camerabin2: Move preview helper functions to basecamerabinsrc

Move preview helper functions to baseacamerabinsrc so they can
be reused by multiple camerabin2 sources.
This commit is contained in:
Thiago Santos 2011-02-03 12:02:14 -03:00
parent 9473c390e8
commit 0255584d90
6 changed files with 274 additions and 214 deletions

View file

@ -5,11 +5,13 @@ CLEANFILES = $(BUILT_SOURCES)
libgstbasecamerabinsrc_@GST_MAJORMINOR@_la_SOURCES = \
gstcamerabin-enum.c \
gstcamerabinpreview.c \
gstbasecamerasrc.c
libgstbasecamerabinsrc_@GST_MAJORMINOR@includedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/basecamerabinsrc
libgstbasecamerabinsrc_@GST_MAJORMINOR@include_HEADERS = \
gstcamerabin-enum.h \
gstcamerabinpreview.h \
gstbasecamerasrc.h
libgstbasecamerabinsrc_@GST_MAJORMINOR@_la_CFLAGS = \
@ -20,7 +22,7 @@ libgstbasecamerabinsrc_@GST_MAJORMINOR@_la_CFLAGS = \
libgstbasecamerabinsrc_@GST_MAJORMINOR@_la_LIBADD = \
$(top_builddir)/gst-libs/gst/interfaces/libgstphotography-@GST_MAJORMINOR@.la \
$(GST_PLUGINS_BASE_LIBS) -lgstinterfaces-$(GST_MAJORMINOR) \
$(GST_BASE_LIBS) $(GST_LIBS)
-lgstapp-$(GST_MAJORMINOR) $(GST_BASE_LIBS) $(GST_LIBS)
libgstbasecamerabinsrc_@GST_MAJORMINOR@_la_LDFLAGS = $(GST_LIB_LDFLAGS) $(GST_ALL_LDFLAGS) $(GST_LT_LDFLAGS)

