1 /*****************************************************************************
2 * spudec.c : SPU decoder thread
3 *****************************************************************************
4 * Copyright (C) 2000-2001 VideoLAN
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 *****************************************************************************/
30 #include <vlc/decoder.h>
34 /*****************************************************************************
36 *****************************************************************************/
37 static int DecoderOpen ( vlc_object_t * );
38 static int PacketizerOpen( vlc_object_t * );
40 static void Close ( vlc_object_t * );
43 set_description( _("DVD subtitles decoder") );
44 set_capability( "decoder", 50 );
45 set_callbacks( DecoderOpen, Close );
48 set_description( _("DVD subtitles packetizer") );
49 set_capability( "packetizer", 50 );
50 set_callbacks( PacketizerOpen, Close );
53 /*****************************************************************************
55 *****************************************************************************/
56 static vout_thread_t *FindVout( decoder_t *);
58 static block_t *Reassemble( decoder_t *, block_t ** );
60 static void Decode ( decoder_t *, block_t ** );
61 static block_t *Packetize( decoder_t *, block_t ** );
63 /*****************************************************************************
65 *****************************************************************************
66 * Tries to launch a decoder and return score so that the interface is able
68 *****************************************************************************/
69 static int DecoderOpen( vlc_object_t *p_this )
71 decoder_t *p_dec = (decoder_t*)p_this;
74 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 's','p','u',' ' ) &&
75 p_dec->fmt_in.i_codec != VLC_FOURCC( 's','p','u','b' ) )
80 p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
82 p_sys->b_packetizer = VLC_FALSE;
83 p_sys->i_spu_size = 0;
85 p_sys->p_block = NULL;
88 es_format_Init( &p_dec->fmt_out, SPU_ES, VLC_FOURCC( 's','p','u',' ' ) );
90 p_dec->pf_decode_sub = Decode;
91 p_dec->pf_packetize = Packetize;
96 /*****************************************************************************
98 *****************************************************************************
99 * Tries to launch a decoder and return score so that the interface is able
101 *****************************************************************************/
102 static int PacketizerOpen( vlc_object_t *p_this )
104 decoder_t *p_dec = (decoder_t*)p_this;
106 if( DecoderOpen( p_this ) )
110 p_dec->p_sys->b_packetizer = VLC_TRUE;
115 /*****************************************************************************
117 *****************************************************************************/
118 static void Close( vlc_object_t *p_this )
120 decoder_t *p_dec = (decoder_t*)p_this;
121 decoder_sys_t *p_sys = p_dec->p_sys;
123 if( !p_sys->b_packetizer )
125 /* FIXME check if it's ok to not lock vout */
126 if( p_sys->p_vout != NULL && p_sys->p_vout->p_subpicture != NULL )
128 subpicture_t * p_subpic;
131 for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
133 p_subpic = &p_sys->p_vout->p_subpicture[i_subpic];
135 if( p_subpic != NULL &&
136 ( ( p_subpic->i_status == RESERVED_SUBPICTURE ) ||
137 ( p_subpic->i_status == READY_SUBPICTURE ) ) )
139 vout_DestroySubPicture( p_sys->p_vout, p_subpic );
147 block_ChainRelease( p_sys->p_block );
153 /*****************************************************************************
155 *****************************************************************************/
156 static void Decode( decoder_t *p_dec, block_t **pp_block )
158 decoder_sys_t *p_sys = p_dec->p_sys;
159 block_t *p_spu = Reassemble( p_dec, pp_block );
160 vout_thread_t *p_last_vout = p_dec->p_sys->p_vout;
164 p_sys->i_spu = block_ChainExtract( p_spu, p_sys->buffer, 65536 );
165 p_sys->i_pts = p_spu->i_pts;
166 block_ChainRelease( p_spu );
168 if( ( p_sys->p_vout = FindVout( p_dec ) ) )
170 if( p_last_vout != p_sys->p_vout )
172 p_sys->i_subpic_channel =
173 vout_RegisterOSDChannel( p_sys->p_vout );
176 /* Parse and decode */
177 E_(ParsePacket)( p_dec );
179 vlc_object_release( p_sys->p_vout );
183 p_sys->i_spu_size = 0;
184 p_sys->i_rle_size = 0;
186 p_sys->p_block = NULL;
190 /*****************************************************************************
192 *****************************************************************************/
193 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
195 decoder_sys_t *p_sys = p_dec->p_sys;
196 block_t *p_spu = Reassemble( p_dec, pp_block );
200 p_spu->i_dts = p_spu->i_pts;
204 p_sys->i_spu_size = 0;
205 p_sys->i_rle_size = 0;
207 p_sys->p_block = NULL;
209 return block_ChainGather( p_spu );
214 /*****************************************************************************
216 *****************************************************************************/
217 static block_t *Reassemble( decoder_t *p_dec, block_t **pp_block )
219 decoder_sys_t *p_sys = p_dec->p_sys;
222 if( pp_block == NULL || *pp_block == NULL )
229 if( p_sys->i_spu_size <= 0 && ( p_block->i_pts <= 0 || p_block->i_buffer < 4 ) )
231 msg_Dbg( p_dec, "invalid starting packet (size < 4 or pts <=0)" );
232 msg_Dbg( p_dec, "spu size: %d, i_pts: "I64Fd" i_buffer: %d", p_sys->i_spu_size, p_block->i_pts, p_block->i_buffer );
233 block_Release( p_block );
237 block_ChainAppend( &p_sys->p_block, p_block );
238 p_sys->i_spu += p_block->i_buffer;
240 if( p_sys->i_spu_size <= 0 )
242 p_sys->i_spu_size = ( p_block->p_buffer[0] << 8 )| p_block->p_buffer[1];
243 p_sys->i_rle_size = ( ( p_block->p_buffer[2] << 8 )| p_block->p_buffer[3] ) - 4;
245 /* msg_Dbg( p_dec, "i_spu_size=%d i_rle=%d",
246 p_sys->i_spu_size, p_sys->i_rle_size ); */
247 if( p_sys->i_spu_size <= 0 || p_sys->i_rle_size >= p_sys->i_spu_size )
249 p_sys->i_spu_size = 0;
250 p_sys->i_rle_size = 0;
252 p_sys->p_block = NULL;
254 block_Release( p_block );
259 if( p_sys->i_spu >= p_sys->i_spu_size )
261 /* We have a complete sub */
262 msg_Dbg( p_dec, "SPU packets size=%d should be %d",
263 p_sys->i_spu, p_sys->i_spu_size );
265 return p_sys->p_block;
270 /* following functions are local */
272 /*****************************************************************************
273 * FindVout: Find a vout or wait for one to be created.
274 *****************************************************************************/
275 static vout_thread_t *FindVout( decoder_t *p_dec )
277 vout_thread_t *p_vout = NULL;
279 /* Find an available video output */
282 if( p_dec->b_die || p_dec->b_error )
287 p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
293 msleep( VOUT_OUTMEM_SLEEP );