/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"

#ifndef SDL_ALSA_audio_h_
#define SDL_ALSA_audio_h_

#include <alsa/asoundlib.h>

#include "../SDL_sysaudio.h"

#define SDL_AUDIO_ALSA__CHMAP_CHANS_N_MAX    8
#define SDL_AUDIO_ALSA__SDL_CHMAPS_N         9 // from 0 channels to 8 channels
struct SDL_PrivateAudioData
{
    // The audio device handle
    snd_pcm_t *pcm;

    // Raw mixing buffer
    Uint8 *mixbuf;

    // swizzle function
    void (*swizzle_func)(SDL_AudioDevice *_this, void *buffer, Uint32 bufferlen);
    // Up to a channel map of 8 channels, will define the sample indexes into the alsa frame
    // from a sdl sample index.
    int swizzle_map[SDL_AUDIO_ALSA__CHMAP_CHANS_N_MAX]; 
};

#endif // SDL_ALSA_audio_h_