1 /*****************************************************************************
2 * araw.c: Pseudo audio decoder; for raw pcm data
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: araw.c,v 1.7 2002/11/14 22:38:47 massiot 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 *****************************************************************************/
29 #include <vlc/decoder.h>
30 #include <vlc/input.h>
32 #include <stdlib.h> /* malloc(), free() */
33 #include <string.h> /* strdup() */
35 /*****************************************************************************
37 *****************************************************************************/
38 typedef struct waveformatex_s
46 u16 i_size; /* the extra size in bytes */
47 u8 *p_data; /* The extra data */
50 typedef struct adec_thread_s
52 waveformatex_t format;
54 /* The bit stream structure handles the PES stream at the bit level */
55 // bit_stream_t bit_stream;
57 /* Input properties */
58 decoder_fifo_t *p_fifo;
60 /* Output properties */
61 aout_instance_t * p_aout; /* opaque */
62 aout_input_t * p_aout_input; /* opaque */
63 audio_sample_format_t output_format;
70 static int OpenDecoder ( vlc_object_t * );
72 static int RunDecoder ( decoder_fifo_t * );
73 static int InitThread ( adec_thread_t * );
74 static void DecodeThread ( adec_thread_t * );
75 static void EndThread ( adec_thread_t * );
77 /*****************************************************************************
79 *****************************************************************************/
82 set_description( _("Pseudo Raw Audio decoder") );
83 set_capability( "decoder", 50 );
84 set_callbacks( OpenDecoder, NULL );
88 static int pi_channels_maps[6] =
92 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
93 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER,
94 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT,
95 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
96 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT
99 /*****************************************************************************
100 * OpenDecoder: probe the decoder and return score
101 *****************************************************************************
102 * Tries to launch a decoder and return score so that the interface is able
104 *****************************************************************************/
105 static int OpenDecoder( vlc_object_t *p_this )
107 decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
109 switch( p_fifo->i_fourcc )
111 case VLC_FOURCC('a','r','a','w'):
112 case VLC_FOURCC('t','w','o','s'): /* for mov file */
113 p_fifo->pf_run = RunDecoder;
122 /*****************************************************************************
123 * RunDecoder: this function is called just after the thread is created
124 *****************************************************************************/
125 static int RunDecoder( decoder_fifo_t *p_fifo )
127 adec_thread_t *p_adec;
130 if( !( p_adec = malloc( sizeof( adec_thread_t ) ) ) )
132 msg_Err( p_fifo, "out of memory" );
133 DecoderError( p_fifo );
136 memset( p_adec, 0, sizeof( adec_thread_t ) );
138 p_adec->p_fifo = p_fifo;
140 if( InitThread( p_adec ) != 0 )
142 DecoderError( p_fifo );
146 while( ( !p_adec->p_fifo->b_die )&&( !p_adec->p_fifo->b_error ) )
148 DecodeThread( p_adec );
152 if( ( b_error = p_adec->p_fifo->b_error ) )
154 DecoderError( p_adec->p_fifo );
167 #define FREE( p ) if( p ) free( p ); p = NULL
168 #define GetWLE( p ) \
169 ( *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) )
171 #define GetDWLE( p ) \
172 ( *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) + \
173 ( *((u8*)(p)+2) << 16 ) + ( *((u8*)(p)+3) << 24 ) )
175 static void GetWaveFormatEx( waveformatex_t *p_wh,
179 p_wh->i_formattag = GetWLE( p_data );
180 p_wh->i_channels = GetWLE( p_data + 2 );
181 p_wh->i_samplespersec = GetDWLE( p_data + 4 );
182 p_wh->i_avgbytespersec= GetDWLE( p_data + 8 );
183 p_wh->i_blockalign = GetWLE( p_data + 12 );
184 p_wh->i_bitspersample = GetWLE( p_data + 14 );
185 if( p_wh->i_formattag != 1 )
187 p_wh->i_size = GetWLE( p_data + 16 );
191 p_wh->p_data = malloc( p_wh->i_size );
192 memcpy( p_wh->p_data, p_data + 18, p_wh->i_size );
197 /*****************************************************************************
198 * InitThread: initialize data before entering main loop
