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media / base / mac / videotoolbox_helpers.h [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_
#define MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_
#include <CoreMedia/CoreMedia.h>
#include <VideoToolbox/VideoToolbox.h>
#include "base/apple/scoped_cftyperef.h"
#include "base/notreached.h"
#include "media/base/media_export.h"
#include "media/base/video_codecs.h"
namespace media::video_toolbox {
// Copy a H.264/HEVC frame stored in a CM sample buffer to an Annex B buffer.
// Copies parameter sets for keyframes before the frame data as well.
MEDIA_EXPORT bool CopySampleBufferToAnnexBBuffer(VideoCodec codec,
CMSampleBufferRef sbuf,
bool keyframe,
std::string* annexb_buffer);
MEDIA_EXPORT bool CopySampleBufferToAnnexBBuffer(VideoCodec codec,
CMSampleBufferRef sbuf,
bool keyframe,
size_t annexb_buffer_size,
char* annexb_buffer,
size_t* used_buffer_size);
struct ScopedVTCompressionSessionRefTraits {
static VTCompressionSessionRef InvalidValue() { return nullptr; }
static VTCompressionSessionRef Retain(VTCompressionSessionRef session) {
NOTREACHED() << "Only compatible with ASSUME policy";
}
static void Release(VTCompressionSessionRef session) {
// Blocks until all pending frames have been flushed out.
VTCompressionSessionInvalidate(session);
CFRelease(session);
}
};
// A scoper for VTCompressionSessionRef that makes sure
// VTCompressionSessionInvalidate() is called before releasing.
using ScopedVTCompressionSessionRef =
base::apple::ScopedTypeRef<VTCompressionSessionRef,
ScopedVTCompressionSessionRefTraits>;
// Helper class to add session properties to a VTCompressionSessionRef.
class MEDIA_EXPORT SessionPropertySetter {
public:
SessionPropertySetter(
base::apple::ScopedCFTypeRef<VTCompressionSessionRef> session);
~SessionPropertySetter();
bool IsSupported(CFStringRef key);
bool Set(CFStringRef key, int32_t value);
bool Set(CFStringRef key, bool value);
bool Set(CFStringRef key, double value);
bool Set(CFStringRef key, CFStringRef value);
bool Set(CFStringRef key, CFArrayRef value);
private:
base::apple::ScopedCFTypeRef<VTCompressionSessionRef> session_;
base::apple::ScopedCFTypeRef<CFDictionaryRef> supported_keys_;
};
} // namespace media::video_toolbox
#endif // MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_