path: root/audio_hwsync.h (plain)
blob: b65e2ad179ac8c628ca8a20d1e79c9a559ac2600

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 HW_SYNC_HEADER_CNT 20
34
35	#define APTS_DISCONTINUE_THRESHOLD (90000)
36	#define APTS_DISCONTINUE_THRESHOLD_MIN (90000/1000*100)
37	#define APTS_DISCONTINUE_THRESHOLD_MAX (5*90000)
38
39	typedef struct audio_hwsync {
40	uint8_t hw_sync_header[HW_SYNC_HEADER_CNT];
41	size_t hw_sync_header_cnt;
42	int hw_sync_state;
43	uint32_t hw_sync_body_cnt;
44	uint32_t hw_sync_frame_size;
45	uint8_t hw_sync_body_buf[8192];
46	uint8_t body_align[64];
47	uint8_t body_align_cnt;
48	bool first_apts_flag;//flag to indicate set first apts
49	uint64_t first_apts;
50	uint64_t last_apts_from_header;
51	} audio_hwsync_t;
52	static inline bool hwsync_header_valid(uint8_t *header)
53	{
54	return (header[0] == 0x55) &&
55	(header[1] == 0x55) &&
56	(header[2] == 0x00) &&
57	//(header[3] == 0x01 || header[3] == 0x02);
58	(header[3] == 0x02);
59	}
60
61	static inline uint64_t hwsync_header_get_pts(uint8_t *header)
62	{
63	return (((uint64_t)header[8]) << 56) |
64	(((uint64_t)header[9]) << 48) |
65	(((uint64_t)header[10]) << 40) |
66	(((uint64_t)header[11]) << 32) |
67	(((uint64_t)header[12]) << 24) |
68	(((uint64_t)header[13]) << 16) |
69	(((uint64_t)header[14]) << 8) |
70	((uint64_t)header[15]);
71	}
72
73	static inline uint32_t hwsync_header_get_size(uint8_t *header)
74	{
75	return (((uint32_t)header[4]) << 24) |
76	(((uint32_t)header[5]) << 16) |
77	(((uint32_t)header[6]) << 8) |
78	((uint32_t)header[7]);
79	}
80
81	static inline uint64_t get_pts_gap(uint64_t a, uint64_t b)
82	{
83	if (a >= b)
84	return (a - b);
85	else
86	return (b - a);
87	}
88
89	void aml_audio_hwsync_init(audio_hwsync_t *p_hwsync);
90	int aml_audio_hwsync_find_frame(audio_hwsync_t *p_hwsync,
91	const void *in_buffer, size_t in_bytes, uint64_t *cur_pts, int *outsize);
92	int aml_audio_hwsync_set_first_pts(audio_hwsync_t *p_hwsync, uint64_t pts);
93	#endif
94