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/*
* This file is part of the bladeRF project:
* http://www.github.com/nuand/bladeRF
*
* Copyright (C) 2014 Nuand LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef STREAMING_ASYNC_H_
#define STREAMING_ASYNC_H_
#include <pthread.h>
#include <libbladeRF.h>
#include "thread.h"
#include "format.h"
typedef enum {
STREAM_IDLE, /* Idle and initialized */
STREAM_RUNNING, /* Currently running */
STREAM_SHUTTING_DOWN, /* Currently tearing down.
* See bladerf_stream->error_code to determine
* whether or not the shutdown was a clean exit
* or due to an error. */
STREAM_DONE /* Done and deallocated */
} bladerf_stream_state;
struct bladerf_stream {
/* These items are configured in async_init_stream() and should only be
* read (NOT MODIFIED) during the execution of the stream */
struct bladerf *dev;
bladerf_channel_layout layout;
bladerf_format format;
unsigned int transfer_timeout;
bladerf_stream_cb cb;
void *user_data;
size_t samples_per_buffer;
size_t num_buffers;
void **buffers;
MUTEX lock;
/* The following items must be accessed atomically */
int error_code;
bladerf_stream_state state;
pthread_cond_t can_submit_buffer;
pthread_cond_t stream_started;
void *backend_data;
};
/* Get the number of bytes per stream buffer */
static inline size_t async_stream_buf_bytes(struct bladerf_stream *s)
{
if (s->format == BLADERF_FORMAT_PACKET_META)
return s->samples_per_buffer;
return samples_to_bytes(s->format, s->samples_per_buffer);
}
int async_init_stream(struct bladerf_stream **stream,
struct bladerf *dev,
bladerf_stream_cb callback,
void ***buffers,
size_t num_buffers,
bladerf_format format,
size_t buffer_size,
size_t num_transfers,
void *user_data);
/* Set the transfer timeout. This acquires stream->lock. */
int async_set_transfer_timeout(struct bladerf_stream *stream,
unsigned int transfer_timeout_ms);
/* Get the transfer timeout. This acquires stream->lock. */
int async_get_transfer_timeout(struct bladerf_stream *stream,
unsigned int *transfer_timeout_ms);
/* Backend code is responsible for acquiring stream->lock in their callbacks */
int async_run_stream(struct bladerf_stream *stream,
bladerf_channel_layout layout);
/* This function WILL acquire stream->lock before calling backend code.
*
* If nonblock=true and no transfers are available, this function shall return
* BLADERF_ERR_WOULD_BLOCK.
*/
int async_submit_stream_buffer(struct bladerf_stream *stream,
void *buffer,
size_t *length,
unsigned int timeout_ms,
bool nonblock);
void async_deinit_stream(struct bladerf_stream *stream);
#endif
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