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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Original commit message from CVS: Added typefind helper. Small preroll fix in the base sink. Disable typefind code in basesrc. Crude port of typefindelement. Fakesrc cleanups.
762 lines
18 KiB
C
762 lines
18 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000,2005 Wim Taymans <wim@fluendo.com>
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*
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* gstbasesrc.c:
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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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#include <stdlib.h>
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#include <string.h>
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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 "gstbasesrc.h"
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#include "gsttypefindhelper.h"
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#include <gst/gstmarshal.h>
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#define DEFAULT_BLOCKSIZE 4096
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GST_DEBUG_CATEGORY_STATIC (gst_basesrc_debug);
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#define GST_CAT_DEFAULT gst_basesrc_debug
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/* BaseSrc signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_BLOCKSIZE,
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};
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static GstElementClass *parent_class = NULL;
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static void gst_basesrc_base_init (gpointer g_class);
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static void gst_basesrc_class_init (GstBaseSrcClass * klass);
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static void gst_basesrc_init (GstBaseSrc * src, gpointer g_class);
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GType
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gst_basesrc_get_type (void)
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{
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static GType basesrc_type = 0;
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if (!basesrc_type) {
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static const GTypeInfo basesrc_info = {
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sizeof (GstBaseSrcClass),
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(GBaseInitFunc) gst_basesrc_base_init,
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NULL,
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(GClassInitFunc) gst_basesrc_class_init,
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NULL,
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NULL,
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sizeof (GstBaseSrc),
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0,
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(GInstanceInitFunc) gst_basesrc_init,
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};
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basesrc_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstBaseSrc", &basesrc_info, G_TYPE_FLAG_ABSTRACT);
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}
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return basesrc_type;
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}
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static gboolean gst_basesrc_activate (GstPad * pad, GstActivateMode mode);
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static void gst_basesrc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_basesrc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_basesrc_event_handler (GstPad * pad, GstEvent * event);
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static const GstEventMask *gst_basesrc_get_event_mask (GstPad * pad);
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static const GstQueryType *gst_basesrc_get_query_types (GstPad * pad);
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static gboolean gst_basesrc_query (GstPad * pad, GstQueryType type,
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GstFormat * format, gint64 * value);
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static const GstFormat *gst_basesrc_get_formats (GstPad * pad);
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static gboolean gst_basesrc_unlock (GstBaseSrc * basesrc);
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static gboolean gst_basesrc_get_size (GstBaseSrc * basesrc, guint64 * size);
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static gboolean gst_basesrc_start (GstBaseSrc * basesrc);
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static gboolean gst_basesrc_stop (GstBaseSrc * basesrc);
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static GstElementStateReturn gst_basesrc_change_state (GstElement * element);
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static void gst_basesrc_loop (GstPad * pad);
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static gboolean gst_basesrc_check_get_range (GstPad * pad);
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static GstFlowReturn gst_basesrc_get_range (GstPad * pad, guint64 offset,
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guint length, GstBuffer ** buf);
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static void
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gst_basesrc_base_init (gpointer g_class)
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{
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GST_DEBUG_CATEGORY_INIT (gst_basesrc_debug, "basesrc", 0, "basesrc element");
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}
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static void
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gst_basesrc_class_init (GstBaseSrcClass * 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_ELEMENT);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_basesrc_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_basesrc_get_property);
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
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g_param_spec_ulong ("blocksize", "Block size",
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"Size in bytes to read per buffer", 1, G_MAXULONG, DEFAULT_BLOCKSIZE,
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G_PARAM_READWRITE));
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_basesrc_change_state);
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}
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static void
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gst_basesrc_init (GstBaseSrc * basesrc, gpointer g_class)
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{
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GstPad *pad;
