gstreamer/ext/jpeg/gstjpegenc.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstjpegenc.h"
#include <gst/video/video.h>
/* elementfactory information */
GstElementDetails gst_jpegenc_details = {
"JPEG image encoder",
"Codec/Encoder/Image",
"Encode images in JPEG format",
"Wim Taymans <wim.taymans@tvd.be>",
};
GST_DEBUG_CATEGORY (jpegenc_debug);
#define GST_CAT_DEFAULT jpegenc_debug
#define JPEG_DEFAULT_QUALITY 85
/* These macros are adapted from videotestsrc.c
* and/or gst-plugins/gst/games/gstvideoimage.c */
#define ROUND_UP_2(x) (((x)+1)&~1)
#define ROUND_UP_4(x) (((x)+3)&~3)
#define ROUND_UP_8(x) (((x)+7)&~7)
/* I420 */
#define I420_Y_ROWSTRIDE(width) (ROUND_UP_4(width))
#define I420_U_ROWSTRIDE(width) (ROUND_UP_8(width)/2)
#define I420_V_ROWSTRIDE(width) ((ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2)
#define I420_Y_OFFSET(w,h) (0)
#define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*ROUND_UP_2(h)))
#define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
#define I420_SIZE(w,h) (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
/* JpegEnc signals and args */
enum
{
FRAME_ENCODED,
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_QUALITY,
ARG_SMOOTHING
/* FILL ME */
};
static void gst_jpegenc_base_init (gpointer g_class);
static void gst_jpegenc_class_init (GstJpegEnc * klass);
static void gst_jpegenc_init (GstJpegEnc * jpegenc);
static void gst_jpegenc_finalize (GObject * object);
static GstFlowReturn gst_jpegenc_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_jpegenc_getcaps (GstPad * pad);
static void gst_jpegenc_resync (GstJpegEnc * jpegenc);
static void gst_jpegenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_jpegenc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_jpegenc_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
static guint gst_jpegenc_signals[LAST_SIGNAL] = { 0 };
GType
gst_jpegenc_get_type (void)
{
static GType jpegenc_type = 0;
if (!jpegenc_type) {
static const GTypeInfo jpegenc_info = {
sizeof (GstJpegEnc),
(GBaseInitFunc) gst_jpegenc_base_init,
NULL,
(GClassInitFunc) gst_jpegenc_class_init,
NULL,
NULL,
sizeof (GstJpegEnc),
0,
(GInstanceInitFunc) gst_jpegenc_init,
};
jpegenc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstJpegEnc", &jpegenc_info,
0);
}
return jpegenc_type;
}
static GstStaticPadTemplate gst_jpegenc_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GstStaticPadTemplate gst_jpegenc_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/jpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], " "framerate = (double) [ 1, MAX ]")
);
static void
gst_jpegenc_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_jpegenc_sink_pad_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_jpegenc_src_pad_template));
gst_element_class_set_details (element_class, &gst_jpegenc_details);
}
static void
gst_jpegenc_class_init (GstJpegEnc * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gst_jpegenc_signals[FRAME_ENCODED] =
g_signal_new ("frame-encoded", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstJpegEncClass, frame_encoded), NULL,
NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gobject_class->set_property = gst_jpegenc_set_property;
gobject_class->get_property = gst_jpegenc_get_property;
