/* $NetBSD: dtvvar.h,v 1.7 2025/11/15 19:12:13 jmcneill Exp $ */

/*-
 * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _DEV_DTV_DTVVAR_H
#define _DEV_DTV_DTVVAR_H

#include <dev/dtv/dtvif.h>
#include <dev/dtv/dtv_scatter.h>

#define DTV_DEFAULT_BLOCKSIZE   (32 * PAGE_SIZE)
#define DTV_DEFAULT_BUFSIZE     (32 * DTV_DEFAULT_BLOCKSIZE)

#define TS_PKTLEN               188
#define TS_HAS_SYNC(_tspkt)     ((_tspkt)[0] == 0x47)
#define TS_HAS_PUSI(_tspkt)     ((_tspkt)[1] & 0x40)
#define TS_HAS_AF(_tspkt)       ((_tspkt)[3] & 0x20)
#define TS_HAS_PAYLOAD(_tspkt)  ((_tspkt)[3] & 0x10)
#define TS_PID(_tspkt)          ((((_tspkt)[1] & 0x1f) << 8) | (_tspkt)[2])
#define TS_SECTION_MAXLEN       4096

struct dtv_buffer {
        uint32_t        db_offset;
        uint32_t        db_bytesused;
        size_t          db_length;
        SIMPLEQ_ENTRY(dtv_buffer) db_entries;
};

SIMPLEQ_HEAD(dtv_sample_queue, dtv_buffer);

struct dtv_stream {
        unsigned int            ds_nbufs;
        struct dtv_buffer       **ds_buf;
        struct dtv_scatter_buf  ds_data;
        struct dtv_sample_queue ds_ingress, ds_egress;
        kmutex_t                ds_ingress_lock, ds_egress_lock;
        kcondvar_t              ds_sample_cv;
        struct selinfo          ds_sel;
        uint32_t                ds_bytesread;
};

typedef enum {
        DTV_DEMUX_MODE_NONE,
        DTV_DEMUX_MODE_SECTION,
        DTV_DEMUX_MODE_PES,
} dtv_demux_mode_t;

struct dtv_ts_section {
        uint8_t                 sec_buf[TS_SECTION_MAXLEN];
        uint16_t                sec_bytesused;
        uint16_t                sec_length;
};

struct dtv_demux {
        struct dtv_softc        *dd_sc;
        struct selinfo          dd_sel;
        kmutex_t                dd_lock;
        kcondvar_t              dd_section_cv;

        bool                    dd_running;

        dtv_demux_mode_t        dd_mode;
        struct {
                struct dmx_sct_filter_params    params;
                struct dtv_ts_section           section[16];
                unsigned int                    rp, wp;
                unsigned int                    nsections;
                bool                            overflow;
        } dd_secfilt;

        TAILQ_ENTRY(dtv_demux)  dd_entries;
};

struct dtv_ts {
        uint8_t                 ts_pidfilter[0x2000];
        kmutex_t                ts_lock;
};

struct dtv_softc {
        device_t        sc_dev;
        const struct dtv_hw_if *sc_hw;
        void            *sc_priv;

        bool            sc_dying;

        unsigned int    sc_open;
        kmutex_t        sc_lock;

        size_t          sc_bufsize;
        bool            sc_bufsize_chg;

        struct dtv_stream sc_stream;
        struct dtv_ts   sc_ts;

        TAILQ_HEAD(, dtv_demux) sc_demux_list;
        kmutex_t        sc_demux_lock;
        int             sc_demux_runcnt;
};

#define dtv_device_get_devinfo(sc, info)        \
        ((sc)->sc_hw->get_devinfo((sc)->sc_priv, (info)))
#define dtv_device_open(sc, flags)              \
        ((sc)->sc_hw->open((sc)->sc_priv, (flags)))
#define dtv_device_close(sc)                    \
        ((sc)->sc_hw->close((sc)->sc_priv))
#define dtv_device_set_tuner(sc, params)        \
        ((sc)->sc_hw->set_tuner((sc)->sc_priv, (params)))
#define dtv_device_get_status(sc)               \
        ((sc)->sc_hw->get_status((sc)->sc_priv))
#define dtv_device_get_signal_strength(sc)      \
        ((sc)->sc_hw->get_signal_strength((sc)->sc_priv))
#define dtv_device_get_snr(sc)                  \
        ((sc)->sc_hw->get_snr((sc)->sc_priv))
#define dtv_device_start_transfer(sc)   \
        ((sc)->sc_hw->start_transfer((sc)->sc_priv, dtv_buffer_submit, (sc)))
#define dtv_device_stop_transfer(sc)            \
        ((sc)->sc_hw->stop_transfer((sc)->sc_priv))

int     dtv_frontend_ioctl(struct dtv_softc *, u_long, void *, int);

int     dtv_demux_open(struct dtv_softc *, int, int, lwp_t *);
void    dtv_demux_write(struct dtv_softc *, const uint8_t *, size_t);

int     dtv_buffer_realloc(struct dtv_softc *, size_t);
int     dtv_buffer_setup(struct dtv_softc *);
int     dtv_buffer_destroy(struct dtv_softc *);
int     dtv_buffer_read(struct dtv_softc *, struct uio *, int);
int     dtv_buffer_poll(struct dtv_softc *, int, lwp_t *);
void    dtv_buffer_submit(void *, const struct dtv_payload *);

void    dtv_common_close(struct dtv_softc *);

#endif /* !_DEV_DTV_DTVVAR_H */