Commit 46e1689c authored by sigmunau's avatar sigmunau
Browse files

Added a csri based renderer/decoder for ass/ssa subtitles. Can use

libass and asa as rendering backends. By equinox. Part of Google
Summer of Code
parent a6cf78b2
......@@ -29,6 +29,7 @@ SOURCES_fake = fake.c
SOURCES_realaudio = realaudio.c
SOURCES_sdl_image = sdl_image.c
SOURCES_zvbi = zvbi.c
SOURCES_csri = csri.c
SOURCES_cdg = cdg.c
SOURCES_fluidsynth = fluidsynth.c
SOURCES_cc = cc.c cc.h
/*****************************************************************************
* csri.c : Load CSRI subtitle renderer
*****************************************************************************
* Copyright (C) 2007 the VideoLAN team
* $Id$
*
* Authors: David Lamparter <equinox@videolan.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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_LINUX_LIMITS_H
# include <linux/limits.h>
#endif
#include "config.h"
#include <vlc/vlc.h>
#include <vlc_vout.h>
#include <vlc_codec.h>
#include <vlc_osd.h>
#include <vlc_block.h>
#include <vlc_filter.h>
#include <vlc_stream.h>
#include <vlc_xml.h>
#include <math.h>
#ifdef HAVE_ERRNO_H
# include <errno.h>
#endif
#include <csri/csri.h>
#include <csri/stream.h>
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy( vlc_object_t * );
static subpicture_t *DecodeBlock( decoder_t *, block_t ** );
static void DestroySubpicture( subpicture_t * );
static void PreRender( video_format_t *, spu_t *, subpicture_t *, mtime_t );
static subpicture_region_t *UpdateRegions( video_format_t *, spu_t *,
subpicture_t *, mtime_t );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_shortname( _("Subtitles (advanced)"));
set_description( _("Wrapper for subtitle renderers using CSRI/asa") );
set_capability( "decoder", 60 );
set_category( CAT_INPUT );
set_subcategory( SUBCAT_INPUT_SCODEC );
set_callbacks( Create, Destroy );
vlc_module_end();
/*****************************************************************************
* decoder_sys_t: filter data
*****************************************************************************/
struct decoder_sys_t
{
subpicture_t *p_spu_final;
video_format_t fmt_cached;
csri_inst *p_instance;
void (*pf_push_packet)(csri_inst *inst, const void *packet,
size_t packetlen, double pts_start,
double pts_end);
};
struct subpicture_sys_t
{
decoder_t *p_dec;
void *p_subs_data;
int i_subs_len;
};
/*****************************************************************************
* Create: Open CSRI renderer
*****************************************************************************
* Comment me.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys;
csri_rend *p_render;
struct csri_stream_ext *p_streamext;
if( p_dec->fmt_in.i_codec != VLC_FOURCC('s','s','a',' ') )
{
return VLC_EGENERIC;
}
p_render = csri_renderer_default();
if (!p_render)
{
msg_Err( p_dec, "can't load csri renderer" );
return VLC_EGENERIC;
}
p_streamext = csri_query_ext(p_render, CSRI_EXT_STREAM_ASS);
if (!p_streamext)
{
msg_Err( p_dec, "csri renderer does not support ASS streaming" );
return VLC_EGENERIC;
}
p_dec->pf_decode_sub = DecodeBlock;
p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
if( !p_sys )
{
msg_Err( p_dec, "out of memory" );
return VLC_ENOMEM;
}
memset( &p_dec->p_sys->fmt_cached, 0, sizeof( p_dec->p_sys->fmt_cached ) );
p_sys->pf_push_packet = p_streamext->push_packet;
p_sys->p_instance = p_streamext->init_stream(p_render,
p_dec->fmt_in.p_extra,
p_dec->fmt_in.i_extra - 1,
NULL);
return VLC_SUCCESS;
}
/*****************************************************************************
* Destroy: finish
*****************************************************************************
* Comment me.
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
filter_sys_t *p_sys = p_filter->p_sys;
free( p_sys );
}
/****************************************************************************
* DecodeBlock: the whole thing
****************************************************************************
* This function must be fed with complete subtitles units.
