Adding upstream version 0.3.65.upstream/0.3.65upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 553 insertions, 0 deletions

diff --git a/spa/examples/local-v4l2.c b/spa/examples/local-v4l2.c
new file mode 100644
index 0000000..bd6de7b
--- /dev/null
+++ b/spa/examples/local-v4l2.c
@@ -0,0 +1,553 @@
+/* Spa
+ *
+ * Copyright © 2018 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ [title]
+ Example using libspa-v4l2, with only \ref api_spa
+ [title]
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <dlfcn.h>
+#include <poll.h>
+#include <pthread.h>
+#include <errno.h>
+#include <sys/mman.h>
+
+#include <SDL2/SDL.h>
+
+#include <spa/support/plugin.h>
+#include <spa/utils/names.h>
+#include <spa/utils/result.h>
+#include <spa/utils/string.h>
+#include <spa/support/log-impl.h>
+#include <spa/support/loop.h>
+#include <spa/node/node.h>
+#include <spa/node/io.h>
+#include <spa/node/utils.h>
+#include <spa/param/param.h>
+#include <spa/param/props.h>
+#include <spa/param/video/format-utils.h>
+#include <spa/debug/pod.h>
+
+static SPA_LOG_IMPL(default_log);
+
+#define MAX_BUFFERS     8
+
+struct buffer {
+	struct spa_buffer buffer;
+	struct spa_meta metas[1];
+	struct spa_meta_header header;
+	struct spa_data datas[1];
+	struct spa_chunk chunks[1];
+	SDL_Texture *texture;
+};
+
+struct data {
+	const char *plugin_dir;
+	struct spa_log *log;
+	struct spa_system *system;
+	struct spa_loop *loop;
+	struct spa_loop_control *control;
+
+	struct spa_support support[5];
+	uint32_t n_support;
+
+	struct spa_node *source;
+	struct spa_hook listener;
+	struct spa_io_buffers source_output[1];
+
+	SDL_Renderer *renderer;
+	SDL_Window *window;
+	SDL_Texture *texture;
+
+	bool use_buffer;
+
+	bool running;
+	pthread_t thread;
+
+	struct spa_buffer *bp[MAX_BUFFERS];
+	struct buffer buffers[MAX_BUFFERS];
+	unsigned int n_buffers;
+};
+
+static int load_handle(struct data *data, struct spa_handle **handle, const char *lib, const char *name)
+{
+	int res;
+	void *hnd;
+	spa_handle_factory_enum_func_t enum_func;
+	uint32_t i;
+	char *path = NULL;
+
+	if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
+		return -ENOMEM;
+	}
+	if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
+		printf("can't load %s: %s\n", path, dlerror());
+		free(path);
+		return -ENOENT;
+	}
+	free(path);
+	if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
+		printf("can't find enum function\n");
+		return -ENOENT;
+	}
+
+	for (i = 0;;) {
+		const struct spa_handle_factory *factory;
+
+		if ((res = enum_func(&factory, &i)) <= 0) {
+			if (res != 0)
+				printf("can't enumerate factories: %s\n", spa_strerror(res));
+			break;
+		}
+		if (factory->version < 1)
+			continue;
+		if (!spa_streq(factory->name, name))
+			continue;
+
+		*handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
+		if ((res = spa_handle_factory_init(factory, *handle,
+						NULL, data->support,
+						data->n_support)) < 0) {
+			printf("can't make factory instance: %d\n", res);
+			return res;
+		}
+		return 0;
+	}
+	return -EBADF;
+}
+
+static int make_node(struct data *data, struct spa_node **node, const char *lib, const char *name)
+{
+	struct spa_handle *handle = NULL;
+	void *iface;
+	int res;
+
+	if ((res = load_handle(data, &handle, lib, name)) < 0)
+		return res;
+
+	if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Node, &iface)) < 0) {
+		printf("can't get interface %d\n", res);
