media/cdm/ppapi/cdm

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This source file includes following definitions.
IsMainThread
PostOnMain
CallOnMain
ConfigureInputBuffer
CdmStatusToPpDecryptResult
CdmVideoFormatToPpDecryptedFrameFormat
CdmAudioFormatToPpDecryptedSampleFormat
PpAudioCodecToCdmAudioCodec
PpVideoCodecToCdmVideoCodec
PpVCProfileToCdmVCProfile
PpDecryptedFrameFormatToCdmVideoFormat
PpDecryptorStreamTypeToCdmStreamType
deferred_video_decoder_config_id_
CreateCdmInstance
Initialize
CreateSession
LoadSession
UpdateSession
ReleaseSession
Decrypt
InitializeAudioDecoder
InitializeVideoDecoder
DeinitializeDecoder
ResetDecoder
DecryptAndDecode
Allocate
SetTimer
TimerExpired
GetCurrentWallTimeInSeconds
SendKeyMessage
SendKeyError
GetPrivateData
OnSessionCreated
OnSessionMessage
OnSessionReady
OnSessionClosed
OnSessionError
SendSessionCreatedInternal
SendSessionMessageInternal
SendSessionReadyInternal
SendSessionClosedInternal
SendSessionErrorInternal
DeliverBlock
DecoderInitializeDone
DecoderDeinitializeDone
DecoderResetDone
DeliverFrame
DeliverSamples
IsValidVideoFrame
LogToConsole
SendPlatformChallenge
EnableOutputProtection
QueryOutputProtectionStatus
OnDeferredInitializationDone
CreateFileIO
SendPlatformChallengeDone
EnableProtectionDone
QueryOutputProtectionStatusDone
GetCdmHost
CreateInstance
CreateModule
// Copyright 2013 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 "media/cdm/ppapi/cdm_adapter.h"

#include "media/cdm/ppapi/cdm_file_io_impl.h"
#include "media/cdm/ppapi/cdm_helpers.h"
#include "media/cdm/ppapi/cdm_logging.h"
#include "media/cdm/ppapi/supported_cdm_versions.h"
#include "ppapi/c/ppb_console.h"

#if defined(CHECK_DOCUMENT_URL)
#include "ppapi/cpp/dev/url_util_dev.h"
#include "ppapi/cpp/instance_handle.h"
#endif  // defined(CHECK_DOCUMENT_URL)

namespace {

#if !defined(NDEBUG)
  #define DLOG_TO_CONSOLE(message) LogToConsole(message);
#else
  #define DLOG_TO_CONSOLE(message) (void)(message);
#endif

bool IsMainThread() {
  return pp::Module::Get()->core()->IsMainThread();
}

// Posts a task to run |cb| on the main thread. The task is posted even if the
// current thread is the main thread.
void PostOnMain(pp::CompletionCallback cb) {
  pp::Module::Get()->core()->CallOnMainThread(0, cb, PP_OK);
}

// Ensures |cb| is called on the main thread, either because the current thread
// is the main thread or by posting it to the main thread.
void CallOnMain(pp::CompletionCallback cb) {
  // TODO(tomfinegan): This is only necessary because PPAPI doesn't allow calls
  // off the main thread yet. Remove this once the change lands.
  if (IsMainThread())
    cb.Run(PP_OK);
  else
    PostOnMain(cb);
}

// Configures a cdm::InputBuffer. |subsamples| must exist as long as
// |input_buffer| is in use.
void ConfigureInputBuffer(
    const pp::Buffer_Dev& encrypted_buffer,
    const PP_EncryptedBlockInfo& encrypted_block_info,
    std::vector<cdm::SubsampleEntry>* subsamples,
    cdm::InputBuffer* input_buffer) {
  PP_DCHECK(subsamples);
  PP_DCHECK(!encrypted_buffer.is_null());

  input_buffer->data = static_cast<uint8_t*>(encrypted_buffer.data());
  input_buffer->data_size = encrypted_block_info.data_size;
  PP_DCHECK(encrypted_buffer.size() >= input_buffer->data_size);

  PP_DCHECK(encrypted_block_info.key_id_size <=
            arraysize(encrypted_block_info.key_id));
  input_buffer->key_id_size = encrypted_block_info.key_id_size;
  input_buffer->key_id = input_buffer->key_id_size > 0 ?
      encrypted_block_info.key_id : NULL;

  PP_DCHECK(encrypted_block_info.iv_size <= arraysize(encrypted_block_info.iv));
  input_buffer->iv_size = encrypted_block_info.iv_size;
  input_buffer->iv = encrypted_block_info.iv_size > 0 ?
      encrypted_block_info.iv : NULL;

  input_buffer->num_subsamples = encrypted_block_info.num_subsamples;
  if (encrypted_block_info.num_subsamples > 0) {
    subsamples->reserve(encrypted_block_info.num_subsamples);

    for (uint32_t i = 0; i < encrypted_block_info.num_subsamples; ++i) {
      subsamples->push_back(cdm::SubsampleEntry(
          encrypted_block_info.subsamples[i].clear_bytes,
          encrypted_block_info.subsamples[i].cipher_bytes));
    }

    input_buffer->subsamples = &(*subsamples)[0];
  }

  input_buffer->timestamp = encrypted_block_info.tracking_info.timestamp;
}

PP_DecryptResult CdmStatusToPpDecryptResult(cdm::Status status) {
  switch (status) {
    case cdm::kSuccess:
      return PP_DECRYPTRESULT_SUCCESS;
    case cdm::kNoKey:
      return PP_DECRYPTRESULT_DECRYPT_NOKEY;
    case cdm::kNeedMoreData:
      return PP_DECRYPTRESULT_NEEDMOREDATA;
    case cdm::kDecryptError:
      return PP_DECRYPTRESULT_DECRYPT_ERROR;
    case cdm::kDecodeError:
      return PP_DECRYPTRESULT_DECODE_ERROR;
    default:
      PP_NOTREACHED();
      return PP_DECRYPTRESULT_DECODE_ERROR;
  }
}

