Backlight support for 8-bit targets in SDL sim. Redo sound handling. Still doesn't work right, but is closer to how the actual Rockbox system does it. Move some stub functions in to Win32 and X11 sims to keep them compiling.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8686 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 149 insertions, 67 deletions

diff --git a/uisimulator/sdl/sound.c b/uisimulator/sdl/sound.c
index 66df6961b2..4b8427ca90 100644
--- a/uisimulator/sdl/sound.c
+++ b/uisimulator/sdl/sound.c
@@ -21,88 +21,170 @@
 
 #ifdef ROCKBOX_HAS_SIMSOUND /* play sound in sim enabled */
 
-#include <memory.h>
 #include <stdlib.h>
-#include "uisdl.h"
+#include <stdbool.h>
+#include <memory.h>
 #include "sound.h"
+#include "SDL.h"
+
+static bool pcm_playing;
+static bool pcm_paused;
 
-static int audio_len;
-static char *audio_pos;
-SDL_sem* sem;
+static Uint8* pcm_data;
+static int pcm_data_size;
 
-void mixaudio(void *udata, Uint8 *stream, int len)
+static void sdl_dma_start(const void *addr, size_t size)
 {
-  (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());
-      
-  }
+    pcm_playing = true;
+
+    pcm_data = (Uint8 *) addr;
+    pcm_data_size = size;
+
+    SDL_PauseAudio(0);
 }
 
-int sim_sound_init(void)
+static void sdl_dma_stop() 
 {
-  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;
+    pcm_playing = false;
+
+    SDL_PauseAudio(1);
+
+    pcm_paused = false;
 }
 
-int sound_playback_thread(void *p)
+static void (*callback_for_more)(unsigned char**, size_t*) = NULL;
+void pcm_play_data(void (*get_more)(unsigned char** start, size_t* size),
+        unsigned char* start, size_t size)
 {
-  int sndret = sim_sound_init();
-  unsigned char *buf;
-  long size;
+    callback_for_more = get_more;
+
+    if (!(start && size)) {
+        if (get_more)
+            get_more(&start, &size);
+        else
+            return;
+    }
+
+    if (start && size) {
+        sdl_dma_start(start, size);
+    }
+}
 
-  (void)p;
+size_t pcm_get_bytes_waiting(void)
+{
+    return pcm_data_size;
+}
 
-  while(sndret)
-        SDL_Delay(100000); /* wait forever, can't play sound! */
+void pcm_mute(bool mute)
+{
+    (void) mute;
+}
+
+void pcm_play_stop(void)
+{
+    if (pcm_playing) {
+        sdl_dma_stop();
+    }
+}
+
+void pcm_play_pause(bool play)
+{
+    int next_size;
+    Uint8 *next_start;
+    
+    if (!pcm_playing) {
+        return;
+    }
+
+    if(pcm_paused && play) {
+        if (pcm_get_bytes_waiting()) {
+            printf("unpause\n");
+
+            SDL_PauseAudio(0);
+        } else {
+            printf("unpause, no data waiting\n");
+
+            void (*get_more)(unsigned char**, size_t*) = callback_for_more;
+
+            if (get_more) {
+                get_more(&next_start, &next_size);
+            }
+
+            if (next_start && next_size) {
+                sdl_dma_start(next_start, next_size);
+            } else {
+                sdl_dma_stop();
+                printf("unpause attempted, no data\n");
+            }
+        }
+    } else if(!pcm_paused && !play) {
+        printf("pause\n");
+
+        SDL_PauseAudio(1);
+    }
+    
+    pcm_paused = !play;
+}
+
+bool pcm_is_paused(void)
+{
+    return pcm_paused;
+}
+
+bool pcm_is_playing(void)
+{
+    return pcm_playing;
+}
+
+void sdl_audio_callback(void *udata, Uint8 *stream, int len)
+{
+    int datalen;
+    
+    (void) udata;
+
+    if (pcm_data_size == 0) {
+        return;
+    }
+
+    datalen = (len > pcm_data_size) ? pcm_data_size : len;
+
+    memcpy(stream, pcm_data, datalen);
+
+    pcm_data_size -= datalen;
+    pcm_data += datalen;
+
+    if (pcm_data_size == 0) {
+        void (*get_more)(unsigned char**, size_t*) = callback_for_more;
+        if (get_more) {
+            get_more(&pcm_data, &pcm_data_size);
+        } else {
+            pcm_data_size = 0;
+            pcm_data = NULL;
+        }
+    }
+}
+
+int pcm_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;
+    fmt.callback = sdl_audio_callback;
+    fmt.userdata = NULL;
+
+    /* 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;
+    }
     
-  do {
-    while(!sound_get_pcm)
-      /* TODO: fix a fine thread-synch mechanism here */
-          SDL_Delay(100);
-    do {
-      sound_get_pcm(&buf, &size);
-      if(!size) {
-        sound_get_pcm = NULL;
-        break;
-      }
-      audio_pos = buf; // TODO: is this safe?
-      audio_len = size;
-
-      if(SDL_SemWait(sem)) 
-        fprintf(stderr,"Couldn't wait: %s",SDL_GetError());
-    } while(size);
-  } while(1);
+    sdl_dma_stop();
 
+    return 0;
 }
 
 #endif /* ROCKBOX_HAS_SIMSOUND */