/*
* Copyright (c) 2011 Jan Vesely
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libdrv
* @{
*/
/** @file
*/
#include <async.h>
#include <errno.h>
#include <assert.h>
#include <str.h>
#include <macros.h>
#include "audio_mixer_iface.h"
#include "ddf/driver.h"
typedef enum {
/** Asks for basic mixer info: Mixer name and number of controllable
* items.
* Answer:
* - ENOTSUP - call not supported
* - EOK - call successful, info is valid
* Answer arguments:
* - Mixer name
* - Number of controllable items
*/
IPC_M_AUDIO_MIXER_GET_INFO,
/** Asks for item mixer info: Item name and number of controllable
* channels.
* Answer:
* - ENOTSUP - call not supported
* - ENOENT - no such item
* - EOK - call successful, info is valid
* Answer arguments:
* - Item name
* - Number of controllable channels
*/
IPC_M_AUDIO_MIXER_GET_ITEM_INFO,
/** Set new control item setting
* Answer:
* - ENOTSUP - call not supported
* - ENOENT - no such control item
* - EOK - call successful, info is valid
*/
IPC_M_AUDIO_MIXER_SET_ITEM_LEVEL,
/** Get control item setting
* Answer:
* - ENOTSUP - call not supported
* - ENOENT - no such control item
* - EOK - call successful, info is valid
*/
IPC_M_AUDIO_MIXER_GET_ITEM_LEVEL,
} audio_mixer_iface_funcs_t;
/*
* CLIENT SIDE
*/
/**
* Query audio mixer for basic info (name and items count).
* @param[in] exch IPC exchange connected to the device
* @param[out] name Audio mixer string identifier
* @param[out] items Number of items controlled by the mixer.
* @return Error code.
*/
errno_t audio_mixer_get_info(async_exch_t *exch, char **name, unsigned *items)
{
if (!exch)
return EINVAL;
sysarg_t name_size, itemc;
const errno_t ret = async_req_1_2(exch, DEV_IFACE_ID(AUDIO_MIXER_IFACE),
IPC_M_AUDIO_MIXER_GET_INFO, &name_size, &itemc);
if (ret == EOK && name) {
char *name_place = calloc(1, name_size);
if (!name_place) {
/*
* Make the other side fail
* as it waits for read request
*/
async_data_read_start(exch, (void *)-1, 0);
return ENOMEM;
}
const errno_t ret =
async_data_read_start(exch, name_place, name_size);
if (ret != EOK) {
free(name_place);
return ret;
}
*name = name_place;
}
if (ret == EOK && items)
*items = itemc;
return ret;
}
/**
* Query audio mixer for item specific info (name and channels count).
* @param[in] exch IPC exchange connected to the device
* @param[in] item The control item
* @param[out] name Control item string identifier.
* @param[out] channles Number of channels associated with this control item.
* @return Error code.
*/
errno_t audio_mixer_get_item_info(async_exch_t *exch, unsigned item,
char **name, unsigned *levels)
{
if (!exch)
return EINVAL;
sysarg_t name_size, lvls;
const errno_t ret = async_req_2_2(exch, DEV_IFACE_ID(AUDIO_MIXER_IFACE),
IPC_M_AUDIO_MIXER_GET_ITEM_INFO, item, &name_size, &lvls);
if (ret == EOK && name) {
char *name_place = calloc(1, name_size);
if (!name_place) {
/*
* Make the other side fail
* as it waits for read request
*/
async_data_read_start(exch, (void *)-1, 0);
return ENOMEM;
}
const errno_t ret =
async_data_read_start(exch, name_place, name_size);
if (ret != EOK) {
free(name_place);
return ret;
}
*name = name_place;
}
if (ret == EOK && levels)
*levels = lvls;
return ret;
}
/**
* Set control item to a new level.
* @param[in] exch IPC exchange connected to the device.
* @param[in] item The control item controlling the channel.
* @param[in] level The new value.
* @return Error code.
*/
errno_t audio_mixer_set_item_level(async_exch_t *exch, unsigned item,
unsigned level)
{
if (!exch)
return EINVAL;
return async_req_3_0(exch, DEV_IFACE_ID(AUDIO_MIXER_IFACE),
IPC_M_AUDIO_MIXER_SET_ITEM_LEVEL, item, level);
}
/**
* Get current level of a control item.
* @param[in] exch IPC exchange connected to the device.
* @param[in] item The control item controlling the channel.
* @param[in] channel The channel index.
* @param[out] level Currently set value.
* @return Error code.
