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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Some final fixes for the v4lsrc elements. remove software sync thread (use GST_ELEMENT_THREAD_SUGGESTED instead) make...
Original commit message from CVS: Some final fixes for the v4lsrc elements. * remove software sync thread (use GST_ELEMENT_THREAD_SUGGESTED instead) * make all src elements threadsafe * fix num_buffer argument setting in v4l2src (VIDIOC_S_PARM) * re-add bufsize (RO) for v4lmjpegsrc * fix the A/V sync calculation in all elements (spvf=GST_SECOND/fps, not GST_SECOND*fps) * probably some more crap.... With all this, it actually works quite well. The TODO files describes the next steps in order to make a full-featured video recorder based on these elements and GStreamer (bottom). Making a simple recorder should be fairly easy now, btw.
This commit is contained in:
Ronald S. Bultje
parent
40998b3018
commit
e767ac4c48
4 changed files with 218 additions and 46 deletions
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@ -195,6 +195,8 @@ gst_v4l2src_class_init (GstV4l2SrcClass *klass)
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static void
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gst_v4l2src_init (GstV4l2Src *v4l2src)
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{
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GST_FLAG_SET(GST_ELEMENT(v4l2src), GST_ELEMENT_THREAD_SUGGESTED);
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v4l2src->srcpad = gst_pad_new_from_template(src_template, "src");
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gst_element_add_pad(GST_ELEMENT(v4l2src), v4l2src->srcpad);
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@ -257,14 +259,14 @@ gst_v4l2src_get_fps (GstV4l2Src *v4l2src)
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/* if that failed ... */
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if (!GST_V4L2_IS_OPEN(GST_V4L2ELEMENT(v4l2src)))
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return FALSE;
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return 0.;
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if (!gst_v4l2_get_norm(GST_V4L2ELEMENT(v4l2src), &norm))
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return FALSE;
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return 0.;
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std = ((struct v4l2_standard *) g_list_nth_data(GST_V4L2ELEMENT(v4l2src)->norms, norm));
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fps = std->frameperiod.numerator / std->frameperiod.denominator;
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fps = (1. * std->frameperiod.denominator) / std->frameperiod.numerator;
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return fps;
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}
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@ -643,7 +645,7 @@ gst_v4l2src_srcconnect (GstPad *pad,
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gst_caps_get_int(caps, "width", &w);
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} else {
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int max;
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gst_caps_get_int_range(caps, "width", &w, &max);
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gst_caps_get_int_range(caps, "width", &max, &w);
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}
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}
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if (gst_caps_has_property(caps, "height")) {
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@ -651,7 +653,7 @@ gst_v4l2src_srcconnect (GstPad *pad,
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gst_caps_get_int(caps, "height", &h);
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} else {
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int max;
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gst_caps_get_int_range(caps, "height", &h, &max);
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gst_caps_get_int_range(caps, "height", &max, &h);
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}
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}
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@ -790,14 +792,14 @@ gst_v4l2src_get (GstPad *pad)
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* timeframe. This means that if time - begin_time = X sec,
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* we want to have written X*fps frames. If we've written
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* more - drop, if we've written less - dup... */
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if (v4l2src->handled * fps * GST_SECOND - time >
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1.5 * fps * GST_SECOND) {
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if (v4l2src->handled * (GST_SECOND/fps) - time >
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1.5 * (GST_SECOND/fps)) {
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/* yo dude, we've got too many frames here! Drop! DROP! */
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v4l2src->need_writes--; /* -= (v4l2src->handled - (time / fps)); */
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g_signal_emit(G_OBJECT(v4l2src),
