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404 lines
11 KiB
C
404 lines
11 KiB
C
/* GStreamer xvid decoder plugin
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* Copyright (C) 2003 Ronald 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 <xvid.h>
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#include <gst/video/video.h>
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#include "gstxviddec.h"
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/* elementfactory information */
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GstElementDetails gst_xviddec_details = {
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"Xvid decoder",
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"Codec/Video/Decoder",
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"Xvid decoder based on xvidcore",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>",
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};
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static GstStaticPadTemplate sink_template =
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GST_STATIC_PAD_TEMPLATE (
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (
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"video/x-xvid, "
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"width = (int) [ 0, MAX ], "
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"height = (int) [ 0, MAX ], "
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"framerate = (double) [ 0, MAX ]"
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)
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);
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static GstStaticPadTemplate src_template =
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GST_STATIC_PAD_TEMPLATE (
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (
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GST_VIDEO_CAPS_YUV ("{ I420, YUY2, YV12, YVYU, UYVY }") "; "
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RGB_24_32_STATIC_CAPS (32, 0x00ff0000, 0x0000ff00, 0x000000ff) "; "
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RGB_24_32_STATIC_CAPS (32, 0xff000000, 0x00ff0000, 0x0000ff00) "; "
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RGB_24_32_STATIC_CAPS (32, 0x0000ff00, 0x00ff0000, 0xff000000) "; "
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RGB_24_32_STATIC_CAPS (32, 0x000000ff, 0x0000ff00, 0x00ff0000) "; "
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RGB_24_32_STATIC_CAPS (24, 0x0000ff, 0x00ff00, 0xff0000) "; "
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GST_VIDEO_CAPS_RGB_15 "; "
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GST_VIDEO_CAPS_RGB_16
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)
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);
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/* XvidDec signals and args */
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enum {
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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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ARG_0
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/* FILL ME */
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};
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static void gst_xviddec_base_init (gpointer g_class);
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static void gst_xviddec_class_init (GstXvidDecClass *klass);
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static void gst_xviddec_init (GstXvidDec *xviddec);
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static void gst_xviddec_chain (GstPad *pad,
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GstData *data);
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static GstPadLinkReturn
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gst_xviddec_sink_link (GstPad *pad,
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const GstCaps *vscapslist);
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static GstPadLinkReturn
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gst_xviddec_src_link (GstPad *pad,
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const GstCaps *vscapslist);
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static GstCaps *
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gst_xviddec_src_getcaps (GstPad *pad);
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static GstElementStateReturn
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gst_xviddec_change_state (GstElement *element);
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static GstElementClass *parent_class = NULL;
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/* static guint gst_xviddec_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_xviddec_get_type(void)
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{
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static GType xviddec_type = 0;
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if (!xviddec_type)
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{
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static const GTypeInfo xviddec_info = {
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sizeof(GstXvidDecClass),
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gst_xviddec_base_init,
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NULL,
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(GClassInitFunc) gst_xviddec_class_init,
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NULL,
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NULL,
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sizeof(GstXvidDec),
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0,
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(GInstanceInitFunc) gst_xviddec_init,
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};
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xviddec_type = g_type_register_static(GST_TYPE_ELEMENT,
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"GstXvidDec",
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&xviddec_info, 0);
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}
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return xviddec_type;
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}
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static void
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gst_xviddec_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 (&sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_details (element_class, &gst_xviddec_details);
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}
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static void
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gst_xviddec_class_init (GstXvidDecClass *klass)
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{
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
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gstelement_class->change_state = gst_xviddec_change_state;
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}
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static void
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gst_xviddec_init (GstXvidDec *xviddec)
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{
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gst_xvid_init();
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/* create the sink pad */
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xviddec->sinkpad = gst_pad_new_from_template(
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gst_static_pad_template_get (&sink_template),
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"sink");
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gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->sinkpad);
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gst_pad_set_chain_function(xviddec->sinkpad, gst_xviddec_chain);
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gst_pad_set_link_function(xviddec->sinkpad, gst_xviddec_sink_link);
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/* create the src pad */
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xviddec->srcpad = gst_pad_new_from_template(
