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Commit ba97736a authored by Sam Hocevar's avatar Sam Hocevar
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* ./modules/codec/spudec/*: split spudec into the parsing and the rendering 

    functions.
  * ./modules/demux/mpeg/audio.c: at least three PS startcodes are required
    before we abort the parsing and consider the input as PS instead of MP3.
parent 647a105d
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modules/codec/spudec/Makefile
View file @ ba97736a
spudec_SOURCES = spudec.c
spudec_SOURCES = spudec.c parse.c render.c
modules/codec/spudec/parse.c 0 → 100644
View file @ ba97736a
/*****************************************************************************
* parse.c: SPU parser
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
* $Id: parse.c,v 1.1 2002/08/16 03:07:56 sam Exp $
*
* Authors: Samuel Hocevar <sam@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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* memcpy(), memset() */
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include <vlc/decoder.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* getpid() */
#endif
#ifdef WIN32 /* getpid() for win32 is located in process.h */
# include <process.h>
#endif
#include "spudec.h"
/*****************************************************************************
* Local prototypes.
*****************************************************************************/
static int ParseControlSequences( spudec_thread_t *, subpicture_t * );
static int ParseRLE ( spudec_thread_t *, subpicture_t *, u8 * );
/*****************************************************************************
* AddNibble: read a nibble from a source packet and add it to our integer.
*****************************************************************************/
static inline unsigned int AddNibble( unsigned int i_code,
u8 *p_src, int *pi_index )
{
if( *pi_index & 0x1 )
{
return( i_code << 4 | ( p_src[(*pi_index)++ >> 1] & 0xf ) );
}
else
{
return( i_code << 4 | p_src[(*pi_index)++ >> 1] >> 4 );
}
}
/*****************************************************************************
* SyncPacket: get in sync with the stream
*****************************************************************************
* This function makes a few sanity checks and returns 0 if it looks like we
* are at the beginning of a subpicture packet.
*****************************************************************************/
int E_(SyncPacket)( spudec_thread_t *p_spudec )
{
/* Re-align the buffer on an 8-bit boundary */
RealignBits( &p_spudec->bit_stream );
/* The total SPU packet size, often bigger than a PS packet */
p_spudec->i_spu_size = GetBits( &p_spudec->bit_stream, 16 );
/* The RLE stuff size (remove 4 because we just read 32 bits) */
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_spu_size
|| ( p_spudec->i_rle_size >= p_spudec->i_spu_size ) )
{
return( 1 );
}
RemoveBits( &p_spudec->bit_stream, 16 );
return( 0 );
}
/*****************************************************************************
* ParsePacket: parse an SPU packet and send it to the video output
*****************************************************************************
* This function parses the SPU packet and, if valid, sends it to the
* video output.
*****************************************************************************/
void E_(ParsePacket)( spudec_thread_t *p_spudec )
{
subpicture_t * p_spu;
u8 * p_src;
unsigned int i_offset;
msg_Dbg( p_spudec->p_fifo, "trying to gather a 0x%.2x long subtitle",
p_spudec->i_spu_size );
/* We cannot display a subpicture with no date */
if( p_spudec->p_fifo->p_first->i_pts == 0 )
{
msg_Warn( p_spudec->p_fifo, "subtitle without a date" );
return;
}
/* Allocate the subpicture internal data. */
p_spu = vout_CreateSubPicture( p_spudec->p_vout, MEMORY_SUBPICTURE,
sizeof( subpicture_sys_t )
+ p_spudec->i_rle_size * 4 );
/* Rationale for the "p_spudec->i_rle_size * 4": we are going to
* expand the RLE stuff so that we won't need to read nibbles later
* on. This will speed things up a lot. Plus, we'll only need to do
* this stupid interlacing stuff once. */
if( p_spu == NULL )
{
return;
}
/* Fill the p_spu structure */
p_spu->pf_render = E_(RenderSPU);
p_spu->p_sys->p_data = (u8*)p_spu->p_sys + sizeof( subpicture_sys_t );
p_spu->p_sys->b_palette = 0;
/* Get display time now. If we do it later, we may miss the PTS. */
p_spu->p_sys->i_pts = p_spudec->p_fifo->p_first->i_pts;
/* Allocate the temporary buffer we will parse */
p_src = malloc( p_spudec->i_rle_size );
if( p_src == NULL )
{
msg_Err( p_spudec->p_fifo, "out of memory" );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
/* Get RLE data */
for( i_offset = 0; i_offset < p_spudec->i_rle_size;
i_offset += SPU_CHUNK_SIZE )
{
GetChunk( &p_spudec->bit_stream, p_src + i_offset,
( i_offset + SPU_CHUNK_SIZE < p_spudec->i_rle_size ) ?
SPU_CHUNK_SIZE : p_spudec->i_rle_size - i_offset );
/* Abort subtitle parsing if we were requested to stop */
if( p_spudec->p_fifo->b_die )
{
free( p_src );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
}
#if 0
/* Dump the subtitle info */
intf_WarnHexDump( 5, p_spu->p_sys->p_data, p_spudec->i_rle_size );
#endif
/* Getting the control part */
if( ParseControlSequences( p_spudec, p_spu ) )
{
/* There was a parse error, delete the subpicture */
free( p_src );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
/* At this point, no more GetBit() command is needed, so we have all
* the data we need to tell whether the subtitle is valid. Thus we
* try to display it and we ignore b_die. */
if( ParseRLE( p_spudec, p_spu, p_src ) )
{
/* There was a parse error, delete the subpicture */
