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Commit a1c4ba2f authored by Rocky Bernstein's avatar Rocky Bernstein
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Keep in synch with rest of source. Should also have no effect on upcoming release

parent 1170be35
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Showing with 134 additions and 180 deletions
modules/codec/ogt/ogt.c
View file @ a1c4ba2f
......@@ -2,7 +2,7 @@
* ogt.c : Overlay Graphics Text (SVCD subtitles) decoder thread
*****************************************************************************
* Copyright (C) 2003 VideoLAN
* $Id: ogt.c,v 1.3 2003/12/22 02:24:51 sam Exp $
* $Id: ogt.c,v 1.4 2003/12/26 02:47:59 rocky Exp $
*
* Authors: Rocky Bernstein
* based on code from:
......@@ -67,6 +67,7 @@ vlc_module_end();
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void InitSubtitleBlock( decoder_sys_t * p_sys );
static vout_thread_t *FindVout( decoder_t *);
static block_t *Reassemble( decoder_t *, block_t ** );
......@@ -75,23 +76,6 @@ static void Decode ( decoder_t *, block_t ** );
static block_t *Packetize( decoder_t *, block_t ** );
/*****************************************************************************
InitSubtitleBlock:
Initialize so the next packet will start off a new one.
*****************************************************************************/
static void
InitSubtitleBlock( decoder_sys_t * p_sys )
{
p_sys->i_spu_size = 0;
p_sys->state = SUBTITLE_BLOCK_EMPTY;
p_sys->i_spu = 0;
p_sys->p_block = NULL;
}
/*****************************************************************************
* DecoderOpen
*****************************************************************************
......@@ -112,10 +96,11 @@ DecoderOpen( vlc_object_t *p_this )
p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
p_sys->i_debug = config_GetInt( p_this, MODULE_STRING "-debug" );
p_sys->b_packetizer = VLC_FALSE;
p_sys->p_vout = NULL;
p_sys->i_image = -1;
p_sys->i_debug = config_GetInt( p_this, MODULE_STRING "-debug" );
p_sys->b_packetizer = VLC_FALSE;
p_sys->p_vout = NULL;
p_sys->i_image = -1;
p_sys->subtitle_data = NULL;
InitSubtitleBlock( p_sys );
......@@ -216,12 +201,14 @@ Decode ( decoder_t *p_dec, block_t **pp_block )
InitSubtitleBlock ( p_sys );
}
}
/*****************************************************************************
* Packetize:
*****************************************************************************/
static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
static block_t *
Packetize( decoder_t *p_dec, block_t **pp_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_spu = Reassemble( p_dec, pp_block );
......@@ -238,112 +225,65 @@ static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
return NULL;
}
/*
The following information is mostly extracted from the SubMux package of
unknown author with additional experimentation.
/* following functions are local */
The format is roughly as follows (everything is big-endian):
static void
InitSubtitleData(decoder_sys_t *p_sys)
{
if ( p_sys->subtitle_data ) {
if ( p_sys->subtitle_data_size < p_sys->i_spu_size ) {
p_sys->subtitle_data = realloc(p_sys->subtitle_data,
p_sys->i_spu_size);
p_sys->subtitle_data_size = p_sys->i_spu_size;
}
} else {
p_sys->subtitle_data = malloc(p_sys->i_spu_size);
p_sys->subtitle_data_size = p_sys->i_spu_size;
/* FIXME: wrong place to get p_sys */
p_sys->i_image = 0;
}
p_sys->subtitle_data_pos = 0;
}
size description
-------------------------------------------
byte subtitle channel (0..7) in bits 0-3
byte subtitle packet number of this subtitle image 0-N,
if the subtitle packet is complete, the top bit of the byte is 1.
uint16 subtitle image number
uint16 length in bytes of the rest
byte option flags, unknown meaning except bit 3 (0x08) indicates
presence of the duration field
byte unknown
uint32 duration in 1/90000ths of a second (optional), start time
is as indicated by the PTS in the PES header
uint32 xpos
uint32 ypos
uint32 width (must be even)
uint32 height (must be even)
byte[16] palette, 4 palette entries, each contains values for
Y, U, V and transparency, 0 standing for transparent
byte command,
cmd>>6==1 indicates shift
(cmd>>4)&3 is direction from, (0=top,1=left,2=right,3=bottom)
uint32 shift duration in 1/90000ths of a second
uint16 offset of odd field (subtitle image is presented interlaced)
byte[] bit image
The image is encoded using two bits per pixel that select a palette
entry except that value 00 starts a limited rle. When 00 is seen,
the next two bits (00-11) encode the number of pixels (1-4, add one to
the indicated value) to fill with the color in palette entry 0).
