Fix grammar errors in documentation

Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk

3 files changed, 11 insertions, 11 deletions

diff --git a/libavdevice/alsa-audio.h b/libavdevice/alsa-audio.h
index 9a8a089ba6..a90d5e780a 100644
--- a/libavdevice/alsa-audio.h
+++ b/libavdevice/alsa-audio.h
@@ -50,7 +50,7 @@ typedef struct {
 } AlsaData;
 
 /**
- * Opens an ALSA PCM.
+ * Open an ALSA PCM.
  *
  * @param s media file handle
  * @param mode either SND_PCM_STREAM_CAPTURE or SND_PCM_STREAM_PLAYBACK
@@ -68,7 +68,7 @@ int ff_alsa_open(AVFormatContext *s, snd_pcm_stream_t mode,
                  int channels, enum CodecID *codec_id);
 
 /**
- * Closes the ALSA PCM.
+ * Close the ALSA PCM.
  *
  * @param s1 media file handle
  *
@@ -77,7 +77,7 @@ int ff_alsa_open(AVFormatContext *s, snd_pcm_stream_t mode,
 int ff_alsa_close(AVFormatContext *s1);
 
 /**
- * Tries to recover from ALSA buffer underrun.
+ * Try to recover from ALSA buffer underrun.
  *
  * @param s1 media file handle
  * @param err error code reported by the previous ALSA call
diff --git a/libavdevice/avdevice.h b/libavdevice/avdevice.h
index dcd835cb1d..b9c0fd7b83 100644
--- a/libavdevice/avdevice.h
+++ b/libavdevice/avdevice.h
@@ -34,17 +34,17 @@
 #define LIBAVDEVICE_BUILD       LIBAVDEVICE_VERSION_INT
 
 /**
- * Returns the LIBAVDEVICE_VERSION_INT constant.
+ * Return the LIBAVDEVICE_VERSION_INT constant.
  */
 unsigned avdevice_version(void);
 
 /**
- * Returns the libavdevice build-time configuration.
+ * Return the libavdevice build-time configuration.
  */
 const char *avdevice_configuration(void);
 
 /**
- * Returns the libavdevice license.
+ * Return the libavdevice license.
  */
 const char *avdevice_license(void);
 
diff --git a/libavdevice/x11grab.c b/libavdevice/x11grab.c
index 0c4e0c461a..63dc0f74f2 100644
--- a/libavdevice/x11grab.c
+++ b/libavdevice/x11grab.c
@@ -71,7 +71,7 @@ struct x11_grab
 };
 
 /**
- * Initializes the x11 grab device demuxer (public device demuxer API).
+ * Initialize the x11 grab device demuxer (public device demuxer API).
  *
  * @param s1 Context from avformat core
  * @param ap Parameters from avformat core
@@ -238,7 +238,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 }
 
 /**
- * Paints a mouse pointer in an X11 image.
+ * Paint a mouse pointer in an X11 image.
  *
  * @param image image to paint the mouse pointer to
  * @param s context used to retrieve original grabbing rectangle
@@ -288,7 +288,7 @@ paint_mouse_pointer(XImage *image, struct x11_grab *s)
 
 
 /**
- * Reads new data in the image structure.
+ * Read new data in the image structure.
  *
  * @param dpy X11 display to grab from
  * @param d
@@ -335,7 +335,7 @@ xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
 }
 
 /**
- * Grabs a frame from x11 (public device demuxer API).
+ * Grab a frame from x11 (public device demuxer API).
  *
  * @param s1 Context from avformat core
  * @param pkt Packet holding the brabbed frame
@@ -398,7 +398,7 @@ x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
 }
 
 /**
- * Closes x11 frame grabber (public device demuxer API).
+ * Close x11 frame grabber (public device demuxer API).
  *
  * @param s1 Context from avformat core
  * @return 0 success, !0 failure