1 //------------------------------------------------------------------------------
2 //
3 // EchoGals/Echo24 BeOS Driver for Echo audio cards
4 //
5 // Copyright (c) 2005, Jérôme Duval
6 //
7 // Permission is hereby granted, free of charge, to any person obtaining a
8 // copy of this software and associated documentation files (the "Software"),
9 // to deal in the Software without restriction, including without limitation
10 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 // and/or sell copies of the Software, and to permit persons to whom the
12 // Software is furnished to do so, subject to the following conditions:
13 //
14 // The above copyright notice and this permission notice shall be included in
15 // all copies or substantial portions of the Software.
16 //
17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 // DEALINGS IN THE SOFTWARE.
24
25 #include "echo.h"
26 #include "debug.h"
27 #include "midi_driver.h"
28
29 static status_t midi_open(const char *name, uint32 flags, void **cookie);
30 static status_t midi_close(void *cookie);
31 static status_t midi_free(void *cookie);
32 static status_t midi_control(void *cookie, uint32 op, void *data, size_t len);
33 static status_t midi_read(void *cookie, off_t pos, void *data, size_t *len);
34 static status_t midi_write(void *cookie, off_t pos, const void *data, size_t *len);
35
36
37 device_hooks midi_hooks = {
38 &midi_open,
39 &midi_close,
40 &midi_free,
41 &midi_control,
42 &midi_read,
43 &midi_write,
44 NULL, /* select */
45 NULL, /* deselect */
46 NULL, /* readv */
47 NULL /* writev */
48 };
49
50 static status_t
midi_open(const char * name,uint32 flags,void ** cookie)51 midi_open(const char* name, uint32 flags, void** cookie)
52 {
53 int ix;
54
55 LOG(("midi_open()\n"));
56
57 *cookie = NULL;
58 for (ix=0; ix<num_cards; ix++) {
59 if (!strcmp(name, cards[ix].midi.name)) {
60 break;
61 }
62 }
63 if (ix >= num_cards) {
64 LOG(("bad device\n"));
65 return ENODEV;
66 }
67
68 *cookie = &cards[ix];
69 atomic_add(&cards[ix].midi.count, 1);
70 memset(&cards[ix].midi.context, 0, sizeof(cards[ix].midi.context));
71 cards[ix].pEG->OpenMidiInput(&cards[ix].midi.context);
72 return B_OK;
73 }
74
75
76 static status_t
midi_close(void * cookie)77 midi_close(void* cookie)
78 {
79 LOG(("midi_close()\n"));
80 return B_OK;
81 }
82
83
84 static status_t
midi_free(void * cookie)85 midi_free(void* cookie)
86 {
87 echo_dev *card = (echo_dev *) cookie;
88
89 LOG(("midi_free()\n"));
90
91 card->pEG->CloseMidiInput(&card->midi.context);
92
93 atomic_add(&card->midi.count, -1);
94 LOG(("midi_free() done\n"));
95 return B_OK;
96 }
97
98
99 static status_t
midi_control(void * cookie,uint32 iop,void * data,size_t len)100 midi_control(void* cookie, uint32 iop, void* data, size_t len)
101 {
102 LOG(("midi_control()\n"));
103
104 return B_ERROR;
105 }
106
107
108 static status_t
midi_read(void * cookie,off_t pos,void * ptr,size_t * nread)109 midi_read(void* cookie, off_t pos, void* ptr, size_t* nread)
110 {
111 echo_dev *card = (echo_dev *) cookie;
112 ECHOSTATUS err;
113 DWORD midiData;
114 LONGLONG timestamp;
115 PBYTE next = (PBYTE)ptr;
116
117 LOG(("midi_read()\n"));
118
119 if (acquire_sem(card->midi.midi_ready_sem) != B_OK)
120 return B_ERROR;
121
122 err = card->pEG->ReadMidiByte(&card->midi.context, midiData, timestamp);
123 if (err == ECHOSTATUS_OK) {
124 *nread = 1;
125 *next = midiData;
126 LOG(("midi_read() : 0x%lx\n", *next));
127 return B_OK;
128 }
129 return B_ERROR;
130 }
131
132
133 static status_t
midi_write(void * cookie,off_t pos,const void * ptr,size_t * _nwritten)134 midi_write(void* cookie, off_t pos, const void* ptr, size_t* _nwritten)
135 {
136 echo_dev *card = (echo_dev *) cookie;
137 ECHOSTATUS err;
138 DWORD nwritten = *_nwritten;
139
140 LOG(("midi_write()\n"));
141
142 err = card->pEG->WriteMidi(nwritten, (PBYTE)ptr, &nwritten);
143 *_nwritten = nwritten;
144 return (err != ECHOSTATUS_OK) ? B_ERROR : B_OK;
145 }
146