media/base/mac/coremedia_glue.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_BASE_MAC_COREMEDIA_GLUE_H_
   6 #define MEDIA_BASE_MAC_COREMEDIA_GLUE_H_
   7
   8 #include <CoreVideo/CoreVideo.h>
   9
  10 #include "base/basictypes.h"
  11 #include "media/base/media_export.h"
  12
  13 // CoreMedia API is only introduced in Mac OS X > 10.6, the (potential) linking
  14 // with it has to happen in runtime. If it succeeds, subsequent clients can use
  15 // CoreMedia via the class declared in this file, where the original naming has
  16 // been kept as much as possible.
  17 class MEDIA_EXPORT CoreMediaGlue {
  18  public:
  19   // Originally from CMTime.h
  20   typedef int64_t CMTimeValue;
  21   typedef int32_t CMTimeScale;
  22   typedef int64_t CMTimeEpoch;
  23   typedef uint32_t CMTimeFlags;
  24   typedef struct {
  25     CMTimeValue value;
  26     CMTimeScale timescale;
  27     CMTimeFlags flags;
  28     CMTimeEpoch epoch;
  29   } CMTime;
  30
  31   // Originally from CMBlockBuffer.h
  32   typedef uint32_t CMBlockBufferFlags;
  33   typedef struct OpaqueCMBlockBuffer* CMBlockBufferRef;
  34   typedef struct {
  35     uint32_t version;
  36     void* (*AllocateBlock)(void*, size_t);
  37     void (*FreeBlock)(void*, void*, size_t);
  38     void* refCon;
  39   } CMBlockBufferCustomBlockSource;
  40
  41   // Originally from CMFormatDescription.h.
  42   typedef const struct opaqueCMFormatDescription* CMFormatDescriptionRef;
  43   typedef CMFormatDescriptionRef CMVideoFormatDescriptionRef;
  44   typedef FourCharCode CMVideoCodecType;
  45   typedef struct {
  46     int32_t width;
  47     int32_t height;
  48   } CMVideoDimensions;
  49   enum {
  50     kCMPixelFormat_422YpCbCr8_yuvs = 'yuvs',
  51   };
  52   enum {
  53     kCMVideoCodecType_JPEG_OpenDML = 'dmb1',
  54     kCMVideoCodecType_H264 = 'avc1',
  55   };
  56
  57   // Originally from CMFormatDescriptionBridge.h
  58   enum {
  59     kCMFormatDescriptionBridgeError_InvalidParameter = -12712,
  60   };
  61
  62   // Originally from CMSampleBuffer.h.
  63   typedef struct OpaqueCMSampleBuffer* CMSampleBufferRef;
  64
  65   // Originally from CMTime.h.
  66   static CMTime CMTimeMake(int64_t value, int32_t timescale);
  67
  68   // Originally from CMBlockBuffer.h
  69   static OSStatus CMBlockBufferCreateContiguous(
  70       CFAllocatorRef structureAllocator,
  71       CMBlockBufferRef sourceBuffer,
  72       CFAllocatorRef blockAllocator,
  73       const CMBlockBufferCustomBlockSource* customBlockSource,
  74       size_t offsetToData,
  75       size_t dataLength,
  76       CMBlockBufferFlags flags,
  77       CMBlockBufferRef* newBBufOut);
  78   static size_t CMBlockBufferGetDataLength(CMBlockBufferRef theBuffer);
  79   static OSStatus CMBlockBufferGetDataPointer(CMBlockBufferRef theBuffer,
  80                                               size_t offset,
  81                                               size_t* lengthAtOffset,
  82                                               size_t* totalLength,
  83                                               char** dataPointer);
  84   static Boolean CMBlockBufferIsRangeContiguous(CMBlockBufferRef theBuffer,
  85                                                 size_t offset,
  86                                                 size_t length);
  87
  88   // Originally from CMSampleBuffer.h.
  89   static CMBlockBufferRef CMSampleBufferGetDataBuffer(CMSampleBufferRef sbuf);
  90   static CMFormatDescriptionRef CMSampleBufferGetFormatDescription(
  91       CMSampleBufferRef sbuf);
  92   static CVImageBufferRef CMSampleBufferGetImageBuffer(
  93       CMSampleBufferRef buffer);
  94   static CFArrayRef CMSampleBufferGetSampleAttachmentsArray(
  95       CMSampleBufferRef sbuf,
  96       Boolean createIfNecessary);
  97   static CFStringRef kCMSampleAttachmentKey_NotSync();
  98
  99   // Originally from CMFormatDescription.h.
 100   static FourCharCode CMFormatDescriptionGetMediaSubType(
 101       CMFormatDescriptionRef desc);
 102   static CMVideoDimensions CMVideoFormatDescriptionGetDimensions(
 103       CMVideoFormatDescriptionRef videoDesc);
 104   static OSStatus CMVideoFormatDescriptionGetH264ParameterSetAtIndex(
 105       CMFormatDescriptionRef videoDesc,
 106       size_t parameterSetIndex,
 107       const uint8_t** parameterSetPointerOut,
 108       size_t* parameterSetSizeOut,
 109       size_t* parameterSetCountOut,
 110       int* NALUnitHeaderLengthOut)
 111       /*__OSX_AVAILABLE_STARTING(__MAC_10_9,__IPHONE_7_0)*/;
 112
 113  private:
 114   DISALLOW_IMPLICIT_CONSTRUCTORS(CoreMediaGlue);
 115 };
 116
 117 #endif  // MEDIA_BASE_MAC_COREMEDIA_GLUE_H_