chrome/renderer/media/chrome_key_systems.cc - platform/external/chromium_org - Git at Google

 // 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 "chrome/renderer/media/chrome_key_systems.h"

 #include <string>

 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_split.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/render_messages.h"
 #include "content/public/renderer/render_thread.h"

 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.

 // The following must be after widevine_cdm_version.h.

 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
 #include <gnu/libc-version.h>
 #include "base/version.h"
 #endif

 #if defined(OS_ANDROID)
 #include "chrome/common/encrypted_media_messages_android.h"
 #endif

 using content::KeySystemInfo;

 const char kAudioWebM[] = "audio/webm";
 const char kVideoWebM[] = "video/webm";
 const char kVorbis[] = "vorbis";
 const char kVorbisVP8[] = "vorbis,vp8,vp8.0";

 #if defined(USE_PROPRIETARY_CODECS)
 const char kAudioMp4[] = "audio/mp4";
 const char kVideoMp4[] = "video/mp4";
 const char kMp4a[] = "mp4a";
 #if defined(WIDEVINE_CDM_AVAILABLE)
 const char kAvc1Avc3[] = "avc1,avc3";
 #endif  // WIDEVINE_CDM_AVAILABLE
 const char kMp4aAvc1Avc3[] = "mp4a,avc1,avc3";
 #endif  // defined(USE_PROPRIETARY_CODECS)

 #if defined(ENABLE_PEPPER_CDMS)
 static bool IsPepperCdmRegistered(
     const std::string& pepper_type,
     std::vector<base::string16>* additional_param_names,
     std::vector<base::string16>* additional_param_values) {
   bool is_registered = false;
   content::RenderThread::Get()->Send(
       new ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType(
           pepper_type,
           &is_registered,
           additional_param_names,
           additional_param_values));

   return is_registered;
 }

 // External Clear Key (used for testing).
 static void AddExternalClearKey(
     std::vector<KeySystemInfo>* concrete_key_systems) {
   static const char kExternalClearKeyKeySystem[] =
       "org.chromium.externalclearkey";
   static const char kExternalClearKeyPepperType[] =
       "application/x-ppapi-clearkey-cdm";

   std::vector<base::string16> additional_param_names;
   std::vector<base::string16> additional_param_values;
   if (!IsPepperCdmRegistered(kExternalClearKeyPepperType,
                              &additional_param_names,
                              &additional_param_values)) {
     return;
   }

   KeySystemInfo info(kExternalClearKeyKeySystem);

   info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
   info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
 #if defined(USE_PROPRIETARY_CODECS)
   info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
   info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1Avc3));
 #endif  // defined(USE_PROPRIETARY_CODECS)
   info.pepper_type = kExternalClearKeyPepperType;

   concrete_key_systems->push_back(info);

   // A key system that Chrome thinks is supported by ClearKeyCdm, but actually
   // will be refused by ClearKeyCdm. This is to test the CDM initialization
   // failure case.
   info.key_system += ".initializefail";
   concrete_key_systems->push_back(info);
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)


 #if defined(WIDEVINE_CDM_AVAILABLE)
 enum WidevineCdmType {
   WIDEVINE,
   WIDEVINE_HR,
 #if defined(OS_ANDROID)
   WIDEVINE_HR_NON_COMPOSITING,
 #endif
 };

 // Defines bitmask values used to specify supported codecs.
 // Each value represents a codec within a specific container.
 // The mask values are stored in a SupportedCodecs.
 typedef uint32 SupportedCodecs;
 enum SupportedCodecMasks {
   NO_CODECS = 0,
   WEBM_VP8_AND_VORBIS = 1 << 0,
 #if defined(USE_PROPRIETARY_CODECS)
   MP4_AAC = 1 << 1,
   MP4_AVC1 = 1 << 2,
 #endif  // defined(USE_PROPRIETARY_CODECS)
 };

