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vlc-2-2
Commit f78730a8 authored by Rocky Bernstein's avatar Rocky Bernstein
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Add OGT and CVD subtitle demuxers. 

write_png: might be made into a module and moved elsewhere
cvd*: went over documentation a little bit.
parent add4e22d
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Showing with 373 additions and 60 deletions
configure.ac
View file @ f78730a8
dnl Autoconf settings for vlc dnl Autoconf settings for vlc
dnl $Id: configure.ac,v 1.141 2004/01/04 15:32:13 fenrir Exp $ dnl $Id: configure.ac,v 1.142 2004/01/04 16:51:59 rocky Exp $
AC_INIT(vlc,0.7.0) AC_INIT(vlc,0.7.0)
...@@ -869,8 +869,7 @@ dnl ...@@ -869,8 +869,7 @@ dnl
dnl default modules dnl default modules
dnl dnl
AX_ADD_PLUGINS([dummy rc logger gestures memcpy hotkeys]) AX_ADD_PLUGINS([dummy rc logger gestures memcpy hotkeys])
AX_ADD_PLUGINS([mpgv mpga m4v mpeg_system ps ts avi asf aac mp4 rawdv demux2 nsv real]) AX_ADD_PLUGINS([cvdsub svcdsub spudec dvbsub mpeg_audio lpcm a52 dts cinepak])
AX_ADD_PLUGINS([spudec dvbsub mpeg_audio lpcm a52 dts cinepak])
AX_ADD_PLUGINS([deinterlace invert adjust wall transform distort clone crop motionblur]) AX_ADD_PLUGINS([deinterlace invert adjust wall transform distort clone crop motionblur])
AX_ADD_PLUGINS([float32tos16 float32tos8 float32tou16 float32tou8 a52tospdif dtstospdif fixed32tofloat32 fixed32tos16 s16tofixed32 s16tofloat32 s16tofloat32swab s8tofloat32 u8tofixed32 u8tofloat32]) AX_ADD_PLUGINS([float32tos16 float32tos8 float32tou16 float32tou8 a52tospdif dtstospdif fixed32tofloat32 fixed32tos16 s16tofixed32 s16tofloat32 s16tofloat32swab s8tofloat32 u8tofixed32 u8tofloat32])
AX_ADD_PLUGINS([trivial_resampler ugly_resampler linear_resampler bandlimited_resampler]) AX_ADD_PLUGINS([trivial_resampler ugly_resampler linear_resampler bandlimited_resampler])
...@@ -2209,7 +2208,10 @@ dnl png ...@@ -2209,7 +2208,10 @@ dnl png
dnl dnl
AC_CHECK_HEADERS(png.h, [ AC_CHECK_HEADERS(png.h, [
AX_ADD_LDFLAGS([logo],[-lpng -lz]) AX_ADD_LDFLAGS([logo],[-lpng -lz])
AX_ADD_PLUGINS([logo])]) AX_ADD_PLUGINS([logo])
AX_ADD_LDFLAGS([svcdsub],[-lpng -lz])
AX_ADD_LDFLAGS([cvdsub],[-lpng -lz])
AC_DEFINE(HAVE_LIBPNG, [], [Define if you have the PNG library: libpng])])
dnl dnl
dnl Video plugins dnl Video plugins
...@@ -3555,6 +3557,7 @@ AC_CONFIG_FILES([ ...@@ -3555,6 +3557,7 @@ AC_CONFIG_FILES([
modules/codec/Makefile modules/codec/Makefile
modules/codec/ffmpeg/Makefile modules/codec/ffmpeg/Makefile
modules/codec/ffmpeg/postprocessing/Makefile modules/codec/ffmpeg/postprocessing/Makefile
modules/codec/ogt/Makefile
modules/codec/spudec/Makefile modules/codec/spudec/Makefile
modules/control/Makefile modules/control/Makefile
modules/control/corba/Makefile modules/control/corba/Makefile
......
doc/subtitles/cvd-subtitles.txt
View file @ f78730a8
$Id: cvd-subtitles.txt,v 1.1 2004/01/04 16:25:00 rocky Exp $ $Id: cvd-subtitles.txt,v 1.2 2004/01/04 16:51:59 rocky Exp $
The following information is culled from information from The following information is culled from information from
Julio Sanchez Fernandez (http://subhandler.sourceforge.net) Julio Sanchez Fernandez (http://subhandler.sourceforge.net)
by Rocky Bernstein. by Rocky Bernstein.
