* spu_decoder.c : spu decoder thread
*****************************************************************************
* Copyright (C) 2000 VideoLAN
- * $Id: spu_decoder.c,v 1.38 2001/04/28 03:36:25 sam Exp $
+ * $Id: spu_decoder.c,v 1.47 2001/06/02 01:09:03 sam Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
*****************************************************************************/
#include "defs.h"
+#ifdef HAVE_UNISTD_H
#include <unistd.h> /* getpid() */
+#endif
+
#ifdef WIN32 /* getpid() for win32 is located in process.h */
#include <process.h>
#endif
static int SyncPacket ( spudec_thread_t * );
static void ParsePacket ( spudec_thread_t * );
static int ParseControlSequences( spudec_thread_t *, subpicture_t * );
-static int ParseRLE ( u8 *, subpicture_t * );
+static int ParseRLE ( spudec_thread_t *, subpicture_t *, u8 * );
/*****************************************************************************
* spudec_CreateThread: create a spu decoder thread
* Initialize the thread properties
*/
p_spudec->p_config = p_config;
+
p_spudec->p_fifo = p_config->decoder_config.p_decoder_fifo;
- /* Get the video output informations */
- p_spudec->p_vout = p_config->p_vout;
+ /* Spawn a video output if there is none */
+ vlc_mutex_lock( &p_vout_bank->lock );
+
+ if( p_vout_bank->i_count == 0 )
+ {
+ intf_WarnMsg( 1, "spudec: no vout present, spawning one" );
+
+ p_spudec->p_vout = vout_CreateThread( NULL );
+
+ /* Everything failed */
+ if( p_spudec->p_vout == NULL )
+ {
+ intf_Msg( "spudec: can't open vout, aborting" );
+ vlc_mutex_unlock( &p_vout_bank->lock );
+ free( p_spudec );
+
+ return 0;
+ }
+
+ p_vout_bank->pp_vout[ p_vout_bank->i_count ] = p_spudec->p_vout;
+ p_vout_bank->i_count++;
+ }
+ else
+ {
+ /* Take the first video output FIXME: take the best one */
+ p_spudec->p_vout = p_vout_bank->pp_vout[ 0 ];
+ }
+
+ vlc_mutex_unlock( &p_vout_bank->lock );
/* Spawn the spu decoder thread */
if ( vlc_thread_create(&p_spudec->thread_id, "spu decoder",
{
intf_ErrMsg( "spudec error: can't spawn spu decoder thread" );
free( p_spudec );
- return( 0 );
+ return 0;
}
return( p_spudec->thread_id );
*****************************************************************************/
static void RunThread( spudec_thread_t *p_spudec )
{
- intf_WarnMsg( 1, "spudec: spu decoder thread %i spawned", getpid() );
+ intf_WarnMsg( 3, "spudec: spu decoder thread %i spawned", getpid() );
/*
* Initialize thread and free configuration
}
/* End of thread */
- intf_WarnMsg( 1, "spudec: destroying spu decoder thread %i", getpid() );
+ intf_WarnMsg( 3, "spudec: destroying spu decoder thread %i", getpid() );
EndThread( p_spudec );
}
p_spudec->i_rle_size = ShowBits( &p_spudec->bit_stream, 16 ) - 4;
/* If the values we got are a bit strange, skip packet */
- if( p_spudec->i_rle_size >= p_spudec->i_spu_size )
+ if( !p_spudec->i_spu_size
+ || ( p_spudec->i_rle_size >= p_spudec->i_spu_size ) )
{
return( 1 );
}
{
subpicture_t * p_spu;
u8 * p_src;
+ unsigned int i_offset;
+
+ intf_WarnMsg( 3, "spudec: trying to gather a 0x%.2x long subtitle",
+ p_spudec->i_spu_size );
/* We cannot display a subpicture with no date */
if( DECODER_FIFO_START(*p_spudec->p_fifo)->i_pts == 0 )
{
+ intf_WarnMsg( 3, "spudec error: subtitle without a date" );
return;
}
return;
}
- /* Get display time now. If we do it later, we may miss a PTS. */
- p_spu->begin_date = p_spu->end_date
- = DECODER_FIFO_START(*p_spudec->p_fifo)->i_pts;
