xref: /frameworks/wilhelm/src/desktop/SDL.cpp

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* SDL platform implementation */

#include <assert.h>

#include "sles_allinclusive.h"

#ifdef USE_SDL

static void SDLCALL SDL_callback(void *context, Uint8 *stream, int len)
{
    assert(len > 0);
    SLOutputMixExtItf OutputMixExt = (SLOutputMixExtItf) context;
    (*OutputMixExt)->FillBuffer(OutputMixExt, stream, (SLuint32) len);
}

void SDL_start(SLObjectItf self)
{
    assert(self != NULL);
    IObject *this = (IObject *) self;
    assert(SL_OBJECTID_OUTPUTMIX == IObjectToObjectID(this));
    SLresult result;
    SLOutputMixExtItf OutputMixExt;
    result = (*self)->GetInterface(self, SL_IID_OUTPUTMIXEXT, &OutputMixExt);
    assert(SL_RESULT_SUCCESS == result);

    SDL_AudioSpec fmt;
    fmt.freq = 44100;
    fmt.format = AUDIO_S16;
    fmt.channels = 2;
    fmt.samples = 256;
    fmt.callback = SDL_callback;
    // FIXME should be a GetInterface
    // fmt.userdata = &((COutputMix *) this)->mOutputMixExt;
    fmt.userdata = (void *) OutputMixExt;

    if (SDL_OpenAudio(&fmt, NULL) < 0) {
        fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError());
        exit(1);
    }
    SDL_PauseAudio(0);
}

#endif // USE_SDL