video_output.c

vlc stand 0.1.99 ist sehr einfach

/*****************************************************************************
 * video_output.c : video output thread
 * This module describes the programming interface for video output threads.
 * It includes functions allowing to open a new thread, send pictures to a
 * thread, and destroy a previously oppened video output thread.
 *****************************************************************************
 * Copyright (C) 2000 VideoLAN
 *
 * Authors:
 *
 * 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 "defs.h"

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

#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "plugins.h"
#include "video.h"
#include "video_output.h"
#include "video_text.h"
#include "video_spu.h"
#include "video_yuv.h"

#include "intf_msg.h"
#include "main.h"

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int      BinaryLog         ( u32 i );
static void     MaskToShift       ( int *pi_left, int *pi_right, u32 i_mask );
static int      InitThread        ( vout_thread_t *p_vout );
static void     RunThread         ( vout_thread_t *p_vout );
static void     ErrorThread       ( vout_thread_t *p_vout );
static void     EndThread         ( vout_thread_t *p_vout );
static void     DestroyThread     ( vout_thread_t *p_vout, int i_status );
static void     Print             ( vout_thread_t *p_vout, int i_x, int i_y,
                                    int i_h_align, int i_v_align,
                                    unsigned char *psz_text );
static void     SetBufferArea     ( vout_thread_t *p_vout, int i_x, int i_y,
                                    int i_w, int i_h );
static void     SetBufferPicture  ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderPicture     ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderPictureInfo ( vout_thread_t *p_vout, picture_t *p_pic );
static void     RenderSubPicture  ( vout_thread_t *p_vout,
                                    subpicture_t *p_subpic );
static void     RenderInterface   ( vout_thread_t *p_vout );
static int      RenderIdle        ( vout_thread_t *p_vout );
static void     RenderInfo        ( vout_thread_t *p_vout );
static void     Synchronize       ( vout_thread_t *p_vout, s64 i_delay );
static int      Manage            ( vout_thread_t *p_vout );
static int      Align             ( vout_thread_t *p_vout, int *pi_x,
                                    int *pi_y, int i_width, int i_height,
                                    int i_h_align, int i_v_align );
static void     SetPalette        ( p_vout_thread_t p_vout, u16 *red,
                                    u16 *green, u16 *blue, u16 *transp );

/*****************************************************************************
 * vout_CreateThread: creates a new video output thread
 *****************************************************************************
 * This function creates a new video output thread, and returns a pointer
 * to its description. On error, it returns NULL.
 * If pi_status is NULL, then the function will block until the thread is ready.
 * If not, it will be updated using one of the THREAD_* constants.
 *****************************************************************************/
vout_thread_t * vout_CreateThread   ( char *psz_display, int i_root_window,
                          int i_width, int i_height, int *pi_status,
                          int i_method, void *p_data )
{
    vout_thread_t * p_vout;                             /* thread descriptor */
    int             i_status;                               /* thread status */
    int             i_index;               /* index for array initialization */
    char *          psz_method;

    /* Allocate descriptor */
    intf_DbgMsg("\n");
    p_vout = (vout_thread_t *) malloc( sizeof(vout_thread_t) );
    if( p_vout == NULL )
    {
        intf_ErrMsg( "error: %s\n", strerror(ENOMEM) );
        return( NULL );
    }

    /* Request an interface plugin */
    psz_method = main_GetPszVariable( VOUT_METHOD_VAR, VOUT_DEFAULT_METHOD );

    if( RequestPlugin( &p_vout->vout_plugin, "vout", psz_method ) < 0 )
    {
        intf_ErrMsg( "error: could not open video plugin vout_%s.so\n", psz_method );
        free( p_vout );
        return( NULL );
    }

    /* Get plugins */
    p_vout->p_sys_create = 
        GetPluginFunction( p_vout->vout_plugin, "vout_SysCreate" );
    p_vout->p_sys_init =
        GetPluginFunction( p_vout->vout_plugin, "vout_SysInit" );
    p_vout->p_sys_end =
        GetPluginFunction( p_vout->vout_plugin, "vout_SysEnd" );
    p_vout->p_sys_destroy =
        GetPluginFunction( p_vout->vout_plugin, "vout_SysDestroy" );
    p_vout->p_sys_manage =
        GetPluginFunction( p_vout->vout_plugin, "vout_SysManage" );
    p_vout->p_sys_display =
        GetPluginFunction( p_vout->vout_plugin, "vout_SysDisplay" );