+ /* Get display time now. If we do it later, we may miss the PTS. */
+ p_spudec->i_pts = DECODER_FIFO_START(*p_spudec->p_fifo)->i_pts;
/* Allocate the temporary buffer we will parse */
p_src = malloc( p_spudec->i_rle_size );
}
/* Get RLE data */
- GetChunk( &p_spudec->bit_stream, p_src, p_spudec->i_rle_size );
+ for( i_offset = 0;
+ i_offset + SPU_CHUNK_SIZE < p_spudec->i_rle_size;
+ i_offset += SPU_CHUNK_SIZE )
+ {
+ GetChunk( &p_spudec->bit_stream, p_src + i_offset, SPU_CHUNK_SIZE );
+
+ if( p_spudec->p_fifo->b_die )
+ {
+ free( p_src );
+ vout_DestroySubPicture( p_spudec->p_vout, p_spu );
+ return;
+ }
+ }
+
+ GetChunk( &p_spudec->bit_stream, p_src + i_offset,
+ p_spudec->i_rle_size - i_offset );
#if 0
/* Dump the subtitle info */
- intf_WarnHexDump( 0, p_spu->p_data, p_spudec->i_rle_size );
+ intf_WarnHexDump( 5, p_spu->p_data, p_spudec->i_rle_size );
#endif
/* Getting the control part */
- if( ParseControlSequences( p_spudec, p_spu ) )
+ if( p_spudec->p_fifo->b_die || ParseControlSequences( p_spudec, p_spu ) )
{
/* There was a parse error, delete the subpicture */
free( p_src );
return;
}
- if( ParseRLE( p_src, p_spu ) )
+ if( ParseRLE( p_spudec, p_spu, p_src ) )
{
/* There was a parse error, delete the subpicture */
free( p_src );
return;
}
- intf_WarnMsg( 1, "spudec: got a valid %ix%i subtitle at (%i,%i), "
- "RLE offsets: 0x%x 0x%x",
- p_spu->i_width, p_spu->i_height, p_spu->i_x, p_spu->i_y,
+ intf_WarnMsg( 3, "spudec: total size: 0x%x, RLE offsets: 0x%x 0x%x",
+ p_spudec->i_spu_size,
p_spu->type.spu.i_offset[0], p_spu->type.spu.i_offset[1] );
/* SPU is finished - we can ask the video output to display it */
int i_index = p_spudec->i_rle_size + 4;
/* The next start-of-control-sequence index and the previous one */
- int i_next_index = 0, i_prev_index;
+ int i_next_seq, i_cur_seq;
/* Command time and date */
u8 i_command;
int i_date;
+ /* XXX: temporary variables */
+ boolean_t b_force_display = 0;
+
+ /* Initialize the structure */
+ p_spu->i_start = p_spu->i_stop = 0;
+ p_spu->b_ephemer = 0;
+
do
{
/* Get the control sequence date */
i_date = GetBits( &p_spudec->bit_stream, 16 );
/* Next offset */
- i_prev_index = i_next_index;
- i_next_index = GetBits( &p_spudec->bit_stream, 16 );
+ i_cur_seq = i_index;
+ i_next_seq = GetBits( &p_spudec->bit_stream, 16 );
/* Skip what we just read */
i_index += 4;
switch( i_command )
{
case SPU_CMD_FORCE_DISPLAY:
-
+
/* 00 (force displaying) */
+ p_spu->i_start = p_spudec->i_pts + ( i_date * 11000 );
+ b_force_display = 1;
+
break;
/* Convert the dates in seconds to PTS values */
case SPU_CMD_START_DISPLAY:
/* 01 (start displaying) */
- p_spu->begin_date += ( i_date * 11000 );
+ p_spu->i_start = p_spudec->i_pts + ( i_date * 11000 );
break;
case SPU_CMD_STOP_DISPLAY:
/* 02 (stop displaying) */
- p_spu->end_date += ( i_date * 11000 );
+ p_spu->i_stop = p_spudec->i_pts + ( i_date * 11000 );
break;
} while( i_command != SPU_CMD_END );
- } while( i_index == i_next_index );
+ } while( i_index == i_next_seq );
- /* Check that the last index matches the previous one */
- if( i_next_index != i_prev_index )
+ /* Check that the next sequence index matches the current one */
+ if( i_next_seq != i_cur_seq )
{
intf_ErrMsg( "spudec error: index mismatch (0x%.4x != 0x%.4x)",
- i_next_index, i_prev_index );
+ i_next_seq, i_cur_seq );
return( 1 );
}
return( 1 );
}
+ if( !p_spu->i_start )
+ {
+ intf_ErrMsg( "spudec error: no `start display' command" );
+ }
+
+ if( !p_spu->i_stop )
+ {
