1 /*****************************************************************************
2 * lpcm_decoder_thread.c: lpcm decoder thread
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: lpcm_decoder_thread.c,v 1.13 2001/04/06 09:15:48 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 <string.h> /* memcpy(), memset() */
33 #include <stdlib.h> /* malloc(), free() */
40 #include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
42 #include "stream_control.h"
43 #include "input_ext-dec.h"
45 #include "audio_output.h"
47 #include "lpcm_decoder.h"
48 #include "lpcm_decoder_thread.h"
50 #define LPCMDEC_FRAME_SIZE (2*1536) /* May be useless */
52 /*****************************************************************************
54 *****************************************************************************/
55 static int InitThread (lpcmdec_thread_t * p_adec);
56 static void RunThread (lpcmdec_thread_t * p_adec);
57 static void ErrorThread (lpcmdec_thread_t * p_adec);
58 static void EndThread (lpcmdec_thread_t * p_adec);
60 /*****************************************************************************
61 * lpcmdec_CreateThread: creates an lpcm decoder thread
62 *****************************************************************************/
63 vlc_thread_t lpcmdec_CreateThread (adec_config_t * p_config)
65 lpcmdec_thread_t * p_lpcmdec;
66 intf_DbgMsg ( "lpcm: creating lpcm decoder thread" );
68 /* Allocate the memory needed to store the thread's structure */
69 if ((p_lpcmdec = (lpcmdec_thread_t *)malloc (sizeof(lpcmdec_thread_t))) == NULL) {
70 intf_ErrMsg ( "lpcm error: cannot create lpcmdec_thread_t" );
75 * Initialize the thread properties
77 p_lpcmdec->p_config = p_config;
78 p_lpcmdec->p_fifo = p_config->decoder_config.p_decoder_fifo;
81 /* Initialize the lpcm decoder structures */
82 lpcm_init (&p_lpcmdec->lpcm_decoder);
85 * Initialize the output properties
87 p_lpcmdec->p_aout = p_config->p_aout;
88 p_lpcmdec->p_aout_fifo = NULL;
90 /* Spawn the lpcm decoder thread */
91 if (vlc_thread_create(&p_lpcmdec->thread_id, "lpcm decoder", (vlc_thread_func_t)RunThread, (void *)p_lpcmdec)) {
92 intf_ErrMsg ( "lpcm error: cannot spawn thread" );
97 intf_DbgMsg ( "LPCM Debug: lpcm decoder thread (%p) created", p_lpcmdec );
98 return p_lpcmdec->thread_id;
101 /* Following functions are local */
103 /*****************************************************************************
104 * InitThread : initialize an lpcm decoder thread
105 *****************************************************************************/
106 static int InitThread (lpcmdec_thread_t * p_lpcmdec)
108 aout_fifo_t aout_fifo;
109 lpcm_byte_stream_t * byte_stream;
111 intf_DbgMsg ( "LPCM Debug: initializing lpcm decoder thread %p", p_lpcmdec );
113 /* Our first job is to initialize the bit stream structure with the
114 * beginning of the input stream */
115 vlc_mutex_lock (&p_lpcmdec->p_fifo->data_lock);
116 while (DECODER_FIFO_ISEMPTY(*p_lpcmdec->p_fifo)) {
117 if (p_lpcmdec->p_fifo->b_die) {
118 vlc_mutex_unlock (&p_lpcmdec->p_fifo->data_lock);
121 vlc_cond_wait (&p_lpcmdec->p_fifo->data_wait, &p_lpcmdec->p_fifo->data_lock);
123 p_lpcmdec->p_data = DECODER_FIFO_START (*p_lpcmdec->p_fifo)->p_first;
124 byte_stream = lpcm_byte_stream (&p_lpcmdec->lpcm_decoder);
125 byte_stream->p_byte = p_lpcmdec->p_data->p_payload_start;
126 byte_stream->p_end = p_lpcmdec->p_data->p_payload_end;
127 byte_stream->info = p_lpcmdec;
128 vlc_mutex_unlock (&p_lpcmdec->p_fifo->data_lock);
130 aout_fifo.i_type = AOUT_ADEC_STEREO_FIFO;
131 aout_fifo.i_channels = 2;
132 aout_fifo.b_stereo = 1;
134 aout_fifo.l_frame_size = LPCMDEC_FRAME_SIZE;
136 /* Creating the audio output fifo */
137 if ((p_lpcmdec->p_aout_fifo = aout_CreateFifo(p_lpcmdec->p_aout, &aout_fifo)) == NULL) {
141 intf_DbgMsg ( "LPCM Debug: lpcm decoder thread %p initialized", p_lpcmdec );
145 /*****************************************************************************
146 * RunThread : lpcm decoder thread
