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 *******************************************************************************/
61 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
62 vout_thread_t *p_vout, int *pi_status */ )
64 vpar_thread_t * p_vpar;
66 intf_DbgMsg("vpar debug: creating video parser thread\n");
68 /* Allocate the memory needed to store the thread's structure */
69 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
71 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
76 * Initialize the thread properties
82 * Initialize the input properties
84 /* Initialize the parser fifo's data lock and conditional variable and set * its buffer as empty */
85 vlc_mutex_init( &p_vpar->fifo.data_lock );
86 vlc_cond_init( &p_vpar->fifo.data_wait );
87 p_vpar->fifo.i_start = 0;
88 p_vpar->fifo.i_end = 0;
89 /* Initialize the bit stream structure */
90 p_vpar->bit_stream.p_input = p_input;
91 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
92 p_vpar->bit_stream.fifo.buffer = 0;
93 p_vpar->bit_stream.fifo.i_available = 0;
95 /* Spawn the video parser thread */
96 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func)RunThread, (void *)p_vpar) )
98 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
103 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
107 /*******************************************************************************
108 * vpar_DestroyThread: destroy a generic parser thread
109 *******************************************************************************
110 * Destroy a terminated thread. This function will return 0 if the thread could
111 * be destroyed, and non 0 else. The last case probably means that the thread
112 * was still active, and another try may succeed.
113 *******************************************************************************/
114 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
116 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
118 /* Ask thread to kill itself */
120 /* Make sure the parser thread leaves the GetByte() function */
121 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
122 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
123 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
125 /* Waiting for the parser thread to exit */
126 /* Remove this as soon as the "status" flag is implemented */
127 vlc_thread_join( p_vpar->thread_id );
130 /* following functions are local */
132 /*******************************************************************************
133 * CheckConfiguration: check vpar_CreateThread() configuration
134 *******************************************************************************
135 * Set default parameters where required. In DEBUG mode, check if configuration
137 *******************************************************************************/
139 static int CheckConfiguration( video_cfg_t *p_cfg )
147 /*******************************************************************************
148 * InitThread: initialize vpar output thread
149 *******************************************************************************
150 * This function is called from RunThread and performs the second step of the
151 * initialization. It returns 0 on success. Note that the thread's flag are not
152 * modified inside this function.
153 *******************************************************************************/
154 static int InitThread( vpar_thread_t *p_vpar )
158 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
160 /* Our first job is to initialize the bit stream structure with the
161 * beginning of the input stream */
162 vlc_mutex_lock( &p_vpar->fifo.data_lock );
163 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
165 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
167 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
168 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
169 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
173 /* Create video stream */
174 p_vpar->i_stream = vout_CreateStream( p_vpar->p_vout );
175 if( p_vpar->i_stream < 0 ) /* error */
181 /* Initialize parsing data */
182 p_vpar->sequence.p_forward = NULL;
183 p_vpar->sequence.p_backward = NULL;
184 p_vpar->sequence.intra_quant.b_allocated = 0;
185 p_vpar->sequence.nonintra_quant.b_allocated = 0;
186 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
187 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
188 /* Initialize copyright information */
189 p_vpar->sequence.b_copyright_flag = 0;
190 p_vpar->sequence.b_original = 0;
191 p_vpar->sequence.i_copyright_id = 0;
192 p_vpar->sequence.i_copyright_nb = 0;
194 /* Initialize other properties */
197 p_vpar->c_idle_loops = 0;
198 p_vpar->c_pictures = 0;
199 p_vpar->c_i_pictures = 0;
200 p_vpar->c_p_pictures = 0;
201 p_vpar->c_b_pictures = 0;
202 p_vpar->c_decoded_pictures = 0;
203 p_vpar->c_decoded_i_pictures = 0;
204 p_vpar->c_decoded_p_pictures = 0;
205 p_vpar->c_decoded_b_pictures = 0;
208 /* Initialize video FIFO */
209 vpar_InitFIFO( p_vpar );
211 bzero( p_vpar->p_vdec, NB_VDEC*sizeof(vdec_thread_t *) );
213 /* Spawn video_decoder threads */
214 /* ??? modify the number of vdecs at runtime ? */
215 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
217 if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
223 /* Initialize lookup tables */
224 #ifdef MPEG2_COMPLIANT
225 vpar_InitCrop( p_vpar );
227 InitMbAddrInc( p_vpar );
229 /* Mark thread as running and return */
230 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
234 /*******************************************************************************
235 * RunThread: generic parser thread
236 *******************************************************************************
237 * Video parser thread. This function does only returns when the thread is
239 *******************************************************************************/
240 static void RunThread( vpar_thread_t *p_vpar )
242 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
247 p_vpar->b_error = InitThread( p_vpar );
248 if( p_vpar->b_error )
255 * Main loop - it is not executed if an error occured during
258 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
260 /* Find the next sequence header in the stream */
261 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
264 p_vpar->c_sequences++;
267 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
269 /* Parse the next sequence, group or picture header */
270 if( vpar_ParseHeader( p_vpar ) )
272 /* End of sequence */
281 if( p_vpar->b_error )
283 ErrorThread( p_vpar );
291 /*******************************************************************************
292 * ErrorThread: RunThread() error loop
293 *******************************************************************************
294 * This function is called when an error occured during thread main's loop. The
295 * thread can still receive feed, but must be ready to terminate as soon as
297 *******************************************************************************/
298 static void ErrorThread( vpar_thread_t *p_vpar )
300 /* Wait until a `die' order */
301 while( !p_vpar->b_die )
303 /* We take the lock, because we are going to read/write the start/end
304 * indexes of the parser fifo */
305 vlc_mutex_lock( &p_vpar->fifo.data_lock );
307 /* ?? trash all trashable PES packets */
308 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
310 input_NetlistFreePES( p_vpar->bit_stream.p_input,
311 DECODER_FIFO_START(p_vpar->fifo) );
312 DECODER_FIFO_INCSTART( p_vpar->fifo );
315 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
317 msleep( VPAR_IDLE_SLEEP );
321 /*******************************************************************************
322 * EndThread: thread destruction
323 *******************************************************************************
324 * This function is called when the thread ends after a sucessfull
326 *******************************************************************************/
327 static void EndThread( vpar_thread_t *p_vpar )
331 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
334 /* Check for remaining PES packets */
338 /* Destroy thread structures allocated by InitThread */
339 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
342 /* Destroy vdec threads */
343 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
345 if( p_vpar->p_vdec[i_dummy] != NULL )
346 vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
351 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);