GPMF_utils.h

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// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: Copyright 2017 GoPro Inc (http://gopro.com/).
 
#ifndef _GPMF_UTILS_H
#define _GPMF_UTILS_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define GPMF_SAMPLE_RATE_FAST           0
#define GPMF_SAMPLE_RATE_PRECISE        1
 
typedef struct mp4callbacks
{
        size_t mp4handle;
        uint32_t (*cbGetNumberPayloads)(size_t mp4handle);                                                                      // number of indexed GPMF payloads
        uint32_t (*cbGetPayloadSize)(size_t mp4handle, uint32_t index);                                 // get payload size for a particular index
        uint32_t *(*cbGetPayload)(size_t mp4handle, size_t res, uint32_t index);                        // get payload data for a particular index
        size_t   (*cbGetPayloadResource)(size_t mp4handle, size_t reshandle, uint32_t initialMemorySize);       // get payload memory handler
        void     (*cbFreePayloadResource)(size_t mp4handle, size_t reshandle);                                                  // free payload memory handler
        uint32_t (*cbGetPayloadTime)(size_t mp4handle, uint32_t index, double* in, double* out); //MP4 timestamps for the payload
        uint32_t (*cbGetEditListOffsetRationalTime)(size_t mp4handle,                                           // get any time offset for GPMF track
                int32_t  *offset_numerator, uint32_t* denominator);
} mp4callbacks;
 
double GetGPMFSampleRate(mp4callbacks cbobject, uint32_t fourcc, uint32_t timeBaseFourCC, uint32_t flags, double* in, double* out);
 
#ifdef __cplusplus
}
#endif
 
#endif