Revert of VideoCapture: add support for GpuMemoryBuffer allocation and lifetime mgmt in VideoCaptureBufferPool

content/browser/renderer_host/media/video_capture_texture_wrapper.cc

Index: content/browser/renderer_host/media/video_capture_texture_wrapper.cc
diff --git a/content/browser/renderer_host/media/video_capture_texture_wrapper.cc b/content/browser/renderer_host/media/video_capture_texture_wrapper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..339596ee1aea90bfae4ee41ddf9ab366470d5538
--- /dev/null
+++ b/content/browser/renderer_host/media/video_capture_texture_wrapper.cc
@@ -0,0 +1,463 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/renderer_host/media/video_capture_texture_wrapper.h"
+
+#include "base/bind.h"
+#include "content/browser/compositor/image_transport_factory.h"
+#include "content/browser/gpu/browser_gpu_channel_host_factory.h"
+#include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
+#include "content/browser/gpu/gpu_data_manager_impl.h"
+#include "content/browser/renderer_host/media/video_capture_controller.h"
+#include "content/common/gpu/client/context_provider_command_buffer.h"
+#include "content/common/gpu/client/gl_helper.h"
+#include "content/common/gpu/client/gpu_channel_host.h"
+#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
+#include "content/common/gpu/gpu_process_launch_causes.h"
+#include "content/public/browser/browser_thread.h"
+#include "gpu/command_buffer/common/mailbox_holder.h"
+#include "media/base/bind_to_current_loop.h"
+#include "media/base/video_capture_types.h"
+#include "media/base/video_frame.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+#include "third_party/libyuv/include/libyuv.h"
+
+namespace content {
+
+namespace {
+
+// VideoCaptureController has at most 3 capture frames in flight.
+const size_t kNumGpuMemoryBuffers = 3;
+
+uint32 VideoPixelFormatToFourCC(media::VideoPixelFormat pixel_format) {
+  switch (pixel_format) {
+    // I420 is needed by Fake and FileVideoCaptureDevice
+    case media::PIXEL_FORMAT_I420:
+      return libyuv::FOURCC_I420;
+    case media::PIXEL_FORMAT_UYVY:
+      return libyuv::FOURCC_UYVY;
+    case media::PIXEL_FORMAT_YUY2:
+      return libyuv::FOURCC_YUY2;
+    case media::PIXEL_FORMAT_MJPEG:
+      return libyuv::FOURCC_MJPG;
+    default:
+      NOTREACHED() << "Bad captured pixel format: "
+          << media::VideoCaptureFormat::PixelFormatToString(pixel_format);
+  }
+  return libyuv::FOURCC_ANY;
+}
+
+// Modelled after GpuProcessTransportFactory::CreateContextCommon().
+scoped_ptr<content::WebGraphicsContext3DCommandBufferImpl> CreateContextCommon(
+    scoped_refptr<content::GpuChannelHost> gpu_channel_host,
+    int surface_id) {
+  if (!content::GpuDataManagerImpl::GetInstance()->
+        CanUseGpuBrowserCompositor()) {
+    DLOG(ERROR) << "No accelerated graphics found. Check chrome://gpu";
+    return scoped_ptr<content::WebGraphicsContext3DCommandBufferImpl>();
+  }
+  blink::WebGraphicsContext3D::Attributes attrs;
+  attrs.shareResources = true;
+  attrs.depth = false;
+  attrs.stencil = false;
+  attrs.antialias = false;
+  attrs.noAutomaticFlushes = true;
+
+  if (!gpu_channel_host.get()) {
+    DLOG(ERROR) << "Failed to establish GPU channel.";
+    return scoped_ptr<content::WebGraphicsContext3DCommandBufferImpl>();
+  }
+  GURL url("chrome://gpu/GpuProcessTransportFactory::CreateCaptureContext");
+  return make_scoped_ptr(
+      new WebGraphicsContext3DCommandBufferImpl(
+          surface_id,
+          url,
+          gpu_channel_host.get(),
+          attrs,
+          true  /* lose_context_when_out_of_memory */,
+          content::WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits(),
+          NULL));
+}
+
+// Modelled after
+// GpuProcessTransportFactory::CreateOffscreenCommandBufferContext().