+		return res;
+	}
+	*node = iface;
+	return 0;
+}
+
+static int on_source_ready(void *_data, int status)
+{
+	struct data *data = _data;
+	int res;
+	struct buffer *b;
+	void *sdata, *ddata;
+	int sstride, dstride;
+	int i;
+	uint8_t *src, *dst;
+	struct spa_data *datas;
+	struct spa_io_buffers *io = &data->source_output[0];
+
+	if (io->status != SPA_STATUS_HAVE_DATA ||
+	    io->buffer_id >= MAX_BUFFERS)
+		return -EINVAL;
+
+	b = &data->buffers[io->buffer_id];
+	io->status = SPA_STATUS_NEED_DATA;
+
+	datas = b->buffer.datas;
+
+	if (b->texture) {
+		SDL_Texture *texture = b->texture;
+
+		SDL_UnlockTexture(texture);
+
+		SDL_RenderClear(data->renderer);
+		SDL_RenderCopy(data->renderer, texture, NULL, NULL);
+		SDL_RenderPresent(data->renderer);
+
+		if (SDL_LockTexture(texture, NULL, &sdata, &sstride) < 0) {
+			fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
+			return -EIO;
+		}
+	} else {
+		uint8_t *map;
+
+		if (SDL_LockTexture(data->texture, NULL, &ddata, &dstride) < 0) {
+			fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
+			return -EIO;
+		}
+		sdata = datas[0].data;
+		if (datas[0].type == SPA_DATA_MemFd ||
+		    datas[0].type == SPA_DATA_DmaBuf) {
+			map = mmap(NULL, datas[0].maxsize + datas[0].mapoffset, PROT_READ,
+				   MAP_PRIVATE, datas[0].fd, 0);
+			if (map == MAP_FAILED)
+				return -errno;
+			sdata = SPA_PTROFF(map, datas[0].mapoffset, uint8_t);
+		} else if (datas[0].type == SPA_DATA_MemPtr) {
+			map = NULL;
+			sdata = datas[0].data;
+		} else
+			return -EIO;
+
+		sstride = datas[0].chunk->stride;
+
+		for (i = 0; i < 240; i++) {
+			src = ((uint8_t *) sdata + i * sstride);
+			dst = ((uint8_t *) ddata + i * dstride);
+			memcpy(dst, src, SPA_MIN(sstride, dstride));
+		}
+		SDL_UnlockTexture(data->texture);
+
+		SDL_RenderClear(data->renderer);
+		SDL_RenderCopy(data->renderer, data->texture, NULL, NULL);
+		SDL_RenderPresent(data->renderer);
+
+		if (map)
+			munmap(map, datas[0].maxsize + datas[0].mapoffset);
+	}
+
+	if ((res = spa_node_process(data->source)) < 0)
+		printf("got process error %d\n", res);
+
+	return 0;
+}
+
+static const struct spa_node_callbacks source_callbacks = {
+	SPA_VERSION_NODE_CALLBACKS,
+	.ready = on_source_ready,
+};
+
+static int make_nodes(struct data *data, const char *device)
+{
+	int res;
+	struct spa_pod *props;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[256];
+	uint32_t index;
+
+	if ((res =
+	     make_node(data, &data->source,
+		     "v4l2/libspa-v4l2.so",
+		     SPA_NAME_API_V4L2_SOURCE)) < 0) {
+		printf("can't create v4l2-source: %d\n", res);
+		return res;
+	}
+
+	spa_node_set_callbacks(data->source, &source_callbacks, data);
+
+	index = 0;
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+	if ((res = spa_node_enum_params_sync(data->source, SPA_PARAM_Props,
+			&index, NULL, &props, &b)) == 1) {
+		spa_debug_pod(0, NULL, props);
+	}
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+	props = spa_pod_builder_add_object(&b,
+		SPA_TYPE_OBJECT_Props, 0,
+		SPA_PROP_device, SPA_POD_String(device ? device : "/dev/video0"));
+
+	if ((res = spa_node_set_param(data->source, SPA_PARAM_Props, 0, props)) < 0)
+		printf("got set_props error %d\n", res);
+
+	return res;
+}
+
+static int setup_buffers(struct data *data)
+{
+	int i;
+
+	for (i = 0; i < MAX_BUFFERS; i++) {
+		struct buffer *b = &data->buffers[i];
+
+		data->bp[i] = &b->buffer;
