stream_pvr.c

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  if (!pvr)
    return -1;
  
  if (pvr->dev_fd < 0)
    return -1;

  /* -tv noaudio */
  if (pvr->mute)
  {
    struct v4l2_control ctrl;
    ctrl.id = V4L2_CID_AUDIO_MUTE;
    ctrl.value = 1;
    if (ioctl (pvr->dev_fd, VIDIOC_S_CTRL, &ctrl) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't mute (%s).\n", LOG_LEVEL_V4L2, strerror (errno));
      return -1;
    }
  }

  /* -tv input=x */
  if (pvr->input != 0)
  {
    if (ioctl (pvr->dev_fd, VIDIOC_S_INPUT, &pvr->input) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set input (%s)\n", LOG_LEVEL_V4L2, strerror (errno));
      return -1;
    }
  }
  
  /* -tv normid=x */
  if (pvr->normid != -1)
  {
    struct v4l2_standard std;
    std.index = pvr->normid;

    if (ioctl (pvr->dev_fd, VIDIOC_ENUMSTD, &std) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set norm (%s)\n", LOG_LEVEL_V4L2, strerror (errno));
      return -1;
    }

    mp_msg (MSGT_OPEN, MSGL_V,
            "%s set norm to %s\n", LOG_LEVEL_V4L2, std.name);

    if (ioctl (pvr->dev_fd, VIDIOC_S_STD, &std.id) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set norm (%s)\n", LOG_LEVEL_V4L2, strerror (errno));
      return -1;
    }
  }
  
  /* -tv brightness=x */
  if (pvr->brightness != 0)
  {
    struct v4l2_control ctrl;
    ctrl.id = V4L2_CID_BRIGHTNESS;
    ctrl.value = pvr->brightness;

    if (ctrl.value < 0)
      ctrl.value = 0;
    if (ctrl.value > 255)
      ctrl.value = 255;
    
    if (ioctl (pvr->dev_fd, VIDIOC_S_CTRL, &ctrl) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set brightness to %d (%s).\n",
              LOG_LEVEL_V4L2, ctrl.value, strerror (errno));
      return -1;
    }
  }

  /* -tv contrast=x */
  if (pvr->contrast != 0)
  {
    struct v4l2_control ctrl;
    ctrl.id = V4L2_CID_CONTRAST;
    ctrl.value = pvr->contrast;

    if (ctrl.value < 0)
      ctrl.value = 0;
    if (ctrl.value > 127)
      ctrl.value = 127;
    
    if (ioctl (pvr->dev_fd, VIDIOC_S_CTRL, &ctrl) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set contrast to %d (%s).\n",
              LOG_LEVEL_V4L2, ctrl.value, strerror (errno));
      return -1;
    }
  }

  /* -tv hue=x */
  if (pvr->hue != 0)
  {
    struct v4l2_control ctrl;
    ctrl.id = V4L2_CID_HUE;
    ctrl.value = pvr->hue;

    if (ctrl.value < -128)
      ctrl.value = -128;
    if (ctrl.value > 127)
      ctrl.value = 127;
    
    if (ioctl (pvr->dev_fd, VIDIOC_S_CTRL, &ctrl) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set hue to %d (%s).\n",
              LOG_LEVEL_V4L2, ctrl.value, strerror (errno));
      return -1;
    }
  }
  
  /* -tv saturation=x */
  if (pvr->saturation != 0)
  {
    struct v4l2_control ctrl;
    ctrl.id = V4L2_CID_SATURATION;
    ctrl.value = pvr->saturation;

    if (ctrl.value < 0)
      ctrl.value = 0;
    if (ctrl.value > 127)
      ctrl.value = 127;
    
    if (ioctl (pvr->dev_fd, VIDIOC_S_CTRL, &ctrl) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set saturation to %d (%s).\n",
              LOG_LEVEL_V4L2, ctrl.value, strerror (errno));
      return -1;
    }
  }
  
