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av7110_av.c

/*
 * av7110_av.c: audio and video MPEG decoder stuff
 *
 * Copyright (C) 1999-2002 Ralph  Metzler
 *                       & Marcus Metzler for convergence integrated media GmbH
 *
 * originally based on code by:
 * Copyright (C) 1998,1999 Christian Theiss <mistert@rz.fh-augsburg.de>
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 *
 * the project's page is at http://www.linuxtv.org/dvb/
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/fs.h>

#include "av7110.h"
#include "av7110_hw.h"
#include "av7110_av.h"
#include "av7110_ipack.h"

/* MPEG-2 (ISO 13818 / H.222.0) stream types */
#define PROG_STREAM_MAP  0xBC
#define PRIVATE_STREAM1  0xBD
#define PADDING_STREAM   0xBE
#define PRIVATE_STREAM2  0xBF
#define AUDIO_STREAM_S   0xC0
#define AUDIO_STREAM_E   0xDF
#define VIDEO_STREAM_S   0xE0
#define VIDEO_STREAM_E   0xEF
#define ECM_STREAM       0xF0
#define EMM_STREAM       0xF1
#define DSM_CC_STREAM    0xF2
#define ISO13522_STREAM  0xF3
#define PROG_STREAM_DIR  0xFF

#define PTS_DTS_FLAGS    0xC0

//pts_dts flags
#define PTS_ONLY   0x80
#define PTS_DTS          0xC0
#define TS_SIZE          188
#define TRANS_ERROR      0x80
#define PAY_START  0x40
#define TRANS_PRIO       0x20
#define PID_MASK_HI      0x1F
//flags
#define TRANS_SCRMBL1    0x80
#define TRANS_SCRMBL2    0x40
#define ADAPT_FIELD      0x20
#define PAYLOAD          0x10
#define COUNT_MASK       0x0F

// adaptation flags
#define DISCON_IND       0x80
#define RAND_ACC_IND     0x40
#define ES_PRI_IND       0x20
#define PCR_FLAG   0x10
#define OPCR_FLAG  0x08
#define SPLICE_FLAG      0x04
#define TRANS_PRIV       0x02
#define ADAP_EXT_FLAG    0x01

// adaptation extension flags
#define LTW_FLAG   0x80
#define PIECE_RATE       0x40
#define SEAM_SPLICE      0x20


static void p_to_t(u8 const *buf, long int length, u16 pid,
               u8 *counter, struct dvb_demux_feed *feed);


int av7110_record_cb(struct dvb_filter_pes2ts *p2t, u8 *buf, size_t len)
{
      struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) p2t->priv;

      if (!(dvbdmxfeed->ts_type & TS_PACKET))
            return 0;
      if (buf[3] == 0xe0)      // video PES do not have a length in TS
            buf[4] = buf[5] = 0;
      if (dvbdmxfeed->ts_type & TS_PAYLOAD_ONLY)
            return dvbdmxfeed->cb.ts(buf, len, NULL, 0,
                               &dvbdmxfeed->feed.ts, DMX_OK);
      else
            return dvb_filter_pes2ts(p2t, buf, len, 1);
}

static int dvb_filter_pes2ts_cb(void *priv, unsigned char *data)
{
      struct dvb_demux_feed *dvbdmxfeed = (struct dvb_demux_feed *) priv;

      dvbdmxfeed->cb.ts(data, 188, NULL, 0,
                    &dvbdmxfeed->feed.ts, DMX_OK);
      return 0;
}

int av7110_av_start_record(struct av7110 *av7110, int av,
                     struct dvb_demux_feed *dvbdmxfeed)
{
      int ret = 0;
      struct dvb_demux *dvbdmx = dvbdmxfeed->demux;

      dprintk(2, "av7110:%p, , dvb_demux_feed:%p\n", av7110, dvbdmxfeed);

      if (av7110->playing || (av7110->rec_mode & av))
            return -EBUSY;
      av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Stop, 0);
      dvbdmx->recording = 1;
      av7110->rec_mode |= av;

      switch (av7110->rec_mode) {
      case RP_AUDIO:
            dvb_filter_pes2ts_init(&av7110->p2t[0],
                               dvbdmx->pesfilter[0]->pid,
                               dvb_filter_pes2ts_cb,
                               (void *) dvbdmx->pesfilter[0]);
            ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Record, 2, AudioPES, 0);
            break;

      case RP_VIDEO:
            dvb_filter_pes2ts_init(&av7110->p2t[1],
                               dvbdmx->pesfilter[1]->pid,
                               dvb_filter_pes2ts_cb,
                               (void *) dvbdmx->pesfilter[1]);
            ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Record, 2, VideoPES, 0);
            break;

      case RP_AV:
            dvb_filter_pes2ts_init(&av7110->p2t[0],
                               dvbdmx->pesfilter[0]->pid,
                               dvb_filter_pes2ts_cb,
                               (void *) dvbdmx->pesfilter[0]);
            dvb_filter_pes2ts_init(&av7110->p2t[1],
                               dvbdmx->pesfilter[1]->pid,
                               dvb_filter_pes2ts_cb,
                               (void *) dvbdmx->pesfilter[1]);
            ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Record, 2, AV_PES, 0);
            break;
      }
      return ret;
}

int av7110_av_start_play(struct av7110 *av7110, int av)
{
      int ret = 0;
      dprintk(2, "av7110:%p, \n", av7110);

      if (av7110->rec_mode)
            return -EBUSY;
      if (av7110->playing & av)
            return -EBUSY;

      av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Stop, 0);

      if (av7110->playing == RP_NONE) {
            av7110_ipack_reset(&av7110->ipack[0]);
            av7110_ipack_reset(&av7110->ipack[1]);
      }

      av7110->playing |= av;
      switch (av7110->playing) {
      case RP_AUDIO:
            ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Play, 2, AudioPES, 0);
            break;
      case RP_VIDEO:
            ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Play, 2, VideoPES, 0);
            av7110->sinfo = 0;
            break;
      case RP_AV:
            av7110->sinfo = 0;
            ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Play, 2, AV_PES, 0);
            break;
      }
      if (!ret)
            ret = av7110->playing;
      return ret;
}

int av7110_av_stop(struct av7110 *av7110, int av)
{
      int ret = 0;
      dprintk(2, "av7110:%p, \n", av7110);