PP_DecryptedFrameFormat CdmVideoFormatToPpDecryptedFrameFormat(
    cdm::VideoFormat format) {
  switch (format) {
    case cdm::kYv12:
      return PP_DECRYPTEDFRAMEFORMAT_YV12;
    case cdm::kI420:
      return PP_DECRYPTEDFRAMEFORMAT_I420;
    default:
      return PP_DECRYPTEDFRAMEFORMAT_UNKNOWN;
  }
}

PP_DecryptedSampleFormat CdmAudioFormatToPpDecryptedSampleFormat(
    cdm::AudioFormat format) {
  switch (format) {
    case cdm::kAudioFormatU8:
      return PP_DECRYPTEDSAMPLEFORMAT_U8;
    case cdm::kAudioFormatS16:
      return PP_DECRYPTEDSAMPLEFORMAT_S16;
    case cdm::kAudioFormatS32:
      return PP_DECRYPTEDSAMPLEFORMAT_S32;
    case cdm::kAudioFormatF32:
      return PP_DECRYPTEDSAMPLEFORMAT_F32;
    case cdm::kAudioFormatPlanarS16:
      return PP_DECRYPTEDSAMPLEFORMAT_PLANAR_S16;
    case cdm::kAudioFormatPlanarF32:
      return PP_DECRYPTEDSAMPLEFORMAT_PLANAR_F32;
    default:
      return PP_DECRYPTEDSAMPLEFORMAT_UNKNOWN;
  }
}

cdm::AudioDecoderConfig::AudioCodec PpAudioCodecToCdmAudioCodec(
    PP_AudioCodec codec) {
  switch (codec) {
    case PP_AUDIOCODEC_VORBIS:
      return cdm::AudioDecoderConfig::kCodecVorbis;
    case PP_AUDIOCODEC_AAC:
      return cdm::AudioDecoderConfig::kCodecAac;
    default:
      return cdm::AudioDecoderConfig::kUnknownAudioCodec;
  }
}

cdm::VideoDecoderConfig::VideoCodec PpVideoCodecToCdmVideoCodec(
    PP_VideoCodec codec) {
  switch (codec) {
    case PP_VIDEOCODEC_VP8:
      return cdm::VideoDecoderConfig::kCodecVp8;
    case PP_VIDEOCODEC_H264:
      return cdm::VideoDecoderConfig::kCodecH264;
    default:
      return cdm::VideoDecoderConfig::kUnknownVideoCodec;
  }
}

cdm::VideoDecoderConfig::VideoCodecProfile PpVCProfileToCdmVCProfile(
    PP_VideoCodecProfile profile) {
  switch (profile) {
    case PP_VIDEOCODECPROFILE_VP8_MAIN:
      return cdm::VideoDecoderConfig::kVp8ProfileMain;
    case PP_VIDEOCODECPROFILE_H264_BASELINE:
      return cdm::VideoDecoderConfig::kH264ProfileBaseline;
    case PP_VIDEOCODECPROFILE_H264_MAIN:
      return cdm::VideoDecoderConfig::kH264ProfileMain;
    case PP_VIDEOCODECPROFILE_H264_EXTENDED:
      return cdm::VideoDecoderConfig::kH264ProfileExtended;
    case PP_VIDEOCODECPROFILE_H264_HIGH:
      return cdm::VideoDecoderConfig::kH264ProfileHigh;
    case PP_VIDEOCODECPROFILE_H264_HIGH_10:
      return cdm::VideoDecoderConfig::kH264ProfileHigh10;
    case PP_VIDEOCODECPROFILE_H264_HIGH_422:
      return cdm::VideoDecoderConfig::kH264ProfileHigh422;
    case PP_VIDEOCODECPROFILE_H264_HIGH_444_PREDICTIVE:
      return cdm::VideoDecoderConfig::kH264ProfileHigh444Predictive;
    default:
      return cdm::VideoDecoderConfig::kUnknownVideoCodecProfile;
  }
}

cdm::VideoFormat PpDecryptedFrameFormatToCdmVideoFormat(
    PP_DecryptedFrameFormat format) {
  switch (format) {
    case PP_DECRYPTEDFRAMEFORMAT_YV12:
      return cdm::kYv12;
    case PP_DECRYPTEDFRAMEFORMAT_I420:
      return cdm::kI420;
    default:
      return cdm::kUnknownVideoFormat;
  }
}

cdm::StreamType PpDecryptorStreamTypeToCdmStreamType(
    PP_DecryptorStreamType stream_type) {
  switch (stream_type) {
    case PP_DECRYPTORSTREAMTYPE_AUDIO:
      return cdm::kStreamTypeAudio;
    case PP_DECRYPTORSTREAMTYPE_VIDEO:
      return cdm::kStreamTypeVideo;
  }

  PP_NOTREACHED();
  return cdm::kStreamTypeVideo;
}

}  // namespace

namespace media {

CdmAdapter::CdmAdapter(PP_Instance instance, pp::Module* module)
    : pp::Instance(instance),
      pp::ContentDecryptor_Private(this),
#if defined(OS_CHROMEOS)
      output_protection_(this),
      platform_verification_(this),
      challenge_in_progress_(false),
      output_link_mask_(0),
      output_protection_mask_(0),
      query_output_protection_in_progress_(false),
#endif
      allocator_(this),
      cdm_(NULL),
      deferred_initialize_audio_decoder_(false),
      deferred_audio_decoder_config_id_(0),
      deferred_initialize_video_decoder_(false),
      deferred_video_decoder_config_id_(0) {
  callback_factory_.Initialize(this);
}