g_object_class_install_property (gobject_class, ARG_QUALITY,
g_param_spec_int ("quality", "Quality", "Quality of encoding",
0, 100, JPEG_DEFAULT_QUALITY, G_PARAM_READWRITE));
#if 0
/* disabled, since it doesn't seem to work */
g_object_class_install_property (gobject_class, ARG_SMOOTHING,
g_param_spec_int ("smoothing", "Smoothing", "Smoothing factor",
0, 100, 0, G_PARAM_READWRITE));
#endif
gstelement_class->change_state = gst_jpegenc_change_state;
gobject_class->finalize = gst_jpegenc_finalize;
GST_DEBUG_CATEGORY_INIT (jpegenc_debug, "jpegenc", 0,
"JPEG encoding element");
}
static void
gst_jpegenc_init_destination (j_compress_ptr cinfo)
{
GST_DEBUG ("gst_jpegenc_chain: init_destination");
}
static gboolean
gst_jpegenc_flush_destination (j_compress_ptr cinfo)
{
GST_DEBUG ("gst_jpegenc_chain: flush_destination: buffer too small !!!");
return TRUE;
}
static void
gst_jpegenc_term_destination (j_compress_ptr cinfo)
{
GST_DEBUG ("gst_jpegenc_chain: term_source");
}
static void
gst_jpegenc_init (GstJpegEnc * jpegenc)
{
/* create the sink and src pads */
jpegenc->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_jpegenc_sink_pad_template), "sink");
gst_pad_set_chain_function (jpegenc->sinkpad, gst_jpegenc_chain);
gst_pad_set_getcaps_function (jpegenc->sinkpad, gst_jpegenc_getcaps);
gst_pad_set_setcaps_function (jpegenc->sinkpad, gst_jpegenc_setcaps);
gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->sinkpad);
jpegenc->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_jpegenc_src_pad_template), "src");
gst_pad_set_getcaps_function (jpegenc->sinkpad, gst_jpegenc_getcaps);
/*gst_pad_set_setcaps_function (jpegenc->sinkpad, gst_jpegenc_setcaps); */
gst_pad_use_fixed_caps (jpegenc->sinkpad);
gst_element_add_pad (GST_ELEMENT (jpegenc), jpegenc->srcpad);
/* reset the initial video state */
jpegenc->width = -1;
jpegenc->height = -1;
/* setup jpeglib */
memset (&jpegenc->cinfo, 0, sizeof (jpegenc->cinfo));
memset (&jpegenc->jerr, 0, sizeof (jpegenc->jerr));
jpegenc->cinfo.err = jpeg_std_error (&jpegenc->jerr);
jpeg_create_compress (&jpegenc->cinfo);
jpegenc->jdest.init_destination = gst_jpegenc_init_destination;
jpegenc->jdest.empty_output_buffer = gst_jpegenc_flush_destination;
jpegenc->jdest.term_destination = gst_jpegenc_term_destination;
jpegenc->cinfo.dest = &jpegenc->jdest;
jpegenc->quality = JPEG_DEFAULT_QUALITY;
jpegenc->smoothing = 0;
}
static void
gst_jpegenc_finalize (GObject * object)
{
GstJpegEnc *filter = GST_JPEGENC (object);
jpeg_destroy_compress (&filter->cinfo);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_jpegenc_getcaps (GstPad * pad)
{
GstJpegEnc *jpegenc = GST_JPEGENC (gst_pad_get_parent (pad));
GstPad *otherpad;
GstCaps *caps;
const char *name;
int i;
GstStructure *structure = NULL;
/* we want to proxy properties like width, height and framerate from the
other end of the element */
otherpad = (pad == jpegenc->srcpad) ? jpegenc->sinkpad : jpegenc->srcpad;
caps = gst_pad_get_allowed_caps (otherpad);
if (pad == jpegenc->srcpad) {
name = "image/jpeg";
} else {
name = "video/x-raw-yuv";
}
for (i = 0; i < gst_caps_get_size (caps); i++) {
structure = gst_caps_get_structure (caps, i);
gst_structure_set_name (structure, name);
gst_structure_remove_field (structure, "format");
/* ... but for the sink pad, we only do I420 anyway, so add that */
if (pad == jpegenc->sinkpad) {
gst_structure_set (structure, "format", GST_TYPE_FOURCC,
GST_STR_FOURCC ("I420"), NULL);
}
}
return caps;
}
static gboolean
gst_jpegenc_setcaps (GstPad * pad, GstCaps * caps)
{
GstJpegEnc *jpegenc = GST_JPEGENC (gst_pad_get_parent (pad));
GstStructure *structure;
GstCaps *othercaps;
GstPad *otherpad;
gboolean ret;
otherpad = (pad == jpegenc->srcpad) ? jpegenc->sinkpad : jpegenc->srcpad;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_double (structure, "framerate", &jpegenc->fps);
gst_structure_get_int (structure, "width", &jpegenc->width);
gst_structure_get_int (structure, "height", &jpegenc->height);
othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
gst_caps_set_simple (othercaps,
"width", G_TYPE_INT, jpegenc->width,
"height", G_TYPE_INT, jpegenc->height,
"framerate", G_TYPE_DOUBLE, jpegenc->fps, NULL);
ret = gst_pad_set_caps (jpegenc->srcpad, othercaps);
gst_caps_unref (othercaps);
if (GST_PAD_LINK_SUCCESSFUL (ret)) {
gst_jpegenc_resync (jpegenc);
}
return ret;
}
static void
gst_jpegenc_resync (GstJpegEnc * jpegenc)
{
gint width, height;
GST_DEBUG ("gst_jpegenc_resync: resync");
jpegenc->cinfo.image_width = width = jpegenc->width;
jpegenc->cinfo.image_height = height = jpegenc->height;
jpegenc->cinfo.input_components = 3;
GST_DEBUG ("gst_jpegenc_resync: wdith %d, height %d", width, height);
jpeg_set_defaults (&jpegenc->cinfo);
jpegenc->cinfo.dct_method = JDCT_FASTEST;
/*jpegenc->cinfo.dct_method = JDCT_DEFAULT; */
/*jpegenc->cinfo.smoothing_factor = jpegenc->smoothing; */
jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE);
#if 0
switch (jpegenc->format) {
case GST_COLORSPACE_RGB24:
jpegenc->bufsize = jpegenc->width * jpegenc->height * 3;
GST_DEBUG ("gst_jpegenc_resync: setting format to RGB24");
jpegenc->cinfo.in_color_space = JCS_RGB;
jpegenc->cinfo.raw_data_in = FALSE;
break;
case GST_COLORSPACE_YUV420P:
#endif
jpegenc->bufsize = I420_SIZE (jpegenc->width, jpegenc->height);
jpegenc->cinfo.raw_data_in = TRUE;
jpegenc->cinfo.in_color_space = JCS_YCbCr;
GST_DEBUG ("gst_jpegenc_resync: setting format to YUV420P");
jpegenc->cinfo.comp_info[0].h_samp_factor = 2;
jpegenc->cinfo.comp_info[0].v_samp_factor = 2;
jpegenc->cinfo.comp_info[1].h_samp_factor = 1;
jpegenc->cinfo.comp_info[1].v_samp_factor = 1;
jpegenc->cinfo.comp_info[2].h_samp_factor = 1;
jpegenc->cinfo.comp_info[2].v_samp_factor = 1;
if (height != -1) {
jpegenc->line[0] =
g_realloc (jpegenc->line[0], height * sizeof (char *));
jpegenc->line[1] =
g_realloc (jpegenc->line[1], height * sizeof (char *) / 2);
jpegenc->line[2] =
g_realloc (jpegenc->line[2], height * sizeof (char *) / 2);
}
GST_DEBUG ("gst_jpegenc_resync: setting format done");
#if 0
break;
default:
printf ("gst_jpegenc_resync: unsupported colorspace, using RGB\n");
jpegenc->bufsize = jpegenc->width * jpegenc->height * 3;
jpegenc->cinfo.in_color_space = JCS_RGB;
break;
}
#endif
jpeg_suppress_tables (&jpegenc->cinfo, TRUE);
//jpeg_suppress_tables(&jpegenc->cinfo, FALSE);
jpegenc->buffer = NULL;
GST_DEBUG ("gst_jpegenc_resync: resync done");
}
static GstFlowReturn
gst_jpegenc_chain (GstPad * pad, GstBuffer * buf)
