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 decoder fifo's data lock and conditional variable and set
85 * its buffer as empty */
86 vlc_mutex_init( &p_vpar->fifo.data_lock );
87 vlc_cond_init( &p_vpar->fifo.data_wait );
88 p_vpar->fifo.i_start = 0;
89 p_vpar->fifo.i_end = 0;
90 /* Initialize the bit stream structure */
91 p_vpar->bit_stream.p_input = p_input;
92 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
93 p_vpar->bit_stream.fifo.buffer = 0;
94 p_vpar->bit_stream.fifo.i_available = 0;
96 /* Spawn the video parser thread */
97 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func_t)RunThread, (void *)p_vpar) )
99 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
104 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
108 /*******************************************************************************
109 * vpar_DestroyThread: destroy a generic parser thread
110 *******************************************************************************
111 * Destroy a terminated thread. This function will return 0 if the thread could
112 * be destroyed, and non 0 else. The last case probably means that the thread
113 * was still active, and another try may succeed.
114 *******************************************************************************/
115 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
117 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
119 /* Ask thread to kill itself */
121 /* Make sure the parser thread leaves the GetByte() function */
122 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
123 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
124 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
126 /* Waiting for the parser thread to exit */
127 /* Remove this as soon as the "status" flag is implemented */
128 vlc_thread_join( p_vpar->thread_id );
131 /* following functions are local */
133 /*******************************************************************************
134 * CheckConfiguration: check vpar_CreateThread() configuration
135 *******************************************************************************
136 * Set default parameters where required. In DEBUG mode, check if configuration
138 *******************************************************************************/
140 static int CheckConfiguration( video_cfg_t *p_cfg )
148 /*******************************************************************************
149 * InitThread: initialize vpar output thread
150 *******************************************************************************
151 * This function is called from RunThread and performs the second step of the
152 * initialization. It returns 0 on success. Note that the thread's flag are not
153 * modified inside this function.
154 *******************************************************************************/
155 static int InitThread( vpar_thread_t *p_vpar )
159 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
161 /* Our first job is to initialize the bit stream structure with the
162 * beginning of the input stream */
163 vlc_mutex_lock( &p_vpar->fifo.data_lock );
164 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
166 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
168 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
169 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
170 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
174 /* Create video stream */
175 p_vpar->i_stream = vout_CreateStream( p_vpar->p_vout );
176 if( p_vpar->i_stream < 0 ) /* error */
182 /* Initialize parsing data */
183 p_vpar->sequence.p_forward = NULL;
184 p_vpar->sequence.p_backward = NULL;
185 p_vpar->sequence.intra_quant.b_allocated = 0;
186 p_vpar->sequence.nonintra_quant.b_allocated = 0;
187 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
188 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
189 /* Initialize copyright information */
190 p_vpar->sequence.b_copyright_flag = 0;
191 p_vpar->sequence.b_original = 0;
192 p_vpar->sequence.i_copyright_id = 0;
193 p_vpar->sequence.i_copyright_nb = 0;
195 /* Initialize other properties */
198 p_vpar->c_idle_loops = 0;
199 p_vpar->c_pictures = 0;
200 p_vpar->c_i_pictures = 0;
201 p_vpar->c_p_pictures = 0;
202 p_vpar->c_b_pictures = 0;
203 p_vpar->c_decoded_pictures = 0;
204 p_vpar->c_decoded_i_pictures = 0;
205 p_vpar->c_decoded_p_pictures = 0;
206 p_vpar->c_decoded_b_pictures = 0;
209 /* Initialize video FIFO */
210 vpar_InitFIFO( p_vpar );
212 bzero( p_vpar->p_vdec, NB_VDEC*sizeof(vdec_thread_t *) );
214 /* Spawn video_decoder threads */
215 /* ??? modify the number of vdecs at runtime ? */
216 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
218 if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
224 /* Initialize lookup tables */
225 #if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
226 vpar_InitCrop( p_vpar );
228 InitMbAddrInc( p_vpar );
229 InitDCTTables( p_vpar );
230 InitPMBType( p_vpar );
231 InitBMBType( p_vpar );
232 InitCodedPattern( p_vpar );
234 /* Mark thread as running and return */
235 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
239 /*******************************************************************************
240 * RunThread: generic parser thread
241 *******************************************************************************
242 * Video parser thread. This function does only returns when the thread is
244 *******************************************************************************/
245 static void RunThread( vpar_thread_t *p_vpar )
247 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
252 p_vpar->b_error = InitThread( p_vpar );
253 if( p_vpar->b_error )
260 * Main loop - it is not executed if an error occured during
263 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
265 /* Find the next sequence header in the stream */
266 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
269 p_vpar->c_sequences++;
272 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
274 /* Parse the next sequence, group or picture header */
275 if( vpar_ParseHeader( p_vpar ) )
277 /* End of sequence */
286 if( p_vpar->b_error )
288 ErrorThread( p_vpar );
296 /*******************************************************************************
297 * ErrorThread: RunThread() error loop
298 *******************************************************************************
299 * This function is called when an error occured during thread main's loop. The
300 * thread can still receive feed, but must be ready to terminate as soon as
302 *******************************************************************************/
303 static void ErrorThread( vpar_thread_t *p_vpar )
305 /* Wait until a `die' order */
306 while( !p_vpar->b_die )
308 /* We take the lock, because we are going to read/write the start/end
309 * indexes of the parser fifo */
310 vlc_mutex_lock( &p_vpar->fifo.data_lock );
312 /* ?? trash all trashable PES packets */
313 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
315 input_NetlistFreePES( p_vpar->bit_stream.p_input,
316 DECODER_FIFO_START(p_vpar->fifo) );
317 DECODER_FIFO_INCSTART( p_vpar->fifo );
320 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
322 msleep( VPAR_IDLE_SLEEP );
326 /*******************************************************************************
327 * EndThread: thread destruction
328 *******************************************************************************
329 * This function is called when the thread ends after a sucessfull
331 *******************************************************************************/
332 static void EndThread( vpar_thread_t *p_vpar )
336 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
339 /* Check for remaining PES packets */
343 /* Destroy thread structures allocated by InitThread */
344 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
347 /* Destroy vdec threads */
348 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
350 if( p_vpar->p_vdec[i_dummy] != NULL )
351 vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
356 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);