quake: migrate to SDL_mixer and add background music

Kind of skippy and only supports WAV. MP3 would be nice, especially if
using Rockbox's codec.

Change-Id: I0bba195603da32da1e4d1dcf2ee821fa5696824a

1 files changed, 24 insertions, 32 deletions

diff --git a/apps/plugins/sdl/progs/quake/snd_sdl.c b/apps/plugins/sdl/progs/quake/snd_sdl.c
index 644d4e1acf..5ebf081241 100644
--- a/apps/plugins/sdl/progs/quake/snd_sdl.c
+++ b/apps/plugins/sdl/progs/quake/snd_sdl.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include "SDL_audio.h"
 #include "SDL_byteorder.h"
+#include "SDL_mixer.h"
 #include "quakedef.h"
 
 static dma_t the_shm;
@@ -11,7 +12,7 @@ extern int desired_speed;
 extern int desired_bits;
 
 // SDL hereby demands `len' samples in stream, *NOW*!
-static void paint_audio(void *unused, Uint8 *stream, int len)
+static void paint_audio(int chan, Uint8 *stream, int len, void *unused)
 {
         if ( shm ) {
                 shm->buffer = stream;
@@ -46,49 +47,40 @@ qboolean SNDDMA_Init(void)
         }
         desired.channels = 2;
         desired.samples = 1024;
-        desired.callback = paint_audio;
+        //desired.callback = paint_audio;
 
+        if( Mix_OpenAudio(desired_speed, desired.format, desired.channels, desired.samples) < 0 )
+        {
+            Con_Printf("Couldn't open SDL audio: %s\n", Mix_GetError());
+            return 0;
+        }
+
+        Mix_RegisterEffect(0, paint_audio, NULL, NULL);
+
+#if 0
         /* Open the audio device */
         if ( SDL_OpenAudio(&desired, &obtained) < 0 ) {
                 Con_Printf("Couldn't open SDL audio: %s\n", SDL_GetError());
                 return 0;
         }
+#endif
+
+        void *blank_buf = (Uint8 *)malloc(4096);
+        memset(blank_buf, 0, 4096);
+
+        Mix_Chunk *blank = Mix_QuickLoad_RAW(blank_buf, 4096);
+
+        Mix_PlayChannel(0, blank, -1);
 
-        /* Make sure we can support the audio format */
-        switch (obtained.format) {
-                case AUDIO_U8:
-                        /* Supported */
-                        break;
-                case AUDIO_S16LSB:
-                case AUDIO_S16MSB:
-                        if ( ((obtained.format == AUDIO_S16LSB) &&
-                             (SDL_BYTEORDER == SDL_LIL_ENDIAN)) ||
-                             ((obtained.format == AUDIO_S16MSB) &&
-                             (SDL_BYTEORDER == SDL_BIG_ENDIAN)) ) {
-                                /* Supported */
-                                break;
-                        }
-                        /* Unsupported, fall through */;
-                default:
-                        /* Not supported -- force SDL to do our bidding */
-                        SDL_CloseAudio();
-                        if ( SDL_OpenAudio(&desired, NULL) < 0 ) {
-                                Con_Printf("Couldn't open SDL audio: %s\n",
-                                                        SDL_GetError());
-                                return 0;
-                        }
-                        memcpy(&obtained, &desired, sizeof(desired));
-                        break;
-        }
         SDL_PauseAudio(0);
 
         /* Fill the audio DMA information block */
         shm = &the_shm;
         shm->splitbuffer = 0;
-        shm->samplebits = (obtained.format & 0xFF);
-        shm->speed = obtained.freq;
-        shm->channels = obtained.channels;
-        shm->samples = obtained.samples*shm->channels;
+        shm->samplebits = (desired.format & 0xFF);
+        shm->speed = desired.freq;
+        shm->channels = desired.channels;
+        shm->samples = desired.samples*shm->channels;
         shm->samplepos = 0;
         shm->submission_chunk = 1;
         shm->buffer = NULL;