Adding upstream version 0.3.65.upstream/0.3.65upstream

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

1 files changed, 469 insertions, 0 deletions

diff --git a/src/examples/local-v4l2.c b/src/examples/local-v4l2.c
new file mode 100644
index 0000000..1d70e9e
--- /dev/null
+++ b/src/examples/local-v4l2.c
@@ -0,0 +1,469 @@
+/* PipeWire
+ *
+ * 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]
+ Using libspa-v4l2
+ [title]
+ */
+
+#include <stdio.h>
+#include <sys/mman.h>
+
+#define WIDTH   640
+#define HEIGHT  480
+#define BPP    3
+#define MAX_BUFFERS	32
+
+#include "sdl.h"
+
+#include <spa/param/video/format-utils.h>
+#include <spa/param/props.h>
+#include <spa/pod/filter.h>
+#include <spa/node/io.h>
+#include <spa/node/utils.h>
+#include <spa/debug/format.h>
+#include <spa/utils/names.h>
+
+#include <pipewire/impl.h>
+
+struct data {
+	SDL_Renderer *renderer;
+	SDL_Window *window;
+	SDL_Texture *texture;
+
+	struct pw_main_loop *loop;
+
+	struct pw_context *context;
+	struct pw_core *core;
+
+	struct spa_port_info info;
+	struct spa_param_info params[4];
+
+	struct spa_node impl_node;
+	struct spa_io_buffers *io;
+
+	struct spa_hook_list hooks;
+
+	struct spa_video_info_raw format;
+	int32_t stride;
+
+	struct spa_buffer *buffers[MAX_BUFFERS];
+	int n_buffers;
+
+	struct pw_proxy *out, *in, *link;
+};
+
+static void handle_events(struct data *data)
+{
+	SDL_Event event;
+	while (SDL_PollEvent(&event)) {
+		switch (event.type) {
+		case SDL_QUIT:
+			pw_main_loop_quit(data->loop);
+			break;
+		}
+	}
+}
+
+static int impl_set_io(void *object, uint32_t id, void *data, size_t size)
+{
+	return 0;
+}
+
+static int impl_send_command(void *object, const struct spa_command *command)
+{
+	return 0;
+}
+
+static int impl_add_listener(void *object,
+		struct spa_hook *listener,
+		const struct spa_node_events *events,
+		void *data)
+{
+	struct data *d = object;
+	struct spa_hook_list save;
+
+	spa_hook_list_isolate(&d->hooks, &save, listener, events, data);
+
+	spa_node_emit_port_info(&d->hooks, SPA_DIRECTION_INPUT, 0, &d->info);
+
+	spa_hook_list_join(&d->hooks, &save);
+
+	return 0;
+}
+
+static int impl_set_callbacks(void *object,
+			      const struct spa_node_callbacks *callbacks, void *data)
+{
+	return 0;
+}
+
+static int impl_port_set_io(void *object, enum spa_direction direction, uint32_t port_id,
+			    uint32_t id, void *data, size_t size)
+{
+	struct data *d = object;
+
+	if (id == SPA_IO_Buffers)
+		d->io = data;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_port_enum_params(void *object, int seq,
+				 enum spa_direction direction, uint32_t port_id,
+				 uint32_t id, uint32_t start, uint32_t num,
+				 const struct spa_pod *filter)
+{
+	struct data *d = object;
+	struct spa_pod *param;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[1024];
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumFormat:
+	{
+		SDL_RendererInfo info;
+
+		if (result.index > 0)
+			return 0;
+
+		SDL_GetRendererInfo(d->renderer, &info);
+		param = sdl_build_formats(&info, &b);
+		break;
+	}
+	case SPA_PARAM_Buffers:
+		if (result.index > 0)
+			return 0;
+
+		param = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamBuffers, id,
+			SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(2, 1, 32),
+			SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(1),
+			SPA_PARAM_BUFFERS_size,    SPA_POD_Int(d->stride * d->format.size.height),
+			SPA_PARAM_BUFFERS_stride,  SPA_POD_Int(d->stride));
+		break;
+
+	case SPA_PARAM_Meta:
+		if (result.index > 0)
+			return 0;
+
+		param = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamMeta, id,
+			SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Header),
