kc3-lang/SDL/src/audio/aaudio/SDL_aaudio.h

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• Hash : 2423c514
  Author :
  Date : 2021-10-13T09:33:51
  

  Work around hang in AAudioStream_write() during extended shared object loading while running in a debugger. Observed on a OnePlus 8T (KB2005) running Oxygen OS 11.0.10.10.KB05AA.
  The observed behavior is that any nonzero timeout value would hang until the device was paused and resumed. And a zero timeout value would always return 0 frames written even when audio fragments could be heard. Making a manual timeout system unworkable.
  None of the straightforward systems imply that there's a detectable problem before the call to AAudioStream_write(). And the callback set within AAudioStreamBuilder_setErrorCallback() does not get called as we enter the hang state.
  I've found that AAudioStream_getTimestamp() will report an error state from another thread. So this change codifies that behavior a bit until a better fix or more root cause can be found.
  

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• src/audio/aaudio/SDL_aaudio.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2021 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_aaudio_h
  #define _SDL_aaudio_h
  
  #include "../SDL_sysaudio.h"
  #include <aaudio/AAudio.h>
  
  /* Hidden "this" pointer for the audio functions */
  #define _THIS   SDL_AudioDevice *this
  
  struct SDL_PrivateAudioData
  {
      AAudioStream *stream;
  
      /* Raw mixing buffer */
      Uint8 *mixbuf;
      int mixlen;
      int frame_size;
  
      /* Resume device if it was paused automatically */
      int resume;
  };
   
  void aaudio_ResumeDevices(void);
  void aaudio_PauseDevices(void);
  SDL_bool aaudio_DetectBrokenPlayState(void);
  
  
  #endif /* _SDL_aaudio_h */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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