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wine/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 "mferror.h"
#include "unix_private.h"
#define GST_SAMPLE_FLAG_WG_CAPS_CHANGED (GST_MINI_OBJECT_FLAG_LAST << 0)
struct wg_transform
{
struct wg_transform_attrs attrs;
GstElement *container;
GstAllocator *allocator;
GstPad *my_src, *my_sink;
GstSegment segment;
GstQuery *drain_query;
GstAtomicQueue *input_queue;
bool input_is_flipped;
GstElement *video_flip;
struct wg_format output_format;
GstAtomicQueue *output_queue;
GstSample *output_sample;
bool output_caps_changed;
GstCaps *output_caps;
};
static struct wg_transform *get_transform(wg_transform_t trans)
{
return (struct wg_transform *)(ULONG_PTR)trans;
}
static void align_video_info_planes(gsize plane_align, GstVideoInfo *info, GstVideoAlignment *align)
{
gst_video_alignment_reset(align);
align->padding_right = ((plane_align + 1) - (info->width & plane_align)) & plane_align;
align->padding_bottom = ((plane_align + 1) - (info->height & plane_align)) & plane_align;
align->stride_align[0] = plane_align;
align->stride_align[1] = plane_align;
align->stride_align[2] = plane_align;
align->stride_align[3] = plane_align;
gst_video_info_align(info, align);
}
static GstFlowReturn transform_sink_chain_cb(GstPad *pad, GstObject *parent, GstBuffer *buffer)
{
struct wg_transform *transform = gst_pad_get_element_private(pad);
GstSample *sample;
GST_LOG("transform %p, buffer %p.", transform, buffer);
if (!(sample = gst_sample_new(buffer, transform->output_caps, NULL, NULL)))
{
GST_ERROR("Failed to allocate transform %p output sample.", transform);
gst_buffer_unref(buffer);
return GST_FLOW_ERROR;
}
if (transform->output_caps_changed)
GST_MINI_OBJECT_FLAG_SET(sample, GST_SAMPLE_FLAG_WG_CAPS_CHANGED);
transform->output_caps_changed = false;
gst_atomic_queue_push(transform->output_queue, sample);
gst_buffer_unref(buffer);
return GST_FLOW_OK;
}
static gboolean transform_src_query_latency(struct wg_transform *transform, GstQuery *query)
{
GST_LOG("transform %p, query %p", transform, query);
gst_query_set_latency(query, transform->attrs.low_latency, 0, 0);
return true;
}
static gboolean transform_src_query_cb(GstPad *pad, GstObject *parent, GstQuery *query)
{
struct wg_transform *transform = gst_pad_get_element_private(pad);
switch (query->type)
{
case GST_QUERY_LATENCY:
return transform_src_query_latency(transform, query);
default:
return gst_pad_query_default(pad, parent, query);
}
}
static gboolean transform_sink_query_cb(GstPad *pad, GstObject *parent, GstQuery *query)
{
struct wg_transform *transform = gst_pad_get_element_private(pad);
GST_LOG("transform %p, type \"%s\".", transform, gst_query_type_get_name(query->type));
switch (query->type)
{
case GST_QUERY_ALLOCATION:
{
gsize plane_align = transform->attrs.output_plane_align;
GstStructure *config, *params;
GstVideoAlignment align;
gboolean needs_pool;
GstBufferPool *pool;
GstVideoInfo info;
GstCaps *caps;
gst_query_parse_allocation(query, &caps, &needs_pool);
if (stream_type_from_caps(caps) != GST_STREAM_TYPE_VIDEO || !needs_pool)
break;
if (!gst_video_info_from_caps(&info, caps)
|| !(pool = gst_video_buffer_pool_new()))
break;
align_video_info_planes(plane_align, &info, &align);
if ((params = gst_structure_new("video-meta",
"padding-top", G_TYPE_UINT, align.padding_top,
"padding-bottom", G_TYPE_UINT, align.padding_bottom,
"padding-left", G_TYPE_UINT, align.padding_left,
"padding-right", G_TYPE_UINT, align.padding_right,
NULL)))
{
gst_query_add_allocation_meta(query, GST_VIDEO_META_API_TYPE, params);
gst_structure_free(params);
}
if (!(config = gst_buffer_pool_get_config(pool)))
