/* * GStreamer * Copyright (C) 2010 Texas Instruments, Inc * Copyright (C) 2010 Thiago Santos * * 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-wrappercamerabinsrc * * A camera bin src element that wraps a default video source with a single * pad into the 3pad model that camerabin2 expects. */ #ifdef HAVE_CONFIG_H # include #endif #include "gstwrappercamerabinsrc.h" #include "camerabingeneral.h" enum { PROP_0, PROP_VIDEO_SRC }; /* Using "bilinear" as default zoom method */ #define CAMERABIN_DEFAULT_ZOOM_METHOD 1 GST_DEBUG_CATEGORY (wrapper_camera_bin_src_debug); #define GST_CAT_DEFAULT wrapper_camera_bin_src_debug GST_BOILERPLATE (GstWrapperCameraBinSrc, gst_wrapper_camera_bin_src, GstBaseCameraSrc, GST_TYPE_BASE_CAMERA_SRC); static void set_capsfilter_caps (GstWrapperCameraBinSrc * self, GstCaps * new_caps); static void gst_wrapper_camera_bin_src_dispose (GObject * object) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (object); if (self->app_vid_src) { gst_object_unref (self->app_vid_src); self->app_vid_src = NULL; } G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_wrapper_camera_bin_src_finalize (GstWrapperCameraBinSrc * self) { G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (self)); } static void gst_wrapper_camera_bin_src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (object); switch (prop_id) { case PROP_VIDEO_SRC: if (GST_STATE (self) != GST_STATE_NULL) { GST_ELEMENT_ERROR (self, CORE, FAILED, ("camerasrc must be in NULL state when setting the video source element"), (NULL)); } else { if (self->app_vid_src) gst_object_unref (self->app_vid_src); self->app_vid_src = g_value_get_object (value); if (self->app_vid_src) gst_object_ref (self->app_vid_src); } break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (self, prop_id, pspec); break; } } static void gst_wrapper_camera_bin_src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (object); switch (prop_id) { case PROP_VIDEO_SRC: if (self->src_vid_src) g_value_set_object (value, self->src_vid_src); else g_value_set_object (value, self->app_vid_src); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (self, prop_id, pspec); break; } } static void gst_wrapper_camera_bin_reset_video_src_caps (GstWrapperCameraBinSrc * self, GstCaps * caps) { GstClock *clock; gint64 base_time; GST_DEBUG_OBJECT (self, "Resetting src caps to %" GST_PTR_FORMAT, caps); if (self->src_vid_src) { clock = gst_element_get_clock (self->src_vid_src); base_time = gst_element_get_base_time (self->src_vid_src); gst_element_set_state (self->src_vid_src, GST_STATE_NULL); set_capsfilter_caps (self, caps); self->drop_newseg = TRUE; GST_DEBUG_OBJECT (self, "Bringing source up"); gst_element_sync_state_with_parent (self->src_vid_src); if (clock) { gst_element_set_clock (self->src_vid_src, clock); gst_element_set_base_time (self->src_vid_src, base_time); if (GST_IS_BIN (self->src_vid_src)) { GstIterator *it = gst_bin_iterate_elements (GST_BIN (self->src_vid_src)); gpointer item = NULL; gboolean done = FALSE; while (!done) { switch (gst_iterator_next (it, &item)) { case GST_ITERATOR_OK: gst_element_set_base_time (GST_ELEMENT (item), base_time); gst_object_unref (item); break; case GST_ITERATOR_RESYNC: gst_iterator_resync (it); break; case GST_ITERATOR_ERROR: done = TRUE; break; case GST_ITERATOR_DONE: done = TRUE; break; } } gst_iterator_free (it); } gst_object_unref (clock); } } } /** * gst_wrapper_camera_bin_src_imgsrc_probe: * * Buffer probe called before sending each buffer to image queue. */ static gboolean gst_wrapper_camera_bin_src_imgsrc_probe (GstPad * pad, GstBuffer * buffer, gpointer data) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (data); GstBaseCameraSrc *camerasrc = GST_BASE_CAMERA_SRC (data); gboolean ret = FALSE; GST_LOG_OBJECT (self, "Image probe, mode %d, capture count %d", camerasrc->mode, self->image_capture_count); g_mutex_lock (camerasrc->capturing_mutex); if (self->image_capture_count > 0) { ret = TRUE; self->image_capture_count--; /* post preview */ /* TODO This can likely be optimized if the viewfinder caps is the same as * the preview caps, avoiding another scaling of the same buffer. */ GST_DEBUG_OBJECT (self, "Posting preview for image"); gst_base_camera_src_post_preview (camerasrc, buffer); if (self->image_capture_count == 0) { gst_base_camera_src_finish_capture (camerasrc); } } g_mutex_unlock (camerasrc->capturing_mutex); return ret; } /** * gst_wrapper_camera_bin_src_vidsrc_probe: * * Buffer probe called before sending each buffer to image queue. */ static gboolean gst_wrapper_camera_bin_src_vidsrc_probe (GstPad * pad, GstBuffer * buffer, gpointer data) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (data); GstBaseCameraSrc *camerasrc = GST_BASE_CAMERA_SRC_CAST (self); gboolean ret = FALSE; GST_LOG_OBJECT (self, "Video probe, mode %d, capture status %d", camerasrc->mode, self->video_rec_status); /* TODO do we want to lock for every buffer? */ /* * Note that we can use gst_pad_push_event here because we are a buffer * probe. */ /* TODO shouldn't access this directly */ g_mutex_lock (camerasrc->capturing_mutex); if (self->video_rec_status == GST_VIDEO_RECORDING_STATUS_DONE) { /* NOP */ } else if (self->video_rec_status == GST_VIDEO_RECORDING_STATUS_STARTING) { gint64 start = 0; if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer))) start = GST_BUFFER_TIMESTAMP (buffer); /* send the newseg */ GST_DEBUG_OBJECT (self, "Starting video recording, pushing newsegment"); gst_pad_push_event (pad, gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, start, -1, 0)); self->video_rec_status = GST_VIDEO_RECORDING_STATUS_RUNNING; /* post preview */ GST_DEBUG_OBJECT (self, "Posting preview for video"); gst_base_camera_src_post_preview (camerasrc, buffer); ret = TRUE; } else if (self->video_rec_status == GST_VIDEO_RECORDING_STATUS_FINISHING) { /* send eos */ GST_DEBUG_OBJECT (self, "Finishing video recording, pushing eos"); gst_pad_push_event (pad, gst_event_new_eos ()); self->video_rec_status = GST_VIDEO_RECORDING_STATUS_DONE; gst_base_camera_src_finish_capture (camerasrc); } else { ret = TRUE; } g_mutex_unlock (camerasrc->capturing_mutex); return ret; } static gboolean gst_wrapper_camera_bin_src_event (GstPad * pad, GstEvent * event) { GstWrapperCameraBinSrc *src = GST_WRAPPER_CAMERA_BIN_SRC (GST_PAD_PARENT (pad)); const GstStructure *structure; structure = gst_event_get_structure (event); if (structure && gst_structure_has_name (structure, "renegotiate")) { GST_DEBUG_OBJECT (src, "Received renegotiate on pad %s", GST_PAD_NAME (pad)); if (pad == src->imgsrc) { src->image_renegotiate = TRUE; } else if (pad == src->vidsrc) { src->video_renegotiate = TRUE; } } return src->srcpad_event_func (pad, event); } static gboolean gst_wrapper_camera_src_src_event_probe (GstPad * pad, GstEvent * evt, gpointer udata) { gboolean ret = TRUE; GstWrapperCameraBinSrc *self = udata; switch (GST_EVENT_TYPE (evt)) { case GST_EVENT_EOS: /* drop */ ret = FALSE; break; case GST_EVENT_NEWSEGMENT: if (self->drop_newseg) { ret = FALSE; self->drop_newseg = FALSE; } break; default: break; } return ret; } /** * gst_wrapper_camera_bin_src_construct_pipeline: * @bcamsrc: camerasrc object * * This function creates and links the elements of the camerasrc bin * videosrc ! cspconv ! capsfilter ! crop ! scale ! capsfilter ! tee name=t ! * t. ! ... (viewfinder pad) * t. ! output-selector name=outsel * outsel. ! (image pad) * outsel. ! (video pad) * * Returns: TRUE, if elements were successfully created, FALSE otherwise */ static gboolean gst_wrapper_camera_bin_src_construct_pipeline (GstBaseCameraSrc * bcamsrc) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc); GstBin *cbin = GST_BIN (bcamsrc); GstElement *tee; gboolean ret = FALSE; GstElement *videoscale; GstPad *vf_pad; GstPad *tee_capture_pad; if (!self->elements_created) { GST_DEBUG_OBJECT (self, "constructing pipeline"); /* Add application set or default video src element */ if (!