pvr.c

VLC Player Source Code

        case 0x0030: return V4L2_MPEG_AUDIO_L2_BITRATE_56K;
        case 0x0040: return V4L2_MPEG_AUDIO_L2_BITRATE_64K;
        case 0x0050: return V4L2_MPEG_AUDIO_L2_BITRATE_80K;
        case 0x0060: return V4L2_MPEG_AUDIO_L2_BITRATE_96K;
        case 0x0070: return V4L2_MPEG_AUDIO_L2_BITRATE_112K;
        case 0x0080: return V4L2_MPEG_AUDIO_L2_BITRATE_128K;
        case 0x0090: return V4L2_MPEG_AUDIO_L2_BITRATE_160K;
        case 0x00a0: return V4L2_MPEG_AUDIO_L2_BITRATE_192K;
        case 0x00b0: return V4L2_MPEG_AUDIO_L2_BITRATE_224K;
        case 0x00c0: return V4L2_MPEG_AUDIO_L2_BITRATE_256K;
        case 0x00d0: return V4L2_MPEG_AUDIO_L2_BITRATE_320K;
        case 0x00e0: return V4L2_MPEG_AUDIO_L2_BITRATE_384K;
    }
    return V4L2_MPEG_AUDIO_L2_BITRATE_192K;
}

/*****************************************************************************
 * V4L2AudioMode: calculate v4l2 audio mode from pvr-audio-bitmask
 *****************************************************************************/
static uint32_t V4L2AudioMode( uint32_t i_bitmask )
{
    switch( i_bitmask & 0x0300 )
    {
        case 0x0100: return V4L2_MPEG_AUDIO_MODE_JOINT_STEREO;
        case 0x0200: return V4L2_MPEG_AUDIO_MODE_DUAL;
        case 0x0300: return V4L2_MPEG_AUDIO_MODE_MONO;
    }
    return V4L2_MPEG_AUDIO_MODE_STEREO;
}

/*****************************************************************************
 * ConfigureV4L2: set up codec parameters using the new v4l2 api
 *****************************************************************************/
static int ConfigureV4L2( access_t * p_access )
{
    access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
    struct v4l2_ext_controls controls;
    int result;

    memset( &controls, 0, sizeof(struct v4l2_ext_controls) );
    controls.ctrl_class  = V4L2_CTRL_CLASS_MPEG;
    controls.error_idx   = 0;
    controls.reserved[0] = 0;
    controls.reserved[1] = 0;
    controls.count       = 0;
    controls.controls    = calloc( sizeof( struct v4l2_ext_control ),
                                   MAX_V4L2_CTRLS );

    if( controls.controls == NULL )
        return VLC_ENOMEM;

    /* Note: Ignore frame rate.  Doesn't look like it can be changed. */
    if( p_sys->i_bitrate != -1 )
    {
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE,
                     p_sys->i_bitrate );
        msg_Dbg( p_access, "Setting [%u] bitrate = %u",
                 controls.count - 1, p_sys->i_bitrate );
    }

    if( p_sys->i_bitrate_peak != -1 )
    {
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
                     p_sys->i_bitrate_peak );
        msg_Dbg( p_access, "Setting [%u] bitrate_peak = %u",
                 controls.count - 1, p_sys->i_bitrate_peak );
    }

    if( p_sys->i_bitrate_mode != -1 )
    {
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
                     p_sys->i_bitrate_mode );
        msg_Dbg( p_access, "Setting [%u] bitrate_mode = %u",
                 controls.count - 1, p_sys->i_bitrate_mode );
    }

    if( p_sys->i_audio_bitmask != -1 )
    {
        /* Sample rate */
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
                    V4L2SampleRate( p_sys->i_audio_bitmask ) );

        /* Encoding layer and bitrate */
        switch( V4L2AudioEncoding( p_sys->i_audio_bitmask ) )
        {
            case V4L2_MPEG_AUDIO_ENCODING_LAYER_1:
                 AddV4L2Ctrl( p_access, &controls,
                              V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
                              V4L2_MPEG_AUDIO_ENCODING_LAYER_1 );
                 AddV4L2Ctrl( p_access, &controls,
                              V4L2_CID_MPEG_AUDIO_L1_BITRATE,
                              V4L2AudioL1Bitrate( p_sys->i_audio_bitmask ) );
                 break;

            case V4L2_MPEG_AUDIO_ENCODING_LAYER_2:
                 AddV4L2Ctrl( p_access, &controls,
                              V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
                              V4L2_MPEG_AUDIO_ENCODING_LAYER_2 );
                 AddV4L2Ctrl( p_access, &controls,
                              V4L2_CID_MPEG_AUDIO_L2_BITRATE,
                              V4L2AudioL2Bitrate( p_sys->i_audio_bitmask ) );
                 break;
        }

