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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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44d4eaab7c
Some cameras (Panacast) have buggy drivers/firmware which send invalid JPEG frames, containing no data, which makes jpegdec crash because it assumes the frame is at least 2 bytes long. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/723>
1585 lines
48 KiB
C
1585 lines
48 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2009> Tim-Philipp Müller <tim centricular net>
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* Copyright (C) 2012 Collabora Ltd.
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* Author : Edward Hervey <edward@collabora.com>
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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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/**
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* SECTION:element-jpegdec
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* @title: jpegdec
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*
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* Decodes jpeg images.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v filesrc location=mjpeg.avi ! avidemux ! queue ! jpegdec ! videoconvert ! videoscale ! autovideosink
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* ]| The above pipeline decode the mjpeg stream and renders it to the screen.
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*
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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 "gstjpegdec.h"
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#include "gstjpeg.h"
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#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include <gst/video/gstvideopool.h>
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#include "gst/gst-i18n-plugin.h"
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#include <jerror.h>
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#define MIN_WIDTH 1
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#define MAX_WIDTH 65535
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#define MIN_HEIGHT 1
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#define MAX_HEIGHT 65535
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#define CINFO_GET_JPEGDEC(cinfo_ptr) \
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(((struct GstJpegDecSourceMgr*)((cinfo_ptr)->src))->dec)
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#define JPEG_DEFAULT_IDCT_METHOD JDCT_FASTEST
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#define JPEG_DEFAULT_MAX_ERRORS 0
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enum
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{
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PROP_0,
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PROP_IDCT_METHOD,
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PROP_MAX_ERRORS
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};
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/* *INDENT-OFF* */
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static GstStaticPadTemplate gst_jpeg_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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("{ I420, RGB, BGR, RGBx, xRGB, BGRx, xBGR, GRAY8 }"))
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);
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/* *INDENT-ON* */
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/* FIXME: sof-marker is for IJG libjpeg 8, should be different for 6.2 */
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/* FIXME: add back "sof-marker = (int) { 0, 1, 2, 5, 6, 7, 9, 10, 13, 14 }"
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* once we have a parser and/or demuxer set caps properly */
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static GstStaticPadTemplate gst_jpeg_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/jpeg")
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);
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GST_DEBUG_CATEGORY_STATIC (jpeg_dec_debug);
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#define GST_CAT_DEFAULT jpeg_dec_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
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static void gst_jpeg_dec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_jpeg_dec_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_jpeg_dec_set_format (GstVideoDecoder * dec,
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GstVideoCodecState * state);
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static gboolean gst_jpeg_dec_start (GstVideoDecoder * bdec);
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static gboolean gst_jpeg_dec_stop (GstVideoDecoder * bdec);
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static gboolean gst_jpeg_dec_flush (GstVideoDecoder * bdec);
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static GstFlowReturn gst_jpeg_dec_parse (GstVideoDecoder * bdec,
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GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
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static GstFlowReturn gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec,
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GstVideoCodecFrame * frame);
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static gboolean gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec,
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GstQuery * query);
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static gboolean gst_jpeg_dec_sink_event (GstVideoDecoder * bdec,
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GstEvent * event);
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#define gst_jpeg_dec_parent_class parent_class
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G_DEFINE_TYPE (GstJpegDec, gst_jpeg_dec, GST_TYPE_VIDEO_DECODER);
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static void
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gst_jpeg_dec_finalize (GObject * object)
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{
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GstJpegDec *dec = GST_JPEG_DEC (object);
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jpeg_destroy_decompress (&dec->cinfo);
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if (dec->input_state)
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gst_video_codec_state_unref (dec->input_state);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_jpeg_dec_class_init (GstJpegDecClass * 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->finalize = gst_jpeg_dec_finalize;
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gobject_class->set_property = gst_jpeg_dec_set_property;
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gobject_class->get_property = gst_jpeg_dec_get_property;
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g_object_class_install_property (gobject_class, PROP_IDCT_METHOD,
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g_param_spec_enum ("idct-method", "IDCT Method",
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"The IDCT algorithm to use", GST_TYPE_IDCT_METHOD,
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JPEG_DEFAULT_IDCT_METHOD,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstJpegDec:max-errors:
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*
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* Error out after receiving N consecutive decoding errors
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* (-1 = never error out, 0 = automatic, 1 = fail on first error, etc.)
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*
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* Deprecated: 1.3.1: Property wasn't used internally
