--- a/gst_plugins_good/gst/camerabin/camerabinimage.c Fri Jun 11 16:24:58 2010 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,571 +0,0 @@
-/*
- * GStreamer
- * Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
- *
- * 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:camerabinimage
- * @short_description: image capturing module of #GstCameraBin
- *
- * <refsect2>
- * <para>
- *
- * The pipeline for this module is:
- *
- * <informalexample>
- * <programlisting>
- *-----------------------------------------------------------------------------
- * (src0) -> queue ->
- * -> [post proc] -> tee <
- * (src1) -> imageenc -> metadatamuxer -> filesink
- *-----------------------------------------------------------------------------
- * </programlisting>
- * </informalexample>
- *
- * The property of elements are:
- *
- * queue - "max-size-buffers", 1, "leaky", 2,
- *
- * The image bin opens file for image writing in READY to PAUSED state change.
- * The image bin closes the file in PAUSED to READY state change.
- *
- * </para>
- * </refsect2>
- */
-
-/*
- * includes
- */
-
-#include <gst/gst.h>
-
-#include "camerabinimage.h"
-#include "camerabingeneral.h"
-
-#include "string.h"
-
-/* default internal element names */
-
-#define DEFAULT_SINK "filesink"
-#define DEFAULT_ENC "jpegenc"
-#define DEFAULT_META_MUX "metadatamux"
-
-enum
-{
- PROP_0,
- PROP_FILENAME
-};
-
-static gboolean gst_camerabin_image_create_elements (GstCameraBinImage * img);
-static void gst_camerabin_image_destroy_elements (GstCameraBinImage * img);
-
-static void gst_camerabin_image_dispose (GstCameraBinImage * sink);
-static GstStateChangeReturn
-gst_camerabin_image_change_state (GstElement * element,
- GstStateChange transition);
-static gboolean gst_camerabin_image_send_event (GstElement * element,
- GstEvent * event);
-static void gst_camerabin_image_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec);
-static void gst_camerabin_image_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec);
-
-GST_BOILERPLATE (GstCameraBinImage, gst_camerabin_image, GstBin, GST_TYPE_BIN);
-
-static const GstElementDetails gst_camerabin_image_details =
-GST_ELEMENT_DETAILS ("Image capture bin for camerabin",
- "Bin/Image",
- "Process and store image data",
- "Edgard Lima <edgard.lima@indt.org.br>\n"
- "Nokia Corporation <multimedia@maemo.org>");
-
-static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY);
-
-static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY);
-
-static void
-gst_camerabin_image_base_init (gpointer klass)
-{
- GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
-
- gst_element_class_add_pad_template (eklass,
- gst_static_pad_template_get (&sink_template));
- gst_element_class_add_pad_template (eklass,
- gst_static_pad_template_get (&src_template));
- gst_element_class_set_details (eklass, &gst_camerabin_image_details);
-}
-
-static void
-gst_camerabin_image_class_init (GstCameraBinImageClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
-
- gobject_class = G_OBJECT_CLASS (klass);
- gobject_class->dispose =
- (GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_camerabin_image_dispose);
- eklass->change_state = GST_DEBUG_FUNCPTR (gst_camerabin_image_change_state);
- eklass->send_event = GST_DEBUG_FUNCPTR (gst_camerabin_image_send_event);
-
- gobject_class->set_property =
- GST_DEBUG_FUNCPTR (gst_camerabin_image_set_property);
- gobject_class->get_property =
- GST_DEBUG_FUNCPTR (gst_camerabin_image_get_property);
-
- /**
- * GstCameraBinImage:filename
- *
- * This property can be used to specify the filename of the image.
