* ac3_decoder_thread.c: ac3 decoder thread
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
+ * $Id: ac3_decoder_thread.c,v 1.31 2001/05/01 04:18:18 sam Exp $
*
- * Authors:
+ * Authors: Michel Lespinasse <walken@zoy.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <stdio.h> /* "intf_msg.h" */
#include <stdlib.h> /* malloc(), free() */
-#include <sys/types.h> /* on BSD, uio.h needs types.h */
-#include <sys/uio.h> /* "input.h" */
#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
-#include "plugins.h"
-#include "debug.h" /* "input_netlist.h" */
#include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
static void RunThread (ac3dec_thread_t * p_adec);
static void ErrorThread (ac3dec_thread_t * p_adec);
static void EndThread (ac3dec_thread_t * p_adec);
+static void BitstreamCallback ( bit_stream_t *p_bit_stream,
+ boolean_t b_new_pes );
+
/*****************************************************************************
* ac3dec_CreateThread: creates an ac3 decoder thread
*****************************************************************************/
vlc_thread_t ac3dec_CreateThread( adec_config_t * p_config )
{
- ac3dec_thread_t * p_ac3dec;
+ ac3dec_thread_t * p_ac3dec_t;
- intf_DbgMsg( "ac3dec debug: creating ac3 decoder thread\n" );
+ intf_DbgMsg( "ac3dec debug: creating ac3 decoder thread" );
/* Allocate the memory needed to store the thread's structure */
- if ((p_ac3dec = (ac3dec_thread_t *)malloc (sizeof(ac3dec_thread_t))) == NULL)
+ if((p_ac3dec_t = (ac3dec_thread_t *)malloc(sizeof(ac3dec_thread_t)))==NULL)
{
intf_ErrMsg ( "ac3dec error: not enough memory "
- "for ac3dec_CreateThread() to create the new thread\n");
+ "for ac3dec_CreateThread() to create the new thread");
return 0;
}
-
+
/*
* Initialize the thread properties
*/
- p_ac3dec->b_die = 0;
- p_ac3dec->b_error = 0;
- p_ac3dec->p_config = p_config;
- p_ac3dec->p_fifo = p_config->decoder_config.p_decoder_fifo;
+ p_ac3dec_t->p_config = p_config;
+ p_ac3dec_t->p_fifo = p_config->decoder_config.p_decoder_fifo;
/* Initialize the ac3 decoder structures */
- ac3_init (&p_ac3dec->ac3_decoder);
+ ac3_init (&p_ac3dec_t->ac3_decoder);
/*
* Initialize the output properties
*/
- p_ac3dec->p_aout = p_config->p_aout;
- p_ac3dec->p_aout_fifo = NULL;
+ p_ac3dec_t->p_aout_fifo = NULL;
/* Spawn the ac3 decoder thread */
- if (vlc_thread_create(&p_ac3dec->thread_id, "ac3 decoder", (vlc_thread_func_t)RunThread, (void *)p_ac3dec))
+ if (vlc_thread_create(&p_ac3dec_t->thread_id, "ac3 decoder",
+ (vlc_thread_func_t)RunThread, (void *)p_ac3dec_t))
{
- intf_ErrMsg( "ac3dec error: can't spawn ac3 decoder thread\n" );
- free (p_ac3dec);
+ intf_ErrMsg( "ac3dec error: can't spawn ac3 decoder thread" );
+ free (p_ac3dec_t);
return 0;
}
- intf_DbgMsg ("ac3dec debug: ac3 decoder thread (%p) created\n", p_ac3dec);
- return p_ac3dec->thread_id;
+ intf_DbgMsg ("ac3dec debug: ac3 decoder thread (%p) created", p_ac3dec_t);
+ return p_ac3dec_t->thread_id;
}
/* Following functions are local */
/*****************************************************************************
* InitThread : initialize an ac3 decoder thread
*****************************************************************************/
-static int InitThread (ac3dec_thread_t * p_ac3dec)
+static int InitThread (ac3dec_thread_t * p_ac3dec_t)
{
- aout_fifo_t aout_fifo;
- ac3_byte_stream_t * byte_stream;
-
- intf_DbgMsg ("ac3dec debug: initializing ac3 decoder thread %p\n", p_ac3dec);
-
- /* Get the first data packet. */
- vlc_mutex_lock( &p_ac3dec->p_fifo->data_lock );
- while ( DECODER_FIFO_ISEMPTY( *p_ac3dec->p_fifo ) )
- {
- if ( p_ac3dec->p_fifo->b_die )
- {
- vlc_mutex_unlock( &p_ac3dec->p_fifo->data_lock );
- return -1;
- }
- vlc_cond_wait( &p_ac3dec->p_fifo->data_wait, &p_ac3dec->p_fifo->data_lock );
- }
- p_ac3dec->p_data = DECODER_FIFO_START(*p_ac3dec->p_fifo)->p_first;
- byte_stream = ac3_byte_stream (&p_ac3dec->ac3_decoder);
- byte_stream->p_byte = p_ac3dec->p_data->p_payload_start;
- byte_stream->p_end = p_ac3dec->p_data->p_payload_end;
- byte_stream->info = p_ac3dec;
- vlc_mutex_unlock (&p_ac3dec->p_fifo->data_lock);
-
- aout_fifo.i_type = AOUT_ADEC_STEREO_FIFO;
- aout_fifo.i_channels = 2;
- aout_fifo.b_stereo = 1;
+ intf_DbgMsg("ac3dec debug: initializing ac3 decoder thread %p",p_ac3dec_t);
- aout_fifo.l_frame_size = AC3DEC_FRAME_SIZE;
+ p_ac3dec_t->p_config->decoder_config.pf_init_bit_stream(
+ &p_ac3dec_t->ac3_decoder.bit_stream,
+ p_ac3dec_t->p_config->decoder_config.p_decoder_fifo,
+ BitstreamCallback, (void *) p_ac3dec_t );
/* Creating the audio output fifo */
- if ((p_ac3dec->p_aout_fifo = aout_CreateFifo(p_ac3dec->p_aout, &aout_fifo)) == NULL)
+ p_ac3dec_t->p_aout_fifo = aout_CreateFifo( AOUT_ADEC_STEREO_FIFO, 2, 0, 0,
+ AC3DEC_FRAME_SIZE, NULL );
+ if ( p_ac3dec_t->p_aout_fifo == NULL )
{
return -1;
}
- intf_DbgMsg ("ac3dec debug: ac3 decoder thread %p initialized\n", p_ac3dec);
+ intf_DbgMsg("ac3dec debug: ac3 decoder thread %p initialized", p_ac3dec_t);
return 0;
}
/*****************************************************************************
* RunThread : ac3 decoder thread
*****************************************************************************/
-static void RunThread (ac3dec_thread_t * p_ac3dec)
+static void RunThread (ac3dec_thread_t * p_ac3dec_t)
{
int sync;
- intf_DbgMsg ("ac3dec debug: running ac3 decoder thread (%p) (pid == %i)\n", p_ac3dec, getpid());
-
- /* FIXME ! Qu'est-ce que c'est que ce bordel !?!?!?!? --Meuuh */
- //msleep (INPUT_PTS_DELAY);
+ intf_DbgMsg ("ac3dec debug: running ac3 decoder thread (%p) (pid == %i)", p_ac3dec_t, getpid());
/* Initializing the ac3 decoder thread */
- if (InitThread (p_ac3dec)) /* XXX?? */
+ if (InitThread (p_ac3dec_t)) /* XXX?? */
{
- p_ac3dec->b_error = 1;
+ p_ac3dec_t->p_fifo->b_error = 1;
}
sync = 0;
- p_ac3dec->sync_ptr = 0;
+ p_ac3dec_t->sync_ptr = 0;
/* ac3 decoder thread's main loop */
/* FIXME : do we have enough room to store the decoded frames ?? */
- while ((!p_ac3dec->b_die) && (!p_ac3dec->b_error))
+ while ((!p_ac3dec_t->p_fifo->b_die) && (!p_ac3dec_t->p_fifo->b_error))
{
s16 * buffer;
ac3_sync_info_t sync_info;
-
- if (!sync) { /* have to find a synchro point */
- int ptr;
- ac3_byte_stream_t * p_byte_stream;
-
- intf_DbgMsg ("ac3dec: sync\n");
-
- p_byte_stream = ac3_byte_stream (&p_ac3dec->ac3_decoder);
-
- /* first read till next ac3 magic header */