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*/
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#ifndef GST_REMOVE_DEPRECATED
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g_object_class_install_property (gobject_class, PROP_MAX_ERRORS,
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g_param_spec_int ("max-errors", "Maximum Consecutive Decoding Errors",
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"(Deprecated) Error out after receiving N consecutive decoding errors"
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" (-1 = never fail, 0 = automatic, 1 = fail on first error)",
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-1, G_MAXINT, JPEG_DEFAULT_MAX_ERRORS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED));
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#endif
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gst_element_class_add_static_pad_template (element_class,
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&gst_jpeg_dec_src_pad_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_jpeg_dec_sink_pad_template);
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gst_element_class_set_static_metadata (element_class, "JPEG image decoder",
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"Codec/Decoder/Image", "Decode images from JPEG format",
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"Wim Taymans <wim@fluendo.com>");
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vdec_class->start = gst_jpeg_dec_start;
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vdec_class->stop = gst_jpeg_dec_stop;
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vdec_class->flush = gst_jpeg_dec_flush;
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vdec_class->parse = gst_jpeg_dec_parse;
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vdec_class->set_format = gst_jpeg_dec_set_format;
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vdec_class->handle_frame = gst_jpeg_dec_handle_frame;
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vdec_class->decide_allocation = gst_jpeg_dec_decide_allocation;
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vdec_class->sink_event = gst_jpeg_dec_sink_event;
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GST_DEBUG_CATEGORY_INIT (jpeg_dec_debug, "jpegdec", 0, "JPEG decoder");
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GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
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gst_type_mark_as_plugin_api (GST_TYPE_IDCT_METHOD, 0);
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}
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static boolean
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gst_jpeg_dec_fill_input_buffer (j_decompress_ptr cinfo)
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{
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/* We pass in full frame initially, if this get called, the frame is most likely
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* corrupted */
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return FALSE;
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}
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static void
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gst_jpeg_dec_init_source (j_decompress_ptr cinfo)
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{
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GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "init_source");
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}
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static void
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gst_jpeg_dec_skip_input_data (j_decompress_ptr cinfo, glong num_bytes)
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{
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GstJpegDec *dec = CINFO_GET_JPEGDEC (cinfo);
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GST_DEBUG_OBJECT (dec, "skip %ld bytes", num_bytes);
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if (num_bytes > 0 && cinfo->src->bytes_in_buffer >= num_bytes) {
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cinfo->src->next_input_byte += (size_t) num_bytes;
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cinfo->src->bytes_in_buffer -= (size_t) num_bytes;
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}
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}
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static boolean
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gst_jpeg_dec_resync_to_restart (j_decompress_ptr cinfo, gint desired)
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{
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GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "resync_to_start");
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return TRUE;
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}
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static void
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gst_jpeg_dec_term_source (j_decompress_ptr cinfo)
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{
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GST_LOG_OBJECT (CINFO_GET_JPEGDEC (cinfo), "term_source");
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return;
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}
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METHODDEF (void)
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gst_jpeg_dec_my_output_message (j_common_ptr cinfo)
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{
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return; /* do nothing */
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}
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METHODDEF (void)
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gst_jpeg_dec_my_emit_message (j_common_ptr cinfo, int msg_level)
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{
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/* GST_LOG_OBJECT (CINFO_GET_JPEGDEC (&cinfo), "msg_level=%d", msg_level); */
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return;
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}
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METHODDEF (void)
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gst_jpeg_dec_my_error_exit (j_common_ptr cinfo)
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{
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struct GstJpegDecErrorMgr *err_mgr = (struct GstJpegDecErrorMgr *) cinfo->err;
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(*cinfo->err->output_message) (cinfo);
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longjmp (err_mgr->setjmp_buffer, 1);
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}
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static void
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gst_jpeg_dec_init (GstJpegDec * dec)
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{
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GST_DEBUG ("initializing");
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/* setup jpeglib */
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memset (&dec->cinfo, 0, sizeof (dec->cinfo));
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memset (&dec->jerr, 0, sizeof (dec->jerr));
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dec->cinfo.err = jpeg_std_error (&dec->jerr.pub);
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dec->jerr.pub.output_message = gst_jpeg_dec_my_output_message;
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dec->jerr.pub.emit_message = gst_jpeg_dec_my_emit_message;
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dec->jerr.pub.error_exit = gst_jpeg_dec_my_error_exit;
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jpeg_create_decompress (&dec->cinfo);
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dec->cinfo.src = (struct jpeg_source_mgr *) &dec->jsrc;
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dec->cinfo.src->init_source = gst_jpeg_dec_init_source;
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dec->cinfo.src->fill_input_buffer = gst_jpeg_dec_fill_input_buffer;
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dec->cinfo.src->skip_input_data = gst_jpeg_dec_skip_input_data;
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dec->cinfo.src->resync_to_restart = gst_jpeg_dec_resync_to_restart;
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dec->cinfo.src->term_source = gst_jpeg_dec_term_source;
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dec->jsrc.dec = dec;
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/* init properties */
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dec->idct_method = JPEG_DEFAULT_IDCT_METHOD;
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dec->max_errors = JPEG_DEFAULT_MAX_ERRORS;
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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 inline gboolean
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gst_jpeg_dec_parse_tag_has_entropy_segment (guint8 tag)
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{
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if (tag == 0xda || (tag >= 0xd0 && tag <= 0xd7))
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return TRUE;
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return FALSE;
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}
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static GstFlowReturn
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gst_jpeg_dec_parse (GstVideoDecoder * bdec, GstVideoCodecFrame * frame,
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GstAdapter * adapter, gboolean at_eos)
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{
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guint size;
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gint toadd = 0;
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gboolean resync;
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gint offset = 0, noffset;
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GstJpegDec *dec = (GstJpegDec *) bdec;
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GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
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/* FIXME : The overhead of using scan_uint32 is massive */
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size = gst_adapter_available (adapter);
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GST_DEBUG ("Parsing jpeg image data (%u 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 (!dec->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 (size < 8)
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goto need_more_data;
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if (!dec->saw_header) {
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gint ret;
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/* we expect at least 4 bytes, first of which start marker */
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ret =
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gst_adapter_masked_scan_uint32 (adapter, 0xffff0000, 0xffd80000, 0,
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size - 4);
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GST_DEBUG ("ret:%d", ret);
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if (ret < 0)
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goto need_more_data;
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if (ret) {
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gst_adapter_flush (adapter, ret);
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size -= ret;
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}
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dec->saw_header = TRUE;
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}
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while (1) {
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guint frame_len;
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guint32 value;
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GST_DEBUG ("offset:%d, size:%d", offset, size);
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noffset =
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gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
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offset, size - offset, &value);
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/* lost sync if 0xff marker not where expected */
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if ((resync = (noffset != offset))) {
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GST_DEBUG ("Lost sync at 0x%08x, resyncing", offset + 2);
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}
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/* may have marker, but could have been resyncng */
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resync = resync || dec->parse_resync;
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/* Skip over extra 0xff */
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while ((noffset >= 0) && ((value & 0xff) == 0xff)) {
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noffset++;
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noffset =
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gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00, 0x0000ff00,
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noffset, size - noffset, &value);
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}
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/* enough bytes left for marker? (we need 0xNN after the 0xff) */
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if (noffset < 0) {
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GST_DEBUG ("at end of input and no EOI marker found, need more data");
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goto need_more_data;
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}
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/* now lock on the marker we found */
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offset = noffset;
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value = value & 0xff;
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if (value == 0xd9) {
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GST_DEBUG ("0x%08x: EOI marker", offset + 2);
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/* clear parse state */
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dec->saw_header = FALSE;
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dec->parse_resync = FALSE;
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toadd = offset + 4;
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goto have_full_frame;
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}
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if (value == 0xd8) {
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GST_DEBUG ("0x%08x: SOI marker before EOI marker", offset + 2);
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/* clear parse state */
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dec->saw_header = FALSE;
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dec->parse_resync = FALSE;
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toadd = offset;
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goto have_full_frame;
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}
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|
|
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if (value >= 0xd0 && value <= 0xd7)
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frame_len = 0;
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else {
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/* peek tag and subsequent length */
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if (offset + 2 + 4 > size)
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goto need_more_data;
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else
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gst_adapter_masked_scan_uint32_peek (adapter, 0x0, 0x0, offset + 2, 4,
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&frame_len);
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frame_len = frame_len & 0xffff;
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}
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GST_DEBUG ("0x%08x: tag %02x, frame_len=%u", offset + 2, value, frame_len);
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/* the frame length includes the 2 bytes for the length; here we want at
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* least 2 more bytes at the end for an end marker */
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if (offset + 2 + 2 + frame_len + 2 > size) {
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goto need_more_data;
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}
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if (gst_jpeg_dec_parse_tag_has_entropy_segment (value)) {
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guint eseglen = dec->parse_entropy_len;
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GST_DEBUG ("0x%08x: finding entropy segment length (eseglen:%d)",
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offset + 2, eseglen);
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if (size < offset + 2 + frame_len + eseglen)
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goto need_more_data;
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noffset = offset + 2 + frame_len + dec->parse_entropy_len;
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while (1) {
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GST_DEBUG ("noffset:%d, size:%d, size - noffset:%d",
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noffset, size, size - noffset);
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noffset = gst_adapter_masked_scan_uint32_peek (adapter, 0x0000ff00,
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0x0000ff00, noffset, size - noffset, &value);
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if (noffset < 0) {
|
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/* need more data */
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dec->parse_entropy_len = size - offset - 4 - frame_len - 2;
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goto need_more_data;
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}
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if ((value & 0xff) != 0x00) {
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eseglen = noffset - offset - frame_len - 2;
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break;
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}
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noffset++;
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}
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dec->parse_entropy_len = 0;
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frame_len += eseglen;
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GST_DEBUG ("entropy segment length=%u => frame_len=%u", eseglen,
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frame_len);
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}
|
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if (resync) {
|
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/* check if we will still be in sync if we interpret
|
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* this as a sync point and skip this frame */
|
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noffset = offset + frame_len + 2;
|
|
noffset = gst_adapter_masked_scan_uint32 (adapter, 0x0000ff00, 0x0000ff00,
|
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noffset, 4);
|
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if (noffset < 0) {
|
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/* ignore and continue resyncing until we hit the end
|
|
* of our data or find a sync point that looks okay */
|
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offset++;
|
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continue;
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}
|
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GST_DEBUG ("found sync at 0x%x", offset + 2);
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}
|
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|
|
/* Add current data to output buffer */
|
|
toadd += frame_len + 2;
|
|
offset += frame_len + 2;
|
|
}
|
|
|
|
need_more_data:
|
|
if (toadd)
|
|
gst_video_decoder_add_to_frame (bdec, toadd);
|
|
return GST_VIDEO_DECODER_FLOW_NEED_DATA;
|
|
|
|
have_full_frame:
|
|
if (toadd)
|
|
gst_video_decoder_add_to_frame (bdec, toadd);
|
|
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
|
|
return gst_video_decoder_have_frame (bdec);
|
|
|
|
drop_frame:
|
|
gst_adapter_flush (adapter, size);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
|
|
/* shamelessly ripped from jpegutils.c in mjpegtools */
|
|
static void
|
|
add_huff_table (j_decompress_ptr dinfo,
|
|
JHUFF_TBL ** htblptr, const UINT8 * bits, const UINT8 * val)
|
|
/* Define a Huffman table */
|
|
{
|
|
int nsymbols, len;
|
|
|
|
if (*htblptr == NULL)
|
|
*htblptr = jpeg_alloc_huff_table ((j_common_ptr) dinfo);
|
|
|
|
g_assert (*htblptr);
|
|
|
|
/* Copy the number-of-symbols-of-each-code-length counts */
|
|
memcpy ((*htblptr)->bits, bits, sizeof ((*htblptr)->bits));
|
|
|
|
/* Validate the counts. We do this here mainly so we can copy the right
|
|
* number of symbols from the val[] array, without risking marching off
|
|
* the end of memory. jchuff.c will do a more thorough test later.
|
|
*/
|
|
nsymbols = 0;
|
|
for (len = 1; len <= 16; len++)
|
|
nsymbols += bits[len];
|
|
if (nsymbols < 1 || nsymbols > 256)
|
|
g_error ("jpegutils.c: add_huff_table failed badly. ");
|
|
|
|
memcpy ((*htblptr)->huffval, val, nsymbols * sizeof (UINT8));
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
std_huff_tables (j_decompress_ptr dinfo)
|
|
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
|
|
/* IMPORTANT: these are only valid for 8-bit data precision! */
|
|
{
|
|
static const UINT8 bits_dc_luminance[17] =
|
|
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
|
|
static const UINT8 val_dc_luminance[] =
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
|
|
|
|
static const UINT8 bits_dc_chrominance[17] =
|
|
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
|
|
static const UINT8 val_dc_chrominance[] =
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
|
|
|
|
static const UINT8 bits_ac_luminance[17] =
|
|
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
|
|
static const UINT8 val_ac_luminance[] =
|
|
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
|
|
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
|
|
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
|
|
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
|
|
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
|
|
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
|
|
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
|
|
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
|
|
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
|
|
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
|
|
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
|
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
|
|
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
|
|
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
|
|
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
|
|
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
|
|
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
|
|
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
|
|
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
|
|
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
|
|
0xf9, 0xfa
|
|
};
|
|
|
|
static const UINT8 bits_ac_chrominance[17] =
|
|
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
|
|
static const UINT8 val_ac_chrominance[] =
|
|
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
|
|
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
|
|
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
|
|
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
|
|
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
|
|
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
|
|
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
|
|
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
|
|
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
|
|
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
|
|
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
|
|
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
|
|
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
|
|
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
|
|
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
|
|
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
|
|
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
|
|
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
|
|
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
|
|
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
|
|
0xf9, 0xfa
|
|
};
|
|
|
|
add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[0],
|
|
bits_dc_luminance, val_dc_luminance);
|
|
add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[0],
|
|
bits_ac_luminance, val_ac_luminance);
|
|
add_huff_table (dinfo, &dinfo->dc_huff_tbl_ptrs[1],
|
|
bits_dc_chrominance, val_dc_chrominance);
|
|
add_huff_table (dinfo, &dinfo->ac_huff_tbl_ptrs[1],
|
|
bits_ac_chrominance, val_ac_chrominance);
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
guarantee_huff_tables (j_decompress_ptr dinfo)
|
|
{
|
|
if ((dinfo->dc_huff_tbl_ptrs[0] == NULL) &&
|
|
(dinfo->dc_huff_tbl_ptrs[1] == NULL) &&
|
|
(dinfo->ac_huff_tbl_ptrs[0] == NULL) &&
|
|
(dinfo->ac_huff_tbl_ptrs[1] == NULL)) {
|
|
GST_DEBUG ("Generating standard Huffman tables for this frame.");
|
|
std_huff_tables (dinfo);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_jpeg_dec_set_format (GstVideoDecoder * dec, GstVideoCodecState * state)
|
|
{
|
|
GstJpegDec *jpeg = GST_JPEG_DEC (dec);
|
|
|
|
if (jpeg->input_state)
|
|
gst_video_codec_state_unref (jpeg->input_state);
|
|
jpeg->input_state = gst_video_codec_state_ref (state);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* yuk */
|
|
static void
|
|
hresamplecpy1 (guint8 * dest, const guint8 * src, guint len)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
/* equivalent to: dest[i] = src[i << 1] */
|
|
*dest = *src;
|
|
++dest;
|
|
++src;
|
|
++src;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_free_buffers (GstJpegDec * dec)
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
g_free (dec->idr_y[i]);
|
|
g_free (dec->idr_u[i]);
|
|
g_free (dec->idr_v[i]);
|
|
dec->idr_y[i] = NULL;
|
|
dec->idr_u[i] = NULL;
|
|
dec->idr_v[i] = NULL;
|
|
}
|
|
|
|
dec->idr_width_allocated = 0;
|
|
}
|
|
|
|
static inline gboolean
|
|
gst_jpeg_dec_ensure_buffers (GstJpegDec * dec, guint maxrowbytes)
|
|
{
|
|
gint i;
|
|
|
|
if (G_LIKELY (dec->idr_width_allocated == maxrowbytes))
|
|
return TRUE;
|
|
|
|
/* FIXME: maybe just alloc one or three blocks altogether? */
|
|
for (i = 0; i < 16; i++) {
|
|
dec->idr_y[i] = g_try_realloc (dec->idr_y[i], maxrowbytes);
|
|
dec->idr_u[i] = g_try_realloc (dec->idr_u[i], maxrowbytes);
|
|
dec->idr_v[i] = g_try_realloc (dec->idr_v[i], maxrowbytes);
|
|
|
|
if (G_UNLIKELY (!dec->idr_y[i] || !dec->idr_u[i] || !dec->idr_v[i])) {
|
|
GST_WARNING_OBJECT (dec, "out of memory, i=%d, bytes=%u", i, maxrowbytes);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
dec->idr_width_allocated = maxrowbytes;
|
|
GST_LOG_OBJECT (dec, "allocated temp memory, %u bytes/row", maxrowbytes);
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_decode_grayscale (GstJpegDec * dec, GstVideoFrame * frame,
|
|
guint field, guint num_fields)
|
|
{
|
|
guchar *rows[16];
|
|
guchar **scanarray[1] = { rows };
|
|
gint i, j, k;
|
|
gint lines;
|
|
guint8 *base[1];
|
|
gint width, height;
|
|
gint pstride, rstride;
|
|
|
|
GST_DEBUG_OBJECT (dec, "indirect decoding of grayscale");
|
|
|
|
width = GST_VIDEO_FRAME_WIDTH (frame);
|
|
height = GST_VIDEO_FRAME_HEIGHT (frame) / num_fields;
|
|
|
|
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
|
|
return;
|
|
|
|
base[0] = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
|
|
if (field == 2) {
|
|
base[0] += GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
|
|
}
|
|
|
|
pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
|
|
rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0) * num_fields;
|
|
|
|
memcpy (rows, dec->idr_y, 16 * sizeof (gpointer));
|
|
|
|
i = 0;
|
|
while (i < height) {
|
|
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
|
|
if (G_LIKELY (lines > 0)) {
|
|
for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
|
|
gint p;
|
|
|
|
p = 0;
|
|
for (k = 0; k < width; k++) {
|
|
base[0][p] = rows[j][k];
|
|
p += pstride;
|
|
}
|
|
base[0] += rstride;
|
|
}
|
|
} else {
|
|
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_decode_rgb (GstJpegDec * dec, GstVideoFrame * frame,
|
|
guint field, guint num_fields)
|
|
{
|
|
guchar *r_rows[16], *g_rows[16], *b_rows[16];
|
|
guchar **scanarray[3] = { r_rows, g_rows, b_rows };
|
|
gint i, j, k;
|
|
gint lines;
|
|
guint8 *base[3];
|
|
guint pstride, rstride;
|
|
gint width, height;
|
|
|
|
GST_DEBUG_OBJECT (dec, "indirect decoding of RGB");
|
|
|
|
width = GST_VIDEO_FRAME_WIDTH (frame);
|
|
height = GST_VIDEO_FRAME_HEIGHT (frame) / num_fields;
|
|
|
|
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
|
|
return;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
|
|
if (field == 2)
|
|
base[i] += GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
|
|
}
|
|
|
|
pstride = GST_VIDEO_FRAME_COMP_PSTRIDE (frame, 0);
|
|
rstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0) * num_fields;
|
|
|
|
memcpy (r_rows, dec->idr_y, 16 * sizeof (gpointer));
|
|
memcpy (g_rows, dec->idr_u, 16 * sizeof (gpointer));
|
|
memcpy (b_rows, dec->idr_v, 16 * sizeof (gpointer));
|
|
|
|
i = 0;
|
|
while (i < height) {
|
|
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, DCTSIZE);
|
|
if (G_LIKELY (lines > 0)) {
|
|
for (j = 0; (j < DCTSIZE) && (i < height); j++, i++) {
|
|
gint p;
|
|
|
|
p = 0;
|
|
for (k = 0; k < width; k++) {
|
|
base[0][p] = r_rows[j][k];
|
|
base[1][p] = g_rows[j][k];
|
|
base[2][p] = b_rows[j][k];
|
|
p += pstride;
|
|
}
|
|
base[0] += rstride;
|
|
base[1] += rstride;
|
|
base[2] += rstride;
|
|
}
|
|
} else {
|
|
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_decode_indirect (GstJpegDec * dec, GstVideoFrame * frame, gint r_v,
|
|
gint r_h, gint comp, guint field, guint num_fields)
|
|
{
|
|
guchar *y_rows[16], *u_rows[16], *v_rows[16];
|
|
guchar **scanarray[3] = { y_rows, u_rows, v_rows };
|
|
gint i, j, k;
|
|
gint lines;
|
|
guchar *base[3], *last[3];
|
|
gint rowsize[3], stride[3];
|
|
gint width, height;
|
|
|
|
GST_DEBUG_OBJECT (dec,
|
|
"unadvantageous width or r_h, taking slow route involving memcpy");
|
|
|
|
width = GST_VIDEO_FRAME_WIDTH (frame);
|
|
height = GST_VIDEO_FRAME_HEIGHT (frame);
|
|
|
|
if (G_UNLIKELY (!gst_jpeg_dec_ensure_buffers (dec, GST_ROUND_UP_32 (width))))
|
|
return;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
|
|
stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i) * num_fields;
|
|
rowsize[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
|
|
/* make sure we don't make jpeglib write beyond our buffer,
|
|
* which might happen if (height % (r_v*DCTSIZE)) != 0 */
|
|
last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
|
|
(GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
|
|
|
|
if (field == 2) {
|
|
base[i] += GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
|
|
}
|
|
}
|
|
|
|
memcpy (y_rows, dec->idr_y, 16 * sizeof (gpointer));
|
|
memcpy (u_rows, dec->idr_u, 16 * sizeof (gpointer));
|
|
memcpy (v_rows, dec->idr_v, 16 * sizeof (gpointer));
|
|
|
|
/* fill chroma components for grayscale */
|
|
if (comp == 1) {
|
|
GST_DEBUG_OBJECT (dec, "grayscale, filling chroma");
|
|
for (i = 0; i < 16; i++) {
|
|
memset (u_rows[i], GST_ROUND_UP_32 (width), 0x80);
|
|
memset (v_rows[i], GST_ROUND_UP_32 (width), 0x80);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < height; i += r_v * DCTSIZE) {
|
|
lines = jpeg_read_raw_data (&dec->cinfo, scanarray, r_v * DCTSIZE);
|
|
if (G_LIKELY (lines > 0)) {
|
|
for (j = 0, k = 0; j < (r_v * DCTSIZE); j += r_v, k++) {
|
|
if (G_LIKELY (base[0] <= last[0])) {
|
|
memcpy (base[0], y_rows[j], rowsize[0]);
|
|
base[0] += stride[0];
|
|
}
|
|
if (r_v == 2) {
|
|
if (G_LIKELY (base[0] <= last[0])) {
|
|
memcpy (base[0], y_rows[j + 1], rowsize[0]);
|
|
base[0] += stride[0];
|
|
}
|
|
}
|
|
if (G_LIKELY (base[1] <= last[1] && base[2] <= last[2])) {
|
|
if (r_h == 2) {
|
|
memcpy (base[1], u_rows[k], rowsize[1]);
|
|
memcpy (base[2], v_rows[k], rowsize[2]);
|
|
} else if (r_h == 1) {
|
|
hresamplecpy1 (base[1], u_rows[k], rowsize[1]);
|
|
hresamplecpy1 (base[2], v_rows[k], rowsize[2]);
|
|
} else {
|
|
/* FIXME: implement (at least we avoid crashing by doing nothing) */
|
|
}
|
|
}
|
|
|
|
if (r_v == 2 || (k & 1) != 0) {
|
|
base[1] += stride[1];
|
|
base[2] += stride[2];
|
|
}
|
|
}
|
|
} else {
|
|
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
|
|
}
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_jpeg_dec_decode_direct (GstJpegDec * dec, GstVideoFrame * frame,
|
|
guint field, guint num_fields)
|
|
{
|
|
guchar **line[3]; /* the jpeg line buffer */
|
|
guchar *y[4 * DCTSIZE] = { NULL, }; /* alloc enough for the lines */
|
|
guchar *u[4 * DCTSIZE] = { NULL, }; /* r_v will be <4 */
|
|
guchar *v[4 * DCTSIZE] = { NULL, };
|
|
gint i, j;
|
|
gint lines, v_samp[3];
|
|
guchar *base[3], *last[3];
|
|
gint stride[3];
|
|
guint height;
|
|
|
|
line[0] = y;
|
|
line[1] = u;
|
|
line[2] = v;
|
|
|
|
v_samp[0] = dec->cinfo.comp_info[0].v_samp_factor;
|
|
v_samp[1] = dec->cinfo.comp_info[1].v_samp_factor;
|
|
v_samp[2] = dec->cinfo.comp_info[2].v_samp_factor;
|
|
|
|
if (G_UNLIKELY (v_samp[0] > 2 || v_samp[1] > 2 || v_samp[2] > 2))
|
|
goto format_not_supported;
|
|
|
|
height = GST_VIDEO_FRAME_HEIGHT (frame);
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
base[i] = GST_VIDEO_FRAME_COMP_DATA (frame, i);
|
|
stride[i] = GST_VIDEO_FRAME_COMP_STRIDE (frame, i) * num_fields;
|
|
/* make sure we don't make jpeglib write beyond our buffer,
|
|
* which might happen if (height % (r_v*DCTSIZE)) != 0 */
|
|
last[i] = base[i] + (GST_VIDEO_FRAME_COMP_STRIDE (frame, i) *
|
|
(GST_VIDEO_FRAME_COMP_HEIGHT (frame, i) - 1));
|
|
|
|
if (field == 2) {
|
|
base[i] += GST_VIDEO_FRAME_COMP_STRIDE (frame, i);
|
|
}
|
|
}
|
|
|
|
if (height % (v_samp[0] * DCTSIZE) && (dec->scratch_size < stride[0])) {
|
|
g_free (dec->scratch);
|
|
dec->scratch = g_malloc (stride[0]);
|
|
dec->scratch_size = stride[0];
|
|
}
|
|
|
|
/* let jpeglib decode directly into our final buffer */
|
|
GST_DEBUG_OBJECT (dec, "decoding directly into output buffer");
|
|
|
|
for (i = 0; i < height; i += v_samp[0] * DCTSIZE) {
|
|
for (j = 0; j < (v_samp[0] * DCTSIZE); ++j) {
|
|
/* Y */
|
|
line[0][j] = base[0] + (i + j) * stride[0];
|
|
if (G_UNLIKELY (line[0][j] > last[0]))
|
|
line[0][j] = dec->scratch;
|
|
/* U */
|
|
if (v_samp[1] == v_samp[0]) {
|
|
line[1][j] = base[1] + ((i + j) / 2) * stride[1];
|
|
} else if (j < (v_samp[1] * DCTSIZE)) {
|
|
line[1][j] = base[1] + ((i / 2) + j) * stride[1];
|
|
}
|
|
if (G_UNLIKELY (line[1][j] > last[1]))
|
|
line[1][j] = dec->scratch;
|
|
/* V */
|
|
if (v_samp[2] == v_samp[0]) {
|
|
line[2][j] = base[2] + ((i + j) / 2) * stride[2];
|
|
} else if (j < (v_samp[2] * DCTSIZE)) {
|
|
line[2][j] = base[2] + ((i / 2) + j) * stride[2];
|
|
}
|
|
if (G_UNLIKELY (line[2][j] > last[2]))
|
|
line[2][j] = dec->scratch;
|
|
}
|
|
|
|
lines = jpeg_read_raw_data (&dec->cinfo, line, v_samp[0] * DCTSIZE);
|
|
if (G_UNLIKELY (!lines)) {
|
|
GST_INFO_OBJECT (dec, "jpeg_read_raw_data() returned 0");
|
|
}
|
|
}
|
|
return GST_FLOW_OK;
|
|
|
|
format_not_supported:
|
|
{
|
|
gboolean ret = GST_FLOW_OK;
|
|
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")),
|
|
("Unsupported subsampling schema: v_samp factors: %u %u %u", v_samp[0],
|
|
v_samp[1], v_samp[2]), ret);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_negotiate (GstJpegDec * dec, gint width, gint height, gint clrspc,
|
|
gboolean interlaced)
|
|
{
|
|
GstVideoCodecState *outstate;
|
|
GstVideoInfo *info;
|
|
GstVideoFormat format;
|
|
|
|
switch (clrspc) {
|
|
case JCS_RGB:
|
|
format = GST_VIDEO_FORMAT_RGB;
|
|
break;
|
|
case JCS_GRAYSCALE:
|
|
format = GST_VIDEO_FORMAT_GRAY8;
|
|
break;
|
|
default:
|
|
format = GST_VIDEO_FORMAT_I420;
|
|
break;
|
|
}
|
|
|
|
/* Compare to currently configured output state */
|
|
outstate = gst_video_decoder_get_output_state (GST_VIDEO_DECODER (dec));
|
|
if (outstate) {
|
|
info = &outstate->info;
|
|
|
|
if (width == GST_VIDEO_INFO_WIDTH (info) &&
|
|
height == GST_VIDEO_INFO_HEIGHT (info) &&
|
|
format == GST_VIDEO_INFO_FORMAT (info)) {
|
|
gst_video_codec_state_unref (outstate);
|
|
return;
|
|
}
|
|
gst_video_codec_state_unref (outstate);
|
|
}
|
|
|
|
outstate =
|
|
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec), format,
|
|
width, height, dec->input_state);
|
|
|
|
switch (clrspc) {
|
|
case JCS_RGB:
|
|
case JCS_GRAYSCALE:
|
|
break;
|
|
default:
|
|
/* aka JPEG chroma siting */
|
|
outstate->info.chroma_site = GST_VIDEO_CHROMA_SITE_NONE;
|
|
|
|
outstate->info.colorimetry.range = GST_VIDEO_COLOR_RANGE_0_255;
|
|
outstate->info.colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT601;
|
|
outstate->info.colorimetry.transfer = GST_VIDEO_TRANSFER_UNKNOWN;
|
|
outstate->info.colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
if (interlaced) {
|
|
outstate->info.interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
|
|
GST_VIDEO_INFO_FIELD_ORDER (&outstate->info) =
|
|
GST_VIDEO_FIELD_ORDER_TOP_FIELD_FIRST;
|
|
}
|
|
|
|
gst_video_codec_state_unref (outstate);
|
|
|
|
gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
|
|
|
|
GST_DEBUG_OBJECT (dec, "max_v_samp_factor=%d", dec->cinfo.max_v_samp_factor);
|
|
GST_DEBUG_OBJECT (dec, "max_h_samp_factor=%d", dec->cinfo.max_h_samp_factor);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_jpeg_dec_prepare_decode (GstJpegDec * dec)
|
|
{
|
|
G_GNUC_UNUSED GstFlowReturn ret;
|
|
guint r_h, r_v, hdr_ok;
|
|
|
|
/* read header */
|
|
hdr_ok = jpeg_read_header (&dec->cinfo, TRUE);
|
|
if (G_UNLIKELY (hdr_ok != JPEG_HEADER_OK)) {
|
|
GST_WARNING_OBJECT (dec, "reading the header failed, %d", hdr_ok);
|
|
}
|
|
|
|
GST_LOG_OBJECT (dec, "num_components=%d", dec->cinfo.num_components);
|
|
GST_LOG_OBJECT (dec, "jpeg_color_space=%d", dec->cinfo.jpeg_color_space);
|
|
|
|
if (!dec->cinfo.num_components || !dec->cinfo.comp_info)
|
|
goto components_not_supported;
|
|
|
|
r_h = dec->cinfo.comp_info[0].h_samp_factor;
|
|
r_v = dec->cinfo.comp_info[0].v_samp_factor;
|
|
|
|
GST_LOG_OBJECT (dec, "r_h = %d, r_v = %d", r_h, r_v);
|
|
|
|
if (dec->cinfo.num_components > 3)
|
|
goto components_not_supported;
|
|
|
|
/* verify color space expectation to avoid going *boom* or bogus output */
|
|
if (dec->cinfo.jpeg_color_space != JCS_YCbCr &&
|
|
dec->cinfo.jpeg_color_space != JCS_GRAYSCALE &&
|
|
dec->cinfo.jpeg_color_space != JCS_RGB)
|
|
goto unsupported_colorspace;
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
{
|
|
gint i;
|
|
|
|
for (i = 0; i < dec->cinfo.num_components; ++i) {
|
|
GST_LOG_OBJECT (dec, "[%d] h_samp_factor=%d, v_samp_factor=%d, cid=%d",
|
|
i, dec->cinfo.comp_info[i].h_samp_factor,
|
|
dec->cinfo.comp_info[i].v_samp_factor,
|
|
dec->cinfo.comp_info[i].component_id);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* prepare for raw output */
|
|
dec->cinfo.do_fancy_upsampling = FALSE;
|
|
dec->cinfo.do_block_smoothing = FALSE;
|
|
dec->cinfo.out_color_space = dec->cinfo.jpeg_color_space;
|
|
dec->cinfo.dct_method = dec->idct_method;
|
|
dec->cinfo.raw_data_out = TRUE;
|
|
|
|
GST_LOG_OBJECT (dec, "starting decompress");
|
|
guarantee_huff_tables (&dec->cinfo);
|
|
if (!jpeg_start_decompress (&dec->cinfo)) {
|
|
GST_WARNING_OBJECT (dec, "failed to start decompression cycle");
|
|
}
|
|
|
|
/* sanity checks to get safe and reasonable output */
|
|
switch (dec->cinfo.jpeg_color_space) {
|
|
case JCS_GRAYSCALE:
|
|
if (dec->cinfo.num_components != 1)
|
|
goto invalid_yuvrgbgrayscale;
|
|
break;
|
|
case JCS_RGB:
|
|
if (dec->cinfo.num_components != 3 || dec->cinfo.max_v_samp_factor > 1 ||
|
|
dec->cinfo.max_h_samp_factor > 1)
|
|
goto invalid_yuvrgbgrayscale;
|
|
break;
|
|
case JCS_YCbCr:
|
|
if (dec->cinfo.num_components != 3 ||
|
|
r_v > 2 || r_v < dec->cinfo.comp_info[0].v_samp_factor ||
|
|
r_v < dec->cinfo.comp_info[1].v_samp_factor ||
|
|
r_h < dec->cinfo.comp_info[0].h_samp_factor ||
|
|
r_h < dec->cinfo.comp_info[1].h_samp_factor)
|
|
goto invalid_yuvrgbgrayscale;
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
if (G_UNLIKELY (dec->cinfo.output_width < MIN_WIDTH ||
|
|
dec->cinfo.output_width > MAX_WIDTH ||
|
|
dec->cinfo.output_height < MIN_HEIGHT ||
|
|
dec->cinfo.output_height > MAX_HEIGHT))
|
|
goto wrong_size;
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
wrong_size:
|
|
{
|
|
ret = GST_FLOW_ERROR;
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")),
|
|
("Picture is too small or too big (%ux%u)", dec->cinfo.output_width,
|
|
dec->cinfo.output_height), ret);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
components_not_supported:
|
|
{
|
|
ret = GST_FLOW_ERROR;
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")),
|
|
("number of components not supported: %d (max 3)",
|
|
dec->cinfo.num_components), ret);
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
unsupported_colorspace:
|
|
{
|
|
ret = GST_FLOW_ERROR;
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")),
|
|
("Picture has unknown or unsupported colourspace"), ret);
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
invalid_yuvrgbgrayscale:
|
|
{
|
|
ret = GST_FLOW_ERROR;
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")),
|
|
("Picture is corrupt or unhandled YUV/RGB/grayscale layout"), ret);
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_jpeg_dec_decode (GstJpegDec * dec, GstVideoFrame * vframe, guint width,
|
|
guint height, guint field, guint num_fields)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
if (dec->cinfo.jpeg_color_space == JCS_RGB) {
|
|
gst_jpeg_dec_decode_rgb (dec, vframe, field, num_fields);
|
|
} else if (dec->cinfo.jpeg_color_space == JCS_GRAYSCALE) {
|
|
gst_jpeg_dec_decode_grayscale (dec, vframe, field, num_fields);
|
|
} else {
|
|
GST_LOG_OBJECT (dec, "decompressing (required scanline buffer height = %u)",
|
|
dec->cinfo.rec_outbuf_height);
|
|
|
|
/* For some widths jpeglib requires more horizontal padding than I420
|
|
* provides. In those cases we need to decode into separate buffers and then
|
|
* copy over the data into our final picture buffer, otherwise jpeglib might
|
|
* write over the end of a line into the beginning of the next line,
|
|
* resulting in blocky artifacts on the left side of the picture. */
|
|
if (G_UNLIKELY (width % (dec->cinfo.max_h_samp_factor * DCTSIZE) != 0
|
|
|| dec->cinfo.comp_info[0].h_samp_factor != 2
|
|
|| dec->cinfo.comp_info[1].h_samp_factor != 1
|
|
|| dec->cinfo.comp_info[2].h_samp_factor != 1)) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_PERFORMANCE, dec,
|
|
"indirect decoding using extra buffer copy");
|
|
gst_jpeg_dec_decode_indirect (dec, vframe,
|
|
dec->cinfo.comp_info[0].v_samp_factor,
|
|
dec->cinfo.comp_info[0].h_samp_factor, dec->cinfo.num_components,
|
|
field, num_fields);
|
|
} else {
|
|
ret = gst_jpeg_dec_decode_direct (dec, vframe, field, num_fields);
|
|
}
|
|
}
|
|
|
|
GST_LOG_OBJECT (dec, "decompressing finished: %s", gst_flow_get_name (ret));
|
|
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
} else {
|
|
jpeg_finish_decompress (&dec->cinfo);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstJpegDec *dec = (GstJpegDec *) bdec;
|
|
GstVideoFrame vframe;
|
|
gint num_fields; /* number of fields (1 or 2) */
|
|
gint output_height; /* height of output image (one or two fields) */
|
|
gint height; /* height of current frame (whole image or a field) */
|
|
gint width;
|
|
guint code;
|
|
gboolean need_unmap = TRUE;
|
|
GstVideoCodecState *state = NULL;
|
|
gboolean release_frame = TRUE;
|
|
gboolean has_eoi;
|
|
guint8 *data;
|
|
gsize nbytes;
|
|
|
|
if (!gst_buffer_map (frame->input_buffer, &dec->current_frame_map,
|
|
GST_MAP_READ))
|
|
goto map_failed;
|
|
|
|
data = dec->current_frame_map.data;
|
|
nbytes = dec->current_frame_map.size;
|
|
if (nbytes < 2)
|
|
goto need_more_data;
|
|
has_eoi = ((data[nbytes - 2] == 0xff) && (data[nbytes - 1] == 0xd9));
|
|
|
|
/* some cameras fail to send an end-of-image marker (EOI),
|
|
* add it if that is the case. */
|
|
if (!has_eoi) {
|
|
GstMapInfo map;
|
|
GstBuffer *eoibuf = gst_buffer_new_and_alloc (2);
|
|
|
|
/* unmap, will add EOI and remap at the end */
|
|
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
|
|
|
|
gst_buffer_map (eoibuf, &map, GST_MAP_WRITE);
|
|
map.data[0] = 0xff;
|
|
map.data[1] = 0xd9;
|
|
gst_buffer_unmap (eoibuf, &map);
|
|
|
|
/* append to input buffer, and remap */
|
|
frame->input_buffer = gst_buffer_append (frame->input_buffer, eoibuf);
|
|
|
|
gst_buffer_map (frame->input_buffer, &dec->current_frame_map, GST_MAP_READ);
|
|
GST_DEBUG ("fixup EOI marker added");
|
|
}
|
|
|
|
dec->current_frame = frame;
|
|
dec->cinfo.src->next_input_byte = dec->current_frame_map.data;
|
|
dec->cinfo.src->bytes_in_buffer = dec->current_frame_map.size;
|
|
|
|
if (setjmp (dec->jerr.setjmp_buffer)) {
|
|
code = dec->jerr.pub.msg_code;
|
|
|
|
if (code == JERR_INPUT_EOF) {
|
|
GST_DEBUG ("jpeg input EOF error, we probably need more data");
|
|
goto need_more_data;
|
|
}
|
|
goto decode_error;
|
|
}
|
|
|
|
/* read header and check values */
|
|
ret = gst_jpeg_dec_prepare_decode (dec);
|
|
if (G_UNLIKELY (ret == GST_FLOW_ERROR))
|
|
goto done;
|
|
|
|
width = dec->cinfo.output_width;
|
|
height = dec->cinfo.output_height;
|
|
|
|
/* is it interlaced MJPEG? (we really don't want to scan the jpeg data
|
|
* to see if there are two SOF markers in the packet to detect this) */
|
|
if (gst_video_decoder_get_packetized (bdec) &&
|
|
dec->input_state &&
|
|
dec->input_state->info.height > height &&
|
|
dec->input_state->info.height <= (height * 2)
|
|
&& dec->input_state->info.width == width) {
|
|
GST_LOG_OBJECT (dec,
|
|
"looks like an interlaced image: "
|
|
"input width/height of %dx%d with JPEG frame width/height of %dx%d",
|
|
dec->input_state->info.width, dec->input_state->info.height, width,
|
|
height);
|
|
output_height = dec->input_state->info.height;
|
|
height = dec->input_state->info.height / 2;
|
|
num_fields = 2;
|
|
GST_LOG_OBJECT (dec, "field height=%d", height);
|
|
} else {
|
|
output_height = height;
|
|
num_fields = 1;
|
|
}
|
|
|
|
gst_jpeg_dec_negotiate (dec, width, output_height,
|
|
dec->cinfo.jpeg_color_space, num_fields == 2);
|
|
|
|
state = gst_video_decoder_get_output_state (bdec);
|
|
ret = gst_video_decoder_allocate_output_frame (bdec, frame);
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK))
|
|
goto alloc_failed;
|
|
|
|
if (!gst_video_frame_map (&vframe, &state->info, frame->output_buffer,
|
|
GST_MAP_READWRITE))
|
|
goto alloc_failed;
|
|
|
|
if (setjmp (dec->jerr.setjmp_buffer)) {
|
|
code = dec->jerr.pub.msg_code;
|
|
gst_video_frame_unmap (&vframe);
|
|
goto decode_error;
|
|
}
|
|
|
|
GST_LOG_OBJECT (dec, "width %d, height %d, fields %d", width, output_height,
|
|
num_fields);
|
|
|
|
ret = gst_jpeg_dec_decode (dec, &vframe, width, height, 1, num_fields);
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
|
|
gst_video_frame_unmap (&vframe);
|
|
goto decode_failed;
|
|
}
|
|
|
|
if (setjmp (dec->jerr.setjmp_buffer)) {
|
|
code = dec->jerr.pub.msg_code;
|
|
gst_video_frame_unmap (&vframe);
|
|
goto decode_error;
|
|
}
|
|
|
|
/* decode second field if there is one */
|
|
if (num_fields == 2) {
|
|
GstVideoFormat field2_format;
|
|
|
|
/* Checked above before setting num_fields to 2 */
|
|
g_assert (dec->input_state != NULL);
|
|
|
|
/* skip any chunk or padding bytes before the next SOI marker; both fields
|
|
* are in one single buffer here, so direct access should be fine here */
|
|
while (dec->jsrc.pub.bytes_in_buffer > 2 &&
|
|
GST_READ_UINT16_BE (dec->jsrc.pub.next_input_byte) != 0xffd8) {
|
|
--dec->jsrc.pub.bytes_in_buffer;
|
|
++dec->jsrc.pub.next_input_byte;
|
|
}
|
|
|
|
if (gst_jpeg_dec_prepare_decode (dec) != GST_FLOW_OK) {
|
|
GST_WARNING_OBJECT (dec, "problem reading jpeg header of 2nd field");
|
|
/* FIXME: post a warning message here? */
|
|
gst_video_frame_unmap (&vframe);
|
|
goto decode_failed;
|
|
}
|
|
|
|
/* check if format has changed for the second field */
|
|
switch (dec->cinfo.jpeg_color_space) {
|
|
case JCS_RGB:
|
|
field2_format = GST_VIDEO_FORMAT_RGB;
|
|
break;
|
|
case JCS_GRAYSCALE:
|
|
field2_format = GST_VIDEO_FORMAT_GRAY8;
|
|
break;
|
|
default:
|
|
field2_format = GST_VIDEO_FORMAT_I420;
|
|
break;
|
|
}
|
|
|
|
GST_LOG_OBJECT (dec,
|
|
"got for second field of interlaced image: "
|
|
"input width/height of %dx%d with JPEG frame width/height of %dx%d",
|
|
dec->input_state->info.width, dec->input_state->info.height,
|
|
dec->cinfo.output_width, dec->cinfo.output_height);
|
|
|
|
if (dec->cinfo.output_width != GST_VIDEO_INFO_WIDTH (&state->info) ||
|
|
GST_VIDEO_INFO_HEIGHT (&state->info) <= dec->cinfo.output_height ||
|
|
GST_VIDEO_INFO_HEIGHT (&state->info) > (dec->cinfo.output_height * 2) ||
|
|
field2_format != GST_VIDEO_INFO_FORMAT (&state->info)) {
|
|
GST_WARNING_OBJECT (dec, "second field has different format than first");
|
|
gst_video_frame_unmap (&vframe);
|
|
goto decode_failed;
|
|
}
|
|
|
|
ret = gst_jpeg_dec_decode (dec, &vframe, width, height, 2, 2);
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
|
|
gst_video_frame_unmap (&vframe);
|
|
goto decode_failed;
|
|
}
|
|
}
|
|
gst_video_frame_unmap (&vframe);
|
|
|
|
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
|
|
ret = gst_video_decoder_finish_frame (bdec, frame);
|
|
release_frame = FALSE;
|
|
need_unmap = FALSE;
|
|
|
|
done:
|
|
|
|
exit:
|
|
|
|
if (need_unmap)
|
|
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
|
|
|
|
if (release_frame)
|
|
gst_video_decoder_release_frame (bdec, frame);
|
|
|
|
if (state)
|
|
gst_video_codec_state_unref (state);
|
|
|
|
return ret;
|
|
|
|
/* special cases */
|
|
need_more_data:
|
|
{
|
|
GST_LOG_OBJECT (dec, "we need more data");
|
|
ret = GST_FLOW_OK;
|
|
goto exit;
|
|
}
|
|
/* ERRORS */
|
|
map_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (dec, RESOURCE, READ, (_("Failed to read memory")),
|
|
("gst_buffer_map() failed for READ access"));
|
|
ret = GST_FLOW_ERROR;
|
|
goto exit;
|
|
}
|
|
decode_error:
|
|
{
|
|
gchar err_msg[JMSG_LENGTH_MAX];
|
|
|
|
dec->jerr.pub.format_message ((j_common_ptr) (&dec->cinfo), err_msg);
|
|
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")), ("Decode error #%u: %s", code,
|
|
err_msg), ret);
|
|
|
|
gst_buffer_unmap (frame->input_buffer, &dec->current_frame_map);
|
|
gst_video_decoder_drop_frame (bdec, frame);
|
|
release_frame = FALSE;
|
|
need_unmap = FALSE;
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
|
|
goto done;
|
|
}
|
|
decode_failed:
|
|
{
|
|
/* already posted an error message */
|
|
goto done;
|
|
}
|
|
alloc_failed:
|
|
{
|
|
const gchar *reason;
|
|
|
|
reason = gst_flow_get_name (ret);
|
|
|
|
GST_DEBUG_OBJECT (dec, "failed to alloc buffer, reason %s", reason);
|
|
/* Reset for next time */
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
if (ret != GST_FLOW_EOS && ret != GST_FLOW_FLUSHING &&
|
|
ret != GST_FLOW_NOT_LINKED) {
|
|
GST_VIDEO_DECODER_ERROR (dec, 1, STREAM, DECODE,
|
|
(_("Failed to decode JPEG image")),
|
|
("Buffer allocation failed, reason: %s", reason), ret);
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
}
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_jpeg_dec_decide_allocation (GstVideoDecoder * bdec, GstQuery * query)
|
|
{
|
|
GstBufferPool *pool = NULL;
|
|
GstStructure *config;
|
|
|
|
if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (bdec, query))
|
|
return FALSE;
|
|
|
|
if (gst_query_get_n_allocation_pools (query) > 0)
|
|
gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
|
|
|
|
if (pool == NULL)
|
|
return FALSE;
|
|
|
|
config = gst_buffer_pool_get_config (pool);
|
|
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
|
|
gst_buffer_pool_config_add_option (config,
|
|
GST_BUFFER_POOL_OPTION_VIDEO_META);
|
|
}
|
|
gst_buffer_pool_set_config (pool, config);
|
|
gst_object_unref (pool);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_jpeg_dec_sink_event (GstVideoDecoder * bdec, GstEvent * event)
|
|
{
|
|
const GstSegment *segment;
|
|
|
|
if (GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT)
|
|
goto done;
|
|
|
|
gst_event_parse_segment (event, &segment);
|
|
|
|
if (segment->format == GST_FORMAT_TIME)
|
|
gst_video_decoder_set_packetized (bdec, TRUE);
|
|
else
|
|
gst_video_decoder_set_packetized (bdec, FALSE);
|
|
|
|
done:
|
|
return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (bdec, event);
|
|
}
|
|
|
|
static gboolean
|
|
gst_jpeg_dec_start (GstVideoDecoder * bdec)
|
|
{
|
|
GstJpegDec *dec = (GstJpegDec *) bdec;
|
|
|
|
dec->saw_header = FALSE;
|
|
dec->parse_entropy_len = 0;
|
|
dec->parse_resync = FALSE;
|
|
|
|
gst_video_decoder_set_packetized (bdec, FALSE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_jpeg_dec_flush (GstVideoDecoder * bdec)
|
|
{
|
|
GstJpegDec *dec = (GstJpegDec *) bdec;
|
|
|
|
jpeg_abort_decompress (&dec->cinfo);
|
|
dec->parse_entropy_len = 0;
|
|
dec->parse_resync = FALSE;
|
|
dec->saw_header = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstJpegDec *dec;
|
|
|
|
dec = GST_JPEG_DEC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_IDCT_METHOD:
|
|
dec->idct_method = g_value_get_enum (value);
|
|
break;
|
|
#ifndef GST_REMOVE_DEPRECATED
|
|
case PROP_MAX_ERRORS:
|
|
g_atomic_int_set (&dec->max_errors, g_value_get_int (value));
|
|
break;
|
|
#endif
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_jpeg_dec_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstJpegDec *dec;
|
|
|
|
dec = GST_JPEG_DEC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_IDCT_METHOD:
|
|
g_value_set_enum (value, dec->idct_method);
|
|
break;
|
|
#ifndef GST_REMOVE_DEPRECATED
|
|
case PROP_MAX_ERRORS:
|
|
g_value_set_int (value, g_atomic_int_get (&dec->max_errors));
|
|
break;
|
|
#endif
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_jpeg_dec_stop (GstVideoDecoder * bdec)
|
|
{
|
|
GstJpegDec *dec = (GstJpegDec *) bdec;
|
|
|
|
gst_jpeg_dec_free_buffers (dec);
|
|
|
|
g_free (dec->scratch);
|
|
dec->scratch = NULL;
|
|
dec->scratch_size = 0;
|
|
|
|
return TRUE;
|
|
}
|