The encoding of each line is padded to a whole number of bytes. The
first field is padded to an even byte lenght and the complete subtitle
is padded to a 4-byte multiple that always include one zero byte at
the end.
*/
/* FIXME: do we really need p_buffer and p?
Can't all of thes _offset's and _lengths's get removed?
*/
static void
ParseHeader( decoder_t *p_dec, uint8_t *p_buffer, block_t *p_block )
static void
AppendData ( decoder_t *p_dec, uint8_t *buffer, uint32_t buf_len )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t *p = p_buffer;
int i;
p_sys->i_pts = p_block->i_pts;
int chunk_length = buf_len;
p_sys->i_spu_size = GETINT16(p);
p_sys->i_options = *p++;
p_sys->i_options2 = *p++;
if ( chunk_length > p_sys->i_spu_size - p_sys->subtitle_data_pos ) {
msg_Warn( p_dec, "too much data (%d) expecting at most %u",
chunk_length, p_sys->i_spu_size - p_sys->subtitle_data_pos );
if ( p_sys->i_options & 0x08 ) {
p_sys->i_duration = GETINT32(p);
} else {
/* 0 means display until next subtitle comes in. */
p_sys->i_duration = 0;
}
p_sys->i_x_start= GETINT16(p);
p_sys->i_y_start= GETINT16(p);
p_sys->i_width = GETINT16(p);
p_sys->i_height = GETINT16(p);
for (i=0; i<4; i++) {
p_sys->pi_palette[i].y = *p++;
p_sys->pi_palette[i].u = *p++;
p_sys->pi_palette[i].v = *p++;
/* We have just 4-bit resolution for alpha, but the value for SVCD
* has 8 bits so we scale down the values to the acceptable range */
p_sys->pi_palette[i].t = (*p++) >> 4;
chunk_length = p_sys->i_spu_size - p_sys->subtitle_data_pos;
}
p_sys->i_cmd = *p++;
/* We do not really know this, FIXME */
if ( p_sys->i_cmd ) {
p_sys->i_cmd_arg = GETINT32(p);
if ( chunk_length > 0 ) {
memcpy(p_sys->subtitle_data + p_sys->subtitle_data_pos,
buffer, chunk_length);
p_sys->subtitle_data_pos += chunk_length;
dbg_print(DECODE_DBG_PACKET, "%d bytes appended, pointer now %d",
chunk_length, p_sys->subtitle_data_pos);
}
/* Image starts just after skipping next short */
p_sys->comp_image_offset = p + 2 - p_buffer;
/* There begins the first field, so no correction needed */
p_sys->first_field_offset = 0;
/* Actually, this is measured against a different origin, so we have to
adjust it */
p_sys->second_field_offset = GETINT16(p);
p_sys->comp_image_offset = p - p_buffer;
p_sys->comp_image_length =
p_sys->subtitle_data_length - p_sys->comp_image_offset;
p_sys->metadata_length = p_sys->comp_image_offset;
/*spuogt_init_subtitle_data(p_sys);*/
}
/*****************************************************************************
InitSubtitleBlock:
Initialize so the next packet will start off a new one.
*****************************************************************************/
static void
InitSubtitleBlock( decoder_sys_t * p_sys )
{
p_sys->i_spu_size = 0;
p_sys->state = SUBTITLE_BLOCK_EMPTY;
p_sys->i_spu = 0;
p_sys->p_block = NULL;
p_sys->subtitle_data_pos = 0;
dbg_print( (DECODE_DBG_PACKET),
"x-start: %d, y-start: %d, width: %d, height %d, "
"spu size: %d, duration: %u",
p_sys->i_x_start, p_sys->i_y_start,
p_sys->i_width, p_sys->i_height,
p_sys->i_spu_size, p_sys->i_duration );
}
#define SPU_HEADER_LEN 5
/*****************************************************************************
......@@ -352,8 +292,8 @@ ParseHeader( decoder_t *p_dec, uint8_t *p_buffer, block_t *p_block )
The data for single screen subtitle may come in one of many
non-contiguous packets of a stream. This routine is called when the
next packet in the stream comes in. The job of this routine is to
parse the header if this is the beginning) and combine the packets into one
complete subtitle unit.
parse the header, if this is the beginning, and combine the packets
into one complete subtitle unit.
