mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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791 lines
24 KiB
C
791 lines
24 KiB
C
/* G-Streamer hardware MJPEG video source plugin
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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 "v4lmjpegsrc_calls.h"
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/* elementfactory information */
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static GstElementDetails gst_v4lmjpegsrc_details = {
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"Video (video4linux/MJPEG) Source",
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"Source/Video",
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"Reads MJPEG-encoded frames from a zoran MJPEG/video4linux device",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>"
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};
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/* V4lMjpegSrc signals and args */
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enum
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{
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SIGNAL_FRAME_CAPTURE,
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SIGNAL_FRAME_DROP,
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SIGNAL_FRAME_INSERT,
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SIGNAL_FRAME_LOST,
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LAST_SIGNAL
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};
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/* arguments */
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enum
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{
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ARG_0,
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#if 0
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ARG_X_OFFSET,
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ARG_Y_OFFSET,
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ARG_F_WIDTH,
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ARG_F_HEIGHT,
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/* normally, we would want to use subframe capture, however,
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* for the time being it's easier if we disable it first */
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#endif
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ARG_QUALITY,
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ARG_NUMBUFS,
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ARG_BUFSIZE,
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ARG_USE_FIXED_FPS
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};
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GST_FORMATS_FUNCTION (GstPad *, gst_v4lmjpegsrc_get_formats,
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GST_FORMAT_TIME, GST_FORMAT_DEFAULT);
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GST_QUERY_TYPE_FUNCTION (GstPad *, gst_v4lmjpegsrc_get_query_types,
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GST_QUERY_POSITION);
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/* init functions */
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static void gst_v4lmjpegsrc_base_init (gpointer g_class);
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static void gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass * klass);
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static void gst_v4lmjpegsrc_init (GstV4lMjpegSrc * v4lmjpegsrc);
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/* pad/info functions */
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static gboolean gst_v4lmjpegsrc_src_convert (GstPad * pad,
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GstFormat src_format,
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gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
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static gboolean gst_v4lmjpegsrc_src_query (GstPad * pad,
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GstQueryType type, GstFormat * format, gint64 * value);
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/* buffer functions */
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static GstPadLinkReturn gst_v4lmjpegsrc_srcconnect (GstPad * pad,
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const GstCaps * caps);
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static GstData *gst_v4lmjpegsrc_get (GstPad * pad);
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static GstCaps *gst_v4lmjpegsrc_getcaps (GstPad * pad);
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/* get/set params */
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static void gst_v4lmjpegsrc_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_v4lmjpegsrc_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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/* set_clock function for A/V sync */
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static void gst_v4lmjpegsrc_set_clock (GstElement * element, GstClock * clock);
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/* state handling */
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static GstElementStateReturn gst_v4lmjpegsrc_change_state (GstElement *
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element);
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/* requeue buffer after use */
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static void gst_v4lmjpegsrc_buffer_free (GstBuffer * buffer);
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static GstElementClass *parent_class = NULL;
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static guint gst_v4lmjpegsrc_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_v4lmjpegsrc_get_type (void)
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{
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static GType v4lmjpegsrc_type = 0;
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if (!v4lmjpegsrc_type) {
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static const GTypeInfo v4lmjpegsrc_info = {
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sizeof (GstV4lMjpegSrcClass),
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gst_v4lmjpegsrc_base_init,
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NULL,
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(GClassInitFunc) gst_v4lmjpegsrc_class_init,
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NULL,
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NULL,
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sizeof (GstV4lMjpegSrc),
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0,
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(GInstanceInitFunc) gst_v4lmjpegsrc_init,
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NULL
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};
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v4lmjpegsrc_type =
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g_type_register_static (GST_TYPE_V4LELEMENT, "GstV4lMjpegSrc",
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&v4lmjpegsrc_info, 0);
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}
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return v4lmjpegsrc_type;
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}
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static void
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gst_v4lmjpegsrc_base_init (gpointer g_class)
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{
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-jpeg, "
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"width = (int) [ 0, MAX ], "
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"height = (int) [ 0, MAX ], " "framerate = (double) [ 0, MAX ]")
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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_v4lmjpegsrc_details);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_template));
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}
