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Original commit message from CVS: 2005-07-12 Andy Wingo <wingo@pobox.com> * sys/v4l/gstv4lsrc.c (gst_v4lsrc_get_property) (gst_v4lsrc_set_property, gst_v4lsrc_class_init, gst_v4lsrc_init) (gst_v4lsrc_create): Re-add the copy-mode property, default to TRUE to avoid deadlocks if an element holds on to our buffers.
661 lines
19 KiB
C
661 lines
19 KiB
C
/* GStreamer
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*
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* gstv4lsrc.c: BT8x8/V4L source element
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*
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include <sys/time.h>
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#include "v4lsrc_calls.h"
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#include <sys/ioctl.h>
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static GstElementDetails gst_v4lsrc_details =
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GST_ELEMENT_DETAILS ("Video (video4linux/raw) Source",
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"Source/Video",
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"Reads raw frames from a video4linux (BT8x8) device",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>");
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GST_DEBUG_CATEGORY (v4lsrc_debug);
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#define GST_CAT_DEFAULT v4lsrc_debug
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enum
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{
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PROP_0,
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PROP_AUTOPROBE,
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PROP_AUTOPROBE_FPS,
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PROP_COPY_MODE,
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PROP_TIMESTAMP_OFFSET
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};
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GST_BOILERPLATE (GstV4lSrc, gst_v4lsrc, GstV4lElement, GST_TYPE_V4LELEMENT);
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/* basesrc methods */
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static gboolean gst_v4lsrc_start (GstBaseSrc * src);
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static gboolean gst_v4lsrc_stop (GstBaseSrc * src);
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static gboolean gst_v4lsrc_set_caps (GstBaseSrc * src, GstCaps * caps);
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static GstCaps *gst_v4lsrc_get_caps (GstBaseSrc * src);
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static GstFlowReturn gst_v4lsrc_create (GstPushSrc * src, GstBuffer ** out);
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static void gst_v4lsrc_fixate (GstPad * pad, GstCaps * caps);
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static void gst_v4lsrc_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_v4lsrc_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void
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gst_v4lsrc_base_init (gpointer g_class)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details (gstelement_class, &gst_v4lsrc_details);
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gst_element_class_add_pad_template (gstelement_class,
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gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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gst_caps_new_any ()));
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}
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static void
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gst_v4lsrc_class_init (GstV4lSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstBaseSrcClass *basesrc_class;
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GstPushSrcClass *pushsrc_class;
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gobject_class = (GObjectClass *) klass;
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basesrc_class = (GstBaseSrcClass *) klass;
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pushsrc_class = (GstPushSrcClass *) klass;
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gobject_class->set_property = gst_v4lsrc_set_property;
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gobject_class->get_property = gst_v4lsrc_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_AUTOPROBE,
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g_param_spec_boolean ("autoprobe", "Autoprobe",
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"Whether the device should be probed for all possible features",
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TRUE, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_AUTOPROBE_FPS,
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g_param_spec_boolean ("autoprobe-fps", "Autoprobe FPS",
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"Whether the device should be probed for framerates",
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TRUE, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COPY_MODE,
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g_param_spec_boolean ("copy-mode", "Copy mode",
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"Whether to send out copies of buffers, or direct pointers to the mmap region",
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TRUE, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_TIMESTAMP_OFFSET, g_param_spec_int64 ("timestamp-offset",
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"Timestamp offset",