****************************************************************************/
static subpicture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
subpicture_t *p_spu = NULL;
block_t *p_block;
msg_Dbg( p_dec, "DecodeBlock %p", (void *)pp_block);
if( !pp_block || *pp_block == NULL ) return NULL;
p_block = *pp_block;
if( p_block->i_buffer == 0 || p_block->p_buffer[0] == '\0' ) return NULL;
p_spu = p_dec->pf_spu_buffer_new( p_dec );
if( !p_spu )
{
msg_Warn( p_dec, "can't get spu buffer" );
block_Release( *pp_block );
*pp_block = NULL;
return NULL;
}
p_spu->p_sys = malloc( sizeof( subpicture_sys_t ));
if( !p_spu->p_sys )
{
msg_Err( p_dec, "out of memory" );
p_dec->pf_spu_buffer_del( p_dec, p_spu );
block_Release( *pp_block );
*pp_block = NULL;
return NULL;
}
p_spu->p_sys->p_dec = p_dec;
p_spu->p_sys->i_subs_len = p_block->i_buffer;
p_spu->p_sys->p_subs_data = malloc( p_block->i_buffer );
if( !p_spu->p_sys->p_subs_data )
{
msg_Err( p_dec, "out of memory" );
free( p_spu->p_sys );
p_dec->pf_spu_buffer_del( p_dec, p_spu );
block_Release( *pp_block );
*pp_block = NULL;
return NULL;
}
memcpy( p_spu->p_sys->p_subs_data, p_block->p_buffer,
p_block->i_buffer );
p_spu->i_x = 0;
p_spu->i_y = 0;
p_spu->i_start = p_block->i_pts;
p_spu->i_stop = p_block->i_pts + p_block->i_length;
p_spu->b_ephemer = VLC_FALSE;
p_spu->b_absolute = VLC_FALSE;
p_spu->b_pausable = VLC_TRUE;
msg_Dbg( p_dec, "BS %lf..%lf", p_spu->i_start * 0.000001, p_spu->i_stop * 0.000001);
p_dec->p_sys->pf_push_packet(p_dec->p_sys->p_instance,
p_spu->p_sys->p_subs_data, p_block->i_buffer,
p_spu->i_start * 0.000001,
p_spu->i_stop * 0.000001);
p_spu->pf_pre_render = PreRender;
p_spu->pf_update_regions = UpdateRegions;
p_spu->pf_destroy = DestroySubpicture;
block_Release( *pp_block );
*pp_block = NULL;
return p_spu;
}
static void DestroySubpicture( subpicture_t *p_subpic )
{
msg_Dbg( p_subpic->p_sys->p_dec, "drop spu %p", (void *)p_subpic );
free( p_subpic->p_sys->p_subs_data );
free( p_subpic->p_sys );
}
static void PreRender( video_format_t *p_fmt, spu_t *p_spu,
subpicture_t *p_subpic, mtime_t ts )
{
decoder_t *p_dec = p_subpic->p_sys->p_dec;
p_dec->p_sys->p_spu_final = p_subpic;
}
static subpicture_region_t *UpdateRegions( video_format_t *p_fmt, spu_t *p_spu,
subpicture_t *p_subpic, mtime_t ts )
{
decoder_t *p_dec = p_subpic->p_sys->p_dec;
subpicture_region_t *p_spu_region;
video_format_t fmt;
struct csri_frame csri_frame;
if (p_subpic != p_dec->p_sys->p_spu_final)
{
return NULL;
}
memcpy( &fmt, p_fmt, sizeof( fmt ) );
fmt.i_chroma = VLC_FOURCC('R','G','B','A');
fmt.i_width = fmt.i_visible_width;
fmt.i_height = fmt.i_visible_height;
fmt.i_bits_per_pixel = 0;
fmt.i_x_offset = fmt.i_y_offset = 0;
if (memcmp(&fmt, &p_dec->p_sys->fmt_cached, sizeof(fmt)))
{
struct csri_fmt csri_fmt;
memset(&csri_fmt, 0, sizeof(csri_fmt));
csri_fmt.pixfmt = CSRI_F_RGBA;
csri_fmt.width = fmt.i_width;
csri_fmt.height = fmt.i_height;
if( csri_request_fmt(p_dec->p_sys->p_instance, &csri_fmt) )
msg_Dbg( p_dec, "csri error: format not supported" );
memcpy(&p_dec->p_sys->fmt_cached, &fmt, sizeof(fmt));
}
p_spu_region = p_subpic->pf_create_region( VLC_OBJECT(p_dec), &fmt );
p_spu_region->i_align = SUBPICTURE_ALIGN_TOP;
csri_frame.pixfmt = CSRI_F_RGBA;
csri_frame.planes[0] = (unsigned char*)p_spu_region->picture.Y_PIXELS;
csri_frame.strides[0] = p_spu_region->picture.Y_PITCH;
msg_Dbg( p_dec, "TS %lf", ts * 0.000001 );
csri_render( p_dec->p_sys->p_instance, &csri_frame, ts * 0.000001 );
memset(p_spu_region->picture.Y_PIXELS, 0xff, fmt.i_width);
memset(p_spu_region->picture.Y_PIXELS + p_spu_region->picture.Y_PITCH
* (fmt.i_height - 1), 0x88, fmt.i_width);
p_subpic->p_region = p_spu_region;
return p_spu_region;
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment