--- a/gst_plugins_good/ext/libpng/gstpngenc.c	Tue Jul 06 14:35:10 2010 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,394 +0,0 @@
-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- *
- * Filter:
- * Copyright (C) 2000 Donald A. Graft
- *
- * 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-pngenc
- *
- * Encodes png images.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-#include <string.h>
-#include <gst/gst.h>
-#include "gstpngenc.h"
-#include <gst/video/video.h>
-#include <zlib.h>
-
-#define MAX_HEIGHT              4096
-
-
-static const GstElementDetails gst_pngenc_details =
-GST_ELEMENT_DETAILS ("PNG image encoder",
-    "Codec/Encoder/Image",
-    "Encode a video frame to a .png image",
-    "Jeremy SIMON <jsimon13@yahoo.fr>");
-
-GST_DEBUG_CATEGORY_STATIC (pngenc_debug);
-#define GST_CAT_DEFAULT pngenc_debug
-
-/* Filter signals and args */
-enum
-{
-  /* FILL ME */
-  LAST_SIGNAL
-};
-
-#define DEFAULT_SNAPSHOT                TRUE
-/* #define DEFAULT_NEWMEDIA             FALSE */
-#define DEFAULT_COMPRESSION_LEVEL       6
-
-enum
-{
-  ARG_0,
-  ARG_SNAPSHOT,
-/*   ARG_NEWMEDIA, */
-  ARG_COMPRESSION_LEVEL
-};
-
-static GstStaticPadTemplate pngenc_src_template =
-GST_STATIC_PAD_TEMPLATE ("src",
-    GST_PAD_SRC,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS ("image/png, "
-        "width = (int) [ 16, 4096 ], "
-        "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0.0, MAX ]")
-    );
-
-static GstStaticPadTemplate pngenc_sink_template =
-    GST_STATIC_PAD_TEMPLATE ("sink",
-    GST_PAD_SINK,
-    GST_PAD_ALWAYS,
-    GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_RGB)
-    );
-
-/* static GstElementClass *parent_class = NULL; */
-
-GST_BOILERPLATE (GstPngEnc, gst_pngenc, GstElement, GST_TYPE_ELEMENT);
-
-static void gst_pngenc_set_property (GObject * object,
-    guint prop_id, const GValue * value, GParamSpec * pspec);
-static void gst_pngenc_get_property (GObject * object,
-    guint prop_id, GValue * value, GParamSpec * pspec);
-
-static GstFlowReturn gst_pngenc_chain (GstPad * pad, GstBuffer * data);
-
-static void
-user_error_fn (png_structp png_ptr, png_const_charp error_msg)
-{
-  g_warning ("%s", error_msg);
-}
-
-static void
-user_warning_fn (png_structp png_ptr, png_const_charp warning_msg)
-{
-  g_warning ("%s", warning_msg);
-}
-
-static void
-gst_pngenc_base_init (gpointer g_class)
-{
-  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
-  gst_element_class_add_pad_template
-      (element_class, gst_static_pad_template_get (&pngenc_sink_template));
-  gst_element_class_add_pad_template
-      (element_class, gst_static_pad_template_get (&pngenc_src_template));
-  gst_element_class_set_details (element_class, &gst_pngenc_details);
-}
-
-static void
-gst_pngenc_class_init (GstPngEncClass * klass)
-{
-  GObjectClass *gobject_class;
-
-  gobject_class = (GObjectClass *) klass;
-
-  parent_class = g_type_class_peek_parent (klass);
-
-  gobject_class->get_property = gst_pngenc_get_property;
-  gobject_class->set_property = gst_pngenc_set_property;
-
-  g_object_class_install_property (gobject_class, ARG_SNAPSHOT,
-      g_param_spec_boolean ("snapshot", "Snapshot",
-          "Send EOS after encoding a frame, useful for snapshots",
-          DEFAULT_SNAPSHOT, (GParamFlags) G_PARAM_READWRITE));
-
-/*   g_object_class_install_property (gobject_class, ARG_NEWMEDIA, */
-/*       g_param_spec_boolean ("newmedia", "newmedia", */
-/*           "Send new media discontinuity after encoding each frame", */
-/*           DEFAULT_NEWMEDIA, (GParamFlags) G_PARAM_READWRITE)); */
-
-  g_object_class_install_property
-      (gobject_class, ARG_COMPRESSION_LEVEL,
-      g_param_spec_uint ("compression-level", "compression-level",
-          "PNG compression level",
-          Z_NO_COMPRESSION, Z_BEST_COMPRESSION,
