lavf/hlsenc: fix minor grammar inconsistencies in the option help messages

[ffmpeg] / libavformat / internal.h

diff --git a/libavformat/internal.h b/libavformat/internal.h
index 4a9ed53def49597d4c4a6deb5b58b6932959b5f3..c4660bcbdc76b6f8da9be7b3294ab81c348d2b49 100644 (file)
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -292,14 +292,16 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index,
                       int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
 
 /**
- * Set the pts for a given stream. If the new values would be invalid
- * (<= 0), it leaves the AVStream unchanged.
+ * Set the time base and wrapping info for a given stream. This will be used
+ * to interpret the stream's timestamps. If the new time base is invalid
+ * (numerator or denominator are non-positive), it leaves the stream
+ * unchanged.
  *
  * @param s stream
  * @param pts_wrap_bits number of bits effectively used by the pts
- *        (used for wrap control, 33 is the value for MPEG)
- * @param pts_num numerator to convert to seconds (MPEG: 1)
- * @param pts_den denominator to convert to seconds (MPEG: 90000)
+ *        (used for wrap control)
+ * @param pts_num time base numerator
+ * @param pts_den time base denominator
  */
 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
                          unsigned int pts_num, unsigned int pts_den);
@@ -355,6 +357,25 @@ void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
 
 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux);
 
+unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
+
+enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
+
+/**
+ * Select a PCM codec based on the given parameters.
+ *
+ * @param bps     bits-per-sample
+ * @param flt     floating-point
+ * @param be      big-endian
+ * @param sflags  signed flags. each bit corresponds to one byte of bit depth.
+ *                e.g. the 1st bit indicates if 8-bit should be signed or
+ *                unsigned, the 2nd bit indicates if 16-bit should be signed or
+ *                unsigned, etc... This is useful for formats such as WAVE where
+ *                only 8-bit is unsigned and all other bit depths are signed.
+ * @return        a PCM codec id or AV_CODEC_ID_NONE
+ */
+enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
+
 /**
  * Chooses a timebase for muxing the specified stream.
  *