Adding upstream version 0.3.65.upstream/0.3.65upstream

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

1 files changed, 141 insertions, 0 deletions

diff --git a/doc/tutorial5.c b/doc/tutorial5.c
new file mode 100644
index 0000000..e49da91
--- /dev/null
+++ b/doc/tutorial5.c
@@ -0,0 +1,141 @@
+/*
+  [title]
+  \ref page_tutorial5
+  [title]
+ */
+/* [code] */
+#include <spa/param/video/format-utils.h>
+#include <spa/debug/types.h>
+#include <spa/param/video/type-info.h>
+
+#include <pipewire/pipewire.h>
+
+struct data {
+	struct pw_main_loop *loop;
+	struct pw_stream *stream;
+
+	struct spa_video_info format;
+};
+
+/* [on_process] */
+static void on_process(void *userdata)
+{
+	struct data *data = userdata;
+	struct pw_buffer *b;
+	struct spa_buffer *buf;
+
+	if ((b = pw_stream_dequeue_buffer(data->stream)) == NULL) {
+		pw_log_warn("out of buffers: %m");
+		return;
+	}
+
+	buf = b->buffer;
+	if (buf->datas[0].data == NULL)
+		return;
+
+	/** copy frame data to screen */
+	printf("got a frame of size %d\n", buf->datas[0].chunk->size);
+
+	pw_stream_queue_buffer(data->stream, b);
+}
+/* [on_process] */
+
+static void on_param_changed(void *userdata, uint32_t id, const struct spa_pod *param)
+{
+	struct data *data = userdata;
+
+	if (param == NULL || id != SPA_PARAM_Format)
+		return;
+
+	if (spa_format_parse(param,
+			&data->format.media_type,
+			&data->format.media_subtype) < 0)
+		return;
+
+	if (data->format.media_type != SPA_MEDIA_TYPE_video ||
+	    data->format.media_subtype != SPA_MEDIA_SUBTYPE_raw)
+		return;
+
+	if (spa_format_video_raw_parse(param, &data->format.info.raw) < 0)
+		return;
+
+	printf("got video format:\n");
+	printf("  format: %d (%s)\n", data->format.info.raw.format,
+			spa_debug_type_find_name(spa_type_video_format,
+				data->format.info.raw.format));
+	printf("  size: %dx%d\n", data->format.info.raw.size.width,
+			data->format.info.raw.size.height);
+	printf("  framerate: %d/%d\n", data->format.info.raw.framerate.num,
+			data->format.info.raw.framerate.denom);
+
+	/** prepare to render video of this size */
+}
+
+static const struct pw_stream_events stream_events = {
+	PW_VERSION_STREAM_EVENTS,
+	.param_changed = on_param_changed,
+	.process = on_process,
+};
+
+int main(int argc, char *argv[])
+{
+	struct data data = { 0, };
+	const struct spa_pod *params[1];
+	uint8_t buffer[1024];
+	struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
+	struct pw_properties *props;
+
+	pw_init(&argc, &argv);
+
+	data.loop = pw_main_loop_new(NULL);
+
+	props = pw_properties_new(PW_KEY_MEDIA_TYPE, "Video",
+			PW_KEY_MEDIA_CATEGORY, "Capture",
+			PW_KEY_MEDIA_ROLE, "Camera",
+			NULL);
+	if (argc > 1)
+		pw_properties_set(props, PW_KEY_TARGET_OBJECT, argv[1]);
+
+	data.stream = pw_stream_new_simple(
+			pw_main_loop_get_loop(data.loop),
+			"video-capture",
+			props,
+			&stream_events,
+			&data);
+
+	params[0] = spa_pod_builder_add_object(&b,
+		SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
+		SPA_FORMAT_mediaType,       SPA_POD_Id(SPA_MEDIA_TYPE_video),
+		SPA_FORMAT_mediaSubtype,    SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw),
+		SPA_FORMAT_VIDEO_format,    SPA_POD_CHOICE_ENUM_Id(7,
+						SPA_VIDEO_FORMAT_RGB,
+						SPA_VIDEO_FORMAT_RGB,
+						SPA_VIDEO_FORMAT_RGBA,
+						SPA_VIDEO_FORMAT_RGBx,
+						SPA_VIDEO_FORMAT_BGRx,
+						SPA_VIDEO_FORMAT_YUY2,
+						SPA_VIDEO_FORMAT_I420),
+		SPA_FORMAT_VIDEO_size,      SPA_POD_CHOICE_RANGE_Rectangle(
+						&SPA_RECTANGLE(320, 240),
+						&SPA_RECTANGLE(1, 1),
+						&SPA_RECTANGLE(4096, 4096)),
+		SPA_FORMAT_VIDEO_framerate, SPA_POD_CHOICE_RANGE_Fraction(
+						&SPA_FRACTION(25, 1),
+						&SPA_FRACTION(0, 1),
+						&SPA_FRACTION(1000, 1)));
+
+	pw_stream_connect(data.stream,
+			  PW_DIRECTION_INPUT,
+			  PW_ID_ANY,
+			  PW_STREAM_FLAG_AUTOCONNECT |
+			  PW_STREAM_FLAG_MAP_BUFFERS,
+			  params, 1);
+
+	pw_main_loop_run(data.loop);
+
+	pw_stream_destroy(data.stream);
+	pw_main_loop_destroy(data.loop);
+
+	return 0;
+}
+/* [code] */