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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 <stdint.h>
#include <limits>
#include "base/allocator/buildflags.h"
#include "base/command_line.h"
#include "base/metrics/field_trial.h"
#include "base/no_destructor.h"
#include "base/trace_event/trace_event.h"
#include "media/base/media_switches.h"
#include "media/media_buildflags.h"
#include "third_party/libyuv/include/libyuv.h"
#if BUILDFLAG(ENABLE_FFMPEG)
#include "third_party/ffmpeg/ffmpeg_features.h" // nogncheck
extern "C" {
#include <libavutil/cpu.h>
#include <libavutil/log.h>
#include <libavutil/mem.h>
}
#endif
namespace media {
// Media must only be initialized once; use a thread-safe static to do this.
class MediaInitializer {
public:
MediaInitializer() {
// Initializing the CPU flags may query /proc for details on the current CPU
// for NEON, VFP, etc optimizations. If in a sandboxed process, they should
// have been forced (see InitializeMediaLibraryInSandbox).
libyuv::InitCpuFlags();
#if BUILDFLAG(ENABLE_FFMPEG)
av_get_cpu_flags();
// Disable logging as it interferes with layout tests.
av_log_set_level(AV_LOG_QUIET);
#if BUILDFLAG(USE_ALLOCATOR_SHIM)
// Remove allocation limit from ffmpeg, so calls go down to shim layer.
av_max_alloc(std::numeric_limits<size_t>::max());
#endif // BUILDFLAG(USE_ALLOCATOR_SHIM)
#endif // BUILDFLAG(ENABLE_FFMPEG)
}
MediaInitializer(const MediaInitializer&) = delete;
MediaInitializer& operator=(const MediaInitializer&) = delete;
private:
~MediaInitializer() = delete;
};
static const MediaInitializer& GetMediaInstance() {
static const base::NoDestructor<MediaInitializer> instance;
return *instance;
}
void InitializeMediaLibrary() {
GetMediaInstance();
}
void InitializeMediaLibraryInSandbox(int64_t libyuv_cpu_flags,
int64_t libavutil_cpu_flags) {
// Force the CPU flags so when they don't require disk access when queried
// from MediaInitializer().
libyuv::SetCpuFlags(libyuv_cpu_flags);
#if BUILDFLAG(ENABLE_FFMPEG)
av_force_cpu_flags(libavutil_cpu_flags);
#endif
GetMediaInstance();
}
} // namespace media
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