255 lines
7.3 KiB
C
255 lines
7.3 KiB
C
/*
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* vivid-vbi-out.c - vbi output support functions.
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*
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* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include "vivid-core.h"
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#include "vivid-kthread-out.h"
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#include "vivid-vbi-out.h"
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#include "vivid-vbi-cap.h"
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static int vbi_out_queue_setup(struct vb2_queue *vq,
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unsigned *nbuffers, unsigned *nplanes,
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unsigned sizes[], struct device *alloc_devs[])
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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bool is_60hz = dev->std_out & V4L2_STD_525_60;
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unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
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36 * sizeof(struct v4l2_sliced_vbi_data) :
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1440 * 2 * (is_60hz ? 12 : 18);
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if (!vivid_is_svid_out(dev))
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return -EINVAL;
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sizes[0] = size;
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if (vq->num_buffers + *nbuffers < 2)
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*nbuffers = 2 - vq->num_buffers;
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*nplanes = 1;
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return 0;
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}
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static int vbi_out_buf_prepare(struct vb2_buffer *vb)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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bool is_60hz = dev->std_out & V4L2_STD_525_60;
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unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
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36 * sizeof(struct v4l2_sliced_vbi_data) :
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1440 * 2 * (is_60hz ? 12 : 18);
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dprintk(dev, 1, "%s\n", __func__);
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if (dev->buf_prepare_error) {
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/*
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* Error injection: test what happens if buf_prepare() returns
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* an error.
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*/
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dev->buf_prepare_error = false;
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return -EINVAL;
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}
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if (vb2_plane_size(vb, 0) < size) {
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dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
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__func__, vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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return 0;
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}
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static void vbi_out_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
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dprintk(dev, 1, "%s\n", __func__);
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spin_lock(&dev->slock);
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list_add_tail(&buf->list, &dev->vbi_out_active);
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spin_unlock(&dev->slock);
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}
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static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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int err;
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dprintk(dev, 1, "%s\n", __func__);
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dev->vbi_out_seq_count = 0;
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if (dev->start_streaming_error) {
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dev->start_streaming_error = false;
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err = -EINVAL;
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} else {
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err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
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}
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if (err) {
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struct vivid_buffer *buf, *tmp;
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list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
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list_del(&buf->list);
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vb2_buffer_done(&buf->vb.vb2_buf,
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VB2_BUF_STATE_QUEUED);
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}
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}
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return err;
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}
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/* abort streaming and wait for last buffer */
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static void vbi_out_stop_streaming(struct vb2_queue *vq)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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dprintk(dev, 1, "%s\n", __func__);
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vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
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dev->vbi_out_have_wss = false;
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dev->vbi_out_have_cc[0] = false;
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dev->vbi_out_have_cc[1] = false;
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}
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const struct vb2_ops vivid_vbi_out_qops = {
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.queue_setup = vbi_out_queue_setup,
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.buf_prepare = vbi_out_buf_prepare,
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.buf_queue = vbi_out_buf_queue,
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.start_streaming = vbi_out_start_streaming,
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.stop_streaming = vbi_out_stop_streaming,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct vivid_dev *dev = video_drvdata(file);
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struct v4l2_vbi_format *vbi = &f->fmt.vbi;
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bool is_60hz = dev->std_out & V4L2_STD_525_60;
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if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
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return -EINVAL;
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vbi->sampling_rate = 25000000;
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vbi->offset = 24;
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vbi->samples_per_line = 1440;
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vbi->sample_format = V4L2_PIX_FMT_GREY;
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vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
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vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
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vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
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vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
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vbi->reserved[0] = 0;
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vbi->reserved[1] = 0;
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return 0;
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}
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int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct vivid_dev *dev = video_drvdata(file);
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int ret = vidioc_g_fmt_vbi_out(file, priv, f);
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if (ret)
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return ret;
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if (vb2_is_busy(&dev->vb_vbi_out_q))
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return -EBUSY;
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dev->stream_sliced_vbi_out = false;
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dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
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return 0;
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}
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int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
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{
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struct vivid_dev *dev = video_drvdata(file);
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struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
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if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
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return -EINVAL;
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vivid_fill_service_lines(vbi, dev->service_set_out);
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return 0;
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}
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int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
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{
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struct vivid_dev *dev = video_drvdata(file);
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struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
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bool is_60hz = dev->std_out & V4L2_STD_525_60;
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u32 service_set = vbi->service_set;
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if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
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return -EINVAL;
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service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
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V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
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vivid_fill_service_lines(vbi, service_set);
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return 0;
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}
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int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,
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struct v4l2_format *fmt)
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{
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struct vivid_dev *dev = video_drvdata(file);
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struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
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int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
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if (ret)
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return ret;
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if (vb2_is_busy(&dev->vb_vbi_out_q))
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return -EBUSY;
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dev->service_set_out = vbi->service_set;
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dev->stream_sliced_vbi_out = true;
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dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
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return 0;
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}
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void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
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struct vivid_buffer *buf)
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{
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struct v4l2_sliced_vbi_data *vbi =
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vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
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unsigned elems =
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vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);
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dev->vbi_out_have_cc[0] = false;
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dev->vbi_out_have_cc[1] = false;
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dev->vbi_out_have_wss = false;
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while (elems--) {
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switch (vbi->id) {
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case V4L2_SLICED_CAPTION_525:
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if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
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dev->vbi_out_have_cc[!!vbi->field] = true;
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dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
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dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
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}
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break;
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case V4L2_SLICED_WSS_625:
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if ((dev->std_out & V4L2_STD_625_50) &&
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vbi->field == 0 && vbi->line == 23) {
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dev->vbi_out_have_wss = true;
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dev->vbi_out_wss[0] = vbi->data[0];
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dev->vbi_out_wss[1] = vbi->data[1];
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}
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break;
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}
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vbi++;
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}
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}
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