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gst_static_pad_template_get (&src_template),
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"src");
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gst_element_add_pad(GST_ELEMENT(xviddec), xviddec->srcpad);
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gst_pad_set_getcaps_function (xviddec->srcpad, gst_xviddec_src_getcaps);
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gst_pad_set_link_function(xviddec->srcpad, gst_xviddec_src_link);
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/* size, etc. */
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xviddec->width = xviddec->height = xviddec->csp = -1;
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/* set xvid handle to NULL */
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xviddec->handle = NULL;
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}
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static void
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gst_xviddec_unset (GstXvidDec *xviddec)
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{
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/* unref this instance */
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xvid_decore(xviddec->handle, XVID_DEC_DESTROY, NULL, NULL);
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xviddec->handle = NULL;
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}
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static gboolean
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gst_xviddec_setup (GstXvidDec *xviddec)
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{
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xvid_dec_create_t xdec;
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int ret;
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/* initialise parameters, see xvid documentation */
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gst_xvid_init_struct (xdec);
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xdec.width = xviddec->width;
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xdec.height = xviddec->height;
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xdec.handle = NULL;
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if ((ret = xvid_decore(NULL, XVID_DEC_CREATE,
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&xdec, NULL)) < 0) {
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GST_ELEMENT_ERROR (xviddec, LIBRARY, SETTINGS, NULL,
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("Setting parameters %dx%d@%d failed: %s (%d)",
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xviddec->width, xviddec->height, xviddec->csp,
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gst_xvid_error(ret), ret));
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return FALSE;
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}
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xviddec->handle = xdec.handle;
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return TRUE;
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}
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static void
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gst_xviddec_chain (GstPad *pad,
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GstData *_data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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GstXvidDec *xviddec = GST_XVIDDEC(GST_OBJECT_PARENT(pad));
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GstBuffer *outbuf;
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xvid_dec_frame_t xframe;
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int ret;
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g_return_if_fail(pad != NULL);
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g_return_if_fail(GST_IS_PAD(pad));
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if (!xviddec->handle) {
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GST_ELEMENT_ERROR (xviddec, CORE, NEGOTIATION, NULL,
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("format wasn't negotiated before chain function"));
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gst_buffer_unref(buf);
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return;
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}
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outbuf = gst_buffer_new_and_alloc(xviddec->width *
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xviddec->height *
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xviddec->bpp / 8);
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GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
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GST_BUFFER_DURATION(outbuf) = GST_BUFFER_DURATION(buf);
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GST_BUFFER_SIZE(outbuf) = xviddec->width *
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xviddec->height *
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xviddec->bpp / 8;
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/* decode and so ... */
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gst_xvid_init_struct (xframe);
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xframe.general = 0;
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xframe.bitstream = (void *) GST_BUFFER_DATA(buf);
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xframe.length = GST_BUFFER_SIZE(buf);
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xframe.output.csp = xviddec->csp;
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if (xviddec->width == xviddec->stride) {
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xframe.output.plane[0] = GST_BUFFER_DATA(outbuf);
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xframe.output.plane[1] = xframe.output.plane[0] + (xviddec->width * xviddec->height);
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xframe.output.plane[2] = xframe.output.plane[1] + (xviddec->width * xviddec->height / 4);
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xframe.output.stride[0] = xviddec->width;
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xframe.output.stride[1] = xviddec->width / 2;
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xframe.output.stride[2] = xviddec->width / 2;
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} else {
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xframe.output.plane[0] = GST_BUFFER_DATA(outbuf);
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xframe.output.stride[0] = xviddec->stride;
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}
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if ((ret = xvid_decore(xviddec->handle, XVID_DEC_DECODE,
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&xframe, NULL)) < 0) {
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GST_ELEMENT_ERROR (xviddec, STREAM, DECODE, NULL,
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("Error decoding xvid frame: %s (%d)\n",
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gst_xvid_error(ret), ret));
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gst_buffer_unref(buf);
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gst_buffer_unref(outbuf);
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return;
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}
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gst_pad_push(xviddec->srcpad, GST_DATA (outbuf));
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gst_buffer_unref(buf);
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}
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static GstCaps *
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gst_xviddec_src_getcaps (GstPad *pad)
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{
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GstXvidDec *xviddec = GST_XVIDDEC (gst_pad_get_parent (pad));
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GstCaps *caps;
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gint csp[] = {
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XVID_CSP_I420,
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XVID_CSP_YV12,
