--- a/gst_plugins_good/ext/libpng/gstpngenc.c Fri Jul 09 16:26:45 2010 -0500
+++ /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;
- }
-}