--- SIDPlayer/src/main_sdl.cpp	2001/01/21 18:04:46	1.6
+++ SIDPlayer/src/main_sdl.cpp	2001/05/22 20:01:34	1.10
@@ -21,8 +21,11 @@
 #include "sys.h"
 
 #include <SDL.h>
+#include <SDL/SDL_endian.h>
+
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #include "main.h"
 #include "prefs.h"
@@ -35,7 +38,7 @@
 
 static void usage(const char *prg_name)
 {
-	printf("Usage: %s [OPTION...] FILE [song_number]]\n", prg_name);
+	printf("Usage: %s [OPTION...] FILE [song_number]\n", prg_name);
 	PrefsPrintUsage();
 	exit(0);
 }
@@ -66,25 +69,26 @@ int main(int argc, char **argv)
 	}
 	atexit(quit);
 	InitAll(argc, argv);
-	int32 selected_speed = PrefsFindInt32("speed");
+	int32 speed = PrefsFindInt32("speed");
 
 	// Parse non-option arguments
-	if (argc < 2)
-		usage(argv[0]);
-	char *file_name = argv[argc - 1];
+	const char *file_name = NULL;
 	int song = 0;
-	if (argc >= 3) {
-		bool only_numbers = true;
-		for (int i=0; i<strlen(file_name); i++)
-			if (!isdigit(file_name[i])) {
-				only_numbers = false;
-				break;
-			}
-		if (only_numbers) {
-			song = atoi(file_name);
-			file_name = argv[argc - 2];
+	for (int i=1; i<argc; i++) {
+		if (strcmp(argv[i], "--help") == 0)
+			usage(argv[0]);
+		else if (argv[i][0] == '-') {
+			fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
+			usage(argv[0]);
+		} else {
+			if (file_name == NULL)
+				file_name = argv[i];  // First non-option argument is file name
+			else
+				song = atoi(argv[i]); // Second non-option argument is song number
 		}
 	}
+	if (file_name == NULL)
+		usage(argv[0]);
 
 	// Load given PSID file
 	if (!LoadPSIDFile(file_name)) {
@@ -99,20 +103,81 @@ int main(int argc, char **argv)
 		SelectSong(song - 1);
 	}
 
+	SIDAdjustSpeed(speed); // SelectSong and LoadPSIDFile() reset this to 100%
+
 	// Print file information
 	printf("Module Name: %s\n", module_name);
 	printf("Author     : %s\n", author_name);
 	printf("Copyright  : %s\n\n", copyright_info);
 	printf("Playing song %d/%d\n", current_song + 1, number_of_songs);
 
-	// Start replay and enter main loop
-	SIDAdjustSpeed(selected_speed);	// SelectSong resets this to 100%
-	SDL_PauseAudio(false);
-	while (true) {
-		SDL_Event e;
-		if (SDL_WaitEvent(&e)) {
-			if (e.type == SDL_QUIT)
-				break;
+	// Replay or output to file?
+	const char *outfile = PrefsFindString("outfile");
+	if (outfile) {
+
+		// Open file
+		SDL_RWops *f = SDL_RWFromFile(outfile, "wb");
+		if (f == NULL) {
+			fprintf(stderr, "Can't open '%s' for writing (%s)\n", outfile, strerror(errno));
+			exit(1);
+		}
+
+		// Get format information
+		int32 channels = (PrefsFindBool("stereo") ? 2 : 1);
+		int32 bits = (PrefsFindBool("audio16bit") ? 16 : 8);
+		int32 rate = PrefsFindInt32("samplerate");
+		int32 time = PrefsFindInt32("time");
+		int32 bytes_per_frame = channels * (bits / 8);
+		int32 bytes_per_second = rate * bytes_per_frame;
+		int32 data_length = time * bytes_per_second;
+
+		// Write header
+		SDL_WriteLE32(f, 0x46464952); // "RIFF"
+		SDL_WriteLE32(f, 36 + data_length);
+		SDL_WriteLE32(f, 0x45564157); // "WAVE"
+		SDL_WriteLE32(f, 0x20746D66); // "fmt "
+		SDL_WriteLE32(f, 16);
+		SDL_WriteLE16(f, 1);
+		SDL_WriteLE16(f, channels);
+		SDL_WriteLE32(f, rate);
+		SDL_WriteLE32(f, bytes_per_second);
+		SDL_WriteLE16(f, bytes_per_frame);
+		SDL_WriteLE16(f, bits);
+		SDL_WriteLE32(f, 0x61746164); // "data"
+		SDL_WriteLE32(f, data_length);
+
+		// Calculate sound and write to file
+		uint8 *buf = new uint8[bytes_per_second];
+		for (int i=0; i<time; i++) {
+			SIDCalcBuffer(buf, bytes_per_second);
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+			if (bits > 8) {
+				// WAV file is little-endian, swap audio data
+				for (int b=0; b<bytes_per_second; b+=2) {
+					uint8 tmp = buf[b];
+					buf[b] = buf[b+1];
+					buf[b+1] = tmp;
+				}
+			}
+#endif
+			SDL_RWwrite(f, buf, bytes_per_second, 1);
+		}
+		delete[] buf;
+
+		// Close file
+		SDL_RWclose(f);
+		printf("Output written to '%s'\n", outfile);
+
+	} else {
+
+		// Start replay and enter main loop
+		SDL_PauseAudio(false);
+		while (true) {
+			SDL_Event e;
+			if (SDL_WaitEvent(&e)) {
+				if (e.type == SDL_QUIT)
+					break;
+			}
 		}
 	}