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Original commit message from CVS: 2004-01-06 Ronald Bultje <rbultje@ronald.bitfreak.net> * sys/v4l/gstv4lmjpegsrc.c: (gst_v4lmjpegsrc_get), (gst_v4lmjpegsrc_buffer_free): * sys/v4l/gstv4lsrc.c: (gst_v4lsrc_palette_to_caps), (gst_v4lsrc_srcconnect), (gst_v4lsrc_getcaps), (gst_v4lsrc_get), (gst_v4lsrc_buffer_free): Fix for removed bufferpools.
848 lines
24 KiB
C
848 lines
24 KiB
C
/* G-Streamer BT8x8/V4L frame grabber 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 <sys/time.h>
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#include "v4lsrc_calls.h"
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#include <gst/video/video.h>
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/* elementfactory information */
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static GstElementDetails gst_v4lsrc_details = GST_ELEMENT_DETAILS (
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"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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);
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/* V4lSrc signals and args */
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enum {
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/* FILL ME */
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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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LAST_SIGNAL
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};
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/* arguments */
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enum {
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ARG_0,
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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_v4lsrc_get_formats,
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GST_FORMAT_TIME, GST_FORMAT_DEFAULT);
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GST_QUERY_TYPE_FUNCTION (GstPad *, gst_v4lsrc_get_query_types,
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GST_QUERY_POSITION);
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/* init functions */
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static void gst_v4lsrc_base_init (gpointer g_class);
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static void gst_v4lsrc_class_init (GstV4lSrcClass *klass);
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static void gst_v4lsrc_init (GstV4lSrc *v4lsrc);
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/* pad/info functions */
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static gboolean gst_v4lsrc_src_convert (GstPad *pad,
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GstFormat src_format,
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gint64 src_value,
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GstFormat *dest_format,
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gint64 *dest_value);
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static gboolean gst_v4lsrc_src_query (GstPad *pad,
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GstQueryType type,
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GstFormat *format,
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gint64 *value);
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/* buffer functions */
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static GstPadLinkReturn gst_v4lsrc_srcconnect (GstPad *pad,
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const GstCaps *caps);
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static GstCaps* gst_v4lsrc_getcaps (GstPad *pad);
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static GstData* gst_v4lsrc_get (GstPad *pad);
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/* get/set params */
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static void gst_v4lsrc_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gst_v4lsrc_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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/* state handling */
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static GstElementStateReturn gst_v4lsrc_change_state (GstElement *element);
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/* set_clock function for a/V sync */
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static void gst_v4lsrc_set_clock (GstElement *element,
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GstClock *clock);
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/* requeue buffer if it's back available */
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static void gst_v4lsrc_buffer_free (GstData *data);
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static GstElementClass *parent_class = NULL;
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static guint gst_v4lsrc_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_v4lsrc_get_type (void)
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{
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static GType v4lsrc_type = 0;
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if (!v4lsrc_type) {
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static const GTypeInfo v4lsrc_info = {
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sizeof(GstV4lSrcClass),
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gst_v4lsrc_base_init,
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NULL,
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(GClassInitFunc)gst_v4lsrc_class_init,
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NULL,
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NULL,
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sizeof(GstV4lSrc),
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0,
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(GInstanceInitFunc)gst_v4lsrc_init,
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NULL
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};
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v4lsrc_type = g_type_register_static(GST_TYPE_V4LELEMENT, "GstV4lSrc", &v4lsrc_info, 0);
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}
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return v4lsrc_type;
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}
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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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GstPadTemplate *src_template;
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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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src_template = gst_pad_template_new (
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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NULL);
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gst_element_class_add_pad_template (gstelement_class, src_template);
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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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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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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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G_MININT,G_MAXINT,0,G_PARAM_READABLE));
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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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G_MININT,G_MAXINT,0,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 frabbed frames",
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TRUE, G_PARAM_READWRITE));
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/* signals */
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gst_v4lsrc_signals[SIGNAL_FRAME_CAPTURE] =
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g_signal_new("frame_capture", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET(GstV4lSrcClass, frame_capture),
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NULL, NULL, g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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gst_v4lsrc_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(GstV4lSrcClass, frame_drop),
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NULL, NULL, g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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gst_v4lsrc_signals[SIGNAL_FRAME_INSERT] =
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g_signal_new("frame_insert", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET(GstV4lSrcClass, frame_insert),
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NULL, NULL, g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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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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gstelement_class->change_state = gst_v4lsrc_change_state;
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gstelement_class->set_clock = gst_v4lsrc_set_clock;
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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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GstElementClass *klass = GST_ELEMENT_GET_CLASS (v4lsrc);
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GST_FLAG_SET(GST_ELEMENT(v4lsrc), GST_ELEMENT_THREAD_SUGGESTED);
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v4lsrc->srcpad = gst_pad_new_from_template (
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gst_element_class_get_pad_template (klass, "src"), "src");
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gst_element_add_pad(GST_ELEMENT(v4lsrc), v4lsrc->srcpad);
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gst_pad_set_get_function (v4lsrc->srcpad, gst_v4lsrc_get);
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gst_pad_set_getcaps_function (v4lsrc->srcpad, gst_v4lsrc_getcaps);
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gst_pad_set_link_function (v4lsrc->srcpad, gst_v4lsrc_srcconnect);
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gst_pad_set_convert_function (v4lsrc->srcpad, gst_v4lsrc_src_convert);
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gst_pad_set_formats_function (v4lsrc->srcpad, gst_v4lsrc_get_formats);
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gst_pad_set_query_function (v4lsrc->srcpad, gst_v4lsrc_src_query);
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gst_pad_set_query_type_function (v4lsrc->srcpad, gst_v4lsrc_get_query_types);
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v4lsrc->buffer_size = 0;
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/* no clock */
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v4lsrc->clock = NULL;
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/* fps */
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v4lsrc->use_fixed_fps = TRUE;
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}
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static gfloat
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gst_v4lsrc_get_fps (GstV4lSrc *v4lsrc)
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{
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gint norm;
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gfloat fps;
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if (!v4lsrc->use_fixed_fps &&
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v4lsrc->clock != NULL &&
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v4lsrc->handled > 0) {
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/* try to get time from clock master and calculate fps */
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GstClockTime time = gst_clock_get_time(v4lsrc->clock) - v4lsrc->substract_time;
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return v4lsrc->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(v4lsrc)))
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return 0.;
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if (!gst_v4l_get_chan_norm(GST_V4LELEMENT(v4lsrc), 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_v4lsrc_src_convert (GstPad *pad,
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GstFormat src_format,
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gint64 src_value,
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GstFormat *dest_format,
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gint64 *dest_value)
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{
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GstV4lSrc *v4lsrc;
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gdouble fps;
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v4lsrc = GST_V4LSRC (gst_pad_get_parent (pad));
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if ((fps = gst_v4lsrc_get_fps(v4lsrc)) == 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_v4lsrc_src_query (GstPad *pad,
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GstQueryType type,
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GstFormat *format,
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gint64 *value)
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{
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GstV4lSrc *v4lsrc = GST_V4LSRC (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_v4lsrc_get_fps(v4lsrc)) == 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 = v4lsrc->handled * GST_SECOND / fps;
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break;
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case GST_FORMAT_DEFAULT:
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*value = v4lsrc->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 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, "
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"green_mask = 0x03e0, "
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"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, "
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"green_mask = 0x07f0, "
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"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 = " R_MASK_24 ", "
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"green_mask = " G_MASK_24 ", "
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"blue_mask = " B_MASK_24);
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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) 24, "
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"depth = (int) 32, "
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"endianness = (int) BIG_ENDIAN, "
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"red_mask = " R_MASK_32 ", "
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"green_mask = " G_MASK_32 ", "
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"blue_mask = " B_MASK_32);
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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 GstPadLinkReturn
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gst_v4lsrc_srcconnect (GstPad *pad, const GstCaps *vscapslist)
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{
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GstV4lSrc *v4lsrc;
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guint32 fourcc;
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gint bpp, depth, w, h, palette = -1;
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gdouble fps;
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GstStructure *structure;
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v4lsrc = GST_V4LSRC (gst_pad_get_parent (pad));
