Atlas - SDL_dummyaudio.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "../../SDL_internal.h"
22
23/* Output audio to nowhere... */
24
25#include "SDL_timer.h"
26#include "SDL_audio.h"
27#include "../SDL_audio_c.h"
28#include "SDL_dummyaudio.h"
29
30static int
31DUMMYAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
32{
33    return 0;                   /* always succeeds. */
34}
35
36static int
37DUMMYAUDIO_CaptureFromDevice(_THIS, void *buffer, int buflen)
38{
39    /* Delay to make this sort of simulate real audio input. */
40    SDL_Delay((this->spec.samples * 1000) / this->spec.freq);
41
42    /* always return a full buffer of silence. */
43    SDL_memset(buffer, this->spec.silence, buflen);
44    return buflen;
45}
46
47static int
48DUMMYAUDIO_Init(SDL_AudioDriverImpl * impl)
49{
50    /* Set the function pointers */
51    impl->OpenDevice = DUMMYAUDIO_OpenDevice;
52    impl->CaptureFromDevice = DUMMYAUDIO_CaptureFromDevice;
53
54    impl->OnlyHasDefaultOutputDevice = 1;
55    impl->OnlyHasDefaultCaptureDevice = 1;
56    impl->HasCaptureSupport = SDL_TRUE;
57
58    return 1;   /* this audio target is available. */
59}
60
61AudioBootStrap DUMMYAUDIO_bootstrap = {
62    "dummy", "SDL dummy audio driver", DUMMYAUDIO_Init, 1
63};
64
65/* vi: set ts=4 sw=4 expandtab: */
66
[FILE END]
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