GST_ERROR("Failed to get pool %p config.", pool);
else
{
gst_buffer_pool_config_add_option(config, GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_config_add_option(config, GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
gst_buffer_pool_config_set_video_alignment(config, &align);
gst_buffer_pool_config_set_params(config, caps,
info.size, 0, 0);
gst_buffer_pool_config_set_allocator(config, transform->allocator, NULL);
if (!gst_buffer_pool_set_config(pool, config))
GST_ERROR("Failed to set pool %p config.", pool);
}
/* Prevent pool reconfiguration, we don't want another alignment. */
if (!gst_buffer_pool_set_active(pool, true))
GST_ERROR("Pool %p failed to activate.", pool);
gst_query_add_allocation_pool(query, pool, info.size, 0, 0);
gst_query_add_allocation_param(query, transform->allocator, NULL);
GST_INFO("Proposing pool %p, buffer size %#zx, allocator %p, for query %p.",
pool, info.size, transform->allocator, query);
g_object_unref(pool);
return true;
}
case GST_QUERY_CAPS:
{
GstCaps *caps, *filter, *temp;
gchar *str;
gst_query_parse_caps(query, &filter);
if (!(caps = wg_format_to_caps(&transform->output_format)))
break;
if (filter)
{
temp = gst_caps_intersect(caps, filter);
gst_caps_unref(caps);
caps = temp;
}
str = gst_caps_to_string(caps);
GST_INFO("Returning caps %s", str);
g_free(str);
gst_query_set_caps_result(query, caps);
gst_caps_unref(caps);
return true;
}
default:
GST_WARNING("Ignoring \"%s\" query.", gst_query_type_get_name(query->type));
break;
}
return gst_pad_query_default(pad, parent, query);
}
static gboolean transform_sink_event_cb(GstPad *pad, GstObject *parent, GstEvent *event)
{
struct wg_transform *transform = gst_pad_get_element_private(pad);
GST_LOG("transform %p, type \"%s\".", transform, GST_EVENT_TYPE_NAME(event));
switch (event->type)
{
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps(event, &caps);
transform->output_caps_changed = transform->output_caps_changed
|| !gst_caps_is_always_compatible(transform->output_caps, caps);
gst_caps_unref(transform->output_caps);
transform->output_caps = gst_caps_ref(caps);
break;
}
default:
GST_WARNING("Ignoring \"%s\" event.", GST_EVENT_TYPE_NAME(event));
break;
}
gst_event_unref(event);
return TRUE;
}
NTSTATUS wg_transform_destroy(void *args)
{
struct wg_transform *transform = get_transform(*(wg_transform_t *)args);
GstSample *sample;
GstBuffer *buffer;
while ((buffer = gst_atomic_queue_pop(transform->input_queue)))
gst_buffer_unref(buffer);
gst_atomic_queue_unref(transform->input_queue);
gst_element_set_state(transform->container, GST_STATE_NULL);
if (transform->output_sample)
gst_sample_unref(transform->output_sample);
while ((sample = gst_atomic_queue_pop(transform->output_queue)))
gst_sample_unref(sample);
wg_allocator_destroy(transform->allocator);
g_object_unref(transform->container);
g_object_unref(transform->my_sink);
g_object_unref(transform->my_src);
gst_query_unref(transform->drain_query);
gst_caps_unref(transform->output_caps);
gst_atomic_queue_unref(transform->output_queue);
free(transform);
return STATUS_SUCCESS;
}
static bool wg_format_video_is_flipped(const struct wg_format *format)
{
return format->major_type == WG_MAJOR_TYPE_VIDEO && (format->u.video.height < 0);
}
NTSTATUS wg_transform_create(void *args)
{
struct wg_transform_create_params *params = args;
struct wg_format output_format = *params->output_format;
struct wg_format input_format = *params->input_format;
GstElement *first = NULL, *last = NULL, *element;
GstCaps *raw_caps = NULL, *src_caps = NULL;
NTSTATUS status = STATUS_UNSUCCESSFUL;
GstPadTemplate *template = NULL;
