diff options
| author | Wim Taymans <wtaymans@redhat.com> | 2016-07-30 20:35:34 +0200 |
|---|---|---|
| committer | Wim Taymans <wtaymans@redhat.com> | 2016-07-30 20:35:34 +0200 |
| commit | 05829f33e61499793a1e6714bea27941c530e96d (patch) | |
| tree | d3eb761690d955ae71e2830f2c2e25f3d52c9366 /doc | |
| parent | 7cfd1eb8ee93020ef0e897b9983450f8053b5728 (diff) | |
Work on memory allocation
We now only allow per port preallocated buffers. We exchange the index
into the array instead of passing the buffers around. We still use the
refcount to track when a buffer can be reused.
Improve API a little, allow passing the node as the first argument of
the interface call.
Implement alloc_buffer in v4l2 and improve the test.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/design.txt | 42 |
1 files changed, 19 insertions, 23 deletions
diff --git a/doc/design.txt b/doc/design.txt index c534bd0d..f7c3b8e8 100644 --- a/doc/design.txt +++ b/doc/design.txt @@ -395,44 +395,46 @@ communication channel node-update port-update - start-configure + state-configure 2) Set formats S->C CONFIGURE - add-port set-property enumerate ports + add-port + remove-port enumerate formats set-format - end-configure -3) Buffer requirements update C->S BUFFER_REQS +3) Buffer requirements update C->S Update port status - start-alloc + state-ready if enough formats are set -4) Start S->C ALLOC +4) Start S->C READY read port memory requirements add_mem + remove_mem add_buffer - pause/start + remove_buffer + start->streaming -5) Pause S->C PAUSED +5) Pause S->C STREAMING - start/stop + stop-streaming -5) data transfer C->S STARTED +5) data transfer C->S need-input + have-output + add_mem add_buffer process_buffer reuse_buffer remove_buffer remove_mem - have-output - pause/stop 6) data transfer S->C @@ -442,23 +444,17 @@ communication channel reuse_buffer remove_buffer remove_mem - pause/stop 7) format change C->S port-update - start-configure + state-configure 8) format change S->C - Send set-format change on ports - end-configure, back to 3 - -9) stop S->C ALLOC - - remove_buffer - remove_mem + Send set-format change on ports -> READY if new memory requirements + -> RUNNING if all ok -10) clear format S->C CONFIGURE +9) format-change to NULL -> CONFIGURE - format-change to NULL +10) ERROR |