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/*
* Copyright (c) 2012 The WebRTC 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 in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/video_engine/vie_render_manager.h"
#include "webrtc/engine_configurations.h"
#include "webrtc/modules/video_render/include/video_render.h"
#include "webrtc/modules/video_render/include/video_render_defines.h"
#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
#include "webrtc/system_wrappers/interface/rw_lock_wrapper.h"
#include "webrtc/system_wrappers/interface/logging.h"
#include "webrtc/video_engine/vie_defines.h"
#include "webrtc/video_engine/vie_renderer.h"
namespace webrtc {
ViERenderManagerScoped::ViERenderManagerScoped(
const ViERenderManager& vie_render_manager)
: ViEManagerScopedBase(vie_render_manager) {
}
ViERenderer* ViERenderManagerScoped::Renderer(int32_t render_id) const {
return static_cast<const ViERenderManager*>(vie_manager_)->ViERenderPtr(
render_id);
}
ViERenderManager::ViERenderManager(int32_t engine_id)
: list_cs_(CriticalSectionWrapper::CreateCriticalSection()),
engine_id_(engine_id),
use_external_render_module_(false) {
}
ViERenderManager::~ViERenderManager() {
for (RendererMap::iterator it = stream_to_vie_renderer_.begin();
it != stream_to_vie_renderer_.end();
++it) {
// The renderer is deleted in RemoveRenderStream.
RemoveRenderStream(it->first);
}
}
int32_t ViERenderManager::RegisterVideoRenderModule(
VideoRender* render_module) {
// See if there is already a render module registered for the window that
// the registrant render module is associated with.
VideoRender* current_module = FindRenderModule(render_module->Window());
if (current_module) {
LOG_F(LS_ERROR) << "A render module is already registered for this window.";
return -1;
}
// Register module.
render_list_.push_back(render_module);
use_external_render_module_ = true;
return 0;
}
int32_t ViERenderManager::DeRegisterVideoRenderModule(
VideoRender* render_module) {
// Check if there are streams in the module.
uint32_t n_streams = render_module->GetNumIncomingRenderStreams();
if (n_streams != 0) {
LOG(LS_ERROR) << "There are still " << n_streams
<< "in this module, cannot de-register.";
return -1;
}
for (RenderList::iterator iter = render_list_.begin();
iter != render_list_.end(); ++iter) {
if (render_module == *iter) {
// We've found our renderer. Erase the render module from the map.
render_list_.erase(iter);
return 0;
}
}
LOG(LS_ERROR) << "Module not registered.";
return -1;
}
ViERenderer* ViERenderManager::AddRenderStream(const int32_t render_id,
void* window,
const uint32_t z_order,
const float left,
const float top,
const float right,
const float bottom) {
CriticalSectionScoped cs(list_cs_.get());
if (stream_to_vie_renderer_.find(render_id) !=
stream_to_vie_renderer_.end()) {
LOG(LS_ERROR) << "Render stream already exists";
return NULL;
}
// Get the render module for this window.
VideoRender* render_module = FindRenderModule(window);
if (render_module == NULL) {
// No render module for this window, create a new one.
render_module = VideoRender::CreateVideoRender(ViEModuleId(engine_id_, -1),
window, false);
if (!render_module)
return NULL;
render_list_.push_back(render_module);
}
ViERenderer* vie_renderer = ViERenderer::CreateViERenderer(render_id,
engine_id_,
*render_module,
*this, z_order,
left, top, right,
bottom);
if (!vie_renderer)
return NULL;
stream_to_vie_renderer_[render_id] = vie_renderer;
return vie_renderer;
}
int32_t ViERenderManager::RemoveRenderStream(
const int32_t render_id) {
// We need exclusive right to the items in the render manager to delete a
// stream.
ViEManagerWriteScoped scope(this);
CriticalSectionScoped cs(list_cs_.get());
RendererMap::iterator it = stream_to_vie_renderer_.find(render_id);
if (it == stream_to_vie_renderer_.end()) {
LOG(LS_ERROR) << "No renderer found for render_id: " << render_id;
return 0;
}
// Get the render module pointer for this vie_render object.
VideoRender& renderer = it->second->RenderModule();
// Delete the vie_render.
// This deletes the stream in the render module.
delete it->second;
// Remove from the stream map.
stream_to_vie_renderer_.erase(it);
// Check if there are other streams in the module.
if (!use_external_render_module_ &&
renderer.GetNumIncomingRenderStreams() == 0) {
// Erase the render module from the map.
for (RenderList::iterator iter = render_list_.begin();
iter != render_list_.end(); ++iter) {
if (&renderer == *iter) {
// We've found our renderer.
render_list_.erase(iter);
break;
}
}
// Destroy the module.
VideoRender::DestroyVideoRender(&renderer);
}
return 0;
}
VideoRender* ViERenderManager::FindRenderModule(void* window) {
for (RenderList::iterator iter = render_list_.begin();
iter != render_list_.end(); ++iter) {
if ((*iter)->Window() == window) {
// We've found the render module.
return *iter;
}
}
return NULL;
}
ViERenderer* ViERenderManager::ViERenderPtr(int32_t render_id) const {
RendererMap::const_iterator it = stream_to_vie_renderer_.find(render_id);
if (it == stream_to_vie_renderer_.end())
return NULL;
return it->second;
}
} // namespace webrtc
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