free( p_src );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
msg_Dbg( p_spudec->p_fifo, "total size: 0x%x, RLE offsets: 0x%x 0x%x",
p_spudec->i_spu_size,
p_spu->p_sys->pi_offset[0], p_spu->p_sys->pi_offset[1] );
/* SPU is finished - we can ask the video output to display it */
vout_DisplaySubPicture( p_spudec->p_vout, p_spu );
/* Clean up */
free( p_src );
}
/*****************************************************************************
* ParseControlSequences: parse all SPU control sequences
*****************************************************************************
* This is the most important part in SPU decoding. We get dates, palette
* information, coordinates, and so on. For more information on the
* subtitles format, see http://sam.zoy.org/doc/dvd/subtitles/index.html
*****************************************************************************/
static int ParseControlSequences( spudec_thread_t *p_spudec,
subpicture_t * p_spu )
{
/* Our current index in the SPU packet */
int i_index = p_spudec->i_rle_size + 4;
/* The next start-of-control-sequence index and the previous one */
int i_next_seq, i_cur_seq;
/* Command time and date */
u8 i_command;
int i_date;
int i, pi_alpha[4];
/* XXX: temporary variables */
vlc_bool_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_cur_seq = i_index;
i_next_seq = GetBits( &p_spudec->bit_stream, 16 );
/* Skip what we just read */
i_index += 4;
do
{
i_command = GetBits( &p_spudec->bit_stream, 8 );
i_index++;
switch( i_command )
{
case SPU_CMD_FORCE_DISPLAY:
/* 00 (force displaying) */
p_spu->i_start = p_spu->p_sys->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->i_start = p_spu->p_sys->i_pts + ( i_date * 11000 );
break;
case SPU_CMD_STOP_DISPLAY:
/* 02 (stop displaying) */
p_spu->i_stop = p_spu->p_sys->i_pts + ( i_date * 11000 );
break;
case SPU_CMD_SET_PALETTE:
/* 03xxxx (palette) */
if( p_spudec->p_fifo->p_demux_data &&
*(int*)p_spudec->p_fifo->p_demux_data == 0xBeeF )
{
u32 i_color;
p_spu->p_sys->b_palette = 1;
for( i = 0; i < 4 ; i++ )
{
i_color = ((u32*)((char*)p_spudec->p_fifo->
p_demux_data + sizeof(int)))[
GetBits(&p_spudec->bit_stream, 4) ];
/* FIXME: this job should be done sooner */
#ifndef WORDS_BIGENDIAN
p_spu->p_sys->pi_yuv[3-i][0] = (i_color>>16) & 0xff;
p_spu->p_sys->pi_yuv[3-i][1] = (i_color>>0) & 0xff;
p_spu->p_sys->pi_yuv[3-i][2] = (i_color>>8) & 0xff;
#else
p_spu->p_sys->pi_yuv[3-i][0] = (i_color>>8) & 0xff;
p_spu->p_sys->pi_yuv[3-i][1] = (i_color>>24) & 0xff;
p_spu->p_sys->pi_yuv[3-i][2] = (i_color>>16) & 0xff;
#endif
}
}
else
{
RemoveBits( &p_spudec->bit_stream, 16 );
}
i_index += 2;
break;
case SPU_CMD_SET_ALPHACHANNEL:
/* 04xxxx (alpha channel) */
pi_alpha[3] = GetBits( &p_spudec->bit_stream, 4 );
pi_alpha[2] = GetBits( &p_spudec->bit_stream, 4 );
pi_alpha[1] = GetBits( &p_spudec->bit_stream, 4 );
pi_alpha[0] = GetBits( &p_spudec->bit_stream, 4 );
/* Ignore blank alpha palette. Sometimes spurious blank
* alpha palettes are present - dunno why. */
if( pi_alpha[0] | pi_alpha[1] | pi_alpha[2] | pi_alpha[3] )
{
p_spu->p_sys->pi_alpha[0] = pi_alpha[0];
p_spu->p_sys->pi_alpha[1] = pi_alpha[1];
p_spu->p_sys->pi_alpha[2] = pi_alpha[2];
p_spu->p_sys->pi_alpha[3] = pi_alpha[3];
}
else
{
msg_Warn( p_spudec->p_fifo,
"ignoring blank alpha palette" );
}
i_index += 2;
break;
case SPU_CMD_SET_COORDINATES:
/* 05xxxyyyxxxyyy (coordinates) */
p_spu->i_x = GetBits( &p_spudec->bit_stream, 12 );
p_spu->i_width = GetBits( &p_spudec->bit_stream, 12 )
- p_spu->i_x + 1;
p_spu->i_y = GetBits( &p_spudec->bit_stream, 12 );
p_spu->i_height = GetBits( &p_spudec->bit_stream, 12 )
- p_spu->i_y + 1;
i_index += 6;
break;
case SPU_CMD_SET_OFFSETS:
/* 06xxxxyyyy (byte offsets) */
p_spu->p_sys->pi_offset[0] =
GetBits( &p_spudec->bit_stream, 16 ) - 4;
p_spu->p_sys->pi_offset[1] =
GetBits( &p_spudec->bit_stream, 16 ) - 4;
i_index += 4;
break;
case SPU_CMD_END:
/* ff (end) */
break;
default:
/* xx (unknown command) */
msg_Err( p_spudec->p_fifo, "unknown command 0x%.2x",
i_command );
return( 1 );
}
/* We need to check for quit commands here */
if( p_spudec->p_fifo->b_die )
{
return( 1 );
}
} while( i_command != SPU_CMD_END );
} while( i_index == i_next_seq );
/* Check that the next sequence index matches the current one */
if( i_next_seq != i_cur_seq )
{
msg_Err( p_spudec->p_fifo, "index mismatch (0x%.4x != 0x%.4x)",
i_next_seq, i_cur_seq );
return( 1 );
}
if( i_index > p_spudec->i_spu_size )
{
msg_Err( p_spudec->p_fifo, "uh-oh, we went too far (0x%.4x > 0x%.4x)",
i_index, p_spudec->i_spu_size );
return( 1 );
}
if( !p_spu->i_start )
{
msg_Err( p_spudec->p_fifo, "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:
break;
/* More than one padding byte - this is very strange, but
* we can deal with it */
default:
msg_Warn( p_spudec->p_fifo,
"%i padding bytes, we usually get 0 or 1 of them",
p_spudec->i_spu_size - i_index );
while( i_index < p_spudec->i_spu_size )
{
RemoveBits( &p_spudec->bit_stream, 8 );
i_index++;
}
break;
}
if( b_force_display )
{
msg_Err( p_spudec->p_fifo, "\"force display\" command" );
msg_Err( p_spudec->p_fifo, "send mail to <sam@zoy.org> if you "
"want to help debugging this" );
}
/* Successfully parsed ! */
return( 0 );
}
/*****************************************************************************
* ParseRLE: parse the RLE part of the subtitle
*****************************************************************************
* This part parses the subtitle graphical data and stores it in a more
* 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( spudec_thread_t *p_spudec,
subpicture_t * p_spu, u8 * p_src )
{
unsigned int i_code;
unsigned int i_width = p_spu->i_width;
unsigned int i_height = p_spu->i_height;
unsigned int i_x, i_y;
u16 *p_dest = (u16 *)p_spu->p_sys->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;
vlc_bool_t b_empty_top = 1,
b_empty_bottom = 0;
unsigned int i_skipped_top = 0,
i_skipped_bottom = 0;
/* Colormap statistics */
int i_border = -1;
int stats[4]; stats[0] = stats[1] = stats[2] = stats[3] = 0;
pi_table[ 0 ] = p_spu->p_sys->pi_offset[ 0 ] << 1;
pi_table[ 1 ] = p_spu->p_sys->pi_offset[ 1 ] << 1;
for( i_y = 0 ; i_y < i_height ; i_y++ )
{
pi_offset = pi_table + i_id;
for( i_x = 0 ; i_x < i_width ; i_x += i_code >> 2 )
{
i_code = AddNibble( 0, p_src, pi_offset );
if( i_code < 0x04 )
{
i_code = AddNibble( i_code, p_src, pi_offset );
if( i_code < 0x10 )
{
i_code = AddNibble( i_code, p_src, pi_offset );
if( i_code < 0x040 )
{
i_code = AddNibble( i_code, p_src, pi_offset );
if( i_code < 0x0100 )
{
/* If the 14 first bits are set to 0, then it's a
* new line. We emulate it. */
if( i_code < 0x0004 )
{
i_code |= ( i_width - i_x ) << 2;
}
else
{
/* We have a boo boo ! */
msg_Err( p_spudec->p_fifo, "unknown RLE code "
"0x%.4x", i_code );
return( 1 );
}
}
}
}
}
if( ( (i_code >> 2) + i_x + i_y * i_width ) > i_height * i_width )
{
msg_Err( p_spudec->p_fifo,
"out of bounds, %i at (%i,%i) is out of %ix%i",
i_code >> 2, i_x, i_y, i_width, i_height );
return( 1 );
}
/* Try to find the border color */
if( p_spu->p_sys->pi_alpha[ i_code & 0x3 ] != 0x00 )
{
i_border = i_code & 0x3;
stats[i_border] += i_code >> 2;
}
if( (i_code >> 2) == i_width
&& p_spu->p_sys->pi_alpha[ i_code & 0x3 ] == 0x00 )
{
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 */
if( i_x > i_width )
{
msg_Err( p_spudec->p_fifo, "i_x overflowed, %i > %i",
i_x, i_width );
return( 1 );
}
/* Byte-align the stream */
if( *pi_offset & 0x1 )
{
(*pi_offset)++;
}
/* Swap fields */
i_id = ~i_id & 0x1;
}
/* We shouldn't get any padding bytes */
if( i_y < i_height )
{
msg_Err( p_spudec->p_fifo, "padding bytes found in RLE sequence" );
msg_Err( p_spudec->p_fifo, "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 );
}
msg_Dbg( p_spudec->p_fifo, "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;
msg_Dbg( p_spudec->p_fifo, "cropped to: %ix%i, position: %i,%i",
p_spu->i_width, p_spu->i_height, p_spu->i_x, p_spu->i_y );
}
/* Handle color if no palette was found */
if( !p_spu->p_sys->b_palette )
{
int i, i_inner = -1, i_shade = -1;
/* Set the border color */
p_spu->p_sys->pi_yuv[i_border][0] = 0x00;
p_spu->p_sys->pi_yuv[i_border][1] = 0x80;
p_spu->p_sys->pi_yuv[i_border][2] = 0x80;
stats[i_border] = 0;
/* Find the inner colors */
for( i = 0 ; i < 4 && i_inner == -1 ; i++ )
{
if( stats[i] )
{
i_inner = i;
}
}
for( ; i < 4 && i_shade == -1 ; i++ )
{
if( stats[i] )
{
if( stats[i] > stats[i_inner] )
{
i_shade = i_inner;
i_inner = i;
}
else
{
i_shade = i;
}
}
}
/* Set the inner color */
if( i_inner != -1 )
{
p_spu->p_sys->pi_yuv[i_inner][0] = 0xff;
p_spu->p_sys->pi_yuv[i_inner][1] = 0x80;
p_spu->p_sys->pi_yuv[i_inner][2] = 0x80;
}
/* Set the anti-aliasing color */
if( i_shade != -1 )
{
p_spu->p_sys->pi_yuv[i_shade][0] = 0x80;
p_spu->p_sys->pi_yuv[i_shade][1] = 0x80;
p_spu->p_sys->pi_yuv[i_shade][2] = 0x80;
}
msg_Dbg( p_spudec->p_fifo,
"using custom palette (border %i, inner %i, shade %i)",
i_border, i_inner, i_shade );
}
return( 0 );
}
modules/codec/spudec/render.c 0 → 100644
View file @ ba97736a
/*****************************************************************************
* render.c : SPU renderer
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
* $Id: render.c,v 1.1 2002/08/16 03:07:56 sam Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
* Rudolf Cornelissen <rag.cornelissen@inter.nl.net>
* Roine Gustafsson <roine@popstar.com>
*
* 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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* memcpy(), memset() */
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include <vlc/decoder.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* getpid() */
#endif
#ifdef WIN32 /* getpid() for win32 is located in process.h */
# include <process.h>
#endif
#include "spudec.h"
/*****************************************************************************
* RenderSPU: draw an SPU on a picture
*****************************************************************************
* This is a fast implementation of the subpicture drawing code. The data
* has been preprocessed once, so we don't need to parse the RLE buffer again
* and again. Most sanity checks are already done so that this routine can be
* as fast as possible.
*****************************************************************************/
void E_(RenderSPU)( vout_thread_t *p_vout, picture_t *p_pic,
const subpicture_t *p_spu )
{
/* Common variables */
u16 p_clut16[4];
u32 p_clut32[4];
u8 *p_dest;
u8 *p_destptr;
u16 *p_source = (u16 *)p_spu->p_sys->p_data;
int i_x, i_y;
int i_len, i_color;
u16 i_colprecomp, i_destalpha;
u8 i_cnt;
/* RGB-specific */
int i_xscale, i_yscale, i_width, i_height, i_ytmp, i_yreal, i_ynext;
switch( p_vout->output.i_chroma )
{
/* I420 target, no scaling */
case VLC_FOURCC('I','4','2','0'):
case VLC_FOURCC('I','Y','U','V'):
case VLC_FOURCC('Y','V','1','2'):
p_dest = p_pic->Y_PIXELS + p_spu->i_x + p_spu->i_width
+ p_pic->Y_PITCH * ( p_spu->i_y + p_spu->i_height );
/* Draw until we reach the bottom of the subtitle */
for( i_y = p_spu->i_height * p_pic->Y_PITCH ;
i_y ;
i_y -= p_pic->Y_PITCH )
{
/* Draw until we reach the end of the line */
for( i_x = p_spu->i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
i_len = *p_source++ >> 2;
switch( p_spu->p_sys->pi_alpha[i_color] )
{
case 0x00:
break;
case 0x0f:
memset( p_dest - i_x - i_y,
p_spu->p_sys->pi_yuv[i_color][0], i_len );
break;
default:
/* To be able to divide by 16 (>>4) we add 1 to the alpha.
