jordan/camera-streamer
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This commit is contained in:
Kamil Trzcinski
2022-04-04 14:55:16 +02:00
parent d5fe55d2e0
commit ac9831bd1a
8 changed files with 202 additions and 75 deletions
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48
buffer.c
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@ -11,30 +11,33 @@ buffer_t *buffer_open(const char *name, buffer_list_t *buf_list, int index) {
buf->buf_list = buf_list;
buf->dma_fd = -1;
if (buf_list->do_mmap) {
buf->v4l2_buffer.type = buf_list->type;
buf->v4l2_buffer.memory = V4L2_MEMORY_MMAP;
buf->v4l2_buffer.index = index;
if (!buf_list->do_mmap) {
// nothing to do here
return buf;
}
if (buf_list->do_mplanes) {
buf->v4l2_buffer.length = 1;
buf->v4l2_buffer.m.planes = &buf->v4l2_plane;
}
buf->v4l2_buffer.type = buf_list->type;
buf->v4l2_buffer.memory = V4L2_MEMORY_MMAP;
buf->v4l2_buffer.index = index;
E_XIOCTL(buf_list, dev->fd, VIDIOC_QUERYBUF, &buf->v4l2_buffer, "Cannot query buffer %d", index);
if (buf_list->do_mplanes) {
buf->v4l2_buffer.length = 1;
buf->v4l2_buffer.m.planes = &buf->v4l2_plane;
}
if (buf_list->do_mplanes) {
buf->offset = buf->v4l2_plane.m.mem_offset;
buf->length = buf->v4l2_plane.length;
} else {
buf->offset = buf->v4l2_buffer.m.offset;
buf->length = buf->v4l2_buffer.length;
}
E_XIOCTL(buf_list, dev->fd, VIDIOC_QUERYBUF, &buf->v4l2_buffer, "Cannot query buffer %d", index);
buf->start = mmap(NULL, buf->length, PROT_READ | PROT_WRITE, MAP_SHARED, dev->fd, buf->offset);
if (buf->start == MAP_FAILED) {
goto error;
}
if (buf_list->do_mplanes) {
buf->offset = buf->v4l2_plane.m.mem_offset;
buf->length = buf->v4l2_plane.length;
} else {
buf->offset = buf->v4l2_buffer.m.offset;
buf->length = buf->v4l2_buffer.length;
}
buf->start = mmap(NULL, buf->length, PROT_READ | PROT_WRITE, MAP_SHARED, dev->fd, buf->offset);
if (buf->start == MAP_FAILED) {
goto error;
}
if (buf_list->do_dma) {
@ -46,7 +49,10 @@ buffer_t *buffer_open(const char *name, buffer_list_t *buf_list, int index) {
buf->dma_fd = v4l2_exp.fd;
}
buffer_capture_enqueue(buf);
// enqueue buffer
buf->used = 0;
buf->mmap_reflinks = 1;
buffer_consumed(buf);
return buf;