1 /*****************************************************************************
2 * au.c : au file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 VideoLAN
5 * $Id: au.c,v 1.3 2003/08/01 00:05:57 fenrir Exp $
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>
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Open ( vlc_object_t * );
39 static void Close ( vlc_object_t * );
42 set_description( _("AU demuxer") );
43 set_capability( "demux", 142 );
44 set_callbacks( Open, Close );
49 * - all adpcm things (I _NEED_ samples)
52 /*****************************************************************************
54 *****************************************************************************/
55 static int DemuxPCM ( input_thread_t * );
56 /* TODO static int DemuxADPCM ( input_thread_t * ); */
58 #define GetDWBE( p ) __GetDWBE( (uint8_t*)(p) )
59 static inline uint32_t __GetDWBE( uint8_t *p )
61 return( ( p[0] << 24 ) + ( p[1] << 16 ) + ( p[2] << 8 ) + p[3] );
67 AU_MULAW_8 = 1, /* 8-bit ISDN u-law */
68 AU_LINEAR_8 = 2, /* 8-bit linear PCM */
69 AU_LINEAR_16 = 3, /* 16-bit linear PCM */
70 AU_LINEAR_24 = 4, /* 24-bit linear PCM */
71 AU_LINEAR_32 = 5, /* 32-bit linear PCM */
72 AU_FLOAT = 6, /* 32-bit IEEE floating point */
73 AU_DOUBLE = 7, /* 64-bit IEEE floating point */
74 AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */
75 AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */
76 AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */
77 AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */
78 AU_ALAW_8 = 27 /* 8-bit ISDN A-law */
89 #ifdef HAVE_ATTRIBUTE_PACKED
90 __attribute__((__packed__))
93 uint32_t i_header_size;
96 uint32_t i_sample_rate;
109 es_descriptor_t *p_es;
112 mtime_t i_frame_length;
116 /*****************************************************************************
117 * Open: check file and initializes structures
118 *****************************************************************************/
119 static int Open( vlc_object_t * p_this )
121 input_thread_t *p_input = (input_thread_t *)p_this;
126 vlc_fourcc_t i_fourcc;
130 /* a little test to see if it's a au file */
131 if( input_Peek( p_input, &p_peek, 4 ) < 4 )
133 msg_Warn( p_input, "AU module discarded (cannot peek)" );
136 if( strncmp( p_peek, ".snd", 4 ) )
138 msg_Warn( p_input, "AU module discarded (not a valid file)" );
142 p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
146 if( ( p_sys->s = stream_OpenInput( p_input ) ) == NULL )
148 msg_Err( p_input, "cannot create stream" );
153 stream_Read( p_sys->s, NULL, 4 ); /* cannot fail */
156 if( stream_Read( p_sys->s, &p_sys->au, sizeof( au_t ) ) < (int)sizeof( au_t ) )
158 msg_Err( p_input, "cannot load header" );
161 p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
162 p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
163 p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
164 p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
165 p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
168 "au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
169 p_sys->au.i_header_size,
170 p_sys->au.i_data_size,
171 p_sys->au.i_encoding,
172 p_sys->au.i_sample_rate,
173 p_sys->au.i_channels );
175 if( p_sys->au.i_header_size < 24 )
177 msg_Warn( p_input, "AU module discarded (not a valid file)" );
181 /* skip extra header data */
182 if( p_sys->au.i_header_size > 4 + sizeof( au_t ) )
184 stream_Read( p_sys->s, NULL, p_sys->au.i_header_size - 4 - sizeof( au_t ) );
187 /* Create WAVEFORMATEX structure */
188 p_sys->wf.nChannels = p_sys->au.i_channels;
189 p_sys->wf.nSamplesPerSec= p_sys->au.i_sample_rate;
190 p_sys->wf.cbSize = 0;
192 switch( p_sys->au.i_encoding )
194 case AU_ALAW_8: /* 8-bit ISDN A-law */
195 p_sys->wf.wFormatTag = WAVE_FORMAT_ALAW; // FIXME ??
