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camera: Added more accurate timestamps.

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This commit is contained in:
Ryan C. Gordon
2023-12-16 16:00:15 -05:00
parent d3e6ef3cc6
commit f87d536229
3 changed files with 32 additions and 4 deletions
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11
src/camera/SDL_syscamera.h
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@@ -25,7 +25,7 @@
#include "../SDL_hashtable.h"
#define DEBUG_CAMERA 1
#define DEBUG_CAMERA 0
// !!! FIXME: update these drivers!
@@ -92,6 +92,15 @@ struct SDL_CameraDevice
// Driver-specific hardware data on how to open device (`hidden` is driver-specific data _when opened_).
void *handle;
// Dropping the first frame(s) after open seems to help timing on some platforms.
int drop_frames;
// Backend timestamp of first acquired frame, so we can keep these meaningful regardless of epoch.
Uint64 base_timestamp;
// SDL timestamp of first acquired frame, so we can roughly convert to SDL ticks.
Uint64 adjust_timestamp;
// Pixel data flows from the driver into these, then gets converted for the app if necessary.
SDL_Surface *acquire_surface;