 #if defined(OS_ANDROID)
 #define COMPILE_ASSERT_MATCHING_ENUM(name) \
   COMPILE_ASSERT(static_cast<int>(name) == \
                  static_cast<int>(android::name), \
                  mismatching_enums)
 COMPILE_ASSERT_MATCHING_ENUM(WEBM_VP8_AND_VORBIS);
 COMPILE_ASSERT_MATCHING_ENUM(MP4_AAC);
 COMPILE_ASSERT_MATCHING_ENUM(MP4_AVC1);
 #undef COMPILE_ASSERT_MATCHING_ENUM

 static const uint8 kWidevineUuid[16] = {
     0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,
     0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED };
 #else
 static bool IsWidevineHrSupported() {
   // TODO(jrummell): Need to call CheckPlatformState() but it is
   // asynchronous, and needs to be done in the browser.
   return false;
 }
 #endif

 // Return |name|'s parent key system.
 static std::string GetDirectParentName(std::string name) {
   int last_period = name.find_last_of('.');
   DCHECK_GT(last_period, 0);
   return name.substr(0, last_period);
 }

 static void AddWidevineWithCodecs(
     WidevineCdmType widevine_cdm_type,
     SupportedCodecs supported_codecs,
     std::vector<KeySystemInfo>* concrete_key_systems) {

   KeySystemInfo info(kWidevineKeySystem);

   switch (widevine_cdm_type) {
     case WIDEVINE:
       // For standard Widevine, add parent name.
       info.parent_key_system = GetDirectParentName(kWidevineKeySystem);
       break;
     case WIDEVINE_HR:
       info.key_system.append(".hr");
       break;
 #if defined(OS_ANDROID)
     case WIDEVINE_HR_NON_COMPOSITING:
       info.key_system.append(".hrnoncompositing");
       break;
 #endif
     default:
       NOTREACHED();
   }

   if (supported_codecs & WEBM_VP8_AND_VORBIS) {
     info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
     info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
   }

 #if defined(USE_PROPRIETARY_CODECS)
   if (supported_codecs & MP4_AAC)
     info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));

   if (supported_codecs & MP4_AVC1) {
     const char* video_codecs =
         (supported_codecs & MP4_AAC) ? kMp4aAvc1Avc3 : kAvc1Avc3;
     info.supported_types.push_back(std::make_pair(kVideoMp4, video_codecs));
   }
 #endif  // defined(USE_PROPRIETARY_CODECS)

 #if defined(ENABLE_PEPPER_CDMS)
   info.pepper_type = kWidevineCdmPluginMimeType;
 #elif defined(OS_ANDROID)
   info.uuid.assign(kWidevineUuid, kWidevineUuid + arraysize(kWidevineUuid));
 #endif  // defined(ENABLE_PEPPER_CDMS)

   concrete_key_systems->push_back(info);
 }

 #if defined(ENABLE_PEPPER_CDMS)
 // When the adapter is registered, a name-value pair is inserted in
 // additional_param_* that lists the supported codecs. The name is "codecs" and
 // the value is a comma-delimited list of codecs.
 // This function finds "codecs" and parses the value into the vector |codecs|.
 // Converts the codec strings to UTF-8 since we only expect ASCII strings and
 // this simplifies the rest of the code in this file.
 void GetSupportedCodecs(
     const std::vector<base::string16>& additional_param_names,
     const std::vector<base::string16>& additional_param_values,
     std::vector<std::string>* codecs) {
   DCHECK(codecs->empty());
   DCHECK_EQ(additional_param_names.size(), additional_param_values.size());
   for (size_t i = 0; i < additional_param_names.size(); ++i) {
     if (additional_param_names[i] ==
         base::ASCIIToUTF16(kCdmSupportedCodecsParamName)) {
       const base::string16& codecs_string16 = additional_param_values[i];
       std::string codecs_string;
       if (!base::UTF16ToUTF8(codecs_string16.c_str(),
                              codecs_string16.length(),
                              &codecs_string)) {
         DLOG(WARNING) << "Non-UTF-8 codecs string.";
         // Continue using the best effort conversion.
       }
       base::SplitString(codecs_string,
                         kCdmSupportedCodecsValueDelimiter,
                         codecs);
       break;
     }
   }
 }

