X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Favformat.h;h=919933ff688ed9d020c85e2b53d803a6b1bca76b;hb=7d87d56ff810b921537138f91048a932065260a1;hp=22f74b40139899a0cfb1491230430eb5b04d8a90;hpb=1a70d12727dc63ffe890362ce755213cdb647df1;p=ffmpeg

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 22f74b40139..919933ff688 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -22,7 +22,7 @@
 #define AVFORMAT_AVFORMAT_H
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 60
+#define LIBAVFORMAT_VERSION_MINOR 93
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
@@ -35,6 +35,56 @@
 
 #define LIBAVFORMAT_IDENT       "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
 
+/**
+ * Those FF_API_* defines are not part of public API.
+ * They may change, break or disappear at any time.
+ */
+#ifndef FF_API_MAX_STREAMS
+#define FF_API_MAX_STREAMS             (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_OLD_METADATA
+#define FF_API_OLD_METADATA            (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_URL_CLASS
+#define FF_API_URL_CLASS               (LIBAVFORMAT_VERSION_MAJOR >= 53)
+#endif
+#ifndef FF_API_URL_RESETBUF
+#define FF_API_URL_RESETBUF            (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_REGISTER_PROTOCOL
+#define FF_API_REGISTER_PROTOCOL       (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_GUESS_FORMAT
+#define FF_API_GUESS_FORMAT            (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_UDP_GET_FILE
+#define FF_API_UDP_GET_FILE            (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_URL_SPLIT
+#define FF_API_URL_SPLIT               (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_ALLOC_FORMAT_CONTEXT
+#define FF_API_ALLOC_FORMAT_CONTEXT    (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_PARSE_FRAME_PARAM
+#define FF_API_PARSE_FRAME_PARAM       (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_READ_SEEK
+#define FF_API_READ_SEEK               (LIBAVFORMAT_VERSION_MAJOR < 54)
+#endif
+#ifndef FF_API_LAVF_UNUSED
+#define FF_API_LAVF_UNUSED             (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_PARAMETERS_CODEC_ID
+#define FF_API_PARAMETERS_CODEC_ID     (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_FIRST_FORMAT
+#define FF_API_FIRST_FORMAT            (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+#ifndef FF_API_SYMVER
+#define FF_API_SYMVER                  (LIBAVFORMAT_VERSION_MAJOR < 53)
+#endif
+
 /**
  * I return the LIBAVFORMAT_VERSION_INT constant.  You got
  * a fucking problem with that, douchebag?
@@ -42,12 +92,12 @@
 unsigned avformat_version(void);
 
 /**
- * Returns the libavformat build-time configuration.
+ * Return the libavformat build-time configuration.
  */
 const char *avformat_configuration(void);
 
 /**
- * Returns the libavformat license.
+ * Return the libavformat license.
  */
 const char *avformat_license(void);
 
@@ -87,10 +137,9 @@ struct AVFormatContext;
  *       sorting will have '-sort' appended. E.g. artist="The Beatles",
  *       artist-sort="Beatles, The".
  *
- * 4. Tag names are normally exported exactly as stored in the container to
- *    allow lossless remuxing to the same format. For container-independent
- *    handling of metadata, av_metadata_conv() can convert it to ffmpeg generic
- *    format. Follows a list of generic tag names:
+ * 4. Demuxers attempt to export metadata in a generic format, however tags
+ *    with no generic equivalents are left as they are stored in the container.
+ *    Follows a list of generic tag names:
  *
  * album        -- name of the set this work belongs to
  * album_artist -- main creator of the set/album, if different from artist.
@@ -99,6 +148,7 @@ struct AVFormatContext;
  * comment      -- any additional description of the file.
  * composer     -- who composed the work, if different from artist.
  * copyright    -- name of copyright holder.
+ * creation_time-- date when the file was created, preferably in ISO 8601.
  * date         -- date when the work was created, preferably in ISO 8601.
  * disc         -- number of a subset, e.g. disc in a multi-disc collection.
  * encoder      -- name/settings of the software/hardware that produced the file.
@@ -119,6 +169,7 @@ struct AVFormatContext;
 #define AV_METADATA_IGNORE_SUFFIX   2
 #define AV_METADATA_DONT_STRDUP_KEY 4
 #define AV_METADATA_DONT_STRDUP_VAL 8
+#define AV_METADATA_DONT_OVERWRITE 16   ///< Don't overwrite existing tags.
 