      if (!(av7110->playing & av) && !(av7110->rec_mode & av))
            return 0;
      av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Stop, 0);
      if (av7110->playing) {
            av7110->playing &= ~av;
            switch (av7110->playing) {
            case RP_AUDIO:
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Play, 2, AudioPES, 0);
                  break;
            case RP_VIDEO:
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Play, 2, VideoPES, 0);
                  break;
            case RP_NONE:
                  ret = av7110_set_vidmode(av7110, av7110->vidmode);
                  break;
            }
      } else {
            av7110->rec_mode &= ~av;
            switch (av7110->rec_mode) {
            case RP_AUDIO:
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Record, 2, AudioPES, 0);
                  break;
            case RP_VIDEO:
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Record, 2, VideoPES, 0);
                  break;
            case RP_NONE:
                  break;
            }
      }
      return ret;
}


int av7110_pes_play(void *dest, struct dvb_ringbuffer *buf, int dlen)
{
      int len;
      u32 sync;
      u16 blen;

      if (!dlen) {
            wake_up(&buf->queue);
            return -1;
      }
      while (1) {
            if ((len = dvb_ringbuffer_avail(buf)) < 6)
                  return -1;
            sync =  DVB_RINGBUFFER_PEEK(buf, 0) << 24;
            sync |= DVB_RINGBUFFER_PEEK(buf, 1) << 16;
            sync |= DVB_RINGBUFFER_PEEK(buf, 2) << 8;
            sync |= DVB_RINGBUFFER_PEEK(buf, 3);

            if (((sync &~ 0x0f) == 0x000001e0) ||
                ((sync &~ 0x1f) == 0x000001c0) ||
                (sync == 0x000001bd))
                  break;
            printk("resync\n");
            DVB_RINGBUFFER_SKIP(buf, 1);
      }
      blen =  DVB_RINGBUFFER_PEEK(buf, 4) << 8;
      blen |= DVB_RINGBUFFER_PEEK(buf, 5);
      blen += 6;
      if (len < blen || blen > dlen) {
            //printk("buffer empty - avail %d blen %u dlen %d\n", len, blen, dlen);
            wake_up(&buf->queue);
            return -1;
      }

      dvb_ringbuffer_read(buf, dest, (size_t) blen, 0);

      dprintk(2, "pread=0x%08lx, pwrite=0x%08lx\n",
             (unsigned long) buf->pread, (unsigned long) buf->pwrite);
      wake_up(&buf->queue);
      return blen;
}


int av7110_set_volume(struct av7110 *av7110, int volleft, int volright)
{
      int err, vol, val, balance = 0;

      dprintk(2, "av7110:%p, \n", av7110);

      av7110->mixer.volume_left = volleft;
      av7110->mixer.volume_right = volright;

      switch (av7110->adac_type) {
      case DVB_ADAC_TI:
            volleft = (volleft * 256) / 1036;
            volright = (volright * 256) / 1036;
            if (volleft > 0x3f)
                  volleft = 0x3f;
            if (volright > 0x3f)
                  volright = 0x3f;
            if ((err = SendDAC(av7110, 3, 0x80 + volleft)))
                  return err;
            return SendDAC(av7110, 4, volright);

      case DVB_ADAC_CRYSTAL:
            volleft = 127 - volleft / 2;
            volright = 127 - volright / 2;
            i2c_writereg(av7110, 0x20, 0x03, volleft);
            i2c_writereg(av7110, 0x20, 0x04, volright);
            return 0;

      case DVB_ADAC_MSP34x0:
            vol  = (volleft > volright) ? volleft : volright;
            val   = (vol * 0x73 / 255) << 8;
            if (vol > 0)
                   balance = ((volright - volleft) * 127) / vol;
            msp_writereg(av7110, MSP_WR_DSP, 0x0001, balance << 8);
            msp_writereg(av7110, MSP_WR_DSP, 0x0000, val); /* loudspeaker */
            msp_writereg(av7110, MSP_WR_DSP, 0x0006, val); /* headphonesr */
            return 0;

      case DVB_ADAC_MSP34x5:
            vol = (volleft > volright) ? volleft : volright;
            val = (vol * 0x73 / 255) << 8;
            if (vol > 0)
                  balance = ((volright - volleft) * 127) / vol;
            msp_writereg(av7110, MSP_WR_DSP, 0x0001, balance << 8);
            msp_writereg(av7110, MSP_WR_DSP, 0x0000, val); /* loudspeaker */
            return 0;
      }

      return 0;
}

int av7110_set_vidmode(struct av7110 *av7110, int mode)
{
      int ret;
      dprintk(2, "av7110:%p, \n", av7110);

      ret = av7110_fw_cmd(av7110, COMTYPE_ENCODER, LoadVidCode, 1, mode);

      if (!ret && !av7110->playing) {
            ret = ChangePIDs(av7110, av7110->pids[DMX_PES_VIDEO],
                     av7110->pids[DMX_PES_AUDIO],
                     av7110->pids[DMX_PES_TELETEXT],
                     0, av7110->pids[DMX_PES_PCR]);
            if (!ret)
                  ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, Scan, 0);
      }
      return ret;
}


static int sw2mode[16] = {
      VIDEO_MODE_PAL, VIDEO_MODE_NTSC, VIDEO_MODE_NTSC, VIDEO_MODE_PAL,
      VIDEO_MODE_NTSC, VIDEO_MODE_NTSC, VIDEO_MODE_PAL, VIDEO_MODE_NTSC,
      VIDEO_MODE_PAL, VIDEO_MODE_PAL, VIDEO_MODE_PAL, VIDEO_MODE_PAL,
      VIDEO_MODE_PAL, VIDEO_MODE_PAL, VIDEO_MODE_PAL, VIDEO_MODE_PAL,
};

static int get_video_format(struct av7110 *av7110, u8 *buf, int count)
{
      int i;
      int hsize, vsize;
      int sw;
      u8 *p;
      int ret = 0;

      dprintk(2, "av7110:%p, \n", av7110);

      if (av7110->sinfo)
            return 0;
      for (i = 7; i < count - 10; i++) {
            p = buf + i;
            if (p[0] || p[1] || p[2] != 0x01 || p[3] != 0xb3)
                  continue;
            p += 4;
            hsize = ((p[1] &0xF0) >> 4) | (p[0] << 4);
            vsize = ((p[1] &0x0F) << 8) | (p[2]);
            sw = (p[3] & 0x0F);
            ret = av7110_set_vidmode(av7110, sw2mode[sw]);
            if (!ret) {
                  dprintk(2, "playback %dx%d fr=%d\n", hsize, vsize, sw);
                  av7110->sinfo = 1;
            }
            break;
      }
      return ret;
}


