--- /dev/null
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * This file:
+ * Copyright (C) 2005 Luca Ognibene <luogni@tin.it>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#ifdef HAVE_FFMPEG_UNINSTALLED
+#include <avcodec.h>
+#else
+#include <ffmpeg/avcodec.h>
+#endif
+
+#include <gst/video/video.h>
+#include "gstffmpeg.h"
+#include "gstffmpegcodecmap.h"
+
+#define GST_TYPE_FFMPEGSCALE \
+ (gst_ffmpegscale_get_type())
+#define GST_FFMPEGSCALE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFMPEGSCALE,GstFFMpegScale))
+#define GST_FFMPEGSCALE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFMPEGSCALE,GstFFMpegScale))
+#define GST_IS_FFMPEGSCALE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FFMPEGSCALE))
+#define GST_IS_FFMPEGSCALE_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FFMPEGSCALE))
+
+typedef struct _GstFFMpegScale GstFFMpegScale;
+typedef struct _GstFFMpegScaleClass GstFFMpegScaleClass;
+
+struct _GstFFMpegScale
+{
+ GstElement element;
+
+ GstPad *sinkpad, *srcpad;
+
+ gint from_width, from_height;
+ gint to_width, to_height;
+
+ enum PixelFormat pixfmt;
+ AVPicture from_frame, to_frame;
+ GstCaps *sinkcaps;
+
+ guint to_size;
+
+ ImgReSampleContext *res;
+
+ gboolean passthru;
+};
+
+struct _GstFFMpegScaleClass
+{
+ GstElementClass parent_class;
+};
+
+/* elementfactory information */
+static GstElementDetails ffmpegscale_details = {
+ "FFMPEG Scale element",
+ "Filter/Converter/Video",
+ "Converts video from one resolution to another",
+ "Luca Ognibene <luogni@tin.it>",
+};
+
+/* Signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0,
+};
+
+static GstStaticPadTemplate gst_ffmpegscale_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
+ );
+
+static GstStaticPadTemplate gst_ffmpegscale_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
+ );
+
+
+static GType gst_ffmpegscale_get_type (void);
+
+static void gst_ffmpegscale_base_init (GstFFMpegScaleClass * klass);
+static void gst_ffmpegscale_class_init (GstFFMpegScaleClass * klass);
+static void gst_ffmpegscale_init (GstFFMpegScale * space);
+
+static void gst_ffmpegscale_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_ffmpegscale_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+static GstPadLinkReturn
+gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps);
+
+static void gst_ffmpegscale_chain (GstPad * pad, GstData * data);
+static GstElementStateReturn gst_ffmpegscale_change_state (GstElement * element);
+
+static GstElementClass *parent_class = NULL;
+
+/*static guint gst_ffmpegscale_signals[LAST_SIGNAL] = { 0 }; */
+
+static GstCaps *
+gst_ffmpegscale_getcaps (GstPad * pad)
+{
+ GstFFMpegScale *filter;
+ GstCaps *othercaps;
+ GstCaps *caps;
+ GstPad *otherpad;
+ gint i;
+
+ filter = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
+
+ otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
+
+ othercaps = gst_pad_get_allowed_caps (otherpad);
+
+ caps = gst_caps_intersect (othercaps, gst_pad_get_pad_template_caps (pad));
+ gst_caps_free (othercaps);
+
+ for (i = 0; i < gst_caps_get_size (caps); i++) {
+ GstStructure *structure = gst_caps_get_structure (caps, i);
+
+ gst_structure_set (structure,
+ "width", GST_TYPE_INT_RANGE, 16, 4096,
+ "height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
+ gst_structure_remove_field (structure, "pixel-aspect-ratio");
+ }
+
+ GST_DEBUG ("getcaps are: %" GST_PTR_FORMAT, caps);
+
+ return caps;
+}
+