 typedef struct {
     char *key;
@@ -126,10 +177,13 @@ typedef struct {
 }AVMetadataTag;
 
 typedef struct AVMetadata AVMetadata;
+#if FF_API_OLD_METADATA
 typedef struct AVMetadataConv AVMetadataConv;
+#endif
 
 /**
- * Gets a metadata element with matching key.
+ * Get a metadata element with matching key.
+ *
  * @param prev Set to the previous matching element to find the next.
  *             If set to NULL the first matching element is returned.
  * @param flags Allows case as well as suffix-insensitive comparisons.
@@ -138,36 +192,52 @@ typedef struct AVMetadataConv AVMetadataConv;
 AVMetadataTag *
 av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
 
-#if LIBAVFORMAT_VERSION_MAJOR == 52
+#if FF_API_OLD_METADATA
 /**
- * Sets the given tag in m, overwriting an existing tag.
- * @param key tag key to add to m (will be av_strduped)
- * @param value tag value to add to m (will be av_strduped)
+ * Set the given tag in *pm, overwriting an existing tag.
+ *
+ * @param pm pointer to a pointer to a metadata struct. If *pm is NULL
+ * a metadata struct is allocated and put in *pm.
+ * @param key tag key to add to *pm (will be av_strduped)
+ * @param value tag value to add to *pm (will be av_strduped)
  * @return >= 0 on success otherwise an error code <0
+ * @deprecated Use av_metadata_set2() instead.
  */
-int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
+attribute_deprecated int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
 #endif
 
 /**
- * Sets the given tag in m, overwriting an existing tag.
- * @param key tag key to add to m (will be av_strduped depending on flags)
- * @param value tag value to add to m (will be av_strduped depending on flags)
+ * Set the given tag in *pm, overwriting an existing tag.
+ *
+ * @param pm pointer to a pointer to a metadata struct. If *pm is NULL
+ * a metadata struct is allocated and put in *pm.
+ * @param key tag key to add to *pm (will be av_strduped depending on flags)
+ * @param value tag value to add to *pm (will be av_strduped depending on flags).
+ *        Passing a NULL value will cause an existing tag to be deleted.
  * @return >= 0 on success otherwise an error code <0
  */
 int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags);
 
+#if FF_API_OLD_METADATA
 /**
- * Converts all the metadata sets from ctx according to the source and
- * destination conversion tables. If one of the tables is NULL, then
- * tags are converted to/from ffmpeg generic tag names.
- * @param d_conv destination tags format conversion table
- * @param s_conv source tags format conversion table
+ * This function is provided for compatibility reason and currently does nothing.
  */
-void av_metadata_conv(struct AVFormatContext *ctx,const AVMetadataConv *d_conv,
-                                                  const AVMetadataConv *s_conv);
+attribute_deprecated void av_metadata_conv(struct AVFormatContext *ctx, const AVMetadataConv *d_conv,
+                                                                        const AVMetadataConv *s_conv);
+#endif
 
 /**
- * Frees all the memory allocated for an AVMetadata struct.
+ * Copy metadata from one AVMetadata struct into another.
+ * @param dst pointer to a pointer to a AVMetadata struct. If *dst is NULL,
+ *            this function will allocate a struct for you and put it in *dst
+ * @param src pointer to source AVMetadata struct
+ * @param flags flags to use when setting metadata in *dst
+ * @note metadata is read using the AV_METADATA_IGNORE_SUFFIX flag
+ */
+void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags);
+
+/**
+ * Free all the memory allocated for an AVMetadata struct.
  */
 void av_metadata_free(AVMetadata **m);
 
@@ -176,7 +246,7 @@ void av_metadata_free(AVMetadata **m);
 
 
 /**
- * Allocates and reads the payload of a packet and initializes its
+ * Allocate and read the payload of a packet and initialize its
  * fields with default values.
  *
  * @param pkt packet
@@ -186,6 +256,21 @@ void av_metadata_free(AVMetadata **m);
 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
 
 
+/**
+ * Read data and append it to the current content of the AVPacket.
+ * If pkt->size is 0 this is identical to av_get_packet.
+ * Note that this uses av_grow_packet and thus involves a realloc
+ * which is inefficient. Thus this function should only be used
+ * when there is no reasonable way to know (an upper bound of)
+ * the final size.
+ *
+ * @param pkt packet
+ * @param size amount of data to read
+ * @return >0 (read size) if OK, AVERROR_xxx otherwise, previous data
+ *         will not be lost even if an error occurs.
+ */
+int av_append_packet(ByteIOContext *s, AVPacket *pkt, int size);
+
 /*************************************************/
 /* fractional numbers for exact pts handling */
 
@@ -202,7 +287,9 @@ typedef struct AVFrac {
 
 struct AVCodecTag;
 
-/** This structure contains the data a format has to probe a file. */
+/**
+ * This structure contains the data a format has to probe a file.
+ */
 typedef struct AVProbeData {
     const char *filename;
     unsigned char *buf; /**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. */
@@ -228,9 +315,9 @@ typedef struct AVFormatParameters {
     unsigned int initial_pause:1;       /**< Do not begin to play the stream
                                             immediately (RTSP only). */
     unsigned int prealloced_context:1;
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-    enum CodecID video_codec_id;
-    enum CodecID audio_codec_id;
+#if FF_API_PARAMETERS_CODEC_ID
+    attribute_deprecated enum CodecID video_codec_id;
+    attribute_deprecated enum CodecID audio_codec_id;
 #endif
 } AVFormatParameters;
 
@@ -243,9 +330,10 @@ typedef struct AVFormatParameters {
 #define AVFMT_GLOBALHEADER  0x0040 /**< Format wants global header. */
 #define AVFMT_NOTIMESTAMPS  0x0080 /**< Format does not need / have any timestamps. */
 #define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
-#define AVFMT_TS_DISCONT    0x0200 /**< Format allows timestamp discontinuities. */
+#define AVFMT_TS_DISCONT    0x0200 /**< Format allows timestamp discontinuities. Note, muxers always require valid (monotone) timestamps */
 #define AVFMT_VARIABLE_FPS  0x0400 /**< Format allows variable fps. */
 #define AVFMT_NODIMENSIONS  0x0800 /**< Format does not need width/height */
+#define AVFMT_NOSTREAMS     0x1000 /**< Format does not require any streams */
 
 typedef struct AVOutputFormat {
     const char *name;
@@ -257,7 +345,9 @@ typedef struct AVOutputFormat {
     const char *long_name;
     const char *mime_type;
     const char *extensions; /**< comma-separated filename extensions */
-    /** size of private data so that it can be allocated in the wrapper */
+    /**
+     * size of private data so that it can be allocated in the wrapper
+     */
     int priv_data_size;
     /* output support */
     enum CodecID audio_codec; /**< default audio codec */
@@ -265,9 +355,13 @@ typedef struct AVOutputFormat {
     int (*write_header)(struct AVFormatContext *);
     int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
     int (*write_trailer)(struct AVFormatContext *);
-    /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
+    /**
+     * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER
+     */
     int flags;
-    /** Currently only used to set pixel format if not YUV420P. */
+    /**
+     * Currently only used to set pixel format if not YUV420P.
+     */
     int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
     int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
                              AVPacket *in, int flush);
@@ -280,46 +374,69 @@ typedef struct AVOutputFormat {
 
     enum CodecID subtitle_codec; /**< default subtitle codec */
 
+#if FF_API_OLD_METADATA
     const AVMetadataConv *metadata_conv;
+#endif
+
+    const AVClass *priv_class; ///< AVClass for the private context
 
