Waveform format. More...

Public Types
enum class	compression_t : uint16_t { unknown = 0x0000 , pcm = 0x0001 , microsoft_adpcm = 0x0002 , pcm_float = 0x0003 , itu_g711_a_law = 0x0006 , itu_g711_mu_law = 0x0007 , ima_adpcm = 0x0011 , itu_g_723_adpcm = 0x0016 , gsm_6_10 = 0x0031 , itu_g_721_adpcm = 0x0040 , mpeg = 0x0050 , experimental = 0xffff }

using	record = stdex::idrec::record<format, id_t, 0x20746D66 , length_t, align>

Public Attributes
enum stdex::wav::format::compression_t	compression = compression_t::unknown
	Waveform compression.

uint16_t	num_channels = 0
	The number of channels specifies how many separate audio signals that are encoded in the wave data chunk (1 - mono, 2 - stereo)

uint32_t	sample_rate = 0
	The number of sample slices per second (Hz). This value is unaffected by the number of channels.

uint32_t	bytes_per_second = 0
	How many bytes of wave data must be streamed to a D/A converter per second in order to play the wave file. This information is useful when determining if data can be streamed from the source fast enough to keep up with playback. This value can be easily calculated with the formula: `sample_rate * block_align`

uint16_t	block_align = 0
	The number of bytes per sample slice (all channels). This value is not affected by the number of channels and can be calculated with the formula: `bits_per_channel / 8 * num_channels`

uint16_t	bits_per_channel = 0
	The number of bits used to define each sample. This value is usually 8, 16, 24 or 32. If the number of bits is not byte aligned (a multiple of 8) then the number of bytes used per sample is rounded up to the nearest byte size and the unused bytes are set to 0 and ignored.

stdex::stream::memory_file	extra
	Additional format data.

Friends
stdex::stream::basic &	operator<< (stdex::stream::basic &dat, const format &data)

stdex::stream::basic &	operator>> (stdex::stream::basic &dat, format &data)

Detailed Description

Waveform format.

Member Enumeration Documentation

strong

Enumerator
unknown	Unknown.
pcm	PCM/uncompressed integral.
microsoft_adpcm	Microsoft ADPCM.
pcm_float	PCM/uncompressed floating point.
itu_g711_a_law	ITU G.711 a-law.
itu_g711_mu_law	ITU G.711 µ-law.
ima_adpcm	IMA ADPCM.
itu_g_723_adpcm	ITU G.723 ADPCM (Yamaha)
gsm_6_10	GSM 6.10.
itu_g_721_adpcm	ITU G.721 ADPCM.
mpeg	MPEG.
experimental	Experimental.

The documentation for this struct was generated from the following file: