* [v4l-utils PATCH v4 1/3] v4l-utils: copy fwht-ctrls.h from kernel dir
@ 2019-02-26 19:28 Dafna Hirschfeld
2019-02-26 19:28 ` [v4l-utils PATCH v4 2/3] v4l2-ctl: Add functions and variables to support fwht stateless decoder Dafna Hirschfeld
2019-02-26 19:29 ` [v4l-utils PATCH v4 3/3] v4l2-ctl: Add implementation for the stateless fwht decoder Dafna Hirschfeld
0 siblings, 2 replies; 3+ messages in thread
From: Dafna Hirschfeld @ 2019-02-26 19:28 UTC (permalink / raw)
To: linux-media; +Cc: hverkuil, helen.koike, Dafna Hirschfeld
copy fwht-ctrls.h from the kernel dir when
running 'sync' and add typedef for u64
in codec-fwht.h
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
Makefile.am | 1 +
utils/common/codec-fwht.patch | 7 ++++---
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/Makefile.am b/Makefile.am
index b0b8a098..8abe4f94 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -52,6 +52,7 @@ sync-with-kernel:
cp -a $(KERNEL_DIR)/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c $(top_srcdir)/utils/common
cp -a $(KERNEL_DIR)/drivers/media/common/v4l2-tpg/v4l2-tpg-colors.c $(top_srcdir)/utils/common
cp -a $(KERNEL_DIR)/include/media/tpg/v4l2-tpg* $(top_srcdir)/utils/common
+ cp -a $(KERNEL_DIR)/include/media/fwht-ctrls.h $(top_srcdir)/utils/common
patch -d $(top_srcdir) --no-backup-if-mismatch -p0 <$(top_srcdir)/utils/common/v4l2-tpg.patch
cp -a $(KERNEL_DIR)/drivers/media/platform/vicodec/codec-fwht.[ch] $(top_srcdir)/utils/common/
cp -a $(KERNEL_DIR)/drivers/media/platform/vicodec/codec-v4l2-fwht.[ch] $(top_srcdir)/utils/common/
diff --git a/utils/common/codec-fwht.patch b/utils/common/codec-fwht.patch
index 37ac4672..ad27b37a 100644
--- a/utils/common/codec-fwht.patch
+++ b/utils/common/codec-fwht.patch
@@ -1,6 +1,6 @@
---- a/utils/common/codec-fwht.h.old 2018-12-29 11:23:58.128328613 -0800
-+++ b/utils/common/codec-fwht.h 2018-12-29 11:24:16.099127560 -0800
-@@ -8,8 +8,26 @@
+--- a/utils/common/codec-fwht.h.old 2019-02-23 09:38:59.454065366 -0800
++++ b/utils/common/codec-fwht.h 2019-02-23 09:40:44.007803414 -0800
+@@ -8,8 +8,27 @@
#define CODEC_FWHT_H
#include <linux/types.h>
@@ -21,6 +21,7 @@
+#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
+
+
++typedef __u64 u64;
+typedef __u32 u32;
+typedef __u16 u16;
+typedef __s16 s16;
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [v4l-utils PATCH v4 2/3] v4l2-ctl: Add functions and variables to support fwht stateless decoder
2019-02-26 19:28 [v4l-utils PATCH v4 1/3] v4l-utils: copy fwht-ctrls.h from kernel dir Dafna Hirschfeld
@ 2019-02-26 19:28 ` Dafna Hirschfeld
2019-02-26 19:29 ` [v4l-utils PATCH v4 3/3] v4l2-ctl: Add implementation for the stateless fwht decoder Dafna Hirschfeld
1 sibling, 0 replies; 3+ messages in thread
From: Dafna Hirschfeld @ 2019-02-26 19:28 UTC (permalink / raw)
To: linux-media; +Cc: hverkuil, helen.koike, Dafna Hirschfeld
Add the variable 'last_fwht_bf_ts' and the array 'fwht_reqs' to
allow the fwht stateless decoder to maintain the requests.
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
utils/v4l2-ctl/v4l2-ctl-streaming.cpp | 130 ++++++++++++++++++++++++++
1 file changed, 130 insertions(+)
diff --git a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
index adfa6796..f1a0b0d0 100644
--- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
@@ -17,9 +17,12 @@
#include <sys/mman.h>
#include <dirent.h>
#include <math.h>
+#include <linux/media.h>
#include "v4l2-ctl.h"
#include "v4l-stream.h"
+#include <media-info.h>
+#include <fwht-ctrls.h>
extern "C" {
#include "v4l2-tpg.h"
@@ -80,6 +83,16 @@ static bool support_cap_compose;
static bool support_out_crop;
static bool in_source_change_event;
+static __u64 last_fwht_bf_ts;
+
+struct request_fwht {
+ int fd;
+ __u64 ts;
+ struct v4l2_ctrl_fwht_params params;
+};
+
+static request_fwht fwht_reqs[VIDEO_MAX_FRAME];
+
#define TS_WINDOW 241
#define FILE_HDR_ID v4l2_fourcc('V', 'h', 'd', 'r')
@@ -420,6 +433,12 @@ static int get_out_crop_rect(cv4l_fd &fd)
return 0;
}
+static __u64 get_ns_timestamp(cv4l_buffer &buf)
+{
+ const struct timeval tv = buf.g_timestamp();
+ return v4l2_timeval_to_ns(&tv);
+}
+
static void set_time_stamp(cv4l_buffer &buf)
{
if ((buf.g_flags() & V4L2_BUF_FLAG_TIMESTAMP_MASK) != V4L2_BUF_FLAG_TIMESTAMP_COPY)
@@ -749,6 +768,117 @@ void streaming_cmd(int ch, char *optarg)
}
}
+/*
+ * Assume that the fwht stream is valid and that each
+ * frame starts right after the previous one.
+ */
+static void read_fwht_frame(cv4l_fmt &fmt, unsigned char *buf,
+ FILE *fpointer, unsigned &sz,
+ unsigned &len)
+{
+ struct fwht_cframe_hdr *h = (struct fwht_cframe_hdr *)buf;
+
+ len = sizeof(struct fwht_cframe_hdr);
+ sz = fread(buf, 1, sizeof(struct fwht_cframe_hdr), fpointer);
+ if (sz < sizeof(struct fwht_cframe_hdr))
+ return;
+
+ len += ntohl(h->size);
+ sz += fread(buf + sz, 1, ntohl(h->size), fpointer);
+}
+
+static void set_fwht_stateless_params(struct v4l2_ctrl_fwht_params &fwht_params,
+ const struct fwht_cframe_hdr *hdr,
+ __u64 last_bf_ts)
+{
+ fwht_params.backward_ref_ts = last_bf_ts;
+ fwht_params.version = ntohl(hdr->version);
+ fwht_params.width = ntohl(hdr->width);
+ fwht_params.height = ntohl(hdr->height);
+ fwht_params.flags = ntohl(hdr->flags);
+ fwht_params.colorspace = ntohl(hdr->colorspace);
+ fwht_params.xfer_func = ntohl(hdr->xfer_func);
+ fwht_params.ycbcr_enc = ntohl(hdr->ycbcr_enc);
+ fwht_params.quantization = ntohl(hdr->quantization);
+ fwht_params.comp_frame_size = ntohl(hdr->size);
+
+ if (!last_bf_ts)
+ fwht_params.flags |= FWHT_FL_I_FRAME;
+}
+
+static int alloc_fwht_req(int media_fd, unsigned index)
+{
+ int rc = 0;
+
+ rc = ioctl(media_fd, MEDIA_IOC_REQUEST_ALLOC, &fwht_reqs[index]);
+ if (rc < 0) {
+ fprintf(stderr, "Unable to allocate media request: %s\n",
+ strerror(errno));
+ return rc;
+ }
+
+ return 0;
+}
+
+static void set_fwht_req_by_idx(unsigned idx, struct fwht_cframe_hdr *hdr,
+ __u64 last_bf_ts, __u64 ts)
+{
+ struct v4l2_ctrl_fwht_params fwht_params;
+
+ set_fwht_stateless_params(fwht_params, hdr, last_bf_ts);
+
+ fwht_reqs[idx].ts = ts;
+ fwht_reqs[idx].params = fwht_params;
+}
+
+static int get_fwht_req_by_ts(__u64 ts)
+{
+ for (int idx = 0; idx < VIDEO_MAX_FRAME; idx++) {
+ if (fwht_reqs[idx].ts == ts)
+ return idx;
+ }
+ return -1;
+}
+
+static bool set_fwht_req_by_fd(struct fwht_cframe_hdr *hdr,
+ int req_fd, __u64 last_bf_ts, __u64 ts)
+{
+ struct v4l2_ctrl_fwht_params fwht_params;
+
+ set_fwht_stateless_params(fwht_params, hdr, last_bf_ts);
+
+ for (int idx = 0; idx < VIDEO_MAX_FRAME; idx++) {
+ if (fwht_reqs[idx].fd == req_fd) {
+ fwht_reqs[idx].ts = ts;
+ fwht_reqs[idx].params = fwht_params;
+ return true;
+ }
+ }
+ return false;
+}
+
+static int set_fwht_ext_ctrl(cv4l_fd &fd, struct fwht_cframe_hdr *hdr,
+ __u64 last_bf_ts, int req_fd)
+{
+ v4l2_ext_controls controls;
+ struct v4l2_ext_control control;
+ struct v4l2_ctrl_fwht_params fwht_params;
+
+ memset(&control, 0, sizeof(control));
+ memset(&controls, 0, sizeof(controls));
+
+ set_fwht_stateless_params(fwht_params, hdr, last_bf_ts);
+
+ control.id = V4L2_CID_MPEG_VIDEO_FWHT_PARAMS;
+ control.ptr = &fwht_params;
+ control.size = sizeof(fwht_params);
+ controls.which = V4L2_CTRL_WHICH_REQUEST_VAL;
+ controls.request_fd = req_fd;
+ controls.controls = &control;
+ controls.count = 1;
+ return fd.s_ext_ctrls(controls);
+}
+
static void read_write_padded_frame(cv4l_fmt &fmt, unsigned char *buf,
FILE *fpointer, unsigned &sz,
unsigned &len, bool is_read)
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [v4l-utils PATCH v4 3/3] v4l2-ctl: Add implementation for the stateless fwht decoder.
2019-02-26 19:28 [v4l-utils PATCH v4 1/3] v4l-utils: copy fwht-ctrls.h from kernel dir Dafna Hirschfeld
2019-02-26 19:28 ` [v4l-utils PATCH v4 2/3] v4l2-ctl: Add functions and variables to support fwht stateless decoder Dafna Hirschfeld
@ 2019-02-26 19:29 ` Dafna Hirschfeld
1 sibling, 0 replies; 3+ messages in thread
From: Dafna Hirschfeld @ 2019-02-26 19:29 UTC (permalink / raw)
To: linux-media; +Cc: hverkuil, helen.koike, Dafna Hirschfeld
Add code to support the stateless decoder
and the function 'stateless_m2m' that implements it.
Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
utils/v4l2-ctl/v4l2-ctl-streaming.cpp | 234 +++++++++++++++++++++++++-
1 file changed, 231 insertions(+), 3 deletions(-)
diff --git a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
index f1a0b0d0..f2704229 100644
--- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
@@ -1072,8 +1072,9 @@ restart:
return false;
}
}
-
- if (support_out_crop && v4l2_fwht_find_pixfmt(fmt.g_pixelformat()))
+ if (q.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_REQUESTS)
+ read_fwht_frame(fmt, (unsigned char *)buf, fin, sz, len);
+ else if (support_out_crop && v4l2_fwht_find_pixfmt(fmt.g_pixelformat()))
read_write_padded_frame(fmt, (unsigned char *)buf, fin, sz, len, true);
else
sz = fread(buf, 1, len, fin);
@@ -1100,6 +1101,21 @@ restart:
return true;
}
+static bool split_fwht_frame(u8 *frame, struct fwht_cframe_hdr *hdr, unsigned max_len)
+{
+ unsigned int len;
+ bool ret = true;
+
+ memcpy(hdr, frame, sizeof(struct fwht_cframe_hdr));
+ len = ntohl(hdr->size);
+ if (len > max_len) {
+ len = max_len;
+ ret = false;
+ }
+ memmove(frame, frame + sizeof(struct fwht_cframe_hdr), len);
+ return ret;
+}
+
static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf)
{
tpg_pixel_aspect aspect = TPG_PIXEL_ASPECT_SQUARE;
@@ -1204,6 +1220,33 @@ static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf
if (fin && !fill_buffer_from_file(fd, q, buf, fmt, fin))
return -2;
+ struct fwht_cframe_hdr hdr;
+
+ if (q.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_REQUESTS) {
+ int media_fd = mi_get_media_fd(fd.g_fd());
+
+ if (!split_fwht_frame((u8 *)q.g_dataptr(buf.g_index(), 0),
+ &hdr, buf.g_length(0)))
+ fprintf(stderr, "%s: warning: size field in fwht header is larger than buf size\n",
+ __func__);
+
+ if (media_fd < 0) {
+ fprintf(stderr, "%s: mi_get_media_fd failed\n", __func__);
+ return media_fd;
+ }
+
+ if (alloc_fwht_req(media_fd, i))
+ return -1;
+ buf.s_request_fd(fwht_reqs[i].fd);
+ buf.or_flags(V4L2_BUF_FLAG_REQUEST_FD);
+
+ if (set_fwht_ext_ctrl(fd, &hdr, last_fwht_bf_ts,
+ buf.g_request_fd())) {
+ fprintf(stderr, "%s: set_fwht_ext_ctrls failed on %dth buf: %s\n",
+ __func__, i, strerror(errno));
+ return -1;
+ }
+ }
if (qbuf) {
set_time_stamp(buf);
if (fd.qbuf(buf))
@@ -1213,6 +1256,16 @@ static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf
fprintf(stderr, ">");
fflush(stderr);
}
+ if (q.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_REQUESTS) {
+ set_fwht_req_by_idx(i, &hdr,
+ last_fwht_bf_ts, get_ns_timestamp(buf));
+ last_fwht_bf_ts = get_ns_timestamp(buf);
+ if (ioctl(buf.g_request_fd(), MEDIA_REQUEST_IOC_QUEUE) < 0) {
+ fprintf(stderr, "Unable to queue media request: %s\n",
+ strerror(errno));
+ return -1;
+ }
+ }
}
if (qbuf)
output_field = field;
@@ -1451,12 +1504,48 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap
(u8 *)q.g_dataptr(buf.g_index(), j));
}
+ struct fwht_cframe_hdr hdr;
+
+ if (q.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_REQUESTS) {
+ if (ioctl(buf.g_request_fd(), MEDIA_REQUEST_IOC_REINIT, NULL)) {
+ fprintf(stderr, "Unable to reinit media request: %s\n",
+ strerror(errno));
+ return -1;
+ }
+ if (!split_fwht_frame((u8 *)q.g_dataptr(buf.g_index(), 0), &hdr, buf.g_length(0)))
+ fprintf(stderr, "%s: warning: size field in fwht header is larger than buf size\n",
+ __func__);
+
+ if (set_fwht_ext_ctrl(fd, &hdr, last_fwht_bf_ts,
+ buf.g_request_fd())) {
+ fprintf(stderr, "%s: set_fwht_ext_ctrls failed: %s\n",