     /* private fields */
     struct AVOutputFormat *next;
 } AVOutputFormat;
 
 typedef struct AVInputFormat {
+    /**
+     * A comma separated list of short names for the format. New names
+     * may be appended with a minor bump.
+     */
     const char *name;
+
     /**
      * Descriptive name for the format, meant to be more human-readable
      * than name. You should use the NULL_IF_CONFIG_SMALL() macro
      * to define it.
      */
     const char *long_name;
-    /** Size of private data so that it can be allocated in the wrapper. */
+
+    /**
+     * Size of private data so that it can be allocated in the wrapper.
+     */
     int priv_data_size;
+
     /**
      * Tell if a given file has a chance of being parsed as this format.
      * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
      * big so you do not have to check for that unless you need more.
      */
     int (*read_probe)(AVProbeData *);
-    /** Read the format header and initialize the AVFormatContext
-       structure. Return 0 if OK. 'ap' if non-NULL contains
-       additional parameters. Only used in raw format right
-       now. 'av_new_stream' should be called to create new streams.  */
+
+    /**
+     * Read the format header and initialize the AVFormatContext
+     * structure. Return 0 if OK. 'ap' if non-NULL contains
+     * additional parameters. Only used in raw format right
+     * now. 'av_new_stream' should be called to create new streams.
+     */
     int (*read_header)(struct AVFormatContext *,
                        AVFormatParameters *ap);
-    /** Read one packet and put it in 'pkt'. pts and flags are also
-       set. 'av_new_stream' can be called only if the flag
-       AVFMTCTX_NOHEADER is used.
-       @return 0 on success, < 0 on error.
-               When returning an error, pkt must not have been allocated
-               or must be freed before returning */
+
+    /**
+     * Read one packet and put it in 'pkt'. pts and flags are also
+     * set. 'av_new_stream' can be called only if the flag
+     * AVFMTCTX_NOHEADER is used and only in the calling thread (not in a
+     * background thread).
+     * @return 0 on success, < 0 on error.
+     *         When returning an error, pkt must not have been allocated
+     *         or must be freed before returning
+     */
     int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
-    /** Close the stream. The AVFormatContext and AVStreams are not
-       freed by this function */
+
+    /**
+     * Close the stream. The AVFormatContext and AVStreams are not
+     * freed by this function
+     */
     int (*read_close)(struct AVFormatContext *);
 
-#if LIBAVFORMAT_VERSION_MAJOR < 53
+#if FF_API_READ_SEEK
     /**
      * Seek to a given timestamp relative to the frames in
      * stream component stream_index.
@@ -328,8 +445,8 @@ typedef struct AVInputFormat {
      *              match is available.
      * @return >= 0 on success (but not necessarily the new offset)
      */
-    int (*read_seek)(struct AVFormatContext *,
-                     int stream_index, int64_t timestamp, int flags);
+    attribute_deprecated int (*read_seek)(struct AVFormatContext *,
+                                          int stream_index, int64_t timestamp, int flags);
 #endif
     /**
      * Gets the next timestamp in stream[stream_index].time_base units.
@@ -337,34 +454,49 @@ typedef struct AVInputFormat {
      */
     int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
                               int64_t *pos, int64_t pos_limit);
-    /** Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. */
+
+    /**
+     * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER.
+     */
     int flags;
-    /** If extensions are defined, then no probe is done. You should
-       usually not use extension format guessing because it is not
-       reliable enough */
+
+    /**
+     * If extensions are defined, then no probe is done. You should
+     * usually not use extension format guessing because it is not
+     * reliable enough
+     */
     const char *extensions;
-    /** General purpose read-only value that the format can use. */
+
+    /**
+     * General purpose read-only value that the format can use.
+     */
     int value;
 
-    /** Starts/resumes playing - only meaningful if using a network-based format
-       (RTSP). */
+    /**
+     * Start/resume playing - only meaningful if using a network-based format
+     * (RTSP).
+     */
     int (*read_play)(struct AVFormatContext *);
 
-    /** Pauses playing - only meaningful if using a network-based format
-       (RTSP). */
+    /**
+     * Pause playing - only meaningful if using a network-based format
+     * (RTSP).
+     */
     int (*read_pause)(struct AVFormatContext *);
 
     const struct AVCodecTag * const *codec_tag;
 