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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(v4lsrc)))
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{
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if (!gst_v4lsrc_capture_deinit(v4lsrc))
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return GST_PAD_LINK_REFUSED;
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}
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else if (!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lsrc)))
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{
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return GST_PAD_LINK_DELAYED;
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}
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structure = gst_caps_get_structure (vscapslist, 0);
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if (!strcmp(gst_structure_get_name (structure), "video/x-raw-yuv"))
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gst_structure_get_fourcc (structure, "format", &fourcc);
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else
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fourcc = GST_MAKE_FOURCC('R','G','B',' ');
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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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gst_structure_get_double (structure, "framerate", &fps);
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if (fps != gst_v4lsrc_get_fps(v4lsrc))
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return GST_PAD_LINK_REFUSED;
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switch (fourcc)
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{
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case GST_MAKE_FOURCC('I','4','2','0'):
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palette = VIDEO_PALETTE_YUV420P;
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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)
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
if (!gst_v4lsrc_set_capture(v4lsrc, w, h, palette))
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
if (!gst_v4lsrc_capture_init(v4lsrc))
|
|
return GST_PAD_LINK_REFUSED;
|
|
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
|
|
static GstCaps *
|
|
gst_v4lsrc_getcaps (GstPad *pad)
|
|
{
|
|
GstCaps *list;
|
|
GstV4lSrc *v4lsrc = GST_V4LSRC(gst_pad_get_parent(pad));
|
|
int palette[] = {
|
|
VIDEO_PALETTE_YUV422,
|
|
VIDEO_PALETTE_YUV420P,
|
|
VIDEO_PALETTE_UYVY,
|
|
VIDEO_PALETTE_YUV411P,
|
|
VIDEO_PALETTE_YUV422P,
|
|
VIDEO_PALETTE_YUV410P,
|
|
VIDEO_PALETTE_YUV411,
|
|
VIDEO_PALETTE_RGB555,
|
|
VIDEO_PALETTE_RGB565,
|
|
VIDEO_PALETTE_RGB24,
|
|
VIDEO_PALETTE_RGB32,
|
|
}, i;
|
|
struct video_capability *vcap = &GST_V4LELEMENT(v4lsrc)->vcap;
|
|
|
|
if (!GST_V4L_IS_OPEN(GST_V4LELEMENT(v4lsrc))) {
|
|
return gst_caps_new_any ();
|
|
} else if (GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lsrc))) {
|
|
return gst_caps_copy(GST_PAD_CAPS(v4lsrc->srcpad));
|
|
}
|
|
|
|
list = gst_caps_new_empty();
|
|
for (i = 0; i < 8; i++) {
|
|
GstCaps *one;
|
|
|
|
/* try palette out */
|
|
if (!gst_v4lsrc_try_palette(v4lsrc, palette[i]))
|
|
continue;
|
|
|
|
one = gst_v4lsrc_palette_to_caps(palette[i]);
|
|
if (!one) g_print ("Palette %d gave no caps\n", palette[i]);
|
|
gst_caps_set_simple (one,
|
|
"width", GST_TYPE_INT_RANGE, vcap->minwidth, vcap->maxwidth,
|
|
"height", GST_TYPE_INT_RANGE, vcap->minheight, vcap->maxheight,
|
|
"framerate", G_TYPE_DOUBLE, gst_v4lsrc_get_fps(v4lsrc),
|
|
NULL);
|
|
gst_caps_append(list, one);
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
|
|
static GstData *
|
|
gst_v4lsrc_get (GstPad *pad)
|
|
{
|
|
GstV4lSrc *v4lsrc;
|
|
GstBuffer *buf;
|
|
gint num;
|
|
gdouble fps = 0.;
|
|
|
|
g_return_val_if_fail (pad != NULL, NULL);
|
|
|
|
v4lsrc = GST_V4LSRC (gst_pad_get_parent (pad));
|
|
|
|
if (v4lsrc->use_fixed_fps &&
|
|
(fps = gst_v4lsrc_get_fps(v4lsrc)) == 0)
|
|
return NULL;
|
|
|
|
if (v4lsrc->need_writes > 0) {
|
|
/* use last frame */
|
|
num = v4lsrc->last_frame;
|
|
v4lsrc->need_writes--;
|
|
} else if (v4lsrc->clock && v4lsrc->use_fixed_fps) {
|
|
GstClockTime time;
|
|
gboolean have_frame = FALSE;
|
|
|
|
do {
|
|
/* by default, we use the frame once */
|
|
v4lsrc->need_writes = 1;
|
|
|
|
/* grab a frame from the device */
|
|
if (!gst_v4lsrc_grab_frame(v4lsrc, &num))
|
|
return NULL;
|
|
|
|
v4lsrc->last_frame = num;
|
|
time = v4lsrc->timestamp_sync - v4lsrc->substract_time;
|
|
|
|
/* decide how often we're going to write the frame - set
|
|
* v4lsrc->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 (v4lsrc->handled * (GST_SECOND/fps) - time > 1.5 * (GST_SECOND/fps)) {
|
|
/* yo dude, we've got too many frames here! Drop! DROP! */
|
|
v4lsrc->need_writes--; /* -= (v4lsrc->handled - (time / fps)); */
|
|
g_signal_emit(G_OBJECT(v4lsrc),
|
|
gst_v4lsrc_signals[SIGNAL_FRAME_DROP], 0);
|
|
} else if (v4lsrc->handled * (GST_SECOND/fps) - time < - 1.5 * (GST_SECOND/fps)) {
|
|
/* this means we're lagging far behind */
|
|
v4lsrc->need_writes++; /* += ((time / fps) - v4lsrc->handled); */
|
|
g_signal_emit(G_OBJECT(v4lsrc),
|
|
gst_v4lsrc_signals[SIGNAL_FRAME_INSERT], 0);
|
|
}
|
|
|
|
if (v4lsrc->need_writes > 0) {
|
|
have_frame = TRUE;
