mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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360 lines
11 KiB
C++
360 lines
11 KiB
C++
/* GStreamer
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* Copyright (C) 2004 David A. Schleef <ds@schleef.org>
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* Copyright (C) 2004 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 <gst/video/video.h>
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#include "gstdiracdec.h"
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GST_DEBUG_CATEGORY (diracdec_debug);
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#define GST_CAT_DEFAULT diracdec_debug
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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/* FILL ME */
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};
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static void gst_diracdec_base_init (gpointer g_class);
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static void gst_diracdec_class_init (GstDiracDec * klass);
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static void gst_diracdec_init (GstDiracDec * diracdec);
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static void gst_diracdec_dispose (GObject * object);
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static void gst_diracdec_chain (GstPad * pad, GstData * data);
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static GstStateChangeReturn gst_diracdec_change_state (GstElement * element,
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GstStateChange transition);
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static GstElementClass *parent_class = NULL;
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/*static guint gst_diracdec_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_diracdec_get_type (void)
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{
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static GType diracdec_type = 0;
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if (!diracdec_type) {
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static const GTypeInfo diracdec_info = {
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sizeof (GstDiracDecClass),
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gst_diracdec_base_init,
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NULL,
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(GClassInitFunc) gst_diracdec_class_init,
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NULL,
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NULL,
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sizeof (GstDiracDec),
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0,
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(GInstanceInitFunc) gst_diracdec_init,
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};
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diracdec_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstDiracDec", &diracdec_info,
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(GTypeFlags) 0);
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}
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return diracdec_type;
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}
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static GstStaticPadTemplate gst_diracdec_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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/* FIXME: 444 (planar? packed?), 411 (Y41B? Y41P?) */
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GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YUY2, Y800 }"))
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);
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static GstStaticPadTemplate gst_diracdec_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 ("video/x-dirac")
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);
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static void
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gst_diracdec_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_diracdec_src_pad_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_diracdec_sink_pad_template));
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gst_element_class_set_details_simple (element_class, "Dirac stream decoder",
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"Codec/Decoder/Video", "Decode DIRAC streams",
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"David Schleef <ds@schleef.org>, "
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"Ronald Bultje <rbultje@ronald.bitfreak.net>");
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}
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static void
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gst_diracdec_class_init (GstDiracDec * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
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gobject_class->dispose = gst_diracdec_dispose;
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element_class->change_state = gst_diracdec_change_state;
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GST_DEBUG_CATEGORY_INIT (diracdec_debug, "diracdec", 0, "DIRAC decoder");
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}
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static void
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gst_diracdec_dispose (GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_diracdec_init (GstDiracDec * diracdec)
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{
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GST_DEBUG ("gst_diracdec_init: initializing");
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/* create the sink and src pads */
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diracdec->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_diracdec_sink_pad_template), "sink");
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gst_pad_set_chain_function (diracdec->sinkpad, gst_diracdec_chain);
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gst_element_add_pad (GST_ELEMENT (diracdec), diracdec->sinkpad);
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diracdec->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_diracdec_src_pad_template), "src");
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gst_pad_use_explicit_caps (diracdec->srcpad);
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gst_element_add_pad (GST_ELEMENT (diracdec), diracdec->srcpad);
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/* no capsnego done yet */
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diracdec->width = -1;
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diracdec->height = -1;
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diracdec->fps = 0;
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diracdec->fcc = 0;
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}
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static guint32
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gst_diracdec_chroma_to_fourcc (dirac_chroma_t chroma)
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{
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guint32 fourcc = 0;
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switch (chroma) {
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case Yonly:
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fourcc = GST_MAKE_FOURCC ('Y', '8', '0', '0');
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break;
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case format422:
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fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
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break;
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/* planar? */
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case format420:
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case format444:
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case format411:
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default:
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break;
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}
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return fourcc;
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}
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static gboolean
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gst_diracdec_link (GstDiracDec * diracdec,
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gint width, gint height, gdouble fps, guint32 fourcc)
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{
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GstCaps *caps;
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if (width == diracdec->width &&
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height == diracdec->height &&
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fps == diracdec->fps && fourcc == diracdec->fcc) {
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return TRUE;
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}
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if (!fourcc) {
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g_warning ("Chroma not supported\n");
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return FALSE;
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}
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caps = gst_caps_new_simple ("video/x-raw-yuv",
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"width", G_TYPE_INT, width,
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"height", G_TYPE_INT, height,
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"format", GST_TYPE_FOURCC, fourcc, "framerate", G_TYPE_DOUBLE, fps, NULL);
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if (gst_pad_set_explicit_caps (diracdec->srcpad, caps)) {
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diracdec->width = width;
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diracdec->height = height;
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switch (fourcc) {
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case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
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diracdec->size = width * height * 2;
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break;
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case GST_MAKE_FOURCC ('Y', '8', '0', '0'):
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diracdec->size = width * height;
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break;
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}
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diracdec->fcc = fourcc;
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diracdec->fps = fps;
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return TRUE;
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}
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return FALSE;
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}
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static void
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gst_diracdec_chain (GstPad * pad, GstData * _data)
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{
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GstDiracDec *diracdec = GST_DIRACDEC (gst_pad_get_parent (pad));
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GstBuffer *buf = GST_BUFFER (_data), *out;
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gboolean c = TRUE;
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/* get state and do something */
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while (c) {
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switch (dirac_parse (diracdec->decoder)) {
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case STATE_BUFFER:
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if (buf) {
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/* provide data to decoder */
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dirac_buffer (diracdec->decoder, GST_BUFFER_DATA (buf),
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GST_BUFFER_DATA (buf) + GST_BUFFER_SIZE (buf));
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gst_buffer_unref (buf);
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buf = NULL;
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} else {
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/* need more data */
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c = FALSE;
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}
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break;
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case STATE_SEQUENCE:{
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guint8 *buf[3];
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gint fps_num, fps_denom;
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fps_num = diracdec->decoder->seq_params.frame_rate.numerator;
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fps_denom = diracdec->decoder->seq_params.frame_rate.denominator;
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/* start-of-sequence - allocate buffer */
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if (!gst_diracdec_link (diracdec,
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diracdec->decoder->seq_params.width,
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diracdec->decoder->seq_params.height,
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(gdouble) fps_num / (gdouble) fps_denom,
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gst_diracdec_chroma_to_fourcc (diracdec->decoder->
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seq_params.chroma))) {
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GST_ELEMENT_ERROR (diracdec, CORE, NEGOTIATION, (NULL),
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("Failed to set caps to %dx%d @ %d fps (format=" GST_FOURCC_FORMAT
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"/%d)", diracdec->decoder->seq_params.width,
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diracdec->decoder->seq_params.height,
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diracdec->decoder->seq_params.frame_rate,
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gst_diracdec_chroma_to_fourcc (diracdec->decoder->
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seq_params.chroma),
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diracdec->decoder->seq_params.chroma));
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c = FALSE;
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break;
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}
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g_free (diracdec->decoder->fbuf->buf[0]);
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g_free (diracdec->decoder->fbuf->buf[1]);
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g_free (diracdec->decoder->fbuf->buf[2]);
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buf[0] = (guchar *) g_malloc (diracdec->decoder->seq_params.width *
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diracdec->decoder->seq_params.height);
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if (diracdec->decoder->seq_params.chroma != Yonly) {
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buf[1] =
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(guchar *) g_malloc (diracdec->decoder->seq_params.chroma_width *
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diracdec->decoder->seq_params.chroma_height);
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buf[2] =
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(guchar *) g_malloc (diracdec->decoder->seq_params.chroma_width *
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diracdec->decoder->seq_params.chroma_height);
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}
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dirac_set_buf (diracdec->decoder, buf, NULL);
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break;
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}
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case STATE_SEQUENCE_END:
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/* end-of-sequence - free buffer */
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g_free (diracdec->decoder->fbuf->buf[0]);
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diracdec->decoder->fbuf->buf[0] = NULL;
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g_free (diracdec->decoder->fbuf->buf[1]);
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diracdec->decoder->fbuf->buf[1] = NULL;
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g_free (diracdec->decoder->fbuf->buf[2]);
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diracdec->decoder->fbuf->buf[2] = NULL;
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break;
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case STATE_PICTURE_START:
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/* start of one picture */
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break;
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case STATE_PICTURE_AVAIL:
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/* one picture is decoded */
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out = gst_pad_alloc_buffer (diracdec->srcpad, 0, diracdec->size);
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memcpy (GST_BUFFER_DATA (out), diracdec->decoder->fbuf->buf[0],
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diracdec->width * diracdec->height);
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if (diracdec->fcc != GST_MAKE_FOURCC ('Y', '8', '0', '0')) {
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memcpy (GST_BUFFER_DATA (out) + (diracdec->width *
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diracdec->height), diracdec->decoder->fbuf->buf[1],
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diracdec->decoder->seq_params.chroma_width *
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diracdec->decoder->seq_params.chroma_height);
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memcpy (GST_BUFFER_DATA (out) +
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(diracdec->decoder->seq_params.chroma_width *
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diracdec->decoder->seq_params.chroma_height) +
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(diracdec->width * diracdec->height),
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diracdec->decoder->fbuf->buf[2],
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diracdec->decoder->seq_params.chroma_width *
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diracdec->decoder->seq_params.chroma_height);
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}
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GST_BUFFER_TIMESTAMP (out) = (guint64) (GST_SECOND *
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diracdec->decoder->frame_params.fnum / diracdec->fps);
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GST_BUFFER_DURATION (out) = (guint64) (GST_SECOND / diracdec->fps);
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gst_pad_push (diracdec->srcpad, GST_DATA (out));
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break;
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case STATE_INVALID:
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default:
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GST_ELEMENT_ERROR (diracdec, LIBRARY, TOO_LAZY, (NULL), (NULL));
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c = FALSE;
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break;
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}
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}
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}
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static GstStateChangeReturn
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gst_diracdec_change_state (GstElement * element, GstStateChange transition)
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{
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GstDiracDec *diracdec = GST_DIRACDEC (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!(diracdec->decoder = dirac_decoder_init (0)))
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return GST_STATE_CHANGE_FAILURE;
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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dirac_decoder_close (diracdec->decoder);
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diracdec->width = diracdec->height = -1;
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diracdec->fps = 0.;
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diracdec->fcc = 0;
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break;
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default:
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break;
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}
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return parent_class->change_state (element, transition);
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}
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