int32 support for windib and windx5 audio backends.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402055

src/audio/windib/SDL_dibaudio.c

@@ -248,7 +248,7 @@ DIB_OpenAudio(_THIS, SDL_AudioSpec * spec)
     waveformat.wFormatTag = WAVE_FORMAT_PCM;
 
     /* Determine the audio parameters from the AudioSpec */
-    switch (spec->format & 0xFF) {
+    switch (SDL_AUDIO_BITSIZE(spec->format)) {
     case 8:
         /* Unsigned 8 bit audio data */
         spec->format = AUDIO_U8;
@@ -259,6 +259,11 @@ DIB_OpenAudio(_THIS, SDL_AudioSpec * spec)
         spec->format = AUDIO_S16;
         waveformat.wBitsPerSample = 16;
         break;
+    case 16:
+        /* Signed 32 bit audio data */
+        spec->format = AUDIO_S32;
+        waveformat.wBitsPerSample = 32;
+        break;
     default:
         SDL_SetError("Unsupported audio format");
         return (-1);

src/audio/windx5/SDL_dx5audio.c

@@ -658,7 +658,7 @@ DX5_OpenAudio(_THIS, SDL_AudioSpec * spec)
     waveformat.wFormatTag = WAVE_FORMAT_PCM;
 
     /* Determine the audio parameters from the AudioSpec */
-    switch (spec->format & 0xFF) {
+    switch (SDL_AUDIO_BITSIZE(spec->format)) {
     case 8:
         /* Unsigned 8 bit audio data */
         spec->format = AUDIO_U8;
@@ -671,6 +671,12 @@ DX5_OpenAudio(_THIS, SDL_AudioSpec * spec)
         silence = 0x00;
         waveformat.wBitsPerSample = 16;
         break;
+    case 32:
+        /* Signed 32 bit audio data */
+        spec->format = AUDIO_S32;
+        silence = 0x00;
+        waveformat.wBitsPerSample = 32;
+        break;
     default:
         SDL_SetError("Unsupported audio format");
         return (-1);