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webenc: Add WebP image encoder

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https://bugzilla.gnome.org/show_bug.cgi?id=733087
This commit is contained in:
Sreerenj Balachandran 2014-08-11 16:01:32 +03:00 committed by Sebastian Dröge
parent 4482ce3423
commit b9105792da
4 changed files with 483 additions and 2 deletions
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5
ext/webp/Makefile.am
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@ -1,9 +1,10 @@
plugin_LTLIBRARIES = libgstwebp.la
noinst_HEADERS = gstwebpdec.h
noinst_HEADERS = gstwebpdec.h gstwebpenc.h
libgstwebp_la_SOURCES = gstwebp.c \
gstwebpdec.c
gstwebpdec.c \
gstwebpenc.c
libgstwebp_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS) $(WEBP_CFLAGS)
libgstwebp_la_LIBADD = \

2
ext/webp/gstwebp.c
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@ -26,11 +26,13 @@
#include <gst/gst.h>
#include "gstwebpdec.h"
#include "gstwebpenc.h"
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_webp_dec_register (plugin);
gst_webp_enc_register (plugin);
return TRUE;
}

402
ext/webp/gstwebpenc.c Normal file
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@ -0,0 +1,402 @@
/* GStreamer
* Copyright (C) <2014> Sreerenj Balachandran <sreerenjb@gnome.org>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <stdlib.h> /* free */
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
#include "gstwebpenc.h"
#define GST_CAT_DEFAULT webpenc_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
enum
{
PROP_0,
PROP_LOSSLESS,
PROP_QUALITY,
PROP_SPEED,
PROP_PRESET
};
#define DEFAULT_LOSSLESS FALSE
#define DEFAULT_QUALITY 90
#define DEFAULT_SPEED 4
#define DEFAULT_PRESET WEBP_PRESET_PHOTO
static void gst_webp_enc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_webp_enc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_webp_enc_start (GstVideoEncoder * benc);
static gboolean gst_webp_enc_stop (GstVideoEncoder * benc);
static gboolean gst_webp_enc_set_format (GstVideoEncoder * encoder,
GstVideoCodecState * state);
static GstFlowReturn gst_webp_enc_handle_frame (GstVideoEncoder * encoder,
GstVideoCodecFrame * frame);
static gboolean gst_webp_enc_propose_allocation (GstVideoEncoder * encoder,
GstQuery * query);
static GstStaticPadTemplate webp_enc_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ I420, YV12, RGB, RGBA}"))
);
static GstStaticPadTemplate webp_enc_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("image/webp, "
"framerate = (fraction) [0/1, MAX], "
"width = (int) [ 16, 16383 ], " "height = (int) [ 16, 16383 ]")
);
enum
{
GST_WEBP_PRESET_DEFAULT,
GST_WEBP_PRESET_PICTURE,
GST_WEBP_PRESET_PHOTO,
GST_WEBP_PRESET_DRAWING,
GST_WEBP_PRESET_ICON,
GST_WEBP_PREET_TEXT
};
static const GEnumValue preset_values[] = {
{GST_WEBP_PRESET_DEFAULT, "Default", "none"},
{GST_WEBP_PRESET_PICTURE, "Digital picture,inner shot", "picture"},
{GST_WEBP_PRESET_PHOTO, "Outdoor photo, natural lighting", "photo"},
{GST_WEBP_PRESET_DRAWING, "Hand or Line drawing", "drawing"},
{GST_WEBP_PRESET_ICON, "Small-sized colorful images", "icon"},
{GST_WEBP_PREET_TEXT, "text-like", "text"},
{0, NULL, NULL},
};
#define GST_WEBP_ENC_PRESET_TYPE (gst_webp_enc_preset_get_type())
static GType
gst_webp_enc_preset_get_type (void)
{
static GType preset_type = 0;
if (!preset_type) {
preset_type = g_enum_register_static ("GstWebpEncPreset", preset_values);
}
return preset_type;
}
#define gst_webp_enc_parent_class parent_class
G_DEFINE_TYPE (GstWebpEnc, gst_webp_enc, GST_TYPE_VIDEO_ENCODER);
static void
gst_webp_enc_class_init (GstWebpEncClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstVideoEncoderClass *venc_class;
gobject_class = (GObjectClass *) klass;
element_class = (GstElementClass *) klass;
venc_class = (GstVideoEncoderClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = gst_webp_enc_set_property;
gobject_class->get_property = gst_webp_enc_get_property;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&webp_enc_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&webp_enc_src_factory));
