#include <freerdp/config.h>
#include <winpr/assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <freerdp/types.h>
#include <freerdp/log.h>
#include <freerdp/codec/dsp.h>
#include "dsp.h"

Macros
#define	TAG FREERDP_TAG("dsp")

Functions
static INT16	read_int16 (const BYTE *WINPR_RESTRICT src)

static BOOL	freerdp_dsp_channel_mix (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const BYTE WINPR_RESTRICT src, size_t size, const AUDIO_FORMAT WINPR_RESTRICT srcFormat, const BYTE WINPR_RESTRICT data, size_t WINPR_RESTRICT length)

static BOOL	freerdp_dsp_resample (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const BYTE WINPR_RESTRICT src, size_t size, const AUDIO_FORMAT WINPR_RESTRICT srcFormat, const BYTE WINPR_RESTRICT data, size_t WINPR_RESTRICT length)

static UINT16	dsp_decode_ima_adpcm_sample (ADPCM *WINPR_RESTRICT adpcm, unsigned int channel, BYTE sample)

static BOOL	freerdp_dsp_decode_ima_adpcm (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const BYTE WINPR_RESTRICT src, size_t size, wStream *WINPR_RESTRICT out)

static BYTE	dsp_encode_ima_adpcm_sample (ADPCM *WINPR_RESTRICT adpcm, int channel, INT16 sample)

static BOOL	freerdp_dsp_encode_ima_adpcm (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const BYTE WINPR_RESTRICT src, size_t size, wStream *WINPR_RESTRICT out)

static INLINE INT16	freerdp_dsp_decode_ms_adpcm_sample (ADPCM *WINPR_RESTRICT adpcm, BYTE sample, int channel)

static BOOL	freerdp_dsp_decode_ms_adpcm (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const BYTE WINPR_RESTRICT src, size_t size, wStream *WINPR_RESTRICT out)

static BYTE	freerdp_dsp_encode_ms_adpcm_sample (ADPCM *WINPR_RESTRICT adpcm, INT32 sample, int channel)

static BOOL	freerdp_dsp_encode_ms_adpcm (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const BYTE WINPR_RESTRICT src, size_t size, wStream *WINPR_RESTRICT out)

FREERDP_DSP_CONTEXT *	freerdp_dsp_context_new (BOOL encoder)

void	freerdp_dsp_context_free (FREERDP_DSP_CONTEXT *context)

BOOL	freerdp_dsp_encode (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const AUDIO_FORMAT WINPR_RESTRICT srcFormat, const BYTE WINPR_RESTRICT data, size_t length, wStream WINPR_RESTRICT out)

BOOL	freerdp_dsp_decode (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const AUDIO_FORMAT WINPR_RESTRICT srcFormat, const BYTE WINPR_RESTRICT data, size_t length, wStream WINPR_RESTRICT out)

BOOL	freerdp_dsp_supports_format (const AUDIO_FORMAT *WINPR_RESTRICT format, BOOL encode)

BOOL	freerdp_dsp_context_reset (FREERDP_DSP_CONTEXT WINPR_RESTRICT context, const AUDIO_FORMAT WINPR_RESTRICT targetFormat, UINT32 FramesPerPacket)

BOOL	freerdp_dsp_common_context_init (FREERDP_DSP_COMMON_CONTEXT *context, BOOL encode)

void	freerdp_dsp_common_context_uninit (FREERDP_DSP_COMMON_CONTEXT *context)

Variables
static const INT16	ima_step_index_table []

static const INT16	ima_step_size_table []

struct {
BYTE byte_num

BYTE byte_shift

}	ima_stereo_encode_map []

static const INT32	ms_adpcm_adaptation_table []

static const INT32	ms_adpcm_coeffs1 [7] = { 256, 512, 0, 192, 240, 460, 392 }

static const INT32	ms_adpcm_coeffs2 [7] = { 0, -256, 0, 64, 0, -208, -232 }

Macro Definition Documentation

◆ TAG

#define TAG FREERDP_TAG("dsp")

