;
    }

    err = mOMX->getParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    if (err != OK) {
        return err;
    }

    CHECK(def.nBufferSize >= size);

    return OK;
}

status_t ACodec::setupAACDecoder(int32_t numChannels, int32_t sampleRate) {
    OMX_AUDIO_PARAM_AACPROFILETYPE profile;
    InitOMXParams(&profile);
    profile.nPortIndex = kPortIndexInput;

    status_t err = mOMX->getParameter(
            mNode, OMX_IndexParamAudioAac, &profile, sizeof(profile));

    if (err != OK) {
        return err;
    }

    profile.nChannels = numChannels;
    profile.nSampleRate = sampleRate;
    profile.eAACStreamFormat = OMX_AUDIO_AACStreamFormatMP4ADTS;

    err = mOMX->setParameter(
            mNode, OMX_IndexParamAudioAac, &profile, sizeof(profile));

    return err;
}

status_t ACodec::setVideoPortFormatType(
        OMX_U32 portIndex,
        OMX_VIDEO_CODINGTYPE compressionFormat,
        OMX_COLOR_FORMATTYPE colorFormat) {
    OMX_VIDEO_PARAM_PORTFORMATTYPE format;
    InitOMXParams(&format);
    format.nPortIndex = portIndex;
    format.nIndex = 0;
    bool found = false;

    OMX_U32 index = 0;
    for (;;) {
        format.nIndex = index;
        status_t err = mOMX->getParameter(
                mNode, OMX_IndexParamVideoPortFormat,
                &format, sizeof(format));

        if (err != OK) {
            return err;
        }

        // The following assertion is violated by TI's video decoder.
        // CHECK_EQ(format.nIndex, index);

        if (!strcmp("OMX.TI.Video.encoder", mComponentName.c_str())) {
            if (portIndex == kPortIndexInput
                    && colorFormat == format.eColorFormat) {
                // eCompressionFormat does not seem right.
                found = true;
                break;
            }
            if (portIndex == kPortIndexOutput
                    && compressionFormat == format.eCompressionFormat) {
                // eColorFormat does not seem right.
                found = true;
                break;
            }
        }

        if (format.eCompressionFormat == compressionFormat
            && format.eColorFormat == colorFormat) {
            found = true;
            break;
        }

        ++index;
    }

    if (!found) {
        return UNKNOWN_ERROR;
    }

    status_t err = mOMX->setParameter(
            mNode, OMX_IndexParamVideoPortFormat,
            &format, sizeof(format));

    return err;
}

status_t ACodec::setSupportedOutputFormat() {
    OMX_VIDEO_PARAM_PORTFORMATTYPE format;
    InitOMXParams(&format);
    format.nPortIndex = kPortIndexOutput;
    format.nIndex = 0;

    status_t err = mOMX->getParameter(
            mNode, OMX_IndexParamVideoPortFormat,
            &format, sizeof(format));
    CHECK_EQ(err, (status_t)OK);
    CHECK_EQ((int)format.eCompressionFormat, (int)OMX_VIDEO_CodingUnused);

    static const int OMX_QCOM_COLOR_FormatYVU420SemiPlanar = 0x7FA30C00;

    CHECK(format.eColorFormat == OMX_COLOR_FormatYUV420Planar
           || format.eColorFormat == OMX_COLOR_FormatYUV420SemiPlanar
           || format.eColorFormat == OMX_COLOR_FormatCbYCrY
           || format.eColorFormat == OMX_QCOM_COLOR_FormatYVU420SemiPlanar);

    return mOMX->setParameter(
            mNode, OMX_IndexParamVideoPortFormat,
            &format, sizeof(format));
}

status_t ACodec::setupVideoDecoder(
        const char *mime, int32_t width, int32_t height) {
    OMX_VIDEO_CODINGTYPE compressionFormat = OMX_VIDEO_CodingUnused;
    if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
        compressionFormat = OMX_VIDEO_CodingAVC;
    } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) {
        compressionFormat = OMX_VIDEO_CodingMPEG4;
    } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) {
        compressionFormat = OMX_VIDEO_CodingH263;
    } else {
        TRESPASS();
    }

    status_t err = setVideoPortFormatType(
            kPortIndexInput, compressionFormat, OMX_COLOR_FormatUnused);

    if (err != OK) {
        return err;
    }

    err = setSupportedOutputFormat();

    if (err != OK) {
        return err;
    }

    err = setVideoFormatOnPort(
            kPortIndexInput, width, height, compressionFormat);

    if (err != OK) {
        return err;
    }

    err = setVideoFormatOnPort(
            kPortIndexOutput, width, height, OMX_VIDEO_CodingUnused);

    if (err != OK) {
        return err;
    }

    return OK;
}

status_t ACodec::setVideoFormatOnPort(
        OMX_U32 portIndex,
        int32_t width, int32_t height, OMX_VIDEO_CODINGTYPE compressionFormat) {
    OMX_PARAM_PORTDEFINITIONTYPE def;
    InitOMXParams(&def);
    def.nPortIndex = portIndex;

    OMX_VIDEO_PORTDEFINITIONTYPE *video_def = &def.format.video;

    status_t err = mOMX->getParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    CHECK_EQ(err, (status_t)OK);

    if (portIndex == kPortIndexInput) {
        // XXX Need a (much) better heuristic to compute input buffer sizes.
        const size_t X = 64 * 1024;
        if (def.nBufferSize < X) {
            def.nBufferSize = X;
        }
    }

