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

apps/plugins/sdl/SOURCES.quake

@@ -1,4 +1,4 @@
-progs/quake/cd_null.c
+progs/quake/cd_rockbox.c
 progs/quake/chase.c
 progs/quake/cl_demo.c
 progs/quake/cl_input.c

apps/plugins/sdl/include/SDL_config_rockbox.h

@@ -190,6 +190,8 @@
 #define EOF (-1)
 
 #define LOAD_XPM
+
+#define WAV_MUSIC
 #define MID_MUSIC
 #define USE_TIMIDITY_MIDI
 

apps/plugins/sdl/progs/quake/cd_rockbox.c

@@ -0,0 +1,123 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+/* Background music for Rockbox. Uses SDL_mixer and plays from
+ * /.rockbox/quake/%02d.wav */
+
+#include "quakedef.h"
+#include "SDL_mixer.h"
+
+#define MUSIC_DIR ROCKBOX_DIR "/quake"
+
+#if 1
+static Mix_Music *mus = NULL;
+#else
+static int musfile = -1;
+static int musfile_len, musfile_pos;
+
+#define MP3_CHUNK 1024*512
+
+static char mp3buf[MP3_CHUNK];
+
+static void get_mp3(const void **start, size_t *size)
+{
+    if(musfile >= 0)
+    {
+        int len = MIN(musfile_len - musfile_pos, MP3_CHUNK);
+
+        Sys_FileRead(musfile, mp3buf, len);
+        *start = mp3buf;
+        *size = len;
+
+        musfile_pos += len;
+    }
+}
+#endif
+
+void CDAudio_Play(byte track, qboolean looping)
+{
+    char path[MAX_PATH];
+    snprintf(path, sizeof(path), "%s/%02d.wav", MUSIC_DIR, track - 1);
+
+    rb->splashf(HZ, "playing %s", path);
+
+#if 1
+    mus = Mix_LoadMUS(path);
+
+    if(!mus)
+    {
+        rb->splashf(HZ, "Failed: %s", Mix_GetError());
+        return;
+    }
+
+    Mix_PlayMusic(mus, looping ? -1 : 0);
+#else
+
+    musfile_len = Sys_FileOpenRead(path, &musfile);
+    musfile_pos = 0;
+
+    rb->mp3_play_data(NULL, 0, get_mp3);
+#endif
+}
+
+
+void CDAudio_Stop(void)
+{
+    if ( (Mix_PlayingMusic()) || (Mix_PausedMusic()) )
+        Mix_HaltMusic();
+}
+
+
+void CDAudio_Pause(void)
+{
+    Mix_PauseMusic();
+}
+
+
+void CDAudio_Resume(void)
+{
+    Mix_ResumeMusic();
+}
+
+
+void CDAudio_Update(void)
+{
+    //Mix_VolumeMusic(bgmvolume.value * SDL_MIX_MAXVOLUME);
+}
+
+
+int CDAudio_Init(void)
+{
+    rb->splashf(HZ, "CD Init");
+
+    if(Mix_OpenAudio(MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT, 2, 1024)==-1) {
+        rb->splashf(HZ, "Mix_OpenAudio: %s\n", Mix_GetError());
+        return -1;
+    }
+    return 0;
+}
+
+
+void CDAudio_Shutdown(void)
+{
+    if(mus)
+        Mix_FreeMusic(mus);
+    CDAudio_Stop();
+}

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->samplebits = (desired.format & 0xFF);
-	shm->speed = obtained.freq;
+	shm->speed = desired.freq;
-	shm->channels = obtained.channels;
+	shm->channels = desired.channels;
-	shm->samples = obtained.samples*shm->channels;
+	shm->samples = desired.samples*shm->channels;
 	shm->samplepos = 0;
 	shm->submission_chunk = 1;
 	shm->buffer = NULL;