X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2Flib%2Fimplementations%2FCECCommandHandler.cpp;h=e9b0a79c2b86910dd1b5ab2a9a5b0c409deed68d;hb=be5b0e24ecd0ab142b4a85197d10b07a57bf0e17;hp=314313d26156a78815b63e3d650a7967b74797c2;hpb=1b5cc4a2517ee8e6cebb44063ea03eb4128b4ab1;p=deb_libcec.git

diff --git a/src/lib/implementations/CECCommandHandler.cpp b/src/lib/implementations/CECCommandHandler.cpp
index 314313d..e9b0a79 100644
--- a/src/lib/implementations/CECCommandHandler.cpp
+++ b/src/lib/implementations/CECCommandHandler.cpp
@@ -1,4 +1,3 @@
-#pragma once
 /*
  * This file is part of the libCEC(R) library.
  *
@@ -32,10 +31,13 @@
  */
 
 #include "CECCommandHandler.h"
-#include "CECBusDevice.h"
-#include "CECProcessor.h"
+#include "../devices/CECBusDevice.h"
+#include "../devices/CECAudioSystem.h"
+#include "../devices/CECPlaybackDevice.h"
+#include "../CECProcessor.h"
 
 using namespace CEC;
+using namespace std;
 
 CCECCommandHandler::CCECCommandHandler(CCECBusDevice *busDevice)
 {
@@ -46,10 +48,25 @@ bool CCECCommandHandler::HandleCommand(const cec_command &command)
 {
   bool bHandled(true);
 
-  if (command.destination == m_busDevice->GetMyLogicalAddress())
+  CStdString strLog;
+  strLog.Format(">> %s (%X) -> %s (%X): %s (%2X)", ToString(command.initiator), command.initiator, ToString(command.destination), command.destination, ToString(command.opcode), command.opcode);
+  m_busDevice->AddLog(CEC_LOG_NOTICE, strLog);
+
+  if (m_busDevice->MyLogicalAddressContains(command.destination))
   {
     switch(command.opcode)
     {
+    case CEC_OPCODE_REPORT_POWER_STATUS:
+      HandleReportPowerStatus(command);
+      break;
+    case CEC_OPCODE_CEC_VERSION:
+      HandleDeviceCecVersion(command);
+      break;
+    case CEC_OPCODE_SET_MENU_LANGUAGE:
+      HandleSetMenuLanguage(command);
+      /* pass to listeners */
+      m_busDevice->GetProcessor()->AddCommand(command);
+      break;
     case CEC_OPCODE_GIVE_PHYSICAL_ADDRESS:
       HandleGivePhysicalAddress(command);
       break;
@@ -83,8 +100,19 @@ bool CCECCommandHandler::HandleCommand(const cec_command &command)
     case CEC_OPCODE_USER_CONTROL_RELEASE:
       HandleUserControlRelease(command);
       break;
+    case CEC_OPCODE_GIVE_AUDIO_STATUS:
+      HandleGiveAudioStatus(command);
+      break;
+    case CEC_OPCODE_GIVE_SYSTEM_AUDIO_MODE_STATUS:
+      HandleGiveSystemAudioModeStatus(command);
+      break;
+    case CEC_OPCODE_SYSTEM_AUDIO_MODE_REQUEST:
+      HandleSetSystemAudioModeRequest(command);
+      break;
     default:
       UnhandledCommand(command);
+      /* pass to listeners */
+      m_busDevice->GetProcessor()->AddCommand(command);
       bHandled = false;
       break;
     }
@@ -94,6 +122,11 @@ bool CCECCommandHandler::HandleCommand(const cec_command &command)
     CStdString strLog;
     switch (command.opcode)
     {
+    case CEC_OPCODE_SET_MENU_LANGUAGE:
+      HandleSetMenuLanguage(command);
+      /* pass to listeners */
+      m_busDevice->GetProcessor()->AddCommand(command);
+      break;
     case CEC_OPCODE_REQUEST_ACTIVE_SOURCE:
       HandleRequestActiveSource(command);
       break;
@@ -109,8 +142,20 @@ bool CCECCommandHandler::HandleCommand(const cec_command &command)
     case CEC_OPCODE_VENDOR_COMMAND_WITH_ID:
       HandleDeviceVendorCommandWithId(command);
      break;
+    case CEC_OPCODE_STANDBY:
+      HandleStandby(command);
+      /* pass to listeners */
+      m_busDevice->GetProcessor()->AddCommand(command);
+     break;
+    case CEC_OPCODE_ACTIVE_SOURCE:
+      HandleActiveSource(command);
+      /* pass to listeners */
+      m_busDevice->GetProcessor()->AddCommand(command);
+      break;
     default:
       UnhandledCommand(command);
+      /* pass to listeners */
+      m_busDevice->GetProcessor()->AddCommand(command);
       bHandled = false;
       break;
     }
@@ -118,7 +163,7 @@ bool CCECCommandHandler::HandleCommand(const cec_command &command)
   else
   {
     CStdString strLog;
-    strLog.Format("ignoring frame: destination: %u != %u", command.destination, (uint8_t)m_busDevice->GetMyLogicalAddress());
+    strLog.Format("ignoring frame: we're not at destination %x", command.destination);
     m_busDevice->AddLog(CEC_LOG_DEBUG, strLog.c_str());
     bHandled = false;
   }
@@ -126,59 +171,123 @@ bool CCECCommandHandler::HandleCommand(const cec_command &command)
   return bHandled;
 }
 
