av_state.h

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#pragma once
 
#include <libplatform/atomic.h>
 
typedef enum {
  SESSION_AV_STATE_IDLE,
  SESSION_AV_STATE_STARTING,
  SESSION_AV_STATE_ACTIVE,
  SESSION_AV_STATE_STOPPING,
} session_av_state_phase_t;

typedef struct {
  atomic_t phase;      
  uint32_t generation; 
} session_av_state_t;

session_av_state_t *session_av_state_create(void);
void session_av_state_destroy(session_av_state_t *state);
uint32_t session_av_state_generation(const session_av_state_t *state);

uint32_t session_av_state_begin(session_av_state_t *state);
bool session_av_state_complete(session_av_state_t *state, uint32_t generation);
bool session_av_state_is_current(session_av_state_t *state, uint32_t generation);
bool session_av_state_is_active(session_av_state_t *state);
bool session_av_state_should_run(session_av_state_t *state);
void session_av_state_begin_stop(session_av_state_t *state);
void session_av_state_finish_stop(session_av_state_t *state);