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authorDiego Biurrun <diego@biurrun.de>2005-12-22 01:10:11 +0000
committerDiego Biurrun <diego@biurrun.de>2005-12-22 01:10:11 +0000
commitbb270c0896b39e1ae9277355e3c120ed3feb64a3 (patch)
treefc2fc2b1216d19acb3879abb6ea5a3b400f43fe4 /libavformat/dv1394.h
parent50827fcf44f34521df4708cdb633809b56fb9df3 (diff)
downloadffmpeg-bb270c0896b39e1ae9277355e3c120ed3feb64a3.tar.gz
COSMETICS: tabs --> spaces, some prettyprinting
Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/dv1394.h')
-rw-r--r--libavformat/dv1394.h172
1 files changed, 86 insertions, 86 deletions
diff --git a/libavformat/dv1394.h b/libavformat/dv1394.h
index 18650cddb6..af37f78082 100644
--- a/libavformat/dv1394.h
+++ b/libavformat/dv1394.h
@@ -60,21 +60,21 @@
Example 1:
To play a raw .DV file: cat foo.DV > /dev/dv1394
- (cat will use write() internally)
+ (cat will use write() internally)
Example 2:
static struct dv1394_init init = {
- 0x63, (broadcast channel)
+ 0x63, (broadcast channel)
4, (four-frame ringbuffer)
- DV1394_NTSC, (send NTSC video)
- 0, 0 (default empty packet rate)
+ DV1394_NTSC, (send NTSC video)
+ 0, 0 (default empty packet rate)
}
- ioctl(fd, DV1394_INIT, &init);
+ ioctl(fd, DV1394_INIT, &init);
- while(1) {
- read( <a raw DV file>, buf, DV1394_NTSC_FRAME_SIZE );
- write( <the dv1394 FD>, buf, DV1394_NTSC_FRAME_SIZE );
+ while(1) {
+ read( <a raw DV file>, buf, DV1394_NTSC_FRAME_SIZE );
+ write( <the dv1394 FD>, buf, DV1394_NTSC_FRAME_SIZE );
}
2)
@@ -104,12 +104,12 @@
frame 0 frame 1 frame 2 frame 3
- *--------------------------------------*
+ *--------------------------------------*
| CLEAR | DV data | DV data | CLEAR |
*--------------------------------------*
<ACTIVE>
- transmission goes in this direction --->>>
+ transmission goes in this direction --->>>
The DV hardware is currently transmitting the data in frame 1.
@@ -123,9 +123,9 @@
receive the following values:
n_frames = 4
- active_frame = 1
- first_clear_frame = 3
- n_clear_frames = 2
+ active_frame = 1
+ first_clear_frame = 3
+ n_clear_frames = 2
At this point, you should write new DV data into frame 3 and optionally
frame 0. Then call DV1394_SUBMIT_FRAMES to inform the device that
@@ -170,11 +170,11 @@
ioctl(dv1394_fd, DV1394_GET_STATUS, &status);
- if(status.dropped_frames > 0) {
- reset_dv1394();
+ if(status.dropped_frames > 0) {
+ reset_dv1394();
} else {
for(int i = 0; i < status.n_clear_frames; i++) {
- copy_DV_frame();
+ copy_DV_frame();
}
}
}
@@ -210,51 +210,51 @@
/* ioctl() commands */
enum {
- /* I don't like using 0 as a valid ioctl() */
- DV1394_INVALID = 0,
+ /* I don't like using 0 as a valid ioctl() */
+ DV1394_INVALID = 0,
- /* get the driver ready to transmit video.
- pass a struct dv1394_init* as the parameter (see below),
- or NULL to get default parameters */
- DV1394_INIT,
+ /* get the driver ready to transmit video.