FreeRDP: A Remote Desktop Protocol Implementation Digital Sound Processing

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Function Documentation

◆ dsp_decode_ima_adpcm_sample()

static UINT16 dsp_decode_ima_adpcm_sample	(	ADPCM *WINPR_RESTRICT	adpcm,
		unsigned int	channel,
		BYTE	sample
	)

static

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◆ dsp_encode_ima_adpcm_sample()

static BYTE dsp_encode_ima_adpcm_sample	(	ADPCM *WINPR_RESTRICT	adpcm,
		int	channel,
		INT16	sample
	)

static

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◆ freerdp_dsp_channel_mix()

static BOOL freerdp_dsp_channel_mix	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const BYTE *WINPR_RESTRICT	src,
		size_t	size,
		const AUDIO_FORMAT *WINPR_RESTRICT	srcFormat,
		const BYTE **WINPR_RESTRICT	data,
		size_t *WINPR_RESTRICT	length
	)

static

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◆ freerdp_dsp_common_context_init()

BOOL freerdp_dsp_common_context_init	(	FREERDP_DSP_COMMON_CONTEXT *	context,
		BOOL	encode
	)

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◆ freerdp_dsp_common_context_uninit()

void freerdp_dsp_common_context_uninit ( FREERDP_DSP_COMMON_CONTEXT * context )

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◆ freerdp_dsp_context_free()

void freerdp_dsp_context_free ( FREERDP_DSP_CONTEXT * context )

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◆ freerdp_dsp_context_new()

FREERDP_DSP_CONTEXT* freerdp_dsp_context_new ( BOOL encoder )

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◆ freerdp_dsp_context_reset()

BOOL freerdp_dsp_context_reset	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const AUDIO_FORMAT *WINPR_RESTRICT	targetFormat,
		UINT32	FramesPerPacket
	)

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◆ freerdp_dsp_decode()

BOOL freerdp_dsp_decode	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const AUDIO_FORMAT *WINPR_RESTRICT	srcFormat,
		const BYTE *WINPR_RESTRICT	data,
		size_t	length,
		wStream *WINPR_RESTRICT	out
	)

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◆ freerdp_dsp_decode_ima_adpcm()

static BOOL freerdp_dsp_decode_ima_adpcm	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const BYTE *WINPR_RESTRICT	src,
		size_t	size,
		wStream *WINPR_RESTRICT	out
	)

static

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◆ freerdp_dsp_decode_ms_adpcm()

static BOOL freerdp_dsp_decode_ms_adpcm	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const BYTE *WINPR_RESTRICT	src,
		size_t	size,
		wStream *WINPR_RESTRICT	out
	)

static

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◆ freerdp_dsp_decode_ms_adpcm_sample()

static INLINE INT16 freerdp_dsp_decode_ms_adpcm_sample	(	ADPCM *WINPR_RESTRICT	adpcm,
		BYTE	sample,
		int	channel
	)

static

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◆ freerdp_dsp_encode()

BOOL freerdp_dsp_encode	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const AUDIO_FORMAT *WINPR_RESTRICT	srcFormat,
		const BYTE *WINPR_RESTRICT	data,
		size_t	length,
		wStream *WINPR_RESTRICT	out
	)

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◆ freerdp_dsp_encode_ima_adpcm()

static BOOL freerdp_dsp_encode_ima_adpcm	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const BYTE *WINPR_RESTRICT	src,
		size_t	size,
		wStream *WINPR_RESTRICT	out
	)

static

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◆ freerdp_dsp_encode_ms_adpcm()

static BOOL freerdp_dsp_encode_ms_adpcm	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const BYTE *WINPR_RESTRICT	src,
		size_t	size,
		wStream *WINPR_RESTRICT	out
	)

static

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◆ freerdp_dsp_encode_ms_adpcm_sample()

static BYTE freerdp_dsp_encode_ms_adpcm_sample	(	ADPCM *WINPR_RESTRICT	adpcm,
		INT32	sample,
		int	channel
	)

static

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◆ freerdp_dsp_resample()

static BOOL freerdp_dsp_resample	(	FREERDP_DSP_CONTEXT *WINPR_RESTRICT	context,
		const BYTE *WINPR_RESTRICT	src,
		size_t	size,
		const AUDIO_FORMAT *WINPR_RESTRICT	srcFormat,
		const BYTE **WINPR_RESTRICT	data,
		size_t *WINPR_RESTRICT	length
	)

static

Microsoft Multimedia Standards Update http://download.microsoft.com/download/9/8/6/9863C72A-A3AA-4DDB-B1BA-CA8D17EFD2D4/RIFFNEW.pdf