    CHECK_EQ((int)def.eDomain, (int)OMX_PortDomainVideo);

    video_def->nFrameWidth = width;
    video_def->nFrameHeight = height;

    if (portIndex == kPortIndexInput) {
        video_def->eCompressionFormat = compressionFormat;
        video_def->eColorFormat = OMX_COLOR_FormatUnused;
    }

    err = mOMX->setParameter(
            mNode, OMX_IndexParamPortDefinition, &def, sizeof(def));

    return err;
}

status_t ACodec::initNativeWindow() {
    if (mNativeWindow != NULL) {
        return mOMX->enableGraphicBuffers(mNode, kPortIndexOutput, OMX_TRUE);
    }

    mOMX->enableGraphicBuffers(mNode, kPortIndexOutput, OMX_FALSE);
    return OK;
}

bool ACodec::allYourBuffersAreBelongToUs(
        OMX_U32 portIndex) {
    for (size_t i = 0; i < mBuffers[portIndex].size(); ++i) {
        BufferInfo *info = &mBuffers[portIndex].editItemAt(i);

        if (info->mStatus != BufferInfo::OWNED_BY_US
                && info->mStatus != BufferInfo::OWNED_BY_NATIVE_WINDOW) {
            LOGV("[%s] Buffer %p on port %ld still has status %d",
                    mComponentName.c_str(),
                    info->mBufferID, portIndex, info->mStatus);
            return false;
        }
    }

    return true;
}

bool ACodec::allYourBuffersAreBelongToUs() {
    return allYourBuffersAreBelongToUs(kPortIndexInput)
        && allYourBuffersAreBelongToUs(kPortIndexOutput);
}

void ACodec::deferMessage(const sp<AMessage> &msg) {
    bool wasEmptyBefore = mDeferredQueue.empty();
    mDeferredQueue.push_back(msg);
}

void ACodec::processDeferredMessages() {
    List<sp<AMessage> > queue = mDeferredQueue;
    mDeferredQueue.clear();

    List<sp<AMessage> >::iterator it = queue.begin();
    while (it != queue.end()) {
        onMessageReceived(*it++);
    }
}

void ACodec::sendFormatChange() {
    sp<AMessage> notify = mNotify->dup();
    notify->setInt32("what", kWhatOutputFormatChanged);

    OMX_PARAM_PORTDEFINITIONTYPE def;
    InitOMXParams(&def);
    def.nPortIndex = kPortIndexOutput;

    CHECK_EQ(mOMX->getParameter(
                mNode, OMX_IndexParamPortDefinition, &def, sizeof(def)),
             (status_t)OK);

    CHECK_EQ((int)def.eDir, (int)OMX_DirOutput);

    switch (def.eDomain) {
        case OMX_PortDomainVideo:
        {
            OMX_VIDEO_PORTDEFINITIONTYPE *videoDef = &def.format.video;

            notify->setString("mime", MEDIA_MIMETYPE_VIDEO_RAW);
            notify->setInt32("width", videoDef->nFrameWidth);
            notify->setInt32("height", videoDef->nFrameHeight);

            OMX_CONFIG_RECTTYPE rect;
            InitOMXParams(&rect);
            rect.nPortIndex = kPortIndexOutput;

            if (mOMX->getConfig(
                        mNode, OMX_IndexConfigCommonOutputCrop,
                        &rect, sizeof(rect)) != OK) {
                rect.nLeft = 0;
                rect.nTop = 0;
                rect.nWidth = videoDef->nFrameWidth;
                rect.nHeight = videoDef->nFrameHeight;
            }

            CHECK_GE(rect.nLeft, 0);
            CHECK_GE(rect.nTop, 0);
            CHECK_GE(rect.nWidth, 0u);
            CHECK_GE(rect.nHeight, 0u);
            CHECK_LE(rect.nLeft + rect.nWidth - 1, videoDef->nFrameWidth);
            CHECK_LE(rect.nTop + rect.nHeight - 1, videoDef->nFrameHeight);

            notify->setRect(
                    "crop",
                    rect.nLeft,
                    rect.nTop,
                    rect.nLeft + rect.nWidth - 1,
                    rect.nTop + rect.nHeight - 1);

            if (mNativeWindow != NULL) {
                android_native_rect_t crop;
                crop.left = rect.nLeft;
                crop.top = rect.nTop;
                crop.right = rect.nLeft + rect.nWidth;
                crop.bottom = rect.nTop + rect.nHeight;

                CHECK_EQ(0, native_window_set_crop(
                            mNativeWindow.get(), &crop));
            }
            break;
        }

        case OMX_PortDomainAudio:
        {
            OMX_AUDIO_PORTDEFINITIONTYPE *audioDef = &def.format.audio;
            CHECK_EQ((int)audioDef->eEncoding, (int)OMX_AUDIO_CodingPCM);

            OMX_AUDIO_PARAM_PCMMODETYPE params;
            InitOMXParams(&params);
            params.nPortIndex = kPortIndexOutput;

            CHECK_EQ(mOMX->getParameter(
                        mNode, OMX_IndexParamAudioPcm,
                        &params, sizeof(params)),
                     (status_t)OK);

            CHECK(params.nChannels == 1 || params.bInterleaved);
            CHECK_EQ(params.nBitPerSample, 16u);
            CHECK_EQ((int)params.eNumData, (int)OMX_NumericalDataSigned);
            CHECK_EQ((int)params.ePCMMode, (int)OMX_AUDIO_PCMModeLinear);

            notify->setString("mime", MEDIA_MIMETYPE_AUDIO_RAW);
            notify->setInt32("channel-count", params.nChannels);
            notify->setInt32("sample-rate", params.nSamplingRate);
            break;
        }

        default:
            TRESPASS();
    }

    notify->post();

    mSentFormat = true;
}

////////////////////////////////////////////////////////////////////////////////

ACodec::BaseState::BaseState(ACodec *codec, const sp<AState> &parentState)
    : AState(parentState),
      mCodec(codec) {
}