+bool CCECCommandHandler::HandleActiveSource(const cec_command &command)
+{
+  if (command.parameters.size == 2)
+  {
+    uint16_t iAddress = ((uint16_t)command.parameters[0] << 8) | ((uint16_t)command.parameters[1]);
+    return m_busDevice->GetProcessor()->SetStreamPath(iAddress);
+  }
+
+  return true;
+}
+
+bool CCECCommandHandler::HandleDeviceCecVersion(const cec_command &command)
+{
+  if (command.parameters.size == 1)
+  {
+    CCECBusDevice *device = GetDevice(command.initiator);
+    if (device)
+      device->SetCecVersion((cec_version) command.parameters[0]);
+  }
+
+  return true;
+}
+
 bool CCECCommandHandler::HandleDeviceVendorCommandWithId(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ParseVendorId(command.initiator, command.parameters);
+  SetVendorId(command);
   return true;
 }
 
 bool CCECCommandHandler::HandleDeviceVendorId(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ParseVendorId(command.initiator, command.parameters);
+  SetVendorId(command);
   return true;
 }
 
 bool CCECCommandHandler::HandleGetCecVersion(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ReportCECVersion(command.initiator);
-  return true;
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device)
+    return device->TransmitCECVersion(command.initiator);
+
+  return false;
+}
+
+bool CCECCommandHandler::HandleGiveAudioStatus(const cec_command &command)
+{
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device && device->GetType() == CEC_DEVICE_TYPE_AUDIO_SYSTEM)
+    return ((CCECAudioSystem *) device)->TransmitAudioStatus(command.initiator);
+
+  return false;
 }
 
 bool CCECCommandHandler::HandleGiveDeckStatus(const cec_command &command)
 {
-  // need to support opcodes play and deck control before doing anything with this
-  m_busDevice->GetProcessor()->TransmitAbort(command.initiator, CEC_OPCODE_GIVE_DECK_STATUS);
-  return true;
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device && device->GetType() == CEC_DEVICE_TYPE_PLAYBACK_DEVICE)
+    return ((CCECPlaybackDevice *) device)->TransmitDeckStatus(command.initiator);
+
+  return false;
 }
 
 bool CCECCommandHandler::HandleGiveDevicePowerStatus(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ReportPowerState(command.initiator);
-  return true;
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device)
+    return device->TransmitPowerState(command.initiator);
+
+  return false;
 }
 
 bool CCECCommandHandler::HandleGiveDeviceVendorId(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ReportVendorID(command.initiator);
-  return true;
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device)
+    return device->TransmitVendorID(command.initiator);
+
+  return false;
 }
 
 bool CCECCommandHandler::HandleGiveOSDName(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ReportOSDName(command.initiator);
-  return true;
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device)
+    return device->TransmitOSDName(command.initiator);
+
+  return false;
 }
 
