diff options
Diffstat (limited to 'iemlib1/src/soundfile_info.c')
-rw-r--r-- | iemlib1/src/soundfile_info.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/iemlib1/src/soundfile_info.c b/iemlib1/src/soundfile_info.c new file mode 100644 index 0000000..2b0903d --- /dev/null +++ b/iemlib1/src/soundfile_info.c @@ -0,0 +1,256 @@ +/* For information on usage and redistribution, and for a DISCLAIMER OF ALL +* WARRANTIES, see the file, "LICENSE.txt," in this distribution. + +iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006 */ + +#include "m_pd.h" +#include "iemlib.h" +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <math.h> + +#define SFI_HEADER_SAMPLERATE 0 +#define SFI_HEADER_FILENAME 1 +#define SFI_HEADER_MULTICHANNEL_FILE_LENGTH 2 +#define SFI_HEADER_HEADERBYTES 3 +#define SFI_HEADER_CHANNELS 4 +#define SFI_HEADER_BYTES_PER_SAMPLE 5 +#define SFI_HEADER_ENDINESS 6 + +#define SFI_HEADER_SIZE 7 + + + +/* --------------------------- soundfile_info -------------------------------- */ +/* -- reads only header of a wave-file and outputs the important parameters -- */ + +static t_class *soundfile_info_class; + +typedef struct _soundfile_info +{ + t_object x_obj; + long *x_begmem; + int x_size; + t_atom x_atheader[SFI_HEADER_SIZE]; + t_canvas *x_canvas; + void *x_list_out; +} t_soundfile_info; + +static short soundfile_info_str2short(char *cvec) +{ + short s=0; + unsigned char *uc=(unsigned char *)cvec; + + s += (short)(*uc); + s += (short)(*(uc+1)*256); + return(s); +} + +static long soundfile_info_str2long(char *cvec) +{ + long l=0; + unsigned char *uc=(unsigned char *)cvec; + + l += (long)(*uc); + l += (long)(*(uc+1)*256); + l += (long)(*(uc+2)*65536); + l += (long)(*(uc+3)*16777216); + return(l); +} + +static void soundfile_info_read(t_soundfile_info *x, t_symbol *filename) +{ + char completefilename[400]; + int i, n, n2, n4, filesize, read_chars, header_size=0, ch, bps, sr; + FILE *fh; + t_atom *at; + char *cvec; + long ll; + short ss; + + if(filename->s_name[0] == '/')/*make complete path + filename*/ + { + strcpy(completefilename, filename->s_name); + } + else if(((filename->s_name[0] >= 'A')&&(filename->s_name[0] <= 'Z')|| + (filename->s_name[0] >= 'a')&&(filename->s_name[0] <= 'z'))&& + (filename->s_name[1] == ':')&&(filename->s_name[2] == '/')) + { + strcpy(completefilename, filename->s_name); + } + else + { + strcpy(completefilename, canvas_getdir(x->x_canvas)->s_name); + strcat(completefilename, "/"); + strcat(completefilename, filename->s_name); + } + + fh = fopen(completefilename,"rb"); + if(!fh) + { + post("soundfile_info_read: cannot open %s !!\n", completefilename); + } + else + { + n = x->x_size; + n2 = sizeof(short) * x->x_size; + n4 = sizeof(long) * x->x_size; + fseek(fh, 0, SEEK_END); + filesize = ftell(fh); + fseek(fh,0,SEEK_SET); + read_chars = (int)fread(x->x_begmem, sizeof(char), n4, fh) /2; + fclose(fh); + // post("read chars = %d", read_chars); + cvec = (char *)x->x_begmem; + if(read_chars > 4) + { + if(strncmp(cvec, "RIFF", 4)) + { + post("soundfile_info_read-error: %s is no RIFF-WAVE-file", completefilename); + goto soundfile_info_end; + } + header_size += 8; + cvec += 8; + if(strncmp(cvec, "WAVE", 4)) + { + post("soundfile_info_read-error: %s is no RIFF-WAVE-file", completefilename); + goto soundfile_info_end; + } + header_size += 4; + cvec += 4; + + for(i=header_size/2; i<read_chars; i++) + { + if(!strncmp(cvec, "fmt ", 4)) + goto soundfile_info_fmt; + header_size += 2; + cvec += 2; + } + post("soundfile_info_read-error: %s has at begin no format-chunk", completefilename); + goto soundfile_info_end; + +soundfile_info_fmt: + header_size += 4; + cvec += 4; + ll = soundfile_info_str2long(cvec); + if(ll != 16) + { + post("soundfile_info_read-error: %s has a format-chunk not equal to 16", completefilename); + goto soundfile_info_end; + } + header_size += 4; + cvec += 4; + ss = soundfile_info_str2short(cvec); + /* format */ + if(ss != 1) /* PCM = 1 */ + { + post("soundfile_info_read-error: %s is not PCM-format coded", completefilename); + goto soundfile_info_end; + } + header_size += 2; + cvec += 2; + ss = soundfile_info_str2short(cvec); + /* channels */ + if((ss < 1) || (ss > 100)) + { + post("soundfile_info_read-error: %s has no common channel-number", completefilename); + goto soundfile_info_end; + } + SETFLOAT(x->x_atheader+SFI_HEADER_CHANNELS, (t_float)ss); + ch = ss; + header_size += 2; + cvec += 2; + ll = soundfile_info_str2long(cvec); + /* samplerate */ + if((ll > 400000) || (ll < 200)) + { + post("soundfile_info_read-error: %s has no common samplerate", completefilename); + goto soundfile_info_end; + } + SETFLOAT(x->x_atheader+SFI_HEADER_SAMPLERATE, (t_float)ll); + sr = ll; + header_size += 4; + cvec += 4; + + header_size += 4; /* bytes_per_sec */ + cvec += 4; + ss = soundfile_info_str2short(cvec); + + /* bytes_per_sample */ + if((ss < 1) || (ss > 100)) + { + post("soundfile_info_read-error: %s has no common number of bytes per sample", completefilename); + goto soundfile_info_end; + } + SETFLOAT(x->x_atheader+SFI_HEADER_BYTES_PER_SAMPLE, (t_float)(ss/ch)); + bps = ss; + header_size += 2; + cvec += 2; + + header_size += 2; /* bits_per_sample */ + cvec += 2; + + for(i=header_size/2; i<read_chars; i++) + { + if(!strncmp(cvec, "data", 4)) + goto soundfile_info_data; + header_size += 2; + cvec += 2; + } + post("soundfile_info_read-error: %s has at begin no data-chunk", completefilename); + goto soundfile_info_end; + +soundfile_info_data: + header_size += 8; + cvec += 8; + + SETFLOAT(x->x_atheader+SFI_HEADER_HEADERBYTES, (t_float)header_size); + + filesize -= header_size; + filesize /= bps; + SETFLOAT(x->x_atheader+SFI_HEADER_MULTICHANNEL_FILE_LENGTH, (t_float)filesize); + SETSYMBOL(x->x_atheader+SFI_HEADER_ENDINESS, gensym("l")); + SETSYMBOL(x->x_atheader+SFI_HEADER_FILENAME, gensym(completefilename)); + + /* post("ch = %d", ss); + post("sr = %d", ll); + post("bps = %d", ss/ch); + post("head = %d", header_size); + post("len = %d", filesize);*/ + + outlet_list(x->x_list_out, &s_list, SFI_HEADER_SIZE, x->x_atheader); + + +soundfile_info_end: + + ; + } + } +} + +static void soundfile_info_free(t_soundfile_info *x) +{ + freebytes(x->x_begmem, x->x_size * sizeof(long)); +} + +static void *soundfile_info_new(void) +{ + t_soundfile_info *x = (t_soundfile_info *)pd_new(soundfile_info_class); + + x->x_size = 10000; + x->x_begmem = (long *)getbytes(x->x_size * sizeof(long)); + x->x_list_out = outlet_new(&x->x_obj, &s_list); + x->x_canvas = canvas_getcurrent(); + return (x); +} + +/* ---------------- global setup function -------------------- */ + +void soundfile_info_setup(void) +{ + soundfile_info_class = class_new(gensym("soundfile_info"), (t_newmethod)soundfile_info_new, + (t_method)soundfile_info_free, sizeof(t_soundfile_info), 0, 0); + class_addmethod(soundfile_info_class, (t_method)soundfile_info_read, gensym("read"), A_SYMBOL, 0); +// class_sethelpsymbol(soundfile_info_class, gensym("iemhelp/help-soundfile_info")); +} |