 static void AddPepperBasedWidevine(
     std::vector<KeySystemInfo>* concrete_key_systems) {
 #if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
   Version glibc_version(gnu_get_libc_version());
   DCHECK(glibc_version.IsValid());
   if (glibc_version.IsOlderThan(WIDEVINE_CDM_MIN_GLIBC_VERSION))
     return;
 #endif  // defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)

   std::vector<base::string16> additional_param_names;
   std::vector<base::string16> additional_param_values;
   if (!IsPepperCdmRegistered(kWidevineCdmPluginMimeType,
                              &additional_param_names,
                              &additional_param_values)) {
     DVLOG(1) << "Widevine CDM is not currently available.";
     return;
   }

   std::vector<std::string> codecs;
   GetSupportedCodecs(additional_param_names, additional_param_values, &codecs);

   SupportedCodecs supported_codecs = NO_CODECS;
   for (size_t i = 0; i < codecs.size(); ++i) {
     // TODO(ddorwin): Break up VP8 and Vorbis. For now, "vp8" implies both.
     if (codecs[i] == kCdmSupportedCodecVp8)
       supported_codecs |= WEBM_VP8_AND_VORBIS;
 #if defined(USE_PROPRIETARY_CODECS)
     if (codecs[i] == kCdmSupportedCodecAac)
       supported_codecs |= MP4_AAC;
     if (codecs[i] == kCdmSupportedCodecAvc1)
       supported_codecs |= MP4_AVC1;
 #endif  // defined(USE_PROPRIETARY_CODECS)
   }

   AddWidevineWithCodecs(WIDEVINE, supported_codecs, concrete_key_systems);

   if (IsWidevineHrSupported())
     AddWidevineWithCodecs(WIDEVINE_HR, supported_codecs, concrete_key_systems);
 }
 #elif defined(OS_ANDROID)
 static void AddAndroidWidevine(
     std::vector<KeySystemInfo>* concrete_key_systems) {
   SupportedKeySystemRequest request;
   SupportedKeySystemResponse response;

   request.uuid.insert(request.uuid.begin(), kWidevineUuid,
                       kWidevineUuid + arraysize(kWidevineUuid));
 #if defined(USE_PROPRIETARY_CODECS)
   request.codecs = static_cast<android::SupportedCodecs>(
       android::MP4_AAC | android::MP4_AVC1);
 #endif  // defined(USE_PROPRIETARY_CODECS)
   content::RenderThread::Get()->Send(
       new ChromeViewHostMsg_GetSupportedKeySystems(request, &response));
   DCHECK_EQ(response.compositing_codecs >> 3, 0) << "unrecognized codec";
   DCHECK_EQ(response.non_compositing_codecs >> 3, 0) << "unrecognized codec";
   if (response.compositing_codecs != android::NO_SUPPORTED_CODECS) {
     AddWidevineWithCodecs(
         WIDEVINE,
         static_cast<SupportedCodecs>(response.compositing_codecs),
         concrete_key_systems);
   }

   if (response.non_compositing_codecs != android::NO_SUPPORTED_CODECS) {
     AddWidevineWithCodecs(
         WIDEVINE_HR_NON_COMPOSITING,
         static_cast<SupportedCodecs>(response.non_compositing_codecs),
         concrete_key_systems);
   }
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)
 #endif  // defined(WIDEVINE_CDM_AVAILABLE)

 void AddChromeKeySystems(std::vector<KeySystemInfo>* key_systems_info) {
 #if defined(ENABLE_PEPPER_CDMS)
   AddExternalClearKey(key_systems_info);
 #endif

 #if defined(WIDEVINE_CDM_AVAILABLE)
 #if defined(ENABLE_PEPPER_CDMS)
   AddPepperBasedWidevine(key_systems_info);
 #elif defined(OS_ANDROID)
   AddAndroidWidevine(key_systems_info);
 #endif
 #endif
 }
	// 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 "chrome/renderer/media/chrome_key_systems.h"

	#include <string>

	#include "base/logging.h"
	#include "base/strings/string16.h"
	#include "base/strings/string_split.h"
	#include "base/strings/utf_string_conversions.h"
	#include "chrome/common/render_messages.h"
	#include "content/public/renderer/render_thread.h"

	#include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.

