1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* v4l2-mc.h - Media Controller V4L2 types and prototypes
*
* Copyright (C) 2016 Mauro Carvalho Chehab <mchehab@osg.samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _V4L2_MC_H
#define _V4L2_MC_H
#include <media/media-device.h>
#include <media/v4l2-dev.h>
/**
* enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER
*
* @TUNER_PAD_RF_INPUT: Radiofrequency (RF) sink pad, usually linked to a
* RF connector entity.
* @TUNER_PAD_OUTPUT: Tuner video output source pad. Contains the video
* chrominance and luminance or the hole bandwidth
* of the signal converted to an Intermediate Frequency
* (IF) or to baseband (on zero-IF tuners).
* @TUNER_PAD_AUD_OUT: Tuner audio output source pad. Tuners used to decode
* analog TV signals have an extra pad for audio output.
* Old tuners use an analog stage with a saw filter for
* the audio IF frequency. The output of the pad is, in
* this case, the audio IF, with should be decoded either
* by the bridge chipset (that's the case of cx2388x
* chipsets) or may require an external IF sound
* processor, like msp34xx. On modern silicon tuners,
* the audio IF decoder is usually incorporated at the
* tuner. On such case, the output of this pad is an
* audio sampled data.
* @TUNER_NUM_PADS: Number of pads of the tuner.
*/
enum tuner_pad_index {
TUNER_PAD_RF_INPUT,
TUNER_PAD_OUTPUT,
TUNER_PAD_AUD_OUT,
TUNER_NUM_PADS
};
/**
* enum if_vid_dec_index - video IF-PLL pad index for
* MEDIA_ENT_F_IF_VID_DECODER
*
* @IF_VID_DEC_PAD_IF_INPUT: video Intermediate Frequency (IF) sink pad
* @IF_VID_DEC_PAD_OUT: IF-PLL video output source pad. Contains the
* video chrominance and luminance IF signals.
* @IF_VID_DEC_PAD_NUM_PADS: Number of pads of the video IF-PLL.
*/
enum if_vid_dec_pad_index {
IF_VID_DEC_PAD_IF_INPUT,
IF_VID_DEC_PAD_OUT,
IF_VID_DEC_PAD_NUM_PADS
};
/**
* enum if_aud_dec_index - audio/sound IF-PLL pad index for
* MEDIA_ENT_F_IF_AUD_DECODER
*
* @IF_AUD_DEC_PAD_IF_INPUT: audio Intermediate Frequency (IF) sink pad
* @IF_AUD_DEC_PAD_OUT: IF-PLL audio output source pad. Contains the
* audio sampled stream data, usually connected
* to the bridge bus via an Inter-IC Sound (I2S)
* bus.
* @IF_AUD_DEC_PAD_NUM_PADS: Number of pads of the audio IF-PLL.
*/
enum if_aud_dec_pad_index {
IF_AUD_DEC_PAD_IF_INPUT,
IF_AUD_DEC_PAD_OUT,
IF_AUD_DEC_PAD_NUM_PADS
};
/**
* enum demod_pad_index - analog TV pad index for MEDIA_ENT_F_ATV_DECODER
*
* @DEMOD_PAD_IF_INPUT: IF input sink pad.
* @DEMOD_PAD_VID_OUT: Video output source pad.
* @DEMOD_PAD_VBI_OUT: Vertical Blank Interface (VBI) output source pad.
* @DEMOD_NUM_PADS: Maximum number of output pads.
*/
enum demod_pad_index {
DEMOD_PAD_IF_INPUT,
DEMOD_PAD_VID_OUT,
DEMOD_PAD_VBI_OUT,
DEMOD_NUM_PADS
};
/* We don't need to include pci.h or usb.h here */
struct pci_dev;
struct usb_device;
#ifdef CONFIG_MEDIA_CONTROLLER
/**
* v4l2_mc_create_media_graph() - create Media Controller links at the graph.
*
* @mdev: pointer to the &media_device struct.
*
* Add links between the entities commonly found on PC customer's hardware at
* the V4L2 side: camera sensors, audio and video PLL-IF decoders, tuners,
* analog TV decoder and I/O entities (video, VBI and Software Defined Radio).
* NOTE: webcams are modelled on a very simple way: the sensor is
* connected directly to the I/O entity. All dirty details, like
* scaler and crop HW are hidden. While such mapping is enough for v4l2
* interface centric PC-consumer's hardware, V4L2 subdev centric camera
* hardware should not use this routine, as it will not build the right graph.
*/
int v4l2_mc_create_media_graph(struct media_device *mdev);
/**
* v4l_enable_media_source() - Hold media source for exclusive use
* if free
*
* @vdev - poniter to struct video_device
*
* This interface calls enable_source handler to determine if
* media source is free for use. The enable_source handler is
* responsible for checking is the media source is free and
* start a pipeline between the media source and the media
* entity associated with the video device. This interface
* should be called from v4l2-core and dvb-core interfaces
* that change the source configuration.
*
* Return: returns zero on success or a negative error code.
*/
int v4l_enable_media_source(struct video_device *vdev);
/**
* v4l_disable_media_source() - Release media source
*
* @vdev - poniter to struct video_device
*
* This interface calls disable_source handler to release
* the media source. The disable_source handler stops the
* active media pipeline between the media source and the
* media entity associated with the video device.
*
* Return: returns zero on success or a negative error code.
*/
void v4l_disable_media_source(struct video_device *vdev);
/*
* v4l_vb2q_enable_media_tuner - Hold media source for exclusive use
* if free.
* @q - pointer to struct vb2_queue
*
* Wrapper for v4l_enable_media_source(). This function should
* be called from v4l2-core to enable the media source with
* pointer to struct vb2_queue as the input argument. Some
* v4l2-core interfaces don't have access to video device and
* this interface finds the struct video_device for the q and
* calls v4l_enable_media_source().
*/
int v4l_vb2q_enable_media_source(struct vb2_queue *q);
#else
static inline int v4l2_mc_create_media_graph(struct media_device *mdev)
{
return 0;
}
static int v4l_enable_media_source(struct video_device *vdev)
{
return 0;
}
static void v4l_disable_media_source(struct video_device *vdev)
{
return;
}
static int v4l_vb2q_enable_media_source(struct vb2_queue *q)
{
return 0;
}
#endif
#endif /* _V4L2_MC_H */
|
