1 /*****************************************************************************
2 * au.c : au file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, 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_description( _("AU demuxer") );
45 set_capability( "demux2", 10 );
46 set_callbacks( Open, Close );
50 /*****************************************************************************
52 *****************************************************************************/
56 AU_MULAW_8 = 1, /* 8-bit ISDN u-law */
57 AU_LINEAR_8 = 2, /* 8-bit linear PCM */
58 AU_LINEAR_16 = 3, /* 16-bit linear PCM */
59 AU_LINEAR_24 = 4, /* 24-bit linear PCM */
60 AU_LINEAR_32 = 5, /* 32-bit linear PCM */
61 AU_FLOAT = 6, /* 32-bit IEEE floating point */
62 AU_DOUBLE = 7, /* 64-bit IEEE floating point */
63 AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */
64 AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */
65 AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */
66 AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */
67 AU_ALAW_8 = 27 /* 8-bit ISDN A-law */
85 mtime_t i_frame_length;
90 static int DemuxPCM( demux_t * );
91 static int Control ( demux_t *, int i_query, va_list args );
93 /*****************************************************************************
94 * Open: check file and initializes structures
95 *****************************************************************************/
96 static int Open( vlc_object_t *p_this )
98 demux_t *p_demux = (demux_t*)p_this;
104 int i_samples, i_modulo;
106 if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
108 msg_Warn( p_demux, "cannot peek" );
111 if( strncmp( p_peek, ".snd", 4 ) )
113 msg_Warn( p_demux, "AU module discarded" );
118 stream_Read( p_demux->s, NULL, 4 ); /* cannot fail */
121 if( stream_Read( p_demux->s, hdr, 20 ) < 20 )
123 msg_Err( p_demux, "cannot read" );
127 if( GetDWBE( &hdr[0] ) < 24 )
129 msg_Err( p_demux, "invalid file" );
133 p_sys = p_demux->p_sys = malloc( sizeof( demux_sys_t ) );
135 p_sys->i_header_size = GetDWBE( &hdr[0] );
137 /* skip extra header data */
138 if( p_sys->i_header_size > 24 )
140 stream_Read( p_demux->s, NULL, p_sys->i_header_size - 24 );
144 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
145 p_sys->fmt.audio.i_rate = GetDWBE( &hdr[12] );
146 p_sys->fmt.audio.i_channels = GetDWBE( &hdr[16] );
149 p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
150 p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
151 p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
152 p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
153 p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
155 switch( GetDWBE( &hdr[8] ) )
157 case AU_ALAW_8: /* 8-bit ISDN A-law */
158 p_sys->fmt.i_codec = VLC_FOURCC( 'a','l','a','w' );
159 p_sys->fmt.audio.i_bitspersample = 8;
160 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
164 case AU_MULAW_8: /* 8-bit ISDN u-law */
165 p_sys->fmt.i_codec = VLC_FOURCC( 'u','l','a','w' );
166 p_sys->fmt.audio.i_bitspersample = 8;
167 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
171 case AU_LINEAR_8: /* 8-bit linear PCM */
172 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
173 p_sys->fmt.audio.i_bitspersample = 8;
174 p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels;
178 case AU_LINEAR_16: /* 16-bit linear PCM */
179 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
180 p_sys->fmt.audio.i_bitspersample = 16;
181 p_sys->fmt.audio.i_blockalign = 2 * p_sys->fmt.audio.i_channels;
185 case AU_LINEAR_24: /* 24-bit linear PCM */
186 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
187 p_sys->fmt.audio.i_bitspersample = 24;
188 p_sys->fmt.audio.i_blockalign = 3 * p_sys->fmt.audio.i_channels;
192 case AU_LINEAR_32: /* 32-bit linear PCM */
193 p_sys->fmt.i_codec = VLC_FOURCC( 't','w','o','s' );
194 p_sys->fmt.audio.i_bitspersample = 32;
195 p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
199 case AU_FLOAT: /* 32-bit IEEE floating point */
200 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
201 p_sys->fmt.audio.i_bitspersample = 32;
202 p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels;
206 case AU_DOUBLE: /* 64-bit IEEE floating point */
207 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
208 p_sys->fmt.audio.i_bitspersample = 64;
209 p_sys->fmt.audio.i_blockalign = 8 * p_sys->fmt.audio.i_channels;
213 case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
214 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
215 p_sys->fmt.audio.i_bitspersample = 0;
216 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
217 i_cat = AU_CAT_ADPCM;
220 case AU_ADPCM_G722: /* CCITT g.722 ADPCM */
221 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
222 p_sys->fmt.audio.i_bitspersample = 0;
223 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
224 i_cat = AU_CAT_ADPCM;
227 case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
228 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
229 p_sys->fmt.audio.i_bitspersample = 0;
230 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
231 i_cat = AU_CAT_ADPCM;
234 case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
235 p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
236 p_sys->fmt.audio.i_bitspersample = 0;
237 p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels;
238 i_cat = AU_CAT_ADPCM;
242 msg_Warn( p_demux, "unknow encoding=0x%x", GetDWBE( &hdr[8] ) );
243 p_sys->fmt.audio.i_bitspersample = 0;
244 p_sys->fmt.audio.i_blockalign = 0;
245 i_cat = AU_CAT_UNKNOWN;
249 p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate *
250 p_sys->fmt.audio.i_channels *
251 p_sys->fmt.audio.i_bitspersample;
253 if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
255 p_sys->i_frame_size = 0;
256 p_sys->i_frame_length = 0;
258 msg_Err( p_demux, "unsupported codec/type (Please report it)" );
264 p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
266 /* calculate 50ms frame size/time */
267 i_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
268 p_sys->i_frame_size = i_samples * p_sys->fmt.audio.i_channels *
269 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
270 if( p_sys->fmt.audio.i_blockalign > 0 )
272 if( ( i_modulo = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign ) != 0 )
274 p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - i_modulo;
277 p_sys->i_frame_length = (mtime_t)1000000 *
279 (mtime_t)p_sys->fmt.audio.i_rate;
281 /* finish to set up p_demux */
282 p_demux->pf_demux = DemuxPCM;
283 p_demux->pf_control = Control;
288 /*****************************************************************************
289 * DemuxPCM: read packet and send them to decoders
290 *****************************************************************************
291 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
292 *****************************************************************************/
293 static int DemuxPCM( demux_t *p_demux )
295 demux_sys_t *p_sys = p_demux->p_sys;
299 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time );
301 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
303 msg_Warn( p_demux, "cannot read data" );
308 p_block->i_pts = p_sys->i_time;
310 es_out_Send( p_demux->out, p_sys->es, p_block );
312 p_sys->i_time += p_sys->i_frame_length;
317 /*****************************************************************************
318 * Close: frees unused data
319 *****************************************************************************/
320 static void Close( vlc_object_t * p_this )
322 demux_t *p_demux = (demux_t*)p_this;
323 demux_sys_t *p_sys = p_demux->p_sys;
328 /*****************************************************************************
330 *****************************************************************************/
331 static int Control( demux_t *p_demux, int i_query, va_list args )
333 demux_sys_t *p_sys = p_demux->p_sys;
335 return demux2_vaControlHelper( p_demux->s, p_sys->i_header_size, -1,
336 p_sys->fmt.i_bitrate, p_sys->fmt.audio.i_blockalign,