/****************************************************************************
 * I/O buffer management and control
 ****************************************************************************/

static inline long aux_ring_buffer_write(struct dvb_ringbuffer *rbuf,
                               const u8 *buf, unsigned long count)
{
      unsigned long todo = count;
      int free;

      while (todo > 0) {
            if (dvb_ringbuffer_free(rbuf) < 2048) {
                  if (wait_event_interruptible(rbuf->queue,
                                         (dvb_ringbuffer_free(rbuf) >= 2048)))
                        return count - todo;
            }
            free = dvb_ringbuffer_free(rbuf);
            if (free > todo)
                  free = todo;
            dvb_ringbuffer_write(rbuf, buf, free);
            todo -= free;
            buf += free;
      }

      return count - todo;
}

static void play_video_cb(u8 *buf, int count, void *priv)
{
      struct av7110 *av7110 = (struct av7110 *) priv;
      dprintk(2, "av7110:%p, \n", av7110);

      if ((buf[3] & 0xe0) == 0xe0) {
            get_video_format(av7110, buf, count);
            aux_ring_buffer_write(&av7110->avout, buf, count);
      } else
            aux_ring_buffer_write(&av7110->aout, buf, count);
}

static void play_audio_cb(u8 *buf, int count, void *priv)
{
      struct av7110 *av7110 = (struct av7110 *) priv;
      dprintk(2, "av7110:%p, \n", av7110);

      aux_ring_buffer_write(&av7110->aout, buf, count);
}

#define FREE_COND (dvb_ringbuffer_free(&av7110->avout) >= 20 * 1024 && \
               dvb_ringbuffer_free(&av7110->aout) >= 20 * 1024)

static ssize_t dvb_play(struct av7110 *av7110, const char __user *buf,
                  unsigned long count, int nonblock, int type)
{
      unsigned long todo = count, n;
      dprintk(2, "av7110:%p, \n", av7110);

      if (!av7110->kbuf[type])
            return -ENOBUFS;

      if (nonblock && !FREE_COND)
            return -EWOULDBLOCK;

      while (todo > 0) {
            if (!FREE_COND) {
                  if (nonblock)
                        return count - todo;
                  if (wait_event_interruptible(av7110->avout.queue,
                                         FREE_COND))
                        return count - todo;
            }
            n = todo;
            if (n > IPACKS * 2)
                  n = IPACKS * 2;
            if (copy_from_user(av7110->kbuf[type], buf, n))
                  return -EFAULT;
            av7110_ipack_instant_repack(av7110->kbuf[type], n,
                                  &av7110->ipack[type]);
            todo -= n;
            buf += n;
      }
      return count - todo;
}

static ssize_t dvb_play_kernel(struct av7110 *av7110, const u8 *buf,
                  unsigned long count, int nonblock, int type)
{
      unsigned long todo = count, n;
      dprintk(2, "av7110:%p, \n", av7110);

      if (!av7110->kbuf[type])
            return -ENOBUFS;

      if (nonblock && !FREE_COND)
            return -EWOULDBLOCK;

      while (todo > 0) {
            if (!FREE_COND) {
                  if (nonblock)
                        return count - todo;
                  if (wait_event_interruptible(av7110->avout.queue,
                                         FREE_COND))
                        return count - todo;
            }
            n = todo;
            if (n > IPACKS * 2)
                  n = IPACKS * 2;
            av7110_ipack_instant_repack(buf, n, &av7110->ipack[type]);
            todo -= n;
            buf += n;
      }
      return count - todo;
}

static ssize_t dvb_aplay(struct av7110 *av7110, const char __user *buf,
                   unsigned long count, int nonblock, int type)
{
      unsigned long todo = count, n;
      dprintk(2, "av7110:%p, \n", av7110);

      if (!av7110->kbuf[type])
            return -ENOBUFS;
      if (nonblock && dvb_ringbuffer_free(&av7110->aout) < 20 * 1024)
            return -EWOULDBLOCK;

      while (todo > 0) {
            if (dvb_ringbuffer_free(&av7110->aout) < 20 * 1024) {
                  if (nonblock)
                        return count - todo;
                  if (wait_event_interruptible(av7110->aout.queue,
                              (dvb_ringbuffer_free(&av7110->aout) >= 20 * 1024)))
                        return count-todo;
            }
            n = todo;
            if (n > IPACKS * 2)
                  n = IPACKS * 2;
            if (copy_from_user(av7110->kbuf[type], buf, n))
                  return -EFAULT;
            av7110_ipack_instant_repack(av7110->kbuf[type], n,
                                  &av7110->ipack[type]);
            todo -= n;
            buf += n;
      }
      return count - todo;
}

void av7110_p2t_init(struct av7110_p2t *p, struct dvb_demux_feed *feed)
{
      memset(p->pes, 0, TS_SIZE);
      p->counter = 0;
      p->pos = 0;
      p->frags = 0;
      if (feed)
            p->feed = feed;
}

static void clear_p2t(struct av7110_p2t *p)
{
      memset(p->pes, 0, TS_SIZE);
//    p->counter = 0;
      p->pos = 0;
      p->frags = 0;
}


static int find_pes_header(u8 const *buf, long int length, int *frags)
{
      int c = 0;
      int found = 0;

