Implement PPAPI VideoDecode out-of-process support

ppapi/shared_impl/video_decoder_impl.cc

+// Copyright (c) 2011 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 "ppapi/shared_impl/video_decoder_impl.h"
+
+#include "base/logging.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/proxy/plugin_resource_tracker.h"
+#include "ppapi/thunk/ppb_context_3d_api.h"
+#include "ppapi/thunk/enter.h"
+
+using ppapi::thunk::PPB_Context3D_API;
+
+namespace ppapi {
+
+VideoDecoderImpl::VideoDecoderImpl()
+    : flush_callback_(PP_MakeCompletionCallback(NULL, NULL)),
+      reset_callback_(PP_MakeCompletionCallback(NULL, NULL)),
+      context3d_id_(0),
+      gles2_impl_(NULL) {
+}
+
+thunk::PPB_VideoDecoder_API* VideoDecoderImpl::AsPPB_VideoDecoder_API() {
+  return this;
+}
+
+VideoDecoderImpl::~VideoDecoderImpl() {
+}
+
+bool VideoDecoderImpl::Init(PP_Resource context3d_id,
+                            PPB_Context3D_API* context3d,
+                            const PP_VideoConfigElement* decoder_config) {
+  if (!context3d || !decoder_config || !context3d_id)
+    return false;
+
+  DCHECK(!gles2_impl_ && !context3d_id_);
+  gles2_impl_ = context3d->GetGLES2Impl();
+  AddRefResource(context3d_id);
+  context3d_id_ = context3d_id;
+  return true;
+}
+
+void VideoDecoderImpl::Destroy() {
+  context3d_id_ = 0;
+  gles2_impl_ = NULL;
+  UnrefResource(context3d_id_);
+}
+
+void VideoDecoderImpl::SetFlushCallback(PP_CompletionCallback callback) {
+  CHECK(callback.func);
+  DCHECK(!flush_callback_.func);
+  flush_callback_ = callback;
+}
+
+void VideoDecoderImpl::SetResetCallback(PP_CompletionCallback callback) {
+  CHECK(callback.func);
+  DCHECK(!reset_callback_.func);
+  reset_callback_ = callback;
+}
+
+void VideoDecoderImpl::SetBitstreamBufferCallback(
+    int32 bitstream_buffer_id, PP_CompletionCallback callback) {
+  CHECK(bitstream_buffer_callbacks_.insert(
+      std::make_pair(bitstream_buffer_id, callback)).second);
+}
+
+void VideoDecoderImpl::RunFlushCallback(int32 result) {
+  DCHECK(flush_callback_.func);
+  PP_RunAndClearCompletionCallback(&flush_callback_, result);
+}
+
+void VideoDecoderImpl::RunResetCallback(int32 result) {
+  DCHECK(reset_callback_.func);
+  PP_RunAndClearCompletionCallback(&reset_callback_, result);
+}
+
+void VideoDecoderImpl::RunBitstreamBufferCallback(
+    int32 bitstream_buffer_id, int32 result) {
+  CallbackById::iterator it =
+      bitstream_buffer_callbacks_.find(bitstream_buffer_id);
+  DCHECK(it != bitstream_buffer_callbacks_.end());
+  PP_CompletionCallback cc = it->second;
+  bitstream_buffer_callbacks_.erase(it);
+  PP_RunCompletionCallback(&cc, PP_OK);
+}
+
+void VideoDecoderImpl::FlushCommandBuffer() {
+  if (gles2_impl_)
+    gles2_impl_->Flush();
+}
+
+bool VideoDecoderImpl::CopyConfigsToVector(
+    const PP_VideoConfigElement* configs_to_copy,
+    std::vector<PP_VideoConfigElement>* out_configs) {
+  // TODO(fischman/vrk): This is still broken. We need to get rid of the silly
+  // PP_VideoConfigElement vector in favor of a struct (see TODO in
+  // ppb_video_decoder_dev.h).
+  const PP_VideoConfigElement* current = configs_to_copy;
+  while (current && *current != PP_VIDEOATTR_DICTIONARY_TERMINATOR) {
+    out_configs->push_back(*current);
+    out_configs->push_back(*(current + 1));
+    current += 2;
+  }
+  return true;
+}
+
+}  // namespace ppapi