struct wg_transform *transform;
const gchar *media_type;
GstEvent *event;
if (!(transform = calloc(1, sizeof(*transform))))
return STATUS_NO_MEMORY;
if (!(transform->container = gst_bin_new("wg_transform")))
goto out;
if (!(transform->input_queue = gst_atomic_queue_new(8)))
goto out;
if (!(transform->output_queue = gst_atomic_queue_new(8)))
goto out;
if (!(transform->drain_query = gst_query_new_drain()))
goto out;
if (!(transform->allocator = wg_allocator_create()))
goto out;
transform->attrs = *params->attrs;
transform->output_format = output_format;
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;
gst_pad_set_element_private(transform->my_src, transform);
gst_pad_set_query_function(transform->my_src, transform_src_query_cb);
if (!(transform->output_caps = wg_format_to_caps(&output_format)))
goto out;
if (!(template = gst_pad_template_new("sink", GST_PAD_SINK, GST_PAD_ALWAYS, transform->output_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_event_function(transform->my_sink, transform_sink_event_cb);
gst_pad_set_query_function(transform->my_sink, transform_sink_query_cb);
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(transform->output_caps, 0));
if (!(raw_caps = gst_caps_new_empty_simple(media_type)))
goto out;
switch (input_format.major_type)
{
case WG_MAJOR_TYPE_VIDEO_H264:
case WG_MAJOR_TYPE_AUDIO_MPEG1:
case WG_MAJOR_TYPE_AUDIO_MPEG4:
case WG_MAJOR_TYPE_AUDIO_WMA:
case WG_MAJOR_TYPE_VIDEO_CINEPAK:
case WG_MAJOR_TYPE_VIDEO_INDEO:
case WG_MAJOR_TYPE_VIDEO_WMV:
if (!(element = find_element(GST_ELEMENT_FACTORY_TYPE_DECODER, src_caps, raw_caps))
|| !append_element(transform->container, element, &first, &last))
{
gst_caps_unref(raw_caps);
goto out;
}
break;
case WG_MAJOR_TYPE_AUDIO:
case WG_MAJOR_TYPE_VIDEO:
break;
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"))
|| !append_element(transform->container, element, &first, &last))
goto out;
if (!(element = create_element("audioresample", "base"))
|| !append_element(transform->container, element, &first, &last))
goto out;
break;
case WG_MAJOR_TYPE_VIDEO:
case WG_MAJOR_TYPE_VIDEO_WMV:
if (!(element = create_element("videoconvert", "base"))
|| !append_element(transform->container, element, &first, &last))
goto out;
if (!(transform->video_flip = create_element("videoflip", "base"))
|| !append_element(transform->container, transform->video_flip, &first, &last))
goto out;
transform->input_is_flipped = wg_format_video_is_flipped(&input_format);
if (transform->input_is_flipped != wg_format_video_is_flipped(&output_format))
gst_util_set_object_arg(G_OBJECT(transform->video_flip), "method", "vertical-flip");
if (!(element = create_element("videoconvert", "base"))
|| !append_element(transform->container, element, &first, &last))
goto out;
/* Let GStreamer choose a default number of threads. */
gst_util_set_object_arg(G_OBJECT(element), "n-threads", "0");
break;
case WG_MAJOR_TYPE_AUDIO_MPEG1:
case WG_MAJOR_TYPE_AUDIO_MPEG4:
case WG_MAJOR_TYPE_AUDIO_WMA:
case WG_MAJOR_TYPE_VIDEO_CINEPAK:
case WG_MAJOR_TYPE_VIDEO_H264:
case WG_MAJOR_TYPE_UNKNOWN:
case WG_MAJOR_TYPE_VIDEO_INDEO:
GST_FIXME("Format %u not implemented!", output_format.major_type);
goto out;
}
if (!link_src_to_element(transform->my_src, first))
goto out;
if (!link_element_to_sink(last, transform->my_sink))
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(src_caps);
GST_INFO("Created winegstreamer transform %p.", transform);
params->transform = (wg_transform_t)(ULONG_PTR)transform;
return STATUS_SUCCESS;
out:
if (transform->my_sink)
gst_object_unref(transform->my_sink);
if (transform->output_caps)
gst_caps_unref(transform->output_caps);
