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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Audio Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_audio.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_audio_entity_control_get PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function obtains the static values for a single audio control */
/* control on either the master channel or a specific channel. */
/* */
/* Note only control value of BYTE, WORD and DWORD (<4) is supported. */
/* E.g., Graphic Equalizer Control is not supported. */
/* */
/* INPUT */
/* */
/* audio Pointer to audio class */
/* audio_control Pointer to audio control */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_verify Verify instance is valid */
/* _ux_host_stack_transfer_request Process transfer request */
/* _ux_host_semaphore_get Get semaphore */
/* _ux_host_semaphore_put Release semaphore */
/* _ux_host_mutex_on Get mutex */
/* _ux_host_mutex_off Release mutex */
/* _ux_utility_memory_allocate Allocate memory block */
/* _ux_utility_memory_free Release memory block */
/* _ux_utility_short_get Read 16-bit value */
/* */
/* CALLED BY */
/* */
/* Application */
/* Audio Class */
/* */
/**************************************************************************/
UINT _ux_host_class_audio_entity_control_get(UX_HOST_CLASS_AUDIO *audio, UX_HOST_CLASS_AUDIO_CONTROL *audio_control)
{
UINT status;
UCHAR * control_buffer;
ULONG actual_size;
#if defined(UX_HOST_CLASS_AUDIO_2_SUPPORT)
ULONG n_subs, sub, pos, min, max, res, size;
#endif
/* Validate control size. */
if (audio_control -> ux_host_class_audio_control_size > 4)
return(UX_INVALID_PARAMETER);
/* Ensure the instance is valid. */
if (_ux_host_stack_class_instance_verify(_ux_system_host_class_audio_name, (VOID *) audio) != UX_SUCCESS)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_INSTANCE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, audio, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
}
/* Protect thread reentry to this instance. */
_ux_host_mutex_on(&audio -> ux_host_class_audio_mutex);
#if defined(UX_HOST_CLASS_AUDIO_2_SUPPORT)
if (_ux_host_class_audio_protocol_get(audio) == UX_HOST_CLASS_AUDIO_PROTOCOL_IP_VERSION_02_00)
{
/* Need to allocate enough memory for the control buffer. */
/* Max RANGE size (single item): 2+4*3=14. */
control_buffer = _ux_utility_memory_allocate(UX_SAFE_ALIGN, UX_CACHE_SAFE_MEMORY, 16);
if (control_buffer == UX_NULL)
{
/* Return an error. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
return(UX_MEMORY_INSUFFICIENT);
}
/* Issue GET RANGE request. */
status = _ux_host_class_audio_control_request(audio, 0,
UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE,
UX_CLASS_AUDIO20_RANGE,
audio_control -> ux_host_class_audio_control_channel |
(audio_control -> ux_host_class_audio_control << 8),
audio_control -> ux_host_class_audio_control_entity,
control_buffer, 16, &actual_size);
/* Check request status code. */
if (status == UX_SUCCESS)
{
/* Check returned size. */
if (actual_size < 2)
{
/* Return an error. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
_ux_utility_memory_free(control_buffer);
return(UX_TRANSFER_ERROR);
}
/* Check wNumSubRanges. */
n_subs = _ux_utility_short_get(control_buffer);
if (n_subs > 1)
{
/* wNumSubRanges is short, control size max 4, no overflow. */
size = 2 + n_subs * audio_control -> ux_host_class_audio_control_size;
if (size > 16)
{
/* Issue GET RANGE again with larger buffer. */
_ux_utility_memory_free(control_buffer);
control_buffer = _ux_utility_memory_allocate(UX_NO_ALIGN, UX_CACHE_SAFE_MEMORY, size);
if (control_buffer == UX_NULL)
{
/* Return an error. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
return(UX_MEMORY_INSUFFICIENT);
}
/* Issue GET RANGE request. */
status = _ux_host_class_audio_control_request(audio, 0,
UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE,
UX_CLASS_AUDIO20_RANGE,
audio_control -> ux_host_class_audio_control_channel |
(audio_control -> ux_host_class_audio_control << 8),
audio_control -> ux_host_class_audio_control_entity,
control_buffer, size, &actual_size);
if ((status != UX_SUCCESS) || (actual_size != size))
{
/* Return an error. */
_ux_utility_memory_free(control_buffer);
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
return(UX_TRANSFER_ERROR);
}
}
}
/* Parse returned values. */
audio_control -> ux_host_class_audio_control_max = 0;
audio_control -> ux_host_class_audio_control_min = 0xFFFFFFFF;
audio_control -> ux_host_class_audio_control_res = 0;
pos = 2;
for (sub = 0; sub < n_subs; sub ++)
{
/* Get MIN, MAX and POS. */
switch(audio_control -> ux_host_class_audio_control_size)
{
case 1:
min = *(control_buffer + pos);
pos ++;
