From 0e419987e48b006104748118fa28161484b7dfa1 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 9 Jan 2006 11:22:36 +0000
Subject: SDL simulator brought by Nathan Hand and Nick Lanham. This is added
 as a third simulator with the hope that once it works fine, we can remove the
 other two and only have one unified simulator.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8312 a1c6a512-1295-4272-9138-f99709370657
---
 uisimulator/sdl/sound.c | 119 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 uisimulator/sdl/sound.c

(limited to 'uisimulator/sdl/sound.c')

diff --git a/uisimulator/sdl/sound.c b/uisimulator/sdl/sound.c
new file mode 100644
index 0000000000..6068fb3863
--- /dev/null
+++ b/uisimulator/sdl/sound.c
@@ -0,0 +1,119 @@
+/***************************************************************************
+ *             __________               __   ___.                  
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___  
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /  
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <   
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \  
+ *                     \/            \/     \/    \/            \/ 
+ * $Id$
+ *
+ * Copyright (C) 2005 by Nick Lanham
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "autoconf.h"
+
+#ifdef ROCKBOX_HAS_SIMSOUND /* play sound in sim enabled */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <SDL.h>
+
+#include "sound.h"
+
+//static Uint8 *audio_chunk;
+static int audio_len;
+static char *audio_pos;
+SDL_sem* sem;
+
+/* The audio function callback takes the following parameters:
+   stream:  A pointer to the audio buffer to be filled
+   len:     The length (in bytes) of the audio buffer
+*/
+void mixaudio(void *udata, Uint8 *stream, int len)
+{
+  (void)udata;
+
+  /* Only play if we have data left */
+  if ( audio_len == 0 )
+    return;
+
+  len = (len > audio_len) ? audio_len : len;
+  memcpy(stream, audio_pos, len);
+  audio_pos += len;
+  audio_len -= len;
+
+  if(audio_len == 0) {
+    if(SDL_SemPost(sem)) 
+      fprintf(stderr,"Couldn't post: %s",SDL_GetError());
+      
+  }
+}
+
+
+
+int sim_sound_init(void)
+{
+  SDL_AudioSpec fmt;
+
+  /* Set 16-bit stereo audio at 44Khz */
+  fmt.freq = 44100;
+  fmt.format = AUDIO_S16SYS;
+  fmt.channels = 2;
+  fmt.samples = 512;        /* A good value for games */
+  fmt.callback = mixaudio;
+  fmt.userdata = NULL;
+
+  sem = SDL_CreateSemaphore(0);
+
+  /* Open the audio device and start playing sound! */
+  if(SDL_OpenAudio(&fmt, NULL) < 0) {
+    fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError());
+    return -1;
+  }
+  SDL_PauseAudio(0);
+  return 0;
+
+  //...
+    
+  //SDL_CloseAudio();
+}
+
+void sound_playback_thread(void)
+{
+  int sndret = sim_sound_init();
+  unsigned char *buf;
+  long size;
+
+  while(sndret)
+    sleep(100000); /* wait forever, can't play sound! */
+    
+  do {
+    while(!sound_get_pcm)
+      /* TODO: fix a fine thread-synch mechanism here */
+      usleep(10000);
+    do {
+      sound_get_pcm(&buf, &size);
+      if(!size) {
+	sound_get_pcm = NULL;
+	break;
+      }
+      audio_pos = buf; // TODO: is this safe?
+      audio_len = size;
+      //printf("len: %i\n",audio_len);
+      if(SDL_SemWait(sem)) 
+	fprintf(stderr,"Couldn't wait: %s",SDL_GetError());
+    } while(size);
+  } while(1);
+}
+
+#endif /* ROCKBOX_HAS_SIMSOUND */
-- 
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