path: root/audio_hwsync.h (plain)
blob: c78cab026603fe46d9c2b656924133114dc68c58

1	/*
2	* Copyright (C) 2010 Amlogic Corporation.
3	*
4	* Licensed under the Apache License, Version 2.0 (the "License");
5	* you may not use this file except in compliance with the License.
6	* You may obtain a copy of the License at
7	*
8	* http://www.apache.org/licenses/LICENSE-2.0
9	*
10	* Unless required by applicable law or agreed to in writing, software
11	* distributed under the License is distributed on an "AS IS" BASIS,
12	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13	* See the License for the specific language governing permissions and
14	* limitations under the License.
15	*/
16
17
18
19	#ifndef _AUDIO_HWSYNC_H_
20	#define _AUDIO_HWSYNC_H_
21
22	#include <stdbool.h>
23
24	#define TSYNC_FIRSTAPTS "/sys/class/tsync/firstapts"
25	#define TSYNC_PCRSCR "/sys/class/tsync/pts_pcrscr"
26	#define TSYNC_EVENT "/sys/class/tsync/event"
27	#define TSYNC_APTS "/sys/class/tsync/pts_audio"
28	#define SYSTIME_CORRECTION_THRESHOLD (90000*10/100)
29	#define NSEC_PER_SECOND 1000000000ULL
30	#define HW_SYNC_STATE_HEADER 0
31	#define HW_SYNC_STATE_BODY 1
32	#define HW_SYNC_STATE_RESYNC 2
33	#define APTS_DISCONTINUE_THRESHOLD (90000)
34	#define APTS_DISCONTINUE_THRESHOLD_MIN (90000/1000*100)
35	#define APTS_DISCONTINUE_THRESHOLD_MAX (5*90000)
36
37	typedef struct audio_hwsync {
38	uint8_t hw_sync_header[16];
39	size_t hw_sync_header_cnt;
40	int hw_sync_state;
41	size_t hw_sync_body_cnt;
42	int hw_sync_frame_size;
43	uint8_t hw_sync_body_buf[4096];
44	uint8_t body_align[64];
45	uint8_t body_align_cnt;
46	bool first_apts_flag;//flag to indicate set first apts
47	uint64_t first_apts;
48	uint64_t last_apts_from_header;
49	} audio_hwsync_t;
50	static inline bool hwsync_header_valid(uint8_t *header)
51	{
52	return (header[0] == 0x55) &&
53	(header[1] == 0x55) &&
54	(header[2] == 0x00) &&
55	(header[3] == 0x01);
56	}
57
58	static inline uint64_t hwsync_header_get_pts(uint8_t *header)
59	{
60	return (((uint64_t)header[8]) << 56) |
61	(((uint64_t)header[9]) << 48) |
62	(((uint64_t)header[10]) << 40) |
63	(((uint64_t)header[11]) << 32) |
64	(((uint64_t)header[12]) << 24) |
65	(((uint64_t)header[13]) << 16) |
66	(((uint64_t)header[14]) << 8) |
67	((uint64_t)header[15]);
68	}
69
70	static inline uint32_t hwsync_header_get_size(uint8_t *header)
71	{
72	return (((uint32_t)header[4]) << 24) |
73	(((uint32_t)header[5]) << 16) |
74	(((uint32_t)header[6]) << 8) |
75	((uint32_t)header[7]);
76	}
77
78	static inline uint64_t get_pts_gap(uint64_t a, uint64_t b)
79	{
80	if (a >= b)
81	return (a - b);
82	else
83	return (b - a);
84	}
85
86	void aml_audio_hwsync_init(audio_hwsync_t *p_hwsync);
87	int aml_audio_hwsync_find_frame(audio_hwsync_t *p_hwsync,
88	const void *in_buffer, size_t in_bytes, uint64_t *cur_pts, int *outsize);
89	int aml_audio_hwsync_set_first_pts(audio_hwsync_t *p_hwsync, uint64_t pts);
90	#endif
91