pvr.c

VLC Player Source Code

                if ( !strncmp( psz_parser_init, "vbr" ,
                               psz_parser - psz_parser_init ) )
                {
                     p_sys->i_bitrate_mode = 0;
                }
                else if ( !strncmp( psz_parser_init, "cbr" ,
                                    psz_parser - psz_parser_init ) )
                {
                    p_sys->i_bitrate_mode = 1;
                }
            }
            else if( !strncmp( psz_parser, "size=",
                               strlen( "size=" ) ) )
            {
                p_sys->i_width =
                    strtol( psz_parser + strlen( "size=" ),
                            &psz_parser, 0 );
                p_sys->i_height =
                    strtol( psz_parser + 1 ,
                            &psz_parser, 0 );
            }
            else
            {
                char *psz_parser_init;
                psz_parser_init = psz_parser;
                while ( (*psz_parser != ':') &&
                        (*psz_parser != ',') &&
                        (*psz_parser != '\0') )
                {
                    psz_parser++;
                }
                psz_device = calloc( psz_parser - psz_parser_init + 1, 1 );
                if( !psz_device )
                    return VLC_ENOMEM;

                strncpy( psz_device, psz_parser_init,
                         psz_parser - psz_parser_init );
            }
            if( *psz_parser )
                psz_parser++;
            else
                break;
        }
    }
    free( psz_tofree );

    if( psz_device )
    {
        free( p_sys->psz_videodev );
        p_sys->psz_videodev = psz_device;
    }

    /* open the device */
    p_sys->i_fd = open( p_sys->psz_videodev, O_RDWR );
    if( p_sys->i_fd < 0 )
    {
        msg_Err( p_access, "Cannot open device (%m)." );
        Close( VLC_OBJECT(p_access) );
        return VLC_EGENERIC;
    }
    msg_Dbg( p_access, "Using video device: %s.", p_sys->psz_videodev);

    /* See what version of ivtvdriver is running */
    result = ioctl( p_sys->i_fd, VIDIOC_QUERYCAP, &device_capability );
    if( result < 0 )
    {
        msg_Err( p_access, "unknown ivtv/pvr driver version in use" );
        Close( VLC_OBJECT(p_access) );
        return VLC_EGENERIC;
    }

    msg_Dbg( p_access, "%s driver (%s on %s) version %02x.%02x.%02x",
              device_capability.driver,
              device_capability.card,
              device_capability.bus_info,
            ( device_capability.version >> 16 ) & 0xff,
            ( device_capability.version >>  8 ) & 0xff,
            ( device_capability.version       ) & 0xff);

    if ( strncmp( (char *) device_capability.driver, "ivtv", 4 )
           || device_capability.version >= 0x000800 )
    {
        /* Drivers > 0.8.0 use v4l2 API instead of IVTV ioctls */
        msg_Dbg( p_access, "this driver uses the v4l2 API" );
        p_sys->b_v4l2_api = true;
    }
    else
    {
        p_sys->b_v4l2_api = false;
    }

    /* set the input */
    if ( p_sys->i_input != -1 )
    {
        result = ioctl( p_sys->i_fd, VIDIOC_S_INPUT, &p_sys->i_input );
        if ( result < 0 )
            msg_Warn( p_access, "Failed to select the requested input pin." );
        else
            msg_Dbg( p_access, "input set to: %d", p_sys->i_input );
    }

    /* set the video standard */
    if ( p_sys->i_standard != V4L2_STD_UNKNOWN )
    {
        result = ioctl( p_sys->i_fd, VIDIOC_S_STD, &p_sys->i_standard );
        if ( result  < 0 )
            msg_Warn( p_access, "Failed to set the requested video standard." );
        else
            msg_Dbg( p_access, "video standard set to: %x",
                     p_sys->i_standard);
    }

