/*                                                     -*- linux-c -*-    Copyright (C) 2004 Tom Szilagyi    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., 675 Mass Ave, Cambridge, MA 02139, USA.    $Id: file_decoder.c,v 1.17 2006/09/21 20:36:52 pasp Exp $*/#include <config.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <errno.h>#include <unistd.h>#include <fcntl.h>#include <math.h>#include <time.h>#include <sys/stat.h>#include <gtk/gtk.h>#ifdef _WIN32#include <glib.h>#else#include <pthread.h>#endif /* _WIN32 */#include "file_decoder.h"#include "dec_null.h"#include "dec_sndfile.h"#include "dec_flac.h"#include "dec_vorbis.h"#include "dec_speex.h"#include "dec_mpc.h"#include "dec_mpeg.h"#include "dec_mod.h"#include "dec_mac.h"extern size_t sample_size;typedef decoder_t * decoder_init_t(file_decoder_t * fdec);/* this controls the order in which decoders are probed for a file */decoder_init_t * decoder_init_v[N_DECODERS] = {	null_decoder_init,	sndfile_decoder_init,	flac_decoder_init,	vorbis_decoder_init,	speex_dec_init,	mpc_decoder_init,	mac_decoder_init,	mpeg_decoder_init,	mod_decoder_init};/* utility function used by some decoders to check file extension */intis_valid_extension(char ** valid_extensions, char * filename, int module) {	int i;	char * c = NULL, * d = NULL;        char *ext;        /* post ext */        i = 0;	if ((c = strrchr(filename, '.')) != NULL) {                ++c;                while (valid_extensions[i] != NULL) {                        if (strcasecmp(c, valid_extensions[i]) == 0) {                                return 1;                        }                        ++i;                }	}        if (module) {      /* checking mod pre file extension */                           /* lots of amiga modules has EXT.NAME filename format */                /* pre ext */                i = 0;                ext = strdup(filename);                if (ext && (c = strrchr(ext, '/')) != NULL) {                        ++c;                        if ((d = strchr(ext, '.')) != NULL) {                                *d = '\0';                                while (valid_extensions[i] != NULL) {                                        if (strcasecmp(c, valid_extensions[i]) == 0) {                                                free(ext);                                                return 1;                                        }                                        ++i;                                }                        }                }                free(ext);        }	return 0;}file_decoder_t *file_decoder_new(void) {	file_decoder_t * fdec = NULL;		if ((fdec = calloc(1, sizeof(file_decoder_t))) == NULL) {		fprintf(stderr, "file_decoder.c: file_decoder_new() failed: calloc error\n");		return NULL;	}		fdec->file_open = 0;	fdec->voladj_db = 0.0f;	fdec->voladj_lin = 1.0f;	fdec->pdec = NULL;	return fdec;}voidfile_decoder_delete(file_decoder_t * fdec) {		if (fdec->file_open) {		file_decoder_close(fdec);	}	free(fdec);}/* return: 0 is OK, >0 is error */intfile_decoder_open(file_decoder_t * fdec, char * filename) {	int i, ret;	decoder_t * dec;	if (filename == NULL) {		fprintf(stderr, "Warning: filename == NULL passed to file_decoder_open()\n");		fprintf(stderr, "This is likely to be a programmer error, please report.\n");		return 1;	}	for (i = 0; i < N_DECODERS; i++) {		dec = decoder_init_v[i](fdec);		if (!dec) {			continue;		}		ret = dec->open(dec, filename);		if (ret == DECODER_OPEN_FERROR) {			goto no_open;		} else if (ret == DECODER_OPEN_BADLIB) {			continue;		} else if (ret != DECODER_OPEN_SUCCESS) {			printf("programmer error, please report: "			       "illegal retvalue %d from dec->open() at %d\n", ret, i);			return 1;		}		fdec->pdec = (void *)dec;		break;	}	if (i == N_DECODERS) {	        goto no_open;	}	if (fdec->channels == 1) {		fdec->fileinfo.is_mono = 1;		goto ok_open;	} else if (fdec->channels == 2) {		fdec->fileinfo.is_mono = 0;		goto ok_open;	} else {		fprintf(stderr, "file_decoder_open: programmer error: "			"soundfile with %d\n channels is unsupported.\n", fdec->channels);		goto no_open;	} ok_open:	fdec->fileinfo.sample_rate = fdec->SR;	fdec->file_open = 1;	fdec->samples_left = fdec->fileinfo.total_samples;	return 0; no_open:	fprintf(stderr, "file_decoder_open: unable to open %s\n", filename);	return 1;}voidfile_decoder_set_rva(file_decoder_t * fdec, float voladj) {	fdec->voladj_db = voladj;	fdec->voladj_lin = db2lin(voladj);}voidfile_decoder_close(file_decoder_t * fdec) {	decoder_t * dec;	if (!fdec->file_open) {		return;	}	dec = (decoder_t *)(fdec->pdec);	dec->close(dec);	dec->destroy(dec);	fdec->pdec = NULL;	fdec->file_open = 0;	fdec->file_lib = 0;}unsigned intfile_decoder_read(file_decoder_t * fdec, float * dest, int num) {	decoder_t * dec = (decoder_t *)(fdec->pdec);	return dec->read(dec, dest, num);}voidfile_decoder_seek(file_decoder_t * fdec, unsigned long long seek_to_pos) {	decoder_t * dec = (decoder_t *)(fdec->pdec);	dec->seek(dec, seek_to_pos);} floatget_file_duration(char * file) {	file_decoder_t * fdec;	float duration;	if ((fdec = file_decoder_new()) == NULL) {                fprintf(stderr, "get_file_duration: error: file_decoder_new() returned NULL\n");                return 0.0f;        }        if (file_decoder_open(fdec, file)) {                fprintf(stderr, "file_decoder_open() failed on %s\n", file);                return 0.0f;        }	duration = (float)fdec->fileinfo.total_samples / fdec->fileinfo.sample_rate;        file_decoder_close(fdec);        file_decoder_delete(fdec);	return duration;}// vim: shiftwidth=8:tabstop=8:softtabstop=8 :