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/*
* SPDX-License-Identifier: GPL-2.0
*
* dvb-vb2.h - DVB driver helper framework for streaming I/O
*
* Copyright (C) 2015 Samsung Electronics
*
* Author: jh1009.sung@samsung.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.
*/
#ifndef _DVB_VB2_H
#define _DVB_VB2_H
#include <linux/mutex.h>
#include <linux/poll.h>
#include <linux/dvb/dmx.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-vmalloc.h>
enum dvb_buf_type {
DVB_BUF_TYPE_CAPTURE = 1,
};
#define DVB_VB2_STATE_NONE (0x0)
#define DVB_VB2_STATE_INIT (0x1)
#define DVB_VB2_STATE_REQBUFS (0x2)
#define DVB_VB2_STATE_STREAMON (0x4)
#define DVB_VB2_NAME_MAX (20)
struct dvb_buffer {
struct vb2_buffer vb;
struct list_head list;
};
struct dvb_vb2_ctx {
struct vb2_queue vb_q;
struct mutex mutex;
spinlock_t slock;
struct list_head dvb_q;
struct dvb_buffer *buf;
int offset;
int remain;
int state;
int buf_siz;
int buf_cnt;
int nonblocking;
char name[DVB_VB2_NAME_MAX + 1];
};
int dvb_vb2_stream_on(struct dvb_vb2_ctx *ctx);
int dvb_vb2_stream_off(struct dvb_vb2_ctx *ctx);
#ifndef DVB_MMAP
static inline int dvb_vb2_init(struct dvb_vb2_ctx *ctx,
const char *name, int non_blocking)
{
return 0;
};
static inline int dvb_vb2_release(struct dvb_vb2_ctx *ctx)
{
return 0;
};
#define dvb_vb2_is_streaming(ctx) (0)
#define dvb_vb2_fill_buffer(ctx, file, wait) (0)
static inline unsigned int dvb_vb2_poll(struct dvb_vb2_ctx *ctx,
struct file *file,
poll_table *wait)
{
return 0;
}
#else
int dvb_vb2_init(struct dvb_vb2_ctx *ctx, const char *name, int non_blocking);
int dvb_vb2_release(struct dvb_vb2_ctx *ctx);
int dvb_vb2_is_streaming(struct dvb_vb2_ctx *ctx);
int dvb_vb2_fill_buffer(struct dvb_vb2_ctx *ctx,
const unsigned char *src, int len);
unsigned int dvb_vb2_poll(struct dvb_vb2_ctx *ctx, struct file *file,
poll_table *wait);
#endif
int dvb_vb2_reqbufs(struct dvb_vb2_ctx *ctx, struct dmx_requestbuffers *req);
int dvb_vb2_querybuf(struct dvb_vb2_ctx *ctx, struct dmx_buffer *b);
int dvb_vb2_expbuf(struct dvb_vb2_ctx *ctx, struct dmx_exportbuffer *exp);
int dvb_vb2_qbuf(struct dvb_vb2_ctx *ctx, struct dmx_buffer *b);
int dvb_vb2_dqbuf(struct dvb_vb2_ctx *ctx, struct dmx_buffer *b);
int dvb_vb2_mmap(struct dvb_vb2_ctx *ctx, struct vm_area_struct *vma);
#endif /* _DVB_VB2_H */
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