{
GstJpegEnc *jpegenc;
guchar *data, *outdata;
gulong size, outsize;
GstBuffer *outbuf;
/* GstMeta *meta; */
guint height, width;
guchar *base[3];
gint i, j, k;
/*usleep(10000); */
jpegenc = GST_JPEGENC (GST_OBJECT_PARENT (pad));
data = GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
GST_DEBUG ("gst_jpegenc_chain: got buffer of %ld bytes in '%s'", size,
GST_OBJECT_NAME (jpegenc));
outbuf = gst_buffer_new ();
outsize = GST_BUFFER_SIZE (outbuf) = jpegenc->bufsize;
outdata = GST_BUFFER_DATA (outbuf) = g_malloc (outsize);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
width = jpegenc->width;
height = jpegenc->height;
base[0] = data + I420_Y_OFFSET (width, height);
base[1] = data + I420_U_OFFSET (width, height);
base[2] = data + I420_V_OFFSET (width, height);
jpegenc->jdest.next_output_byte = outdata;
jpegenc->jdest.free_in_buffer = outsize;
jpegenc->cinfo.smoothing_factor = jpegenc->smoothing;
jpeg_set_quality (&jpegenc->cinfo, jpegenc->quality, TRUE);
jpeg_start_compress (&jpegenc->cinfo, TRUE);
GST_DEBUG ("gst_jpegdec_chain: compressing");
for (i = 0; i < height; i += 2 * DCTSIZE) {
/*g_print ("next scanline: %d\n", jpegenc->cinfo.next_scanline); */
for (j = 0, k = 0; j < (2 * DCTSIZE); j += 2, k++) {
jpegenc->line[0][j] = base[0];
base[0] += I420_Y_ROWSTRIDE (width);
jpegenc->line[0][j + 1] = base[0];
base[0] += I420_Y_ROWSTRIDE (width);
jpegenc->line[1][k] = base[1];
base[1] += I420_U_ROWSTRIDE (width);
jpegenc->line[2][k] = base[2];
base[2] += I420_V_ROWSTRIDE (width);
}
jpeg_write_raw_data (&jpegenc->cinfo, jpegenc->line, 2 * DCTSIZE);
}
jpeg_finish_compress (&jpegenc->cinfo);
GST_DEBUG ("gst_jpegdec_chain: compressing done");
GST_BUFFER_SIZE (outbuf) =
(((outsize - jpegenc->jdest.free_in_buffer) + 3) & ~3);
gst_pad_push (jpegenc->srcpad, outbuf);
g_signal_emit (G_OBJECT (jpegenc), gst_jpegenc_signals[FRAME_ENCODED], 0);
/*gst_buffer_unref (buf); */
return GST_FLOW_OK;
}
static void
gst_jpegenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstJpegEnc *jpegenc;
g_return_if_fail (GST_IS_JPEGENC (object));
jpegenc = GST_JPEGENC (object);
switch (prop_id) {
case ARG_QUALITY:
jpegenc->quality = g_value_get_int (value);
break;
case ARG_SMOOTHING:
jpegenc->smoothing = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_jpegenc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstJpegEnc *jpegenc;
g_return_if_fail (GST_IS_JPEGENC (object));
jpegenc = GST_JPEGENC (object);
switch (prop_id) {
case ARG_QUALITY:
g_value_set_int (value, jpegenc->quality);
break;
case ARG_SMOOTHING:
g_value_set_int (value, jpegenc->smoothing);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_jpegenc_change_state (GstElement * element, GstStateChange transition)
{
GstJpegEnc *filter = GST_JPEGENC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
GST_DEBUG ("gst_jpegenc_change_state: setting line buffers");
filter->line[0] = NULL;
filter->line[1] = NULL;
filter->line[2] = NULL;
gst_jpegenc_resync (filter);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
g_free (filter->line[0]);
g_free (filter->line[1]);
g_free (filter->line[2]);
filter->line[0] = NULL;
filter->line[1] = NULL;
filter->line[2] = NULL;
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}