1 /*****************************************************************************
2 * voc.c : Creative Voice File (.VOC) demux module for vlc
3 *****************************************************************************
4 * Copyright (C) 2005 VideoLAN
7 * Authors: Remi Denis-Courmont <rem # via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc/input.h>
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Open ( vlc_object_t * );
39 static void Close( vlc_object_t * );
42 set_description( _("VOC demuxer") );
43 set_category( CAT_INPUT );
44 set_subcategory( SUBCAT_INPUT_DEMUX );
45 set_capability( "demux2", 10 );
46 set_callbacks( Open, Close );
49 /*****************************************************************************
51 *****************************************************************************/
52 static int Demux ( demux_t * );
53 static int Control( demux_t *, int i_query, va_list args );
60 int64_t i_block_offset;
66 static const char ct_header[] = "Creative Voice File\x1a";
68 /*****************************************************************************
69 * Open: check file and initializes structures
70 *****************************************************************************/
71 static int Open( vlc_object_t * p_this )
73 demux_t *p_demux = (demux_t*)p_this;
76 uint16_t i_data_offset, i_version;
78 if( stream_Peek( p_demux->s, &p_buf, 26 ) < 26 )
81 if( memcmp( p_buf, ct_header, 20 ) )
85 i_data_offset = GetWLE( p_buf );
86 if ( i_data_offset < 26 /* not enough room for full VOC header */ )
90 i_version = GetWLE( p_buf );
91 if( ( i_version != 0x10A ) && ( i_version != 0x114 ) )
92 return VLC_EGENERIC; /* unknown VOC version */
95 if( GetWLE( p_buf ) != (uint16_t)(0x1234 + ~i_version) )
98 /* We have a valid VOC header */
99 msg_Dbg( p_demux, "CT Voice file v%d.%d", i_version >> 8,
102 /* skip VOC header */
103 if( stream_Read( p_demux->s, NULL, i_data_offset ) < i_data_offset )
106 p_demux->pf_demux = Demux;
107 p_demux->pf_control = Control;
108 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
113 p_sys->i_block_offset = p_sys->i_block_size = 0;
116 date_Init( &p_sys->pts, 1, 1 );
117 date_Set( &p_sys->pts, 1 );
123 static int fmtcmp( es_format_t *ofmt, es_format_t *nfmt )
125 return (ofmt->audio.i_bitspersample != nfmt->audio.i_bitspersample)
126 || (ofmt->audio.i_rate != nfmt->audio.i_rate)
127 || (ofmt->audio.i_channels != nfmt->audio.i_channels);
131 static int ReadBlockHeader( demux_t *p_demux )
135 int32_t i_block_size;
136 demux_sys_t *p_sys = p_demux->p_sys;
138 if( stream_Read( p_demux->s, buf, 4 ) < 4 )
139 return VLC_EGENERIC; /* EOF */
141 i_block_size = GetDWLE( buf ) >> 8;
142 msg_Dbg( p_demux, "new block: type: %u, size: %u",
143 (unsigned)*buf, i_block_size );
145 es_format_Init( &new_fmt, AUDIO_ES, 0 );
149 /*case 0: -- not possible caught earlier with stream_Read */
151 if( i_block_size < 2 )
155 if( stream_Read( p_demux->s, buf, 2 ) < 2 )
158 new_fmt.audio.i_rate = 1000000L / (256L - buf[0]);
161 msg_Err( p_demux, "Unsupported compression" );
165 new_fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
166 new_fmt.audio.i_bytes_per_frame = 1;
167 new_fmt.audio.i_frame_length = 1;
168 new_fmt.audio.i_channels = 1;
169 new_fmt.audio.i_blockalign = 1;
170 new_fmt.audio.i_bitspersample = 8;
171 new_fmt.i_bitrate = p_sys->fmt.audio.i_rate * 8;
174 /* FIXME: support block types 2, 3, 6, 7, 8 properly */
181 /* non-audio block types can be skipped */
184 if( stream_Read( p_demux->s, NULL, i_block_size ) < i_block_size )
190 if( i_block_size < 12 )
194 if( ( stream_Read( p_demux->s, buf, 8 ) < 8 )
195 || ( stream_Read( p_demux->s, NULL, 4 ) < 4 ) )
