mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
Added abstraction layer to controls. Added client/server support to controls. Cleaned private_data use for PCMs. Cleaned aserver
This commit is contained in:
Abramo Bagnara
parent
1acf1f3fb9
commit
df35e8457a
18 changed files with 1623 additions and 778 deletions
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@ -1,6 +1,6 @@
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/*
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* Control Interface - main file
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* Copyright (c) 1998,1999,2000 by Jaroslav Kysela <perex@suse.cz>
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* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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@ -25,145 +25,98 @@
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <assert.h>
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#include "asoundlib.h"
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#include "control_local.h"
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#define SND_FILE_CONTROL "/dev/snd/controlC%i"
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#define SND_CTL_VERSION_MAX SND_PROTOCOL_VERSION(2, 0, 0)
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int snd_ctl_open(snd_ctl_t **handle, int card)
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snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
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{
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int fd, ver;
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char filename[32];
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snd_ctl_t *ctl;
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*handle = NULL;
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assert(card >= 0 && card < SND_CARDS);
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sprintf(filename, SND_FILE_CONTROL, card);
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if ((fd = open(filename, O_RDWR)) < 0) {
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snd_card_load(card);
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if ((fd = open(filename, O_RDWR)) < 0)
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return -errno;
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}
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if (ioctl(fd, SND_CTL_IOCTL_PVERSION, &ver) < 0) {
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close(fd);
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return -errno;
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}
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if (SND_PROTOCOL_INCOMPATIBLE(ver, SND_CTL_VERSION_MAX)) {
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close(fd);
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return -SND_ERROR_INCOMPATIBLE_VERSION;
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}
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ctl = (snd_ctl_t *) calloc(1, sizeof(snd_ctl_t));
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if (ctl == NULL) {
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close(fd);
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return -ENOMEM;
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}
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ctl->card = card;
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ctl->fd = fd;
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INIT_LIST_HEAD(&ctl->hlist);
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*handle = ctl;
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return 0;
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return ctl->type;
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}
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int snd_ctl_close(snd_ctl_t *handle)
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int snd_ctl_close(snd_ctl_t *ctl)
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{
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int res;
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assert(handle);
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res = close(handle->fd) < 0 ? -errno : 0;
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free(handle);
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assert(ctl);
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res = ctl->ops->close(ctl);
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free(ctl);
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return res;
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}
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int snd_ctl_file_descriptor(snd_ctl_t *handle)
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int snd_ctl_file_descriptor(snd_ctl_t *ctl)
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{
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assert(handle);
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return handle->fd;
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assert(ctl);
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return ctl->ops->file_descriptor(ctl);
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}
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int snd_ctl_hw_info(snd_ctl_t *handle, snd_ctl_hw_info_t *info)
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int snd_ctl_hw_info(snd_ctl_t *ctl, snd_ctl_hw_info_t *info)
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{
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assert(handle && info);
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if (ioctl(handle->fd, SND_CTL_IOCTL_HW_INFO, info) < 0)
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return -errno;
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return 0;
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assert(ctl && info);
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return ctl->ops->hw_info(ctl, info);
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}
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int snd_ctl_clist(snd_ctl_t *handle, snd_control_list_t *list)
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int snd_ctl_clist(snd_ctl_t *ctl, snd_control_list_t *list)
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{
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assert(handle && list);
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if (ioctl(handle->fd, SND_CTL_IOCTL_CONTROL_LIST, list) < 0)
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return -errno;
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return 0;
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assert(ctl && list);
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return ctl->ops->clist(ctl, list);
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}
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int snd_ctl_cinfo(snd_ctl_t *handle, snd_control_info_t *info)
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int snd_ctl_cinfo(snd_ctl_t *ctl, snd_control_info_t *info)
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{
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assert(handle && info && (info->id.name[0] || info->id.numid));
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if (ioctl(handle->fd, SND_CTL_IOCTL_CONTROL_INFO, info) < 0)
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return -errno;
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return 0;
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assert(ctl && info && (info->id.name[0] || info->id.numid));
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return ctl->ops->cinfo(ctl, info);
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}
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int snd_ctl_cread(snd_ctl_t *handle, snd_control_t *control)
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int snd_ctl_cread(snd_ctl_t *ctl, snd_control_t *control)
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{
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assert(handle && control && (control->id.name[0] || control->id.numid));