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gst_v4l2src_signals[SIGNAL_FRAME_DROP], 0);
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} else if (v4l2src->handled * fps * GST_SECOND - time <
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-1.5 * fps * GST_SECOND) {
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} else if (v4l2src->handled * (GST_SECOND/fps) - time <
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-1.5 * (GST_SECOND/fps)) {
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/* this means we're lagging far behind */
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v4l2src->need_writes++; /* += ((time / fps) - v4l2src->handled); */
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g_signal_emit(G_OBJECT(v4l2src),
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@ -820,7 +822,7 @@ gst_v4l2src_get (GstPad *pad)
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v4l2src->use_num_times[num] = 1;
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}
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GST_BUFFER_DATA(buf) = GST_V4L2ELEMENT(v4l2src)->buffer[num];
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GST_BUFFER_DATA(buf) = gst_v4l2src_get_buffer(v4l2src, num);
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GST_BUFFER_SIZE(buf) = v4l2src->bufsettings.bytesused;
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if (v4l2src->use_fixed_fps)
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GST_BUFFER_TIMESTAMP(buf) = v4l2src->handled * GST_SECOND / fps;
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@ -831,6 +833,7 @@ gst_v4l2src_get (GstPad *pad)
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v4l2src->handled++;
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g_signal_emit(G_OBJECT(v4l2src),
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gst_v4l2src_signals[SIGNAL_FRAME_CAPTURE], 0);
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return buf;
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}
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@ -1001,7 +1004,7 @@ gst_v4l2src_buffer_free (GstBufferPool *pool,
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return; /* we've already cleaned up ourselves */
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for (n=0;n<v4l2src->breq.count;n++)
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if (GST_BUFFER_DATA(buf) == GST_V4L2ELEMENT(v4l2src)->buffer[n]) {
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if (GST_BUFFER_DATA(buf) == gst_v4l2src_get_buffer(v4l2src, n)) {
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v4l2src->use_num_times[n]--;
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if (v4l2src->use_num_times[n] <= 0) {
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gst_v4l2src_requeue_frame(v4l2src, n);
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@ -52,6 +52,17 @@ struct _GstV4l2Src {
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struct v4l2_requestbuffers breq;
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struct v4l2_format format;
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/* num of queued frames and some GThread stuff
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* to wait if there's not enough */
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gint8 *frame_queue_state;
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GMutex *mutex_queue_state;
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GCond *cond_queue_state;
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gint num_queued;
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gint queue_frame;
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/* True if we want to stop */
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gboolean quit;
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/* A/V sync... frame counter and internal cache */
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gulong handled;
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gint last_frame;
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@ -40,6 +40,12 @@
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#define MAP_FAILED ( (caddr_t) -1 )
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#endif
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enum {
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QUEUE_STATE_ERROR = -1,
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QUEUE_STATE_READY_FOR_QUEUE,
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QUEUE_STATE_QUEUED,
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QUEUE_STATE_SYNCED,
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};
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/******************************************************
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* gst_v4l2src_fill_format_list():
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@ -113,20 +119,28 @@ gst_v4l2src_queue_frame (GstV4l2Src *v4l2src,
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{
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DEBUG("queueing frame %d", num);
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if (v4l2src->frame_queue_state[num] != QUEUE_STATE_READY_FOR_QUEUE) {
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return FALSE;