+ __func__, strerror(errno));
+ return -1;
+ }
+ }
+
set_time_stamp(buf);
if (fd.qbuf(buf)) {
fprintf(stderr, "%s: failed: %s\n", "VIDIOC_QBUF", strerror(errno));
return -1;
}
+ if (q.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_REQUESTS) {
+ if (!set_fwht_req_by_fd(&hdr, buf.g_request_fd(), last_fwht_bf_ts,
+ get_ns_timestamp(buf))) {
+ fprintf(stderr, "%s: request for fd %d does not exist\n",
+ __func__, buf.g_request_fd());
+ return -1;
+ }
+
+ last_fwht_bf_ts = get_ns_timestamp(buf);
+ if (ioctl(buf.g_request_fd(), MEDIA_REQUEST_IOC_QUEUE) < 0) {
+ fprintf(stderr, "Unable to queue media request: %s\n",
+ strerror(errno));
+ return -1;
+ }
+ }
+
tpg_update_mv_count(&tpg, V4L2_FIELD_HAS_T_OR_B(output_field));
if (!verbose)
@@ -2245,6 +2334,140 @@ static void stateful_m2m(cv4l_fd &fd, cv4l_queue &in, cv4l_queue &out,
tpg_free(&tpg);
}
+static void stateless_m2m(cv4l_fd &fd, cv4l_queue &in, cv4l_queue &out,
+ FILE *fin, FILE *fout, cv4l_fd *exp_fd_p)
+{
+ fps_timestamps fps_ts[2];
+ unsigned count[2] = { 0, 0 };
+ cv4l_fmt fmt[2];
+ int fd_flags = fcntl(fd.g_fd(), F_GETFL);
+
+ fd.g_fmt(fmt[OUT], out.g_type());
+ fd.g_fmt(fmt[CAP], in.g_type());
+
+ if (out.reqbufs(&fd, reqbufs_count_out)) {
+ fprintf(stderr, "%s: out.reqbufs failed\n", __func__);
+ return;
+ }
+
+ if (in.reqbufs(&fd, reqbufs_count_cap)) {
+ fprintf(stderr, "%s: in.reqbufs failed\n", __func__);
+ return;
+ }
+
+ if (exp_fd_p && in.export_bufs(exp_fd_p, exp_fd_p->g_type()))
+ return;
+
+ if (in.obtain_bufs(&fd)) {
+ fprintf(stderr, "%s: in.obtain_bufs error\n", __func__);
+ return;
+ }
+
+ if (do_setup_out_buffers(fd, out, fout, true) == -1) {
+ fprintf(stderr, "%s: do_setup_out_buffers failed\n", __func__);
+ return;
+ }
+
+ if (in.queue_all(&fd)) {
+ fprintf(stderr, "%s: in.queue_all failed\n", __func__);
+ return;
+ }
+
+ if (fd.streamon(out.g_type())) {
+ fprintf(stderr, "%s: streamon for out failed\n", __func__);
+ return;
+ }
+
+ if (fd.streamon(in.g_type())) {
+ fprintf(stderr, "%s: streamon for in failed\n", __func__);
+ return;
+ }
+ int index = 0;
+ bool queue_lst_buf = false;
+ cv4l_buffer last_in_buf;
+
+ fcntl(fd.g_fd(), F_SETFL, fd_flags | O_NONBLOCK);
+
+ while (true) {
+ fd_set except_fds;
+ int req_fd =fwht_reqs[index].fd;
+ struct timeval tv = { 2, 0 };
+
+ FD_ZERO(&except_fds);
+ FD_SET(req_fd, &except_fds);
+
+ int rc = select(req_fd + 1, NULL, NULL, &except_fds, &tv);
+
+ if (rc == 0) {
+ fprintf(stderr, "Timeout when waiting for media request\n");
+ return;
+ } else if (rc < 0) {
+ fprintf(stderr, "Unable to select media request: %s\n",
+ strerror(errno));
+ return;
+ }
+ /*
+ * it is safe to queue back last cap buffer only after
+ * the following request is done so that the buffer
+ * is not needed anymore as a reference frame
+ */
+ if (queue_lst_buf) {
+ if (fd.qbuf(last_in_buf) < 0) {
+ fprintf(stderr, "%s: qbuf failed\n", __func__);
+ return;
+ }
+ }
+ int buf_idx = -1;
+ /*
+ * fin is not sent to do_handle_cap since the capture buf is
+ * written to the file in current function
+ */
+ rc = do_handle_cap(fd, in, NULL, &buf_idx, count[CAP],
+ fps_ts[CAP], fmt[CAP]);
+ if (rc) {
+ fprintf(stderr, "%s: do_handle_cap err\n", __func__);
+ return;
+ }
+ /*
+ * in case of an error in the frame, set last ts to 0 as a mean
+ * to recover so that next request will not use a
+ * reference buffer. Otherwise the error flag will be set to
+ * all the future capture buffers.