- do
- {
- ac3_byte_stream_next (p_byte_stream);
- } while ((!p_ac3dec->sync_ptr) &&
- (!p_ac3dec->b_die) &&
- (!p_ac3dec->b_error));
- /* skip the specified number of bytes */
-
- if( p_ac3dec->b_die || p_ac3dec->b_error )
- {
- goto bad_frame;
- }
-
- ptr = p_ac3dec->sync_ptr;
- while (--ptr && (!p_ac3dec->b_die) && (!p_ac3dec->b_error))
- {
- if (p_byte_stream->p_byte >= p_byte_stream->p_end)
- {
- ac3_byte_stream_next (p_byte_stream);
- }
- p_byte_stream->p_byte++;
- }
-
- if( p_ac3dec->b_die || p_ac3dec->b_error )
+ int ptr;
+
+ if (!sync) {
+ do {
+ GetBits(&p_ac3dec_t->ac3_decoder.bit_stream,8);
+ } while ((!p_ac3dec_t->sync_ptr) && (!p_ac3dec_t->p_fifo->b_die)
+ && (!p_ac3dec_t->p_fifo->b_error));
+
+ ptr = p_ac3dec_t->sync_ptr;
+
+ while(ptr-- && (!p_ac3dec_t->p_fifo->b_die)
+ && (!p_ac3dec_t->p_fifo->b_error))
{
- goto bad_frame;
+ p_ac3dec_t->ac3_decoder.bit_stream.p_byte++;
}
-
+
/* we are in sync now */
sync = 1;
- p_ac3dec->sync_ptr = 0;
}
- if (DECODER_FIFO_START(*p_ac3dec->p_fifo)->b_has_pts)
- {
- p_ac3dec->p_aout_fifo->date[p_ac3dec->p_aout_fifo->l_end_frame] = DECODER_FIFO_START(*p_ac3dec->p_fifo)->i_pts;
- DECODER_FIFO_START(*p_ac3dec->p_fifo)->b_has_pts = 0;
- }
- else
+ if (DECODER_FIFO_START(*p_ac3dec_t->p_fifo)->i_pts)
{
- p_ac3dec->p_aout_fifo->date[p_ac3dec->p_aout_fifo->l_end_frame] = LAST_MDATE;
+ p_ac3dec_t->p_aout_fifo->date[p_ac3dec_t->p_aout_fifo->l_end_frame] =
+ DECODER_FIFO_START(*p_ac3dec_t->p_fifo)->i_pts;
+ DECODER_FIFO_START(*p_ac3dec_t->p_fifo)->i_pts = 0;
+ } else {
+ p_ac3dec_t->p_aout_fifo->date[p_ac3dec_t->p_aout_fifo->l_end_frame] =
+ LAST_MDATE;
}
-
- if (ac3_sync_frame (&p_ac3dec->ac3_decoder, &sync_info))
+
+ if (ac3_sync_frame (&p_ac3dec_t->ac3_decoder, &sync_info))
{
sync = 0;
goto bad_frame;
}
- p_ac3dec->p_aout_fifo->l_rate = sync_info.sample_rate;
+ p_ac3dec_t->p_aout_fifo->l_rate = sync_info.sample_rate;
- buffer = ((s16 *)p_ac3dec->p_aout_fifo->buffer) + (p_ac3dec->p_aout_fifo->l_end_frame * AC3DEC_FRAME_SIZE);
+ buffer = ((s16 *)p_ac3dec_t->p_aout_fifo->buffer) +
+ (p_ac3dec_t->p_aout_fifo->l_end_frame * AC3DEC_FRAME_SIZE);
- if (ac3_decode_frame (&p_ac3dec->ac3_decoder, buffer))
+ if (ac3_decode_frame (&p_ac3dec_t->ac3_decoder, buffer))
{
sync = 0;
goto bad_frame;
}
-
- vlc_mutex_lock (&p_ac3dec->p_aout_fifo->data_lock);
- p_ac3dec->p_aout_fifo->l_end_frame = (p_ac3dec->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
- vlc_cond_signal (&p_ac3dec->p_aout_fifo->data_wait);
- vlc_mutex_unlock (&p_ac3dec->p_aout_fifo->data_lock);
-
- bad_frame:
+
+ vlc_mutex_lock (&p_ac3dec_t->p_aout_fifo->data_lock);
+ p_ac3dec_t->p_aout_fifo->l_end_frame =
+ (p_ac3dec_t->p_aout_fifo->l_end_frame + 1) & AOUT_FIFO_SIZE;
+ vlc_cond_signal (&p_ac3dec_t->p_aout_fifo->data_wait);
+ vlc_mutex_unlock (&p_ac3dec_t->p_aout_fifo->data_lock);
+
+ bad_frame:
+ RealignBits(&p_ac3dec_t->ac3_decoder.bit_stream);
}
/* If b_error is set, the ac3 decoder thread enters the error loop */
- if (p_ac3dec->b_error)
+ if (p_ac3dec_t->p_fifo->b_error)
{
- ErrorThread (p_ac3dec);
+ ErrorThread (p_ac3dec_t);
}
/* End of the ac3 decoder thread */
- EndThread (p_ac3dec);
+ EndThread (p_ac3dec_t);
}
