1 /*******************************************************************************
2 * video_parser.c : video parser thread
4 *******************************************************************************/
6 /* ?? passer en terminate/destroy avec les signaux supplémentaires */
8 /*******************************************************************************
10 *******************************************************************************/
18 #include <X11/extensions/XShm.h>
23 #include "vlc_thread.h"
26 #include "debug.h" /* ?? temporaire, requis par netlist.h */
29 #include "input_netlist.h"
30 #include "decoder_fifo.h"
32 #include "video_output.h"
34 #include "vdec_idct.h"
35 #include "video_decoder.h"
36 #include "vdec_motion.h"
38 #include "vpar_blocks.h"
39 #include "vpar_headers.h"
40 #include "video_fifo.h"
41 #include "vpar_synchro.h"
42 #include "video_parser.h"
47 //static int CheckConfiguration ( video_cfg_t *p_cfg );
48 static int InitThread ( vpar_thread_t *p_vpar );
49 static void RunThread ( vpar_thread_t *p_vpar );
50 static void ErrorThread ( vpar_thread_t *p_vpar );
51 static void EndThread ( vpar_thread_t *p_vpar );
53 /*******************************************************************************
54 * vpar_CreateThread: create a generic parser thread
55 *******************************************************************************
56 * This function creates a new video parser thread, and returns a pointer
57 * to its description. On error, it returns NULL.
58 * Following configuration properties are used:
60 *******************************************************************************/
62 #include "interface.h"
63 extern main_t* p_main;
64 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
65 vout_thread_t *p_vout, int *pi_status */ )
67 vpar_thread_t * p_vpar;
69 intf_DbgMsg("vpar debug: creating video parser thread\n");
71 /* Allocate the memory needed to store the thread's structure */
72 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
74 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
79 * Initialize the thread properties
85 * Initialize the input properties
87 /* Initialize the decoder fifo's data lock and conditional variable and set
88 * its buffer as empty */
89 vlc_mutex_init( &p_vpar->fifo.data_lock );
90 vlc_cond_init( &p_vpar->fifo.data_wait );
91 p_vpar->fifo.i_start = 0;
92 p_vpar->fifo.i_end = 0;
93 /* Initialize the bit stream structure */
94 p_vpar->bit_stream.p_input = p_input;
95 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
96 p_vpar->bit_stream.fifo.buffer = 0;
97 p_vpar->bit_stream.fifo.i_available = 0;
100 * Initialize the synchro properties
102 p_vpar->synchro.modulo = 0;
103 /* assume there were about 3 P and 6 B images between I's */
104 p_vpar->synchro.current_p_count = 1;
105 p_vpar->synchro.p_count_predict = 3;
106 p_vpar->synchro.current_b_count = 1;
107 p_vpar->synchro.b_count_predict = 6;
112 p_vpar->synchro.tab_p[i].mean = 3;
113 p_vpar->synchro.tab_p[i].deviation = .5;
115 p_vpar->synchro.tab_b[i].mean = 6;
116 p_vpar->synchro.tab_b[i].deviation = .5;
121 p_vpar->p_vout = p_main->p_intf->p_vout;
123 /* Spawn the video parser thread */
124 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func_t)RunThread, (void *)p_vpar) )
126 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
131 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
135 /*******************************************************************************
136 * vpar_DestroyThread: destroy a generic parser thread
137 *******************************************************************************
138 * Destroy a terminated thread. This function will return 0 if the thread could
139 * be destroyed, and non 0 else. The last case probably means that the thread
140 * was still active, and another try may succeed.
141 *******************************************************************************/
142 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
144 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
146 /* Ask thread to kill itself */
148 /* Make sure the parser thread leaves the GetByte() function */
149 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
150 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
151 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
153 /* Waiting for the parser thread to exit */
154 /* Remove this as soon as the "status" flag is implemented */
155 vlc_thread_join( p_vpar->thread_id );
158 /* following functions are local */
160 /*******************************************************************************
161 * CheckConfiguration: check vpar_CreateThread() configuration
162 *******************************************************************************
163 * Set default parameters where required. In DEBUG mode, check if configuration
165 *******************************************************************************/
167 static int CheckConfiguration( video_cfg_t *p_cfg )
175 /*******************************************************************************
176 * InitThread: initialize vpar output thread
177 *******************************************************************************
178 * This function is called from RunThread and performs the second step of the
179 * initialization. It returns 0 on success. Note that the thread's flag are not
180 * modified inside this function.
181 *******************************************************************************/
182 static int InitThread( vpar_thread_t *p_vpar )
186 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
188 /* Our first job is to initialize the bit stream structure with the
189 * beginning of the input stream */
190 vlc_mutex_lock( &p_vpar->fifo.data_lock );
191 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
193 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
195 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
196 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
197 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
199 /* Initialize parsing data */
200 p_vpar->sequence.p_forward = NULL;
201 p_vpar->sequence.p_backward = NULL;
202 p_vpar->sequence.intra_quant.b_allocated = 0;
203 p_vpar->sequence.nonintra_quant.b_allocated = 0;
204 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
205 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
206 /* Initialize copyright information */
207 p_vpar->sequence.b_copyright_flag = 0;
208 p_vpar->sequence.b_original = 0;
209 p_vpar->sequence.i_copyright_id = 0;
210 p_vpar->sequence.i_copyright_nb = 0;
212 p_vpar->picture.p_picture = NULL;
213 p_vpar->picture.i_current_structure = 0;
215 /* Initialize other properties */
218 p_vpar->c_idle_loops = 0;
219 p_vpar->c_pictures = 0;
220 p_vpar->c_i_pictures = 0;
221 p_vpar->c_p_pictures = 0;
222 p_vpar->c_b_pictures = 0;
223 p_vpar->c_decoded_pictures = 0;
224 p_vpar->c_decoded_i_pictures = 0;
225 p_vpar->c_decoded_p_pictures = 0;
226 p_vpar->c_decoded_b_pictures = 0;
229 /* Initialize video FIFO */
230 vpar_InitFIFO( p_vpar );
232 bzero( p_vpar->p_vdec, NB_VDEC*sizeof(vdec_thread_t *) );
234 /* Spawn video_decoder threads */
235 /* ??? modify the number of vdecs at runtime ? */
236 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
238 if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
244 /* Initialize lookup tables */
245 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
246 vpar_InitCrop( p_vpar );
248 vpar_InitMbAddrInc( p_vpar );
249 vpar_InitDCTTables( p_vpar );
250 vpar_InitPMBType( p_vpar );
251 vpar_InitBMBType( p_vpar );
252 vpar_InitCodedPattern( p_vpar );
253 vpar_InitDCTTables( p_vpar );
255 /* Mark thread as running and return */
256 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
260 /*******************************************************************************
261 * RunThread: generic parser thread
262 *******************************************************************************
263 * Video parser thread. This function does only returns when the thread is
265 *******************************************************************************/
266 static void RunThread( vpar_thread_t *p_vpar )
268 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
273 p_vpar->b_error = InitThread( p_vpar );
274 if( p_vpar->b_error )
281 * Main loop - it is not executed if an error occured during
284 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
286 /* Find the next sequence header in the stream */
287 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
290 p_vpar->c_sequences++;
293 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
295 /* Parse the next sequence, group or picture header */
296 if( vpar_ParseHeader( p_vpar ) )
298 /* End of sequence */
307 if( p_vpar->b_error )
309 ErrorThread( p_vpar );
317 /*******************************************************************************
318 * ErrorThread: RunThread() error loop
319 *******************************************************************************
320 * This function is called when an error occured during thread main's loop. The
321 * thread can still receive feed, but must be ready to terminate as soon as
323 *******************************************************************************/
324 static void ErrorThread( vpar_thread_t *p_vpar )
326 /* Wait until a `die' order */
327 while( !p_vpar->b_die )
329 /* We take the lock, because we are going to read/write the start/end
330 * indexes of the parser fifo */
331 vlc_mutex_lock( &p_vpar->fifo.data_lock );
333 /* ?? trash all trashable PES packets */
334 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
336 input_NetlistFreePES( p_vpar->bit_stream.p_input,
337 DECODER_FIFO_START(p_vpar->fifo) );
338 DECODER_FIFO_INCSTART( p_vpar->fifo );
341 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
343 msleep( VPAR_IDLE_SLEEP );
347 /*******************************************************************************
348 * EndThread: thread destruction
349 *******************************************************************************
350 * This function is called when the thread ends after a sucessfull
352 *******************************************************************************/
353 static void EndThread( vpar_thread_t *p_vpar )
357 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
360 /* Check for remaining PES packets */
364 /* Destroy thread structures allocated by InitThread */
365 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
368 /* Destroy vdec threads */
369 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
371 if( p_vpar->p_vdec[i_dummy] != NULL )
372 vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
377 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);