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if (ioctl(handle->fd, SND_CTL_IOCTL_CONTROL_READ, control) < 0)
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return -errno;
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return 0;
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assert(ctl && control && (control->id.name[0] || control->id.numid));
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return ctl->ops->cread(ctl, control);
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}
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int snd_ctl_cwrite(snd_ctl_t *handle, snd_control_t *control)
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int snd_ctl_cwrite(snd_ctl_t *ctl, snd_control_t *control)
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{
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assert(handle && control && (control->id.name[0] || control->id.numid));
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if (ioctl(handle->fd, SND_CTL_IOCTL_CONTROL_WRITE, control) < 0)
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return -errno;
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return 0;
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assert(ctl && control && (control->id.name[0] || control->id.numid));
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return ctl->ops->cwrite(ctl, control);
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}
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int snd_ctl_hwdep_info(snd_ctl_t *handle, snd_hwdep_info_t * info)
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int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info)
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{
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assert(handle && info);
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if (ioctl(handle->fd, SND_CTL_IOCTL_HWDEP_INFO, info) < 0)
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return -errno;
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return 0;
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assert(ctl && info);
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return ctl->ops->hwdep_info(ctl, info);
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}
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int snd_ctl_pcm_info(snd_ctl_t *handle, snd_pcm_info_t * info)
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int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info)
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{
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assert(handle && info);
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if (ioctl(handle->fd, SND_CTL_IOCTL_PCM_INFO, info) < 0)
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return -errno;
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return 0;
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assert(ctl && info);
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return ctl->ops->pcm_info(ctl, info);
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}
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int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *handle, int subdev)
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int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
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{
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assert(handle);
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if (ioctl(handle->fd, SND_CTL_IOCTL_PCM_PREFER_SUBDEVICE, &subdev) < 0)
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return -errno;
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return 0;
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assert(ctl);
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return ctl->ops->pcm_prefer_subdevice(ctl, subdev);
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}
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int snd_ctl_rawmidi_info(snd_ctl_t *handle, snd_rawmidi_info_t * info)
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int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info)
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{
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assert(handle && info);
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if (ioctl(handle->fd, SND_CTL_IOCTL_RAWMIDI_INFO, info) < 0)
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return -errno;
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return 0;
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assert(ctl && info);
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return ctl->ops->rawmidi_info(ctl, info);
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}
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int snd_ctl_read(snd_ctl_t *handle, snd_ctl_callbacks_t * callbacks)
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int snd_ctl_read1(snd_ctl_t *ctl, snd_ctl_event_t *event)
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{
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assert(ctl && event);
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return ctl->ops->read(ctl, event);
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}
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int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_callbacks_t * callbacks)
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{
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int result, count;
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snd_ctl_event_t r;
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assert(handle);
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assert(ctl);
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count = 0;
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while ((result = read(handle->fd, &r, sizeof(r))) > 0) {
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while ((result = snd_ctl_read1(ctl, &r)) > 0) {
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if (result != sizeof(r))
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return -EIO;
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if (!callbacks)
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@ -171,26 +124,142 @@ int snd_ctl_read(snd_ctl_t *handle, snd_ctl_callbacks_t * callbacks)
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switch (r.type) {
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case SND_CTL_EVENT_REBUILD:
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if (callbacks->rebuild)
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callbacks->rebuild(handle, callbacks->private_data);
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callbacks->rebuild(ctl, callbacks->private_data);
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break;
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case SND_CTL_EVENT_VALUE:
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if (callbacks->value)
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callbacks->value(handle, callbacks->private_data, &r.data.id);
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callbacks->value(ctl, callbacks->private_data, &r.data.id);
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break;
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case SND_CTL_EVENT_CHANGE:
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if (callbacks->change)
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callbacks->change(handle, callbacks->private_data, &r.data.id);
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callbacks->change(ctl, callbacks->private_data, &r.data.id);
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break;
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case SND_CTL_EVENT_ADD:
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if (callbacks->add)
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callbacks->add(handle, callbacks->private_data, &r.data.id);
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callbacks->add(ctl, callbacks->private_data, &r.data.id);
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break;