if (transform->my_src)
gst_object_unref(transform->my_src);
if (src_caps)
gst_caps_unref(src_caps);
if (transform->allocator)
wg_allocator_destroy(transform->allocator);
if (transform->drain_query)
gst_query_unref(transform->drain_query);
if (transform->output_queue)
gst_atomic_queue_unref(transform->output_queue);
if (transform->input_queue)
gst_atomic_queue_unref(transform->input_queue);
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;
}
NTSTATUS wg_transform_set_output_format(void *args)
{
struct wg_transform_set_output_format_params *params = args;
struct wg_transform *transform = get_transform(params->transform);
const struct wg_format *format = params->format;
GstSample *sample;
GstCaps *caps;
gchar *str;
if (!(caps = wg_format_to_caps(format)))
{
GST_ERROR("Failed to convert format %p to caps.", format);
return STATUS_UNSUCCESSFUL;
}
transform->output_format = *format;
if (gst_caps_is_always_compatible(transform->output_caps, caps))
{
gst_caps_unref(caps);
return STATUS_SUCCESS;
}
if (!gst_pad_peer_query(transform->my_src, transform->drain_query))
{
GST_ERROR("Failed to drain transform %p.", transform);
return STATUS_UNSUCCESSFUL;
}
gst_caps_unref(transform->output_caps);
transform->output_caps = caps;
if (transform->video_flip)
{
const char *value;
if (transform->input_is_flipped != wg_format_video_is_flipped(format))
value = "vertical-flip";
else
value = "none";
gst_util_set_object_arg(G_OBJECT(transform->video_flip), "method", value);
}
if (!gst_pad_push_event(transform->my_sink, gst_event_new_reconfigure()))
{
GST_ERROR("Failed to reconfigure transform %p.", transform);
return STATUS_UNSUCCESSFUL;
}
str = gst_caps_to_string(caps);
GST_INFO("Configured new caps %s.", str);
g_free(str);
/* Ideally and to be fully compatible with native transform, the queued
* output buffers will need to be converted to the new output format and
* kept queued.
*/
if (transform->output_sample)
gst_sample_unref(transform->output_sample);
while ((sample = gst_atomic_queue_pop(transform->output_queue)))
gst_sample_unref(sample);
transform->output_sample = NULL;
return STATUS_SUCCESS;
}
static void wg_sample_free_notify(void *arg)
{
struct wg_sample *sample = arg;
GST_DEBUG("Releasing wg_sample %p", sample);
InterlockedDecrement(&sample->refcount);
}
NTSTATUS wg_transform_push_data(void *args)
{
struct wg_transform_push_data_params *params = args;
struct wg_transform *transform = get_transform(params->transform);
struct wg_sample *sample = params->sample;
GstBuffer *buffer;
guint length;
length = gst_atomic_queue_length(transform->input_queue);
if (length >= transform->attrs.input_queue_length + 1)
{
GST_INFO("Refusing %u bytes, %u buffers already queued", sample->size, length);
params->result = MF_E_NOTACCEPTING;
return STATUS_SUCCESS;
}
if (!(buffer = gst_buffer_new_wrapped_full(GST_MEMORY_FLAG_READONLY, wg_sample_data(sample), sample->max_size,
0, sample->size, sample, wg_sample_free_notify)))
{
GST_ERROR("Failed to allocate input buffer");
return STATUS_NO_MEMORY;
}
else
{
InterlockedIncrement(&sample->refcount);
GST_INFO("Wrapped %u/%u bytes from sample %p to buffer %p", sample->size, sample->max_size, sample, buffer);
}
if (sample->flags & WG_SAMPLE_FLAG_HAS_PTS)
GST_BUFFER_PTS(buffer) = sample->pts * 100;
if (sample->flags & WG_SAMPLE_FLAG_HAS_DURATION)
GST_BUFFER_DURATION(buffer) = sample->duration * 100;
if (!(sample->flags & WG_SAMPLE_FLAG_SYNC_POINT))
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_FLAG_DELTA_UNIT);
if (sample->flags & WG_SAMPLE_FLAG_DISCONTINUITY)
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_FLAG_DISCONT);
gst_atomic_queue_push(transform->input_queue, buffer);
