chromium/media/cdm/cdm_module.cc

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/cdm/cdm_module.h"

#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram_macros.h"
#include "base/notreached.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "components/crash/core/common/crash_key.h"
#include "load_cdm_uma_helper.h"

#if BUILDFLAG(ENABLE_CDM_HOST_VERIFICATION)
#include "base/feature_list.h"
#include "media/base/media_switches.h"
#include "media/cdm/cdm_host_files.h"
#endif  // BUILDFLAG(ENABLE_CDM_HOST_VERIFICATION)

// INITIALIZE_CDM_MODULE is a macro in api/content_decryption_module.h.
// However, we need to pass it as a string to GetFunctionPointer(). The follow
// macro helps expanding it into a string.
#define STRINGIFY(X) …
#define MAKE_STRING(X) …

namespace media {

namespace {

static CdmModule* g_cdm_module = …;

// UMA report prefix
const char kUmaPrefix[] = …;

#if BUILDFLAG(ENABLE_CDM_HOST_VERIFICATION)
void InitCdmHostVerification(
    base::NativeLibrary cdm_library,
    const base::FilePath& cdm_path,
    const std::vector<CdmHostFilePath>& cdm_host_file_paths) {
  DCHECK(cdm_library);

  CdmHostFiles cdm_host_files;
  cdm_host_files.Initialize(cdm_path, cdm_host_file_paths);

  auto status = cdm_host_files.InitVerification(cdm_library);

  UMA_HISTOGRAM_ENUMERATION("Media.EME.CdmHostVerificationStatus", status,
                            CdmHostFiles::Status::kStatusCount);
}
#endif  // BUILDFLAG(ENABLE_CDM_HOST_VERIFICATION)

}  // namespace

// static
CdmModule* CdmModule::GetInstance() { … }

// static
void CdmModule::ResetInstanceForTesting() { … }

CdmModule::CdmModule() = default;

CdmModule::~CdmModule() { … }

CdmModule::CreateCdmFunc CdmModule::GetCreateCdmFunc() { … }

#if BUILDFLAG(ENABLE_CDM_HOST_VERIFICATION)
bool CdmModule::Initialize(const base::FilePath& cdm_path,
                           std::vector<CdmHostFilePath> cdm_host_file_paths) {
#else
bool CdmModule::Initialize(const base::FilePath& cdm_path) { … }

void CdmModule::InitializeCdmModule() { … }

}  // namespace media