198 new_fmt.audio.i_rate = GetDWLE( buf );
199 new_fmt.audio.i_bitspersample = buf[4];
200 new_fmt.audio.i_channels = buf[5];
202 switch( GetWLE( &buf[6] ) ) /* format */
204 case 0x0000: /* PCM */
205 switch( new_fmt.audio.i_bitspersample )
208 new_fmt.i_codec = VLC_FOURCC('u','8',' ',' ');
212 new_fmt.i_codec = VLC_FOURCC('u','1','6','l');
216 msg_Err( p_demux, "Unsupported bit res.: %u bits",
217 new_fmt.audio.i_bitspersample );
222 case 0x0004: /* signed */
223 switch( new_fmt.audio.i_bitspersample )
226 new_fmt.i_codec = VLC_FOURCC('s','8',' ',' ');
230 new_fmt.i_codec = VLC_FOURCC('s','1','6','l');
234 msg_Err( p_demux, "Unsupported bit res.: %u bits",
235 new_fmt.audio.i_bitspersample );
241 msg_Err( p_demux, "Unsupported compression" );
245 new_fmt.audio.i_bytes_per_frame = new_fmt.audio.i_channels
246 * (new_fmt.audio.i_bitspersample / 8);
247 new_fmt.audio.i_frame_length = 1;
248 new_fmt.audio.i_blockalign = p_sys->fmt.audio.i_bytes_per_frame;
249 new_fmt.i_bitrate = 8 * new_fmt.audio.i_rate
250 * new_fmt.audio.i_bytes_per_frame;
254 msg_Dbg( p_demux, "Unsupported block type %u", (unsigned)*buf);
258 p_sys->i_block_size = i_block_size;
259 p_sys->i_block_offset = stream_Tell( p_demux->s );
263 /* we've read a block with data in it - update decoder */
264 msg_Dbg( p_demux, "fourcc: %4.4s, channels: %d, "
265 "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, "
266 "bits/samples: %d", (char *)&new_fmt.i_codec,
267 new_fmt.audio.i_channels, new_fmt.audio.i_rate,
268 new_fmt.i_bitrate / 8192, new_fmt.audio.i_blockalign,
269 new_fmt.audio.i_bitspersample );
271 if( ( p_sys->p_es != NULL ) && fmtcmp( &p_sys->fmt, &new_fmt ) )
273 msg_Dbg( p_demux, "codec change needed" );
274 es_out_Del( p_demux->out, p_sys->p_es );
278 if( p_sys->p_es == NULL )
280 memcpy( &p_sys->fmt, &new_fmt, sizeof( p_sys->fmt ) );
281 date_Change( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
282 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
289 /*****************************************************************************
290 * Demux: read packet and send them to decoders
291 *****************************************************************************
292 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
293 *****************************************************************************/
294 static int Demux( demux_t *p_demux )
296 demux_sys_t *p_sys = p_demux->p_sys;
300 i_offset = stream_Tell( p_demux->s );
302 while( i_offset >= p_sys->i_block_offset + p_sys->i_block_size )
303 if( ReadBlockHeader( p_demux ) != VLC_SUCCESS )
306 p_block = stream_Block( p_demux->s, p_sys->fmt.audio.i_bytes_per_frame );
307 if( p_block == NULL )
309 msg_Warn( p_demux, "cannot read data" );
313 p_block->i_dts = p_block->i_pts =
314 date_Increment( &p_sys->pts, p_sys->fmt.audio.i_frame_length );
316 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
318 es_out_Send( p_demux->out, p_sys->p_es, p_block );
323 /*****************************************************************************
324 * Close: frees unused data
325 *****************************************************************************/
326 static void Close ( vlc_object_t * p_this )
328 demux_sys_t *p_sys = ((demux_t *)p_this)->p_sys;
333 /*****************************************************************************
335 *****************************************************************************/
336 static int Control( demux_t *p_demux, int i_query, va_list args )
338 demux_sys_t *p_sys = p_demux->p_sys;
340 return demux2_vaControlHelper( p_demux->s, p_sys->i_block_offset,
341 p_sys->i_block_offset + p_sys->i_block_size,
342 p_sys->fmt.i_bitrate,
343 p_sys->fmt.audio.i_blockalign,