1 /*****************************************************************************
2 * lpcm_decoder_thread.c: lpcm decoder thread
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: lpcm_decoder_thread.c,v 1.12 2001/04/02 23:30:41 sam Exp $
7 * Authors: Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
29 #include <unistd.h> /* getpid() */
31 #include <stdio.h> /* "intf_msg.h" */
32 #include <stdlib.h> /* malloc(), free() */
39 #include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
41 #include "stream_control.h"
42 #include "input_ext-dec.h"
44 #include "audio_output.h"
46 #include "lpcm_decoder.h"
47 #include "lpcm_decoder_thread.h"
49 #define LPCMDEC_FRAME_SIZE (2*1536) /* May be useless */
51 /*****************************************************************************
53 *****************************************************************************/
54 static int InitThread (lpcmdec_thread_t * p_adec);
55 static void RunThread (lpcmdec_thread_t * p_adec);
56 static void ErrorThread (lpcmdec_thread_t * p_adec);
57 static void EndThread (lpcmdec_thread_t * p_adec);
59 /*****************************************************************************
60 * lpcmdec_CreateThread: creates an lpcm decoder thread
61 *****************************************************************************/
62 vlc_thread_t lpcmdec_CreateThread (adec_config_t * p_config)
64 lpcmdec_thread_t * p_lpcmdec;
65 intf_DbgMsg ( "lpcm: creating lpcm decoder thread" );
67 /* Allocate the memory needed to store the thread's structure */
68 if ((p_lpcmdec = (lpcmdec_thread_t *)malloc (sizeof(lpcmdec_thread_t))) == NULL) {
69 intf_ErrMsg ( "lpcm error: cannot create lpcmdec_thread_t" );
74 * Initialize the thread properties
76 p_lpcmdec->p_config = p_config;
77 p_lpcmdec->p_fifo = p_config->decoder_config.p_decoder_fifo;
80 /* Initialize the lpcm decoder structures */
81 lpcm_init (&p_lpcmdec->lpcm_decoder);
84 * Initialize the output properties
86 p_lpcmdec->p_aout = p_config->p_aout;
87 p_lpcmdec->p_aout_fifo = NULL;
89 /* Spawn the lpcm decoder thread */
90 if (vlc_thread_create(&p_lpcmdec->thread_id, "lpcm decoder", (vlc_thread_func_t)RunThread, (void *)p_lpcmdec)) {
91 intf_ErrMsg ( "lpcm error: cannot spawn thread" );
96 intf_DbgMsg ( "LPCM Debug: lpcm decoder thread (%p) created", p_lpcmdec );
97 return p_lpcmdec->thread_id;
100 /* Following functions are local */
102 /*****************************************************************************
103 * InitThread : initialize an lpcm decoder thread
104 *****************************************************************************/
105 static int InitThread (lpcmdec_thread_t * p_lpcmdec)
107 aout_fifo_t aout_fifo;
108 lpcm_byte_stream_t * byte_stream;
110 intf_DbgMsg ( "LPCM Debug: initializing lpcm decoder thread %p", p_lpcmdec );
112 /* Our first job is to initialize the bit stream structure with the
113 * beginning of the input stream */
114 vlc_mutex_lock (&p_lpcmdec->p_fifo->data_lock);
115 while (DECODER_FIFO_ISEMPTY(*p_lpcmdec->p_fifo)) {
116 if (p_lpcmdec->p_fifo->b_die) {
117 vlc_mutex_unlock (&p_lpcmdec->p_fifo->data_lock);
120 vlc_cond_wait (&p_lpcmdec->p_fifo->data_wait, &p_lpcmdec->p_fifo->data_lock);
122 p_lpcmdec->p_data = DECODER_FIFO_START (*p_lpcmdec->p_fifo)->p_first;
123 byte_stream = lpcm_byte_stream (&p_lpcmdec->lpcm_decoder);
124 byte_stream->p_byte = p_lpcmdec->p_data->p_payload_start;
125 byte_stream->p_end = p_lpcmdec->p_data->p_payload_end;
126 byte_stream->info = p_lpcmdec;
127 vlc_mutex_unlock (&p_lpcmdec->p_fifo->data_lock);
129 aout_fifo.i_type = AOUT_ADEC_STEREO_FIFO;
130 aout_fifo.i_channels = 2;
131 aout_fifo.b_stereo = 1;
133 aout_fifo.l_frame_size = LPCMDEC_FRAME_SIZE;
135 /* Creating the audio output fifo */
136 if ((p_lpcmdec->p_aout_fifo = aout_CreateFifo(p_lpcmdec->p_aout, &aout_fifo)) == NULL) {
140 intf_DbgMsg ( "LPCM Debug: lpcm decoder thread %p initialized", p_lpcmdec );
144 /*****************************************************************************
