vlc/src/control/video.c

/*****************************************************************************
 * video.c: libvlc new API video functions
 *****************************************************************************
 * Copyright (C) 2005 the VideoLAN team
 *
 * $Id$
 *
 * Authors: Clément Stenac <zorglub@videolan.org>
 *          Filippo Carone <littlejohn@videolan.org>
 *          Jean-Paul Saman <jpsaman _at_ m2x _dot_ nl>
 *          Damien Fouilleul <damienf a_t videolan dot org>
 *
 * 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.
 *****************************************************************************/

#include <vlc/libvlc.h>
#include <vlc/libvlc_media.h>
#include <vlc/libvlc_media_player.h>

#include <vlc_common.h>
#include <vlc_input.h>
#include <vlc_vout.h>

#include "media_player_internal.h"

/*
 * Remember to release the returned vout_thread_t.
 */
static vout_thread_t *GetVout( libvlc_media_player_t *p_mi,
                               libvlc_exception_t *p_exception )
{
    input_thread_t *p_input = libvlc_get_input_thread( p_mi, p_exception );
    vout_thread_t *p_vout = NULL;

    if( p_input )
    {
        p_vout = input_GetVout( p_input );
        if( !p_vout )
        {
            libvlc_exception_raise( p_exception, "No active video output" );
        }
        vlc_object_release( p_input );
    }
    return p_vout;
}

/**********************************************************************
 * Exported functions
 **********************************************************************/

void libvlc_set_fullscreen( libvlc_media_player_t *p_mi, int b_fullscreen,
                            libvlc_exception_t *p_e )
{
    /* We only work on the first vout */
    vout_thread_t *p_vout = GetVout( p_mi, p_e );

    /* GetVout will raise the exception for us */
    if( !p_vout ) return;

    var_SetBool( p_vout, "fullscreen", b_fullscreen );

    vlc_object_release( p_vout );
}

int libvlc_get_fullscreen( libvlc_media_player_t *p_mi,
                            libvlc_exception_t *p_e )
{
    /* We only work on the first vout */
    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    int i_ret;

    /* GetVout will raise the exception for us */
    if( !p_vout ) return 0;

    i_ret = var_GetBool( p_vout, "fullscreen" );

    vlc_object_release( p_vout );

    return i_ret;
}

void libvlc_toggle_fullscreen( libvlc_media_player_t *p_mi,
                               libvlc_exception_t *p_e )
{
    /* We only work on the first vout */
    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    bool ret;

    /* GetVout will raise the exception for us */
    if( !p_vout ) return;

    ret = var_GetBool( p_vout, "fullscreen" );
    var_SetBool( p_vout, "fullscreen", !ret );

    vlc_object_release( p_vout );
}

void
libvlc_video_take_snapshot( libvlc_media_player_t *p_mi, const char *psz_filepath,
        unsigned int i_width, unsigned int i_height, libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout;

    /* The filepath must be not NULL */
    if( !psz_filepath )
    {
        libvlc_exception_raise( p_e, "filepath is null" );
        return;
    }
    /* We must have an input */
    if( !p_mi->p_input_thread )
    {
        libvlc_exception_raise( p_e, "Input does not exist" );
        return;
    }

    /* GetVout will raise the exception for us */
    p_vout = GetVout( p_mi, p_e );
    if( !p_vout ) return;

    var_SetInteger( p_vout, "snapshot-width", i_width );
    var_SetInteger( p_vout, "snapshot-height", i_height );

    var_SetString( p_vout, "snapshot-path", psz_filepath );
    var_SetString( p_vout, "snapshot-format", "png" );

    var_TriggerCallback( p_vout, "video-snapshot" );
    vlc_object_release( p_vout );
}

int libvlc_video_get_height( libvlc_media_player_t *p_mi,
                             libvlc_exception_t *p_e )
{
    int height;

