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Sweden-Number/dlls/winegstreamer/wg_transform.c

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/*
* GStreamer transform backend
*
* Copyright 2022 Rémi Bernon for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winternl.h"
#include "dshow.h"
#include "unix_private.h"
GST_DEBUG_CATEGORY_EXTERN(wine);
#define GST_CAT_DEFAULT wine
struct wg_transform
{
GstElement *container;
GstPad *my_src, *my_sink;
GstPad *their_sink, *their_src;
GstSegment segment;
};
static GstFlowReturn transform_sink_chain_cb(GstPad *pad, GstObject *parent, GstBuffer *buffer)
{
struct wg_transform *transform = gst_pad_get_element_private(pad);
GST_INFO("transform %p, buffer %p.", transform, buffer);
gst_buffer_unref(buffer);
return GST_FLOW_OK;
}
NTSTATUS wg_transform_destroy(void *args)
{
struct wg_transform *transform = args;
gst_element_set_state(transform->container, GST_STATE_NULL);
g_object_unref(transform->their_sink);
g_object_unref(transform->their_src);
g_object_unref(transform->container);
g_object_unref(transform->my_sink);
g_object_unref(transform->my_src);
free(transform);
return STATUS_SUCCESS;
}
static GstElement *transform_find_element(GstElementFactoryListType type, GstCaps *src_caps, GstCaps *sink_caps)
{
GstElement *element = NULL;
GList *tmp, *transforms;
const gchar *name;
if (!(transforms = gst_element_factory_list_get_elements(type, GST_RANK_MARGINAL)))
goto done;
tmp = gst_element_factory_list_filter(transforms, src_caps, GST_PAD_SINK, FALSE);
gst_plugin_feature_list_free(transforms);
if (!(transforms = tmp))
goto done;
tmp = gst_element_factory_list_filter(transforms, sink_caps, GST_PAD_SRC, FALSE);
gst_plugin_feature_list_free(transforms);
if (!(transforms = tmp))
goto done;
transforms = g_list_sort(transforms, gst_plugin_feature_rank_compare_func);
for (tmp = transforms; tmp != NULL && element == NULL; tmp = tmp->next)
{
name = gst_plugin_feature_get_name(GST_PLUGIN_FEATURE(tmp->data));
if (!(element = gst_element_factory_create(GST_ELEMENT_FACTORY(tmp->data), NULL)))
GST_WARNING("Failed to create %s element.", name);
}
gst_plugin_feature_list_free(transforms);
done:
if (element)
{
GST_DEBUG("Created %s element %p.", name, element);
}
else
{
gchar *src_str = gst_caps_to_string(src_caps), *sink_str = gst_caps_to_string(sink_caps);
GST_WARNING("Failed to create transform matching caps %s / %s.", src_str, sink_str);
g_free(sink_str);
g_free(src_str);
}
return element;
}
static bool transform_append_element(struct wg_transform *transform, GstElement *element,
GstElement **first, GstElement **last)
{
gchar *name = gst_element_get_name(element);
bool success = false;
if (!gst_bin_add(GST_BIN(transform->container), element) ||
(*last && !gst_element_link(*last, element)))
{
GST_ERROR("Failed to link %s element.", name);
}
else
{
GST_DEBUG("Linked %s element %p.", name, element);
if (!*first)
*first = element;
*last = element;
success = true;
}
g_free(name);
return success;
}
NTSTATUS wg_transform_create(void *args)
{
struct wg_transform_create_params *params = args;
GstCaps *raw_caps = NULL, *src_caps = NULL, *sink_caps = NULL;
struct wg_format output_format = *params->output_format;
struct wg_format input_format = *params->input_format;
GstElement *first = NULL, *last = NULL, *element;
NTSTATUS status = STATUS_UNSUCCESSFUL;
GstPadTemplate *template = NULL;
struct wg_transform *transform;
const gchar *media_type;
GstEvent *event;
if (!init_gstreamer())
return STATUS_UNSUCCESSFUL;
if (!(transform = calloc(1, sizeof(*transform))))
return STATUS_NO_MEMORY;
if (!(transform->container = gst_bin_new("wg_transform")))
goto out;
if (!(src_caps = wg_format_to_caps(&input_format)))
goto out;
if (!(template = gst_pad_template_new("src", GST_PAD_SRC, GST_PAD_ALWAYS, src_caps)))
goto out;
transform->my_src = gst_pad_new_from_template(template, "src");
g_object_unref(template);
if (!transform->my_src)
goto out;
if (!(sink_caps = wg_format_to_caps(&output_format)))
goto out;
if (!(template = gst_pad_template_new("sink", GST_PAD_SINK, GST_PAD_ALWAYS, sink_caps)))
goto out;
transform->my_sink = gst_pad_new_from_template(template, "sink");
g_object_unref(template);
if (!transform->my_sink)
goto out;
gst_pad_set_element_private(transform->my_sink, transform);
gst_pad_set_chain_function(transform->my_sink, transform_sink_chain_cb);
/* Since we append conversion elements, we don't want to filter decoders
* based on the actual output caps now. Matching decoders with the
* raw output media type should be enough.
*/
media_type = gst_structure_get_name(gst_caps_get_structure(sink_caps, 0));
if (!(raw_caps = gst_caps_new_empty_simple(media_type)))
goto out;
switch (input_format.major_type)
{
case WG_MAJOR_TYPE_WMA:
if (!(element = transform_find_element(GST_ELEMENT_FACTORY_TYPE_DECODER, src_caps, raw_caps))
|| !transform_append_element(transform, element, &first, &last))
{
gst_caps_unref(raw_caps);
goto out;
}
break;
case WG_MAJOR_TYPE_AUDIO:
case WG_MAJOR_TYPE_VIDEO:
case WG_MAJOR_TYPE_UNKNOWN:
GST_FIXME("Format %u not implemented!", input_format.major_type);
gst_caps_unref(raw_caps);
goto out;
}
gst_caps_unref(raw_caps);
switch (output_format.major_type)
{
case WG_MAJOR_TYPE_AUDIO:
/* The MF audio decoder transforms allow decoding to various formats
* as well as resampling the audio at the same time, whereas
* GStreamer decoder plugins usually only support decoding to a
* single format and at the original rate.
*
* The WMA decoder transform also has output samples interleaved on
* Windows, whereas GStreamer avdec_wmav2 output uses
* non-interleaved format.
*/
if (!(element = create_element("audioconvert", "base"))
|| !transform_append_element(transform, element, &first, &last))
goto out;
if (!(element = create_element("audioresample", "base"))
|| !transform_append_element(transform, element, &first, &last))
goto out;
break;
case WG_MAJOR_TYPE_VIDEO:
case WG_MAJOR_TYPE_WMA:
case WG_MAJOR_TYPE_UNKNOWN:
GST_FIXME("Format %u not implemented!", output_format.major_type);
goto out;
}
if (!(transform->their_sink = gst_element_get_static_pad(first, "sink")))
goto out;
if (!(transform->their_src = gst_element_get_static_pad(last, "src")))
goto out;
if (gst_pad_link(transform->my_src, transform->their_sink) < 0)
goto out;
if (gst_pad_link(transform->their_src, transform->my_sink) < 0)
goto out;
if (!gst_pad_set_active(transform->my_sink, 1))
goto out;
if (!gst_pad_set_active(transform->my_src, 1))
goto out;
gst_element_set_state(transform->container, GST_STATE_PAUSED);
if (!gst_element_get_state(transform->container, NULL, NULL, -1))
goto out;
if (!(event = gst_event_new_stream_start("stream"))
|| !gst_pad_push_event(transform->my_src, event))
goto out;
if (!(event = gst_event_new_caps(src_caps))
|| !gst_pad_push_event(transform->my_src, event))
goto out;
/* We need to use GST_FORMAT_TIME here because it's the only format
* some elements such avdec_wmav2 correctly support. */
gst_segment_init(&transform->segment, GST_FORMAT_TIME);
transform->segment.start = 0;
transform->segment.stop = -1;
if (!(event = gst_event_new_segment(&transform->segment))
|| !gst_pad_push_event(transform->my_src, event))
goto out;
gst_caps_unref(sink_caps);
gst_caps_unref(src_caps);
GST_INFO("Created winegstreamer transform %p.", transform);
params->transform = transform;
return STATUS_SUCCESS;
out:
if (transform->their_sink)
gst_object_unref(transform->their_sink);
if (transform->their_src)
gst_object_unref(transform->their_src);
if (transform->my_sink)
gst_object_unref(transform->my_sink);
if (sink_caps)
gst_caps_unref(sink_caps);
if (transform->my_src)
gst_object_unref(transform->my_src);
if (src_caps)
gst_caps_unref(src_caps);
if (transform->container)
{
gst_element_set_state(transform->container, GST_STATE_NULL);
gst_object_unref(transform->container);
}
free(transform);
GST_ERROR("Failed to create winegstreamer transform.");
return status;
}
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