ACodec::BaseState::PortMode ACodec::BaseState::getPortMode(OMX_U32 portIndex) {
    return KEEP_BUFFERS;
}

bool ACodec::BaseState::onMessageReceived(const sp<AMessage> &msg) {
    switch (msg->what()) {
        case kWhatInputBufferFilled:
        {
            onInputBufferFilled(msg);
            break;
        }

        case kWhatOutputBufferDrained:
        {
            onOutputBufferDrained(msg);
            break;
        }

        case ACodec::kWhatOMXMessage:
        {
            return onOMXMessage(msg);
        }

        default:
            return false;
    }

    return true;
}

bool ACodec::BaseState::onOMXMessage(const sp<AMessage> &msg) {
    int32_t type;
    CHECK(msg->findInt32("type", &type));

    IOMX::node_id nodeID;
    CHECK(msg->findPointer("node", &nodeID));
    CHECK_EQ(nodeID, mCodec->mNode);

    switch (type) {
        case omx_message::EVENT:
        {
            int32_t event, data1, data2;
            CHECK(msg->findInt32("event", &event));
            CHECK(msg->findInt32("data1", &data1));
            CHECK(msg->findInt32("data2", &data2));

            return onOMXEvent(
                    static_cast<OMX_EVENTTYPE>(event),
                    static_cast<OMX_U32>(data1),
                    static_cast<OMX_U32>(data2));
        }

        case omx_message::EMPTY_BUFFER_DONE:
        {
            IOMX::buffer_id bufferID;
            CHECK(msg->findPointer("buffer", &bufferID));

            return onOMXEmptyBufferDone(bufferID);
        }

        case omx_message::FILL_BUFFER_DONE:
        {
            IOMX::buffer_id bufferID;
            CHECK(msg->findPointer("buffer", &bufferID));

            int32_t rangeOffset, rangeLength, flags;
            int64_t timeUs;
            void *platformPrivate;
            void *dataPtr;

            CHECK(msg->findInt32("range_offset", &rangeOffset));
            CHECK(msg->findInt32("range_length", &rangeLength));
            CHECK(msg->findInt32("flags", &flags));
            CHECK(msg->findInt64("timestamp", &timeUs));
            CHECK(msg->findPointer("platform_private", &platformPrivate));
            CHECK(msg->findPointer("data_ptr", &dataPtr));

            return onOMXFillBufferDone(
                    bufferID,
                    (size_t)rangeOffset, (size_t)rangeLength,
                    (OMX_U32)flags,
                    timeUs,
                    platformPrivate,
                    dataPtr);
        }

        default:
            TRESPASS();
            break;
    }
}

bool ACodec::BaseState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    if (event != OMX_EventError) {
        LOGV("[%s] EVENT(%d, 0x%08lx, 0x%08lx)",
             mCodec->mComponentName.c_str(), event, data1, data2);

        return false;
    }

    LOGE("[%s] ERROR(0x%08lx, 0x%08lx)",
         mCodec->mComponentName.c_str(), data1, data2);

    mCodec->changeState(mCodec->mErrorState);

    return true;
}

bool ACodec::BaseState::onOMXEmptyBufferDone(IOMX::buffer_id bufferID) {
    LOGV("[%s] onOMXEmptyBufferDone %p",
         mCodec->mComponentName.c_str(), bufferID);

    BufferInfo *info =
        mCodec->findBufferByID(kPortIndexInput, bufferID);

    CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_COMPONENT);
    info->mStatus = BufferInfo::OWNED_BY_US;

    PortMode mode = getPortMode(kPortIndexInput);

    switch (mode) {
        case KEEP_BUFFERS:
            break;

        case RESUBMIT_BUFFERS:
            postFillThisBuffer(info);
            break;

        default:
        {
            CHECK_EQ((int)mode, (int)FREE_BUFFERS);
            TRESPASS();  // Not currently used
            break;
        }
    }

    return true;
}

void ACodec::BaseState::postFillThisBuffer(BufferInfo *info) {
    if (mCodec->mPortEOS[kPortIndexInput]) {
        return;
    }

    CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_US);

    sp<AMessage> notify = mCodec->mNotify->dup();
    notify->setInt32("what", ACodec::kWhatFillThisBuffer);
    notify->setPointer("buffer-id", info->mBufferID);

    info->mData->meta()->clear();
    notify->setObject("buffer", info->mData);

    sp<AMessage> reply = new AMessage(kWhatInputBufferFilled, mCodec->id());
    reply->setPointer("buffer-id", info->mBufferID);

    notify->setMessage("reply", reply);

    notify->post();

    info->mStatus = BufferInfo::OWNED_BY_UPSTREAM;
}

void ACodec::BaseState::onInputBufferFilled(const sp<AMessage> &msg) {
    IOMX::buffer_id bufferID;
    CHECK(msg->findPointer("buffer-id", &bufferID));

    sp<RefBase> obj;
    int32_t err = OK;
    if (!msg->findObject("buffer", &obj)) {
        CHECK(msg->findInt32("err", &err));

        LOGV("[%s] saw error %d instead of an input buffer",
             mCodec->mComponentName.c_str(), err);

        obj.clear();
    }

    sp<ABuffer> buffer = static_cast<ABuffer *>(obj.get());

    BufferInfo *info = mCodec->findBufferByID(kPortIndexInput, bufferID);
    CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_UPSTREAM);

    info->mStatus = BufferInfo::OWNED_BY_US;

    PortMode mode = getPortMode(kPortIndexInput);

    switch (mode) {
        case KEEP_BUFFERS:
        {
            if (buffer == NULL) {
                mCodec->mPortEOS[kPortIndexInput] = true;
            }
            break;
        }

        case RESUBMIT_BUFFERS:
        {
            if (buffer != NULL) {
                CHECK(!mCodec->mPortEOS[kPortIndexInput]);

                int64_t timeUs;
                CHECK(buffer->meta()->findInt64("timeUs", &timeUs));

