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 )
151 intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
153 /* Our first job is to initialize the bit stream structure with the
154 * beginning of the input stream */
155 vlc_mutex_lock( &p_vpar->fifo.data_lock );
156 while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
158 vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
160 p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
161 p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
162 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
166 /* Create video stream */
167 p_vpar->i_stream = vout_CreateStream( p_vpar->p_vout );
168 if( p_vpar->i_stream < 0 ) /* error */
174 /* Initialize parsing data */
175 p_vpar->sequence.p_forward = p_vpar->sequence.p_backward = NULL;
176 p_vpar->sequence.p_frame_lum_lookup
177 = p_vpar->sequence.p_field_lum_lookup
178 = p_vpar->sequence.p_frame_chroma_lookup
179 = p_vpar->sequence.p_field_chroma_lookup
181 p_vpar->sequence.intra_quant.b_allocated = FALSE;
182 p_vpar->sequence.nonintra_quant.b_allocated = FALSE;
183 p_vpar->sequence.chroma_intra_quant.b_allocated = FALSE;
184 p_vpar->sequence.chroma_nonintra_quant.b_allocated = FALSE;
185 p_vpar->sequence.i_frame_number = 0;
187 /* Initialize other properties */
190 p_vpar->c_idle_loops = 0;
191 p_vpar->c_pictures = 0;
192 p_vpar->c_i_pictures = 0;
193 p_vpar->c_p_pictures = 0;
194 p_vpar->c_b_pictures = 0;
195 p_vpar->c_decoded_pictures = 0;
196 p_vpar->c_decoded_i_pictures = 0;
197 p_vpar->c_decoded_p_pictures = 0;
198 p_vpar->c_decoded_b_pictures = 0;
201 /* Initialize video FIFO */
202 vpar_InitFIFO( p_vpar );
204 bzero( p_vpar->p_vdec, MAX_VDEC*sizeof(vdec_thread_t *) );
206 /* Spawn video_decoder threads */
207 /* ??? modify the number of vdecs at runtime ? */
208 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
210 if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
216 /* Mark thread as running and return */
217 intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
221 /*******************************************************************************
222 * RunThread: generic parser thread
223 *******************************************************************************
224 * Video parser thread. This function does only returns when the thread is
226 *******************************************************************************/
227 static void RunThread( vpar_thread_t *p_vpar )
231 intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
236 p_vpar->b_error = InitThread( p_vpar );
237 if( p_vpar->b_error )
244 * Main loop - it is not executed if an error occured during
247 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
249 /* Find the next sequence header in the stream */
250 p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );
253 p_vpar->c_sequences++;
256 while( (!p_vpar->b_die) && (!p_vpar->b_error) )
258 /* Parse the next sequence, group or picture header */
259 if( vpar_ParseHeader( p_vpar ) )
261 /* End of sequence */
270 if( p_vpar->b_error )
272 ErrorThread( p_vpar );
280 /*******************************************************************************
281 * ErrorThread: RunThread() error loop
282 *******************************************************************************
283 * This function is called when an error occured during thread main's loop. The
284 * thread can still receive feed, but must be ready to terminate as soon as
286 *******************************************************************************/
287 static void ErrorThread( vpar_thread_t *p_vpar )
289 /* Wait until a `die' order */
290 while( !p_vpar->b_die )
292 /* We take the lock, because we are going to read/write the start/end
293 * indexes of the parser fifo */
294 vlc_mutex_lock( &p_vpar->fifo.data_lock );
296 /* ?? trash all trashable PES packets */
297 while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
299 input_NetlistFreePES( p_vpar->bit_stream.p_input,
300 DECODER_FIFO_START(p_vpar->fifo) );
301 DECODER_FIFO_INCSTART( p_vpar->fifo );
304 vlc_mutex_unlock( &p_vpar->fifo.data_lock );
306 msleep( VPAR_IDLE_SLEEP );
310 /*******************************************************************************
311 * EndThread: thread destruction
312 *******************************************************************************
313 * This function is called when the thread ends after a sucessfull
315 *******************************************************************************/
316 static void EndThread( vpar_thread_t *p_vpar )
320 intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
323 /* Check for remaining PES packets */
327 /* Destroy thread structures allocated by InitThread */
328 // vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
331 /* Destroy vdec threads */
332 for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
334 if( p_vpar->p_vdec[i_dummy] != NULL )
335 vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
340 intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);