/* $Id: decsub.c,v 1.12 2005/04/14 17:37:54 titer Exp $
This file is part of the HandBrake source code.
- Homepage: <http://handbrake.m0k.org/>.
+ Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
-struct hb_work_object_s
+struct hb_work_private_s
{
- HB_WORK_COMMON;
-
hb_job_t * job;
uint8_t buf[0xFFFF];
int64_t pts;
int64_t pts_start;
int64_t pts_stop;
+ int pts_forced;
int x;
int y;
int width;
int height;
+ int stream_id;
int offsets[2];
uint8_t lum[4];
+ uint8_t chromaU[4];
+ uint8_t chromaV[4];
uint8_t alpha[4];
};
+static hb_buffer_t * Decode( hb_work_object_t * );
-/***********************************************************************
- * Local prototypes
- **********************************************************************/
-static void Close( hb_work_object_t ** _w );
-static int Work( hb_work_object_t * w, hb_buffer_t ** buf_in,
- hb_buffer_t ** buf_out );
-static hb_buffer_t * Decode( hb_work_object_t * w );
-static void ParseControls( hb_work_object_t * w );
-static hb_buffer_t * CropSubtitle( hb_work_object_t * w,
- uint8_t * raw );
-
-/***********************************************************************
- * hb_work_decsub_init
- ***********************************************************************
- *
- **********************************************************************/
-hb_work_object_t * hb_work_decsub_init( hb_job_t * job )
+int decsubInit( hb_work_object_t * w, hb_job_t * job )
{
- hb_work_object_t * w = calloc( sizeof( hb_work_object_t ), 1 );
- w->name = strdup( "Subtitle decoder" );
- w->work = Work;
- w->close = Close;
+ hb_work_private_t * pv;
- w->job = job;
- w->pts = -1;
+ pv = calloc( 1, sizeof( hb_work_private_t ) );
+ w->private_data = pv;
- return w;
-}
+ pv->job = job;
+ pv->pts = -1;
-/***********************************************************************
- * Close
- ***********************************************************************
- * Free memory
- **********************************************************************/
-static void Close( hb_work_object_t ** _w )
-{
- hb_work_object_t * w = *_w;
- free( w->name );
- free( w );
- *_w = NULL;
+ return 0;
}
-/***********************************************************************
- * Work
- ***********************************************************************
- *
- **********************************************************************/
-static int Work( hb_work_object_t * w, hb_buffer_t ** buf_in,
- hb_buffer_t ** buf_out )
+int decsubWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
+ hb_buffer_t ** buf_out )
{
+ hb_work_private_t * pv = w->private_data;
hb_buffer_t * in = *buf_in;
-
int size_sub, size_rle;
+ if ( in->size <= 0 )
+ {
+ /* EOF on input stream - send it downstream & say that we're done */
+ *buf_out = in;
+ *buf_in = NULL;
+ return HB_WORK_DONE;
+ }
+
+ pv->stream_id = in->id;
+
size_sub = ( in->data[0] << 8 ) | in->data[1];
size_rle = ( in->data[2] << 8 ) | in->data[3];
- if( !w->size_sub )
+ if( !pv->size_sub )
{
/* We are looking for the start of a new subtitle */
if( size_sub && size_rle && size_sub > size_rle &&
in->size <= size_sub )
{
/* Looks all right so far */
- w->size_sub = size_sub;
- w->size_rle = size_rle;
+ pv->size_sub = size_sub;
+ pv->size_rle = size_rle;
- memcpy( w->buf, in->data, in->size );
- w->size_got = in->size;
- w->pts = in->start;
+ memcpy( pv->buf, in->data, in->size );
+ pv->size_got = in->size;
+ pv->pts = in->start;
}
}
else
{
/* We are waiting for the end of the current subtitle */
- if( in->size <= w->size_sub - w->size_got )
+ if( in->size <= pv->size_sub - pv->size_got )
{
- memcpy( w->buf + w->size_got, in->data, in->size );
- w->size_got += in->size;
+ memcpy( pv->buf + pv->size_got, in->data, in->size );
+ pv->size_got += in->size;
if( in->start >= 0 )
{
- w->pts = in->start;
+ pv->pts = in->start;
}
}
}
*buf_out = NULL;
- if( w->size_sub && w->size_sub == w->size_got )
+ if( pv->size_sub && pv->size_sub == pv->size_got )
{
/* We got a complete subtitle, decode it */
*buf_out = Decode( w );
+ if( buf_out && *buf_out )
+ {
+ (*buf_out)->sequence = in->sequence;
+ }
+
/* Wait for the next one */
- w->size_sub = 0;
- w->size_got = 0;
- w->size_rle = 0;
- w->pts = -1;
+ pv->size_sub = 0;
+ pv->size_got = 0;
+ pv->size_rle = 0;
+ pv->pts = -1;
}
return HB_WORK_OK;
}
-static hb_buffer_t * Decode( hb_work_object_t * w )
+void decsubClose( hb_work_object_t * w )
{
- int code, line, col;
- int offsets[2];
- int * offset;
- hb_buffer_t * buf;
- uint8_t * buf_raw = NULL;
-
- /* Get infos about the subtitle */
- ParseControls( w );
-
- /* Do the actual decoding now */
- buf_raw = malloc( w->width * w->height * 2 );
-
-#define GET_NEXT_NIBBLE code = ( code << 4 ) | ( ( ( *offset & 1 ) ? \
-( w->buf[((*offset)>>1)] & 0xF ) : ( w->buf[((*offset)>>1)] >> 4 ) ) ); \
-(*offset)++
-
- offsets[0] = w->offsets[0] * 2;
- offsets[1] = w->offsets[1] * 2;
-
- for( line = 0; line < w->height; line++ )
- {
- /* Select even or odd field */
- offset = ( line & 1 ) ? &offsets[1] : &offsets[0];
-
- for( col = 0; col < w->width; col += code >> 2 )
- {
- uint8_t * lum, * alpha;
-
- code = 0;
- GET_NEXT_NIBBLE;
- if( code < 0x4 )
- {
- GET_NEXT_NIBBLE;
- if( code < 0x10 )
- {
- GET_NEXT_NIBBLE;
- if( code < 0x40 )
- {
- GET_NEXT_NIBBLE;
- if( code < 0x100 )
- {
- /* End of line */
- code |= ( w->width - col ) << 2;
- }
- }
- }
- }
-
- lum = buf_raw;
- alpha = lum + w->width * w->height;
- memset( lum + line * w->width + col,
- w->lum[code & 3], code >> 2 );
- memset( alpha + line * w->width + col,
- w->alpha[code & 3], code >> 2 );
- }
-
- /* Byte-align */
- if( *offset & 1 )
- {
- (*offset)++;
- }
- }
-
- /* Crop subtitle (remove transparent borders) */
- buf = CropSubtitle( w, buf_raw );
+ free( w->private_data );
+}
- free( buf_raw );
+hb_work_object_t hb_decsub =
+{
+ WORK_DECSUB,
+ "Subtitle decoder",
+ decsubInit,
+ decsubWork,
+ decsubClose
+};
- return buf;
-}
/***********************************************************************
* ParseControls
**********************************************************************/
static void ParseControls( hb_work_object_t * w )
{
- hb_job_t * job = w->job;
+ hb_work_private_t * pv = w->private_data;
+ hb_job_t * job = pv->job;
hb_title_t * title = job->title;
+ hb_subtitle_t * subtitle;
- int i;
+ int i, n;
int command;
int date, next;
- for( i = w->size_rle; ; )
+ pv->pts_start = 0;
+ pv->pts_stop = 0;
+ pv->pts_forced = 0;
+
+ pv->alpha[3] = 0;
+ pv->alpha[2] = 0;
+ pv->alpha[1] = 0;
+ pv->alpha[0] = 0;
+
+ for( i = pv->size_rle; ; )
{
- date = ( w->buf[i] << 8 ) | w->buf[i+1]; i += 2;
- next = ( w->buf[i] << 8 ) | w->buf[i+1]; i += 2;
+ date = ( pv->buf[i] << 8 ) | pv->buf[i+1]; i += 2;
+ next = ( pv->buf[i] << 8 ) | pv->buf[i+1]; i += 2;
for( ;; )
{
- command = w->buf[i++];
+ command = pv->buf[i++];
- if( command == 0xFF )
+ /*
+ * There are eight commands available for
+ * Sub-Pictures. The first SP_DCSQ should contain, as a
+ * minimum, SET_COLOR, SET_CONTR, SET_DAREA, and
+ * SET_DSPXA
+ */
+
+ if( command == 0xFF ) // 0xFF - CMD_END - ends one SP_DCSQ
{
break;
}
switch( command )
{
- case 0x00:
+ case 0x00: // 0x00 - FSTA_DSP - Forced Start Display, no arguments
+ pv->pts_start = pv->pts + date * 900;
+ pv->pts_forced = 1;
+
+ /*
+ * If we are doing a subtitle scan then note down
+ */
+ if( job->indepth_scan )
+ {
+ for( n=0; n < hb_list_count(title->list_subtitle); n++ )
+ {
+ subtitle = hb_list_item( title->list_subtitle, n);
+ if( pv->stream_id == subtitle->id ) {
+ /*
+ * A hit, count it.
