diff options
Diffstat (limited to 'subprojects/gst-plugins-bad/ext/libmms/gstmms.c')
| -rw-r--r-- | subprojects/gst-plugins-bad/ext/libmms/gstmms.c | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/subprojects/gst-plugins-bad/ext/libmms/gstmms.c b/subprojects/gst-plugins-bad/ext/libmms/gstmms.c new file mode 100644 index 0000000000..b127a1f57a --- /dev/null +++ b/subprojects/gst-plugins-bad/ext/libmms/gstmms.c @@ -0,0 +1,637 @@ +/* + * + * GStreamer + * Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <gst/gst.h> +#include <stdio.h> +#include <string.h> +#include "gstmms.h" + +#define DEFAULT_CONNECTION_SPEED 0 + +enum +{ + PROP_0, + PROP_LOCATION, + PROP_CONNECTION_SPEED +}; + + +GST_DEBUG_CATEGORY_STATIC (mmssrc_debug); +#define GST_CAT_DEFAULT mmssrc_debug + +static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/x-ms-asf") + ); + +static void gst_mms_finalize (GObject * gobject); +static void gst_mms_uri_handler_init (gpointer g_iface, gpointer iface_data); + +static void gst_mms_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_mms_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static gboolean gst_mms_query (GstBaseSrc * src, GstQuery * query); + +static gboolean gst_mms_start (GstBaseSrc * bsrc); +static gboolean gst_mms_stop (GstBaseSrc * bsrc); +static gboolean gst_mms_is_seekable (GstBaseSrc * src); +static gboolean gst_mms_get_size (GstBaseSrc * src, guint64 * size); +static gboolean gst_mms_prepare_seek_segment (GstBaseSrc * src, + GstEvent * event, GstSegment * segment); +static gboolean gst_mms_do_seek (GstBaseSrc * src, GstSegment * segment); + +static GstFlowReturn gst_mms_create (GstPushSrc * psrc, GstBuffer ** buf); + +static gboolean gst_mms_uri_set_uri (GstURIHandler * handler, + const gchar * uri, GError ** error); + +#define gst_mms_parent_class parent_class +G_DEFINE_TYPE_WITH_CODE (GstMMS, gst_mms, GST_TYPE_PUSH_SRC, + G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_mms_uri_handler_init)); +GST_ELEMENT_REGISTER_DEFINE (mmssrc, "mmssrc", GST_RANK_NONE, GST_TYPE_MMS); + +/* initialize the plugin's class */ +static void +gst_mms_class_init (GstMMSClass * klass) +{ + GObjectClass *gobject_class = (GObjectClass *) klass; + GstElementClass *gstelement_class = (GstElementClass *) klass; + GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass; + GstPushSrcClass *gstpushsrc_class = (GstPushSrcClass *) klass; + + gobject_class->set_property = gst_mms_set_property; + gobject_class->get_property = gst_mms_get_property; + gobject_class->finalize = gst_mms_finalize; + + g_object_class_install_property (gobject_class, PROP_LOCATION, + g_param_spec_string ("location", "location", + "Host URL to connect to. Accepted are mms://, mmsu://, mmst:// URL types", + NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + + /* Note: connection-speed is intentionaly limited to G_MAXINT as libmms + * uses int for it */ + g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED, + g_param_spec_uint64 ("connection-speed", "Connection Speed", + "Network connection speed in kbps (0 = unknown)", + 0, G_MAXINT / 1000, DEFAULT_CONNECTION_SPEED, + G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); + + gst_element_class_add_static_pad_template (gstelement_class, &src_factory); + + gst_element_class_set_static_metadata (gstelement_class, + "MMS streaming source", "Source/Network", + "Receive data streamed via MSFT Multi Media Server protocol", + "Maciej Katafiasz <mathrick@users.sourceforge.net>"); + + GST_DEBUG_CATEGORY_INIT (mmssrc_debug, "mmssrc", 0, "MMS Source Element"); + + gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_mms_start); + gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_mms_stop); + + gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_mms_create); + + gstbasesrc_class->is_seekable = GST_DEBUG_FUNCPTR (gst_mms_is_seekable); + gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_mms_get_size); + gstbasesrc_class->prepare_seek_segment = + GST_DEBUG_FUNCPTR (gst_mms_prepare_seek_segment); + gstbasesrc_class->do_seek = GST_DEBUG_FUNCPTR (gst_mms_do_seek); + gstbasesrc_class->query = GST_DEBUG_FUNCPTR (gst_mms_query); +} + +/* initialize the new element + * instantiate pads and add them to element + * set functions + * initialize structure + */ +static void +gst_mms_init (GstMMS * mmssrc) +{ + mmssrc->uri_name = NULL; + mmssrc->current_connection_uri_name = NULL; + mmssrc->connection = NULL; + mmssrc->connection_speed = DEFAULT_CONNECTION_SPEED; +} + +static void +gst_mms_finalize (GObject * gobject) +{ + GstMMS *mmssrc = GST_MMS (gobject); + + /* We may still have a connection open, as we preserve unused / pristine + open connections in stop to reuse them in start. */ + if (mmssrc->connection) { + mmsx_close (mmssrc->connection); + mmssrc->connection = NULL; + } + + if (mmssrc->current_connection_uri_name) { + g_free (mmssrc->current_connection_uri_name); + mmssrc->current_connection_uri_name = NULL; + } + + if (mmssrc->uri_name) { + g_free (mmssrc->uri_name); + mmssrc->uri_name = NULL; + } + + G_OBJECT_CLASS (parent_class)->finalize (gobject); +} + +/* FIXME operating in TIME rather than BYTES could remove this altogether + * and be more convenient elsewhere */ +static gboolean +gst_mms_query (GstBaseSrc * src, GstQuery * query) +{ + GstMMS *mmssrc = GST_MMS (src); + gboolean res = TRUE; + GstFormat format; + gint64 value; + + switch (GST_QUERY_TYPE (query)) { + case GST_QUERY_POSITION: + gst_query_parse_position (query, &format, &value); + if (format != GST_FORMAT_BYTES) { + res = FALSE; + break; + } + value = (gint64) mmsx_get_current_pos (mmssrc->connection); + gst_query_set_position (query, format, value); + break; + case GST_QUERY_DURATION: + if (!mmsx_get_seekable (mmssrc->connection)) { + res = FALSE; + break; + } + gst_query_parse_duration (query, &format, &value); + switch (format) { + case GST_FORMAT_BYTES: + value = (gint64) mmsx_get_length (mmssrc->connection); + gst_query_set_duration (query, format, value); + break; + case GST_FORMAT_TIME: + value = mmsx_get_time_length (mmssrc->connection) * GST_SECOND; + gst_query_set_duration (query, format, value); + break; + default: + res = FALSE; + } + break; + default: + /* chain to parent */ + res = + GST_BASE_SRC_CLASS (parent_class)->query (GST_BASE_SRC (src), query); + break; + } + + return res; +} + + +static gboolean +gst_mms_prepare_seek_segment (GstBaseSrc * src, GstEvent * event, + GstSegment * segment) +{ + GstSeekType cur_type, stop_type; + gint64 cur, stop; + GstSeekFlags flags; + GstFormat seek_format; + gdouble rate; + + gst_event_parse_seek (event, &rate, &seek_format, &flags, + &cur_type, &cur, &stop_type, &stop); + + if (seek_format != GST_FORMAT_BYTES && seek_format != GST_FORMAT_TIME) { + GST_LOG_OBJECT (src, "Only byte or time seeking is supported"); + return FALSE; + } + + if (stop_type != GST_SEEK_TYPE_NONE) { + GST_LOG_OBJECT (src, "Stop seeking not supported"); + return FALSE; + } + + if (cur_type != GST_SEEK_TYPE_NONE && cur_type != GST_SEEK_TYPE_SET) { + GST_LOG_OBJECT (src, "Only absolute seeking is supported"); + return FALSE; + } + + /* We would like to convert from GST_FORMAT_TIME to GST_FORMAT_BYTES here + when needed, but we cannot as to do that we need to actually do the seek, + so we handle this in do_seek instead. */ + + /* FIXME implement relative seeking, we could do any needed relevant + seeking calculations here (in seek_format metrics), before the re-init + of the segment. */ + + gst_segment_init (segment, seek_format); + gst_segment_do_seek (segment, rate, seek_format, flags, cur_type, cur, + stop_type, stop, NULL); + + return TRUE; +} + +static gboolean +gst_mms_do_seek (GstBaseSrc * src, GstSegment * segment) +{ + gint64 start; + GstMMS *mmssrc = GST_MMS (src); + + if (segment->format == GST_FORMAT_TIME) { + if (!mmsx_time_seek (NULL, mmssrc->connection, + (double) segment->start / GST_SECOND)) { + GST_LOG_OBJECT (mmssrc, "mmsx_time_seek() failed"); + return FALSE; + } + start = mmsx_get_current_pos (mmssrc->connection); + GST_INFO_OBJECT (mmssrc, + "performed seek to %" GST_TIME_FORMAT ", offset after " "seek: %" + G_GINT64_FORMAT, GST_TIME_ARGS (segment->start), start); + } else if (segment->format == GST_FORMAT_BYTES) { + start = mmsx_seek (NULL, mmssrc->connection, segment->start, SEEK_SET); + /* mmsx_seek will close and reopen the connection when seeking with the + mmsh protocol, if the reopening fails this is indicated with -1 */ + if (start == -1) { + GST_DEBUG_OBJECT (mmssrc, "connection broken during seek"); + return FALSE; + } + GST_INFO_OBJECT (mmssrc, "performed seek to: %" G_GINT64_FORMAT " bytes, " + "result: %" G_GINT64_FORMAT, segment->start, start); + } else { + GST_DEBUG_OBJECT (mmssrc, "unsupported seek segment format: %s", + GST_STR_NULL (gst_format_get_name (segment->format))); + return FALSE; + } + gst_segment_init (segment, GST_FORMAT_BYTES); + gst_segment_do_seek (segment, segment->rate, GST_FORMAT_BYTES, + GST_SEEK_FLAG_NONE, GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_NONE, + segment->stop, NULL); + return TRUE; +} + + +/* get function + * this function generates new data when needed + */ + + +static GstFlowReturn +gst_mms_create (GstPushSrc * psrc, GstBuffer ** buf) +{ + GstMMS *mmssrc = GST_MMS (psrc); + guint8 *data; + guint blocksize; + gint result; + goffset offset; + + *buf = NULL; + + offset = mmsx_get_current_pos (mmssrc->connection); + + /* Check if a seek perhaps has wrecked our connection */ + if (offset == -1) { + GST_ERROR_OBJECT (mmssrc, + "connection broken (probably an error during mmsx_seek_time during a convert query) returning FLOW_ERROR"); + return GST_FLOW_ERROR; + } + + /* Choose blocksize best for optimum performance */ + if (offset == 0) + blocksize = mmsx_get_asf_header_len (mmssrc->connection); + else + blocksize = mmsx_get_asf_packet_len (mmssrc->connection); + + data = g_try_malloc (blocksize); + if (!data) { + GST_ERROR_OBJECT (mmssrc, "Failed to allocate %u bytes", blocksize); + return GST_FLOW_ERROR; + } + + GST_LOG_OBJECT (mmssrc, "reading %d bytes", blocksize); + result = mmsx_read (NULL, mmssrc->connection, (char *) data, blocksize); + /* EOS? */ + if (result == 0) + goto eos; + + *buf = gst_buffer_new_wrapped (data, result); + GST_BUFFER_OFFSET (*buf) = offset; + + GST_LOG_OBJECT (mmssrc, "Returning buffer with offset %" G_GOFFSET_FORMAT + " and size %u", offset, result); + + return GST_FLOW_OK; + +eos: + { + GST_DEBUG_OBJECT (mmssrc, "EOS"); + g_free (data); + *buf = NULL; + return GST_FLOW_EOS; + } +} + +static gboolean +gst_mms_is_seekable (GstBaseSrc * src) +{ + GstMMS *mmssrc = GST_MMS (src); + + return mmsx_get_seekable (mmssrc->connection); +} + +static gboolean +gst_mms_get_size (GstBaseSrc * src, guint64 * size) +{ + GstMMS *mmssrc = GST_MMS (src); + + /* non seekable usually means live streams, and get_length() returns, + erm, interesting values for live streams */ + if (!mmsx_get_seekable (mmssrc->connection)) + return FALSE; + + *size = mmsx_get_length (mmssrc->connection); + return TRUE; +} + +static gboolean +gst_mms_start (GstBaseSrc * bsrc) +{ + GstMMS *mms = GST_MMS (bsrc); + guint bandwidth_avail; + + if (!mms->uri_name || *mms->uri_name == '\0') + goto no_uri; + + if (mms->connection_speed) + bandwidth_avail = mms->connection_speed; + else + bandwidth_avail = G_MAXINT; + + /* If we already have a connection, and the uri isn't changed, reuse it, + as connecting is expensive. */ + if (mms->connection) { + if (!strcmp (mms->uri_name, mms->current_connection_uri_name)) { + GST_DEBUG_OBJECT (mms, "Reusing existing connection for %s", + mms->uri_name); + return TRUE; + } else { + mmsx_close (mms->connection); + g_free (mms->current_connection_uri_name); + mms->current_connection_uri_name = NULL; + } + } + + /* FIXME: pass some sane arguments here */ + GST_DEBUG_OBJECT (mms, + "Trying mms_connect (%s) with bandwidth constraint of %d bps", + mms->uri_name, bandwidth_avail); + mms->connection = mmsx_connect (NULL, NULL, mms->uri_name, bandwidth_avail); + if (mms->connection) { + /* Save the uri name so that it can be checked for connection reusing, + see above. */ + mms->current_connection_uri_name = g_strdup (mms->uri_name); + GST_DEBUG_OBJECT (mms, "Connect successful"); + return TRUE; + } else { + gchar *url, *location; + + GST_ERROR_OBJECT (mms, + "Could not connect to this stream, redirecting to rtsp"); + location = strstr (mms->uri_name, "://"); + if (location == NULL || *location == '\0' || *(location + 3) == '\0') + goto no_uri; + url = g_strdup_printf ("rtsp://%s", location + 3); + + gst_element_post_message (GST_ELEMENT_CAST (mms), + gst_message_new_element (GST_OBJECT_CAST (mms), + gst_structure_new ("redirect", "new-location", G_TYPE_STRING, url, + NULL))); + + /* post an error message as well, so that applications that don't handle + * redirect messages get to see a proper error message */ + GST_ELEMENT_ERROR (mms, RESOURCE, OPEN_READ, + ("Could not connect to streaming server."), + ("A redirect message was posted on the bus and should have been " + "handled by the application.")); + + return FALSE; + } + +no_uri: + { + GST_ELEMENT_ERROR (mms, RESOURCE, OPEN_READ, + ("No URI to open specified"), (NULL)); + return FALSE; + } +} + +static gboolean +gst_mms_stop (GstBaseSrc * bsrc) +{ + GstMMS *mms = GST_MMS (bsrc); + + if (mms->connection != NULL) { + /* Check if the connection is still pristine, that is if no more then + just the mmslib cached asf header has been read. If it is still pristine + preserve it as we often are re-started with the same URL and connecting + is expensive */ + if (mmsx_get_current_pos (mms->connection) > + mmsx_get_asf_header_len (mms->connection)) { + mmsx_close (mms->connection); + mms->connection = NULL; + g_free (mms->current_connection_uri_name); + mms->current_connection_uri_name = NULL; + } + } + return TRUE; +} + +static void +gst_mms_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstMMS *mmssrc = GST_MMS (object); + + switch (prop_id) { + case PROP_LOCATION: + gst_mms_uri_set_uri (GST_URI_HANDLER (mmssrc), + g_value_get_string (value), NULL); + break; + case PROP_CONNECTION_SPEED: + GST_OBJECT_LOCK (mmssrc); + mmssrc->connection_speed = g_value_get_uint64 (value) * 1000; + GST_OBJECT_UNLOCK (mmssrc); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_mms_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstMMS *mmssrc = GST_MMS (object); + + GST_OBJECT_LOCK (mmssrc); + switch (prop_id) { + case PROP_LOCATION: + if (mmssrc->uri_name) + g_value_set_string (value, mmssrc->uri_name); + break; + case PROP_CONNECTION_SPEED: + g_value_set_uint64 (value, mmssrc->connection_speed / 1000); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } + GST_OBJECT_UNLOCK (mmssrc); +} + +/* entry point to initialize the plug-in + * initialize the plug-in itself + * register the element factories and pad templates + * register the features + */ +static gboolean +plugin_init (GstPlugin * plugin) +{ + return GST_ELEMENT_REGISTER (mmssrc, plugin); +} + +static GstURIType +gst_mms_uri_get_type (GType type) +{ + return GST_URI_SRC; +} + +static const gchar *const * +gst_mms_uri_get_protocols (GType type) +{ + static const gchar *protocols[] = { "mms", "mmsh", "mmst", "mmsu", NULL }; + + return protocols; +} + +static gchar * +gst_mms_uri_get_uri (GstURIHandler * handler) +{ + GstMMS *src = GST_MMS (handler); + + /* FIXME: make thread-safe */ + return g_strdup (src->uri_name); +} + +static gchar * +gst_mms_src_make_valid_uri (const gchar * uri) +{ + gchar *protocol; + const gchar *colon, *tmp; + gsize len; + + if (!uri || !gst_uri_is_valid (uri)) + return NULL; + + protocol = gst_uri_get_protocol (uri); + + if ((strcmp (protocol, "mms") != 0) && (strcmp (protocol, "mmsh") != 0) && + (strcmp (protocol, "mmst") != 0) && (strcmp (protocol, "mmsu") != 0)) { + g_free (protocol); + return FALSE; + } + g_free (protocol); + + colon = strstr (uri, "://"); + if (!colon) + return NULL; + + tmp = colon + 3; + len = strlen (tmp); + if (len == 0) + return NULL; + + /* libmms segfaults if there's no hostname or + * no / after the hostname + */ + colon = strstr (tmp, "/"); + if (colon == tmp) + return NULL; + + if (strstr (tmp, "/") == NULL) { + gchar *ret; + + len = strlen (uri); + ret = g_malloc0 (len + 2); + memcpy (ret, uri, len); + ret[len] = '/'; + return ret; + } else { + return g_strdup (uri); + } +} + +static gboolean +gst_mms_uri_set_uri (GstURIHandler * handler, const gchar * uri, + GError ** error) +{ + GstMMS *src = GST_MMS (handler); + gchar *fixed_uri; + + fixed_uri = gst_mms_src_make_valid_uri (uri); + if (!fixed_uri && uri) { + g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI, + "Invalid MMS URI"); + return FALSE; + } + + GST_OBJECT_LOCK (src); + g_free (src->uri_name); + src->uri_name = fixed_uri; + GST_OBJECT_UNLOCK (src); + + return TRUE; +} + +static void +gst_mms_uri_handler_init (gpointer g_iface, gpointer iface_data) +{ + GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface; + + iface->get_type = gst_mms_uri_get_type; + iface->get_protocols = gst_mms_uri_get_protocols; + iface->get_uri = gst_mms_uri_get_uri; + iface->set_uri = gst_mms_uri_set_uri; +} + +/* this is the structure that gst-register looks for + * so keep the name plugin_desc, or you cannot get your plug-in registered */ +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + mms, + "Microsoft Multi Media Server streaming protocol support", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) |