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@ -1,10 +1,11 @@ |
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/*****************************************************************************
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* video_text.c : text manipulation functions |
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* video_text.c : OSD text manipulation functions |
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***************************************************************************** |
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* Copyright (C) 1999-2007 the VideoLAN team |
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* Copyright (C) 1999-2010 the VideoLAN team |
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* $Id$ |
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* |
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* Author: Sigmund Augdal Helberg <dnumgis@videolan.org> |
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* Laurent Aimar <fenrir _AT_ videolan _DOT_ org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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@ -28,98 +29,110 @@ |
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#include <vlc_common.h> |
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#include <vlc_vout.h> |
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#include <vlc_block.h> |
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#include <vlc_filter.h> |
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#include <vlc_osd.h> |
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/* TODO remove access to private vout data */ |
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#include "vout_internal.h" |
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/**
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* \brief Show text on the video from a given start date to a given end date |
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* \param p_vout pointer to the vout the text is to be showed on |
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* \param i_channel Subpicture channel |
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* \param psz_string The text to be shown |
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* \param p_style Pointer to a struct with text style info (it is duplicated if non NULL) |
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* \param i_flags flags for alignment and such |
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* \param i_hmargin horizontal margin in pixels |
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* \param i_vmargin vertical margin in pixels |
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* \param i_duration Amount of time the text is to be shown. |
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*/ |
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int vout_ShowTextRelative( vout_thread_t *p_vout, int i_channel, |
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const char *psz_string, const text_style_t *p_style, |
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int i_flags, int i_hmargin, int i_vmargin, |
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mtime_t i_duration ) |
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#include <vlc_vout_osd.h> |
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struct subpicture_updater_sys_t { |
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int position; |
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char *text; |
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}; |
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static int OSDTextValidate(subpicture_t *subpic, |
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bool has_src_changed, const video_format_t *fmt_src, |
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bool has_dst_changed, const video_format_t *fmt_dst, |
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mtime_t ts) |
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{ |
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VLC_UNUSED(subpic); VLC_UNUSED(ts); VLC_UNUSED(fmt_src); |
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VLC_UNUSED(has_dst_changed); VLC_UNUSED(fmt_dst); |
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if( !has_src_changed && !has_dst_changed) |
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return VLC_SUCCESS; |
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return VLC_EGENERIC; |
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} |
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static void OSDTextUpdate(subpicture_t *subpic, |
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const video_format_t *fmt_src, |
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const video_format_t *fmt_dst, |
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mtime_t ts) |
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{ |
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subpicture_t *p_spu; |
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subpicture_updater_sys_t *sys = subpic->updater.p_sys; |
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VLC_UNUSED(fmt_dst); VLC_UNUSED(ts); |
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subpic->i_original_picture_width = fmt_src->i_width; |
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subpic->i_original_picture_height = fmt_src->i_height; |
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video_format_t fmt; |
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video_format_Init( &fmt, VLC_CODEC_TEXT); |
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fmt.i_sar_num = 0; |
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fmt.i_sar_den = 1; |
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if( !psz_string ) return VLC_EGENERIC; |
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p_spu = subpicture_New( NULL ); |
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if( !p_spu ) |
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return VLC_EGENERIC; |
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p_spu->i_channel = i_channel; |
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p_spu->i_start = mdate(); |
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p_spu->i_stop = p_spu->i_start + i_duration; |
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p_spu->b_ephemer = true; |
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p_spu->b_absolute = false; |
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p_spu->b_fade = true; |
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/* Create a new subpicture region */ |
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memset( &fmt, 0, sizeof(video_format_t) ); |
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fmt.i_chroma = VLC_CODEC_TEXT; |
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fmt.i_width = fmt.i_height = 0; |
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fmt.i_x_offset = fmt.i_y_offset = 0; |
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p_spu->p_region = subpicture_region_New( &fmt ); |
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if( !p_spu->p_region ) |
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{ |
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msg_Err( p_vout, "cannot allocate SPU region" ); |
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subpicture_Delete( p_spu ); |
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return VLC_EGENERIC; |
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} |
