mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-03 09:01:52 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Remove device, stream, subdevice selection and incorporated in info structs. Changed paranoia checks in assert

Browse source
This commit is contained in:
Abramo Bagnara 2000-06-21 15:00:24 +00:00
parent 60fa939c21
commit 79793b98c2
1 changed files with 32 additions and 110 deletions
Download patch file Download diff file Expand all files Collapse all files

142
src/control/control.c
View file

@ -26,6 +26,7 @@
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <assert.h>
#include "asoundlib.h"
#define SND_FILE_CONTROL "/dev/snd/controlC%i"
@ -44,8 +45,7 @@ int snd_ctl_open(snd_ctl_t **handle, int card)
*handle = NULL;
if (card < 0 || card >= SND_CARDS)
return -EINVAL;
assert(card >= 0 && card < SND_CARDS);
sprintf(filename, SND_FILE_CONTROL, card);
if ((fd = open(filename, O_RDWR)) < 0) {
snd_card_load(card);
@ -74,176 +74,98 @@ int snd_ctl_open(snd_ctl_t **handle, int card)
int snd_ctl_close(snd_ctl_t *handle)
{
snd_ctl_t *ctl;
int res;
ctl = handle;
if (!ctl)
return -EINVAL;
res = close(ctl->fd) < 0 ? -errno : 0;
free(ctl);
assert(handle);
res = close(handle->fd) < 0 ? -errno : 0;
free(handle);
return res;
}
int snd_ctl_file_descriptor(snd_ctl_t *handle)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl)
return -EINVAL;
return ctl->fd;
assert(handle);
return handle->fd;
}
int snd_ctl_hw_info(snd_ctl_t *handle, struct snd_ctl_hw_info *info)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !info)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_HW_INFO, info) < 0)
assert(handle && info);
if (ioctl(handle->fd, SND_CTL_IOCTL_HW_INFO, info) < 0)
return -errno;
return 0;
}
int snd_ctl_switch_list(snd_ctl_t *handle, snd_switch_list_t *list)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !list)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_SWITCH_LIST, list) < 0)
assert(handle && list);
if (ioctl(handle->fd, SND_CTL_IOCTL_SWITCH_LIST, list) < 0)
return -errno;
return 0;
}
int snd_ctl_switch_read(snd_ctl_t *handle, snd_switch_t *sw)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !sw || sw->name[0] == '\0')
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_SWITCH_READ, sw) < 0)
assert(handle && sw && sw->name[0]);
if (ioctl(handle->fd, SND_CTL_IOCTL_SWITCH_READ, sw) < 0)
return -errno;
return 0;
}
int snd_ctl_switch_write(snd_ctl_t *handle, snd_switch_t *sw)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !sw || sw->name[0] == '\0')
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_SWITCH_WRITE, sw) < 0)
assert(handle && sw && sw->name[0]);
if (ioctl(handle->fd, SND_CTL_IOCTL_SWITCH_WRITE, sw) < 0)
return -errno;
return 0;
}
int snd_ctl_hwdep_info(snd_ctl_t *handle, int dev, snd_hwdep_info_t * info)
int snd_ctl_hwdep_info(snd_ctl_t *handle, snd_hwdep_info_t * info)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !info || dev < 0)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_HWDEP_DEVICE, &dev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_HWDEP_INFO, info) < 0)
assert(handle && info);
if (ioctl(handle->fd, SND_CTL_IOCTL_HWDEP_INFO, info) < 0)
return -errno;
return 0;
}
int snd_ctl_pcm_info(snd_ctl_t *handle, int dev, snd_pcm_info_t * info)
int snd_ctl_pcm_info(snd_ctl_t *handle, snd_pcm_info_t * info)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !info || dev < 0)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_DEVICE, &dev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_INFO, info) < 0)
assert(handle && info);
if (ioctl(handle->fd, SND_CTL_IOCTL_PCM_INFO, info) < 0)
return -errno;
return 0;
}
int snd_ctl_pcm_stream_info(snd_ctl_t *handle, int dev, int str, int subdev, snd_pcm_stream_info_t * info)
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *handle, int subdev)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !info || dev < 0 || str < 0 || str > 1 || subdev < 0)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_DEVICE, &dev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_STREAM, &str) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_SUBDEVICE, &subdev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_STREAM_INFO, info) < 0)
assert(handle);
if (ioctl(handle->fd, SND_CTL_IOCTL_PCM_PREFER_SUBDEVICE, &subdev) < 0)
return -errno;
return 0;
}
int snd_ctl_pcm_stream_prefer_subdevice(snd_ctl_t *handle, int dev, int str, int subdev)
int snd_ctl_mixer_info(snd_ctl_t *handle, snd_mixer_info_t * info)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || dev < 0 || str < 0 || str > 1)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_DEVICE, &dev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_STREAM, &str) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_PCM_PREFER_SUBDEVICE, &subdev) < 0)
assert(handle && info);
if (ioctl(handle->fd, SND_CTL_IOCTL_MIXER_INFO, info) < 0)
return -errno;
return 0;
}
int snd_ctl_mixer_info(snd_ctl_t *handle, int dev, snd_mixer_info_t * info)
int snd_ctl_rawmidi_info(snd_ctl_t *handle, snd_rawmidi_info_t * info)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !info || dev < 0)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_MIXER_DEVICE, &dev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_MIXER_INFO, info) < 0)
return -errno;
return 0;
}
int snd_ctl_rawmidi_info(snd_ctl_t *handle, int dev, snd_rawmidi_info_t * info)
{
snd_ctl_t *ctl;
ctl = handle;
if (!ctl || !info)
return -EINVAL;
if (ioctl(ctl->fd, SND_CTL_IOCTL_RAWMIDI_DEVICE, &dev) < 0)
return -errno;
if (ioctl(ctl->fd, SND_CTL_IOCTL_RAWMIDI_INFO, info) < 0)
assert(handle && info);
if (ioctl(handle->fd, SND_CTL_IOCTL_RAWMIDI_INFO, info) < 0)
return -errno;
return 0;
}
int snd_ctl_read(snd_ctl_t *handle, snd_ctl_callbacks_t * callbacks)
{
snd_ctl_t *ctl;
int result, count;
snd_ctl_read_t r;
ctl = handle;
if (!ctl)
return -EINVAL;
assert(handle);
count = 0;
while ((result = read(ctl->fd, &r, sizeof(r))) > 0) {
while ((result = read(handle->fd, &r, sizeof(r))) > 0) {
if (result != sizeof(r))
return -EIO;
if (!callbacks)