madplaymp3

/* * madplay - MPEG audio decoder and player * Copyright (C) 2000-2004 Robert Leslie * * This program 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 of the License, or * (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * $Id: player.c,v 1.69 2004/02/23 21:34:53 rob Exp $ */ # ifdef HAVE_CONFIG_H # include "config.h" # endif # include "global.h" # include <stdio.h> # include <stdarg.h> # include <stdlib.h> # ifdef HAVE_SYS_TYPES_H # include <sys/types.h> # endif # include <sys/stat.h> # ifdef HAVE_FCNTL_H # include <fcntl.h> # endif # ifdef HAVE_UNISTD_H # include <unistd.h> # endif # include <string.h> # ifdef HAVE_ERRNO_H # include <errno.h> # endif # include <time.h> # include <locale.h> # include <math.h> # ifdef HAVE_TERMIOS_H # include <termios.h> # endif # ifdef _WIN32 # include <windows.h> # endif # include <signal.h> # ifdef HAVE_ASSERT_H # include <assert.h> # endif # if defined(HAVE_MMAP) # include <sys/mman.h> # endif # if !defined(O_BINARY) # define O_BINARY 0 # endif # include <mad.h> # include <id3tag.h> # include "gettext.h" # include "player.h" # include "audio.h" # include "resample.h" # include "filter.h" # include "tag.h" # include "rgain.h" # define MPEG_BUFSZ 40000 /* 2.5 s at 128 kbps; 1 s at 320 kbps */ # define FREQ_TOLERANCE 2 /* percent sampling frequency tolerance */ # define TTY_DEVICE "/dev/tty" # define KEY_CTRL(key) ((key) & 0x1f) enum { KEY_PAUSE = 'p', KEY_STOP = 's', KEY_FORWARD = 'f', KEY_BACK = 'b', KEY_TIME = 't', KEY_QUIT = 'q', KEY_INFO = 'i', KEY_GAINDECR = '-', KEY_GAININCR = '+', KEY_GAINZERO = '_', KEY_GAININFO = '=' }; static int on_same_line; # if defined(USE_TTY) && !defined(_WIN32) static int tty_fd = -1; static struct termios save_tty; static struct sigaction save_sigtstp, save_sigint; # endif /* * NAME: player_init() * DESCRIPTION: initialize player structure */ void player_init(struct player *player) { player->verbosity = 0; player->options = 0; player->repeat = 1; player->control = PLAYER_CONTROL_DEFAULT; player->playlist.entries = 0; player->playlist.length = 0; player->playlist.current = 0; player->global_start = mad_timer_zero; player->global_stop = mad_timer_zero; player->fade_in = mad_timer_zero; player->fade_out = mad_timer_zero; player->gap = mad_timer_zero; player->input.path = 0; player->input.fd = -1; # if defined(HAVE_MMAP) player->input.fdm = 0; # endif player->input.data = 0; player->input.length = 0; player->input.eof = 0; tag_init(&player->input.tag); player->output.mode = AUDIO_MODE_DITHER; player->output.voladj_db = 0; player->output.attamp_db = 0; player->output.gain = MAD_F_ONE; player->output.replay_gain = 0; player->output.filters = 0; player->output.channels_in = 0; player->output.channels_out = 0; player->output.select = PLAYER_CHANNEL_DEFAULT; player->output.speed_in = 0; player->output.speed_out = 0; player->output.speed_request = 0; player->output.precision_in = 0; player->output.precision_out = 0; player->output.path = 0; player->output.command = 0; /* player->output.resample */ player->output.resampled = 0; player->ancillary.path = 0; player->ancillary.file = 0; player->ancillary.buffer = 0; player->ancillary.length = 0; player->stats.show = STATS_SHOW_OVERALL; player->stats.label = 0; player->stats.total_bytes = 0; player->stats.total_time = mad_timer_zero; player->stats.global_timer = mad_timer_zero; player->stats.absolute_timer = mad_timer_zero; player->stats.play_timer = mad_timer_zero; player->stats.global_framecount = 0; player->stats.absolute_framecount = 0; player->stats.play_framecount = 0; player->stats.error_frame = -1; player->stats.mute_frame = 0; player->stats.vbr = 0; player->stats.bitrate = 0; player->stats.vbr_frames = 0; player->stats.vbr_rate = 0; player->stats.nsecs = 0; player->stats.audio.clipped_samples = 0; player->stats.audio.peak_clipping = 0; player->stats.audio.peak_sample = 0; } /* * NAME: player_finish() * DESCRIPTION: destroy a player structure */ void player_finish(struct player *player) { if (player->output.filters) filter_free(player->output.filters); if (player->output.resampled) { resample_finish(&player->output.resample[0]); resample_finish(&player->output.resample[1]); free(player->output.resampled); player->output.resampled = 0; } } /* * NAME: message() * DESCRIPTION: show a message, possibly overwriting a previous w/o newline */ static int message(char const *format, ...) { int len, newline, result; va_list args; len = strlen(format); newline = (len > 0 && format[len - 1] == '\n'); if (on_same_line && newline && len > 1) fputc('\n', stderr); va_start(args, format); result = vfprintf(stderr, format, args); va_end(args); if (on_same_line && !newline && result < on_same_line) { unsigned int i; i = on_same_line - result; while (i--) putc(' ', stderr); } on_same_line = newline ? 0 : result; if (!newline) { fputc('\r', stderr); fflush(stderr); } return result; } /* * NAME: detail() * DESCRIPTION: show right-aligned label and line-wrap corresponding text */ static void detail(char const *label, char const *format, ...) { char const spaces[] = " "; va_list args; # define LINEWRAP (80 - sizeof(spaces) - 2 - 2) if (on_same_line) message("\n"); if (label) { unsigned int len; len = strlen(label); assert(len < sizeof(spaces)); fprintf(stderr, "%s%s: ", &spaces[len], label); } else fprintf(stderr, "%s ", spaces); va_start(args, format); if (format) { vfprintf(stderr, format, args); fputc('\n', stderr); } else { char *ptr, *newline, *linebreak; /* N.B. this argument must be mutable! */ ptr = va_arg(args, char *); do { newline = strchr(ptr, '\n'); if (newline) *newline = 0; if (strlen(ptr) > LINEWRAP) { linebreak = ptr + LINEWRAP; while (linebreak > ptr && *linebreak != ' ') --linebreak; if (*linebreak == ' ') { if (newline) *newline = '\n'; *(newline = linebreak) = 0; } } fprintf(stderr, "%s\n", ptr); if (newline) { ptr = newline + 1; fprintf(stderr, "%s ", spaces); } } while (newline); } va_end(args); } /* * NAME: error() * DESCRIPTION: show an error using proper interaction with message() */ static void error(char const *id, char const *format, ...) { int err; va_list args; err = errno; if (on_same_line) message("\n"); if (id) fprintf(stderr, "%s: ", id); va_start(args, format); if (*format == ':') { if (format[1] == 0) { format = va_arg(args, char const *); errno = err; perror(format); } else { errno = err; perror(format + 1); } } else { vfprintf(stderr, format, args); fputc('\n', stderr); } va_end(args); } # if defined(HAVE_MMAP) /* * NAME: map_file() * DESCRIPTION: