--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/ffmpegcolorspace/gstffmpegcolorspace.c	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,510 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * This file:
+ * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-ffmpegcolorspace
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch -v videotestsrc ! video/x-raw-yuv,format=\(fourcc\)YUY2 ! ffmpegcolorspace ! ximagesink
+ * </programlisting>
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "gstffmpegcolorspace.h"
+#include "gstffmpegcodecmap.h"
+
+GST_DEBUG_CATEGORY_STATIC (ffmpegcolorspace_debug);
+#define GST_CAT_DEFAULT ffmpegcolorspace_debug
+
+/* elementfactory information */
+static const GstElementDetails ffmpegcsp_details =
+GST_ELEMENT_DETAILS ("FFMPEG Colorspace converter",
+    "Filter/Converter/Video",
+    "Converts video from one colorspace to another",
+    "Ronald Bultje <rbultje@ronald.bitfreak.net>");
+
+
+/* Stereo signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+};
+
+static GType gst_ffmpegcsp_get_type (void);
+
+static void gst_ffmpegcsp_base_init (GstFFMpegCspClass * klass);
+static void gst_ffmpegcsp_class_init (GstFFMpegCspClass * klass);
+static void gst_ffmpegcsp_init (GstFFMpegCsp * space);
+
+static gboolean gst_ffmpegcsp_set_caps (GstBaseTransform * btrans,
+    GstCaps * incaps, GstCaps * outcaps);
+static gboolean gst_ffmpegcsp_get_unit_size (GstBaseTransform * btrans,
+    GstCaps * caps, guint * size);
+static GstFlowReturn gst_ffmpegcsp_transform (GstBaseTransform * btrans,
+    GstBuffer * inbuf, GstBuffer * outbuf);
+#if 0
+static GstFlowReturn gst_ffmpegcsp_transform_ip (GstBaseTransform * btrans,
+    GstBuffer * inbuf);
+#endif
+
+static GstPadTemplate *sinktempl, *srctempl;
+static GstElementClass *parent_class = NULL;
+
+/*static guint gst_ffmpegcsp_signals[LAST_SIGNAL] = { 0 }; */
+
+/* copies the given caps */
+static GstCaps *
+gst_ffmpegcsp_caps_remove_format_info (GstCaps * caps)
+{
+  int i;
+  GstStructure *structure;
+  GstCaps *rgbcaps;
+  GstCaps *graycaps;
+
+  caps = gst_caps_copy (caps);
+
+  for (i = 0; i < gst_caps_get_size (caps); i++) {
+    structure = gst_caps_get_structure (caps, i);
+
+    gst_structure_set_name (structure, "video/x-raw-yuv");
+    gst_structure_remove_field (structure, "format");
+    gst_structure_remove_field (structure, "endianness");
+    gst_structure_remove_field (structure, "depth");
+    gst_structure_remove_field (structure, "bpp");
+    gst_structure_remove_field (structure, "red_mask");
+    gst_structure_remove_field (structure, "green_mask");
+    gst_structure_remove_field (structure, "blue_mask");
+    gst_structure_remove_field (structure, "alpha_mask");
+    gst_structure_remove_field (structure, "palette_data");
+  }
+
+  gst_caps_do_simplify (caps);
+  rgbcaps = gst_caps_copy (caps);
+
+  for (i = 0; i < gst_caps_get_size (rgbcaps); i++) {
+    structure = gst_caps_get_structure (rgbcaps, i);
+
+    gst_structure_set_name (structure, "video/x-raw-rgb");
+  }
+  graycaps = gst_caps_copy (caps);
+
+  for (i = 0; i < gst_caps_get_size (graycaps); i++) {
+    structure = gst_caps_get_structure (graycaps, i);
+
+    gst_structure_set_name (structure, "video/x-raw-gray");
+  }
+
+  gst_caps_append (caps, graycaps);
+  gst_caps_append (caps, rgbcaps);
+
+  return caps;
+}
+
+/* The caps can be transformed into any other caps with format info removed.