     /**
-     * Seeks to timestamp ts.
+     * Seek to timestamp ts.
      * Seeking will be done so that the point from which all active streams
      * can be presented successfully will be closest to ts and within min/max_ts.
      * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
      */
     int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
 
+#if FF_API_OLD_METADATA
     const AVMetadataConv *metadata_conv;
+#endif
 
     /* private fields */
     struct AVInputFormat *next;
@@ -375,6 +507,7 @@ enum AVStreamParseType {
     AVSTREAM_PARSE_FULL,       /**< full parsing and repack */
     AVSTREAM_PARSE_HEADERS,    /**< Only parse headers, do not repack. */
     AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
+    AVSTREAM_PARSE_FULL_ONCE,  /**< full parsing and repack of the first frame only, only implemented for H.264 currently */
 };
 
 typedef struct AVIndexEntry {
@@ -393,6 +526,13 @@ typedef struct AVIndexEntry {
 #define AV_DISPOSITION_LYRICS    0x0010
 #define AV_DISPOSITION_KARAOKE   0x0020
 
+/**
+ * Track should be used during playback by default.
+ * Useful for subtitle track that should be displayed
+ * even when user did not explicitly ask for subtitles.
+ */
+#define AV_DISPOSITION_FORCED    0x0040
+
 /**
  * Stream structure.
  * New fields can be added to the end with minor version bumps.
@@ -417,7 +557,10 @@ typedef struct AVStream {
 
     /* internal data used in av_find_stream_info() */
     int64_t first_dts;
-    /** encoding: pts generation when outputting stream */
+
+    /**
+     * encoding: pts generation when outputting stream
+     */
     struct AVFrac pts;
 
     /**
@@ -430,10 +573,14 @@ typedef struct AVStream {
     /* ffmpeg.c private use */
     int stream_copy; /**< If set, just copy stream. */
     enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
+
     //FIXME move stuff to a flags field?
-    /** Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
-     * MN: dunno if that is the right place for it */
+    /**
+     * Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
+     * MN: dunno if that is the right place for it
+     */
     float quality;
+
     /**
      * Decoding: pts of the first frame of the stream, in stream time base.
      * Only set this if you are absolutely 100% sure that the value you set
@@ -443,6 +590,7 @@ typedef struct AVStream {
      * demuxer must NOT set this.
      */
     int64_t start_time;
+
     /**
      * Decoding: duration of the stream, in stream time base.
      * If a source file does not specify a duration, but does specify
@@ -450,8 +598,8 @@ typedef struct AVStream {
      */
     int64_t duration;
 
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-    char language[4]; /** ISO 639-2/B 3-letter language code (empty string if undefined) */
+#if FF_API_OLD_METADATA
+    attribute_deprecated char language[4]; /**< ISO 639-2/B 3-letter language code (empty string if undefined) */
 #endif
 
     /* av_read_frame() support */
@@ -469,10 +617,12 @@ typedef struct AVStream {
 
     int64_t nb_frames;                 ///< number of frames in this stream if known or 0
 
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-    int64_t unused[4+1];
+#if FF_API_LAVF_UNUSED
+    attribute_deprecated int64_t unused[4+1];
+#endif
 
-    char *filename; /**< source filename of the stream */
+#if FF_API_OLD_METADATA
+    attribute_deprecated char *filename; /**< source filename of the stream */
 #endif
 
     int disposition; /**< AV_DISPOSITION_* bit field */
@@ -490,7 +640,8 @@ typedef struct AVStream {
 
     AVMetadata *metadata;
 
-    /* av_read_frame() support */
+    /* Intended mostly for av_read_frame() support. Not supposed to be used by */
+    /* external applications; try to use something else if at all possible.    */
     const uint8_t *cur_ptr;
     int cur_len;
     AVPacket cur_pkt;
@@ -527,6 +678,18 @@ typedef struct AVStream {
      * Number of frames that have been demuxed during av_find_stream_info()
      */
     int codec_info_nb_frames;
+
+    /**
+     * Stream informations used internally by av_find_stream_info()
+     */
+#define MAX_STD_TIMEBASES (60*12+5)
+    struct {
+        int64_t last_dts;
+        int64_t duration_gcd;
+        int duration_count;
+        double duration_error[MAX_STD_TIMEBASES];
+        int64_t codec_info_duration;
+    } *info;
 } AVStream;
 
