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/* |
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* main_sdl.cpp - SIDPlayer SDL main program |
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* |
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* SIDPlayer (C) Copyright 1996-2001 Christian Bauer |
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* SIDPlayer (C) Copyright 1996-2004 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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#include "sys.h" |
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#include <SDL.h> |
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#include <SDL/SDL_endian.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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|
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#ifdef __unix__ |
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#include <unistd.h> |
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#include <sys/time.h> |
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#endif |
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#include "main.h" |
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#include "prefs.h" |
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/* |
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* Get current value of microsecond timer |
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*/ |
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|
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uint64 GetTicks_usec() |
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{ |
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#ifdef __unix__ |
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struct timeval t; |
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gettimeofday(&t, NULL); |
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return uint64(t.tv_sec) * 1000000 + t.tv_usec; |
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#else |
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return uint64(SDL_GetTicks()) * 1000; |
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#endif |
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} |
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|
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|
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/* |
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* Delay by specified number of microseconds (<1 second) |
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* (adapted from SDL_Delay() source) |
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*/ |
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|
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void Delay_usec(uint32 usec) |
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{ |
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#ifdef __unix__ |
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int was_error; |
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#ifndef __linux__ /* Non-Linux implementations need to calculate time left */ |
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uint64 then, now, elapsed; |
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#endif |
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struct timeval tv; |
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|
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/* Set the timeout interval - Linux only needs to do this once */ |
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#ifdef __linux__ |
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tv.tv_sec = 0; |
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tv.tv_usec = usec; |
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#else |
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then = GetTicks_usec(); |
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#endif |
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do { |
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errno = 0; |
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#ifndef __linux__ |
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/* Calculate the time interval left (in case of interrupt) */ |
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now = GetTicks_usec(); |
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elapsed = (now-then); |
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then = now; |
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if ( elapsed >= usec ) { |
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break; |
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} |
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usec -= elapsed; |
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tv.tv_sec = 0; |
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tv.tv_usec = usec; |
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#endif |
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was_error = select(0, NULL, NULL, NULL, &tv); |
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} while (was_error && (errno == EINTR)); |
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#else |
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SDL_Delay(usec / 1000); |
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#endif |
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} |
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|
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|
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/* |
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* Main program |
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*/ |
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exit(0); |
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} |
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static void quit(void) |
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static void quit() |
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{ |
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ExitAll(); |
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SDL_Quit(); |
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// Print banner |
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printf( |
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PACKAGE " Version " VERSION "\n\n" |
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"Copyright (C) 1996-2001 Christian Bauer\n" |
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"Copyright (C) 1996-2004 Christian Bauer\n" |
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"E-mail: Christian.Bauer@uni-mainz.de\n" |
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"http://www.uni-mainz.de/~bauec002/\n\n" |
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"This is free software with ABSOLUTELY NO WARRANTY.\n" |
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} |
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atexit(quit); |
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InitAll(argc, argv); |
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int32 selected_speed = PrefsFindInt32("speed"); |
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int32 speed = PrefsFindInt32("speed"); |
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// Parse non-option arguments |
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const char *file_name = NULL; |
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SelectSong(song - 1); |
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} |
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SIDAdjustSpeed(speed); // SelectSong and LoadPSIDFile() reset this to 100% |
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|
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// Print file information |
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printf("Module Name: %s\n", module_name); |
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printf("Author : %s\n", author_name); |
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printf("Copyright : %s\n\n", copyright_info); |
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printf("Playing song %d/%d\n", current_song + 1, number_of_songs); |
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// Start replay and enter main loop |
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SIDAdjustSpeed(selected_speed); // SelectSong resets this to 100% |
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SDL_PauseAudio(false); |
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while (true) { |
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SDL_Event e; |
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if (SDL_WaitEvent(&e)) { |
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if (e.type == SDL_QUIT) |
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break; |
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// Replay or output to file? |
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const char *outfile = PrefsFindString("outfile"); |
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if (outfile) { |
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|
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// Open file |
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SDL_RWops *f = SDL_RWFromFile(outfile, "wb"); |
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if (f == NULL) { |
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fprintf(stderr, "Can't open '%s' for writing (%s)\n", outfile, strerror(errno)); |
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exit(1); |
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} |
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|
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// Get format information |
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int32 channels = (PrefsFindBool("stereo") ? 2 : 1); |
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int32 bits = (PrefsFindBool("audio16bit") ? 16 : 8); |
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int32 rate = PrefsFindInt32("samplerate"); |
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int32 time = PrefsFindInt32("time"); |
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int32 bytes_per_frame = channels * (bits / 8); |
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int32 bytes_per_second = rate * bytes_per_frame; |
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int32 data_length = time * bytes_per_second; |
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|
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// Write header |
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SDL_WriteLE32(f, 0x46464952); // "RIFF" |
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SDL_WriteLE32(f, 36 + data_length); |
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SDL_WriteLE32(f, 0x45564157); // "WAVE" |
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SDL_WriteLE32(f, 0x20746D66); // "fmt " |
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SDL_WriteLE32(f, 16); |
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SDL_WriteLE16(f, 1); |
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SDL_WriteLE16(f, channels); |
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SDL_WriteLE32(f, rate); |
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SDL_WriteLE32(f, bytes_per_second); |
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SDL_WriteLE16(f, bytes_per_frame); |
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SDL_WriteLE16(f, bits); |
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SDL_WriteLE32(f, 0x61746164); // "data" |
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SDL_WriteLE32(f, data_length); |
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|
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// Calculate sound and write to file |
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uint8 *buf = new uint8[bytes_per_second]; |
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for (int i=0; i<time; i++) { |
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SIDCalcBuffer(buf, bytes_per_second); |
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN |
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if (bits > 8) { |
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// WAV file is little-endian, swap audio data |
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for (int b=0; b<bytes_per_second; b+=2) { |
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uint8 tmp = buf[b]; |
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buf[b] = buf[b+1]; |
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buf[b+1] = tmp; |
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} |
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} |
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#endif |
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SDL_RWwrite(f, buf, bytes_per_second, 1); |
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} |
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delete[] buf; |
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|
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// Close file |
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SDL_RWclose(f); |
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printf("Output written to '%s'\n", outfile); |
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|
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} else if (PrefsFindBool("cwsid")) { |
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|
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// Catweasel output, requires manual timing |
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while (true) { |
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SIDExecute(); |
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|
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SDL_Event e; |
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if (SDL_PollEvent(&e)) { |
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if (e.type == SDL_QUIT) |
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break; |
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} |
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} |
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|
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} else { |
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|
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// Start replay and enter main loop |
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SDL_PauseAudio(false); |
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while (true) { |
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SDL_Event e; |
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if (SDL_WaitEvent(&e)) { |
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if (e.type == SDL_QUIT) |
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break; |
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} |
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} |
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} |
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