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GstPadTemplate *pad_template;
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
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g_return_if_fail (pad_template != NULL);
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pad = gst_pad_new_from_template (pad_template, "src");
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gst_pad_set_activate_function (pad, gst_basesrc_activate);
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gst_pad_set_event_function (pad, gst_basesrc_event_handler);
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gst_pad_set_event_mask_function (pad, gst_basesrc_get_event_mask);
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gst_pad_set_query_function (pad, gst_basesrc_query);
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gst_pad_set_query_type_function (pad, gst_basesrc_get_query_types);
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gst_pad_set_formats_function (pad, gst_basesrc_get_formats);
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gst_pad_set_loop_function (pad, gst_basesrc_loop);
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gst_pad_set_checkgetrange_function (pad, gst_basesrc_check_get_range);
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gst_pad_set_getrange_function (pad, gst_basesrc_get_range);
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/* hold ref to pad */
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basesrc->srcpad = pad;
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gst_element_add_pad (GST_ELEMENT (basesrc), pad);
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basesrc->segment_start = -1;
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basesrc->segment_end = -1;
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basesrc->blocksize = DEFAULT_BLOCKSIZE;
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GST_FLAG_UNSET (basesrc, GST_BASESRC_STARTED);
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}
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static const GstFormat *
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gst_basesrc_get_formats (GstPad * pad)
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{
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static const GstFormat formats[] = {
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GST_FORMAT_DEFAULT,
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GST_FORMAT_BYTES,
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0,
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};
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return formats;
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}
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static const GstQueryType *
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gst_basesrc_get_query_types (GstPad * pad)
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{
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static const GstQueryType types[] = {
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GST_QUERY_TOTAL,
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GST_QUERY_POSITION,
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GST_QUERY_START,
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GST_QUERY_SEGMENT_END,
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0,
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};
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return types;
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}
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static gboolean
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gst_basesrc_query (GstPad * pad, GstQueryType type,
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GstFormat * format, gint64 * value)
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{
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GstBaseSrc *src = GST_BASESRC (GST_PAD_PARENT (pad));
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if (*format == GST_FORMAT_DEFAULT)
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*format = GST_FORMAT_BYTES;
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switch (type) {
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case GST_QUERY_TOTAL:
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switch (*format) {
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case GST_FORMAT_BYTES:
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{
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gboolean ret;
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ret = gst_basesrc_get_size (src, value);
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GST_DEBUG ("getting length %d %lld", ret, *value);
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return ret;
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}
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case GST_FORMAT_PERCENT:
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*value = GST_FORMAT_PERCENT_MAX;
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return TRUE;
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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_QUERY_POSITION:
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switch (*format) {
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case GST_FORMAT_BYTES:
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*value = src->offset;
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break;
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case GST_FORMAT_PERCENT:
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if (!gst_basesrc_get_size (src, value))
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return FALSE;
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*value = src->offset * GST_FORMAT_PERCENT_MAX / *value;
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return TRUE;
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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_QUERY_START:
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*value = src->segment_start;
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return TRUE;
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case GST_QUERY_SEGMENT_END:
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*value = src->segment_end;
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return TRUE;
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default:
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return FALSE;
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}
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return FALSE;
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}
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static const GstEventMask *
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gst_basesrc_get_event_mask (GstPad * pad)