    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    if( !p_vout ) return 0;

    height = p_vout->i_window_height;

    vlc_object_release( p_vout );

    return height;
}

int libvlc_video_get_width( libvlc_media_player_t *p_mi,
                            libvlc_exception_t *p_e )
{
    int width;

    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    if( !p_vout ) return 0;

    width = p_vout->i_window_width;

    vlc_object_release( p_vout );

    return width;
}

int libvlc_media_player_has_vout( libvlc_media_player_t *p_mi,
                                     libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread(p_mi, p_e);
    bool has_vout = false;

    if( p_input_thread )
    {
        vout_thread_t *p_vout;

        p_vout = input_GetVout( p_input_thread );
        if( p_vout )
        {
            has_vout = true;
            vlc_object_release( p_vout );
        }
        vlc_object_release( p_input_thread );
    }
    return has_vout;
}

float libvlc_video_get_scale( libvlc_media_player_t *p_mp,
                              libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout = GetVout( p_mp, p_e );
    if( !p_vout )
        return 0.;

    float f_scale = var_GetFloat( p_vout, "scale" );
    if( var_GetBool( p_vout, "autoscale" ) )
        f_scale = 0.;
    vlc_object_release( p_vout );
    return f_scale;
}

void libvlc_video_set_scale( libvlc_media_player_t *p_mp, float f_scale,
                             libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout = GetVout( p_mp, p_e );
    if( !p_vout )
        return;

    if( f_scale != 0. )
        var_SetFloat( p_vout, "scale", f_scale );
    var_SetBool( p_vout, "autoscale", f_scale != 0. );
    vlc_object_release( p_vout );
}

char *libvlc_video_get_aspect_ratio( libvlc_media_player_t *p_mi,
                                     libvlc_exception_t *p_e )
{
    char *psz_aspect = 0;
    vout_thread_t *p_vout = GetVout( p_mi, p_e );

    if( !p_vout ) return 0;

    psz_aspect = var_GetNonEmptyString( p_vout, "aspect-ratio" );
    vlc_object_release( p_vout );
    return psz_aspect ? psz_aspect : strdup("");
}

void libvlc_video_set_aspect_ratio( libvlc_media_player_t *p_mi,
                                    char *psz_aspect, libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    int i_ret = -1;

    if( !p_vout ) return;

    i_ret = var_SetString( p_vout, "aspect-ratio", psz_aspect );
    if( i_ret )
        libvlc_exception_raise( p_e,
                        "Unexpected error while setting aspect-ratio value" );

    vlc_object_release( p_vout );
}

int libvlc_video_get_spu( libvlc_media_player_t *p_mi,
                          libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
    vlc_value_t val_list;
    vlc_value_t val;
    int i_spu = -1;
    int i_ret = -1;
    int i;

    if( !p_input_thread ) return -1;

    i_ret = var_Get( p_input_thread, "spu-es", &val );
    if( i_ret < 0 )
    {
        libvlc_exception_raise( p_e, "Getting subtitle information failed" );
        vlc_object_release( p_input_thread );
        return i_ret;
    }

    var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
    for( i = 0; i < val_list.p_list->i_count; i++ )
    {
        if( val.i_int == val_list.p_list->p_values[i].i_int )
        {
            i_spu = i;
            break;
        }
    }
    var_FreeList( &val_list, NULL );
    vlc_object_release( p_input_thread );
    return i_spu;
}

int libvlc_video_get_spu_count( libvlc_media_player_t *p_mi,
                                libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
    int i_spu_count;

    if( !p_input_thread )
        return -1;

    i_spu_count = var_CountChoices( p_input_thread, "spu-es" );

    vlc_object_release( p_input_thread );
    return i_spu_count;
}

libvlc_track_description_t *
        libvlc_video_get_spu_description( libvlc_media_player_t *p_mi,
                                          libvlc_exception_t *p_e )
{
    return libvlc_get_track_description( p_mi, "spu-es", p_e);
}

void libvlc_video_set_spu( libvlc_media_player_t *p_mi, int i_spu,
                           libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
    vlc_value_t val_list;
    vlc_value_t newval;
    int i_ret = -1;

