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Add jp2k plugin. Fixes #550657.

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Original commit message from CVS:
* configure.ac:
* ext/Makefile.am:
* ext/jp2k/Makefile.am:
* ext/jp2k/gstjasperdec.c: (gst_jasper_dec_base_init),
(gst_jasper_dec_class_init), (gst_jasper_dec_init),
(gst_jasper_dec_reset), (gst_jasper_dec_sink_setcaps),
(gst_jasper_dec_negotiate), (gst_jasper_dec_get_picture),
(gst_jasper_dec_chain), (gst_jasper_dec_set_property),
(gst_jasper_dec_get_property), (gst_jasper_dec_change_state),
(plugin_init):
* ext/jp2k/gstjasperdec.h:
Add jp2k plugin.  Fixes #550657.
This commit is contained in:
Mark Nauwelaerts 2008-09-09 17:56:10 +00:00
parent 7359989bdb
commit e262a72516
6 changed files with 841 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
ChangeLog
View file

@ -1,3 +1,18 @@
2008-09-09 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
* configure.ac:
* ext/Makefile.am:
* ext/jp2k/Makefile.am:
* ext/jp2k/gstjasperdec.c: (gst_jasper_dec_base_init),
(gst_jasper_dec_class_init), (gst_jasper_dec_init),
(gst_jasper_dec_reset), (gst_jasper_dec_sink_setcaps),
(gst_jasper_dec_negotiate), (gst_jasper_dec_get_picture),
(gst_jasper_dec_chain), (gst_jasper_dec_set_property),
(gst_jasper_dec_get_property), (gst_jasper_dec_change_state),
(plugin_init):
* ext/jp2k/gstjasperdec.h:
Add jp2k plugin. Fixes #550657.
2008-09-09 Edward Hervey <edward.hervey@collabora.co.uk>
* gst/mpegdemux/flumpegdemux.c: (plugin_init):

10
configure.ac
View file

@ -799,6 +799,14 @@ AG_GST_CHECK_FEATURE(JACK, Jack, jack, [
AC_SUBST(JACK_LIBS)
])
dnl *** jp2k ***
translit(dnm, m, l) AM_CONDITIONAL(USE_JP2K, true)
AG_GST_CHECK_FEATURE(JP2K, [jp2k], jp2kdec, [
AG_GST_CHECK_LIBHEADER(JP2K, jasper, jas_stream_fopen, , jasper/jasper.h,
JP2K_LIBS="-ljasper")
AC_SUBST(JP2K_LIBS)
])
dnl *** ladspa ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LADSPA, true)
AG_GST_CHECK_FEATURE(LADSPA, [ladspa], ladspa, [
@ -1296,6 +1304,7 @@ AM_CONDITIONAL(USE_FBDEV, false)
AM_CONDITIONAL(USE_GSM, false)
AM_CONDITIONAL(USE_IVORBIS, false)
AM_CONDITIONAL(USE_JACK, false)
AM_CONDITIONAL(USE_JP2K, false)
AM_CONDITIONAL(USE_LADSPA, false)
AM_CONDITIONAL(USE_LIBMMS, false)
AM_CONDITIONAL(USE_METADATA, false)
@ -1463,6 +1472,7 @@ ext/faad/Makefile
ext/gsm/Makefile
ext/ivorbis/Makefile
ext/jack/Makefile
ext/jp2k/Makefile
ext/ladspa/Makefile
ext/libmms/Makefile
ext/Makefile

8
ext/Makefile.am
View file

@ -130,6 +130,12 @@ else
JACK_DIR=
endif
if USE_JP2K
JP2K_DIR = jp2k
else
JP2K_DIR =
endif
if USE_LADSPA
LADSPA_DIR = ladspa
else
@ -329,6 +335,7 @@ SUBDIRS=\
$(HERMES_DIR) \
$(IVORBIS_DIR) \
$(JACK_DIR) \
$(JP2K_DIR) \
$(LADSPA_DIR) \
$(LCS_DIR) \
$(LIBFAME_DIR) \
@ -374,6 +381,7 @@ DIST_SUBDIRS = \
ivorbis \
ladspa \
jack \
jp2k \
libmms \
dts \
divx \

12
ext/jp2k/Makefile.am Normal file
View file

@ -0,0 +1,12 @@
plugin_LTLIBRARIES = libgstjp2k.la
libgstjp2k_la_SOURCES = gstjasperdec.c
libgstjp2k_la_CFLAGS = \
$(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) $(JP2K_CFLAGS)
libgstjp2k_la_LIBADD = \
$(GST_PLUGINS_BASE_LIBS) -lgstvideo-$(GST_MAJORMINOR) \
$(GST_LIBS) $(JP2K_LIBS)
libgstjp2k_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = \
gstjasperdec.h

708
ext/jp2k/gstjasperdec.c Normal file
View file

@ -0,0 +1,708 @@
/* GStreamer Jasper based j2k image decoder
* Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-jasperdec
*
* Decodes jpeg2000 images.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
#include <jasper/jasper.h>
#include "gstjasperdec.h"
GST_DEBUG_CATEGORY_STATIC (gst_jasper_dec_debug);
#define GST_CAT_DEFAULT gst_jasper_dec_debug
static const GstElementDetails plugin_details =
GST_ELEMENT_DETAILS ("Jasper JPEG2000 image decoder",
"Codec/Decoder/Image",
"Decodes JPEG2000 encoded images using jasper",
"Mark Nauwelaerts <mnauw@users.sf.net>");
enum
{
ARG_0,
};
static GstStaticPadTemplate gst_jasper_dec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/x-j2c, "
"framerate = " GST_VIDEO_FPS_RANGE ", "
"fields = (int) 1; " "image/jp2")
);
static GstStaticPadTemplate gst_jasper_dec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB "; " GST_VIDEO_CAPS_BGR "; "
GST_VIDEO_CAPS_RGBA "; " GST_VIDEO_CAPS_ARGB "; "
GST_VIDEO_CAPS_BGRA "; " GST_VIDEO_CAPS_ABGR "; "
GST_VIDEO_CAPS_RGBx "; " GST_VIDEO_CAPS_xRGB "; "
GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_xBGR "; "
GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV, Y41B, Y42B }"))
);
static void gst_jasper_dec_base_init (gpointer g_class);
static void gst_jasper_dec_class_init (GstJasperDecClass * klass);
static void gst_jasper_dec_init (GstJasperDec * filter,
GstJasperDecClass * klass);
static void gst_jasper_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_jasper_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_jasper_dec_reset (GstJasperDec * dec);
static GstStateChangeReturn gst_jasper_dec_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_jasper_dec_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_jasper_dec_chain (GstPad * pad, GstBuffer * buffer);
/* minor trick:
* keep original naming but use unique name here for a happy type system
*/
typedef GstJasperDec GstJp2kDec;
typedef GstJasperDecClass GstJp2kDecClass;
GST_BOILERPLATE (GstJp2kDec, gst_jasper_dec, GstElement, GST_TYPE_ELEMENT);
static void
gst_jasper_dec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jasper_dec_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jasper_dec_sink_template));
gst_element_class_set_details (element_class, &plugin_details);
}
/* initialize the plugin's class */
static void
gst_jasper_dec_class_init (GstJasperDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_jasper_dec_set_property;
gobject_class->get_property = gst_jasper_dec_get_property;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_jasper_dec_change_state);
}
static void
gst_jasper_dec_init (GstJasperDec * dec, GstJasperDecClass * klass)
{
dec->sinkpad =
gst_pad_new_from_static_template (&gst_jasper_dec_sink_template, "sink");
gst_pad_set_setcaps_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jasper_dec_sink_setcaps));
gst_pad_set_chain_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (gst_jasper_dec_chain));
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
dec->srcpad =
gst_pad_new_from_static_template (&gst_jasper_dec_src_template, "src");
gst_pad_use_fixed_caps (dec->srcpad);
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
dec->codec_data = NULL;
dec->mat = NULL;
gst_jasper_dec_reset (dec);
}
static void
gst_jasper_dec_reset (GstJasperDec * dec)
{
if (dec->codec_data)
gst_buffer_unref (dec->codec_data);
dec->codec_data = NULL;
if (dec->mat)
jas_matrix_destroy (dec->mat);
dec->mat = NULL;
dec->fmt = -1;
dec->clrspc = JAS_CLRSPC_UNKNOWN;
dec->format = GST_VIDEO_FORMAT_UNKNOWN;
}
static gboolean
gst_jasper_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstJasperDec *dec;
const GValue *framerate;
GstStructure *s;
const gchar *mimetype;
guint32 fourcc;
dec = GST_JASPER_DEC (GST_PAD_PARENT (pad));
s = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (s);
/* reset negotiation */
dec->fmt = -1;
dec->strip = 0;
dec->format = GST_VIDEO_FORMAT_UNKNOWN;
if (dec->codec_data) {
gst_buffer_unref (dec->codec_data);
dec->codec_data = NULL;
}
if (!strcmp (mimetype, "image/x-j2c")) {
const GValue *codec_data;
gint fields;
/* we only handle single field, packetized input */
if (gst_structure_get_value (s, "framerate") == NULL)
goto refuse_caps;
if (gst_structure_get_int (s, "fields", &fields) && fields != 1)
goto refuse_caps;
if (!gst_structure_get_fourcc (s, "fourcc", &fourcc))
goto refuse_caps;
switch (fourcc) {
case GST_MAKE_FOURCC ('s', 'R', 'G', 'B'):
dec->clrspc = JAS_CLRSPC_SRGB;
break;
case GST_MAKE_FOURCC ('s', 'Y', 'U', 'V'):
dec->clrspc = JAS_CLRSPC_SYCBCR;
break;
default:
goto refuse_caps;
break;
}
dec->fmt = jas_image_strtofmt ("jpc");
/* strip the j2c box stuff it is embedded in */
dec->strip = 8;
codec_data = gst_structure_get_value (s, "codec_data");
if (codec_data) {
dec->codec_data = gst_value_get_buffer (codec_data);
gst_buffer_ref (dec->codec_data);
}
} else if (!strcmp (mimetype, "image/jp2"))
dec->fmt = jas_image_strtofmt ("jp2");
if (dec->fmt < 0)
goto refuse_caps;
if ((framerate = gst_structure_get_value (s, "framerate")) != NULL) {
dec->framerate_numerator = gst_value_get_fraction_numerator (framerate);
dec->framerate_denominator = gst_value_get_fraction_denominator (framerate);
GST_DEBUG_OBJECT (dec, "got framerate of %d/%d fps => packetized mode",
dec->framerate_numerator, dec->framerate_denominator);
} else {
dec->framerate_numerator = 0;
dec->framerate_denominator = 1;
GST_DEBUG_OBJECT (dec, "no framerate, assuming single image");
}
return TRUE;
refuse_caps:
{
GST_WARNING_OBJECT (dec, "refused caps %" GST_PTR_FORMAT, caps);
gst_object_unref (dec);
return FALSE;
}
}
static gboolean
gst_jasper_dec_negotiate (GstJasperDec * dec, jas_image_t * image)
{
gint width, height, channels;
gint i, j;
gboolean negotiate = FALSE, ret = TRUE;
jas_clrspc_t clrspc;
GstCaps *allowed_caps, *caps;
width = jas_image_width (image);
height = jas_image_height (image);
channels = jas_image_numcmpts (image);
/* jp2c bitstream has no real colour space info (kept in container),
* so decoder may only pretend to know, where it really does not */
if (!jas_clrspc_isunknown (dec->clrspc)) {
clrspc = dec->clrspc;
GST_DEBUG_OBJECT (dec, "forcing container supplied colour space %d",
clrspc);
jas_image_setclrspc (image, clrspc);
} else
clrspc = jas_image_clrspc (image);
if (!width || !height || !channels || jas_clrspc_isunknown (clrspc))
goto fail_image;
if (dec->width != width || dec->height != height ||
dec->channels != channels || dec->clrspc != clrspc)
negotiate = TRUE;
if (channels != 3)
goto not_supported;
for (i = 0; i < channels; i++) {
gint cheight, cwidth, depth, sgnd;
cheight = jas_image_cmptheight (image, i);
cwidth = jas_image_cmptwidth (image, i);
depth = jas_image_cmptprec (image, i);
sgnd = jas_image_cmptsgnd (image, i);
GST_LOG_OBJECT (dec, "image component %d, %dx%d, depth %d, sgnd %d", i,
cwidth, cheight, depth, sgnd);
if (depth != 8 || sgnd)
goto not_supported;
if (dec->cheight[i] != cheight || dec->cwidth[i] != cwidth) {
dec->cheight[i] = cheight;
dec->cwidth[i] = cwidth;
negotiate = TRUE;
}
}
if (!negotiate && dec->format != GST_VIDEO_FORMAT_UNKNOWN)
goto done;
/* clear and refresh to new state */
ret = FALSE;
dec->format = GST_VIDEO_FORMAT_UNKNOWN;
dec->width = width;
dec->height = height;
dec->channels = channels;
/* retrieve allowed caps, and find the first one that reasonably maps
* to the parameters of the colourspace */
caps = gst_pad_get_allowed_caps (dec->srcpad);
if (!caps) {
GST_DEBUG_OBJECT (dec, "... but no peer, using template caps");
/* need to copy because get_allowed_caps returns a ref,
and get_pad_template_caps doesn't */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (dec->srcpad));
}
/* avoid lists of fourcc, etc */
allowed_caps = gst_caps_normalize (caps);
gst_caps_unref (caps);
caps = NULL;
GST_LOG_OBJECT (dec, "allowed source caps %" GST_PTR_FORMAT, allowed_caps);
for (i = 0; i < gst_caps_get_size (allowed_caps); i++) {
GstVideoFormat format;
gboolean ok;
if (caps)
gst_caps_unref (caps);
caps = gst_caps_copy_nth (allowed_caps, i);
/* sigh, ds and _parse_caps need fixed caps for parsing, fixate */
gst_pad_fixate_caps (dec->srcpad, caps);
GST_LOG_OBJECT (dec, "checking caps %" GST_PTR_FORMAT, caps);
if (!gst_video_format_parse_caps (caps, &format, NULL, NULL))
continue;
if (gst_video_format_is_rgb (format) &&
jas_clrspc_fam (clrspc) == JAS_CLRSPC_FAM_RGB) {
GST_DEBUG_OBJECT (dec, "trying RGB");
if ((dec->cmpt[0] = jas_image_getcmptbytype (image,
JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
(dec->cmpt[1] = jas_image_getcmptbytype (image,
JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
(dec->cmpt[2] = jas_image_getcmptbytype (image,
JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
GST_DEBUG_OBJECT (dec, "missing RGB color component");
continue;
}
} else if (gst_video_format_is_yuv (format) &&
jas_clrspc_fam (clrspc) == JAS_CLRSPC_FAM_YCBCR) {
GST_DEBUG_OBJECT (dec, "trying YUV");
if ((dec->cmpt[0] = jas_image_getcmptbytype (image,
JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_Y))) < 0 ||
(dec->cmpt[1] = jas_image_getcmptbytype (image,
JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_CB))) < 0 ||
(dec->cmpt[2] = jas_image_getcmptbytype (image,
JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_CR))) < 0) {
GST_DEBUG_OBJECT (dec, "missing YUV color component");
continue;
}
} else
continue;
/* match format with validity checks */
ok = TRUE;
for (j = 0; j < channels; j++) {
gint cmpt;
cmpt = dec->cmpt[j];
if (dec->cwidth[cmpt] != gst_video_format_get_component_width (format, j,
width) ||
dec->cheight[cmpt] != gst_video_format_get_component_height (format,
j, height))
ok = FALSE;
}
/* commit to this format */
if (ok) {
dec->format = format;
break;
}
}
if (caps)
gst_caps_unref (caps);
gst_caps_unref (allowed_caps);
if (dec->format != GST_VIDEO_FORMAT_UNKNOWN) {
/* cache some video format properties */
for (j = 0; j < channels; ++j) {
dec->offset[j] = gst_video_format_get_component_offset (dec->format, j,
dec->width, dec->height);
dec->inc[j] = gst_video_format_get_pixel_stride (dec->format, j);
dec->stride[j] = gst_video_format_get_row_stride (dec->format, j,
dec->width);
}
dec->image_size = gst_video_format_get_size (dec->format, width, height);
dec->alpha = gst_video_format_has_alpha (dec->format);
if (dec->mat)
jas_matrix_destroy (dec->mat);
dec->mat = jas_matrix_create (1, dec->width);
if (!dec->mat) {
dec->format = GST_VIDEO_FORMAT_UNKNOWN;
GST_DEBUG_OBJECT (dec, "failed to create helper buffer");
goto fail_image;
}
caps = gst_video_format_new_caps (dec->format, dec->width, dec->height,
dec->framerate_numerator, dec->framerate_denominator, 1, 1);
GST_DEBUG_OBJECT (dec, "Set format to %d, size to %dx%d", dec->format,
dec->width, dec->height);
ret = gst_pad_set_caps (dec->srcpad, caps);
gst_caps_unref (caps);
}
done:
return ret;
/* ERRORS */
fail_image:
{
GST_DEBUG_OBJECT (dec, "Failed to process decoded image.");
ret = FALSE;
goto done;
}
not_supported:
{
GST_DEBUG_OBJECT (dec, "Decoded image has unsupported colour space.");
ret = FALSE;
goto done;
}
}
static GstFlowReturn
gst_jasper_dec_get_picture (GstJasperDec * dec, guint8 * data,
guint size, GstBuffer ** outbuf)
{
GstFlowReturn ret = GST_FLOW_OK;
jas_stream_t *stream = NULL;
jas_image_t *image = NULL;
gint i;
g_return_val_if_fail (outbuf != NULL, GST_FLOW_ERROR);
*outbuf = NULL;
if (!(stream = jas_stream_memopen ((gpointer) data, size)))
goto fail_stream;
if (!(image = jas_image_decode (stream, dec->fmt, "")))
goto fail_decode;
if (!gst_jasper_dec_negotiate (dec, image))
goto fail_negotiate;
ret = gst_pad_alloc_buffer_and_set_caps (dec->srcpad,
GST_BUFFER_OFFSET_NONE,
dec->image_size, GST_PAD_CAPS (dec->srcpad), outbuf);
if (ret != GST_FLOW_OK)
goto no_buffer;
if (dec->alpha)
memset (GST_BUFFER_DATA (*outbuf), 0xff, dec->image_size);
for (i = 0; i < dec->channels; ++i) {
gint x, y, cwidth, cheight, inc, stride, cmpt;
guint8 *row_pix, *out_pix;
inc = dec->inc[i];
stride = dec->stride[i];
cmpt = dec->cmpt[i];
cheight = dec->cheight[cmpt];
cwidth = dec->cwidth[cmpt];
GST_DEBUG_OBJECT (dec,
"retrieve component %d<=%d, size %dx%d, offset %d, inc %d, stride %d",
i, cmpt, cwidth, cheight, dec->offset[i], inc, stride);
out_pix = GST_BUFFER_DATA (*outbuf) + dec->offset[i];
for (y = 0; y < cheight; y++) {
row_pix = out_pix;
if (jas_image_readcmpt (image, i, 0, y, cwidth, 1, dec->mat))
goto fail_image;
for (x = 0; x < cwidth; x++) {
*out_pix = (guint8) jas_matrix_get (dec->mat, 0, x);
out_pix += inc;
}
out_pix = row_pix + stride;
}
}
GST_LOG_OBJECT (dec, "all components retrieved");
done:
if (image)
jas_image_destroy (image);
if (stream)
jas_stream_close (stream);
return ret;
/* ERRORS */
fail_stream:
{
GST_DEBUG_OBJECT (dec, "Failed to create inputstream.");
goto fail;
}
fail_decode:
{
GST_DEBUG_OBJECT (dec, "Failed to decode image.");
goto fail;
}
fail_image:
{
GST_DEBUG_OBJECT (dec, "Failed to process decoded image.");
goto fail;
}
fail:
{
if (*outbuf)
gst_buffer_unref (*outbuf);
*outbuf = NULL;
GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), (NULL));
ret = GST_FLOW_ERROR;
goto done;
}
no_buffer:
{
GST_DEBUG_OBJECT (dec, "Failed to create outbuffer - %s",
gst_flow_get_name (ret));
goto done;
}
fail_negotiate:
{
GST_DEBUG_OBJECT (dec, "Failed to determine output caps.");
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
static GstFlowReturn
gst_jasper_dec_chain (GstPad * pad, GstBuffer * buf)
{
GstJasperDec *dec;
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *outbuf = NULL;
guint8 *data;
guint size;
gboolean discont = FALSE;
dec = GST_JASPER_DEC (gst_pad_get_parent (pad));
if (dec->fmt < 0)
goto not_negotiated;
GST_LOG_OBJECT (dec, "buffer with ts: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
discont = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT);
/* strip possible prefix */
if (dec->strip) {
GstBuffer *tmp;
tmp = gst_buffer_create_sub (buf, dec->strip,
GST_BUFFER_SIZE (buf) - dec->strip);
gst_buffer_copy_metadata (tmp, buf, GST_BUFFER_COPY_TIMESTAMPS);
gst_buffer_unref (buf);
buf = tmp;
}
/* preprend possible codec_data */
if (dec->codec_data) {
GstBuffer *tmp;
tmp = gst_buffer_merge (dec->codec_data, buf);
gst_buffer_copy_metadata (tmp, buf, GST_BUFFER_COPY_TIMESTAMPS);
gst_buffer_unref (buf);
buf = tmp;
}
/* now really feed the data to decoder */
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
ret = gst_jasper_dec_get_picture (dec, data, size, &outbuf);
if (outbuf) {
gst_buffer_copy_metadata (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS);
if (discont)
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
}
if (ret == GST_FLOW_OK && outbuf)
ret = gst_pad_push (dec->srcpad, outbuf);
done:
gst_buffer_unref (buf);
gst_object_unref (dec);
return ret;
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (dec, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before chain function"));
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
static void
gst_jasper_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstJasperDec *filter;
filter = GST_JASPER_DEC (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_jasper_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstJasperDec *filter;
filter = GST_JASPER_DEC (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_jasper_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstJasperDec *dec = GST_JASPER_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (jas_init ())
goto fail_init;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_jasper_dec_reset (dec);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
jas_cleanup ();
break;
default:
break;
}
return ret;
/* ERRORS */
fail_init:
{
GST_ELEMENT_ERROR (dec, LIBRARY, INIT, (NULL), (NULL));
return GST_STATE_CHANGE_FAILURE;
}
}
/* entry point to initialize the plug-in
* initialize the plug-in itself
* register the element factories and pad templates
* register the features
*/
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_jasper_dec_debug, "jp2kdec", 0,
"Jasper JPEG2000 decoder");
if (!gst_element_register (plugin, "jp2kdec", GST_RANK_MARGINAL,
GST_TYPE_JASPER_DEC))
return FALSE;
/* plugin initialisation succeeded */
return TRUE;
}
/* this is the structure that gst-register looks for
* so keep the name plugin_desc, or you cannot get your plug-in registered */
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"jp2k",
"Jasper-based JPEG2000 image decoder",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