      *frags = 0;

      while (c < length - 3 && !found) {
            if (buf[c] == 0x00 && buf[c + 1] == 0x00 &&
                buf[c + 2] == 0x01) {
                  switch ( buf[c + 3] ) {
                  case PROG_STREAM_MAP:
                  case PRIVATE_STREAM2:
                  case PROG_STREAM_DIR:
                  case ECM_STREAM     :
                  case EMM_STREAM     :
                  case PADDING_STREAM :
                  case DSM_CC_STREAM  :
                  case ISO13522_STREAM:
                  case PRIVATE_STREAM1:
                  case AUDIO_STREAM_S ... AUDIO_STREAM_E:
                  case VIDEO_STREAM_S ... VIDEO_STREAM_E:
                        found = 1;
                        break;

                  default:
                        c++;
                        break;
                  }
            } else
                  c++;
      }
      if (c == length - 3 && !found) {
            if (buf[length - 1] == 0x00)
                  *frags = 1;
            if (buf[length - 2] == 0x00 &&
                buf[length - 1] == 0x00)
                  *frags = 2;
            if (buf[length - 3] == 0x00 &&
                buf[length - 2] == 0x00 &&
                buf[length - 1] == 0x01)
                  *frags = 3;
            return -1;
      }

      return c;
}

void av7110_p2t_write(u8 const *buf, long int length, u16 pid, struct av7110_p2t *p)
{
      int c, c2, l, add;
      int check, rest;

      c = 0;
      c2 = 0;
      if (p->frags){
            check = 0;
            switch(p->frags) {
            case 1:
                  if (buf[c] == 0x00 && buf[c + 1] == 0x01) {
                        check = 1;
                        c += 2;
                  }
                  break;
            case 2:
                  if (buf[c] == 0x01) {
                        check = 1;
                        c++;
                  }
                  break;
            case 3:
                  check = 1;
            }
            if (check) {
                  switch (buf[c]) {
                  case PROG_STREAM_MAP:
                  case PRIVATE_STREAM2:
                  case PROG_STREAM_DIR:
                  case ECM_STREAM     :
                  case EMM_STREAM     :
                  case PADDING_STREAM :
                  case DSM_CC_STREAM  :
                  case ISO13522_STREAM:
                  case PRIVATE_STREAM1:
                  case AUDIO_STREAM_S ... AUDIO_STREAM_E:
                  case VIDEO_STREAM_S ... VIDEO_STREAM_E:
                        p->pes[0] = 0x00;
                        p->pes[1] = 0x00;
                        p->pes[2] = 0x01;
                        p->pes[3] = buf[c];
                        p->pos = 4;
                        memcpy(p->pes + p->pos, buf + c, (TS_SIZE - 4) - p->pos);
                        c += (TS_SIZE - 4) - p->pos;
                        p_to_t(p->pes, (TS_SIZE - 4), pid, &p->counter, p->feed);
                        clear_p2t(p);
                        break;

                  default:
                        c = 0;
                        break;
                  }
            }
            p->frags = 0;
      }

      if (p->pos) {
            c2 = find_pes_header(buf + c, length - c, &p->frags);
            if (c2 >= 0 && c2 < (TS_SIZE - 4) - p->pos)
                  l = c2+c;
            else
                  l = (TS_SIZE - 4) - p->pos;
            memcpy(p->pes + p->pos, buf, l);
            c += l;
            p->pos += l;
            p_to_t(p->pes, p->pos, pid, &p->counter, p->feed);
            clear_p2t(p);
      }

      add = 0;
      while (c < length) {
            c2 = find_pes_header(buf + c + add, length - c - add, &p->frags);
            if (c2 >= 0) {
                  c2 += c + add;
                  if (c2 > c){
                        p_to_t(buf + c, c2 - c, pid, &p->counter, p->feed);
                        c = c2;
                        clear_p2t(p);
                        add = 0;
                  } else
                        add = 1;
            } else {
                  l = length - c;
                  rest = l % (TS_SIZE - 4);
                  l -= rest;
                  p_to_t(buf + c, l, pid, &p->counter, p->feed);
                  memcpy(p->pes, buf + c + l, rest);
                  p->pos = rest;
                  c = length;
            }
      }
}


static int write_ts_header2(u16 pid, u8 *counter, int pes_start, u8 *buf, u8 length)
{
      int i;
      int c = 0;
      int fill;
      u8 tshead[4] = { 0x47, 0x00, 0x00, 0x10 };

      fill = (TS_SIZE - 4) - length;
      if (pes_start)
            tshead[1] = 0x40;
      if (fill)
            tshead[3] = 0x30;
      tshead[1] |= (u8)((pid & 0x1F00) >> 8);
      tshead[2] |= (u8)(pid & 0x00FF);
      tshead[3] |= ((*counter)++ & 0x0F);
      memcpy(buf, tshead, 4);
      c += 4;

      if (fill) {
            buf[4] = fill - 1;
            c++;
            if (fill > 1) {
                  buf[5] = 0x00;
                  c++;
            }
            for (i = 6; i < fill + 4; i++) {
                  buf[i] = 0xFF;
                  c++;
            }
      }

      return c;
}


static void p_to_t(u8 const *buf, long int length, u16 pid, u8 *counter,
               struct dvb_demux_feed *feed)
{
      int l, pes_start;
      u8 obuf[TS_SIZE];
      long c = 0;

      pes_start = 0;
      if (length > 3 &&
           buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0x01)
            switch (buf[3]) {
                  case PROG_STREAM_MAP:
                  case PRIVATE_STREAM2:
                  case PROG_STREAM_DIR:
                  case ECM_STREAM     :
                  case EMM_STREAM     :
                  case PADDING_STREAM :
                  case DSM_CC_STREAM  :
                  case ISO13522_STREAM:
                  case PRIVATE_STREAM1:
                  case AUDIO_STREAM_S ... AUDIO_STREAM_E:
                  case VIDEO_STREAM_S ... VIDEO_STREAM_E:
                        pes_start = 1;
                        break;

                  default:
                        break;
            }

      while (c < length) {
            memset(obuf, 0, TS_SIZE);
            if (length - c >= (TS_SIZE - 4)){
                  l = write_ts_header2(pid, counter, pes_start,
                                   obuf, (TS_SIZE - 4));
                  memcpy(obuf + l, buf + c, TS_SIZE - l);
                  c += TS_SIZE - l;
            } else {
                  l = write_ts_header2(pid, counter, pes_start,
                                   obuf, length - c);
                  memcpy(obuf + l, buf + c, TS_SIZE - l);
                  c = length;
            }
            feed->cb.ts(obuf, 188, NULL, 0, &feed->feed.ts, DMX_OK);
            pes_start = 0;
      }
}