* This means Alpha 0 won't be completely transparent, but
* that's handled in a special case above anyway. */
i_colprecomp = (u16)p_spu->p_sys->pi_yuv[i_color][0]
* (u16)(p_spu->p_sys->pi_alpha[i_color] + 1);
i_destalpha = 15 - p_spu->p_sys->pi_alpha[i_color];
for ( p_destptr = p_dest - i_x - i_y;
p_destptr < p_dest - i_x - i_y + i_len;
p_destptr++ )
{
*p_destptr = ( i_colprecomp +
(u16)*p_destptr * i_destalpha ) >> 4;
}
break;
}
i_x -= i_len;
}
}
break;
/* RV16 target, scaling */
case VLC_FOURCC('R','V','1','6'):
/* XXX: this is a COMPLETE HACK, memcpy is unable to do u16s anyway */
/* FIXME: get this from the DVD */
for( i_color = 0; i_color < 4; i_color++ )
{
p_clut16[i_color] = 0x1111
* ( (u16)p_spu->p_sys->pi_yuv[i_color][0] >> 4 );
}
i_xscale = ( p_vout->output.i_width << 6 ) / p_vout->render.i_width;
i_yscale = ( p_vout->output.i_height << 6 ) / p_vout->render.i_height;
i_width = p_spu->i_width * i_xscale;
i_height = p_spu->i_height * i_yscale;
p_dest = p_pic->p->p_pixels + ( i_width >> 6 ) * 2
/* Add the picture coordinates and the SPU coordinates */
+ ( (p_spu->i_x * i_xscale) >> 6 ) * 2
+ ( (p_spu->i_y * i_yscale) >> 6 ) * p_pic->p->i_pitch;
/* Draw until we reach the bottom of the subtitle */
for( i_y = 0 ; i_y < i_height ; )
{
i_ytmp = i_y >> 6;
i_y += i_yscale;
/* Check whether we need to draw one line or more than one */
if( i_ytmp + 1 >= ( i_y >> 6 ) )
{
/* Just one line : we precalculate i_y >> 6 */
i_yreal = p_pic->p->i_pitch * i_ytmp;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 2 * ( i_x >> 6 ) + i_yreal,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 2 * ( i_x >> 6 ) + i_yreal,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
}
}
}
else
{
i_yreal = p_pic->p->i_pitch * i_ytmp;
i_ynext = p_pic->p->i_pitch * i_y >> 6;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw as many lines as needed */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 2 * ( i_x >> 6 ) + i_ytmp,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 2 * ( i_x >> 6 ) + i_ytmp,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
}
}
}
}
break;
/* RV32 target, scaling */
case VLC_FOURCC('R','V','2','4'):
case VLC_FOURCC('R','V','3','2'):
/* XXX: this is a COMPLETE HACK, memcpy is unable to do u32s anyway */
/* FIXME: get this from the DVD */
for( i_color = 0; i_color < 4; i_color++ )
{
p_clut32[i_color] = 0x11111111
* ( (u16)p_spu->p_sys->pi_yuv[i_color][0] >> 4 );
}
i_xscale = ( p_vout->output.i_width << 6 ) / p_vout->render.i_width;
i_yscale = ( p_vout->output.i_height << 6 ) / p_vout->render.i_height;
i_width = p_spu->i_width * i_xscale;
i_height = p_spu->i_height * i_yscale;
p_dest = p_pic->p->p_pixels + ( i_width >> 6 ) * 4
/* Add the picture coordinates and the SPU coordinates */
+ ( (p_spu->i_x * i_xscale) >> 6 ) * 4
+ ( (p_spu->i_y * i_yscale) >> 6 ) * p_pic->p->i_pitch;
/* Draw until we reach the bottom of the subtitle */
for( i_y = 0 ; i_y < i_height ; )
{
i_ytmp = i_y >> 6;
i_y += i_yscale;
/* Check whether we need to draw one line or more than one */
if( i_ytmp + 1 >= ( i_y >> 6 ) )
{
/* Just one line : we precalculate i_y >> 6 */
i_yreal = p_pic->p->i_pitch * i_ytmp;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 4 * ( i_x >> 6 ) + i_yreal,
p_clut32[ i_color ], 4 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 4 * ( i_x >> 6 ) + i_yreal,
p_clut32[ i_color ], 4 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
}
}
}
else
{
i_yreal = p_pic->p->i_pitch * i_ytmp;
i_ynext = p_pic->p->i_pitch * i_y >> 6;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw as many lines as needed */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 4 * ( i_x >> 6 ) + i_ytmp,
p_clut32[ i_color ],
4 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 4 * ( i_x >> 6 ) + i_ytmp,
p_clut32[ i_color ],
4 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
}
}
}
}
break;
/* NVidia overlay, no scaling */
case VLC_FOURCC('Y','U','Y','2'):
p_dest = p_pic->p->p_pixels +
(p_spu->i_x + p_spu->i_width +
p_vout->output.i_width * ( p_spu->i_y + p_spu->i_height )) * 2;
/* Draw until we reach the bottom of the subtitle */
for( i_y = p_spu->i_height * p_vout->output.i_width;
i_y ;
i_y -= p_vout->output.i_width )
{
/* Draw until we reach the end of the line */
for( i_x = p_spu->i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= *p_source++ >> 2;
break;
case 0x0f:
i_len = *p_source++ >> 2;
for( i_cnt = 0; i_cnt < i_len; i_cnt++ )
{
/* draw a pixel */
/* Y */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2,
p_spu->p_sys->pi_yuv[i_color][0], 1);
if (!(i_cnt & 0x01))
{
/* U and V */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 1,
0x80, 1);
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 3,
0x80, 1);
}
}
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = *p_source++ >> 2;
for( i_cnt = 0; i_cnt < i_len; i_cnt++ )
{
/* draw a pixel */
/* Y */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2,
p_spu->p_sys->pi_yuv[i_color][0], 1);
if (!(i_cnt & 0x01))
{
/* U and V */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 1,
0x80, 1);
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 3,
0x80, 1);
}
}
i_x -= i_len;
break;
}
}
}
break;
default:
msg_Err( p_vout, "unknown chroma, can't render SPU" );
break;
}
}
modules/codec/spudec/spudec.c
View file @ ba97736a
/*****************************************************************************
* spudec.c : spu decoder thread
* spudec.c : SPU decoder thread
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
* $Id: spudec.c,v 1.1 2002/08/04 17:23:42 sam Exp $
* $Id: spudec.c,v 1.2 2002/08/16 03:07:56 sam Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
* Rudolf Cornelissen <rag.cornelissen@inter.nl.net>
*
* 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
......@@ -50,12 +49,6 @@ static int RunDecoder ( decoder_fifo_t * );
static int InitThread ( spudec_thread_t * );
static void EndThread ( spudec_thread_t * );
static int SyncPacket ( spudec_thread_t * );
static void ParsePacket ( spudec_thread_t * );
static int ParseControlSequences( spudec_thread_t *, subpicture_t * );
static int ParseRLE ( spudec_thread_t *, subpicture_t *, u8 * );
static void RenderSPU ( vout_thread_t *, picture_t *,
const subpicture_t * );
/*****************************************************************************
* Module descriptor.
*****************************************************************************/
......@@ -118,9 +111,9 @@ static int RunDecoder( decoder_fifo_t * p_fifo )
*/
while( (!p_spudec->p_fifo->b_die) && (!p_spudec->p_fifo->b_error) )
{
if( !SyncPacket( p_spudec ) )
if( !E_(SyncPacket)( p_spudec ) )
{
ParsePacket( p_spudec );
E_(ParsePacket)( p_spudec );
}
}
......@@ -210,1001 +203,3 @@ static void EndThread( spudec_thread_t *p_spudec )
free( p_spudec );
}
/*****************************************************************************
* SyncPacket: get in sync with the stream
*****************************************************************************
* This function makes a few sanity checks and returns 0 if it looks like we
* are at the beginning of a subpicture packet.