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static void
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gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_V4LELEMENT);
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#if 0
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_X_OFFSET,
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g_param_spec_int ("x_offset", "x_offset", "x_offset",
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G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_Y_OFFSET,
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g_param_spec_int ("y_offset", "y_offset", "y_offset",
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G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_F_WIDTH,
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g_param_spec_int ("frame_width", "frame_width", "frame_width",
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G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_F_HEIGHT,
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g_param_spec_int ("frame_height", "frame_height", "frame_height",
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G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE));
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#endif
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
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g_param_spec_int ("quality", "Quality", "JPEG frame quality",
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1, 100, 50, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUMBUFS,
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g_param_spec_int ("num_buffers", "Num Buffers", "Number of Buffers",
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1, 256, 64, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFSIZE,
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g_param_spec_int ("buffer_size", "Buffer Size", "Size of buffers",
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0, 512 * 1024, 128 * 1024, G_PARAM_READABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_USE_FIXED_FPS,
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g_param_spec_boolean ("use_fixed_fps", "Use Fixed FPS",
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"Drop/Insert frames to reach a certain FPS (TRUE) "
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"or adapt FPS to suit the number of grabbed frames",
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TRUE, G_PARAM_READWRITE));
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/* signals */
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gst_v4lmjpegsrc_signals[SIGNAL_FRAME_CAPTURE] =
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g_signal_new ("frame-capture", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_capture),
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NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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gst_v4lmjpegsrc_signals[SIGNAL_FRAME_DROP] =
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g_signal_new ("frame-drop", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_drop), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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gst_v4lmjpegsrc_signals[SIGNAL_FRAME_INSERT] =
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g_signal_new ("frame-insert", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_insert),
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NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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gst_v4lmjpegsrc_signals[SIGNAL_FRAME_LOST] =
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g_signal_new ("frame-lost", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_lost), NULL, NULL,
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g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
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gobject_class->set_property = gst_v4lmjpegsrc_set_property;
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gobject_class->get_property = gst_v4lmjpegsrc_get_property;
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gstelement_class->change_state = gst_v4lmjpegsrc_change_state;
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gstelement_class->set_clock = gst_v4lmjpegsrc_set_clock;
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}
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static void
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gst_v4lmjpegsrc_init (GstV4lMjpegSrc * v4lmjpegsrc)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (v4lmjpegsrc);
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GST_FLAG_SET (GST_ELEMENT (v4lmjpegsrc), GST_ELEMENT_THREAD_SUGGESTED);
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v4lmjpegsrc->srcpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"src"), "src");
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gst_element_add_pad (GST_ELEMENT (v4lmjpegsrc), v4lmjpegsrc->srcpad);
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gst_pad_set_get_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_get);
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gst_pad_set_getcaps_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_getcaps);
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gst_pad_set_link_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_srcconnect);
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gst_pad_set_convert_function (v4lmjpegsrc->srcpad,
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gst_v4lmjpegsrc_src_convert);
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gst_pad_set_formats_function (v4lmjpegsrc->srcpad,
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gst_v4lmjpegsrc_get_formats);
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gst_pad_set_query_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_src_query);
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gst_pad_set_query_type_function (v4lmjpegsrc->srcpad,
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gst_v4lmjpegsrc_get_query_types);
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#if 0
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v4lmjpegsrc->frame_width = 0;
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v4lmjpegsrc->frame_height = 0;
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v4lmjpegsrc->x_offset = -1;
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v4lmjpegsrc->y_offset = -1;
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#endif
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v4lmjpegsrc->quality = 50;
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v4lmjpegsrc->numbufs = 64;
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/* no clock */
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v4lmjpegsrc->clock = NULL;
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/* fps */
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v4lmjpegsrc->use_fixed_fps = TRUE;
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}
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static gfloat
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gst_v4lmjpegsrc_get_fps (GstV4lMjpegSrc * v4lmjpegsrc)
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{
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gint norm;
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gfloat fps;
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if (!v4lmjpegsrc->use_fixed_fps &&
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v4lmjpegsrc->clock != NULL && v4lmjpegsrc->handled > 0) {
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/* try to get time from clock master and calculate fps */
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GstClockTime time =
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gst_clock_get_time (v4lmjpegsrc->clock) - v4lmjpegsrc->substract_time;
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return v4lmjpegsrc->handled * GST_SECOND / time;
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}
