/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2020, Collabora Ltd. * Author: Nicolas Dufresne * * gstlibcameraallocator.cpp - GStreamer Custom Allocator */ #include "gstlibcameraallocator.h" #include #include #include #include "gstlibcamera-utils.h" using namespace libcamera; static gboolean gst_libcamera_allocator_release(GstMiniObject *mini_object); /** * \struct FrameWrap * \brief An internal wrapper to track the relation between FrameBuffer and * GstMemory(s) * * This wrapper maintains a count of the outstanding GstMemory (there may be * multiple GstMemory per FrameBuffer), and give back the FrameBuffer to the * allocator pool when all memory objects have returned. */ struct FrameWrap { FrameWrap(GstAllocator *allocator, FrameBuffer *buffer, gpointer stream); ~FrameWrap(); void acquirePlane() { ++outstandingPlanes_; } bool releasePlane() { return --outstandingPlanes_ == 0; } static GQuark getQuark(); gpointer stream_; FrameBuffer *buffer_; std::vector planes_; gint outstandingPlanes_; }; FrameWrap::FrameWrap(GstAllocator *allocator, FrameBuffer *buffer, gpointer stream) : stream_(stream), buffer_(buffer), outstandingPlanes_(0) { for (const FrameBuffer::Plane &plane : buffer->planes()) { GstMemory *mem = gst_fd_allocator_alloc(allocator, plane.fd.fd(), plane.length, GST_FD_MEMORY_FLAG_DONT_CLOSE); gst_mini_object_set_qdata(GST_MINI_OBJECT(mem), getQuark(), this, nullptr); GST_MINI_OBJECT(mem)->dispose = gst_libcamera_allocator_release; g_object_unref(mem->allocator); planes_.push_back(mem); } } FrameWrap::~FrameWrap() { for (GstMemory *mem : planes_) { GST_MINI_OBJECT(mem)->dispose = nullptr; g_object_ref(mem->allocator); gst_memory_unref(mem); } } GQuark FrameWrap::getQuark() { static gsize frame_quark = 0; if (g_once_init_enter(&frame_quark)) { GQuark quark = g_quark_from_string("GstLibcameraFrameWrap"); g_once_init_leave(&frame_quark, quark); } return frame_quark; } /** * \struct _GstLibcameraAllocator * \brief A pooling GstDmaBufAllocator for libcamera * * This is a pooling GstDmaBufAllocator implementation. This implementation override * the dispose function of memory object in order to keep them alive when they * are disposed by downstream elements. */ struct _GstLibcameraAllocator { GstDmaBufAllocator parent; FrameBufferAllocator *fb_allocator; /* * A hash table using Stream pointer as key and returning a GQueue of * FrameWrap. */ GHashTable *pools; }; G_DEFINE_TYPE(GstLibcameraAllocator, gst_libcamera_allocator, GST_TYPE_DMABUF_ALLOCATOR) static gboolean gst_libcamera_allocator_release(GstMiniObject *mini_object) { GstMemory *mem = GST_MEMORY_CAST(mini_object); GstLibcameraAllocator *self = GST_LIBCAMERA_ALLOCATOR(mem->allocator); { GLibLocker lock(GST_OBJECT(self)); auto *frame = reinterpret_cast(gst_mini_object_get_qdata(mini_object, FrameWrap::getQuark())); gst_memory_ref(mem); if (frame->releasePlane()) { auto *pool = reinterpret_cast(g_hash_table_lookup(self->pools, frame->stream_)); g_return_val_if_fail(pool, TRUE); g_queue_push_tail(pool, frame); } } /* Keep last in case we are holding on the last allocator ref. */ g_object_unref(mem->allocator); /* Return FALSE