logo.c

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * logo.c : logo video plugin for vlc
 *****************************************************************************
 * Copyright (C) 2003-2006 the VideoLAN team
 * $Id: logo.c 18201 2006-12-02 14:59:52Z hartman $
 *
 * Authors: Gildas Bazin <[e-mail]>
 *          Simon Latapie <[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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */
#include <string.h>

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

#include "vlc_filter.h"
#include "filter_common.h"
#include "vlc_image.h"
#include "vlc_osd.h"

#ifdef LoadImage
#   undef LoadImage
#endif

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int  Create    ( vlc_object_t * );
static void Destroy   ( vlc_object_t * );

static int  Init      ( vout_thread_t * );
static void End       ( vout_thread_t * );
static void Render    ( vout_thread_t *, picture_t * );

static int  SendEvents( vlc_object_t *, char const *,
                        vlc_value_t, vlc_value_t, void * );
static int  MouseEvent( vlc_object_t *, char const *,
                        vlc_value_t , vlc_value_t , void * );
static int  Control   ( vout_thread_t *, int, va_list );

static int  CreateFilter ( vlc_object_t * );
static void DestroyFilter( vlc_object_t * );

static int LogoCallback( vlc_object_t *, char const *,
                         vlc_value_t, vlc_value_t, void * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
#define FILE_TEXT N_("Logo filenames")
#define FILE_LONGTEXT N_("Full path of the image files to use. Format is " \
"<image>[,<delay in ms>[,<alpha>]][;<image>[,<delay>[,<alpha>]]][;...]. " \
"If you only have one file, simply enter its filename.")
#define REPEAT_TEXT N_("Logo animation # of loops")
#define REPEAT_LONGTEXT N_("Number of loops for the logo animation." \
        "1 = continuous, 0 = disabled")
#define DELAY_TEXT N_("Logo individual image time in ms")
#define DELAY_LONGTEXT N_("Individual image display time of 0 - 60000 ms.")

#define POSX_TEXT N_("X coordinate")
#define POSX_LONGTEXT N_("X coordinate of the logo. You can move the logo " \
                "by left-clicking it." )
#define POSY_TEXT N_("Y coordinate")
#define POSY_LONGTEXT N_("Y coordinate of the logo. You can move the logo " \
                "by left-clicking it." )
#define TRANS_TEXT N_("Transparency of the logo")
#define TRANS_LONGTEXT N_("Logo transparency value " \
  "(from 0 for full transparency to 255 for full opacity)." )
#define POS_TEXT N_("Logo position")
#define POS_LONGTEXT N_( \
  "Enforce the logo position on the video " \
  "(0=center, 1=left, 2=right, 4=top, 8=bottom, you can " \
  "also use combinations of these values, eg 6 = top-right).")

static int pi_pos_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
static char *ppsz_pos_descriptions[] =
{ N_("Center"), N_("Left"), N_("Right"), N_("Top"), N_("Bottom"),
  N_("Top-Left"), N_("Top-Right"), N_("Bottom-Left"), N_("Bottom-Right") };

vlc_module_begin();
    set_description( _("Logo video filter") );
    set_capability( "video filter", 0 );
    set_shortname( _("Logo overlay") );
    set_category( CAT_VIDEO );
    set_subcategory( SUBCAT_VIDEO_SUBPIC );
    add_shortcut( "logo" );
    set_callbacks( Create, Destroy );

    add_file( "logo-file", NULL, NULL, FILE_TEXT, FILE_LONGTEXT, VLC_FALSE );
    add_integer( "logo-x", -1, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_TRUE );
    add_integer( "logo-y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_TRUE );
    /* default to 1000 ms per image, continuously cycle through them */
    add_integer( "logo-delay", 1000, NULL, DELAY_TEXT, DELAY_LONGTEXT, VLC_TRUE );
    add_integer( "logo-repeat", -1, NULL, REPEAT_TEXT, REPEAT_LONGTEXT, VLC_TRUE );
    add_integer_with_range( "logo-transparency", 255, 0, 255, NULL,
        TRANS_TEXT, TRANS_LONGTEXT, VLC_FALSE );
    add_integer( "logo-position", 6, NULL, POS_TEXT, POS_LONGTEXT, VLC_FALSE );
        change_integer_list( pi_pos_values, ppsz_pos_descriptions, 0 );

    /* subpicture filter submodule */
    add_submodule();
    set_capability( "sub filter", 0 );
    set_callbacks( CreateFilter, DestroyFilter );
    set_description( _("Logo sub filter") );
    add_shortcut( "logo" );
vlc_module_end();

/*****************************************************************************
 * Structure to hold the set of individual logo image names, times,
 * transparencies
 ****************************************************************************/
typedef struct
{
    char *psz_file;    /* candidate for deletion -- not needed */
    int i_delay;       /* -1 means use default delay */
    int i_alpha;       /* -1 means use default alpha */
    picture_t *p_pic;

} logo_t;

/*****************************************************************************
 * Logo list structure. Common to both the vout and sub picture filter
 ****************************************************************************/
typedef struct
{
    logo_t *p_logo;         /* the parsing's result */
    unsigned int i_count;   /* the number of logo images to be displayed */

    int i_repeat;         /* how often to repeat the images, image time in ms */
    mtime_t i_next_pic;     /* when to bring up a new logo image */

    unsigned int i_counter; /* index into the list of logo images */

    int i_delay;            /* default delay (0 - 60000 ms) */
    int i_alpha;            /* default alpha */

    char *psz_filename;     /* --logo-file string ( is it really useful
                             * to store it ? ) */

    vlc_mutex_t lock;
} logo_list_t;