gst_element_class_set_static_metadata (element_class, "WEBP image encoder",
"Codec/Encoder/Image",
"Encode images in WEBP format",
"Sreerenj Balachandran <sreerenjb@gnome.org>");
venc_class->start = gst_webp_enc_start;
venc_class->stop = gst_webp_enc_stop;
venc_class->set_format = gst_webp_enc_set_format;
venc_class->handle_frame = gst_webp_enc_handle_frame;
venc_class->propose_allocation = gst_webp_enc_propose_allocation;
g_object_class_install_property (gobject_class, PROP_LOSSLESS,
g_param_spec_boolean ("lossless", "Lossless",
"Enable lossless encoding",
DEFAULT_LOSSLESS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_QUALITY,
g_param_spec_float ("quality", "quality-level",
"quality level, between 0 (smallest file) and 100 (biggest)",
0, 100, DEFAULT_QUALITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SPEED,
g_param_spec_uint ("speed", "Compression Method",
"quality/speed trade-off (0=fast, 6=slower-better)",
0, 6, DEFAULT_SPEED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PRESET,
g_param_spec_enum ("preset", "preset tuning",
"Preset name for visual tuning",
GST_WEBP_ENC_PRESET_TYPE, DEFAULT_PRESET,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
GST_DEBUG_CATEGORY_INIT (webpenc_debug, "webpenc", 0,
"WEBP encoding element");
}
static void
gst_webp_enc_init (GstWebpEnc * webpenc)
{
webpenc->lossless = DEFAULT_LOSSLESS;
webpenc->quality = DEFAULT_QUALITY;
webpenc->speed = DEFAULT_SPEED;
webpenc->preset = DEFAULT_PRESET;
webpenc->use_argb = FALSE;
webpenc->rgb_format = GST_VIDEO_FORMAT_UNKNOWN;
}
static gboolean
gst_webp_enc_set_format (GstVideoEncoder * encoder, GstVideoCodecState * state)
{
GstWebpEnc *enc = GST_WEBP_ENC (encoder);
GstVideoCodecState *output_state;
GstVideoInfo *info;
GstVideoFormat format;
info = &state->info;
format = GST_VIDEO_INFO_FORMAT (info);
if (GST_VIDEO_INFO_IS_YUV (info)) {
switch (format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
enc->webp_color_space = WEBP_YUV420;
break;
default:
break;
}
} else {
if (GST_VIDEO_INFO_IS_RGB (info)) {
enc->rgb_format = format;
enc->use_argb = 1;
}
}
if (enc->input_state)
gst_video_codec_state_unref (enc->input_state);
enc->input_state = gst_video_codec_state_ref (state);
output_state =
gst_video_encoder_set_output_state (GST_VIDEO_ENCODER (enc),
gst_caps_new_empty_simple ("image/webp"), enc->input_state);
gst_video_codec_state_unref (output_state);
return TRUE;
}
static gboolean
gst_webp_set_picture_params (GstWebpEnc * enc)
{
GstVideoInfo *info;
gboolean ret = TRUE;
info = &enc->input_state->info;
if (!WebPPictureInit (&enc->webp_picture)) {
ret = FALSE;
goto failed_pic_init;
}
enc->webp_picture.use_argb = enc->use_argb;
if (!enc->use_argb)
enc->webp_picture.colorspace = enc->webp_color_space;
enc->webp_picture.width = GST_VIDEO_INFO_WIDTH (info);
enc->webp_picture.height = GST_VIDEO_INFO_HEIGHT (info);
WebPMemoryWriterInit (&enc->webp_writer);
enc->webp_picture.writer = WebPMemoryWrite;
enc->webp_picture.custom_ptr = &enc->webp_writer;
return ret;
failed_pic_init:
{
GST_ERROR_OBJECT (enc, "Failed to Initialize WebPPicture !");
return ret;
}
}
static GstFlowReturn
gst_webp_enc_handle_frame (GstVideoEncoder * encoder,
GstVideoCodecFrame * frame)
{
GstWebpEnc *enc = GST_WEBP_ENC (encoder);
GstBuffer *out_buffer = NULL;
GstVideoFrame vframe;
GST_LOG_OBJECT (enc, "got new frame");
gst_webp_set_picture_params (enc);
if (!gst_video_frame_map (&vframe, &enc->input_state->info,
frame->input_buffer, GST_MAP_READ))
return GST_FLOW_ERROR;
if (!enc->use_argb) {
enc->webp_picture.y = GST_VIDEO_FRAME_COMP_DATA (&vframe, 0);
enc->webp_picture.u = GST_VIDEO_FRAME_COMP_DATA (&vframe, 1);
enc->webp_picture.v = GST_VIDEO_FRAME_COMP_DATA (&vframe, 2);
enc->webp_picture.y_stride = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 0);
enc->webp_picture.uv_stride = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 1);
} else {
switch (enc->rgb_format) {
case GST_VIDEO_FORMAT_RGB:
WebPPictureImportRGB (&enc->webp_picture,
GST_VIDEO_FRAME_COMP_DATA (&vframe, 0),
GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 0));
break;
case GST_VIDEO_FORMAT_RGBA:
WebPPictureImportRGBA (&enc->webp_picture,