(self->src_vid_src = gst_camerabin_setup_default_element (cbin, self->app_vid_src, "autovideosrc", DEFAULT_VIDEOSRC, "camerasrc-real-src"))) { self->src_vid_src = NULL; goto done; } else { if (!gst_camerabin_add_element (cbin, self->src_vid_src)) { goto done; } } /* we lost the reference */ self->app_vid_src = NULL; /* add a buffer probe to the src elemento to drop EOS from READY->NULL */ { GstPad *pad; pad = gst_element_get_static_pad (self->src_vid_src, "src"); self->src_event_probe_id = gst_pad_add_event_probe (pad, (GCallback) gst_wrapper_camera_src_src_event_probe, self); gst_object_unref (pad); } if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace", "src-colorspace")) goto done; if (!(self->src_filter = gst_camerabin_create_and_add_element (cbin, "capsfilter", "src-capsfilter"))) goto done; if (!(self->src_zoom_crop = gst_camerabin_create_and_add_element (cbin, "videocrop", "zoom-crop"))) goto done; if (!(self->src_zoom_scale = gst_camerabin_create_and_add_element (cbin, "videoscale", "zoom-scale"))) goto done; if (!(self->src_zoom_filter = gst_camerabin_create_and_add_element (cbin, "capsfilter", "zoom-capsfilter"))) goto done; if (!(tee = gst_camerabin_create_and_add_element (cbin, "tee", "camerasrc-tee"))) goto done; /* viewfinder pad */ vf_pad = gst_element_get_request_pad (tee, "src%d"); g_object_set (tee, "alloc-pad", vf_pad, NULL); gst_object_unref (vf_pad); /* the viewfinder should always work, so we add some converters to it */ if (!gst_camerabin_create_and_add_element (cbin, "ffmpegcolorspace", "viewfinder-colorspace")) goto done; if (!(videoscale = gst_camerabin_create_and_add_element (cbin, "videoscale", "viewfinder-scale"))) goto done; /* image/video pad from tee */ tee_capture_pad = gst_element_get_request_pad (tee, "src%d"); self->output_selector = gst_element_factory_make ("output-selector", "outsel"); g_object_set (self->output_selector, "pad-negotiation-mode", 0, NULL); gst_bin_add (GST_BIN (self), self->output_selector); { GstPad *pad = gst_element_get_static_pad (self->output_selector, "sink"); /* check return TODO */ gst_pad_link (tee_capture_pad, pad); gst_object_unref (pad); } gst_object_unref (tee_capture_pad); /* Create the 2 output pads for video and image */ self->outsel_vidpad = gst_element_get_request_pad (self->output_selector, "src%d"); self->outsel_imgpad = gst_element_get_request_pad (self->output_selector, "src%d"); g_assert (self->outsel_vidpad != NULL); g_assert (self->outsel_imgpad != NULL); gst_pad_add_buffer_probe (self->outsel_imgpad, G_CALLBACK (gst_wrapper_camera_bin_src_imgsrc_probe), self); gst_pad_add_buffer_probe (self->outsel_vidpad, G_CALLBACK (gst_wrapper_camera_bin_src_vidsrc_probe), self); gst_ghost_pad_set_target (GST_GHOST_PAD (self->imgsrc), self->outsel_imgpad); gst_ghost_pad_set_target (GST_GHOST_PAD (self->vidsrc), self->outsel_vidpad); if (bcamsrc->mode == MODE_IMAGE) { g_object_set (self->output_selector, "active-pad", self->outsel_imgpad, NULL); } else { g_object_set (self->output_selector, "active-pad", self->outsel_vidpad, NULL); } /* hook-up the vf ghostpad */ vf_pad = gst_element_get_static_pad (videoscale, "src"); gst_ghost_pad_set_target (GST_GHOST_PAD (self->vfsrc), vf_pad); gst_object_unref (vf_pad); gst_pad_set_active (self->vfsrc, TRUE); gst_pad_set_active (self->imgsrc, TRUE); /* XXX ??? */ gst_pad_set_active (self->vidsrc, TRUE); /* XXX ??? */ } ret = TRUE; self->elements_created = TRUE; done: return ret; } static gboolean copy_missing_fields (GQuark field_id, const GValue * value, gpointer user_data) { GstStructure *st = (GstStructure *) user_data; const GValue *val = gst_structure_id_get_value (st, field_id); if (G_UNLIKELY (val == NULL)) { gst_structure_id_set_value (st, field_id, value); } return TRUE; } /** * adapt_image_capture: * @self: camerasrc object * @in_caps: caps object that describes incoming image format * * Adjust capsfilters and crop according image capture caps if necessary. * The captured image format from video source might be different from * what application requested, so we can try to fix that in camerabin. * */ static void adapt_image_capture (GstWrapperCameraBinSrc * self, GstCaps * in_caps) { GstBaseCameraSrc *bcamsrc = GST_BASE_CAMERA_SRC (self); GstStructure *in_st, *new_st, *req_st; gint in_width = 0, in_height = 0, req_width = 0, req_height = 0, crop = 0; gdouble ratio_w, ratio_h; GstCaps *filter_caps = NULL; GST_LOG_OBJECT (self, "in caps: %" GST_PTR_FORMAT, in_caps); GST_LOG_OBJECT (self, "requested caps: %" GST_PTR_FORMAT, self->image_capture_caps); in_st = gst_caps_get_structure (in_caps, 0); gst_structure_get_int (in_st, "width", &in_width); gst_structure_get_int (in_st, "height", &in_height); req_st = gst_caps_get_structure (self->image_capture_caps, 0); gst_structure_get_int (req_st, "width", &req_width); gst_structure_get_int (req_st, "height", &req_height); GST_INFO_OBJECT (self, "we requested %dx%d, and got %dx%d", req_width, req_height, in_width, in_height); new_st = gst_structure_copy (req_st); /* If new fields have been added, we need to copy them */ gst_structure_foreach (in_st, copy_missing_fields, new_st); gst_structure_set (new_st, "width", G_TYPE_INT, in_width, "height", G_TYPE_INT, in_height, NULL); GST_LOG_OBJECT (self, "new image capture caps: %" GST_PTR_FORMAT, new_st); /* Crop if requested aspect ratio differs from incoming frame aspect ratio */ if (self->src_zoom_crop) { ratio_w = (gdouble) in_width / req_width; ratio_h = (gdouble) in_height / req_height; if (ratio_w < ratio_h) { crop = in_height - (req_height * ratio_w); self->base_crop_top = crop / 2; self->base_crop_bottom = crop / 2; } else { crop = in_width - (req_width * ratio_h); self->base_crop_left = crop / 2; self->base_crop_right += crop / 2; } GST_INFO_OBJECT (self, "setting base crop: left:%d, right:%d, top:%d, bottom:%d", self->base_crop_left, self->base_crop_right, self->base_crop_top, self->base_crop_bottom); g_object_set (G_OBJECT (self->src_zoom_crop), "top", self->base_crop_top, "bottom", self->base_crop_bottom, "left", self->base_crop_left, "right", self->base_crop_right, NULL); } /* Update capsfilters */ if (self->image_capture_caps) { gst_caps_unref (self->image_capture_caps); } self->image_capture_caps = gst_caps_new_full (new_st, NULL); set_capsfilter_caps (self, self->image_capture_caps); /* Adjust the capsfilter before crop and videoscale elements if necessary */ if (in_width == bcamsrc->width && in_height == bcamsrc->height) { GST_DEBUG_OBJECT (self, "no adaptation with resolution needed"); } else { GST_DEBUG_OBJECT (self, "changing %" GST_PTR_FORMAT " from %dx%d to %dx%d", self->src_filter, bcamsrc->width, bcamsrc->height, in_width, in_height); /* Apply the width and height to filter caps */ g_object_get (G_OBJECT (self->src_filter), "caps", &filter_caps, NULL); filter_caps = gst_caps_make_writable (filter_caps); gst_caps_set_simple (filter_caps, "width", G_TYPE_INT, in_width, "height", G_TYPE_INT, in_height, NULL); g_object_set (G_OBJECT (self->src_filter), "caps", filter_caps, NULL); gst_caps_unref (filter_caps); } } /** * img_capture_prepared: * @data: camerasrc object * @caps: caps describing the prepared