/*****************************************************************************
 * LoadImage: loads the logo image into memory
 *****************************************************************************/
static picture_t *LoadImage( vlc_object_t *p_this, char *psz_filename )
{
    picture_t *p_pic;
    image_handler_t *p_image;
    video_format_t fmt_in = {0}, fmt_out = {0};

    fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
    p_image = image_HandlerCreate( p_this );
    p_pic = image_ReadUrl( p_image, psz_filename, &fmt_in, &fmt_out );
    image_HandlerDelete( p_image );

    return p_pic;
}

/*****************************************************************************
 * LoadLogoList: loads the logo images into memory
 *****************************************************************************
 * Read the logo-file input switch, obtaining a list of images and associated
 * durations and transparencies.  Store the image(s), and times.  An image
 * without a stated time or transparency will use the logo-delay and
 * logo-transparency values.
 *****************************************************************************/
#define LoadLogoList( a, b ) __LoadLogoList( VLC_OBJECT( a ), b )
void __LoadLogoList( vlc_object_t *p_this, logo_list_t *p_logo_list )
{
    char *psz_list; /* the list: <logo>[,[<delay>[,[<alpha>]]]][;...] */
    unsigned int i;
    logo_t *p_logo;         /* the parsing's result */

    p_logo_list->i_counter = 0;
    p_logo_list->i_next_pic = 0;

    psz_list = strdup( p_logo_list->psz_filename );

    /* Count the number logos == number of ';' + 1 */
    p_logo_list->i_count = 1;
    for( i = 0; i < strlen( psz_list ); i++ )
    {
        if( psz_list[i] == ';' ) p_logo_list->i_count++;
    }

    p_logo_list->p_logo = p_logo =
        (logo_t *)malloc( p_logo_list->i_count * sizeof(logo_t) );

    /* Fill the data */
    for( i = 0; i < p_logo_list->i_count; i++ )
    {
        char *p_c;
        char *p_c2;
        p_c = strchr( psz_list, ';' );
        p_c2 = strchr( psz_list, ',' );

        p_logo[i].i_alpha = -1; /* use default settings */
        p_logo[i].i_delay = -1; /* use default settings */

        if( p_c2 && ( p_c2 < p_c || !p_c ) )
        {
            /* <logo>,<delay>[,<alpha>] type */
            if( p_c2[1] != ',' && p_c2[1] != ';' && p_c2[1] != '\0' )
                p_logo[i].i_delay = atoi( p_c2+1 );
            *p_c2 = '\0';
            if( ( p_c2 = strchr( p_c2+1, ',' ) )
                && ( p_c2 < p_c || !p_c ) && p_c2[1] != ';' && p_c2[1] != '\0' )
                p_logo[i].i_alpha = atoi( p_c2 + 1 );
        }
        else
        {
            /* <logo> type */
            if( p_c ) *p_c = '\0';
        }

        p_logo[i].psz_file = strdup( psz_list );
        p_logo[i].p_pic = LoadImage( p_this, p_logo[i].psz_file );

        if( !p_logo[i].p_pic )
        {
            msg_Warn( p_this, "error while loading logo %s, will be skipped",
                      p_logo[i].psz_file );
        }

        if( p_c ) psz_list = p_c + 1;
    }

    for( i = 0; i < p_logo_list->i_count; i++ )
    {
       msg_Dbg( p_this, "logo file name %s, delay %d, alpha %d",
                p_logo[i].psz_file, p_logo[i].i_delay, p_logo[i].i_alpha );
    }

    /* initialize so that on the first update it will wrap back to 0 */
    p_logo_list->i_counter = p_logo_list->i_count;
}

/*****************************************************************************
 * FreeLogoList
 *****************************************************************************/
#define FREE( a ) free(a);a=NULL;
void FreeLogoList( logo_list_t *p_logo_list )
{
    unsigned int i;
    if( p_logo_list->psz_filename ) FREE( p_logo_list->psz_filename );
    for( i = 0; i < p_logo_list->i_count; i++ )
    {
        logo_t *p_logo = &p_logo_list->p_logo[i];
        if( p_logo->psz_file ) FREE( p_logo->psz_file );
        if( p_logo->p_pic )
        {
            p_logo->p_pic->pf_release( p_logo->p_pic );
            p_logo->p_pic = NULL;
        }
    }
}
#undef FREE

/*****************************************************************************
 * vout_sys_t: logo video output method descriptor
 *****************************************************************************
 * This structure is part of the video output thread descriptor.
 * It describes the Invert specific properties of an output thread.
 *****************************************************************************/
struct vout_sys_t
{
    logo_list_t *p_logo_list;

    vout_thread_t *p_vout;

    filter_t *p_blend;

    int i_width, i_height;
    int pos, posx, posy;
};

/*****************************************************************************
 * Create: allocates logo video thread output method
 *****************************************************************************/
static int Create( vlc_object_t *p_this )
{
    vout_thread_t *p_vout = (vout_thread_t *)p_this;
    vout_sys_t *p_sys;
    vlc_value_t val;
    logo_list_t *p_logo_list;

    /* Allocate structure */
    p_sys = p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
    if( p_sys == NULL )
    {
        msg_Err( p_vout, "out of memory" );
        return VLC_ENOMEM;
    }
    p_logo_list = p_sys->p_logo_list = malloc( sizeof( logo_list_t ) );
    if( p_logo_list == NULL )
    {
        msg_Err( p_vout, "out of memory" );
        free( p_sys );
        return VLC_ENOMEM;