+static GstPadLinkReturn
+gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps)
+{
+ GstStructure *structure;
+ AVCodecContext *ctx;
+ GstFFMpegScale *scale;
+ const GstCaps *othercaps;
+ GstPad *otherpad;
+ GstPadLinkReturn ret;
+ int height, width;
+ double framerate;
+ const GValue *par = NULL;
+ gchar *caps_string;
+
+ caps_string = gst_caps_to_string (caps);
+ GST_DEBUG ("ffmpegscale _link %s\n", caps_string);
+ g_free (caps_string);
+
+ scale = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
+
+ otherpad = (pad == scale->srcpad) ? scale->sinkpad :
+ scale->srcpad;
+
+ structure = gst_caps_get_structure (caps, 0);
+ ret = gst_structure_get_int (structure, "width", &width);
+ ret &= gst_structure_get_int (structure, "height", &height);
+
+ ctx = avcodec_alloc_context ();
+ ctx->width = width;
+ ctx->height = height;
+ ctx->pix_fmt = PIX_FMT_NB;
+ gst_ffmpeg_caps_with_codectype (CODEC_TYPE_VIDEO, caps, ctx);
+ if (ctx->pix_fmt == PIX_FMT_NB) {
+ av_free (ctx);
+
+ /* we disable ourself here */
+ return GST_PAD_LINK_REFUSED;
+ }
+
+ scale->pixfmt = ctx->pix_fmt;
+ av_free (ctx);
+
+ ret = gst_pad_try_set_caps (otherpad, caps);
+ if (ret == GST_PAD_LINK_OK) {
+ /* cool, we can use passthru */
+
+ scale->to_width = width;
+ scale->to_height = height;
+ scale->from_width = width;
+ scale->from_height = height;
+
+ scale->passthru = TRUE;
+ GST_FLAG_SET (scale, GST_ELEMENT_WORK_IN_PLACE);
+
+ return GST_PAD_LINK_OK;
+ }
+
+ if (gst_pad_is_negotiated (otherpad)) {
+ GstCaps *newcaps = gst_caps_copy (caps);
+
+ if (pad == scale->srcpad) {
+ gst_caps_set_simple (newcaps,
+ "width", G_TYPE_INT, scale->from_width,
+ "height", G_TYPE_INT, scale->from_height, NULL);
+ } else {
+ gst_caps_set_simple (newcaps,
+ "width", G_TYPE_INT, scale->to_width,
+ "height", G_TYPE_INT, scale->to_height, NULL);
+ }
+ ret = gst_pad_try_set_caps (otherpad, newcaps);
+ gst_caps_free (newcaps);
+
+ if (GST_PAD_LINK_FAILED (ret)) {
+ return GST_PAD_LINK_REFUSED;
+ }
+ }
+
+ scale->passthru = FALSE;
+ GST_FLAG_UNSET (scale, GST_ELEMENT_WORK_IN_PLACE);
+
+ if (pad == scale->srcpad) {
+ scale->to_width = width;
+ scale->to_height = height;
+
+ } else {
+ scale->from_width = width;
+ scale->from_height = height;
+ }
+
+ if (gst_pad_is_negotiated (otherpad)) {
+
+ scale->to_size = avpicture_get_size (scale->pixfmt, scale->to_width, scale->to_height);
+
+ if (scale->res != NULL) img_resample_close (scale->res);
+
+ scale->res = img_resample_init (scale->to_width, scale->to_height,
+ scale->from_width, scale->from_height);
+
+ }
+
+ return GST_PAD_LINK_OK;
+}
+
+static GType
+gst_ffmpegscale_get_type (void)
+{
+ static GType ffmpegscale_type = 0;
+
+ if (!ffmpegscale_type) {
+ static const GTypeInfo ffmpegscale_info = {
+ sizeof (GstFFMpegScaleClass),
+ (GBaseInitFunc) gst_ffmpegscale_base_init,
+ NULL,
+ (GClassInitFunc) gst_ffmpegscale_class_init,
+ NULL,
+ NULL,
+ sizeof (GstFFMpegScale),
+ 0,
+ (GInstanceInitFunc) gst_ffmpegscale_init,
+ };
+
+ ffmpegscale_type = g_type_register_static (GST_TYPE_ELEMENT,
+ "GstFFMpegScale", &ffmpegscale_info, 0);
+ }
+
+ return ffmpegscale_type;
+}
+
+static void
+gst_ffmpegscale_base_init (GstFFMpegScaleClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_set_details (element_class, &ffmpegscale_details);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_ffmpegscale_src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_ffmpegscale_sink_template));