145 * RunThread : lpcm decoder thread
146 *****************************************************************************/
147 static void RunThread (lpcmdec_thread_t * p_lpcmdec)
151 intf_DbgMsg( "LPCM Debug: running lpcm decoder thread (%p) (pid== %i)", p_lpcmdec, getpid() );
153 /* Fucking holy piece of shit ! */
154 //msleep (INPUT_PTS_DELAY);
156 /* Initializing the lpcm decoder thread */
157 if (InitThread (p_lpcmdec))
159 p_lpcmdec->p_fifo->b_error = 1;
163 p_lpcmdec->sync_ptr = 0;
165 /* lpcm decoder thread's main loop */
166 /* FIXME : do we have enough room to store the decoded frames ?? */
168 while ((!p_lpcmdec->p_fifo->b_die) && (!p_lpcmdec->p_fifo->b_error))
171 lpcm_sync_info_t sync_info;
175 /* have to find a synchro point */
178 if (DECODER_FIFO_START(*p_lpcmdec->p_fifo)->i_pts)
180 p_lpcmdec->p_aout_fifo->date[p_lpcmdec->p_aout_fifo->l_end_frame] = DECODER_FIFO_START(*p_lpcmdec->p_fifo)->i_pts;
181 DECODER_FIFO_START(*p_lpcmdec->p_fifo)->i_pts = 0;
185 p_lpcmdec->p_aout_fifo->date[p_lpcmdec->p_aout_fifo->l_end_frame] = LAST_MDATE;
188 p_lpcmdec->p_aout_fifo->l_rate = sync_info.sample_rate;
190 buffer = ((s16 *)p_lpcmdec->p_aout_fifo->buffer) + (p_lpcmdec->p_aout_fifo->l_end_frame * LPCMDEC_FRAME_SIZE);
192 if (lpcm_decode_frame (&p_lpcmdec->lpcm_decoder, buffer))
198 vlc_mutex_lock (&p_lpcmdec->p_aout_fifo->data_lock);
199 p_lpcmdec->p_aout_fifo->l_end_frame = (p_lpcmdec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
200 vlc_cond_signal (&p_lpcmdec->p_aout_fifo->data_wait);
201 vlc_mutex_unlock (&p_lpcmdec->p_aout_fifo->data_lock);
203 intf_DbgMsg( "LPCM Debug: %x", *buffer );
207 /* If b_error is set, the lpcm decoder thread enters the error loop */
208 if (p_lpcmdec->p_fifo->b_error)
210 ErrorThread (p_lpcmdec);
213 /* End of the lpcm decoder thread */
214 EndThread (p_lpcmdec);
217 /*****************************************************************************
218 * ErrorThread : lpcm decoder's RunThread() error loop
219 *****************************************************************************/
220 static void ErrorThread (lpcmdec_thread_t * p_lpcmdec)
222 /* We take the lock, because we are going to read/write the start/end
223 * indexes of the decoder fifo */
224 vlc_mutex_lock (&p_lpcmdec->p_fifo->data_lock);
226 /* Wait until a `die' order is sent */
227 while (!p_lpcmdec->p_fifo->b_die) {
228 /* Trash all received PES packets */
229 while (!DECODER_FIFO_ISEMPTY(*p_lpcmdec->p_fifo)) {
230 p_lpcmdec->p_fifo->pf_delete_pes(p_lpcmdec->p_fifo->p_packets_mgt,
231 DECODER_FIFO_START(*p_lpcmdec->p_fifo));
232 DECODER_FIFO_INCSTART (*p_lpcmdec->p_fifo);
235 /* Waiting for the input thread to put new PES packets in the fifo */
236 vlc_cond_wait (&p_lpcmdec->p_fifo->data_wait, &p_lpcmdec->p_fifo->data_lock);
239 /* We can release the lock before leaving */
240 vlc_mutex_unlock (&p_lpcmdec->p_fifo->data_lock);
243 /*****************************************************************************
244 * EndThread : lpcm decoder thread destruction
245 *****************************************************************************/
246 static void EndThread (lpcmdec_thread_t * p_lpcmdec)
248 intf_DbgMsg( "LPCM Debug: destroying lpcm decoder thread %p", p_lpcmdec );
250 /* If the audio output fifo was created, we destroy it */
251 if (p_lpcmdec->p_aout_fifo != NULL) {
252 aout_DestroyFifo (p_lpcmdec->p_aout_fifo);
254 /* Make sure the output thread leaves the NextFrame() function */
255 vlc_mutex_lock (&(p_lpcmdec->p_aout_fifo->data_lock));
256 vlc_cond_signal (&(p_lpcmdec->p_aout_fifo->data_wait));
257 vlc_mutex_unlock (&(p_lpcmdec->p_aout_fifo->data_lock));
260 /* Destroy descriptor */
263 intf_DbgMsg( "LPCM Debug: lpcm decoder thread %p destroyed", p_lpcmdec );
266 void lpcm_byte_stream_next (lpcm_byte_stream_t * p_byte_stream)
268 // lpcmdec_thread_t * p_lpcmdec = p_byte_stream->info;
270 /* We are looking for the next TS packet that contains real data,
271 * and not just a PES header */