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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.
#ifndef MEDIA_BASE_MAC_VIDEOTOOLBOX_GLUE_H_
#define MEDIA_BASE_MAC_VIDEOTOOLBOX_GLUE_H_
#include <stdint.h>
#include "base/macros.h"
#include "media/base/mac/coremedia_glue.h"
#include "media/base/media_export.h"
// VideoToolbox API is available in and after OS X 10.9 and iOS 8 (10.8 has
// support for software encoding, but this class exposes the 10.9 API level).
// Chromium requires OS X 10.9 or iOS 9. This class is defined to try and load
// the VideoToolbox library at runtime. If it succeeds, clients can use
// VideoToolbox via this class.
// Note that this file is necessary because Chromium still targets OS X 10.6 for
// deployment. It should be deprecated soon, see crbug.com/579648.
class MEDIA_EXPORT VideoToolboxGlue {
public:
class Loader;
// Returns a glue object if VideoToolbox is supported or null otherwise.
// Using a glue object allows to avoid expensive atomic operations on every
// function call. The object has process life duration and must not be
// deleted.
static const VideoToolboxGlue* Get();
// Originally from VTErrors.h
typedef UInt32 VTEncodeInfoFlags;
enum {
kVTEncodeInfo_Asynchronous = 1UL << 0,
kVTEncodeInfo_FrameDropped = 1UL << 1,
};
// Originally from VTCompressionSession.h
typedef struct OpaqueVTCompressionSession* VTCompressionSessionRef;
typedef void (*VTCompressionOutputCallback)(
void* outputCallbackRefCon,
void* sourceFrameRefCon,
OSStatus status,
VTEncodeInfoFlags infoFlags,
CoreMediaGlue::CMSampleBufferRef sampleBuffer);
// Originally from VTSession.h
typedef CFTypeRef VTSessionRef;
// Originally from VTCompressionProperties.h
CFStringRef kVTCompressionPropertyKey_AllowFrameReordering() const;
CFStringRef kVTCompressionPropertyKey_AverageBitRate() const;
CFStringRef kVTCompressionPropertyKey_ColorPrimaries() const;
CFStringRef kVTCompressionPropertyKey_DataRateLimits() const;
CFStringRef kVTCompressionPropertyKey_ExpectedFrameRate() const;
CFStringRef kVTCompressionPropertyKey_MaxFrameDelayCount() const;
CFStringRef kVTCompressionPropertyKey_MaxKeyFrameInterval() const;
CFStringRef kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration() const;
CFStringRef kVTCompressionPropertyKey_ProfileLevel() const;
CFStringRef kVTCompressionPropertyKey_RealTime() const;
CFStringRef kVTCompressionPropertyKey_TransferFunction() const;
CFStringRef kVTCompressionPropertyKey_YCbCrMatrix() const;
CFStringRef kVTEncodeFrameOptionKey_ForceKeyFrame() const;
CFStringRef kVTProfileLevel_H264_Baseline_AutoLevel() const;
CFStringRef kVTProfileLevel_H264_Main_AutoLevel() const;
CFStringRef kVTProfileLevel_H264_Extended_AutoLevel() const;
CFStringRef kVTProfileLevel_H264_High_AutoLevel() const;
CFStringRef
kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder()
const;
CFStringRef
kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder() const;
// Originally from VTCompressionSession.h
OSStatus VTCompressionSessionCreate(
CFAllocatorRef allocator,
int32_t width,
int32_t height,
CoreMediaGlue::CMVideoCodecType codecType,
CFDictionaryRef encoderSpecification,
CFDictionaryRef sourceImageBufferAttributes,
CFAllocatorRef compressedDataAllocator,
VTCompressionOutputCallback outputCallback,
void* outputCallbackRefCon,
VTCompressionSessionRef* compressionSessionOut) const;
OSStatus VTCompressionSessionEncodeFrame(
VTCompressionSessionRef session,
CVImageBufferRef imageBuffer,
CoreMediaGlue::CMTime presentationTimeStamp,
CoreMediaGlue::CMTime duration,
CFDictionaryRef frameProperties,
void* sourceFrameRefCon,
VTEncodeInfoFlags* infoFlagsOut) const;
CVPixelBufferPoolRef VTCompressionSessionGetPixelBufferPool(
VTCompressionSessionRef session) const;
void VTCompressionSessionInvalidate(VTCompressionSessionRef session) const;
OSStatus VTCompressionSessionCompleteFrames(
VTCompressionSessionRef session,
CoreMediaGlue::CMTime completeUntilPresentationTimeStamp) const;
// Originally from VTSession.h
OSStatus VTSessionSetProperty(VTSessionRef session,
CFStringRef propertyKey,
CFTypeRef propertyValue) const;
private:
struct Library;
VideoToolboxGlue();
Library* library_;
DISALLOW_COPY_AND_ASSIGN(VideoToolboxGlue);
};
#endif // MEDIA_BASE_MAC_VIDEOTOOLBOX_GLUE_H_
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