Stream.cpp

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/libANGLE/Stream.cpp

//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// Stream.cpp: Implements the egl::Stream class, representing the stream
// where frames are streamed in. Implements EGLStreanKHR.

#include "libANGLE/Stream.h"

#include <EGL/eglext.h>
#include <platform/Platform.h>

#include "common/debug.h"
#include "common/mathutil.h"
#include "common/platform.h"
#include "common/utilities.h"
#include "libANGLE/Context.h"
#include "libANGLE/Display.h"
#include "libANGLE/renderer/DisplayImpl.h"
#include "libANGLE/renderer/StreamProducerImpl.h"

namespace egl
{

Stream::Stream(Display *display, const AttributeMap &attribs)
    : mLabel(nullptr),
      mDisplay(display),
      mProducerImplementation(nullptr),
      mState(EGL_STREAM_STATE_CREATED_KHR),
      mProducerFrame(0),
      mConsumerFrame(0),
      mConsumerLatency(attribs.getAsInt(EGL_CONSUMER_LATENCY_USEC_KHR, 0)),
      mConsumerAcquireTimeout(attribs.getAsInt(EGL_CONSUMER_ACQUIRE_TIMEOUT_USEC_KHR, 0)),
      mPlaneCount(0),
      mConsumerType(ConsumerType::NoConsumer),
      mProducerType(ProducerType::NoProducer)
{
    for (auto &plane : mPlanes)
    {
        plane.textureUnit = -1;
        plane.texture     = nullptr;
    }
}

Stream::~Stream()
{
    SafeDelete(mProducerImplementation);
    for (auto &plane : mPlanes)
    {
        if (plane.texture != nullptr)
        {
            plane.texture->releaseStream();
        }
    }
}

void Stream::setLabel(EGLLabelKHR label)
{
    mLabel = label;
}

EGLLabelKHR Stream::getLabel() const
{
    return mLabel;
}

void Stream::setConsumerLatency(EGLint latency)
{
    mConsumerLatency = latency;
}

EGLint Stream::getConsumerLatency() const
{
    return mConsumerLatency;
}

EGLuint64KHR Stream::getProducerFrame() const
{
    return mProducerFrame;
}

EGLuint64KHR Stream::getConsumerFrame() const
{
    return mConsumerFrame;
}

EGLenum Stream::getState() const
{
    return mState;
}

void Stream::setConsumerAcquireTimeout(EGLint timeout)
{
    mConsumerAcquireTimeout = timeout;
}

EGLint Stream::getConsumerAcquireTimeout() const
{
    return mConsumerAcquireTimeout;
}

Stream::ProducerType Stream::getProducerType() const
{
    return mProducerType;
}

Stream::ConsumerType Stream::getConsumerType() const
{
    return mConsumerType;
}

EGLint Stream::getPlaneCount() const
{
    return mPlaneCount;
}

rx::StreamProducerImpl *Stream::getImplementation()
{
    return mProducerImplementation;
}

Error Stream::createConsumerGLTextureExternal(const AttributeMap &attributes, gl::Context *context)
{
    ASSERT(mState == EGL_STREAM_STATE_CREATED_KHR);
    ASSERT(mConsumerType == ConsumerType::NoConsumer);
    ASSERT(mProducerType == ProducerType::NoProducer);
    ASSERT(context != nullptr);

    const auto &glState = context->getState();
    EGLenum bufferType  = attributes.getAsInt(EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER);
    if (bufferType == EGL_RGB_BUFFER)
    {
        mPlanes[0].texture = glState.getTargetTexture(gl::TextureType::External);
        ASSERT(mPlanes[0].texture != nullptr);
        mPlanes[0].texture->bindStream(this);
        mConsumerType = ConsumerType::GLTextureRGB;
        mPlaneCount   = 1;
    }
    else
    {
        mPlaneCount = attributes.getAsInt(EGL_YUV_NUMBER_OF_PLANES_EXT, 2);
        ASSERT(mPlaneCount <= 3);
        for (EGLint i = 0; i < mPlaneCount; i++)
        {
            // Fetch all the textures
            mPlanes[i].textureUnit = attributes.getAsInt(EGL_YUV_PLANE0_TEXTURE_UNIT_NV + i, -1);
            if (mPlanes[i].textureUnit != EGL_NONE)
            {
                mPlanes[i].texture =
                    glState.getSamplerTexture(mPlanes[i].textureUnit, gl::TextureType::External);
                ASSERT(mPlanes[i].texture != nullptr);
            }
        }