+
+		b->texture = NULL;
+
+		b->buffer.metas = b->metas;
+		b->buffer.n_metas = 1;
+		b->buffer.datas = b->datas;
+		b->buffer.n_datas = 1;
+
+		b->header.flags = 0;
+		b->header.seq = 0;
+		b->header.pts = 0;
+		b->header.dts_offset = 0;
+		b->metas[0].type = SPA_META_Header;
+		b->metas[0].data = &b->header;
+		b->metas[0].size = sizeof(b->header);
+
+		b->datas[0].type = 0;
+		b->datas[0].flags = 0;
+		b->datas[0].fd = -1;
+		b->datas[0].mapoffset = 0;
+		b->datas[0].maxsize = 0;
+		b->datas[0].data = NULL;
+		b->datas[0].chunk = &b->chunks[0];
+		b->datas[0].chunk->offset = 0;
+		b->datas[0].chunk->size = 0;
+		b->datas[0].chunk->stride = 0;
+	}
+	data->n_buffers = MAX_BUFFERS;
+	return 0;
+}
+
+static int sdl_alloc_buffers(struct data *data)
+{
+	int i;
+
+	for (i = 0; i < MAX_BUFFERS; i++) {
+		struct buffer *b = &data->buffers[i];
+		SDL_Texture *texture;
+		void *ptr;
+		int stride;
+
+		texture = SDL_CreateTexture(data->renderer,
+					    SDL_PIXELFORMAT_YUY2,
+					    SDL_TEXTUREACCESS_STREAMING, 320, 240);
+		if (!texture) {
+			printf("can't create texture: %s\n", SDL_GetError());
+			return -ENOMEM;
+		}
+		if (SDL_LockTexture(texture, NULL, &ptr, &stride) < 0) {
+			fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
+			return -EIO;
+		}
+		b->texture = texture;
+
+		b->datas[0].type = SPA_DATA_MemPtr;
+		b->datas[0].maxsize = stride * 240;
+		b->datas[0].data = ptr;
+		b->datas[0].chunk->offset = 0;
+		b->datas[0].chunk->size = stride * 240;
+		b->datas[0].chunk->stride = stride;
+	}
+	return 0;
+}
+
+static int negotiate_formats(struct data *data)
+{
+	int res;
+	struct spa_pod *format;
+	uint8_t buffer[256];
+	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
+
+	data->source_output[0] = SPA_IO_BUFFERS_INIT;
+
+	if ((res =
+	     spa_node_port_set_io(data->source,
+				  SPA_DIRECTION_OUTPUT, 0,
+				  SPA_IO_Buffers,
+				  &data->source_output[0], sizeof(data->source_output[0]))) < 0)
+		return res;
+
+	format = spa_format_video_raw_build(&b, 0,
+			&SPA_VIDEO_INFO_RAW_INIT(
+				.format =  SPA_VIDEO_FORMAT_YUY2,
+				.size = SPA_RECTANGLE(320, 240),
+				.framerate = SPA_FRACTION(25,1)));
+
+	if ((res = spa_node_port_set_param(data->source,
+					   SPA_DIRECTION_OUTPUT, 0,
+					   SPA_PARAM_Format, 0,
+					   format)) < 0)
+		return res;
+
+
+	setup_buffers(data);
+
+	if (data->use_buffer) {
+		if ((res = sdl_alloc_buffers(data)) < 0)
+			return res;
+
+		if ((res = spa_node_port_use_buffers(data->source,
+						SPA_DIRECTION_OUTPUT, 0, 0,
+						data->bp, data->n_buffers)) < 0) {
+			printf("can't allocate buffers: %s\n", spa_strerror(res));
+			return -1;
+		}
+	} else {
+		unsigned int n_buffers;
+
+		data->texture = SDL_CreateTexture(data->renderer,
+						  SDL_PIXELFORMAT_YUY2,
+						  SDL_TEXTUREACCESS_STREAMING, 320, 240);
+		if (!data->texture) {
+			printf("can't create texture: %s\n", SDL_GetError());
+			return -1;
+		}
+		n_buffers = MAX_BUFFERS;
+		if ((res = spa_node_port_use_buffers(data->source,
+						SPA_DIRECTION_OUTPUT, 0,
+						SPA_NODE_BUFFERS_FLAG_ALLOC,
+						data->bp, n_buffers)) < 0) {
+			printf("can't allocate buffers: %s\n", spa_strerror(res));
+			return -1;
+		}
+		data->n_buffers = n_buffers;
+	}
+	return 0;
+}
+
+static void *loop(void *user_data)
+{
+	struct data *data = user_data;
+
+	printf("enter thread\n");
+        spa_loop_control_enter(data->control);
