From 2bb0cfbf8137e02cc32aae3b36f85ef7300e8936 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sat, 9 Jun 2018 14:29:41 +0300 Subject: Split UVC gadget into a library and test application Split the project into a UVC gadget library and a test application. To avoid rolling out a custom build system, switch to CMake. Signed-off-by: Laurent Pinchart --- stream.c | 223 --------------------------------------------------------------- 1 file changed, 223 deletions(-) delete mode 100644 stream.c (limited to 'stream.c') diff --git a/stream.c b/stream.c deleted file mode 100644 index 57745aa..0000000 --- a/stream.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * UVC stream handling - * - * Copyright (C) 2010 Ideas on board SPRL - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - */ - -#include -#include -#include - -#include "events.h" -#include "stream.h" -#include "uvc.h" -#include "v4l2.h" -#include "video-buffers.h" -#include "video-source.h" - -/* - * struct uvc_stream - Representation of a UVC stream - * @src: video source - * @uvc: UVC V4L2 output device - * @events: struct events containing event information - */ -struct uvc_stream -{ - struct video_source *src; - struct uvc_device *uvc; - - struct events *events; -}; - -/* --------------------------------------------------------------------------- - * Video streaming - */ - -static void uvc_stream_source_process(void *d, struct video_source *src, - struct video_buffer *buffer) -{ - struct uvc_stream *stream = d; - struct v4l2_device *sink = uvc_v4l2_device(stream->uvc); - - v4l2_queue_buffer(sink, buffer); -} - -static void uvc_stream_uvc_process(void *d) -{ - struct uvc_stream *stream = d; - struct v4l2_device *sink = uvc_v4l2_device(stream->uvc); - struct video_buffer buf; - int ret; - - ret = v4l2_dequeue_buffer(sink, &buf); - if (ret < 0) - return; - - video_source_queue_buffer(stream->src, &buf); -} - -static int uvc_stream_start(struct uvc_stream *stream) -{ - struct v4l2_device *sink = uvc_v4l2_device(stream->uvc); - struct video_buffer_set *buffers = NULL; - int ret; - - printf("Starting video stream.\n"); - - /* Allocate and export the buffers on the source. */ - ret = video_source_alloc_buffers(stream->src, 4); - if (ret < 0) { - printf("Failed to allocate source buffers: %s (%d)\n", - strerror(-ret), -ret); - return ret; - } - - ret = video_source_export_buffers(stream->src, &buffers); - if (ret < 0) { - printf("Failed to export buffers on source: %s (%d)\n", - strerror(-ret), -ret); - goto error_free_source; - } - - /* Allocate and import the buffers on the sink. */ - ret = v4l2_alloc_buffers(sink, V4L2_MEMORY_DMABUF, buffers->nbufs); - if (ret < 0) { - printf("Failed to allocate sink buffers: %s (%d)\n", - strerror(-ret), -ret); - goto error_free_source; - } - - ret = v4l2_import_buffers(sink, buffers); - if (ret < 0) { - printf("Failed to import buffers on sink: %s (%d)\n", - strerror(-ret), -ret); - goto error_free_sink; - } - - /* Start the source and sink. */ - video_source_stream_on(stream->src); - v4l2_stream_on(sink); - - events_watch_fd(stream->events, sink->fd, EVENT_WRITE, - uvc_stream_uvc_process, stream); - - return 0; - -error_free_sink: - v4l2_free_buffers(sink); -error_free_source: - video_source_free_buffers(stream->src); - if (buffers) - video_buffer_set_delete(buffers); - return ret; -} - -static int uvc_stream_stop(struct uvc_stream *stream) -{ - struct v4l2_device *sink = uvc_v4l2_device(stream->uvc); - - printf("Stopping video stream.\n"); - - events_unwatch_fd(stream->events, sink->fd, EVENT_WRITE); - - v4l2_stream_off(sink); - video_source_stream_off(stream->src); - - v4l2_free_buffers(sink); - video_source_free_buffers(stream->src); - - return 0; -} - -void uvc_stream_enable(struct uvc_stream *stream, int enable) -{ - if (enable) - uvc_stream_start(stream); - else - uvc_stream_stop(stream); -} - -int uvc_stream_set_format(struct uvc_stream *stream, - const struct v4l2_pix_format *format) -{ - struct v4l2_pix_format fmt = *format; - int ret; - - printf("Setting format to 0x%08x %ux%u\n", - format->pixelformat, format->width, format->height); - - ret = uvc_set_format(stream->uvc, &fmt); - if (ret < 0) - return ret; - - return video_source_set_format(stream->src, &fmt); -} - -/* --------------------------------------------------------------------------- - * Stream handling - */ - -struct uvc_stream *uvc_stream_new(const char *uvc_device) -{ - struct uvc_stream *stream; - - stream = malloc(sizeof(*stream)); - if (stream == NULL) - return NULL; - - memset(stream, 0, sizeof(*stream)); - - stream->uvc = uvc_open(uvc_device, stream); - if (stream->uvc == NULL) - goto error; - - return stream; - -error: - free(stream); - return NULL; -} - -void uvc_stream_delete(struct uvc_stream *stream) -{ - if (stream == NULL) - return; - - uvc_close(stream->uvc); - - free(stream); -} - -void uvc_stream_init_uvc(struct uvc_stream *stream, - struct uvc_function_config *fc) -{ - uvc_set_config(stream->uvc, fc); - uvc_events_init(stream->uvc, stream->events); -} - -void uvc_stream_set_event_handler(struct uvc_stream *stream, - struct events *events) -{ - stream->events = events; -} - -void uvc_stream_set_video_source(struct uvc_stream *stream, - struct video_source *src) -{ - stream->src = src; - - video_source_set_buffer_handler(src, uvc_stream_source_process, stream); -} -- cgit v1.2.3