  /* -tv width=x:height=y */
  if (pvr->width && pvr->height)
  {
    struct v4l2_format vfmt;
    vfmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
    vfmt.fmt.pix.width = pvr->width;
    vfmt.fmt.pix.height = pvr->height;

    if (ioctl (pvr->dev_fd, VIDIOC_S_FMT, &vfmt) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't set resolution to %dx%d (%s).\n",
              LOG_LEVEL_V4L2, pvr->width, pvr->height, strerror (errno));
      return -1;
    }
  }

  if (pvr->freq < 0)
  {
    int freq = get_v4l2_freq (pvr);
    mp_msg (MSGT_OPEN, MSGL_INFO,
            "%s Using current set frequency %d, to set channel\n",
            LOG_LEVEL_V4L2, freq);

    if (0 < freq)
      return set_station_by_channelname_or_freq (pvr, NULL, freq, 1);
  }

  if (0 < pvr->freq)
    return set_v4l2_freq (pvr) ;
  
  return 0;
}

static int
v4l2_list_capabilities (struct pvr_t *pvr)
{
  struct v4l2_audio vaudio;
  struct v4l2_standard vs;
  struct v4l2_input vin;
  int err = 0;
  
  if (!pvr)
    return -1;

  if (pvr->dev_fd < 0)
    return -1;
  
  /* list available video inputs */
  vin.index = 0;
  err = 1;
  mp_msg (MSGT_OPEN, MSGL_INFO,
          "%s Available video inputs: ", LOG_LEVEL_V4L2);
  while (ioctl (pvr->dev_fd, VIDIOC_ENUMINPUT, &vin) >= 0)
  {
    err = 0;
    mp_msg (MSGT_OPEN, MSGL_INFO, "'#%d, %s' ", vin.index, vin.name);
    vin.index++;
  }
  if (err)
  {
    mp_msg (MSGT_OPEN, MSGL_INFO, "none\n");
    return -1;
  }
  else
    mp_msg (MSGT_OPEN, MSGL_INFO, "\n");

  /* list available audio inputs */
  vaudio.index = 0;
  err = 1;
  mp_msg (MSGT_OPEN, MSGL_INFO,
          "%s Available audio inputs: ", LOG_LEVEL_V4L2);
  while (ioctl (pvr->dev_fd, VIDIOC_ENUMAUDIO, &vaudio) >= 0)
  {
    err = 0;
    mp_msg (MSGT_OPEN, MSGL_INFO, "'#%d, %s' ", vaudio.index, vaudio.name);
    vaudio.index++;
  }
  if (err)
  {
    mp_msg (MSGT_OPEN, MSGL_INFO, "none\n");
    return -1;
  }
  else
    mp_msg (MSGT_OPEN, MSGL_INFO, "\n");

  /* list available norms */
  vs.index = 0;
  mp_msg (MSGT_OPEN, MSGL_INFO, "%s Available norms: ", LOG_LEVEL_V4L2);
  while (ioctl (pvr->dev_fd, VIDIOC_ENUMSTD, &vs) >= 0)
  {
    err = 0;
    mp_msg (MSGT_OPEN, MSGL_INFO, "'#%d, %s' ", vs.index, vs.name);
    vs.index++;
  }
  if (err)
  {
    mp_msg (MSGT_OPEN, MSGL_INFO, "none\n");
    return -1;
  }
  else
    mp_msg (MSGT_OPEN, MSGL_INFO, "\n");

  return 0;
}

static int
v4l2_display_settings (struct pvr_t *pvr)
{
  struct v4l2_audio vaudio;
  struct v4l2_standard vs;
  struct v4l2_input vin;
  v4l2_std_id std;
  int input;
  
  if (!pvr)
    return -1;

  if (pvr->dev_fd < 0)
    return -1;

  /* get current video input */
  if (ioctl (pvr->dev_fd, VIDIOC_G_INPUT, &input) == 0)
  {
    vin.index = input;
    if (ioctl (pvr->dev_fd, VIDIOC_ENUMINPUT, &vin) < 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s can't get input (%s).\n", LOG_LEVEL_V4L2, strerror (errno));
      return -1;
    }
    else
      mp_msg (MSGT_OPEN, MSGL_INFO,
              "%s Video input: %s\n", LOG_LEVEL_V4L2, vin.name);
  }
  else
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't get input (%s).\n", LOG_LEVEL_V4L2, strerror (errno));
    return -1;
  }