+ /* This subtitle will live for 5 seconds or until the next subtitle */
+ p_spu->i_stop = p_spu->i_start + 500 * 11000;
+ p_spu->b_ephemer = 1;
+ }
+
/* Get rid of padding bytes */
switch( p_spudec->i_spu_size - i_index )
{
+ /* Zero or one padding byte, quite usual */
case 1:
-
RemoveBits( &p_spudec->bit_stream, 8 );
i_index++;
-
case 0:
-
- /* Zero or one padding byte, quite usual */
-
break;
+ /* More than one padding byte - this is very strange, but
+ * we can deal with it */
default:
-
- /* More than one padding byte - this is very strange, but
- * we can deal with it */
intf_WarnMsg( 2, "spudec warning: %i padding bytes, we usually "
"get 1 or none",
p_spudec->i_spu_size - i_index );
break;
}
+ if( b_force_display )
+ {
+ intf_ErrMsg( "spudec: \"force display\" command" );
+ intf_ErrMsg( "spudec: send mail to <sam@zoy.org> if you "
+ "want to help debugging this" );
+ }
+
/* Successfully parsed ! */
return( 0 );
}
* convenient structure for later decoding. For more information on the
* subtitles format, see http://sam.zoy.org/doc/dvd/subtitles/index.html
*****************************************************************************/
-static int ParseRLE( u8 *p_src, subpicture_t * p_spu )
+static int ParseRLE( spudec_thread_t *p_spudec,
+ subpicture_t * p_spu, u8 * p_src )
{
unsigned int i_code;
- unsigned int i_id = 0;
unsigned int i_width = p_spu->i_width;
unsigned int i_height = p_spu->i_height;
u16 *p_dest = (u16 *)p_spu->p_data;
/* The subtitles are interlaced, we need two offsets */
+ unsigned int i_id = 0; /* Start on the even SPU layer */
unsigned int pi_table[ 2 ];
unsigned int *pi_offset;
+ boolean_t b_empty_top = 1,
+ b_empty_bottom = 0;
+ unsigned int i_skipped_top = 0,
+ i_skipped_bottom = 0;
+
pi_table[ 0 ] = p_spu->type.spu.i_offset[ 0 ] << 1;
pi_table[ 1 ] = p_spu->type.spu.i_offset[ 1 ] << 1;
return( 1 );
}
- /* We got a valid code, store it */
- *p_dest++ = i_code;
+ if( i_code == (i_width << 2) ) /* FIXME: we assume 0 is transp */
+ {
+ if( b_empty_top )
+ {
+ /* This is a blank top line, we skip it */
+ i_skipped_top++;
+ }
+ else
+ {
+ /* We can't be sure the current lines will be skipped,
+ * so we store the code just in case. */
+ *p_dest++ = i_code;
+
+ b_empty_bottom = 1;
+ i_skipped_bottom++;
+ }
+ }
+ else
+ {
+ /* We got a valid code, store it */
+ *p_dest++ = i_code;
+
+ /* Valid code means no blank line */
+ b_empty_top = 0;
+ b_empty_bottom = 0;
+ i_skipped_bottom = 0;
+ }
}
/* Check that we didn't go too far */
i_id = ~i_id & 0x1;
}
- /* FIXME: we shouldn't need these padding bytes */
- while( i_y < i_height )
+ /* We shouldn't get any padding bytes */
+ if( i_y < i_height )
{
- *p_dest++ = i_width << 2;
- i_y++;
+ intf_ErrMsg( "spudec: padding bytes found in RLE sequence" );
+ intf_ErrMsg( "spudec: send mail to <sam@zoy.org> if you "
+ "want to help debugging this" );
+
+ /* Skip them just in case */
+ while( i_y < i_height )
+ {
+ *p_dest++ = i_width << 2;
+ i_y++;
+ }
+
+ return( 1 );
+ }
+
+ intf_WarnMsg( 3, "spudec: valid subtitle, size: %ix%i, position: %i,%i",
+ p_spu->i_width, p_spu->i_height, p_spu->i_x, p_spu->i_y );
+
+ /* Crop if necessary */
+ if( i_skipped_top || i_skipped_bottom )
+ {
+ p_spu->i_y += i_skipped_top;
+ p_spu->i_height -= i_skipped_top + i_skipped_bottom;
+
+ intf_WarnMsg( 3, "spudec: cropped to: %ix%i, position: %i,%i",
+ p_spu->i_width, p_spu->i_height, p_spu->i_x, p_spu->i_y );
}
return( 0 );
projects / vlc / blobdiff