+ * However, we should prefer passthrough, so if passthrough is possible,
+ * put it first in the list. */
+static GstCaps *
+gst_ffmpegcsp_transform_caps (GstBaseTransform * btrans,
+    GstPadDirection direction, GstCaps * caps)
+{
+  GstFFMpegCsp *space;
+  GstCaps *template;
+  GstCaps *result;
+
+  space = GST_FFMPEGCSP (btrans);
+
+  template = gst_ffmpegcsp_codectype_to_caps (CODEC_TYPE_VIDEO, NULL);
+  result = gst_caps_intersect (caps, template);
+  gst_caps_unref (template);
+
+  gst_caps_append (result, gst_ffmpegcsp_caps_remove_format_info (caps));
+
+  GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"
+      GST_PTR_FORMAT, caps, result);
+
+  return result;
+}
+
+static gboolean
+gst_ffmpegcsp_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
+    GstCaps * outcaps)
+{
+  GstFFMpegCsp *space;
+  GstStructure *structure;
+  gint in_height, in_width;
+  gint out_height, out_width;
+  const GValue *in_framerate = NULL;
+  const GValue *out_framerate = NULL;
+  const GValue *in_par = NULL;
+  const GValue *out_par = NULL;
+  AVCodecContext *ctx;
+  gboolean res;
+
+  space = GST_FFMPEGCSP (btrans);
+
+  /* parse in and output values */
+  structure = gst_caps_get_structure (incaps, 0);
+
+  /* we have to have width and height */
+  res = gst_structure_get_int (structure, "width", &in_width);
+  res &= gst_structure_get_int (structure, "height", &in_height);
+  if (!res)
+    goto no_width_height;
+
+  /* and framerate */
+  in_framerate = gst_structure_get_value (structure, "framerate");
+  if (in_framerate == NULL || !GST_VALUE_HOLDS_FRACTION (in_framerate))
+    goto no_framerate;
+
+  /* this is optional */
+  in_par = gst_structure_get_value (structure, "pixel-aspect-ratio");
+
+  structure = gst_caps_get_structure (outcaps, 0);
+
+  /* we have to have width and height */
+  res = gst_structure_get_int (structure, "width", &out_width);
+  res &= gst_structure_get_int (structure, "height", &out_height);
+  if (!res)
+    goto no_width_height;
+
+  /* and framerate */
+  out_framerate = gst_structure_get_value (structure, "framerate");
+  if (out_framerate == NULL || !GST_VALUE_HOLDS_FRACTION (out_framerate))
+    goto no_framerate;
+
+  /* this is optional */
+  out_par = gst_structure_get_value (structure, "pixel-aspect-ratio");
+
+  /* these must match */
+  if (in_width != out_width || in_height != out_height ||
+      gst_value_compare (in_framerate, out_framerate) != GST_VALUE_EQUAL)
+    goto format_mismatch;
+
+  /* if present, these must match too */
+  if (in_par && out_par
+      && gst_value_compare (in_par, out_par) != GST_VALUE_EQUAL)
+    goto format_mismatch;
+
+  ctx = avcodec_alloc_context ();
+
+  space->width = ctx->width = in_width;
+  space->height = ctx->height = in_height;
+
+  /* get from format */
+  ctx->pix_fmt = PIX_FMT_NB;
+  gst_ffmpegcsp_caps_with_codectype (CODEC_TYPE_VIDEO, incaps, ctx);
+  if (ctx->pix_fmt == PIX_FMT_NB)
+    goto invalid_in_caps;
+  space->from_pixfmt = ctx->pix_fmt;
+
+  /* palette, only for from data */
+  if (space->palette)
+    av_free (space->palette);
+  space->palette = ctx->palctrl;
+  ctx->palctrl = NULL;
+
+  /* get to format */
+  ctx->pix_fmt = PIX_FMT_NB;
+  gst_ffmpegcsp_caps_with_codectype (CODEC_TYPE_VIDEO, outcaps, ctx);
+  if (ctx->pix_fmt == PIX_FMT_NB)
+    goto invalid_out_caps;
+  space->to_pixfmt = ctx->pix_fmt;
+
+  GST_DEBUG ("reconfigured %d %d", space->from_pixfmt, space->to_pixfmt);
+
+  av_free (ctx);
+
+  return TRUE;
+
+  /* ERRORS */
+no_width_height:
+  {
+    GST_DEBUG_OBJECT (space, "did not specify width or height");
+    space->from_pixfmt = PIX_FMT_NB;
+    space->to_pixfmt = PIX_FMT_NB;
+    return FALSE;
+  }
+no_framerate:
+  {
+    GST_DEBUG_OBJECT (space, "did not specify framerate");
+    space->from_pixfmt = PIX_FMT_NB;
+    space->to_pixfmt = PIX_FMT_NB;
+    return FALSE;
+  }
+format_mismatch:
+  {
+    GST_DEBUG_OBJECT (space, "input and output formats do not match");
+    space->from_pixfmt = PIX_FMT_NB;
+    space->to_pixfmt = PIX_FMT_NB;
+    return FALSE;
+  }
+invalid_in_caps:
+  {
+    GST_DEBUG_OBJECT (space, "could not configure context for input format");
+    av_free (ctx);
+    space->from_pixfmt = PIX_FMT_NB;
+    space->to_pixfmt = PIX_FMT_NB;
+    return FALSE;
+  }
+invalid_out_caps:
+  {
+    GST_DEBUG_OBJECT (space, "could not configure context for output format");
+    av_free (ctx);
+    space->from_pixfmt = PIX_FMT_NB;
+    space->to_pixfmt = PIX_FMT_NB;
+    return FALSE;
+  }
+}
+
+static GType
+gst_ffmpegcsp_get_type (void)
+{
+  static GType ffmpegcsp_type = 0;
+
+  if (!ffmpegcsp_type) {
+    static const GTypeInfo ffmpegcsp_info = {
+      sizeof (GstFFMpegCspClass),
+      (GBaseInitFunc) gst_ffmpegcsp_base_init,
+      NULL,
+      (GClassInitFunc) gst_ffmpegcsp_class_init,
+      NULL,
+      NULL,
+      sizeof (GstFFMpegCsp),
+      0,
+      (GInstanceInitFunc) gst_ffmpegcsp_init,
+    };
+
+    ffmpegcsp_type = g_type_register_static (GST_TYPE_BASE_TRANSFORM,
+        "GstFFMpegCsp", &ffmpegcsp_info, 0);
+  }
+
+  return ffmpegcsp_type;
+}
+
+static void
+gst_ffmpegcsp_base_init (GstFFMpegCspClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class, srctempl);
+  gst_element_class_add_pad_template (element_class, sinktempl);
+  gst_element_class_set_details (element_class, &ffmpegcsp_details);
+}
+
+static void
+gst_ffmpegcsp_finalize (GObject * obj)
+{
+  GstFFMpegCsp *space = GST_FFMPEGCSP (obj);
+
+  if (space->palette)
+    av_free (space->palette);
+
+  G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+static void
+gst_ffmpegcsp_class_init (GstFFMpegCspClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseTransformClass *gstbasetransform_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasetransform_class = (GstBaseTransformClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_ffmpegcsp_finalize);
+
+  gstbasetransform_class->transform_caps =
+      GST_DEBUG_FUNCPTR (gst_ffmpegcsp_transform_caps);
+  gstbasetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_ffmpegcsp_set_caps);
+  gstbasetransform_class->get_unit_size =
+      GST_DEBUG_FUNCPTR (gst_ffmpegcsp_get_unit_size);
+  gstbasetransform_class->transform =
+      GST_DEBUG_FUNCPTR (gst_ffmpegcsp_transform);
+#if 0
+  gstbasetransform_class->transform_ip =
+      GST_DEBUG_FUNCPTR (gst_ffmpegcsp_transform_ip);
+#endif
+
+  gstbasetransform_class->passthrough_on_same_caps = TRUE;
+
+  GST_DEBUG_CATEGORY_INIT (ffmpegcolorspace_debug, "ffmpegcolorspace", 0,
+      "FFMPEG-based colorspace converter");
+}
+
+static void
+gst_ffmpegcsp_init (GstFFMpegCsp * space)
+{
+  gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (space), TRUE);
+  space->from_pixfmt = space->to_pixfmt = PIX_FMT_NB;
+  space->palette = NULL;
+}
+
+static gboolean
+gst_ffmpegcsp_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
+    guint * size)
+{
+  GstFFMpegCsp *space = NULL;
+  GstStructure *structure = NULL;
+  AVCodecContext *ctx = NULL;
