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56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/**
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* @file Timebase.h
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* @author Devon Crawford
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* @date February 21, 2019
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* @brief File containing the definition and usage for Timebase API:
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* Useful timebase conversions and seek functionality for VideoContext
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*/
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#ifndef _TIMEBASE_API_
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#define _TIMEBASE_API_
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/* Set our seek function to only seek to I-frames before our desired frame */
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#define FFMPEG_SEEK_FLAG AVSEEK_FLAG_BACKWARD
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#include "VideoContext.h"
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#include <string.h>
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/**
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* Check if AVRational is valid
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* @param r AVRational to check
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* @return true if invalid
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*/
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bool valid_rational(AVRational r);
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/**
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* Convert video pts into frame index
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* @param vid_ctx VideoContext
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* @param pts presentation timestamp of video frames
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* @return >= 0 on success: frame index representation of pts param
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*/
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int64_t cov_video_pts(VideoContext *vid_ctx, int64_t pts);
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/**
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Return >= 0 on success
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*/
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int64_t get_video_frame_pts(VideoContext *vid_ctx, int frameIndex);
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int seek_video(VideoContext *vid_ctx, int frameIndex);
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/**
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Return >= 0 on success
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*/
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int seek_video_pts(VideoContext *vid_ctx, int pts);
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int64_t get_audio_frame_pts(VideoContext *vid_ctx, int frameIndex);
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int64_t cov_video_to_audio_pts(VideoContext *vid_ctx, int videoFramePts);
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/**
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* Print an AVRational struct
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* @param tb timebase to print
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* @return string allocated on heap. to be freed by caller
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*/
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char *print_time_base(AVRational *tb);
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#endif |