CdmAdapter::~CdmAdapter() {}

bool CdmAdapter::CreateCdmInstance(const std::string& key_system) {
  PP_DCHECK(!cdm_);
  cdm_ = make_linked_ptr(CdmWrapper::Create(
      key_system.data(), key_system.size(), GetCdmHost, this));
  bool success = cdm_ != NULL;

  const std::string message = "CDM instance for " + key_system +
                              (success ? "" : " could not be") + " created.";
  DLOG_TO_CONSOLE(message);
  CDM_DLOG() << message;

  return success;
}

// No errors should be reported in this function because the spec says:
// "Store this new error object internally with the MediaKeys instance being
// created. This will be used to fire an error against any session created for
// this instance." These errors will be reported during session creation
// (CreateSession()) or session loading (LoadSession()).
// TODO(xhwang): If necessary, we need to store the error here if we want to
// support more specific error reporting (other than "Unknown").
void CdmAdapter::Initialize(const std::string& key_system) {
  PP_DCHECK(!key_system.empty());
  PP_DCHECK(key_system_.empty() || (key_system_ == key_system && cdm_));

  if (!cdm_ && !CreateCdmInstance(key_system))
    return;

  PP_DCHECK(cdm_);
  key_system_ = key_system;
}

void CdmAdapter::CreateSession(uint32_t session_id,
                               const std::string& content_type,
                               pp::VarArrayBuffer init_data) {
  // Initialize() doesn't report an error, so CreateSession() can be called
  // even if Initialize() failed.
  if (!cdm_) {
    OnSessionError(session_id, cdm::kUnknownError, 0);
    return;
  }

#if defined(CHECK_DOCUMENT_URL)
  PP_URLComponents_Dev url_components = {};
  const pp::URLUtil_Dev* url_util = pp::URLUtil_Dev::Get();
  if (!url_util) {
    OnSessionError(session_id, cdm::kUnknownError, 0);
    return;
  }
  pp::Var href = url_util->GetDocumentURL(
      pp::InstanceHandle(pp_instance()), &url_components);
  PP_DCHECK(href.is_string());
  PP_DCHECK(!href.AsString().empty());
  PP_DCHECK(url_components.host.begin);
  PP_DCHECK(0 < url_components.host.len);
#endif  // defined(CHECK_DOCUMENT_URL)

  cdm_->CreateSession(session_id,
                      content_type.data(),
                      content_type.size(),
                      static_cast<const uint8_t*>(init_data.Map()),
                      init_data.ByteLength());
}

void CdmAdapter::LoadSession(uint32_t session_id,
                             const std::string& web_session_id) {
  // Initialize() doesn't report an error, so LoadSession() can be called
  // even if Initialize() failed.
  if (!cdm_) {
    OnSessionError(session_id, cdm::kUnknownError, 0);
    return;
  }

  if (!cdm_->LoadSession(
           session_id, web_session_id.data(), web_session_id.size()))
    OnSessionError(session_id, cdm::kUnknownError, 0);
}

void CdmAdapter::UpdateSession(uint32_t session_id,
                               pp::VarArrayBuffer response) {
  // TODO(jrummell): In EME WD, AddKey() can only be called on valid sessions.
  // We should be able to DCHECK(cdm_) when addressing http://crbug.com/249976.
  if (!cdm_) {
    OnSessionError(session_id, cdm::kUnknownError, 0);
    return;
  }

  const uint8_t* response_ptr = static_cast<const uint8_t*>(response.Map());
  const uint32_t response_size = response.ByteLength();

  if (!response_ptr || response_size <= 0) {
    OnSessionError(session_id, cdm::kUnknownError, 0);
    return;
  }
  CdmWrapper::Result result =
      cdm_->UpdateSession(session_id, response_ptr, response_size);
  switch (result) {
    case CdmWrapper::NO_ACTION:
      break;
    case CdmWrapper::CALL_KEY_ADDED:
      OnSessionReady(session_id);
      break;
    case CdmWrapper::CALL_KEY_ERROR:
      OnSessionError(session_id, cdm::kUnknownError, 0);
      break;
  }
}

void CdmAdapter::ReleaseSession(uint32_t session_id) {
  // TODO(jrummell): In EME WD, AddKey() can only be called on valid sessions.
  // We should be able to DCHECK(cdm_) when addressing http://crbug.com/249976.
  if (!cdm_) {
    OnSessionError(session_id, cdm::kUnknownError, 0);
    return;
  }

  CdmWrapper::Result result = cdm_->ReleaseSession(session_id);
  switch (result) {
    case CdmWrapper::NO_ACTION:
      break;
    case CdmWrapper::CALL_KEY_ADDED:
      PP_NOTREACHED();
      break;
    case CdmWrapper::CALL_KEY_ERROR:
      OnSessionError(session_id, cdm::kUnknownError, 0);
      break;
  }
}

// Note: In the following decryption/decoding related functions, errors are NOT
// reported via KeyError, but are reported via corresponding PPB calls.

void CdmAdapter::Decrypt(pp::Buffer_Dev encrypted_buffer,
                         const PP_EncryptedBlockInfo& encrypted_block_info) {
  PP_DCHECK(!encrypted_buffer.is_null());

  // Release a buffer that the caller indicated it is finished with.
  allocator_.Release(encrypted_block_info.tracking_info.buffer_id);

  cdm::Status status = cdm::kDecryptError;
  LinkedDecryptedBlock decrypted_block(new DecryptedBlockImpl());

  if (cdm_) {
    cdm::InputBuffer input_buffer;
    std::vector<cdm::SubsampleEntry> subsamples;
    ConfigureInputBuffer(encrypted_buffer, encrypted_block_info, &subsamples,
                         &input_buffer);
    status = cdm_->Decrypt(input_buffer, decrypted_block.get());
    PP_DCHECK(status != cdm::kSuccess ||
              (decrypted_block->DecryptedBuffer() &&
               decrypted_block->DecryptedBuffer()->Size()));
  }