 bool CCECCommandHandler::HandleGivePhysicalAddress(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->ReportPhysicalAddress();
-  return true;
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device)
+    return device->TransmitPhysicalAddress();
+
+  return false;
 }
 
 bool CCECCommandHandler::HandleMenuRequest(const cec_command &command)
 {
   if (command.parameters[0] == CEC_MENU_REQUEST_TYPE_QUERY)
-    m_busDevice->GetProcessor()->ReportMenuState(command.initiator);
+  {
+    CCECBusDevice *device = GetDevice(command.destination);
+    if (device)
+      return device->TransmitMenuState(command.initiator);
+  }
+  return false;
+}
+
+bool CCECCommandHandler::HandleReportPowerStatus(const cec_command &command)
+{
+  if (command.parameters.size == 1)
+  {
+    CCECBusDevice *device = GetDevice(command.initiator);
+    if (device)
+      device->SetPowerStatus((cec_power_status) command.parameters[0]);
+  }
   return true;
 }
 
@@ -187,7 +296,10 @@ bool CCECCommandHandler::HandleRequestActiveSource(const cec_command &command)
   CStdString strLog;
   strLog.Format(">> %i requests active source", (uint8_t) command.initiator);
   m_busDevice->AddLog(CEC_LOG_DEBUG, strLog.c_str());
-  m_busDevice->GetProcessor()->BroadcastActiveSource();
+
+  vector<CCECBusDevice *> devices;
+  for (int iDevicePtr = (int)GetMyDevices(devices)-1; iDevicePtr >=0; iDevicePtr--)
+    devices[iDevicePtr]->TransmitActiveSource();
   return true;
 }
 
@@ -197,11 +309,28 @@ bool CCECCommandHandler::HandleRoutingChange(const cec_command &command)
   {
     uint16_t iOldAddress = ((uint16_t)command.parameters[0] << 8) | ((uint16_t)command.parameters[1]);
     uint16_t iNewAddress = ((uint16_t)command.parameters[2] << 8) | ((uint16_t)command.parameters[3]);
-    CStdString strLog;
-    strLog.Format(">> %i changed physical address from %04x to %04x", command.initiator, iOldAddress, iNewAddress);
-    m_busDevice->AddLog(CEC_LOG_DEBUG, strLog.c_str());
 
-    m_busDevice->GetProcessor()->AddCommand(command);
+    CCECBusDevice *device = GetDevice(command.initiator);
+    if (device)
+      device->SetStreamPath(iNewAddress, iOldAddress);
+  }
+  return true;
+}
+
+bool CCECCommandHandler::HandleSetMenuLanguage(const cec_command &command)
+{
+  if (command.parameters.size == 3)
+  {
+    CCECBusDevice *device = GetDevice(command.initiator);
+    if (device)
+    {
+      cec_menu_language language;
+      language.device = command.initiator;
+      for (uint8_t iPtr = 0; iPtr < 4; iPtr++)
+        language.language[iPtr] = command.parameters[iPtr];
+      language.language[3] = 0;
+      device->SetMenuLanguage(language);
+    }
   }
   return true;
 }
@@ -214,12 +343,41 @@ bool CCECCommandHandler::HandleSetStreamPath(const cec_command &command)
     CStdString strLog;
     strLog.Format(">> %i requests stream path from physical address %04x", command.initiator, streamaddr);
     m_busDevice->AddLog(CEC_LOG_DEBUG, strLog.c_str());
-    if (streamaddr == m_busDevice->GetMyPhysicalAddress())
-      m_busDevice->GetProcessor()->BroadcastActiveSource();
+    CCECBusDevice *device = GetDeviceByPhysicalAddress(streamaddr);
+    if (device)
+      return device->TransmitActiveSource();
+  }
+  return true;
+}
+
+bool CCECCommandHandler::HandleSetSystemAudioModeRequest(const cec_command &command)
+{
+  if (command.parameters.size >= 1)
+  {
+    CCECBusDevice *device = GetDevice(command.destination);
+    if (device&& device->GetType() == CEC_DEVICE_TYPE_AUDIO_SYSTEM)
+      return ((CCECAudioSystem *) device)->SetSystemAudioMode(command);
   }
   return true;
 }
 
