src/audio/dummy/SDL_dummyaudio.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 03 Jan 2018 10:03:25 -0800
changeset 11811 5d94cb6b24d3
parent 10737 3406a0f8b041
child 12503 806492103856
permissions -rw-r--r--
Updated copyright for 2018
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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/* Output audio to nowhere... */
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "../SDL_audio_c.h"
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#include "SDL_dummyaudio.h"
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static int
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DUMMYAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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{
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    return 0;                   /* always succeeds. */
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}
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static int
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DUMMYAUDIO_CaptureFromDevice(_THIS, void *buffer, int buflen)
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{
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    /* Delay to make this sort of simulate real audio input. */
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    SDL_Delay((this->spec.samples * 1000) / this->spec.freq);
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    /* always return a full buffer of silence. */
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    SDL_memset(buffer, this->spec.silence, buflen);
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    return buflen;
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}
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static int
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DUMMYAUDIO_Init(SDL_AudioDriverImpl * impl)
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{
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    /* Set the function pointers */
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    impl->OpenDevice = DUMMYAUDIO_OpenDevice;
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    impl->CaptureFromDevice = DUMMYAUDIO_CaptureFromDevice;
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    impl->OnlyHasDefaultOutputDevice = 1;
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    impl->OnlyHasDefaultCaptureDevice = 1;
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    impl->HasCaptureSupport = SDL_TRUE;
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    return 1;   /* this audio target is available. */
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}
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AudioBootStrap DUMMYAUDIO_bootstrap = {
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    "dummy", "SDL dummy audio driver", DUMMYAUDIO_Init, 1
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};
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/* vi: set ts=4 sw=4 expandtab: */