        // Bind them to the stream
        for (EGLint i = 0; i < mPlaneCount; i++)
        {
            if (mPlanes[i].textureUnit != EGL_NONE)
            {
                mPlanes[i].texture->bindStream(this);
            }
        }
        mConsumerType = ConsumerType::GLTextureYUV;
    }

    mContext = context;
    mState   = EGL_STREAM_STATE_CONNECTING_KHR;

    return NoError();
}

Error Stream::createProducerD3D11Texture(const AttributeMap &attributes)
{
    ASSERT(mState == EGL_STREAM_STATE_CONNECTING_KHR);
    ASSERT(mConsumerType == ConsumerType::GLTextureRGB ||
           mConsumerType == ConsumerType::GLTextureYUV);
    ASSERT(mProducerType == ProducerType::NoProducer);

    mProducerImplementation =
        mDisplay->getImplementation()->createStreamProducerD3DTexture(mConsumerType, attributes);
    mProducerType = ProducerType::D3D11Texture;
    mState        = EGL_STREAM_STATE_EMPTY_KHR;

    return NoError();
}

// Called when the consumer of this stream starts using the stream
Error Stream::consumerAcquire(const gl::Context *context)
{
    ASSERT(mState == EGL_STREAM_STATE_NEW_FRAME_AVAILABLE_KHR ||
           mState == EGL_STREAM_STATE_OLD_FRAME_AVAILABLE_KHR);
    ASSERT(mConsumerType == ConsumerType::GLTextureRGB ||
           mConsumerType == ConsumerType::GLTextureYUV);
    ASSERT(mProducerType == ProducerType::D3D11Texture);

    mState = EGL_STREAM_STATE_OLD_FRAME_AVAILABLE_KHR;
    mConsumerFrame++;

    // Bind the planes to the gl textures
    for (int i = 0; i < mPlaneCount; i++)
    {
        if (mPlanes[i].texture != nullptr)
        {
            ANGLE_TRY(ResultToEGL(mPlanes[i].texture->acquireImageFromStream(
                context, mProducerImplementation->getGLFrameDescription(i))));
        }
    }

    return NoError();
}

Error Stream::consumerRelease(const gl::Context *context)
{
    ASSERT(mState == EGL_STREAM_STATE_NEW_FRAME_AVAILABLE_KHR ||
           mState == EGL_STREAM_STATE_OLD_FRAME_AVAILABLE_KHR);
    ASSERT(mConsumerType == ConsumerType::GLTextureRGB ||
           mConsumerType == ConsumerType::GLTextureYUV);
    ASSERT(mProducerType == ProducerType::D3D11Texture);

    // Release the images
    for (int i = 0; i < mPlaneCount; i++)
    {
        if (mPlanes[i].texture != nullptr)
        {
            ANGLE_TRY(ResultToEGL(mPlanes[i].texture->releaseImageFromStream(context)));
        }
    }

    return NoError();
}

bool Stream::isConsumerBoundToContext(const gl::Context *context) const
{
    ASSERT(context != nullptr);
    return (context == mContext);
}

Error Stream::validateD3D11Texture(void *texture, const AttributeMap &attributes) const
{
    ASSERT(mConsumerType == ConsumerType::GLTextureRGB ||
           mConsumerType == ConsumerType::GLTextureYUV);
    ASSERT(mProducerType == ProducerType::D3D11Texture);
    ASSERT(mProducerImplementation != nullptr);

    return mProducerImplementation->validateD3DTexture(texture, attributes);
}

Error Stream::postD3D11Texture(void *texture, const AttributeMap &attributes)
{
    ASSERT(mConsumerType == ConsumerType::GLTextureRGB ||
           mConsumerType == ConsumerType::GLTextureYUV);
    ASSERT(mProducerType == ProducerType::D3D11Texture);

    mProducerImplementation->postD3DTexture(texture, attributes);
    mProducerFrame++;

    mState = EGL_STREAM_STATE_NEW_FRAME_AVAILABLE_KHR;

    return NoError();
}

// This is called when a texture object associated with this stream is destroyed. Even if multiple
// textures are bound, one being destroyed invalidates the stream, so all the remaining textures
// will be released and the stream will be invalidated.
void Stream::releaseTextures()
{
    for (auto &plane : mPlanes)
    {
        if (plane.texture != nullptr)
        {
            plane.texture->releaseStream();
            plane.texture = nullptr;
        }
    }
    mConsumerType = ConsumerType::NoConsumer;
    mProducerType = ProducerType::NoProducer;
    mState        = EGL_STREAM_STATE_DISCONNECTED_KHR;
}

}  // namespace egl

kc3-lang/angle/src/libANGLE/Stream.cpp

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kc3-lang/angle /src/libANGLE/Stream.cpp