--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/libsdl-trunk/src/audio/dmedia/SDL_irixaudio.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,242 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2006 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"
+
+/* Allow access to a raw mixing buffer (For IRIX 6.5 and higher) */
+/* patch for IRIX 5 by Georg Schwarz 18/07/2004 */
+
+#include "SDL_timer.h"
+#include "SDL_audio.h"
+#include "../SDL_audiomem.h"
+#include "../SDL_audio_c.h"
+#include "SDL_irixaudio.h"
+
+
+#ifndef AL_RESOURCE /* as a test whether we use the old IRIX audio libraries */
+#define OLD_IRIX_AUDIO
+#define alClosePort(x) ALcloseport(x)
+#define alFreeConfig(x) ALfreeconfig(x)
+#define alGetFillable(x) ALgetfillable(x)
+#define alNewConfig() ALnewconfig()
+#define alOpenPort(x,y,z) ALopenport(x,y,z)
+#define alSetChannels(x,y) ALsetchannels(x,y)
+#define alSetQueueSize(x,y) ALsetqueuesize(x,y)
+#define alSetSampFmt(x,y) ALsetsampfmt(x,y)
+#define alSetWidth(x,y) ALsetwidth(x,y)
+#endif
+
+/* Audio driver functions */
+static int AL_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static void AL_WaitAudio(_THIS);
+static void AL_PlayAudio(_THIS);
+static Uint8 *AL_GetAudioBuf(_THIS);
+static void AL_CloseAudio(_THIS);
+
+/* Audio driver bootstrap functions */
+
+static int Audio_Available(void)
+{
+ return 1;
+}
+
+static void Audio_DeleteDevice(SDL_AudioDevice *device)
+{
+ SDL_free(device->hidden);
+ SDL_free(device);
+}
+
+static SDL_AudioDevice *Audio_CreateDevice(int devindex)
+{
+ SDL_AudioDevice *this;
+
+ /* 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));
+
+ /* Set the function pointers */
+ this->OpenAudio = AL_OpenAudio;
+ this->WaitAudio = AL_WaitAudio;
+ this->PlayAudio = AL_PlayAudio;
+ this->GetAudioBuf = AL_GetAudioBuf;
+ this->CloseAudio = AL_CloseAudio;
+
+ this->free = Audio_DeleteDevice;
+
+ return this;
+}
+
+AudioBootStrap DMEDIA_bootstrap = {
+ "AL", "IRIX DMedia audio",
+ Audio_Available, Audio_CreateDevice
+};
+
+
+void static AL_WaitAudio(_THIS)
+{
+ Sint32 timeleft;
+
+ timeleft = this->spec.samples - alGetFillable(audio_port);
+ if ( timeleft > 0 ) {
+ timeleft /= (this->spec.freq/1000);
+ SDL_Delay((Uint32)timeleft);
+ }
+}
+
+static void AL_PlayAudio(_THIS)
+{
+ /* Write the audio data out */
+ if ( alWriteFrames(audio_port, mixbuf, this->spec.samples) < 0 ) {
+ /* Assume fatal error, for now */
+ this->enabled = 0;
+ }
+}
+
+static Uint8 *AL_GetAudioBuf(_THIS)
+{
+ return(mixbuf);
+}
+
+static void AL_CloseAudio(_THIS)
+{
+ if ( mixbuf != NULL ) {
+ SDL_FreeAudioMem(mixbuf);
+ mixbuf = NULL;
+ }
+ if ( audio_port != NULL ) {
+ alClosePort(audio_port);
+ audio_port = NULL;
+ }
+}
+
+static int AL_OpenAudio(_THIS, SDL_AudioSpec * spec)
+{
+ Uint16 test_format = SDL_FirstAudioFormat(spec->format);
+ long width = 0;
+ long fmt = 0;
+ int valid = 0;
+
+#ifdef OLD_IRIX_AUDIO
+ {
+ long audio_param[2];
+ audio_param[0] = AL_OUTPUT_RATE;
+ audio_param[1] = spec->freq;
+ valid = (ALsetparams(AL_DEFAULT_DEVICE, audio_param, 2) < 0);
+ }
+#else
+ {
+ ALpv audio_param;
+ audio_param.param = AL_RATE;
+ audio_param.value.i = spec->freq;
+ valid = (alSetParams(AL_DEFAULT_OUTPUT, &audio_param, 1) < 0);
+ }
+#endif
+
+ while ((!valid) && (test_format)) {
+ valid = 1;
+ spec->format = test_format;
+
+ switch (test_format) {
+ case AUDIO_S8:
+ width = AL_SAMPLE_8;
+ fmt = AL_SAMPFMT_TWOSCOMP;
+ break;
+
+ case AUDIO_S16SYS:
+ width = AL_SAMPLE_16;
+ fmt = AL_SAMPFMT_TWOSCOMP;
+ break;
+
+ default:
+ valid = 0;
+ test_format = SDL_NextAudioFormat();
+ break;
+ }
+
+ if (valid) {
+ ALconfig audio_config = alNewConfig();
+ valid = 0;
+ if (audio_config) {
+ if (alSetChannels(audio_config, spec->channels) < 0) {
+ if (spec->channels > 2) { /* can't handle > stereo? */
+ spec->channels = 2; /* try again below. */
+ }
+ }
+
+ if ((alSetSampFmt(audio_config, fmt) >= 0) &&
+ ((!width) || (alSetWidth(audio_config, width) >= 0)) &&
+ (alSetQueueSize(audio_config, spec->samples * 2) >= 0) &&
+ (alSetChannels(audio_config, spec->channels) >= 0)) {
+
+ audio_port = alOpenPort("SDL audio", "w", audio_config);
+ if (audio_port == NULL) {
+ /* docs say AL_BAD_CHANNELS happens here, too. */
+ int err = oserror();
+ if (err == AL_BAD_CHANNELS) {
+ spec->channels = 2;
+ alSetChannels(audio_config, spec->channels);
+ audio_port = alOpenPort("SDL audio", "w",
+ audio_config);
+ }
+ }
+
+ if (audio_port != NULL) {
+ valid = 1;
+ }
+ }
+
+ alFreeConfig(audio_config);
+ }
+ }
+ }
+
+ if (!valid) {
+ SDL_SetError("Unsupported audio format");
+ return (-1);
+ }
+
+ /* Update the fragment size as size in bytes */
+ SDL_CalculateAudioSpec(spec);
+
+ /* Allocate mixing buffer */
+ mixbuf = (Uint8 *) SDL_AllocAudioMem(spec->size);
+ if (mixbuf == NULL) {
+ SDL_OutOfMemory();
+ return (-1);
+ }
+ SDL_memset(mixbuf, spec->silence, spec->size);
+
+ /* We're ready to rock and roll. :-) */
+ return (0);
+}
+