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{
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static const GstEventMask masks[] = {
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{GST_EVENT_SEEK, GST_SEEK_METHOD_CUR | GST_SEEK_METHOD_SET |
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GST_SEEK_METHOD_END | GST_SEEK_FLAG_FLUSH |
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GST_SEEK_FLAG_SEGMENT_LOOP},
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{GST_EVENT_FLUSH, 0},
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{GST_EVENT_SIZE, 0},
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{0, 0},
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};
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return masks;
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}
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static gboolean
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gst_basesrc_do_seek (GstBaseSrc * src, GstEvent * event)
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{
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GstFormat format;
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gint64 offset;
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format = GST_EVENT_SEEK_FORMAT (event);
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/* get seek format */
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if (format == GST_FORMAT_DEFAULT)
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format = GST_FORMAT_BYTES;
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/* we can only seek bytes */
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if (format != GST_FORMAT_BYTES)
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return FALSE;
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/* get seek positions */
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offset = GST_EVENT_SEEK_OFFSET (event);
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src->segment_start = offset;
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src->segment_end = GST_EVENT_SEEK_ENDOFFSET (event);
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src->segment_loop = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
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/* send flush start */
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gst_pad_push_event (src->srcpad, gst_event_new_flush (FALSE));
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/* unblock streaming thread */
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gst_basesrc_unlock (src);
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/* grab streaming lock */
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GST_STREAM_LOCK (src->srcpad);
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switch (GST_EVENT_SEEK_METHOD (event)) {
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case GST_SEEK_METHOD_SET:
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if (offset < 0)
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goto error;
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src->offset = MIN (offset, src->size);
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GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT,
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src->offset);
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break;
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case GST_SEEK_METHOD_CUR:
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offset += src->offset;
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src->offset = CLAMP (offset, 0, src->size);
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GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT,
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src->offset);
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break;
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case GST_SEEK_METHOD_END:
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if (offset > 0)
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goto error;
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offset = src->size + offset;
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src->offset = MAX (0, offset);
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GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT,
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src->offset);
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break;
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default:
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goto error;
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}
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/* send flush end */
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gst_pad_push_event (src->srcpad, gst_event_new_flush (TRUE));
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/* now send discont */
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{
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GstEvent *event;
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event = gst_event_new_discontinuous (1.0,
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GST_FORMAT_TIME,
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(gint64) src->segment_start, (gint64) src->segment_end, NULL);
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gst_pad_push_event (src->srcpad, event);
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}
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/* and restart the task */
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if (GST_RPAD_TASK (src->srcpad)) {
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gst_task_start (GST_RPAD_TASK (src->srcpad));
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}
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GST_STREAM_UNLOCK (src->srcpad);
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gst_event_unref (event);
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return TRUE;
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/* ERROR */
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error:
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{
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GST_DEBUG_OBJECT (src, "seek error");
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GST_STREAM_UNLOCK (src->srcpad);
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gst_event_unref (event);
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return FALSE;
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}
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}
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static gboolean
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gst_basesrc_event_handler (GstPad * pad, GstEvent * event)
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{
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GstBaseSrc *src;