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XVID_CSP_YUY2,
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XVID_CSP_UYVY,
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XVID_CSP_YVYU,
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XVID_CSP_BGRA,
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XVID_CSP_ABGR,
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XVID_CSP_RGBA,
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#ifdef XVID_CSP_ARGB
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XVID_CSP_ARGB,
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#endif
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XVID_CSP_BGR,
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XVID_CSP_RGB555,
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XVID_CSP_RGB565,
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0
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}, i;
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if (!GST_PAD_CAPS (xviddec->sinkpad)) {
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GstPadTemplate *templ = gst_static_pad_template_get (&src_template);
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return gst_caps_copy (gst_pad_template_get_caps (templ));
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}
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caps = gst_caps_new_empty ();
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for (i = 0; csp[i] != 0; i++) {
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GstCaps *one = gst_xvid_csp_to_caps (csp[i], xviddec->width,
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xviddec->height, xviddec->fps);
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gst_caps_append (caps, one);
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}
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return caps;
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}
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static GstPadLinkReturn
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gst_xviddec_src_link (GstPad *pad,
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const GstCaps *vscaps)
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{
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GstXvidDec *xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
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GstStructure *structure = gst_caps_get_structure (vscaps, 0);
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if (!GST_PAD_CAPS (xviddec->sinkpad))
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return GST_PAD_LINK_DELAYED;
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/* if there's something old around, remove it */
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if (xviddec->handle) {
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gst_xviddec_unset(xviddec);
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}
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g_print ("out: %s\n", gst_caps_to_string (vscaps));
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xviddec->csp = gst_xvid_structure_to_csp (structure, xviddec->width,
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&xviddec->stride,
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&xviddec->bpp);
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if (xviddec->csp < 0)
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return GST_PAD_LINK_REFUSED;
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if (!gst_xviddec_setup(xviddec))
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return GST_PAD_LINK_REFUSED;;
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return GST_PAD_LINK_OK;
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}
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static GstPadLinkReturn
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gst_xviddec_sink_link (GstPad *pad,
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const GstCaps *vscaps)
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{
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GstXvidDec *xviddec = GST_XVIDDEC(gst_pad_get_parent (pad));
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GstStructure *structure;
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/* if there's something old around, remove it */
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if (xviddec->handle) {
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gst_xviddec_unset(xviddec);
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}
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/* if we get here, we know the input is xvid. we
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* only need to bother with the output colorspace,
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* which the src_link function takes care of. */
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structure = gst_caps_get_structure (vscaps, 0);
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gst_structure_get_int(structure, "width", &xviddec->width);
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gst_structure_get_int(structure, "height", &xviddec->height);
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gst_structure_get_double(structure, "framerate", &xviddec->fps);
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g_print ("in: %dx%d\n", xviddec->width, xviddec->height);
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/* re-nego? or just await src nego? */
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if (GST_PAD_CAPS(xviddec->srcpad)) {
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GstPadLinkReturn ret;
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GstCaps *vscaps = gst_pad_get_allowed_caps (xviddec->srcpad), *new;
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gint i, csp;
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for (i = 0; i < gst_caps_get_size (vscaps); i++) {
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csp = gst_xvid_structure_to_csp (gst_caps_get_structure (vscaps, i),
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0, NULL, NULL);
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new = gst_xvid_csp_to_caps (csp, xviddec->width, xviddec->height, xviddec->fps);
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ret = gst_pad_try_set_caps(xviddec->srcpad, new);
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if (ret != GST_PAD_LINK_REFUSED)
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return ret;
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}
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return GST_PAD_LINK_REFUSED;
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}
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return GST_PAD_LINK_OK;
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}
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static GstElementStateReturn
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gst_xviddec_change_state (GstElement *element)
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{
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GstXvidDec *xviddec = GST_XVIDDEC (element);
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switch (GST_STATE_PENDING (element)) {
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case GST_STATE_PAUSED_TO_READY:
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if (xviddec->handle) {
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gst_xviddec_unset (xviddec);
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}
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break;
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default:
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break;
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}
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if (parent_class->change_state)
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return parent_class->change_state (element);
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return GST_STATE_SUCCESS;
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}
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