*****************************************************************************/
static int SyncPacket( spudec_thread_t *p_spudec )
{
/* Re-align the buffer on an 8-bit boundary */
RealignBits( &p_spudec->bit_stream );
/* The total SPU packet size, often bigger than a PS packet */
p_spudec->i_spu_size = GetBits( &p_spudec->bit_stream, 16 );
/* The RLE stuff size (remove 4 because we just read 32 bits) */
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_spu_size
|| ( p_spudec->i_rle_size >= p_spudec->i_spu_size ) )
{
return( 1 );
}
RemoveBits( &p_spudec->bit_stream, 16 );
return( 0 );
}
/*****************************************************************************
* ParsePacket: parse an SPU packet and send it to the video output
*****************************************************************************
* This function parses the SPU packet and, if valid, sends it to the
* video output.
*****************************************************************************/
static void ParsePacket( spudec_thread_t *p_spudec )
{
subpicture_t * p_spu;
u8 * p_src;
unsigned int i_offset;
msg_Dbg( p_spudec->p_fifo, "trying to gather a 0x%.2x long subtitle",
p_spudec->i_spu_size );
/* We cannot display a subpicture with no date */
if( p_spudec->p_fifo->p_first->i_pts == 0 )
{
msg_Warn( p_spudec->p_fifo, "subtitle without a date" );
return;
}
/* Allocate the subpicture internal data. */
p_spu = vout_CreateSubPicture( p_spudec->p_vout, MEMORY_SUBPICTURE,
sizeof( subpicture_sys_t )
+ p_spudec->i_rle_size * 4 );
/* Rationale for the "p_spudec->i_rle_size * 4": we are going to
* expand the RLE stuff so that we won't need to read nibbles later
* on. This will speed things up a lot. Plus, we'll only need to do
* this stupid interlacing stuff once. */
if( p_spu == NULL )
{
return;
}
/* Fill the p_spu structure */
p_spu->pf_render = RenderSPU;
p_spu->p_sys->p_data = (u8*)p_spu->p_sys + sizeof( subpicture_sys_t );
p_spu->p_sys->b_palette = 0;
/* Get display time now. If we do it later, we may miss the PTS. */
p_spu->p_sys->i_pts = p_spudec->p_fifo->p_first->i_pts;
/* Allocate the temporary buffer we will parse */
p_src = malloc( p_spudec->i_rle_size );
if( p_src == NULL )
{
msg_Err( p_spudec->p_fifo, "out of memory" );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
/* Get RLE data */
for( i_offset = 0; i_offset < p_spudec->i_rle_size;
i_offset += SPU_CHUNK_SIZE )
{
GetChunk( &p_spudec->bit_stream, p_src + i_offset,
( i_offset + SPU_CHUNK_SIZE < p_spudec->i_rle_size ) ?
SPU_CHUNK_SIZE : p_spudec->i_rle_size - i_offset );
/* Abort subtitle parsing if we were requested to stop */
if( p_spudec->p_fifo->b_die )
{
free( p_src );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
}
#if 0
/* Dump the subtitle info */
intf_WarnHexDump( 5, p_spu->p_sys->p_data, p_spudec->i_rle_size );
#endif
/* Getting the control part */
if( ParseControlSequences( p_spudec, p_spu ) )
{
/* There was a parse error, delete the subpicture */
free( p_src );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
/* At this point, no more GetBit() command is needed, so we have all
* the data we need to tell whether the subtitle is valid. Thus we
* try to display it and we ignore b_die. */
if( ParseRLE( p_spudec, p_spu, p_src ) )
{
/* There was a parse error, delete the subpicture */
free( p_src );
vout_DestroySubPicture( p_spudec->p_vout, p_spu );
return;
}
msg_Dbg( p_spudec->p_fifo, "total size: 0x%x, RLE offsets: 0x%x 0x%x",
p_spudec->i_spu_size,
p_spu->p_sys->pi_offset[0], p_spu->p_sys->pi_offset[1] );
/* SPU is finished - we can ask the video output to display it */
vout_DisplaySubPicture( p_spudec->p_vout, p_spu );
/* Clean up */
free( p_src );
}
/*****************************************************************************
* ParseControlSequences: parse all SPU control sequences
*****************************************************************************
* This is the most important part in SPU decoding. We get dates, palette
* information, coordinates, and so on. For more information on the
* subtitles format, see http://sam.zoy.org/doc/dvd/subtitles/index.html
*****************************************************************************/
static int ParseControlSequences( spudec_thread_t *p_spudec,
subpicture_t * p_spu )
{
/* Our current index in the SPU packet */
int i_index = p_spudec->i_rle_size + 4;
/* The next start-of-control-sequence index and the previous one */
int i_next_seq, i_cur_seq;
/* Command time and date */
u8 i_command;
int i_date;
int i, pi_alpha[4];
/* XXX: temporary variables */
vlc_bool_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_cur_seq = i_index;
i_next_seq = GetBits( &p_spudec->bit_stream, 16 );
/* Skip what we just read */
i_index += 4;
do
{
i_command = GetBits( &p_spudec->bit_stream, 8 );
i_index++;
switch( i_command )
{
case SPU_CMD_FORCE_DISPLAY:
/* 00 (force displaying) */
p_spu->i_start = p_spu->p_sys->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->i_start = p_spu->p_sys->i_pts + ( i_date * 11000 );
break;
case SPU_CMD_STOP_DISPLAY:
/* 02 (stop displaying) */
p_spu->i_stop = p_spu->p_sys->i_pts + ( i_date * 11000 );
break;
case SPU_CMD_SET_PALETTE:
/* 03xxxx (palette) */
if( p_spudec->p_fifo->p_demux_data &&
*(int*)p_spudec->p_fifo->p_demux_data == 0xBeeF )
{
u32 i_color;
p_spu->p_sys->b_palette = 1;
for( i = 0; i < 4 ; i++ )
{
i_color = ((u32*)((char*)p_spudec->p_fifo->
p_demux_data + sizeof(int)))[
GetBits(&p_spudec->bit_stream, 4) ];
/* FIXME: this job should be done sooner */
#ifndef WORDS_BIGENDIAN
p_spu->p_sys->pi_yuv[3-i][0] = (i_color>>16) & 0xff;
p_spu->p_sys->pi_yuv[3-i][1] = (i_color>>0) & 0xff;
p_spu->p_sys->pi_yuv[3-i][2] = (i_color>>8) & 0xff;
#else
p_spu->p_sys->pi_yuv[3-i][0] = (i_color>>8) & 0xff;
p_spu->p_sys->pi_yuv[3-i][1] = (i_color>>24) & 0xff;
p_spu->p_sys->pi_yuv[3-i][2] = (i_color>>16) & 0xff;
#endif
}
}
else
{
RemoveBits( &p_spudec->bit_stream, 16 );
}
i_index += 2;
break;
case SPU_CMD_SET_ALPHACHANNEL:
/* 04xxxx (alpha channel) */
pi_alpha[3] = GetBits( &p_spudec->bit_stream, 4 );
pi_alpha[2] = GetBits( &p_spudec->bit_stream, 4 );
pi_alpha[1] = GetBits( &p_spudec->bit_stream, 4 );
pi_alpha[0] = GetBits( &p_spudec->bit_stream, 4 );
/* Ignore blank alpha palette. Sometimes spurious blank
* alpha palettes are present - dunno why. */
if( pi_alpha[0] | pi_alpha[1] | pi_alpha[2] | pi_alpha[3] )
