kc3-lang/SDL/src/audio/pulseaudio/SDL_pulseaudio.h

• Show log

  Commit

• Hash : f6eb4b07
  Author :
  Date : 2022-04-26T13:14:15
  

  pulseaudio: Feed audio data in response to write callbacks.
  
  Instead of waiting until the entire buffer from the SDL callback is ready
  to be accepted by PulseAudio, we use pa_stream_set_write_callback and
  feed some portion of the buffer as callbacks come in asking for more.
  
  This lets us remove the halving of the buffer size during device open,
  and also (hopefully) solves several strange hangs that happen in unusual
  circumstances.
  
  Fixes #4387
  Fixes #2262
  

Download

• src/audio/pulseaudio/SDL_pulseaudio.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2022 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_pulseaudio_h_
  #define SDL_pulseaudio_h_
  
  #include <pulse/simple.h>
  
  #include "../SDL_sysaudio.h"
  
  /* Hidden "this" pointer for the audio functions */
  #define _THIS SDL_AudioDevice *this
  
  struct SDL_PrivateAudioData
  {
      char *device_name;
  
      /* pulseaudio structures */
      pa_mainloop *mainloop;
      pa_context *context;
      pa_stream *stream;
  
      /* Raw mixing buffer */
      Uint8 *mixbuf;
      int mixlen;
  
      int bytes_requested;  /* bytes of data the hardware wants _now_. */
  
      const Uint8 *capturebuf;
      int capturelen;
  };
  
  #endif /* SDL_pulseaudio_h_ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

Download