  CallOnMain(callback_factory_.NewCallback(
      &CdmAdapter::DeliverBlock,
      status,
      decrypted_block,
      encrypted_block_info.tracking_info));
}

void CdmAdapter::InitializeAudioDecoder(
    const PP_AudioDecoderConfig& decoder_config,
    pp::Buffer_Dev extra_data_buffer) {
  PP_DCHECK(!deferred_initialize_audio_decoder_);
  PP_DCHECK(deferred_audio_decoder_config_id_ == 0);
  cdm::Status status = cdm::kSessionError;
  if (cdm_) {
    cdm::AudioDecoderConfig cdm_decoder_config;
    cdm_decoder_config.codec =
        PpAudioCodecToCdmAudioCodec(decoder_config.codec);
    cdm_decoder_config.channel_count = decoder_config.channel_count;
    cdm_decoder_config.bits_per_channel = decoder_config.bits_per_channel;
    cdm_decoder_config.samples_per_second = decoder_config.samples_per_second;
    cdm_decoder_config.extra_data =
        static_cast<uint8_t*>(extra_data_buffer.data());
    cdm_decoder_config.extra_data_size = extra_data_buffer.size();
    status = cdm_->InitializeAudioDecoder(cdm_decoder_config);
  }

  if (status == cdm::kDeferredInitialization) {
    deferred_initialize_audio_decoder_ = true;
    deferred_audio_decoder_config_id_ = decoder_config.request_id;
    return;
  }

  CallOnMain(callback_factory_.NewCallback(
      &CdmAdapter::DecoderInitializeDone,
      PP_DECRYPTORSTREAMTYPE_AUDIO,
      decoder_config.request_id,
      status == cdm::kSuccess));
}

void CdmAdapter::InitializeVideoDecoder(
    const PP_VideoDecoderConfig& decoder_config,
    pp::Buffer_Dev extra_data_buffer) {
  PP_DCHECK(!deferred_initialize_video_decoder_);
  PP_DCHECK(deferred_video_decoder_config_id_ == 0);
  cdm::Status status = cdm::kSessionError;
  if (cdm_) {
    cdm::VideoDecoderConfig cdm_decoder_config;
    cdm_decoder_config.codec =
        PpVideoCodecToCdmVideoCodec(decoder_config.codec);
    cdm_decoder_config.profile =
        PpVCProfileToCdmVCProfile(decoder_config.profile);
    cdm_decoder_config.format =
        PpDecryptedFrameFormatToCdmVideoFormat(decoder_config.format);
    cdm_decoder_config.coded_size.width = decoder_config.width;
    cdm_decoder_config.coded_size.height = decoder_config.height;
    cdm_decoder_config.extra_data =
        static_cast<uint8_t*>(extra_data_buffer.data());
    cdm_decoder_config.extra_data_size = extra_data_buffer.size();
    status = cdm_->InitializeVideoDecoder(cdm_decoder_config);
  }

  if (status == cdm::kDeferredInitialization) {
    deferred_initialize_video_decoder_ = true;
    deferred_video_decoder_config_id_ = decoder_config.request_id;
    return;
  }

  CallOnMain(callback_factory_.NewCallback(
      &CdmAdapter::DecoderInitializeDone,
      PP_DECRYPTORSTREAMTYPE_VIDEO,
      decoder_config.request_id,
      status == cdm::kSuccess));
}

void CdmAdapter::DeinitializeDecoder(PP_DecryptorStreamType decoder_type,
                                     uint32_t request_id) {
  PP_DCHECK(cdm_);  // InitializeXxxxxDecoder should have succeeded.
  if (cdm_) {
    cdm_->DeinitializeDecoder(
        PpDecryptorStreamTypeToCdmStreamType(decoder_type));
  }

  CallOnMain(callback_factory_.NewCallback(
      &CdmAdapter::DecoderDeinitializeDone,
      decoder_type,
      request_id));
}

void CdmAdapter::ResetDecoder(PP_DecryptorStreamType decoder_type,
                              uint32_t request_id) {
  PP_DCHECK(cdm_);  // InitializeXxxxxDecoder should have succeeded.
  if (cdm_)
    cdm_->ResetDecoder(PpDecryptorStreamTypeToCdmStreamType(decoder_type));

  CallOnMain(callback_factory_.NewCallback(&CdmAdapter::DecoderResetDone,
                                           decoder_type,
                                           request_id));
}

void CdmAdapter::DecryptAndDecode(
    PP_DecryptorStreamType decoder_type,
    pp::Buffer_Dev encrypted_buffer,
    const PP_EncryptedBlockInfo& encrypted_block_info) {
  PP_DCHECK(cdm_);  // InitializeXxxxxDecoder should have succeeded.
  // Release a buffer that the caller indicated it is finished with.
  allocator_.Release(encrypted_block_info.tracking_info.buffer_id);

  cdm::InputBuffer input_buffer;
  std::vector<cdm::SubsampleEntry> subsamples;
  if (cdm_ && !encrypted_buffer.is_null()) {
    ConfigureInputBuffer(encrypted_buffer,
                         encrypted_block_info,
                         &subsamples,
                         &input_buffer);
  }

  cdm::Status status = cdm::kDecodeError;

