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root/cebix/Frodo4/Src/SID_Be.h
Revision: 1.2
Committed: 2003-07-01T17:51:17Z (19 years, 7 months ago) by cebix
Content type: text/plain
Branch: MAIN
Changes since 1.1: +1 -1 lines
Log Message:
updated copyright date

File Contents

# User Rev Content
1 cebix 1.1 /*
2     * SID_Be.h - 6581 emulation, Be specific stuff
3     *
4 cebix 1.2 * Frodo (C) 1994-1997,2002-2003 Christian Bauer
5 cebix 1.1 *
6     * This program is free software; you can redistribute it and/or modify
7     * it under the terms of the GNU General Public License as published by
8     * the Free Software Foundation; either version 2 of the License, or
9     * (at your option) any later version.
10     *
11     * This program is distributed in the hope that it will be useful,
12     * but WITHOUT ANY WARRANTY; without even the implied warranty of
13     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14     * GNU General Public License for more details.
15     *
16     * You should have received a copy of the GNU General Public License
17     * along with this program; if not, write to the Free Software
18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19     */
20    
21     #include <MediaKit.h>
22    
23     #include "C64.h"
24    
25    
26     /*
27     * Initialization, open subscriber
28     */
29    
30     void DigitalRenderer::init_sound(void)
31     {
32     in_stream = false;
33    
34     the_stream = new BDACStream();
35     the_sub = new BSubscriber("Frodo SID emulation");
36     ready = the_sub->Subscribe(the_stream) == B_NO_ERROR;
37     if (ready) {
38     the_stream->SetSamplingRate(SAMPLE_FREQ);
39     the_stream->SetStreamBuffers(SAMPLE_FREQ / CALC_FREQ * 4, 4); // Must be called after EnterStream()
40     the_sub->EnterStream(NULL, true, this, stream_func, NULL, true);
41     in_stream = true;
42     }
43     }
44    
45    
46     /*
47     * Destructor, close subscriber
48     */
49    
50     DigitalRenderer::~DigitalRenderer()
51     {
52     if (ready) {
53     if (in_stream) {
54     the_sub->ExitStream(true);
55     in_stream = false;
56     }
57     the_stream->SetStreamBuffers(4096, 8);
58     the_sub->Unsubscribe();
59     ready = false;
60     }
61     delete the_sub;
62     delete the_stream;
63     }
64    
65    
66     /*
67     * Sample volume (for sampled voice)
68     */
69    
70     void DigitalRenderer::EmulateLine(void)
71     {
72     sample_buf[sample_in_ptr] = volume;
73     sample_in_ptr = (sample_in_ptr + 1) % SAMPLE_BUF_SIZE;
74     }
75    
76    
77     /*
78     * Pause sound output
79     */
80    
81     void DigitalRenderer::Pause(void)
82     {
83     if (in_stream) {
84     the_sub->ExitStream(true);
85     in_stream = false;
86     }
87     }
88    
89    
90     /*
91     * Resume sound output
92     */
93    
94     void DigitalRenderer::Resume(void)
95     {
96     if (!in_stream) {
97     the_sub->EnterStream(NULL, true, this, stream_func, NULL, true);
98     in_stream = true;
99     }
100     }
101    
102    
103     /*
104     * Stream function
105     */
106    
107     bool DigitalRenderer::stream_func(void *arg, char *buf, size_t count, void *header)
108     {
109     ((DigitalRenderer *)arg)->calc_buffer((int16 *)buf, count);
110     ((DigitalRenderer *)arg)->the_c64->SoundSync();
111     return true;
112     }