/*****************************************************************************
* ErrorThread : ac3 decoder's RunThread() error loop
*****************************************************************************/
-static void ErrorThread (ac3dec_thread_t * p_ac3dec)
+static void ErrorThread (ac3dec_thread_t * p_ac3dec_t)
{
/* We take the lock, because we are going to read/write the start/end
* indexes of the decoder fifo */
- vlc_mutex_lock (&p_ac3dec->p_fifo->data_lock);
+ vlc_mutex_lock (&p_ac3dec_t->p_fifo->data_lock);
/* Wait until a `die' order is sent */
- while (!p_ac3dec->b_die)
+ while (!p_ac3dec_t->p_fifo->b_die)
{
/* Trash all received PES packets */
- while (!DECODER_FIFO_ISEMPTY(*p_ac3dec->p_fifo))
+ while (!DECODER_FIFO_ISEMPTY(*p_ac3dec_t->p_fifo))
{
- p_ac3dec->p_fifo->pf_delete_pes(p_ac3dec->p_fifo->p_packets_mgt,
- DECODER_FIFO_START(*p_ac3dec->p_fifo));
- DECODER_FIFO_INCSTART (*p_ac3dec->p_fifo);
+ p_ac3dec_t->p_fifo->pf_delete_pes(p_ac3dec_t->p_fifo->p_packets_mgt,
+ DECODER_FIFO_START(*p_ac3dec_t->p_fifo));
+ DECODER_FIFO_INCSTART (*p_ac3dec_t->p_fifo);
}
/* Waiting for the input thread to put new PES packets in the fifo */
- vlc_cond_wait (&p_ac3dec->p_fifo->data_wait,
- &p_ac3dec->p_fifo->data_lock);
+ vlc_cond_wait (&p_ac3dec_t->p_fifo->data_wait,
+ &p_ac3dec_t->p_fifo->data_lock);
}
/* We can release the lock before leaving */
- vlc_mutex_unlock (&p_ac3dec->p_fifo->data_lock);
+ vlc_mutex_unlock (&p_ac3dec_t->p_fifo->data_lock);
}
/*****************************************************************************
* EndThread : ac3 decoder thread destruction
*****************************************************************************/
-static void EndThread (ac3dec_thread_t * p_ac3dec)
+static void EndThread (ac3dec_thread_t * p_ac3dec_t)
{
- intf_DbgMsg ("ac3dec debug: destroying ac3 decoder thread %p\n", p_ac3dec);
+ intf_DbgMsg ("ac3dec debug: destroying ac3 decoder thread %p", p_ac3dec_t);
/* If the audio output fifo was created, we destroy it */
- if (p_ac3dec->p_aout_fifo != NULL)
+ if (p_ac3dec_t->p_aout_fifo != NULL)
{
- aout_DestroyFifo (p_ac3dec->p_aout_fifo);
+ aout_DestroyFifo (p_ac3dec_t->p_aout_fifo);
/* Make sure the output thread leaves the NextFrame() function */
- vlc_mutex_lock (&(p_ac3dec->p_aout_fifo->data_lock));
- vlc_cond_signal (&(p_ac3dec->p_aout_fifo->data_wait));
- vlc_mutex_unlock (&(p_ac3dec->p_aout_fifo->data_lock));
+ vlc_mutex_lock (&(p_ac3dec_t->p_aout_fifo->data_lock));
+ vlc_cond_signal (&(p_ac3dec_t->p_aout_fifo->data_wait));
+ vlc_mutex_unlock (&(p_ac3dec_t->p_aout_fifo->data_lock));
+
}
/* Destroy descriptor */
- free (p_ac3dec);
+ free( p_ac3dec_t->p_config );
+ free( p_ac3dec_t );
- intf_DbgMsg ("ac3dec debug: ac3 decoder thread %p destroyed\n", p_ac3dec);
+ intf_DbgMsg ("ac3dec debug: ac3 decoder thread %p destroyed", p_ac3dec_t);
}
-void ac3_byte_stream_next (ac3_byte_stream_t * p_byte_stream)
+/*****************************************************************************
+* BitstreamCallback: Import parameters from the new data/PES packet
+*****************************************************************************
+* This function is called by input's NextDataPacket.
