path: root/audio_hwsync.h (plain)
blob: 9330c6b4e92c3e9eb447a289e830478318c9f066

1	#ifndef _AUDIO_HWSYNC_H_
2	#define _AUDIO_HWSYNC_H_
3
4	#include <stdbool.h>
5
6	#define TSYNC_FIRSTAPTS "/sys/class/tsync/firstapts"
7	#define TSYNC_PCRSCR "/sys/class/tsync/pts_pcrscr"
8	#define TSYNC_EVENT "/sys/class/tsync/event"
9	#define TSYNC_APTS "/sys/class/tsync/pts_audio"
10	#define SYSTIME_CORRECTION_THRESHOLD (90000*10/100)
11	#define NSEC_PER_SECOND 1000000000ULL
12	#define HW_SYNC_STATE_HEADER 0
13	#define HW_SYNC_STATE_BODY 1
14	#define HW_SYNC_STATE_RESYNC 2
15	#define APTS_DISCONTINUE_THRESHOLD (90000)
16	#define APTS_DISCONTINUE_THRESHOLD_MIN (90000/1000*100)
17	#define APTS_DISCONTINUE_THRESHOLD_MAX (5*90000)
18
19	typedef struct audio_hwsync {
20	uint8_t hw_sync_header[16];
21	size_t hw_sync_header_cnt;
22	int hw_sync_state;
23	size_t hw_sync_body_cnt;
24	int hw_sync_frame_size;
25	uint8_t hw_sync_body_buf[4096];
26	uint8_t body_align[64];
27	uint8_t body_align_cnt;
28	bool first_apts_flag;//flag to indicate set first apts
29	uint64_t first_apts;
30	uint64_t last_apts_from_header;
31	} audio_hwsync_t;
32	static inline bool hwsync_header_valid(uint8_t *header)
33	{
34	return (header[0] == 0x55) &&
35	(header[1] == 0x55) &&
36	(header[2] == 0x00) &&
37	(header[3] == 0x01);
38	}
39
40	static inline uint64_t hwsync_header_get_pts(uint8_t *header)
41	{
42	return (((uint64_t)header[8]) << 56) |
43	(((uint64_t)header[9]) << 48) |
44	(((uint64_t)header[10]) << 40) |
45	(((uint64_t)header[11]) << 32) |
46	(((uint64_t)header[12]) << 24) |
47	(((uint64_t)header[13]) << 16) |
48	(((uint64_t)header[14]) << 8) |
49	((uint64_t)header[15]);
50	}
51
52	static inline uint32_t hwsync_header_get_size(uint8_t *header)
53	{
54	return (((uint32_t)header[4]) << 24) |
55	(((uint32_t)header[5]) << 16) |
56	(((uint32_t)header[6]) << 8) |
57	((uint32_t)header[7]);
58	}
59
60	static inline uint64_t get_pts_gap(uint64_t a, uint64_t b)
61	{
62	if (a >= b)
63	return (a - b);
64	else
65	return (b - a);
66	}
67
68	void aml_audio_hwsync_init(audio_hwsync_t *p_hwsync);
69	int aml_audio_hwsync_find_frame(audio_hwsync_t *p_hwsync,
70	const void *in_buffer, size_t in_bytes, uint64_t *cur_pts, int *outsize);
71	int aml_audio_hwsync_set_first_pts(audio_hwsync_t *p_hwsync, uint64_t pts);
72	#endif
73