+bool CCECCommandHandler::HandleStandby(const cec_command &command)
+{
+  CCECBusDevice *device = GetDevice(command.initiator);
+  if (device)
+    device->SetPowerStatus(CEC_POWER_STATUS_STANDBY);
+  return true;
+}
+
+bool CCECCommandHandler::HandleGiveSystemAudioModeStatus(const cec_command &command)
+{
+  CCECBusDevice *device = GetDevice(command.destination);
+  if (device && device->GetType() == CEC_DEVICE_TYPE_AUDIO_SYSTEM)
+    return ((CCECAudioSystem *) device)->TransmitSystemAudioModeStatus(command.initiator);
+
+  return false;
+}
+
 bool CCECCommandHandler::HandleUserControlPressed(const cec_command &command)
 {
   if (command.parameters.size > 0)
@@ -246,5 +404,269 @@ bool CCECCommandHandler::HandleUserControlRelease(const cec_command &command)
 
 void CCECCommandHandler::UnhandledCommand(const cec_command &command)
 {
-  m_busDevice->GetProcessor()->AddCommand(command);;
+  CStdString strLog;
+  strLog.Format("unhandled command with opcode %02x from address %d", command.opcode, command.initiator);
+  m_busDevice->AddLog(CEC_LOG_DEBUG, strLog);
+}
+
+unsigned int CCECCommandHandler::GetMyDevices(vector<CCECBusDevice *> &devices) const
+{
+  unsigned int iReturn(0);
+
+  cec_logical_addresses addresses = m_busDevice->GetProcessor()->GetLogicalAddresses();
+  for (unsigned int iPtr = 0; iPtr < 16; iPtr++)
+  {
+    if (addresses[iPtr])
+    {
+      devices.push_back(GetDevice((cec_logical_address) iPtr));
+      ++iReturn;
+    }
+  }
+
+  return iReturn;
+}
+
+CCECBusDevice *CCECCommandHandler::GetDevice(cec_logical_address iLogicalAddress) const
+{
+  CCECBusDevice *device = NULL;
+
+  if (iLogicalAddress >= CECDEVICE_TV && iLogicalAddress <= CECDEVICE_BROADCAST)
+    device = m_busDevice->GetProcessor()->m_busDevices[iLogicalAddress];
+
+  return device;
+}
+
+CCECBusDevice *CCECCommandHandler::GetDeviceByPhysicalAddress(uint16_t iPhysicalAddress) const
+{
+  return m_busDevice->GetProcessor()->GetDeviceByPhysicalAddress(iPhysicalAddress);
+}
+
+void CCECCommandHandler::SetVendorId(const cec_command &command)
+{
+  if (command.parameters.size < 3)
+  {
+    m_busDevice->AddLog(CEC_LOG_WARNING, "invalid vendor ID received");
+    return;
+  }
+
+  uint64_t iVendorId = ((uint64_t)command.parameters[0] << 16) +
+                       ((uint64_t)command.parameters[1] << 8) +
+                        (uint64_t)command.parameters[2];
+
+  CCECBusDevice *device = GetDevice((cec_logical_address) command.initiator);
+  if (device)
+    device->SetVendorId(iVendorId, command.parameters.size > 3 ? command.parameters[3] : 0);
+}
+
+const char *CCECCommandHandler::ToString(const cec_logical_address address)
+{
+  switch(address)
+  {
+  case CECDEVICE_AUDIOSYSTEM:
+    return "Audio";
+  case CECDEVICE_BROADCAST:
+    return "Broadcast";
+  case CECDEVICE_FREEUSE:
+    return "Free use";
+  case CECDEVICE_PLAYBACKDEVICE1:
+    return "Playback 1";
+  case CECDEVICE_PLAYBACKDEVICE2:
+    return "Playback 2";
+  case CECDEVICE_PLAYBACKDEVICE3:
+    return "Playback 3";
+  case CECDEVICE_RECORDINGDEVICE1:
+    return "Recorder 1";
+  case CECDEVICE_RECORDINGDEVICE2:
+    return "Recorder 2";
+  case CECDEVICE_RECORDINGDEVICE3:
+    return "Recorder 3";
+  case CECDEVICE_RESERVED1:
+    return "Reserved 1";
+  case CECDEVICE_RESERVED2:
+    return "Reserved 2";
+  case CECDEVICE_TUNER1:
+    return "Tuner 1";
+  case CECDEVICE_TUNER2:
+    return "Tuner 2";
+  case CECDEVICE_TUNER3:
+    return "Tuner 3";
+  case CECDEVICE_TUNER4:
+    return "Tuner 4";
+  case CECDEVICE_TV:
+    return "TV";
+  default:
+    return "unknown";
+  }
+}
+
+const char *CCECCommandHandler::ToString(const cec_deck_info status)
+{
+  switch (status)
+  {
+  case CEC_DECK_INFO_PLAY:
+    return "play";
+  case CEC_DECK_INFO_RECORD:
+    return "record";
+  case CEC_DECK_INFO_PLAY_REVERSE:
+    return "play reverse";
+  case CEC_DECK_INFO_STILL:
+    return "still";
+  case CEC_DECK_INFO_SLOW:
+    return "slow";
+  case CEC_DECK_INFO_SLOW_REVERSE:
+    return "slow reverse";
+  case CEC_DECK_INFO_FAST_FORWARD:
+    return "fast forward";
+  case CEC_DECK_INFO_FAST_REVERSE:
+    return "fast reverse";
+  case CEC_DECK_INFO_NO_MEDIA:
+    return "no media";
+  case CEC_DECK_INFO_STOP:
+    return "stop";
+  case CEC_DECK_INFO_SKIP_FORWARD_WIND:
+    return "info skip forward wind";
+  case CEC_DECK_INFO_SKIP_REVERSE_REWIND:
+    return "info skip reverse rewind";
+  case CEC_DECK_INFO_INDEX_SEARCH_FORWARD:
+    return "info index search forward";
+  case CEC_DECK_INFO_INDEX_SEARCH_REVERSE:
+    return "info index search reverse";
+  case CEC_DECK_INFO_OTHER_STATUS:
+    return "other";
+  default:
+    return "unknown";
+  }
+}
+
+const char *CCECCommandHandler::ToString(const cec_opcode opcode)
+{
+  switch (opcode)
+  {
+  case CEC_OPCODE_ACTIVE_SOURCE:
+    return "active source";
+  case CEC_OPCODE_IMAGE_VIEW_ON:
+    return "image view on";
+  case CEC_OPCODE_TEXT_VIEW_ON:
+    return "text view on";
+  case CEC_OPCODE_INACTIVE_SOURCE:
+    return "inactive source";
+  case CEC_OPCODE_REQUEST_ACTIVE_SOURCE:
+    return "request active source";
+  case CEC_OPCODE_ROUTING_CHANGE:
+    return "routing change";
+  case CEC_OPCODE_ROUTING_INFORMATION:
+    return "routing information";
+  case CEC_OPCODE_SET_STREAM_PATH:
+    return "set stream path";
+  case CEC_OPCODE_STANDBY:
+    return "standby";
+  case CEC_OPCODE_RECORD_OFF:
+    return "record off";
+  case CEC_OPCODE_RECORD_ON:
+    return "record on";
+  case CEC_OPCODE_RECORD_STATUS:
+    return "record status";
+  case CEC_OPCODE_RECORD_TV_SCREEN:
+    return "record tv screen";
+  case CEC_OPCODE_CLEAR_ANALOGUE_TIMER:
+    return "clear analogue timer";
+  case CEC_OPCODE_CLEAR_DIGITAL_TIMER:
+    return "clear digital timer";
+  case CEC_OPCODE_CLEAR_EXTERNAL_TIMER:
+    return "clear external timer";
+  case CEC_OPCODE_SET_ANALOGUE_TIMER:
+    return "set analogue timer";
+  case CEC_OPCODE_SET_DIGITAL_TIMER:
+    return "set digital timer";
+  case CEC_OPCODE_SET_EXTERNAL_TIMER:
+    return "set external timer";
+  case CEC_OPCODE_SET_TIMER_PROGRAM_TITLE:
+    return "set timer program title";