image format * * Callback which is called after image capture has been prepared. */ static void img_capture_prepared (gpointer data, GstCaps * caps) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (data); GST_INFO_OBJECT (self, "image capture prepared"); /* It is possible we are about to get something else that we requested */ if (!gst_caps_is_equal (self->image_capture_caps, caps)) { adapt_image_capture (self, caps); } else { set_capsfilter_caps (self, self->image_capture_caps); } } /** * */ static gboolean start_image_capture (GstWrapperCameraBinSrc * self) { GstBaseCameraSrc *bcamsrc = GST_BASE_CAMERA_SRC (self); GstPhotography *photography = gst_base_camera_src_get_photography (bcamsrc); gboolean ret = FALSE; GstCaps *caps; GST_DEBUG_OBJECT (self, "Starting image capture"); if (self->image_renegotiate) { /* clean capsfilter caps so they don't interfere here */ g_object_set (self->src_filter, "caps", NULL, NULL); if (self->src_zoom_filter) g_object_set (self->src_zoom_filter, "caps", NULL, NULL); caps = gst_pad_get_allowed_caps (self->imgsrc); gst_caps_replace (&self->image_capture_caps, caps); gst_caps_unref (caps); self->image_renegotiate = FALSE; } if (photography) { GST_DEBUG_OBJECT (self, "prepare image capture caps %" GST_PTR_FORMAT, self->image_capture_caps); ret = gst_photography_prepare_for_capture (photography, (GstPhotoCapturePrepared) img_capture_prepared, self->image_capture_caps, self); } else { g_mutex_unlock (bcamsrc->capturing_mutex); gst_wrapper_camera_bin_reset_video_src_caps (self, self->image_capture_caps); g_mutex_lock (bcamsrc->capturing_mutex); ret = TRUE; } return ret; } static gboolean gst_wrapper_camera_bin_src_set_mode (GstBaseCameraSrc * bcamsrc, GstCameraBinMode mode) { GstPhotography *photography = gst_base_camera_src_get_photography (bcamsrc); GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc); self->mode = mode; if (self->output_selector) { if (mode == MODE_IMAGE) { g_object_set (self->output_selector, "active-pad", self->outsel_imgpad, NULL); } else { g_object_set (self->output_selector, "active-pad", self->outsel_vidpad, NULL); } } if (photography) { if (g_object_class_find_property (G_OBJECT_GET_CLASS (photography), "capture-mode")) { g_object_set (G_OBJECT (photography), "capture-mode", mode, NULL); } } else { gst_wrapper_camera_bin_reset_video_src_caps (self, NULL); } return TRUE; } static gboolean set_videosrc_zoom (GstWrapperCameraBinSrc * self, gint zoom) { gboolean ret = FALSE; if (g_object_class_find_property (G_OBJECT_GET_CLASS (self->src_vid_src), "zoom")) { g_object_set (G_OBJECT (self->src_vid_src), "zoom", (gfloat) zoom / 100, NULL); ret = TRUE; } return ret; } static gboolean set_element_zoom (GstWrapperCameraBinSrc * self, gint zoom) { gboolean ret = FALSE; GstBaseCameraSrc *bcamsrc = GST_BASE_CAMERA_SRC (self); gint w2_crop = 0, h2_crop = 0; GstPad *pad_zoom_sink = NULL; gint left = self->base_crop_left; gint right = self->base_crop_right; gint top = self->base_crop_top; gint bottom = self->base_crop_bottom; if (self->src_zoom_crop) { /* Update capsfilters to apply the zoom */ GST_INFO_OBJECT (self, "zoom: %d, orig size: %dx%d", zoom, bcamsrc->width, bcamsrc->height); if (zoom != ZOOM_1X) { w2_crop = (bcamsrc->width - (bcamsrc->width * ZOOM_1X / zoom)) / 2; h2_crop = (bcamsrc->height - (bcamsrc->height * ZOOM_1X / zoom)) / 2; left += w2_crop; right += w2_crop; top += h2_crop; bottom += h2_crop; /* force number of pixels cropped from left to be even, to avoid slow code * path on videoscale */ left &= 0xFFFE; } pad_zoom_sink = gst_element_get_static_pad (self->src_zoom_crop, "sink"); GST_INFO_OBJECT (self, "sw cropping: left:%d, right:%d, top:%d, bottom:%d", left, right, top, bottom); GST_PAD_STREAM_LOCK (pad_zoom_sink); g_object_set (self->src_zoom_crop, "left", left, "right", right, "top", top, "bottom", bottom, NULL); GST_PAD_STREAM_UNLOCK (pad_zoom_sink); gst_object_unref (pad_zoom_sink); ret = TRUE; } return ret; } static void gst_wrapper_camera_bin_src_set_zoom (GstBaseCameraSrc * bcamsrc, gint zoom) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc); GST_INFO_OBJECT (self, "setting zoom %d", zoom); if (set_videosrc_zoom (self, zoom)) { set_element_zoom (self, ZOOM_1X); GST_INFO_OBJECT (self, "zoom set using videosrc"); } else if (set_element_zoom (self, zoom)) { GST_INFO_OBJECT (self, "zoom set using gst elements"); } else { GST_INFO_OBJECT (self, "setting zoom failed"); } } static GstCaps * gst_wrapper_camera_bin_src_get_allowed_input_caps (GstBaseCameraSrc * bcamsrc) { GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (bcamsrc); GstCaps *caps = NULL; GstPad *pad = NULL, *peer_pad = NULL; GstState state; GstElement *videosrc; videosrc = self->src_vid_src ? self->src_vid_src : self->app_vid_src; if (!videosrc) { GST_WARNING_OBJECT (self, "no videosrc, can't get allowed caps"); goto failed; } if (self->allowed_caps) { GST_DEBUG_OBJECT (self, "returning cached caps"); goto done; } pad = gst_element_get_static_pad (videosrc, "src"); if (!pad) { GST_WARNING_OBJECT (self, "no srcpad in videosrc"); goto failed; } state = GST_STATE (videosrc); /* Make this function work also in NULL state */ if (state == GST_STATE_NULL) { GST_DEBUG_OBJECT (self, "setting videosrc to ready temporarily"); peer_pad = gst_pad_get_peer (pad); if (peer_pad) { gst_pad_unlink (pad, peer_pad); } /* Set videosrc to READY to open video device */ gst_element_set_locked_state (videosrc, TRUE); gst_element_set_state (videosrc, GST_STATE_READY); } self->allowed_caps = gst_pad_get_caps (pad); /* Restore state and re-link if necessary */ if (state == GST_STATE_NULL) { GST_DEBUG_OBJECT (self, "restoring videosrc state %d", state); /* Reset videosrc to NULL state, some drivers seem to need this */ gst_element_set_state (videosrc, GST_STATE_NULL); if (peer_pad) { gst_pad_link (pad, peer_pad); gst_object_unref (peer_pad); } gst_element_set_locked_state (videosrc, FALSE); } gst_object_unref (pad); done: if (self->allowed_caps) { caps = gst_caps_copy (self->allowed_caps); } GST_DEBUG_OBJECT (self, "allowed caps:%" GST_PTR_FORMAT, caps); failed: return caps; } /** * update_aspect_filter: * @self: camerasrc object * @new_caps: new caps of next buffers arriving to view finder sink element * * Updates aspect ratio capsfilter to maintain aspect ratio, if we need to * scale frames for showing them in view finder. */ static void update_aspect_filter (GstWrapperCameraBinSrc * self, GstCaps * new_caps) { // XXX why not instead add a preserve-aspect-ratio property to videoscale? #if 0 if (camera->flags & GST_CAMERABIN_FLAG_VIEWFINDER_SCALE) { GstCaps *sink_caps, *ar_caps; GstStructure *st; gint in_w = 0, in_h = 0, sink_w = 0, sink_h = 0, target_w = 0, target_h = 0; gdouble ratio_w, ratio_h; GstPad *sink_pad; const GValue *range; sink_pad = gst_element_get_static_pad (camera->view_sink, "sink"); if (sink_pad) { sink_caps = gst_pad_get_caps (sink_pad); gst_object_unref (sink_pad); if (sink_caps) { if (!gst_caps_is_any (sink_caps)) { GST_DEBUG_OBJECT (camera, "sink element caps %" GST_PTR_FORMAT, sink_caps); /* Get maximum resolution that view finder sink accepts */ st = gst_caps_get_structure (sink_caps, 0); if (gst_structure_has_field_typed (st, "width", GST_TYPE_INT_RANGE)) { range = gst_structure_get_value (st, "width"); sink_w = gst_value_get_int_range_max (range); } if (gst_structure_has_field_typed (st, "height", GST_TYPE_INT_RANGE)) { range = gst_structure_get_value (st, "height"); sink_h = gst_value_get_int_range_max (range); } GST_DEBUG_OBJECT (camera, "sink element accepts