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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* dv1394.cc
*
* Tue Apr 19 12:10:34 CEST 2005
* Copyright 2005 Bent Bisballe
* deva@aasimon.org
****************************************************************************/
/*
* 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 Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include "dv1394.h"
#include "dv.h"
#include <stdlib.h>
#include <memory.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
/**
* Callback function for the firewire interface.
*/
static int raw_reader( raw1394handle_t handle, int channel, size_t length, quadlet_t *data )
{
static char *framedata = NULL;
// Only process packets with reasonable length.
if ( length > 16 )
{
unsigned char * p = ( unsigned char* ) & data[ 3 ];
int section_type = p[ 0 ] >> 5; // section type is in bits 5 - 7
int dif_sequence = p[ 1 ] >> 4; // dif sequence number is in bits 4 - 7
int dif_block = p[ 2 ];
if ( section_type == 0 && dif_sequence == 0 )
{
if ( framedata != NULL )
{
raw1394_set_userdata(handle, (void *)framedata);
framedata = NULL;
}
}
if(!framedata)
{
framedata = (char *)malloc(DVPACKAGE_SIZE); // dvframe.h
if(!framedata)
{
// We're fucked
// errobj->pushError("Were fucked: %s.\n", strerror( errno ) );
exit(1);
}
}
switch ( section_type )
{
case 0: // 1 Header block
// p[3] |= 0x80; // hack to force PAL data
memcpy( framedata + dif_sequence * 150 * 80, p, 480 );
break;
case 1: // 2 Subcode blocks
memcpy( framedata + dif_sequence * 150 * 80 + ( 1 + dif_block ) * 80, p, 480 );
break;
case 2: // 3 VAUX blocks
memcpy( framedata + dif_sequence * 150 * 80 + ( 3 + dif_block ) * 80, p, 480 );
break;
case 3: // 9 Audio blocks interleaved with video
memcpy( framedata + dif_sequence * 150 * 80 + ( 6 + dif_block * 16 ) * 80, p, 480 );
break;
case 4: // 135 Video blocks interleaved with audio
memcpy( framedata + dif_sequence * 150 * 80 + ( 7 + ( dif_block / 15 ) + dif_block ) * 80, p, 480 );
break;
default: // we can't handle any other data
break;
}
}
return 0;
}
dv1394::dv1394(Error *e, int port, int channel)
{
errobj = e;
int n_ports;
struct raw1394_portinfo pinf[ 16 ];
// Get handle to firewire channels
handle = raw1394_new_handle();
if(!handle) {
errobj->pushError("raw1394 - failed to get handle: %s.", strerror( errno ) );
return;
}
// how many adapters are hooked in?
if((n_ports = raw1394_get_port_info(handle, pinf, 16)) < 0 ) {
errobj->pushError("raw1394 - failed to get port info: %s.", strerror( errno ) );
raw1394_destroy_handle(handle);
handle = NULL;
return;
}
// Tell raw1394 which host adapter to use
if(raw1394_set_port(handle, port) < 0 ) {
errobj->pushError("raw1394 - failed to set port: %s.", strerror( errno ) );
raw1394_destroy_handle(handle);
handle = NULL;
return;
}
raw1394_set_iso_handler( handle, channel, raw_reader);
raw1394_set_userdata( handle, ( void* ) NULL);
raw1394_start_iso_rcv( handle, channel);
}
dv1394::~dv1394()
{
// Close firewire connection.
raw1394_destroy_handle(handle);
}
unsigned char *dv1394::readFrame()
{
// Firewiare port not correctly opened.
if(!handle) return NULL;
unsigned char *ptr;
while(1) {
raw1394_loop_iterate(handle);
ptr = (unsigned char *)raw1394_get_userdata(handle);
if(ptr) {
raw1394_set_userdata(handle, NULL);
break;
}
}
return ptr;
}
|