...@@ -18,10 +18,10 @@ subtitle data and the offset to the metadata - i.e. size of the image ...@@ -18,10 +18,10 @@ subtitle data and the offset to the metadata - i.e. size of the image
data plus the four bytes at the beginning. data plus the four bytes at the beginning.
Data for single screen subtitle may come in several non-contiguous Data for single screen subtitle may come in several non-contiguous
packets of a stream. From the scant data on the format, there is only packets of a stream. From the scant data on the format, the only way
only way known to detect the first packet in a subtitle. The first known to detect the first packet in a subtitle. The first packet
packet seems to have a valid PTS while later packets for the same seems to have a valid PTS while later packets for the same image
image don't. don't.
Image data comes interlaced and is run-length encoded (RLE). Each Image data comes interlaced and is run-length encoded (RLE). Each
field is a four-bit nibbles that is further subdivided in a two-bit field is a four-bit nibbles that is further subdivided in a two-bit
...@@ -56,23 +56,23 @@ code Meaning ...@@ -56,23 +56,23 @@ code Meaning
x = ((p[1]&0x0f)<<6) + (p[2]>>2) x = ((p[1]&0x0f)<<6) + (p[2]>>2)
y = ((p[2]&0x03)<<8) + p[3]; y = ((p[2]&0x03)<<8) + p[3];
0x1f lower right x, y postion, each a 10-bit (0-1023) value, 0x1f lower right x, y position, each a 10-bit (0-1023) value,
encoded as above encoded as above
0x24 3 bytes primary palette 0 - 1 byte for each of y, u, and v 0x24 3 bytes primary palette 0 - 1 byte for each of y, u, and v
0x25 3 bytes primary palette 1 - 1 byte for each of y, u and v 0x25 3 bytes primary palette 1 - 1 byte for each of y, u, and v
0x26 3 bytes primary palette 2 - 1 byte for each of y, u and v 0x26 3 bytes primary palette 2 - 1 byte for each of y, u, and v
0x27 3 bytes primary palette 3 - 1 byte for each of y, u and v 0x27 3 bytes primary palette 3 - 1 byte for each of y, u, and v
0x2c 3 bytes highlight palette 0 - 1 byte for each of y, u, and v 0x2c 3 bytes highlight palette 0 - 1 byte for each of y, u, and v
0x2d 3 bytes highlight palette 1 - 1 byte for each of y, u and v 0x2d 3 bytes highlight palette 1 - 1 byte for each of y, u, and v
0x2e 3 bytes highlight palette 2 - 1 byte for each of y, u and v 0x2e 3 bytes highlight palette 2 - 1 byte for each of y, u, and v
0x2f 3 bytes highlight palette 3 - 1 byte for each of y, u and v 0x2f 3 bytes highlight palette 3 - 1 byte for each of y, u, and v
0x37 3 bytes transparancy for primary palette - 1 byte for each 0x37 3 bytes transparency for primary palette - 1 byte for each
of y, u and v of y, u and v
0x3f 3 bytes transparancy for highlight palette - 1 byte for each 0x3f 3 bytes transparency for highlight palette - 1 byte for each
of y, u and v of y, u and v
0x47 Offset to start of even rows of interlaced image. 0x47 Offset to start of even rows of interlaced image.
......
modules/codec/ogt/.cvsignore 0 → 100644
View file @ f78730a8
Makefile
Makefile.am
Makefile.in
modules/codec/ogt/Modules.am 0 → 100644
View file @ f78730a8
SOURCES_svcdsub = \
common.c \
common.h \
ogt.c \
ogt.h \
subtitle.h \
ogt_parse.c \
render.c \
render.h \
write_png.c \
write_png.h \
$(NULL)
SOURCES_cvdsub = \
common.c \
common.h \
cvd.c \
cvd.h \
subtitle.h \
cvd_parse.c \
render.c \
render.h \
write_png.c \
write_png.h \
$(NULL)
modules/codec/ogt/cvd.c
View file @ f78730a8
...@@ -2,7 +2,7 @@ ...@@ -2,7 +2,7 @@
* cvd.c : CVD Subtitle decoder thread * cvd.c : CVD Subtitle decoder thread
***************************************************************************** *****************************************************************************
* Copyright (C) 2003 VideoLAN * Copyright (C) 2003 VideoLAN
* $Id: cvd.c,v 1.7 2004/01/04 04:56:21 rocky Exp $ * $Id: cvd.c,v 1.8 2004/01/04 16:51:59 rocky Exp $
* *
* Authors: Rocky Bernstein * Authors: Rocky Bernstein
* based on code from: * based on code from:
...@@ -182,11 +182,11 @@ Packetize( decoder_t *p_dec, block_t **pp_block ) ...@@ -182,11 +182,11 @@ Packetize( decoder_t *p_dec, block_t **pp_block )
/***************************************************************************** /*****************************************************************************
Reassemble: Reassemble:
The data for single screen subtitle may come in one of many Data for single screen subtitle may come in several non-contiguous
non-contiguous packets of a stream. This routine is called when the packets of a stream. This routine is called when the next packet in
next packet in the stream comes in. The job of this routine is to the stream comes in. The job of this routine is to parse the header,
parse the header, if this is the beginning, and combine the packets if this is the beginning, and combine the packets into one complete
into one complete subtitle unit. subtitle unit.
If everything is complete, we will return a block. Otherwise return If everything is complete, we will return a block. Otherwise return
NULL. NULL.
...@@ -225,10 +225,10 @@ Reassemble( decoder_t *p_dec, block_t **pp_block ) ...@@ -225,10 +225,10 @@ Reassemble( decoder_t *p_dec, block_t **pp_block )
if( config_GetInt( p_dec, "spu-channel" ) != p_buffer[0] ) if( config_GetInt( p_dec, "spu-channel" ) != p_buffer[0] )
return NULL; return NULL;
/* There is little data on the format, but it does not seem to have a /* From the scant data on the format, there is only only way known
good way to detect the first packet in the subtitle. It seems, to detect the first packet in a subtitle. The first packet
however, that it has a valid pts while later packets for the same seems to have a valid PTS while later packets for the same
image don't */ image don't. */
if ( p_sys->state == SUBTITLE_BLOCK_EMPTY && p_block->i_pts == 0 ) { if ( p_sys->state == SUBTITLE_BLOCK_EMPTY && p_block->i_pts == 0 ) {
msg_Warn( p_dec, msg_Warn( p_dec,
......
modules/codec/ogt/cvd_parse.c
View file @ f78730a8
...@@ -2,7 +2,7 @@ ...@@ -2,7 +2,7 @@
* parse.c: Philips OGT (SVCD subtitle) packet parser * parse.c: Philips OGT (SVCD subtitle) packet parser
***************************************************************************** *****************************************************************************
* Copyright (C) 2003, 2004 VideoLAN * Copyright (C) 2003, 2004 VideoLAN
* $Id: cvd_parse.c,v 1.6 2004/01/04 04:56:21 rocky Exp $ * $Id: cvd_parse.c,v 1.7 2004/01/04 16:51:59 rocky Exp $
* *
* Authors: Rocky Bernstein * Authors: Rocky Bernstein
* based on code from: * based on code from:
...@@ -55,12 +55,12 @@ static int ParseImage ( decoder_t *, subpicture_t * ); ...@@ -55,12 +55,12 @@ static int ParseImage ( decoder_t *, subpicture_t * );
origin. Thus, this is the result of reading some code whose origin. Thus, this is the result of reading some code whose
correctness is not known and some experimentation. correctness is not known and some experimentation.
CVD subtitles are different in severl ways from SVCD OGT subtitles. CVD subtitles are different in several ways from SVCD OGT subtitles.
First, the image comes first and the metadata is at the end. So Image comes first and metadata is at the end. So that the metadata
that the metadata can be found easily, the subtitle packet starts can be found easily, the subtitle packet starts with two bytes
with two bytes (everything is big-endian again) that give the total (everything is big-endian again) that give the total size of the
size of the subtitle data and the offset to the metadata - i.e. size subtitle data and the offset to the metadata - i.e. size of the
of the image data plus the four bytes at the beginning. image data plus the four bytes at the beginning.
Image data comes interlaced is run-length encoded. Each field is a Image data comes interlaced is run-length encoded. Each field is a
four-bit nibble. Each nibble contains a two-bit repeat count and a four-bit nibble. Each nibble contains a two-bit repeat count and a
...@@ -73,11 +73,6 @@ static int ParseImage ( decoder_t *, subpicture_t * ); ...@@ -73,11 +73,6 @@ static int ParseImage ( decoder_t *, subpicture_t * );
that the fill-line complete case above is not as described and the that the fill-line complete case above is not as described and the
zero repeat count means fill line. The sample code never produces zero repeat count means fill line. The sample code never produces
this, so it may be untested. this, so it may be untested.
The metadata section does not follow a fixed pattern, every
metadata item consists of a tag byte followed by parameters. In all
cases known, the block (including the tag byte) is exactly four
bytes in length. Read the code for the rest.
*/ */
void E_(ParseHeader)( decoder_t *p_dec, uint8_t *p_buffer, block_t *p_block ) void E_(ParseHeader)( decoder_t *p_dec, uint8_t *p_buffer, block_t *p_block )
...@@ -108,6 +103,20 @@ void E_(ParseHeader)( decoder_t *p_dec, uint8_t *p_buffer, block_t *p_block ) ...@@ -108,6 +103,20 @@ void E_(ParseHeader)( decoder_t *p_dec, uint8_t *p_buffer, block_t *p_block )
} }
#define ExtractXY(x, y) \
x = ((p[1]&0x0f)<<6) + (p[2]>>2); \
y = ((p[2]&0x03)<<8) + p[3];
/*
We parse the metadata information here.
Although metadata information does not have to come in a fixed field
order, every metadata field consists of a tag byte followed by
parameters. In all cases known, the size including tag byte is
exactly four bytes in length.
*/
void E_(ParseMetaInfo)( decoder_t *p_dec ) void E_(ParseMetaInfo)( decoder_t *p_dec )
{ {
/* last packet in subtitle block. */ /* last packet in subtitle block. */
...@@ -126,7 +135,7 @@ void E_(ParseMetaInfo)( decoder_t *p_dec ) ...@@ -126,7 +135,7 @@ void E_(ParseMetaInfo)( decoder_t *p_dec )
switch ( p[0] ) { switch ( p[0] ) {
case 0x04: /* Display duration in 1/90000ths of a second */ case 0x04: /* subtitle duration in 1/90000ths of a second */
p_sys->i_duration = (p[1]<<16) + (p[2]<<8) + p[3]; p_sys->i_duration = (p[1]<<16) + (p[2]<<8) + p[3];
...@@ -134,25 +143,21 @@ void E_(ParseMetaInfo)( decoder_t *p_dec ) ...@@ -134,25 +143,21 @@ void E_(ParseMetaInfo)( decoder_t *p_dec )
"subtitle display duration %u", p_sys->i_duration); "subtitle display duration %u", p_sys->i_duration);
break; break;
case 0x0c: /* Unknown */ case 0x0c: /* unknown */
dbg_print( DECODE_DBG_PACKET, dbg_print( DECODE_DBG_PACKET,
"subtitle command unknown 0x%0x 0x%0x 0x%0x 0x%0x\n", "subtitle command unknown 0x%0x 0x%0x 0x%0x 0x%0x\n",
p[0], p[1], p[2], p[3]); p[0], p[1], p[2], p[3]);
break; break;
case 0x17: /* Position */ case 0x17: /* coordinates of subtitle upper left x, y position */
p_sys->i_x_start = ((p[1]&0x0f)<<6) + (p[2]>>2); ExtractXY(p_sys->i_x_start, p_sys->i_y_start);
p_sys->i_y_start = ((p[2]&0x03)<<8) + p[3];
dbg_print( DECODE_DBG_PACKET,
"start position (%d,%d): %.2x %.2x %.2x",
p_sys->i_x_start, p_sys->i_y_start,
p[1], p[2], p[3] );
break; break;
case 0x1f: /* Coordinates of the image bottom right */ case 0x1f: /* coordinates of subtitle bottom right x, y position */
{ {
int lastx = ((p[1]&0x0f)<<6) + (p[2]>>2); int lastx;
int lasty = ((p[2]&0x03)<<8) + p[3]; int lasty;
ExtractXY(lastx, lasty);
p_sys->i_width = lastx - p_sys->i_x_start + 1; p_sys->i_width = lastx - p_sys->i_x_start + 1;
p_sys->i_height = lasty - p_sys->i_y_start + 1; p_sys->i_height = lasty - p_sys->i_y_start + 1;
dbg_print( DECODE_DBG_PACKET, dbg_print( DECODE_DBG_PACKET,
...@@ -208,7 +213,7 @@ void E_(ParseMetaInfo)( decoder_t *p_dec ) ...@@ -208,7 +213,7 @@ void E_(ParseMetaInfo)( decoder_t *p_dec )
p_sys->p_palette[3].s.t = p[2] >> 4; p_sys->p_palette[3].s.t = p[2] >> 4;
dbg_print( DECODE_DBG_PACKET, dbg_print( DECODE_DBG_PACKET,
"transparancy for primary palette 0..3: " "transparency for primary palette 0..3: "
"0x%0x 0x%0x 0x%0x 0x%0x", "0x%0x 0x%0x 0x%0x 0x%0x",
p_sys->p_palette[0].s.t, p_sys->p_palette[0].s.t,
p_sys->p_palette[1].s.t, p_sys->p_palette[1].s.t,
...@@ -225,7 +230,7 @@ void E_(ParseMetaInfo)( decoder_t *p_dec ) ...@@ -225,7 +230,7 @@ void E_(ParseMetaInfo)( decoder_t *p_dec )
p_sys->p_palette_highlight[3].s.t = p[1] >> 4; p_sys->p_palette_highlight[3].s.t = p[1] >> 4;
dbg_print( DECODE_DBG_PACKET, dbg_print( DECODE_DBG_PACKET,
"transparancy for primary palette 0..3: " "transparency for primary palette 0..3: "
"0x%0x 0x%0x 0x%0x 0x%0x", "0x%0x 0x%0x 0x%0x 0x%0x",
p_sys->p_palette_highlight[0].s.t, p_sys->p_palette_highlight[0].s.t,
p_sys->p_palette_highlight[1].s.t, p_sys->p_palette_highlight[1].s.t,
...@@ -235,8 +240,8 @@ void E_(ParseMetaInfo)( decoder_t *p_dec ) ...@@ -235,8 +240,8 @@ void E_(ParseMetaInfo)( decoder_t *p_dec )
break; break;
case 0x47: case 0x47:
/* offset to first field data, we correct to make it relative /* offset to start of even rows of interlaced image, we correct
to comp_image_offset (usually 4) */ to make it relative to comp_image_offset (usually 4) */
p_sys->first_field_offset = p_sys->first_field_offset =
(p[2] << 8) + p[3] - p_sys->comp_image_offset; (p[2] << 8) + p[3] - p_sys->comp_image_offset;
dbg_print( DECODE_DBG_PACKET, dbg_print( DECODE_DBG_PACKET,
...@@ -244,8 +249,8 @@ void E_(ParseMetaInfo)( decoder_t *p_dec ) ...@@ -244,8 +249,8 @@ void E_(ParseMetaInfo)( decoder_t *p_dec )
break; break;
case 0x4f: case 0x4f:
/* offset to second field data, we correct to make it relative to /* offset to start of odd rows of interlaced image, we correct
comp_image_offset (usually 4) */ to make it relative to comp_image_offset (usually 4) */
p_sys->second_field_offset = p_sys->second_field_offset =
(p[2] << 8) + p[3] - p_sys->comp_image_offset; (p[2] << 8) + p[3] - p_sys->comp_image_offset;
dbg_print( DECODE_DBG_PACKET, dbg_print( DECODE_DBG_PACKET,
...@@ -309,7 +314,7 @@ E_(ParsePacket)( decoder_t *p_dec) ...@@ -309,7 +314,7 @@ E_(ParsePacket)( decoder_t *p_dec)
p_spu->i_height = p_sys->i_height; p_spu->i_height = p_sys->i_height;
p_spu->i_start = p_sys->i_pts; p_spu->i_start = p_sys->i_pts;
p_spu->i_stop = p_sys->i_pts + (p_sys->i_duration * 5); p_spu->i_stop = p_sys->i_pts + (p_sys->i_duration);
p_spu->p_sys->b_crop = VLC_FALSE; p_spu->p_sys->b_crop = VLC_FALSE;
p_spu->p_sys->i_debug = p_sys->i_debug; p_spu->p_sys->i_debug = p_sys->i_debug;
...@@ -517,7 +522,6 @@ ParseImage( decoder_t *p_dec, subpicture_t * p_spu ) ...@@ -517,7 +522,6 @@ ParseImage( decoder_t *p_dec, subpicture_t * p_spu )
} }
#endif /*HAVE_LIBPNG*/ #endif /*HAVE_LIBPNG*/
VCDInlinePalette( p_dest, p_sys, i_height, i_width ); VCDInlinePalette( p_dest, p_sys, i_height, i_width );
/* The video is automatically scaled. However subtitle bitmaps /* The video is automatically scaled. However subtitle bitmaps
......
modules/codec/ogt/write_png.c 0 → 100644
View file @ f78730a8
/*****************************************************************************
* Dump an Image to a Portable Network Graphics (PNG) file
****************************************************************************
Copyright (C) 2004 VideoLAN
Author: Rocky Bernstein
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.
*****************************************************************************/
#include "config.h"
#ifdef HAVE_LIBPNG
#include <stdio.h>
#include <stdlib.h>
#include "write_png.h"
#include <setjmp.h>
typedef void (*snapshot_messenger_t)(char *message);
#define _(x) x
/*
* Error functions for use as callbacks by the png libraries
*/
void error_msg(char *message)
{
printf("error: %s\n", message);
}
void warning_msg(char *message)
{
printf("warning: %s\n", message);
}
static snapshot_messenger_t error_msg_cb = error_msg;
static snapshot_messenger_t warning_msg_cb = warning_msg;
static void
user_error_fn(png_structp png_ptr, png_const_charp error_msg)
{
if(error_msg_cb) {
char uerror[4096];
memset(&uerror, 0, sizeof(uerror));
sprintf(uerror, _("Error: %s\n"), error_msg);
error_msg_cb(uerror);
}
}
static void
user_warning_fn(png_structp png_ptr, png_const_charp warning_msg)
{
if(error_msg_cb) {
char uerror[4096];
memset(&uerror, 0, sizeof(uerror));
sprintf(uerror, _("Error: %s\n"), warning_msg);
warning_msg_cb(uerror);
}
}
/*
Dump an image to a Portable Network Graphics (PNG) file. File_name
is where the file goes, i_height and i_width are the height and
width in pixels of the image. The data for the image is stored as a
linear array of one byte for each of red, green, and blue
components of an RGB pixel. Thus row[i] will begin at rgb_image +
i*(i_width*3) and the blue pixel at image[i][0] would be rgb_image +
i*(i_width*3) + 1.
*/
void
write_png(const char *file_name, png_uint_32 i_height, png_uint_32 i_width,
void *rgb_image, /*in*/ png_text *text_ptr, int i_text_count )
{
FILE *fp;
png_structp png_ptr;
png_infop info_ptr;
png_color_8 sig_bit;
png_bytep *row_pointers;
unsigned int i,j;
/* open the file */
fp = fopen(file_name, "wb");
if (fp == NULL)
return;
/* Create and initialize the png_struct with the desired error handler
* functions. If you want to use the default stderr and longjump method,
* you can supply NULL for the last three parameters. We also check that
* the library version is compatible with the one used at compile time,
* in case we are using dynamically linked libraries. REQUIRED.
*/
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp) NULL,
user_error_fn, user_warning_fn);
if (png_ptr == NULL)
{
fclose(fp);
return;
}
/* Allocate/initialize the image information data. REQUIRED */
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL)
{
fclose(fp);
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return;
}
/* Set error handling. REQUIRED if you aren't supplying your own
* error handling functions in the png_create_write_struct() call.
*/
if (setjmp(png_ptr->jmpbuf))
{
/* If we get here, we had a problem writing the file */
fclose(fp);
png_destroy_write_struct(&png_ptr, (png_infopp) &info_ptr);
return;
}
/* Set up the output control using standard C streams. This
is required. */
png_init_io(png_ptr, fp);
/* Set the image information here. i_width and i_height are up to 2^31,
* bit_depth is one of 1, 2, 4, 8, or 16, but valid values also depend on
* the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY,
* PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB,
* or PNG_COLOR_TYPE_RGB_ALPHA. interlace is either PNG_INTERLACE_NONE or
* PNG_INTERLACE_ADAM7, and the compression_type and filter_type MUST
* currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. REQUIRED
*/
png_set_IHDR(png_ptr, info_ptr, i_width, i_height, 8, PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
PNG_FILTER_TYPE_BASE);
/* For color images: */
sig_bit.red = 8;
sig_bit.green = 8;
sig_bit.blue = 8;
if (text_ptr)
png_set_text(png_ptr, info_ptr, text_ptr, i_text_count);
/* Write the file header information. REQUIRED */
png_write_info(png_ptr, info_ptr);
/* Once we write out the header, the compression type on the text
* chunks gets changed to PNG_TEXT_COMPRESSION_NONE_WR or
* PNG_TEXT_COMPRESSION_zTXt_WR, so it doesn't get written out again
* at the end.
*/
/* Shift the pixels up to a legal bit depth and fill in
* as appropriate to correctly scale the image.
*/
png_set_shift(png_ptr, &sig_bit);
/* pack pixels into bytes */
png_set_packing(png_ptr);
row_pointers = png_malloc(png_ptr, i_height*sizeof(png_bytep *));
for (i=0, j=0; i<i_height; i++, j+=i_width*3) {
row_pointers[i] = rgb_image + j;
}
png_set_rows (png_ptr, info_ptr, row_pointers);
png_write_image(png_ptr, row_pointers);
/* You can write optional chunks like tEXt, zTXt, and tIME at the end
* as well.
*/
/* It is REQUIRED to call this to finish writing the rest of the file */
png_write_end(png_ptr, info_ptr);
/* if you allocated any text comments, free them here */
/* free image data if allocated. */
/* clean up after the write, and free any memory allocated */
png_destroy_info_struct(png_ptr, &info_ptr);
/* clean up after the write, and free any memory allocated */
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
fclose(fp);
return;
}
#ifdef STANDALONE
int
main(int argc, char **argv)
{
char image_data[3*16 * 3*16 * 3];
int i,j,k,l,m;
char r,g,b,t, or,og,ob;
or=0x00; og=0xFF; ob=0x0;
m=0;
for (i=0; i<3; i++) {
t=or; or=og; og=ob; ob=t;
for (j=0; j<16; j++) {
r=or; g=og; b=ob;
for (k=0; k<3; k++) {
for (l=0; l<16; l++) {
image_data[m++]=r;
image_data[m++]=g;
image_data[m++]=b;
}
t=r; r=g; g=b; b=t;
}
}
}
write_png("/tmp/pngtest.png", 3*16, 3*16, (void *) image_data) ;
return 0;
}
#endif /*STANDALONE*/
#endif /*HAVE_LIBPNG*/
modules/codec/ogt/write_png.h 0 → 100644
View file @ f78730a8
/*****************************************************************************
* Dump an Image to a Portable Network Graphics (PNG) file
****************************************************************************
Copyright (C) 2004 VideoLAN
Author: Rocky Bernstein
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.
*****************************************************************************/
#include <png.h>
/*
Dump an image to a Portable Network Graphics (PNG) file. File_name
is where the file goes, i_height and i_width are the height and
width in pixels of the image. The data for the image is stored as a
linear array RGB pixel entries: one byte for each of red, green,
and blue component. Thus row[i] will begin at rgb_image +
i*(i_width*3) and the blue pixel at image[i][0] would be rgb_image
+ i*(i_width*3) + 1.
text_ptr contains comments that can be written to the image. It can
be null. i_text_count is the number of entries in text_ptr.
*/
void write_png(const char *file_name, png_uint_32 i_height,
png_uint_32 i_width, void *rgb_image,
/*in*/ png_text *text_ptr, int i_text_count );
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