On 2/27/19 8:07 AM, Dafna Hirschfeld wrote:
> Add code to support the stateless decoder
> and the function 'stateless_m2m' that implements it.
>
> Signed-off-by: Dafna Hirschfeld <dafna3@xxxxxxxxx>
> ---
> 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 dd0eeef6..e279b0b5 100644
> --- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
> +++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
> @@ -1071,8 +1071,9 @@ 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);
This looks wrong. This should (I think) test if fmt.g_pixelformat() == V4L2_PIX_FMT_FWHT_STATELESS
and only then call read_fwht_frame().
Right now it would also call this function for e.g. the cedrus driver, which is obviously
wrong.
What is also inefficient is that read_fwht_frame first reads the header in the buffer,
then reads the compressed data after the header. This means that you need to do a
memmove as you do below.
Why not read the header into a global struct fwht_cframe_hdr? Then you don't need a
split_fwht_frame, which is very inefficient.
> + 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);
> @@ -1099,6 +1100,21 @@ 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;
> @@ -1203,6 +1219,33 @@ 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) {
Same thing here, check against V4L2_PIX_FMT_FWHT_STATELESS instead. I won't repeat myself,
so check and replace other occurrences of this.
> + 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))
> @@ -1212,6 +1255,16 @@ 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;
> @@ -1450,12 +1503,48 @@ 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)
> @@ -2244,6 +2333,140 @@ 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);
> @@ -2280,7 +2503,12 @@ 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();
>
Regards,
Hans