88
ext/jp2k/gstjasperdec.h Normal file
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/* GStreamer Jasper based j2k image decoder
* Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_JASPER_DEC_H__
#define __GST_JASPER_DEC_H__
#include <gst/gst.h>
G_BEGIN_DECLS
/* #define's don't like whitespacey bits */
#define GST_TYPE_JASPER_DEC \
(gst_jasper_dec_get_type())
#define GST_JASPER_DEC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_JASPER_DEC,GstJasperDec))
#define GST_JASPER_DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_JASPER_DEC,GstJasperDecClass))
#define GST_IS_JASPER_DEC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JASPER_DEC))
#define GST_IS_JASPER_DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_JASPER_DEC))
typedef struct _GstJasperDec GstJasperDec;
typedef struct _GstJasperDecClass GstJasperDecClass;
#define GST_JASPER_DEC_MAX_COMPONENT 4
struct _GstJasperDec
{
GstElement element;
GstPad *sinkpad, *srcpad;
GstBuffer *codec_data;
/* jasper image fmt */
gint fmt;
jas_clrspc_t clrspc;
gint strip;
/* stream/image properties */
GstVideoFormat format;
gint width;
gint height;
gint channels;
guint image_size;
gint stride[GST_JASPER_DEC_MAX_COMPONENT];
gint offset[GST_JASPER_DEC_MAX_COMPONENT];
gint inc[GST_JASPER_DEC_MAX_COMPONENT];
gboolean alpha;
jas_matrix_t *mat;
/* image cmpt indexed */
gint cwidth[GST_JASPER_DEC_MAX_COMPONENT];
gint cheight[GST_JASPER_DEC_MAX_COMPONENT];
/* standard video_format indexed */
gint cmpt[GST_JASPER_DEC_MAX_COMPONENT];
gint framerate_numerator;
gint framerate_denominator;
};
struct _GstJasperDecClass
{
GstElementClass parent_class;
};
static GType gst_jasper_dec_get_type (void);
G_END_DECLS
#endif /* __GST_JASPER_DEC_H__ */