+scoped_ptr<content::WebGraphicsContext3DCommandBufferImpl>
+CreateOffscreenCommandBufferContext() {
+  content::CauseForGpuLaunch cause = content::CAUSE_FOR_GPU_LAUNCH_CANVAS_2D;
+  scoped_refptr<content::GpuChannelHost> gpu_channel_host(
+      content::BrowserGpuChannelHostFactory::instance()->
+          EstablishGpuChannelSync(cause));
+  DCHECK(gpu_channel_host);
+  return CreateContextCommon(gpu_channel_host, 0);
+}
+
+typedef base::Callback<void(scoped_refptr<ContextProviderCommandBuffer>)>
+    ProcessContextCallback;
+
+void CreateContextOnUIThread(ProcessContextCallback bottom_half) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  bottom_half.Run(ContextProviderCommandBuffer::Create(
+      CreateOffscreenCommandBufferContext(), "Offscreen-CaptureThread"));
+  return;
+}
+
+void ResetLostContextCallback(
+    const scoped_refptr<ContextProviderCommandBuffer>& capture_thread_context) {
+  capture_thread_context->SetLostContextCallback(
+      cc::ContextProvider::LostContextCallback());
+}
+
+}  // anonymous namespace
+
+// Internal ref-counted class to manage a pool of GpuMemoryBuffers. The contents
+// of an incoming captured frame are_copied_ into the first available buffer
+// from the pool and sent to our client ultimately wrapped into a VideoFrame.
+// This VideoFrame creation is balanced by a waiting on the associated
+// |sync_point|. After VideoFrame consumption the inserted ReleaseCallback()
+// will be called, where the GpuMemoryBuffer is recycled.
+//
+// This class jumps between threads due to GPU-related thread limitations, i.e.
+// some objects cannot be accessed from IO Thread, where we are constructed,
+// others need to be constructed on UI Thread. For this reason most of the
+// operations are carried out on Capture Thread (|capture_task_runner_|).
+//
+// TODO(mcasas): ctor |frame_format| is used for early GpuMemoryBuffer pool
+// allocation, but VideoCaptureDevices might provide a different resolution when
+// calling OnIncomingCapturedData(), be that due to driver preferences or to
+// its ResolutionChangePolicy. Make the GpuMemoryBuffer allocated on demand.
+class VideoCaptureTextureWrapper::TextureWrapperDelegate final
+    : public base::RefCountedThreadSafe<TextureWrapperDelegate> {
+ public:
+  TextureWrapperDelegate(
+      const base::WeakPtr<VideoCaptureController>& controller,
+      const scoped_refptr<base::SingleThreadTaskRunner>& capture_task_runner,
+      const media::VideoCaptureFormat& capture_format);
+
+  // Copy-converts the incoming data into a GpuMemoruBuffer backed Texture, and
+  // sends it to |controller_| wrapped in a VideoFrame, with |buffer| as storage
+  // backend.
+  void OnIncomingCapturedData(
+      const scoped_refptr<media::VideoCaptureDevice::Client::Buffer>&
+          texture_buffer,
+      const scoped_refptr<media::VideoCaptureDevice::Client::Buffer>&
+          argb_buffer,
+      const gfx::Size& frame_size,
+      const base::TimeTicks& timestamp);
+
+ private:
+  friend class base::RefCountedThreadSafe<TextureWrapperDelegate>;
+  ~TextureWrapperDelegate();
+
+  // Creates some necessary members in |capture_task_runner_|.
+  void Init(const media::VideoCaptureFormat& capture_format);
+  // Runs the bottom half of the GlHelper creation.
+  void CreateGlHelper(
+      scoped_refptr<ContextProviderCommandBuffer> capture_thread_context);
+
+  // Recycles |memory_buffer|, deletes Image and Texture on VideoFrame release.
+  void ReleaseCallback(GLuint image_id,
+                       GLuint texture_id,
+                       linked_ptr<gfx::GpuMemoryBuffer> memory_buffer,
+                       uint32 sync_point);
+
+  // The Command Buffer lost the GL context, f.i. GPU process crashed. Signal
+  // error to our owner so the capture can be torn down.
+  void LostContextCallback();
+
+  // Prints the error |message| and notifies |controller_| of an error.
+  void OnError(const std::string& message);
+
+  const base::WeakPtr<VideoCaptureController> controller_;
+  const scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_;
+
+  // Command buffer reference, needs to be destroyed when unused. It is created
+  // on UI Thread and bound to Capture Thread. In particular, it cannot be used
+  // from IO Thread.
