1 /*****************************************************************************
2 * subsdec.c : text subtitles decoder
3 *****************************************************************************
4 * Copyright (C) 2000-2001 VideoLAN
5 * $Id: subsdec.c,v 1.1 2003/10/01 22:19:57 gbazin Exp $
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
8 * Samuel Hocevar <sam@zoy.org>
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() */
29 #include <string.h> /* memcpy(), memset() */
33 #include <vlc/decoder.h>
36 #if defined(HAVE_ICONV)
43 /*****************************************************************************
44 * decoder_sys_t : decoder descriptor
45 *****************************************************************************/
48 int i_align; /* Subtitles alignment on the vout */
50 #if defined(HAVE_ICONV)
51 iconv_t iconv_handle; /* handle to iconv instance */
55 /*****************************************************************************
57 *****************************************************************************/
58 static int OpenDecoder ( vlc_object_t * );
60 static int InitDecoder ( decoder_t * );
61 static int RunDecoder ( decoder_t *, block_t * );
62 static int EndDecoder ( decoder_t * );
64 static void ParseText ( decoder_t *, block_t *, vout_thread_t * );
66 #define DEFAULT_NAME "System Default"
68 /*****************************************************************************
70 *****************************************************************************/
71 #if defined(HAVE_ICONV)
72 static char *ppsz_encodings[] = { DEFAULT_NAME, "ASCII", "UTF-8", "",
73 "ISO-8859-1", "CP1252", "MacRoman", "MacIceland","ISO-8859-15", "",
74 "ISO-8859-2", "CP1250", "MacCentralEurope", "MacCroatian", "MacRomania", "",
75 "ISO-8859-5", "CP1251", "MacCyrillic", "MacUkraine", "KOI8-R", "KOI8-U", "KOI8-RU", "",
76 "ISO-8859-6", "CP1256", "MacArabic", "",
77 "ISO-8859-7", "CP1253", "MacGreek", "",
78 "ISO-8859-8", "CP1255", "MacHebrew", "",
79 "ISO-8859-9", "CP1254", "MacTurkish", "",
80 "ISO-8859-13", "CP1257", "",
81 "ISO-2022-JP", "ISO-2022-JP-1", "ISO-2022-JP-2", "EUC-JP", "SHIFT_JIS", "",
82 "ISO-2022-CN", "ISO-2022-CN-EXT", "EUC-CN", "EUC-TW", "BIG5", "BIG5-HKSCS", "",
83 "ISO-2022-KR", "EUC-KR", "",
84 "MacThai", "KOI8-T", "",
85 "ISO-8859-3", "ISO-8859-4", "ISO-8859-10", "ISO-8859-14", "ISO-8859-16", "",
86 "CP850", "CP862", "CP866", "CP874", "CP932", "CP949", "CP950", "CP1133", "CP1258", "",
88 "UTF-7", "UTF-16", "UTF-16BE", "UTF-16LE", "UTF-32", "UTF-32BE", "UTF-32LE",
89 "C99", "JAVA", "UCS-2", "UCS-2BE", "UCS-2LE", "UCS-4", "UCS-4BE", "UCS-4LE", "",
90 "HZ", "GBK", "GB18030", "JOHAB", "ARMSCII-8",
91 "Georgian-Academy", "Georgian-PS", "TIS-620", "MuleLao-1", "VISCII", "TCVN",
92 "HPROMAN8", "NEXTSTEP", NULL };
95 #define ENCODING_TEXT N_("Subtitles text encoding")
96 #define ENCODING_LONGTEXT N_("Change the encoding used in text subtitles")
97 #define ALIGN_TEXT N_("Subtitles justification")
98 #define ALIGN_LONGTEXT N_("Change the justification of substitles (0=center, 1=left, 2=right)")
101 set_description( _("text subtitles decoder") );
102 set_capability( "decoder", 50 );
103 set_callbacks( OpenDecoder, NULL );
105 add_category_hint( N_("Subtitles"), NULL, VLC_FALSE );
106 add_integer( "subsdec-align", 0, NULL, ALIGN_TEXT, ALIGN_LONGTEXT, VLC_TRUE );
107 #if defined(HAVE_ICONV)
108 add_string_from_list( "subsdec-encoding", DEFAULT_NAME, ppsz_encodings, NULL, ENCODING_TEXT, ENCODING_LONGTEXT, VLC_FALSE );
112 /*****************************************************************************
113 * OpenDecoder: probe the decoder and return score
114 *****************************************************************************
115 * Tries to launch a decoder and return score so that the interface is able
117 *****************************************************************************/
118 static int OpenDecoder( vlc_object_t *p_this )
120 decoder_t *p_dec = (decoder_t*)p_this;
122 if( p_dec->p_fifo->i_fourcc != VLC_FOURCC('s','u','b','t') )
127 p_dec->pf_init = InitDecoder;
128 p_dec->pf_decode = RunDecoder;
129 p_dec->pf_end = EndDecoder;
131 /* Allocate the memory needed to store the decoder's structure */
133 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
135 msg_Err( p_dec, "out of memory" );
142 /*****************************************************************************
143 * InitDecoder: Initalize the decoder
144 *****************************************************************************/
145 static int InitDecoder( decoder_t *p_dec )
147 decoder_sys_t *p_sys = p_dec->p_sys;
150 var_Create( p_dec, "subsdec-align", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
151 var_Get( p_dec, "subsdec-align", &val );
152 p_sys->i_align = val.i_int;
154 #if defined(HAVE_ICONV)
155 var_Create( p_dec, "subsdec-encoding",
156 VLC_VAR_STRING | VLC_VAR_DOINHERIT );
157 var_Get( p_dec, "subsdec-encoding", &val );
158 if( !strcmp( val.psz_string, DEFAULT_NAME ) )
160 char *psz_charset =(char*)malloc( 100 );
161 vlc_current_charset( &psz_charset );
162 p_sys->iconv_handle = iconv_open( "UTF-8", psz_charset );
167 p_sys->iconv_handle = iconv_open( "UTF-8", val.psz_string );
170 if( p_sys->iconv_handle == (iconv_t)-1 )
172 msg_Warn( p_dec, "Unable to do requested conversion" );
175 if( val.psz_string ) free( val.psz_string );
181 /****************************************************************************
182 * RunDecoder: the whole thing
183 ****************************************************************************
184 * This function must be fed with complete subtitles units.
