[PATCH 1/6] winealsa: Remove alsa-pulse handle underrun workaround.

[Andrew Eikum]

Signed-off-by: Andrew Eikum <aeikum at codeweavers.com>

On Tue, Feb 15, 2022 at 01:09:48PM +0000, Huw Davies wrote:
> Pulse-based systems should be using winepulse.drv.
> 
> Signed-off-by: Huw Davies <huw at codeweavers.com>
> ---
>  dlls/winealsa.drv/mmdevdrv.c | 102 +----------------------------------
>  1 file changed, 1 insertion(+), 101 deletions(-)
> 
> diff --git a/dlls/winealsa.drv/mmdevdrv.c b/dlls/winealsa.drv/mmdevdrv.c
> index 5aa1b4aab63..9d051796765 100644
> --- a/dlls/winealsa.drv/mmdevdrv.c
> +++ b/dlls/winealsa.drv/mmdevdrv.c
> @@ -50,7 +50,6 @@
>  #include <alsa/asoundlib.h>
>  
>  WINE_DEFAULT_DEBUG_CHANNEL(alsa);
> -WINE_DECLARE_DEBUG_CHANNEL(winediag);
>  
>  #define NULL_PTR_ERR MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, RPC_X_NULL_REF_POINTER)
>  
> @@ -666,89 +665,6 @@ HRESULT WINAPI AUDDRV_GetEndpointIDs(EDataFlow flow, WCHAR ***ids, GUID **guids,
>      return S_OK;
>  }
>  
> -/* Using the pulse PCM device from alsa-plugins 1.0.24 triggers a bug
> - * which causes audio to cease playing after a few minutes of playback.
> - * Setting handle_underrun=1 on pulse-backed ALSA devices seems to work
> - * around this issue. */
> -static snd_config_t *make_handle_underrun_config(const char *name)
> -{
> -    snd_config_t *lconf, *dev_node, *hu_node, *type_node;
> -    char dev_node_name[260];
> -    const char *type_str;
> -    int err;
> -
> -    snd_config_update();
> -
> -    if((err = snd_config_copy(&lconf, snd_config)) < 0){
> -        WARN("snd_config_copy failed: %d (%s)\n", err, snd_strerror(err));
> -        return NULL;
> -    }
> -
> -    sprintf(dev_node_name, "pcm.%s", name);
> -    err = snd_config_search(lconf, dev_node_name, &dev_node);
> -    if(err == -ENOENT){
> -        snd_config_delete(lconf);
> -        return NULL;
> -    }
> -    if(err < 0){
> -        snd_config_delete(lconf);
> -        WARN("snd_config_search failed: %d (%s)\n", err, snd_strerror(err));
> -        return NULL;
> -    }
> -
> -    /* ALSA is extremely fragile. If it runs into a config setting it doesn't
> -     * recognize, it tends to fail or assert. So we only want to inject
> -     * handle_underrun=1 on devices that we know will recognize it. */
> -    err = snd_config_search(dev_node, "type", &type_node);
> -    if(err == -ENOENT){
> -        snd_config_delete(lconf);
> -        return NULL;
> -    }
> -    if(err < 0){
> -        snd_config_delete(lconf);
> -        WARN("snd_config_search failed: %d (%s)\n", err, snd_strerror(err));
> -        return NULL;
> -    }
> -
> -    if((err = snd_config_get_string(type_node, &type_str)) < 0){
> -        snd_config_delete(lconf);
> -        return NULL;
> -    }
> -
> -    if(strcmp(type_str, "pulse") != 0){
> -        snd_config_delete(lconf);
> -        return NULL;
> -    }
> -
> -    err = snd_config_search(dev_node, "handle_underrun", &hu_node);
> -    if(err >= 0){
> -        /* user already has an explicit handle_underrun setting, so don't
> -         * use a local config */
> -        snd_config_delete(lconf);
> -        return NULL;
> -    }
> -    if(err != -ENOENT){
> -        snd_config_delete(lconf);
> -        WARN("snd_config_search failed: %d (%s)\n", err, snd_strerror(err));
> -        return NULL;
> -    }
> -
> -    if((err = snd_config_imake_integer(&hu_node, "handle_underrun", 1)) < 0){
> -        snd_config_delete(lconf);
> -        WARN("snd_config_imake_integer failed: %d (%s)\n", err,
> -                snd_strerror(err));
> -        return NULL;
> -    }
> -
> -    if((err = snd_config_add(dev_node, hu_node)) < 0){
> -        snd_config_delete(lconf);
> -        WARN("snd_config_add failed: %d (%s)\n", err, snd_strerror(err));
> -        return NULL;
> -    }
> -
> -    return lconf;
> -}
> -
>  static BOOL get_alsa_name_by_guid(GUID *guid, char *name, DWORD name_size, EDataFlow *flow)
>  {
>      HKEY devices_key;
> @@ -815,8 +731,6 @@ HRESULT WINAPI AUDDRV_GetAudioEndpoint(GUID *guid, IMMDevice *dev, IAudioClient
>      ACImpl *This;
>      int err;
>      snd_pcm_stream_t stream;
> -    snd_config_t *lconf;
> -    static BOOL handle_underrun = TRUE;
>      char alsa_name[256];
>      EDataFlow dataflow;
>      HRESULT hr;
> @@ -853,21 +767,7 @@ HRESULT WINAPI AUDDRV_GetAudioEndpoint(GUID *guid, IMMDevice *dev, IAudioClient
>      }
>  
>      This->dataflow = dataflow;
> -    if(handle_underrun && ((lconf = make_handle_underrun_config(alsa_name)))){
> -        err = snd_pcm_open_lconf(&This->pcm_handle, alsa_name, stream, SND_PCM_NONBLOCK, lconf);
> -        TRACE("Opening PCM device \"%s\" with handle_underrun: %d\n", alsa_name, err);
> -        snd_config_delete(lconf);
> -        /* Pulse <= 2010 returns EINVAL, it does not know handle_underrun. */
> -        if(err == -EINVAL){
> -            ERR_(winediag)("PulseAudio \"%s\" %d without handle_underrun. Audio may hang."
> -                           " Please upgrade to alsa_plugins >= 1.0.24\n", alsa_name, err);
> -            handle_underrun = FALSE;
> -        }
> -    }else
> -        err = -EINVAL;
> -    if(err == -EINVAL){
> -        err = snd_pcm_open(&This->pcm_handle, alsa_name, stream, SND_PCM_NONBLOCK);
> -    }
> +    err = snd_pcm_open(&This->pcm_handle, alsa_name, stream, SND_PCM_NONBLOCK);
>      if(err < 0){
>          HeapFree(GetProcessHeap(), 0, This);
>          WARN("Unable to open PCM \"%s\": %d (%s)\n", alsa_name, err, snd_strerror(err));
> -- 
> 2.25.1
> 
>