+  scoped_refptr<ContextProviderCommandBuffer> capture_thread_context_;
+  // Created and used from Capture Thread. Cannot be used from IO Thread.
+  scoped_ptr<GLHelper> gl_helper_;
+
+  // A pool of GpuMemoryBuffers that are used to wrap incoming captured frames;
+  // recycled via ReleaseCallback().
+  std::queue<linked_ptr<gfx::GpuMemoryBuffer>> gpu_memory_buffers_;
+
+  DISALLOW_COPY_AND_ASSIGN(TextureWrapperDelegate);
+};
+
+VideoCaptureTextureWrapper::VideoCaptureTextureWrapper(
+    const base::WeakPtr<VideoCaptureController>& controller,
+    const scoped_refptr<VideoCaptureBufferPool>& buffer_pool,
+    const scoped_refptr<base::SingleThreadTaskRunner>& capture_task_runner,
+    const media::VideoCaptureFormat& capture_format)
+    : VideoCaptureDeviceClient(controller, buffer_pool),
+      wrapper_delegate_(new TextureWrapperDelegate(controller,
+                                                   capture_task_runner,
+                                                   capture_format)),
+      capture_task_runner_(capture_task_runner)  {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+}
+
+VideoCaptureTextureWrapper::~VideoCaptureTextureWrapper() {
+}
+
+void VideoCaptureTextureWrapper::OnIncomingCapturedData(
+    const uint8* data,
+    int length,
+    const media::VideoCaptureFormat& frame_format,
+    int clockwise_rotation,
+    const base::TimeTicks& timestamp) {
+
+  // Reserve a temporary Buffer for conversion to ARGB.
+  scoped_refptr<media::VideoCaptureDevice::Client::Buffer> argb_buffer =
+      ReserveOutputBuffer(media::PIXEL_FORMAT_ARGB, frame_format.frame_size);
+  DVLOG_IF(1, !argb_buffer) << "Couldn't allocate ARGB Buffer";
+  if (!argb_buffer)
+    return;
+
+  DCHECK(argb_buffer->data());
+  // TODO(mcasas): Take |rotation| into acount.
+  int ret = libyuv::ConvertToARGB(data,
+                                  length,
+                                  reinterpret_cast<uint8*>(argb_buffer->data()),
+                                  frame_format.frame_size.width() * 4,
+                                  0,
+                                  0,
+                                  frame_format.frame_size.width(),
+                                  frame_format.frame_size.height(),
+                                  frame_format.frame_size.width(),
+                                  frame_format.frame_size.height(),
+                                  libyuv::kRotate0,
+                                  VideoPixelFormatToFourCC(
+                                      frame_format.pixel_format));
+  DLOG_IF(ERROR, ret != 0) << "Error converting incoming frame";
+  if (ret != 0)
+    return;
+
+  // Reserve output buffer for the texture on the IPC borderlands.
+  scoped_refptr<media::VideoCaptureDevice::Client::Buffer> texture_buffer =
+      ReserveOutputBuffer(media::PIXEL_FORMAT_TEXTURE, frame_format.frame_size);
+  DVLOG_IF(1, !texture_buffer) << "Couldn't allocate Texture Buffer";
+  if (!texture_buffer)
+    return;
+
+  capture_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(
+          &TextureWrapperDelegate::OnIncomingCapturedData,
+          wrapper_delegate_,
+          texture_buffer,
+          argb_buffer,
+          frame_format.frame_size,
+          timestamp));
+}
+
+VideoCaptureTextureWrapper::TextureWrapperDelegate::TextureWrapperDelegate(
+    const base::WeakPtr<VideoCaptureController>& controller,
+    const scoped_refptr<base::SingleThreadTaskRunner>& capture_task_runner,
+    const media::VideoCaptureFormat& capture_format)
+  : controller_(controller),
+    capture_task_runner_(capture_task_runner) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  capture_task_runner_->PostTask(FROM_HERE,
+      base::Bind(&TextureWrapperDelegate::Init, this, capture_format));
+}
+
+void VideoCaptureTextureWrapper::TextureWrapperDelegate::OnIncomingCapturedData(
