1 /*****************************************************************************
2 * araw.c: Pseudo audio decoder; for raw pcm data
3 *****************************************************************************
4 * Copyright (C) 2001, 2002 VideoLAN
5 * $Id: araw.c,v 1.8 2002/11/28 16:32:29 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 *****************************************************************************/
29 #include <vlc/decoder.h>
30 #include <vlc/input.h>
32 #include <stdlib.h> /* malloc(), free() */
33 #include <string.h> /* strdup() */
35 /*****************************************************************************
37 *****************************************************************************/
39 typedef struct adec_thread_s
43 //waveformatex_t format;
45 /* The bit stream structure handles the PES stream at the bit level */
46 // bit_stream_t bit_stream;
48 /* Input properties */
49 decoder_fifo_t *p_fifo;
51 /* Output properties */
52 aout_instance_t * p_aout; /* opaque */
53 aout_input_t * p_aout_input; /* opaque */
54 audio_sample_format_t output_format;
61 static int OpenDecoder ( vlc_object_t * );
63 static int RunDecoder ( decoder_fifo_t * );
64 static int InitThread ( adec_thread_t * );
65 static void DecodeThread ( adec_thread_t * );
66 static void EndThread ( adec_thread_t * );
68 /*****************************************************************************
70 *****************************************************************************/
73 set_description( _("Pseudo Raw Audio decoder") );
74 set_capability( "decoder", 50 );
75 set_callbacks( OpenDecoder, NULL );
79 static int pi_channels_maps[6] =
83 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
84 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER,
85 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT,
86 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
87 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT
90 /*****************************************************************************
91 * OpenDecoder: probe the decoder and return score
92 *****************************************************************************
93 * Tries to launch a decoder and return score so that the interface is able
95 *****************************************************************************/
96 static int OpenDecoder( vlc_object_t *p_this )
98 decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
100 switch( p_fifo->i_fourcc )
102 case VLC_FOURCC('a','r','a','w'):
103 case VLC_FOURCC('t','w','o','s'): /* for mov file */
104 p_fifo->pf_run = RunDecoder;
113 /*****************************************************************************
114 * RunDecoder: this function is called just after the thread is created
115 *****************************************************************************/
116 static int RunDecoder( decoder_fifo_t *p_fifo )
118 adec_thread_t *p_adec;
121 if( !( p_adec = malloc( sizeof( adec_thread_t ) ) ) )
123 msg_Err( p_fifo, "out of memory" );
124 DecoderError( p_fifo );
127 memset( p_adec, 0, sizeof( adec_thread_t ) );
129 p_adec->p_fifo = p_fifo;
131 if( InitThread( p_adec ) != 0 )
133 DecoderError( p_fifo );
137 while( ( !p_adec->p_fifo->b_die )&&( !p_adec->p_fifo->b_error ) )
139 DecodeThread( p_adec );
143 if( ( b_error = p_adec->p_fifo->b_error ) )
145 DecoderError( p_adec->p_fifo );
158 #define FREE( p ) if( p ) free( p ); p = NULL
159 #define GetWLE( p ) \
160 ( *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) )
162 #define GetDWLE( p ) \
163 ( *(u8*)(p) + ( *((u8*)(p)+1) << 8 ) + \
164 ( *((u8*)(p)+2) << 16 ) + ( *((u8*)(p)+3) << 24 ) )
167 static void GetWaveFormatEx( waveformatex_t *p_wh,
171 p_wh->i_formattag = GetWLE( p_data );
172 p_wh->i_channels = GetWLE( p_data + 2 );
173 p_wh->i_samplespersec = GetDWLE( p_data + 4 );
174 p_wh->i_avgbytespersec= GetDWLE( p_data + 8 );
175 p_wh->i_blockalign = GetWLE( p_data + 12 );
176 p_wh->i_bitspersample = GetWLE( p_data + 14 );
177 if( p_wh->i_formattag != 1 )
179 p_wh->i_size = GetWLE( p_data + 16 );
183 p_wh->p_data = malloc( p_wh->i_size );
184 memcpy( p_wh->p_data, p_data + 18, p_wh->i_size );
190 /*****************************************************************************
191 * InitThread: initialize data before entering main loop
192 *****************************************************************************/