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}
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v4l2src->bufsettings.index = num;
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd, VIDIOC_QBUF, &v4l2src->bufsettings) < 0) {
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd,
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VIDIOC_QBUF, &v4l2src->bufsettings) < 0) {
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gst_element_error(GST_ELEMENT(v4l2src),
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"Error queueing buffer %d on device %s: %s",
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num, GST_V4L2ELEMENT(v4l2src)->device, g_strerror(errno));
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return FALSE;
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}
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v4l2src->frame_queue_state[num] = QUEUE_STATE_QUEUED;
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v4l2src->num_queued++;
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return TRUE;
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}
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/******************************************************
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* gst_v4lsrc_sync_frame():
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* gst_v4l2src_sync_next_frame():
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* sync on a frame for capturing
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* return value: TRUE on success, FALSE on error
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******************************************************/
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@ -135,15 +149,28 @@ static gboolean
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gst_v4l2src_sync_next_frame (GstV4l2Src *v4l2src,
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gint *num)
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{
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd, VIDIOC_DQBUF, &v4l2src->bufsettings) < 0) {
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gst_element_error(GST_ELEMENT(v4l2src),
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"Error syncing on a buffer on device %s: %s",
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GST_V4L2ELEMENT(v4l2src)->device, g_strerror(errno));
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if (v4l2src->num_queued <= 0) {
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return FALSE;
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}
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while (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd,
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VIDIOC_DQBUF, &v4l2src->bufsettings) < 0) {
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/* if the sync() got interrupted, we can retry */
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if (errno != EINTR) {
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gst_element_error(GST_ELEMENT(v4l2src),
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"Error syncing on a buffer on device %s: %s",
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GST_V4L2ELEMENT(v4l2src)->device, g_strerror(errno));
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return FALSE;
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}
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DEBUG("Sync got interrupted");
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}
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DEBUG("synced on frame %d", v4l2src->bufsettings.index);
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*num = v4l2src->bufsettings.index;
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v4l2src->frame_queue_state[*num] = QUEUE_STATE_SYNCED;
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v4l2src->num_queued--;
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return TRUE;
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}
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@ -205,7 +232,8 @@ gst_v4l2src_set_capture (GstV4l2Src *v4l2src,
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return FALSE;
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}
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return TRUE;
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/* update internal info */
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return gst_v4l2src_get_capture(v4l2src);;
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}
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@ -220,15 +248,28 @@ gst_v4l2src_capture_init (GstV4l2Src *v4l2src)
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{
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gint n;
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gchar *desc = NULL;
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struct v4l2_buffer buf;
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DEBUG("initting the capture system");
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GST_V4L2_CHECK_OPEN(GST_V4L2ELEMENT(v4l2src));
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GST_V4L2_CHECK_NOT_ACTIVE(GST_V4L2ELEMENT(v4l2src));