int av7110_write_to_decoder(struct dvb_demux_feed *feed, const u8 *buf, size_t len)
{
      struct dvb_demux *demux = feed->demux;
      struct av7110 *av7110 = (struct av7110 *) demux->priv;
      struct ipack *ipack = &av7110->ipack[feed->pes_type];

      dprintk(2, "av7110:%p, \n", av7110);

      switch (feed->pes_type) {
      case 0:
            if (av7110->audiostate.stream_source == AUDIO_SOURCE_MEMORY)
                  return -EINVAL;
            break;
      case 1:
            if (av7110->videostate.stream_source == VIDEO_SOURCE_MEMORY)
                  return -EINVAL;
            break;
      default:
            return -1;
      }

      if (!(buf[3] & 0x10)) /* no payload? */
            return -1;
      if (buf[1] & 0x40)
            av7110_ipack_flush(ipack);

      if (buf[3] & 0x20) {  /* adaptation field? */
            len -= buf[4] + 1;
            buf += buf[4] + 1;
            if (!len)
                  return 0;
      }

      av7110_ipack_instant_repack(buf + 4, len - 4, &av7110->ipack[feed->pes_type]);
      return 0;
}



/******************************************************************************
 * Video MPEG decoder events
 ******************************************************************************/
void dvb_video_add_event(struct av7110 *av7110, struct video_event *event)
{
      struct dvb_video_events *events = &av7110->video_events;
      int wp;

      spin_lock_bh(&events->lock);

      wp = (events->eventw + 1) % MAX_VIDEO_EVENT;
      if (wp == events->eventr) {
            events->overflow = 1;
            events->eventr = (events->eventr + 1) % MAX_VIDEO_EVENT;
      }

      //FIXME: timestamp?
      memcpy(&events->events[events->eventw], event, sizeof(struct video_event));
      events->eventw = wp;

      spin_unlock_bh(&events->lock);

      wake_up_interruptible(&events->wait_queue);
}


static int dvb_video_get_event (struct av7110 *av7110, struct video_event *event, int flags)
{
      struct dvb_video_events *events = &av7110->video_events;

      if (events->overflow) {
            events->overflow = 0;
            return -EOVERFLOW;
      }
      if (events->eventw == events->eventr) {
            int ret;

            if (flags & O_NONBLOCK)
                  return -EWOULDBLOCK;

            ret = wait_event_interruptible(events->wait_queue,
                                     events->eventw != events->eventr);
            if (ret < 0)
                  return ret;
      }

      spin_lock_bh(&events->lock);

      memcpy(event, &events->events[events->eventr],
             sizeof(struct video_event));
      events->eventr = (events->eventr + 1) % MAX_VIDEO_EVENT;

      spin_unlock_bh(&events->lock);

      return 0;
}


/******************************************************************************
 * DVB device file operations
 ******************************************************************************/

static unsigned int dvb_video_poll(struct file *file, poll_table *wait)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;
      unsigned int mask = 0;

      dprintk(2, "av7110:%p, \n", av7110);

      if ((file->f_flags & O_ACCMODE) != O_RDONLY)
            poll_wait(file, &av7110->avout.queue, wait);

      poll_wait(file, &av7110->video_events.wait_queue, wait);

      if (av7110->video_events.eventw != av7110->video_events.eventr)
            mask = POLLPRI;

      if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
            if (av7110->playing) {
                  if (FREE_COND)
                        mask |= (POLLOUT | POLLWRNORM);
                  } else /* if not playing: may play if asked for */
                        mask |= (POLLOUT | POLLWRNORM);
      }

      return mask;
}

static ssize_t dvb_video_write(struct file *file, const char __user *buf,
                         size_t count, loff_t *ppos)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;

      dprintk(2, "av7110:%p, \n", av7110);

      if ((file->f_flags & O_ACCMODE) == O_RDONLY)
            return -EPERM;

      if (av7110->videostate.stream_source != VIDEO_SOURCE_MEMORY)
            return -EPERM;

      return dvb_play(av7110, buf, count, file->f_flags & O_NONBLOCK, 1);
}

static unsigned int dvb_audio_poll(struct file *file, poll_table *wait)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;
      unsigned int mask = 0;

      dprintk(2, "av7110:%p, \n", av7110);

      poll_wait(file, &av7110->aout.queue, wait);

      if (av7110->playing) {
            if (dvb_ringbuffer_free(&av7110->aout) >= 20 * 1024)
                  mask |= (POLLOUT | POLLWRNORM);
      } else /* if not playing: may play if asked for */
            mask = (POLLOUT | POLLWRNORM);

      return mask;
}

static ssize_t dvb_audio_write(struct file *file, const char __user *buf,
                         size_t count, loff_t *ppos)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;

      dprintk(2, "av7110:%p, \n", av7110);

      if (av7110->audiostate.stream_source != AUDIO_SOURCE_MEMORY) {
            printk(KERN_ERR "not audio source memory\n");
            return -EPERM;
      }
      return dvb_aplay(av7110, buf, count, file->f_flags & O_NONBLOCK, 0);
}

static u8 iframe_header[] = { 0x00, 0x00, 0x01, 0xe0, 0x00, 0x00, 0x80, 0x00, 0x00 };

#define MIN_IFRAME 400000

static int play_iframe(struct av7110 *av7110, char __user *buf, unsigned int len, int nonblock)
{
      int i, n;

      dprintk(2, "av7110:%p, \n", av7110);

      if (!(av7110->playing & RP_VIDEO)) {
            if (av7110_av_start_play(av7110, RP_VIDEO) < 0)
                  return -EBUSY;
      }

      /* setting n always > 1, fixes problems when playing stillframes
         consisting of I- and P-Frames */
      n = MIN_IFRAME / len + 1;