max = *(control_buffer + pos);
pos ++;
res = *(control_buffer + pos);
pos ++;
break;
case 2:
min = _ux_utility_short_get(control_buffer + pos);
pos += 2;
max = _ux_utility_short_get(control_buffer + pos);
pos += 2;
res = _ux_utility_short_get(control_buffer + pos);
pos += 2;
break;
default:
min = _ux_utility_long_get(control_buffer + pos);
pos += 4;
max = _ux_utility_long_get(control_buffer + pos);
pos += 4;
res = _ux_utility_long_get(control_buffer + pos);
pos += 4;
break;
}
/* Keep MAX. */
if (audio_control -> ux_host_class_audio_control_max < max)
audio_control -> ux_host_class_audio_control_max = max;
/* Keep MIN. */
if (audio_control -> ux_host_class_audio_control_min > min)
audio_control -> ux_host_class_audio_control_min = min;
/* If there is RES, keep the min of RES. */
if (audio_control -> ux_host_class_audio_control_res == 0)
audio_control -> ux_host_class_audio_control_res = res;
else if (res < audio_control -> ux_host_class_audio_control_res)
audio_control -> ux_host_class_audio_control_res = res;
}
/* If there is list of RANGEs and no RES, guess it (average of max-min). */
if (n_subs > 1 && audio_control -> ux_host_class_audio_control_res == 0)
{
audio_control -> ux_host_class_audio_control_res =
(audio_control -> ux_host_class_audio_control_max -
audio_control -> ux_host_class_audio_control_min) / n_subs;
}
}
}
else
#endif
{
/* Need to allocate memory for the control buffer, max DWORD (4). */
control_buffer = _ux_utility_memory_allocate(UX_SAFE_ALIGN, UX_CACHE_SAFE_MEMORY, 4);
if (control_buffer == UX_NULL)
{
/* Return an error. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
return(UX_MEMORY_INSUFFICIENT);
}
/* Issue GET_MIN request. */
* (ULONG *)control_buffer = 0;
status = _ux_host_class_audio_control_request(audio, 0,
UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE,
UX_HOST_CLASS_AUDIO_GET_MIN,
audio_control -> ux_host_class_audio_control_channel |
(audio_control -> ux_host_class_audio_control << 8),
audio_control -> ux_host_class_audio_control_entity,
control_buffer, 4, &actual_size);
/* Check for correct transfer and entire control buffer returned.
* Start GET_MAX request. */
if (status == UX_SUCCESS)
{
/* Update the MIN static value for the caller. */
audio_control -> ux_host_class_audio_control_min = _ux_utility_long_get(control_buffer);
/* Issue GET_MAX request. */
* (ULONG *)control_buffer = 0;
status = _ux_host_class_audio_control_request(audio, 0,
UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE,
UX_HOST_CLASS_AUDIO_GET_MAX,
audio_control -> ux_host_class_audio_control_channel |
(audio_control -> ux_host_class_audio_control << 8),
audio_control -> ux_host_class_audio_control_entity,
control_buffer, 4, &actual_size);
}
/* Check for correct transfer and entire control buffer returned.
* Start GET_RES request. */
if (status == UX_SUCCESS)
{
/* Update the MAX static value for the caller. */
audio_control -> ux_host_class_audio_control_max = _ux_utility_long_get(control_buffer);
/* Issue GET_RES request. */
* (ULONG *)control_buffer = 0;
status = _ux_host_class_audio_control_request(audio, 0,
UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE,
UX_HOST_CLASS_AUDIO_GET_RES,
audio_control -> ux_host_class_audio_control_channel |
(audio_control -> ux_host_class_audio_control << 8),
audio_control -> ux_host_class_audio_control_entity,
control_buffer, 4, &actual_size);
}
/* Check for correct transfer and entire control buffer returned. */
if (status == UX_SUCCESS)
{
/* Update the RES static value for the caller. */
audio_control -> ux_host_class_audio_control_res = _ux_utility_long_get(control_buffer);
}
}
/* Free all used resources. */
_ux_utility_memory_free(control_buffer);
/* Unprotect thread reentry to this instance. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
/* Return completion status. */
return(status);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _uxe_host_class_audio_entity_control_get PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks errors in audio entity control get function */
/* call. */
/* */
/* INPUT */
/* */
/* audio Pointer to audio class */
/* audio_control Pointer to audio control */
/* */
/* OUTPUT */
/* */
/* Status */
/* */
/* CALLS */
/* */
/* _uxe_host_class_audio_entity_control_get */
/* Get audio entity control */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _uxe_host_class_audio_entity_control_get(UX_HOST_CLASS_AUDIO *audio, UX_HOST_CLASS_AUDIO_CONTROL *audio_control)
{
/* Sanity checks. */
if ((audio == UX_NULL) || (audio_control == UX_NULL))
return(UX_INVALID_PARAMETER);
/* Invoke entity control get function. */
return(_ux_host_class_audio_entity_control_get(audio, audio_control));
}
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