538 lines
14 KiB
C
538 lines
14 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Vertical Blank Interval support functions
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Copyright (C) 2004-2007 Hans Verkuil <hverkuil@xs4all.nl>
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*/
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#include "ivtv-driver.h"
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#include "ivtv-i2c.h"
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#include "ivtv-ioctl.h"
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#include "ivtv-queue.h"
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#include "ivtv-cards.h"
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#include "ivtv-vbi.h"
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static void ivtv_set_vps(struct ivtv *itv, int enabled)
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{
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struct v4l2_sliced_vbi_data data;
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if (!(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
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return;
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data.id = V4L2_SLICED_VPS;
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data.field = 0;
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data.line = enabled ? 16 : 0;
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data.data[2] = itv->vbi.vps_payload.data[0];
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data.data[8] = itv->vbi.vps_payload.data[1];
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data.data[9] = itv->vbi.vps_payload.data[2];
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data.data[10] = itv->vbi.vps_payload.data[3];
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data.data[11] = itv->vbi.vps_payload.data[4];
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ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
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}
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static void ivtv_set_cc(struct ivtv *itv, int mode, const struct vbi_cc *cc)
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{
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struct v4l2_sliced_vbi_data data;
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if (!(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
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return;
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data.id = V4L2_SLICED_CAPTION_525;
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data.field = 0;
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data.line = (mode & 1) ? 21 : 0;
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data.data[0] = cc->odd[0];
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data.data[1] = cc->odd[1];
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ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
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data.field = 1;
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data.line = (mode & 2) ? 21 : 0;
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data.data[0] = cc->even[0];
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data.data[1] = cc->even[1];
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ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
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}
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static void ivtv_set_wss(struct ivtv *itv, int enabled, int mode)
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{
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struct v4l2_sliced_vbi_data data;
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if (!(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT))
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return;
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/* When using a 50 Hz system, always turn on the
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wide screen signal with 4x3 ratio as the default.
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Turning this signal on and off can confuse certain
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TVs. As far as I can tell there is no reason not to
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transmit this signal. */
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if ((itv->std_out & V4L2_STD_625_50) && !enabled) {
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enabled = 1;
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mode = 0x08; /* 4x3 full format */
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}
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data.id = V4L2_SLICED_WSS_625;
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data.field = 0;
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data.line = enabled ? 23 : 0;
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data.data[0] = mode & 0xff;
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data.data[1] = (mode >> 8) & 0xff;
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ivtv_call_hw(itv, IVTV_HW_SAA7127, vbi, s_vbi_data, &data);
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}
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static int odd_parity(u8 c)
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{
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c ^= (c >> 4);
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c ^= (c >> 2);
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c ^= (c >> 1);
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return c & 1;
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}
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static void ivtv_write_vbi_line(struct ivtv *itv,
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const struct v4l2_sliced_vbi_data *d,
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struct vbi_cc *cc, int *found_cc)
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{
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struct vbi_info *vi = &itv->vbi;
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if (d->id == V4L2_SLICED_CAPTION_525 && d->line == 21) {
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if (d->field) {
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cc->even[0] = d->data[0];
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cc->even[1] = d->data[1];
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} else {
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cc->odd[0] = d->data[0];
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cc->odd[1] = d->data[1];
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}
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*found_cc = 1;
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} else if (d->id == V4L2_SLICED_VPS && d->line == 16 && d->field == 0) {
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struct vbi_vps vps;
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vps.data[0] = d->data[2];
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vps.data[1] = d->data[8];
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vps.data[2] = d->data[9];
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vps.data[3] = d->data[10];
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vps.data[4] = d->data[11];
