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authorrubidium <rubidium@openttd.org>2008-11-25 21:09:00 +0000
committerrubidium <rubidium@openttd.org>2008-11-25 21:09:00 +0000
commit72124862f0cdf799da0773be8d8a0dd3da0a01bc (patch)
tree8f56ace83113a8c96887be195a473b1132beb9e5 /src
parent3aacd0a3d5efa9001c97dbaa761c7ad90df789be (diff)
downloadopenttd-72124862f0cdf799da0773be8d8a0dd3da0a01bc.tar.xz
(svn r14631) -Add: support for Allegro as sound backend.
Diffstat (limited to 'src')
-rw-r--r--src/openttd.cpp1
-rw-r--r--src/sound/allegro_s.cpp74
-rw-r--r--src/sound/allegro_s.h27
-rw-r--r--src/sound/sound_driver.hpp3
-rw-r--r--src/video/allegro_v.cpp11
5 files changed, 113 insertions, 3 deletions
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 54ae08f7b..ea56b0c58 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1184,6 +1184,7 @@ void GameLoop()
InputLoop();
+ _sound_driver->MainLoop();
MusicLoop();
}
diff --git a/src/sound/allegro_s.cpp b/src/sound/allegro_s.cpp
new file mode 100644
index 000000000..f3d9579a9
--- /dev/null
+++ b/src/sound/allegro_s.cpp
@@ -0,0 +1,74 @@
+/* $Id$ */
+
+/** @file allegro_s.cpp Playing sound via Allegro. */
+
+#ifdef WITH_ALLEGRO
+
+#include "../stdafx.h"
+
+#include "../driver.h"
+#include "../mixer.h"
+#include "../sdl.h"
+#include "allegro_s.h"
+#include <allegro.h>
+
+static FSoundDriver_Allegro iFSoundDriver_Allegro;
+/** The stream we are writing too */
+static AUDIOSTREAM *_stream = NULL;
+/** The number of samples in the buffer */
+static const int BUFFER_SIZE = 512;
+
+void SoundDriver_Allegro::MainLoop()
+{
+ /* We haven't opened a stream yet */
+ if (_stream == NULL) return;
+
+ void *data = get_audio_stream_buffer(_stream);
+ /* We don't have to fill the stream yet */
+ if (data == NULL) return;
+
+ /* Mix the samples */
+ MxMixSamples(data, BUFFER_SIZE);
+
+ /* Allegro sound is always unsigned, so we need to correct that */
+ uint16 *snd = (uint16*)data;
+ for (int i = 0; i < BUFFER_SIZE * 2; i++) snd[i] ^= 0x8000;
+
+ /* Tell we've filled the stream */
+ free_audio_stream_buffer(_stream);
+}
+
+/** There are multiple modules that might be using Allegro and
+ * Allegro can only be initiated once. */
+extern int _allegro_count;
+
+const char *SoundDriver_Allegro::Start(const char * const *parm)
+{
+ if (_allegro_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
+ _allegro_count++;
+
+ /* Initialise the sound */
+ if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL) != 0) return NULL;
+
+ /* Okay, there's no soundcard */
+ if (digi_card == DIGI_NONE) {
+ DEBUG(driver, 0, "allegro: no sound card found");
+ return NULL;
+ }
+
+ _stream = play_audio_stream(BUFFER_SIZE, 16, true, 11025, 255, 128);
+ return NULL;
+}
+
+void SoundDriver_Allegro::Stop()
+{
+ if (_stream != NULL) {
+ stop_audio_stream(_stream);
+ _stream = NULL;
+ }
+ remove_sound();
+
+ if (--_allegro_count == 0) allegro_exit();
+}
+
+#endif /* WITH_ALLEGRO */
diff --git a/src/sound/allegro_s.h b/src/sound/allegro_s.h
new file mode 100644
index 000000000..181f45059
--- /dev/null
+++ b/src/sound/allegro_s.h
@@ -0,0 +1,27 @@
+/* $Id$ */
+
+/** @file allegro_s.h Base fo playing sound via Allegro. */
+
+#ifndef SOUND_ALLEGRO_H
+#define SOUND_ALLEGRO_H
+
+#include "sound_driver.hpp"
+
+class SoundDriver_Allegro: public SoundDriver {
+public:
+ /* virtual */ const char *Start(const char * const *param);
+
+ /* virtual */ void Stop();
+
+ /* virtual */ void MainLoop();
+};
+
+class FSoundDriver_Allegro: public SoundDriverFactory<FSoundDriver_Allegro> {
+public:
+ static const int priority = 5;
+ /* virtual */ const char *GetName() { return "allegro"; }
+ /* virtual */ const char *GetDescription() { return "Allegro Sound Driver"; }
+ /* virtual */ Driver *CreateInstance() { return new SoundDriver_Allegro(); }
+};
+
+#endif /* SOUND_ALLEGRO_H */
diff --git a/src/sound/sound_driver.hpp b/src/sound/sound_driver.hpp
index 8f3f08579..5756db309 100644
--- a/src/sound/sound_driver.hpp
+++ b/src/sound/sound_driver.hpp
@@ -8,6 +8,9 @@
#include "../driver.h"
class SoundDriver: public Driver {
+public:
+ /* Called once every tick */
+ virtual void MainLoop() {}
};
class SoundDriverFactoryBase: public DriverFactoryBase {
diff --git a/src/video/allegro_v.cpp b/src/video/allegro_v.cpp
index a70a2709c..f69c7121e 100644
--- a/src/video/allegro_v.cpp
+++ b/src/video/allegro_v.cpp
@@ -374,9 +374,14 @@ static void PollEvent()
}
}
+/** There are multiple modules that might be using Allegro and
+ * Allegro can only be initiated once. */
+int _allegro_count = 0;
+
const char *VideoDriver_Allegro::Start(const char * const *parm)
{
- if (install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
+ if (_allegro_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
+ _allegro_count++;
install_timer();
install_mouse();
@@ -391,7 +396,7 @@ const char *VideoDriver_Allegro::Start(const char * const *parm)
void VideoDriver_Allegro::Stop()
{
- allegro_exit();
+ if (--_allegro_count == 0) allegro_exit();
}
#if defined(UNIX) || defined(__OS2__) || defined(PSP)
@@ -431,7 +436,7 @@ void VideoDriver_Allegro::MainLoop()
#else
/* Speedup when pressing tab, except when using ALT+TAB
* to switch to another application */
- if (keys[KEY_TAB] && (key_shifts & KB_ALT_FLAG) == 0)
+ if (key[KEY_TAB] && (key_shifts & KB_ALT_FLAG) == 0)
#endif
{
if (!_networking && _game_mode != GM_MENU) _fast_forward |= 2;