1 /*****************************************************************************
2 * au.c : au file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2007 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
37 * - all adpcm things (I _NEED_ samples)
41 /*****************************************************************************
43 *****************************************************************************/
44 static int Open ( vlc_object_t * );
45 static void Close( vlc_object_t * );
48 set_category( CAT_INPUT );
49 set_subcategory( SUBCAT_INPUT_DEMUX );
50 set_description( N_("AU demuxer") );
51 set_capability( "demux", 10 );
52 set_callbacks( Open, Close );
56 /*****************************************************************************
58 *****************************************************************************/
62 AU_MULAW_8 = 1, /* 8-bit ISDN u-law */
63 AU_LINEAR_8 = 2, /* 8-bit linear PCM */
64 AU_LINEAR_16 = 3, /* 16-bit linear PCM */
65 AU_LINEAR_24 = 4, /* 24-bit linear PCM */
66 AU_LINEAR_32 = 5, /* 32-bit linear PCM */
67 AU_FLOAT = 6, /* 32-bit IEEE floating point */
68 AU_DOUBLE = 7, /* 64-bit IEEE floating point */
69 AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */
70 AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */
71 AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */
72 AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */
73 AU_ALAW_8 = 27 /* 8-bit ISDN A-law */
91 mtime_t i_frame_length;
96 static int Demux( demux_t * );
97 static int Control ( demux_t *, int i_query, va_list args );
99 /*****************************************************************************
100 * Open: check file and initializes structures
101 *****************************************************************************/
102 static int Open( vlc_object_t *p_this )
104 demux_t *p_demux = (demux_t*)p_this;
108 const uint8_t *p_peek;
110 int i_samples, i_modulo;
112 CHECK_PEEK( p_peek, 4 );
114 if( memcmp( p_peek, ".snd", 4 ) )
120 stream_Read( p_demux->s, NULL, 4 ); /* cannot fail */
123 if( stream_Read( p_demux->s, hdr, 20 ) < 20 )
125 msg_Err( p_demux, "cannot read" );
129 if( GetDWBE( &hdr[0] ) < 24 )
131 msg_Err( p_demux, "invalid file" );
135 DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys;
137 p_sys->i_header_size = GetDWBE( &hdr[0] );
139 /* skip extra header data */
140 if( p_sys->i_header_size > 24 )
142 stream_Read( p_demux->s, NULL, p_sys->i_header_size - 24 );
146 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
147 p_sys->fmt.audio.i_rate = GetDWBE( &hdr[12] );
148 p_sys->fmt.audio.i_channels = GetDWBE( &hdr[16] );
151 p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
152 p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
153 p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
154 p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
155 p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
157 switch( GetDWBE( &hdr[8] ) )
159 case AU_ALAW_8: /* 8-bit ISDN A-law */
160 p_sys->fmt.i_codec = VLC_FOURCC( 'a','l','a','w' );
161 p_sys->fmt.audio.i_bitspersample = 8;
162 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
166 case AU_MULAW_8: /* 8-bit ISDN u-law */
167 p_sys->fmt.i_codec = VLC_FOURCC( 'u','l','a','w' );
168 p_sys->fmt.audio.i_bitspersample = 8;
169 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
173 case AU_LINEAR_8: /* 8-bit linear PCM */
174 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
175 p_sys->fmt.audio.i_bitspersample = 8;
176 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
180 case AU_LINEAR_16: /* 16-bit linear PCM */
181 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
182 p_sys->fmt.audio.i_bitspersample = 16;
183 p_sys->fmt.audio.i_blockalign = 2 * p_sys->fmt.audio.i_channels;
187 case AU_LINEAR_24: /* 24-bit linear PCM */
188 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
189 p_sys->fmt.audio.i_bitspersample = 24;
190 p_sys->fmt.audio.i_blockalign = 3 * p_sys->fmt.audio.i_channels;
194 case AU_LINEAR_32: /* 32-bit linear PCM */
195 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
196 p_sys->fmt.audio.i_bitspersample = 32;
197 p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
201 case AU_FLOAT: /* 32-bit IEEE floating point */
202 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
203 p_sys->fmt.audio.i_bitspersample = 32;
204 p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
208 case AU_DOUBLE: /* 64-bit IEEE floating point */
209 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
210 p_sys->fmt.audio.i_bitspersample = 64;
211 p_sys->fmt.audio.i_blockalign = 8 * p_sys->fmt.audio.i_channels;
215 case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
216 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
217 p_sys->fmt.audio.i_bitspersample = 0;
218 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
219 i_cat = AU_CAT_ADPCM;
222 case AU_ADPCM_G722: /* CCITT g.722 ADPCM */
223 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
224 p_sys->fmt.audio.i_bitspersample = 0;
225 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
226 i_cat = AU_CAT_ADPCM;
229 case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
230 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
231 p_sys->fmt.audio.i_bitspersample = 0;
232 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
233 i_cat = AU_CAT_ADPCM;
236 case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
237 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
238 p_sys->fmt.audio.i_bitspersample = 0;
239 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
240 i_cat = AU_CAT_ADPCM;
244 msg_Warn( p_demux, "unknow encoding=0x%x", GetDWBE( &hdr[8] ) );
245 p_sys->fmt.audio.i_bitspersample = 0;
246 p_sys->fmt.audio.i_blockalign = 0;
247 i_cat = AU_CAT_UNKNOWN;
251 p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate *
252 p_sys->fmt.audio.i_channels *
253 p_sys->fmt.audio.i_bitspersample;
255 if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
257 p_sys->i_frame_size = 0;
258 p_sys->i_frame_length = 0;
260 msg_Err( p_demux, "unsupported codec/type (Please report it)" );
266 p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
268 /* calculate 50ms frame size/time */
269 i_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
270 p_sys->i_frame_size = i_samples * p_sys->fmt.audio.i_channels *
271 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
272 if( p_sys->fmt.audio.i_blockalign > 0 )
274 if( ( i_modulo = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign ) != 0 )
276 p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - i_modulo;
279 p_sys->i_frame_length = (mtime_t)1000000 *
281 (mtime_t)p_sys->fmt.audio.i_rate;
286 /*****************************************************************************
287 * Demux: read packet and send them to decoders
288 *****************************************************************************
289 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
290 *****************************************************************************/
291 static int Demux( demux_t *p_demux )
293 demux_sys_t *p_sys = p_demux->p_sys;
297 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time );
299 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
301 msg_Warn( p_demux, "cannot read data" );
306 p_block->i_pts = p_sys->i_time;
308 es_out_Send( p_demux->out, p_sys->es, p_block );
310 p_sys->i_time += p_sys->i_frame_length;
315 /*****************************************************************************
316 * Close: frees unused data
317 *****************************************************************************/
318 static void Close( vlc_object_t * p_this )
320 demux_t *p_demux = (demux_t*)p_this;
321 demux_sys_t *p_sys = p_demux->p_sys;
326 /*****************************************************************************
328 *****************************************************************************/
329 static int Control( demux_t *p_demux, int i_query, va_list args )
331 demux_sys_t *p_sys = p_demux->p_sys;
333 return demux_vaControlHelper( p_demux->s, p_sys->i_header_size, -1,
334 p_sys->fmt.i_bitrate, p_sys->fmt.audio.i_blockalign,