1 /*****************************************************************************
2 * video_parser.c : video parser thread
4 *****************************************************************************/
6 /* ?? passer en terminate/destroy avec les signaux supplémentaires */
8 /*****************************************************************************
10 *****************************************************************************/
21 #include "vlc_thread.h"
24 #include "debug.h" /* ?? temporaire, requis par netlist.h */
27 #include "input_netlist.h"
28 #include "decoder_fifo.h"
30 #include "video_output.h"
32 #include "vdec_idct.h"
33 #include "video_decoder.h"
34 #include "vdec_motion.h"
36 #include "vpar_blocks.h"
37 #include "vpar_headers.h"
38 #include "vpar_synchro.h"
39 #include "video_parser.h"
40 #include "video_fifo.h"
45 //static int CheckConfiguration ( video_cfg_t *p_cfg );
46 static int InitThread ( vpar_thread_t *p_vpar );
47 static void RunThread ( vpar_thread_t *p_vpar );
48 static void ErrorThread ( vpar_thread_t *p_vpar );
49 static void EndThread ( vpar_thread_t *p_vpar );
51 /*****************************************************************************
52 * vpar_CreateThread: create a generic parser thread
53 *****************************************************************************
54 * This function creates a new video parser thread, and returns a pointer
55 * to its description. On error, it returns NULL.
56 * Following configuration properties are used:
58 *****************************************************************************/
60 #include "interface.h"
61 extern main_t* p_main;
62 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
63 vout_thread_t *p_vout, int *pi_status */ )
65 vpar_thread_t * p_vpar;
67 intf_DbgMsg("vpar debug: creating video parser thread\n");
69 /* Allocate the memory needed to store the thread's structure */
70 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
72 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
77 * Initialize the thread properties
83 * Initialize the input properties
85 /* Initialize the decoder fifo's data lock and conditional variable and set
86 * its buffer as empty */
87 vlc_mutex_init( &p_vpar->fifo.data_lock );
88 vlc_cond_init( &p_vpar->fifo.data_wait );
89 p_vpar->fifo.i_start = 0;
90 p_vpar->fifo.i_end = 0;
91 /* Initialize the bit stream structure */
92 p_vpar->bit_stream.p_input = p_input;
93 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
94 p_vpar->bit_stream.fifo.buffer = 0;
95 p_vpar->bit_stream.fifo.i_available = 0;
98 p_vpar->p_vout = p_main->p_intf->p_vout;
100 /* Spawn the video parser thread */
101 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func_t)RunThread, (void *)p_vpar) )
103 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
108 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
112 /*****************************************************************************
113 * vpar_DestroyThread: destroy a generic parser thread
114 *****************************************************************************
115 * Destroy a terminated thread. This function will return 0 if the thread could
116 * be destroyed, and non 0 else. The last case probably means that the thread
117 * was still active, and another try may succeed.
118 *****************************************************************************/
119 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
121 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
123 /* Ask thread to kill itself */
125 /* Make sure the parser thread leaves the GetByte() function */
126 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
127 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
128 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
130 /* Waiting for the parser thread to exit */
131 /* Remove this as soon as the "status" flag is implemented */
132 vlc_thread_join( p_vpar->thread_id );
135 /* following functions are local */
137 /*****************************************************************************
138 * CheckConfiguration: check vpar_CreateThread() configuration
139 *****************************************************************************
140 * Set default parameters where required. In DEBUG mode, check if configuration
142 *****************************************************************************/
144 static int CheckConfiguration( video_cfg_t *p_cfg )
152 /*****************************************************************************
153 * InitThread: initialize vpar output thread
154 *****************************************************************************
155 * This function is called from RunThread and performs the second step of the
156 * initialization. It returns 0 on success. Note that the thread's flag are not
157 * modified inside this function.