  /* get current audio input */
  if (ioctl (pvr->dev_fd, VIDIOC_G_AUDIO, &vaudio) == 0)
  {
    mp_msg (MSGT_OPEN, MSGL_INFO,
            "%s Audio input: %s\n", LOG_LEVEL_V4L2, vaudio.name);
  }
  else
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't get input (%s).\n", LOG_LEVEL_V4L2, strerror (errno));
    return -1;
  }

  /* get current video format */
  if (ioctl (pvr->dev_fd, VIDIOC_G_STD, &std) == 0)
  {
    vs.index = 0;

    while (ioctl (pvr->dev_fd, VIDIOC_ENUMSTD, &vs) >= 0)
    {
      if (vs.id == std)
      {
        mp_msg (MSGT_OPEN, MSGL_INFO,
                "%s Norm: %s.\n", LOG_LEVEL_V4L2, vs.name);
        break;
      }
      vs.index++;
    }
  }
  else
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't get norm (%s)\n", LOG_LEVEL_V4L2, strerror (errno));
    return -1;
  }

  return 0;
}

/* stream layer */

static void
pvr_stream_close (stream_t *stream)
{
  struct pvr_t *pvr;

  if (!stream)
    return;
  
  pvr = (struct pvr_t *) stream->priv;
  pvr_uninit (pvr);
}

static int
pvr_stream_read (stream_t *stream, char *buffer, int size)
{
  struct pollfd pfds[1];
  struct pvr_t *pvr;
  int rk, fd, pos;

  if (!stream || !buffer)
    return 0;
  
  pvr = (struct pvr_t *) stream->priv;
  fd = pvr->dev_fd;
  pos = 0;

  if (fd < 0)
    return 0;
  
  while (pos < size)
  {
    pfds[0].fd = fd;
    pfds[0].events = POLLIN | POLLPRI;

    rk = size - pos;

    if (poll (pfds, 1, 500) <= 0)
    {
      mp_msg (MSGT_OPEN, MSGL_ERR,
              "%s failed with errno %d when reading %d bytes\n",
              LOG_LEVEL_PVR, errno, size-pos);
      break;
    }

    rk = read (fd, &buffer[pos], rk);
    if (rk > 0)
    {
      pos += rk;
      mp_msg (MSGT_OPEN, MSGL_DBG3,
              "%s read (%d) bytes\n", LOG_LEVEL_PVR, pos);
    }
  }
		
  if (!pos)
    mp_msg (MSGT_OPEN, MSGL_ERR, "%s read %d bytes\n", LOG_LEVEL_PVR, pos);

  return pos;
}

static int
pvr_stream_open (stream_t *stream, int mode, void *opts, int *file_format)
{
  struct v4l2_capability vcap;
  struct v4l2_ext_controls ctrls;
  struct pvr_t *pvr = NULL;
  
  if (mode != STREAM_READ)
    return STREAM_UNSUPPORTED;
  
  pvr = pvr_init ();

  /**
   * if the url, i.e. 'pvr://8', contains the channel, use it,
   * else use the tv parameter.
   */
  if (stream->url && strlen (stream->url) > 6 && stream->url[6] != '\0')
    pvr->param_channel = strdup (stream->url + 6);
  else if (stream_tv_defaults.channel && strlen (stream_tv_defaults.channel))
    pvr->param_channel = strdup (stream_tv_defaults.channel);
  
  parse_v4l2_tv_options (pvr);
  parse_encoder_options (pvr);
  
  /* open device */
  pvr->dev_fd = open (pvr->video_dev, O_RDWR);
  mp_msg (MSGT_OPEN, MSGL_INFO,
          "%s Using device %s\n", LOG_LEVEL_PVR, pvr->video_dev);
  if (pvr->dev_fd == -1)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s error opening device %s\n", LOG_LEVEL_PVR, pvr->video_dev);
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }
  