      /* FIXME: nonblock? */
      dvb_play_kernel(av7110, iframe_header, sizeof(iframe_header), 0, 1);

      for (i = 0; i < n; i++)
            dvb_play(av7110, buf, len, 0, 1);

      av7110_ipack_flush(&av7110->ipack[1]);
      return 0;
}


static int dvb_video_ioctl(struct inode *inode, struct file *file,
                     unsigned int cmd, void *parg)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;
      unsigned long arg = (unsigned long) parg;
      int ret = 0;

      dprintk(1, "av7110:%p, cmd=%04x\n", av7110,cmd);

      if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
            if ( cmd != VIDEO_GET_STATUS && cmd != VIDEO_GET_EVENT &&
                 cmd != VIDEO_GET_SIZE ) {
                  return -EPERM;
            }
      }

      switch (cmd) {
      case VIDEO_STOP:
            av7110->videostate.play_state = VIDEO_STOPPED;
            if (av7110->videostate.stream_source == VIDEO_SOURCE_MEMORY)
                  ret = av7110_av_stop(av7110, RP_VIDEO);
            else
                  ret = vidcom(av7110, AV_VIDEO_CMD_STOP,
                         av7110->videostate.video_blank ? 0 : 1);
            if (!ret)
                  av7110->trickmode = TRICK_NONE;
            break;

      case VIDEO_PLAY:
            av7110->trickmode = TRICK_NONE;
            if (av7110->videostate.play_state == VIDEO_FREEZED) {
                  av7110->videostate.play_state = VIDEO_PLAYING;
                  ret = vidcom(av7110, AV_VIDEO_CMD_PLAY, 0);
                  if (ret)
                        break;
            }

            if (av7110->videostate.stream_source == VIDEO_SOURCE_MEMORY) {
                  if (av7110->playing == RP_AV) {
                        ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Stop, 0);
                        if (ret)
                              break;
                        av7110->playing &= ~RP_VIDEO;
                  }
                  ret = av7110_av_start_play(av7110, RP_VIDEO);
            }
            if (!ret)
                  ret = vidcom(av7110, AV_VIDEO_CMD_PLAY, 0);
            if (!ret)
                  av7110->videostate.play_state = VIDEO_PLAYING;
            break;

      case VIDEO_FREEZE:
            av7110->videostate.play_state = VIDEO_FREEZED;
            if (av7110->playing & RP_VIDEO)
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Pause, 0);
            else
                  ret = vidcom(av7110, AV_VIDEO_CMD_FREEZE, 1);
            if (!ret)
                  av7110->trickmode = TRICK_FREEZE;
            break;

      case VIDEO_CONTINUE:
            if (av7110->playing & RP_VIDEO)
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Continue, 0);
            if (!ret)
                  ret = vidcom(av7110, AV_VIDEO_CMD_PLAY, 0);
            if (!ret) {
                  av7110->videostate.play_state = VIDEO_PLAYING;
                  av7110->trickmode = TRICK_NONE;
            }
            break;

      case VIDEO_SELECT_SOURCE:
            av7110->videostate.stream_source = (video_stream_source_t) arg;
            break;

      case VIDEO_SET_BLANK:
            av7110->videostate.video_blank = (int) arg;
            break;

      case VIDEO_GET_STATUS:
            memcpy(parg, &av7110->videostate, sizeof(struct video_status));
            break;

      case VIDEO_GET_EVENT:
            ret = dvb_video_get_event(av7110, parg, file->f_flags);
            break;

      case VIDEO_GET_SIZE:
            memcpy(parg, &av7110->video_size, sizeof(video_size_t));
            break;

      case VIDEO_SET_DISPLAY_FORMAT:
      {
            video_displayformat_t format = (video_displayformat_t) arg;

            switch (format) {
            case VIDEO_PAN_SCAN:
                  av7110->display_panscan = VID_PAN_SCAN_PREF;
                  break;

            case VIDEO_LETTER_BOX:
                  av7110->display_panscan = VID_VC_AND_PS_PREF;
                  break;

            case VIDEO_CENTER_CUT_OUT:
                  av7110->display_panscan = VID_CENTRE_CUT_PREF;
                  break;

            default:
                  ret = -EINVAL;
            }
            if (ret < 0)
                  break;
            av7110->videostate.display_format = format;
            ret = av7110_fw_cmd(av7110, COMTYPE_ENCODER, SetPanScanType,
                            1, av7110->display_panscan);
            break;
      }

      case VIDEO_SET_FORMAT:
            if (arg > 1) {
                  ret = -EINVAL;
                  break;
            }
            av7110->display_ar = arg;
            ret = av7110_fw_cmd(av7110, COMTYPE_ENCODER, SetMonitorType,
                            1, (u16) arg);
            break;

      case VIDEO_STILLPICTURE:
      {
            struct video_still_picture *pic =
                  (struct video_still_picture *) parg;
            av7110->videostate.stream_source = VIDEO_SOURCE_MEMORY;
            dvb_ringbuffer_flush_spinlock_wakeup(&av7110->avout);
            ret = play_iframe(av7110, pic->iFrame, pic->size,
                          file->f_flags & O_NONBLOCK);
            break;
      }

      case VIDEO_FAST_FORWARD:
            //note: arg is ignored by firmware
            if (av7110->playing & RP_VIDEO)
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY,
                                  __Scan_I, 2, AV_PES, 0);
            else
                  ret = vidcom(av7110, AV_VIDEO_CMD_FFWD, arg);
            if (!ret) {
                  av7110->trickmode = TRICK_FAST;
                  av7110->videostate.play_state = VIDEO_PLAYING;
            }
            break;

      case VIDEO_SLOWMOTION:
            if (av7110->playing&RP_VIDEO) {
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY, __Slow, 2, 0, 0);
                  if (!ret)
                        ret = vidcom(av7110, AV_VIDEO_CMD_SLOW, arg);
            } else {
                  ret = vidcom(av7110, AV_VIDEO_CMD_PLAY, 0);
                  if (!ret)
                        ret = vidcom(av7110, AV_VIDEO_CMD_STOP, 0);
                  if (!ret)
                        ret = vidcom(av7110, AV_VIDEO_CMD_SLOW, arg);
            }
            if (!ret) {
                  av7110->trickmode = TRICK_SLOW;
                  av7110->videostate.play_state = VIDEO_PLAYING;
            }
            break;

      case VIDEO_GET_CAPABILITIES:
            *(int *)parg = VIDEO_CAP_MPEG1 | VIDEO_CAP_MPEG2 |
                  VIDEO_CAP_SYS | VIDEO_CAP_PROG;
            break;

      case VIDEO_CLEAR_BUFFER:
            dvb_ringbuffer_flush_spinlock_wakeup(&av7110->avout);
            av7110_ipack_reset(&av7110->ipack[1]);

