[PATCH 2/2] winealsa: implement GetPropValue and return device path (try 3)

[Andrew Eikum]

These two patches look OK to me.

Andrew

On Wed, Nov 19, 2014 at 07:07:57PM +0000, Mark Harmstone wrote:
> ---
>  dlls/winealsa.drv/mmdevdrv.c        | 114 ++++++++++++++++++++++++++++++++++++
>  dlls/winealsa.drv/winealsa.drv.spec |   1 +
>  2 files changed, 115 insertions(+)
> 
> 

> diff --git a/dlls/winealsa.drv/mmdevdrv.c b/dlls/winealsa.drv/mmdevdrv.c
> index 5ad72f9..6b1456e 100644
> --- a/dlls/winealsa.drv/mmdevdrv.c
> +++ b/dlls/winealsa.drv/mmdevdrv.c
> @@ -3823,3 +3823,117 @@ HRESULT WINAPI AUDDRV_GetAudioSessionManager(IMMDevice *device,
>  
>      return S_OK;
>  }
> +
> +enum AudioDeviceConnectionType {
> +    AudioDeviceConnectionType_Unknown = 0,
> +    AudioDeviceConnectionType_PCI,
> +    AudioDeviceConnectionType_USB
> +};
> +
> +HRESULT WINAPI AUDDRV_GetPropValue(GUID *guid, const PROPERTYKEY *prop, PROPVARIANT *out)
> +{
> +    static const PROPERTYKEY devicepath_key = { /* undocumented? - {b3f8fa53-0004-438e-9003-51a46e139bfc},2 */
> +        {0xb3f8fa53, 0x0004, 0x438e, {0x90, 0x03, 0x51, 0xa4, 0x6e, 0x13, 0x9b, 0xfc}}, 2
> +    };
> +
> +    TRACE("%s, (%s,%u), %p\n", wine_dbgstr_guid(guid), wine_dbgstr_guid(&prop->fmtid), prop->pid, out);
> +
> +    if(IsEqualPropertyKey(*prop, devicepath_key))
> +    {
> +        char name[256], uevent[MAX_PATH];
> +        EDataFlow flow;
> +        FILE *fuevent;
> +        int card, device;
> +
> +        if(!get_alsa_name_by_guid(guid, name, sizeof(name), &flow))
> +        {
> +            WARN("Unknown interface %s\n", debugstr_guid(guid));
> +            return E_NOINTERFACE;
> +        }
> +
> +        /* only implemented for identifiable devices, i.e. not "default" */
> +        if(!sscanf(name, "plughw:%u,%u", &card, &device))
> +            return E_NOTIMPL;
> +
> +        sprintf(uevent, "/sys/class/sound/card%u/device/uevent", card);
> +        fuevent = fopen(uevent, "r");
> +
> +        if(fuevent){
> +            enum AudioDeviceConnectionType connection = AudioDeviceConnectionType_Unknown;
> +            USHORT vendor_id = 0, product_id = 0;
> +            char *line = NULL;
> +
> +            while(!feof(fuevent)) {
> +                char *val;
> +                size_t val_len, len = 0;
> +
> +                if(getline(&line, &len, fuevent)<0)
> +                    break;
> +
> +                if((val = strchr(line, '='))) {
> +                    val[0] = 0;
> +                    val++;
> +
> +                    val_len = strlen(val);
> +                    if(val_len > 0 && val[val_len - 1] == '\n') { val[val_len - 1] = 0; }
> +
> +                    if(!strcmp(line, "PCI_ID")){
> +                        connection = AudioDeviceConnectionType_PCI;
> +                        if(sscanf(val, "%hX:%hX", &vendor_id, &product_id)<2){
> +                            WARN("Unexpected input when reading PCI_ID in uevent file.\n");
> +                            connection = AudioDeviceConnectionType_Unknown;
> +                            break;
> +                        }
> +                    }else if(!strcmp(line, "DEVTYPE") && !strcmp(val,"usb_interface"))
> +                        connection = AudioDeviceConnectionType_USB;
> +                    else if(!strcmp(line, "PRODUCT"))
> +                        if(sscanf(val, "%hx/%hx/", &vendor_id, &product_id)<2){
> +                            WARN("Unexpected input when reading PRODUCT in uevent file.\n");
> +                            connection = AudioDeviceConnectionType_Unknown;
> +                            break;
> +                        }
> +                }
> +            }
> +
> +            if(line)
> +                free(line);
> +
> +            fclose(fuevent);
> +
> +            if(connection == AudioDeviceConnectionType_USB || connection == AudioDeviceConnectionType_PCI){
> +                static const WCHAR usbformatW[] = { '{','1','}','.','U','S','B','\\','V','I','D','_',
> +                    '%','0','4','X','&','P','I','D','_','%','0','4','X','\\',
> +                    '%','u','&','%','0','8','X',0 }; /* "{1}.USB\VID_%04X&PID_%04X\%u&%08X" */
> +                static const WCHAR pciformatW[] = { '{','1','}','.','H','D','A','U','D','I','O','\\','F','U','N','C','_','0','1','&',
> +                    'V','E','N','_','%','0','4','X','&','D','E','V','_',
> +                    '%','0','4','X','\\','%','u','&','%','0','8','X',0 }; /* "{1}.HDAUDIO\FUNC_01&VEN_%04X&DEV_%04X\%u&%08X" */
> +                UINT serial_number;
> +
> +                /* As hardly any audio devices have serial numbers, Windows instead
> +                appears to use a persistent random number. We emulate this here
> +                by instead using the last 8 hex digits of the GUID. */
> +                serial_number = (guid->Data4[4] << 24) | (guid->Data4[5] << 16) | (guid->Data4[6] << 8) | guid->Data4[7];
> +
> +                out->vt = VT_LPWSTR;
> +                out->u.pwszVal = CoTaskMemAlloc(128 * sizeof(WCHAR));
> +
> +                if(!out->u.pwszVal)
> +                    return E_OUTOFMEMORY;
> +
> +                if(connection == AudioDeviceConnectionType_USB)
> +                    sprintfW( out->u.pwszVal, usbformatW, vendor_id, product_id, device, serial_number);
> +                else if(connection == AudioDeviceConnectionType_PCI)
> +                    sprintfW( out->u.pwszVal, pciformatW, vendor_id, product_id, device, serial_number);
> +
> +                return S_OK;
> +            }
> +        }else{
> +            WARN("Could not open %s for reading\n", uevent);
> +            return E_NOTIMPL;
> +        }
> +    }
> +
> +    TRACE("Unimplemented property %s,%u\n", wine_dbgstr_guid(&prop->fmtid), prop->pid);
> +
> +    return E_NOTIMPL;
> +}
> diff --git a/dlls/winealsa.drv/winealsa.drv.spec b/dlls/winealsa.drv/winealsa.drv.spec
> index 04fa05a..bd83ea2 100644
> --- a/dlls/winealsa.drv/winealsa.drv.spec
> +++ b/dlls/winealsa.drv/winealsa.drv.spec
> @@ -8,3 +8,4 @@
>  @ stdcall -private GetEndpointIDs(long ptr ptr ptr ptr) AUDDRV_GetEndpointIDs
>  @ stdcall -private GetAudioEndpoint(ptr ptr ptr) AUDDRV_GetAudioEndpoint
>  @ stdcall -private GetAudioSessionManager(ptr ptr) AUDDRV_GetAudioSessionManager
> +@ stdcall -private GetPropValue(ptr ptr ptr) AUDDRV_GetPropValue
> 

>