  switch (decoder_type) {
    case PP_DECRYPTORSTREAMTYPE_VIDEO: {
      LinkedVideoFrame video_frame(new VideoFrameImpl());
      if (cdm_)
        status = cdm_->DecryptAndDecodeFrame(input_buffer, video_frame.get());
      CallOnMain(callback_factory_.NewCallback(
          &CdmAdapter::DeliverFrame,
          status,
          video_frame,
          encrypted_block_info.tracking_info));
      return;
    }

    case PP_DECRYPTORSTREAMTYPE_AUDIO: {
      LinkedAudioFrames audio_frames(new AudioFramesImpl());
      if (cdm_) {
        status = cdm_->DecryptAndDecodeSamples(input_buffer,
                                               audio_frames.get());
      }
      CallOnMain(callback_factory_.NewCallback(
          &CdmAdapter::DeliverSamples,
          status,
          audio_frames,
          encrypted_block_info.tracking_info));
      return;
    }

    default:
      PP_NOTREACHED();
      return;
  }
}

cdm::Buffer* CdmAdapter::Allocate(uint32_t capacity) {
  return allocator_.Allocate(capacity);
}

void CdmAdapter::SetTimer(int64_t delay_ms, void* context) {
  // NOTE: doesn't really need to run on the main thread; could just as well run
  // on a helper thread if |cdm_| were thread-friendly and care was taken.  We
  // only use CallOnMainThread() here to get delayed-execution behavior.
  pp::Module::Get()->core()->CallOnMainThread(
      delay_ms,
      callback_factory_.NewCallback(&CdmAdapter::TimerExpired, context),
      PP_OK);
}

void CdmAdapter::TimerExpired(int32_t result, void* context) {
  PP_DCHECK(result == PP_OK);
  cdm_->TimerExpired(context);
}

double CdmAdapter::GetCurrentWallTimeInSeconds() {
  return pp::Module::Get()->core()->GetTime();
}

void CdmAdapter::SendKeyMessage(
    const char* session_id, uint32_t session_id_length,
    const char* message, uint32_t message_length,
    const char* default_url, uint32_t default_url_length) {
  PP_DCHECK(!key_system_.empty());

  std::string session_id_str(session_id, session_id_length);
  PP_DCHECK(!session_id_str.empty());
  uint32_t session_reference_id = cdm_->LookupSessionId(session_id_str);

  OnSessionCreated(session_reference_id, session_id, session_id_length);
  OnSessionMessage(session_reference_id,
                   message, message_length,
                   default_url, default_url_length);
}

void CdmAdapter::SendKeyError(const char* session_id,
                              uint32_t session_id_length,
                              cdm::MediaKeyError error_code,
                              uint32_t system_code) {
  std::string session_id_str(session_id, session_id_length);
  uint32_t session_reference_id = cdm_->LookupSessionId(session_id_str);
  OnSessionError(session_reference_id, error_code, system_code);
}

void CdmAdapter::GetPrivateData(int32_t* instance,
                                GetPrivateInterface* get_interface) {
  *instance = pp_instance();
  *get_interface = pp::Module::Get()->get_browser_interface();
}

void CdmAdapter::OnSessionCreated(uint32_t session_id,
                                  const char* web_session_id,
                                  uint32_t web_session_id_length) {
  PostOnMain(callback_factory_.NewCallback(
      &CdmAdapter::SendSessionCreatedInternal,
      session_id,
      std::string(web_session_id, web_session_id_length)));
}

void CdmAdapter::OnSessionMessage(uint32_t session_id,
                                  const char* message,
                                  uint32_t message_length,
                                  const char* destination_url,
                                  uint32_t destination_url_length) {
  PostOnMain(callback_factory_.NewCallback(
      &CdmAdapter::SendSessionMessageInternal,
      session_id,
      std::vector<uint8>(message, message + message_length),
      std::string(destination_url, destination_url_length)));
}

void CdmAdapter::OnSessionReady(uint32_t session_id) {
  PostOnMain(callback_factory_.NewCallback(
      &CdmAdapter::SendSessionReadyInternal, session_id));
}

void CdmAdapter::OnSessionClosed(uint32_t session_id) {
  PostOnMain(callback_factory_.NewCallback(
      &CdmAdapter::SendSessionClosedInternal, session_id));
}

void CdmAdapter::OnSessionError(uint32_t session_id,
                                cdm::MediaKeyError error_code,
                                uint32_t system_code) {
  PostOnMain(callback_factory_.NewCallback(
      &CdmAdapter::SendSessionErrorInternal,
      session_id,
      error_code,
      system_code));
}

void CdmAdapter::SendSessionCreatedInternal(int32_t result,
                                            uint32_t session_id,
                                            const std::string& web_session_id) {
  PP_DCHECK(result == PP_OK);
  pp::ContentDecryptor_Private::SessionCreated(session_id, web_session_id);
}

void CdmAdapter::SendSessionMessageInternal(int32_t result,
                                            uint32_t session_id,
                                            const std::vector<uint8>& message,
                                            const std::string& default_url) {
  PP_DCHECK(result == PP_OK);

  pp::VarArrayBuffer message_array_buffer(message.size());
  if (message.size() > 0) {
    memcpy(message_array_buffer.Map(), message.data(), message.size());
  }

  pp::ContentDecryptor_Private::SessionMessage(
      session_id, message_array_buffer, default_url);
}

void CdmAdapter::SendSessionReadyInternal(int32_t result, uint32_t session_id) {
  PP_DCHECK(result == PP_OK);
  pp::ContentDecryptor_Private::SessionReady(session_id);
}

void CdmAdapter::SendSessionClosedInternal(int32_t result,
                                           uint32_t session_id) {
  PP_DCHECK(result == PP_OK);
  pp::ContentDecryptor_Private::SessionClosed(session_id);
}

void CdmAdapter::SendSessionErrorInternal(int32_t result,
                                          uint32_t session_id,
                                          cdm::MediaKeyError error_code,
                                          uint32_t system_code) {
  PP_DCHECK(result == PP_OK);
  pp::ContentDecryptor_Private::SessionError(
      session_id, error_code, system_code);
}