+			SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_header)));
+		break;
+
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&d->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int port_set_format(void *object, enum spa_direction direction, uint32_t port_id,
+			   uint32_t flags, const struct spa_pod *format)
+{
+	struct data *d = object;
+	Uint32 sdl_format;
+	void *dest;
+
+	if (format == NULL) {
+		spa_zero(d->format);
+		SDL_DestroyTexture(d->texture);
+		d->texture = NULL;
+	} else {
+		spa_debug_format(0, NULL, format);
+
+		spa_format_video_raw_parse(format, &d->format);
+
+		sdl_format = id_to_sdl_format(d->format.format);
+		if (sdl_format == SDL_PIXELFORMAT_UNKNOWN)
+			return -EINVAL;
+		if (d->format.size.width == 0 ||
+		    d->format.size.height == 0)
+			return -EINVAL;
+
+		d->texture = SDL_CreateTexture(d->renderer,
+					       sdl_format,
+					       SDL_TEXTUREACCESS_STREAMING,
+					       d->format.size.width,
+					       d->format.size.height);
+		SDL_LockTexture(d->texture, NULL, &dest, &d->stride);
+		SDL_UnlockTexture(d->texture);
+	}
+
+	d->info.change_mask = SPA_PORT_CHANGE_MASK_PARAMS;
+	if (format) {
+		d->params[1] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE);
+		d->params[2] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ);
+	} else {
+		d->params[1] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+		d->params[2] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	}
+	spa_node_emit_port_info(&d->hooks, SPA_DIRECTION_INPUT, 0, &d->info);
+
+	return 0;
+}
+
+static int impl_port_set_param(void *object,
+			       enum spa_direction direction, uint32_t port_id,
+			       uint32_t id, uint32_t flags,
+			       const struct spa_pod *param)
+{
+	if (id == SPA_PARAM_Format) {
+		return port_set_format(object, direction, port_id, flags, param);
+	}
+	else
+		return -ENOENT;
+}
+
+static int impl_port_use_buffers(void *object,
+		enum spa_direction direction, uint32_t port_id,
+		uint32_t flags, struct spa_buffer **buffers, uint32_t n_buffers)
+{
+	struct data *d = object;
+	uint32_t i;
+
+	if (n_buffers > MAX_BUFFERS)
+		return -ENOSPC;
+
+	for (i = 0; i < n_buffers; i++)
+		d->buffers[i] = buffers[i];
+	d->n_buffers = n_buffers;
+	return 0;
+}
+
+static int do_render(struct spa_loop *loop, bool async, uint32_t seq,
+		     const void *_data, size_t size, void *user_data)
+{
+	struct data *d = user_data;
+	struct spa_buffer *buf;
+	uint8_t *map;
+	void *sdata, *ddata;
+	int sstride, dstride, ostride;
+	uint32_t i;
+	uint8_t *src, *dst;
+
+	buf = d->buffers[d->io->buffer_id];
+
+	if (buf->datas[0].type == SPA_DATA_MemFd ||
+	    buf->datas[0].type == SPA_DATA_DmaBuf) {
+		map = mmap(NULL, buf->datas[0].maxsize + buf->datas[0].mapoffset, PROT_READ,
+			   MAP_PRIVATE, buf->datas[0].fd, 0);
+		sdata = SPA_PTROFF(map, buf->datas[0].mapoffset, uint8_t);
+	} else if (buf->datas[0].type == SPA_DATA_MemPtr) {
+		map = NULL;
+		sdata = buf->datas[0].data;
+	} else
+		return -EINVAL;
+
+	if (SDL_LockTexture(d->texture, NULL, &ddata, &dstride) < 0) {
+		fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
+		return -EIO;
+	}
+	sstride = buf->datas[0].chunk->stride;
+	ostride = SPA_MIN(sstride, dstride);
+
+	src = sdata;
+	dst = ddata;
+	for (i = 0; i < d->format.size.height; i++) {
+		memcpy(dst, src, ostride);
+		src += sstride;
+		dst += dstride;
+	}
+	SDL_UnlockTexture(d->texture);
+
+	SDL_RenderClear(d->renderer);
+	SDL_RenderCopy(d->renderer, d->texture, NULL, NULL);
+	SDL_RenderPresent(d->renderer);
+
+	if (map)
+		munmap(map, buf->datas[0].maxsize + buf->datas[0].mapoffset);
+
+	return 0;
+}
+
+static int impl_node_process(void *object)