View file

@ -0,0 +1,226 @@
/*
* 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:camerabingeneral
* @short_description: helper functions for #GstCameraBin and it's modules
*
* Common helper functions for #GstCameraBin, #GstCameraBinImage and
* #GstCameraBinVideo.
*
*/
#include <gst/app/gstappsrc.h>
#include <gst/app/gstappsink.h>
#include "gstcamerabinpreview.h"
#include "gstbasecamerasrc.h"
static GstFlowReturn
gst_camerabin_preview_pipeline_new_preroll (GstAppSink * appsink,
gpointer user_data)
{
GstBuffer *buffer;
buffer = gst_app_sink_pull_preroll (appsink);
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_camerabin_preview_pipeline_new_buffer (GstAppSink * appsink,
gpointer user_data)
{
GstBuffer *buffer;
GstStructure *s;
GstMessage *msg;
GstCameraBinPreviewPipelineData *data;
data = user_data;
buffer = gst_app_sink_pull_buffer (appsink);
s = gst_structure_new (GST_BASE_CAMERA_SRC_PREVIEW_MESSAGE_NAME,
"buffer", GST_TYPE_BUFFER, buffer, NULL);
gst_buffer_unref (buffer);
msg = gst_message_new_element (GST_OBJECT (data->element), s);
GST_DEBUG_OBJECT (data->element, "sending message with preview image");
if (gst_element_post_message (data->element, msg) == FALSE) {
GST_WARNING_OBJECT (data->element,
"This element has no bus, therefore no message sent!");
}
return GST_FLOW_OK;
}
/**
* gst_camerabin_create_preview_pipeline:
* @element: Owner of this pipeline
* @filter: Custom filter to process preview data (an extra ref is taken)
*
* Creates a new previewing pipeline that can receive buffers
* to be posted as camerabin preview messages for @element
*
* Returns: The newly created #GstCameraBinPreviewPipelineData
*/
GstCameraBinPreviewPipelineData *
gst_camerabin_create_preview_pipeline (GstElement * element,
GstElement * filter)
{
GstCameraBinPreviewPipelineData *data;
GstElement *csp;
GstElement *csp2;
GstElement *vscale;
gboolean added = FALSE;
GstAppSinkCallbacks callbacks = { 0, };
data = g_new (GstCameraBinPreviewPipelineData, 1);
data->pipeline = gst_pipeline_new ("preview-pipeline");
data->appsrc = gst_element_factory_make ("appsrc", "preview-appsrc");
data->capsfilter = gst_element_factory_make ("capsfilter",
"preview-capsfilter");
data->appsink = gst_element_factory_make ("appsink", "preview-appsink");
csp = gst_element_factory_make ("ffmpegcolorspace", "preview-csp0");
csp2 = gst_element_factory_make ("ffmpegcolorspace", "preview-csp1");
vscale = gst_element_factory_make ("videoscale", "preview-vscale");
if (!data->appsrc || !data->capsfilter || !data->appsink || !csp ||
!csp2 || !vscale) {
goto error;
}
gst_bin_add_many (GST_BIN (data->pipeline), data->appsrc, data->capsfilter,
data->appsink, csp, csp2, vscale, NULL);
if (filter)
gst_bin_add (GST_BIN (data->pipeline), gst_object_ref (filter));
added = TRUE;
if (filter) {
if (!gst_element_link_many (data->appsrc, filter, csp, vscale, csp2,
data->capsfilter, data->appsink, NULL))
goto error;
} else {
if (!gst_element_link_many (data->appsrc, csp, vscale, csp2,
data->capsfilter, data->appsink, NULL))
goto error;
}
callbacks.new_preroll = gst_camerabin_preview_pipeline_new_preroll;
callbacks.new_buffer = gst_camerabin_preview_pipeline_new_buffer;
gst_app_sink_set_callbacks ((GstAppSink *) data->appsink, &callbacks, data,
NULL);
g_object_set (data->appsink, "sync", FALSE, NULL);
data->element = element;
data->filter = filter;
return data;
error:
GST_WARNING ("Failed to create camerabin's preview pipeline");
if (!added) {
if (csp)
gst_object_unref (csp);
if (csp2)
gst_object_unref (csp2);
if (vscale)
gst_object_unref (vscale);
if (data->appsrc)
gst_object_unref (data->appsrc);
if (data->capsfilter)
gst_object_unref (data->capsfilter);
if (data->appsink)
gst_object_unref (data->appsink);
}
gst_camerabin_destroy_preview_pipeline (data);
return NULL;
}
/**
* gst_camerabin_destroy_preview_pipeline:
* @preview: the #GstCameraBinPreviewPipelineData
*
* Frees a #GstCameraBinPreviewPipelineData
*/
void
gst_camerabin_destroy_preview_pipeline (GstCameraBinPreviewPipelineData *
preview)
{
if (preview->pipeline) {
gst_element_set_state (preview->pipeline, GST_STATE_NULL);
gst_object_unref (preview->pipeline);
}
g_free (preview);
}
/**
* gst_camerabin_preview_pipeline_post:
* @preview: the #GstCameraBinPreviewPipelineData
* @buffer: the buffer to be posted as a preview
*
* Converts the @buffer to the desired format and posts the preview
* message to the bus.
*
* Returns: %TRUE on success
*/
gboolean
gst_camerabin_preview_pipeline_post (GstCameraBinPreviewPipelineData * preview,
GstBuffer * buffer)
{
g_return_val_if_fail (preview != NULL, FALSE);
g_return_val_if_fail (preview->pipeline != NULL, FALSE);
g_return_val_if_fail (buffer, FALSE);
gst_app_src_push_buffer ((GstAppSrc *) preview->appsrc,
gst_buffer_ref (buffer));
return TRUE;
}
/**
* gst_camerabin_preview_set_caps:
* @preview: the #GstCameraBinPreviewPipelineData
* @caps: the #GstCaps to be set
*
* The caps that preview buffers should have when posted
* on the bus
*/
void
gst_camerabin_preview_set_caps (GstCameraBinPreviewPipelineData * preview,
GstCaps * caps)
{
GstState state, pending;
GstStateChangeReturn ret;
g_return_if_fail (preview != NULL);
ret = gst_element_get_state (preview->pipeline, &state, &pending, 0);
if (ret == GST_STATE_CHANGE_FAILURE) {
/* make it try again */
state = GST_STATE_PLAYING;
pending = GST_STATE_VOID_PENDING;
}
gst_element_set_state (preview->pipeline, GST_STATE_NULL);
g_object_set (preview->capsfilter, "caps", caps, NULL);
if (pending != GST_STATE_VOID_PENDING)
state = pending;
gst_element_set_state (preview->pipeline, state);
}