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if (memcmp(&vps, &vi->vps_payload, sizeof(vps))) {
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vi->vps_payload = vps;
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set_bit(IVTV_F_I_UPDATE_VPS, &itv->i_flags);
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}
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} else if (d->id == V4L2_SLICED_WSS_625 &&
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d->line == 23 && d->field == 0) {
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int wss = d->data[0] | d->data[1] << 8;
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if (vi->wss_payload != wss) {
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vi->wss_payload = wss;
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set_bit(IVTV_F_I_UPDATE_WSS, &itv->i_flags);
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}
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}
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}
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static void ivtv_write_vbi_cc_lines(struct ivtv *itv, const struct vbi_cc *cc)
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{
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struct vbi_info *vi = &itv->vbi;
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if (vi->cc_payload_idx < ARRAY_SIZE(vi->cc_payload)) {
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memcpy(&vi->cc_payload[vi->cc_payload_idx], cc,
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sizeof(struct vbi_cc));
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vi->cc_payload_idx++;
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set_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags);
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}
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}
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static void ivtv_write_vbi(struct ivtv *itv,
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const struct v4l2_sliced_vbi_data *sliced,
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size_t cnt)
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{
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struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
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int found_cc = 0;
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size_t i;
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for (i = 0; i < cnt; i++)
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ivtv_write_vbi_line(itv, sliced + i, &cc, &found_cc);
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if (found_cc)
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ivtv_write_vbi_cc_lines(itv, &cc);
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}
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ssize_t
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ivtv_write_vbi_from_user(struct ivtv *itv,
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const struct v4l2_sliced_vbi_data __user *sliced,
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size_t cnt)
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{
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struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
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int found_cc = 0;
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size_t i;
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struct v4l2_sliced_vbi_data d;
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ssize_t ret = cnt * sizeof(struct v4l2_sliced_vbi_data);
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for (i = 0; i < cnt; i++) {
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if (copy_from_user(&d, sliced + i,
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sizeof(struct v4l2_sliced_vbi_data))) {
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ret = -EFAULT;
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break;
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}
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ivtv_write_vbi_line(itv, &d, &cc, &found_cc);
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}
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if (found_cc)
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ivtv_write_vbi_cc_lines(itv, &cc);
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return ret;
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}
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static void copy_vbi_data(struct ivtv *itv, int lines, u32 pts_stamp)
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{
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int line = 0;
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int i;
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u32 linemask[2] = { 0, 0 };
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unsigned short size;
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static const u8 mpeg_hdr_data[] = {
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0x00, 0x00, 0x01, 0xba, 0x44, 0x00, 0x0c, 0x66,
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0x24, 0x01, 0x01, 0xd1, 0xd3, 0xfa, 0xff, 0xff,
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0x00, 0x00, 0x01, 0xbd, 0x00, 0x1a, 0x84, 0x80,
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0x07, 0x21, 0x00, 0x5d, 0x63, 0xa7, 0xff, 0xff
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};
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const int sd = sizeof(mpeg_hdr_data); /* start of vbi data */
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int idx = itv->vbi.frame % IVTV_VBI_FRAMES;
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u8 *dst = &itv->vbi.sliced_mpeg_data[idx][0];
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for (i = 0; i < lines; i++) {
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int f, l;
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if (itv->vbi.sliced_data[i].id == 0)
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continue;
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l = itv->vbi.sliced_data[i].line - 6;
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f = itv->vbi.sliced_data[i].field;
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if (f)
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l += 18;
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if (l < 32)
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linemask[0] |= (1 << l);
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else
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linemask[1] |= (1 << (l - 32));
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dst[sd + 12 + line * 43] =
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ivtv_service2vbi(itv->vbi.sliced_data[i].id);
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memcpy(dst + sd + 12 + line * 43 + 1, itv->vbi.sliced_data[i].data, 42);
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line++;
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}
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memcpy(dst, mpeg_hdr_data, sizeof(mpeg_hdr_data));
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if (line == 36) {
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/* All lines are used, so there is no space for the linemask
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(the max size of the VBI data is 36 * 43 + 4 bytes).
