Move talk/media to webrtc/media

talk/media/devices/linuxdevicemanager.cc

Index: talk/media/devices/linuxdevicemanager.cc
diff --git a/talk/media/devices/linuxdevicemanager.cc b/talk/media/devices/linuxdevicemanager.cc
deleted file mode 100644
index 25be321c5e580b60019089e37af631c977ac6baf..0000000000000000000000000000000000000000
--- a/talk/media/devices/linuxdevicemanager.cc
+++ /dev/null
@@ -1,410 +0,0 @@
-/*
- * libjingle
- * Copyright 2004 Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *  1. Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *  2. Redistributions in binary form must reproduce the above copyright notice,
- *     this list of conditions and the following disclaimer in the documentation
- *     and/or other materials provided with the distribution.
- *  3. The name of the author may not be used to endorse or promote products
- *     derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "talk/media/devices/linuxdevicemanager.h"
-
-#include <unistd.h>
-#include "talk/media/base/mediacommon.h"
-#include "talk/media/devices/libudevsymboltable.h"
-#include "talk/media/devices/v4llookup.h"
-#include "webrtc/sound/platformsoundsystem.h"
-#include "webrtc/sound/platformsoundsystemfactory.h"
-#include "webrtc/sound/sounddevicelocator.h"
-#include "webrtc/sound/soundsysteminterface.h"
-#include "webrtc/base/fileutils.h"
-#include "webrtc/base/linux.h"
-#include "webrtc/base/logging.h"
-#include "webrtc/base/pathutils.h"
-#include "webrtc/base/physicalsocketserver.h"
-#include "webrtc/base/stream.h"
-#include "webrtc/base/stringutils.h"
-#include "webrtc/base/thread.h"
-
-namespace cricket {
-
-DeviceManagerInterface* DeviceManagerFactory::Create() {
-  return new LinuxDeviceManager();
-}
-
-class LinuxDeviceWatcher
-    : public DeviceWatcher,
-      private rtc::Dispatcher {
- public:
-  explicit LinuxDeviceWatcher(DeviceManagerInterface* dm);
-  virtual ~LinuxDeviceWatcher();
-  virtual bool Start();
-  virtual void Stop();
-
- private:
-  virtual uint32_t GetRequestedEvents();
-  virtual void OnPreEvent(uint32_t ff);
-  virtual void OnEvent(uint32_t ff, int err);
-  virtual int GetDescriptor();
-  virtual bool IsDescriptorClosed();
-
-  DeviceManagerInterface* manager_;
-  LibUDevSymbolTable libudev_;
-  struct udev* udev_;
-  struct udev_monitor* udev_monitor_;
-  bool registered_;
-};
-
-static const char* const kFilteredAudioDevicesName[] = {
-#if defined(CHROMEOS)
-    "surround40:",
-    "surround41:",
-    "surround50:",
-    "surround51:",
-    "surround71:",
-    "iec958:",      // S/PDIF
-#endif
-    NULL,
-};
-static const char* kFilteredVideoDevicesName[] = {
-    NULL,
-};
-
-LinuxDeviceManager::LinuxDeviceManager()
-    : sound_system_(new rtc::PlatformSoundSystemFactory()) {
-  set_watcher(new LinuxDeviceWatcher(this));
-}
-
-LinuxDeviceManager::~LinuxDeviceManager() {
-}
-
-bool LinuxDeviceManager::GetAudioDevices(bool input,
-                                         std::vector<Device>* devs) {
-  devs->clear();
-  if (!sound_system_.get()) {
-    return false;
-  }
-  rtc::SoundSystemInterface::SoundDeviceLocatorList list;
-  bool success;
-  if (input) {
-    success = sound_system_->EnumerateCaptureDevices(&list);
-  } else {
-    success = sound_system_->EnumeratePlaybackDevices(&list);
-  }
-  if (!success) {
-    LOG(LS_ERROR) << "Can't enumerate devices";
-    sound_system_.release();
-    return false;
-  }
-  // We have to start the index at 1 because webrtc VoiceEngine puts the default
-  // device at index 0, but Enumerate(Capture|Playback)Devices does not include
-  // a locator for the default device.
-  int index = 1;
-  for (rtc::SoundSystemInterface::SoundDeviceLocatorList::iterator i = list.begin();
-       i != list.end();
-       ++i, ++index) {
-    devs->push_back(Device((*i)->name(), index));
-  }
-  rtc::SoundSystemInterface::ClearSoundDeviceLocatorList(&list);
-  sound_system_.release();
-  return FilterDevices(devs, kFilteredAudioDevicesName);
-}
-
-static const std::string kVideoMetaPathK2_4("/proc/video/dev/");
-static const std::string kVideoMetaPathK2_6("/sys/class/video4linux/");
-
-enum MetaType { M2_4, M2_6, NONE };
-
-static void ScanDeviceDirectory(const std::string& devdir,
-                                std::vector<Device>* devices) {
-  rtc::scoped_ptr<rtc::DirectoryIterator> directoryIterator(
-      rtc::Filesystem::IterateDirectory());
-
-  if (directoryIterator->Iterate(rtc::Pathname(devdir))) {
-    do {
-      std::string filename = directoryIterator->Name();
-      std::string device_name = devdir + filename;
-      if (!directoryIterator->IsDots()) {
-        if (filename.find("video") == 0 &&
-            V4LLookup::IsV4L2Device(device_name)) {
-          devices->push_back(Device(device_name, device_name));
-        }
-      }
-    } while (directoryIterator->Next());
-  }
-}
-
-static std::string GetVideoDeviceNameK2_6(const std::string& device_meta_path) {
-  std::string device_name;
-
-  rtc::scoped_ptr<rtc::FileStream> device_meta_stream(
-      rtc::Filesystem::OpenFile(device_meta_path, "r"));
-
-  if (device_meta_stream) {
-    if (device_meta_stream->ReadLine(&device_name) != rtc::SR_SUCCESS) {
-      LOG(LS_ERROR) << "Failed to read V4L2 device meta " << device_meta_path;
-    }
-    device_meta_stream->Close();
-  }
-
-  return device_name;
-}
-
-static std::string Trim(const std::string& s, const std::string& drop = " \t") {
-  std::string::size_type first = s.find_first_not_of(drop);
-  std::string::size_type last  = s.find_last_not_of(drop);
-
-  if (first == std::string::npos || last == std::string::npos)
-    return std::string("");
-
-  return s.substr(first, last - first + 1);
-}
-
-static std::string GetVideoDeviceNameK2_4(const std::string& device_meta_path) {
-  rtc::ConfigParser::MapVector all_values;
-
-  rtc::ConfigParser config_parser;
-  rtc::FileStream* file_stream =
-      rtc::Filesystem::OpenFile(device_meta_path, "r");
-
-  if (file_stream == NULL) return "";
-
-  config_parser.Attach(file_stream);
-  config_parser.Parse(&all_values);
-
-  for (rtc::ConfigParser::MapVector::iterator i = all_values.begin();
-      i != all_values.end(); ++i) {
-    rtc::ConfigParser::SimpleMap::iterator device_name_i =
-        i->find("name");
-
-    if (device_name_i != i->end()) {
-      return device_name_i->second;
-    }
-  }
-
-  return "";
-}
-
-static std::string GetVideoDeviceName(MetaType meta,
-    const std::string& device_file_name) {
-  std::string device_meta_path;
-  std::string device_name;
-  std::string meta_file_path;
-
-  if (meta == M2_6) {
-    meta_file_path = kVideoMetaPathK2_6 + device_file_name + "/name";
-
-    LOG(LS_INFO) << "Trying " + meta_file_path;