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/* if that failed ... */
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if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lmjpegsrc)))
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return 0.;
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if (!gst_v4l_get_chan_norm (GST_V4LELEMENT (v4lmjpegsrc), NULL, &norm))
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return 0.;
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if (norm == VIDEO_MODE_NTSC)
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fps = 30000 / 1001;
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else
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fps = 25.;
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return fps;
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}
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static gboolean
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gst_v4lmjpegsrc_src_convert (GstPad * pad,
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GstFormat src_format,
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gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
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{
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GstV4lMjpegSrc *v4lmjpegsrc;
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gdouble fps;
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v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
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if ((fps = gst_v4lmjpegsrc_get_fps (v4lmjpegsrc)) == 0)
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return FALSE;
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switch (src_format) {
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case GST_FORMAT_TIME:
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switch (*dest_format) {
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case GST_FORMAT_DEFAULT:
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*dest_value = src_value * fps / GST_SECOND;
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break;
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default:
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return FALSE;
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}
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break;
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case GST_FORMAT_DEFAULT:
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switch (*dest_format) {
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case GST_FORMAT_TIME:
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*dest_value = src_value * GST_SECOND / fps;
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break;
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default:
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return FALSE;
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}
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break;
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default:
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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gst_v4lmjpegsrc_src_query (GstPad * pad,
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GstQueryType type, GstFormat * format, gint64 * value)
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{
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GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
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gboolean res = TRUE;
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gdouble fps;
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if ((fps = gst_v4lmjpegsrc_get_fps (v4lmjpegsrc)) == 0)
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return FALSE;
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switch (type) {
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case GST_QUERY_POSITION:
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switch (*format) {
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case GST_FORMAT_TIME:
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*value = v4lmjpegsrc->handled * GST_SECOND / fps;
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break;
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case GST_FORMAT_DEFAULT:
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*value = v4lmjpegsrc->handled;
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break;
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default:
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res = FALSE;
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break;
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}
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break;
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default:
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res = FALSE;
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break;
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}
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return res;
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}
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static inline gulong
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calc_bufsize (int hor_dec, int ver_dec)
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{
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guint8 div = hor_dec * ver_dec;
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guint32 num = (1024 * 512) / (div);
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guint32 result = 2;
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num--;
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while (num) {
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num >>= 1;
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result <<= 1;
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}
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if (result > (512 * 1024))
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return (512 * 1024);
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if (result < 8192)
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return 8192;
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return result;
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}
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static GstPadLinkReturn
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gst_v4lmjpegsrc_srcconnect (GstPad * pad, const GstCaps * caps)
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{
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GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
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gint hor_dec, ver_dec;
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gint w, h;
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gint max_w = GST_V4LELEMENT (v4lmjpegsrc)->vcap.maxwidth,
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max_h = GST_V4LELEMENT (v4lmjpegsrc)->vcap.maxheight;
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gulong bufsize;
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GstStructure *structure;
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/* in case the buffers are active (which means that we already
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* did capsnego before and didn't clean up), clean up anyways */
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if (GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc))) {
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if (!gst_v4lmjpegsrc_capture_deinit (v4lmjpegsrc))
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return GST_PAD_LINK_REFUSED;
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} else if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lmjpegsrc))) {
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return GST_PAD_LINK_DELAYED;
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}
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/* Note: basically, we don't give a damn about the opposite caps here.