View file

@ -0,0 +1,44 @@
/*
* GStreamer
* Copyright (C) 2008 Nokia Corporation <multimedia@maemo.org>
* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
*
* 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.
*/
#ifndef __CAMERABIN_PREVIEW_H_
#define __CAMERABIN_PREVIEW_H_
#include <gst/gst.h>
typedef struct
{
GstElement *pipeline;
GstElement *appsrc;
GstElement *filter;
GstElement *capsfilter;
GstElement *appsink;
GstElement *element;
} GstCameraBinPreviewPipelineData;
GstCameraBinPreviewPipelineData *gst_camerabin_create_preview_pipeline (GstElement * element, GstElement * filter);
void gst_camerabin_destroy_preview_pipeline (GstCameraBinPreviewPipelineData * preview);
gboolean gst_camerabin_preview_pipeline_post (GstCameraBinPreviewPipelineData * preview, GstBuffer * buffer);
void gst_camerabin_preview_set_caps (GstCameraBinPreviewPipelineData * preview, GstCaps * caps);
#endif /* #ifndef __CAMERABIN_PREVIEW_H_ */

View file

@ -29,8 +29,6 @@
#include <string.h>
#include <glib.h>
#include <gst/app/gstappsrc.h>
#include <gst/app/gstappsink.h>
#include <gst/basecamerabinsrc/gstbasecamerasrc.h>
#include "camerabingeneral.h"
@ -278,197 +276,3 @@ gst_camerabin_drop_eos_probe (GstPad * pad, GstEvent * event, gpointer u_data)
}
return ret;
}
static GstFlowReturn
gst_camerabin_preview_pipeline_new_preroll (GstAppSink * appsink,
gpointer user_data)
{
GstBuffer *buffer;
buffer = gst_app_sink_pull_preroll (appsink);
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_camerabin_preview_pipeline_new_buffer (GstAppSink * appsink,
gpointer user_data)
{
GstBuffer *buffer;
GstStructure *s;
GstMessage *msg;
GstCameraBinPreviewPipelineData *data;
data = user_data;
buffer = gst_app_sink_pull_buffer (appsink);
s = gst_structure_new (GST_BASE_CAMERA_SRC_PREVIEW_MESSAGE_NAME,
"buffer", GST_TYPE_BUFFER, buffer, NULL);
gst_buffer_unref (buffer);
msg = gst_message_new_element (GST_OBJECT (data->element), s);
GST_DEBUG_OBJECT (data->element, "sending message with preview image");
if (gst_element_post_message (data->element, msg) == FALSE) {
GST_WARNING_OBJECT (data->element,
"This element has no bus, therefore no message sent!");
}
return GST_FLOW_OK;
}
/**
* gst_camerabin_create_preview_pipeline:
* @element: Owner of this pipeline
* @filter: Custom filter to process preview data (an extra ref is taken)
*
* Creates a new previewing pipeline that can receive buffers
* to be posted as camerabin preview messages for @element
*
* Returns: The newly created #GstCameraBinPreviewPipelineData
*/
GstCameraBinPreviewPipelineData *
gst_camerabin_create_preview_pipeline (GstElement * element,
GstElement * filter)
{
GstCameraBinPreviewPipelineData *data;
GstElement *csp;
GstElement *csp2;
GstElement *vscale;
gboolean added = FALSE;
GstAppSinkCallbacks callbacks = { 0, };
data = g_new (GstCameraBinPreviewPipelineData, 1);
data->pipeline = gst_pipeline_new ("preview-pipeline");
data->appsrc = gst_element_factory_make ("appsrc", "preview-appsrc");
data->capsfilter = gst_element_factory_make ("capsfilter",
"preview-capsfilter");
data->appsink = gst_element_factory_make ("appsink", "preview-appsink");
csp = gst_element_factory_make ("ffmpegcolorspace", "preview-csp0");
csp2 = gst_element_factory_make ("ffmpegcolorspace", "preview-csp1");
vscale = gst_element_factory_make ("videoscale", "preview-vscale");
if (!data->appsrc || !data->capsfilter || !data->appsink || !csp ||
!csp2 || !vscale) {
goto error;
}
gst_bin_add_many (GST_BIN (data->pipeline), data->appsrc, data->capsfilter,
data->appsink, csp, csp2, vscale, NULL);
if (filter)
gst_bin_add (GST_BIN (data->pipeline), gst_object_ref (filter));
added = TRUE;
if (filter) {
if (!gst_element_link_many (data->appsrc, filter, csp, vscale, csp2,
data->capsfilter, data->appsink, NULL))
goto error;
} else {
if (!gst_element_link_many (data->appsrc, csp, vscale, csp2,
data->capsfilter, data->appsink, NULL))
goto error;
}
callbacks.new_preroll = gst_camerabin_preview_pipeline_new_preroll;
callbacks.new_buffer = gst_camerabin_preview_pipeline_new_buffer;
gst_app_sink_set_callbacks ((GstAppSink *) data->appsink, &callbacks, data,
NULL);
g_object_set (data->appsink, "sync", FALSE, NULL);
data->element = element;
data->filter = filter;
return data;
error:
GST_WARNING ("Failed to create camerabin's preview pipeline");
if (!added) {
if (csp)
gst_object_unref (csp);
if (csp2)
gst_object_unref (csp2);
if (vscale)
gst_object_unref (vscale);
if (data->appsrc)
gst_object_unref (data->appsrc);
if (data->capsfilter)
gst_object_unref (data->capsfilter);
if (data->appsink)
gst_object_unref (data->appsink);
}
gst_camerabin_destroy_preview_pipeline (data);
return NULL;
}
/**
* gst_camerabin_destroy_preview_pipeline:
* @preview: the #GstCameraBinPreviewPipelineData
*
* Frees a #GstCameraBinPreviewPipelineData
*/
void
gst_camerabin_destroy_preview_pipeline (GstCameraBinPreviewPipelineData *
preview)
{
if (preview->pipeline) {
gst_element_set_state (preview->pipeline, GST_STATE_NULL);
gst_object_unref (preview->pipeline);
}
g_free (preview);
}
/**
* gst_camerabin_preview_pipeline_post:
* @preview: the #GstCameraBinPreviewPipelineData
* @buffer: the buffer to be posted as a preview
*
* Converts the @buffer to the desired format and posts the preview
* message to the bus.
*
* Returns: %TRUE on success
*/
gboolean
gst_camerabin_preview_pipeline_post (GstCameraBinPreviewPipelineData * preview,
GstBuffer * buffer)
{
g_return_val_if_fail (preview != NULL, FALSE);
g_return_val_if_fail (preview->pipeline != NULL, FALSE);
g_return_val_if_fail (buffer, FALSE);
gst_app_src_push_buffer ((GstAppSrc *) preview->appsrc,
gst_buffer_ref (buffer));
return TRUE;
}
/**
* gst_camerabin_preview_set_caps:
* @preview: the #GstCameraBinPreviewPipelineData
* @caps: the #GstCaps to be set
*
* The caps that preview buffers should have when posted
* on the bus
*/
void
gst_camerabin_preview_set_caps (GstCameraBinPreviewPipelineData * preview,
GstCaps * caps)
{
GstState state, pending;
GstStateChangeReturn ret;
g_return_if_fail (preview != NULL);
ret = gst_element_get_state (preview->pipeline, &state, &pending, 0);
if (ret == GST_STATE_CHANGE_FAILURE) {
/* make it try again */
state = GST_STATE_PLAYING;
pending = GST_STATE_VOID_PENDING;
}
gst_element_set_state (preview->pipeline, GST_STATE_NULL);
g_object_set (preview->capsfilter, "caps", caps, NULL);
if (pending != GST_STATE_VOID_PENDING)
state = pending;
gst_element_set_state (preview->pipeline, state);
}