158 *****************************************************************************/
159 static int InitThread( vpar_thread_t *p_vpar )
169 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
171 /* Our first job is to initialize the bit stream structure with the
172 * beginning of the input stream */
173 vlc_mutex_lock( &p_vpar->fifo.data_lock );
174 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
178 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
181 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
183 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
184 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
185 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
187 /* Initialize parsing data */
188 p_vpar->sequence.p_forward = NULL;
189 p_vpar->sequence.p_backward = NULL;
190 p_vpar->sequence.intra_quant.b_allocated = 0;
191 p_vpar->sequence.nonintra_quant.b_allocated = 0;
192 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
193 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
195 /* Initialize copyright information */
196 p_vpar->sequence.b_copyright_flag = 0;
197 p_vpar->sequence.b_original = 0;
198 p_vpar->sequence.i_copyright_id = 0;
199 p_vpar->sequence.i_copyright_nb = 0;
201 p_vpar->picture.p_picture = NULL;
202 p_vpar->picture.i_current_structure = 0;
204 /* Initialize other properties */
207 p_vpar->c_idle_loops = 0;
208 p_vpar->c_pictures = 0;
209 p_vpar->c_i_pictures = 0;
210 p_vpar->c_p_pictures = 0;
211 p_vpar->c_b_pictures = 0;
212 p_vpar->c_decoded_pictures = 0;
213 p_vpar->c_decoded_i_pictures = 0;
214 p_vpar->c_decoded_p_pictures = 0;
215 p_vpar->c_decoded_b_pictures = 0;
218 /* Initialize video FIFO */
219 vpar_InitFIFO( p_vpar );
221 memset( p_vpar->pp_vdec, 0, NB_VDEC*sizeof(vdec_thread_t *) );
224 /* Spawn video_decoder threads */
225 /* ??? modify the number of vdecs at runtime ? */
226 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
228 if( (p_vpar->pp_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
234 /* Fake a video_decoder thread */
235 if( (p_vpar->pp_vdec[0] = (vdec_thread_t *)malloc(sizeof( vdec_thread_t ))) == NULL
236 || vdec_InitThread( p_vpar->pp_vdec[0] ) )
240 p_vpar->pp_vdec[0]->b_die = 0;
241 p_vpar->pp_vdec[0]->b_error = 0;
242 p_vpar->pp_vdec[0]->p_vpar = p_vpar;
245 /* Initialize lookup tables */
246 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
247 vpar_InitCrop( p_vpar );
249 vpar_InitMbAddrInc( p_vpar );
250 vpar_InitDCTTables( p_vpar );
251 vpar_InitPMBType( p_vpar );
252 vpar_InitBMBType( p_vpar );
253 vpar_InitDCTTables( p_vpar );
257 * Initialize the synchro properties
260 p_vpar->synchro.i_last_decode_pts = 0;
261 p_vpar->synchro.i_last_display_pts = 0;
262 p_vpar->synchro.i_images_since_pts = 0;
264 p_vpar->synchro.i_last_i_pts = 0;
265 p_vpar->synchro.theorical_fps = 25;
266 p_vpar->synchro.i_last_nondropped_i_pts = 0;
267 p_vpar->synchro.actual_fps = 20;
269 p_vpar->synchro.i_fifo_start = 0;
270 p_vpar->synchro.i_fifo_stop = 0;
272 p_vpar->synchro.modulo = 0;
273 /* mean decoding time - at least 200 ms for a slow machine */
274 p_vpar->synchro.i_mean_decode_time = 200000;
275 /* assume we can display all Is and 2 Ps */
276 p_vpar->synchro.can_display_i = 1;
277 p_vpar->synchro.can_display_p = 0;
278 p_vpar->synchro.displayable_p = 2;
279 p_vpar->synchro.can_display_b = 0;
280 p_vpar->synchro.displayable_b = 0;
281 /* assume there were about 3 P and 6 B images between I's */
282 p_vpar->synchro.current_p_count = 1;
283 p_vpar->synchro.nondropped_p_count = 1;
284 p_vpar->synchro.p_count_predict = 3;
285 p_vpar->synchro.current_b_count = 1;
286 p_vpar->synchro.nondropped_b_count = 1;
287 p_vpar->synchro.b_count_predict = 6;
288 for( i_dummy = 0; i_dummy < 6; i_dummy++)
290 p_vpar->synchro.tab_p[i_dummy].mean = 3;
291 p_vpar->synchro.tab_p[i_dummy].deviation = .5;
292 p_vpar->synchro.tab_b[i_dummy].mean = 6;
293 p_vpar->synchro.tab_b[i_dummy].deviation = .5;