        /* Audio mode - stereo or mono */
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_AUDIO_MODE,
                     V4L2AudioMode( p_sys->i_audio_bitmask ) );

        /* See if the user wants any other audio feature */
        if( ( p_sys->i_audio_bitmask & 0x1ff00 ) != 0 )
        {
            /* It would be possible to support the bits that represent:
             *   V4L2_CID_MPEG_AUDIO_MODE_EXTENSION
             *   V4L2_CID_MPEG_AUDIO_EMPHASIS
             *   V4L2_CID_MPEG_AUDIO_CRC
             * but they are not currently used.  Tell the user.
             */
            msg_Err( p_access, "There were bits in pvr-audio-bitmask that were not used.");
        }
        msg_Dbg( p_access, "Setting audio controls");
    }

    if( p_sys->i_keyint != -1 )
    {
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
                     p_sys->i_keyint );
        msg_Dbg( p_access, "Setting [%u] keyint = %u",
                 controls.count - 1, p_sys->i_keyint );
    }

    if( p_sys->i_bframes != -1 )
    {
        AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_B_FRAMES,
                     p_sys->i_bframes );
        msg_Dbg( p_access, "Setting [%u] bframes = %u",
                 controls.count - 1, p_sys->i_bframes );
    }

    result = ioctl( p_sys->i_fd, VIDIOC_S_EXT_CTRLS, &controls );
    if( result < 0 )
    {
        msg_Err( p_access, "Failed to write %u new capture card settings.",
                            controls.error_idx );
    }
    free( controls.controls );
    return VLC_SUCCESS;
}

#endif /* HAVE_NEW_LINUX_VIDEODEV2_H */

/*****************************************************************************
 * Open: open the device
 *****************************************************************************/
static int Open( vlc_object_t * p_this )
{
    access_t *p_access = (access_t*) p_this;
    access_sys_t * p_sys;
    char * psz_tofree;
    char * psz_parser;
    char * psz_device = NULL;
    vlc_value_t val;
    struct v4l2_capability device_capability;
    int result;

    memset( &device_capability, 0, sizeof(struct v4l2_capability) );

    p_access->pf_read = Read;
    p_access->pf_block = NULL;
    p_access->pf_seek = NULL;
    p_access->pf_control = Control;
    p_access->info.i_update = 0;
    p_access->info.i_size = 0;
    p_access->info.i_pos = 0;
    p_access->info.b_eof = false;
    p_access->info.i_title = 0;
    p_access->info.i_seekpoint = 0;

    /* create private access data */
    p_sys = calloc( sizeof( access_sys_t ), 1 );
    if( !p_sys )
        return VLC_ENOMEM;

    p_access->p_sys = p_sys;

    /* defaults values */
    var_Create( p_access, "pvr-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );

    var_Create( p_access, "pvr-device", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-device" , &val);
    p_sys->psz_videodev = val.psz_string;

    var_Create( p_access, "pvr-radio-device", VLC_VAR_STRING |
                                              VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-radio-device" , &val);
    p_sys->psz_radiodev = val.psz_string;

    var_Create( p_access, "pvr-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-norm" , &val);
    p_sys->i_standard = val.i_int;

    var_Create( p_access, "pvr-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-width" , &val);
    p_sys->i_width = val.i_int;

    var_Create( p_access, "pvr-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-height" , &val);
    p_sys->i_height = val.i_int;

    var_Create( p_access, "pvr-frequency", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-frequency" , &val);
    p_sys->i_frequency = val.i_int;

    var_Create( p_access, "pvr-framerate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-framerate" , &val);
    p_sys->i_framerate = val.i_int;

    var_Create( p_access, "pvr-keyint", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-keyint" , &val);
    p_sys->i_keyint = val.i_int;

    var_Create( p_access, "pvr-bframes", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-bframes" , &val);
    p_sys->i_bframes = val.b_bool;

    var_Create( p_access, "pvr-bitrate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-bitrate" , &val);
    p_sys->i_bitrate = val.i_int;

    var_Create( p_access, "pvr-bitrate-peak", VLC_VAR_INTEGER |
                                              VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-bitrate-peak" , &val);
    p_sys->i_bitrate_peak = val.i_int;

    var_Create( p_access, "pvr-bitrate-mode", VLC_VAR_INTEGER |
                                              VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-bitrate-mode" , &val);
    p_sys->i_bitrate_mode = val.i_int;