*/
errno_t audio_mixer_get_item_level(async_exch_t *exch, unsigned item,
unsigned *level)
{
if (!exch)
return EINVAL;
sysarg_t current;
const errno_t ret = async_req_2_1(exch, DEV_IFACE_ID(AUDIO_MIXER_IFACE),
IPC_M_AUDIO_MIXER_GET_ITEM_LEVEL, item, ¤t);
if (ret == EOK && level)
*level = current;
return ret;
}
/*
* SERVER SIDE
*/
static void remote_audio_mixer_get_info(ddf_fun_t *, void *, ipc_call_t *);
static void remote_audio_mixer_get_item_info(ddf_fun_t *, void *, ipc_call_t *);
static void remote_audio_mixer_get_item_level(ddf_fun_t *, void *, ipc_call_t *);
static void remote_audio_mixer_set_item_level(ddf_fun_t *, void *, ipc_call_t *);
/** Remote audio mixer interface operations. */
static const remote_iface_func_ptr_t remote_audio_mixer_iface_ops[] = {
[IPC_M_AUDIO_MIXER_GET_INFO] = remote_audio_mixer_get_info,
[IPC_M_AUDIO_MIXER_GET_ITEM_INFO] = remote_audio_mixer_get_item_info,
[IPC_M_AUDIO_MIXER_GET_ITEM_LEVEL] = remote_audio_mixer_get_item_level,
[IPC_M_AUDIO_MIXER_SET_ITEM_LEVEL] = remote_audio_mixer_set_item_level,
};
/** Remote audio mixer interface structure. */
const remote_iface_t remote_audio_mixer_iface = {
.method_count = ARRAY_SIZE(remote_audio_mixer_iface_ops),
.methods = remote_audio_mixer_iface_ops
};
void remote_audio_mixer_get_info(ddf_fun_t *fun, void *iface, ipc_call_t *icall)
{
audio_mixer_iface_t *mixer_iface = iface;
if (!mixer_iface->get_info) {
async_answer_0(icall, ENOTSUP);
return;
}
const char *name = NULL;
unsigned items = 0;
const errno_t ret = mixer_iface->get_info(fun, &name, &items);
const size_t name_size = name ? str_size(name) + 1 : 0;
async_answer_2(icall, ret, name_size, items);
/* Send the name. */
if (ret == EOK && name_size > 0) {
ipc_call_t call;
size_t size;
if (!async_data_read_receive(&call, &size)) {
async_answer_0(&call, EPARTY);
return;
}
if (size != name_size) {
async_answer_0(&call, ELIMIT);
return;
}
async_data_read_finalize(&call, name, name_size);
}
}
void remote_audio_mixer_get_item_info(ddf_fun_t *fun, void *iface,
ipc_call_t *icall)
{
audio_mixer_iface_t *mixer_iface = iface;
if (!mixer_iface->get_item_info) {
async_answer_0(icall, ENOTSUP);
return;
}
const unsigned item = DEV_IPC_GET_ARG1(*icall);
const char *name = NULL;
unsigned values = 0;
const errno_t ret = mixer_iface->get_item_info(fun, item, &name, &values);
const size_t name_size = name ? str_size(name) + 1 : 0;
async_answer_2(icall, ret, name_size, values);
/* Send the name. */
if (ret == EOK && name_size > 0) {
ipc_call_t call;
size_t size;
if (!async_data_read_receive(&call, &size)) {
async_answer_0(&call, EPARTY);
return;
}
if (size != name_size) {
async_answer_0(&call, ELIMIT);
return;
}
async_data_read_finalize(&call, name, name_size);
}
}
void remote_audio_mixer_set_item_level(ddf_fun_t *fun, void *iface,
ipc_call_t *icall)
{
audio_mixer_iface_t *mixer_iface = iface;
if (!mixer_iface->set_item_level) {
async_answer_0(icall, ENOTSUP);
return;
}
const unsigned item = DEV_IPC_GET_ARG1(*icall);
const unsigned value = DEV_IPC_GET_ARG2(*icall);
const errno_t ret = mixer_iface->set_item_level(fun, item, value);
async_answer_0(icall, ret);
}
void remote_audio_mixer_get_item_level(ddf_fun_t *fun, void *iface,
ipc_call_t *icall)
{
audio_mixer_iface_t *mixer_iface = iface;
if (!mixer_iface->get_item_level) {
async_answer_0(icall, ENOTSUP);
return;
}
const unsigned item = DEV_IPC_GET_ARG1(*icall);
unsigned current = 0;
const errno_t ret =
mixer_iface->get_item_level(fun, item, ¤t);
async_answer_1(icall, ret, current);
}
/**
* @}
*/