so that our mini object isn't freed. */ return FALSE; } static void gst_libcamera_allocator_free_pool(gpointer data) { GQueue *queue = reinterpret_cast(data); FrameWrap *frame; while ((frame = reinterpret_cast(g_queue_pop_head(queue)))) { g_warn_if_fail(frame->outstandingPlanes_ == 0); delete frame; } g_queue_free(queue); } static void gst_libcamera_allocator_init(GstLibcameraAllocator *self) { self->pools = g_hash_table_new_full(nullptr, nullptr, nullptr, gst_libcamera_allocator_free_pool); GST_OBJECT_FLAG_SET(self, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC); } static void gst_libcamera_allocator_dispose(GObject *object) { GstLibcameraAllocator *self = GST_LIBCAMERA_ALLOCATOR(object); if (self->pools) { g_hash_table_unref(self->pools); self->pools = nullptr; } G_OBJECT_CLASS(gst_libcamera_allocator_parent_class)->dispose(object); } static void gst_libcamera_allocator_finalize(GObject *object) { GstLibcameraAllocator *self = GST_LIBCAMERA_ALLOCATOR(object); delete self->fb_allocator; G_OBJECT_CLASS(gst_libcamera_allocator_parent_class)->finalize(object); } static void gst_libcamera_allocator_class_init(GstLibcameraAllocatorClass *klass) { auto *allocator_class = GST_ALLOCATOR_CLASS(klass); auto *object_class = G_OBJECT_CLASS(klass); object_class->dispose = gst_libcamera_allocator_dispose; object_class->finalize = gst_libcamera_allocator_finalize; allocator_class->alloc = nullptr; } GstLibcameraAllocator * gst_libcamera_allocator_new(std::shared_ptr camera, CameraConfiguration *config_) { auto *self = GST_LIBCAMERA_ALLOCATOR(g_object_new(GST_TYPE_LIBCAMERA_ALLOCATOR, nullptr)); self->fb_allocator = new FrameBufferAllocator(camera); for (StreamConfiguration &streamCfg : *config_) { Stream *stream = streamCfg.stream(); gint ret; ret = self->fb_allocator->allocate(stream); if (ret == 0) return nullptr; GQueue *pool = g_queue_new(); for (const std::unique_ptr &buffer : self->fb_allocator->buffers(stream)) { auto *fb = new FrameWrap(GST_ALLOCATOR(self), buffer.get(), stream); g_queue_push_tail(pool, fb); } g_hash_table_insert(self->pools, stream, pool); } return self; } bool gst_libcamera_allocator_prepare_buffer(GstLibcameraAllocator *self, Stream *stream, GstBuffer *buffer) { GLibLocker lock(GST_OBJECT(self)); auto *pool = reinterpret_cast(g_hash_table_lookup(self->pools, stream)); g_return_val_if_fail(pool, false); auto *frame = reinterpret_cast(g_queue_pop_head(pool)); if (!frame) return false; for (GstMemory *mem : frame->planes_) { frame->acquirePlane(); gst_buffer_append_memory(buffer, mem); g_object_ref(mem->allocator); } return true; } gsize gst_libcamera_allocator_get_pool_size(GstLibcameraAllocator *self, Stream *stream) { GLibLocker lock(GST_OBJECT(self)); auto *pool = reinterpret_cast(g_hash_table_lookup(self->pools, stream)); g_return_val_if_fail(pool, false); return pool->length; } FrameBuffer * gst_libcamera_memory_get_frame_buffer(GstMemory *mem) { auto *frame = reinterpret_cast(gst_mini_object_get_qdata(GST_MINI_OBJECT_CAST(mem), FrameWrap::getQuark())); return frame->buffer_; } ='#n123'>123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * Signal test
 */

