You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
0 B
98 lines
0 B
1 year ago
|
/* ------------------------------------------------------------------
|
||
|
|
* Copyright (C) 2009 Martin Storsjo
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
|
||
|
|
* express or implied.
|
||
|
|
* See the License for the specific language governing permissions
|
||
|
|
* and limitations under the License.
|
||
|
|
* -------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
#import <UIKit/UIkit.h>
|
||
|
|
#include "wav.h"
|
||
|
|
|
||
|
|
void WavWriter::writeString(const char *str) {
|
||
|
|
fputc(str[0], wav);
|
||
|
|
fputc(str[1], wav);
|
||
|
|
fputc(str[2], wav);
|
||
|
|
fputc(str[3], wav);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WavWriter::writeInt32(int value) {
|
||
|
|
fputc((value >> 0) & 0xff, wav);
|
||
|
|
fputc((value >> 8) & 0xff, wav);
|
||
|
|
fputc((value >> 16) & 0xff, wav);
|
||
|
|
fputc((value >> 24) & 0xff, wav);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WavWriter::writeInt16(int value) {
|
||
|
|
fputc((value >> 0) & 0xff, wav);
|
||
|
|
fputc((value >> 8) & 0xff, wav);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WavWriter::writeHeader(int length) {
|
||
|
|
writeString("RIFF");
|
||
|
|
writeInt32(4 + 8 + 20 + 8 + length); //将16改为20
|
||
|
|
writeString("WAVE");
|
||
|
|
|
||
|
|
writeString("fmt ");
|
||
|
|
writeInt32(20);
|
||
|
|
|
||
|
|
int bytesPerFrame = bitsPerSample/8*channels;
|
||
|
|
int bytesPerSec = bytesPerFrame*sampleRate;
|
||
|
|
writeInt16(1); // Format
|
||
|
|
writeInt16(channels); // Channels
|
||
|
|
writeInt32(sampleRate); // Samplerate
|
||
|
|
writeInt32(bytesPerSec); // Bytes per sec
|
||
|
|
writeInt16(bytesPerFrame); // Bytes per frame
|
||
|
|
writeInt16(bitsPerSample); // Bits per sample
|
||
|
|
|
||
|
|
writeInt32(0); //这儿需要字节对齐 nExSize
|
||
|
|
|
||
|
|
writeString("data");
|
||
|
|
writeInt32(length);
|
||
|
|
}
|
||
|
|
|
||
|
|
WavWriter::WavWriter(const char *filename, int sampleRate, int bitsPerSample, int channels)
|
||
|
|
{
|
||
|
|
|
||
|
|
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
|
||
|
|
NSString *documentPath = [paths objectAtIndex:0];
|
||
|
|
NSString *docFilePath = [documentPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%s", filename]];
|
||
|
|
// NSLog(@"documentPath=%@", documentPath);
|
||
|
|
|
||
|
|
wav = fopen([docFilePath cStringUsingEncoding:NSASCIIStringEncoding], "wb");
|
||
|
|
if (wav == NULL)
|
||
|
|
return;
|
||
|
|
dataLength = 0;
|
||
|
|
this->sampleRate = sampleRate;
|
||
|
|
this->bitsPerSample = bitsPerSample;
|
||
|
|
this->channels = channels;
|
||
|
|
|
||
|
|
writeHeader(dataLength);
|
||
|
|
}
|
||
|
|
|
||
|
|
WavWriter::~WavWriter() {
|
||
|
|
if (wav == NULL)
|
||
|
|
return;
|
||
|
|
fseek(wav, 0, SEEK_SET);
|
||
|
|
writeHeader(dataLength);
|
||
|
|
fclose(wav);
|
||
|
|
}
|
||
|
|
|
||
|
|
void WavWriter::writeData(const unsigned char* data, int length) {
|
||
|
|
if (wav == NULL)
|
||
|
|
return;
|
||
|
|
fwrite(data, length, 1, wav);
|
||
|
|
dataLength += length;
|
||
|
|
}
|
||
|
|
|