mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-27 14:30:27 +00:00
344 lines
9.5 KiB
C
344 lines
9.5 KiB
C
/* Copyright (C) 2016 Sebastian Dröge <sebastian@centricular.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "rssource.h"
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#include <string.h>
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#include <stdint.h>
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typedef struct {
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gchar *long_name;
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gchar *description;
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gchar *classification;
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gchar *author;
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void * (*create_instance) (void);
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gchar **protocols;
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} ElementData;
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static GHashTable *sources;
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/* Declarations for Rust code */
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extern gboolean sources_register (void *plugin);
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extern void source_drop (void * source);
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extern GstFlowReturn source_fill (void * source, uint64_t offset, void * data, size_t * data_len);
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extern gboolean source_do_seek (void * source, uint64_t start, uint64_t stop);
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extern gboolean source_set_uri (void * source, const char *uri);
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extern char * source_get_uri (void * source);
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extern uint64_t source_get_size (void * source);
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extern gboolean source_is_seekable (void * source);
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extern gboolean source_start (void * source);
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extern gboolean source_stop (void * source);
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GST_DEBUG_CATEGORY_STATIC (gst_rs_src_debug);
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#define GST_CAT_DEFAULT gst_rs_src_debug
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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_ANY);
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enum
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{
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PROP_0,
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PROP_URI
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};
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static void gst_rs_src_uri_handler_init (gpointer g_iface,
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gpointer iface_data);
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static void gst_rs_src_finalize (GObject * object);
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static void gst_rs_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_rs_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_rs_src_start (GstBaseSrc * basesrc);
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static gboolean gst_rs_src_stop (GstBaseSrc * basesrc);
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static gboolean gst_rs_src_is_seekable (GstBaseSrc * src);
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static gboolean gst_rs_src_get_size (GstBaseSrc * src, guint64 * size);
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static GstFlowReturn gst_rs_src_fill (GstBaseSrc * src, guint64 offset,
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guint length, GstBuffer * buf);
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static gboolean gst_rs_src_do_seek (GstBaseSrc * src, GstSegment * segment);
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static GObjectClass *parent_class;
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static void
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gst_rs_src_class_init (GstRsSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseSrcClass *gstbasesrc_class;
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ElementData * data = g_hash_table_lookup (sources, GSIZE_TO_POINTER (G_TYPE_FROM_CLASS (klass)));
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g_assert (data != NULL);
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gobject_class = G_OBJECT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
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gobject_class->set_property = gst_rs_src_set_property;
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gobject_class->get_property = gst_rs_src_get_property;
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g_object_class_install_property (gobject_class, PROP_URI,
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g_param_spec_string ("uri", "URI",
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"URI to read from", NULL,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
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GST_PARAM_MUTABLE_READY));
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gobject_class->finalize = gst_rs_src_finalize;
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gst_element_class_set_static_metadata (gstelement_class,
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data->long_name,
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data->classification,
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data->description,
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data->author);
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gst_element_class_add_static_pad_template (gstelement_class, &src_template);
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gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_rs_src_start);
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gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_rs_src_stop);
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gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_rs_src_is_seekable);
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gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_rs_src_get_size);
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gstbasesrc_class->fill = GST_DEBUG_FUNCPTR (gst_rs_src_fill);
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gstbasesrc_class->do_seek = GST_DEBUG_FUNCPTR (gst_rs_src_do_seek);
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}
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static void
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gst_rs_src_init (GstRsSrc * src, GstRsSrcClass * klass)
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{
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ElementData * data = g_hash_table_lookup (sources, GSIZE_TO_POINTER (G_TYPE_FROM_CLASS (klass)));
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g_assert (data != NULL);
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gst_base_src_set_blocksize (GST_BASE_SRC (src), 4096);
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src->instance = data->create_instance ();
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}
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static void
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gst_rs_src_finalize (GObject * object)
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{
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GstRsSrc *src = GST_RS_SRC (object);
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source_drop (src->instance);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_rs_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstRsSrc *src = GST_RS_SRC (object);
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switch (prop_id) {
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case PROP_URI:
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source_set_uri (src->instance, g_value_get_string (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_rs_src_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstRsSrc *src = GST_RS_SRC (object);
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switch (prop_id) {
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case PROP_URI:
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g_value_take_string (value, source_get_uri (src->instance));
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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_rs_src_fill (GstBaseSrc * basesrc, guint64 offset, guint length,
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GstBuffer * buf)
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{
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GstRsSrc *src = GST_RS_SRC (basesrc);
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GstMapInfo map;
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GstFlowReturn ret;
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gsize map_size, size;
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gst_buffer_map (buf, &map, GST_MAP_READWRITE);
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size = length;
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map_size = map.size;
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ret = source_fill (src->instance, offset, map.data, &size);
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gst_buffer_unmap (buf, &map);
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if (ret == GST_FLOW_OK && size != map_size)
