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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.
#ifndef MEDIA_BASE_MAC_COREMEDIA_GLUE_H_
#define MEDIA_BASE_MAC_COREMEDIA_GLUE_H_
#include <CoreVideo/CoreVideo.h>
#include <stddef.h>
#include <stdint.h>
#include "base/macros.h"
#include "media/base/media_export.h"
// CoreMedia API is only introduced in Mac OS X > 10.6, the (potential) linking
// with it has to happen in runtime. If it succeeds, subsequent clients can use
// CoreMedia via the class declared in this file, where the original naming has
// been kept as much as possible.
class MEDIA_EXPORT CoreMediaGlue {
public:
// Originally from CMTime.h
typedef int64_t CMTimeValue;
typedef int32_t CMTimeScale;
typedef int64_t CMTimeEpoch;
typedef uint32_t CMTimeFlags;
typedef struct {
CMTimeValue value;
CMTimeScale timescale;
CMTimeFlags flags;
CMTimeEpoch epoch;
} CMTime;
// Originally from CMBlockBuffer.h
typedef uint32_t CMBlockBufferFlags;
typedef struct OpaqueCMBlockBuffer* CMBlockBufferRef;
typedef struct {
uint32_t version;
void* (*AllocateBlock)(void*, size_t);
void (*FreeBlock)(void*, void*, size_t);
void* refCon;
} CMBlockBufferCustomBlockSource;
// Originally from CMFormatDescription.h.
typedef const struct opaqueCMFormatDescription* CMFormatDescriptionRef;
typedef CMFormatDescriptionRef CMVideoFormatDescriptionRef;
typedef FourCharCode CMVideoCodecType;
typedef struct {
int32_t width;
int32_t height;
} CMVideoDimensions;
enum {
kCMPixelFormat_422YpCbCr8_yuvs = 'yuvs',
};
enum {
kCMVideoCodecType_JPEG_OpenDML = 'dmb1',
kCMVideoCodecType_H264 = 'avc1',
};
// Originally from CMFormatDescriptionBridge.h
enum {
kCMFormatDescriptionBridgeError_InvalidParameter = -12712,
};
// Originally from CMSampleBuffer.h.
typedef struct OpaqueCMSampleBuffer* CMSampleBufferRef;
// Originally from CMTime.h.
static CMTime CMTimeMake(int64_t value, int32_t timescale);
// Originally from CMBlockBuffer.h
static OSStatus CMBlockBufferCreateContiguous(
CFAllocatorRef structureAllocator,
CMBlockBufferRef sourceBuffer,
CFAllocatorRef blockAllocator,
const CMBlockBufferCustomBlockSource* customBlockSource,
size_t offsetToData,
size_t dataLength,
CMBlockBufferFlags flags,
CMBlockBufferRef* newBBufOut);
static size_t CMBlockBufferGetDataLength(CMBlockBufferRef theBuffer);
static OSStatus CMBlockBufferGetDataPointer(CMBlockBufferRef theBuffer,
size_t offset,
size_t* lengthAtOffset,
size_t* totalLength,
char** dataPointer);
static Boolean CMBlockBufferIsRangeContiguous(CMBlockBufferRef theBuffer,
size_t offset,
size_t length);
// Originally from CMSampleBuffer.h.
static CMBlockBufferRef CMSampleBufferGetDataBuffer(CMSampleBufferRef sbuf);
static CMFormatDescriptionRef CMSampleBufferGetFormatDescription(
CMSampleBufferRef sbuf);
static CVImageBufferRef CMSampleBufferGetImageBuffer(
CMSampleBufferRef buffer);
static CFArrayRef CMSampleBufferGetSampleAttachmentsArray(
CMSampleBufferRef sbuf,
Boolean createIfNecessary);
static CFStringRef kCMSampleAttachmentKey_NotSync();
static CMTime CMSampleBufferGetPresentationTimeStamp(CMSampleBufferRef sbuf);
// Originally from CMFormatDescription.h.
static FourCharCode CMFormatDescriptionGetMediaSubType(
CMFormatDescriptionRef desc);
static CMVideoDimensions CMVideoFormatDescriptionGetDimensions(
CMVideoFormatDescriptionRef videoDesc);
static OSStatus CMVideoFormatDescriptionGetH264ParameterSetAtIndex(
CMFormatDescriptionRef videoDesc,
size_t parameterSetIndex,
const uint8_t** parameterSetPointerOut,
size_t* parameterSetSizeOut,
size_t* parameterSetCountOut,
int* NALUnitHeaderLengthOut)
/*__OSX_AVAILABLE_STARTING(__MAC_10_9,__IPHONE_7_0)*/;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(CoreMediaGlue);
};
#endif // MEDIA_BASE_MAC_COREMEDIA_GLUE_H_
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