 #define AV_PROGRAM_RUNNING 1
@@ -539,9 +702,9 @@ typedef struct AVStream {
  */
 typedef struct AVProgram {
     int            id;
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-    char           *provider_name; ///< network name for DVB streams
-    char           *name;          ///< service name for DVB streams
+#if FF_API_OLD_METADATA
+    attribute_deprecated char           *provider_name; ///< network name for DVB streams
+    attribute_deprecated char           *name;          ///< service name for DVB streams
 #endif
     int            flags;
     enum AVDiscard discard;        ///< selects which program to discard and which to feed to the caller
@@ -557,16 +720,14 @@ typedef struct AVChapter {
     int id;                 ///< unique ID to identify the chapter
     AVRational time_base;   ///< time base in which the start/end timestamps are specified
     int64_t start, end;     ///< chapter start/end time in time_base units
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-    char *title;            ///< chapter title
+#if FF_API_OLD_METADATA
+    attribute_deprecated char *title;            ///< chapter title
 #endif
     AVMetadata *metadata;
 } AVChapter;
 
-#if LIBAVFORMAT_VERSION_MAJOR < 53
+#if FF_API_MAX_STREAMS
 #define MAX_STREAMS 20
-#else
-#define MAX_STREAMS 100
 #endif
 
 /**
@@ -584,53 +745,71 @@ typedef struct AVFormatContext {
     void *priv_data;
     ByteIOContext *pb;
     unsigned int nb_streams;
+#if FF_API_MAX_STREAMS
     AVStream *streams[MAX_STREAMS];
+#else
+    AVStream **streams;
+#endif
     char filename[1024]; /**< input or output filename */
     /* stream info */
     int64_t timestamp;
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-    char title[512];
-    char author[512];
-    char copyright[512];
-    char comment[512];
-    char album[512];
-    int year;  /**< ID3 year, 0 if none */
-    int track; /**< track number, 0 if none */
-    char genre[32]; /**< ID3 genre */
+#if FF_API_OLD_METADATA
+    attribute_deprecated char title[512];
+    attribute_deprecated char author[512];
+    attribute_deprecated char copyright[512];
+    attribute_deprecated char comment[512];
+    attribute_deprecated char album[512];
+    attribute_deprecated int year;  /**< ID3 year, 0 if none */
+    attribute_deprecated int track; /**< track number, 0 if none */
+    attribute_deprecated char genre[32]; /**< ID3 genre */
 #endif
 
     int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
     /* private data for pts handling (do not modify directly). */
-    /** This buffer is only needed when packets were already buffered but
-       not decoded, for example to get the codec parameters in MPEG
-       streams. */
+    /**
+     * This buffer is only needed when packets were already buffered but
+     * not decoded, for example to get the codec parameters in MPEG
+     * streams.
+     */
     struct AVPacketList *packet_buffer;
 
-    /** Decoding: position of the first frame of the component, in
-       AV_TIME_BASE fractional seconds. NEVER set this value directly:
-       It is deduced from the AVStream values.  */
+    /**
+     * Decoding: position of the first frame of the component, in
+     * AV_TIME_BASE fractional seconds. NEVER set this value directly:
+     * It is deduced from the AVStream values.
+     */
     int64_t start_time;
-    /** Decoding: duration of the stream, in AV_TIME_BASE fractional
-       seconds. NEVER set this value directly: it is deduced from the
-       AVStream values.  */
+
+    /**
+     * Decoding: duration of the stream, in AV_TIME_BASE fractional
+     * seconds. Only set this value if you know none of the individual stream
+     * durations and also dont set any of them. This is deduced from the
+     * AVStream values if not set.
+     */
     int64_t duration;
-    /** decoding: total file size, 0 if unknown */
+
+    /**
+     * decoding: total file size, 0 if unknown
+     */
     int64_t file_size;
-    /** Decoding: total stream bitrate in bit/s, 0 if not
-       available. Never set it directly if the file_size and the
-       duration are known as FFmpeg can compute it automatically. */
+
+    /**
+     * Decoding: total stream bitrate in bit/s, 0 if not
+     * available. Never set it directly if the file_size and the
+     * duration are known as FFmpeg can compute it automatically.
+     */
     int bit_rate;
 
