Import SDL release-1.2.15

Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf

2 files changed, 227 insertions, 0 deletions

diff --git a/distrib/sdl-1.2.15/src/audio/disk/SDL_diskaudio.c b/distrib/sdl-1.2.15/src/audio/disk/SDL_diskaudio.c
new file mode 100644
index 0000000..47c1009
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/audio/disk/SDL_diskaudio.c
@@ -0,0 +1,186 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+
+    This file written by Ryan C. Gordon (icculus@icculus.org)
+*/
+#include "SDL_config.h"
+
+/* Output raw audio data to a file. */
+
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+
+#include "SDL_rwops.h"
+#include "SDL_timer.h"
+#include "SDL_audio.h"
+#include "../SDL_audiomem.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_audiodev_c.h"
+#include "SDL_diskaudio.h"
+
+/* The tag name used by DISK audio */
+#define DISKAUD_DRIVER_NAME         "disk"
+
+/* environment variables and defaults. */
+#define DISKENVR_OUTFILE         "SDL_DISKAUDIOFILE"
+#define DISKDEFAULT_OUTFILE      "sdlaudio.raw"
+#define DISKENVR_WRITEDELAY      "SDL_DISKAUDIODELAY"
+#define DISKDEFAULT_WRITEDELAY   150
+
+/* Audio driver functions */
+static int DISKAUD_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static void DISKAUD_WaitAudio(_THIS);
+static void DISKAUD_PlayAudio(_THIS);
+static Uint8 *DISKAUD_GetAudioBuf(_THIS);
+static void DISKAUD_CloseAudio(_THIS);
+
+static const char *DISKAUD_GetOutputFilename(void)
+{
+	const char *envr = SDL_getenv(DISKENVR_OUTFILE);
+	return((envr != NULL) ? envr : DISKDEFAULT_OUTFILE);
+}
+
+/* Audio driver bootstrap functions */
+static int DISKAUD_Available(void)
+{
+	const char *envr = SDL_getenv("SDL_AUDIODRIVER");
+	if (envr && (SDL_strcmp(envr, DISKAUD_DRIVER_NAME) == 0)) {
+		return(1);
+	}
+	return(0);
+}
+
+static void DISKAUD_DeleteDevice(SDL_AudioDevice *device)
+{
+	SDL_free(device->hidden);
+	SDL_free(device);
+}
+
+static SDL_AudioDevice *DISKAUD_CreateDevice(int devindex)
+{
+	SDL_AudioDevice *this;
+	const char *envr;
+
+	/* Initialize all variables that we clean on shutdown */
+	this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
+	if ( this ) {
+		SDL_memset(this, 0, (sizeof *this));
+		this->hidden = (struct SDL_PrivateAudioData *)
+				SDL_malloc((sizeof *this->hidden));
+	}
+	if ( (this == NULL) || (this->hidden == NULL) ) {
+		SDL_OutOfMemory();
+		if ( this ) {
+			SDL_free(this);
+		}
+		return(0);
+	}
+	SDL_memset(this->hidden, 0, (sizeof *this->hidden));
+
+	envr = SDL_getenv(DISKENVR_WRITEDELAY);
+	this->hidden->write_delay = (envr) ? SDL_atoi(envr) : DISKDEFAULT_WRITEDELAY;
+
+	/* Set the function pointers */
+	this->OpenAudio = DISKAUD_OpenAudio;
+	this->WaitAudio = DISKAUD_WaitAudio;
+	this->PlayAudio = DISKAUD_PlayAudio;
+	this->GetAudioBuf = DISKAUD_GetAudioBuf;
+	this->CloseAudio = DISKAUD_CloseAudio;
+
+	this->free = DISKAUD_DeleteDevice;
+
+	return this;
+}
+
+AudioBootStrap DISKAUD_bootstrap = {
+	DISKAUD_DRIVER_NAME, "direct-to-disk audio",
+	DISKAUD_Available, DISKAUD_CreateDevice
+};
+
+/* This function waits until it is possible to write a full sound buffer */
+static void DISKAUD_WaitAudio(_THIS)
+{
+	SDL_Delay(this->hidden->write_delay);
+}
+
+static void DISKAUD_PlayAudio(_THIS)
+{
+	int written;
+
+	/* Write the audio data */
+	written = SDL_RWwrite(this->hidden->output,
+                        this->hidden->mixbuf, 1,
+                        this->hidden->mixlen);
+
+	/* If we couldn't write, assume fatal error for now */
+	if ( (Uint32)written != this->hidden->mixlen ) {
+		this->enabled = 0;
+	}
+#ifdef DEBUG_AUDIO
+	fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+#endif
+}
+
+static Uint8 *DISKAUD_GetAudioBuf(_THIS)
+{
+	return(this->hidden->mixbuf);
+}
+
+static void DISKAUD_CloseAudio(_THIS)
+{
+	if ( this->hidden->mixbuf != NULL ) {
+		SDL_FreeAudioMem(this->hidden->mixbuf);
+		this->hidden->mixbuf = NULL;
+	}
+	if ( this->hidden->output != NULL ) {
+		SDL_RWclose(this->hidden->output);
+		this->hidden->output = NULL;
+	}
+}
+
+static int DISKAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
+{
+	const char *fname = DISKAUD_GetOutputFilename();
+
+	/* Open the audio device */
+	this->hidden->output = SDL_RWFromFile(fname, "wb");
+	if ( this->hidden->output == NULL ) {
+		return(-1);
+	}
+
+#if HAVE_STDIO_H
+	fprintf(stderr, "WARNING: You are using the SDL disk writer"
+                    " audio driver!\n Writing to file [%s].\n", fname);
+#endif
+
+	/* Allocate mixing buffer */
+	this->hidden->mixlen = spec->size;
+	this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
+	if ( this->hidden->mixbuf == NULL ) {
+		return(-1);
+	}
+	SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
+
+	/* We're ready to rock and roll. :-) */
+	return(0);
+}
+
diff --git a/distrib/sdl-1.2.15/src/audio/disk/SDL_diskaudio.h b/distrib/sdl-1.2.15/src/audio/disk/SDL_diskaudio.h
new file mode 100644
index 0000000..24d7c9e
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/audio/disk/SDL_diskaudio.h
@@ -0,0 +1,41 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_diskaudio_h
+#define _SDL_diskaudio_h
+
+#include "SDL_rwops.h"
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the video functions */
+#define _THIS	SDL_AudioDevice *this
+
+struct SDL_PrivateAudioData {
+	/* The file descriptor for the audio device */
+	SDL_RWops *output;
+	Uint8 *mixbuf;
+	Uint32 mixlen;
+	Uint32 write_delay;
+};
+
+#endif /* _SDL_diskaudio_h */