[vlc-devel] [PATCH] aout: wasapi: disable deferred start for Winstore builds

[Jean-Baptiste Kempf]

Hello,

I think this is bad: we should not ifdef in WASAPI for WinRT, as much as possible.

On Wed, Apr 8, 2020, at 14:54, Steve Lhomme wrote:
> The timer API is not supported.
> 
> Using vlc_timer_schedule() might work but is heavier/slower as it's using
> posix/timer.c which uses a thread to run the callback.
> ---
>  modules/audio_output/wasapi.c | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/modules/audio_output/wasapi.c b/modules/audio_output/wasapi.c
> index 5180e93f8e8..61b6cc13d6f 100644
> --- a/modules/audio_output/wasapi.c
> +++ b/modules/audio_output/wasapi.c
> @@ -91,7 +91,9 @@ static msftime_t GetQPC(void)
>  typedef struct aout_stream_sys
>  {
>      IAudioClient *client;
> +#if !VLC_WINSTORE_APP
>      HANDLE hTimer;
> +#endif // !VLC_WINSTORE_APP
>  
>  #define STARTED_STATE_INIT 0
>  #define STARTED_STATE_OK 1
> @@ -111,12 +113,16 @@ typedef struct aout_stream_sys
>  
>  static void ResetTimer(aout_stream_t *s)
>  {
> +#if !VLC_WINSTORE_APP
>      aout_stream_sys_t *sys = s->sys;
>      if (sys->hTimer != NULL)
>      {
>          DeleteTimerQueueTimer(NULL, sys->hTimer, INVALID_HANDLE_VALUE);
>          sys->hTimer = NULL;
>      }
> +#else // VLC_WINSTORE_APP
> +    VLC_UNUSED(s);
> +#endif // VLC_WINSTORE_APP
>  }
>  
>  /*** VLC audio output callbacks ***/
> @@ -160,6 +166,7 @@ static HRESULT TimeGet(aout_stream_t *s, vlc_tick_t 
> *restrict delay)
>      return hr;
>  }
>  
> +#if !VLC_WINSTORE_APP
>  static void CALLBACK StartDeferredCallback(void *val, BOOLEAN timeout)
>  {
>      aout_stream_t *s = val;
> @@ -170,15 +177,17 @@ static void CALLBACK StartDeferredCallback(void 
> *val, BOOLEAN timeout)
>                   SUCCEEDED(hr) ? STARTED_STATE_OK : 
> STARTED_STATE_ERROR);
>      (void) timeout;
>  }
> +#endif // !VLC_WINSTORE_APP
>  
>  static HRESULT StartDeferred(aout_stream_t *s, vlc_tick_t date)
>  {
>      aout_stream_sys_t *sys = s->sys;
>      vlc_tick_t written = vlc_tick_from_frac(sys->written, sys->rate);
>      vlc_tick_t start_delay = date - vlc_tick_now() - written;
> -    DWORD start_delay_ms = start_delay > 0 ? MS_FROM_VLC_TICK(start_delay) : 0;
>      BOOL timer_updated = false;
>  
> +#if !VLC_WINSTORE_APP
> +    DWORD start_delay_ms = start_delay > 0 ? 
> MS_FROM_VLC_TICK(start_delay) : 0;
>      /* Create or update the current timer */
>      if (start_delay_ms > 0)
>      {
> @@ -195,6 +204,7 @@ static HRESULT StartDeferred(aout_stream_t *s, 
> vlc_tick_t date)
>      }
>      else
>          ResetTimer(s);
> +#endif
>  
>      if (!timer_updated)
>      {
> @@ -747,7 +757,9 @@ static HRESULT Start(aout_stream_t *s, 
> audio_sample_format_t *restrict pfmt,
>      if (unlikely(sys == NULL))
>          return E_OUTOFMEMORY;
>      sys->client = NULL;
> +#if !VLC_WINSTORE_APP
>      sys->hTimer = NULL;
> +#endif // !VLC_WINSTORE_APP
>      atomic_init(&sys->started_state, STARTED_STATE_INIT);
>  
>      /* Configure audio stream */
> -- 
> 2.17.1
> 
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-- 
Jean-Baptiste Kempf -  President
+33 672 704 734