                OMX_U32 flags = OMX_BUFFERFLAG_ENDOFFRAME;

                int32_t isCSD;
                if (buffer->meta()->findInt32("csd", &isCSD) && isCSD != 0) {
                    flags |= OMX_BUFFERFLAG_CODECCONFIG;
                }

                if (buffer != info->mData) {
                    if (0 && !(flags & OMX_BUFFERFLAG_CODECCONFIG)) {
                        LOGV("[%s] Needs to copy input data.",
                             mCodec->mComponentName.c_str());
                    }

                    CHECK_LE(buffer->size(), info->mData->capacity());
                    memcpy(info->mData->data(), buffer->data(), buffer->size());
                }

                LOGV("[%s] calling emptyBuffer %p",
                     mCodec->mComponentName.c_str(), bufferID);

                CHECK_EQ(mCodec->mOMX->emptyBuffer(
                            mCodec->mNode,
                            bufferID,
                            0,
                            buffer->size(),
                            flags,
                            timeUs),
                         (status_t)OK);

                info->mStatus = BufferInfo::OWNED_BY_COMPONENT;

                getMoreInputDataIfPossible();
            } else if (!mCodec->mPortEOS[kPortIndexInput]) {
                LOGV("[%s] Signalling EOS on the input port",
                     mCodec->mComponentName.c_str());

                LOGV("[%s] calling emptyBuffer %p",
                     mCodec->mComponentName.c_str(), bufferID);

                CHECK_EQ(mCodec->mOMX->emptyBuffer(
                            mCodec->mNode,
                            bufferID,
                            0,
                            0,
                            OMX_BUFFERFLAG_EOS,
                            0),
                         (status_t)OK);

                info->mStatus = BufferInfo::OWNED_BY_COMPONENT;

                mCodec->mPortEOS[kPortIndexInput] = true;
            }
            break;

            default:
                CHECK_EQ((int)mode, (int)FREE_BUFFERS);
                break;
        }
    }
}

void ACodec::BaseState::getMoreInputDataIfPossible() {
    if (mCodec->mPortEOS[kPortIndexInput]) {
        return;
    }

    BufferInfo *eligible = NULL;

    for (size_t i = 0; i < mCodec->mBuffers[kPortIndexInput].size(); ++i) {
        BufferInfo *info = &mCodec->mBuffers[kPortIndexInput].editItemAt(i);

#if 0
        if (info->mStatus == BufferInfo::OWNED_BY_UPSTREAM) {
            // There's already a "read" pending.
            return;
        }
#endif

        if (info->mStatus == BufferInfo::OWNED_BY_US) {
            eligible = info;
        }
    }

    if (eligible == NULL) {
        return;
    }

    postFillThisBuffer(eligible);
}

bool ACodec::BaseState::onOMXFillBufferDone(
        IOMX::buffer_id bufferID,
        size_t rangeOffset, size_t rangeLength,
        OMX_U32 flags,
        int64_t timeUs,
        void *platformPrivate,
        void *dataPtr) {
    LOGV("[%s] onOMXFillBufferDone %p",
         mCodec->mComponentName.c_str(), bufferID);

    ssize_t index;
    BufferInfo *info =
        mCodec->findBufferByID(kPortIndexOutput, bufferID, &index);

    CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_COMPONENT);

    info->mStatus = BufferInfo::OWNED_BY_US;

    PortMode mode = getPortMode(kPortIndexOutput);

    switch (mode) {
        case KEEP_BUFFERS:
            break;

        case RESUBMIT_BUFFERS:
        {
            if (rangeLength == 0) {
                if (!(flags & OMX_BUFFERFLAG_EOS)) {
                    LOGV("[%s] calling fillBuffer %p",
                         mCodec->mComponentName.c_str(), info->mBufferID);

                    CHECK_EQ(mCodec->mOMX->fillBuffer(
                                mCodec->mNode, info->mBufferID),
                             (status_t)OK);

                    info->mStatus = BufferInfo::OWNED_BY_COMPONENT;
                }
            } else {
                if (!mCodec->mSentFormat) {
                    mCodec->sendFormatChange();
                }

                if (mCodec->mNativeWindow == NULL) {
                    info->mData->setRange(rangeOffset, rangeLength);
                }

                info->mData->meta()->setInt64("timeUs", timeUs);

                sp<AMessage> notify = mCodec->mNotify->dup();
                notify->setInt32("what", ACodec::kWhatDrainThisBuffer);
                notify->setPointer("buffer-id", info->mBufferID);
                notify->setObject("buffer", info->mData);

                sp<AMessage> reply =
                    new AMessage(kWhatOutputBufferDrained, mCodec->id());

                reply->setPointer("buffer-id", info->mBufferID);

                notify->setMessage("reply", reply);

                notify->post();

                info->mStatus = BufferInfo::OWNED_BY_DOWNSTREAM;
            }

            if (flags & OMX_BUFFERFLAG_EOS) {
                sp<AMessage> notify = mCodec->mNotify->dup();
                notify->setInt32("what", ACodec::kWhatEOS);
                notify->post();

                mCodec->mPortEOS[kPortIndexOutput] = true;
            }
            break;
        }

        default:
        {
            CHECK_EQ((int)mode, (int)FREE_BUFFERS);

            CHECK_EQ((status_t)OK,
                     mCodec->freeBuffer(kPortIndexOutput, index));
            break;
        }
    }

    return true;
}

void ACodec::BaseState::onOutputBufferDrained(const sp<AMessage> &msg) {
    IOMX::buffer_id bufferID;
    CHECK(msg->findPointer("buffer-id", &bufferID));

    ssize_t index;
    BufferInfo *info =
        mCodec->findBufferByID(kPortIndexOutput, bufferID, &index);
    CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_DOWNSTREAM);

    int32_t render;
    if (mCodec->mNativeWindow != NULL
            && msg->findInt32("render", &render) && render != 0) {
        // The client wants this buffer to be rendered.