If everything is complete, we will return a block. Otherwise return
NULL.
......@@ -395,10 +335,13 @@ Reassemble( decoder_t *p_dec, block_t **pp_block )
p_buffer = p_block->p_buffer;
dbg_print( (DECODE_DBG_CALL|DECODE_DBG_PACKET),
"header: 0x%02x 0x%02x 0x%02x 0x%02x\n",
p_buffer[1], p_buffer[2], p_buffer[3], p_buffer[4] );
dbg_print( (DECODE_DBG_CALL|DECODE_DBG_PACKET),
"header: 0x%02x 0x%02x 0x%02x 0x%02x, size: %i",
p_buffer[1], p_buffer[2], p_buffer[3], p_buffer[4],
p_block->i_buffer);
if( config_GetInt( p_dec, "spu-channel" ) != p_buffer[1] )
return NULL;
if ( p_sys->state == SUBTITLE_BLOCK_EMPTY ) {
i_expected_image = p_sys->i_image+1;
......@@ -421,7 +364,7 @@ Reassemble( decoder_t *p_dec, block_t **pp_block )
p_sys->i_image = GETINT16(p_buffer);
if ( p_sys->i_image != i_expected_image ) {
msg_Warn( p_dec, "expecting subtitle image %u but found %u\n",
msg_Warn( p_dec, "expecting subtitle image %u but found %u",
i_expected_image, p_sys->i_image );
}
......@@ -434,10 +377,15 @@ Reassemble( decoder_t *p_dec, block_t **pp_block )
if ( p_sys->i_packet == 0 ) {
/* First packet in the subtitle block */
ParseHeader( p_dec, p_buffer, p_block );
E_(ParseHeader)( p_dec, p_buffer, p_block );
InitSubtitleData(p_sys);
}
/* FIXME - remove append_data and use chainappend */
AppendData( p_dec, p_buffer, p_block->i_buffer - 5 );
block_ChainAppend( &p_sys->p_block, p_block );
p_sys->i_spu += p_block->i_buffer - SPU_HEADER_LEN;
if (p_sys->state == SUBTITLE_BLOCK_COMPLETE)
......@@ -456,8 +404,6 @@ Reassemble( decoder_t *p_dec, block_t **pp_block )
return NULL;
}
/* following functions are local */
/*****************************************************************************
* FindVout: Find a vout or wait for one to be created.
*****************************************************************************/
......
modules/codec/ogt/ogt.h
View file @ a1c4ba2f
......@@ -2,7 +2,7 @@
* ogt.h : Overlay Graphics Text (SVCD subtitles) decoder thread interface
*****************************************************************************
* Copyright (C) 2003 VideoLAN
* $Id: ogt.h,v 1.3 2003/12/22 14:32:55 sam Exp $
* $Id: ogt.h,v 1.4 2003/12/26 02:47:59 rocky Exp $
*
* Author: Rocky Bernstein
* based on code from:
......@@ -27,7 +27,8 @@
#define DECODE_DBG_EXT 1 /* Calls from external routines */
#define DECODE_DBG_CALL 2 /* all calls */
#define DECODE_DBG_PACKET 4 /* packet assembly info */
#define DECODE_DBG_INFO 8
#define DECODE_DBG_IMAGE 8 /* image bitmaps */
#define DECODE_DBG_INFO 16
#define DECODE_DEBUG 1
#if DECODE_DEBUG
......@@ -46,63 +47,77 @@
#define GETINT32(p) ( (p[0] << 24) + (p[1] << 16) + \
(p[2] << 8) + (p[3]) ) ; p += 4;
/* The number of color palette entries allowed in a subtitle. */
#define NUM_SUBTITLE_COLORS 4
typedef enum {
SUBTITLE_BLOCK_EMPTY,
SUBTITLE_BLOCK_PARTIAL,
SUBTITLE_BLOCK_COMPLETE
} packet_state_t;
/* FIXME: REMOVE THE BELOW. */
/* Color and transparency of a pixel or a palette (CLUT) entry */
typedef struct ogt_yuvt_val_s {
uint8_t y;
uint8_t u;
uint8_t v;
uint8_t t;
} ogt_yuvt_val_t;
} ogt_yuvt_t;
struct decoder_sys_t
{
int i_debug; /* debugging mask */
/* The storage used by one pixel */
#define PIXEL_SIZE 4
int b_packetizer;
/* Size in bytes of YUV portion above. */
#define YUV_SIZE 3
mtime_t i_pts; /* Start PTS of subtitle block */
int i_spu_size; /* size of the allocated subtitle_data */
int i_spu;
packet_state_t state; /* data-gathering state for this subtitle */
uint16_t i_image; /* image number in the subtitle stream; 0 is the
first one. */
uint8_t i_packet; /* packet number for above image number; 0 is the
first one. */