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"A time offset subtracted from timestamps set on buffers (in ns)",
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G_MININT64, G_MAXINT64, 0, G_PARAM_READWRITE));
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GST_DEBUG_CATEGORY_INIT (v4lsrc_debug, "v4lsrc", 0, "V4L source element");
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basesrc_class->get_caps = gst_v4lsrc_get_caps;
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basesrc_class->set_caps = gst_v4lsrc_set_caps;
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basesrc_class->start = gst_v4lsrc_start;
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basesrc_class->stop = gst_v4lsrc_stop;
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pushsrc_class->create = gst_v4lsrc_create;
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}
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static void
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gst_v4lsrc_init (GstV4lSrc * v4lsrc)
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{
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v4lsrc->buffer_size = 0;
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/* no colorspaces */
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v4lsrc->colorspaces = NULL;
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v4lsrc->is_capturing = FALSE;
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v4lsrc->autoprobe = TRUE;
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v4lsrc->autoprobe_fps = TRUE;
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v4lsrc->copy_mode = TRUE;
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v4lsrc->timestamp_offset = 0;
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v4lsrc->fps_list = NULL;
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gst_pad_set_fixatecaps_function (GST_BASE_SRC_PAD (v4lsrc),
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gst_v4lsrc_fixate);
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gst_base_src_set_live (GST_BASE_SRC (v4lsrc), TRUE);
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}
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static void
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gst_v4lsrc_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstV4lSrc *v4lsrc = GST_V4LSRC (object);
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switch (prop_id) {
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case PROP_AUTOPROBE:
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g_return_if_fail (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lsrc)));
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v4lsrc->autoprobe = g_value_get_boolean (value);
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break;
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case PROP_AUTOPROBE_FPS:
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g_return_if_fail (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lsrc)));
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v4lsrc->autoprobe_fps = g_value_get_boolean (value);
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break;
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case PROP_COPY_MODE:
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v4lsrc->copy_mode = g_value_get_boolean (value);
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break;
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case PROP_TIMESTAMP_OFFSET:
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v4lsrc->timestamp_offset = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_v4lsrc_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstV4lSrc *v4lsrc = GST_V4LSRC (object);
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switch (prop_id) {
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case PROP_AUTOPROBE:
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g_value_set_boolean (value, v4lsrc->autoprobe);
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break;
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case PROP_AUTOPROBE_FPS:
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g_value_set_boolean (value, v4lsrc->autoprobe_fps);
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break;
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case PROP_COPY_MODE:
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g_value_set_boolean (value, v4lsrc->copy_mode);
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break;
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case PROP_TIMESTAMP_OFFSET:
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g_value_set_int (value, v4lsrc->timestamp_offset);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/* this function is a bit of a last resort */
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static void
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gst_v4lsrc_fixate (GstPad * pad, GstCaps * caps)
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{
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GstStructure *structure;
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int i;
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int targetwidth, targetheight;
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GstV4lSrc *v4lsrc = GST_V4LSRC (gst_pad_get_parent (pad));
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struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
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struct video_window *vwin = &GST_V4LELEMENT (v4lsrc)->vwin;
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if (GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lsrc))) {