+}
+
+static void
+gst_ffmpegscale_class_init (GstFFMpegScaleClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+ gobject_class->set_property = gst_ffmpegscale_set_property;
+ gobject_class->get_property = gst_ffmpegscale_get_property;
+
+ gstelement_class->change_state = gst_ffmpegscale_change_state;
+}
+
+static void
+gst_ffmpegscale_init (GstFFMpegScale * scale)
+{
+ scale->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get
+ (&gst_ffmpegscale_sink_template),
+ "sink");
+ gst_pad_set_link_function (scale->sinkpad, gst_ffmpegscale_pad_link);
+ gst_pad_set_getcaps_function (scale->sinkpad, gst_ffmpegscale_getcaps);
+ gst_pad_set_chain_function (scale->sinkpad, gst_ffmpegscale_chain);
+ gst_element_add_pad (GST_ELEMENT (scale), scale->sinkpad);
+
+ scale->srcpad = gst_pad_new_from_template (gst_static_pad_template_get
+ (&gst_ffmpegscale_src_template),
+ "src");
+ gst_element_add_pad (GST_ELEMENT (scale), scale->srcpad);
+ gst_pad_set_link_function (scale->srcpad, gst_ffmpegscale_pad_link);
+ gst_pad_set_getcaps_function (scale->srcpad, gst_ffmpegscale_getcaps);
+
+ scale->pixfmt = PIX_FMT_NB;
+ scale->passthru = FALSE;
+ scale->res = NULL;
+}
+
+static void
+gst_ffmpegscale_chain (GstPad * pad, GstData * data)
+{
+ GstBuffer *inbuf = GST_BUFFER (data);
+ GstFFMpegScale *scale;
+ GstBuffer *outbuf = NULL;
+
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (inbuf != NULL);
+
+ scale = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
+
+ g_return_if_fail (scale != NULL);
+ g_return_if_fail (GST_IS_FFMPEGSCALE (scale));
+
+ if (!GST_PAD_IS_USABLE (scale->srcpad)) {
+ gst_buffer_unref (inbuf);
+ return;
+ }
+
+ if (scale->passthru == TRUE) {
+ gst_pad_push (scale->srcpad, GST_DATA (inbuf));
+
+ return ;
+ }
+
+ outbuf = gst_pad_alloc_buffer (scale->srcpad, GST_BUFFER_OFFSET_NONE, scale->to_size);
+
+ gst_ffmpeg_avpicture_fill (&scale->from_frame,
+ GST_BUFFER_DATA (inbuf),
+ scale->pixfmt,
+ scale->from_width, scale->from_height);
+
+ gst_ffmpeg_avpicture_fill (&scale->to_frame,
+ GST_BUFFER_DATA (outbuf),
+ scale->pixfmt,
+ scale->to_width, scale->to_height);
+
+ img_resample (scale->res, &scale->to_frame, &scale->from_frame);
+
+ gst_buffer_unref (inbuf);
+ gst_pad_push (scale->srcpad, GST_DATA (outbuf));
+
+}
+
+static GstElementStateReturn
+gst_ffmpegscale_change_state (GstElement * element)
+{
+ GstFFMpegScale *scale;
+
+ scale = GST_FFMPEGSCALE (element);
+
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_READY_TO_NULL:
+ img_resample_close (scale->res);
+ break;
+ }
+
+ if (parent_class->change_state)
+ return parent_class->change_state (element);
+
+ return GST_STATE_SUCCESS;
+}
+
+static void
+gst_ffmpegscale_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstFFMpegScale *scale;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_FFMPEGSCALE (object));
+ scale = GST_FFMPEGSCALE (object);
+
+ switch (prop_id) {
+ default:
+ break;
+ }
+}
+
+static void
+gst_ffmpegscale_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstFFMpegScale *scale;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail (GST_IS_FFMPEGSCALE (object));
+ scale = GST_FFMPEGSCALE (object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+gboolean
+gst_ffmpegscale_register (GstPlugin * plugin)
+{
+
+ return gst_element_register (plugin, "ffvideoscale",
+ GST_RANK_NONE, GST_TYPE_FFMPEGSCALE);
+}
projects / platform / upstream / gst-libav.git / commitdiff