From 6d8f5df63e751d9c4ad388bef546b1fe872e78d2 Mon Sep 17 00:00:00 2001 From: kramm Date: Wed, 12 Oct 2005 18:33:40 +0000 Subject: [PATCH] *** empty log message *** --- src/wav.c | 255 ------------------------------------------------------------- src/wav.h | 26 ------- 2 files changed, 281 deletions(-) delete mode 100644 src/wav.c delete mode 100644 src/wav.h diff --git a/src/wav.c b/src/wav.c deleted file mode 100644 index a3cc371..0000000 --- a/src/wav.c +++ /dev/null @@ -1,255 +0,0 @@ -/* wav.c - Routines for handling .wav files - - Part of the swftools package. - - Copyright (c) 2001 Matthias Kramm - - 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 */ - -#include -#include -#include -#include "wav.h" - -struct WAVBlock { - char id[4]; - unsigned int size; -}; - -int getWAVBlock(FILE*fi, struct WAVBlock*block) -{ - unsigned int size; - unsigned char b[4]; - if(fread(block->id,1,4,fi)<4) - return 0; - if(fread(b,1,4,fi)<4) - return 0; - block->size = b[0]|b[1]<<8|b[2]<<16|b[3]<<24; - /*printf("Chunk: [%c%c%c%c] (%d bytes)\n", - block->id[0],block->id[1], - block->id[2],block->id[3], - block->size);*/ - return 1; -} - -int readWAV(char* filename, struct WAV*wav) -{ - FILE*fi = fopen(filename, "rb"); - unsigned char b[16]; - long int filesize; - struct WAVBlock block; - long int pos; - if(!fi) - return 0; - fseek(fi, 0, SEEK_END); - filesize = ftell(fi); - fseek(fi, 0, SEEK_SET); - - //printf("Filesize: %d\n", filesize); - - if(!getWAVBlock (fi, &block)) - return 0; - if(strncmp(block.id,"RIFF",4)) { - fprintf(stderr, "readWAV: not a wav file\n"); - return 0; - } - if(block.size + 8 < filesize) - fprintf(stderr, "readWAV: warning - more tags (%d extra bytes)\n", - filesize - block.size - 8); - if(block.size + 8 > filesize) - fprintf(stderr, "readWAV: warning - short file (%d bytes missing)\n", - block.size + 8 - filesize); - if(fread(b, 1, 4, fi) < 4) { - return 0; - } - if(strncmp(b, "WAVE", 4)) { - fprintf(stderr, "readWAV: not a WAV file (2)\n"); - return 0; - } - - do - { - getWAVBlock(fi, &block); - pos = ftell(fi); - if(!strncmp(block.id, "fmt ", 4)) { - if(fread(&b, 1, 16, fi)<16) - return 0; - wav->tag = b[0]|b[1]<<8; - wav->channels = b[2]|b[3]<<8; - wav->sampsPerSec = b[4]|b[5]<<8|b[6]<<16|b[7]<<24; - wav->bytesPerSec = b[8]|b[9]<<8|b[10]<<16|b[11]<<24; - wav->align = b[12]|b[13]<<8; - wav->bps = b[14]|b[15]<<8; - } else if (!strncmp(block.id, "LIST", 4)) { - // subchunk ICMT (comment) may exist - } else if (!strncmp(block.id, "data", 4)) { - wav->data = malloc(block.size); - if(!wav->data) { - fprintf(stderr, "Out of memory (%d bytes needed)", block.size); - return 0; - } - if(fread(wav->data, 1, block.size, fi) < block.size) - return 0; - wav->size = block.size; - } - pos+=block.size; - fseek(fi, pos, SEEK_SET); - } - while (pos < filesize); - - return 1; -} - -int writeWAV(char*filename, struct WAV*wav) -{ - FILE*fi = fopen(filename, "wb"); - char*b="RIFFWAVEfmt \x10\0\0\0data"; - char c[16]; - unsigned long int w32; - if(!fi) - return 0; - fwrite(b, 4, 1, fi); - w32=(/*fmt*/8+0x10+/*data*/8+wav->size); - c[0] = w32; - c[1] = w32>>8; - c[2] = w32>>16; - c[3] = w32>>24; - fwrite(c, 4, 1, fi); - fwrite(&b[4], 12, 