    /* set the picture size */
    if ( (p_sys->i_width != -1) || (p_sys->i_height != -1) )
    {
        struct v4l2_format vfmt;

        memset( &vfmt, 0, sizeof(struct v4l2_format) );
        vfmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

        result = ioctl( p_sys->i_fd, VIDIOC_G_FMT, &vfmt );
        if ( result < 0 )
        {
            msg_Warn( p_access, "Failed to read current picture size." );
        }
        else
        {
            if ( p_sys->i_width != -1 )
            {
                vfmt.fmt.pix.width = p_sys->i_width;
            }

            if ( p_sys->i_height != -1 )
            {
                vfmt.fmt.pix.height = p_sys->i_height;
            }

            result = ioctl( p_sys->i_fd, VIDIOC_S_FMT, &vfmt );
            if ( result < 0 )
            {
                msg_Warn( p_access, "Failed to set requested picture size." );
            }
            else
            {
                msg_Dbg( p_access, "picture size set to: %dx%d",
                         vfmt.fmt.pix.width, vfmt.fmt.pix.height );
            }
        }
    }

    /* set the frequency */
    if ( p_sys->i_frequency != -1 )
    {
        int i_fd;
        struct v4l2_tuner vt;

         /* TODO: let the user choose the tuner */
        memset( &vt, 0, sizeof(struct v4l2_tuner) );

        if ( (p_sys->i_frequency >= pi_radio_range[0])
              && (p_sys->i_frequency <= pi_radio_range[1]) )
        {
            p_sys->i_radio_fd = open( p_sys->psz_radiodev, O_RDWR );
            if( p_sys->i_radio_fd < 0 )
            {
                msg_Err( p_access, "Cannot open radio device (%m)." );
                Close( VLC_OBJECT(p_access) );
                return VLC_EGENERIC;
            }
            msg_Dbg( p_access, "using radio device: %s",
                     p_sys->psz_radiodev );
            i_fd = p_sys->i_radio_fd;
        }
        else
        {
            i_fd = p_sys->i_fd;
            p_sys->i_radio_fd = -1;
        }

        result = ioctl( i_fd, VIDIOC_G_TUNER, &vt );
        if ( result < 0 )
        {
            msg_Warn( p_access, "Failed to read tuner information (%m)." );
        }
        else
        {
            struct v4l2_frequency vf;

            memset( &vf, 0, sizeof(struct v4l2_frequency) );
            vf.tuner = vt.index;

            result = ioctl( i_fd, VIDIOC_G_FREQUENCY, &vf );
            if ( result < 0 )
            {
                msg_Warn( p_access, "Failed to read tuner frequency (%m)." );
            }
            else
            {
                if( vt.capability & V4L2_TUNER_CAP_LOW )
                    vf.frequency = p_sys->i_frequency * 16;
                else
                    vf.frequency = (p_sys->i_frequency * 16 + 500) / 1000;

                result = ioctl( i_fd, VIDIOC_S_FREQUENCY, &vf );
                if( result < 0 )
                {
                    msg_Warn( p_access, "Failed to set tuner frequency (%m)." );
                }
                else
                {
                    msg_Dbg( p_access, "tuner frequency set to: %d",
                             p_sys->i_frequency );
                }
            }
        }
    }

    /* control parameters */
    if ( p_sys->i_volume != -1 )
    {
        struct v4l2_control ctrl;

        memset( &ctrl, 0, sizeof(struct v4l2_control) );
        ctrl.id = V4L2_CID_AUDIO_VOLUME;
        ctrl.value = p_sys->i_volume;

        result = ioctl( p_sys->i_fd, VIDIOC_S_CTRL, &ctrl );
        if ( result < 0 )
        {
            msg_Warn( p_access, "Failed to set the volume." );
        }
    }