void CdmAdapter::DeliverBlock(int32_t result,
                              const cdm::Status& status,
                              const LinkedDecryptedBlock& decrypted_block,
                              const PP_DecryptTrackingInfo& tracking_info) {
  PP_DCHECK(result == PP_OK);
  PP_DecryptedBlockInfo decrypted_block_info;
  decrypted_block_info.tracking_info = tracking_info;
  decrypted_block_info.tracking_info.timestamp = decrypted_block->Timestamp();
  decrypted_block_info.tracking_info.buffer_id = 0;
  decrypted_block_info.data_size = 0;
  decrypted_block_info.result = CdmStatusToPpDecryptResult(status);

  pp::Buffer_Dev buffer;

  if (decrypted_block_info.result == PP_DECRYPTRESULT_SUCCESS) {
    PP_DCHECK(decrypted_block.get() && decrypted_block->DecryptedBuffer());
    if (!decrypted_block.get() || !decrypted_block->DecryptedBuffer()) {
      PP_NOTREACHED();
      decrypted_block_info.result = PP_DECRYPTRESULT_DECRYPT_ERROR;
    } else {
      PpbBuffer* ppb_buffer =
          static_cast<PpbBuffer*>(decrypted_block->DecryptedBuffer());
      buffer = ppb_buffer->buffer_dev();
      decrypted_block_info.tracking_info.buffer_id = ppb_buffer->buffer_id();
      decrypted_block_info.data_size = ppb_buffer->Size();
    }
  }

  pp::ContentDecryptor_Private::DeliverBlock(buffer, decrypted_block_info);
}

void CdmAdapter::DecoderInitializeDone(int32_t result,
                                       PP_DecryptorStreamType decoder_type,
                                       uint32_t request_id,
                                       bool success) {
  PP_DCHECK(result == PP_OK);
  pp::ContentDecryptor_Private::DecoderInitializeDone(decoder_type,
                                                      request_id,
                                                      success);
}

void CdmAdapter::DecoderDeinitializeDone(int32_t result,
                                         PP_DecryptorStreamType decoder_type,
                                         uint32_t request_id) {
  pp::ContentDecryptor_Private::DecoderDeinitializeDone(decoder_type,
                                                        request_id);
}

void CdmAdapter::DecoderResetDone(int32_t result,
                                  PP_DecryptorStreamType decoder_type,
                                  uint32_t request_id) {
  pp::ContentDecryptor_Private::DecoderResetDone(decoder_type, request_id);
}

void CdmAdapter::DeliverFrame(
    int32_t result,
    const cdm::Status& status,
    const LinkedVideoFrame& video_frame,
    const PP_DecryptTrackingInfo& tracking_info) {
  PP_DCHECK(result == PP_OK);
  PP_DecryptedFrameInfo decrypted_frame_info;
  decrypted_frame_info.tracking_info.request_id = tracking_info.request_id;
  decrypted_frame_info.tracking_info.buffer_id = 0;
  decrypted_frame_info.result = CdmStatusToPpDecryptResult(status);

  pp::Buffer_Dev buffer;

  if (decrypted_frame_info.result == PP_DECRYPTRESULT_SUCCESS) {
    if (!IsValidVideoFrame(video_frame)) {
      PP_NOTREACHED();
      decrypted_frame_info.result = PP_DECRYPTRESULT_DECODE_ERROR;
    } else {
      PpbBuffer* ppb_buffer =
          static_cast<PpbBuffer*>(video_frame->FrameBuffer());

      buffer = ppb_buffer->buffer_dev();

      decrypted_frame_info.tracking_info.timestamp = video_frame->Timestamp();
      decrypted_frame_info.tracking_info.buffer_id = ppb_buffer->buffer_id();
      decrypted_frame_info.format =
          CdmVideoFormatToPpDecryptedFrameFormat(video_frame->Format());
      decrypted_frame_info.width = video_frame->Size().width;
      decrypted_frame_info.height = video_frame->Size().height;
      decrypted_frame_info.plane_offsets[PP_DECRYPTEDFRAMEPLANES_Y] =
          video_frame->PlaneOffset(cdm::VideoFrame::kYPlane);
      decrypted_frame_info.plane_offsets[PP_DECRYPTEDFRAMEPLANES_U] =
          video_frame->PlaneOffset(cdm::VideoFrame::kUPlane);
      decrypted_frame_info.plane_offsets[PP_DECRYPTEDFRAMEPLANES_V] =
          video_frame->PlaneOffset(cdm::VideoFrame::kVPlane);
      decrypted_frame_info.strides[PP_DECRYPTEDFRAMEPLANES_Y] =
          video_frame->Stride(cdm::VideoFrame::kYPlane);
      decrypted_frame_info.strides[PP_DECRYPTEDFRAMEPLANES_U] =
          video_frame->Stride(cdm::VideoFrame::kUPlane);
      decrypted_frame_info.strides[PP_DECRYPTEDFRAMEPLANES_V] =
          video_frame->Stride(cdm::VideoFrame::kVPlane);
    }
  }
  pp::ContentDecryptor_Private::DeliverFrame(buffer, decrypted_frame_info);
}

void CdmAdapter::DeliverSamples(int32_t result,
                                const cdm::Status& status,
                                const LinkedAudioFrames& audio_frames,
                                const PP_DecryptTrackingInfo& tracking_info) {
  PP_DCHECK(result == PP_OK);