-          DEFAULT_COMPRESSION_LEVEL, (GParamFlags) G_PARAM_READWRITE));
-
-  GST_DEBUG_CATEGORY_INIT (pngenc_debug, "pngenc", 0, "PNG image encoder");
-}
-
-
-static gboolean
-gst_pngenc_setcaps (GstPad * pad, GstCaps * caps)
-{
-  GstPngEnc *pngenc;
-  const GValue *fps;
-  GstStructure *structure;
-  GstCaps *pcaps;
-  gboolean ret = TRUE;
-
-  pngenc = GST_PNGENC (gst_pad_get_parent (pad));
-
-  structure = gst_caps_get_structure (caps, 0);
-  gst_structure_get_int (structure, "width", &pngenc->width);
-  gst_structure_get_int (structure, "height", &pngenc->height);
-  fps = gst_structure_get_value (structure, "framerate");
-  gst_structure_get_int (structure, "bpp", &pngenc->bpp);
-
-  if (pngenc->bpp == 32)
-    pngenc->stride = pngenc->width * 4;
-  else
-    pngenc->stride = GST_ROUND_UP_4 (pngenc->width * 3);
-
-  pcaps = gst_caps_new_simple ("image/png",
-      "width", G_TYPE_INT, pngenc->width,
-      "height", G_TYPE_INT, pngenc->height, NULL);
-  structure = gst_caps_get_structure (pcaps, 0);
-  gst_structure_set_value (structure, "framerate", fps);
-
-  ret = gst_pad_set_caps (pngenc->srcpad, pcaps);
-
-  gst_caps_unref (pcaps);
-  gst_object_unref (pngenc);
-
-  return ret;
-}
-
-static void
-gst_pngenc_init (GstPngEnc * pngenc, GstPngEncClass * g_class)
-{
-  /* sinkpad */
-  pngenc->sinkpad = gst_pad_new_from_static_template
-      (&pngenc_sink_template, "sink");
-  gst_pad_set_chain_function (pngenc->sinkpad, gst_pngenc_chain);
-  /*   gst_pad_set_link_function (pngenc->sinkpad, gst_pngenc_sinklink); */
-  /*   gst_pad_set_getcaps_function (pngenc->sinkpad, gst_pngenc_sink_getcaps); */
-  gst_pad_set_setcaps_function (pngenc->sinkpad, gst_pngenc_setcaps);
-  gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->sinkpad);
-
-  /* srcpad */
-  pngenc->srcpad = gst_pad_new_from_static_template
-      (&pngenc_src_template, "src");
-  /*   pngenc->srcpad = gst_pad_new ("src", GST_PAD_SRC); */
-  /*   gst_pad_set_getcaps_function (pngenc->srcpad, gst_pngenc_src_getcaps); */
-  /*   gst_pad_set_setcaps_function (pngenc->srcpad, gst_pngenc_setcaps); */
-  gst_element_add_pad (GST_ELEMENT (pngenc), pngenc->srcpad);
-
-  /* init settings */
-  pngenc->png_struct_ptr = NULL;
-  pngenc->png_info_ptr = NULL;
-
-  pngenc->snapshot = DEFAULT_SNAPSHOT;
-/*   pngenc->newmedia = FALSE; */
-  pngenc->compression_level = DEFAULT_COMPRESSION_LEVEL;
-}
-
-static void
-user_flush_data (png_structp png_ptr G_GNUC_UNUSED)
-{
-}
-
-static void
-user_write_data (png_structp png_ptr, png_bytep data, png_uint_32 length)
-{
-  GstPngEnc *pngenc;
-
-  pngenc = (GstPngEnc *) png_get_io_ptr (png_ptr);
-
-  if (pngenc->written + length >= GST_BUFFER_SIZE (pngenc->buffer_out)) {
-    GST_ERROR_OBJECT (pngenc, "output buffer bigger than the input buffer!?");
-    /* yuck */
-    longjmp (pngenc->png_struct_ptr->jmpbuf, 1);
-
-    /* never reached */
-    return;
-  }
-
-  memcpy (GST_BUFFER_DATA (pngenc->buffer_out) + pngenc->written, data, length);
-  pngenc->written += length;
-}
-
-static GstFlowReturn
-gst_pngenc_chain (GstPad * pad, GstBuffer * buf)
-{
-  GstPngEnc *pngenc;
-  gint row_index;
-  png_byte *row_pointers[MAX_HEIGHT];
-  GstFlowReturn ret = GST_FLOW_OK;
-  GstBuffer *encoded_buf = NULL;
-
-  pngenc = GST_PNGENC (gst_pad_get_parent (pad));
-
-  GST_DEBUG_OBJECT (pngenc, "BEGINNING");
-
-  /* initialize png struct stuff */
-  pngenc->png_struct_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING,
-      (png_voidp) NULL, user_error_fn, user_warning_fn);
-  if (pngenc->png_struct_ptr == NULL) {
-    gst_buffer_unref (buf);
-    GST_ELEMENT_ERROR (pngenc, LIBRARY, INIT, (NULL),
-        ("Failed to initialize png structure"));
-    ret = GST_FLOW_ERROR;
-    goto done;
-  }
-
-  pngenc->png_info_ptr = png_create_info_struct (pngenc->png_struct_ptr);
-  if (!pngenc->png_info_ptr) {
-    gst_buffer_unref (buf);
