138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/*
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* GStreamer transform backend
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*
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* Copyright 2022 Rémi Bernon for CodeWeavers
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#include "config.h"
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/audio/audio.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "winternl.h"
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#include "dshow.h"
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#include "unix_private.h"
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GST_DEBUG_CATEGORY_EXTERN(wine);
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#define GST_CAT_DEFAULT wine
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struct wg_transform
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{
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GstPad *my_src, *my_sink;
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};
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static GstFlowReturn transform_sink_chain_cb(GstPad *pad, GstObject *parent, GstBuffer *buffer)
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{
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struct wg_transform *transform = gst_pad_get_element_private(pad);
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GST_INFO("transform %p, buffer %p.", transform, buffer);
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gst_buffer_unref(buffer);
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return GST_FLOW_OK;
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}
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NTSTATUS wg_transform_destroy(void *args)
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{
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struct wg_transform *transform = args;
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if (transform->my_sink)
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g_object_unref(transform->my_sink);
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if (transform->my_src)
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g_object_unref(transform->my_src);
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free(transform);
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return STATUS_SUCCESS;
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}
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NTSTATUS wg_transform_create(void *args)
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{
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struct wg_transform_create_params *params = args;
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struct wg_format output_format = *params->output_format;
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struct wg_format input_format = *params->input_format;
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GstCaps *src_caps = NULL, *sink_caps = NULL;
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GstPadTemplate *template = NULL;
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struct wg_transform *transform;
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NTSTATUS status;
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if (!init_gstreamer())
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return STATUS_UNSUCCESSFUL;
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status = STATUS_NO_MEMORY;
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if (!(transform = calloc(1, sizeof(*transform))))
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goto done;
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if (!(src_caps = wg_format_to_caps(&input_format)))
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goto done;
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if (!(sink_caps = wg_format_to_caps(&output_format)))
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goto done;
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if (!(template = gst_pad_template_new("src", GST_PAD_SRC, GST_PAD_ALWAYS, src_caps)))
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goto done;
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if (!(transform->my_src = gst_pad_new_from_template(template, "src")))
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goto done;
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g_object_unref(template);
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template = NULL;
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if (!(template = gst_pad_template_new("sink", GST_PAD_SINK, GST_PAD_ALWAYS, sink_caps)))
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goto done;
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if (!(transform->my_sink = gst_pad_new_from_template(template, "sink")))
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goto done;
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g_object_unref(template);
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template = NULL;
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gst_pad_set_element_private(transform->my_sink, transform);
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gst_pad_set_chain_function(transform->my_sink, transform_sink_chain_cb);
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status = STATUS_SUCCESS;
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done:
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if (template)
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g_object_unref(template);
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if (sink_caps)
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gst_caps_unref(sink_caps);
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if (src_caps)
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gst_caps_unref(src_caps);
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if (status)
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{
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GST_ERROR("Failed to create winegstreamer transform.");
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if (transform)
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wg_transform_destroy(transform);
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}
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else
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{
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GST_INFO("Created winegstreamer transform %p.", transform);
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params->transform = transform;
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}
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return status;
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}
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