dc1394.c

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * dc1394.c: firewire input module
 *****************************************************************************
 * Copyright (C) 2006, the VideoLAN team
 *
 * Authors: Xant Majere <[e-mail]>
 *
 *****************************************************************************
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2 of the License.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/

#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/vout.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef HAVE_FCNTL_H
#   include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#elif defined( WIN32 ) && !defined( UNDER_CE )
#   include <io.h>
#endif

#include <sys/ioctl.h>
#include <sys/soundcard.h>

#include <libraw1394/raw1394.h>
#include <libdc1394/dc1394_control.h>

#define MAX_IEEE1394_HOSTS 32
#define MAX_CAMERA_NODES 32

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );
static void OpenAudioDev( demux_t *p_demux );
static inline void CloseAudioDev( demux_t *p_demux );

vlc_module_begin();
    set_description( _("dc1394 input") );
    set_capability( "access_demux", 10 );
    add_shortcut( "dc1394" );
    set_callbacks( Open, Close );
vlc_module_end();

typedef struct __dc_camera
{
    int port;
    nodeid_t node;
    u_int64_t uid;
} dc_camera;

typedef struct demux_sys_t
{
    dc1394_cameracapture camera;
    picture_t            pic;
    int                  dma_capture;
#define DMA_OFF 0
#define DMA_ON 1
    int                 num_ports;
    int                 num_cameras;
    int                 selected_camera;
    u_int64_t           selected_uid;

    dc_camera           *camera_nodes;
	dc1394_camerainfo   camera_info;
	dc1394_miscinfo     misc_info;
    raw1394handle_t     fd_video;
    quadlet_t           supported_framerates;

    int                 width;
    int                 height;
    int                 frame_size;
    int                 frame_rate;
    unsigned int        brightness;
    unsigned int        focus;
    char                *dma_device;
    es_out_id_t         *p_es_video;

    /* audio stuff */
    int                 i_sample_rate;
    int                 channels;
    int                 i_audio_max_frame_size;
    int                 fd_audio;
    char                *audio_device;
    int                 rotate;
#define NO_ROTATION 0
#define ROTATION_LEFT 1
#define ROTATION_RIGHT 2
    es_out_id_t         *p_es_audio;
} dc1394_sys;

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int Demux( demux_t *p_demux );
static int Control( demux_t *, int, va_list );
static block_t *GrabVideo( demux_t *p_demux );
static block_t *GrabAudio( demux_t *p_demux );
static int process_options( demux_t *p_demux);

/*****************************************************************************
 * ScanCameras
 *****************************************************************************/
static int ScanCameras( dc1394_sys *sys, demux_t *p_demux )
{
    struct raw1394_portinfo portinfo[MAX_IEEE1394_HOSTS];
    raw1394handle_t tempFd;
    dc1394_camerainfo  info;
    dc_camera       *node_list = NULL;
    nodeid_t        *nodes = NULL;
    int num_ports = 0;
    int num_cameras = 0;
    int nodecount;
    int i, n;

    memset( &portinfo, 0, sizeof(portinfo) );

    msg_Dbg( p_demux, "Scanning for ieee1394 ports ..." );

    tempFd = raw1394_new_handle();
    if( !tempFd )
        return VLC_EGENERIC;
    raw1394_get_port_info( tempFd, portinfo, MAX_IEEE1394_HOSTS);
    raw1394_destroy_handle( tempFd );

    for( i=0; i < MAX_IEEE1394_HOSTS; i++ )
    {
        /* check if port exists and has at least one node*/
        if( !portinfo[i].nodes )
            continue;
        nodes = NULL;
        nodecount = 0;
        tempFd = dc1394_create_handle( i );

        /* skip this port if we can't obtain a valid handle */
        if(!tempFd)
            continue;
        msg_Dbg( p_demux, "Found ieee1394 port %d (%s) ... "
                          "checking for camera nodes",
                          i, portinfo[i].name );
        num_ports++;

        nodes = dc1394_get_camera_nodes( tempFd, &nodecount, 0 );
        if( nodecount )
        {
            msg_Dbg( p_demux, "Found %d dc1394 cameras on port %d (%s)",
                     nodecount, i, portinfo[i].name );

            if(node_list)
                node_list = realloc( node_list, sizeof(dc_camera) * (num_cameras+nodecount) );
            else
                node_list = malloc( sizeof(dc_camera) * nodecount);

            for( n = 0; n < nodecount; n++ )
            {
                int result = 0;

                result = dc1394_get_camera_info( tempFd, nodes[n], &info );
                if( result == DC1394_SUCCESS )
                {
                    node_list[num_cameras+n].uid = info.euid_64;
                }
                node_list[num_cameras+n].node = nodes[n];
                node_list[num_cameras+n].port = i;
            }
            num_cameras += nodecount;
        }
        else
            msg_Dbg( p_demux, "no cameras found  on port %d (%s)",
                     i, portinfo[i].name);

        if(tempFd)
            dc1394_destroy_handle( tempFd );
    }
    sys->num_ports = num_ports;
    sys->num_cameras = num_cameras;
    sys->camera_nodes = node_list;
    return VLC_SUCCESS;
}