#include <iostream>
#include <string.h>

#include <libcamera/base/object.h>
#include <libcamera/base/signal.h>

#include "test.h"

using namespace std;
using namespace libcamera;

static int valueStatic_ = 0;

static void slotStatic(int value)
{
	valueStatic_ = value;
}

static int slotStaticReturn()
{
	return 0;
}

class SlotObject : public Object
{
public:
	void slot()
	{
		valueStatic_ = 1;
	}
};

class BaseClass
{
public:
	/*
	 * A virtual function is required in the base class, otherwise the
	 * compiler will always store Object before BaseClass in memory.
	 */
	virtual ~BaseClass()
	{
	}

	unsigned int data_[32];
};

class SlotMulti : public BaseClass, public Object
{
public:
	void slot()
	{
		valueStatic_ = 1;
	}
};

class SignalTest : public Test
{
protected:
	void slotVoid()
	{
		called_ = true;
	}

	void slotDisconnect()
	{
		called_ = true;
		signalVoid_.disconnect(this, &SignalTest::slotDisconnect);
	}

	void slotInteger1(int value)
	{
		values_[0] = value;
	}

	void slotInteger2(int value)
	{
		values_[1] = value;
	}

	void slotMultiArgs(int value, const std::string &name)
	{
		values_[2] = value;
		name_ = name;
	}

	int slotReturn()
	{
		return 0;
	}

	int init()
	{
		return 0;
	}

	int run()
	{
		/* ----------------- Signal -> !Object tests ---------------- */

		/* Test signal emission and reception. */
		called_ = false;
		signalVoid_.connect(this, &SignalTest::slotVoid);
		signalVoid_.emit();

		if (!called_) {
			cout << "Signal emission test failed" << endl;
			return TestFail;
		}

		/* Test signal with parameters. */
		values_[2] = 0;
		name_.clear();
		signalMultiArgs_.connect(this, &SignalTest::slotMultiArgs);
		signalMultiArgs_.emit(42, "H2G2");

		if (values_[2] != 42 || name_ != "H2G2") {
			cout << "Signal parameters test failed" << endl;
			return TestFail;
		}

		/* Test signal connected to multiple slots. */
		memset(values_, 0, sizeof(values_));
		valueStatic_ = 0;
		signalInt_.connect(this, &SignalTest::slotInteger1);
		signalInt_.connect(this, &SignalTest::slotInteger2);
		signalInt_.connect(&slotStatic);
		signalInt_.emit(42);

		if (values_[0] != 42 || values_[1] != 42 || values_[2] != 0 ||
		    valueStatic_ != 42) {
			cout << "Signal multi slot test failed" << endl;
			return TestFail;
		}

		/* Test disconnection of a single slot. */
		memset(values_, 0, sizeof(values_));
		signalInt_.disconnect(this, &SignalTest::slotInteger2);
		signalInt_.emit(42);

		if (values_[0] != 42 || values_[1] != 0 || values_[2] != 0) {
			cout << "Signal slot disconnection test failed" << endl;
			return TestFail;
		}

		/* Test disconnection of a whole object. */
		memset(values_, 0, sizeof(values_));
		signalInt_.disconnect(this);
		signalInt_.emit(42);

		if (values_[0] != 0 || values_[1] != 0 || values_[2] != 0) {
			cout << "Signal object disconnection test failed" << endl;
			return TestFail;
		}

		/* Test disconnection of a whole signal. */
		memset(values_, 0, sizeof(values_));
		signalInt_.connect(this, &SignalTest::slotInteger1);
		signalInt_.connect(this, &SignalTest::slotInteger2);
		signalInt_.disconnect();
		signalInt_.emit(42);

		if (values_[0] != 0 || values_[1] != 0 || values_[2] != 0) {
			cout << "Signal object disconnection test failed" << endl;
			return TestFail;
		}

		/* Test disconnection from slot. */
		signalVoid_.disconnect();
		signalVoid_.connect(this, &SignalTest::slotDisconnect);

		signalVoid_.emit();
		called_ = false;
		signalVoid_.emit();

		if (called_) {
			cout << "Signal disconnection from slot test failed" << endl;
			return TestFail;
		}

		/*
		 * Test connecting to slots that return a value. This targets
		 * compilation, there's no need to check runtime results.
		 */
		signalVoid_.connect(slotStaticReturn);
		signalVoid_.connect(this, &SignalTest::slotReturn);

		/* Test signal connection to a lambda. */
		int value = 0;
		signalInt_.connect(this, [&](int v) { value = v; });
		signalInt_.emit(42);

		if (value != 42) {
			cout << "Signal connection to lambda failed" << endl;
			return TestFail;
		}

		signalInt_.disconnect(this);