1, fi); - c[0] = wav->tag; - c[1] = wav->tag>>8; - c[2] = wav->channels; - c[3] = wav->channels>>8; - c[4] = wav->sampsPerSec; - c[5] = wav->sampsPerSec>>8; - c[6] = wav->sampsPerSec>>16; - c[7] = wav->sampsPerSec>>24; - c[8] = wav->bytesPerSec; - c[9] = wav->bytesPerSec>>8; - c[10] = wav->bytesPerSec>>16; - c[11] = wav->bytesPerSec>>24; - c[12] = wav->align; - c[13] = wav->align>>8; - c[14] = wav->bps; - c[15] = wav->bps>>8; - fwrite(c, 16, 1, fi); - fwrite(&b[16], 4, 1, fi); - c[0] = wav->size; - c[1] = wav->size>>8; - c[2] = wav->size>>16; - c[3] = wav->size>>24; - fwrite(c,4,1,fi); - printf("writing %d converted bytes\n", wav->size); - fwrite(wav->data,wav->size,1,fi); - fclose(fi); - return 1; -} - -void printWAVInfo(struct WAV*wav) -{ - printf("tag:%04x channels:%d samples/sec:%d bytes/sec:%d align:%d bits/sample:%d size:%d\n", - wav->tag, wav->channels, wav->sampsPerSec, wav->bytesPerSec, - wav->align, wav->bps, wav->size); -} - -int convertWAV2mono(struct WAV*src, struct WAV*dest, int rate) -{ - int samplelen=src->size/src->align; - int bps=src->bps; - double ratio; - double pos = 0; - int pos2 = 0; - int channels=src->channels; - int i; - int fill; - - dest->sampsPerSec = rate; - dest->bps = 16; - dest->channels = 1; - dest->align = 2; - dest->tag = src->tag; - dest->bytesPerSec = dest->sampsPerSec*dest->align; - - ratio = (double)dest->sampsPerSec/(double)src->sampsPerSec; - fill = (int)(ratio+1)*2; - - dest->data = (unsigned char*)malloc((int)(samplelen*ratio*2)+128); - if(!dest->data) - return 0; - dest->size = (int)(samplelen*ratio)*2; - - if(bps == 8) { - if(ratio <= 1) { - for(i=0; isize; i+=channels) { - int pos2 = ((int)pos)*2; - dest->data[pos2] = 0; - dest->data[pos2+1] = src->data[i]+128; - pos += ratio; - } - } else { - for(i=0; isize; i+=channels) { - int j; - int pos2 = ((int)pos)*2; - for(j=0;jdata[pos2+j+0] = 0; - dest->data[pos2+j+1] = src->data[i]+128; - } - pos += ratio; - } - } - } else if(bps == 16) { - if(ratio <= 1) { - for(i=0; isize/2; i+=channels) { - int pos2 = ((int)pos)*2; - dest->data[pos2+0]=src->data[i*2]; - dest->data[pos2+1]=src->data[i*2+1]; - pos += ratio; - } - } else { - for(i=0; isize/2; i+=channels) { - int j; - int pos2 = ((int)pos)*2; - for(j=0;jdata[pos2+j+0] = src->data[i*2]; - dest->data[pos2+j+1] = src->data[i*2+1]; - } - pos += ratio; - } - } - } else if(bps == 32) { - if(ratio <= 1) { - for(i=0; isize/4; i+=channels) { - int pos2 = ((int)pos)*2; - dest->data[pos2+0]=src->data[i*4+2]; - dest->data[pos2+1]=src->data[i*4+3]; - pos += ratio; - } - } else { - for(i=0; isize/4; i+=channels) { - int j; - int pos2 = ((int)pos)*2; - for(j=0;jdata[pos2+j+0] = src->data[i*4+2]; - dest->data[pos2+j+1] = src->data[i*4+3]; - } - pos += ratio; - } - } - } - return 1; -} - - diff --git a/src/wav.h b/src/wav.h deleted file mode 100644 index c671df8..0000000 --- a/src/wav.h +++ /dev/null @@ -1,26 +0,0 @@ -/* wav.h - Header file for wav.c - - Part of the swftools package. - - Copyright (c) 2001 Matthias Kramm - - This file is distributed under the GPL, see file COPYING for details */ - -struct WAV { - unsigned short tag; - unsigned short channels; - unsigned long sampsPerSec; - unsigned long bytesPerSec; - unsigned short align; - unsigned short bps; - - unsigned char*data; - unsigned int size; -}; - -int readWAV(char* filename, struct WAV*wav); -int writeWAV(char*filename, struct WAV*wav); -void printWAVInfo(struct WAV*wav); -int convertWAV2mono(struct WAV*src, struct WAV*dest, int rate); - -- 1.7.10.4