    if( !p_input_thread ) return;

    var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );

    if( val_list.p_list->i_count == 0 )
    {
        libvlc_exception_raise( p_e, "Subtitle value out of range" );
        goto end;
    }

    if( (i_spu < 0) && (i_spu > val_list.p_list->i_count) )
    {
        libvlc_exception_raise( p_e, "Subtitle value out of range" );
        goto end;
    }

    newval = val_list.p_list->p_values[i_spu];
    i_ret = var_Set( p_input_thread, "spu-es", newval );
    if( i_ret < 0 )
    {
        libvlc_exception_raise( p_e, "Setting subtitle value failed" );
    }

end:
    var_FreeList( &val_list, NULL );
    vlc_object_release( p_input_thread );
}

int libvlc_video_set_subtitle_file( libvlc_media_player_t *p_mi,
                                    char *psz_subtitle,
                                    libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
    bool b_ret = false;

    if( p_input_thread )
    {
        if( !input_AddSubtitle( p_input_thread, psz_subtitle, true ) )
            b_ret = true;
        vlc_object_release( p_input_thread );
    }
    return b_ret;
}

libvlc_track_description_t *
        libvlc_video_get_title_description( libvlc_media_player_t *p_mi,
                                            libvlc_exception_t * p_e )
{
    return libvlc_get_track_description( p_mi, "title", p_e);
}

libvlc_track_description_t *
        libvlc_video_get_chapter_description( libvlc_media_player_t *p_mi,
                                              int i_title,
                                              libvlc_exception_t *p_e )
{
    char psz_title[12];
    sprintf( psz_title,  "title %2i", i_title );
    return libvlc_get_track_description( p_mi, psz_title, p_e);
}

char *libvlc_video_get_crop_geometry( libvlc_media_player_t *p_mi,
                                   libvlc_exception_t *p_e )
{
    char *psz_geometry = 0;
    vout_thread_t *p_vout = GetVout( p_mi, p_e );

    if( !p_vout ) return 0;

    psz_geometry = var_GetNonEmptyString( p_vout, "crop" );
    vlc_object_release( p_vout );
    return psz_geometry ? psz_geometry : strdup("");
}

void libvlc_video_set_crop_geometry( libvlc_media_player_t *p_mi,
                                    char *psz_geometry, libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    int i_ret = -1;

    if( !p_vout ) return;

    i_ret = var_SetString( p_vout, "crop", psz_geometry );
    if( i_ret )
        libvlc_exception_raise( p_e,
                        "Unexpected error while setting crop geometry" );

    vlc_object_release( p_vout );
}

int libvlc_video_get_teletext( libvlc_media_player_t *p_mi,
                               libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    vlc_object_t *p_vbi;
    int i_ret = -1;

    if( !p_vout ) return i_ret;

    p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
                                                   FIND_CHILD );
    if( p_vbi )
    {
        i_ret = var_GetInteger( p_vbi, "vbi-page" );
        vlc_object_release( p_vbi );
    }

    vlc_object_release( p_vout );
    return i_ret;
}

void libvlc_video_set_teletext( libvlc_media_player_t *p_mi, int i_page,
                                libvlc_exception_t *p_e )
{
    vout_thread_t *p_vout = GetVout( p_mi, p_e );
    vlc_object_t *p_vbi;
    int i_ret = -1;

    if( !p_vout ) return;

    p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
                                                   FIND_CHILD );
    if( p_vbi )
    {
        i_ret = var_SetInteger( p_vbi, "vbi-page", i_page );
        vlc_object_release( p_vbi );
        if( i_ret )
            libvlc_exception_raise( p_e,
                            "Unexpected error while setting teletext page" );
    }
    vlc_object_release( p_vout );
}

void libvlc_toggle_teletext( libvlc_media_player_t *p_mi,
                             libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread;
    vlc_object_t *p_vbi;
    int i_ret;

