1 /*****************************************************************************
2 * spudec.c : SPU decoder thread
3 *****************************************************************************
4 * Copyright (C) 2000-2001, 2006 the VideoLAN team
7 * Authors: Sam Hocevar <sam@zoy.org>
8 * Laurent Aimar <fenrir@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_codec.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int DecoderOpen ( vlc_object_t * );
42 static int PacketizerOpen( vlc_object_t * );
43 static void Close ( vlc_object_t * );
45 #define DVDSUBTRANS_DISABLE_TEXT N_("Disable DVD subtitle transparency")
46 #define DVDSUBTRANS_DISABLE_LONGTEXT N_("Removes all transparency effects " \
47 "used in DVD subtitles.")
50 set_description( N_("DVD subtitles decoder") )
51 set_shortname( N_("DVD subtitles") )
52 set_capability( "decoder", 75 )
53 set_category( CAT_INPUT )
54 set_subcategory( SUBCAT_INPUT_SCODEC )
55 set_callbacks( DecoderOpen, Close )
57 add_bool( "dvdsub-transparency", false, NULL,
58 DVDSUBTRANS_DISABLE_TEXT, DVDSUBTRANS_DISABLE_LONGTEXT, true )
60 set_description( N_("DVD subtitles packetizer") )
61 set_capability( "packetizer", 50 )
62 set_callbacks( PacketizerOpen, Close )
65 /*****************************************************************************
67 *****************************************************************************/
68 static block_t * Reassemble( decoder_t *, block_t ** );
69 static subpicture_t * Decode ( decoder_t *, block_t ** );
70 static block_t * Packetize ( decoder_t *, block_t ** );
72 /*****************************************************************************
74 *****************************************************************************
75 * Tries to launch a decoder and return score so that the interface is able
77 *****************************************************************************/
78 static int DecoderOpen( vlc_object_t *p_this )
80 decoder_t *p_dec = (decoder_t*)p_this;
83 if( p_dec->fmt_in.i_codec != VLC_CODEC_SPU )
86 p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
88 p_sys->b_packetizer = false;
89 p_sys->b_disabletrans = var_InheritBool( p_dec, "dvdsub-transparency" );
90 p_sys->i_spu_size = 0;
92 p_sys->p_block = NULL;
94 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_CODEC_SPU );
96 p_dec->pf_decode_sub = Decode;
97 p_dec->pf_packetize = NULL;
102 /*****************************************************************************
104 *****************************************************************************
105 * Tries to launch a decoder and return score so that the interface is able
107 *****************************************************************************/
108 static int PacketizerOpen( vlc_object_t *p_this )
110 decoder_t *p_dec = (decoder_t*)p_this;
112 if( DecoderOpen( p_this ) )
116 p_dec->pf_packetize = Packetize;
117 p_dec->p_sys->b_packetizer = true;
118 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
119 p_dec->fmt_out.i_codec = VLC_CODEC_SPU;
124 /*****************************************************************************
126 *****************************************************************************/
127 static void Close( vlc_object_t *p_this )
129 decoder_t *p_dec = (decoder_t*)p_this;
130 decoder_sys_t *p_sys = p_dec->p_sys;
134 block_ChainRelease( p_sys->p_block );
140 /*****************************************************************************
142 *****************************************************************************/
143 static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
145 decoder_sys_t *p_sys = p_dec->p_sys;
146 block_t *p_spu_block;
149 p_spu_block = Reassemble( p_dec, pp_block );
156 /* FIXME: what the, we shouldn’t need to allocate 64k of buffer --sam. */
157 p_sys->i_spu = block_ChainExtract( p_spu_block, p_sys->buffer, 65536 );
158 p_sys->i_pts = p_spu_block->i_pts;
159 block_ChainRelease( p_spu_block );
161 /* Parse and decode */
162 p_spu = ParsePacket( p_dec );
165 p_sys->i_spu_size = 0;
166 p_sys->i_rle_size = 0;
168 p_sys->p_block = NULL;
173 /*****************************************************************************
175 *****************************************************************************/
176 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
178 decoder_sys_t *p_sys = p_dec->p_sys;
179 block_t *p_spu = Reassemble( p_dec, pp_block );
186 p_spu->i_dts = p_spu->i_pts;
190 p_sys->i_spu_size = 0;
191 p_sys->i_rle_size = 0;
193 p_sys->p_block = NULL;
195 return block_ChainGather( p_spu );
198 /*****************************************************************************
200 *****************************************************************************/
201 static block_t *Reassemble( decoder_t *p_dec, block_t **pp_block )
203 decoder_sys_t *p_sys = p_dec->p_sys;
206 if( pp_block == NULL || *pp_block == NULL ) return NULL;
210 if( p_sys->i_spu_size <= 0 &&
211 ( p_block->i_pts <= VLC_TS_INVALID || p_block->i_buffer < 4 ) )
213 msg_Dbg( p_dec, "invalid starting packet (size < 4 or pts <=0)" );
214 msg_Dbg( p_dec, "spu size: %d, i_pts: %"PRId64" i_buffer: %zu",
215 p_sys->i_spu_size, p_block->i_pts, p_block->i_buffer );
216 block_Release( p_block );
220 block_ChainAppend( &p_sys->p_block, p_block );
221 p_sys->i_spu += p_block->i_buffer;
223 if( p_sys->i_spu_size <= 0 )
225 p_sys->i_spu_size = ( p_block->p_buffer[0] << 8 )|
226 p_block->p_buffer[1];
227 p_sys->i_rle_size = ( ( p_block->p_buffer[2] << 8 )|
228 p_block->p_buffer[3] ) - 4;
230 /* msg_Dbg( p_dec, "i_spu_size=%d i_rle=%d",
231 p_sys->i_spu_size, p_sys->i_rle_size ); */
233 if( p_sys->i_spu_size <= 0 || p_sys->i_rle_size >= p_sys->i_spu_size )
235 p_sys->i_spu_size = 0;
236 p_sys->i_rle_size = 0;
238 p_sys->p_block = NULL;
240 block_Release( p_block );
245 if( p_sys->i_spu >= p_sys->i_spu_size )
247 /* We have a complete sub */
248 if( p_sys->i_spu > p_sys->i_spu_size )
249 msg_Dbg( p_dec, "SPU packets size=%d should be %d",
250 p_sys->i_spu, p_sys->i_spu_size );
252 return p_sys->p_block;