+ */
+ if (buf_idx == -1) {
+ fprintf(stderr, "%s: frame returned with error\n", __func__);
+ last_fwht_bf_ts = 0;
+ } else {
+ cv4l_buffer cap_buf(in, index);
+ if (fd.querybuf(cap_buf))
+ return;
+ last_in_buf = cap_buf;
+ queue_lst_buf = true;
+ if (fin && cap_buf.g_bytesused(0) &&
+ !(cap_buf.g_flags() & V4L2_BUF_FLAG_ERROR)) {
+ int idx = get_fwht_req_by_ts(get_ns_timestamp(cap_buf));
+
+ if (idx < 0) {
+ fprintf(stderr, "%s: could not find request from buffer\n", __func__);
+ fprintf(stderr, "%s: ts = %llu\n", __func__, get_ns_timestamp(cap_buf));
+ return;
+ }
+ composed_width = fwht_reqs[idx].params.width;
+ composed_height = fwht_reqs[idx].params.height;
+ write_buffer_to_file(fd, in, cap_buf,
+ fmt[CAP], fin);
+ }
+ }
+ rc = do_handle_out(fd, out, fout, NULL, count[OUT],
+ fps_ts[OUT], fmt[OUT]);
+ if (rc) {
+ fprintf(stderr, "%s: output stream ended\n", __func__);
+ close(req_fd);
+ }
+ index = (index + 1) % out.g_buffers();
+ }
+}
+
static void streaming_set_m2m(cv4l_fd &fd, cv4l_fd &exp_fd)
{
cv4l_queue in(fd.g_type(), memory);
@@ -2281,7 +2504,12 @@ static void streaming_set_m2m(cv4l_fd &fd, cv4l_fd &exp_fd)
if (out.export_bufs(&exp_fd, exp_fd.g_type()))
return;
}
- stateful_m2m(fd, in, out, file[CAP], file[OUT], exp_fd_p);
+ if (out.reqbufs(&fd, 0))
+ goto done;
+ if (out.g_capabilities() & V4L2_BUF_CAP_SUPPORTS_REQUESTS)
+ stateless_m2m(fd, in, out, file[CAP], file[OUT], exp_fd_p);
+ else
+ stateful_m2m(fd, in, out, file[CAP], file[OUT], exp_fd_p);
done:
if (options[OptStreamDmaBuf] || options[OptStreamOutDmaBuf])
exp_q.close_exported_fds();
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-02-26 19:29 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-26 19:28 [v4l-utils PATCH v4 1/3] v4l-utils: copy fwht-ctrls.h from kernel dir Dafna Hirschfeld
2019-02-26 19:28 ` [v4l-utils PATCH v4 2/3] v4l2-ctl: Add functions and variables to support fwht stateless decoder Dafna Hirschfeld
2019-02-26 19:29 ` [v4l-utils PATCH v4 3/3] v4l2-ctl: Add implementation for the stateless fwht decoder Dafna Hirschfeld
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