-    png_destroy_write_struct (&(pngenc->png_struct_ptr), (png_infopp) NULL);
-    GST_ELEMENT_ERROR (pngenc, LIBRARY, INIT, (NULL),
-        ("Failed to initialize the png info structure"));
-    ret = GST_FLOW_ERROR;
-    goto done;
-  }
-
-  /* non-0 return is from a longjmp inside of libpng */
-  if (setjmp (pngenc->png_struct_ptr->jmpbuf) != 0) {
-    gst_buffer_unref (buf);
-    png_destroy_write_struct (&pngenc->png_struct_ptr, &pngenc->png_info_ptr);
-    GST_ELEMENT_ERROR (pngenc, LIBRARY, FAILED, (NULL),
-        ("returning from longjmp"));
-    ret = GST_FLOW_ERROR;
-    goto done;
-  }
-
-  png_set_filter (pngenc->png_struct_ptr, 0,
-      PNG_FILTER_NONE | PNG_FILTER_VALUE_NONE);
-  png_set_compression_level (pngenc->png_struct_ptr, pngenc->compression_level);
-
-  png_set_IHDR (pngenc->png_struct_ptr,
-      pngenc->png_info_ptr,
-      pngenc->width,
-      pngenc->height,
-      8,
-      (pngenc->bpp == 32) ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
-      PNG_INTERLACE_NONE,
-      PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
-
-  png_set_write_fn (pngenc->png_struct_ptr, pngenc,
-      (png_rw_ptr) user_write_data, user_flush_data);
-
-  for (row_index = 0; row_index < pngenc->height; row_index++) {
-    row_pointers[row_index] = GST_BUFFER_DATA (buf) +
-        (row_index * pngenc->stride);
-  }
-
-  /* allocate the output buffer */
-  pngenc->buffer_out =
-      gst_buffer_new_and_alloc (pngenc->height * pngenc->stride);
-  pngenc->written = 0;
-
-  png_write_info (pngenc->png_struct_ptr, pngenc->png_info_ptr);
-  png_write_image (pngenc->png_struct_ptr, row_pointers);
-  png_write_end (pngenc->png_struct_ptr, NULL);
-
-  encoded_buf = gst_buffer_create_sub (pngenc->buffer_out, 0, pngenc->written);
-
-  png_destroy_info_struct (pngenc->png_struct_ptr, &pngenc->png_info_ptr);
-  png_destroy_write_struct (&pngenc->png_struct_ptr, (png_infopp) NULL);
-  gst_buffer_copy_metadata (encoded_buf, buf, GST_BUFFER_COPY_TIMESTAMPS);
-  gst_buffer_unref (buf);
-  gst_buffer_set_caps (encoded_buf, GST_PAD_CAPS (pngenc->srcpad));
-
-  if ((ret = gst_pad_push (pngenc->srcpad, encoded_buf)) != GST_FLOW_OK)
-    goto done;
-
-  if (pngenc->snapshot) {
-    GstEvent *event;
-
-    GST_DEBUG_OBJECT (pngenc, "snapshot mode, sending EOS");
-    /* send EOS event, since a frame has been pushed out */
-    event = gst_event_new_eos ();
-
-    gst_pad_push_event (pngenc->srcpad, event);
-    ret = GST_FLOW_UNEXPECTED;
-  }
-
-done:
-  GST_DEBUG_OBJECT (pngenc, "END, ret:%d", ret);
-
-  if (pngenc->buffer_out != NULL) {
-    gst_buffer_unref (pngenc->buffer_out);
-    pngenc->buffer_out = NULL;
-  }
-
-  gst_object_unref (pngenc);
-  return ret;
-}
-
-
-static void
-gst_pngenc_get_property (GObject * object,
-    guint prop_id, GValue * value, GParamSpec * pspec)
-{
-  GstPngEnc *pngenc;
-
-  pngenc = GST_PNGENC (object);
-
-  switch (prop_id) {
-    case ARG_SNAPSHOT:
-      g_value_set_boolean (value, pngenc->snapshot);
-      break;
-/*     case ARG_NEWMEDIA: */
-/*       g_value_set_boolean (value, pngenc->newmedia); */
-/*       break; */
-    case ARG_COMPRESSION_LEVEL:
-      g_value_set_uint (value, pngenc->compression_level);
-      break;
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-  }
-}
-
-
-static void
-gst_pngenc_set_property (GObject * object,
-    guint prop_id, const GValue * value, GParamSpec * pspec)
-{
-  GstPngEnc *pngenc;
-
-  pngenc = GST_PNGENC (object);
-
-  switch (prop_id) {
-    case ARG_SNAPSHOT:
-      pngenc->snapshot = g_value_get_boolean (value);
-      break;
-/*     case ARG_NEWMEDIA: */
-/*       pngenc->newmedia = g_value_get_boolean (value); */
-/*       break; */
-    case ARG_COMPRESSION_LEVEL:
-      pngenc->compression_level = g_value_get_uint (value);
-      break;
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-  }
-}