296 p_vpar->synchro.kludge_level = 5;
297 p_vpar->synchro.kludge_nbp = p_vpar->synchro.kludge_p = 5;
298 p_vpar->synchro.kludge_nbb = p_vpar->synchro.kludge_b = 6;
299 p_vpar->synchro.kludge_b = 0;
300 p_vpar->synchro.kludge_prevdate = 0;
303 /* Mark thread as running and return */
304 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
308 /*****************************************************************************
309 * RunThread: generic parser thread
310 *****************************************************************************
311 * Video parser thread. This function does only returns when the thread is
313 *****************************************************************************/
314 static void RunThread( vpar_thread_t *p_vpar )
316 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
321 p_vpar->b_error = InitThread( p_vpar );
326 * Main loop - it is not executed if an error occured during
329 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
331 /* Find the next sequence header in the stream */
332 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
335 p_vpar->c_sequences++;
338 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
340 /* Parse the next sequence, group or picture header */
341 if( vpar_ParseHeader( p_vpar ) )
343 /* End of sequence */
352 if( p_vpar->b_error )
354 ErrorThread( p_vpar );
363 /*****************************************************************************
364 * ErrorThread: RunThread() error loop
365 *****************************************************************************
366 * This function is called when an error occured during thread main's loop. The
367 * thread can still receive feed, but must be ready to terminate as soon as
369 *****************************************************************************/
370 static void ErrorThread( vpar_thread_t *p_vpar )
372 /* We take the lock, because we are going to read/write the start/end
373 * indexes of the decoder fifo */
374 vlc_mutex_lock( &p_vpar->fifo.data_lock );
376 /* Wait until a `die' order is sent */
377 while( !p_vpar->b_die )
379 /* Trash all received PES packets */
380 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
382 input_NetlistFreePES( p_vpar->bit_stream.p_input, DECODER_FIFO_START(p_vpar->fifo) );
383 DECODER_FIFO_INCSTART( p_vpar->fifo );
386 /* Waiting for the input thread to put new PES packets in the fifo */
387 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
390 /* We can release the lock before leaving */
391 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
394 /*****************************************************************************
395 * EndThread: thread destruction
396 *****************************************************************************
397 * This function is called when the thread ends after a sucessfull
399 *****************************************************************************/
400 static void EndThread( vpar_thread_t *p_vpar )
406 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
409 /* Check for remaining PES packets */
413 /* Destroy thread structures allocated by InitThread */
414 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
417 /* Dispose of matrices if they have been allocated. */
418 if( p_vpar->sequence.intra_quant.b_allocated )
420 free( p_vpar->sequence.intra_quant.pi_matrix );
422 if( p_vpar->sequence.nonintra_quant.b_allocated )
424 free( p_vpar->sequence.nonintra_quant.pi_matrix) ;
426 if( p_vpar->sequence.chroma_intra_quant.b_allocated )
428 free( p_vpar->sequence.chroma_intra_quant.pi_matrix );
430 if( p_vpar->sequence.chroma_nonintra_quant.b_allocated )
432 free( p_vpar->sequence.chroma_nonintra_quant.pi_matrix );
436 /* Destroy vdec threads */
437 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
439 if( p_vpar->pp_vdec[i_dummy] != NULL )
440 vdec_DestroyThread( p_vpar->pp_vdec[i_dummy] );
445 free( p_vpar->pp_vdec[0] );
450 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);