194 static int InitThread( adec_thread_t * p_adec )
197 if( !p_adec->p_fifo->p_demux_data )
199 msg_Err( p_adec->p_fifo, "unknown raw format" );
202 p_adec->p_wf = (WAVEFORMATEX*)p_adec->p_fifo->p_demux_data;
203 /* fixing some values */
204 if( p_adec->p_wf->wFormatTag == WAVE_FORMAT_PCM &&
205 !p_adec->p_wf->nBlockAlign )
207 p_adec->p_wf->nBlockAlign =
208 p_adec->p_wf->nChannels *
209 ( ( p_adec->p_wf->wBitsPerSample + 7 ) / 8 );
212 msg_Dbg( p_adec->p_fifo,
213 "raw format: samplerate:%dHz channels:%d bits/sample:%d blockalign:%d",
214 p_adec->p_wf->nSamplesPerSec,
215 p_adec->p_wf->nChannels,
216 p_adec->p_wf->wBitsPerSample,
217 p_adec->p_wf->nBlockAlign );
219 /* Initialize the thread properties */
220 switch( ( p_adec->p_wf->wBitsPerSample + 7 ) / 8 )
223 p_adec->output_format.i_format = VLC_FOURCC('s','1','6','l');
226 p_adec->output_format.i_format = VLC_FOURCC('s','2','4','l');
229 p_adec->output_format.i_format = VLC_FOURCC('s','3','2','l');
232 p_adec->output_format.i_format = VLC_FOURCC('u','8',' ',' ');
235 msg_Err( p_adec->p_fifo, "bad parameters(bits/sample)" );
238 p_adec->output_format.i_rate = p_adec->p_wf->nSamplesPerSec;
240 if( p_adec->p_wf->nChannels <= 0 ||
241 p_adec->p_wf->nChannels > 5 )
243 msg_Err( p_adec->p_fifo, "bad channels count(1-5)" );
247 p_adec->output_format.i_physical_channels =
248 p_adec->output_format.i_original_channels =
249 pi_channels_maps[p_adec->p_wf->nChannels];
250 p_adec->p_aout = NULL;
251 p_adec->p_aout_input = NULL;
253 /* **** Create a new audio output **** */
254 aout_DateInit( &p_adec->date, p_adec->output_format.i_rate );
255 p_adec->p_aout_input = aout_DecNew( p_adec->p_fifo,
257 &p_adec->output_format );
258 if( !p_adec->p_aout_input )
260 msg_Err( p_adec->p_fifo, "cannot create aout" );
264 /* Init the BitStream */
265 // InitBitstream( &p_adec->bit_stream, p_adec->p_fifo,
271 static void GetPESData( u8 *p_buf, int i_max, pes_packet_t *p_pes )
276 data_packet_t *p_data;
279 p_data = p_pes->p_first;
280 while( p_data != NULL && i_count < i_max )
283 i_copy = __MIN( p_data->p_payload_end - p_data->p_payload_start, i_max - i_count );
288 p_data->p_payload_start,
292 p_data = p_data->p_next;
297 if( i_count < i_max )
299 memset( p_buf, 0, i_max - i_count );
303 /*****************************************************************************
304 * DecodeThread: decodes a frame
305 *****************************************************************************/
306 static void DecodeThread( adec_thread_t *p_adec )
308 aout_buffer_t *p_aout_buffer;
309 int i_samples; // per channels
314 /* **** get samples count **** */
315 input_ExtractPES( p_adec->p_fifo, &p_pes );
318 p_adec->p_fifo->b_error = 1;
321 i_size = p_pes->i_pes_size;
323 if( p_adec->p_wf->nBlockAlign > 0 )
325 i_size -= i_size % p_adec->p_wf->nBlockAlign;
327 i_size = __MAX( i_size, p_adec->p_wf->nBlockAlign );
329 if( !i_size || !p_pes )
331 msg_Err( p_adec->p_fifo, "infinite loop..." );
335 ( ( p_adec->p_wf->wBitsPerSample + 7 ) / 8 ) /
336 p_adec->p_wf->nChannels;
338 // msg_Warn( p_adec->p_fifo, "got %d samples (%d bytes)", i_samples, i_size );
339 p_adec->pts = p_pes->i_pts;
341 /* **** Now we can output these samples **** */
343 if( p_adec->pts != 0 && p_adec->pts != aout_DateGet( &p_adec->date ) )
345 aout_DateSet( &p_adec->date, p_adec->pts );
347 else if( !aout_DateGet( &p_adec->date ) )
352 p_aout_buffer = aout_DecNewBuffer( p_adec->p_aout,
353 p_adec->p_aout_input,
357 msg_Err( p_adec->p_fifo, "cannot get aout buffer" );
358 p_adec->p_fifo->b_error = 1;
362 p_aout_buffer->start_date = aout_DateGet( &p_adec->date );
363 p_aout_buffer->end_date = aout_DateIncrement( &p_adec->date,
366 GetPESData( p_aout_buffer->p_buffer, p_aout_buffer->i_nb_bytes, p_pes );
368 aout_DecPlay( p_adec->p_aout, p_adec->p_aout_input, p_aout_buffer );
371 input_DeletePES( p_adec->p_fifo->p_packets_mgt, p_pes );
375 /*****************************************************************************
376 * EndThread : faad decoder thread destruction
377 *****************************************************************************/
378 static void EndThread (adec_thread_t *p_adec)
380 if( p_adec->p_aout_input )
382 aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );
385 msg_Dbg( p_adec->p_fifo, "raw audio decoder closed" );