+  gboolean ret = TRUE;
+  gint width, height;
+
+  g_assert (size);
+
+  space = GST_FFMPEGCSP (btrans);
+
+  structure = gst_caps_get_structure (caps, 0);
+  gst_structure_get_int (structure, "width", &width);
+  gst_structure_get_int (structure, "height", &height);
+
+  ctx = avcodec_alloc_context ();
+
+  g_assert (ctx != NULL);
+
+  ctx->pix_fmt = PIX_FMT_NB;
+
+  gst_ffmpegcsp_caps_with_codectype (CODEC_TYPE_VIDEO, caps, ctx);
+
+  if (G_UNLIKELY (ctx->pix_fmt == PIX_FMT_NB)) {
+    ret = FALSE;
+    goto beach;
+  }
+
+  *size = avpicture_get_size (ctx->pix_fmt, width, height);
+
+  /* ffmpeg frames have the palette after the frame data, whereas
+   * GStreamer currently puts it into the caps as 'palette_data' field,
+   * so for paletted data the frame size avpicture_get_size() returns is
+   * 1024 bytes larger than what GStreamer expects. */
+  if (gst_structure_has_field (structure, "palette_data")) {
+    *size -= 4 * 256;           /* = AVPALETTE_SIZE */
+  }
+
+beach:
+
+  if (ctx->palctrl)
+    av_free (ctx->palctrl);
+  av_free (ctx);
+
+  return ret;
+}
+
+#if 0
+/* FIXME: Could use transform_ip to implement endianness swap type operations */
+static GstFlowReturn
+gst_ffmpegcsp_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
+{
+  /* do nothing */
+  return GST_FLOW_OK;
+}
+#endif
+
+static GstFlowReturn
+gst_ffmpegcsp_transform (GstBaseTransform * btrans, GstBuffer * inbuf,
+    GstBuffer * outbuf)
+{
+  GstFFMpegCsp *space;
+  gint result;
+
+  space = GST_FFMPEGCSP (btrans);
+
+  GST_DEBUG ("from %d -> to %d", space->from_pixfmt, space->to_pixfmt);
+  if (space->from_pixfmt == PIX_FMT_NB || space->to_pixfmt == PIX_FMT_NB)
+    goto unknown_format;
+
+  /* fill from with source data */
+  gst_ffmpegcsp_avpicture_fill (&space->from_frame,
+      GST_BUFFER_DATA (inbuf), space->from_pixfmt, space->width, space->height);
+
+  /* fill optional palette */
+  if (space->palette)
+    space->from_frame.data[1] = (uint8_t *) space->palette->palette;
+
+  /* fill target frame */
+  gst_ffmpegcsp_avpicture_fill (&space->to_frame,
+      GST_BUFFER_DATA (outbuf), space->to_pixfmt, space->width, space->height);
+
+  /* and convert */
+  result = img_convert (&space->to_frame, space->to_pixfmt,
+      &space->from_frame, space->from_pixfmt, space->width, space->height);
+  if (result == -1)
+    goto not_supported;
+
+  /* baseclass copies timestamps */
+  GST_DEBUG ("from %d -> to %d done", space->from_pixfmt, space->to_pixfmt);
+
+  return GST_FLOW_OK;
+
+  /* ERRORS */
+unknown_format:
+  {
+    GST_ELEMENT_ERROR (space, CORE, NOT_IMPLEMENTED, (NULL),
+        ("attempting to convert colorspaces between unknown formats"));
+    return GST_FLOW_NOT_NEGOTIATED;
+  }
+not_supported:
+  {
+    GST_ELEMENT_ERROR (space, CORE, NOT_IMPLEMENTED, (NULL),
+        ("cannot convert between formats"));
+    return GST_FLOW_NOT_SUPPORTED;
+  }
+}
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+
+
+gboolean
+gst_ffmpegcolorspace_register (GstPlugin * plugin)
+{
+  GstCaps *caps;
+
+  /* template caps */
+  caps = gst_ffmpegcsp_codectype_to_caps (CODEC_TYPE_VIDEO, NULL);
+
+  /* build templates */
+  srctempl = gst_pad_template_new ("src",
+      GST_PAD_SRC, GST_PAD_ALWAYS, gst_caps_copy (caps));
+
+  /* the sink template will do palette handling as well... */
+  sinktempl = gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
+
+  return gst_element_register (plugin, "ffmpegcolorspace",
+      GST_RANK_NONE, GST_TYPE_FFMPEGCSP);
+}