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Add timestamp control to camera preview stream operations.

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At higher levels, SurfaceTextures include timestamp information in
their buffers. For accurate timestamps, they need to be set by the
driver code. This change adds the needed method into
preview_stream_ops.

Timestamp behavior is documented in SurfaceTexture.java, and
system/core/include/window.h, as well as here.

Bug-Id: 5081132
Change-Id: Id285f8e26edecf605444bc4b9e6eea9b224f9d31
This commit is contained in:
Eino-Ville Talvala 2011-07-26 14:08:21 -07:00
parent 080a80212b
commit 7c50e9bad4
1 changed files with 5 additions and 0 deletions
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5
include/hardware/camera.h
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@ -109,6 +109,11 @@ typedef struct preview_stream_ops {
int *count);
int (*lock_buffer)(struct preview_stream_ops* w,
buffer_handle_t* buffer);
// Timestamps are measured in nanoseconds, and must be comparable
// and monotonically increasing between two frames in the same
// preview stream. They do not need to be comparable between
// consecutive or parallel preview streams, cameras, or app runs.
int (*set_timestamp)(struct preview_stream_ops *w, int64_t timestamp);
} preview_stream_ops_t;
struct camera_device;