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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-22 08:17:01 +00:00
I'm too lazy to comment this
Original commit message from CVS: Some nicer softsync thread work (patch by sjoerd@luon.net)
This commit is contained in:
Sjoerd Simons
Ronald S. Bultje
parent
6581670631
commit
ec25d2a65c
2 changed files with 117 additions and 150 deletions
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@ -64,10 +64,10 @@ struct _GstV4lSrc {
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GCond ** cond_soft_sync;
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/* num of queued frames and some GThread stuff to wait if there's not enough */
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guint16 num_queued_frames;
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guint64 total_queued_frames;
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GMutex * mutex_queued_frames;
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GCond * cond_queued_frames;
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/* True if we want the soft sync thread to stop */
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gboolean quit;
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/* first timestamp */
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guint64 first_timestamp;
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@ -62,6 +62,13 @@ char *palette_name[] = {
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"YUV-4:1:0 (planar)" /* VIDEO_PALETTE_YUV410P */
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};
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#define FRAME_QUEUE_READY -2
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#define FRAME_ERROR -1
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#define FRAME_DONE 0
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/* FRAME_QUEUED is used in frame_queued array */
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#define FRAME_QUEUED 1
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/* FRAME_SOFTSYNCED is used in is_ready_soft array */
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#define FRAME_SYNCED 1
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/******************************************************
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* gst_v4lsrc_queue_frame():
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@ -77,9 +84,7 @@ gst_v4lsrc_queue_frame (GstV4lSrc *v4lsrc,
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v4lsrc->mmap.frame = num;
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if (v4lsrc->frame_queued[num] == -1)
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{
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//v4lsrc->frame_queued[num] = 0;
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if (v4lsrc->frame_queued[num] == FRAME_ERROR) {
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return TRUE;
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}
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@ -91,13 +96,68 @@ gst_v4lsrc_queue_frame (GstV4lSrc *v4lsrc,
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return FALSE;
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}
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v4lsrc->frame_queued[num] = 1;
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v4lsrc->num_queued_frames++;
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v4lsrc->total_queued_frames++;
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v4lsrc->frame_queued[num] = FRAME_QUEUED;
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return TRUE;
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}
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/******************************************************
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* gst_v4lsrc_hard_sync_frame(GstV4lSrc *v4lsrc,gint num)
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* sync a frame and set the timestamp correctly
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*****************************************************/
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static gboolean
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gst_v4lsrc_hard_sync_frame(GstV4lSrc *v4lsrc,gint num) {
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DEBUG("Hardware syncing frame %d",num);
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while (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd, VIDIOCSYNC, &num) < 0) {
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/* if the sync() got interrupted, we can retry */
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if (errno != EINTR) {
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v4lsrc->isready_soft_sync[num] = FRAME_ERROR;
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v4lsrc->frame_queued[num] = FRAME_ERROR;
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gst_element_error(GST_ELEMENT(v4lsrc),
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"Error syncing a buffer (%d): %s",
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num, 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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v4lsrc->frame_queued[num] = FRAME_DONE;
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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gettimeofday(&(v4lsrc->timestamp_soft_sync[num]), NULL);
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v4lsrc->isready_soft_sync[num] = FRAME_SYNCED;
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g_cond_broadcast(v4lsrc->cond_soft_sync[num]);
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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return TRUE;
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}
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/******************************************************
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* gst_v4lsrc_soft_sync_cleanup()
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* cleans up the v4lsrc structure after an error or
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* exit request and exits the thread
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******************************************************/
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static void
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gst_v4lsrc_soft_sync_cleanup(GstV4lSrc *v4lsrc) {
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int n;
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DEBUG("Software sync thread exiting");
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/* sync all queued buffers */
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for (n=0;n < v4lsrc->mbuf.frames; n++) {
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if (v4lsrc->frame_queued[n] == FRAME_QUEUED) {
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gst_v4lsrc_hard_sync_frame(v4lsrc,n);
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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v4lsrc->isready_soft_sync[n] = FRAME_ERROR;
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g_cond_broadcast(v4lsrc->cond_soft_sync[n]);
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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}
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}
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g_thread_exit(NULL);
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}
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/******************************************************
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* gst_v4lsrc_soft_sync_thread()
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@ -110,134 +170,46 @@ gst_v4lsrc_soft_sync_thread (void *arg)
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{
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GstV4lSrc *v4lsrc = GST_V4LSRC(arg);
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gint frame = 0;
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gint qframe = 0;
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gint nqueued = 0;
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DEBUG("starting software sync thread");
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while (1)
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{
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/* this cycle is non-onbligatory - we just queue frames
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* as they become available, below, we'll wait for queues
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* if we don't have enough of them */
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while (1)
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{
