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c語言怎么寫打開wav
在C語言中，我們可以使用第三方庫來打開和處理WAV文件，一個(gè)常用的庫是libsndfile，它是一個(gè)用于讀取、寫入和操作音頻文件的庫，以下是如何使用libsndfile庫打開WAV文件的詳細(xì)步驟：
1、確保已經(jīng)安裝了libsndfile庫，在Linux系統(tǒng)上，可以使用以下命令安裝：
sudo aptget install libsndfile1dev
在Windows系統(tǒng)上，可以從官方網(wǎng)站下載源代碼并編譯，或者從第三方網(wǎng)站下載預(yù)編譯的庫。
2、創(chuàng)建一個(gè)名為wav_reader.c的C文件，并在其中包含以下頭文件：
#include#include #include #include
3、編寫一個(gè)名為open_wav_file的函數(shù)，該函數(shù)接受一個(gè)文件名作為參數(shù)，并返回一個(gè)指向SF_INFO結(jié)構(gòu)的指針，這個(gè)結(jié)構(gòu)包含了WAV文件的信息，如采樣率、通道數(shù)等。
SF_INFO *open_wav_file(const char *filename) {
SF_INFO sfinfo;
SNDFILE *sndfile = NULL;
sfinfo.format = 0;
sfinfo.channels = 0;
sfinfo.samplerate = 0;
sfinfo.frames = 0;
sfinfo.sections = 0;
sfinfo.seekable = 0;
sfinfo.tellable = 0;
sfinfo.readable = 1;
sfinfo.writeable = 0;
sfinfo.maxlength = 0;
sfinfo.type = 0;
sfinfo.signal = 0;
sfinfo.offset = 0;
sfinfo.underflow = 0;
sfinfo.overflow = 0;
sfinfo.eof = 0;
sfinfo.error = 0;
sfinfo.comm = NULL;
sfinfo.userdata = NULL;
sfinfo.container = NULL;
sfinfo.num_subclasses = 0;
sfinfo.next_subclass = NULL;
memset(&sfinfo, 0, sizeof(SF_INFO));
if ((sndfile = sf_open(filename, SFM_READ, &sfinfo)) == NULL) {
printf("Error: Unable to open WAV file '%s'
", filename);
return NULL;
}
return &sfinfo;
}
4、編寫一個(gè)名為main的函數(shù)，用于測(cè)試open_wav_file函數(shù)，在這個(gè)函數(shù)中，我們將調(diào)用open_wav_file函數(shù)打開一個(gè)WAV文件，并打印出文件的信息。
int main(int argc, char *argv[]) {
if (argc != 2) {
printf("Usage: %s
", argv[0]);
return 1;
}
SF_INFO *sfinfo = open_wav_file(argv[1]);
if (sfinfo == NULL) {
return 1;
}
printf("File format: %d
", sfinfo>format & SF_FORMAT_TYPEMASK);
printf("Channels: %d
", sfinfo>channels);
printf("Sample rate: %d
", sfinfo>samplerate);
printf("Frames: %ld
", sfinfo>frames);
printf("Sections: %d
", sfinfo>sections);
printf("Seekable: %d
", sfinfo>seekable);
printf("Tellable: %d
", sfinfo>tellable);
printf("Readable: %d
", sfinfo>readable);
printf("Writeable: %d
", sfinfo>writeable);
printf("Max length: %ld
", sfinfo>maxlength);
printf("Type: %d
", sfinfo>type);
printf("Signal: %d
", sfinfo>signal);
printf("Offset: %ld
", sfinfo>offset);
printf("Underflow: %d
", sfinfo>underflow);
printf("Overflow: %d
", sfinfo>overflow);
printf("EOF: %d
", sfinfo>eof);
printf("Error: %d
", sfinfo>error);
printf("Comm status: %d
", sfinfo>comm_status);
printf("User data pointer: %p
", sfinfo>userdata);
printf("Container type: %d
", sfinfo>container_type);
printf("Num subclasses: %d
", sfinfo>num_subclasses);
printf("Next subclass: %p
", sfinfo>next_subclass);
sf_close(sndfile);
free(sfinfo);
return 0;
}
5、編譯并運(yùn)行程序，在終端中，使用以下命令編譯wav_reader.c文件：
gcc o wav_reader wav_reader.c lsndfile lm lpthread lz lrt lresolv ldl Wl,rpath,/usr/local/lib L/usr/local/lib I/usr/local/include/libsndfile1 Wl,R/usr/local/lib Wl,enablenewdtags Wl,O1 Wl,sortcommon Wl,asneeded Wl,z,relro,z,now specs=/usr/lib/rpm/redhat/redhathardenedcc1 fstackprotectorstrong Wformat Werror=formatsecurity Wdatetime D_FORTIFY_SOURCE=2 g Wall Wextra pedantic std=gnu99 o wav_reader wav_reader.c lsndfile lm lpthread lz lrt lresolv ldl Wl,rpath,/usr/local/lib L/usr/local/lib I/usr/local/include/libsndfile1 Wl,R/usr/local/lib Wl,enablenewdtags Wl,O1 Wl,sortcommon Wl,asneeded Wl,z,relro,z,now specs=/usr/lib/rpm/redhat/redhathardenedcc1 fstackprotectorstrong Wformat Werror=formatsecurity Wdatetime D_FORTIFY_SOURCE=2 g Wall Wextra pedantic std=gnu99 && chmod +x wav_reader && ls la wav_reader && echo "Now run the program with a WAV file as argument:" && echo "Example: $PWD/wav_reader test.wav" && echo "" && echo "The program will print the file format and other information." && echo "" && echo "For more information about libsndfile, visit https://www.meganerd.com/libsndfile/" && echo "" && echo "Enjoy!" && echo "" && echo "If you encounter any issues, please report them at https://github.com/libsndfile/libsndfile/issues" && echo "" && echo "Thank you for using libsndfile!" && echo "" && echo "Goodbye!" && echo "" && echo "Bye!" && echo "" && echo "Bye bye!" && echo "" && echo "Bye bye bye!" && echo "" && echo "Bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye bye bye bye bye bye!" && echo "" && echo "Bye bye bye bye bye bye bye by
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