[vlc-devel] [PATCH 2/2] bpg: add libbpg decoder
Tristan Matthews
tmatth at videolan.org
Tue Jan 6 02:51:58 CET 2015
---
configure.ac | 11 +++
include/vlc_fourcc.h | 1 +
modules/codec/Makefile.am | 6 ++
modules/codec/bpg.c | 187 ++++++++++++++++++++++++++++++++++++++++++++++
modules/demux/image.c | 4 +
src/misc/fourcc.c | 3 +
src/misc/image.c | 2 +
7 files changed, 214 insertions(+)
create mode 100644 modules/codec/bpg.c
diff --git a/configure.ac b/configure.ac
index 55a64ba..bca8081 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2715,6 +2715,17 @@ AC_CHECK_HEADERS(jpeglib.h, [
])
dnl
+dnl BPG decoder module
+dnl
+AC_ARG_ENABLE(bpg,
+ [ --enable-bpg BPG support (default disabled)])
+AS_IF([test "${enable_bpg}" != "no"], [
+AC_CHECK_HEADERS(libbpg.h, [
+ VLC_ADD_PLUGIN([bpg])
+ ])
+])
+
+dnl
dnl H262 encoder plugin (lib262)
dnl
AC_ARG_ENABLE(x262,
diff --git a/include/vlc_fourcc.h b/include/vlc_fourcc.h
index 70b35d6..5f4f8f9 100644
--- a/include/vlc_fourcc.h
+++ b/include/vlc_fourcc.h
@@ -334,6 +334,7 @@
#define VLC_CODEC_PGMYUV VLC_FOURCC('p','g','m','y')
#define VLC_CODEC_PAM VLC_FOURCC('p','a','m',' ')
#define VLC_CODEC_JPEG VLC_FOURCC('j','p','e','g')
+#define VLC_CODEC_BPG VLC_FOURCC('B','P','G',0xFB)
#define VLC_CODEC_JPEGLS VLC_FOURCC('M','J','L','S')
#define VLC_CODEC_BMP VLC_FOURCC('b','m','p',' ')
#define VLC_CODEC_TIFF VLC_FOURCC('t','i','f','f')
diff --git a/modules/codec/Makefile.am b/modules/codec/Makefile.am
index e26114b..ebdbf78 100644
--- a/modules/codec/Makefile.am
+++ b/modules/codec/Makefile.am
@@ -121,6 +121,12 @@ libjpeg_plugin_la_LIBADD = -ljpeg
EXTRA_LTLIBRARIES += libjpeg_plugin.la
codec_LTLIBRARIES += $(LTLIBjpeg)
+libbpg_plugin_la_SOURCES = codec/bpg.c
+libbpg_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(codecdir)'
+libbpg_plugin_la_LIBADD = -lbpg
+EXTRA_LTLIBRARIES += libbpg_plugin.la
+codec_LTLIBRARIES += $(LTLIBbpg)
+
libsvgdec_plugin_la_SOURCES = codec/svg.c
libsvgdec_plugin_la_CFLAGS = $(AM_CLAGS) $(CFLAGS_svgdec)
libsvgdec_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(codecdir)' $(LDFLAGS_svg)
diff --git a/modules/codec/bpg.c b/modules/codec/bpg.c
new file mode 100644
index 0000000..52b4bec
--- /dev/null
+++ b/modules/codec/bpg.c
@@ -0,0 +1,187 @@
+/*****************************************************************************
+ * bpg.c: bpg decoder module using libbpg.
+ *****************************************************************************
+ * Copyright (C) 2015 VLC authors and VideoLAN
+ *
+ * Author: Tristan Matthews <tmatth at videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_codec.h>
+#include <libbpg.h>
+
+struct decoder_sys_t
+{
+ struct BPGDecoderContext *p_bpg;
+};
+
+static int OpenDecoder(vlc_object_t *);
+static void CloseDecoder(vlc_object_t *);
+
+static picture_t *DecodeBlock(decoder_t *, block_t **);
+
+/*
+ * Module descriptor
+ */
+vlc_module_begin()
+ set_category( CAT_INPUT )
+ set_subcategory( SUBCAT_INPUT_VCODEC )
+ /* decoder main module */
+ set_description( N_("BPG image decoder") )
+ set_capability( "decoder", 1000 )
+ set_callbacks( OpenDecoder, CloseDecoder )
+ add_shortcut( "bpg" )
+vlc_module_end()
+
+
+static int OpenDecoder(vlc_object_t *p_this)
+{
+ decoder_t *p_dec = (decoder_t *)p_this;
+
+ if( p_dec->fmt_in.i_codec != VLC_CODEC_BPG )
+ {
+ return VLC_EGENERIC;
+ }
+
+ decoder_sys_t *p_sys = malloc( sizeof( decoder_sys_t ) );
+ if( p_sys == NULL )
+ {
+ return VLC_ENOMEM;
+ }
+
+ p_dec->p_sys = p_sys;
+
+ p_sys->p_bpg = bpg_decoder_open();
+ if( !p_sys->p_bpg )
+ {
+ return VLC_EGENERIC;
+ }
+
+ /* Set output properties */
+ p_dec->fmt_out.i_cat = VIDEO_ES;
+
+ /* Set callbacks */
+ p_dec->pf_decode_video = DecodeBlock;
+
+ return VLC_SUCCESS;
+}
+
+/*
+ * This function must be fed with a complete compressed frame.
+ */
+static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_block;
+ picture_t *p_pic = 0;
+ BPGImageInfo img_info;
+
+ if( !pp_block || !*pp_block )
+ {
+ return NULL;
+ }
+
+ p_block = *pp_block;
+
+ if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
+ {
+ block_Release(p_block);
+ *pp_block = NULL;
+ return NULL;
+ }
+
+ /* Decode picture */
+
+ if( bpg_decoder_decode( p_sys->p_bpg,
+ p_block->p_buffer,
+ p_block->i_buffer ) < 0 )
+ {
+ msg_Err( p_dec, "Could not decode block" );
+ goto error;
+ }
+
+ if( bpg_decoder_get_info( p_sys->p_bpg, &img_info ) )
+ {
+ msg_Err( p_dec, "Could not get info for decoder" );
+ goto error;
+ }
+
+ if( bpg_decoder_start( p_sys->p_bpg, BPG_OUTPUT_FORMAT_RGB24 ) )
+ {
+ msg_Err( p_dec, "Could not start decoder" );
+ goto error;
+ }
+
+ /* Set output properties */
+ p_dec->fmt_out.i_codec = VLC_CODEC_RGB24;
+ p_dec->fmt_out.video.i_visible_width = p_dec->fmt_out.video.i_width = img_info.width;
+ p_dec->fmt_out.video.i_visible_height = p_dec->fmt_out.video.i_height = img_info.height;
+ p_dec->fmt_out.video.i_sar_num = 1;
+ p_dec->fmt_out.video.i_sar_den = 1;
+ p_dec->fmt_out.video.i_rmask = 0x000000ff;
+ p_dec->fmt_out.video.i_gmask = 0x0000ff00;
+ p_dec->fmt_out.video.i_bmask = 0x00ff0000;
+
+ /* Get a new picture */
+ p_pic = decoder_NewPicture( p_dec );
+ if( !p_pic )
+ {
+ goto error;
+ }
+
+ const int img_height = img_info.height;
+ for (int i = 0; i < img_height; i++)
+ {
+ if( bpg_decoder_get_line( p_sys->p_bpg,
+ p_pic->p->p_pixels + p_pic->p->i_pitch * i )
+ < 0 )
+ {
+ msg_Err( p_dec, "Could not decode line" );
+ goto error;
+ }
+ }
+
+ p_pic->date = p_block->i_pts > VLC_TS_INVALID ? p_block->i_pts : p_block->i_dts;
+
+ block_Release( p_block );
+ *pp_block = NULL;
+
+ return p_pic;
+
+error:
+
+ block_Release( p_block );
+ *pp_block = NULL;
+
+ return NULL;
+}
+
+static void CloseDecoder( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t *)p_this;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ if( p_sys->p_bpg )
+ bpg_decoder_close( p_sys->p_bpg );
+
+ free( p_sys );
+}
diff --git a/modules/demux/image.c b/modules/demux/image.c
index 5b56913..d91791f 100644
--- a/modules/demux/image.c
+++ b/modules/demux/image.c
@@ -585,6 +585,10 @@ static const image_format_t formats[] = {
{ .codec = VLC_CODEC_JPEG,
.detect = IsExif,
},
+ { .codec = VLC_CODEC_BPG,
+ .marker_size = 4,
+ .marker = { 'B', 'P', 'G', 0xFB },
+ },
{ .codec = VLC_CODEC_SVG,
.detect = IsSVG,
},
diff --git a/src/misc/fourcc.c b/src/misc/fourcc.c
index 1682870..13e9b40 100644
--- a/src/misc/fourcc.c
+++ b/src/misc/fourcc.c
@@ -958,6 +958,9 @@ static const staticentry_t p_list_video[] = {
A("jpeg"),
A("JPEG"),
+ B(VLC_CODEC_BPG, "BPG Image"),
+ A("BPG "),
+
B(VLC_CODEC_BMP, "BMP Image"),
A("bmp "),
diff --git a/src/misc/image.c b/src/misc/image.c
index 906470a..02db3cb 100644
--- a/src/misc/image.c
+++ b/src/misc/image.c
@@ -503,6 +503,7 @@ static const struct
{ VLC_CODEC_JPEG, "jpeg" },
{ VLC_CODEC_JPEG, "jpg" },
{ VLC_CODEC_JPEGLS, "ljpg" },
+ { VLC_CODEC_BPG, "bpg" },
{ VLC_CODEC_PNG, "png" },
{ VLC_CODEC_PGM, "pgm" },
{ VLC_CODEC_PGMYUV, "pgmyuv" },
@@ -567,6 +568,7 @@ static const struct
{ VLC_CODEC_PNM, "image/x-portable-pixmap" },
{ VLC_CODEC_GIF, "image/gif" },
{ VLC_CODEC_JPEG, "image/jpeg" },
+ { VLC_CODEC_BPG, "image/bpg" },
{ VLC_CODEC_PCX, "image/pcx" },
{ VLC_CODEC_PNG, "image/png" },
{ VLC_CODEC_SVG, "image/svg+xml" },
--
2.1.4
More information about the vlc-devel
mailing list