        CHECK_EQ(mCodec->mNativeWindow->queueBuffer(
                    mCodec->mNativeWindow.get(),
                    info->mGraphicBuffer.get()),
                 0);

        info->mStatus = BufferInfo::OWNED_BY_NATIVE_WINDOW;
    } else {
        info->mStatus = BufferInfo::OWNED_BY_US;
    }

    PortMode mode = getPortMode(kPortIndexOutput);

    switch (mode) {
        case KEEP_BUFFERS:
        {
            // XXX fishy, revisit!!! What about the FREE_BUFFERS case below?

            if (info->mStatus == BufferInfo::OWNED_BY_NATIVE_WINDOW) {
                // We cannot resubmit the buffer we just rendered, dequeue
                // the spare instead.

                info = mCodec->dequeueBufferFromNativeWindow();
            }
            break;
        }

        case RESUBMIT_BUFFERS:
        {
            if (!mCodec->mPortEOS[kPortIndexOutput]) {
                if (info->mStatus == BufferInfo::OWNED_BY_NATIVE_WINDOW) {
                    // We cannot resubmit the buffer we just rendered, dequeue
                    // the spare instead.

                    info = mCodec->dequeueBufferFromNativeWindow();
                }

                LOGV("[%s] calling fillBuffer %p",
                     mCodec->mComponentName.c_str(), info->mBufferID);

                CHECK_EQ(mCodec->mOMX->fillBuffer(mCodec->mNode, info->mBufferID),
                         (status_t)OK);

                info->mStatus = BufferInfo::OWNED_BY_COMPONENT;
            }
            break;
        }

        default:
        {
            CHECK_EQ((int)mode, (int)FREE_BUFFERS);

            CHECK_EQ((status_t)OK,
                     mCodec->freeBuffer(kPortIndexOutput, index));
            break;
        }
    }
}

////////////////////////////////////////////////////////////////////////////////

ACodec::UninitializedState::UninitializedState(ACodec *codec)
    : BaseState(codec) {
}

bool ACodec::UninitializedState::onMessageReceived(const sp<AMessage> &msg) {
    bool handled = false;

    switch (msg->what()) {
        case ACodec::kWhatSetup:
        {
            onSetup(msg);

            handled = true;
            break;
        }

        case ACodec::kWhatShutdown:
        {
            sp<AMessage> notify = mCodec->mNotify->dup();
            notify->setInt32("what", ACodec::kWhatShutdownCompleted);
            notify->post();

            handled = true;
        }

        case ACodec::kWhatFlush:
        {
            sp<AMessage> notify = mCodec->mNotify->dup();
            notify->setInt32("what", ACodec::kWhatFlushCompleted);
            notify->post();

            handled = true;
        }

        default:
            return BaseState::onMessageReceived(msg);
    }

    return handled;
}

void ACodec::UninitializedState::onSetup(
        const sp<AMessage> &msg) {
    OMXClient client;
    CHECK_EQ(client.connect(), (status_t)OK);

    sp<IOMX> omx = client.interface();

    AString mime;
    CHECK(msg->findString("mime", &mime));

    AString componentName;

    if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_VIDEO_AVC)) {
        componentName = "OMX.Nvidia.h264.decode";
    } else if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_AUDIO_AAC)) {
        componentName = "OMX.Nvidia.aac.decoder";
    } else if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_AUDIO_MPEG)) {
        componentName = "OMX.Nvidia.mp3.decoder";
    } else {
        TRESPASS();
    }

    sp<CodecObserver> observer = new CodecObserver;

    IOMX::node_id node;
    CHECK_EQ(omx->allocateNode(componentName.c_str(), observer, &node),
             (status_t)OK);

    sp<AMessage> notify = new AMessage(kWhatOMXMessage, mCodec->id());
    observer->setNotificationMessage(notify);

    mCodec->mComponentName = componentName;
    mCodec->mOMX = omx;
    mCodec->mNode = node;

    mCodec->mPortEOS[kPortIndexInput] =
        mCodec->mPortEOS[kPortIndexOutput] = false;

    mCodec->configureCodec(mime.c_str(), msg);

    sp<RefBase> obj;
    if (msg->findObject("native-window", &obj)) {
        sp<NativeWindowWrapper> nativeWindow(
                static_cast<NativeWindowWrapper *>(obj.get()));
        CHECK(nativeWindow != NULL);
        mCodec->mNativeWindow = nativeWindow->getNativeWindow();
    }

    CHECK_EQ((status_t)OK, mCodec->initNativeWindow());

    CHECK_EQ(omx->sendCommand(node, OMX_CommandStateSet, OMX_StateIdle),
             (status_t)OK);

    mCodec->changeState(mCodec->mLoadedToIdleState);
}

////////////////////////////////////////////////////////////////////////////////

ACodec::LoadedToIdleState::LoadedToIdleState(ACodec *codec)
    : BaseState(codec) {
}

void ACodec::LoadedToIdleState::stateEntered() {
    LOGV("[%s] Now Loaded->Idle", mCodec->mComponentName.c_str());