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* that might seem odd, but it isn't. we know that the opposite caps is
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* either NULL or has mime type video/x-jpeg, and in both cases, we'll set
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* our own mime type back and it'll work. Other properties are to be set
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* by the src, not by the opposite caps */
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structure = gst_caps_get_structure (caps, 0);
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gst_structure_get_int (structure, "width", &w);
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gst_structure_get_int (structure, "height", &h);
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/* figure out decimation */
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if (w >= max_w) {
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hor_dec = 1;
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} else if (w * 2 >= max_w) {
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hor_dec = 2;
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} else {
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hor_dec = 4;
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}
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if (h >= max_h) {
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ver_dec = 1;
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} else if (h * 2 >= max_h) {
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ver_dec = 2;
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} else {
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ver_dec = 4;
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}
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/* calculate bufsize */
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bufsize = calc_bufsize (hor_dec, ver_dec);
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/* set buffer info */
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if (!gst_v4lmjpegsrc_set_buffer (v4lmjpegsrc, v4lmjpegsrc->numbufs, bufsize)) {
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return GST_PAD_LINK_REFUSED;
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}
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/* set capture parameters and mmap the buffers */
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if (hor_dec == ver_dec) {
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if (!gst_v4lmjpegsrc_set_capture (v4lmjpegsrc,
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hor_dec, v4lmjpegsrc->quality)) {
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return GST_PAD_LINK_REFUSED;
|
|
}
|
|
} else {
|
|
if (!gst_v4lmjpegsrc_set_capture_m (v4lmjpegsrc,
|
|
0, 0, max_w, max_h, hor_dec, ver_dec, v4lmjpegsrc->quality)) {
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
}
|
|
#if 0
|
|
if (!v4lmjpegsrc->frame_width && !v4lmjpegsrc->frame_height &&
|
|
v4lmjpegsrc->x_offset < 0 && v4lmjpegsrc->y_offset < 0 &&
|
|
v4lmjpegsrc->horizontal_decimation == v4lmjpegsrc->vertical_decimation) {
|
|
if (!gst_v4lmjpegsrc_set_capture (v4lmjpegsrc,
|
|
v4lmjpegsrc->horizontal_decimation, v4lmjpegsrc->quality))
|
|
return GST_PAD_LINK_REFUSED;
|
|
} else {
|
|
if (!gst_v4lmjpegsrc_set_capture_m (v4lmjpegsrc,
|
|
v4lmjpegsrc->x_offset, v4lmjpegsrc->y_offset,
|
|
v4lmjpegsrc->frame_width, v4lmjpegsrc->frame_height,
|
|
v4lmjpegsrc->horizontal_decimation,
|
|
v4lmjpegsrc->vertical_decimation, v4lmjpegsrc->quality))
|
|
return GST_PAD_LINK_REFUSED;
|
|
}
|
|
#endif
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
|
|
static GstData *
|
|
gst_v4lmjpegsrc_get (GstPad * pad)
|
|
{
|
|
GstV4lMjpegSrc *v4lmjpegsrc;
|
|
GstBuffer *buf;
|
|
gint num;
|
|
gdouble fps = 0;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
|
|
v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
|
|
|
|
if (v4lmjpegsrc->use_fixed_fps &&
|
|
(fps = gst_v4lmjpegsrc_get_fps (v4lmjpegsrc)) == 0)
|
|
return NULL;
|
|
|
|
if (v4lmjpegsrc->need_writes > 0) {
|
|
/* use last frame */
|
|
num = v4lmjpegsrc->last_frame;
|
|
v4lmjpegsrc->need_writes--;
|
|
} else if (v4lmjpegsrc->clock && v4lmjpegsrc->use_fixed_fps) {
|
|
GstClockTime time;
|
|
gboolean have_frame = FALSE;
|
|
|
|
do {
|
|
/* by default, we use the frame once */
|
|
v4lmjpegsrc->need_writes = 1;
|
|
|
|
/* grab a frame from the device */
|
|
if (!gst_v4lmjpegsrc_grab_frame (v4lmjpegsrc, &num,
|
|
&v4lmjpegsrc->last_size))
|
|
return NULL;
|
|
|
|
v4lmjpegsrc->last_frame = num;
|
|
time = GST_TIMEVAL_TO_TIME (v4lmjpegsrc->bsync.timestamp) -
|
|
v4lmjpegsrc->substract_time;
|
|
|
|
/* first check whether we lost any frames according to the device */
|
|
if (v4lmjpegsrc->last_seq != 0) {
|
|
if (v4lmjpegsrc->bsync.seq - v4lmjpegsrc->last_seq > 1) {
|
|
v4lmjpegsrc->need_writes =
|
|
v4lmjpegsrc->bsync.seq - v4lmjpegsrc->last_seq;
|
|
g_signal_emit (G_OBJECT (v4lmjpegsrc),
|
|
gst_v4lmjpegsrc_signals[SIGNAL_FRAME_LOST], 0,
|
|
v4lmjpegsrc->bsync.seq - v4lmjpegsrc->last_seq - 1);
|
|
}
|
|
}
|
|
v4lmjpegsrc->last_seq = v4lmjpegsrc->bsync.seq;
|
|
|
|
/* decide how often we're going to write the frame - set
|
|
* v4lmjpegsrc->need_writes to (that-1) and have_frame to TRUE
|
|
* if we're going to write it - else, just continue.
|
|
*
|
|
* time is generally the system or audio clock. Let's
|
|
* say that we've written one second of audio, then we want
|
|
* to have written one second of video too, within the same
|
|
* timeframe. This means that if time - begin_time = X sec,
|
|
* we want to have written X*fps frames. If we've written
|
|
* more - drop, if we've written less - dup... */
|
|
if (v4lmjpegsrc->handled * (GST_SECOND / fps) - time >
|
|
1.5 * (GST_SECOND / fps)) {
|
|
/* yo dude, we've got too many frames here! Drop! DROP! */
|
|
v4lmjpegsrc->need_writes--; /* -= (v4lmjpegsrc->handled - (time / fps)); */
|
|
g_signal_emit (G_OBJECT (v4lmjpegsrc),
|
|
gst_v4lmjpegsrc_signals[SIGNAL_FRAME_DROP], 0);
|
|
} else if (v4lmjpegsrc->handled * (GST_SECOND / fps) - time <
|
|
-1.5 * (GST_SECOND / fps)) {
|
|
/* this means we're lagging far behind */
|
|
v4lmjpegsrc->need_writes++; /* += ((time / fps) - v4lmjpegsrc->handled); */
|
|
g_signal_emit (G_OBJECT (v4lmjpegsrc),
|
|
gst_v4lmjpegsrc_signals[SIGNAL_FRAME_INSERT], 0);
|
|
}
|
|
|
|
if (v4lmjpegsrc->need_writes > 0) {
|
|
have_frame = TRUE;
|
|
v4lmjpegsrc->use_num_times[num] = v4lmjpegsrc->need_writes;
|
|
v4lmjpegsrc->need_writes--;
|
|
} else {
|
|
gst_v4lmjpegsrc_requeue_frame (v4lmjpegsrc, num);
|
|
}
|
|
} while (!have_frame);
|
|
} else {
|
|
/* grab a frame from the device */
|
|
if (!gst_v4lmjpegsrc_grab_frame (v4lmjpegsrc, &num,
|
|
&v4lmjpegsrc->last_size))
|
|
return NULL;
|
|
|
|
v4lmjpegsrc->use_num_times[num] = 1;
|
|
}
|
|
|
|
buf = gst_buffer_new ();
|
|
GST_BUFFER_FREE_DATA_FUNC (buf) = gst_v4lmjpegsrc_buffer_free;
|
|
GST_BUFFER_PRIVATE (buf) = v4lmjpegsrc;
|
|
GST_BUFFER_DATA (buf) = gst_v4lmjpegsrc_get_buffer (v4lmjpegsrc, num);
|
|
GST_BUFFER_SIZE (buf) = v4lmjpegsrc->last_size;
|
|
GST_BUFFER_MAXSIZE (buf) = v4lmjpegsrc->breq.size;
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY | GST_BUFFER_DONTFREE);
|
|
if (v4lmjpegsrc->use_fixed_fps)
|
|
GST_BUFFER_TIMESTAMP (buf) = v4lmjpegsrc->handled * GST_SECOND / fps;
|
|
else /* calculate time based on our own clock */
|
|
GST_BUFFER_TIMESTAMP (buf) =
|
|
GST_TIMEVAL_TO_TIME (v4lmjpegsrc->bsync.timestamp) -
|
|
v4lmjpegsrc->substract_time;
|
|
|
|
v4lmjpegsrc->handled++;
|
|
g_signal_emit (G_OBJECT (v4lmjpegsrc),
|
|
gst_v4lmjpegsrc_signals[SIGNAL_FRAME_CAPTURE], 0);
|
|
|
|
return GST_DATA (buf);
|
|
}
|
|
|
|
|
|
static GstCaps *
|
|
gst_v4lmjpegsrc_getcaps (GstPad * pad)
|
|
{
|
|
GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad));
|
|
struct video_capability *vcap = &GST_V4LELEMENT (v4lmjpegsrc)->vcap;
|
|
|
|
if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lmjpegsrc))) {
|
|
return NULL;
|
|
}
|
|
|
|
return gst_caps_new_simple ("video/x-jpeg",