+ */
+ subtitle->forced_hits++;
+ }
+ }
+ }
break;
- case 0x01:
- w->pts_start = w->pts + date * 900;
+ case 0x01: // 0x01 - STA_DSP - Start Display, no arguments
+ pv->pts_start = pv->pts + date * 900;
+ pv->pts_forced = 0;
break;
- case 0x02:
- w->pts_stop = w->pts + date * 900;
+ case 0x02: // 0x02 - STP_DSP - Stop Display, no arguments
+ if(!pv->pts_stop)
+ pv->pts_stop = pv->pts + date * 900;
break;
- case 0x03:
+ case 0x03: // 0x03 - SET_COLOR - Set Colour indices
{
+ /*
+ * SET_COLOR - provides four indices into the CLUT
+ * for the current PGC to associate with the four
+ * pixel values
+ */
int colors[4];
int j;
- colors[0] = (w->buf[i+0]>>4)&0x0f;
- colors[1] = (w->buf[i+0])&0x0f;
- colors[2] = (w->buf[i+1]>>4)&0x0f;
- colors[3] = (w->buf[i+1])&0x0f;
+ colors[0] = (pv->buf[i+0]>>4)&0x0f;
+ colors[1] = (pv->buf[i+0])&0x0f;
+ colors[2] = (pv->buf[i+1]>>4)&0x0f;
+ colors[3] = (pv->buf[i+1])&0x0f;
for( j = 0; j < 4; j++ )
{
+ /*
+ * Not sure what is happening here, in theory
+ * the palette is in YCbCr. And we want YUV.
+ *
+ * However it looks more like YCrCb (according
+ * to pgcedit). And the scalers for YCrCb don't
+ * work, but I get the right colours by doing
+ * no conversion.
+ */
uint32_t color = title->palette[colors[j]];
- w->lum[3-j] = (color>>16) & 0xff;
+ uint8_t Cr, Cb, y;
+ y = (color>>16) & 0xff;
+ Cr = (color>>8) & 0xff;
+ Cb = (color) & 0xff;
+ pv->lum[3-j] = y;
+ pv->chromaU[3-j] = Cb;
+ pv->chromaV[3-j] = Cr;
+ /* hb_log("color[%d] y = %d, u = %d, v = %d",
+ 3-j,
+ pv->lum[3-j],
+ pv->chromaU[3-j],
+ pv->chromaV[3-j]);
+ */
}
i += 2;
break;
}
- case 0x04:
+ case 0x04: // 0x04 - SET_CONTR - Set Contrast
{
- w->alpha[3] = (w->buf[i+0]>>4)&0x0f;
- w->alpha[2] = (w->buf[i+0])&0x0f;
- w->alpha[1] = (w->buf[i+1]>>4)&0x0f;
- w->alpha[0] = (w->buf[i+1])&0x0f;
+ /*
+ * SET_CONTR - directly provides the four contrast
+ * (alpha blend) values to associate with the four
+ * pixel values
+ */
+ uint8_t alpha[4];
+
+ alpha[3] = (pv->buf[i+0]>>4)&0x0f;
+ alpha[2] = (pv->buf[i+0])&0x0f;
+ alpha[1] = (pv->buf[i+1]>>4)&0x0f;
+ alpha[0] = (pv->buf[i+1])&0x0f;
+
+
+ int lastAlpha = pv->alpha[3] + pv->alpha[2] + pv->alpha[1] + pv->alpha[0];
+ int currAlpha = alpha[3] + alpha[2] + alpha[1] + alpha[0];
+
+ // fading-in, save the highest alpha value
+ if( currAlpha > lastAlpha )
+ {
+ pv->alpha[3] = alpha[3];
+ pv->alpha[2] = alpha[2];
+ pv->alpha[1] = alpha[1];
+ pv->alpha[0] = alpha[0];
+ }
+
+ // fading-out
+ if( currAlpha < lastAlpha && !pv->pts_stop )
+ {
+ pv->pts_stop = pv->pts + date * 900;
+ }
+
i += 2;
break;
}
- case 0x05:
+ case 0x05: // 0x05 - SET_DAREA - defines the display area
{
- w->x = (w->buf[i+0]<<4) | ((w->buf[i+1]>>4)&0x0f);
- w->width = (((w->buf[i+1]&0x0f)<<8)| w->buf[i+2]) - w->x + 1;
- w->y = (w->buf[i+3]<<4)| ((w->buf[i+4]>>4)&0x0f);
- w->height = (((w->buf[i+4]&0x0f)<<8)| w->buf[i+5]) - w->y + 1;
+ pv->x = (pv->buf[i+0]<<4) | ((pv->buf[i+1]>>4)&0x0f);