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So in this case we use the magic number 'ITV0'. */
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memcpy(dst + sd, "ITV0", 4);
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memmove(dst + sd + 4, dst + sd + 12, line * 43);
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size = 4 + ((43 * line + 3) & ~3);
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} else {
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memcpy(dst + sd, "itv0", 4);
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cpu_to_le32s(&linemask[0]);
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cpu_to_le32s(&linemask[1]);
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memcpy(dst + sd + 4, &linemask[0], 8);
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size = 12 + ((43 * line + 3) & ~3);
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}
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dst[4+16] = (size + 10) >> 8;
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dst[5+16] = (size + 10) & 0xff;
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dst[9+16] = 0x21 | ((pts_stamp >> 29) & 0x6);
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dst[10+16] = (pts_stamp >> 22) & 0xff;
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dst[11+16] = 1 | ((pts_stamp >> 14) & 0xff);
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dst[12+16] = (pts_stamp >> 7) & 0xff;
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dst[13+16] = 1 | ((pts_stamp & 0x7f) << 1);
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itv->vbi.sliced_mpeg_size[idx] = sd + size;
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}
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static int ivtv_convert_ivtv_vbi(struct ivtv *itv, u8 *p)
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{
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u32 linemask[2];
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int i, l, id2;
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int line = 0;
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if (!memcmp(p, "itv0", 4)) {
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memcpy(linemask, p + 4, 8);
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p += 12;
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} else if (!memcmp(p, "ITV0", 4)) {
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linemask[0] = 0xffffffff;
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linemask[1] = 0xf;
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p += 4;
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} else {
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/* unknown VBI data, convert to empty VBI frame */
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linemask[0] = linemask[1] = 0;
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}
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for (i = 0; i < 36; i++) {
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int err = 0;
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if (i < 32 && !(linemask[0] & (1 << i)))
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continue;
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if (i >= 32 && !(linemask[1] & (1 << (i - 32))))
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continue;
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id2 = *p & 0xf;
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switch (id2) {
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case IVTV_SLICED_TYPE_TELETEXT_B:
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id2 = V4L2_SLICED_TELETEXT_B;
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break;
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case IVTV_SLICED_TYPE_CAPTION_525:
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id2 = V4L2_SLICED_CAPTION_525;
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err = !odd_parity(p[1]) || !odd_parity(p[2]);
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break;
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case IVTV_SLICED_TYPE_VPS:
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id2 = V4L2_SLICED_VPS;
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break;
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case IVTV_SLICED_TYPE_WSS_625:
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id2 = V4L2_SLICED_WSS_625;
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break;
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default:
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id2 = 0;
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break;
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}
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if (err == 0) {
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l = (i < 18) ? i + 6 : i - 18 + 6;
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itv->vbi.sliced_dec_data[line].line = l;
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itv->vbi.sliced_dec_data[line].field = i >= 18;
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itv->vbi.sliced_dec_data[line].id = id2;
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memcpy(itv->vbi.sliced_dec_data[line].data, p + 1, 42);
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line++;
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}
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p += 43;
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}
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while (line < 36) {
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itv->vbi.sliced_dec_data[line].id = 0;
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itv->vbi.sliced_dec_data[line].line = 0;
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itv->vbi.sliced_dec_data[line].field = 0;
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line++;
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}
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return line * sizeof(itv->vbi.sliced_dec_data[0]);