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GST_DEBUG_OBJECT (v4lsrc, "device reported w: %d-%d, h: %d-%d",
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vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight);
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targetwidth = vcap->minwidth;
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targetheight = vcap->minheight;
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/* if we can get the current vwin settings, we use those to fixate */
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if (!gst_v4l_get_capabilities (GST_V4LELEMENT (v4lsrc)))
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GST_DEBUG_OBJECT (v4lsrc, "failed getting capabilities");
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else {
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targetwidth = vwin->width;
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targetheight = vwin->height;
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}
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} else {
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GST_DEBUG_OBJECT (v4lsrc, "device closed, guessing");
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targetwidth = 320;
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targetheight = 200;
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}
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GST_DEBUG_OBJECT (v4lsrc, "targetting %dx%d", targetwidth, targetheight);
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for (i = 0; i < gst_caps_get_size (caps); ++i) {
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structure = gst_caps_get_structure (caps, i);
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gst_caps_structure_fixate_field_nearest_int (structure, "width",
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targetwidth);
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gst_caps_structure_fixate_field_nearest_int (structure, "height",
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targetheight);
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gst_caps_structure_fixate_field_nearest_double (structure, "framerate",
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7.5);
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}
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}
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static gint all_palettes[] = {
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VIDEO_PALETTE_YUV422,
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VIDEO_PALETTE_YUV420P,
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VIDEO_PALETTE_UYVY,
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VIDEO_PALETTE_YUV411P,
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VIDEO_PALETTE_YUV422P,
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VIDEO_PALETTE_YUV410P,
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VIDEO_PALETTE_YUV411,
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VIDEO_PALETTE_RGB555,
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VIDEO_PALETTE_RGB565,
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VIDEO_PALETTE_RGB24,
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VIDEO_PALETTE_RGB32,
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-1
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};
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static GstCaps *
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gst_v4lsrc_palette_to_caps (int palette)
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{
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guint32 fourcc;
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GstCaps *caps;
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switch (palette) {
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case VIDEO_PALETTE_YUV422:
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case VIDEO_PALETTE_YUYV:
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fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
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break;
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case VIDEO_PALETTE_YUV420P:
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fourcc = GST_MAKE_FOURCC ('I', '4', '2', '0');
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break;
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case VIDEO_PALETTE_UYVY:
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fourcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
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break;
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case VIDEO_PALETTE_YUV411P:
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fourcc = GST_MAKE_FOURCC ('Y', '4', '1', 'B');
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break;
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case VIDEO_PALETTE_YUV411:
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fourcc = GST_MAKE_FOURCC ('Y', '4', '1', 'P');
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break;
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case VIDEO_PALETTE_YUV422P:
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fourcc = GST_MAKE_FOURCC ('Y', '4', '2', 'B');
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break;
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case VIDEO_PALETTE_YUV410P:
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fourcc = GST_MAKE_FOURCC ('Y', 'U', 'V', '9');
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break;
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case VIDEO_PALETTE_RGB555:
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case VIDEO_PALETTE_RGB565:
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case VIDEO_PALETTE_RGB24:
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case VIDEO_PALETTE_RGB32:
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fourcc = GST_MAKE_FOURCC ('R', 'G', 'B', ' ');
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break;
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default:
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return NULL;
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}
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if (fourcc == GST_MAKE_FOURCC ('R', 'G', 'B', ' ')) {
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switch (palette) {
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case VIDEO_PALETTE_RGB555:
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caps = gst_caps_from_string ("video/x-raw-rgb, "
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"bpp = (int) 16, "
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"depth = (int) 15, "
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"endianness = (int) BYTE_ORDER, "
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"red_mask = 0x7c00, " "green_mask = 0x03e0, " "blue_mask = 0x001f");
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break;
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case VIDEO_PALETTE_RGB565:
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caps = gst_caps_from_string ("video/x-raw-rgb, "
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"bpp = (int) 16, "
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"depth = (int) 16, "
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"endianness = (int) BYTE_ORDER, "
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"red_mask = 0xf800, " "green_mask = 0x07f0, " "blue_mask = 0x001f");
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break;
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case VIDEO_PALETTE_RGB24:
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caps = gst_caps_from_string ("video/x-raw-rgb, "
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"bpp = (int) 24, "
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"depth = (int) 24, "
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"endianness = (int) BIG_ENDIAN, "
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"red_mask = 0x0000FF, "
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"green_mask = 0x00FF00, " "blue_mask = 0xFF0000");
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break;
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case VIDEO_PALETTE_RGB32:
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caps = gst_caps_from_string ("video/x-raw-rgb, "
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"bpp = (int) 32, "
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"depth = (int) 24, "
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"endianness = (int) BIG_ENDIAN, "
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"red_mask = 0xFF000000, "
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"green_mask = 0x00FF0000, " "blue_mask = 0x0000FF00");
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break;
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default:
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g_assert_not_reached ();
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return NULL;
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}
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} else {
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caps = gst_caps_new_simple ("video/x-raw-yuv",
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"format", GST_TYPE_FOURCC, fourcc, NULL);
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}
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return caps;
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}
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static GstCaps *
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gst_v4lsrc_get_any_caps ()
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{
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gint i;
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GstCaps *caps = gst_caps_new_empty (), *one;
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for (i = 0; all_palettes[i] != -1; i++) {
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one = gst_v4lsrc_palette_to_caps (all_palettes[i]);
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gst_caps_append (caps, one);
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}
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return caps;
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}
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static GstCaps *
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gst_v4lsrc_get_caps (GstBaseSrc * src)
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{
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GstCaps *list;
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GstV4lSrc *v4lsrc = GST_V4LSRC (src);
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struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
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gint width = GST_V4LELEMENT (src)->vcap.minwidth;
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gint height = GST_V4LELEMENT (src)->vcap.minheight;
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gint i;
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gdouble fps;
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GList *item;
