#include "camera_capture.h"
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#ifdef LOG_TAG
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#undef LOG_TAG
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#endif
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#define LOG_TAG "aiqtool"
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void process_image(struct capture_info* cap_info, const void* p, int size)
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{
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static int image_index = 0;
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LOG_DEBUG("image_index %d\n", image_index++);
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if (cap_info->out_fp) {
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fwrite(p, size, 1, cap_info->out_fp);
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fflush(cap_info->out_fp);
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}
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}
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int read_frame(struct capture_info* cap_info)
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{
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struct v4l2_buffer buf;
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unsigned int i, bytesused;
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switch (cap_info->io) {
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case IO_METHOD_READ:
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if (-1 == read(cap_info->dev_fd, cap_info->buffers[0].start, cap_info->buffers[0].length)) {
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switch (errno) {
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case EAGAIN:
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return 0;
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case EIO:
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/* Could ignore EIO, see spec. */
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/* fall through */
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default:
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errno_debug("read");
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}
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}
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process_image(cap_info, cap_info->buffers[0].start, cap_info->buffers[0].length);
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break;
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case IO_METHOD_MMAP:
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CLEAR(buf);
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buf.type = cap_info->capture_buf_type;
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buf.memory = V4L2_MEMORY_MMAP;
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if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == cap_info->capture_buf_type) {
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struct v4l2_plane planes[FMT_NUM_PLANES];
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buf.m.planes = planes;
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buf.length = FMT_NUM_PLANES;
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}
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if (device_dqbuf(cap_info->dev_fd, &buf) == -1)
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break;
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assert(buf.index < cap_info->n_buffers);
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if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == cap_info->capture_buf_type) {
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bytesused = buf.m.planes[0].bytesused;
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} else {
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bytesused = buf.bytesused;
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}
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process_image(cap_info, cap_info->buffers[buf.index].start, bytesused);
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device_qbuf(cap_info->dev_fd, &buf);
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break;
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case IO_METHOD_USERPTR:
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CLEAR(buf);
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buf.type = cap_info->capture_buf_type;
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buf.memory = V4L2_MEMORY_USERPTR;
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if (device_dqbuf(cap_info->dev_fd, &buf) == -1)
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break;
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for (i = 0; i < cap_info->n_buffers; ++i) {
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if (buf.m.userptr == (unsigned long)cap_info->buffers[i].start &&
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buf.length == cap_info->buffers[i].length) {
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break;
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}
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}
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assert(i < cap_info->n_buffers);
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process_image(cap_info, (void*)buf.m.userptr, buf.bytesused);
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device_qbuf(cap_info->dev_fd, &buf);
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break;
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}
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return 1;
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}
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int read_frame(int handler, int index, struct capture_info* cap_info, CaptureCallBack callback)
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{
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struct v4l2_buffer buf;
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unsigned int i, bytesused;
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switch (cap_info->io) {
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case IO_METHOD_READ:
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if (-1 == read(cap_info->dev_fd, cap_info->buffers[0].start, cap_info->buffers[0].length)) {
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switch (errno) {
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case EAGAIN:
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return 0;
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case EIO:
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/* Could ignore EIO, see spec. */
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/* fall through */
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default:
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errno_debug("read");
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}
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}
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if (callback)
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callback(handler, index, cap_info->buffers[0].start, cap_info->buffers[0].length);
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break;
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case IO_METHOD_MMAP:
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CLEAR(buf);
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struct v4l2_plane planes[FMT_NUM_PLANES];
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buf.type = cap_info->capture_buf_type;
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buf.memory = V4L2_MEMORY_MMAP;
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if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == cap_info->capture_buf_type) {
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buf.m.planes = planes;
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buf.length = FMT_NUM_PLANES;
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}
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if (device_dqbuf(cap_info->dev_fd, &buf) == -1)
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break;
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assert(buf.index < cap_info->n_buffers);
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if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == cap_info->capture_buf_type) {
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bytesused = buf.m.planes[0].bytesused;
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} else {
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bytesused = buf.bytesused;
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}
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if (callback) {
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callback(handler, index, cap_info->buffers[buf.index].start, bytesused);
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}
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memset(cap_info->buffers[buf.index].start, 0, bytesused);
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device_qbuf(cap_info->dev_fd, &buf);
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break;
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case IO_METHOD_USERPTR:
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CLEAR(buf);
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buf.type = cap_info->capture_buf_type;
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buf.memory = V4L2_MEMORY_USERPTR;
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if (device_dqbuf(cap_info->dev_fd, &buf) == -1)
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break;
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for (i = 0; i < cap_info->n_buffers; ++i)
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if (buf.m.userptr == (unsigned long)cap_info->buffers[i].start &&
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buf.length == cap_info->buffers[i].length) {
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break;
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}
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assert(i < cap_info->n_buffers);
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if (callback) {
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callback(handler, index, (void*)buf.m.userptr, buf.bytesused);
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}
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device_qbuf(cap_info->dev_fd, &buf);
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break;
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}
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return 1;
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}
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void stop_capturing(struct capture_info* cap_info)
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{
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enum v4l2_buf_type type;
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switch (cap_info->io) {
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case IO_METHOD_READ:
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/* Nothing to do. */
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break;
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case IO_METHOD_MMAP:
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case IO_METHOD_USERPTR:
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type = cap_info->capture_buf_type;