  /* query capabilities (i.e test V4L2 support) */
  if (ioctl (pvr->dev_fd, VIDIOC_QUERYCAP, &vcap) < 0)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s device is not V4L2 compliant (%s).\n",
            LOG_LEVEL_PVR, strerror (errno));
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }
  else
    mp_msg (MSGT_OPEN, MSGL_INFO,
            "%s Detected %s\n", LOG_LEVEL_PVR, vcap.card);

  /* check for a valid V4L2 capture device */
  if (!(vcap.capabilities & V4L2_CAP_VIDEO_CAPTURE))
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s device is not a valid V4L2 capture device.\n",
            LOG_LEVEL_PVR);
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }

  /* check for device hardware MPEG encoding capability */
  ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG; 
  ctrls.count = 0; 
  ctrls.controls = NULL;
  
  if (ioctl (pvr->dev_fd, VIDIOC_G_EXT_CTRLS, &ctrls) < 0)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s device do not support MPEG input.\n", LOG_LEVEL_ENCODER);
    return STREAM_ERROR;
  }

  /* list V4L2 capabilities */
  if (v4l2_list_capabilities (pvr) == -1)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't get v4l2 capabilities\n", LOG_LEVEL_PVR);
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }
  
  /* apply V4L2 settings */
  if (set_v4l2_settings (pvr) == -1)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't set v4l2 settings\n", LOG_LEVEL_PVR);
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }

  /* apply encoder settings */
  if (set_encoder_settings (pvr) == -1)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't set encoder settings\n", LOG_LEVEL_PVR);
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }
  
  /* display current V4L2 settings */
  if (v4l2_display_settings (pvr) == -1)
  {
    mp_msg (MSGT_OPEN, MSGL_ERR,
            "%s can't get v4l2 settings\n", LOG_LEVEL_PVR);
    pvr_uninit (pvr);
    return STREAM_ERROR;
  }

  stream->priv = pvr;
  stream->type = STREAMTYPE_PVR;
  stream->fill_buffer = pvr_stream_read;
  stream->close = pvr_stream_close;
  
  return STREAM_OK;
}

/* PVR Public API access */

const char *
pvr_get_current_stationname (stream_t *stream)
{
  struct pvr_t *pvr;

  if (!stream || stream->type != STREAMTYPE_PVR)
    return NULL;
  
  pvr = (struct pvr_t *) stream->priv;

  if (pvr->stationlist.list &&
      pvr->stationlist.used > pvr->chan_idx &&
      pvr->chan_idx >= 0)
    return pvr->stationlist.list[pvr->chan_idx].station;

  return NULL;
}

const char *
pvr_get_current_channelname (stream_t *stream)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  if (pvr->stationlist.list &&
      pvr->stationlist.used > pvr->chan_idx &&
      pvr->chan_idx >= 0)
    return pvr->stationlist.list[pvr->chan_idx].name;

  return NULL;
}

int
pvr_get_current_frequency (stream_t *stream)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  return pvr->freq;
}

int
pvr_set_channel (stream_t *stream, const char * channel)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  return set_station_by_channelname_or_freq (pvr, channel, -1, 1);
}

int
pvr_set_lastchannel (stream_t *stream)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  if (pvr->stationlist.list &&
      pvr->stationlist.used > pvr->chan_idx_last &&
      pvr->chan_idx_last >= 0)
    return set_station_by_channelname_or_freq (pvr, pvr->stationlist.list[pvr->chan_idx_last].name, -1, 1);

  return -1;
}

int
pvr_set_freq (stream_t *stream, int freq)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  return set_station_by_channelname_or_freq (pvr, NULL, freq, 1);
}

int
pvr_set_channel_step (stream_t *stream, int step)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  return set_station_by_step (pvr, step, 1);
}

int
pvr_force_freq_step (stream_t *stream, int step)
{
  struct pvr_t *pvr = (struct pvr_t *) stream->priv;

  return force_freq_step (pvr, step);
}

stream_info_t stream_info_pvr = {
  "V4L2 MPEG Input (a.k.a PVR)",
  "pvr",
  "Benjamin Zores",
  "",
  pvr_stream_open, 			
  { "pvr", NULL },
  NULL,
  1
};