Sample Reference
The SampleReferenceRecord structure is used to describe information about a sample or group of similar samples. This data structure is used by the
GetMediaSampleReferences
and
AddMediaSampleReferences
functions.
struct SampleReferenceRecord {
long dataOffset;
long dataSize;
TimeValue durationPerSample;
long numberOfSamples;
short sampleFlags;
};
typedef struct SampleReferenceRecord SampleReferenceRecord;
typedef SampleReferenceRecord *SampleReferencePtr;
Field descriptions
-
dataOffset
-
Specifies the offset into the movie data file. This field specifies the offset into the file of the sample data.
-
dataSize
-
Specifies the total number of bytes of sample data identified by the reference. All samples referenced by a single
SampleReferenceRecord
must be the same size.
-
durationPerSample
-
Specifies the duration of each sample in the reference. You must specify this parameter in the media's time scale. All samples referenced by a single
SampleReferenceRecord
must be the same duration.
-
numberOfSamples
-
Specifies the number of samples contained in the reference.
-
sampleFlag
-
Contains flags that control the operation. The following flag is available (set unused flags to 0):
-
mediaSampleNotSync
-
Indicates whether the sample to be added is not a synchronous sample. Set this flag to 1 if the sample is not a synchronous sample. Set this flag to 0 if the sample is a synchronous sample.
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