GST_VIDEO_FRAME_COMP_DATA (&vframe, 0),
GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 0));
break;
default:
break;
}
}
if (WebPEncode (&enc->webp_config, &enc->webp_picture)) {
WebPPictureFree (&enc->webp_picture);
out_buffer = gst_buffer_new_allocate (NULL, enc->webp_writer.size, NULL);
if (!out_buffer) {
GST_ERROR_OBJECT (enc, "Failed to create output buffer");
return GST_FLOW_ERROR;
}
gst_buffer_fill (out_buffer, 0, enc->webp_writer.mem,
enc->webp_writer.size);
free (enc->webp_writer.mem);
} else {
GST_ERROR_OBJECT (enc, "Failed to encode WebPPicture");
return GST_FLOW_ERROR;
}
gst_video_frame_unmap (&vframe);
frame->output_buffer = out_buffer;
return gst_video_encoder_finish_frame (encoder, frame);
}
static gboolean
gst_webp_enc_propose_allocation (GstVideoEncoder * encoder, GstQuery * query)
{
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
return
GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
query);
}
static void
gst_webp_enc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstWebpEnc *webpenc = GST_WEBP_ENC (object);
switch (prop_id) {
case PROP_LOSSLESS:
webpenc->lossless = g_value_get_boolean (value);
break;
case PROP_QUALITY:
webpenc->quality = g_value_get_float (value);
break;
case PROP_SPEED:
webpenc->speed = g_value_get_uint (value);
break;
case PROP_PRESET:
webpenc->preset = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_webp_enc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstWebpEnc *webpenc = GST_WEBP_ENC (object);
switch (prop_id) {
case PROP_LOSSLESS:
g_value_set_boolean (value, webpenc->lossless);
break;
case PROP_QUALITY:
g_value_set_float (value, webpenc->quality);
break;
case PROP_SPEED:
g_value_set_uint (value, webpenc->speed);
break;
case PROP_PRESET:
g_value_set_enum (value, webpenc->preset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_webp_enc_start (GstVideoEncoder * benc)
{
GstWebpEnc *enc = (GstWebpEnc *) benc;
if (!WebPConfigPreset (&enc->webp_config, enc->preset, enc->quality)) {
GST_ERROR_OBJECT (enc, "Failed to Initialize WebPConfig ");
return FALSE;
}
enc->webp_config.lossless = enc->lossless;
enc->webp_config.method = enc->speed;
if (!WebPValidateConfig (&enc->webp_config)) {
GST_ERROR_OBJECT (enc, "Failed to Validate the WebPConfig");
return FALSE;
}
return TRUE;
}
static gboolean
gst_webp_enc_stop (GstVideoEncoder * benc)
{
GstWebpEnc *enc = GST_WEBP_ENC (benc);
if (enc->input_state)
gst_video_codec_state_unref (enc->input_state);
return TRUE;
}
gboolean
gst_webp_enc_register (GstPlugin * plugin)
{
return gst_element_register (plugin, "webpenc",
GST_RANK_PRIMARY, GST_TYPE_WEBP_ENC);
}

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ext/webp/gstwebpenc.h Normal file
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@ -0,0 +1,76 @@
/* GStreamer
* Copyright (C) <2014> Sreerenj Balachandran <sreerenjb@gnome.org>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_WEBPENC_H__
#define __GST_WEBPENC_H__
#include <gst/gst.h>
#include <gst/video/video.h>
#include <webp/encode.h>
G_BEGIN_DECLS
#define GST_TYPE_WEBP_ENC \
(gst_webp_enc_get_type())
#define GST_WEBP_ENC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WEBP_ENC,GstWebpEnc))
#define GST_WEBP_ENC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WEBP_ENC,GstWebpEncClass))
#define GST_IS_WEBP_ENC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WEBP_ENC))
#define GST_IS_WEBP_ENC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WEBP_ENC))
typedef struct _GstWebpEnc GstWebpEnc;
typedef struct _GstWebpEncClass GstWebpEncClass;
/**
* GstWebpEnc:
*
* Opaque data structure.
*/
struct _GstWebpEnc
{
GstVideoEncoder element;
GstVideoCodecState *input_state;
gboolean lossless;
gfloat quality;
guint speed;
gint preset;
gboolean use_argb;
GstVideoFormat rgb_format;
WebPEncCSP webp_color_space;
struct WebPConfig webp_config;
struct WebPPicture webp_picture;
WebPMemoryWriter webp_writer;
};
struct _GstWebpEncClass
{
GstVideoEncoderClass parent_class;
};
GType gst_webp_enc_get_type (void);
gboolean gst_webp_enc_register (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_WEBPENC_H__ */