{
p_spu->p_sys->pi_alpha[0] = pi_alpha[0];
p_spu->p_sys->pi_alpha[1] = pi_alpha[1];
p_spu->p_sys->pi_alpha[2] = pi_alpha[2];
p_spu->p_sys->pi_alpha[3] = pi_alpha[3];
}
else
{
msg_Warn( p_spudec->p_fifo,
"ignoring blank alpha palette" );
}
i_index += 2;
break;
case SPU_CMD_SET_COORDINATES:
/* 05xxxyyyxxxyyy (coordinates) */
p_spu->i_x = GetBits( &p_spudec->bit_stream, 12 );
p_spu->i_width = GetBits( &p_spudec->bit_stream, 12 )
- p_spu->i_x + 1;
p_spu->i_y = GetBits( &p_spudec->bit_stream, 12 );
p_spu->i_height = GetBits( &p_spudec->bit_stream, 12 )
- p_spu->i_y + 1;
i_index += 6;
break;
case SPU_CMD_SET_OFFSETS:
/* 06xxxxyyyy (byte offsets) */
p_spu->p_sys->pi_offset[0] =
GetBits( &p_spudec->bit_stream, 16 ) - 4;
p_spu->p_sys->pi_offset[1] =
GetBits( &p_spudec->bit_stream, 16 ) - 4;
i_index += 4;
break;
case SPU_CMD_END:
/* ff (end) */
break;
default:
/* xx (unknown command) */
msg_Err( p_spudec->p_fifo, "unknown command 0x%.2x",
i_command );
return( 1 );
}
/* We need to check for quit commands here */
if( p_spudec->p_fifo->b_die )
{
return( 1 );
}
} while( i_command != SPU_CMD_END );
} while( i_index == i_next_seq );
/* Check that the next sequence index matches the current one */
if( i_next_seq != i_cur_seq )
{
msg_Err( p_spudec->p_fifo, "index mismatch (0x%.4x != 0x%.4x)",
i_next_seq, i_cur_seq );
return( 1 );
}
if( i_index > p_spudec->i_spu_size )
{
msg_Err( p_spudec->p_fifo, "uh-oh, we went too far (0x%.4x > 0x%.4x)",
i_index, p_spudec->i_spu_size );
return( 1 );
}
if( !p_spu->i_start )
{
msg_Err( p_spudec->p_fifo, "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:
break;
/* More than one padding byte - this is very strange, but
* we can deal with it */
default:
msg_Warn( p_spudec->p_fifo,
"%i padding bytes, we usually get 0 or 1 of them",
p_spudec->i_spu_size - i_index );
while( i_index < p_spudec->i_spu_size )
{
RemoveBits( &p_spudec->bit_stream, 8 );
i_index++;
}
break;
}
if( b_force_display )
{
msg_Err( p_spudec->p_fifo, "\"force display\" command" );
msg_Err( p_spudec->p_fifo, "send mail to <sam@zoy.org> if you "
"want to help debugging this" );
}
/* Successfully parsed ! */
return( 0 );
}
/*****************************************************************************
* ParseRLE: parse the RLE part of the subtitle
*****************************************************************************
* This part parses the subtitle graphical data and stores it in a more
* 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( spudec_thread_t *p_spudec,
subpicture_t * p_spu, u8 * p_src )
{
unsigned int i_code;
unsigned int i_width = p_spu->i_width;
unsigned int i_height = p_spu->i_height;
unsigned int i_x, i_y;
u16 *p_dest = (u16 *)p_spu->p_sys->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;
vlc_bool_t b_empty_top = 1,
b_empty_bottom = 0;
unsigned int i_skipped_top = 0,
i_skipped_bottom = 0;
/* Colormap statistics */
int i_border = -1;
int stats[4]; stats[0] = stats[1] = stats[2] = stats[3] = 0;
pi_table[ 0 ] = p_spu->p_sys->pi_offset[ 0 ] << 1;
pi_table[ 1 ] = p_spu->p_sys->pi_offset[ 1 ] << 1;
for( i_y = 0 ; i_y < i_height ; i_y++ )
{
pi_offset = pi_table + i_id;
for( i_x = 0 ; i_x < i_width ; i_x += i_code >> 2 )
{
i_code = AddNibble( 0, p_src, pi_offset );
if( i_code < 0x04 )
{
i_code = AddNibble( i_code, p_src, pi_offset );
if( i_code < 0x10 )
{
i_code = AddNibble( i_code, p_src, pi_offset );
if( i_code < 0x040 )
{
i_code = AddNibble( i_code, p_src, pi_offset );
if( i_code < 0x0100 )
{
/* If the 14 first bits are set to 0, then it's a
* new line. We emulate it. */
if( i_code < 0x0004 )
{
i_code |= ( i_width - i_x ) << 2;
}
else
{
/* We have a boo boo ! */
msg_Err( p_spudec->p_fifo, "unknown RLE code "
"0x%.4x", i_code );
return( 1 );
}
}
}
}
}
if( ( (i_code >> 2) + i_x + i_y * i_width ) > i_height * i_width )
{
msg_Err( p_spudec->p_fifo,
"out of bounds, %i at (%i,%i) is out of %ix%i",
i_code >> 2, i_x, i_y, i_width, i_height );
return( 1 );
}
/* Try to find the border color */
if( p_spu->p_sys->pi_alpha[ i_code & 0x3 ] != 0x00 )
{
i_border = i_code & 0x3;
stats[i_border] += i_code >> 2;
}
if( (i_code >> 2) == i_width
&& p_spu->p_sys->pi_alpha[ i_code & 0x3 ] == 0x00 )
{
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 */
if( i_x > i_width )
{
msg_Err( p_spudec->p_fifo, "i_x overflowed, %i > %i",
i_x, i_width );
return( 1 );
}
/* Byte-align the stream */
if( *pi_offset & 0x1 )
{
(*pi_offset)++;
}
/* Swap fields */
i_id = ~i_id & 0x1;
}
/* We shouldn't get any padding bytes */
if( i_y < i_height )
{
msg_Err( p_spudec->p_fifo, "padding bytes found in RLE sequence" );
msg_Err( p_spudec->p_fifo, "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 );
}
msg_Dbg( p_spudec->p_fifo, "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;
msg_Dbg( p_spudec->p_fifo, "cropped to: %ix%i, position: %i,%i",
p_spu->i_width, p_spu->i_height, p_spu->i_x, p_spu->i_y );
}
/* Handle color if no palette was found */
if( !p_spu->p_sys->b_palette )
{
int i, i_inner = -1, i_shade = -1;
/* Set the border color */
p_spu->p_sys->pi_yuv[i_border][0] = 0x00;
p_spu->p_sys->pi_yuv[i_border][1] = 0x80;
p_spu->p_sys->pi_yuv[i_border][2] = 0x80;
stats[i_border] = 0;
/* Find the inner colors */
for( i = 0 ; i < 4 && i_inner == -1 ; i++ )
{
if( stats[i] )
{
i_inner = i;
}
}
for( ; i < 4 && i_shade == -1 ; i++ )
{
if( stats[i] )
{
if( stats[i] > stats[i_inner] )
{
i_shade = i_inner;
i_inner = i;
}
else
{
i_shade = i;
}
}
}
/* Set the inner color */
if( i_inner != -1 )
{
p_spu->p_sys->pi_yuv[i_inner][0] = 0xff;
p_spu->p_sys->pi_yuv[i_inner][1] = 0x80;
p_spu->p_sys->pi_yuv[i_inner][2] = 0x80;
}
/* Set the anti-aliasing color */
if( i_shade != -1 )
{
p_spu->p_sys->pi_yuv[i_shade][0] = 0x80;
p_spu->p_sys->pi_yuv[i_shade][1] = 0x80;
p_spu->p_sys->pi_yuv[i_shade][2] = 0x80;
}
msg_Dbg( p_spudec->p_fifo,
"using custom palette (border %i, inner %i, shade %i)",
i_border, i_inner, i_shade );
}
return( 0 );
}
/*****************************************************************************
* RenderSPU: draw an SPU on a picture
*****************************************************************************
* This is a fast implementation of the subpicture drawing code. The data
* has been preprocessed once, so we don't need to parse the RLE buffer again
* and again. Most sanity checks are already done so that this routine can be
* as fast as possible.