View file

@ -23,23 +23,6 @@
#include <gst/gst.h>
typedef struct
{
GstElement *pipeline;
GstElement *appsrc;
GstElement *filter;
GstElement *capsfilter;
GstElement *appsink;
GstElement *element;
} GstCameraBinPreviewPipelineData;
GstCameraBinPreviewPipelineData *gst_camerabin_create_preview_pipeline (GstElement * element, GstElement * filter);
void gst_camerabin_destroy_preview_pipeline (GstCameraBinPreviewPipelineData * preview);
gboolean gst_camerabin_preview_pipeline_post (GstCameraBinPreviewPipelineData * preview, GstBuffer * buffer);
void gst_camerabin_preview_set_caps (GstCameraBinPreviewPipelineData * preview, GstCaps * caps);
gboolean gst_camerabin_try_add_element (GstBin * bin, const gchar * srcpad, GstElement * new_elem, const gchar * dstpad);
gboolean gst_camerabin_add_element (GstBin * bin, GstElement * new_elem);
gboolean gst_camerabin_add_element_full (GstBin * bin, const gchar * srcpad, GstElement * new_elem, const gchar * dstpad);

View file

@ -25,6 +25,7 @@
#include <gst/gst.h>
#include <gst/basecamerabinsrc/gstbasecamerasrc.h>
#include <gst/basecamerabinsrc/gstcamerabinpreview.h>
#include "camerabingeneral.h"
G_BEGIN_DECLS