+ pv->width = (((pv->buf[i+1]&0x0f)<<8)| pv->buf[i+2]) - pv->x + 1;
+ pv->y = (pv->buf[i+3]<<4)| ((pv->buf[i+4]>>4)&0x0f);
+ pv->height = (((pv->buf[i+4]&0x0f)<<8)| pv->buf[i+5]) - pv->y + 1;
i += 6;
break;
}
- case 0x06:
+ case 0x06: // 0x06 - SET_DSPXA - defines the pixel data addresses
{
- w->offsets[0] = ( w->buf[i] << 8 ) | w->buf[i+1]; i += 2;
- w->offsets[1] = ( w->buf[i] << 8 ) | w->buf[i+1]; i += 2;
+ pv->offsets[0] = ( pv->buf[i] << 8 ) | pv->buf[i+1]; i += 2;
+ pv->offsets[1] = ( pv->buf[i] << 8 ) | pv->buf[i+1]; i += 2;
break;
}
}
}
+
+
if( i > next )
{
break;
}
i = next;
}
+
+ if( !pv->pts_stop )
+ {
+ /* Show it for 3 seconds */
+ pv->pts_stop = pv->pts_start + 3 * 90000;
+ }
}
/***********************************************************************
**********************************************************************/
static int LineIsTransparent( hb_work_object_t * w, uint8_t * p )
{
+ hb_work_private_t * pv = w->private_data;
int i;
- for( i = 0; i < w->width; i++ )
+ for( i = 0; i < pv->width; i++ )
{
if( p[i] )
{
}
static int ColumnIsTransparent( hb_work_object_t * w, uint8_t * p )
{
+ hb_work_private_t * pv = w->private_data;
int i;
- for( i = 0; i < w->height; i++ )
+ for( i = 0; i < pv->height; i++ )
{
- if( p[i*w->width] )
+ if( p[i*pv->width] )
{
return 0;
}
}
static hb_buffer_t * CropSubtitle( hb_work_object_t * w, uint8_t * raw )
{
+ hb_work_private_t * pv = w->private_data;
int i;
int crop[4] = { -1,-1,-1,-1 };
uint8_t * alpha;
int realwidth, realheight;
hb_buffer_t * buf;
uint8_t * lum_in, * lum_out, * alpha_in, * alpha_out;
+ uint8_t * u_in, * u_out, * v_in, * v_out;
- alpha = raw + w->width * w->height;
+ alpha = raw + pv->width * pv->height;
/* Top */
- for( i = 0; i < w->height; i++ )
+ for( i = 0; i < pv->height; i++ )
{
- if( !LineIsTransparent( w, &alpha[i*w->width] ) )
+ if( !LineIsTransparent( w, &alpha[i*pv->width] ) )
{
crop[0] = i;
break;
}
/* Bottom */
- for( i = w->height - 1; i >= 0; i-- )
+ for( i = pv->height - 1; i >= 0; i-- )
{
- if( !LineIsTransparent( w, &alpha[i*w->width] ) )
+ if( !LineIsTransparent( w, &alpha[i*pv->width] ) )
{
crop[1] = i;
break;
}
/* Left */
- for( i = 0; i < w->width; i++ )
+ for( i = 0; i < pv->width; i++ )
{
if( !ColumnIsTransparent( w, &alpha[i] ) )
{
}
/* Right */
- for( i = w->width - 1; i >= 0; i-- )
+ for( i = pv->width - 1; i >= 0; i-- )
{
if( !ColumnIsTransparent( w, &alpha[i] ) )
{
realwidth = crop[3] - crop[2] + 1;
realheight = crop[1] - crop[0] + 1;
- buf = hb_buffer_init( realwidth * realheight * 2 );
- buf->start = w->pts_start;
- buf->stop = w->pts_stop;
- buf->x = w->x + crop[2];
- buf->y = w->y + crop[0];
+ buf = hb_buffer_init( realwidth * realheight * 4 );
+ buf->start = pv->pts_start;
+ buf->stop = pv->pts_stop;
+ buf->x = pv->x + crop[2];
+ buf->y = pv->y + crop[0];
buf->width = realwidth;
buf->height = realheight;
- lum_in = raw + crop[0] * w->width + crop[2];