	// The following must be after widevine_cdm_version.h.

	#if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
	#include <gnu/libc-version.h>
	#include "base/version.h"
	#endif

	#if defined(OS_ANDROID)
	#include "chrome/common/encrypted_media_messages_android.h"
	#endif

	using content::KeySystemInfo;

	const char kAudioWebM[] = "audio/webm";
	const char kVideoWebM[] = "video/webm";
	const char kVorbis[] = "vorbis";
	const char kVorbisVP8[] = "vorbis,vp8,vp8.0";

	#if defined(USE_PROPRIETARY_CODECS)
	const char kAudioMp4[] = "audio/mp4";
	const char kVideoMp4[] = "video/mp4";
	const char kMp4a[] = "mp4a";
	#if defined(WIDEVINE_CDM_AVAILABLE)
	const char kAvc1Avc3[] = "avc1,avc3";
	#endif // WIDEVINE_CDM_AVAILABLE
	const char kMp4aAvc1Avc3[] = "mp4a,avc1,avc3";
	#endif // defined(USE_PROPRIETARY_CODECS)

	#if defined(ENABLE_PEPPER_CDMS)
	static bool IsPepperCdmRegistered(
	const std::string& pepper_type,
	std::vector<base::string16>* additional_param_names,
	std::vector<base::string16>* additional_param_values) {
	bool is_registered = false;
	content::RenderThread::Get()->Send(
	new ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType(
	pepper_type,
	&is_registered,
	additional_param_names,
	additional_param_values));

	return is_registered;
	}

	// External Clear Key (used for testing).
	static void AddExternalClearKey(
	std::vector<KeySystemInfo>* concrete_key_systems) {
	static const char kExternalClearKeyKeySystem[] =
	"org.chromium.externalclearkey";
	static const char kExternalClearKeyPepperType[] =
	"application/x-ppapi-clearkey-cdm";

	std::vector<base::string16> additional_param_names;
	std::vector<base::string16> additional_param_values;
	if (!IsPepperCdmRegistered(kExternalClearKeyPepperType,
	&additional_param_names,
	&additional_param_values)) {
	return;
	}

	KeySystemInfo info(kExternalClearKeyKeySystem);

	info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
	info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
	#if defined(USE_PROPRIETARY_CODECS)
	info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
	info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1Avc3));
	#endif // defined(USE_PROPRIETARY_CODECS)
	info.pepper_type = kExternalClearKeyPepperType;

	concrete_key_systems->push_back(info);

	// A key system that Chrome thinks is supported by ClearKeyCdm, but actually
	// will be refused by ClearKeyCdm. This is to test the CDM initialization
	// failure case.
	info.key_system += ".initializefail";
	concrete_key_systems->push_back(info);
	}
	#endif // defined(ENABLE_PEPPER_CDMS)


	#if defined(WIDEVINE_CDM_AVAILABLE)
	enum WidevineCdmType {
	WIDEVINE,
	WIDEVINE_HR,
	#if defined(OS_ANDROID)
	WIDEVINE_HR_NON_COMPOSITING,
	#endif
	};

	// Defines bitmask values used to specify supported codecs.
	// Each value represents a codec within a specific container.
	// The mask values are stored in a SupportedCodecs.
	typedef uint32 SupportedCodecs;
	enum SupportedCodecMasks {
	NO_CODECS = 0,
	WEBM_VP8_AND_VORBIS = 1 << 0,
	#if defined(USE_PROPRIETARY_CODECS)
	MP4_AAC = 1 << 1,
	MP4_AVC1 = 1 << 2,
	#endif // defined(USE_PROPRIETARY_CODECS)
	};

