Reland of Delete video_render module.

webrtc/modules/video_render/ios/video_render_ios_gles20.mm

-/*
- *  Copyright (c) 2013 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.
- */
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-#include "webrtc/modules/video_render/ios/video_render_ios_gles20.h"
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
-#include "webrtc/system_wrappers/include/event_wrapper.h"
-
-using namespace webrtc;
-
-VideoRenderIosGles20::VideoRenderIosGles20(VideoRenderIosView* view,
-                                           bool full_screen,
-                                           int render_id)
-    : gles_crit_sec_(CriticalSectionWrapper::CreateCriticalSection()),
-      screen_update_event_(0),
-      view_(view),
-      window_rect_(),
-      window_width_(0),
-      window_height_(0),
-      is_full_screen_(full_screen),
-      agl_channels_(),
-      z_order_to_channel_(),
-      gles_context_([view context]),
-      is_rendering_(true) {
-  screen_update_thread_.reset(new rtc::PlatformThread(
-      ScreenUpdateThreadProc, this, "ScreenUpdateGles20"));
-  screen_update_event_ = EventTimerWrapper::Create();
-  GetWindowRect(window_rect_);
-}
-
-VideoRenderIosGles20::~VideoRenderIosGles20() {
-  // Signal event to exit thread, then delete it
-  rtc::PlatformThread* thread_wrapper = screen_update_thread_.release();
-
-  if (thread_wrapper) {
-    screen_update_event_->Set();
-    screen_update_event_->StopTimer();
-
-    thread_wrapper->Stop();
-    delete thread_wrapper;
-    delete screen_update_event_;
-    screen_update_event_ = NULL;
-    is_rendering_ = FALSE;
-  }
-
-  // Delete all channels
-  std::map<int, VideoRenderIosChannel*>::iterator it = agl_channels_.begin();
-  while (it != agl_channels_.end()) {
-    delete it->second;
-    agl_channels_.erase(it);
-    it = agl_channels_.begin();
-  }
-  agl_channels_.clear();
-
-  // Clean the zOrder map
-  std::multimap<int, int>::iterator z_it = z_order_to_channel_.begin();
-  while (z_it != z_order_to_channel_.end()) {
-    z_order_to_channel_.erase(z_it);
-    z_it = z_order_to_channel_.begin();
-  }
-  z_order_to_channel_.clear();
-}
-
-int VideoRenderIosGles20::Init() {
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  if (!view_) {
-    view_ = [[VideoRenderIosView alloc] init];
-  }
-
-  if (![view_ createContext]) {
-    return -1;
-  }
-
-  screen_update_thread_->Start();
-  screen_update_thread_->SetPriority(rtc::kRealtimePriority);
-
-  // Start the event triggering the render process
-  unsigned int monitor_freq = 60;
-  screen_update_event_->StartTimer(true, 1000 / monitor_freq);
-
-  window_width_ = window_rect_.right - window_rect_.left;
-  window_height_ = window_rect_.bottom - window_rect_.top;
-
-  return 0;
-}
-
-VideoRenderIosChannel* VideoRenderIosGles20::CreateEaglChannel(int channel,
-                                                               int z_order,
-                                                               float left,
-                                                               float top,
-                                                               float right,
-                                                               float bottom) {
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  if (HasChannel(channel)) {
-    return NULL;
-  }
-
-  VideoRenderIosChannel* new_eagl_channel = new VideoRenderIosChannel(view_);
-
-  if (new_eagl_channel->SetStreamSettings(z_order, left, top, right, bottom) ==
-      -1) {
-    return NULL;
-  }
-
-  agl_channels_[channel] = new_eagl_channel;
-  z_order_to_channel_.insert(std::pair<int, int>(z_order, channel));
-
-  return new_eagl_channel;
-}
-
-int VideoRenderIosGles20::DeleteEaglChannel(int channel) {
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  std::map<int, VideoRenderIosChannel*>::iterator it;
-  it = agl_channels_.find(channel);
-  if (it != agl_channels_.end()) {
-    delete it->second;
-    agl_channels_.erase(it);
-  } else {
-    return -1;
