Added ac3dec 0.6.1 with native ALSA driver.

2025-11-02 09:01:48 -05:00 · 2001-04-17 19:31:03 +00:00 · 2001-04-17 19:31:03 +00:00 · 28ff64db0a
commit 28ff64db0a
parent f2d80b5b5d
50 changed files with 6094 additions and 0 deletions
--- a/ac3dec/output_irix.c
+++ b/ac3dec/output_irix.c
@ -0,0 +1,154 @@
+/*
+ *
+ *  output_irix.c
+ *    
+ *      Copyright (C) Aaron Holtzman - May 1999
+ *      Port to IRIX by Jim Miller, SGI - Nov 1999
+ *
+ *  This file is part of ac3dec, a free Dolby AC-3 stream decoder.
+ *      
+ *  ac3dec is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *   
+ *  ac3dec 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 General Public License for more details.
+ *   
+ *  You should have received a copy of the GNU General Public License
+ *  along with GNU Make; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
+ *
+ *
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <math.h>
+
+#include <audio.h>
+
+
+typedef signed short sint_16;
+typedef unsigned int uint_32;
+#include "output.h"
+
+static int init = 0;
+static ALport alport = 0;
+static ALconfig alconfig = 0;
+static int bytesPerWord = 1;
+static int nChannels = 2;
+
+
+/*
+ * open the audio device for writing to
+ */
+int output_open(int bits, int rate, int channels)
+{
+  ALpv params[2];
+  int  dev = AL_DEFAULT_OUTPUT;
+  int  wsize = AL_SAMPLE_16;
+
+  nChannels = channels;
+
+  if (!init) {
+    init = 1;
+    alconfig = alNewConfig();
+
+    if (alSetQueueSize(alconfig, BUFFER_SIZE) < 0) {
+        fprintf(stderr, "alSetQueueSize failed: %s\n",
+                alGetErrorString(oserror()));
+        return 0;
+    }
+
+    if (alSetChannels(alconfig, channels) < 0) {
+        fprintf(stderr, "alSetChannels(%d) failed: %s\n",
+                channels, alGetErrorString(oserror()));
+        return 0;
+    }
+
+    if (alSetDevice(alconfig, dev) < 0) {
+        fprintf(stderr, "alSetDevice failed: %s\n",
+                        alGetErrorString(oserror()));
+        return 0;
+    }
+
+    if (alSetSampFmt(alconfig, AL_SAMPFMT_TWOSCOMP) < 0) {
+        fprintf(stderr, "alSetSampFmt failed: %s\n",
+                        alGetErrorString(oserror()));
+        return 0;
+    }
+
+    alport = alOpenPort("AC3Decode", "w", 0);
+    if (!alport) {
+        fprintf(stderr, "alOpenPort failed: %s\n",
+                        alGetErrorString(oserror()));
+        return 0;
+    }
+
+    switch (bits) {
+        case 8:         
+                bytesPerWord = 1;
+                wsize = AL_SAMPLE_8;
+                break;
+        case 16: 
+                bytesPerWord = 2;
+                wsize = AL_SAMPLE_16;
+                break;
+        case 24:
+                bytesPerWord = 4;
+                wsize = AL_SAMPLE_24;
+                break;
+        default:
+                printf("Irix audio: unsupported bit with %d\n", bits);
+                break;
+    }
+
+    if (alSetWidth(alconfig, wsize) < 0) {
+        fprintf(stderr, "alSetWidth failed: %s\n", alGetErrorString(oserror()));
+        return 0;
+    }
+        
+    params[0].param = AL_RATE;
+    params[0].value.ll = alDoubleToFixed((double)rate);
+    params[1].param = AL_MASTER_CLOCK;
+    params[1].value.i = AL_CRYSTAL_MCLK_TYPE;
+    if ( alSetParams(dev, params, 1) < 0) {
+        printf("alSetParams() failed: %s\n", alGetErrorString(oserror()));
+        return 0;
+    }
+  }
+
+	printf("I've synced the IRIX code with the mainline blindly.\n Let me know if it works.\n");
+
+  return 1;
+}
+
+/*
+ * play the sample to the already opened file descriptor
+ */
+
+void output_play(sint_16* output_samples, uint_32 num_bytes)
+{
+	alWriteFrames(alport, output_samples, 6 * 256); 
+}
+
+void
+output_close(void)
+{
+  alClosePort(alport);
+  alFreeConfig(alconfig);
+  alport = 0;
+  alconfig = 0;
+  init = 0;
+}