196 p_sys->wf.wBitsPerSample = 8;
197 p_sys->wf.nBlockAlign = 1 * p_sys->wf.nChannels;
198 i_fourcc = VLC_FOURCC( 'a','l','a','w' );
202 case AU_MULAW_8: /* 8-bit ISDN u-law */
203 p_sys->wf.wFormatTag = WAVE_FORMAT_MULAW; // FIXME ??
204 p_sys->wf.wBitsPerSample = 8;
205 p_sys->wf.nBlockAlign = 1 * p_sys->wf.nChannels;
206 i_fourcc = VLC_FOURCC( 'u','l','a','w' );
210 case AU_LINEAR_8: /* 8-bit linear PCM */
211 p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
212 p_sys->wf.wBitsPerSample = 8;
213 p_sys->wf.nBlockAlign = 1 * p_sys->wf.nChannels;
214 i_fourcc = VLC_FOURCC( 't','w','o','s' );
218 case AU_LINEAR_16: /* 16-bit linear PCM */
219 p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
220 p_sys->wf.wBitsPerSample = 16;
221 p_sys->wf.nBlockAlign = 2 * p_sys->wf.nChannels;
222 i_fourcc = VLC_FOURCC( 't','w','o','s' );
226 case AU_LINEAR_24: /* 24-bit linear PCM */
227 p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
228 p_sys->wf.wBitsPerSample = 24;
229 p_sys->wf.nBlockAlign = 3 * p_sys->wf.nChannels;
230 i_fourcc = VLC_FOURCC( 't','w','o','s' );
234 case AU_LINEAR_32: /* 32-bit linear PCM */
235 p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
236 p_sys->wf.wBitsPerSample = 32;
237 p_sys->wf.nBlockAlign = 4 * p_sys->wf.nChannels;
238 i_fourcc = VLC_FOURCC( 't','w','o','s' );
242 case AU_FLOAT: /* 32-bit IEEE floating point */
243 p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
244 p_sys->wf.wBitsPerSample = 32;
245 p_sys->wf.nBlockAlign = 4 * p_sys->wf.nChannels;
246 i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
250 case AU_DOUBLE: /* 64-bit IEEE floating point */
251 p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
252 p_sys->wf.wBitsPerSample = 64;
253 p_sys->wf.nBlockAlign = 8 * p_sys->wf.nChannels;
254 i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
258 case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
259 p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
260 p_sys->wf.wBitsPerSample = 0;
261 p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
262 i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
263 i_cat = AU_CAT_ADPCM;
266 case AU_ADPCM_G722: /* CCITT g.722 ADPCM */
267 p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
268 p_sys->wf.wBitsPerSample = 0;
269 p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
270 i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
271 i_cat = AU_CAT_ADPCM;
274 case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
275 p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
276 p_sys->wf.wBitsPerSample = 0;
277 p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
278 i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
279 i_cat = AU_CAT_ADPCM;
282 case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
283 p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
284 p_sys->wf.wBitsPerSample = 0;
285 p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
286 i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
287 i_cat = AU_CAT_ADPCM;
291 msg_Warn( p_input, "unknow encoding=0x%x", p_sys->au.i_encoding );
292 i_cat = AU_CAT_UNKNOWN;
295 p_sys->wf.nAvgBytesPerSec = p_sys->wf.nSamplesPerSec * p_sys->wf.nChannels * p_sys->wf.wBitsPerSample / 8;
299 if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
301 p_sys->i_frame_size = 0;
302 p_sys->i_frame_length = 0;
304 msg_Err( p_input, "unsupported codec/type (Please report it)" );
309 int i_samples, i_modulo;
311 /* read samples for 50ms of */
312 i_samples = __MAX( p_sys->wf.nSamplesPerSec / 20, 1 );
314 p_sys->i_frame_size = i_samples * p_sys->wf.nChannels * ( (p_sys->wf.wBitsPerSample + 7) / 8 );
316 if( p_sys->wf.nBlockAlign > 0 )
318 if( ( i_modulo = p_sys->i_frame_size % p_sys->wf.nBlockAlign ) != 0 )
320 p_sys->i_frame_size += p_sys->wf.nBlockAlign - i_modulo;
324 p_sys->i_frame_length = (mtime_t)1000000 *
326 (mtime_t)p_sys->wf.nSamplesPerSec;
328 p_input->pf_demux = DemuxPCM;
331 /* create one program */
332 vlc_mutex_lock( &p_input->stream.stream_lock );
333 if( input_InitStream( p_input, 0 ) == -1)
335 vlc_mutex_unlock( &p_input->stream.stream_lock );
336 msg_Err( p_input, "cannot init stream" );
339 if( input_AddProgram( p_input, 0, 0) == NULL )
341 vlc_mutex_unlock( &p_input->stream.stream_lock );
342 msg_Err( p_input, "cannot add program" );
346 p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
347 p_input->stream.i_mux_rate = p_sys->wf.nAvgBytesPerSec / 50;
349 p_sys->p_es = input_AddES( p_input, p_input->stream.p_selected_program,
350 0x01, AUDIO_ES, NULL, 0 );
352 p_sys->p_es->i_stream_id = 0x01;
353 p_sys->p_es->i_fourcc = i_fourcc;
354 p_sys->p_es->p_waveformatex= malloc( sizeof( WAVEFORMATEX ) );
355 memcpy( p_sys->p_es->p_waveformatex, &p_sys->wf, sizeof( WAVEFORMATEX ) );
357 input_SelectES( p_input, p_sys->p_es );
359 p_input->stream.p_selected_program->b_is_ok = 1;
360 vlc_mutex_unlock( &p_input->stream.stream_lock );
367 stream_Release( p_sys->s );
373 /*****************************************************************************
374 * DemuxPCM: read packet and send them to decoders
375 *****************************************************************************
376 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
377 *****************************************************************************/
378 static int DemuxPCM( input_thread_t *p_input )
380 demux_sys_t *p_sys = p_input->p_demux_data;
383 if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
387 stream_Control( p_sys->s, STREAM_GET_POSITION, &i_pos );
388 if( p_sys->wf.nBlockAlign != 0 )
390 i_pos += p_sys->wf.nBlockAlign - i_pos % p_sys->wf.nBlockAlign;
391 if( stream_Control( p_sys->s, STREAM_SET_POSITION, i_pos ) )
393 msg_Err( p_input, "STREAM_SET_POSITION failed (cannot resync)" );
398 input_ClockManageRef( p_input,
399 p_input->stream.p_selected_program,
400 p_sys->i_time * 9 / 100 );
402 if( ( p_pes = stream_PesPacket( p_sys->s, p_sys->i_frame_size ) ) == NULL )
404 msg_Warn( p_input, "cannot read data" );
408 p_pes->i_pts = input_ClockGetTS( p_input,
409 p_input->stream.p_selected_program,
410 p_sys->i_time * 9 / 100 );
412 if( !p_sys->p_es->p_decoder_fifo )
414 msg_Err( p_input, "no audio decoder" );
415 input_DeletePES( p_input->p_method_data, p_pes );
419 input_DecodePES( p_sys->p_es->p_decoder_fifo, p_pes );
420 p_sys->i_time += p_sys->i_frame_length;
424 /*****************************************************************************
425 * Close: frees unused data
426 *****************************************************************************/
427 static void Close( vlc_object_t * p_this )
429 input_thread_t *p_input = (input_thread_t *)p_this;
430 demux_sys_t *p_sys = p_input->p_demux_data;
432 stream_Release( p_sys->s );