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device_streamoff(cap_info->dev_fd, &type);
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break;
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}
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}
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void start_capturing(struct capture_info* cap_info)
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{
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unsigned int i;
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enum v4l2_buf_type type;
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LOG_DEBUG("#### start_capturing, cap_info.dev_name:%s\n", cap_info->dev_name);
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switch (cap_info->io) {
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case IO_METHOD_READ:
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/* Nothing to do. */
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break;
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case IO_METHOD_MMAP:
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LOG_DEBUG("IO_METHOD_MMAP, buffer number:%d\n", cap_info->n_buffers);
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for (i = 0; i < cap_info->n_buffers; ++i) {
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struct v4l2_buffer buf;
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CLEAR(buf);
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buf.type = cap_info->capture_buf_type;
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buf.memory = V4L2_MEMORY_MMAP;
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buf.index = i;
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if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == cap_info->capture_buf_type) {
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struct v4l2_plane planes[FMT_NUM_PLANES];
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buf.m.planes = planes;
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buf.length = FMT_NUM_PLANES;
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}
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device_qbuf(cap_info->dev_fd, &buf);
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}
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type = cap_info->capture_buf_type;
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device_streamon(cap_info->dev_fd, &type);
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break;
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case IO_METHOD_USERPTR:
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for (i = 0; i < cap_info->n_buffers; ++i) {
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struct v4l2_buffer buf;
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CLEAR(buf);
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buf.type = cap_info->capture_buf_type;
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buf.memory = V4L2_MEMORY_USERPTR;
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buf.index = i;
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buf.m.userptr = (unsigned long)cap_info->buffers[i].start;
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buf.length = cap_info->buffers[i].length;
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if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == cap_info->capture_buf_type) {
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struct v4l2_plane planes[FMT_NUM_PLANES];
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planes[0].m.userptr = (unsigned long)cap_info->buffers[i].start;
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planes[0].length = cap_info->buffers[i].length;
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buf.m.planes = planes;
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buf.length = FMT_NUM_PLANES;
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}
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device_qbuf(cap_info->dev_fd, &buf);
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}
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type = cap_info->capture_buf_type;
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device_streamon(cap_info->dev_fd, &type);
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break;
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}
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}
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void uninit_device(struct capture_info* cap_info)
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{
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unsigned int i;
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switch (cap_info->io) {
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case IO_METHOD_READ:
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free(cap_info->buffers[0].start);
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break;
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case IO_METHOD_MMAP:
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for (i = 0; i < cap_info->n_buffers; ++i)
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if (-1 == munmap(cap_info->buffers[i].start, cap_info->buffers[i].length)) {
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errno_debug("munmap");
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}
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break;
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case IO_METHOD_USERPTR:
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for (i = 0; i < cap_info->n_buffers; ++i) {
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free(cap_info->buffers[i].start);
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}
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break;
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}
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free(cap_info->buffers);
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device_close(cap_info->dev_fd);
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cap_info->dev_fd = -1;
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}
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int init_device(struct capture_info* cap_info)
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{
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struct v4l2_capability cap;
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struct v4l2_cropcap cropcap;
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struct v4l2_crop crop;
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struct v4l2_format fmt;
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unsigned int min;
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int ret;
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cap_info->dev_fd = device_open(cap_info->dev_name);
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if (-1 != device_querycap(cap_info->dev_fd, &cap)) {
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if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) && !(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE)) {
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LOG_ERROR("%s is no video capture device\n", cap_info->dev_name);
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return -1;
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}
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}
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if (-1 == check_io_method(cap_info->io, cap.capabilities)) {
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return -1;
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}
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CLEAR(cropcap);
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cropcap.type = cap_info->capture_buf_type;
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crop.type = cap_info->capture_buf_type;
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// crop.c = cropcap.defrect; /* reset to default */
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crop.c.left = 0;
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crop.c.top = 0;
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crop.c.width = cap_info->width;
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crop.c.height = cap_info->height;
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if (cap_info->link == link_to_isp) {
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device_cropcap(cap_info->dev_fd, &cropcap, &crop);
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}
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CLEAR(fmt);
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if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) {
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cap_info->capture_buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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} else if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) {
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cap_info->capture_buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
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}
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if (cap_info->format) {
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fmt.type = cap_info->capture_buf_type;
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fmt.fmt.pix.width = cap_info->width;
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fmt.fmt.pix.height = cap_info->height;
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fmt.fmt.pix.pixelformat = cap_info->format;
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fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
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ret = device_setformat(cap_info->dev_fd, &fmt);
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if (ret) {
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LOG_ERROR("%s set format failed\n", cap_info->dev_name);
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} else {
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LOG_INFO("%s set format success\n", cap_info->dev_name);
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}
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} else {
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device_getformat(cap_info->dev_fd, &fmt);
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}
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/* Buggy driver paranoia. */
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min = fmt.fmt.pix.width * 2;
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if (fmt.fmt.pix.bytesperline < min) {
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fmt.fmt.pix.bytesperline = min;
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}
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min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
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if (fmt.fmt.pix.sizeimage < min) {
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fmt.fmt.pix.sizeimage = min;
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}
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init_io_method(cap_info, fmt.fmt.pix.sizeimage);
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return 0;
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}
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