+
+	while (data->running) {
+		spa_loop_control_iterate(data->control, -1);
+	}
+
+	printf("leave thread\n");
+        spa_loop_control_leave(data->control);
+	return NULL;
+}
+
+static void run_async_source(struct data *data)
+{
+	int res, err;
+	struct spa_command cmd;
+	SDL_Event event;
+	bool running = true;
+
+	cmd = SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Start);
+	if ((res = spa_node_send_command(data->source, &cmd)) < 0)
+		printf("got error %d\n", res);
+
+	spa_loop_control_leave(data->control);
+
+	data->running = true;
+	if ((err = pthread_create(&data->thread, NULL, loop, data)) != 0) {
+		printf("can't create thread: %d %s", err, strerror(err));
+		data->running = false;
+	}
+
+	while (running && SDL_WaitEvent(&event)) {
+		switch (event.type) {
+		case SDL_QUIT:
+			running = false;
+			break;
+		}
+	}
+
+	if (data->running) {
+		data->running = false;
+		pthread_join(data->thread, NULL);
+	}
+
+	spa_loop_control_enter(data->control);
+
+	cmd = SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Pause);
+	if ((res = spa_node_send_command(data->source, &cmd)) < 0)
+		printf("got error %d\n", res);
+}
+
+int main(int argc, char *argv[])
+{
+	struct data data = { 0 };
+	int res;
+	const char *str;
+	struct spa_handle *handle = NULL;
+	void *iface;
+
+	if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
+		str = PLUGINDIR;
+	data.plugin_dir = str;
+
+	if ((res = load_handle(&data, &handle,
+					"support/libspa-support.so",
+					SPA_NAME_SUPPORT_SYSTEM)) < 0)
+		return res;
+
+	if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_System, &iface)) < 0) {
+		printf("can't get System interface %d\n", res);
+		return res;
+	}
+	data.system = iface;
+	data.support[data.n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_System, data.system);
+
+	if ((res = load_handle(&data, &handle,
+					"support/libspa-support.so",
+					SPA_NAME_SUPPORT_LOOP)) < 0)
+		return res;
+
+	if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Loop, &iface)) < 0) {
+		printf("can't get interface %d\n", res);
+		return res;
+	}
+	data.loop = iface;
+	if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_LoopControl, &iface)) < 0) {
+		printf("can't get interface %d\n", res);
+		return res;
+	}
+	data.control = iface;
+
+	data.use_buffer = true;
+
+	data.log = &default_log.log;
+
+	if ((str = getenv("SPA_DEBUG")))
+		data.log->level = atoi(str);
+
+	data.support[data.n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Log, data.log);
+	data.support[data.n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Loop, data.loop);
+	data.support[data.n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_DataLoop, data.loop);
+
+	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+		printf("can't initialize SDL: %s\n", SDL_GetError());
+		return -1;
+	}
+
+	if (SDL_CreateWindowAndRenderer
+	    (320, 240, SDL_WINDOW_RESIZABLE, &data.window, &data.renderer)) {
+		printf("can't create window: %s\n", SDL_GetError());
+		return -1;
+	}
+
+
+	if ((res = make_nodes(&data, argv[1])) < 0) {
+		printf("can't make nodes: %d\n", res);
+		return -1;
+	}
+	if ((res = negotiate_formats(&data)) < 0) {
+		printf("can't negotiate nodes: %d\n", res);
+		return -1;
+	}
+
+	spa_loop_control_enter(data.control);
+	run_async_source(&data);
+	spa_loop_control_leave(data.control);
+
+	SDL_DestroyRenderer(data.renderer);
+
+	return 0;
+}