1 files changed, 157 insertions, 0 deletions
diff --git a/mpeglib/lib/util/audio/audioIO_IRIX.cpp b/mpeglib/lib/util/audio/audioIO_IRIX.cpp
new file mode 100644
index 00000000..8498a487
--- /dev/null
+++ b/mpeglib/lib/util/audio/audioIO_IRIX.cpp
@@ -0,0 +1,157 @@
+/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
+
+	Origional code by: Karl Anders Oygard
+	Modified by:
+	* Andrew Richards - moved code from audio.c
+
+ */
+#include <assert.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <dmedia/audio.h>
+#include "audioIO.h"
+
+/* declare these static to effectively isolate the audio device */
+
+static ALport audioport;
+static ALconfig audioconfig;
+
+
+/* audioOpen() */
+/* should open the audio device, perform any special initialization		 */
+/* Set the frequency, no of channels and volume. Volume is only set if */
+/* it is not -1 */
+
+
+void audioOpen() {
+  printf("sorry. The audio part for irix must be fixed. \n");
+}
+
+void
+audioInit(int sampleSize,int frequency, int stereo)
+{
+	ALconfig audioconfig;
+	audioconfig = ALnewconfig();
+ 
+	if (!audioconfig)
+		die("out of memory\n");
+	else {
+		long pvbuf[] = { AL_OUTPUT_COUNT, 0, AL_MONITOR_CTL, 0, AL_OUTPUT_RATE, 0};
+		
+		if (ALgetparams(AL_DEFAULT_DEVICE, pvbuf, 6) < 0)
+			if (oserror() == AL_BAD_DEVICE_ACCESS)
+				die("couldn't access audio device\n");
+		
+		if (pvbuf[1] == 0 && pvbuf[3] == AL_MONITOR_OFF) {
+			long al_params[] = { AL_OUTPUT_RATE, 0};
+			
+			al_params[1] = frequency;
+			ALsetparams(AL_DEFAULT_DEVICE, al_params, 2);
+		} else
+			if (pvbuf[5] != frequency)
+				die("audio device is already in use with wrong sample output rate\n");
+		
+		/* ALsetsampfmt(audioconfig, AL_SAMPFMT_TWOSCOMP); this is the default */
+		/* ALsetwidth(audioconfig, AL_SAMPLE_16); this is the default */
+		
+		if (!stereo) ALsetchannels(audioconfig, AL_MONO);
+		/* else ALsetchannels(audioconfig, AL_STEREO); this is the default */
+
+		ALsetqueuesize(audioconfig, AUSIZ * 2);
+		
+		audioport = ALopenport("amp", "w", audioconfig);
+		if (audioport == (ALport) 0) {
+			switch (oserror()) {
+			case AL_BAD_NO_PORTS:
+				die("system is out of ports\n");
+				
+			case AL_BAD_DEVICE_ACCESS:
+				die("couldn't access audio device\n");
+				
+			case AL_BAD_OUT_OF_MEM:
+				die("out of memory\n");
+			}			 
+			exit(-1);
+		}
+		ALsetfillpoint(audioport, AUSIZ);
+	}
+}
+
+
+/* audioSetVolume - only code this if your system can change the volume while */
+/*									playing. sets the output volume 0-100 */
+
+void
+audioSetVolume(int volume)
+{
+	long al_params[] = { AL_LEFT_SPEAKER_GAIN, 0, AL_RIGHT_SPEAKER_GAIN, 0};
+
+	al_params[1] = al_params[3] = volume * 100 / 255;
+
+	ALsetparams(AL_DEFAULT_DEVICE, al_params, 4);
+}
+
+
+/* audioFlush() */
+/* should flush the audio device */
+
+void
+audioFlush()
+{
+	DB(audio, msg("audio: flush %d\n",audio_fd) );
+}
+
+
+/* audioClose() */
+/* should close the audio device and perform any special shutdown			 */
+
+void
+audioClose()
+{
+int write_fd;
+
+	/* wait for all samples to be played */
+
+	write_fd = ALgetfd(audioport);
+	if (write_fd >= 0) {
+		fd_set write_fds;
+
+		FD_ZERO(&write_fds);
+		FD_SET(write_fd, &write_fds);
+
+		ALsetfillpoint(audioport, AUSIZ * 2);
+		select(write_fd + 1, NULL, &write_fds, NULL, NULL);
+	}
+
+	/* now close it */
+
+	ALcloseport(audioport);
+	DB(audio, msg("audio: closed %d\n",audio_fd) );
+}
+
+
+/* audioWrite */
+/* writes count bytes from buffer to the audio device */
+/* returns the number of bytes actually written */
+
+int audioWrite(char *buffer, int count)
+{
+	if (ALwritesamps(audioport, buffer, count / 2) == 0) {
+		ALsetfillpoint(audioport, AUSIZ);
+		return(count);
+	} else
+		return 0;
+}
+
+/* Let buffer.c have the audio descriptor so it can select on it. This
+   means that the program is dependent on an file descriptor to
+   work. Should really move the select's etc (with inlines of course) in
+   here so that this is the ONLY file which has hardware dependent audio
+   stuff in it. */
+
+int
+getAudioFd()
+{
+	return ALgetfd(audioport);
+}
+