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Expose screen as frame sink

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Make screen implement the frame sink trait.

This will allow the decoder to push frames without depending on the
concrete sink type.
This commit is contained in:
Romain Vimont 2021-04-11 15:01:05 +02:00
parent bb6ac2b084
commit 6d8f0a247f
2 changed files with 36 additions and 0 deletions
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33
app/src/screen.c
View file

@ -13,6 +13,8 @@
#define DISPLAY_MARGINS 96
#define DOWNCAST(SINK) container_of(SINK, struct screen, frame_sink)
static inline struct size
get_rotated_size(struct size size, int rotation) {
struct size rotated_size;
@ -262,6 +264,29 @@ event_watcher(void *data, SDL_Event *event) {
}
#endif
static bool
screen_frame_sink_open(struct sc_frame_sink *sink) {
struct screen *screen = DOWNCAST(sink);
(void) screen;
// nothing to do, the screen is already open on the main thread
return true;
}
static void
screen_frame_sink_close(struct sc_frame_sink *sink) {
struct screen *screen = DOWNCAST(sink);
(void) screen;
// nothing to do, the screen lifecycle is not managed by the frame producer
}
static bool
screen_frame_sink_push(struct sc_frame_sink *sink, const AVFrame *frame) {
struct screen *screen = DOWNCAST(sink);
return video_buffer_push(screen->vb, frame);
}
bool
screen_init(struct screen *screen, struct video_buffer *vb,
struct fps_counter *fps_counter,
@ -402,6 +427,14 @@ screen_init(struct screen *screen, struct video_buffer *vb,
SDL_AddEventWatch(event_watcher, screen);
#endif
static const struct sc_frame_sink_ops ops = {
.open = screen_frame_sink_open,
.close = screen_frame_sink_close,
.push = screen_frame_sink_push,
};
screen->frame_sink.ops = &ops;
return true;
}

3
app/src/screen.h
View file

@ -9,10 +9,13 @@
#include "coords.h"
#include "opengl.h"
#include "trait/frame_sink.h"
struct video_buffer;
struct screen {
struct sc_frame_sink frame_sink; // frame sink trait
struct video_buffer *vb;
struct fps_counter *fps_counter;