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subpicture_region_t *r = subpic->p_region = subpicture_region_New(&fmt); |
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if (!r) |
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return; |
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p_spu->p_region->psz_text = strdup( psz_string ); |
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p_spu->p_region->i_align = i_flags & SUBPICTURE_ALIGN_MASK; |
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p_spu->p_region->i_x = i_hmargin; |
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p_spu->p_region->i_y = i_vmargin; |
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if( p_style ) |
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p_spu->p_region->p_style = text_style_Duplicate( p_style ); |
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r->psz_text = strdup(sys->text); |
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r->i_align = sys->position; |
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r->i_x = 30 + fmt_src->i_width |
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- fmt_src->i_visible_width |
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- fmt_src->i_x_offset; |
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r->i_y = 20 + fmt_src->i_y_offset; |
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} |
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spu_DisplaySubpicture( vout_GetSpu( p_vout ), p_spu ); |
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static void OSDTextDestroy(subpicture_t *subpic) |
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{ |
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subpicture_updater_sys_t *sys = subpic->updater.p_sys; |
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return VLC_SUCCESS; |
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free(sys->text); |
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free(sys); |
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} |
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/**
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* \brief Write an informative message at the default location, |
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* for the default duration and only if the OSD option is enabled. |
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* \param p_caller The object that called the function. |
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* \param i_channel Subpicture channel |
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* \param psz_format printf style formatting |
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**/ |
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void vout_OSDMessage( vout_thread_t *p_vout, int i_channel, |
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const char *psz_format, ... ) |
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void vout_OSDText(vout_thread_t *vout, int channel, |
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int position, mtime_t duration, const char *text) |
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{ |
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if( !var_InheritBool( p_vout, "osd" ) ) |
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assert( (position & ~SUBPICTURE_ALIGN_MASK) == 0); |
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if (!var_InheritBool(vout, "osd") || duration <= 0) |
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return; |
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subpicture_updater_sys_t *sys = malloc(sizeof(*sys)); |
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if (!sys) |
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return; |
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sys->position = position; |
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sys->text = strdup(text); |
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subpicture_updater_t updater = { |
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.pf_validate = OSDTextValidate, |
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.pf_update = OSDTextUpdate, |
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.pf_destroy = OSDTextDestroy, |
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.p_sys = sys, |
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}; |
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subpicture_t *subpic = subpicture_New(&updater); |
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if (!subpic) { |
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free(sys->text); |
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free(sys); |
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return; |
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} |
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subpic->i_channel = channel; |
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subpic->i_start = mdate(); |
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subpic->i_stop = subpic->i_start + duration; |
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subpic->b_ephemer = true; |
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subpic->b_absolute = false; |
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subpic->b_fade = true; |
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spu_DisplaySubpicture(vout_GetSpu(vout), subpic); |
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} |
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void vout_OSDMessage(vout_thread_t *vout, int channel, const char *format, ...) |
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{ |
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va_list args; |
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va_start( args, psz_format ); |
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char *psz_string; |
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if( vasprintf( &psz_string, psz_format, args ) != -1 ) |
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{ |
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vout_ShowTextRelative( p_vout, i_channel, psz_string, NULL, |
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SUBPICTURE_ALIGN_TOP|SUBPICTURE_ALIGN_RIGHT, |
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30 + p_vout->p->fmt_in.i_width |
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- p_vout->p->fmt_in.i_visible_width |
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- p_vout->p->fmt_in.i_x_offset, |
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20 + p_vout->p->fmt_in.i_y_offset, 1000000 ); |
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free( psz_string ); |
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va_start(args, format); |
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char *string; |
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if (vasprintf(&string, format, args) != -1) { |
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vout_OSDText(vout, channel, |
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SUBPICTURE_ALIGN_TOP|SUBPICTURE_ALIGN_RIGHT, 1000000, |
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string); |
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free(string); |
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} |
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va_end( args ); |
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va_end(args); |
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} |
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Laurent Aimar
16 years ago