+    const scoped_refptr<media::VideoCaptureDevice::Client::Buffer>&
+        texture_buffer,
+    const scoped_refptr<media::VideoCaptureDevice::Client::Buffer>& argb_buffer,
+    const gfx::Size& frame_size,
+    const base::TimeTicks& timestamp) {
+  DCHECK(capture_task_runner_->BelongsToCurrentThread());
+
+  DVLOG_IF(1, !gl_helper_) << " Skipping ingress frame, no GL context.";
+  if (!gl_helper_)
+    return;
+
+  DVLOG_IF(1, gpu_memory_buffers_.empty()) << " Skipping ingress frame, 0 GMBs";
+  if (gpu_memory_buffers_.empty())
+    return;
+
+  linked_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer =
+      gpu_memory_buffers_.front();
+  gpu_memory_buffers_.pop();
+  DCHECK(gpu_memory_buffer.get());
+
+  void* data = NULL;
+  bool rv = gpu_memory_buffer->Map(&data);
+  DCHECK(rv);
+  int stride;
+  gpu_memory_buffer->GetStride(&stride);
+
+  uint8* mapped_buffer = static_cast<uint8*>(data);
+  DCHECK(mapped_buffer);
+  libyuv::ARGBCopy(
+      reinterpret_cast<uint8*>(argb_buffer->data()), frame_size.width() * 4,
+      mapped_buffer, stride,
+      frame_size.width(), frame_size.height());
+  gpu_memory_buffer->Unmap();
+
+  gpu::gles2::GLES2Interface* gl = capture_thread_context_->ContextGL();
+  GLuint image_id = gl->CreateImageCHROMIUM(gpu_memory_buffer->AsClientBuffer(),
+                                            frame_size.width(),
+                                            frame_size.height(), GL_BGRA_EXT);
+  DCHECK(image_id);
+
+  GLuint texture_id = gl_helper_->CreateTexture();
+  DCHECK(texture_id);
+  {
+    content::ScopedTextureBinder<GL_TEXTURE_2D> texture_binder(gl, texture_id);
+    gl->BindTexImage2DCHROMIUM(GL_TEXTURE_2D, image_id);
+  }
+
+  scoped_ptr<gpu::MailboxHolder> mailbox_holder(new gpu::MailboxHolder(
+      gl_helper_->ProduceMailboxHolderFromTexture(texture_id)));
+  DCHECK(!mailbox_holder->mailbox.IsZero());
+  DCHECK(mailbox_holder->mailbox.Verify());
+  DCHECK(mailbox_holder->texture_target);
+  DCHECK(mailbox_holder->sync_point);
+
+  scoped_refptr<media::VideoFrame> video_frame =
+      media::VideoFrame::WrapNativeTexture(
+          mailbox_holder.Pass(),
+          media::BindToCurrentLoop(
+              base::Bind(&VideoCaptureTextureWrapper::TextureWrapperDelegate::
+                             ReleaseCallback,
+                         this, image_id, texture_id, gpu_memory_buffer)),
+          frame_size,
+          gfx::Rect(frame_size),
+          frame_size,
+          base::TimeDelta(),
+          true /* allow_overlay */);
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(
+          &VideoCaptureController::DoIncomingCapturedVideoFrameOnIOThread,
+          controller_, texture_buffer, video_frame, timestamp));
+}
+
+VideoCaptureTextureWrapper::TextureWrapperDelegate::~TextureWrapperDelegate() {
+  // Might not be running on capture_task_runner_'s thread. Ensure owned objects
+  // are destroyed on the correct threads.
+  while (!gpu_memory_buffers_.empty()) {
+    capture_task_runner_->DeleteSoon(FROM_HERE,
+                                     gpu_memory_buffers_.front().release());
+    gpu_memory_buffers_.pop();
+  }
+  if (gl_helper_)
+    capture_task_runner_->DeleteSoon(FROM_HERE, gl_helper_.release());
+
+  if (capture_thread_context_) {
+    capture_task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(&ResetLostContextCallback, capture_thread_context_));
+    capture_thread_context_->AddRef();
+    ContextProviderCommandBuffer* raw_capture_thread_context =
+        capture_thread_context_.get();
+    capture_thread_context_ = nullptr;
+    capture_task_runner_->ReleaseSoon(FROM_HERE, raw_capture_thread_context);
+  }
+}
+
+void VideoCaptureTextureWrapper::TextureWrapperDelegate::Init(
+    const media::VideoCaptureFormat& capture_format) {
+  DCHECK(capture_task_runner_->BelongsToCurrentThread());
+
+  // BrowserGpuMemoryBufferManager::current() may not be accessed on IO Thread.