185 ****************************************************************************/
186 static int RunDecoder( decoder_t *p_dec, block_t *p_block )
188 vout_thread_t *p_vout;
190 /* Here we are dealing with text subtitles */
191 p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
194 msg_Warn( p_dec, "couldn't find a video output, trashing subtitle" );
198 ParseText( p_dec, p_block, p_vout );
199 vlc_object_release( p_vout );
204 /*****************************************************************************
205 * EndDecoder: clean up the decoder
206 *****************************************************************************/
207 static int EndDecoder( decoder_t *p_dec )
209 decoder_sys_t *p_sys = p_dec->p_sys;
210 vout_thread_t *p_vout;
212 p_vout = vlc_object_find( p_dec, VLC_OBJECT_VOUT, FIND_ANYWHERE );
213 if( p_vout != NULL && p_vout->p_subpicture != NULL )
215 subpicture_t *p_subpic;
218 for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
220 p_subpic = &p_vout->p_subpicture[i_subpic];
222 if( p_subpic != NULL &&
223 ( p_subpic->i_status == RESERVED_SUBPICTURE
224 || p_subpic->i_status == READY_SUBPICTURE ) )
226 vout_DestroySubPicture( p_vout, p_subpic );
230 if( p_vout ) vlc_object_release( p_vout );
232 #if defined(HAVE_ICONV)
233 if( p_sys->iconv_handle != (iconv_t)-1 )
235 iconv_close( p_sys->iconv_handle );
244 /*****************************************************************************
245 * ParseText: parse an text subtitle packet and send it to the video output
246 *****************************************************************************/
247 static void ParseText( decoder_t *p_dec, block_t *p_block,
248 vout_thread_t *p_vout )
250 decoder_sys_t *p_sys = p_dec->p_sys;
253 /* We cannot display a subpicture with no date */
254 if( p_block->i_pts == 0 )
256 msg_Warn( p_dec, "subtitle without a date" );
260 /* Check validity of packet data */
261 if( p_block->i_buffer <= 1 || p_block->p_buffer[0] == '\0' )
263 msg_Warn( p_dec, "empty subtitle" );
267 /* Should be resiliant against bad subtitles */
268 psz_subtitle = strndup( p_block->p_buffer, p_block->i_buffer );
270 #if defined(HAVE_ICONV)
271 if( p_sys->iconv_handle != (iconv_t)-1 )
273 char *psz_new_subtitle;
274 char *psz_convert_buffer_out, *psz_convert_buffer_in;
275 size_t ret, inbytes_left, outbytes_left;
277 psz_new_subtitle = malloc( 6 * strlen( psz_subtitle ) );
278 psz_convert_buffer_out = psz_new_subtitle;
279 psz_convert_buffer_in = psz_subtitle;
280 inbytes_left = strlen( psz_subtitle );
281 outbytes_left = 6 * inbytes_left;
282 ret = iconv( p_sys->iconv_handle, &psz_convert_buffer_in,
283 &inbytes_left, &psz_convert_buffer_out, &outbytes_left );
284 *psz_convert_buffer_out = '\0';
288 msg_Warn( p_dec, "Something fishy happened during conversion" );
292 free( psz_subtitle );
293 psz_subtitle = psz_new_subtitle;
298 vout_ShowTextAbsolute( p_vout, psz_subtitle, NULL,
299 OSD_ALIGN_BOTTOM | p_sys->i_align,
300 p_sys->i_align ? 20 : 0, 10,
301 p_block->i_pts, p_block->i_dts );
303 free( psz_subtitle );