Audio Formats & Channel Routing

Channel map parsing, stream conversion, and audio sample saturation routines. More...

Files
file	channel_map.h
	Audio stream channel map lookup and sizing helpers.
file	format_generic.h
	Generic audio sample saturation helpers.

Functions
static uint32_t	chmap_get_size (struct sof_ipc_channel_map *chmap)
	Returns the size of an IPC channel map structure in bytes.
struct sof_ipc_channel_map *	chmap_get (struct sof_ipc_stream_map *smap, int index)
	Returns a channel map for a given channel index in a stream map.
static int32_t	sat_int32 (int64_t x)
	Saturate a 64-bit integer to signed 32-bit integer range.
static int32_t	sat_int24 (int32_t x)
	Saturate a 32-bit integer to signed 24-bit integer range.
static int16_t	sat_int16 (int32_t x)
	Saturate a 32-bit integer to signed 16-bit integer range.
static int8_t	sat_int8 (int32_t x)
	Saturate a 32-bit integer to signed 8-bit integer range.

Detailed Description

Channel map parsing, stream conversion, and audio sample saturation routines.

Function Documentation

chmap_get()

struct sof_ipc_channel_map * chmap_get	(	struct sof_ipc_stream_map *	smap,
		int	index
	)

Returns a channel map for a given channel index in a stream map.

Parameters

[in]	smap	Pointer to the stream map structure.
[in]	index	Channel index.

Returns

Pointer to matching channel map structure, or NULL if not found.

chmap_get_size()

static uint32_t chmap_get_size ( struct sof_ipc_channel_map *  chmap )

inlinestatic

Returns the size of an IPC channel map structure in bytes.

Parameters

[in]

chmap

Pointer to the channel map structure.

Returns

Total size in bytes including dynamic channel coefficients.

sat_int16()

static int16_t sat_int16 ( int32_t  x )

inlinestatic

Saturate a 32-bit integer to signed 16-bit integer range.

Parameters

[in]

x

Input 32-bit integer.

Returns

Saturated 16-bit integer clamped between INT16_MIN and INT16_MAX.

sat_int24()

static int32_t sat_int24 ( int32_t  x )

inlinestatic

Saturate a 32-bit integer to signed 24-bit integer range.

Parameters

[in]

x

Input 32-bit integer.

Returns

Saturated 24-bit integer clamped between INT24_MINVALUE and INT24_MAXVALUE.

sat_int32()

static int32_t sat_int32 ( int64_t  x )

inlinestatic

Saturate a 64-bit integer to signed 32-bit integer range.

Parameters

[in]

x

Input 64-bit integer.

Returns

Saturated 32-bit integer clamped between INT32_MIN and INT32_MAX.

sat_int8()

static int8_t sat_int8 ( int32_t  x )

inlinestatic

Saturate a 32-bit integer to signed 8-bit integer range.

Parameters

[in]

x

Input 32-bit integer.

Returns

Saturated 8-bit integer clamped between INT8_MIN and INT8_MAX.