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 "video_parser.h"
46 //static int CheckConfiguration ( video_cfg_t *p_cfg );
47 static int InitThread ( vpar_thread_t *p_vpar );
48 static void RunThread ( vpar_thread_t *p_vpar );
49 static void ErrorThread ( vpar_thread_t *p_vpar );
50 static void EndThread ( vpar_thread_t *p_vpar );
52 /*******************************************************************************
53 * vpar_CreateThread: create a generic parser thread
54 *******************************************************************************
55 * This function creates a new video parser thread, and returns a pointer
56 * to its description. On error, it returns NULL.
57 * Following configuration properties are used:
59 *******************************************************************************/
60 vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
61 vout_thread_t *p_vout, int *pi_status */ )
63 vpar_thread_t * p_vpar;
65 intf_DbgMsg("vpar debug: creating video parser thread\n");
67 /* Allocate the memory needed to store the thread's structure */
68 if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
70 intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
75 * Initialize the thread properties
81 * Initialize the input properties
83 /* Initialize the parser fifo's data lock and conditional variable and set * its buffer as empty */
84 vlc_mutex_init( &p_vpar->fifo.data_lock );
85 vlc_cond_init( &p_vpar->fifo.data_wait );
86 p_vpar->fifo.i_start = 0;
87 p_vpar->fifo.i_end = 0;
88 /* Initialize the bit stream structure */
89 p_vpar->bit_stream.p_input = p_input;
90 p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
91 p_vpar->bit_stream.fifo.buffer = 0;
92 p_vpar->bit_stream.fifo.i_available = 0;
94 /* Spawn the video parser thread */
95 if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func)RunThread, (void *)p_vpar) )
97 intf_ErrMsg("vpar error: can't spawn video parser thread\n");
102 intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
106 /*******************************************************************************
107 * vpar_DestroyThread: destroy a generic parser thread
108 *******************************************************************************
109 * Destroy a terminated thread. This function will return 0 if the thread could
110 * be destroyed, and non 0 else. The last case probably means that the thread
111 * was still active, and another try may succeed.
112 *******************************************************************************/
113 void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
115 intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
117 /* Ask thread to kill itself */
119 /* Make sure the parser thread leaves the GetByte() function */
120 vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
121 vlc_cond_signal( &(p_vpar->fifo.data_wait) );
122 vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
124 /* Waiting for the parser thread to exit */
125 /* Remove this as soon as the "status" flag is implemented */
126 vlc_thread_join( p_vpar->thread_id );
129 /* following functions are local */
131 /*******************************************************************************
132 * CheckConfiguration: check vpar_CreateThread() configuration
133 *******************************************************************************
134 * Set default parameters where required. In DEBUG mode, check if configuration
136 *******************************************************************************/
138 static int CheckConfiguration( video_cfg_t *p_cfg )
146 /*******************************************************************************
147 * InitThread: initialize vpar output thread
148 *******************************************************************************
149 * This function is called from RunThread and performs the second step of the
150 * initialization. It returns 0 on success. Note that the thread's flag are not
151 * modified inside this function.
152 *******************************************************************************/
153 static int InitThread( vpar_thread_t *p_vpar )
157 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
159 /* Our first job is to initialize the bit stream structure with the
160 * beginning of the input stream */
161 vlc_mutex_lock( &p_vpar->fifo.data_lock );
162 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
164 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
166 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
167 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
168 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
172 /* Create video stream */
173 p_vpar->i_stream = vout_CreateStream( p_vpar->p_vout );
174 if( p_vpar->i_stream < 0 ) /* error */
180 /* Initialize parsing data */
181 p_vpar->sequence.p_forward = NULL;
182 p_vpar->sequence.p_backward = NULL;
183 p_vpar->sequence.intra_quant.b_allocated = 0;
184 p_vpar->sequence.nonintra_quant.b_allocated = 0;
185 p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
186 p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
187 /* Initialize copyright information */
188 p_vpar->sequence.b_copyright_flag = 0;
189 p_vpar->sequence.b_original = 0;
190 p_vpar->sequence.i_copyright_id = 0;
191 p_vpar->sequence.i_copyright_nb = 0;
193 /* Initialize other properties */
196 p_vpar->c_idle_loops = 0;
197 p_vpar->c_pictures = 0;
198 p_vpar->c_i_pictures = 0;
199 p_vpar->c_p_pictures = 0;
200 p_vpar->c_b_pictures = 0;
201 p_vpar->c_decoded_pictures = 0;
202 p_vpar->c_decoded_i_pictures = 0;
203 p_vpar->c_decoded_p_pictures = 0;
204 p_vpar->c_decoded_b_pictures = 0;
207 /* Initialize video FIFO */
208 vpar_InitFIFO( p_vpar );
210 bzero( p_vpar->p_vdec, NB_VDEC*sizeof(vdec_thread_t *) );
212 /* Spawn video_decoder threads */
213 /* ??? modify the number of vdecs at runtime ? */
214 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
216 if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
222 /* Mark thread as running and return */
223 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
227 /*******************************************************************************
228 * RunThread: generic parser thread
229 *******************************************************************************
230 * Video parser thread. This function does only returns when the thread is
232 *******************************************************************************/
233 static void RunThread( vpar_thread_t *p_vpar )
235 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
240 p_vpar->b_error = InitThread( p_vpar );
241 if( p_vpar->b_error )
248 * Main loop - it is not executed if an error occured during
251 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
253 /* Find the next sequence header in the stream */
254 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
257 p_vpar->c_sequences++;
260 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
262 /* Parse the next sequence, group or picture header */
263 if( vpar_ParseHeader( p_vpar ) )
265 /* End of sequence */
274 if( p_vpar->b_error )
276 ErrorThread( p_vpar );
284 /*******************************************************************************
285 * ErrorThread: RunThread() error loop
286 *******************************************************************************
287 * This function is called when an error occured during thread main's loop. The
288 * thread can still receive feed, but must be ready to terminate as soon as
290 *******************************************************************************/
291 static void ErrorThread( vpar_thread_t *p_vpar )
293 /* Wait until a `die' order */
294 while( !p_vpar->b_die )
296 /* We take the lock, because we are going to read/write the start/end
297 * indexes of the parser fifo */
298 vlc_mutex_lock( &p_vpar->fifo.data_lock );
300 /* ?? trash all trashable PES packets */
301 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
303 input_NetlistFreePES( p_vpar->bit_stream.p_input,
304 DECODER_FIFO_START(p_vpar->fifo) );
305 DECODER_FIFO_INCSTART( p_vpar->fifo );
308 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
310 msleep( VPAR_IDLE_SLEEP );
314 /*******************************************************************************
315 * EndThread: thread destruction
316 *******************************************************************************
317 * This function is called when the thread ends after a sucessfull
319 *******************************************************************************/
320 static void EndThread( vpar_thread_t *p_vpar )
324 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
327 /* Check for remaining PES packets */
331 /* Destroy thread structures allocated by InitThread */
332 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
335 /* Destroy vdec threads */
336 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
338 if( p_vpar->p_vdec[i_dummy] != NULL )
339 vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
344 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);