    /* Initialize thread properties - thread id and locks will be initialized
     * later */
    p_vout->b_die               = 0;
    p_vout->b_error             = 0;
    p_vout->b_active            = 0;
    p_vout->pi_status           = (pi_status != NULL) ? pi_status : &i_status;
    *p_vout->pi_status          = THREAD_CREATE;

    /* Initialize some fields used by the system-dependant method - these fields will
     * probably be modified by the method, and are only preferences */
    p_vout->i_changes           = 0;
    p_vout->i_width             = i_width;
    p_vout->i_height            = i_height;
    p_vout->i_bytes_per_line    = i_width * 2;
    p_vout->i_screen_depth      = 15;
    p_vout->i_bytes_per_pixel   = 2;
    p_vout->f_gamma             = VOUT_GAMMA;

    p_vout->b_grayscale         = main_GetIntVariable( VOUT_GRAYSCALE_VAR,
                                                       VOUT_GRAYSCALE_DEFAULT );
    p_vout->b_info              = 0;
    p_vout->b_interface         = 0;
    p_vout->b_scale             = 0;

    p_vout->p_set_palette       = SetPalette;

    intf_DbgMsg( "wished configuration: %dx%d, %d/%d bpp (%d Bpl)\n",
                 p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
                 p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line );

    /* Initialize idle screen */
    p_vout->last_display_date   = mdate();
    p_vout->last_display_date   = 0;
    p_vout->last_idle_date      = 0;

#ifdef STATS
    /* Initialize statistics fields */
    p_vout->render_time         = 0;
    p_vout->c_fps_samples       = 0;
#endif

    /* Initialize buffer index */
    p_vout->i_buffer_index      = 0;

    /* Initialize pictures and subpictures - translation tables and functions
     * will be initialized later in InitThread */
    for( i_index = 0; i_index < VOUT_MAX_PICTURES; i_index++)
    {
        p_vout->p_picture[i_index].i_type   =   EMPTY_PICTURE;
        p_vout->p_picture[i_index].i_status =   FREE_PICTURE;
    }
    for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
    {
        p_vout->p_subpicture[i_index].i_type  = EMPTY_SUBPICTURE;
        p_vout->p_subpicture[i_index].i_status= FREE_SUBPICTURE;
    }
    p_vout->i_pictures = 0;

    /* Initialize synchronization informations */
    p_vout->i_synchro_level     = VOUT_SYNCHRO_LEVEL_START;

    /* Create and initialize system-dependant method - this function issues its
     * own error messages */
    if( p_vout->p_sys_create( p_vout, psz_display, i_root_window, p_data ) )
    {
        TrashPlugin( p_vout->vout_plugin );
        free( p_vout );
        return( NULL );
    }
    intf_DbgMsg("actual configuration: %dx%d, %d/%d bpp (%d Bpl), masks: 0x%x/0x%x/0x%x\n",
                p_vout->i_width, p_vout->i_height, p_vout->i_screen_depth,
                p_vout->i_bytes_per_pixel * 8, p_vout->i_bytes_per_line,
                p_vout->i_red_mask, p_vout->i_green_mask, p_vout->i_blue_mask );

    /* Calculate shifts from system-updated masks */
    MaskToShift( &p_vout->i_red_lshift,   &p_vout->i_red_rshift,   p_vout->i_red_mask );
    MaskToShift( &p_vout->i_green_lshift, &p_vout->i_green_rshift, p_vout->i_green_mask );
    MaskToShift( &p_vout->i_blue_lshift,  &p_vout->i_blue_rshift,  p_vout->i_blue_mask );

    /* Set some useful colors */
    p_vout->i_white_pixel = RGB2PIXEL( p_vout, 255, 255, 255 );
    p_vout->i_black_pixel = RGB2PIXEL( p_vout, 0, 0, 0 );
    p_vout->i_gray_pixel  = RGB2PIXEL( p_vout, 128, 128, 128 );
    p_vout->i_blue_pixel  = RGB2PIXEL( p_vout, 0, 0, 50 );

    /* Load fonts - fonts must be initialized after the system method since
     * they may be dependant on screen depth and other thread properties */
    p_vout->p_default_font      = vout_LoadFont( DATA_PATH "/" VOUT_DEFAULT_FONT );
    if( p_vout->p_default_font == NULL )
    {
        p_vout->p_default_font  = vout_LoadFont( "share/" VOUT_DEFAULT_FONT );
    }
    if( p_vout->p_default_font == NULL )
    {
        p_vout->p_sys_destroy( p_vout );
        TrashPlugin( p_vout->vout_plugin );
        free( p_vout );
        return( NULL );
    }
    p_vout->p_large_font        = vout_LoadFont( DATA_PATH "/" VOUT_LARGE_FONT );
    if( p_vout->p_large_font == NULL )
    {
        p_vout->p_large_font    = vout_LoadFont( "share/" VOUT_LARGE_FONT );
    }
    if( p_vout->p_large_font == NULL )
    {
        vout_UnloadFont( p_vout->p_default_font );
        p_vout->p_sys_destroy( p_vout );
        TrashPlugin( p_vout->vout_plugin );
        free( p_vout );
        return( NULL );
    }

    /* Create thread and set locks */
    vlc_mutex_init( &p_vout->picture_lock );
    vlc_mutex_init( &p_vout->subpicture_lock );
    vlc_mutex_init( &p_vout->change_lock );
    vlc_mutex_lock( &p_vout->change_lock );
    if( vlc_thread_create( &p_vout->thread_id, "video output", (void *) RunThread, (void *) p_vout) )
    {
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
        vout_UnloadFont( p_vout->p_default_font );
        vout_UnloadFont( p_vout->p_large_font );
        p_vout->p_sys_destroy( p_vout );
        TrashPlugin( p_vout->vout_plugin );
        free( p_vout );
        return( NULL );
    }

    intf_Msg("Video display initialized (%dx%d, %d/%d bpp)\n", p_vout->i_width,
             p_vout->i_height, p_vout->i_screen_depth, p_vout->i_bytes_per_pixel * 8 );

    /* If status is NULL, wait until the thread is created */
    if( pi_status == NULL )
    {
        do
        {
            msleep( THREAD_SLEEP );
        }while( (i_status != THREAD_READY) && (i_status != THREAD_ERROR)
                && (i_status != THREAD_FATAL) );
        if( i_status != THREAD_READY )
        {
            return( NULL );
        }
    }
    return( p_vout );
}

/*****************************************************************************
 * vout_DestroyThread: destroys a previously created thread
 *****************************************************************************
 * Destroy a terminated thread.
 * The function will request a destruction of the specified thread. If pi_error
 * is NULL, it will return once the thread is destroyed. Else, it will be
 * update using one of the THREAD_* constants.
 *****************************************************************************/
void vout_DestroyThread( vout_thread_t *p_vout, int *pi_status )
{
    int     i_status;                                       /* thread status */

    /* Set status */
    intf_DbgMsg("\n");
    p_vout->pi_status = (pi_status != NULL) ? pi_status : &i_status;
    *p_vout->pi_status = THREAD_DESTROY;

    /* Request thread destruction */
    p_vout->b_die = 1;

    /* If status is NULL, wait until thread has been destroyed */
    if( pi_status == NULL )
    {
        do
        {
            msleep( THREAD_SLEEP );
        }while( (i_status != THREAD_OVER) && (i_status != THREAD_ERROR)
                && (i_status != THREAD_FATAL) );
    }
}

/*****************************************************************************
 * vout_DisplaySubPicture: display a subpicture unit
 *****************************************************************************
 * Remove the reservation flag of an subpicture, which will cause it to be ready
 * for display. The picture does not need to be locked, since it is ignored by
 * the output thread if is reserved.
 *****************************************************************************/
void  vout_DisplaySubPicture( vout_thread_t *p_vout, subpicture_t *p_subpic )
{
#ifdef DEBUG_VIDEO
    char        psz_begin_date[MSTRTIME_MAX_SIZE]; /* buffer for date string */
    char        psz_end_date[MSTRTIME_MAX_SIZE];   /* buffer for date string */
#endif

#ifdef DEBUG
    /* Check if status is valid */
    if( p_subpic->i_status != RESERVED_SUBPICTURE )
    {
        intf_DbgMsg("error: subpicture %p has invalid status %d\n", p_subpic,
                    p_subpic->i_status );
    }