libsigrok/hardware/alsa/protocol.h

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2011 Daniel Ribeiro <drwyrm@gmail.com>
* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef LIBSIGROK_HARDWARE_ALSA_PROTOCOL_H
#define LIBSIGROK_HARDWARE_ALSA_PROTOCOL_H
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#include <stdint.h>
#include <alsa/asoundlib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
/* Message logging helpers with driver-specific prefix string. */
#define DRIVER_LOG_DOMAIN "alsa: "
#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
/** Private, per-device-instance driver context. */
struct dev_context {
uint64_t cur_samplerate;
uint64_t limit_samples;
uint64_t num_samples;
uint8_t num_probes;
struct sr_samplerates supp_rates;
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char *hwdev;
snd_pcm_t *capture_handle;
snd_pcm_hw_params_t *hw_params;
struct pollfd *ufds;
void *cb_data;
};
SR_PRIV GSList *alsa_scan(GSList *options, struct sr_dev_driver *di);
SR_PRIV void alsa_dev_inst_clear(struct sr_dev_inst *sdi);
SR_PRIV int alsa_set_samplerate(const struct sr_dev_inst *sdi,
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uint64_t newrate);
SR_PRIV int alsa_receive_data(int fd, int revents, void *cb_data);
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#endif