    CHECK_EQ(allocateBuffers(), (status_t)OK);
}

status_t ACodec::LoadedToIdleState::allocateBuffers() {
    status_t err = mCodec->allocateBuffersOnPort(kPortIndexInput);

    if (err != OK) {
        return err;
    }

    return mCodec->allocateBuffersOnPort(kPortIndexOutput);
}

bool ACodec::LoadedToIdleState::onMessageReceived(const sp<AMessage> &msg) {
    switch (msg->what()) {
        case kWhatShutdown:
        {
            mCodec->deferMessage(msg);
            return true;
        }

        default:
            return BaseState::onMessageReceived(msg);
    }
}

bool ACodec::LoadedToIdleState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventCmdComplete:
        {
            CHECK_EQ(data1, (OMX_U32)OMX_CommandStateSet);
            CHECK_EQ(data2, (OMX_U32)OMX_StateIdle);

            CHECK_EQ(mCodec->mOMX->sendCommand(
                        mCodec->mNode, OMX_CommandStateSet, OMX_StateExecuting),
                     (status_t)OK);

            mCodec->changeState(mCodec->mIdleToExecutingState);

            return true;
        }

        default:
            return BaseState::onOMXEvent(event, data1, data2);
    }
}

////////////////////////////////////////////////////////////////////////////////

ACodec::IdleToExecutingState::IdleToExecutingState(ACodec *codec)
    : BaseState(codec) {
}

void ACodec::IdleToExecutingState::stateEntered() {
    LOGV("[%s] Now Idle->Executing", mCodec->mComponentName.c_str());
}

bool ACodec::IdleToExecutingState::onMessageReceived(const sp<AMessage> &msg) {
    switch (msg->what()) {
        case kWhatShutdown:
        {
            mCodec->deferMessage(msg);
            return true;
        }

        default:
            return BaseState::onMessageReceived(msg);
    }
}

bool ACodec::IdleToExecutingState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventCmdComplete:
        {
            CHECK_EQ(data1, (OMX_U32)OMX_CommandStateSet);
            CHECK_EQ(data2, (OMX_U32)OMX_StateExecuting);

            mCodec->mExecutingState->resume();
            mCodec->changeState(mCodec->mExecutingState);

            return true;
        }

        default:
            return BaseState::onOMXEvent(event, data1, data2);
    }
}

////////////////////////////////////////////////////////////////////////////////

ACodec::ExecutingState::ExecutingState(ACodec *codec)
    : BaseState(codec),
      mActive(false) {
}

ACodec::BaseState::PortMode ACodec::ExecutingState::getPortMode(
        OMX_U32 portIndex) {
    return RESUBMIT_BUFFERS;
}

void ACodec::ExecutingState::submitOutputBuffers() {
    for (size_t i = 0; i < mCodec->mBuffers[kPortIndexOutput].size(); ++i) {
        BufferInfo *info = &mCodec->mBuffers[kPortIndexOutput].editItemAt(i);

        if (mCodec->mNativeWindow != NULL) {
            CHECK(info->mStatus == BufferInfo::OWNED_BY_US
                    || info->mStatus == BufferInfo::OWNED_BY_NATIVE_WINDOW);

            if (info->mStatus == BufferInfo::OWNED_BY_NATIVE_WINDOW) {
                continue;
            }

            status_t err = mCodec->mNativeWindow->lockBuffer(
                    mCodec->mNativeWindow.get(),
                    info->mGraphicBuffer.get());
            CHECK_EQ(err, (status_t)OK);
        } else {
            CHECK_EQ((int)info->mStatus, (int)BufferInfo::OWNED_BY_US);
        }

        LOGV("[%s] calling fillBuffer %p",
             mCodec->mComponentName.c_str(), info->mBufferID);

        CHECK_EQ(mCodec->mOMX->fillBuffer(mCodec->mNode, info->mBufferID),
                 (status_t)OK);

        info->mStatus = BufferInfo::OWNED_BY_COMPONENT;
    }
}

void ACodec::ExecutingState::resume() {
    if (mActive) {
        LOGV("[%s] We're already active, no need to resume.",
             mCodec->mComponentName.c_str());

        return;
    }

    submitOutputBuffers();

    // Post the first input buffer.
    CHECK_GT(mCodec->mBuffers[kPortIndexInput].size(), 0u);
    BufferInfo *info = &mCodec->mBuffers[kPortIndexInput].editItemAt(0);

    postFillThisBuffer(info);

    mActive = true;
}

void ACodec::ExecutingState::stateEntered() {
    LOGV("[%s] Now Executing", mCodec->mComponentName.c_str());

    mCodec->processDeferredMessages();
}

bool ACodec::ExecutingState::onMessageReceived(const sp<AMessage> &msg) {
    bool handled = false;

    switch (msg->what()) {
        case kWhatShutdown:
        {
            mActive = false;

            CHECK_EQ(mCodec->mOMX->sendCommand(
                        mCodec->mNode, OMX_CommandStateSet, OMX_StateIdle),
                     (status_t)OK);

            mCodec->changeState(mCodec->mExecutingToIdleState);

            handled = true;
            break;
        }

        case kWhatFlush:
        {
            mActive = false;