*****************************************************************************/
static void RenderSPU( vout_thread_t *p_vout, picture_t *p_pic,
const subpicture_t *p_spu )
{
/* Common variables */
u16 p_clut16[4];
u32 p_clut32[4];
u8 *p_dest;
u8 *p_destptr = (u8 *)p_dest;
u16 *p_source = (u16 *)p_spu->p_sys->p_data;
int i_x, i_y;
int i_len, i_color, i_colprecomp, i_destalpha;
u8 i_cnt;
/* RGB-specific */
int i_xscale, i_yscale, i_width, i_height, i_ytmp, i_yreal, i_ynext;
switch( p_vout->output.i_chroma )
{
/* I420 target, no scaling */
case VLC_FOURCC('I','4','2','0'):
case VLC_FOURCC('I','Y','U','V'):
case VLC_FOURCC('Y','V','1','2'):
p_dest = p_pic->Y_PIXELS + p_spu->i_x + p_spu->i_width
+ p_pic->Y_PITCH * ( p_spu->i_y + p_spu->i_height );
/* Draw until we reach the bottom of the subtitle */
for( i_y = p_spu->i_height * p_pic->Y_PITCH ;
i_y ;
i_y -= p_pic->Y_PITCH )
{
/* Draw until we reach the end of the line */
for( i_x = p_spu->i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
i_len = *p_source++ >> 2;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
break;
case 0x0f:
memset( p_dest - i_x - i_y,
p_spu->p_sys->pi_yuv[i_color][0], i_len );
break;
default:
/* To be able to divide by 16 (>>4) we add 1 to the alpha.
* This means Alpha 0 won't be completely transparent, but
* that's handled in a special case above anyway. */
i_colprecomp = p_spu->p_sys->pi_yuv[i_color][0]
* (p_spu->p_sys->pi_alpha[ i_color ] + 1);
i_destalpha = 15 - p_spu->p_sys->pi_alpha[ i_color ];
for ( p_destptr = p_dest - i_x - i_y;
p_destptr < p_dest - i_x - i_y + i_len;
p_destptr++ )
{
*p_destptr = ( i_colprecomp +
*p_destptr * i_destalpha ) >> 4;
}
break;
}
i_x -= i_len;
}
}
break;
/* RV16 target, scaling */
case VLC_FOURCC('R','V','1','6'):
/* XXX: this is a COMPLETE HACK, memcpy is unable to do u16s anyway */
/* FIXME: get this from the DVD */
for( i_color = 0; i_color < 4; i_color++ )
{
p_clut16[i_color] = 0x1111
* ( (u16)p_spu->p_sys->pi_yuv[i_color][0] >> 4 );
}
i_xscale = ( p_vout->output.i_width << 6 ) / p_vout->render.i_width;
i_yscale = ( p_vout->output.i_height << 6 ) / p_vout->render.i_height;
i_width = p_spu->i_width * i_xscale;
i_height = p_spu->i_height * i_yscale;
p_dest = p_pic->p->p_pixels + ( i_width >> 6 ) * 2
/* Add the picture coordinates and the SPU coordinates */
+ ( (p_spu->i_x * i_xscale) >> 6 ) * 2
+ ( (p_spu->i_y * i_yscale) >> 6 ) * p_pic->p->i_pitch;
/* Draw until we reach the bottom of the subtitle */
for( i_y = 0 ; i_y < i_height ; )
{
i_ytmp = i_y >> 6;
i_y += i_yscale;
/* Check whether we need to draw one line or more than one */
if( i_ytmp + 1 >= ( i_y >> 6 ) )
{
/* Just one line : we precalculate i_y >> 6 */
i_yreal = p_pic->p->i_pitch * i_ytmp;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 2 * ( i_x >> 6 ) + i_yreal,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 2 * ( i_x >> 6 ) + i_yreal,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
}
}
}
else
{
i_yreal = p_pic->p->i_pitch * i_ytmp;
i_ynext = p_pic->p->i_pitch * i_y >> 6;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw as many lines as needed */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 2 * ( i_x >> 6 ) + i_ytmp,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 2 * ( i_x >> 6 ) + i_ytmp,
p_clut16[ i_color ],
2 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
}
}
}
}
break;
/* RV32 target, scaling */
case VLC_FOURCC('R','V','2','4'):
case VLC_FOURCC('R','V','3','2'):
/* XXX: this is a COMPLETE HACK, memcpy is unable to do u32s anyway */
/* FIXME: get this from the DVD */
for( i_color = 0; i_color < 4; i_color++ )
{
p_clut32[i_color] = 0x11111111
* ( (u16)p_spu->p_sys->pi_yuv[i_color][0] >> 4 );
}
i_xscale = ( p_vout->output.i_width << 6 ) / p_vout->render.i_width;
i_yscale = ( p_vout->output.i_height << 6 ) / p_vout->render.i_height;
i_width = p_spu->i_width * i_xscale;
i_height = p_spu->i_height * i_yscale;
p_dest = p_pic->p->p_pixels + ( i_width >> 6 ) * 4
/* Add the picture coordinates and the SPU coordinates */
+ ( (p_spu->i_x * i_xscale) >> 6 ) * 4
+ ( (p_spu->i_y * i_yscale) >> 6 ) * p_pic->p->i_pitch;
/* Draw until we reach the bottom of the subtitle */
for( i_y = 0 ; i_y < i_height ; )
{
i_ytmp = i_y >> 6;
i_y += i_yscale;
/* Check whether we need to draw one line or more than one */
if( i_ytmp + 1 >= ( i_y >> 6 ) )
{
/* Just one line : we precalculate i_y >> 6 */
i_yreal = p_pic->p->i_pitch * i_ytmp;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 4 * ( i_x >> 6 ) + i_yreal,
p_clut32[ i_color ], 4 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
memset( p_dest - 4 * ( i_x >> 6 ) + i_yreal,
p_clut32[ i_color ], 4 * ( ( i_len >> 6 ) + 1 ) );
i_x -= i_len;
break;
}
}
}
else
{
i_yreal = p_pic->p->i_pitch * i_ytmp;
i_ynext = p_pic->p->i_pitch * i_y >> 6;
/* Draw until we reach the end of the line */
for( i_x = i_width ; i_x ; )
{
/* Get the RLE part, then draw as many lines as needed */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= i_xscale * ( *p_source++ >> 2 );