|
|
"width", GST_TYPE_INT_RANGE, vcap->maxwidth / 4, vcap->maxwidth,
|
|
"height", GST_TYPE_INT_RANGE, vcap->maxheight / 4, vcap->maxheight,
|
|
"framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4lmjpegsrc_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstV4lMjpegSrc *v4lmjpegsrc;
|
|
|
|
g_return_if_fail (GST_IS_V4LMJPEGSRC (object));
|
|
v4lmjpegsrc = GST_V4LMJPEGSRC (object);
|
|
|
|
switch (prop_id) {
|
|
#if 0
|
|
case ARG_X_OFFSET:
|
|
v4lmjpegsrc->x_offset = g_value_get_int (value);
|
|
break;
|
|
case ARG_Y_OFFSET:
|
|
v4lmjpegsrc->y_offset = g_value_get_int (value);
|
|
break;
|
|
case ARG_F_WIDTH:
|
|
v4lmjpegsrc->frame_width = g_value_get_int (value);
|
|
break;
|
|
case ARG_F_HEIGHT:
|
|
v4lmjpegsrc->frame_height = g_value_get_int (value);
|
|
break;
|
|
#endif
|
|
case ARG_QUALITY:
|
|
v4lmjpegsrc->quality = g_value_get_int (value);
|
|
break;
|
|
case ARG_NUMBUFS:
|
|
v4lmjpegsrc->numbufs = g_value_get_int (value);
|
|
break;
|
|
case ARG_USE_FIXED_FPS:
|
|
if (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc))) {
|
|
v4lmjpegsrc->use_fixed_fps = g_value_get_boolean (value);
|
|
}
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4lmjpegsrc_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstV4lMjpegSrc *v4lmjpegsrc;
|
|
|
|
g_return_if_fail (GST_IS_V4LMJPEGSRC (object));
|
|
v4lmjpegsrc = GST_V4LMJPEGSRC (object);
|
|
|
|
switch (prop_id) {
|
|
#if 0
|
|
case ARG_X_OFFSET:
|
|
g_value_set_int (value, v4lmjpegsrc->x_offset);
|
|
break;
|
|
case ARG_Y_OFFSET:
|
|
g_value_set_int (value, v4lmjpegsrc->y_offset);
|
|
break;
|
|
case ARG_F_WIDTH:
|
|
g_value_set_int (value, v4lmjpegsrc->frame_width);
|
|
break;
|
|
case ARG_F_HEIGHT:
|
|
g_value_set_int (value, v4lmjpegsrc->frame_height);
|
|
break;
|
|
#endif
|
|
case ARG_QUALITY:
|
|
g_value_set_int (value, v4lmjpegsrc->quality);
|
|
break;
|
|
case ARG_NUMBUFS:
|
|
if (GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc)))
|
|
g_value_set_int (value, v4lmjpegsrc->breq.count);
|
|
else
|
|
g_value_set_int (value, v4lmjpegsrc->numbufs);
|
|
break;
|
|
case ARG_BUFSIZE:
|
|
g_value_set_int (value, v4lmjpegsrc->breq.size);
|
|
break;
|
|
case ARG_USE_FIXED_FPS:
|
|
g_value_set_boolean (value, v4lmjpegsrc->use_fixed_fps);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static GstElementStateReturn
|
|
gst_v4lmjpegsrc_change_state (GstElement * element)
|
|
{
|
|
GstV4lMjpegSrc *v4lmjpegsrc;
|
|
GTimeVal time;
|
|
|
|
g_return_val_if_fail (GST_IS_V4LMJPEGSRC (element), GST_STATE_FAILURE);
|
|
|
|
v4lmjpegsrc = GST_V4LMJPEGSRC (element);
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
/* actual buffer set-up used to be done here - but I moved
|
|
* it to capsnego itself */