            CHECK_EQ(mCodec->mOMX->sendCommand(
                        mCodec->mNode, OMX_CommandFlush, OMX_ALL),
                     (status_t)OK);

            mCodec->changeState(mCodec->mFlushingState);

            handled = true;
            break;
        }

        case kWhatResume:
        {
            resume();

            handled = true;
            break;
        }

        default:
            handled = BaseState::onMessageReceived(msg);
            break;
    }

    return handled;
}

bool ACodec::ExecutingState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventPortSettingsChanged:
        {
            CHECK_EQ(data1, (OMX_U32)kPortIndexOutput);

            if (data2 == 0 || data2 == OMX_IndexParamPortDefinition) {
                CHECK_EQ(mCodec->mOMX->sendCommand(
                            mCodec->mNode,
                            OMX_CommandPortDisable, kPortIndexOutput),
                         (status_t)OK);

                mCodec->freeOutputBuffersNotOwnedByComponent();

                mCodec->changeState(mCodec->mOutputPortSettingsChangedState);
            } else if (data2 == OMX_IndexConfigCommonOutputCrop) {
                mCodec->mSentFormat = false;
            } else {
                LOGV("[%s] OMX_EventPortSettingsChanged 0x%08lx",
                     mCodec->mComponentName.c_str(), data2);
            }

            return true;
        }

        case OMX_EventBufferFlag:
        {
            return true;
        }

        default:
            return BaseState::onOMXEvent(event, data1, data2);
    }
}

////////////////////////////////////////////////////////////////////////////////

ACodec::OutputPortSettingsChangedState::OutputPortSettingsChangedState(
        ACodec *codec)
    : BaseState(codec) {
}

ACodec::BaseState::PortMode ACodec::OutputPortSettingsChangedState::getPortMode(
        OMX_U32 portIndex) {
    if (portIndex == kPortIndexOutput) {
        return FREE_BUFFERS;
    }

    CHECK_EQ(portIndex, (OMX_U32)kPortIndexInput);

    return RESUBMIT_BUFFERS;
}

bool ACodec::OutputPortSettingsChangedState::onMessageReceived(
        const sp<AMessage> &msg) {
    bool handled = false;

    switch (msg->what()) {
        case kWhatFlush:
        case kWhatShutdown:
        case kWhatResume:
        {
            if (msg->what() == kWhatResume) {
                LOGV("[%s] Deferring resume", mCodec->mComponentName.c_str());
            }

            mCodec->deferMessage(msg);
            handled = true;
            break;
        }

        default:
            handled = BaseState::onMessageReceived(msg);
            break;
    }

    return handled;
}

void ACodec::OutputPortSettingsChangedState::stateEntered() {
    LOGV("[%s] Now handling output port settings change",
         mCodec->mComponentName.c_str());
}

bool ACodec::OutputPortSettingsChangedState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventCmdComplete:
        {
            if (data1 == (OMX_U32)OMX_CommandPortDisable) {
                CHECK_EQ(data2, (OMX_U32)kPortIndexOutput);

                LOGV("[%s] Output port now disabled.",
                        mCodec->mComponentName.c_str());

                CHECK(mCodec->mBuffers[kPortIndexOutput].isEmpty());
                mCodec->mDealer[kPortIndexOutput].clear();

                CHECK_EQ(mCodec->mOMX->sendCommand(
                            mCodec->mNode, OMX_CommandPortEnable, kPortIndexOutput),
                         (status_t)OK);

                CHECK_EQ(mCodec->allocateBuffersOnPort(kPortIndexOutput),
                         (status_t)OK);

                return true;
            } else if (data1 == (OMX_U32)OMX_CommandPortEnable) {
                CHECK_EQ(data2, (OMX_U32)kPortIndexOutput);

                mCodec->mSentFormat = false;

                LOGV("[%s] Output port now reenabled.",
                        mCodec->mComponentName.c_str());

                if (mCodec->mExecutingState->active()) {
                    mCodec->mExecutingState->submitOutputBuffers();
                }

                mCodec->changeState(mCodec->mExecutingState);

                return true;
            }

            return false;
        }

        default:
            return false;
    }
}

////////////////////////////////////////////////////////////////////////////////

ACodec::ExecutingToIdleState::ExecutingToIdleState(ACodec *codec)
    : BaseState(codec) {
}

bool ACodec::ExecutingToIdleState::onMessageReceived(const sp<AMessage> &msg) {
    bool handled = false;

    switch (msg->what()) {
        case kWhatFlush:
        {
            // Don't send me a flush request if you previously wanted me
            // to shutdown.
            TRESPASS();
            break;
        }

        case kWhatShutdown:
        {
            // We're already doing that...

            handled = true;
            break;
        }

        default:
            handled = BaseState::onMessageReceived(msg);
            break;
    }

    return handled;
}

void ACodec::ExecutingToIdleState::stateEntered() {
    LOGV("[%s] Now Executing->Idle", mCodec->mComponentName.c_str());

    mCodec->mSentFormat = false;
}

bool ACodec::ExecutingToIdleState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventCmdComplete:
        {
            CHECK_EQ(data1, (OMX_U32)OMX_CommandStateSet);
            CHECK_EQ(data2, (OMX_U32)OMX_StateIdle);

            changeStateIfWeOwnAllBuffers();

            return true;
        }

        case OMX_EventPortSettingsChanged:
        case OMX_EventBufferFlag:
        {
            // We're shutting down and don't care about this anymore.
            return true;
        }

        default:
            return BaseState::onOMXEvent(event, data1, data2);
    }
}
void ACodec::ExecutingToIdleState::changeStateIfWeOwnAllBuffers() {
    if (mCodec->allYourBuffersAreBelongToUs()) {
        CHECK_EQ(mCodec->mOMX->sendCommand(
                    mCodec->mNode, OMX_CommandStateSet, OMX_StateLoaded),
                 (status_t)OK);

        CHECK_EQ(mCodec->freeBuffersOnPort(kPortIndexInput), (status_t)OK);
        CHECK_EQ(mCodec->freeBuffersOnPort(kPortIndexOutput), (status_t)OK);

        mCodec->changeState(mCodec->mIdleToLoadedState);
    }
}

void ACodec::ExecutingToIdleState::onInputBufferFilled(
        const sp<AMessage> &msg) {
    BaseState::onInputBufferFilled(msg);

    changeStateIfWeOwnAllBuffers();
}

void ACodec::ExecutingToIdleState::onOutputBufferDrained(
        const sp<AMessage> &msg) {
    BaseState::onOutputBufferDrained(msg);

    changeStateIfWeOwnAllBuffers();
}

////////////////////////////////////////////////////////////////////////////////

ACodec::IdleToLoadedState::IdleToLoadedState(ACodec *codec)
    : BaseState(codec) {
}

bool ACodec::IdleToLoadedState::onMessageReceived(const sp<AMessage> &msg) {
    bool handled = false;

    switch (msg->what()) {
        case kWhatShutdown:
        {
            // We're already doing that...