-  }
-
-  std::multimap<int, int>::iterator z_it = z_order_to_channel_.begin();
-  while (z_it != z_order_to_channel_.end()) {
-    if (z_it->second == channel) {
-      z_order_to_channel_.erase(z_it);
-      break;
-    }
-    z_it++;
-  }
-
-  return 0;
-}
-
-bool VideoRenderIosGles20::HasChannel(int channel) {
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  std::map<int, VideoRenderIosChannel*>::iterator it =
-      agl_channels_.find(channel);
-
-  if (it != agl_channels_.end()) {
-    return true;
-  }
-
-  return false;
-}
-
-// Rendering process
-bool VideoRenderIosGles20::ScreenUpdateThreadProc(void* obj) {
-  return static_cast<VideoRenderIosGles20*>(obj)->ScreenUpdateProcess();
-}
-
-bool VideoRenderIosGles20::ScreenUpdateProcess() {
-  screen_update_event_->Wait(100);
-
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  if (!is_rendering_) {
-    return false;
-  }
-
-  if (!screen_update_thread_) {
-    return false;
-  }
-
-  if (GetWindowRect(window_rect_) == -1) {
-    return true;
-  }
-
-  if (window_width_ != (window_rect_.right - window_rect_.left) ||
-      window_height_ != (window_rect_.bottom - window_rect_.top)) {
-    window_width_ = window_rect_.right - window_rect_.left;
-    window_height_ = window_rect_.bottom - window_rect_.top;
-  }
-
-  // Check if there are any updated buffers
-  bool updated = false;
-
-  std::map<int, VideoRenderIosChannel*>::iterator it = agl_channels_.begin();
-  while (it != agl_channels_.end()) {
-    VideoRenderIosChannel* agl_channel = it->second;
-
-    updated = agl_channel->IsUpdated();
-    if (updated) {
-      break;
-    }
-    it++;
-  }
-
-  if (updated) {
-    // At least one buffer has been updated, we need to repaint the texture
-    // Loop through all channels starting highest zOrder ending with lowest.
-    for (std::multimap<int, int>::reverse_iterator r_it =
-             z_order_to_channel_.rbegin();
-         r_it != z_order_to_channel_.rend();
-         r_it++) {
-      int channel_id = r_it->second;
-      std::map<int, VideoRenderIosChannel*>::iterator it =
-          agl_channels_.find(channel_id);
-
-      VideoRenderIosChannel* agl_channel = it->second;
-
-      agl_channel->RenderOffScreenBuffer();
-    }
-
-    [view_ presentFramebuffer];
-  }
-
-  return true;
-}
-
-int VideoRenderIosGles20::GetWindowRect(Rect& rect) {
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  if (!view_) {
-    return -1;
-  }
-
-  CGRect bounds = [view_ bounds];
-  rect.top = bounds.origin.y;
-  rect.left = bounds.origin.x;
-  rect.bottom = bounds.size.height + bounds.origin.y;
-  rect.right = bounds.size.width + bounds.origin.x;
-
-  return 0;
-}
-
-int VideoRenderIosGles20::ChangeWindow(void* new_window) {
-  CriticalSectionScoped cs(gles_crit_sec_.get());
-
-  view_ = (__bridge VideoRenderIosView*)new_window;
-
-  return 0;
-}
-
-int VideoRenderIosGles20::StartRender() {
-  is_rendering_ = true;
-  return 0;
-}
-
-int VideoRenderIosGles20::StopRender() {
-  is_rendering_ = false;
-  return 0;
-}
-
-int VideoRenderIosGles20::GetScreenResolution(uint& screen_width,
-                                              uint& screen_height) {
-  screen_width = [view_ bounds].size.width;
-  screen_height = [view_ bounds].size.height;
-  return 0;
-}
-
-int VideoRenderIosGles20::SetStreamCropping(const uint stream_id,
-                                            const float left,
-                                            const float top,
-                                            const float right,
-                                            const float bottom) {
-  // Check if there are any updated buffers
-  // bool updated = false;
-  uint counter = 0;
-
-  std::map<int, VideoRenderIosChannel*>::iterator it = agl_channels_.begin();
-  while (it != agl_channels_.end()) {
-    if (counter == stream_id) {
-      VideoRenderIosChannel* agl_channel = it->second;
-      agl_channel->SetStreamSettings(0, left, top, right, bottom);
-    }
-    counter++;
-    it++;
-  }
-
-  return 0;
-}