diff options
Diffstat (limited to 'iemlib1/src/soundfile_info.c')
| -rw-r--r-- | iemlib1/src/soundfile_info.c | 182 |
1 files changed, 181 insertions, 1 deletions
diff --git a/iemlib1/src/soundfile_info.c b/iemlib1/src/soundfile_info.c index 654f71a..f018370 100644 --- a/iemlib1/src/soundfile_info.c +++ b/iemlib1/src/soundfile_info.c @@ -61,6 +61,186 @@ static unsigned long soundfile_info_string_to_uint32(char *cvec) return(ul); } +static void soundfile_info_uint32_to_string(char *cvec, unsigned long ul) +{ + unsigned char *uc=(unsigned char *)cvec; + + *uc = (unsigned char)(0x000000ff & ul); + *(uc+1) = (unsigned char)(0x000000ff & (ul/256)); + *(uc+2) = (unsigned char)(0x000000ff & (ul/65536)); + *(uc+3) = (unsigned char)(0x000000ff & (ul/16777216)); + return; +} + +static void soundfile_info_overwrite_sr(t_soundfile_info *x, t_symbol *filename, t_floatarg new_sr) +{ + char completefilename[400]; + int i, n, n2, n4, filesize, read_chars, header_size=0, ch, bytesperframe, sr, n_frames; + FILE *fh; + t_atom *at; + char *cvec; + unsigned long ul_chunk_size, ul_sr; + short ss_format, ss_ch, ss_bytesperframe; + + 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,"r+b"); + if(!fh) + { + post("soundfile_info_read: cannot open %s !!\n", completefilename); + } + else + { + n = x->x_mem_size; // 10000 bytes + n2 = sizeof(short) * x->x_mem_size; + n4 = sizeof(long) * x->x_mem_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; + // 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 sr_soundfile_info_end; + } + header_size += 8; // jump over RIFF chunk size + cvec += 8; + if(strncmp(cvec, "WAVE", 4)) + { + post("soundfile_info_read-error: %s is no RIFF-WAVE-file", completefilename); + goto sr_soundfile_info_end; + } + header_size += 4; + cvec += 4; + + for(i=header_size/2; i<read_chars; i++) + { + if(!strncmp(cvec, "fmt ", 4)) + { + header_size += 4; + cvec += 4; + goto sr_soundfile_info_fmt; + } + header_size += 2; + cvec += 2; + } + post("soundfile_info_read-error: %s has at begin no format-chunk", completefilename); + goto sr_soundfile_info_end; + + sr_soundfile_info_fmt: + ul_chunk_size = soundfile_info_string_to_uint32(cvec); + if(ul_chunk_size < 16) + { + post("soundfile_info_read-error: %s has a format-chunk less than 16", completefilename); + goto sr_soundfile_info_end; + } + header_size += 4; + cvec += 4; + + ss_format = soundfile_info_string_to_int16(cvec); + if((ss_format != 1) && (ss_format != 3) && (ss_format != 6) && (ss_format != 7) && (ss_format != -2)) /* PCM = 1 ; IEEE-FLOAT = 3 ; ALAW = 6 ; MULAW = 7 ; WAVE_EX = -2 */ + { + post("soundfile_info_read-error: %s has unknown format code", completefilename); + goto sr_soundfile_info_end; + } + header_size += 2; + cvec += 2; + + ss_ch = soundfile_info_string_to_int16(cvec); /* channels */ + if((ss_ch < 1) || (ss_ch > 32000)) + { + post("soundfile_info_read-error: %s has no common channel-number", completefilename); + goto sr_soundfile_info_end; + } + SETFLOAT(x->x_at_header+SFI_HEADER_CHANNELS, (t_float)ss_ch); + ch = (int)ss_ch; + header_size += 2; + cvec += 2; + + ul_sr = soundfile_info_string_to_uint32(cvec); /* samplerate */ + if((ul_sr > 2000000000) || (ul_sr < 1)) + { + post("soundfile_info_read-error: %s has no common samplerate", completefilename); + goto sr_soundfile_info_end; + } + ul_sr = (unsigned long)new_sr; + soundfile_info_uint32_to_string(cvec, ul_sr); + + fseek(fh,0,SEEK_SET); + read_chars = (int)fwrite (x->x_begmem, sizeof(char), n4, fh); + fclose(fh); + post("written"); + + sr = (int)ul_sr; + header_size += 4; + cvec += 4; + + header_size += 4; /* jump over bytes_per_sec */ + cvec += 4; + + ss_bytesperframe = soundfile_info_string_to_int16(cvec); /* bytes_per_frame */ + if((ss_bytesperframe < 1) || (ss_bytesperframe > 32000)) + { + post("soundfile_info_read-error: %s has no common number of bytes per frame", completefilename); + goto sr_soundfile_info_end; + } + + bytesperframe = (int)ss_bytesperframe; + header_size += 2; + cvec += 2; + + header_size += 2; /* jump over bits_per_sample */ + cvec += 2; + + for(i=header_size/2; i<read_chars; i++) // looking for data chunk + { + if(!strncmp(cvec, "data", 4)) + goto sr_soundfile_info_data; + header_size += 2; + cvec += 2; + } + post("soundfile_info_read-error: %s has at begin no data-chunk", completefilename); + goto sr_soundfile_info_end; + + sr_soundfile_info_data: + header_size += 8; // ignore data chunk size + cvec += 8; + + + + /* post("ch = %d", ch); + post("sr = %d", sr); + post("bpf = %d", bytesperframe/ch); + post("head = %d", header_size); + post("len = %d", n_frames);*/ + + + sr_soundfile_info_end: + + ; + } + } +} + static void soundfile_info_read(t_soundfile_info *x, t_symbol *filename) { char completefilename[400]; @@ -255,5 +435,5 @@ 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")); + class_addmethod(soundfile_info_class, (t_method)soundfile_info_overwrite_sr, gensym("overwrite_sr"), A_SYMBOL, A_FLOAT, 0); } |