max %dx%d", sink_w, sink_h); /* Get incoming frames' resolution */ if (sink_h && sink_w) { st = gst_caps_get_structure (new_caps, 0); gst_structure_get_int (st, "width", &in_w); gst_structure_get_int (st, "height", &in_h); GST_DEBUG_OBJECT (camera, "new caps with %dx%d", in_w, in_h); } } gst_caps_unref (sink_caps); } } /* If we get bigger frames than view finder sink accepts, then we scale. If we scale we need to adjust aspect ratio capsfilter caps in order to maintain aspect ratio while scaling. */ if (in_w && in_h && (in_w > sink_w || in_h > sink_h)) { ratio_w = (gdouble) sink_w / in_w; ratio_h = (gdouble) sink_h / in_h; if (ratio_w < ratio_h) { target_w = sink_w; target_h = (gint) (ratio_w * in_h); } else { target_w = (gint) (ratio_h * in_w); target_h = sink_h; } GST_DEBUG_OBJECT (camera, "setting %dx%d filter to maintain aspect ratio", target_w, target_h); ar_caps = gst_caps_copy (new_caps); gst_caps_set_simple (ar_caps, "width", G_TYPE_INT, target_w, "height", G_TYPE_INT, target_h, NULL); } else { GST_DEBUG_OBJECT (camera, "no scaling"); ar_caps = new_caps; } GST_DEBUG_OBJECT (camera, "aspect ratio filter caps %" GST_PTR_FORMAT, ar_caps); g_object_set (G_OBJECT (camera->aspect_filter), "caps", ar_caps, NULL); if (ar_caps != new_caps) gst_caps_unref (ar_caps); } #endif } /** * set_capsfilter_caps: * @self: camerasrc object * @new_caps: pointer to caps object to set * * Set given caps to camerabin capsfilters. */ static void set_capsfilter_caps (GstWrapperCameraBinSrc * self, GstCaps * new_caps) { GST_INFO_OBJECT (self, "new_caps:%" GST_PTR_FORMAT, new_caps); /* Update zoom */ gst_base_camera_src_setup_zoom (GST_BASE_CAMERA_SRC (self)); /* Update capsfilters */ g_object_set (G_OBJECT (self->src_filter), "caps", new_caps, NULL); if (self->src_zoom_filter) g_object_set (G_OBJECT (self->src_zoom_filter), "caps", new_caps, NULL); update_aspect_filter (self, new_caps); GST_INFO_OBJECT (self, "udpated"); } static gboolean gst_wrapper_camera_bin_src_start_capture (GstBaseCameraSrc * camerasrc) { GstWrapperCameraBinSrc *src = GST_WRAPPER_CAMERA_BIN_SRC (camerasrc); /* TODO should we access this directly? Maybe a macro is better? */ if (src->mode == MODE_IMAGE) { start_image_capture (src); src->image_capture_count = 1; } else if (src->mode == MODE_VIDEO) { GstCaps *caps = NULL; g_mutex_unlock (camerasrc->capturing_mutex); gst_wrapper_camera_bin_reset_video_src_caps (src, NULL); g_mutex_lock (camerasrc->capturing_mutex); if (src->video_renegotiate) { /* clean capsfilter caps so they don't interfere here */ g_object_set (src->src_filter, "caps", NULL, NULL); if (src->src_zoom_filter) g_object_set (src->src_zoom_filter, "caps", NULL, NULL); GST_DEBUG_OBJECT (src, "Getting allowed videosrc caps"); caps = gst_pad_get_allowed_caps (src->vidsrc); GST_DEBUG_OBJECT (src, "Video src caps %" GST_PTR_FORMAT, caps); src->video_renegotiate = FALSE; g_mutex_unlock (camerasrc->capturing_mutex); gst_wrapper_camera_bin_reset_video_src_caps (src, caps); g_mutex_lock (camerasrc->capturing_mutex); gst_caps_unref (caps); } if (src->video_rec_status == GST_VIDEO_RECORDING_STATUS_DONE) { src->video_rec_status = GST_VIDEO_RECORDING_STATUS_STARTING; } } else { g_assert_not_reached (); return FALSE; } return TRUE; } static void gst_wrapper_camera_bin_src_stop_capture (GstBaseCameraSrc * camerasrc) { GstWrapperCameraBinSrc *src = GST_WRAPPER_CAMERA_BIN_SRC (camerasrc); /* TODO shoud we access this directly? Maybe a macro is better? */ if (src->mode == MODE_VIDEO) { if (src->video_rec_status == GST_VIDEO_RECORDING_STATUS_STARTING) { GST_DEBUG_OBJECT (src, "Aborting, had not started recording"); src->video_rec_status = GST_VIDEO_RECORDING_STATUS_DONE; } else if (src->video_rec_status == GST_VIDEO_RECORDING_STATUS_RUNNING) { GST_DEBUG_OBJECT (src, "Marking video recording as finishing"); src->video_rec_status = GST_VIDEO_RECORDING_STATUS_FINISHING; } } else { src->image_capture_count = 0; } } static GstStateChangeReturn gst_wrapper_camera_bin_src_change_state (GstElement * element, GstStateChange trans) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (element); ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, trans); if (ret == GST_STATE_CHANGE_FAILURE) goto end; switch (trans) { case GST_STATE_CHANGE_PAUSED_TO_READY: self->drop_newseg = FALSE; break; case GST_STATE_CHANGE_READY_TO_NULL: break; case GST_STATE_CHANGE_NULL_TO_READY: break; default: break; } end: return ret; } static void gst_wrapper_camera_bin_src_base_init (gpointer g_class) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); GST_DEBUG_CATEGORY_INIT (wrapper_camera_bin_src_debug, "wrappercamerabinsrc", 0, "V4l2 camera src"); gst_element_class_set_details_simple (gstelement_class, "V4l2 camera src element for camerabin", "Source/Video", "V4l2 camera src element for camerabin", "Rob Clark "); } static void gst_wrapper_camera_bin_src_class_init (GstWrapperCameraBinSrcClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseCameraSrcClass *gstbasecamerasrc_class; gobject_class = G_OBJECT_CLASS (klass); gstelement_class = GST_ELEMENT_CLASS (klass); gstbasecamerasrc_class = GST_BASE_CAMERA_SRC_CLASS (klass); gobject_class->dispose = gst_wrapper_camera_bin_src_dispose; gobject_class->finalize = (GObjectFinalizeFunc) gst_wrapper_camera_bin_src_finalize; gobject_class->set_property = gst_wrapper_camera_bin_src_set_property; gobject_class->get_property = gst_wrapper_camera_bin_src_get_property; /* g_object_class_install_property .... */ g_object_class_install_property (gobject_class, PROP_VIDEO_SRC, g_param_spec_object ("video-src", "Video source", "The video source element to be used", GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstelement_class->change_state = gst_wrapper_camera_bin_src_change_state; gstbasecamerasrc_class->construct_pipeline = gst_wrapper_camera_bin_src_construct_pipeline; gstbasecamerasrc_class->set_zoom = gst_wrapper_camera_bin_src_set_zoom; gstbasecamerasrc_class->set_mode = gst_wrapper_camera_bin_src_set_mode; gstbasecamerasrc_class->get_allowed_input_caps = gst_wrapper_camera_bin_src_get_allowed_input_caps; gstbasecamerasrc_class->start_capture = gst_wrapper_camera_bin_src_start_capture; gstbasecamerasrc_class->stop_capture = gst_wrapper_camera_bin_src_stop_capture; } static void gst_wrapper_camera_bin_src_init (GstWrapperCameraBinSrc * self, GstWrapperCameraBinSrcClass * klass) { self->vfsrc = gst_ghost_pad_new_no_target (GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME, GST_PAD_SRC); gst_element_add_pad (GST_ELEMENT (self), self->vfsrc); self->imgsrc = gst_ghost_pad_new_no_target (GST_BASE_CAMERA_SRC_IMAGE_PAD_NAME, GST_PAD_SRC); gst_element_add_pad (GST_ELEMENT (self), self->imgsrc); self->vidsrc = gst_ghost_pad_new_no_target (GST_BASE_CAMERA_SRC_VIDEO_PAD_NAME, GST_PAD_SRC); gst_element_add_pad (GST_ELEMENT (self), self->vidsrc); self->srcpad_event_func = GST_PAD_EVENTFUNC (self->vfsrc); gst_pad_set_event_function (self->imgsrc, gst_wrapper_camera_bin_src_event); gst_pad_set_event_function (self->vidsrc, gst_wrapper_camera_bin_src_event); gst_pad_set_event_function (self->vfsrc, gst_wrapper_camera_bin_src_event); /* TODO where are variables reset? */ self->image_capture_count = 0; self->video_rec_status = GST_VIDEO_RECORDING_STATUS_DONE; self->video_renegotiate = FALSE; self->image_renegotiate = FALSE; self->mode = GST_BASE_CAMERA_SRC_CAST (self)->mode; } gboolean gst_wrapper_camera_bin_src_plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "wrappercamerabinsrc", GST_RANK_NONE, gst_wrapper_camera_bin_src_get_type ()); }