This is an example application for testing the S3C/S5P rotator device. It uses framebuffer memory for its source and destination buffers, as the device requires them to be in contiguous memory. Source image is read from a file passed as an argument and saved to another file, which name is also passed as an argument.
Configurable parameters: video_node in_file, out_file, format, width, height, rotation, flip Where: video_node: video node number in_file/out_file: source/destination raw image data format: 0: 420, 1: 422, 2: 565, 3: 888 width/height: dimensions of both images rotation: 90, 180, 270 flip (when rotation==0): 1: horizontal, 2: vertical --- --- /dev/null 2009-11-17 07:51:25.574927259 +0100 +++ rotator-dma-contig.c 2009-12-22 17:22:25.000000000 +0100 @@ -0,0 +1,375 @@ +/* + * Samsung S3C/S5P image rotator test application. + * + * Copyright (c) 2009 Samsung Electronics Co., Ltd. + * Pawel Osciak, <p.osc...@samsung.com> + * + * 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 + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <errno.h> +#include <time.h> + +#include <fcntl.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <stdint.h> + +#include <linux/fb.h> +#include <linux/videodev2.h> + +#define VIDEO_DEV_NAME "/dev/video" +#define FB_DEV_NAME "/dev/fb0" + +#define NUM_SRC_BUFS 1 +#define NUM_DST_BUFS 1 + +#define V4L2_CID_PRIVATE_ROTATE (V4L2_CID_PRIVATE_BASE + 0) + +#define perror_exit(cond, func)\ + if (cond) {\ + fprintf(stderr, "%s:%d: ", __func__, __LINE__);\ + perror(func);\ + exit(EXIT_FAILURE);\ + } + +#define error_exit(cond, msg)\ + if (cond) {\ + fprintf(stderr, "%s:%d: " msg "\n", __func__, __LINE__);\ + exit(EXIT_FAILURE);\ + } + +#define perror_ret(cond, func)\ + if (cond) {\ + fprintf(stderr, "%s:%d: ", __func__, __LINE__);\ + perror(func);\ + return ret;\ + } + +#define memzero(x)\ + memset(&(x), 0, sizeof (x)); + +#ifdef _DEBUG +#define debug(msg, ...)\ + fprintf(stderr, "%s: " msg, __func__, ##__VA_ARGS__); +#else +#define debug(msg, ...) +#endif + +struct buffer { + char *addr; + unsigned long size; + unsigned int index; +}; + +static int vid_fd, fb_fd, src_fd, dst_fd; +static void *fb_addr, *src_addr, *dst_addr; +static char *in_file, *out_file; +static int width, height; +static off_t fb_line_w, fb_buf_w, fb_size; +static struct fb_var_screeninfo fbinfo; +static int in_size; +static int vid_node = 0; +static int format, framesize, rotation, flip; + +static void set_rotation(int angle) +{ + struct v4l2_control ctrl; + int ret; + + memzero(ctrl); + ctrl.id = V4L2_CID_PRIVATE_ROTATE; + ctrl.value = angle; + ret = ioctl(vid_fd, VIDIOC_S_CTRL, &ctrl); + perror_exit(ret != 0, "ioctl"); +} + +static void set_flip(int flip) +{ + struct v4l2_control ctrl; + int ret; + + memzero(ctrl); + switch (flip) { + case 1: + ctrl.id = V4L2_CID_HFLIP; + break; + case 2: + ctrl.id = V4L2_CID_VFLIP; + break; + default: + error_exit(1, "Invalid params\n"); + } + + ctrl.value = 1; + + ret = ioctl(vid_fd, VIDIOC_S_CTRL, &ctrl); + perror_exit(ret != 0, "ioctl"); +} + +static void set_fmt(uint32_t format) +{ + struct v4l2_format fmt; + int ret; + long page_size; + + memzero(fmt); + switch (format) { + case 0: + fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; + framesize = width * height * 2; + fb_buf_w = width * 