+{
+	struct data *d = object;
+	int res;
+
+	if ((res = pw_loop_invoke(pw_main_loop_get_loop(d->loop), do_render,
+				  SPA_ID_INVALID, NULL, 0, true, d)) < 0)
+		return res;
+
+	handle_events(d);
+
+	d->io->status = SPA_STATUS_NEED_DATA;
+
+	return SPA_STATUS_NEED_DATA;
+}
+
+static const struct spa_node_methods impl_node = {
+	SPA_VERSION_NODE_METHODS,
+	.add_listener = impl_add_listener,
+	.set_callbacks = impl_set_callbacks,
+	.set_io = impl_set_io,
+	.send_command = impl_send_command,
+	.port_set_io = impl_port_set_io,
+	.port_enum_params = impl_port_enum_params,
+	.port_set_param = impl_port_set_param,
+	.port_use_buffers = impl_port_use_buffers,
+	.process = impl_node_process,
+};
+
+static int make_nodes(struct data *data)
+{
+	struct pw_properties *props;
+
+	data->impl_node.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Node,
+			SPA_VERSION_NODE,
+			&impl_node, data);
+
+	data->info = SPA_PORT_INFO_INIT();
+	data->info.change_mask =
+		SPA_PORT_CHANGE_MASK_FLAGS |
+		SPA_PORT_CHANGE_MASK_PARAMS;
+	data->info.flags = 0;
+	data->params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
+	data->params[1] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+	data->params[2] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	data->params[3] = SPA_PARAM_INFO(SPA_PARAM_Meta, SPA_PARAM_INFO_READ);
+	data->info.params = data->params;
+	data->info.n_params = SPA_N_ELEMENTS(data->params);
+
+	data->in = pw_core_export(data->core,
+			SPA_TYPE_INTERFACE_Node,
+			NULL,
+			&data->impl_node,
+			0);
+
+	props = pw_properties_new(
+			SPA_KEY_LIBRARY_NAME, "v4l2/libspa-v4l2",
+			SPA_KEY_FACTORY_NAME, SPA_NAME_API_V4L2_SOURCE,
+			NULL);
+
+	data->out = pw_core_create_object(data->core,
+			"spa-node-factory",
+			PW_TYPE_INTERFACE_Node,
+			PW_VERSION_NODE,
+			&props->dict, 0);
+
+
+	while (true) {
+
+		if (pw_proxy_get_bound_id(data->out) != SPA_ID_INVALID &&
+		    pw_proxy_get_bound_id(data->in) != SPA_ID_INVALID)
+			break;
+
+		pw_loop_iterate(pw_main_loop_get_loop(data->loop), -1);
+	}
+
+	pw_properties_clear(props);
+
+	pw_properties_setf(props,
+			PW_KEY_LINK_OUTPUT_NODE, "%d", pw_proxy_get_bound_id(data->out));
+	pw_properties_setf(props,
+			PW_KEY_LINK_INPUT_NODE, "%d", pw_proxy_get_bound_id(data->in));
+
+	data->link = pw_core_create_object(data->core,
+			"link-factory",
+			PW_TYPE_INTERFACE_Link,
+			PW_VERSION_LINK,
+			&props->dict, 0);
+
+	pw_properties_free(props);
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	struct data data = { 0, };
+
+	pw_init(&argc, &argv);
+
+	data.loop = pw_main_loop_new(NULL);
+	data.context = pw_context_new(
+			pw_main_loop_get_loop(data.loop),
+			pw_properties_new(
+				PW_KEY_CORE_DAEMON, "false",
+				NULL), 0);
+
+	spa_hook_list_init(&data.hooks);
+
+	pw_context_load_module(data.context, "libpipewire-module-spa-node-factory", NULL, NULL);
+	pw_context_load_module(data.context, "libpipewire-module-link-factory", NULL, NULL);
+
+	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+		printf("can't initialize SDL: %s\n", SDL_GetError());
+		return -1;
+	}
+
+	if (SDL_CreateWindowAndRenderer
+	    (WIDTH, HEIGHT, SDL_WINDOW_RESIZABLE, &data.window, &data.renderer)) {
+		printf("can't create window: %s\n", SDL_GetError());
+		return -1;
+	}
+
+	data.core = pw_context_connect_self(data.context, NULL, 0);
+	if (data.core == NULL) {
+		printf("can't connect to core: %m\n");
+		return -1;
+	}
+
+	make_nodes(&data);
+
+	pw_main_loop_run(data.loop);
+
+	pw_proxy_destroy(data.link);
+	pw_proxy_destroy(data.in);
+	pw_proxy_destroy(data.out);
+	pw_context_destroy(data.context);
+	pw_main_loop_destroy(data.loop);
+	pw_deinit();
+
+	return 0;
+}