            if (av7110->playing == RP_AV) {
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY,
                                  __Play, 2, AV_PES, 0);
                  if (ret)
                        break;
                  if (av7110->trickmode == TRICK_FAST)
                        ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY,
                                        __Scan_I, 2, AV_PES, 0);
                  if (av7110->trickmode == TRICK_SLOW) {
                        ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY,
                                        __Slow, 2, 0, 0);
                        if (!ret)
                              ret = vidcom(av7110, AV_VIDEO_CMD_SLOW, arg);
                  }
                  if (av7110->trickmode == TRICK_FREEZE)
                        ret = vidcom(av7110, AV_VIDEO_CMD_STOP, 1);
            }
            break;

      case VIDEO_SET_STREAMTYPE:

            break;

      default:
            ret = -ENOIOCTLCMD;
            break;
      }
      return ret;
}

static int dvb_audio_ioctl(struct inode *inode, struct file *file,
                     unsigned int cmd, void *parg)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;
      unsigned long arg = (unsigned long) parg;
      int ret = 0;

      dprintk(1, "av7110:%p, cmd=%04x\n", av7110,cmd);

      if (((file->f_flags & O_ACCMODE) == O_RDONLY) &&
          (cmd != AUDIO_GET_STATUS))
            return -EPERM;

      switch (cmd) {
      case AUDIO_STOP:
            if (av7110->audiostate.stream_source == AUDIO_SOURCE_MEMORY)
                  ret = av7110_av_stop(av7110, RP_AUDIO);
            else
                  ret = audcom(av7110, AUDIO_CMD_MUTE);
            if (!ret)
                  av7110->audiostate.play_state = AUDIO_STOPPED;
            break;

      case AUDIO_PLAY:
            if (av7110->audiostate.stream_source == AUDIO_SOURCE_MEMORY)
                  ret = av7110_av_start_play(av7110, RP_AUDIO);
            if (!ret)
                  ret = audcom(av7110, AUDIO_CMD_UNMUTE);
            if (!ret)
                  av7110->audiostate.play_state = AUDIO_PLAYING;
            break;

      case AUDIO_PAUSE:
            ret = audcom(av7110, AUDIO_CMD_MUTE);
            if (!ret)
                  av7110->audiostate.play_state = AUDIO_PAUSED;
            break;

      case AUDIO_CONTINUE:
            if (av7110->audiostate.play_state == AUDIO_PAUSED) {
                  av7110->audiostate.play_state = AUDIO_PLAYING;
                  ret = audcom(av7110, AUDIO_CMD_UNMUTE | AUDIO_CMD_PCM16);
            }
            break;

      case AUDIO_SELECT_SOURCE:
            av7110->audiostate.stream_source = (audio_stream_source_t) arg;
            break;

      case AUDIO_SET_MUTE:
      {
            ret = audcom(av7110, arg ? AUDIO_CMD_MUTE : AUDIO_CMD_UNMUTE);
            if (!ret)
                  av7110->audiostate.mute_state = (int) arg;
            break;
      }

      case AUDIO_SET_AV_SYNC:
            av7110->audiostate.AV_sync_state = (int) arg;
            ret = audcom(av7110, arg ? AUDIO_CMD_SYNC_ON : AUDIO_CMD_SYNC_OFF);
            break;

      case AUDIO_SET_BYPASS_MODE:
            if (FW_VERSION(av7110->arm_app) < 0x2621)
                  ret = -EINVAL;
            av7110->audiostate.bypass_mode = (int)arg;
            break;

      case AUDIO_CHANNEL_SELECT:
            av7110->audiostate.channel_select = (audio_channel_select_t) arg;

            switch(av7110->audiostate.channel_select) {
            case AUDIO_STEREO:
                  ret = audcom(av7110, AUDIO_CMD_STEREO);
                  if (!ret) {
                        if (av7110->adac_type == DVB_ADAC_CRYSTAL)
                              i2c_writereg(av7110, 0x20, 0x02, 0x49);
                        else if (av7110->adac_type == DVB_ADAC_MSP34x5)
                              msp_writereg(av7110, MSP_WR_DSP, 0x0008, 0x0220);
                  }
                  break;

            case AUDIO_MONO_LEFT:
                  ret = audcom(av7110, AUDIO_CMD_MONO_L);
                  if (!ret) {
                        if (av7110->adac_type == DVB_ADAC_CRYSTAL)
                              i2c_writereg(av7110, 0x20, 0x02, 0x4a);
                        else if (av7110->adac_type == DVB_ADAC_MSP34x5)
                              msp_writereg(av7110, MSP_WR_DSP, 0x0008, 0x0200);
                  }
                  break;

            case AUDIO_MONO_RIGHT:
                  ret = audcom(av7110, AUDIO_CMD_MONO_R);
                  if (!ret) {
                        if (av7110->adac_type == DVB_ADAC_CRYSTAL)
                              i2c_writereg(av7110, 0x20, 0x02, 0x45);
                        else if (av7110->adac_type == DVB_ADAC_MSP34x5)
                              msp_writereg(av7110, MSP_WR_DSP, 0x0008, 0x0210);
                  }
                  break;

            default:
                  ret = -EINVAL;
                  break;
            }
            break;

      case AUDIO_GET_STATUS:
            memcpy(parg, &av7110->audiostate, sizeof(struct audio_status));
            break;

      case AUDIO_GET_CAPABILITIES:
            if (FW_VERSION(av7110->arm_app) < 0x2621)
                  *(unsigned int *)parg = AUDIO_CAP_LPCM | AUDIO_CAP_MP1 | AUDIO_CAP_MP2;
            else
                  *(unsigned int *)parg = AUDIO_CAP_LPCM | AUDIO_CAP_DTS | AUDIO_CAP_AC3 |
                                    AUDIO_CAP_MP1 | AUDIO_CAP_MP2;
            break;

      case AUDIO_CLEAR_BUFFER:
            dvb_ringbuffer_flush_spinlock_wakeup(&av7110->aout);
            av7110_ipack_reset(&av7110->ipack[0]);
            if (av7110->playing == RP_AV)
                  ret = av7110_fw_cmd(av7110, COMTYPE_REC_PLAY,
                                  __Play, 2, AV_PES, 0);
            break;
      case AUDIO_SET_ID:

            break;
      case AUDIO_SET_MIXER:
      {
            struct audio_mixer *amix = (struct audio_mixer *)parg;

            ret = av7110_set_volume(av7110, amix->volume_left, amix->volume_right);
            break;
      }
      case AUDIO_SET_STREAMTYPE:
            break;
      default:
            ret = -ENOIOCTLCMD;
      }
      return ret;
}


static int dvb_video_open(struct inode *inode, struct file *file)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;
      int err;

      dprintk(2, "av7110:%p, \n", av7110);

      if ((err = dvb_generic_open(inode, file)) < 0)
            return err;

      if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
            dvb_ringbuffer_flush_spinlock_wakeup(&av7110->aout);
            dvb_ringbuffer_flush_spinlock_wakeup(&av7110->avout);
            av7110->video_blank = 1;
            av7110->audiostate.AV_sync_state = 1;
            av7110->videostate.stream_source = VIDEO_SOURCE_DEMUX;

            /*  empty event queue */
            av7110->video_events.eventr = av7110->video_events.eventw = 0;
      }

      return 0;
}

static int dvb_video_release(struct inode *inode, struct file *file)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;

      dprintk(2, "av7110:%p, \n", av7110);

      if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
            av7110_av_stop(av7110, RP_VIDEO);
      }

      return dvb_generic_release(inode, file);
}

static int dvb_audio_open(struct inode *inode, struct file *file)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;
      int err = dvb_generic_open(inode, file);

      dprintk(2, "av7110:%p, \n", av7110);

      if (err < 0)
            return err;
      dvb_ringbuffer_flush_spinlock_wakeup(&av7110->aout);
      av7110->audiostate.stream_source = AUDIO_SOURCE_DEMUX;
      return 0;
}

static int dvb_audio_release(struct inode *inode, struct file *file)
{
      struct dvb_device *dvbdev = file->private_data;
      struct av7110 *av7110 = dvbdev->priv;

      dprintk(2, "av7110:%p, \n", av7110);

      av7110_av_stop(av7110, RP_AUDIO);
      return dvb_generic_release(inode, file);
}



/******************************************************************************
 * driver registration
 ******************************************************************************/

static struct file_operations dvb_video_fops = {
      .owner            = THIS_MODULE,
      .write            = dvb_video_write,
      .ioctl            = dvb_generic_ioctl,
      .open       = dvb_video_open,
      .release    = dvb_video_release,
      .poll       = dvb_video_poll,
};

static struct dvb_device dvbdev_video = {
      .priv       = NULL,
      .users            = 6,
      .readers    = 5,  /* arbitrary */
      .writers    = 1,
      .fops       = &dvb_video_fops,
      .kernel_ioctl     = dvb_video_ioctl,
};

static struct file_operations dvb_audio_fops = {
      .owner            = THIS_MODULE,
      .write            = dvb_audio_write,
      .ioctl            = dvb_generic_ioctl,
      .open       = dvb_audio_open,
      .release    = dvb_audio_release,
      .poll       = dvb_audio_poll,
};

static struct dvb_device dvbdev_audio = {
      .priv       = NULL,
      .users            = 1,
      .writers    = 1,
      .fops       = &dvb_audio_fops,
      .kernel_ioctl     = dvb_audio_ioctl,
};


int av7110_av_register(struct av7110 *av7110)
{
      av7110->audiostate.AV_sync_state = 0;
      av7110->audiostate.mute_state = 0;
      av7110->audiostate.play_state = AUDIO_STOPPED;
      av7110->audiostate.stream_source = AUDIO_SOURCE_DEMUX;
      av7110->audiostate.channel_select = AUDIO_STEREO;
      av7110->audiostate.bypass_mode = 0;

      av7110->videostate.video_blank = 0;
      av7110->videostate.play_state = VIDEO_STOPPED;
      av7110->videostate.stream_source = VIDEO_SOURCE_DEMUX;
      av7110->videostate.video_format = VIDEO_FORMAT_4_3;
      av7110->videostate.display_format = VIDEO_LETTER_BOX;
      av7110->display_ar = VIDEO_FORMAT_4_3;
      av7110->display_panscan = VID_VC_AND_PS_PREF;

      init_waitqueue_head(&av7110->video_events.wait_queue);
      spin_lock_init(&av7110->video_events.lock);
      av7110->video_events.eventw = av7110->video_events.eventr = 0;
      av7110->video_events.overflow = 0;
      memset(&av7110->video_size, 0, sizeof (video_size_t));

      dvb_register_device(&av7110->dvb_adapter, &av7110->video_dev,
                      &dvbdev_video, av7110, DVB_DEVICE_VIDEO);

      dvb_register_device(&av7110->dvb_adapter, &av7110->audio_dev,
                      &dvbdev_audio, av7110, DVB_DEVICE_AUDIO);

      return 0;
}

void av7110_av_unregister(struct av7110 *av7110)
{
      dvb_unregister_device(av7110->audio_dev);
      dvb_unregister_device(av7110->video_dev);
}

int av7110_av_init(struct av7110 *av7110)
{
      void (*play[])(u8 *, int, void *) = { play_audio_cb, play_video_cb };
      int i, ret;

      for (i = 0; i < 2; i++) {
            struct ipack *ipack = av7110->ipack + i;

            ret = av7110_ipack_init(ipack, IPACKS, play[i]);
            if (ret < 0) {
                  if (i)
                        av7110_ipack_free(--ipack);
                  goto out;
            }
            ipack->data = av7110;
      }

      dvb_ringbuffer_init(&av7110->avout, av7110->iobuf, AVOUTLEN);
      dvb_ringbuffer_init(&av7110->aout, av7110->iobuf + AVOUTLEN, AOUTLEN);

      av7110->kbuf[0] = (u8 *)(av7110->iobuf + AVOUTLEN + AOUTLEN + BMPLEN);
      av7110->kbuf[1] = av7110->kbuf[0] + 2 * IPACKS;
out:
      return ret;
}

void av7110_av_exit(struct av7110 *av7110)
{
      av7110_ipack_free(&av7110->ipack[0]);
      av7110_ipack_free(&av7110->ipack[1]);
}

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