1 /* public domain */
2
3 #include "qemu/osdep.h"
4 #include "qemu-common.h"
5
6 #define AUDIO_CAP "win-int"
7 #include <windows.h>
8 #include <mmsystem.h>
9
10 #include "audio.h"
11 #include "audio_int.h"
12 #include "audio_win_int.h"
13
waveformat_from_audio_settings(WAVEFORMATEX * wfx,struct audsettings * as)14 int waveformat_from_audio_settings (WAVEFORMATEX *wfx,
15 struct audsettings *as)
16 {
17 memset (wfx, 0, sizeof (*wfx));
18
19 wfx->wFormatTag = WAVE_FORMAT_PCM;
20 wfx->nChannels = as->nchannels;
21 wfx->nSamplesPerSec = as->freq;
22 wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);
23 wfx->nBlockAlign = 1 << (as->nchannels == 2);
24 wfx->cbSize = 0;
25
26 switch (as->fmt) {
27 case AUDIO_FORMAT_S8:
28 case AUDIO_FORMAT_U8:
29 wfx->wBitsPerSample = 8;
30 break;
31
32 case AUDIO_FORMAT_S16:
33 case AUDIO_FORMAT_U16:
34 wfx->wBitsPerSample = 16;
35 wfx->nAvgBytesPerSec <<= 1;
36 wfx->nBlockAlign <<= 1;
37 break;
38
39 case AUDIO_FORMAT_S32:
40 case AUDIO_FORMAT_U32:
41 wfx->wBitsPerSample = 32;
42 wfx->nAvgBytesPerSec <<= 2;
43 wfx->nBlockAlign <<= 2;
44 break;
45
46 default:
47 dolog ("Internal logic error: Bad audio format %d\n", as->freq);
48 return -1;
49 }
50
51 return 0;
52 }
53
waveformat_to_audio_settings(WAVEFORMATEX * wfx,struct audsettings * as)54 int waveformat_to_audio_settings (WAVEFORMATEX *wfx,
55 struct audsettings *as)
56 {
57 if (wfx->wFormatTag != WAVE_FORMAT_PCM) {
58 dolog ("Invalid wave format, tag is not PCM, but %d\n",
59 wfx->wFormatTag);
60 return -1;
61 }
62
63 if (!wfx->nSamplesPerSec) {
64 dolog ("Invalid wave format, frequency is zero\n");
65 return -1;
66 }
67 as->freq = wfx->nSamplesPerSec;
68
69 switch (wfx->nChannels) {
70 case 1:
71 as->nchannels = 1;
72 break;
73
74 case 2:
75 as->nchannels = 2;
76 break;
77
78 default:
79 dolog (
80 "Invalid wave format, number of channels is not 1 or 2, but %d\n",
81 wfx->nChannels
82 );
83 return -1;
84 }
85
86 switch (wfx->wBitsPerSample) {
87 case 8:
88 as->fmt = AUDIO_FORMAT_U8;
89 break;
90
91 case 16:
92 as->fmt = AUDIO_FORMAT_S16;
93 break;
94
95 case 32:
96 as->fmt = AUDIO_FORMAT_S32;
97 break;
98
99 default:
100 dolog ("Invalid wave format, bits per sample is not "
101 "8, 16 or 32, but %d\n",
102 wfx->wBitsPerSample);
103 return -1;
104 }
105
106 return 0;
107 }
108
109