vout.c

VLC媒体播放程序

/*****************************************************************************
 * vout.c: QNX RTOS video output display method
 *****************************************************************************
 * Copyright (C) 2001, 2002 VideoLAN
 *
 * Authors: Jon Lech Johansen <[e-mail]>
 *          Pascal Levesque <[e-mail]>
 *
 * 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, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <string.h>                                            /* strerror() */

#include <photon/PtWidget.h>
#include <photon/PtWindow.h>
#include <photon/PtLabel.h>
#include <photon/PdDirect.h>

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

/*****************************************************************************
 * vout_sys_t: video output QNX method descriptor
 *****************************************************************************
 * This structure is part of the video output thread descriptor.
 * It describes the QNX specific properties of an output thread. QNX video
 * output is performed through regular resizable windows. Windows can be
 * dynamically resized to adapt to the size of the streams.
 *****************************************************************************/
#define MAX_DIRECTBUFFERS 2

#define MODE_NORMAL_MEM     0
#define MODE_SHARED_MEM     1
#define MODE_VIDEO_MEM      2
#define MODE_VIDEO_OVERLAY  3

struct vout_sys_t
{
    /* video mode */
    int                     i_mode;

    /* internal stuff */
    PtWidget_t *            p_window;

    /* Color palette for 8bpp */
    PgColor_t p_colors[255];

    /* [shared] memory blit */
    int                     i_img_type;

    /* video memory blit */

    /* video overlay */
    PgVideoChannel_t *      p_channel;
    int                     i_vc_flags;
    int                     i_vc_format;

    int                 i_screen_depth;
    int                 i_bytes_per_pixel;
    int                 i_bytes_per_line;

    /* position & dimensions */
    PhPoint_t               pos;
    PhDim_t                 dim;
    PhPoint_t               old_pos;
    PhDim_t                 old_dim;
    PhDim_t                 screen_dim;
    PhRect_t                frame;
};


/*****************************************************************************
 * picture_sys_t: direct buffer method descriptor
 *****************************************************************************
 * This structure is part of the picture descriptor, it describes the
 * XVideo specific properties of a direct buffer.
 *****************************************************************************/
struct picture_sys_t
{
    /* [shared] memory blit */
    PhImage_t *             p_image;

    /* video memory blit and video overlay */
    PdOffscreenContext_t *  p_ctx[3];   /* 0: y, 1: u, 2: v */
    char *                  p_buf[3];
};


/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int  QNXInit      ( vout_thread_t * );
static void QNXEnd       ( vout_thread_t * );
static int  QNXManage    ( vout_thread_t * );
static void QNXDisplay   ( vout_thread_t *, picture_t * );

static int  QNXInitDisplay ( vout_thread_t * );
static int  QNXCreateWnd   ( vout_thread_t * );
static int  QNXDestroyWnd  ( vout_thread_t * );

static int  NewPicture     ( vout_thread_t *, picture_t *, int );
static void FreePicture    ( vout_thread_t *, picture_t * );
static int  ResizeOverlayOutput ( vout_thread_t * );
static void SetPalette     ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );

/*****************************************************************************
 * OpenVideo: allocate QNX video thread output method
 *****************************************************************************
 * This function allocate and initialize a QNX vout method. It uses some of the
 * vout properties to choose the window size, and change them according to the
 * actual properties of the display.
 *****************************************************************************/
int E_(OpenVideo) ( vlc_object_t *p_this )
{
    vout_thread_t * p_vout = (vout_thread_t *)p_this;

    /* init connection to photon */
    if( PtInit( "/dev/photon" ) != 0 )
    {
        msg_Err( p_vout, "unable to connect to photon" );
        return( 1 );
    }

    /* allocate structure */
    p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
    if( p_vout->p_sys == NULL )
    {
        msg_Err( p_vout, "out of memory" );
        return( 1 );
    }

    memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );

    p_vout->b_fullscreen = config_GetInt( p_vout, "fullscreen" );
    p_vout->p_sys->i_mode = config_GetInt( p_vout, "overlay" ) ?
                                MODE_VIDEO_OVERLAY : MODE_VIDEO_MEM;
    p_vout->p_sys->dim.w = p_vout->i_window_width;
    p_vout->p_sys->dim.h = p_vout->i_window_height;

    /* init display and create window */
    if( QNXInitDisplay( p_vout ) || QNXCreateWnd( p_vout ) )
    {
        free( p_vout->p_sys );
        return( 1 );
    }

    p_vout->pf_init = QNXInit;
    p_vout->pf_end = QNXEnd;
    p_vout->pf_manage = QNXManage;
    p_vout->pf_render = NULL;
    p_vout->pf_display = QNXDisplay;

    return( 0 );
}

/*****************************************************************************
 * QNXInit: initialize QNX video thread output method
 *****************************************************************************
 * This function create the buffers needed by the output thread. It is called
 * at the beginning of the thread, but also each time the window is resized.
 *****************************************************************************/
static int QNXInit( vout_thread_t *p_vout )
{
    int i_index;
    picture_t *p_pic;

    I_OUTPUTPICTURES = 0;

    switch( p_vout->p_sys->i_mode )
    {
    case MODE_NORMAL_MEM:
    case MODE_SHARED_MEM:
        p_vout->output.i_width = p_vout->p_sys->dim.w;
        p_vout->output.i_height = p_vout->p_sys->dim.h;

        /* Assume we have square pixels */
        p_vout->output.i_aspect = p_vout->p_sys->dim.w
                               * VOUT_ASPECT_FACTOR / p_vout->p_sys->dim.h;
        break;

    case MODE_VIDEO_MEM:
        p_vout->output.i_width = p_vout->p_sys->dim.w;
        p_vout->output.i_height = p_vout->p_sys->dim.h;

        /* Assume we have square pixels */
        p_vout->output.i_aspect = p_vout->p_sys->dim.w
                               * VOUT_ASPECT_FACTOR / p_vout->p_sys->dim.h;
        break;

    case MODE_VIDEO_OVERLAY:
        p_vout->output.i_width  = p_vout->render.i_width;
        p_vout->output.i_height = p_vout->render.i_height;
        p_vout->output.i_aspect = p_vout->render.i_aspect;

        if (ResizeOverlayOutput(p_vout))
        {
            return (1);
        }
        break;

    default:
        /* This shouldn't happen ! */
        break;
    }

    /* Try to initialize up to MAX_DIRECTBUFFERS direct buffers */
    while( I_OUTPUTPICTURES < MAX_DIRECTBUFFERS )
    {
        p_pic = NULL;

        /* Find an empty picture slot */
        for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
        {
            if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
            {
                p_pic = p_vout->p_picture + i_index;
                break;
            }
        }

        /* Allocate the picture */
        if( p_pic == NULL || NewPicture( p_vout, p_pic, I_OUTPUTPICTURES ) )
        {
            break;
        }

        p_pic->i_status = DESTROYED_PICTURE;
        p_pic->i_type   = DIRECT_PICTURE;

        PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;

        I_OUTPUTPICTURES++;
    }

    return( 0 );
}

/*****************************************************************************
 * QNXEnd: terminate QNX video thread output method
 *****************************************************************************
 * Destroy the buffers created by QNXInit. It is called at the end of
 * the thread, but also each time the window is resized.
 *****************************************************************************/
static void QNXEnd( vout_thread_t *p_vout )
{
    int i_index;

    /* Free the direct buffers we allocated */
    for( i_index = I_OUTPUTPICTURES ; i_index ; )
    {
        i_index--;
        FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
    }
}

/*****************************************************************************
 * CloseVideo: destroy QNX video thread output method
 *****************************************************************************
 * Terminate an output method created by QNXCreate
 *****************************************************************************/
void E_(CloseVideo) ( vlc_object_t *p_this )
{
    vout_thread_t * p_vout = (vout_thread_t *)p_this;

    /* destroy the window */
    QNXDestroyWnd( p_vout );

    /* destroy structure */
    free( p_vout->p_sys );
}

/*****************************************************************************
 * QNXManage: handle QNX events
 *****************************************************************************
 * This function should be called regularly by video output thread. It allows
 * window resizing. It returns a non null value on error.
 *****************************************************************************/
static int QNXManage( vout_thread_t *p_vout )
{
    int i_ev,  i_buflen;
    PhEvent_t *p_event;
    vlc_bool_t b_repos = 0;

    if (p_vout->b_die == 1)
    {
        return ( 0 );
    }

    /* allocate buffer for event */
    i_buflen = sizeof( PhEvent_t ) * 4;
    if( ( p_event = malloc( i_buflen ) ) == NULL )
    {
        msg_Err( p_vout, "out of memory" );
        return( 1 );
    }

    /* event loop */
    do
    {
        memset( p_event, 0, i_buflen );
        i_ev = PhEventPeek( p_event, i_buflen );

        if( i_ev == Ph_RESIZE_MSG )
        {
            i_buflen = PhGetMsgSize( p_event );
            if( ( p_event = realloc( p_event, i_buflen ) ) == NULL )
            {
                msg_Err( p_vout, "out of memory" );
                return( 1 );
            }
        }
        else if( i_ev == Ph_EVENT_MSG )
        {
            PtEventHandler( p_event );

            if( p_event->type == Ph_EV_WM )
            {
                PhWindowEvent_t *p_ev = PhGetData( p_event );

                switch( p_ev->event_f )
                {
                case Ph_WM_CLOSE:
                    p_vout->p_vlc->b_die = 1;
                    break;

                case Ph_WM_MOVE:
                    p_vout->p_sys->pos.x = p_ev->pos.x;
                    p_vout->p_sys->pos.y = p_ev->pos.y;
                    b_repos = 1;
                    break;

                case Ph_WM_RESIZE:
                    p_vout->p_sys->old_dim.w = p_vout->p_sys->dim.w;
                    p_vout->p_sys->old_dim.h = p_vout->p_sys->dim.h;
                    p_vout->p_sys->dim.w = p_ev->size.w;
                    p_vout->p_sys->dim.h = p_ev->size.h;
                    p_vout->i_changes |= VOUT_SIZE_CHANGE;
                    break;
                }
            }
            else if( p_event->type == Ph_EV_KEY )
            {
                PhKeyEvent_t *p_ev = PhGetData( p_event );
                long i_key = p_ev->key_sym;