Group PJMEDIA_WAVE
- group PJMEDIA_WAVE
Representation of RIFF/WAVE file format.
This the the low level representation of RIFF/WAVE file format. For higher abstraction, please see WAV File Player and File Writer (Recorder).
Defines
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PJMEDIA_RIFF_TAG
Standard RIFF tag to identify RIFF file format in the WAVE header.
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PJMEDIA_WAVE_TAG
Standard WAVE tag to identify WAVE header.
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PJMEDIA_FMT_TAG
Standard FMT tag to identify format chunks.
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PJMEDIA_DATA_TAG
Standard DATA tag to identify data chunks.
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PJMEDIA_FACT_TAG
Standard FACT tag to identify fact chunks.
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PJMEDIA_WAVE_NORMALIZE_SUBCHUNK(ch)
Normalize subchunk header from little endian (the representation of RIFF file) into host’s endian.
Enums
Functions
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void pjmedia_wave_hdr_file_to_host(pjmedia_wave_hdr *hdr)
On big-endian hosts, this function swaps the byte order of the values in the WAVE header fields. On little-endian hosts, this function does nothing.
Application SHOULD call this function after reading the WAVE header chunks from a file.
- Parameters:
hdr – The WAVE header.
-
void pjmedia_wave_hdr_host_to_file(pjmedia_wave_hdr *hdr)
On big-endian hosts, this function swaps the byte order of the values in the WAVE header fields. On little-endian hosts, this function does nothing.
Application SHOULD call this function before writing the WAVE header to a file.
- Parameters:
hdr – The WAVE header.
-
struct pjmedia_wave_hdr
- #include <wave.h>
This file describes the simpler/canonical version of a WAVE file. It does not support the full RIFF format specification.
See also
Public Members
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pj_uint32_t riff
“RIFF” ASCII tag.
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pj_uint32_t file_len
File length minus 8 bytes
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pj_uint32_t wave
“WAVE” ASCII tag.
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struct pjmedia_wave_hdr::[anonymous] riff_hdr
This structure describes RIFF WAVE file header
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pj_uint32_t fmt
“fmt “ ASCII tag.
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pj_uint32_t len
16 for PCM.
Data length.
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pj_uint16_t fmt_tag
1 for PCM
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pj_uint16_t nchan
Number of channels.
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pj_uint32_t sample_rate
Sampling rate.
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pj_uint32_t bytes_per_sec
Average bytes per second.
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pj_uint16_t block_align
nchannels * bits / 8
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pj_uint16_t bits_per_sample
Bits per sample.
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struct pjmedia_wave_hdr::[anonymous] fmt_hdr
This structure describes format chunks/header
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pj_uint32_t data
“data” ASCII tag.
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struct pjmedia_wave_hdr::[anonymous] data_hdr
The data header preceeds the actual data in the file.
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pj_uint32_t riff
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struct pjmedia_wave_subchunk
- #include <wave.h>
This structure describes generic RIFF subchunk header.
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PJMEDIA_RIFF_TAG