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