  PP_DecryptedSampleInfo decrypted_sample_info;
  decrypted_sample_info.tracking_info = tracking_info;
  decrypted_sample_info.tracking_info.timestamp = 0;
  decrypted_sample_info.tracking_info.buffer_id = 0;
  decrypted_sample_info.data_size = 0;
  decrypted_sample_info.result = CdmStatusToPpDecryptResult(status);

  pp::Buffer_Dev buffer;

  if (decrypted_sample_info.result == PP_DECRYPTRESULT_SUCCESS) {
    PP_DCHECK(audio_frames.get() && audio_frames->FrameBuffer());
    if (!audio_frames.get() || !audio_frames->FrameBuffer()) {
      PP_NOTREACHED();
      decrypted_sample_info.result = PP_DECRYPTRESULT_DECRYPT_ERROR;
    } else {
      PpbBuffer* ppb_buffer =
          static_cast<PpbBuffer*>(audio_frames->FrameBuffer());
      buffer = ppb_buffer->buffer_dev();
      decrypted_sample_info.tracking_info.buffer_id = ppb_buffer->buffer_id();
      decrypted_sample_info.data_size = ppb_buffer->Size();
      decrypted_sample_info.format =
          CdmAudioFormatToPpDecryptedSampleFormat(audio_frames->Format());
    }
  }

  pp::ContentDecryptor_Private::DeliverSamples(buffer, decrypted_sample_info);
}

bool CdmAdapter::IsValidVideoFrame(const LinkedVideoFrame& video_frame) {
  if (!video_frame.get() ||
      !video_frame->FrameBuffer() ||
      (video_frame->Format() != cdm::kI420 &&
       video_frame->Format() != cdm::kYv12)) {
    CDM_DLOG() << "Invalid video frame!";
    return false;
  }

  PpbBuffer* ppb_buffer = static_cast<PpbBuffer*>(video_frame->FrameBuffer());

  for (uint32_t i = 0; i < cdm::VideoFrame::kMaxPlanes; ++i) {
    int plane_height = (i == cdm::VideoFrame::kYPlane) ?
        video_frame->Size().height : (video_frame->Size().height + 1) / 2;
    cdm::VideoFrame::VideoPlane plane =
        static_cast<cdm::VideoFrame::VideoPlane>(i);
    if (ppb_buffer->Size() < video_frame->PlaneOffset(plane) +
                             plane_height * video_frame->Stride(plane)) {
      return false;
    }
  }

  return true;
}

#if !defined(NDEBUG)
void CdmAdapter::LogToConsole(const pp::Var& value) {
  PP_DCHECK(IsMainThread());
  const PPB_Console* console = reinterpret_cast<const PPB_Console*>(
      pp::Module::Get()->GetBrowserInterface(PPB_CONSOLE_INTERFACE));
  console->Log(pp_instance(), PP_LOGLEVEL_LOG, value.pp_var());
}
#endif  // !defined(NDEBUG)

void CdmAdapter::SendPlatformChallenge(
    const char* service_id, uint32_t service_id_length,
    const char* challenge, uint32_t challenge_length) {
#if defined(OS_CHROMEOS)
  PP_DCHECK(!challenge_in_progress_);

  // Ensure member variables set by the callback are in a clean state.
  signed_data_output_ = pp::Var();
  signed_data_signature_output_ = pp::Var();
  platform_key_certificate_output_ = pp::Var();

  pp::VarArrayBuffer challenge_var(challenge_length);
  uint8_t* var_data = static_cast<uint8_t*>(challenge_var.Map());
  memcpy(var_data, challenge, challenge_length);

  std::string service_id_str(service_id, service_id_length);
  int32_t result = platform_verification_.ChallengePlatform(
      pp::Var(service_id_str), challenge_var, &signed_data_output_,
      &signed_data_signature_output_, &platform_key_certificate_output_,
      callback_factory_.NewCallback(&CdmAdapter::SendPlatformChallengeDone));
  challenge_var.Unmap();
  if (result == PP_OK_COMPLETIONPENDING) {
    challenge_in_progress_ = true;
    return;
  }

  // Fall through on error and issue an empty OnPlatformChallengeResponse().
  PP_DCHECK(result != PP_OK);
#endif

  cdm::PlatformChallengeResponse response = {};
  cdm_->OnPlatformChallengeResponse(response);
}

void CdmAdapter::EnableOutputProtection(uint32_t desired_protection_mask) {
#if defined(OS_CHROMEOS)
  int32_t result = output_protection_.EnableProtection(
      desired_protection_mask, callback_factory_.NewCallback(
          &CdmAdapter::EnableProtectionDone));

  // Errors are ignored since clients must call QueryOutputProtectionStatus() to
  // inspect the protection status on a regular basis.

  if (result != PP_OK && result != PP_OK_COMPLETIONPENDING)
    CDM_DLOG() << __FUNCTION__ << " failed!";
#endif
}

void CdmAdapter::QueryOutputProtectionStatus() {
#if defined(OS_CHROMEOS)
  PP_DCHECK(!query_output_protection_in_progress_);

  output_link_mask_ = output_protection_mask_ = 0;
  const int32_t result = output_protection_.QueryStatus(
      &output_link_mask_,
      &output_protection_mask_,
      callback_factory_.NewCallback(
          &CdmAdapter::QueryOutputProtectionStatusDone));
  if (result == PP_OK_COMPLETIONPENDING) {
    query_output_protection_in_progress_ = true;
    return;
  }