- *
- **/
- g_object_class_install_property (gobject_class, PROP_FILENAME,
- g_param_spec_string ("filename", "Filename",
- "Filename of the image to save", NULL, G_PARAM_READWRITE));
-}
-
-static void
-gst_camerabin_image_init (GstCameraBinImage * img,
- GstCameraBinImageClass * g_class)
-{
- img->filename = g_string_new ("");
-
- img->pad_tee_enc = NULL;
- img->pad_tee_view = NULL;
-
- img->post = NULL;
- img->tee = NULL;
- img->enc = NULL;
- img->user_enc = NULL;
- img->meta_mux = NULL;
- img->sink = NULL;
- img->queue = NULL;
-
- /* Create src and sink ghost pads */
- img->sinkpad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
- gst_element_add_pad (GST_ELEMENT (img), img->sinkpad);
-
- img->srcpad = gst_ghost_pad_new_no_target ("src", GST_PAD_SRC);
- gst_element_add_pad (GST_ELEMENT (img), img->srcpad);
-
- img->elements_created = FALSE;
-}
-
-static void
-gst_camerabin_image_dispose (GstCameraBinImage * img)
-{
- g_string_free (img->filename, TRUE);
- img->filename = NULL;
-
- if (img->user_enc) {
- gst_object_unref (img->user_enc);
- img->user_enc = NULL;
- }
-
- if (img->post) {
- gst_object_unref (img->post);
- img->post = NULL;
- }
-
- G_OBJECT_CLASS (parent_class)->dispose ((GObject *) img);
-}
-
-static GstStateChangeReturn
-gst_camerabin_image_change_state (GstElement * element,
- GstStateChange transition)
-{
- GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
- GstCameraBinImage *img = GST_CAMERABIN_IMAGE (element);
-
- switch (transition) {
- case GST_STATE_CHANGE_NULL_TO_READY:
- if (!gst_camerabin_image_create_elements (img)) {
- return GST_STATE_CHANGE_FAILURE;
- }
- /* Allow setting filename when image bin in READY state */
- gst_element_set_locked_state (img->sink, TRUE);
- break;
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- gst_element_set_locked_state (img->sink, FALSE);
- break;
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- /* Set sink to NULL in order to write the file _now_ */
- GST_INFO ("write img file: %s", img->filename->str);
- gst_element_set_locked_state (img->sink, TRUE);
- gst_element_set_state (img->sink, GST_STATE_NULL);
- break;
- default:
- break;
- }
-
- ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
- switch (transition) {
- case GST_STATE_CHANGE_READY_TO_NULL:
- gst_camerabin_image_destroy_elements (img);
- break;
- default:
- break;
- }
-
- return ret;
-}
-
-gboolean
-gst_camerabin_image_send_event (GstElement * element, GstEvent * event)
-{
- GstCameraBinImage *bin = GST_CAMERABIN_IMAGE (element);
- gboolean ret = FALSE;
-
- GST_INFO ("got %s event", GST_EVENT_TYPE_NAME (event));
-
- if (GST_EVENT_IS_DOWNSTREAM (event)) {
- ret = gst_pad_send_event (bin->sinkpad, event);
- } else {
- if (bin->sink) {
- ret = gst_element_send_event (bin->sink, event);
- } else {
- GST_WARNING ("upstream event handling failed");
- }
- }
-
- return ret;
-}
-
-static void
-gst_camerabin_image_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec)
-{
- GstCameraBinImage *bin = GST_CAMERABIN_IMAGE (object);
-
- switch (prop_id) {
- case PROP_FILENAME:
- g_string_assign (bin->filename, g_value_get_string (value));
- if (bin->sink) {
- g_object_set (G_OBJECT (bin->sink), "location", bin->filename->str,
- NULL);
- } else {
- GST_INFO ("no sink, not setting name yet");
- }
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_camerabin_image_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec)
-{
- GstCameraBinImage *bin = GST_CAMERABIN_IMAGE (object);
-
- switch (prop_id) {
- case PROP_FILENAME:
- g_value_set_string (value, bin->filename->str);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-/*
- * static helper functions implementation
- */
-
-/**
- * metadata_write_probe:
- * @pad: sink pad of metadata muxer
- * @buffer: received buffer
- * @u_data: image bin object
- *
- * Buffer probe that sets Xmp.dc.type and Xmp.dc.format tags
- * to metadata muxer based on preceding element src pad caps.