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GstBaseSrcClass *bclass;
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gboolean result;
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src = GST_BASESRC (GST_PAD_PARENT (pad));
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bclass = GST_BASESRC_GET_CLASS (src);
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if (bclass->event)
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result = bclass->event (src, event);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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return gst_basesrc_do_seek (src, event);
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case GST_EVENT_SIZE:
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{
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GstFormat format;
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format = GST_EVENT_SIZE_FORMAT (event);
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if (format == GST_FORMAT_DEFAULT)
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format = GST_FORMAT_BYTES;
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/* we can only accept bytes */
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if (format != GST_FORMAT_BYTES)
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return FALSE;
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src->blocksize = GST_EVENT_SIZE_VALUE (event);
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g_object_notify (G_OBJECT (src), "blocksize");
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break;
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}
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case GST_EVENT_FLUSH:
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/* cancel any blocking getrange */
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if (!GST_EVENT_FLUSH_DONE (event))
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gst_basesrc_unlock (src);
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break;
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default:
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break;
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}
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gst_event_unref (event);
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return TRUE;
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}
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static void
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gst_basesrc_set_property (GObject * object, guint prop_id, const GValue * value,
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GParamSpec * pspec)
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{
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GstBaseSrc *src;
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src = GST_BASESRC (object);
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switch (prop_id) {
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case ARG_BLOCKSIZE:
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src->blocksize = 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_basesrc_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstBaseSrc *src;
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src = GST_BASESRC (object);
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switch (prop_id) {
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case ARG_BLOCKSIZE:
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g_value_set_int (value, src->blocksize);
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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 GstFlowReturn
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gst_basesrc_get_range_unlocked (GstPad * pad, guint64 offset, guint length,
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GstBuffer ** buf)
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{
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GstFlowReturn ret;
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GstBaseSrc *src;
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GstBaseSrcClass *bclass;
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src = GST_BASESRC (GST_OBJECT_PARENT (pad));
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bclass = GST_BASESRC_GET_CLASS (src);
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if (!GST_FLAG_IS_SET (src, GST_BASESRC_STARTED))
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goto not_started;
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if (!bclass->create)
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goto no_function;
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/* check size */
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if (src->size != -1) {
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if (offset + length > src->size) {
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if (bclass->get_size)
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bclass->get_size (src, &src->size);
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if (offset + length > src->size) {
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length = src->size - offset;
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}
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}
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}
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if (length == 0)
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return GST_FLOW_UNEXPECTED;
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ret = bclass->create (src, offset, length, buf);
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return ret;
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/* ERROR */
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not_started:
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{
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GST_DEBUG_OBJECT (src, "getrange but not started");
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return GST_FLOW_WRONG_STATE;
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}
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no_function:
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{
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GST_DEBUG_OBJECT (src, "no create function");
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return GST_FLOW_ERROR;
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}
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}
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static GstFlowReturn
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gst_basesrc_get_range (GstPad * pad, guint64 offset, guint length,
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GstBuffer ** ret)
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{
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GstFlowReturn fret;