/*****************************************************************************
 * Open:
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    demux_t     *p_demux = (demux_t*)p_this;
    demux_sys_t *p_sys;
    es_format_t fmt;
    int i;
    int i_width;
    int i_height;
    int i_aspect;
    int result = 0;

    /* Set up p_demux */
    p_demux->pf_demux = Demux;
    p_demux->pf_control = Control;
    p_demux->info.i_update = 0;
    p_demux->info.i_title = 0;
    p_demux->info.i_seekpoint = 0;

    p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
    if( !p_sys )
    {
        msg_Err( p_demux, "not enough memory available" );
        return VLC_ENOMEM;
    }
    memset( p_sys, 0, sizeof( demux_sys_t ) );
    memset( &fmt, 0, sizeof( es_format_t ) );

    /* DEFAULTS */
    p_sys->frame_size = MODE_640x480_YUV422;
    p_sys->width      = 640;
    p_sys->height     = 480;
    p_sys->frame_rate = FRAMERATE_30;
    p_sys->brightness = 200;
    p_sys->focus      = 0;
    p_sys->dma_capture = DMA_ON; /* defaults to VIDEO1394 capture mode */
    p_sys->fd_audio   = -1;
    p_sys->fd_video   = NULL;
    p_sys->camera_nodes = NULL;
    p_sys->selected_camera = 0;
    p_sys->dma_device = NULL;
    p_sys->selected_uid = 0;
    p_sys->rotate = NO_ROTATION;

    /* PROCESS INPUT OPTIONS */
    if( process_options(p_demux) != VLC_SUCCESS )
    {
        msg_Err( p_demux, "Bad MRL, please check the option line "
                          "(MRL was: %s)",
                          p_demux->psz_path );
        free( p_sys );
        p_demux->p_sys = NULL;
        return VLC_EGENERIC;
    }

    msg_Dbg( p_demux, "Selected camera %d", p_sys->selected_camera );
    msg_Dbg( p_demux, "Selected uid 0x%llx", p_sys->selected_uid );

    ScanCameras( p_sys, p_demux );
    if( !p_sys->camera_nodes )
    {
        msg_Err( p_demux, "No camera found !!" );
        Close( p_this );
        return VLC_EGENERIC;
    }

    if( p_sys->selected_uid )
    {
        int found = 0;
        for( i=0; i < p_sys->num_cameras; i++ )
        {
            if( p_sys->camera_nodes[i].uid == p_sys->selected_uid )
            {
                p_sys->selected_camera = i;
                found++;
                break;
            }
        }
        if( !found )
        {
            msg_Err( p_demux, "Can't find camera with uid : 0x%llx.",
                     p_sys->selected_uid );
            Close( p_this );
            return VLC_EGENERIC;
        }
    }
    else if( p_sys->selected_camera >= p_sys->num_cameras )
    {
        msg_Err( p_demux, "there are not this many cameras. (%d/%d)",
                          p_sys->selected_camera, p_sys->num_cameras );
        Close( p_this );
        return VLC_EGENERIC;
    }

    p_sys->fd_video = dc1394_create_handle(
                        p_sys->camera_nodes[p_sys->selected_camera].port );
    if( (int)p_sys->fd_video < 0 )
    {
        msg_Err( p_demux, "Can't init dc1394 handle" );
        Close( p_this );
        return VLC_EGENERIC;
    }

    /* get camera info */
    result = dc1394_get_camera_info( p_sys->fd_video,
                        p_sys->camera_nodes[p_sys->selected_camera].node,
                        &p_sys->camera_info );
    if( result != DC1394_SUCCESS )
    {
        msg_Err( p_demux ,"unable to get camera info" );
        Close( p_this );
        return VLC_EGENERIC;
    }

    dc1394_print_camera_info( &p_sys->camera_info );
    result = dc1394_get_camera_misc_info( p_sys->fd_video,
                        p_sys->camera_nodes[p_sys->selected_camera].node,
                        &p_sys->misc_info );
    if( result != DC1394_SUCCESS )
    {
        msg_Err( p_demux, "unable to get camera misc info" );
        Close( p_this );
        return VLC_EGENERIC;
    }

    /* init camera and set some video options  */
    result = dc1394_init_camera( p_sys->camera_info.handle,
                                 p_sys->camera_info.id );
    if( result != DC1394_SUCCESS )
    {
        msg_Err( p_demux, "unable to get init dc1394 camera" );
        Close( p_this );
        return VLC_EGENERIC;
    }

    if( p_sys->focus )
    {
        result = dc1394_set_focus( p_sys->camera_info.handle,
                        p_sys->camera_nodes[p_sys->selected_camera].node,
                        p_sys->focus );
        if( result != DC1394_SUCCESS )
        {
            msg_Err( p_demux, "unable to set initial focus to %u",
                     p_sys->focus );
        }
        msg_Dbg( p_demux, "Initial focus set to %u", p_sys->focus );
    }

    result = dc1394_set_brightness( p_sys->camera_info.handle,
                        p_sys->camera_nodes[p_sys->selected_camera].node,
                        p_sys->brightness );
    if( result != DC1394_SUCCESS )
    {
        msg_Err( p_demux, "unable to set init brightness to %d",
                 p_sys->brightness);