Added ac3dec 0.6.1 with native ALSA driver.

ac3dec/ac3dec.c

@@ -0,0 +1,99 @@
+/* 
+ *   ac3dec.c
+ *
+ *	Copyright (C) Aaron Holtzman - May 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. 
+ *
+ *
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/errno.h>
+#include <errno.h>
+
+#include "libac3/ac3.h"
+#include "output.h"
+
+#define CHUNK_SIZE 2047
+uint_8 buf[CHUNK_SIZE];
+FILE *in_file;
+ 
+void fill_buffer(uint_8 **start,uint_8 **end)
+{
+	uint_32 bytes_read;
+
+	*start = buf;
+
+	bytes_read = fread(*start,1,CHUNK_SIZE,in_file);
+
+	//FIXME hack...
+	if(bytes_read < CHUNK_SIZE)
+		exit(0);
+
+	*end= *start + bytes_read;
+}
+
+int main(int argc,char *argv[])
+{
+	ac3_frame_t *ac3_frame;
+	ac3_config_t ac3_config;
+	int idx, channels = 2;
+
+
+	/* If we get an argument then use it as a filename... otherwise use
+	 * stdin */
+	idx = 1;
+	if (idx < argc && !strcmp(argv[idx], "-4")) {
+		channels = 4; idx++;
+	} else if (idx < argc && !strcmp(argv[idx], "-6")) {
+		channels = 6; idx++;
+	}
+	if (idx < argc && argv[idx] != NULL) {	
+		in_file = fopen(argv[idx],"r");	
+		if(!in_file)
+		{
+			fprintf(stderr,"%s - Couldn't open file %s\n",strerror(errno),argv[1]);
+			exit(1);
+		}
+	}
+	else
+		in_file = stdin;
+
+	ac3_config.fill_buffer_callback = fill_buffer;
+	ac3_config.num_output_ch = channels;
+	ac3_config.flags = 0;
+
+	ac3_init(&ac3_config);
+	
+	ac3_frame = ac3_decode_frame();
+	output_open(16,ac3_frame->sampling_rate,channels);
+
+	do
+	{
+		//Send the samples to the output device 
+		output_play(ac3_frame->audio_data, 256 * 6);
+	}
+	while((ac3_frame = ac3_decode_frame()));
+
+	output_close();
+	fclose(in_file);
+	return 0;
+}