    /* codec parameters */
    if ( (p_sys->i_framerate != -1)
            || (p_sys->i_bitrate_mode != -1)
            || (p_sys->i_bitrate_peak != -1)
            || (p_sys->i_keyint != -1)
            || (p_sys->i_bframes != -1)
            || (p_sys->i_bitrate != -1)
            || (p_sys->i_audio_bitmask != -1) )
    {
        if( p_sys->b_v4l2_api )
        {
#ifdef HAVE_NEW_LINUX_VIDEODEV2_H
            result = ConfigureV4L2( p_access );
            if( result != VLC_SUCCESS )
            {
                Close( VLC_OBJECT(p_access) );
                return result;
            }
#else
            msg_Warn( p_access, "You have new ivtvdrivers, "
                      "but this vlc was built against an old v4l2 version." );
#endif
        }
        else
        {
            result = ConfigureIVTV( p_access );
            if( result != VLC_SUCCESS )
            {
                Close( VLC_OBJECT(p_access) );
                return result;
            }
        }
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Close: close the device
 *****************************************************************************/
static void Close( vlc_object_t * p_this )
{
    access_t *p_access = (access_t*) p_this;
    access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;

    if ( p_sys->i_fd != -1 )
        close( p_sys->i_fd );
    if ( p_sys->i_radio_fd != -1 )
        close( p_sys->i_radio_fd );
    free( p_sys->psz_videodev );
    free( p_sys->psz_radiodev );
    free( p_sys );
}

/*****************************************************************************
 * Read
 *****************************************************************************/
static ssize_t Read( access_t * p_access, uint8_t * p_buffer, size_t i_len )
{
    access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
    struct pollfd ufd;
    int i_ret;

    ufd.fd = p_sys->i_fd;
    ufd.events = POLLIN;

    if( p_access->info.b_eof )
        return 0;

    do
    {
        if( !vlc_object_alive (p_access) )
            return 0;

        ufd.revents = 0;
    }
    while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );

    if( i_ret < 0 )
    {
        msg_Err( p_access, "Polling error (%m)." );
        return -1;
    }

    i_ret = read( p_sys->i_fd, p_buffer, i_len );
    if( i_ret == 0 )
    {
        p_access->info.b_eof = true;
    }
    else if( i_ret > 0 )
    {
        p_access->info.i_pos += i_ret;
    }

    return i_ret;
}

/*****************************************************************************
 * Control
 *****************************************************************************/
static int Control( access_t *p_access, int i_query, va_list args )
{
    bool   *pb_bool;
    int          *pi_int;
    int64_t      *pi_64;

    switch( i_query )
    {
        /* */
        case ACCESS_CAN_SEEK:
        case ACCESS_CAN_FASTSEEK:
            pb_bool = (bool*)va_arg( args, bool* );
            *pb_bool = false;
            break;
        case ACCESS_CAN_PAUSE:
            pb_bool = (bool*)va_arg( args, bool* );
            *pb_bool = false;
            break;
        case ACCESS_CAN_CONTROL_PACE:
            pb_bool = (bool*)va_arg( args, bool* );
            *pb_bool = false;
            break;

        /* */
        case ACCESS_GET_MTU:
            pi_int = (int*)va_arg( args, int * );
            *pi_int = 0;
            break;

        case ACCESS_GET_PTS_DELAY:
            pi_64 = (int64_t*)va_arg( args, int64_t * );
            *pi_64 = (int64_t)var_GetInteger( p_access, "pvr-caching" ) * 1000;
            break;

        /* */
        case ACCESS_SET_PAUSE_STATE:
            /* Nothing to do */
            break;

        case ACCESS_GET_TITLE_INFO:
        case ACCESS_SET_TITLE:
        case ACCESS_SET_SEEKPOINT:
        case ACCESS_SET_PRIVATE_ID_STATE:
        case ACCESS_GET_CONTENT_TYPE:
            return VLC_EGENERIC;

        default:
            msg_Warn( p_access, "Unimplemented query in control." );
            return VLC_EGENERIC;

    }
    return VLC_SUCCESS;
}