|
|
v4lsrc->use_num_times[num] = v4lsrc->need_writes;
|
|
v4lsrc->need_writes--;
|
|
} else {
|
|
gst_v4lsrc_requeue_frame(v4lsrc, num);
|
|
}
|
|
} while (!have_frame);
|
|
} else {
|
|
/* grab a frame from the device */
|
|
if (!gst_v4lsrc_grab_frame(v4lsrc, &num))
|
|
return NULL;
|
|
|
|
v4lsrc->use_num_times[num] = 1;
|
|
}
|
|
|
|
buf = gst_buffer_new ();
|
|
GST_DATA (buf)->free = gst_v4lsrc_buffer_free;
|
|
buf->pool = v4lsrc; /* hack to re-queue buffer on free */
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY | GST_BUFFER_DONTFREE);
|
|
GST_BUFFER_DATA(buf) = gst_v4lsrc_get_buffer(v4lsrc, num);
|
|
GST_BUFFER_MAXSIZE (buf) = v4lsrc->mbuf.size / v4lsrc->mbuf.frames;
|
|
GST_BUFFER_SIZE(buf) = v4lsrc->buffer_size;
|
|
if (v4lsrc->use_fixed_fps)
|
|
GST_BUFFER_TIMESTAMP(buf) = v4lsrc->handled * GST_SECOND / fps;
|
|
else /* calculate time based on our own clock */
|
|
GST_BUFFER_TIMESTAMP(buf) = v4lsrc->timestamp_sync - v4lsrc->substract_time;
|
|
|
|
v4lsrc->handled++;
|
|
g_signal_emit(G_OBJECT(v4lsrc),
|
|
gst_v4lsrc_signals[SIGNAL_FRAME_CAPTURE], 0);
|
|
|
|
return GST_DATA (buf);
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4lsrc_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GstV4lSrc *v4lsrc;
|
|
|
|
g_return_if_fail(GST_IS_V4LSRC(object));
|
|
v4lsrc = GST_V4LSRC(object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_USE_FIXED_FPS:
|
|
if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lsrc))) {
|
|
v4lsrc->use_fixed_fps = g_value_get_boolean(value);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4lsrc_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GstV4lSrc *v4lsrc;
|
|
|
|
g_return_if_fail(GST_IS_V4LSRC(object));
|
|
v4lsrc = GST_V4LSRC(object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_NUMBUFS:
|
|
g_value_set_int(value, v4lsrc->mbuf.frames);
|
|
break;
|
|
|
|
case ARG_BUFSIZE:
|
|
if (v4lsrc->mbuf.frames == 0)
|
|
g_value_set_int(value, 0);
|
|
else
|
|
g_value_set_int(value, v4lsrc->mbuf.size/(v4lsrc->mbuf.frames*1024));
|
|
break;
|
|
|
|
case ARG_USE_FIXED_FPS:
|
|
g_value_set_boolean(value, v4lsrc->use_fixed_fps);
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static GstElementStateReturn
|
|
gst_v4lsrc_change_state (GstElement *element)
|
|
{
|
|
GstV4lSrc *v4lsrc;
|
|
GTimeVal time;
|
|
gint transition = GST_STATE_TRANSITION (element);
|
|
|
|
g_return_val_if_fail(GST_IS_V4LSRC(element), GST_STATE_FAILURE);
|
|
|
|
v4lsrc = GST_V4LSRC(element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
v4lsrc->handled = 0;
|
|
v4lsrc->need_writes = 0;
|
|
v4lsrc->last_frame = 0;
|
|
v4lsrc->substract_time = 0;
|
|
/* buffer setup used to be done here, but I moved it to
|
|
* capsnego */
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
/* queue all buffer, start streaming capture */
|
|
if (!gst_v4lsrc_capture_start(v4lsrc))
|
|
return GST_STATE_FAILURE;
|
|
g_get_current_time(&time);
|
|
v4lsrc->substract_time = GST_TIMEVAL_TO_TIME(time) - v4lsrc->substract_time;
|
|
break;
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
/* de-queue all queued buffers */
|
|
if (!gst_v4lsrc_capture_stop(v4lsrc))
|
|
return GST_STATE_FAILURE;
|
|
g_get_current_time(&time);
|
|
v4lsrc->substract_time = GST_TIMEVAL_TO_TIME(time) - v4lsrc->substract_time;
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
/* stop capturing, unmap all buffers */
|
|
if (!gst_v4lsrc_capture_deinit(v4lsrc))
|
|
return GST_STATE_FAILURE;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
}
|
|
|
|
if (GST_ELEMENT_CLASS (parent_class)->change_state)
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
|
|
return GST_STATE_SUCCESS;
|
|
}
|
|
|
|
|
|
#if 0
|
|
static GstBuffer*
|
|
gst_v4lsrc_buffer_new (GstBufferPool *pool,
|
|
guint64 offset,
|
|
guint size,
|
|
gpointer user_data)
|
|
{
|
|
GstBuffer *buffer;
|
|
GstV4lSrc *v4lsrc = GST_V4LSRC(user_data);
|
|
|
|
if (!GST_V4L_IS_ACTIVE(GST_V4LELEMENT(v4lsrc)))
|
|
return NULL;
|
|
|
|
buffer = gst_buffer_new();
|
|
if (!buffer)
|
|
return NULL;
|
|
|
|
/* TODO: add interlacing info to buffer as metadata
|
|
* (height>288 or 240 = topfieldfirst, else noninterlaced) */
|
|
GST_BUFFER_MAXSIZE(buffer) = v4lsrc->mbuf.size / v4lsrc->mbuf.frames;
|
|
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_DONTFREE);
|
|
|
|
return buffer;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
gst_v4lsrc_buffer_free (GstData *data)
|
|
{
|
|
GstBuffer *buf = GST_BUFFER (data);
|
|
GstV4lSrc *v4lsrc = GST_V4LSRC (buf->pool);
|
|
int n;
|
|
|
|
if (gst_element_get_state(GST_ELEMENT(v4lsrc)) != GST_STATE_PLAYING)
|
|
return; /* we've already cleaned up ourselves */
|
|
|
|
for (n=0;n<v4lsrc->mbuf.frames;n++)
|
|
if (GST_BUFFER_DATA(buf) == gst_v4lsrc_get_buffer(v4lsrc, n))
|
|
{
|
|
v4lsrc->use_num_times[n]--;
|
|
if (v4lsrc->use_num_times[n] <= 0) {
|
|
gst_v4lsrc_requeue_frame(v4lsrc, n);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (n == v4lsrc->mbuf.frames)
|
|
gst_element_error(GST_ELEMENT(v4lsrc),
|
|
"Couldn\'t find the buffer");
|
|
|
|
/* free struct */
|
|
gst_buffer_default_free(buf);
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4lsrc_set_clock (GstElement *element,
|
|
GstClock *clock)
|
|
{
|
|
GST_V4LSRC(element)->clock = clock;
|
|
}
|
|
|