- *
- * Returns: TRUE always
- */
-static gboolean
-metadata_write_probe (GstPad * pad, GstBuffer * buffer, gpointer u_data)
-{
- /* Add XMP tags */
- GstCameraBinImage *img = NULL;
- GstTagSetter *setter = NULL;
- GstPad *srcpad = NULL;
- GstCaps *caps = NULL;
- GstStructure *st = NULL;
-
- img = GST_CAMERABIN_IMAGE (u_data);
-
- g_return_val_if_fail (img != NULL, TRUE);
-
- setter = GST_TAG_SETTER (img->meta_mux);
-
- if (!setter) {
- GST_WARNING_OBJECT (img, "setting tags failed");
- goto done;
- }
-
- /* Xmp.dc.type tag */
- gst_tag_setter_add_tags (setter, GST_TAG_MERGE_REPLACE,
- GST_TAG_CODEC, "Image", NULL);
- /* Xmp.dc.format tag */
- if (img->enc) {
- srcpad = gst_element_get_static_pad (img->enc, "src");
- }
- GST_LOG_OBJECT (img, "srcpad:%" GST_PTR_FORMAT, srcpad);
- if (srcpad) {
- caps = gst_pad_get_negotiated_caps (srcpad);
- GST_LOG_OBJECT (img, "caps:%" GST_PTR_FORMAT, caps);
- if (caps) {
- /* If there are many structures, we can't know which one to use */
- if (gst_caps_get_size (caps) != 1) {
- GST_WARNING_OBJECT (img, "can't decide structure for format tag");
- goto done;
- }
- st = gst_caps_get_structure (caps, 0);
- if (st) {
- GST_DEBUG_OBJECT (img, "Xmp.dc.format:%s", gst_structure_get_name (st));
- gst_tag_setter_add_tags (setter, GST_TAG_MERGE_REPLACE,
- GST_TAG_VIDEO_CODEC, gst_structure_get_name (st), NULL);
- }
- }
- }
-done:
- if (caps)
- gst_caps_unref (caps);
- if (srcpad)
- gst_object_unref (srcpad);
-
- return TRUE;
-}
-
-
-/**
- * gst_camerabin_image_create_elements:
- * @img: a pointer to #GstCameraBinImage object
- *
- * This function creates needed #GstElements and resources to capture images.
- * Use gst_camerabin_image_destroy_elements to release these resources.
- *
- * Image bin:
- * img->sinkpad ! [ post process !] tee name=t0 ! encoder ! metadata ! filesink
- * t0. ! queue ! img->srcpad
- *
- * Returns: %TRUE if succeeded or FALSE if failed
- */
-static gboolean
-gst_camerabin_image_create_elements (GstCameraBinImage * img)
-{
- GstPad *sinkpad = NULL, *img_sinkpad = NULL, *img_srcpad = NULL;
- gboolean ret = FALSE;
- GstBin *imgbin = NULL;
-
- g_return_val_if_fail (img != NULL, FALSE);
-
- GST_DEBUG ("creating image capture elements");
-
- imgbin = GST_BIN (img);
-
- if (img->elements_created) {
- GST_WARNING ("elements already created");
- ret = TRUE;
- goto done;
- } else {
- img->elements_created = TRUE;
- }
-
- /* Create image pre/post-processing element if any */
- if (img->post) {
- if (!gst_camerabin_add_element (imgbin, img->post)) {
- goto done;
- }
- img_sinkpad = gst_element_get_static_pad (img->post, "sink");
- }
-
- /* Create tee */
- if (!(img->tee = gst_camerabin_create_and_add_element (imgbin, "tee"))) {
- goto done;
- }
-
- /* Set up sink ghost pad for img bin */
- if (!img_sinkpad) {
- img_sinkpad = gst_element_get_static_pad (img->tee, "sink");
- }
- gst_ghost_pad_set_target (GST_GHOST_PAD (img->sinkpad), img_sinkpad);
-
- /* Add colorspace converter */
- img->pad_tee_enc = gst_element_get_request_pad (img->tee, "src%d");
- if (!gst_camerabin_create_and_add_element (imgbin, "ffmpegcolorspace")) {
- goto done;
- }
-
- /* Create image encoder */
- if (img->user_enc) {
- img->enc = img->user_enc;
- if (!gst_camerabin_add_element (imgbin, img->enc)) {
- goto done;
- }
- } else if (!(img->enc =
- gst_camerabin_create_and_add_element (imgbin, DEFAULT_ENC))) {
- goto done;
- }
-