+  // TODO(mcasas): At this point |frame_format| represents the format we want to
+  // get from the VCDevice, but this might send another format.
+  for (size_t i = 0; i < kNumGpuMemoryBuffers; ++i) {
+    linked_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer(
+        BrowserGpuMemoryBufferManager::current()->AllocateGpuMemoryBuffer(
+            capture_format.frame_size,
+            gfx::GpuMemoryBuffer::BGRA_8888,
+            gfx::GpuMemoryBuffer::MAP).release());
+    if (!gpu_memory_buffer.get()) {
+      OnError("Could not allocate GpuMemoryBuffer");
+      while(!gpu_memory_buffers_.empty())
+        gpu_memory_buffers_.pop();
+      return;
+    }
+    gpu_memory_buffers_.push(gpu_memory_buffer);
+  }
+
+  // In threaded compositing mode, we have to create our own context for Capture
+  // to avoid using the GPU command queue from multiple threads. Context
+  // creation must happen on UI thread; then the context needs to be bound to
+  // the appropriate thread, which is done in CreateGlHelper().
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&CreateContextOnUIThread,
+                 media::BindToCurrentLoop(
+                     base::Bind(&VideoCaptureTextureWrapper::
+                                    TextureWrapperDelegate::CreateGlHelper,
+                                this))));
+}
+
+void VideoCaptureTextureWrapper::TextureWrapperDelegate::CreateGlHelper(
+    scoped_refptr<ContextProviderCommandBuffer> capture_thread_context) {
+  DCHECK(capture_task_runner_->BelongsToCurrentThread());
+
+  if (!capture_thread_context.get()) {
+    DLOG(ERROR) << "No offscreen GL Context!";
+    return;
+  }
+  // This may not happen in IO Thread. The destructor resets the context lost
+  // callback, so base::Unretained is safe; otherwise it'd be a circular ref
+  // counted dependency.
+  capture_thread_context->SetLostContextCallback(media::BindToCurrentLoop(
+      base::Bind(
+          &VideoCaptureTextureWrapper::TextureWrapperDelegate::
+              LostContextCallback,
+          base::Unretained(this))));
+  if (!capture_thread_context->BindToCurrentThread()) {
+    capture_thread_context = NULL;
+    DLOG(ERROR) << "Couldn't bind the Capture Context to the Capture Thread.";
+    return;
+  }
+  DCHECK(capture_thread_context);
+  capture_thread_context_ = capture_thread_context;
+
+  // At this point, |capture_thread_context| is a cc::ContextProvider. Creation
+  // of our GLHelper should happen on Capture Thread.
+  gl_helper_.reset(new GLHelper(capture_thread_context->ContextGL(),
+                                capture_thread_context->ContextSupport()));
+  DCHECK(gl_helper_);
+}
+
+void VideoCaptureTextureWrapper::TextureWrapperDelegate::ReleaseCallback(
+    GLuint image_id,
+    GLuint texture_id,
+    linked_ptr<gfx::GpuMemoryBuffer> memory_buffer,
+    uint32 sync_point) {
+  DCHECK(capture_task_runner_->BelongsToCurrentThread());
+
+  // TODO(mcasas): Before recycling |memory_buffer| we have to make sure it has
+  // been consumed and fully used.
+  gpu_memory_buffers_.push(memory_buffer);
+
+  if (gl_helper_) {
+    gl_helper_->DeleteTexture(texture_id);
+    capture_thread_context_->ContextGL()->DestroyImageCHROMIUM(image_id);
+  }
+}
+
+void VideoCaptureTextureWrapper::TextureWrapperDelegate::LostContextCallback() {
+  DCHECK(capture_task_runner_->BelongsToCurrentThread());
+  // Prevent incoming frames from being processed while OnError gets groked.
+  gl_helper_.reset();
+  OnError("GLContext lost");
+}
+
+void VideoCaptureTextureWrapper::TextureWrapperDelegate::OnError(
+    const std::string& message) {
+  DCHECK(capture_task_runner_->BelongsToCurrentThread());
+  DLOG(ERROR) << message;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&VideoCaptureController::DoErrorOnIOThread, controller_));
+}
+
+}  // namespace content