params->result = S_OK;
return STATUS_SUCCESS;
}
static NTSTATUS copy_video_buffer(GstBuffer *buffer, GstCaps *caps, gsize plane_align,
struct wg_sample *sample, gsize *total_size)
{
NTSTATUS status = STATUS_UNSUCCESSFUL;
GstVideoFrame src_frame, dst_frame;
GstVideoInfo src_info, dst_info;
GstVideoAlignment align;
GstBuffer *dst_buffer;
if (!gst_video_info_from_caps(&src_info, caps))
{
GST_ERROR("Failed to get video info from caps.");
return STATUS_UNSUCCESSFUL;
}
dst_info = src_info;
align_video_info_planes(plane_align, &dst_info, &align);
if (sample->max_size < dst_info.size)
{
GST_ERROR("Output buffer is too small.");
return STATUS_BUFFER_TOO_SMALL;
}
if (!(dst_buffer = gst_buffer_new_wrapped_full(0, wg_sample_data(sample), sample->max_size,
0, sample->max_size, 0, NULL)))
{
GST_ERROR("Failed to wrap wg_sample into GstBuffer");
return STATUS_UNSUCCESSFUL;
}
gst_buffer_set_size(dst_buffer, dst_info.size);
*total_size = sample->size = dst_info.size;
if (!gst_video_frame_map(&src_frame, &src_info, buffer, GST_MAP_READ))
GST_ERROR("Failed to map source frame.");
else
{
if (!gst_video_frame_map(&dst_frame, &dst_info, dst_buffer, GST_MAP_WRITE))
GST_ERROR("Failed to map destination frame.");
else
{
if (gst_video_frame_copy(&dst_frame, &src_frame))
status = STATUS_SUCCESS;
else
GST_ERROR("Failed to copy video frame.");
gst_video_frame_unmap(&dst_frame);
}
gst_video_frame_unmap(&src_frame);
}
gst_buffer_unref(dst_buffer);
return status;
}
static NTSTATUS copy_buffer(GstBuffer *buffer, GstCaps *caps, struct wg_sample *sample,
gsize *total_size)
{
GstMapInfo info;
if (!gst_buffer_map(buffer, &info, GST_MAP_READ))
return STATUS_UNSUCCESSFUL;
if (sample->max_size >= info.size)
sample->size = info.size;
else
{
sample->flags |= WG_SAMPLE_FLAG_INCOMPLETE;
sample->size = sample->max_size;
}
memcpy(wg_sample_data(sample), info.data, sample->size);
gst_buffer_unmap(buffer, &info);
if (sample->flags & WG_SAMPLE_FLAG_INCOMPLETE)
gst_buffer_resize(buffer, sample->size, -1);
*total_size = info.size;
return STATUS_SUCCESS;
}
static NTSTATUS read_transform_output_data(GstBuffer *buffer, GstCaps *caps, gsize plane_align,
struct wg_sample *sample)
{
gsize total_size;
bool needs_copy;
NTSTATUS status;
GstMapInfo info;
if (!gst_buffer_map(buffer, &info, GST_MAP_READ))
{
GST_ERROR("Failed to map buffer %p", buffer);
sample->size = 0;
return STATUS_UNSUCCESSFUL;
}
needs_copy = info.data != wg_sample_data(sample);
total_size = sample->size = info.size;
gst_buffer_unmap(buffer, &info);
if (!needs_copy)
status = STATUS_SUCCESS;
else if (stream_type_from_caps(caps) == GST_STREAM_TYPE_VIDEO)
status = copy_video_buffer(buffer, caps, plane_align, sample, &total_size);
else
status = copy_buffer(buffer, caps, sample, &total_size);
if (status)
{
GST_ERROR("Failed to copy buffer %p", buffer);
sample->size = 0;
return status;
}
if (GST_BUFFER_PTS_IS_VALID(buffer))
{
sample->flags |= WG_SAMPLE_FLAG_HAS_PTS;
sample->pts = GST_BUFFER_PTS(buffer) / 100;
}
if (GST_BUFFER_DURATION_IS_VALID(buffer))
{
GstClockTime duration = GST_BUFFER_DURATION(buffer) / 100;
duration = (duration * sample->size) / total_size;
GST_BUFFER_DURATION(buffer) -= duration * 100;
if (GST_BUFFER_PTS_IS_VALID(buffer))
GST_BUFFER_PTS(buffer) += duration * 100;
sample->flags |= WG_SAMPLE_FLAG_HAS_DURATION;
sample->duration = duration;
}
if (!GST_BUFFER_FLAG_IS_SET(buffer, GST_BUFFER_FLAG_DELTA_UNIT))
sample->flags |= WG_SAMPLE_FLAG_SYNC_POINT;
if (GST_BUFFER_FLAG_IS_SET(buffer, GST_BUFFER_FLAG_DISCONT))
sample->flags |= WG_SAMPLE_FLAG_DISCONTINUITY;
if (needs_copy)
{
if (stream_type_from_caps(caps) == GST_STREAM_TYPE_VIDEO)
