58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#include <pthread.h>
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typedef struct buffer_s buffer_t;
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typedef struct buffer_list_s buffer_list_t;
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typedef struct buffer_lock_s buffer_lock_t;
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typedef bool (*buffer_lock_check_streaming)(buffer_lock_t *buf_lock);
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typedef void (*buffer_lock_notify_buffer)(buffer_lock_t *buf_lock, buffer_t *buf);
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#define BUFFER_LOCK_MAX_CALLBACKS 10
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typedef struct buffer_lock_s {
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const char *name;
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buffer_list_t *buf_list;
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buffer_lock_check_streaming check_streaming[BUFFER_LOCK_MAX_CALLBACKS];
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buffer_lock_notify_buffer notify_buffer[BUFFER_LOCK_MAX_CALLBACKS];
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// private
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pthread_mutex_t lock;
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pthread_cond_t cond_wait;
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buffer_t *buf;
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uint64_t buf_time_us;
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int counter;
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int refs;
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int dropped;
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uint64_t timeout_us;
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int frame_interval_ms;
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} buffer_lock_t;
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#define DEFAULT_BUFFER_LOCK_TIMEOUT 16 // ~60fps
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#define DEFAULT_BUFFER_LOCK_GET_TIMEOUT 2000 // 2s
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#define DEFINE_BUFFER_LOCK(_name, _timeout_ms) buffer_lock_t _name = { \
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.name = #_name, \
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.lock = PTHREAD_MUTEX_INITIALIZER, \
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.cond_wait = PTHREAD_COND_INITIALIZER, \
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.timeout_us = (_timeout_ms > DEFAULT_BUFFER_LOCK_TIMEOUT ? _timeout_ms : DEFAULT_BUFFER_LOCK_TIMEOUT) * 1000LL, \
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};
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#define DECLARE_BUFFER_LOCK(_name) extern buffer_lock_t _name;
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typedef int (*buffer_write_fn)(buffer_lock_t *buf_lock, buffer_t *buf, int frame, void *data);
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void buffer_lock_capture(buffer_lock_t *buf_lock, buffer_t *buf);
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buffer_t *buffer_lock_get(buffer_lock_t *buf_lock, int timeout_ms, int *counter);
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bool buffer_lock_needs_buffer(buffer_lock_t *buf_lock);
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void buffer_lock_use(buffer_lock_t *buf_lock, int ref);
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bool buffer_lock_is_used(buffer_lock_t *buf_lock);
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int buffer_lock_write_loop(buffer_lock_t *buf_lock, int nframes, unsigned timeout_ms, buffer_write_fn fn, void *data);
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bool buffer_lock_register_check_streaming(buffer_lock_t *buf_lock, buffer_lock_check_streaming check_streaming);
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bool buffer_lock_register_notify_buffer(buffer_lock_t *buf_lock, buffer_lock_notify_buffer notify_buffer);
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