+*****************************************************************************/
+static void BitstreamCallback ( bit_stream_t * p_bit_stream,
+ boolean_t b_new_pes)
{
- ac3dec_thread_t * p_ac3dec = p_byte_stream->info;
-
- /* We are looking for the next TS packet that contains real data,
- * and not just a PES header */
- do
- {
- /* We were reading the last TS packet of this PES packet... It's
- * time to jump to the next PES packet */
- if (p_ac3dec->p_data->p_next == NULL)
- {
- int ptr;
-
- /* We are going to read/write the start and end indexes of the
- * decoder fifo and to use the fifo's conditional variable,
- * that's why we need to take the lock before */
- vlc_mutex_lock (&p_ac3dec->p_fifo->data_lock);
-
- /* Is the input thread dying ? */
- if (p_ac3dec->p_fifo->b_die)
- {
- vlc_mutex_unlock (&p_ac3dec->p_fifo->data_lock);
- return;
- }
- /* We should increase the start index of the decoder fifo, but
- * if we do this now, the input thread could overwrite the
- * pointer to the current PES packet, and we weren't able to
- * give it back to the netlist. That's why we free the PES
- * packet first. */
- p_ac3dec->p_fifo->pf_delete_pes(p_ac3dec->p_fifo->p_packets_mgt,
- DECODER_FIFO_START(*p_ac3dec->p_fifo));
+ ac3dec_thread_t *p_ac3dec_t=(ac3dec_thread_t *)p_bit_stream->p_callback_arg;
- DECODER_FIFO_INCSTART (*p_ac3dec->p_fifo);
-
- while (DECODER_FIFO_ISEMPTY(*p_ac3dec->p_fifo))
- {
- vlc_cond_wait(&p_ac3dec->p_fifo->data_wait, &p_ac3dec->p_fifo->data_lock);
-
- if (p_ac3dec->p_fifo->b_die)
- {
- vlc_mutex_unlock (&p_ac3dec->p_fifo->data_lock);
- return;
- }
- }
-
- /* The next byte could be found in the next PES packet */
- p_ac3dec->p_data = DECODER_FIFO_START(*p_ac3dec->p_fifo)->p_first;
-
- /* parse ac3 magic header */
- ptr = *(p_ac3dec->p_data->p_payload_start + 1);
- ptr <<= 8;
- ptr |= *(p_ac3dec->p_data->p_payload_start + 2);
- p_ac3dec->sync_ptr = ptr;
- p_ac3dec->p_data->p_payload_start += 3;
-
- /* We can release the fifo's data lock */
- vlc_mutex_unlock (&p_ac3dec->p_fifo->data_lock);
- }
- /* Perhaps the next TS packet of the current PES packet contains
- * real data (ie its payload's size is greater than 0) */
- else
- {
- p_ac3dec->p_data = p_ac3dec->p_data->p_next;
- }
- } while (p_ac3dec->p_data->p_payload_start == p_ac3dec->p_data->p_payload_end);
- p_byte_stream->p_byte = p_ac3dec->p_data->p_payload_start;
- p_byte_stream->p_end = p_ac3dec->p_data->p_payload_end;
+ if( b_new_pes )
+ {
+ int ptr;
+
+ ptr = *(p_bit_stream->p_byte + 1);
+ ptr <<= 8;
+ ptr |= *(p_bit_stream->p_byte + 2);
+ p_ac3dec_t->sync_ptr = ptr;
+ p_bit_stream->p_byte += 3;
+ }
}
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