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// 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/base/media.h"
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/metrics/field_trial.h"
#include "base/trace_event/trace_event.h"
#include "media/base/media_switches.h"
#include "media/base/yuv_convert.h"
#if defined(OS_ANDROID)
#include "base/android/build_info.h"
#include "media/base/android/media_codec_util.h"
#endif
#if !defined(MEDIA_DISABLE_FFMPEG)
#include "media/ffmpeg/ffmpeg_common.h"
#endif
namespace media {
// Media must only be initialized once, so use a LazyInstance to ensure this.
class MediaInitializer {
public:
void enable_platform_decoder_support() {
has_platform_decoder_support_ = true;
}
bool has_platform_decoder_support() { return has_platform_decoder_support_; }
private:
friend struct base::DefaultLazyInstanceTraits<MediaInitializer>;
MediaInitializer() {
TRACE_EVENT_WARMUP_CATEGORY("audio");
TRACE_EVENT_WARMUP_CATEGORY("media");
// Perform initialization of libraries which require runtime CPU detection.
InitializeCPUSpecificYUVConversions();
#if !defined(MEDIA_DISABLE_FFMPEG)
// Initialize CPU flags outside of the sandbox as this may query /proc for
// details on the current CPU for NEON, VFP, etc optimizations.
av_get_cpu_flags();
// Disable logging as it interferes with layout tests.
av_log_set_level(AV_LOG_QUIET);
#if defined(ALLOCATOR_SHIM)
// Remove allocation limit from ffmpeg, so calls go down to shim layer.
av_max_alloc(0);
#endif // defined(ALLOCATOR_SHIM)
#endif // !defined(MEDIA_DISABLE_FFMPEG)
}
~MediaInitializer() {
NOTREACHED() << "MediaInitializer should be leaky!";
}
bool has_platform_decoder_support_ = false;
DISALLOW_COPY_AND_ASSIGN(MediaInitializer);
};
static base::LazyInstance<MediaInitializer>::Leaky g_media_library =
LAZY_INSTANCE_INITIALIZER;
void InitializeMediaLibrary() {
g_media_library.Get();
}
#if defined(OS_ANDROID)
void EnablePlatformDecoderSupport() {
g_media_library.Pointer()->enable_platform_decoder_support();
}
bool HasPlatformDecoderSupport() {
return g_media_library.Pointer()->has_platform_decoder_support();
}
bool PlatformHasOpusSupport() {
return base::android::BuildInfo::GetInstance()->sdk_int() >= 21;
}
bool PlatformHasVp9Support() {
return base::android::BuildInfo::GetInstance()->sdk_int() >= 19;
}
bool IsUnifiedMediaPipelineEnabled() {
// TODO(dalecurtis): This experiment is temporary and should be removed once
// we have enough data to support the primacy of the unified media pipeline;
// see http://crbug.com/533190 for details.
//
// Note: It's important to query the field trial state first, to ensure that
// UMA reports the correct group.
const std::string group_name =
base::FieldTrialList::FindFullName("UnifiedMediaPipelineTrial");
const bool enabled_via_cli =
base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableUnifiedMediaPipeline);
return enabled_via_cli ||
base::StartsWith(group_name, "Enabled", base::CompareCase::SENSITIVE);
}
bool IsUnifiedMediaPipelineEnabledForMse() {
// Don't check IsUnifiedMediaPipelineEnabled() here since we don't want MSE to
// be enabled via experiment yet; only when the existing implementation can't
// be used (i.e. MediaCodec unavailable).
return base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableUnifiedMediaPipeline) ||
!MediaCodecUtil::IsMediaCodecAvailable();
}
bool ArePlatformDecodersAvailable() {
return IsUnifiedMediaPipelineEnabled()
? HasPlatformDecoderSupport()
: MediaCodecUtil::IsMediaCodecAvailable();
}
#endif
} // namespace media
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