            handled = true;
            break;
        }

        case kWhatFlush:
        {
            // Don't send me a flush request if you previously wanted me
            // to shutdown.
            TRESPASS();
            break;
        }

        default:
            handled = BaseState::onMessageReceived(msg);
            break;
    }

    return handled;
}

void ACodec::IdleToLoadedState::stateEntered() {
    LOGV("[%s] Now Idle->Loaded", mCodec->mComponentName.c_str());
}

bool ACodec::IdleToLoadedState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventCmdComplete:
        {
            CHECK_EQ(data1, (OMX_U32)OMX_CommandStateSet);
            CHECK_EQ(data2, (OMX_U32)OMX_StateLoaded);

            LOGV("[%s] Now Loaded", mCodec->mComponentName.c_str());

            CHECK_EQ(mCodec->mOMX->freeNode(mCodec->mNode), (status_t)OK);

            mCodec->mNativeWindow.clear();
            mCodec->mNode = NULL;
            mCodec->mOMX.clear();
            mCodec->mComponentName.clear();

            mCodec->changeState(mCodec->mUninitializedState);

            sp<AMessage> notify = mCodec->mNotify->dup();
            notify->setInt32("what", ACodec::kWhatShutdownCompleted);
            notify->post();

            return true;
        }

        default:
            return BaseState::onOMXEvent(event, data1, data2);
    }
}

////////////////////////////////////////////////////////////////////////////////

ACodec::ErrorState::ErrorState(ACodec *codec)
    : BaseState(codec) {
}

bool ACodec::ErrorState::onMessageReceived(const sp<AMessage> &msg) {
    return BaseState::onMessageReceived(msg);
}

void ACodec::ErrorState::stateEntered() {
    LOGV("[%s] Now in ErrorState", mCodec->mComponentName.c_str());
}

bool ACodec::ErrorState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    LOGV("EVENT(%d, 0x%08lx, 0x%08lx)", event, data1, data2);
    return true;
}

////////////////////////////////////////////////////////////////////////////////

ACodec::FlushingState::FlushingState(ACodec *codec)
    : BaseState(codec) {
}

void ACodec::FlushingState::stateEntered() {
    LOGV("[%s] Now Flushing", mCodec->mComponentName.c_str());

    mFlushComplete[kPortIndexInput] = mFlushComplete[kPortIndexOutput] = false;
}

bool ACodec::FlushingState::onMessageReceived(const sp<AMessage> &msg) {
    bool handled = false;

    switch (msg->what()) {
        case kWhatShutdown:
        {
            mCodec->deferMessage(msg);
            break;
        }

        case kWhatFlush:
        {
            // We're already doing this right now.
            handled = true;
            break;
        }

        default:
            handled = BaseState::onMessageReceived(msg);
            break;
    }

    return handled;
}

bool ACodec::FlushingState::onOMXEvent(
        OMX_EVENTTYPE event, OMX_U32 data1, OMX_U32 data2) {
    switch (event) {
        case OMX_EventCmdComplete:
        {
            CHECK_EQ(data1, (OMX_U32)OMX_CommandFlush);

            if (data2 == kPortIndexInput || data2 == kPortIndexOutput) {
                CHECK(!mFlushComplete[data2]);
                mFlushComplete[data2] = true;
            } else {
                CHECK_EQ(data2, OMX_ALL);
                CHECK(mFlushComplete[kPortIndexInput]);
                CHECK(mFlushComplete[kPortIndexOutput]);

                changeStateIfWeOwnAllBuffers();
            }

            return true;
        }

        case OMX_EventPortSettingsChanged:
        {
            sp<AMessage> msg = new AMessage(kWhatOMXMessage, mCodec->id());
            msg->setInt32("type", omx_message::EVENT);
            msg->setPointer("node", mCodec->mNode);
            msg->setInt32("event", event);
            msg->setInt32("data1", data1);
            msg->setInt32("data2", data2);

            LOGV("[%s] Deferring OMX_EventPortSettingsChanged",
                 mCodec->mComponentName.c_str());

            mCodec->deferMessage(msg);

            return true;
        }

        default:
            return BaseState::onOMXEvent(event, data1, data2);
    }

    return true;
}

void ACodec::FlushingState::onOutputBufferDrained(const sp<AMessage> &msg) {
    BaseState::onOutputBufferDrained(msg);

    changeStateIfWeOwnAllBuffers();
}

void ACodec::FlushingState::onInputBufferFilled(const sp<AMessage> &msg) {
    BaseState::onInputBufferFilled(msg);

    changeStateIfWeOwnAllBuffers();
}

void ACodec::FlushingState::changeStateIfWeOwnAllBuffers() {
    if (mFlushComplete[kPortIndexInput]
            && mFlushComplete[kPortIndexOutput]
            && mCodec->allYourBuffersAreBelongToUs()) {
        sp<AMessage> notify = mCodec->mNotify->dup();
        notify->setInt32("what", ACodec::kWhatFlushCompleted);
        notify->post();

        mCodec->mPortEOS[kPortIndexInput] =
            mCodec->mPortEOS[kPortIndexOutput] = false;

        mCodec->changeState(mCodec->mExecutingState);
    }
}

}  // namespace android