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}
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/* Compress raw VBI format, removes leading SAV codes and surplus space after the
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field.
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Returns new compressed size. */
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static u32 compress_raw_buf(struct ivtv *itv, u8 *buf, u32 size)
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{
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u32 line_size = itv->vbi.raw_decoder_line_size;
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u32 lines = itv->vbi.count;
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u8 sav1 = itv->vbi.raw_decoder_sav_odd_field;
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u8 sav2 = itv->vbi.raw_decoder_sav_even_field;
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u8 *q = buf;
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u8 *p;
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int i;
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for (i = 0; i < lines; i++) {
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p = buf + i * line_size;
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/* Look for SAV code */
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if (p[0] != 0xff || p[1] || p[2] || (p[3] != sav1 && p[3] != sav2)) {
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break;
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}
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memcpy(q, p + 4, line_size - 4);
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q += line_size - 4;
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}
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return lines * (line_size - 4);
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}
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/* Compressed VBI format, all found sliced blocks put next to one another
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Returns new compressed size */
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static u32 compress_sliced_buf(struct ivtv *itv, u32 line, u8 *buf, u32 size, u8 sav)
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{
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u32 line_size = itv->vbi.sliced_decoder_line_size;
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struct v4l2_decode_vbi_line vbi = {};
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int i;
|
||
|
|
unsigned lines = 0;
|
||
|
|
|
||
|
|
/* find the first valid line */
|
||
|
|
for (i = 0; i < size; i++, buf++) {
|
||
|
|
if (buf[0] == 0xff && !buf[1] && !buf[2] && buf[3] == sav)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
size -= i;
|
||
|
|
if (size < line_size) {
|
||
|
|
return line;
|
||
|
|
}
|
||
|
|
for (i = 0; i < size / line_size; i++) {
|
||
|
|
u8 *p = buf + i * line_size;
|
||
|
|
|
||
|
|
/* Look for SAV code */
|
||
|
|
if (p[0] != 0xff || p[1] || p[2] || p[3] != sav) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
vbi.p = p + 4;
|
||
|
|
v4l2_subdev_call(itv->sd_video, vbi, decode_vbi_line, &vbi);
|
||
|
|
if (vbi.type && !(lines & (1 << vbi.line))) {
|
||
|
|
lines |= 1 << vbi.line;
|
||
|
|
itv->vbi.sliced_data[line].id = vbi.type;
|
||
|
|
itv->vbi.sliced_data[line].field = vbi.is_second_field;
|
||
|
|
itv->vbi.sliced_data[line].line = vbi.line;
|
||
|
|
memcpy(itv->vbi.sliced_data[line].data, vbi.p, 42);
|
||
|
|
line++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return line;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ivtv_process_vbi_data(struct ivtv *itv, struct ivtv_buffer *buf,
|
||
|
|
u64 pts_stamp, int streamtype)
|
||
|
|
{
|
||
|
|
u8 *p = (u8 *) buf->buf;
|
||
|
|
u32 size = buf->bytesused;
|
||
|
|
int y;
|
||
|
|
|
||
|
|
/* Raw VBI data */
|
||
|
|
if (streamtype == IVTV_ENC_STREAM_TYPE_VBI && ivtv_raw_vbi(itv)) {
|
||
|
|
u8 type;
|
||
|
|
|
||
|
|
ivtv_buf_swap(buf);
|
||
|
|
|
||
|
|
type = p[3];
|
||
|
|
|
||
|
|
size = buf->bytesused = compress_raw_buf(itv, p, size);
|
||
|
|
|
||
|
|
/* second field of the frame? */
|
||
|
|
if (type == itv->vbi.raw_decoder_sav_even_field) {
|
||
|
|
/* Dirty hack needed for backwards
|
||
|
|
compatibility of old VBI software. */
|
||
|
|
p += size - 4;
|
||
|
|
memcpy(p, &itv->vbi.frame, 4);
|
||
|
|
itv->vbi.frame++;
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Sliced VBI data with data insertion */
|
||
|
|
if (streamtype == IVTV_ENC_STREAM_TYPE_VBI) {
|
||
|
|
int lines;
|
||
|
|
|
||
|
|
ivtv_buf_swap(buf);
|
||
|
|
|
||
|
|
/* first field */
|
||
|
|
lines = compress_sliced_buf(itv, 0, p, size / 2,
|
||
|
|
itv->vbi.sliced_decoder_sav_odd_field);
|
||
|
|
/* second field */
|
||
|
|
/* experimentation shows that the second half does not always begin
|
||
|
|
at the exact address. So start a bit earlier (hence 32). */
|
||
|
|
lines = compress_sliced_buf(itv, lines, p + size / 2 - 32, size / 2 + 32,
|
||
|
|
itv->vbi.sliced_decoder_sav_even_field);
|
||
|
|
/* always return at least one empty line */
|
||
|
|
if (lines == 0) {
|
||
|
|
itv->vbi.sliced_data[0].id = 0;
|
||
|
|
itv->vbi.sliced_data[0].line = 0;
|
||
|
|
itv->vbi.sliced_data[0].field = 0;
|
||
|
|
lines = 1;
|
||
|
|
}
|
||
|
|
buf->bytesused = size = lines * sizeof(itv->vbi.sliced_data[0]);
|
||
|
|
memcpy(p, &itv->vbi.sliced_data[0], size);
|
||
|
|
|
||
|
|
if (itv->vbi.insert_mpeg) {
|
||
|
|
copy_vbi_data(itv, lines, pts_stamp);
|
||
|
|
}
|
||
|
|
itv->vbi.frame++;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Sliced VBI re-inserted from an MPEG stream */
|
||
|
|
if (streamtype == IVTV_DEC_STREAM_TYPE_VBI) {
|
||
|
|
/* If the size is not 4-byte aligned, then the starting address
|
||
|
|
for the swapping is also shifted. After swapping the data the
|
||
|
|
real start address of the VBI data is exactly 4 bytes after the
|
||
|
|
original start. It's a bit fiddly but it works like a charm.