  // Fall through on error and issue an empty OnQueryOutputProtectionStatus().
  PP_DCHECK(result != PP_OK);
#endif

  cdm_->OnQueryOutputProtectionStatus(0, 0);
}

void CdmAdapter::OnDeferredInitializationDone(cdm::StreamType stream_type,
                                              cdm::Status decoder_status) {
  switch (stream_type) {
    case cdm::kStreamTypeAudio:
      PP_DCHECK(deferred_initialize_audio_decoder_);
      CallOnMain(
          callback_factory_.NewCallback(&CdmAdapter::DecoderInitializeDone,
                                        PP_DECRYPTORSTREAMTYPE_AUDIO,
                                        deferred_audio_decoder_config_id_,
                                        decoder_status == cdm::kSuccess));
      deferred_initialize_audio_decoder_ = false;
      deferred_audio_decoder_config_id_ = 0;
      break;
    case cdm::kStreamTypeVideo:
      PP_DCHECK(deferred_initialize_video_decoder_);
      CallOnMain(
          callback_factory_.NewCallback(&CdmAdapter::DecoderInitializeDone,
                                        PP_DECRYPTORSTREAMTYPE_VIDEO,
                                        deferred_video_decoder_config_id_,
                                        decoder_status == cdm::kSuccess));
      deferred_initialize_video_decoder_ = false;
      deferred_video_decoder_config_id_ = 0;
      break;
  }
}

// The CDM owns the returned object and must call FileIO::Close() to release it.
cdm::FileIO* CdmAdapter::CreateFileIO(cdm::FileIOClient* client) {
  return new CdmFileIOImpl(client, pp_instance());
}

#if defined(OS_CHROMEOS)
void CdmAdapter::SendPlatformChallengeDone(int32_t result) {
  challenge_in_progress_ = false;

  if (result != PP_OK) {
    CDM_DLOG() << __FUNCTION__ << ": Platform challenge failed!";
    cdm::PlatformChallengeResponse response = {};
    cdm_->OnPlatformChallengeResponse(response);
    return;
  }

  pp::VarArrayBuffer signed_data_var(signed_data_output_);
  pp::VarArrayBuffer signed_data_signature_var(signed_data_signature_output_);
  std::string platform_key_certificate_string =
      platform_key_certificate_output_.AsString();

  cdm::PlatformChallengeResponse response = {
    static_cast<uint8_t*>(signed_data_var.Map()),
    signed_data_var.ByteLength(),

    static_cast<uint8_t*>(signed_data_signature_var.Map()),
    signed_data_signature_var.ByteLength(),

    reinterpret_cast<const uint8_t*>(platform_key_certificate_string.c_str()),
    static_cast<uint32_t>(platform_key_certificate_string.length())
  };
  cdm_->OnPlatformChallengeResponse(response);

  signed_data_var.Unmap();
  signed_data_signature_var.Unmap();
}

void CdmAdapter::EnableProtectionDone(int32_t result) {
  // Does nothing since clients must call QueryOutputProtectionStatus() to
  // inspect the protection status on a regular basis.
  CDM_DLOG() << __FUNCTION__ << " : " << result;
}

void CdmAdapter::QueryOutputProtectionStatusDone(int32_t result) {
  PP_DCHECK(query_output_protection_in_progress_);
  query_output_protection_in_progress_ = false;

  // Return a protection status of none on error.
  if (result != PP_OK)
    output_link_mask_ = output_protection_mask_ = 0;

  cdm_->OnQueryOutputProtectionStatus(output_link_mask_,
                                      output_protection_mask_);
}
#endif

void* GetCdmHost(int host_interface_version, void* user_data) {
  if (!host_interface_version || !user_data)
    return NULL;

  COMPILE_ASSERT(cdm::ContentDecryptionModule::Host::kVersion ==
                 cdm::ContentDecryptionModule_4::Host::kVersion,
                 update_code_below);

  // Ensure IsSupportedCdmHostVersion matches implementation of this function.
  // Always update this DCHECK when updating this function.
  // If this check fails, update this function and DCHECK or update
  // IsSupportedCdmHostVersion.
  PP_DCHECK(
      // Future version is not supported.
      !IsSupportedCdmHostVersion(
          cdm::ContentDecryptionModule::Host::kVersion + 1) &&
      // Current version is supported.
      IsSupportedCdmHostVersion(cdm::ContentDecryptionModule::Host::kVersion) &&
      // Include all previous supported versions here.
      IsSupportedCdmHostVersion(cdm::Host_1::kVersion) &&
      // One older than the oldest supported version is not supported.
      !IsSupportedCdmHostVersion(cdm::Host_1::kVersion - 1));
  PP_DCHECK(IsSupportedCdmHostVersion(host_interface_version));

  CdmAdapter* cdm_adapter = static_cast<CdmAdapter*>(user_data);
  CDM_DLOG() << "Create CDM Host with version " << host_interface_version;
  switch (host_interface_version) {
    case cdm::Host_4::kVersion:
      return static_cast<cdm::Host_4*>(cdm_adapter);
    case cdm::Host_2::kVersion:
      return static_cast<cdm::Host_2*>(cdm_adapter);
    case cdm::Host_1::kVersion:
      return static_cast<cdm::Host_1*>(cdm_adapter);
    default:
      PP_NOTREACHED();
      return NULL;
  }
}

// This object is the global object representing this plugin library as long
// as it is loaded.
class CdmAdapterModule : public pp::Module {
 public:
  CdmAdapterModule() : pp::Module() {
    // This function blocks the renderer thread (PluginInstance::Initialize()).
    // Move this call to other places if this may be a concern in the future.
    INITIALIZE_CDM_MODULE();
  }
  virtual ~CdmAdapterModule() {
    DeinitializeCdmModule();
  }

  virtual pp::Instance* CreateInstance(PP_Instance instance) {
    return new CdmAdapter(instance, this);
  }

 private:
  CdmFileIOImpl::ResourceTracker cdm_file_io_impl_resource_tracker;
};

}  // namespace media

namespace pp {

// Factory function for your specialization of the Module object.
Module* CreateModule() {
  return new media::CdmAdapterModule();
}

}  // namespace pp
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root/media/cdm/ppapi/cdm_adapter.cc

DEFINITIONS