-    device_name = GetVideoDeviceNameK2_6(meta_file_path);
-
-    if (device_name.empty()) {
-      meta_file_path = kVideoMetaPathK2_6 + device_file_name + "/model";
-
-      LOG(LS_INFO) << "Trying " << meta_file_path;
-      device_name = GetVideoDeviceNameK2_6(meta_file_path);
-    }
-  } else {
-    meta_file_path = kVideoMetaPathK2_4 + device_file_name;
-    LOG(LS_INFO) << "Trying " << meta_file_path;
-    device_name = GetVideoDeviceNameK2_4(meta_file_path);
-  }
-
-  if (device_name.empty()) {
-    device_name = "/dev/" + device_file_name;
-    LOG(LS_ERROR)
-      << "Device name not found, defaulting to device path " << device_name;
-  }
-
-  LOG(LS_INFO) << "Name for " << device_file_name << " is " << device_name;
-
-  return Trim(device_name);
-}
-
-static void ScanV4L2Devices(std::vector<Device>* devices) {
-  LOG(LS_INFO) << ("Enumerating V4L2 devices");
-
-  MetaType meta;
-  std::string metadata_dir;
-
-  rtc::scoped_ptr<rtc::DirectoryIterator> directoryIterator(
-      rtc::Filesystem::IterateDirectory());
-
-  // Try and guess kernel version
-  if (directoryIterator->Iterate(kVideoMetaPathK2_6)) {
-    meta = M2_6;
-    metadata_dir = kVideoMetaPathK2_6;
-  } else if (directoryIterator->Iterate(kVideoMetaPathK2_4)) {
-    meta = M2_4;
-    metadata_dir = kVideoMetaPathK2_4;
-  } else {
-    meta = NONE;
-  }
-
-  if (meta != NONE) {
-    LOG(LS_INFO) << "V4L2 device metadata found at " << metadata_dir;
-
-    do {
-      std::string filename = directoryIterator->Name();
-
-      if (filename.find("video") == 0) {
-        std::string device_path = "/dev/" + filename;
-
-        if (V4LLookup::IsV4L2Device(device_path)) {
-          devices->push_back(
-              Device(GetVideoDeviceName(meta, filename), device_path));
-        }
-      }
-    } while (directoryIterator->Next());
-  } else {
-    LOG(LS_ERROR) << "Unable to detect v4l2 metadata directory";
-  }
-
-  if (devices->size() == 0) {
-    LOG(LS_INFO) << "Plan B. Scanning all video devices in /dev directory";
-    ScanDeviceDirectory("/dev/", devices);
-  }
-
-  LOG(LS_INFO) << "Total V4L2 devices found : " << devices->size();
-}
-
-bool LinuxDeviceManager::GetVideoCaptureDevices(std::vector<Device>* devices) {
-  devices->clear();
-  ScanV4L2Devices(devices);
-  return FilterDevices(devices, kFilteredVideoDevicesName);
-}
-
-LinuxDeviceWatcher::LinuxDeviceWatcher(DeviceManagerInterface* dm)
-    : DeviceWatcher(dm),
-      manager_(dm),
-      udev_(NULL),
-      udev_monitor_(NULL),
-      registered_(false) {
-}
-
-LinuxDeviceWatcher::~LinuxDeviceWatcher() {
-}
-
-static rtc::PhysicalSocketServer* CurrentSocketServer() {
-  rtc::SocketServer* ss =
-      rtc::ThreadManager::Instance()->WrapCurrentThread()->socketserver();
-  return reinterpret_cast<rtc::PhysicalSocketServer*>(ss);
-}
-
-bool LinuxDeviceWatcher::Start() {
-  // We deliberately return true in the failure paths here because libudev is
-  // not a critical component of a Linux system so it may not be present/usable,
-  // and we don't want to halt LinuxDeviceManager initialization in such a case.