GST_WARNING("Copied %u bytes, sample %p, flags %#x", sample->size, sample, sample->flags);
else
GST_INFO("Copied %u bytes, sample %p, flags %#x", sample->size, sample, sample->flags);
}
else if (sample->flags & WG_SAMPLE_FLAG_INCOMPLETE)
GST_ERROR("Partial read %u bytes, sample %p, flags %#x", sample->size, sample, sample->flags);
else
GST_INFO("Read %u bytes, sample %p, flags %#x", sample->size, sample, sample->flags);
return STATUS_SUCCESS;
}
static bool get_transform_output(struct wg_transform *transform, struct wg_sample *sample)
{
GstBuffer *input_buffer;
GstFlowReturn ret;
wg_allocator_provide_sample(transform->allocator, sample);
while (!(transform->output_sample = gst_atomic_queue_pop(transform->output_queue))
&& (input_buffer = gst_atomic_queue_pop(transform->input_queue)))
{
if ((ret = gst_pad_push(transform->my_src, input_buffer)))
GST_WARNING("Failed to push transform input, error %d", ret);
}
/* Remove the sample so the allocator cannot use it */
wg_allocator_provide_sample(transform->allocator, NULL);
return !!transform->output_sample;
}
NTSTATUS wg_transform_read_data(void *args)
{
struct wg_transform_read_data_params *params = args;
struct wg_transform *transform = get_transform(params->transform);
struct wg_sample *sample = params->sample;
struct wg_format *format = params->format;
GstBuffer *output_buffer;
GstCaps *output_caps;
bool discard_data;
NTSTATUS status;
if (!transform->output_sample && !get_transform_output(transform, sample))
{
sample->size = 0;
params->result = MF_E_TRANSFORM_NEED_MORE_INPUT;
GST_INFO("Cannot read %u bytes, no output available", sample->max_size);
wg_allocator_release_sample(transform->allocator, sample, false);
return STATUS_SUCCESS;
}
output_buffer = gst_sample_get_buffer(transform->output_sample);
output_caps = gst_sample_get_caps(transform->output_sample);
if (GST_MINI_OBJECT_FLAG_IS_SET(transform->output_sample, GST_SAMPLE_FLAG_WG_CAPS_CHANGED))
{
GST_MINI_OBJECT_FLAG_UNSET(transform->output_sample, GST_SAMPLE_FLAG_WG_CAPS_CHANGED);
if (format)
{
gsize plane_align = transform->attrs.output_plane_align;
GstVideoAlignment align;
GstVideoInfo info;
wg_format_from_caps(format, output_caps);
if (format->major_type == WG_MAJOR_TYPE_VIDEO
&& gst_video_info_from_caps(&info, output_caps))
{
align_video_info_planes(plane_align, &info, &align);
GST_INFO("Returning video alignment left %u, top %u, right %u, bottom %u.", align.padding_left,
align.padding_top, align.padding_right, align.padding_bottom);
format->u.video.padding.left = align.padding_left;
format->u.video.width += format->u.video.padding.left;
format->u.video.padding.right = align.padding_right;
format->u.video.width += format->u.video.padding.right;
format->u.video.padding.top = align.padding_top;
format->u.video.height += format->u.video.padding.top;
format->u.video.padding.bottom = align.padding_bottom;
format->u.video.height += format->u.video.padding.bottom;
}
}
params->result = MF_E_TRANSFORM_STREAM_CHANGE;
GST_INFO("Format changed detected, returning no output");
wg_allocator_release_sample(transform->allocator, sample, false);
return STATUS_SUCCESS;
}
if ((status = read_transform_output_data(output_buffer, output_caps,
transform->attrs.output_plane_align, sample)))
{
wg_allocator_release_sample(transform->allocator, sample, false);
return status;
}
if (sample->flags & WG_SAMPLE_FLAG_INCOMPLETE)
discard_data = false;
else
{
/* Taint the buffer memory to make sure it cannot be reused by the buffer pool,
* for the pool to always requests new memory from the allocator, and so we can
* then always provide output sample memory to achieve zero-copy.