	#if defined(OS_ANDROID)
	#define COMPILE_ASSERT_MATCHING_ENUM(name) \
	COMPILE_ASSERT(static_cast<int>(name) == \
	static_cast<int>(android::name), \
	mismatching_enums)
	COMPILE_ASSERT_MATCHING_ENUM(WEBM_VP8_AND_VORBIS);
	COMPILE_ASSERT_MATCHING_ENUM(MP4_AAC);
	COMPILE_ASSERT_MATCHING_ENUM(MP4_AVC1);
	#undef COMPILE_ASSERT_MATCHING_ENUM

	static const uint8 kWidevineUuid[16] = {
	0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,
	0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED };
	#else
	static bool IsWidevineHrSupported() {
	// TODO(jrummell): Need to call CheckPlatformState() but it is
	// asynchronous, and needs to be done in the browser.
	return false;
	}
	#endif

	// Return \|name\|'s parent key system.
	static std::string GetDirectParentName(std::string name) {
	int last_period = name.find_last_of('.');
	DCHECK_GT(last_period, 0);
	return name.substr(0, last_period);
	}

	static void AddWidevineWithCodecs(
	WidevineCdmType widevine_cdm_type,
	SupportedCodecs supported_codecs,
	std::vector<KeySystemInfo>* concrete_key_systems) {

	KeySystemInfo info(kWidevineKeySystem);

	switch (widevine_cdm_type) {
	case WIDEVINE:
	// For standard Widevine, add parent name.
	info.parent_key_system = GetDirectParentName(kWidevineKeySystem);
	break;
	case WIDEVINE_HR:
	info.key_system.append(".hr");
	break;
	#if defined(OS_ANDROID)
	case WIDEVINE_HR_NON_COMPOSITING:
	info.key_system.append(".hrnoncompositing");
	break;
	#endif
	default:
	NOTREACHED();
	}

	if (supported_codecs & WEBM_VP8_AND_VORBIS) {
	info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
	info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
	}

	#if defined(USE_PROPRIETARY_CODECS)
	if (supported_codecs & MP4_AAC)
	info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));

	if (supported_codecs & MP4_AVC1) {
	const char* video_codecs =
	(supported_codecs & MP4_AAC) ? kMp4aAvc1Avc3 : kAvc1Avc3;
	info.supported_types.push_back(std::make_pair(kVideoMp4, video_codecs));
	}
	#endif // defined(USE_PROPRIETARY_CODECS)

	#if defined(ENABLE_PEPPER_CDMS)
	info.pepper_type = kWidevineCdmPluginMimeType;
	#elif defined(OS_ANDROID)
	info.uuid.assign(kWidevineUuid, kWidevineUuid + arraysize(kWidevineUuid));
	#endif // defined(ENABLE_PEPPER_CDMS)

	concrete_key_systems->push_back(info);
	}

	#if defined(ENABLE_PEPPER_CDMS)
	// When the adapter is registered, a name-value pair is inserted in
	// additional_param_* that lists the supported codecs. The name is "codecs" and
	// the value is a comma-delimited list of codecs.
	// This function finds "codecs" and parses the value into the vector \|codecs\|.
	// Converts the codec strings to UTF-8 since we only expect ASCII strings and
	// this simplifies the rest of the code in this file.
	void GetSupportedCodecs(
	const std::vector<base::string16>& additional_param_names,
	const std::vector<base::string16>& additional_param_values,
	std::vector<std::string>* codecs) {
	DCHECK(codecs->empty());
	DCHECK_EQ(additional_param_names.size(), additional_param_values.size());
	for (size_t i = 0; i < additional_param_names.size(); ++i) {
	if (additional_param_names[i] ==
	base::ASCIIToUTF16(kCdmSupportedCodecsParamName)) {
	const base::string16& codecs_string16 = additional_param_values[i];
	std::string codecs_string;
	if (!base::UTF16ToUTF8(codecs_string16.c_str(),
	codecs_string16.length(),
	&codecs_string)) {
	DLOG(WARNING) << "Non-UTF-8 codecs string.";
	// Continue using the best effort conversion.
	}
	base::SplitString(codecs_string,
	kCdmSupportedCodecsValueDelimiter,
	codecs);
	break;
	}
	}
	}