-  if (!libudev_.Load() || IsWrongLibUDevAbiVersion(libudev_.GetDllHandle())) {
-    LOG(LS_WARNING)
-        << "libudev not present/usable; LinuxDeviceWatcher disabled";
-    return true;
-  }
-  udev_ = libudev_.udev_new()();
-  if (!udev_) {
-    LOG_ERR(LS_ERROR) << "udev_new()";
-    return true;
-  }
-  // The second argument here is the event source. It can be either "kernel" or
-  // "udev", but "udev" is the only correct choice. Apps listen on udev and the
-  // udev daemon in turn listens on the kernel.
-  udev_monitor_ = libudev_.udev_monitor_new_from_netlink()(udev_, "udev");
-  if (!udev_monitor_) {
-    LOG_ERR(LS_ERROR) << "udev_monitor_new_from_netlink()";
-    return true;
-  }
-  // We only listen for changes in the video devices. Audio devices are more or
-  // less unimportant because receiving device change notifications really only
-  // matters for broadcasting updated send/recv capabilities based on whether
-  // there is at least one device available, and almost all computers have at
-  // least one audio device. Also, PulseAudio device notifications don't come
-  // from the udev daemon, they come from the PulseAudio daemon, so we'd only
-  // want to listen for audio device changes from udev if using ALSA. For
-  // simplicity, we don't bother with any audio stuff at all.
-  if (libudev_.udev_monitor_filter_add_match_subsystem_devtype()(
-          udev_monitor_, "video4linux", NULL) < 0) {
-    LOG_ERR(LS_ERROR) << "udev_monitor_filter_add_match_subsystem_devtype()";
-    return true;
-  }
-  if (libudev_.udev_monitor_enable_receiving()(udev_monitor_) < 0) {
-    LOG_ERR(LS_ERROR) << "udev_monitor_enable_receiving()";
-    return true;
-  }
-  CurrentSocketServer()->Add(this);
-  registered_ = true;
-  return true;
-}
-
-void LinuxDeviceWatcher::Stop() {
-  if (registered_) {
-    CurrentSocketServer()->Remove(this);
-    registered_ = false;
-  }
-  if (udev_monitor_) {
-    libudev_.udev_monitor_unref()(udev_monitor_);
-    udev_monitor_ = NULL;
-  }
-  if (udev_) {
-    libudev_.udev_unref()(udev_);
-    udev_ = NULL;
-  }
-  libudev_.Unload();
-}
-
-uint32_t LinuxDeviceWatcher::GetRequestedEvents() {
-  return rtc::DE_READ;
-}
-
-void LinuxDeviceWatcher::OnPreEvent(uint32_t ff) {
-  // Nothing to do.
-}
-
-void LinuxDeviceWatcher::OnEvent(uint32_t ff, int err) {
-  udev_device* device = libudev_.udev_monitor_receive_device()(udev_monitor_);
-  if (!device) {
-    // Probably the socket connection to the udev daemon was terminated (perhaps
-    // the daemon crashed or is being restarted?).
-    LOG_ERR(LS_WARNING) << "udev_monitor_receive_device()";
-    // Stop listening to avoid potential livelock (an fd with EOF in it is
-    // always considered readable).
-    CurrentSocketServer()->Remove(this);
-    registered_ = false;
-    return;
-  }
-  // Else we read the device successfully.
-
-  // Since we already have our own filesystem-based device enumeration code, we
-  // simply re-enumerate rather than inspecting the device event.
-  libudev_.udev_device_unref()(device);
-  manager_->SignalDevicesChange();
-}
-
-int LinuxDeviceWatcher::GetDescriptor() {
-  return libudev_.udev_monitor_get_fd()(udev_monitor_);
-}
-
-bool LinuxDeviceWatcher::IsDescriptorClosed() {
-  // If it is closed then we will just get an error in
-  // udev_monitor_receive_device and unregister, so we don't need to check for
-  // it separately.
-  return false;
-}
-
-};  // namespace cricket