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screencast: use the pipewire callback process to start screencast

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We can trigger that with pw_stream_trigger_process when we are the
driver of the stream. Additionally this let's us run passivly with the
consumer driving the stream.
This commit is contained in:
columbarius 2021-09-09 17:20:12 +02:00
parent 7b3a17bae0
commit b2f1a10023
3 changed files with 23 additions and 4 deletions
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2
include/pipewire_screencast.h
View file

@ -6,6 +6,8 @@
#define XDPW_PWR_BUFFERS 1
#define XDPW_PWR_ALIGN 16
void xdpw_pwr_trigger_process(struct xdpw_screencast_instance *cast);
bool xdpw_pwr_is_driving(struct xdpw_screencast_instance *cast);
void xdpw_pwr_dequeue_buffer(struct xdpw_screencast_instance *cast);
void xdpw_pwr_enqueue_buffer(struct xdpw_screencast_instance *cast);
void pwr_update_stream_param(struct xdpw_screencast_instance *cast);

17
src/screencast/pipewire_screencast.c
View file

@ -44,6 +44,14 @@ static struct spa_pod *build_format(struct spa_pod_builder *b, enum spa_video_fo
return spa_pod_builder_pop(b, &f[0]);
}
static void pwr_handle_stream_process(void *data) {
struct xdpw_screencast_instance *cast = data;
logprint(TRACE, "pipewire: stream process");
xdpw_wlr_frame_start(cast);
}
static void pwr_handle_stream_state_changed(void *data,
enum pw_stream_state old, enum pw_stream_state state, const char *error) {
struct xdpw_screencast_instance *cast = data;
@ -176,8 +184,17 @@ static const struct pw_stream_events pwr_stream_events = {
.param_changed = pwr_handle_stream_param_changed,
.add_buffer = pwr_handle_stream_add_buffer,
.remove_buffer = pwr_handle_stream_remove_buffer,
.process = pwr_handle_stream_process,
};
void xdpw_pwr_trigger_process(struct xdpw_screencast_instance *cast) {
pw_stream_trigger_process(cast->stream);
}
bool xdpw_pwr_is_driving(struct xdpw_screencast_instance *cast) {
return pw_stream_is_driving(cast->stream);
}
void xdpw_pwr_dequeue_buffer(struct xdpw_screencast_instance *cast) {
logprint(TRACE, "pipewire: dequeueing buffer");

8
src/screencast/wlr_screencast.c
View file

@ -53,17 +53,17 @@ void xdpw_wlr_frame_finish(struct xdpw_screencast_instance *cast) {
return ;
}
if (cast->pwr_stream_state) {
if (cast->pwr_stream_state && xdpw_pwr_is_driving(cast)) {
if (cast->frame_state == XDPW_FRAME_STATE_SUCCESS) {
uint64_t delay_ns = fps_limit_measure_end(&cast->fps_limit, cast->framerate);
if (delay_ns > 0) {
xdpw_add_timer(cast->ctx->state, delay_ns,
(xdpw_event_loop_timer_func_t) xdpw_wlr_frame_start, cast);
(xdpw_event_loop_timer_func_t) xdpw_pwr_trigger_process, cast);
} else {
xdpw_wlr_frame_start(cast);
xdpw_pwr_trigger_process(cast);
}
} else {
xdpw_wlr_frame_start(cast);
xdpw_pwr_trigger_process(cast);
}
}
}