1 /*****************************************************************************
2 * au.c : au file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 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 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc/input.h>
33 * - all adpcm things (I _NEED_ samples)
37 /*****************************************************************************
39 *****************************************************************************/
40 static int Open ( vlc_object_t * );
41 static void Close( vlc_object_t * );
44 set_category( CAT_INPUT );
45 set_subcategory( SUBCAT_INPUT_DEMUX );
46 set_description( _("AU demuxer") );
47 set_capability( "demux2", 10 );
48 set_callbacks( Open, Close );
52 /*****************************************************************************
54 *****************************************************************************/
58 AU_MULAW_8 = 1, /* 8-bit ISDN u-law */
59 AU_LINEAR_8 = 2, /* 8-bit linear PCM */
60 AU_LINEAR_16 = 3, /* 16-bit linear PCM */
61 AU_LINEAR_24 = 4, /* 24-bit linear PCM */
62 AU_LINEAR_32 = 5, /* 32-bit linear PCM */
63 AU_FLOAT = 6, /* 32-bit IEEE floating point */
64 AU_DOUBLE = 7, /* 64-bit IEEE floating point */
65 AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */
66 AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */
67 AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */
68 AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */
69 AU_ALAW_8 = 27 /* 8-bit ISDN A-law */
87 mtime_t i_frame_length;
92 static int DemuxPCM( demux_t * );
93 static int Control ( demux_t *, int i_query, va_list args );
95 /*****************************************************************************
96 * Open: check file and initializes structures
97 *****************************************************************************/
98 static int Open( vlc_object_t *p_this )
100 demux_t *p_demux = (demux_t*)p_this;
106 int i_samples, i_modulo;
108 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC;
110 if( memcmp( p_peek, ".snd", 4 ) )
116 stream_Read( p_demux->s, NULL, 4 ); /* cannot fail */
119 if( stream_Read( p_demux->s, hdr, 20 ) < 20 )
121 msg_Err( p_demux, "cannot read" );
125 if( GetDWBE( &hdr[0] ) < 24 )
127 msg_Err( p_demux, "invalid file" );
131 p_sys = p_demux->p_sys = malloc( sizeof( demux_sys_t ) );
133 p_sys->i_header_size = GetDWBE( &hdr[0] );
135 /* skip extra header data */
136 if( p_sys->i_header_size > 24 )
138 stream_Read( p_demux->s, NULL, p_sys->i_header_size - 24 );
142 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
143 p_sys->fmt.audio.i_rate = GetDWBE( &hdr[12] );
144 p_sys->fmt.audio.i_channels = GetDWBE( &hdr[16] );
147 p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
148 p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
149 p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
150 p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
151 p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
153 switch( GetDWBE( &hdr[8] ) )
155 case AU_ALAW_8: /* 8-bit ISDN A-law */
156 p_sys->fmt.i_codec = VLC_FOURCC( 'a','l','a','w' );
157 p_sys->fmt.audio.i_bitspersample = 8;
158 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
162 case AU_MULAW_8: /* 8-bit ISDN u-law */
163 p_sys->fmt.i_codec = VLC_FOURCC( 'u','l','a','w' );
164 p_sys->fmt.audio.i_bitspersample = 8;
165 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
169 case AU_LINEAR_8: /* 8-bit linear PCM */
170 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
171 p_sys->fmt.audio.i_bitspersample = 8;
172 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
176 case AU_LINEAR_16: /* 16-bit linear PCM */
177 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
178 p_sys->fmt.audio.i_bitspersample = 16;
179 p_sys->fmt.audio.i_blockalign = 2 * p_sys->fmt.audio.i_channels;
183 case AU_LINEAR_24: /* 24-bit linear PCM */
184 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
185 p_sys->fmt.audio.i_bitspersample = 24;
186 p_sys->fmt.audio.i_blockalign = 3 * p_sys->fmt.audio.i_channels;
190 case AU_LINEAR_32: /* 32-bit linear PCM */
191 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
192 p_sys->fmt.audio.i_bitspersample = 32;
193 p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
197 case AU_FLOAT: /* 32-bit IEEE floating point */
198 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
199 p_sys->fmt.audio.i_bitspersample = 32;
200 p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
204 case AU_DOUBLE: /* 64-bit IEEE floating point */
205 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
206 p_sys->fmt.audio.i_bitspersample = 64;
207 p_sys->fmt.audio.i_blockalign = 8 * p_sys->fmt.audio.i_channels;
211 case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
212 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
213 p_sys->fmt.audio.i_bitspersample = 0;
214 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
215 i_cat = AU_CAT_ADPCM;
218 case AU_ADPCM_G722: /* CCITT g.722 ADPCM */
219 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
220 p_sys->fmt.audio.i_bitspersample = 0;
221 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
222 i_cat = AU_CAT_ADPCM;
225 case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
226 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
227 p_sys->fmt.audio.i_bitspersample = 0;
228 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
229 i_cat = AU_CAT_ADPCM;
232 case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
233 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
234 p_sys->fmt.audio.i_bitspersample = 0;
235 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
236 i_cat = AU_CAT_ADPCM;
240 msg_Warn( p_demux, "unknow encoding=0x%x", GetDWBE( &hdr[8] ) );
241 p_sys->fmt.audio.i_bitspersample = 0;
242 p_sys->fmt.audio.i_blockalign = 0;
243 i_cat = AU_CAT_UNKNOWN;
247 p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate *
248 p_sys->fmt.audio.i_channels *
249 p_sys->fmt.audio.i_bitspersample;
251 if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
253 p_sys->i_frame_size = 0;
254 p_sys->i_frame_length = 0;
256 msg_Err( p_demux, "unsupported codec/type (Please report it)" );
262 p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
264 /* calculate 50ms frame size/time */
265 i_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
266 p_sys->i_frame_size = i_samples * p_sys->fmt.audio.i_channels *
267 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
268 if( p_sys->fmt.audio.i_blockalign > 0 )
270 if( ( i_modulo = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign ) != 0 )
272 p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - i_modulo;
275 p_sys->i_frame_length = (mtime_t)1000000 *
277 (mtime_t)p_sys->fmt.audio.i_rate;
279 /* finish to set up p_demux */
280 p_demux->pf_demux = DemuxPCM;
281 p_demux->pf_control = Control;
286 /*****************************************************************************
287 * DemuxPCM: 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 DemuxPCM( 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 demux2_vaControlHelper( p_demux->s, p_sys->i_header_size, -1,
334 p_sys->fmt.i_bitrate, p_sys->fmt.audio.i_blockalign,