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gint qframe = v4lsrc->total_queued_frames % v4lsrc->mbuf.frames;
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for (;;) {
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/* queue as many frames as we can */
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while (v4lsrc->frame_queued[qframe] == FRAME_QUEUE_READY) {
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if (v4lsrc->quit || !gst_v4lsrc_queue_frame(v4lsrc,qframe)) {
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gst_v4lsrc_soft_sync_cleanup(v4lsrc);
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}
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qframe = (qframe + 1) % v4lsrc->mbuf.frames;
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nqueued++;
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}
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if (nqueued < MIN_BUFFERS_QUEUED) {
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/* not enough frames queued, wait for one to get ready and queue as much
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* as we can again */
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DEBUG("!enough buffers, waiting for frame %d",qframe);
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g_mutex_lock(v4lsrc->mutex_queued_frames);
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if (v4lsrc->frame_queued[qframe] == -2)
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{
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if (!gst_v4lsrc_queue_frame(v4lsrc, qframe))
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{
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if (v4lsrc->quit) {
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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gst_v4lsrc_soft_sync_cleanup(v4lsrc);
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}
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if (!(v4lsrc->frame_queued[qframe] == FRAME_QUEUE_READY)) {
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g_cond_wait(v4lsrc->cond_queued_frames,v4lsrc->mutex_queued_frames);
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}
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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/* note that we use *frame* here, not *qframe* -
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* reason is simple, the thread waiting for us needs
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* to know that we stopped syncing on *this* frame,
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* we didn't even start with qframe yet */
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v4lsrc->isready_soft_sync[frame] = -1;
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g_cond_broadcast(v4lsrc->cond_soft_sync[frame]);
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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goto end;
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} else {
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if (!gst_v4lsrc_hard_sync_frame(v4lsrc,frame))
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gst_v4lsrc_soft_sync_cleanup(v4lsrc);
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frame = (frame + 1) % v4lsrc->mbuf.frames;
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nqueued--;
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}
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}
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else {
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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break;
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}
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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}
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/* are there queued frames left? */
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while (v4lsrc->num_queued_frames < MIN_BUFFERS_QUEUED)
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{
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gint qframe = v4lsrc->total_queued_frames % v4lsrc->mbuf.frames;
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g_mutex_lock(v4lsrc->mutex_queued_frames);
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if (v4lsrc->frame_queued[frame] == -1) {
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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break;
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}
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DEBUG("Waiting for new frames to be queued (%d < %d, frame=%d)",
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v4lsrc->num_queued_frames, MIN_BUFFERS_QUEUED, qframe);
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/* sleep for new buffers to be completed encoding. After that,
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* requeue them so we have more than MIN_QUEUES_NEEDED buffers
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* free */
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while (v4lsrc->frame_queued[qframe] != -2)
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{
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g_cond_wait(v4lsrc->cond_queued_frames,
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v4lsrc->mutex_queued_frames);
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if (v4lsrc->frame_queued[qframe] == -1) {
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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goto end;
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}
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}
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if (!gst_v4lsrc_queue_frame(v4lsrc, qframe))
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{
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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/* note that we use *frame* here, not *qframe* -
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* reason is simple, the thread waiting for us needs
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* to know that we stopped syncing on *this* frame,
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* we didn't even start with qframe yet */
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v4lsrc->isready_soft_sync[frame] = -1;
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g_cond_broadcast(v4lsrc->cond_soft_sync[frame]);
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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goto end;
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}
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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}
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if (!v4lsrc->num_queued_frames)
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{
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DEBUG("Got signal to exit...");
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goto end;
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}
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/* sync on the frame */
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DEBUG("Sync\'ing on frame %d", frame);
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retry:
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if (ioctl(GST_V4LELEMENT(v4lsrc)->video_fd, VIDIOCSYNC, &frame) < 0)
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{
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/* if the sync() got interrupted, we can retry */
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if (errno == EINTR)
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goto retry;
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gst_element_error(GST_ELEMENT(v4lsrc),
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"Error syncing on a buffer (%d): %s",
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frame, g_strerror(errno));
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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v4lsrc->isready_soft_sync[frame] = -1;
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g_cond_broadcast(v4lsrc->cond_soft_sync[frame]);
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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goto end;
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}
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else
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{
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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gettimeofday(&(v4lsrc->timestamp_soft_sync[frame]), NULL);
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v4lsrc->isready_soft_sync[frame] = 1;