2; + break; + case 1: + fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; + framesize = (width * height * 3) / 2; + fb_buf_w = width * 3 / 2; + break; + case 2: + fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB565X; + framesize = width * height * 2; + fb_buf_w = width * 2; + break; + case 3: + fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR32; + framesize = width * height * 4; + fb_buf_w = width * 4; + break; + default: + error_exit(1, "Invalid params\n"); + break; + } + + page_size = sysconf(_SC_PAGESIZE); + framesize = (framesize + page_size - 1) & ~(page_size - 1); + debug("Framesize: %d\n", framesize); + + /* Set format for capture */ + fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + fmt.fmt.pix.width = width; + fmt.fmt.pix.height = height; + fmt.fmt.pix.field = V4L2_FIELD_ANY; + + ret = ioctl(vid_fd, VIDIOC_S_FMT, &fmt); + perror_exit(ret != 0, "ioctl"); + + /* The same format for output */ + fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + fmt.fmt.pix.width = width; + fmt.fmt.pix.height = height; + fmt.fmt.pix.field = V4L2_FIELD_ANY; + + ret = ioctl(vid_fd, VIDIOC_S_FMT, &fmt); + perror_exit(ret != 0, "ioctl"); +} + + +static void verify_caps(void) +{ + struct v4l2_capability cap; + int ret; + + memzero(cap); + ret = ioctl(vid_fd, VIDIOC_QUERYCAP, &cap); + perror_exit(ret != 0, "ioctl"); + + if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) + error_exit(1, "Device does not support capture\n"); + + if (!(cap.capabilities & V4L2_CAP_VIDEO_OUTPUT)) + error_exit(1, "Device does not support output\n"); + + if (!(cap.capabilities & V4L2_CAP_STREAMING)) + error_exit(1, "Device does not support streaming\n"); +} + +static void init_video_dev(void) +{ + char devname[64]; + + snprintf(devname, 64, "%s%d", VIDEO_DEV_NAME, vid_node); + vid_fd = open(devname, O_RDWR | O_NONBLOCK, 0); + perror_exit(vid_fd < 0, "open"); + + verify_caps(); +} + +void init_fb(void) +{ + int ret; + + fb_fd = open(FB_DEV_NAME, O_RDWR); + perror_exit(fb_fd < 0, "open"); + + ret = ioctl(fb_fd, FBIOGET_VSCREENINFO, &fbinfo); + perror_exit(ret != 0, "ioctl"); + debug("fbinfo: xres: %d, xres_virt: %d, yres: %d, yres_virt: %d\n", + fbinfo.xres, fbinfo.xres_virtual, + fbinfo.yres, fbinfo.yres_virtual); + + fb_line_w = fbinfo.xres_virtual * (fbinfo.bits_per_pixel >> 3); + debug("fb_buf_w: %d, fb_line_w: %d\n", fb_buf_w, fb_line_w); + fb_size = fb_line_w * fbinfo.yres_virtual; + + fb_addr = mmap(0, fb_size, PROT_WRITE | PROT_READ, + MAP_SHARED, fb_fd, 0); + perror_exit(fb_addr == MAP_FAILED, "mmap"); +} + +static void parse_args(int argc, char *argv[]) +{ + if (argc != 9) { + fprintf(stderr, "Usage: " + "%s video_node in_file, out_file, format, width, " + "height, rotation, flip\n" + "rotations: 90, 180, 270;\n" + "flip (when rotation==0): 1 - horiz, 2 - vert\n" + "formats: 0: 420, 1: 422, 2: 565, 3: 888\n", + argv[0]); + error_exit(1, "Invalid number of arguments\n"); + } + + vid_node = atoi(argv[1]); + in_file = argv[2]; + out_file = argv[3]; + format = atoi(argv[4]); + width = atoi(argv[5]); + height = atoi(argv[6]); + rotation = atoi(argv[7]); + flip = atoi(argv[8]); +} + +static void get_buffer(struct buffer *buf, unsigned int i) +{ + if ((i+1) * framesize > fb_size) + error_exit(1, "Framebuffer memory won't fit in the