break;
case 0x0f:
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 4 * ( i_x >> 6 ) + i_ytmp,
p_clut32[ i_color ],
4 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = i_xscale * ( *p_source++ >> 2 );
for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
i_ytmp += p_pic->p->i_pitch )
{
memset( p_dest - 4 * ( i_x >> 6 ) + i_ytmp,
p_clut32[ i_color ],
4 * ( ( i_len >> 6 ) + 1 ) );
}
i_x -= i_len;
break;
}
}
}
}
break;
/* NVidia overlay, no scaling */
case VLC_FOURCC('Y','U','Y','2'):
p_dest = p_pic->p->p_pixels +
(p_spu->i_x + p_spu->i_width +
p_vout->output.i_width * ( p_spu->i_y + p_spu->i_height )) * 2;
/* Draw until we reach the bottom of the subtitle */
for( i_y = p_spu->i_height * p_vout->output.i_width;
i_y ;
i_y -= p_vout->output.i_width )
{
/* Draw until we reach the end of the line */
for( i_x = p_spu->i_width ; i_x ; )
{
/* Get the RLE part, then draw the line */
i_color = *p_source & 0x3;
switch( p_spu->p_sys->pi_alpha[ i_color ] )
{
case 0x00:
i_x -= *p_source++ >> 2;
break;
case 0x0f:
i_len = *p_source++ >> 2;
for( i_cnt = 0; i_cnt < i_len; i_cnt++ )
{
/* draw a pixel */
/* Y */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2,
p_spu->p_sys->pi_yuv[i_color][0], 1);
if (!(i_cnt & 0x01))
{
/* U and V */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 1,
0x80, 1);
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 3,
0x80, 1);
}
}
i_x -= i_len;
break;
default:
/* FIXME: we should do transparency */
i_len = *p_source++ >> 2;
for( i_cnt = 0; i_cnt < i_len; i_cnt++ )
{
/* draw a pixel */
/* Y */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2,
p_spu->p_sys->pi_yuv[i_color][0], 1);
if (!(i_cnt & 0x01))
{
/* U and V */
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 1,
0x80, 1);
memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 3,
0x80, 1);
}
}
i_x -= i_len;
break;
}
}
}
break;
default:
msg_Err( p_vout, "unknown chroma, can't render SPU" );
break;
}
}
modules/codec/spudec/spudec.h
View file @ ba97736a
......@@ -2,7 +2,7 @@
* spudec.h : sub picture unit decoder thread interface
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: spudec.h,v 1.1 2002/08/04 17:23:42 sam Exp $
* $Id: spudec.h,v 1.2 2002/08/16 03:07:56 sam Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
......@@ -81,24 +81,12 @@ typedef struct spudec_thread_t
#define SPU_CMD_SET_OFFSETS 0x06
#define SPU_CMD_END 0xff
/*****************************************************************************
* AddNibble: read a nibble from a source packet and add it to our integer.
*****************************************************************************/
static inline unsigned int AddNibble( unsigned int i_code,
u8 *p_src, int *pi_index )
{
if( *pi_index & 0x1 )
{
return( i_code << 4 | ( p_src[(*pi_index)++ >> 1] & 0xf ) );
}
else
{
return( i_code << 4 | p_src[(*pi_index)++ >> 1] >> 4 );
}
}
/*****************************************************************************
* Prototypes
*****************************************************************************/
vlc_thread_t spudec_CreateThread( decoder_fifo_t * p_fifo );
int E_(SyncPacket) ( spudec_thread_t * );
void E_(ParsePacket) ( spudec_thread_t * );
void E_(RenderSPU) ( vout_thread_t *, picture_t *,
const subpicture_t * );
modules/demux/mpeg/audio.c
View file @ ba97736a
......@@ -2,7 +2,7 @@
* audio.c : mpeg audio Stream input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: audio.c,v 1.4 2002/08/13 20:28:56 fenrir Exp $
* $Id: audio.c,v 1.5 2002/08/16 03:07:56 sam Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
......@@ -477,7 +477,7 @@ static int SkipID3Tag( input_thread_t *p_input )
i_size += 10;
}
i_size += 10;
msg_Dbg( p_input, "ID3 tag found, skiping %d bytes", i_size );
msg_Dbg( p_input, "ID3 tag found, skipping %d bytes", i_size );
if ( input_Peek( p_input, &p_peek, i_size ) < i_size )
{
msg_Err( p_input, "cannot peek()" );
......@@ -497,20 +497,22 @@ static int SkipID3Tag( input_thread_t *p_input )
static int CheckPS( input_thread_t *p_input )
{
u8 *p_peek;
int i_startcode = 0;
int i_size = input_Peek( p_input, &p_peek, 8196 );
while( i_size > 4 )
{
if( ( p_peek[0] == 0 ) && ( p_peek[1] == 0 )&&
( p_peek[2] == 1 ) && ( p_peek[3] >= 0xb9 ) )
if( ( p_peek[0] == 0 ) && ( p_peek[1] == 0 ) &&
( p_peek[2] == 1 ) && ( p_peek[3] >= 0xb9 ) &&
++i_startcode >= 3 )
{
return( 1 ); /* it could be ps so ...*/
return 1;
}
p_peek++;
i_size--;
}
return( 0 );
return 0;
}
/*****************************************************************************
......
modules/gui/kde/interface.cpp
View file @ ba97736a
......@@ -117,7 +117,7 @@ void KInterface::initActions()
next->setStatusText( i18n( "Next" ) );
// use the absolute path to your ktestui.rc file for testing purpose in createGUI();
createGUI("plugins/kde/ui.rc");
createGUI("modules/gui/kde/ui.rc");
}
void KInterface::initStatusBar()
......
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