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if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lsrc))) {
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return gst_v4lsrc_get_any_caps ();
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}
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if (!v4lsrc->autoprobe) {
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/* FIXME: query current caps and return those, with _any appended */
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return gst_v4lsrc_get_any_caps ();
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}
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if (!v4lsrc->colorspaces) {
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GST_DEBUG_OBJECT (v4lsrc, "Checking supported palettes");
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for (i = 0; all_palettes[i] != -1; i++) {
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/* try palette out */
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if (!gst_v4lsrc_try_capture (v4lsrc, width, height, all_palettes[i]))
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continue;
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GST_DEBUG_OBJECT (v4lsrc, "Added palette %d (%s) to supported list",
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all_palettes[i], gst_v4lsrc_palette_name (all_palettes[i]));
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v4lsrc->colorspaces = g_list_append (v4lsrc->colorspaces,
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GINT_TO_POINTER (all_palettes[i]));
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}
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GST_DEBUG_OBJECT (v4lsrc, "%d palette(s) supported",
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g_list_length (v4lsrc->colorspaces));
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if (v4lsrc->autoprobe_fps) {
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GST_DEBUG_OBJECT (v4lsrc, "autoprobing framerates");
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v4lsrc->fps_list = gst_v4lsrc_get_fps_list (v4lsrc);
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}
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}
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fps = gst_v4lsrc_get_fps (v4lsrc);
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list = gst_caps_new_empty ();
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for (item = v4lsrc->colorspaces; item != NULL; item = item->next) {
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GstCaps *one;
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one = gst_v4lsrc_palette_to_caps (GPOINTER_TO_INT (item->data));
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if (!one) {
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GST_WARNING_OBJECT (v4lsrc, "Palette %d gave no caps\n",
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GPOINTER_TO_INT (item->data));
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continue;
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}
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GST_DEBUG_OBJECT (v4lsrc,
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"Device reports w: %d-%d, h: %d-%d, fps: %f for palette %d",
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vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight, fps,
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GPOINTER_TO_INT (item->data));
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if (vcap->minwidth < vcap->maxwidth) {
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gst_caps_set_simple (one, "width", GST_TYPE_INT_RANGE, vcap->minwidth,
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vcap->maxwidth, NULL);
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} else {
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gst_caps_set_simple (one, "width", G_TYPE_INT, vcap->minwidth, NULL);
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}
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if (vcap->minheight < vcap->maxheight) {
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gst_caps_set_simple (one, "height", GST_TYPE_INT_RANGE, vcap->minheight,
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vcap->maxheight, NULL);
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} else {
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gst_caps_set_simple (one, "height", G_TYPE_INT, vcap->minheight, NULL);
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}
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if (v4lsrc->autoprobe_fps) {
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if (v4lsrc->fps_list) {
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GstStructure *structure = gst_caps_get_structure (one, 0);
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gst_structure_set_value (structure, "framerate", v4lsrc->fps_list);
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} else {
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gst_caps_set_simple (one, "framerate", G_TYPE_DOUBLE, fps, NULL);
|
|
}
|
|
} else {
|
|
gst_caps_set_simple (one, "framerate", GST_TYPE_DOUBLE_RANGE,
|
|
(gdouble) 1.0, (gdouble) 100.0, NULL);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (v4lsrc, "caps: %" GST_PTR_FORMAT, one);
|
|
gst_caps_append (list, one);
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4lsrc_set_caps (GstBaseSrc * src, GstCaps * caps)
|
|
{
|
|
GstV4lSrc *v4lsrc;
|
|
guint32 fourcc;
|
|
gint bpp, depth, w, h, palette = -1;
|
|
gdouble fps;
|
|
GstStructure *structure;
|
|
struct video_window *vwin;
|
|
|
|
v4lsrc = GST_V4LSRC (src);