|
||
|
|
Non-4-byte alignment happens when an lseek is done on the input
|
||
|
|
mpeg file to a non-4-byte aligned position. So on arrival here
|
||
|
|
the VBI data is also non-4-byte aligned. */
|
||
|
|
int offset = size & 3;
|
||
|
|
int cnt;
|
||
|
|
|
||
|
|
if (offset) {
|
||
|
|
p += 4 - offset;
|
||
|
|
}
|
||
|
|
/* Swap Buffer */
|
||
|
|
for (y = 0; y < size; y += 4) {
|
||
|
|
swab32s((u32 *)(p + y));
|
||
|
|
}
|
||
|
|
|
||
|
|
cnt = ivtv_convert_ivtv_vbi(itv, p + offset);
|
||
|
|
memcpy(buf->buf, itv->vbi.sliced_dec_data, cnt);
|
||
|
|
buf->bytesused = cnt;
|
||
|
|
|
||
|
|
ivtv_write_vbi(itv, itv->vbi.sliced_dec_data,
|
||
|
|
cnt / sizeof(itv->vbi.sliced_dec_data[0]));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ivtv_disable_cc(struct ivtv *itv)
|
||
|
|
{
|
||
|
|
struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
|
||
|
|
|
||
|
|
clear_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags);
|
||
|
|
ivtv_set_cc(itv, 0, &cc);
|
||
|
|
itv->vbi.cc_payload_idx = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void ivtv_vbi_work_handler(struct ivtv *itv)
|
||
|
|
{
|
||
|
|
struct vbi_info *vi = &itv->vbi;
|
||
|
|
struct v4l2_sliced_vbi_data data;
|
||
|
|
struct vbi_cc cc = { .odd = { 0x80, 0x80 }, .even = { 0x80, 0x80 } };
|
||
|
|
|
||
|
|
/* Lock */
|
||
|
|
if (itv->output_mode == OUT_PASSTHROUGH) {
|
||
|
|
if (itv->is_50hz) {
|
||
|
|
data.id = V4L2_SLICED_WSS_625;
|
||
|
|
data.field = 0;
|
||
|
|
|
||
|
|
if (v4l2_subdev_call(itv->sd_video, vbi, g_vbi_data, &data) == 0) {
|
||
|
|
ivtv_set_wss(itv, 1, data.data[0] & 0xf);
|
||
|
|
vi->wss_missing_cnt = 0;
|
||
|
|
} else if (vi->wss_missing_cnt == 4) {
|
||
|
|
ivtv_set_wss(itv, 1, 0x8); /* 4x3 full format */
|
||
|
|
} else {
|
||
|
|
vi->wss_missing_cnt++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
int mode = 0;
|
||
|
|
|
||
|
|
data.id = V4L2_SLICED_CAPTION_525;
|
||
|
|
data.field = 0;
|
||
|
|
if (v4l2_subdev_call(itv->sd_video, vbi, g_vbi_data, &data) == 0) {
|
||
|
|
mode |= 1;
|
||
|
|
cc.odd[0] = data.data[0];
|
||
|
|
cc.odd[1] = data.data[1];
|
||
|
|
}
|
||
|
|
data.field = 1;
|
||
|
|
if (v4l2_subdev_call(itv->sd_video, vbi, g_vbi_data, &data) == 0) {
|
||
|
|
mode |= 2;
|
||
|
|
cc.even[0] = data.data[0];
|
||
|
|
cc.even[1] = data.data[1];
|
||
|
|
}
|
||
|
|
if (mode) {
|
||
|
|
vi->cc_missing_cnt = 0;
|
||
|
|
ivtv_set_cc(itv, mode, &cc);
|
||
|
|
} else if (vi->cc_missing_cnt == 4) {
|
||
|
|
ivtv_set_cc(itv, 0, &cc);
|
||
|
|
} else {
|
||
|
|
vi->cc_missing_cnt++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (test_and_clear_bit(IVTV_F_I_UPDATE_WSS, &itv->i_flags)) {
|
||
|
|
ivtv_set_wss(itv, 1, vi->wss_payload & 0xf);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (test_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags)) {
|
||
|
|
if (vi->cc_payload_idx == 0) {
|
||
|
|
clear_bit(IVTV_F_I_UPDATE_CC, &itv->i_flags);
|
||
|
|
ivtv_set_cc(itv, 3, &cc);
|
||
|
|
}
|
||
|
|
while (vi->cc_payload_idx) {
|
||
|
|
cc = vi->cc_payload[0];
|
||
|
|
|
||
|
|
memmove(vi->cc_payload, vi->cc_payload + 1,
|
||
|
|
sizeof(vi->cc_payload) - sizeof(vi->cc_payload[0]));
|
||
|
|
vi->cc_payload_idx--;
|
||
|
|
if (vi->cc_payload_idx && cc.odd[0] == 0x80 && cc.odd[1] == 0x80)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
ivtv_set_cc(itv, 3, &cc);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (test_and_clear_bit(IVTV_F_I_UPDATE_VPS, &itv->i_flags)) {
|
||
|
|
ivtv_set_vps(itv, 1);
|
||
|
|
}
|
||
|
|
}
|