- alpha_in = lum_in + w->width * w->height;
+ lum_in = raw + crop[0] * pv->width + crop[2];
+ alpha_in = lum_in + pv->width * pv->height;
+ u_in = alpha_in + pv->width * pv->height;
+ v_in = u_in + pv->width * pv->height;
+
lum_out = buf->data;
alpha_out = lum_out + realwidth * realheight;
+ u_out = alpha_out + realwidth * realheight;
+ v_out = u_out + realwidth * realheight;
for( i = 0; i < realheight; i++ )
{
memcpy( lum_out, lum_in, realwidth );
memcpy( alpha_out, alpha_in, realwidth );
- lum_in += w->width;
- alpha_in += w->width;
+ memcpy( u_out, u_in, realwidth );
+ memcpy( v_out, v_in, realwidth );
+
+ lum_in += pv->width;
+ alpha_in += pv->width;
+ u_in += pv->width;
+ v_in += pv->width;
+
lum_out += realwidth;
alpha_out += realwidth;
+ u_out += realwidth;
+ v_out += realwidth;
}
return buf;
}
+
+static hb_buffer_t * Decode( hb_work_object_t * w )
+{
+ hb_work_private_t * pv = w->private_data;
+ int code, line, col;
+ int offsets[2];
+ int * offset;
+ hb_buffer_t * buf;
+ uint8_t * buf_raw = NULL;
+ hb_job_t * job = pv->job;
+
+ /* Get infos about the subtitle */
+ ParseControls( w );
+
+ if( job->indepth_scan || ( job->subtitle_force && pv->pts_forced == 0 ) )
+ {
+ /*
+ * Don't encode subtitles when doing a scan.
+ *
+ * When forcing subtitles, ignore all those that don't
+ * have the forced flag set.
+ */
+ return NULL;
+ }
+
+ /* Do the actual decoding now */
+ buf_raw = malloc( ( pv->width * pv->height ) * 4 );
+
+#define GET_NEXT_NIBBLE code = ( code << 4 ) | ( ( ( *offset & 1 ) ? \
+( pv->buf[((*offset)>>1)] & 0xF ) : ( pv->buf[((*offset)>>1)] >> 4 ) ) ); \
+(*offset)++
+
+ offsets[0] = pv->offsets[0] * 2;
+ offsets[1] = pv->offsets[1] * 2;
+
+ for( line = 0; line < pv->height; line++ )
+ {
+ /* Select even or odd field */
+ offset = ( line & 1 ) ? &offsets[1] : &offsets[0];
+
+ for( col = 0; col < pv->width; col += code >> 2 )
+ {
+ uint8_t * lum, * alpha, * chromaU, * chromaV;
+
+ code = 0;
+ GET_NEXT_NIBBLE;
+ if( code < 0x4 )
+ {
+ GET_NEXT_NIBBLE;
+ if( code < 0x10 )
+ {
+ GET_NEXT_NIBBLE;
+ if( code < 0x40 )
+ {
+ GET_NEXT_NIBBLE;
+ if( code < 0x100 )
+ {
+ /* End of line */
+ code |= ( pv->width - col ) << 2;
+ }
+ }
+ }
+ }
+
+ lum = buf_raw;
+ alpha = lum + pv->width * pv->height;
+ chromaU = alpha + pv->width * pv->height;
+ chromaV = chromaU + pv->width * pv->height;
+
+ memset( lum + line * pv->width + col,
+ pv->lum[code & 3], code >> 2 );
+ memset( alpha + line * pv->width + col,
+ pv->alpha[code & 3], code >> 2 );
+ memset( chromaU + line * pv->width + col,
+ pv->chromaU[code & 3], code >> 2 );
+ memset( chromaV + line * pv->width + col,
+ pv->chromaV[code & 3], code >> 2 );
+ }
+
+ /* Byte-align */
+ if( *offset & 1 )
+ {
+ (*offset)++;
+ }
+ }
+
+ /* Crop subtitle (remove transparent borders) */
+ buf = CropSubtitle( w, buf_raw );
+
+ free( buf_raw );
+
+ return buf;
+}
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