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gst_buffer_resize (buf, 0, size);
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return ret;
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}
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static gboolean
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gst_rs_src_is_seekable (GstBaseSrc * basesrc)
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{
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GstRsSrc *src = GST_RS_SRC (basesrc);
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return source_is_seekable (src->instance);
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}
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static gboolean
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gst_rs_src_get_size (GstBaseSrc * basesrc, guint64 * size)
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{
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GstRsSrc *src = GST_RS_SRC (basesrc);
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*size = source_get_size (src->instance);
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return TRUE;
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}
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/* open the rs, necessary to go to READY state */
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static gboolean
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gst_rs_src_start (GstBaseSrc * basesrc)
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{
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GstRsSrc *src = GST_RS_SRC (basesrc);
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return source_start (src->instance);
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}
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static gboolean
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gst_rs_src_stop (GstBaseSrc * basesrc)
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{
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GstRsSrc *src = GST_RS_SRC (basesrc);
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return source_stop (src->instance);
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}
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static gboolean
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gst_rs_src_do_seek (GstBaseSrc * basesrc, GstSegment * segment)
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{
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GstRsSrc *src = GST_RS_SRC (basesrc);
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gboolean ret;
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ret = source_do_seek (src->instance, segment->start, segment->stop);
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if (!ret)
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return FALSE;
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return GST_BASE_SRC_CLASS (parent_class)->do_seek (basesrc, segment);
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}
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static GstURIType
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gst_rs_src_uri_get_type (GType type)
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{
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return GST_URI_SRC;
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}
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static const gchar *const *
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gst_rs_src_uri_get_protocols (GType type)
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{
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ElementData * data = g_hash_table_lookup (sources, GSIZE_TO_POINTER (type));
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g_assert (data != NULL);
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return (const gchar * const *) data->protocols;
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}
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static gchar *
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gst_rs_src_uri_get_uri (GstURIHandler * handler)
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{
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GstRsSrc *src = GST_RS_SRC (handler);
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return source_get_uri (src->instance);
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}
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static gboolean
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gst_rs_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
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GError ** err)
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{
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GstRsSrc *src = GST_RS_SRC (handler);
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if (!source_set_uri (src->instance, uri)) {
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g_set_error (err, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
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"Can't handle URI '%s'", uri);
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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 void
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gst_rs_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
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{
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GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
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iface->get_type = gst_rs_src_uri_get_type;
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iface->get_protocols = gst_rs_src_uri_get_protocols;
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iface->get_uri = gst_rs_src_uri_get_uri;
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iface->set_uri = gst_rs_src_uri_set_uri;
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}
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gboolean
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gst_rs_source_plugin_init (GstPlugin * plugin)
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{
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sources = g_hash_table_new (g_direct_hash, g_direct_equal);
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GST_DEBUG_CATEGORY_INIT (gst_rs_src_debug, "rssrc", 0, "rssrc element");
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parent_class = g_type_class_ref (GST_TYPE_BASE_SRC);
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return sources_register (plugin);
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}
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gboolean
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gst_rs_source_register (GstPlugin * plugin, const gchar *name, const gchar * long_name, const gchar * description, const gchar * classification, const gchar * author, GstRank rank, void * (*create_instance) (void), const gchar *protocols, gboolean push_only)
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{
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GTypeInfo type_info = {
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sizeof (GstRsSrcClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_rs_src_class_init,
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NULL,
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NULL,
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sizeof (GstRsSrc),
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0,
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(GInstanceInitFunc) gst_rs_src_init
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};
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GInterfaceInfo iface_info = {
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gst_rs_src_uri_handler_init,
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NULL,
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NULL
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};
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GType type;
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gchar *type_name;
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ElementData *data;
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data = g_new0 (ElementData, 1);
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data->long_name = g_strdup (long_name);
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data->description = g_strdup (description);
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data->classification = g_strdup (classification);
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data->author = g_strdup (author);
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data->create_instance = create_instance;
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data->protocols = g_strsplit (protocols, ":", -1);
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type_name = g_strconcat ("RsSrc-", name, NULL);
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type = g_type_register_static (push_only ? GST_TYPE_PUSH_SRC : GST_TYPE_BASE_SRC, type_name, &type_info, 0);
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g_free (type_name);
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g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &iface_info);
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g_hash_table_insert (sources, GSIZE_TO_POINTER (type), data);
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if (!gst_element_register (plugin, name, rank, type))
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return FALSE;
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return TRUE;
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}
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