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Completed control and mixer API

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This commit is contained in:
Abramo Bagnara 2001-02-09 11:20:31 +00:00
parent c709b0a627
commit fea0c73cdb
23 changed files with 1988 additions and 1251 deletions
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92
src/control/control_hw.c
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@ -23,11 +23,16 @@
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "control_local.h"
#ifndef F_SETSIG
#define F_SETSIG 10
#endif
#define SNDRV_FILE_CONTROL "/dev/snd/controlC%i"
#define SNDRV_CTL_VERSION_MAX SNDRV_PROTOCOL_VERSION(2, 0, 0)
@ -45,6 +50,61 @@ static int snd_ctl_hw_close(snd_ctl_t *handle)
return res;
}
static int snd_ctl_hw_nonblock(snd_ctl_t *handle, int nonblock)
{
snd_ctl_hw_t *hw = handle->private;
long flags;
int fd = hw->fd;
if ((flags = fcntl(fd, F_GETFL)) < 0) {
SYSERR("F_GETFL failed");
return -errno;
}
if (nonblock)
flags |= O_NONBLOCK;
else
flags &= ~O_NONBLOCK;
if (fcntl(fd, F_SETFL, flags) < 0) {
SYSERR("F_SETFL for O_NONBLOCK failed");
return -errno;
}
return 0;
}
static int snd_ctl_hw_async(snd_ctl_t *ctl, int sig, pid_t pid)
{
long flags;
snd_ctl_hw_t *hw = ctl->private;
int fd = hw->fd;
if ((flags = fcntl(fd, F_GETFL)) < 0) {
SYSERR("F_GETFL failed");
return -errno;
}
if (sig >= 0)
flags |= O_ASYNC;
else
flags &= ~O_ASYNC;
if (fcntl(fd, F_SETFL, flags) < 0) {
SYSERR("F_SETFL for O_ASYNC failed");
return -errno;
}
if (sig < 0)
return 0;
if (sig == 0)
sig = SIGIO;
if (fcntl(fd, F_SETSIG, sig) < 0) {
SYSERR("F_SETSIG failed");
return -errno;
}
if (pid == 0)
pid = getpid();
if (fcntl(fd, F_SETOWN, pid) < 0) {
SYSERR("F_SETOWN failed");
return -errno;
}
return 0;
}
static int snd_ctl_hw_poll_descriptor(snd_ctl_t *handle)
{
snd_ctl_hw_t *hw = handle->private;
@ -59,34 +119,34 @@ static int snd_ctl_hw_hw_info(snd_ctl_t *handle, snd_ctl_card_info_t *info)
return 0;
}
static int snd_ctl_hw_clist(snd_ctl_t *handle, snd_ctl_element_list_t *list)
static int snd_ctl_hw_elem_list(snd_ctl_t *handle, snd_ctl_elem_list_t *list)
{
snd_ctl_hw_t *hw = handle->private;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEMENT_LIST, list) < 0)
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_LIST, list) < 0)
return -errno;
return 0;
}
static int snd_ctl_hw_cinfo(snd_ctl_t *handle, snd_ctl_element_info_t *info)
static int snd_ctl_hw_elem_info(snd_ctl_t *handle, snd_ctl_elem_info_t *info)
{
snd_ctl_hw_t *hw = handle->private;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEMENT_INFO, info) < 0)
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_INFO, info) < 0)
return -errno;
return 0;
}
static int snd_ctl_hw_cread(snd_ctl_t *handle, snd_ctl_element_t *control)
static int snd_ctl_hw_elem_read(snd_ctl_t *handle, snd_ctl_elem_t *control)
{
snd_ctl_hw_t *hw = handle->private;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEMENT_READ, control) < 0)
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_READ, control) < 0)
return -errno;
return 0;
}
static int snd_ctl_hw_cwrite(snd_ctl_t *handle, snd_ctl_element_t *control)
static int snd_ctl_hw_elem_write(snd_ctl_t *handle, snd_ctl_elem_t *control)
{
snd_ctl_hw_t *hw = handle->private;
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEMENT_WRITE, control) < 0)
if (ioctl(hw->fd, SNDRV_CTL_IOCTL_ELEM_WRITE, control) < 0)
return -errno;
return 0;
}
@ -158,17 +218,23 @@ static int snd_ctl_hw_rawmidi_prefer_subdevice(snd_ctl_t *handle, int subdev)
static int snd_ctl_hw_read(snd_ctl_t *handle, snd_ctl_event_t *event)
{
snd_ctl_hw_t *hw = handle->private;
return read(hw->fd, event, sizeof(*event));
ssize_t res = read(hw->fd, event, sizeof(*event));
if (res <= 0)
return res;
assert(res == sizeof(*event));
return 1;
}
snd_ctl_ops_t snd_ctl_hw_ops = {
close: snd_ctl_hw_close,
nonblock: snd_ctl_hw_nonblock,
async: snd_ctl_hw_async,
poll_descriptor: snd_ctl_hw_poll_descriptor,
hw_info: snd_ctl_hw_hw_info,
clist: snd_ctl_hw_clist,
cinfo: snd_ctl_hw_cinfo,
cread: snd_ctl_hw_cread,
cwrite: snd_ctl_hw_cwrite,
element_list: snd_ctl_hw_elem_list,
element_info: snd_ctl_hw_elem_info,
element_read: snd_ctl_hw_elem_read,
element_write: snd_ctl_hw_elem_write,
hwdep_next_device: snd_ctl_hw_hwdep_next_device,
hwdep_info: snd_ctl_hw_hwdep_info,
pcm_next_device: snd_ctl_hw_pcm_next_device,