Support multiple video decoders and encoders

content/common/gpu/media/gpu_video_decode_accelerator.cc

 // Copyright (c) 2012 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/common/gpu/media/gpu_video_decode_accelerator.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 14 matching lines @@
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #include "content/common/gpu/media/dxva_video_decode_accelerator.h"
 #elif defined(OS_MACOSX)
 #include "content/common/gpu/media/vt_video_decode_accelerator.h"
 #elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL) && defined(USE_X11)
 #include "content/common/gpu/media/v4l2_video_decode_accelerator.h"
 #include "content/common/gpu/media/v4l2_video_device.h"
 #elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
+#include "content/common/gpu/media/v4l2_video_decode_accelerator.h"
+#include "content/common/gpu/media/v4l2_video_device.h"
 #include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #include "ui/gl/gl_context_glx.h"
 #include "ui/gl/gl_implementation.h"
 #elif defined(USE_OZONE)
 #include "media/ozone/media_ozone_platform.h"
 #elif defined(OS_ANDROID)
 #include "content/common/gpu/media/android_video_decode_accelerator.h"
 #endif
 
 #include "ui/gfx/size.h"
@@ skipping 184 matching lines @@
     const media::VideoCodecProfile profile,
     IPC::Message* init_done_msg) {
   DCHECK(!video_decode_accelerator_.get());
 
   if (!stub_->channel()->AddRoute(host_route_id_, this)) {
     DLOG(ERROR) << "GpuVideoDecodeAccelerator::Initialize(): "
                    "failed to add route";
     SendCreateDecoderReply(init_done_msg, false);
   }
 
+  scoped_ptr<media::VideoDecodeAccelerator> decoders[2];
+  size_t n_decoders = 0;
+
 #if !defined(OS_WIN)
   // Ensure we will be able to get a GL context at all before initializing
   // non-Windows VDAs.
   if (!make_context_current_.Run()) {
     SendCreateDecoderReply(init_done_msg, false);
     return;
   }
 #endif
 
 #if defined(OS_WIN)
   if (base::win::GetVersion() < base::win::VERSION_WIN7) {
     NOTIMPLEMENTED() << "HW video decode acceleration not available.";
     SendCreateDecoderReply(init_done_msg, false);
     return;
   }
   DVLOG(0) << "Initializing DXVA HW decoder for windows.";
-  video_decode_accelerator_.reset(
+  decoders[n_decoders++].reset(
       new DXVAVideoDecodeAccelerator(make_context_current_));
 #elif defined(OS_MACOSX)
-  video_decode_accelerator_.reset(new VTVideoDecodeAccelerator(
+  decoders[n_decoders++].reset(new VTVideoDecodeAccelerator(
       static_cast<CGLContextObj>(
           stub_->decoder()->GetGLContext()->GetHandle()),
       make_context_current_));
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL) && defined(USE_X11)
+#elif defined(OS_CHROMEOS) && defined(USE_X11) && \
+      (defined(ARCH_CPU_X86_FAMILY) || defined(ARCH_CPU_ARMEL))
   scoped_ptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kDecoder);
-  if (!device.get()) {
-    SendCreateDecoderReply(init_done_msg, false);
-    return;
+  if (device.get()) {
+    decoders[n_decoders++].reset(new V4L2VideoDecodeAccelerator(
+        gfx::GLSurfaceEGL::GetHardwareDisplay(),
+        stub_->decoder()->GetGLContext()->GetHandle(),
+        weak_factory_for_io_.GetWeakPtr(),
+        make_context_current_,
+        device.Pass(),
+        io_message_loop_));
   }
-  video_decode_accelerator_.reset(new V4L2VideoDecodeAccelerator(
-      gfx::GLSurfaceEGL::GetHardwareDisplay(),
-      stub_->decoder()->GetGLContext()->GetHandle(),
-      weak_factory_for_io_.GetWeakPtr(),
-      make_context_current_,
-      device.Pass(),
-      io_message_loop_));
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
+#if defined(ARCH_CPU_X86_FAMILY)
+  // x86 CrOS platforms may have multiple decoders.
   if (gfx::GetGLImplementation() != gfx::kGLImplementationDesktopGL) {
     VLOG(1) << "HW video decode acceleration not available without "
                "DesktopGL (GLX).";
     SendCreateDecoderReply(init_done_msg, false);
     return;
   }
   gfx::GLContextGLX* glx_context =
       static_cast<gfx::GLContextGLX*>(stub_->decoder()->GetGLContext());
-  video_decode_accelerator_.reset(new VaapiVideoDecodeAccelerator(
+  decoders[n_decoders++].reset(new VaapiVideoDecodeAccelerator(
       glx_context->display(), make_context_current_));
+#endif
 #elif defined(USE_OZONE)
   media::MediaOzonePlatform* platform =
       media::MediaOzonePlatform::GetInstance();
-  video_decode_accelerator_.reset(platform->CreateVideoDecodeAccelerator(
+  decoders[n_decoders++].reset(platform->CreateVideoDecodeAccelerator(
       make_context_current_));
-  if (!video_decode_accelerator_) {
-    SendCreateDecoderReply(init_done_msg, false);
-    return;
-  }
 #elif defined(OS_ANDROID)
-  video_decode_accelerator_.reset(new AndroidVideoDecodeAccelerator(
+  decoders[n_decoders++].reset(new AndroidVideoDecodeAccelerator(
       stub_->decoder()->AsWeakPtr(),
       make_context_current_));
 #else
   NOTIMPLEMENTED() << "HW video decode acceleration not available.";
   SendCreateDecoderReply(init_done_msg, false);
   return;
 #endif
 
+  for (size_t i = 0; i < n_decoders; ++i) {
+    if (!decoders[i])
+      continue;
+    video_decode_accelerator_ = decoders[i].Pass();
+    if (InitializeDecoder(profile)) {
+      SendCreateDecoderReply(init_done_msg, true);
+      return;
+    }
+  }
+
+  SendCreateDecoderReply(init_done_msg, false);
+}
+
+bool GpuVideoDecodeAccelerator::InitializeDecoder(
+    media::VideoCodecProfile profile) {
+  if (!video_decode_accelerator_.get() ||
+      !video_decode_accelerator_->Initialize(profile, this))
+    return false;
+
   if (video_decode_accelerator_->CanDecodeOnIOThread()) {
     filter_ = new MessageFilter(this, host_route_id_);
     stub_->channel()->AddFilter(filter_.get());
   }
-
-  if (!video_decode_accelerator_->Initialize(profile, this)) {
-    SendCreateDecoderReply(init_done_msg, false);
-    return;
-  }
-
-  SendCreateDecoderReply(init_done_msg, true);
+  return true;
 }
 
 // Runs on IO thread if video_decode_accelerator_->CanDecodeOnIOThread() is
 // true, otherwise on the main thread.
 void GpuVideoDecodeAccelerator::OnDecode(
     base::SharedMemoryHandle handle, int32 id, uint32 size) {
   DCHECK(video_decode_accelerator_.get());
   if (id < 0) {
     DLOG(ERROR) << "BitstreamBuffer id " << id << " out of range";
     if (child_message_loop_->BelongsToCurrentThread()) {
@@ skipping 188 matching lines @@
   return stub_->channel()->Send(message);
 }
 
 void GpuVideoDecodeAccelerator::SendCreateDecoderReply(IPC::Message* message,
                                                        bool succeeded) {
   GpuCommandBufferMsg_CreateVideoDecoder::WriteReplyParams(message, succeeded);
   Send(message);
 }
 
 }  // namespace content