+  case CEC_OPCODE_TIMER_CLEARED_STATUS:
+    return "timer cleared status";
+  case CEC_OPCODE_TIMER_STATUS:
+    return "timer status";
+  case CEC_OPCODE_CEC_VERSION:
+    return "cec version";
+  case CEC_OPCODE_GET_CEC_VERSION:
+    return "get cec version";
+  case CEC_OPCODE_GIVE_PHYSICAL_ADDRESS:
+    return "give physical address";
+  case CEC_OPCODE_GET_MENU_LANGUAGE:
+    return "get menu language";
+  case CEC_OPCODE_REPORT_PHYSICAL_ADDRESS:
+    return "report physical address";
+  case CEC_OPCODE_SET_MENU_LANGUAGE:
+    return "set menu language";
+  case CEC_OPCODE_DECK_CONTROL:
+    return "deck control";
+  case CEC_OPCODE_DECK_STATUS:
+    return "deck status";
+  case CEC_OPCODE_GIVE_DECK_STATUS:
+    return "give deck status";
+  case CEC_OPCODE_PLAY:
+    return "play";
+  case CEC_OPCODE_GIVE_TUNER_DEVICE_STATUS:
+    return "give tuner status";
+  case CEC_OPCODE_SELECT_ANALOGUE_SERVICE:
+    return "select analogue service";
+  case CEC_OPCODE_SELECT_DIGITAL_SERVICE:
+    return "set digital service";
+  case CEC_OPCODE_TUNER_DEVICE_STATUS:
+    return "tuner device status";
+  case CEC_OPCODE_TUNER_STEP_DECREMENT:
+    return "tuner step decrement";
+  case CEC_OPCODE_TUNER_STEP_INCREMENT:
+    return "tuner step increment";
+  case CEC_OPCODE_DEVICE_VENDOR_ID:
+    return "device vendor id";
+  case CEC_OPCODE_GIVE_DEVICE_VENDOR_ID:
+    return "give device vendor id";
+  case CEC_OPCODE_VENDOR_COMMAND:
+    return "vendor command";
+  case CEC_OPCODE_VENDOR_COMMAND_WITH_ID:
+    return "vendor command with id";
+  case CEC_OPCODE_VENDOR_REMOTE_BUTTON_DOWN:
+    return "vendor remote button down";
+  case CEC_OPCODE_VENDOR_REMOTE_BUTTON_UP:
+    return "vendor remote button up";
+  case CEC_OPCODE_SET_OSD_STRING:
+    return "set osd string";
+  case CEC_OPCODE_GIVE_OSD_NAME:
+    return "give osd name";
+  case CEC_OPCODE_SET_OSD_NAME:
+    return "set osd name";
+  case CEC_OPCODE_MENU_REQUEST:
+    return "menu request";
+  case CEC_OPCODE_MENU_STATUS:
+    return "menu status";
+  case CEC_OPCODE_USER_CONTROL_PRESSED:
+    return "user control pressed";
+  case CEC_OPCODE_USER_CONTROL_RELEASE:
+    return "user control release";
+  case CEC_OPCODE_GIVE_DEVICE_POWER_STATUS:
+    return "give device power status";
+  case CEC_OPCODE_REPORT_POWER_STATUS:
+    return "report power status";
+  case CEC_OPCODE_FEATURE_ABORT:
+    return "feature abort";
+  case CEC_OPCODE_ABORT:
+    return "abort";
+  case CEC_OPCODE_GIVE_AUDIO_STATUS:
+    return "give audio status";
+  case CEC_OPCODE_GIVE_SYSTEM_AUDIO_MODE_STATUS:
+    return "give audio mode status";
+  case CEC_OPCODE_REPORT_AUDIO_STATUS:
+    return "report audio status";
+  case CEC_OPCODE_SET_SYSTEM_AUDIO_MODE:
+    return "set system audio mode";
+  case CEC_OPCODE_SYSTEM_AUDIO_MODE_REQUEST:
+    return "system audio mode request";
+  case CEC_OPCODE_SYSTEM_AUDIO_MODE_STATUS:
+    return "system audio mode status";
+  case CEC_OPCODE_SET_AUDIO_RATE:
+    return "set audio rate";
+  default:
+    return "UNKNOWN";
+  }
 }