- /* Create metadata element */
- if (!(img->meta_mux =
- gst_camerabin_create_and_add_element (imgbin, DEFAULT_META_MUX))) {
- goto done;
- }
- /* Add probe for XMP metadata writing */
- sinkpad = gst_element_get_static_pad (img->meta_mux, "sink");
- gst_pad_add_buffer_probe (sinkpad, G_CALLBACK (metadata_write_probe), img);
- gst_object_unref (sinkpad);
- /* Set "Intel" exif byte-order if possible */
- if (g_object_class_find_property (G_OBJECT_GET_CLASS (img->meta_mux),
- "exif-byte-order")) {
- g_object_set (G_OBJECT (img->meta_mux), "exif-byte-order", 1, NULL);
- }
-
- /* Create file sink element */
- if (!(img->sink =
- gst_camerabin_create_and_add_element (imgbin, DEFAULT_SINK))) {
- goto done;
- }
-
- /* Create queue element leading to view finder, attaches it to the tee */
- img->pad_tee_view = gst_element_get_request_pad (img->tee, "src%d");
- if (!(img->queue = gst_camerabin_create_and_add_element (imgbin, "queue"))) {
- goto done;
- }
-
- /* Set properties */
- g_object_set (G_OBJECT (img->sink), "location", img->filename->str, NULL);
- g_object_set (G_OBJECT (img->sink), "async", FALSE, NULL);
-
- g_object_set (G_OBJECT (img->queue), "max-size-buffers", 1, "leaky", 2, NULL);
-
- /* Set up src ghost pad for img bin */
- img_srcpad = gst_element_get_static_pad (img->queue, "src");
- gst_ghost_pad_set_target (GST_GHOST_PAD (img->srcpad), img_srcpad);
-
- /* Never let image bin eos events reach view finder */
- gst_pad_add_event_probe (img->srcpad,
- G_CALLBACK (gst_camerabin_drop_eos_probe), img);
-
- ret = TRUE;
-
-done:
-
- if (img_srcpad) {
- gst_object_unref (img_srcpad);
- }
- if (img_sinkpad) {
- gst_object_unref (img_sinkpad);
- }
- if (!ret) {
- gst_camerabin_image_destroy_elements (img);
- }
-
- return ret;
-}
-
-
-/**
- * gst_camerabin_image_destroy_elements:
- * @img: a pointer to #GstCameraBinImage object
- *
- * This function releases resources allocated in
- * gst_camerabin_image_create_elements.
- *
- */
-static void
-gst_camerabin_image_destroy_elements (GstCameraBinImage * img)
-{
- GST_LOG ("destroying img elements");
- if (img->pad_tee_enc) {
- gst_element_release_request_pad (img->tee, img->pad_tee_enc);
- img->pad_tee_enc = NULL;
- }
-
- if (img->pad_tee_view) {
- gst_element_release_request_pad (img->tee, img->pad_tee_view);
- img->pad_tee_view = NULL;
- }
-
- gst_ghost_pad_set_target (GST_GHOST_PAD (img->sinkpad), NULL);
- gst_ghost_pad_set_target (GST_GHOST_PAD (img->srcpad), NULL);
-
- gst_camerabin_remove_elements_from_bin (GST_BIN (img));
-
- img->post = NULL;
- img->tee = NULL;
- img->enc = NULL;
- img->meta_mux = NULL;
- img->sink = NULL;
- img->queue = NULL;
-
- img->elements_created = FALSE;
-}
-
-void
-gst_camerabin_image_set_encoder (GstCameraBinImage * img, GstElement * encoder)
-{
- if (img->user_enc)
- gst_object_unref (img->user_enc);
- if (encoder)
- gst_object_ref (encoder);
-
- img->user_enc = encoder;
-}
-
-void
-gst_camerabin_image_set_postproc (GstCameraBinImage * img,
- GstElement * postproc)
-{
- if (img->post)
- gst_object_unref (img->post);
- if (postproc)
- gst_object_ref (postproc);
-
- img->post = postproc;
-}
-
-GstElement *
-gst_camerabin_image_get_encoder (GstCameraBinImage * img)
-{
- GstElement *enc;
-
- if (img->user_enc) {
- enc = img->user_enc;
- } else {
- enc = img->enc;
- }
-
- return enc;
-}
-
-GstElement *
-gst_camerabin_image_get_postproc (GstCameraBinImage * img)
-{
- return img->post;
-}