|
|
v4lmjpegsrc->handled = 0;
|
|
v4lmjpegsrc->need_writes = 0;
|
|
v4lmjpegsrc->last_frame = 0;
|
|
v4lmjpegsrc->substract_time = 0;
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
/* queue all buffer, start streaming capture */
|
|
if (!gst_v4lmjpegsrc_capture_start (v4lmjpegsrc))
|
|
return GST_STATE_FAILURE;
|
|
g_get_current_time (&time);
|
|
v4lmjpegsrc->substract_time = GST_TIMEVAL_TO_TIME (time) -
|
|
v4lmjpegsrc->substract_time;
|
|
v4lmjpegsrc->last_seq = 0;
|
|
break;
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
g_get_current_time (&time);
|
|
v4lmjpegsrc->substract_time = GST_TIMEVAL_TO_TIME (time) -
|
|
v4lmjpegsrc->substract_time;
|
|
/* de-queue all queued buffers */
|
|
if (!gst_v4lmjpegsrc_capture_stop (v4lmjpegsrc))
|
|
return GST_STATE_FAILURE;
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
/* stop capturing, unmap all buffers */
|
|
if (!gst_v4lmjpegsrc_capture_deinit (v4lmjpegsrc))
|
|
return GST_STATE_FAILURE;
|
|
break;
|
|
}
|
|
|
|
if (GST_ELEMENT_CLASS (parent_class)->change_state)
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
|
|
return GST_STATE_SUCCESS;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4lmjpegsrc_set_clock (GstElement * element, GstClock * clock)
|
|
{
|
|
GST_V4LMJPEGSRC (element)->clock = clock;
|
|
}
|
|
|
|
|
|
#if 0
|
|
static GstBuffer *
|
|
gst_v4lmjpegsrc_buffer_new (GstBufferPool * pool,
|
|
guint64 offset, guint size, gpointer user_data)
|
|
{
|
|
GstBuffer *buffer;
|
|
GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (user_data);
|
|
|
|
if (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc)))
|
|
return NULL;
|
|
|
|
buffer = gst_buffer_new ();
|
|
if (!buffer)
|
|
return NULL;
|
|
|
|
/* TODO: add interlacing info to buffer as metadata */
|
|
GST_BUFFER_MAXSIZE (buffer) = v4lmjpegsrc->breq.size;
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_DONTFREE);
|
|
|
|
return buffer;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
gst_v4lmjpegsrc_buffer_free (GstBuffer * buf)
|
|
{
|
|
GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (GST_BUFFER_PRIVATE (buf));
|
|
int n;
|
|
|
|
if (gst_element_get_state (GST_ELEMENT (v4lmjpegsrc)) != GST_STATE_PLAYING)
|
|
return; /* we've already cleaned up ourselves */
|
|
|
|
for (n = 0; n < v4lmjpegsrc->breq.count; n++)
|
|
if (GST_BUFFER_DATA (buf) == gst_v4lmjpegsrc_get_buffer (v4lmjpegsrc, n)) {
|
|
v4lmjpegsrc->use_num_times[n]--;
|
|
if (v4lmjpegsrc->use_num_times[n] <= 0) {
|
|
gst_v4lmjpegsrc_requeue_frame (v4lmjpegsrc, n);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (n == v4lmjpegsrc->breq.count)
|
|
GST_ELEMENT_ERROR (v4lmjpegsrc, RESOURCE, TOO_LAZY, (NULL),
|
|
("Couldn't find the buffer"));
|
|
}
|