    var_Create( p_access, "pvr-audio-bitmask", VLC_VAR_INTEGER |
                                              VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-audio-bitmask" , &val);
    p_sys->i_audio_bitmask = val.i_int;

    var_Create( p_access, "pvr-audio-volume", VLC_VAR_INTEGER |
                                              VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-audio-volume" , &val);
    p_sys->i_volume = val.i_int;

    var_Create( p_access, "pvr-channel", VLC_VAR_INTEGER |
                                              VLC_VAR_DOINHERIT );
    var_Get( p_access, "pvr-channel" , &val);
    p_sys->i_input = val.i_int;

    /* parse command line options */
    psz_tofree = strdup( p_access->psz_path );
    if( !psz_tofree )
        return VLC_ENOMEM;

    psz_parser = psz_tofree;
    if( *psz_parser )
    {
        for( ;; )
        {
            if ( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
            {
                char *psz_parser_init;
                psz_parser += strlen( "norm=" );
                psz_parser_init = psz_parser;
                while ( (*psz_parser != ':')
                        && (*psz_parser != ',')
                        && (*psz_parser != '\0') )
                {
                    psz_parser++;
                }

                if ( !strncmp( psz_parser_init, "secam" ,
                               psz_parser - psz_parser_init ) )
                {
                    p_sys->i_standard = V4L2_STD_SECAM;
                }
                else if ( !strncmp( psz_parser_init, "pal" ,
                                    psz_parser - psz_parser_init ) )
                {
                    p_sys->i_standard = V4L2_STD_PAL;
                }
                else if ( !strncmp( psz_parser_init, "ntsc" ,
                                    psz_parser - psz_parser_init ) )
                {
                    p_sys->i_standard = V4L2_STD_NTSC;
                }
                else
                {
                    p_sys->i_standard = strtol( psz_parser_init ,
                                                &psz_parser, 0 );
                }
            }
            else if( !strncmp( psz_parser, "channel=",
                               strlen( "channel=" ) ) )
            {
                p_sys->i_input =
                    strtol( psz_parser + strlen( "channel=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "device=", strlen( "device=" ) ) )
            {
                int i_len = strlen( "/dev/videox" );
                psz_device = calloc( i_len  + 1, 1 );
                if( !psz_device )
                    return VLC_ENOMEM;

                snprintf( psz_device, i_len, "/dev/video%ld",
                            strtol( psz_parser + strlen( "device=" ),
                            &psz_parser, 0 ) );
            }
            else if( !strncmp( psz_parser, "frequency=",
                               strlen( "frequency=" ) ) )
            {
                p_sys->i_frequency =
                    strtol( psz_parser + strlen( "frequency=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "framerate=",
                               strlen( "framerate=" ) ) )
            {
                p_sys->i_framerate =
                    strtol( psz_parser + strlen( "framerate=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "keyint=",
                               strlen( "keyint=" ) ) )
            {
                p_sys->i_keyint =
                    strtol( psz_parser + strlen( "keyint=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "bframes=",
                               strlen( "bframes=" ) ) )
            {
                p_sys->i_bframes =
                    strtol( psz_parser + strlen( "bframes=" ),
                            &psz_parser, 0 );
            }

            else if( !strncmp( psz_parser, "width=",
                               strlen( "width=" ) ) )
            {
                p_sys->i_width =
                    strtol( psz_parser + strlen( "width=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "height=",
                               strlen( "height=" ) ) )
            {
                p_sys->i_height =
                    strtol( psz_parser + strlen( "height=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "audio=",
                               strlen( "audio=" ) ) )
            {
                p_sys->i_audio_bitmask =
                    strtol( psz_parser + strlen( "audio=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "bitrate=",
                               strlen( "bitrate=" ) ) )
            {
                p_sys->i_bitrate =
                    strtol( psz_parser + strlen( "bitrate=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "maxbitrate=",
                               strlen( "maxbitrate=" ) ) )
            {
                p_sys->i_bitrate_peak =
                    strtol( psz_parser + strlen( "maxbitrate=" ),
                            &psz_parser, 0 );
            }
            else if( !strncmp( psz_parser, "bitratemode=",
                               strlen( "bitratemode=" ) ) )
            {
                char *psz_parser_init;
                psz_parser += strlen( "bitratemode=" );
                psz_parser_init = psz_parser;
                while ( (*psz_parser != ':')
                        && (*psz_parser != ',')
                        && (*psz_parser != '\0') )
                {
                    psz_parser++;
                }