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// Copyright 2014 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 "components/cdm/browser/cdm_message_filter_android.h"
#include <stddef.h>
#include <string>
#include <vector>
#include "base/feature_list.h"
#include "base/macros.h"
#include "components/cdm/common/cdm_messages_android.h"
#include "content/public/browser/android/android_overlay_provider.h"
#include "content/public/browser/browser_thread.h"
#include "ipc/ipc_message_macros.h"
#include "media/base/android/media_codec_util.h"
#include "media/base/android/media_drm_bridge.h"
#include "media/base/audio_codecs.h"
#include "media/base/media_switches.h"
#include "media/base/video_codecs.h"
#include "media/media_features.h"
using content::BrowserThread;
using media::MediaDrmBridge;
using media::SupportedCodecs;
namespace cdm {
const size_t kMaxKeySystemLength = 256;
template <typename CodecType>
struct CodecInfo {
SupportedCodecs eme_codec;
CodecType codec;
const char* container_mime_type;
};
const CodecInfo<media::VideoCodec> kVideoCodecsToQuery[] = {
{media::EME_CODEC_WEBM_VP8, media::kCodecVP8, "video/webm"},
{media::EME_CODEC_WEBM_VP9, media::kCodecVP9, "video/webm"},
#if BUILDFLAG(USE_PROPRIETARY_CODECS)
{media::EME_CODEC_MP4_AVC1, media::kCodecH264, "video/mp4"},
#if BUILDFLAG(ENABLE_HEVC_DEMUXING)
{media::EME_CODEC_MP4_HEVC, media::kCodecHEVC, "video/mp4"},
#endif
#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
{media::EME_CODEC_MP4_DV_AVC, media::kCodecDolbyVision, "video/mp4"},
#if BUILDFLAG(ENABLE_HEVC_DEMUXING)
{media::EME_CODEC_MP4_DV_HEVC, media::kCodecDolbyVision, "video/mp4"},
#endif
#endif
#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
};
const CodecInfo<media::AudioCodec> kAudioCodecsToQuery[] = {
// Vorbis is not supported. See http://crbug.com/710924 for details.
{media::EME_CODEC_WEBM_OPUS, media::kCodecOpus, "video/webm"},
#if BUILDFLAG(USE_PROPRIETARY_CODECS)
{media::EME_CODEC_MP4_AAC, media::kCodecAAC, "video/mp4"},
#if BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
{media::EME_CODEC_MP4_AC3, media::kCodecAC3, "video/mp4"},
{media::EME_CODEC_MP4_EAC3, media::kCodecEAC3, "video/mp4"},
#endif
#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
};
static SupportedCodecs GetSupportedCodecs(
const SupportedKeySystemRequest& request,
bool is_secure) {
const std::string& key_system = request.key_system;
SupportedCodecs supported_codecs = media::EME_CODEC_NONE;
for (const auto& info : kVideoCodecsToQuery) {
if ((request.codecs & info.eme_codec) &&
MediaDrmBridge::IsKeySystemSupportedWithType(
key_system, info.container_mime_type) &&
media::MediaCodecUtil::CanDecode(info.codec, is_secure)) {
supported_codecs |= info.eme_codec;
}
}
for (const auto& info : kAudioCodecsToQuery) {
if ((request.codecs & info.eme_codec) &&
MediaDrmBridge::IsKeySystemSupportedWithType(
key_system, info.container_mime_type) &&
media::MediaCodecUtil::CanDecode(info.codec)) {
supported_codecs |= info.eme_codec;
}
}
return supported_codecs;
}
CdmMessageFilterAndroid::CdmMessageFilterAndroid(bool can_use_secure_codecs)
: BrowserMessageFilter(EncryptedMediaMsgStart),
force_to_support_secure_codecs_(can_use_secure_codecs) {}
CdmMessageFilterAndroid::~CdmMessageFilterAndroid() {}
bool CdmMessageFilterAndroid::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(CdmMessageFilterAndroid, message)
IPC_MESSAGE_HANDLER(ChromeViewHostMsg_QueryKeySystemSupport,
OnQueryKeySystemSupport)
IPC_MESSAGE_HANDLER(ChromeViewHostMsg_GetPlatformKeySystemNames,
OnGetPlatformKeySystemNames)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void CdmMessageFilterAndroid::OverrideThreadForMessage(
const IPC::Message& message, BrowserThread::ID* thread) {
// Move the IPC handling to FILE thread as it is not very cheap.
if (message.type() == ChromeViewHostMsg_QueryKeySystemSupport::ID)
*thread = BrowserThread::FILE;
}
void CdmMessageFilterAndroid::OnQueryKeySystemSupport(
const SupportedKeySystemRequest& request,
SupportedKeySystemResponse* response) {
if (!response) {
NOTREACHED() << "NULL response pointer provided.";
return;
}
if (request.key_system.size() > kMaxKeySystemLength) {
NOTREACHED() << "Invalid key system: " << request.key_system;
return;
}
if (!MediaDrmBridge::IsKeySystemSupported(request.key_system))
return;
DCHECK(request.codecs & media::EME_CODEC_ALL) << "unrecognized codec";
response->key_system = request.key_system;
response->non_secure_codecs = GetSupportedCodecs(request, false);
bool are_overlay_supported =
content::AndroidOverlayProvider::GetInstance()->AreOverlaysSupported();
bool use_android_overlay =
base::FeatureList::IsEnabled(media::kUseAndroidOverlay);
if (force_to_support_secure_codecs_ ||
(are_overlay_supported && use_android_overlay)) {
DVLOG(1) << "Rendering the output of secure codecs is supported!";
response->secure_codecs = GetSupportedCodecs(request, true);
}
response->is_persistent_license_supported =
MediaDrmBridge::IsPersistentLicenseTypeSupported(request.key_system);
}
void CdmMessageFilterAndroid::OnGetPlatformKeySystemNames(
std::vector<std::string>* key_systems) {
*key_systems = MediaDrmBridge::GetPlatformKeySystemNames();
}
} // namespace cdm
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