/* Transparency plane. NOTE: see vlc_video.h for V_PLANE */
#define T_PLANE V_PLANE+1
block_t *p_block; /* Bytes of the packet. */
uint8_t buffer[65536 + 20 ]; /* we will never overflow more than 11 bytes if I'm right */
struct decoder_sys_t
{
int i_debug; /* debugging mask */
mtime_t i_pts; /* Start PTS of subtitle block */
int i_spu;
packet_state_t state; /* data-gathering state for this subtitle */
uint16_t i_image; /* image number in the subtitle stream; 0 is the
first one. */
uint8_t i_packet;/* packet number for above image number; 0 is the
first one. */
block_t *p_block;/* Bytes of the packet. */
uint8_t buffer[65536 + 20 ]; /* we will never overflow more than 11
bytes if I'm right */
int b_packetizer;
int i_spu_size; /* goal for subtitle_data_pos while gathering,
size of used subtitle_data later */
vout_thread_t *p_vout;
/* Move into subpicture_sys_t? */
uint16_t comp_image_offset; /* offset from subtitle_data to compressed
image data */
int comp_image_length; /* size of the compressed image data */
int first_field_offset;
int second_field_offset;
/* FIXME: Remove this? */
uint8_t *subtitle_data; /* buffer used to accumulate data from
successive packets in the same subtitle */
int subtitle_data_size; /* size of the allocated subtitle_data */
/* Move into subpicture_sys_t? */
uint16_t comp_image_offset; /* offset from subtitle_data to compressed
image data */
int comp_image_length; /* size of the compressed image data */
int second_field_offset; /* offset of odd raster lines */
int metadata_offset; /* offset to data describing the image */
int metadata_length; /* length of metadata */
int subtitle_data_pos; /* where to write next chunk */
int subtitle_data_length; /* goal for subtitle_data_pos while gathering,
length of used subtitle_data later */
int subtitle_data_pos; /* where to write next chunk */
uint32_t i_duration; /* how long to display the image, 0 stands
for "until next subtitle" */
uint32_t i_duration; /* how long to display the image, 0 stands
for "until next subtitle" */
uint16_t i_x_start, i_y_start; /* position of top leftmost pixel of
image when displayed */
uint16_t i_width, i_height; /* dimensions in pixels of image */
uint16_t i_x_start, i_y_start; /* position of top leftmost pixel of
image when displayed */
uint16_t i_width, i_height; /* dimensions in pixels of image */
ogt_yuvt_val_t pi_palette[4];
ogt_yuvt_t pi_palette[NUM_SUBTITLE_COLORS];
uint8_t i_options;
uint8_t i_options2;
......@@ -112,33 +127,26 @@ struct decoder_sys_t
struct subpicture_sys_t
{
mtime_t i_pts; /* presentation timestamp */
int pi_offset[2]; /* byte offsets to data */
void *p_data;
/* Color information */
vlc_bool_t b_palette;
ogt_yuvt_val_t pi_palette[4];
#ifndef FIXED
uint8_t pi_alpha[4];
uint8_t pi_yuv[4][3];
#endif
/* Link to our input */
vlc_object_t * p_input;
/* Cropping properties */
vlc_mutex_t lock;
vlc_bool_t b_crop;
unsigned int i_x_start, i_y_start, i_x_end, i_y_end;
mtime_t i_pts; /* presentation timestamp */
u_int8_t *p_data; /* Image data one byte T, Y, U, V */
/* Color information */
vlc_bool_t b_palette;
/* Link to our input */
vlc_object_t * p_input;
/* Cropping properties */
vlc_mutex_t lock;
vlc_bool_t b_crop;
unsigned int i_x_start, i_y_start, i_x_end, i_y_end;
};
/*****************************************************************************
* Prototypes
*****************************************************************************/
void E_(ParseHeader)( decoder_t *, uint8_t *, block_t * );
void E_(ParsePacket)( decoder_t * );
void E_(RenderSPU) ( vout_thread_t *, picture_t *, const subpicture_t * );
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