buffer\n"); + + buf->addr = fb_addr + i * framesize; + buf->size = framesize; +} + +static void request_buffers(unsigned int *num_src_bufs, + unsigned int *num_dst_bufs) +{ + struct v4l2_requestbuffers reqbuf; + int ret; + + memzero(reqbuf); + reqbuf.count = *num_src_bufs; + reqbuf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + reqbuf.memory = V4L2_MEMORY_USERPTR; + ret = ioctl(vid_fd, VIDIOC_REQBUFS, &reqbuf); + perror_exit(ret != 0, "ioctl"); + *num_src_bufs = reqbuf.count; + + + reqbuf.count = *num_dst_bufs; + reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + ret = ioctl(vid_fd, VIDIOC_REQBUFS, &reqbuf); + perror_exit(ret != 0, "ioctl"); + *num_dst_bufs = reqbuf.count; +} + +static int process(struct buffer *src_buf, struct buffer *dst_buf) +{ + struct v4l2_buffer buf; + enum v4l2_buf_type type; + fd_set read_fds; + int r; + int ret; + + memzero(buf); + buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + buf.memory = V4L2_MEMORY_USERPTR; + buf.index = src_buf->index; + buf.m.userptr = (unsigned long)src_buf->addr; + buf.length = src_buf->size; + type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + ret = ioctl(vid_fd, VIDIOC_QBUF, &buf); + perror_ret(ret, "ioctl"); + + buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + buf.index = dst_buf->index; + buf.m.userptr = (unsigned long)dst_buf->addr; + buf.length = dst_buf->size; + type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + ret = ioctl(vid_fd, VIDIOC_QBUF, &buf); + perror_ret(ret, "ioctl"); + + ret = ioctl(vid_fd, VIDIOC_STREAMON, &type); + perror_ret(ret, "ioctl"); + + FD_ZERO(&read_fds); + FD_SET(vid_fd, &read_fds); + r = select(vid_fd + 1, &read_fds, NULL, NULL, 0); + perror_ret(ret, "ioctl"); + + ret = ioctl(vid_fd, VIDIOC_STREAMOFF, &type); + perror_ret(ret, "ioctl"); + + return 0; +} + +/* Usage: video_node in_file, out_file, format, width, height, rotation, flip + * rotations: 90, 180, 270; flip (when rotation==0): 1 - horiz, 2 - vert + * formats: 0: 420, 1: 422, 2: 565, 3: 888 */ +int main(int argc, char *argv[]) +{ + struct stat in_stat; + struct buffer src_buffer; + struct buffer dst_buffer; + int ret = 0; + unsigned int num_src_buffers = NUM_SRC_BUFS; + unsigned int num_dst_buffers = NUM_DST_BUFS; + + parse_args(argc, argv); + + src_fd = open(in_file, O_RDONLY); + perror_exit(src_fd < 0, in_file); + fstat(src_fd, &in_stat); + in_size = in_stat.st_size; + src_addr = mmap(0, in_size, PROT_READ, MAP_SHARED, src_fd, 0); + perror_exit(src_addr == MAP_FAILED, "mmap"); + + init_fb(); + + dst_fd = open(out_file, O_RDWR | O_TRUNC | O_CREAT, + S_IRUSR | S_IWUSR ); + perror_exit(dst_fd < 0, out_file); + ftruncate(dst_fd, in_size); + dst_addr = mmap(0, in_size, PROT_WRITE, MAP_SHARED, dst_fd, 0); + perror_exit(dst_addr == MAP_FAILED, "mmap"); + + init_video_dev(); + set_fmt(format); + + if (rotation) + set_rotation(rotation); + else + set_flip(flip); + + request_buffers(&num_src_buffers, &num_dst_buffers); + get_buffer(&src_buffer, 0); + src_buffer.index = 0; + get_buffer(&dst_buffer, 1); + dst_buffer.index = 0; + + memcpy(src_buffer.addr, src_addr, framesize); + ret = process(&src_buffer, &dst_buffer); + if (ret) + return ret; + + memcpy(dst_addr, dst_buffer.addr, framesize); + + return 0; +} + -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html