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/* set num of buffers */
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if (v4l2src->breq.count > MIN_BUFFERS_QUEUED) {
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struct v4l2_streamparm p;
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p.type = v4l2src->format.type;
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/* only if supported */
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd,
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VIDIOC_G_PARM, &p) == 0) {
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p.parm.capture.readbuffers = v4l2src->breq.count;
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ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd,
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VIDIOC_S_PARM, &p);
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}
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}
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/* request buffer info */
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if (v4l2src->breq.count < MIN_BUFFERS_QUEUED)
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v4l2src->breq.count = MIN_BUFFERS_QUEUED;
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v4l2src->breq.type = v4l2src->format.type;
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd, VIDIOC_REQBUFS, &v4l2src->breq) < 0) {
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gst_element_error(GST_ELEMENT(v4l2src),
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@ -255,24 +296,42 @@ gst_v4l2src_capture_init (GstV4l2Src *v4l2src)
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gst_info("Got %d buffers (%s) of size %d KB\n",
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v4l2src->breq.count, desc, v4l2src->format.fmt.pix.sizeimage/1024);
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v4l2src->use_num_times = (gint *) malloc(sizeof(gint) * v4l2src->breq.count);
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if (!v4l2src->use_num_times) {
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gst_element_error(GST_ELEMENT(v4l2src),
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"Error creating sync-use-time tracker: %s",
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g_strerror(errno));
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return FALSE;
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}
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/* keep track of queued buffers */
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v4l2src->frame_queue_state = (gint8 *)
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g_malloc(sizeof(gint8) * v4l2src->breq.count);
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/* track how often to use each frame */
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v4l2src->use_num_times = (gint *)
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g_malloc(sizeof(gint) * v4l2src->breq.count);
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/* lock for the frame_state */
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v4l2src->mutex_queue_state = g_mutex_new();
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v4l2src->cond_queue_state = g_cond_new();
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/* Map the buffers */
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GST_V4L2ELEMENT(v4l2src)->buffer = (guint8 **) g_malloc(sizeof(guint8*) * v4l2src->breq.count);
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GST_V4L2ELEMENT(v4l2src)->buffer = (guint8 **)
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g_malloc(sizeof(guint8 *) * v4l2src->breq.count);
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for (n=0;n<v4l2src->breq.count;n++) {
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GST_V4L2ELEMENT(v4l2src)->buffer[n] = mmap(0, v4l2src->format.fmt.pix.sizeimage,
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PROT_READ|PROT_WRITE, MAP_SHARED, GST_V4L2ELEMENT(v4l2src)->video_fd, v4l2src->format.fmt.pix.sizeimage*n);
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buf.index = n;
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buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd,
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VIDIOC_QUERYBUF, &buf) < 0) {
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gst_element_error(GST_ELEMENT(v4l2src),
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"Failed to get buffer (%d) properties: %s",
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n, g_strerror(errno));
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gst_v4l2src_capture_deinit(v4l2src);
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return FALSE;
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}
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GST_V4L2ELEMENT(v4l2src)->buffer[n] = mmap(0,
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buf.length, PROT_READ|PROT_WRITE, MAP_SHARED,
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GST_V4L2ELEMENT(v4l2src)->video_fd, buf.m.offset);
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if (GST_V4L2ELEMENT(v4l2src)->buffer[n] == MAP_FAILED) {
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gst_element_error(GST_ELEMENT(v4l2src),
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"Error mapping video buffer %d on device %s: %s",
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n, GST_V4L2ELEMENT(v4l2src)->device, g_strerror(errno));
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"Error mapping video buffer (%d) on device %s: %s",
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n, GST_V4L2ELEMENT(v4l2src)->device,
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g_strerror(errno));
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GST_V4L2ELEMENT(v4l2src)->buffer[n] = NULL;
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gst_v4l2src_capture_deinit(v4l2src);
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return FALSE;
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}
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}
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@ -296,10 +355,22 @@ gst_v4l2src_capture_start (GstV4l2Src *v4l2src)
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GST_V4L2_CHECK_OPEN(GST_V4L2ELEMENT(v4l2src));
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GST_V4L2_CHECK_ACTIVE(GST_V4L2ELEMENT(v4l2src));
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/* queue all buffers, this starts streaming capture */
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for (n=0;n<v4l2src->breq.count;n++)
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if (!gst_v4l2src_queue_frame(v4l2src, n))
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g_mutex_lock(v4l2src->mutex_queue_state);
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v4l2src->quit = FALSE;
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v4l2src->num_queued = 0;
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v4l2src->queue_frame = 0;
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/* set all buffers ready to queue , this starts streaming capture */
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for (n=0;n<v4l2src->breq.count;n++) {
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v4l2src->frame_queue_state[n] = QUEUE_STATE_READY_FOR_QUEUE;
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if (!gst_v4l2src_queue_frame(v4l2src, n)) {
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g_mutex_unlock(v4l2src->mutex_queue_state);
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gst_v4l2src_capture_stop(v4l2src);
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return FALSE;
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}
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}
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n = 1;
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if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd, VIDIOC_STREAMON, &n) < 0) {
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gst_element_error(GST_ELEMENT(v4l2src),
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@ -308,6 +379,8 @@ gst_v4l2src_capture_start (GstV4l2Src *v4l2src)
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return FALSE;
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}
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g_mutex_unlock(v4l2src->mutex_queue_state);
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return TRUE;
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}
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@ -327,14 +400,63 @@ gst_v4l2src_grab_frame (GstV4l2Src *v4l2src,
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GST_V4L2_CHECK_OPEN(GST_V4L2ELEMENT(v4l2src));
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GST_V4L2_CHECK_ACTIVE(GST_V4L2ELEMENT(v4l2src));
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g_mutex_lock(v4l2src->mutex_queue_state);
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/* do we have enough frames? */
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while (v4l2src->num_queued < MIN_BUFFERS_QUEUED ||
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v4l2src->frame_queue_state[v4l2src->queue_frame] ==
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QUEUE_STATE_READY_FOR_QUEUE) {
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while (v4l2src->frame_queue_state[v4l2src->queue_frame] !=
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QUEUE_STATE_READY_FOR_QUEUE &&
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!v4l2src->quit) {
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GST_DEBUG(GST_CAT_PLUGIN_INFO,
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"Waiting for frames to become available (%d < %d)",
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v4l2src->num_queued, MIN_BUFFERS_QUEUED);
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g_cond_wait(v4l2src->cond_queue_state,
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v4l2src->mutex_queue_state);
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}
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if (v4l2src->quit) {
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g_mutex_unlock(v4l2src->mutex_queue_state);
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return TRUE; /* it won't get through anyway */
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}
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if (!gst_v4l2src_queue_frame(v4l2src, v4l2src->queue_frame)) {
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g_mutex_unlock(v4l2src->mutex_queue_state);
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return FALSE;
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}
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v4l2src->queue_frame = (v4l2src->queue_frame + 1) % v4l2src->breq.count;
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}
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/* syncing on the buffer grabs it */
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if (!gst_v4l2src_sync_next_frame(v4l2src, num))
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if (!gst_v4l2src_sync_next_frame(v4l2src, num)) {
|
||||
g_mutex_unlock(v4l2src->mutex_queue_state);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
g_mutex_unlock(v4l2src->mutex_queue_state);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
/******************************************************
|
||||
*
|
||||
******************************************************/
|
||||
|
||||
guint8 *
|
||||
gst_v4l2src_get_buffer (GstV4l2Src *v4l2src,
|
||||
gint num)
|
||||
{
|
||||
if (!GST_V4L2_IS_ACTIVE(GST_V4L2ELEMENT(v4l2src)) ||
|
||||
!GST_V4L2_IS_OPEN(GST_V4L2ELEMENT(v4l2src)))
|
||||
return NULL;
|
||||
|
||||
if (num < 0 || num >= v4l2src->breq.count)
|
||||
return NULL;
|
||||
|
||||
return GST_V4L2ELEMENT(v4l2src)->buffer[num];
|
||||
}
|
||||
|
||||
|
||||
/******************************************************
|
||||
* gst_v4l2src_requeue_frame():
|
||||
* re-queue a frame after we're done with the buffer
|
||||
|
|
@ -349,9 +471,23 @@ gst_v4l2src_requeue_frame (GstV4l2Src *v4l2src,
|
|||
GST_V4L2_CHECK_OPEN(GST_V4L2ELEMENT(v4l2src));
|
||||
GST_V4L2_CHECK_ACTIVE(GST_V4L2ELEMENT(v4l2src));
|
||||
|
||||
/* and let's queue the buffer */
|
||||
if (!gst_v4l2src_queue_frame(v4l2src, num))
|
||||
/* mark frame as 'ready to requeue' */
|
||||
g_mutex_lock(v4l2src->mutex_queue_state);
|
||||
|
||||
if (v4l2src->frame_queue_state[num] != QUEUE_STATE_SYNCED) {
|
||||
gst_element_error(GST_ELEMENT(v4l2src),
|
||||
"Invalid state %d (expected %d), can't requeue",
|
||||
v4l2src->frame_queue_state[num],
|
||||
QUEUE_STATE_SYNCED);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
v4l2src->frame_queue_state[num] = QUEUE_STATE_READY_FOR_QUEUE;
|
||||
|
||||
/* let an optional wait know */
|
||||
g_cond_broadcast(v4l2src->cond_queue_state);
|
||||
|
||||
g_mutex_unlock(v4l2src->mutex_queue_state);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
|
@ -372,7 +508,10 @@ gst_v4l2src_capture_stop (GstV4l2Src *v4l2src)
|
|||
GST_V4L2_CHECK_OPEN(GST_V4L2ELEMENT(v4l2src));
|
||||
GST_V4L2_CHECK_ACTIVE(GST_V4L2ELEMENT(v4l2src));
|
||||
|
||||
/* we actually need to sync on all queued buffers but not on the non-queued ones */
|
||||
g_mutex_lock(v4l2src->mutex_queue_state);
|
||||
|
||||
/* we actually need to sync on all queued buffers but not
|
||||
* on the non-queued ones */
|
||||
if (ioctl(GST_V4L2ELEMENT(v4l2src)->video_fd, VIDIOC_STREAMOFF, &n) < 0) {
|
||||
gst_element_error(GST_ELEMENT(v4l2src),
|
||||
"Error stopping streaming capture for %s: %s",
|
||||
|
|
@ -380,6 +519,17 @@ gst_v4l2src_capture_stop (GstV4l2Src *v4l2src)
|
|||
return FALSE;
|
||||
}
|
||||
|
||||
/* make an optional pending wait stop */
|
||||
v4l2src->quit = TRUE;
|
||||
g_cond_broadcast(v4l2src->cond_queue_state);
|
||||
|
||||
/* sync on remaining frames */
|
||||
while (v4l2src->num_queued > 0) {
|
||||
gst_v4l2src_sync_next_frame(v4l2src, &n);
|
||||
}
|
||||
|
||||
g_mutex_unlock(v4l2src->mutex_queue_state);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
|
@ -393,23 +543,29 @@ gst_v4l2src_capture_stop (GstV4l2Src *v4l2src)
|
|||
gboolean
|
||||
gst_v4l2src_capture_deinit (GstV4l2Src *v4l2src)
|
||||
{
|
||||
gint n;
|
||||
|
||||
int n;
|
||||
|
||||
DEBUG("deinitting capture system");
|
||||
GST_V4L2_CHECK_OPEN(GST_V4L2ELEMENT(v4l2src));
|
||||
GST_V4L2_CHECK_ACTIVE(GST_V4L2ELEMENT(v4l2src));
|
||||
|
||||
/* unmap the buffer */
|
||||
for (n=0;n<v4l2src->breq.count;n++) {
|
||||
if (!GST_V4L2ELEMENT(v4l2src)->buffer[n])
|
||||
if (!GST_V4L2ELEMENT(v4l2src)->buffer[n]) {
|
||||
break;
|
||||
munmap(GST_V4L2ELEMENT(v4l2src)->buffer[n], v4l2src->format.fmt.pix.sizeimage);
|
||||
}
|
||||
munmap(GST_V4L2ELEMENT(v4l2src)->buffer[n],
|
||||
v4l2src->format.fmt.pix.sizeimage);
|
||||
GST_V4L2ELEMENT(v4l2src)->buffer[n] = NULL;
|
||||
}
|
||||
|
||||
/* free buffer tracker */
|
||||
g_free(GST_V4L2ELEMENT(v4l2src)->buffer);
|
||||
GST_V4L2ELEMENT(v4l2src)->buffer = NULL;
|
||||
|
||||
free(v4l2src->use_num_times);
|
||||
g_mutex_free(v4l2src->mutex_queue_state);
|
||||
g_cond_free(v4l2src->cond_queue_state);
|
||||
g_free(v4l2src->frame_queue_state);
|
||||
g_free(v4l2src->use_num_times);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -33,6 +33,8 @@ gboolean gst_v4l2src_capture_init (GstV4l2Src *v4l2src);
|
|||
gboolean gst_v4l2src_capture_start (GstV4l2Src *v4l2src);
|
||||
gboolean gst_v4l2src_grab_frame (GstV4l2Src *v4l2src,
|
||||
gint *num);
|
||||
guint8 * gst_v4l2src_get_buffer (GstV4l2Src *v4l2src,
|
||||
gint num);
|
||||
gboolean gst_v4l2src_requeue_frame (GstV4l2Src *v4l2src,
|
||||
gint num);
|
||||
gboolean gst_v4l2src_capture_stop (GstV4l2Src *v4l2src);
|
||||
|
|
|
|||
Loading…
Reference in a new issue