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"
33 #include "video_decoder.h"
34 #include "video_parser.h"
35 #include "parser_fifo.h"
40 //static int CheckConfiguration ( video_cfg_t *p_cfg );
41 static int InitThread ( vpar_thread_t *p_vpar );
42 static void RunThread ( vpar_thread_t *p_vpar );
43 static void ErrorThread ( vpar_thread_t *p_vpar );
44 static void EndThread ( vpar_thread_t *p_vpar );
46 /*******************************************************************************
47 * vpar_CreateThread: create a generic parser thread
48 *******************************************************************************
49 * This function creates a new video parser thread, and returns a pointer
50 * to its description. On error, it returns NULL.
51 * Following configuration properties are used:
53 *******************************************************************************/
54 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
55 vout_thread_t *p_vout, int *pi_status */ )
57 vpar_thread_t * p_vpar;
59 intf_DbgMsg("vpar debug: creating video parser thread\n");
61 /* Allocate the memory needed to store the thread's structure */
62 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
64 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
69 * Initialize the thread properties
75 * Initialize the input properties
77 /* Initialize the parser fifo's data lock and conditional variable and set * its buffer as empty */
78 vlc_mutex_init( &p_vpar->fifo.data_lock );
79 vlc_cond_init( &p_vpar->fifo.data_wait );
80 p_vpar->fifo.i_start = 0;
81 p_vpar->fifo.i_end = 0;
82 /* Initialize the bit stream structure */
83 p_vpar->bit_stream.p_input = p_input;
84 p_vpar->bit_stream.p_parser_fifo = &p_vpar->fifo;
85 p_vpar->bit_stream.fifo.buffer = 0;
86 p_vpar->bit_stream.fifo.i_available = 0;
88 /* Spawn the video parser thread */
89 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func)RunThread, (void *)p_vpar) )
91 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
96 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
100 /*******************************************************************************
101 * vpar_DestroyThread: destroy a generic parser thread
102 *******************************************************************************
103 * Destroy a terminated thread. This function will return 0 if the thread could
104 * be destroyed, and non 0 else. The last case probably means that the thread
105 * was still active, and another try may succeed.
106 *******************************************************************************/
107 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
109 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
111 /* Ask thread to kill itself */
113 /* Make sure the parser thread leaves the GetByte() function */
114 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
115 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
116 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
118 /* Waiting for the parser thread to exit */
119 /* Remove this as soon as the "status" flag is implemented */
120 vlc_thread_join( p_vpar->thread_id );
123 /* following functions are local */
125 /*******************************************************************************
126 * CheckConfiguration: check vpar_CreateThread() configuration
127 *******************************************************************************
128 * Set default parameters where required. In DEBUG mode, check if configuration
130 *******************************************************************************/
132 static int CheckConfiguration( video_cfg_t *p_cfg )
140 /*******************************************************************************
141 * InitThread: initialize vpar output thread
142 *******************************************************************************
143 * This function is called from RunThread and performs the second step of the
144 * initialization. It returns 0 on success. Note that the thread's flag are not
145 * modified inside this function.
146 *******************************************************************************/
147 static int InitThread( vpar_thread_t *p_vpar )
150 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
152 /* Our first job is to initialize the bit stream structure with the
153 * beginning of the input stream */
154 vlc_mutex_lock( &p_vpar->fifo.data_lock );
155 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
157 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
159 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
160 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
161 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
165 /* Create video stream */
166 p_vpar->i_stream = vout_CreateStream( p_vpar->p_vout );
167 if( p_vpar->i_stream < 0 ) /* error */
173 /* Initialize parsing data */
174 p_vpar->sequence.p_forward = p_vpar->sequence.p_backward = NULL;
175 p_vpar->sequence.p_frame_lum_lookup
176 = p_vpar->sequence.p_field_lum_lookup
177 = p_vpar->sequence.p_frame_chroma_lookup
178 = p_vpar->sequence.p_field_chroma_lookup
180 p_vpar->sequence.intra_quant.b_allocated = FALSE;
181 p_vpar->sequence.nonintra_quant.b_allocated = FALSE;
182 p_vpar->sequence.chroma_intra_quant.b_allocated = FALSE;
183 p_vpar->sequence.chroma_nonintra_quant.b_allocated = FALSE;
185 /* Initialize other properties */
188 p_vpar->c_idle_loops = 0;
189 p_vpar->c_pictures = 0;
190 p_vpar->c_i_pictures = 0;
191 p_vpar->c_p_pictures = 0;
192 p_vpar->c_b_pictures = 0;
193 p_vpar->c_decoded_pictures = 0;
194 p_vpar->c_decoded_i_pictures = 0;
195 p_vpar->c_decoded_p_pictures = 0;
196 p_vpar->c_decoded_b_pictures = 0;
199 /* Initialize video FIFO */
200 vpar_InitFIFO( p_vpar );
202 bzero( p_vpar->p_vdec, MAX_VDEC*sizeof(vdec_thread_t *) );
204 /* Spawn a video_decoder thread */
205 /* ??? add the possibility to launch multiple vdec threads */
206 if( (p_vpar->p_vdec[0] = vdec_CreateThread( p_vpar )) == NULL )
211 /* Mark thread as running and return */
212 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
216 /*******************************************************************************
217 * RunThread: generic parser thread
218 *******************************************************************************
219 * Video parser thread. This function does only returns when the thread is
221 *******************************************************************************/
222 static void RunThread( vpar_thread_t *p_vpar )
226 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
231 p_vpar->b_error = InitThread( p_vpar );
232 if( p_vpar->b_error )
239 * Main loop - it is not executed if an error occured during
242 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
244 /* Find the next sequence header in the stream */
245 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
248 p_vpar->c_sequences++;
251 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
253 /* Parse the next sequence, group or picture header */
254 if( vpar_ParseHeader( p_vpar ) )
256 /* End of sequence */
265 if( p_vpar->b_error )
267 ErrorThread( p_vpar );
275 /*******************************************************************************
276 * ErrorThread: RunThread() error loop
277 *******************************************************************************
278 * This function is called when an error occured during thread main's loop. The
279 * thread can still receive feed, but must be ready to terminate as soon as
281 *******************************************************************************/
282 static void ErrorThread( vpar_thread_t *p_vpar )
284 /* Wait until a `die' order */
285 while( !p_vpar->b_die )
287 /* We take the lock, because we are going to read/write the start/end
288 * indexes of the parser fifo */
289 vlc_mutex_lock( &p_vpar->fifo.data_lock );
291 /* ?? trash all trashable PES packets */
292 while( !PARSER_FIFO_ISEMPTY(p_vpar->fifo) )
294 input_NetlistFreePES( p_vpar->bit_stream.p_input, PARSER_FIFO_START(p_vpar->fifo) );
295 PARSER_FIFO_INCSTART( p_vpar->fifo );
298 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
300 msleep( VPAR_IDLE_SLEEP );
304 /*******************************************************************************
305 * EndThread: thread destruction
306 *******************************************************************************
307 * This function is called when the thread ends after a sucessfull
309 *******************************************************************************/
310 static void EndThread( vpar_thread_t *p_vpar )
314 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
317 /* Check for remaining PES packets */
321 /* Destroy thread structures allocated by InitThread */
322 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
325 /* Destroy vdec threads */
326 for( i_dummy = 0; i_dummy < MAX_VDEC; i_dummy++ )
328 if( p_vpar->p_vdec[i_dummy] != NULL )
329 vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
334 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);