Name

wavfile - dynamically parse and fill different formats of wav headers, such as 44 bytes, 46 bytes, 98 bytes, etc.

Description

This repository provides a set of apis for reading and writing wav header, and also provides three examples to show the application of these apis:

• wav2pcm: convert wav file to pcm file, remove wav header;
• pcm2wav: convert pcm file to wav file, fill 44 bytes's wav header;
• wavinfo: dynamically parse wav header of input;

Compile

$ make clean all

Usage

$ ./wav2pcm xxx.wav xxx.pcm
$ ./pcm2wav xxx.pcm xxx.wav channels bits samplerate
$ ./wavinfo xxx.wav

Methods

wavfile_read_open

Syntax

FILE *wavfile_read_open(const char *filename, unsigned int *size);

Synopsis

open wav file to read.

Params

• filename : wav file path to read;
• size: return pcm data size of wav file;

Return value:

• Success : wav file descriptor, skip this wav header;
• Failed : NULL;

---

wavfile_read

Syntax

int wavfile_read(FILE *fp, void *data, size_t size);

Synopsis

read pcm data from wav file.

Params

• fp : wav file descriptor to read;
• data : pcm data to read;
• size: pcm data size to read;

Return value:

• Success : number of bytes read;
• Failed : 0 or less than 0;

---

wavfile_read_close

Syntax

int wavfile_read_close(FILE *fp);

Synopsis

close wav file.

Params

• fp : wav file descriptor;

Return value:

• Success : 0;
• Failed : -1;

---

wavfile_write_open

Syntax

FILE *wavfile_write_open(const char *filename);

Synopsis

open wav file to write.

Params

• filename : wav file path to write;

Return value:

• Success : wav file descriptor, skip 44 bytes of header.;
• Failed : NULL;

---

wavfile_write

Syntax

int wavfile_write(FILE *fp, void *data, size_t size);

Synopsis

write pcm data to wav file.

Params

• fp : wav file descriptor to write;
• data : pcm data to write;
• size: pcm data size to write;

Return value:

• Success : number of bytes written;
• Failed : 0 or less than the size written;

---

wavfile_write_close

Syntax

int wavfile_write_close(FILE *fp, int channels, int bits, int samplerate);

Synopsis

close wav file.

Params

• fp : wav file descriptor;
• channels : channels of wav file;
• bits : bits of wav file;
• samplerate : samplerate of wav file;

Return value:

• Success : 0;
• Failed : -1;

---

wavfile_info

Syntax

int wavfile_info(FILE *fp, wavfile_header_t *header);

Synopsis

get wav header info in struct wavfile_header_t.

Params

• fp : wav file descriptor;
• header : struct wavfile_header_t for saving wav header info;

Return value:

• Success : 0;
• Failed : -1;