    p_input_thread = libvlc_get_input_thread(p_mi, p_e);
    if( !p_input_thread ) return;

    if( var_CountChoices( p_input_thread, "teletext-es" ) <= 0 )
    {
        vlc_object_release( p_input_thread );
        return;
    }
    const bool b_selected = var_GetInteger( p_input_thread, "teletext-es" ) >= 0;

    p_vbi = (vlc_object_t *)vlc_object_find_name( p_input_thread, "zvbi",
                                                  FIND_CHILD );
    if( p_vbi )
    {
        if( b_selected )
        {
            /* FIXME Gni, why that ? */
            i_ret = var_SetInteger( p_vbi, "vbi-page",
                                    var_GetInteger( p_vbi, "vbi-page" ) );
            if( i_ret )
                libvlc_exception_raise( p_e,
                                "Unexpected error while setting teletext page" );
        }
        else
        {
            /* FIXME Gni^2 */
            i_ret = var_SetBool( p_vbi, "vbi-opaque",
                                 !var_GetBool( p_vbi, "vbi-opaque" ) );
            if( i_ret )
                libvlc_exception_raise( p_e,
                                "Unexpected error while setting teletext transparency" );
        }
        vlc_object_release( p_vbi );
    }
    else if( b_selected )
    {
        var_SetInteger( p_input_thread, "spu-es", -1 );
    }
    else
    {
        vlc_value_t list;
        if( !var_Change( p_input_thread, "teletext-es", VLC_VAR_GETLIST, &list, NULL ) )
        {
            if( list.p_list->i_count > 0 )
                var_SetInteger( p_input_thread, "spu-es", list.p_list->p_values[0].i_int );

            var_FreeList( &list, NULL );
        }
    }
    vlc_object_release( p_input_thread );
}

int libvlc_video_get_track_count( libvlc_media_player_t *p_mi,
                                  libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
    int i_track_count;

    if( !p_input_thread )
        return -1;

    i_track_count = var_CountChoices( p_input_thread, "video-es" );

    vlc_object_release( p_input_thread );
    return i_track_count;
}

libvlc_track_description_t *
        libvlc_video_get_track_description( libvlc_media_player_t *p_mi,
                                            libvlc_exception_t *p_e )
{
    return libvlc_get_track_description( p_mi, "video-es", p_e);
}

int libvlc_video_get_track( libvlc_media_player_t *p_mi,
                            libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
    vlc_value_t val_list;
    vlc_value_t val;
    int i_track = -1;
    int i_ret = -1;
    int i;

    if( !p_input_thread )
        return -1;

    i_ret = var_Get( p_input_thread, "video-es", &val );
    if( i_ret < 0 )
    {
        libvlc_exception_raise( p_e, "Getting Video track information failed" );
        vlc_object_release( p_input_thread );
        return i_ret;
    }

    var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
    for( i = 0; i < val_list.p_list->i_count; i++ )
    {
        if( val_list.p_list->p_values[i].i_int == val.i_int )
        {
            i_track = i;
            break;
        }
    }
    var_FreeList( &val_list, NULL );
    vlc_object_release( p_input_thread );
    return i_track;
}

void libvlc_video_set_track( libvlc_media_player_t *p_mi, int i_track,
                             libvlc_exception_t *p_e )
{
    input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
    vlc_value_t val_list;
    int i_ret = -1;
    int i;

    if( !p_input_thread )
        return;

    var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
    for( i = 0; i < val_list.p_list->i_count; i++ )
    {
        vlc_value_t val = val_list.p_list->p_values[i];
        if( i_track == val.i_int )
        {
            i_ret = var_Set( p_input_thread, "audio-es", val );
            if( i_ret < 0 )
                libvlc_exception_raise( p_e, "Setting video track failed" );
            goto end;
        }
    }
    libvlc_exception_raise( p_e, "Video track out of range" );

end:
    var_FreeList( &val_list, NULL );
    vlc_object_release( p_input_thread );
}