+ pass a struct dv1394_init* as the parameter (see below),
+ or NULL to get default parameters */
+ DV1394_INIT,
- /* stop transmitting video and free the ringbuffer */
- DV1394_SHUTDOWN,
+ /* stop transmitting video and free the ringbuffer */
+ DV1394_SHUTDOWN,
- /* submit N new frames to be transmitted, where
- the index of the first new frame is first_clear_buffer,
- and the index of the last new frame is
- (first_clear_buffer + N) % n_frames */
- DV1394_SUBMIT_FRAMES,
+ /* submit N new frames to be transmitted, where
+ the index of the first new frame is first_clear_buffer,
+ and the index of the last new frame is
+ (first_clear_buffer + N) % n_frames */
+ DV1394_SUBMIT_FRAMES,
- /* block until N buffers are clear (pass N as the parameter)
- Because we re-transmit the last frame on underrun, there
- will at most be n_frames - 1 clear frames at any time */
- DV1394_WAIT_FRAMES,
+ /* block until N buffers are clear (pass N as the parameter)
+ Because we re-transmit the last frame on underrun, there
+ will at most be n_frames - 1 clear frames at any time */
+ DV1394_WAIT_FRAMES,
- /* capture new frames that have been received, where
- the index of the first new frame is first_clear_buffer,
- and the index of the last new frame is
- (first_clear_buffer + N) % n_frames */
- DV1394_RECEIVE_FRAMES,
+ /* capture new frames that have been received, where
+ the index of the first new frame is first_clear_buffer,
+ and the index of the last new frame is
+ (first_clear_buffer + N) % n_frames */
+ DV1394_RECEIVE_FRAMES,
- DV1394_START_RECEIVE,
+ DV1394_START_RECEIVE,
- /* pass a struct dv1394_status* as the parameter (see below) */
- DV1394_GET_STATUS,
+ /* pass a struct dv1394_status* as the parameter (see below) */
+ DV1394_GET_STATUS,
};
enum pal_or_ntsc {
- DV1394_NTSC = 0,
- DV1394_PAL
+ DV1394_NTSC = 0,
+ DV1394_PAL
};
@@ -262,29 +262,29 @@ enum pal_or_ntsc {
/* this is the argument to DV1394_INIT */
struct dv1394_init {
- /* DV1394_API_VERSION */
- unsigned int api_version;
+ /* DV1394_API_VERSION */
+ unsigned int api_version;
- /* isochronous transmission channel to use */
- unsigned int channel;
+ /* isochronous transmission channel to use */
+ unsigned int channel;
- /* number of frames in the ringbuffer. Must be at least 2
- and at most DV1394_MAX_FRAMES. */
- unsigned int n_frames;
+ /* number of frames in the ringbuffer. Must be at least 2
+ and at most DV1394_MAX_FRAMES. */
+ unsigned int n_frames;
- /* send/receive PAL or NTSC video format */
- enum pal_or_ntsc format;
+ /* send/receive PAL or NTSC video format */
+ enum pal_or_ntsc format;
- /* the following are used only for transmission */
+ /* the following are used only for transmission */
- /* set these to zero unless you want a
- non-default empty packet rate (see below) */
- unsigned long cip_n;
- unsigned long cip_d;
+ /* set these to zero unless you want a
+ non-default empty packet rate (see below) */
+ unsigned long cip_n;
+ unsigned long cip_d;
- /* set this to zero unless you want a
- non-default SYT cycle offset (default = 3 cycles) */
- unsigned int syt_offset;
+ /* set this to zero unless you want a
+ non-default SYT cycle offset (default = 3 cycles) */
+ unsigned int syt_offset;
};
/* NOTE: you may only allocate the DV frame ringbuffer once each time
@@ -322,32 +322,32 @@ struct dv1394_init {
struct dv1394_status {
- /* this embedded init struct returns the current dv1394
- parameters in use */
- struct dv1394_init init;
-
- /* the ringbuffer frame that is currently being
- displayed. (-1 if the device is not transmitting anything) */
- int active_frame;
-
- /* index of the first buffer (ahead of active_frame) that
- is ready to be filled with data */
- unsigned int first_clear_frame;
-
- /* how many buffers, including first_clear_buffer, are
- ready to be filled with data */
- unsigned int n_clear_frames;
-
- /* how many times the DV stream has underflowed, overflowed,
- or otherwise encountered an error, since the previous call
- to DV1394_GET_STATUS */
- unsigned int dropped_frames;
-
- /* N.B. The dropped_frames counter is only a lower bound on the actual
- number of dropped frames, with the special case that if dropped_frames
- is zero, then it is guaranteed that NO frames have been dropped
- since the last call to DV1394_GET_STATUS.
- */
+ /* this embedded init struct returns the current dv1394
+ parameters in use */
+ struct dv1394_init init;
+
+ /* the ringbuffer frame that is currently being
+ displayed. (-1 if the device is not transmitting anything) */
+ int active_frame;
+
+ /* index of the first buffer (ahead of active_frame) that
+ is ready to be filled with data */
+ unsigned int first_clear_frame;
+
+ /* how many buffers, including first_clear_buffer, are
+ ready to be filled with data */
+ unsigned int n_clear_frames;
+
+ /* how many times the DV stream has underflowed, overflowed,
+ or otherwise encountered an error, since the previous call
+ to DV1394_GET_STATUS */
+ unsigned int dropped_frames;
+
+ /* N.B. The dropped_frames counter is only a lower bound on the actual
+ number of dropped frames, with the special case that if dropped_frames
+ is zero, then it is guaranteed that NO frames have been dropped
+ since the last call to DV1394_GET_STATUS.
+ */
};