*
* However, some decoder keep a reference on the buffer they passed downstream,
* to re-use it later. In this case, it will not be possible to do zero-copy,
* and we should copy the data back to the buffer and leave it unchanged.
*
* Some other plugins make assumptions that the returned buffer will always have
* at least one memory attached, we cannot just remove it and need to replace the
* memory instead.
*/
if ((discard_data = gst_buffer_is_writable(output_buffer)))
gst_buffer_replace_all_memory(output_buffer, gst_allocator_alloc(NULL, 0, NULL));
gst_sample_unref(transform->output_sample);
transform->output_sample = NULL;
}
params->result = S_OK;
wg_allocator_release_sample(transform->allocator, sample, discard_data);
return STATUS_SUCCESS;
}
NTSTATUS wg_transform_get_status(void *args)
{
struct wg_transform_get_status_params *params = args;
struct wg_transform *transform = get_transform(params->transform);
params->accepts_input = gst_atomic_queue_length(transform->input_queue) < transform->attrs.input_queue_length + 1;
return STATUS_SUCCESS;
}
NTSTATUS wg_transform_drain(void *args)
{
struct wg_transform *transform = get_transform(*(wg_transform_t *)args);
GstBuffer *input_buffer;
GstFlowReturn ret;
GstEvent *event;
GST_LOG("transform %p", transform);
while ((input_buffer = gst_atomic_queue_pop(transform->input_queue)))
{
if ((ret = gst_pad_push(transform->my_src, input_buffer)))
GST_WARNING("Failed to push transform input, error %d", ret);
}
if (!(event = gst_event_new_segment_done(GST_FORMAT_TIME, -1))
|| !gst_pad_push_event(transform->my_src, event))
goto error;
if (!(event = gst_event_new_eos())
|| !gst_pad_push_event(transform->my_src, event))
goto error;
if (!(event = gst_event_new_stream_start("stream"))
|| !gst_pad_push_event(transform->my_src, event))
goto error;
if (!(event = gst_event_new_segment(&transform->segment))
|| !gst_pad_push_event(transform->my_src, event))
goto error;
return STATUS_SUCCESS;
error:
GST_ERROR("Failed to drain transform %p.", transform);
return STATUS_UNSUCCESSFUL;
}
NTSTATUS wg_transform_flush(void *args)
{
struct wg_transform *transform = get_transform(*(wg_transform_t *)args);
GstBuffer *input_buffer;
GstSample *sample;
NTSTATUS status;
GST_LOG("transform %p", transform);
while ((input_buffer = gst_atomic_queue_pop(transform->input_queue)))
gst_buffer_unref(input_buffer);
if ((status = wg_transform_drain(args)))
return status;
while ((sample = gst_atomic_queue_pop(transform->output_queue)))
gst_sample_unref(sample);
if ((sample = transform->output_sample))
gst_sample_unref(sample);
transform->output_sample = NULL;
return STATUS_SUCCESS;
}
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