	static void AddPepperBasedWidevine(
	std::vector<KeySystemInfo>* concrete_key_systems) {
	#if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
	Version glibc_version(gnu_get_libc_version());
	DCHECK(glibc_version.IsValid());
	if (glibc_version.IsOlderThan(WIDEVINE_CDM_MIN_GLIBC_VERSION))
	return;
	#endif // defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)

	std::vector<base::string16> additional_param_names;
	std::vector<base::string16> additional_param_values;
	if (!IsPepperCdmRegistered(kWidevineCdmPluginMimeType,
	&additional_param_names,
	&additional_param_values)) {
	DVLOG(1) << "Widevine CDM is not currently available.";
	return;
	}

	std::vector<std::string> codecs;
	GetSupportedCodecs(additional_param_names, additional_param_values, &codecs);

	SupportedCodecs supported_codecs = NO_CODECS;
	for (size_t i = 0; i < codecs.size(); ++i) {
	// TODO(ddorwin): Break up VP8 and Vorbis. For now, "vp8" implies both.
	if (codecs[i] == kCdmSupportedCodecVp8)
	supported_codecs \|= WEBM_VP8_AND_VORBIS;
	#if defined(USE_PROPRIETARY_CODECS)
	if (codecs[i] == kCdmSupportedCodecAac)
	supported_codecs \|= MP4_AAC;
	if (codecs[i] == kCdmSupportedCodecAvc1)
	supported_codecs \|= MP4_AVC1;
	#endif // defined(USE_PROPRIETARY_CODECS)
	}

	AddWidevineWithCodecs(WIDEVINE, supported_codecs, concrete_key_systems);

	if (IsWidevineHrSupported())
	AddWidevineWithCodecs(WIDEVINE_HR, supported_codecs, concrete_key_systems);
	}
	#elif defined(OS_ANDROID)
	static void AddAndroidWidevine(
	std::vector<KeySystemInfo>* concrete_key_systems) {
	SupportedKeySystemRequest request;
	SupportedKeySystemResponse response;

	request.uuid.insert(request.uuid.begin(), kWidevineUuid,
	kWidevineUuid + arraysize(kWidevineUuid));
	#if defined(USE_PROPRIETARY_CODECS)
	request.codecs = static_cast<android::SupportedCodecs>(
	android::MP4_AAC \| android::MP4_AVC1);
	#endif // defined(USE_PROPRIETARY_CODECS)
	content::RenderThread::Get()->Send(
	new ChromeViewHostMsg_GetSupportedKeySystems(request, &response));
	DCHECK_EQ(response.compositing_codecs >> 3, 0) << "unrecognized codec";
	DCHECK_EQ(response.non_compositing_codecs >> 3, 0) << "unrecognized codec";
	if (response.compositing_codecs != android::NO_SUPPORTED_CODECS) {
	AddWidevineWithCodecs(
	WIDEVINE,
	static_cast<SupportedCodecs>(response.compositing_codecs),
	concrete_key_systems);
	}

	if (response.non_compositing_codecs != android::NO_SUPPORTED_CODECS) {
	AddWidevineWithCodecs(
	WIDEVINE_HR_NON_COMPOSITING,
	static_cast<SupportedCodecs>(response.non_compositing_codecs),
	concrete_key_systems);
	}
	}
	#endif // defined(ENABLE_PEPPER_CDMS)
	#endif // defined(WIDEVINE_CDM_AVAILABLE)

	void AddChromeKeySystems(std::vector<KeySystemInfo>* key_systems_info) {
	#if defined(ENABLE_PEPPER_CDMS)
	AddExternalClearKey(key_systems_info);
	#endif

	#if defined(WIDEVINE_CDM_AVAILABLE)
	#if defined(ENABLE_PEPPER_CDMS)
	AddPepperBasedWidevine(key_systems_info);
	#elif defined(OS_ANDROID)
	AddAndroidWidevine(key_systems_info);
	#endif
	#endif
	}