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b6411ae74c
For each lib we build export its own API in headers when we're building it, otherwise import the API from the headers. This fixes linker warnings on Windows when building with MSVC. The problem was that we had defined all GST_*_API decorators unconditionally to GST_EXPORT. This was intentional and only supposed to be temporary, but caused linker warnings because we tell the linker that we want to export all symbols even those from externall DLLs, and when the linker notices that they were in external DLLS and not present locally it warns. What we need to do when building each library is: export the library's own symbols and import all other symbols. To this end we define e.g. BUILDING_GST_FOO and then we define the GST_FOO_API decorator either to export or to import symbols depending on whether BUILDING_GST_FOO is set or not. That way external users of each library API automatically get the import. While we're at it, add new GST_API_EXPORT in config.h and use that for GST_*_API decorators instead of GST_EXPORT. The right export define depends on the toolchain and whether we're using -fvisibility=hidden or not, so it's better to set it to the right thing directly than hard-coding a compiler whitelist in the public header. We put the export define into config.h instead of passing it via the command line to the compiler because it might contain spaces and brackets and in the autotools scenario we'd have to pass that through multiple layers of plumbing and Makefile/shell escaping and we're just not going to be *that* lucky. The export define is only used if we're compiling our lib, not by external users of the lib headers, so it's not a problem to put it into config.h Also, this means all .c files of libs need to include config.h to get the export marker defined, so fix up a few that didn't include config.h. This commit depends on a common submodule commit that makes gst-glib-gen.mak add an #include "config.h" to generated enum/marshal .c files for the autotools build. https://bugzilla.gnome.org/show_bug.cgi?id=797185
102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/*
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* Copyright (c) 2015, Collabora Ltd.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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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 "sctpsendmeta.h"
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static gboolean gst_sctp_send_meta_init (GstMeta * meta, gpointer params,
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GstBuffer * buffer);
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static gboolean gst_sctp_send_meta_transform (GstBuffer * transbuf,
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GstMeta * meta, GstBuffer * buffer, GQuark type, gpointer data);
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GType
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gst_sctp_send_meta_api_get_type (void)
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{
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static const gchar *tags[] = { NULL };
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static volatile GType type;
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstSctpSendMetaAPI", tags);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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const GstMetaInfo *
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gst_sctp_send_meta_get_info (void)
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{
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static const GstMetaInfo *gst_sctp_send_meta_info = NULL;
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if (g_once_init_enter (&gst_sctp_send_meta_info)) {
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const GstMetaInfo *meta = gst_meta_register (GST_SCTP_SEND_META_API_TYPE,
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"GstSctpSendMeta",
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sizeof (GstSctpSendMeta),
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gst_sctp_send_meta_init,
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(GstMetaFreeFunction) NULL,
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gst_sctp_send_meta_transform);
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g_once_init_leave (&gst_sctp_send_meta_info, meta);
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}
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return gst_sctp_send_meta_info;
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}
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static gboolean
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gst_sctp_send_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
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{
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GstSctpSendMeta *gst_sctp_send_meta = (GstSctpSendMeta *) meta;
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gst_sctp_send_meta->ppid = 0;
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gst_sctp_send_meta->ordered = TRUE;
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gst_sctp_send_meta->pr = GST_SCTP_SEND_META_PARTIAL_RELIABILITY_NONE;
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gst_sctp_send_meta->pr_param = 0;
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return TRUE;
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}
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static gboolean
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gst_sctp_send_meta_transform (GstBuffer * transbuf, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstSctpSendMeta *gst_sctp_send_meta = (GstSctpSendMeta *) meta;
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gst_sctp_buffer_add_send_meta (transbuf, gst_sctp_send_meta->ppid,
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gst_sctp_send_meta->ordered, gst_sctp_send_meta->pr,
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gst_sctp_send_meta->pr_param);
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return TRUE;
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}
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GstSctpSendMeta *
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gst_sctp_buffer_add_send_meta (GstBuffer * buffer, guint32 ppid,
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gboolean ordered, GstSctpSendMetaPartiallyReliability pr, guint32 pr_param)
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{
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GstSctpSendMeta *gst_sctp_send_meta = NULL;
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g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
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gst_sctp_send_meta =
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(GstSctpSendMeta *) gst_buffer_add_meta (buffer, GST_SCTP_SEND_META_INFO,
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NULL);
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gst_sctp_send_meta->ppid = ppid;
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gst_sctp_send_meta->ordered = ordered;
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gst_sctp_send_meta->pr = pr;
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gst_sctp_send_meta->pr_param = pr_param;
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return gst_sctp_send_meta;
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}
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