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g_cond_broadcast(v4lsrc->cond_soft_sync[frame]);
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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}
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g_mutex_lock(v4lsrc->mutex_queued_frames);
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v4lsrc->num_queued_frames--;
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v4lsrc->frame_queued[frame] = 0;
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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frame = (frame+1)%v4lsrc->mbuf.frames;
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}
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end:
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DEBUG("Software sync thread got signalled to exit");
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g_thread_exit(NULL);
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return NULL;
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g_assert_not_reached();
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}
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@ -251,23 +223,25 @@ static gboolean
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gst_v4lsrc_sync_next_frame (GstV4lSrc *v4lsrc,
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gint *num)
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{
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*num = v4lsrc->sync_frame = (v4lsrc->sync_frame + 1)%v4lsrc->mbuf.frames;
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*num = v4lsrc->sync_frame;
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DEBUG("syncing on next frame (%d)", *num);
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/* "software sync()" on the frame */
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g_mutex_lock(v4lsrc->mutex_soft_sync);
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if (v4lsrc->isready_soft_sync[*num] == 0)
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while (v4lsrc->isready_soft_sync[*num] == FRAME_DONE)
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{
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DEBUG("Waiting for frame %d to be synced on", *num);
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g_cond_wait(v4lsrc->cond_soft_sync[*num], v4lsrc->mutex_soft_sync);
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}
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if (v4lsrc->isready_soft_sync[*num] < 0)
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return FALSE;
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v4lsrc->isready_soft_sync[*num] = 0;
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g_mutex_unlock(v4lsrc->mutex_soft_sync);
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if (v4lsrc->isready_soft_sync[*num] != FRAME_SYNCED)
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return FALSE;
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v4lsrc->isready_soft_sync[*num] = FRAME_DONE;
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v4lsrc->sync_frame = (v4lsrc->sync_frame + 1)%v4lsrc->mbuf.frames;
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return TRUE;
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}
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@ -343,8 +317,6 @@ gst_v4lsrc_capture_init (GstV4lSrc *v4lsrc)
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g_strerror(errno));
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return FALSE;
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}
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for (n=0;n<v4lsrc->mbuf.frames;n++)
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v4lsrc->frame_queued[n] = 0;
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/* init the GThread stuff */
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v4lsrc->mutex_soft_sync = g_mutex_new();
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@ -356,8 +328,6 @@ gst_v4lsrc_capture_init (GstV4lSrc *v4lsrc)
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g_strerror(errno));
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return FALSE;
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}
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for (n=0;n<v4lsrc->mbuf.frames;n++)
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v4lsrc->isready_soft_sync[n] = 0;
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v4lsrc->timestamp_soft_sync = (struct timeval *)
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malloc(sizeof(struct timeval) * v4lsrc->mbuf.frames);
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if (!v4lsrc->timestamp_soft_sync)
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@ -413,16 +383,14 @@ gst_v4lsrc_capture_start (GstV4lSrc *v4lsrc)
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lsrc));
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GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lsrc));
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v4lsrc->num_queued_frames = 0;
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v4lsrc->total_queued_frames = 0;
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/* queue all buffers, this starts streaming capture */
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for (n=0;n<v4lsrc->mbuf.frames;n++)
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if (!gst_v4lsrc_queue_frame(v4lsrc, n))
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return FALSE;
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v4lsrc->sync_frame = -1;
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v4lsrc->quit = FALSE;
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/* set all buffers ready to queue , this starts streaming capture */
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for (n=0;n<v4lsrc->mbuf.frames;n++) {
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v4lsrc->isready_soft_sync[n] = FRAME_DONE;
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v4lsrc->frame_queued[n] = FRAME_QUEUE_READY;
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}
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v4lsrc->sync_frame = 0;
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/* start the sync() thread (correct timestamps) */
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v4lsrc->thread_soft_sync = g_thread_create(gst_v4lsrc_soft_sync_thread,
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(void *) v4lsrc, TRUE, &error);
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@ -495,8 +463,10 @@ gst_v4lsrc_requeue_frame (GstV4lSrc *v4lsrc, gint num)
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/* mark frame as 'ready to requeue' */
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g_mutex_lock(v4lsrc->mutex_queued_frames);
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v4lsrc->frame_queued[num] = -2;
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v4lsrc->frame_queued[num] = FRAME_QUEUE_READY;
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g_cond_broadcast(v4lsrc->cond_queued_frames);
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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return TRUE;
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@ -512,8 +482,6 @@ gst_v4lsrc_requeue_frame (GstV4lSrc *v4lsrc, gint num)
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gboolean
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gst_v4lsrc_capture_stop (GstV4lSrc *v4lsrc)
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{
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int n;
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DEBUG("stopping capture");
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GST_V4L_CHECK_OPEN(GST_V4LELEMENT(v4lsrc));
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GST_V4L_CHECK_ACTIVE(GST_V4LELEMENT(v4lsrc));
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@ -521,8 +489,7 @@ gst_v4lsrc_capture_stop (GstV4lSrc *v4lsrc)
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/* we actually need to sync on all queued buffers but
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* not on the non-queued ones */
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g_mutex_lock(v4lsrc->mutex_queued_frames);
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for (n=0;n<v4lsrc->mbuf.frames;n++)
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v4lsrc->frame_queued[n] = -1;
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v4lsrc->quit = TRUE;
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g_cond_broadcast(v4lsrc->cond_queued_frames);
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g_mutex_unlock(v4lsrc->mutex_queued_frames);
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