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case SND_CTL_EVENT_REMOVE:
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if (callbacks->remove)
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callbacks->remove(handle, callbacks->private_data, &r.data.id);
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callbacks->remove(ctl, callbacks->private_data, &r.data.id);
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break;
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}
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count++;
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}
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return result >= 0 ? count : -errno;
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}
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static int _snd_ctl_open_hw(snd_ctl_t **handlep, snd_config_t *conf)
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{
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snd_config_iterator_t i;
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long card = -1;
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char *str;
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int err;
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snd_config_foreach(i, conf) {
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snd_config_t *n = snd_config_entry(i);
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if (strcmp(n->id, "comment") == 0)
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continue;
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if (strcmp(n->id, "type") == 0)
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continue;
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if (strcmp(n->id, "card") == 0) {
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err = snd_config_integer_get(n, &card);
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if (err < 0) {
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err = snd_config_string_get(n, &str);
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if (err < 0)
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return -EINVAL;
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card = snd_card_get_index(str);
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if (card < 0)
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return card;
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}
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continue;
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}
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return -EINVAL;
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}
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if (card < 0)
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return -EINVAL;
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return snd_ctl_hw_open(handlep, card);
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}
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static int _snd_ctl_open_client(snd_ctl_t **handlep, snd_config_t *conf)
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{
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snd_config_iterator_t i;
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char *socket = NULL;
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char *name = NULL;
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char *host = NULL;
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long port = -1;
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int err;
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snd_config_foreach(i, conf) {
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snd_config_t *n = snd_config_entry(i);
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if (strcmp(n->id, "comment") == 0)
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continue;
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if (strcmp(n->id, "type") == 0)
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continue;
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if (strcmp(n->id, "socket") == 0) {
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err = snd_config_string_get(n, &socket);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "host") == 0) {
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err = snd_config_string_get(n, &host);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "port") == 0) {
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err = snd_config_integer_get(n, &port);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "name") == 0) {
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err = snd_config_string_get(n, &name);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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return -EINVAL;
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}
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if (!name)
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return -EINVAL;
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if (socket) {
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if (port >= 0 || host)
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return -EINVAL;
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return snd_ctl_client_open(handlep, socket, -1, SND_TRANSPORT_TYPE_SHM, name);
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} else {
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if (port < 0 || !name)
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return -EINVAL;
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return snd_ctl_client_open(handlep, host, port, SND_TRANSPORT_TYPE_TCP, name);
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}
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}
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int snd_ctl_open(snd_ctl_t **handlep, char *name)
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{
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char *str;
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int err;
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snd_config_t *ctl_conf, *conf;
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assert(handlep && name);
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err = snd_config_update();
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if (err < 0)
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return err;
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err = snd_config_searchv(snd_config, &ctl_conf, "ctl", name, 0);
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if (err < 0) {
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int idx = snd_card_get_index(name);
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if (idx < 0)
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return idx;
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return snd_ctl_hw_open(handlep, idx);
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}
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if (snd_config_type(ctl_conf) != SND_CONFIG_TYPE_COMPOUND)
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return -EINVAL;
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err = snd_config_search(ctl_conf, "type", &conf);
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if (err < 0)
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return err;
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err = snd_config_string_get(conf, &str);
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if (err < 0)
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return err;
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if (strcmp(str, "hw") == 0)
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return _snd_ctl_open_hw(handlep, ctl_conf);
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else if (strcmp(str, "client") == 0)
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return _snd_ctl_open_client(handlep, ctl_conf);
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else
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return -EINVAL;
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}
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