1 /*****************************************************************************
2 * spudec.c : SPU decoder thread
3 *****************************************************************************
4 * Copyright (C) 2000-2001 VideoLAN
5 * $Id: spudec.c,v 1.28 2003/11/22 19:55:47 fenrir Exp $
7 * Authors: Samuel 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
32 #include <vlc/decoder.h>
33 #include <vlc/input.h>
37 /*****************************************************************************
39 *****************************************************************************/
40 static int DecoderOpen ( vlc_object_t * );
41 static int PacketizerOpen( vlc_object_t * );
43 static void Close ( vlc_object_t * );
46 set_description( _("DVD subtitles decoder") );
47 set_capability( "decoder", 50 );
48 set_callbacks( DecoderOpen, Close );
51 set_description( _("DVD subtitles packetizer") );
52 set_capability( "decoder", 50 );
53 set_callbacks( PacketizerOpen, Close );
56 /*****************************************************************************
58 *****************************************************************************/
59 static vout_thread_t *FindVout( decoder_t *);
61 static block_t *Reassemble( decoder_t *, block_t ** );
63 static void Decode ( decoder_t *, block_t ** );
64 static block_t *Packetize( decoder_t *, block_t ** );
66 /*****************************************************************************
68 *****************************************************************************
69 * Tries to launch a decoder and return score so that the interface is able
71 *****************************************************************************/
72 static int DecoderOpen( vlc_object_t *p_this )
74 decoder_t *p_dec = (decoder_t*)p_this;
77 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 's','p','u',' ' ) &&
78 p_dec->fmt_in.i_codec != VLC_FOURCC( 's','p','u','b' ) )
83 p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
85 p_sys->b_packetizer = VLC_FALSE;
86 p_sys->i_spu_size = 0;
88 p_sys->p_block = NULL;
91 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 's','p','u',' ' ) );
93 p_dec->pf_decode_sub = Decode;
94 p_dec->pf_packetize = Packetize;
99 /*****************************************************************************
101 *****************************************************************************
102 * Tries to launch a decoder and return score so that the interface is able
104 *****************************************************************************/
105 static int PacketizerOpen( vlc_object_t *p_this )
107 decoder_t *p_dec = (decoder_t*)p_this;
109 if( DecoderOpen( p_this ) )
113 p_dec->p_sys->b_packetizer = VLC_TRUE;
118 /*****************************************************************************
120 *****************************************************************************/
121 static void Close( vlc_object_t *p_this )
123 decoder_t *p_dec = (decoder_t*)p_this;
124 decoder_sys_t *p_sys = p_dec->p_sys;
126 if( !p_sys->b_packetizer )
128 /* FIXME check if it's ok to not lock vout */
129 if( p_sys->p_vout != NULL && p_sys->p_vout->p_subpicture != NULL )
131 subpicture_t * p_subpic;
134 for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
136 p_subpic = &p_sys->p_vout->p_subpicture[i_subpic];
138 if( p_subpic != NULL &&
139 ( ( p_subpic->i_status == RESERVED_SUBPICTURE ) ||
140 ( p_subpic->i_status == READY_SUBPICTURE ) ) )
142 vout_DestroySubPicture( p_sys->p_vout, p_subpic );
150 block_ChainRelease( p_sys->p_block );
156 /*****************************************************************************
158 *****************************************************************************/
159 static void Decode ( decoder_t *p_dec, block_t **pp_block )
161 decoder_sys_t *p_sys = p_dec->p_sys;
162 block_t *p_spu = Reassemble( p_dec, pp_block );
166 p_sys->i_spu = block_ChainExtract( p_spu, p_sys->buffer, 65536 );
167 p_sys->i_pts = p_spu->i_pts;
168 block_ChainRelease( p_spu );
170 if( ( p_sys->p_vout = FindVout( p_dec ) ) )
172 /* Parse and decode */
173 E_(ParsePacket)( p_dec );
175 vlc_object_release( p_sys->p_vout );
179 p_sys->i_spu_size = 0;
180 p_sys->i_rle_size = 0;
182 p_sys->p_block = NULL;
186 /*****************************************************************************
188 *****************************************************************************/
189 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
191 decoder_sys_t *p_sys = p_dec->p_sys;
192 block_t *p_spu = Reassemble( p_dec, pp_block );
197 p_sys->i_spu_size = 0;
198 p_sys->i_rle_size = 0;
200 p_sys->p_block = NULL;
202 return block_ChainGather( p_spu );
207 /*****************************************************************************
209 *****************************************************************************/
210 static block_t *Reassemble( decoder_t *p_dec, block_t **pp_block )
212 decoder_sys_t *p_sys = p_dec->p_sys;
215 if( pp_block == NULL || *pp_block == NULL )
222 if( p_sys->i_spu_size <= 0 && ( p_block->i_pts <= 0 || p_block->i_buffer < 4 ) )
224 msg_Dbg( p_dec, "invalid starting packet (size < 4 or pts <=0)" );
225 block_Release( p_block );
229 block_ChainAppend( &p_sys->p_block, p_block );
230 p_sys->i_spu += p_block->i_buffer;
232 if( p_sys->i_spu_size <= 0 )
234 p_sys->i_spu_size = ( p_block->p_buffer[0] << 8 )| p_block->p_buffer[1];
235 p_sys->i_rle_size = ( ( p_block->p_buffer[2] << 8 )| p_block->p_buffer[3] ) - 4;
237 msg_Dbg( p_dec, "i_spu_size=%d i_rle=%d", p_sys->i_spu_size, p_sys->i_rle_size );
239 if( p_sys->i_spu_size <= 0 || p_sys->i_rle_size >= p_sys->i_spu_size )
241 p_sys->i_spu_size = 0;
242 p_sys->i_rle_size = 0;
244 p_sys->p_block = NULL;
246 block_Release( p_block );
251 if( p_sys->i_spu >= p_sys->i_spu_size )
253 /* We have a complete sub */
254 block_t *p_ret = p_sys->p_block;
256 msg_Dbg( p_dec, "SPU packets size=%d should be %d",
257 p_sys->i_spu, p_sys->i_spu_size );
263 /* following functions are local */
265 /*****************************************************************************
266 * FindVout: Find a vout or wait for one to be created.
267 *****************************************************************************/
268 static vout_thread_t *FindVout( decoder_t *p_dec )
270 vout_thread_t *p_vout = NULL;
272 /* Find an available video output */
275 if( p_dec->b_die || p_dec->b_error )
280 p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
286 msleep( VOUT_OUTMEM_SLEEP );