199 *****************************************************************************/
201 static int InitThread( adec_thread_t * p_adec )
204 if( p_adec->p_fifo->p_demux_data )
206 GetWaveFormatEx( &p_adec->format,
207 (u8*)p_adec->p_fifo->p_demux_data );
208 /* fixing some values */
209 if( p_adec->format.i_formattag == 1 && !p_adec->format.i_blockalign )
211 p_adec->format.i_blockalign = p_adec->format.i_channels *
212 ( ( p_adec->format.i_bitspersample + 7 ) / 8 );
217 msg_Err( p_adec->p_fifo, "unknown raw format" );
221 msg_Dbg( p_adec->p_fifo,
222 "raw format: samplerate:%dHz channels:%d bits/sample:%d blockalign:%d",
223 p_adec->format.i_samplespersec,
224 p_adec->format.i_channels,
225 p_adec->format.i_bitspersample, p_adec->format.i_blockalign );
227 /* Initialize the thread properties */
228 switch( ( p_adec->format.i_bitspersample + 7 ) / 8 )
231 p_adec->output_format.i_format = VLC_FOURCC('s','1','6','l');
234 p_adec->output_format.i_format = VLC_FOURCC('s','2','4','l');
237 p_adec->output_format.i_format = VLC_FOURCC('s','3','2','l');
240 p_adec->output_format.i_format = VLC_FOURCC('u','8',' ',' ');
243 msg_Err( p_adec->p_fifo, "bad parameters(bits/sample)" );
246 p_adec->output_format.i_rate = p_adec->format.i_samplespersec;
248 if( p_adec->format.i_channels <= 0 ||
249 p_adec->format.i_channels > 5 )
251 msg_Err( p_adec->p_fifo, "bad channels count(1-5)" );
255 p_adec->output_format.i_physical_channels =
256 p_adec->output_format.i_original_channels =
257 pi_channels_maps[p_adec->format.i_channels];
258 p_adec->p_aout = NULL;
259 p_adec->p_aout_input = NULL;
261 /* **** Create a new audio output **** */
262 aout_DateInit( &p_adec->date, p_adec->output_format.i_rate );
263 p_adec->p_aout_input = aout_DecNew( p_adec->p_fifo,
265 &p_adec->output_format );
266 if( !p_adec->p_aout_input )
268 msg_Err( p_adec->p_fifo, "cannot create aout" );
272 /* Init the BitStream */
273 // InitBitstream( &p_adec->bit_stream, p_adec->p_fifo,
279 static void GetPESData( u8 *p_buf, int i_max, pes_packet_t *p_pes )
284 data_packet_t *p_data;
287 p_data = p_pes->p_first;
288 while( p_data != NULL && i_count < i_max )
291 i_copy = __MIN( p_data->p_payload_end - p_data->p_payload_start, i_max - i_count );
296 p_data->p_payload_start,
300 p_data = p_data->p_next;
305 if( i_count < i_max )
307 memset( p_buf, 0, i_max - i_count );
311 /*****************************************************************************
312 * DecodeThread: decodes a frame
313 *****************************************************************************/
314 static void DecodeThread( adec_thread_t *p_adec )
316 aout_buffer_t *p_aout_buffer;
317 int i_samples; // per channels
322 /* **** get samples count **** */
323 input_ExtractPES( p_adec->p_fifo, &p_pes );
326 p_adec->p_fifo->b_error = 1;
329 i_size = p_pes->i_pes_size;
331 if( p_adec->format.i_blockalign > 0 )
333 i_size -= i_size % p_adec->format.i_blockalign;
335 i_size = __MAX( i_size, p_adec->format.i_blockalign );
337 if( !i_size || !p_pes )
339 msg_Err( p_adec->p_fifo, "infinite loop..." );
343 ( ( p_adec->format.i_bitspersample + 7 ) / 8 ) /
344 p_adec->format.i_channels;
346 // msg_Warn( p_adec->p_fifo, "got %d samples (%d bytes)", i_samples, i_size );
347 p_adec->pts = p_pes->i_pts;
349 /* **** Now we can output these samples **** */
351 if( p_adec->pts != 0 && p_adec->pts != aout_DateGet( &p_adec->date ) )
353 aout_DateSet( &p_adec->date, p_adec->pts );
355 else if( !aout_DateGet( &p_adec->date ) )
360 p_aout_buffer = aout_DecNewBuffer( p_adec->p_aout,
361 p_adec->p_aout_input,
365 msg_Err( p_adec->p_fifo, "cannot get aout buffer" );
366 p_adec->p_fifo->b_error = 1;
370 p_aout_buffer->start_date = aout_DateGet( &p_adec->date );
371 p_aout_buffer->end_date = aout_DateIncrement( &p_adec->date,
374 GetPESData( p_aout_buffer->p_buffer, p_aout_buffer->i_nb_bytes, p_pes );
376 aout_DecPlay( p_adec->p_aout, p_adec->p_aout_input, p_aout_buffer );
379 input_DeletePES( p_adec->p_fifo->p_packets_mgt, p_pes );
383 /*****************************************************************************
384 * EndThread : faad decoder thread destruction
385 *****************************************************************************/
386 static void EndThread (adec_thread_t *p_adec)
388 if( p_adec->p_aout_input )
390 aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );
393 FREE( p_adec->format.p_data );
395 msg_Dbg( p_adec->p_fifo, "raw audio decoder closed" );