diff -r 9b2c3c7a1a9c -r 567bb019e3e3 gst_plugins_good/gst/camerabin/camerabinimage.c --- a/gst_plugins_good/gst/camerabin/camerabinimage.c Wed Mar 31 22:03:18 2010 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,571 +0,0 @@ -/* - * GStreamer - * Copyright (C) 2008 Nokia Corporation - * - * 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 - * - * - * - * - * The pipeline for this module is: - * - * - * - *----------------------------------------------------------------------------- - * (src0) -> queue -> - * -> [post proc] -> tee < - * (src1) -> imageenc -> metadatamuxer -> filesink - *----------------------------------------------------------------------------- - * - * - * - * 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. - * - * - * - */ - -/* - * includes - */ - -#include - -#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 \n" - "Nokia Corporation "); - -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; -}