|
|
vwin = &GST_V4LELEMENT (v4lsrc)->vwin;
|
|
|
|
/* if we're not open, punt -- we'll get setcaps'd later via negotiate */
|
|
if (!GST_V4L_IS_OPEN (v4lsrc))
|
|
return FALSE;
|
|
|
|
/* make sure we stop capturing and dealloc buffers */
|
|
if (GST_V4L_IS_ACTIVE (v4lsrc)) {
|
|
if (!gst_v4lsrc_capture_stop (v4lsrc))
|
|
return FALSE;
|
|
if (!gst_v4lsrc_capture_deinit (v4lsrc))
|
|
return FALSE;
|
|
}
|
|
|
|
/* it's fixed, one struct */
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
|
|
if (strcmp (gst_structure_get_name (structure), "video/x-raw-yuv") == 0)
|
|
gst_structure_get_fourcc (structure, "format", &fourcc);
|
|
else
|
|
fourcc = GST_MAKE_FOURCC ('R', 'G', 'B', ' ');
|
|
|
|
gst_structure_get_int (structure, "width", &w);
|
|
gst_structure_get_int (structure, "height", &h);
|
|
gst_structure_get_double (structure, "framerate", &fps);
|
|
GST_DEBUG_OBJECT (v4lsrc, "linking with %dx%d at %f fps", w, h, fps);
|
|
|
|
/* set framerate if it's not already correct */
|
|
if (fps != gst_v4lsrc_get_fps (v4lsrc)) {
|
|
int fps_index = fps / 15.0 * 16;
|
|
|
|
GST_DEBUG_OBJECT (v4lsrc, "Trying to set fps index %d", fps_index);
|
|
/* set bits 16 to 21 to 0 */
|
|
vwin->flags &= (0x3F00 - 1);
|
|
/* set bits 16 to 21 to the index */
|
|
vwin->flags |= fps_index << 16;
|
|
if (!gst_v4l_set_window_properties (GST_V4LELEMENT (v4lsrc))) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
switch (fourcc) {
|
|
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
|
|
palette = VIDEO_PALETTE_YUV420P;
|
|
v4lsrc->buffer_size = ((w + 1) & ~1) * ((h + 1) & ~1) * 1.5;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
|
|
palette = VIDEO_PALETTE_YUV422;
|
|
v4lsrc->buffer_size = ((w + 1) & ~1) * h * 2;
|
|
break;
|
|
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
|
|
palette = VIDEO_PALETTE_UYVY;
|
|
v4lsrc->buffer_size = ((w + 1) & ~1) * h * 2;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', '4', '1', 'B'):
|
|
palette = VIDEO_PALETTE_YUV411P;
|
|
v4lsrc->buffer_size = ((w + 3) & ~3) * h * 1.5;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', '4', '1', 'P'):
|
|
palette = VIDEO_PALETTE_YUV411;
|
|
v4lsrc->buffer_size = ((w + 3) & ~3) * h * 1.5;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', 'U', 'V', '9'):
|
|
palette = VIDEO_PALETTE_YUV410P;
|
|
v4lsrc->buffer_size = ((w + 3) & ~3) * ((h + 3) & ~3) * 1.125;
|
|
break;
|
|
case GST_MAKE_FOURCC ('Y', '4', '2', 'B'):
|
|
palette = VIDEO_PALETTE_YUV422P;
|
|
v4lsrc->buffer_size = ((w + 1) & ~1) * h * 2;
|
|
break;
|
|
case GST_MAKE_FOURCC ('R', 'G', 'B', ' '):
|
|
gst_structure_get_int (structure, "depth", &depth);
|
|
switch (depth) {
|
|
case 15:
|
|
palette = VIDEO_PALETTE_RGB555;
|
|
v4lsrc->buffer_size = w * h * 2;
|
|
break;
|
|
case 16:
|
|
palette = VIDEO_PALETTE_RGB565;
|
|
v4lsrc->buffer_size = w * h * 2;
|
|
break;
|
|
case 24:
|
|
gst_structure_get_int (structure, "bpp", &bpp);
|
|
switch (bpp) {
|
|
case 24:
|
|
palette = VIDEO_PALETTE_RGB24;
|
|
v4lsrc->buffer_size = w * h * 3;
|
|
break;
|
|
case 32:
|
|
palette = VIDEO_PALETTE_RGB32;
|
|
v4lsrc->buffer_size = w * h * 4;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (palette == -1) {
|
|
GST_WARNING_OBJECT (v4lsrc, "palette for fourcc " GST_FOURCC_FORMAT
|
|
" is -1, refusing link", GST_FOURCC_ARGS (fourcc));
|
|
return FALSE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (v4lsrc, "trying to set_capture %dx%d, palette %d",
|
|
w, h, palette);
|
|
/* this only fills in v4lsrc->mmap values */
|
|
if (!gst_v4lsrc_set_capture (v4lsrc, w, h, palette)) {
|
|
GST_WARNING_OBJECT (v4lsrc, "could not set_capture %dx%d, palette %d",
|
|
w, h, palette);
|
|
return FALSE;
|
|
}
|
|
|
|
/* first try the negotiated settings using try_capture */
|
|
if (!gst_v4lsrc_try_capture (v4lsrc, w, h, palette)) {
|
|
GST_DEBUG_OBJECT (v4lsrc, "failed trying palette %d for %dx%d", palette,
|
|
w, h);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_v4lsrc_capture_init (v4lsrc))
|
|
return FALSE;
|
|
|
|
if (!gst_v4lsrc_capture_start (v4lsrc))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* start and stop are not symmetric -- start will open the device, but not start
|
|
capture. it's setcaps that will start capture, which is called via basesrc's
|
|
negotiate method. stop will both stop capture and close the device.
|
|
*/
|
|
static gboolean
|
|
gst_v4lsrc_start (GstBaseSrc * src)
|
|
{
|
|
GstV4lSrc *v4lsrc = GST_V4LSRC (src);
|
|
|
|
if (!GST_BASE_SRC_CLASS (parent_class)->start (src))
|
|
return FALSE;
|
|
|
|
v4lsrc->offset = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4lsrc_stop (GstBaseSrc * src)
|
|
{
|
|
GstV4lSrc *v4lsrc = GST_V4LSRC (src);
|
|
|
|
if (!gst_v4lsrc_capture_stop (v4lsrc))
|
|
return FALSE;
|
|
|
|
if (GST_V4LELEMENT (v4lsrc)->buffer != NULL) {
|
|
if (!gst_v4lsrc_capture_deinit (v4lsrc))
|
|
return FALSE;
|
|
}
|
|
|
|
if (!GST_BASE_SRC_CLASS (parent_class)->stop (src))
|
|
return FALSE;
|
|
|
|
g_list_free (v4lsrc->colorspaces);
|
|
v4lsrc->colorspaces = NULL;
|
|
|
|
if (v4lsrc->fps_list) {
|
|
g_value_unset (v4lsrc->fps_list);
|
|
g_free (v4lsrc->fps_list);
|
|
v4lsrc->fps_list = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4lsrc_create (GstPushSrc * src, GstBuffer ** buf)
|
|
{
|
|
GstV4lSrc *v4lsrc;
|
|
gint num;
|
|
|
|
v4lsrc = GST_V4LSRC (src);
|
|
|
|
/* grab a frame from the device */
|
|
if (!gst_v4lsrc_grab_frame (v4lsrc, &num))
|
|
return GST_FLOW_ERROR;
|
|
|
|
*buf = gst_v4lsrc_buffer_new (v4lsrc, num);
|
|
|
|
if (v4lsrc->copy_mode) {
|
|
GstBuffer *copy = gst_buffer_copy (*buf);
|
|
|
|
gst_buffer_unref (*buf);
|
|
*buf = copy;
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|