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GST_STREAM_LOCK (pad);
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fret = gst_basesrc_get_range_unlocked (pad, offset, length, ret);
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GST_STREAM_UNLOCK (pad);
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return fret;
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}
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static gboolean
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gst_basesrc_check_get_range (GstPad * pad)
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{
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GstBaseSrc *src;
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src = GST_BASESRC (GST_OBJECT_PARENT (pad));
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if (!GST_FLAG_IS_SET (src, GST_BASESRC_STARTED)) {
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gst_basesrc_start (src);
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gst_basesrc_stop (src);
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}
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return src->seekable;
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}
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static void
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gst_basesrc_loop (GstPad * pad)
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{
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GstBaseSrc *src;
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GstBuffer *buf = NULL;
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GstFlowReturn ret;
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src = GST_BASESRC (GST_OBJECT_PARENT (pad));
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GST_STREAM_LOCK (pad);
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|
|
ret = gst_basesrc_get_range_unlocked (pad, src->offset, src->blocksize, &buf);
|
|
if (ret != GST_FLOW_OK)
|
|
goto eos;
|
|
|
|
src->offset += GST_BUFFER_SIZE (buf);
|
|
|
|
ret = gst_pad_push (pad, buf);
|
|
if (ret != GST_FLOW_OK)
|
|
goto pause;
|
|
|
|
GST_STREAM_UNLOCK (pad);
|
|
return;
|
|
|
|
eos:
|
|
{
|
|
GST_DEBUG_OBJECT (src, "going to EOS");
|
|
gst_task_pause (GST_RPAD_TASK (pad));
|
|
gst_pad_push_event (pad, gst_event_new (GST_EVENT_EOS));
|
|
GST_STREAM_UNLOCK (pad);
|
|
return;
|
|
}
|
|
pause:
|
|
{
|
|
GST_DEBUG_OBJECT (src, "pausing task");
|
|
gst_task_pause (GST_RPAD_TASK (pad));
|
|
GST_STREAM_UNLOCK (pad);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesrc_unlock (GstBaseSrc * basesrc)
|
|
{
|
|
GstBaseSrcClass *bclass;
|
|
gboolean result = FALSE;
|
|
|
|
bclass = GST_BASESRC_GET_CLASS (basesrc);
|
|
if (bclass->unlock)
|
|
result = bclass->unlock (basesrc);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesrc_get_size (GstBaseSrc * basesrc, guint64 * size)
|
|
{
|
|
GstBaseSrcClass *bclass;
|
|
gboolean result = FALSE;
|
|
|
|
bclass = GST_BASESRC_GET_CLASS (basesrc);
|
|
if (bclass->get_size)
|
|
result = bclass->get_size (basesrc, size);
|
|
|
|
if (result)
|
|
basesrc->size = *size;
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesrc_start (GstBaseSrc * basesrc)
|
|
{
|
|
GstBaseSrcClass *bclass;
|
|
gboolean result;
|
|
|
|
if (GST_FLAG_IS_SET (basesrc, GST_BASESRC_STARTED))
|
|
return TRUE;
|
|
|
|
bclass = GST_BASESRC_GET_CLASS (basesrc);
|
|
if (bclass->start)
|
|
result = bclass->start (basesrc);
|
|
else
|
|
result = TRUE;
|
|
|
|
if (!result)
|
|
goto could_not_start;
|
|
|
|
GST_FLAG_SET (basesrc, GST_BASESRC_STARTED);
|
|
|
|
/* start in the beginning */
|
|
basesrc->offset = 0;
|
|
basesrc->segment_start = 0;
|
|
|
|
/* figure out the size */
|
|
if (bclass->get_size) {
|
|
result = bclass->get_size (basesrc, &basesrc->size);
|
|
} else {
|
|
result = FALSE;
|
|
basesrc->size = -1;
|
|
}
|
|
|
|
GST_DEBUG ("size %d %lld", result, basesrc->size);
|
|
|
|
/* we always run to the end */
|
|
basesrc->segment_end = -1;
|
|
|
|
/* check if we can seek */
|
|
if (bclass->is_seekable)
|
|
basesrc->seekable = bclass->is_seekable (basesrc);
|
|
else
|
|
basesrc->seekable = FALSE;
|
|
|
|
/* run typefind */
|
|
#if 0
|
|
if (basesrc->seekable) {
|
|
GstCaps *caps;
|
|
|
|
caps = gst_type_find_helper (basesrc->srcpad, basesrc->size);
|
|
gst_pad_set_caps (basesrc->srcpad, caps);
|
|
}
|
|
#endif
|
|
|
|
return TRUE;
|
|
|
|
/* ERROR */
|
|
could_not_start:
|
|
{
|
|
GST_DEBUG_OBJECT (basesrc, "could not start");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesrc_stop (GstBaseSrc * basesrc)
|
|
{
|
|
GstBaseSrcClass *bclass;
|
|
gboolean result = TRUE;
|
|
|
|
if (!GST_FLAG_IS_SET (basesrc, GST_BASESRC_STARTED))
|
|
return TRUE;
|
|
|
|
bclass = GST_BASESRC_GET_CLASS (basesrc);
|
|
if (bclass->stop)
|
|
result = bclass->stop (basesrc);
|
|
|
|
if (result)
|
|
GST_FLAG_UNSET (basesrc, GST_BASESRC_STARTED);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesrc_activate (GstPad * pad, GstActivateMode mode)
|
|
{
|
|
gboolean result;
|
|
GstBaseSrc *basesrc;
|
|
|
|
basesrc = GST_BASESRC (GST_OBJECT_PARENT (pad));
|
|
|
|
/* prepare subclass first */
|
|
switch (mode) {
|
|
case GST_ACTIVATE_PUSH:
|
|
case GST_ACTIVATE_PULL:
|
|
result = gst_basesrc_start (basesrc);
|
|
break;
|
|
default:
|
|
result = TRUE;
|
|
break;
|
|
}
|
|
/* if that failed we can stop here */
|
|
if (!result)
|
|
goto error_start;
|
|
|
|
result = FALSE;
|
|
switch (mode) {
|
|
case GST_ACTIVATE_PUSH:
|
|
/* if we have a scheduler we can start the task */
|
|
if (GST_ELEMENT_SCHEDULER (basesrc)) {
|
|
GST_STREAM_LOCK (pad);
|
|
GST_RPAD_TASK (pad) =
|
|
gst_scheduler_create_task (GST_ELEMENT_SCHEDULER (basesrc),
|
|
(GstTaskFunction) gst_basesrc_loop, pad);
|
|
|
|
gst_task_start (GST_RPAD_TASK (pad));
|
|
GST_STREAM_UNLOCK (pad);
|
|
result = TRUE;
|
|
}
|
|
break;
|
|
case GST_ACTIVATE_PULL:
|
|
result = TRUE;
|
|
break;
|
|
case GST_ACTIVATE_NONE:
|
|
/* step 1, unblock clock sync (if any) */
|
|
|
|
/* step 2, make sure streaming finishes */
|
|
GST_STREAM_LOCK (pad);
|
|
/* step 3, stop the task */
|
|
if (GST_RPAD_TASK (pad)) {
|
|
gst_task_stop (GST_RPAD_TASK (pad));
|
|
gst_object_unref (GST_OBJECT (GST_RPAD_TASK (pad)));
|
|
GST_RPAD_TASK (pad) = NULL;
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
|
|
result = TRUE;
|
|
break;
|
|
}
|
|
return result;
|
|
|
|
/* ERROR */
|
|
error_start:
|
|
{
|
|
GST_DEBUG_OBJECT (basesrc, "failed to start");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static GstElementStateReturn
|
|
gst_basesrc_change_state (GstElement * element)
|
|
{
|
|
GstBaseSrc *basesrc;
|
|
GstElementStateReturn result = GST_STATE_FAILURE;
|
|
GstElementState transition;
|
|
|
|
basesrc = GST_BASESRC (element);
|
|
|
|
transition = GST_STATE_TRANSITION (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result = GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
result = gst_basesrc_stop (basesrc);
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|