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◆ freerdp_dsp_supports_format()

BOOL freerdp_dsp_supports_format	(	const AUDIO_FORMAT *WINPR_RESTRICT	format,
		BOOL	encode
	)

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◆ read_int16()

static INT16 read_int16 ( const BYTE *WINPR_RESTRICT src )

static

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Variable Documentation

◆ byte_num

BYTE byte_num

◆ byte_shift

BYTE byte_shift

◆ ima_step_index_table

const INT16 ima_step_index_table[]

static

Initial value:

= {
        -1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8
}

Microsoft IMA ADPCM specification:

http://wiki.multimedia.cx/index.php?title=Microsoft_IMA_ADPCM http://wiki.multimedia.cx/index.php?title=IMA_ADPCM

◆ ima_step_size_table

const INT16 ima_step_size_table[]

static

Initial value:

= {
        7,     8,     9,     10,    11,    12,    13,    14,    16,    17,    19,   21,    23,
        25,    28,    31,    34,    37,    41,    45,    50,    55,    60,    66,   73,    80,
        88,    97,    107,   118,   130,   143,   157,   173,   190,   209,   230,  253,   279,
        307,   337,   371,   408,   449,   494,   544,   598,   658,   724,   796,  876,   963,
        1060,  1166,  1282,  1411,  1552,  1707,  1878,  2066,  2272,  2499,  2749, 3024,  3327,
        3660,  4026,  4428,  4871,  5358,  5894,  6484,  7132,  7845,  8630,  9493, 10442, 11487,
        12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
}

◆

const { ... } ima_stereo_encode_map[]

Initial value:

= { { 0, 0 }, { 4, 0 }, { 0, 4 }, { 4, 4 }, { 1, 0 }, { 5, 0 },
                                  { 1, 4 }, { 5, 4 }, { 2, 0 }, { 6, 0 }, { 2, 4 }, { 6, 4 },
                                  { 3, 0 }, { 7, 0 }, { 3, 4 }, { 7, 4 } }

0 1 2 3 2 0 6 4 10 8 14 12 <left>

4 5 6 7 3 1 7 5 11 9 15 13 <right>

◆ ms_adpcm_adaptation_table

const INT32 ms_adpcm_adaptation_table[]

static

Initial value:

= { 230, 230, 230, 230, 307, 409, 512, 614,

768, 614, 512, 409, 307, 230, 230, 230 }

Microsoft ADPCM Specification:

http://wiki.multimedia.cx/index.php?title=Microsoft_ADPCM

◆ ms_adpcm_coeffs1

const INT32 ms_adpcm_coeffs1[7] = { 256, 512, 0, 192, 240, 460, 392 }

static

◆ ms_adpcm_coeffs2

const INT32 ms_adpcm_coeffs2[7] = { 0, -256, 0, 64, 0, -208, -232 }

static

Macros

Functions

Variables

Macro Definition Documentation

◆ TAG

Function Documentation

◆ dsp_decode_ima_adpcm_sample()

◆ dsp_encode_ima_adpcm_sample()

◆ freerdp_dsp_channel_mix()

◆ freerdp_dsp_common_context_init()

◆ freerdp_dsp_common_context_uninit()

◆ freerdp_dsp_context_free()

◆ freerdp_dsp_context_new()

◆ freerdp_dsp_context_reset()

◆ freerdp_dsp_decode()

◆ freerdp_dsp_decode_ima_adpcm()

◆ freerdp_dsp_decode_ms_adpcm()

◆ freerdp_dsp_decode_ms_adpcm_sample()

◆ freerdp_dsp_encode()

◆ freerdp_dsp_encode_ima_adpcm()

◆ freerdp_dsp_encode_ms_adpcm()

◆ freerdp_dsp_encode_ms_adpcm_sample()

◆ freerdp_dsp_resample()

◆ freerdp_dsp_supports_format()

◆ read_int16()

Variable Documentation

◆ byte_num

◆ byte_shift

◆ ima_step_index_table

◆ ima_step_size_table

◆

◆ ms_adpcm_adaptation_table

◆ ms_adpcm_coeffs1

◆ ms_adpcm_coeffs2