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493 lines
14 KiB
C
493 lines
14 KiB
C
/* GStreamer
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* Copyright (C) <2013> Sreerenj Balachandran <sreerenj.balachandran@intel.com>
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* Copyright (C) <2013> Intel Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gstwebpdec.h"
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#define MIN_WIDTH 1
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#define MAX_WIDTH 16383
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#define MIN_HEIGHT 1
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#define MAX_HEIGHT 16383
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enum
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{
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PROP_0,
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PROP_BYPASS_FILTERING,
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PROP_NO_FANCY_UPSAMPLING,
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PROP_USE_THREADS
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};
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static GstStaticPadTemplate gst_webp_dec_sink_pad_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("image/webp")
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);
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/*Fixme: Add YUV support */
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static GstStaticPadTemplate gst_webp_dec_src_pad_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE
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("{ RGB, RGBA, BGR, BGRA, ARGB, RGB16}"))
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);
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GST_DEBUG_CATEGORY_STATIC (webp_dec_debug);
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#define GST_CAT_DEFAULT webp_dec_debug
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static void gst_webp_dec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_webp_dec_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_webp_dec_start (GstVideoDecoder * bdec);
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static gboolean gst_webp_dec_stop (GstVideoDecoder * bdec);
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static gboolean gst_webp_dec_set_format (GstVideoDecoder * dec,
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GstVideoCodecState * state);
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static GstFlowReturn gst_webp_dec_parse (GstVideoDecoder * bdec,
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GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
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static GstFlowReturn gst_webp_dec_handle_frame (GstVideoDecoder * bdec,
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GstVideoCodecFrame * frame);
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static gboolean gst_webp_dec_decide_allocation (GstVideoDecoder * bdec,
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GstQuery * query);
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static gboolean gst_webp_dec_sink_event (GstVideoDecoder * bdec,
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GstEvent * event);
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static gboolean gst_webp_dec_reset_frame (GstWebPDec * webpdec);
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#define gst_webp_dec_parent_class parent_class
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G_DEFINE_TYPE (GstWebPDec, gst_webp_dec, GST_TYPE_VIDEO_DECODER);
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GST_ELEMENT_REGISTER_DEFINE (webpdec, "webpdec",
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GST_RANK_PRIMARY, GST_TYPE_WEBP_DEC);
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static void
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gst_webp_dec_class_init (GstWebPDecClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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GstVideoDecoderClass *vdec_class;
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gobject_class = (GObjectClass *) klass;
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element_class = (GstElementClass *) klass;
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vdec_class = (GstVideoDecoderClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_webp_dec_set_property;
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gobject_class->get_property = gst_webp_dec_get_property;
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gst_element_class_add_static_pad_template (element_class,
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&gst_webp_dec_src_pad_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_webp_dec_sink_pad_template);
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gst_element_class_set_static_metadata (element_class, "WebP image decoder",
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"Codec/Decoder/Image", "Decode images from WebP format",
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"Sreerenj Balachandran <sreerenj.balachandrn@intel.com>");
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g_object_class_install_property (gobject_class, PROP_BYPASS_FILTERING,
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g_param_spec_boolean ("bypass-filtering", "Bypass Filtering",
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"When enabled, skip the in-loop filtering", FALSE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_NO_FANCY_UPSAMPLING,
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g_param_spec_boolean ("no-fancy-upsampling", "No Fancy Upsampling",
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"When enabled, use faster pointwise upsampler", FALSE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_USE_THREADS,
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g_param_spec_boolean ("use-threads", "Use Threads",
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"When enabled, use multi-threaded decoding", FALSE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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vdec_class->start = gst_webp_dec_start;
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vdec_class->stop = gst_webp_dec_stop;
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vdec_class->parse = gst_webp_dec_parse;
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vdec_class->set_format = gst_webp_dec_set_format;
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vdec_class->handle_frame = gst_webp_dec_handle_frame;
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vdec_class->decide_allocation = gst_webp_dec_decide_allocation;
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vdec_class->sink_event = gst_webp_dec_sink_event;
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GST_DEBUG_CATEGORY_INIT (webp_dec_debug, "webpdec", 0, "WebP decoder");
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}
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static void
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gst_webp_dec_init (GstWebPDec * dec)
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{
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GST_DEBUG ("Initialize the webp decoder");
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memset (&dec->config, 0, sizeof (dec->config));
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dec->saw_header = FALSE;
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dec->bypass_filtering = FALSE;
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dec->no_fancy_upsampling = FALSE;
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dec->use_threads = FALSE;
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gst_video_decoder_set_use_default_pad_acceptcaps (GST_VIDEO_DECODER_CAST
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(dec), TRUE);
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GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_DECODER_SINK_PAD (dec));
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}
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static gboolean
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gst_webp_dec_reset_frame (GstWebPDec * webpdec)
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{
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GST_DEBUG ("Reset the current frame properties");
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webpdec->saw_header = FALSE;
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if (!WebPInitDecoderConfig (&webpdec->config)) {
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GST_WARNING_OBJECT (webpdec,
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"Failed to configure the WebP image decoding libraray");
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return FALSE;
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}
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return TRUE;
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}
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static void
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gst_webp_dec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstWebPDec *dec;
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dec = GST_WEBP_DEC (object);
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switch (prop_id) {
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case PROP_BYPASS_FILTERING:
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dec->bypass_filtering = g_value_get_boolean (value);
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break;
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case PROP_NO_FANCY_UPSAMPLING:
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dec->no_fancy_upsampling = g_value_get_boolean (value);
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break;
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case PROP_USE_THREADS:
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dec->use_threads = g_value_get_boolean (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_webp_dec_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstWebPDec *dec;
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dec = GST_WEBP_DEC (object);
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switch (prop_id) {
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case PROP_BYPASS_FILTERING:
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g_value_set_boolean (value, dec->bypass_filtering);
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break;
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case PROP_NO_FANCY_UPSAMPLING:
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g_value_set_boolean (value, dec->no_fancy_upsampling);
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break;
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case PROP_USE_THREADS:
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g_value_set_boolean (value, dec->use_threads);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_webp_dec_start (GstVideoDecoder * decoder)
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{
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GstWebPDec *webpdec = (GstWebPDec *) decoder;
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return gst_webp_dec_reset_frame (webpdec);
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}
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static gboolean
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gst_webp_dec_stop (GstVideoDecoder * bdec)
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{
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GstWebPDec *webpdec = (GstWebPDec *) bdec;
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if (webpdec->input_state) {
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gst_video_codec_state_unref (webpdec->input_state);
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webpdec->input_state = NULL;
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}
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if (webpdec->output_state) {
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gst_video_codec_state_unref (webpdec->output_state);
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webpdec->output_state = NULL;
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}
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return TRUE;
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}
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static gboolean
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gst_webp_dec_set_format (GstVideoDecoder * decoder, GstVideoCodecState * state)
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{
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GstWebPDec *webpdec = (GstWebPDec *) decoder;
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if (webpdec->input_state)
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gst_video_codec_state_unref (webpdec->input_state);
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webpdec->input_state = gst_video_codec_state_ref (state);
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return TRUE;
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}
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static gboolean
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gst_webp_dec_decide_allocation (GstVideoDecoder * bdec, GstQuery * query)
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{
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GstBufferPool *pool = NULL;
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GstStructure *config;
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if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (bdec, query))
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return FALSE;
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if (gst_query_get_n_allocation_pools (query) > 0)
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gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
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if (pool == NULL)
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return FALSE;
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config = gst_buffer_pool_get_config (pool);
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if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
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gst_buffer_pool_config_add_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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}
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gst_buffer_pool_set_config (pool, config);
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gst_object_unref (pool);
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return TRUE;
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}
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static gboolean
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gst_webp_dec_sink_event (GstVideoDecoder * bdec, GstEvent * event)
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{
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const GstSegment *segment;
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if (GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT)
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goto done;
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gst_event_parse_segment (event, &segment);
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if (segment->format == GST_FORMAT_TIME)
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gst_video_decoder_set_packetized (bdec, TRUE);
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else
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gst_video_decoder_set_packetized (bdec, FALSE);
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done:
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return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (bdec, event);
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}
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static GstFlowReturn
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gst_webp_dec_parse (GstVideoDecoder * decoder, GstVideoCodecFrame * frame,
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GstAdapter * adapter, gboolean at_eos)
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{
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gsize toadd = 0;
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gsize size;
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gconstpointer data;
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GstByteReader reader;
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GstWebPDec *webpdec = (GstWebPDec *) decoder;
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size = gst_adapter_available (adapter);
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GST_DEBUG_OBJECT (decoder,
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"parsing webp image data (%" G_GSIZE_FORMAT " bytes)", size);
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if (at_eos) {
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GST_DEBUG ("Flushing all data out");
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toadd = size;
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/* If we have leftover data, throw it away */
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if (!webpdec->saw_header)
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goto drop_frame;
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goto have_full_frame;
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}
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if (!webpdec->saw_header) {
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guint32 code;
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if (size < 12)
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goto need_more_data;
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data = gst_adapter_map (adapter, size);
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gst_byte_reader_init (&reader, data, size);
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if (!gst_byte_reader_get_uint32_le (&reader, &code))
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goto error;
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if (code == GST_MAKE_FOURCC ('R', 'I', 'F', 'F')) {
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if (!gst_byte_reader_get_uint32_le (&reader, &webpdec->frame_size))
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goto error;
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if (!gst_byte_reader_get_uint32_le (&reader, &code))
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goto error;
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if (code == GST_MAKE_FOURCC ('W', 'E', 'B', 'P'))
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webpdec->saw_header = TRUE;
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}
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}
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if (!webpdec->saw_header)
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goto error;
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if (size >= (webpdec->frame_size + 8)) {
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toadd = webpdec->frame_size + 8;
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webpdec->saw_header = FALSE;
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goto have_full_frame;
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}
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need_more_data:
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return GST_VIDEO_DECODER_FLOW_NEED_DATA;
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have_full_frame:
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if (toadd)
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gst_video_decoder_add_to_frame (decoder, toadd);
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return gst_video_decoder_have_frame (decoder);
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drop_frame:
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gst_adapter_flush (adapter, size);
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return GST_FLOW_OK;
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error:
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return GST_FLOW_ERROR;
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}
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static GstFlowReturn
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gst_webp_dec_update_src_caps (GstWebPDec * dec, GstMapInfo * map_info)
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{
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WebPBitstreamFeatures features;
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GstVideoFormat format = GST_VIDEO_FORMAT_UNKNOWN;
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if (WebPGetFeatures (map_info->data, map_info->size,
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&features) != VP8_STATUS_OK) {
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GST_ERROR_OBJECT (dec, "Failed to execute WebPGetFeatures");
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return GST_FLOW_ERROR;
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}
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if (features.width < MIN_WIDTH || features.width > MAX_WIDTH
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|| features.height < MIN_HEIGHT || features.height > MAX_HEIGHT) {
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GST_ERROR_OBJECT (dec, "Dimensions of the frame is unsupported by libwebp");
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return GST_FLOW_ERROR;
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}
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/* TODO: Add support for other formats */
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if (features.has_alpha) {
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format = GST_VIDEO_FORMAT_ARGB;
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dec->colorspace = MODE_ARGB;
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} else {
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format = GST_VIDEO_FORMAT_RGB;
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dec->colorspace = MODE_RGB;
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}
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/* Check if output state changed */
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if (dec->output_state) {
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GstVideoInfo *info = &dec->output_state->info;
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if (features.width == GST_VIDEO_INFO_WIDTH (info) &&
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features.height == GST_VIDEO_INFO_HEIGHT (info) &&
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GST_VIDEO_INFO_FORMAT (info) == format) {
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goto beach;
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}
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gst_video_codec_state_unref (dec->output_state);
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}
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dec->output_state =
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gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec), format,
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features.width, features.height, dec->input_state);
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if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec)))
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return GST_FLOW_NOT_NEGOTIATED;
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beach:
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return GST_FLOW_OK;
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}
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static GstFlowReturn
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gst_webp_dec_handle_frame (GstVideoDecoder * decoder,
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GstVideoCodecFrame * frame)
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{
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GstWebPDec *webpdec = (GstWebPDec *) decoder;
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GstMapInfo map_info;
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GstFlowReturn ret = GST_FLOW_OK;
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GstVideoFrame vframe;
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gst_buffer_map (frame->input_buffer, &map_info, GST_MAP_READ);
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ret = gst_webp_dec_update_src_caps (webpdec, &map_info);
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if (ret != GST_FLOW_OK) {
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gst_buffer_unmap (frame->input_buffer, &map_info);
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gst_video_codec_frame_unref (frame);
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goto done;
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}
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ret = gst_video_decoder_allocate_output_frame (decoder, frame);
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if (G_UNLIKELY (ret != GST_FLOW_OK)) {
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GST_ERROR_OBJECT (decoder, "failed to allocate output frame");
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ret = GST_FLOW_ERROR;
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gst_buffer_unmap (frame->input_buffer, &map_info);
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gst_video_codec_frame_unref (frame);
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goto done;
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}
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if (!gst_video_frame_map (&vframe, &webpdec->output_state->info,
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frame->output_buffer, GST_MAP_READWRITE)) {
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GST_ERROR_OBJECT (decoder, "Failed to map output videoframe");
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ret = GST_FLOW_ERROR;
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gst_buffer_unmap (frame->input_buffer, &map_info);
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gst_video_codec_frame_unref (frame);
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goto done;
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}
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/* configure output buffer parameteres */
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webpdec->config.options.bypass_filtering = webpdec->bypass_filtering;
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webpdec->config.options.no_fancy_upsampling = webpdec->no_fancy_upsampling;
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webpdec->config.options.use_threads = webpdec->use_threads;
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webpdec->config.output.colorspace = webpdec->colorspace;
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webpdec->config.output.u.RGBA.rgba = (uint8_t *) vframe.map[0].data;
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webpdec->config.output.u.RGBA.stride =
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GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 0);
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webpdec->config.output.u.RGBA.size = GST_VIDEO_FRAME_SIZE (&vframe);
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webpdec->config.output.is_external_memory = 1;
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if (WebPDecode (map_info.data, map_info.size,
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&webpdec->config) != VP8_STATUS_OK) {
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GST_ERROR_OBJECT (decoder, "Failed to decode the webp frame");
|
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ret = GST_FLOW_ERROR;
|
|
gst_video_frame_unmap (&vframe);
|
|
gst_buffer_unmap (frame->input_buffer, &map_info);
|
|
gst_video_codec_frame_unref (frame);
|
|
|
|
goto done;
|
|
}
|
|
|
|
gst_video_frame_unmap (&vframe);
|
|
gst_buffer_unmap (frame->input_buffer, &map_info);
|
|
|
|
ret = gst_video_decoder_finish_frame (decoder, frame);
|
|
|
|
if (!gst_webp_dec_reset_frame (webpdec)) {
|
|
ret = GST_FLOW_ERROR;
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
}
|