147 *****************************************************************************/
148 static void RunThread (lpcmdec_thread_t * p_lpcmdec)
152 intf_DbgMsg( "LPCM Debug: running lpcm decoder thread (%p) (pid== %i)", p_lpcmdec, getpid() );
154 /* Fucking holy piece of shit ! */
155 //msleep (INPUT_PTS_DELAY);
157 /* Initializing the lpcm decoder thread */
158 if (InitThread (p_lpcmdec))
160 p_lpcmdec->p_fifo->b_error = 1;
164 p_lpcmdec->sync_ptr = 0;
166 /* lpcm decoder thread's main loop */
167 /* FIXME : do we have enough room to store the decoded frames ?? */
169 while ((!p_lpcmdec->p_fifo->b_die) && (!p_lpcmdec->p_fifo->b_error))
172 lpcm_sync_info_t sync_info;
176 /* have to find a synchro point */
179 if (DECODER_FIFO_START(*p_lpcmdec->p_fifo)->i_pts)
181 p_lpcmdec->p_aout_fifo->date[p_lpcmdec->p_aout_fifo->l_end_frame] = DECODER_FIFO_START(*p_lpcmdec->p_fifo)->i_pts;
182 DECODER_FIFO_START(*p_lpcmdec->p_fifo)->i_pts = 0;
186 p_lpcmdec->p_aout_fifo->date[p_lpcmdec->p_aout_fifo->l_end_frame] = LAST_MDATE;
189 p_lpcmdec->p_aout_fifo->l_rate = sync_info.sample_rate;
191 buffer = ((s16 *)p_lpcmdec->p_aout_fifo->buffer) + (p_lpcmdec->p_aout_fifo->l_end_frame * LPCMDEC_FRAME_SIZE);
193 if (lpcm_decode_frame (&p_lpcmdec->lpcm_decoder, buffer))
199 vlc_mutex_lock (&p_lpcmdec->p_aout_fifo->data_lock);
200 p_lpcmdec->p_aout_fifo->l_end_frame = (p_lpcmdec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
201 vlc_cond_signal (&p_lpcmdec->p_aout_fifo->data_wait);
202 vlc_mutex_unlock (&p_lpcmdec->p_aout_fifo->data_lock);
204 intf_DbgMsg( "LPCM Debug: %x", *buffer );
210 /* If b_error is set, the lpcm decoder thread enters the error loop */
211 if (p_lpcmdec->p_fifo->b_error)
213 ErrorThread (p_lpcmdec);
216 /* End of the lpcm decoder thread */
217 EndThread (p_lpcmdec);
220 /*****************************************************************************
221 * ErrorThread : lpcm decoder's RunThread() error loop
222 *****************************************************************************/
223 static void ErrorThread (lpcmdec_thread_t * p_lpcmdec)
225 /* We take the lock, because we are going to read/write the start/end
226 * indexes of the decoder fifo */
227 vlc_mutex_lock (&p_lpcmdec->p_fifo->data_lock);
229 /* Wait until a `die' order is sent */
230 while (!p_lpcmdec->p_fifo->b_die) {
231 /* Trash all received PES packets */
232 while (!DECODER_FIFO_ISEMPTY(*p_lpcmdec->p_fifo)) {
233 p_lpcmdec->p_fifo->pf_delete_pes(p_lpcmdec->p_fifo->p_packets_mgt,
234 DECODER_FIFO_START(*p_lpcmdec->p_fifo));
235 DECODER_FIFO_INCSTART (*p_lpcmdec->p_fifo);
238 /* Waiting for the input thread to put new PES packets in the fifo */
239 vlc_cond_wait (&p_lpcmdec->p_fifo->data_wait, &p_lpcmdec->p_fifo->data_lock);
242 /* We can release the lock before leaving */
243 vlc_mutex_unlock (&p_lpcmdec->p_fifo->data_lock);
246 /*****************************************************************************
247 * EndThread : lpcm decoder thread destruction
248 *****************************************************************************/
249 static void EndThread (lpcmdec_thread_t * p_lpcmdec)
251 intf_DbgMsg( "LPCM Debug: destroying lpcm decoder thread %p", p_lpcmdec );
253 /* If the audio output fifo was created, we destroy it */
254 if (p_lpcmdec->p_aout_fifo != NULL) {
255 aout_DestroyFifo (p_lpcmdec->p_aout_fifo);
257 /* Make sure the output thread leaves the NextFrame() function */
258 vlc_mutex_lock (&(p_lpcmdec->p_aout_fifo->data_lock));
259 vlc_cond_signal (&(p_lpcmdec->p_aout_fifo->data_wait));
260 vlc_mutex_unlock (&(p_lpcmdec->p_aout_fifo->data_lock));
263 /* Destroy descriptor */
266 intf_DbgMsg( "LPCM Debug: lpcm decoder thread %p destroyed", p_lpcmdec );
269 void lpcm_byte_stream_next (lpcm_byte_stream_t * p_byte_stream)
271 // lpcmdec_thread_t * p_lpcmdec = p_byte_stream->info;
273 /* We are looking for the next TS packet that contains real data,
274 * and not just a PES header */