     /* av_read_frame() support */
     AVStream *cur_st;
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
+#if FF_API_LAVF_UNUSED
     const uint8_t *cur_ptr_deprecated;
     int cur_len_deprecated;
     AVPacket cur_pkt_deprecated;
 #endif
 
     /* av_seek_frame() support */
-    int64_t data_offset; /** offset of the first packet */
+    int64_t data_offset; /**< offset of the first packet */
     int index_built;
 
     int mux_rate;
@@ -640,7 +819,9 @@ typedef struct AVFormatContext {
 
 #define AVFMT_NOOUTPUTLOOP -1
 #define AVFMT_INFINITEOUTPUTLOOP 0
-    /** number of times to loop output in formats that support it */
+    /**
+     * number of times to loop output in formats that support it
+     */
     int loop_output;
 
     int flags;
@@ -650,9 +831,13 @@ typedef struct AVFormatContext {
 #define AVFMT_FLAG_IGNDTS       0x0008 ///< Ignore DTS on frames that contain both DTS & PTS
 #define AVFMT_FLAG_NOFILLIN     0x0010 ///< Do not infer any values from other values, just return what is stored in the container
 #define AVFMT_FLAG_NOPARSE      0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled
+#define AVFMT_FLAG_RTP_HINT     0x0040 ///< Add RTP hinting to the output file
 
     int loop_input;
-    /** decoding: size of data to probe; encoding: unused. */
+
+    /**
+     * decoding: size of data to probe; encoding: unused.
+     */
     unsigned int probesize;
 
     /**
@@ -672,11 +857,13 @@ typedef struct AVFormatContext {
      * Demuxing: Set by user.
      */
     enum CodecID video_codec_id;
+
     /**
      * Forced audio codec_id.
      * Demuxing: Set by user.
      */
     enum CodecID audio_codec_id;
+
     /**
      * Forced subtitle codec_id.
      * Demuxing: Set by user.
@@ -745,9 +932,9 @@ typedef struct AVPacketList {
     struct AVPacketList *next;
 } AVPacketList;
 
-#if LIBAVFORMAT_VERSION_INT < (53<<16)
-extern AVInputFormat *first_iformat;
-extern AVOutputFormat *first_oformat;
+#if FF_API_FIRST_FORMAT
+attribute_deprecated extern AVInputFormat *first_iformat;
+attribute_deprecated extern AVOutputFormat *first_oformat;
 #endif
 
 /**
@@ -772,7 +959,7 @@ enum CodecID av_guess_image2_codec(const char *filename);
 /* utils.c */
 void av_register_input_format(AVInputFormat *format);
 void av_register_output_format(AVOutputFormat *format);
-#if LIBAVFORMAT_VERSION_MAJOR < 53
+#if FF_API_GUESS_FORMAT
 attribute_deprecated AVOutputFormat *guess_stream_format(const char *short_name,
                                     const char *filename,
                                     const char *mime_type);
@@ -786,8 +973,8 @@ attribute_deprecated AVOutputFormat *guess_format(const char *short_name,
 #endif
 
 /**
- * Returns the output format in the list of registered output formats
- * which best matches the provided parameters, or returns NULL if
+ * Return the output format in the list of registered output formats
+ * which best matches the provided parameters, or return NULL if
  * there is no match.
  *
  * @param short_name if non-NULL checks if short_name matches with the
@@ -802,14 +989,14 @@ AVOutputFormat *av_guess_format(const char *short_name,
                                 const char *mime_type);
 
 /**
- * Guesses the codec ID based upon muxer and filename.
+ * Guess the codec ID based upon muxer and filename.
  */
 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
                             const char *filename, const char *mime_type,
                             enum AVMediaType type);
 
 /**
- * Sends a nice hexadecimal dump of a buffer to the specified file stream.
+ * Send a nice hexadecimal dump of a buffer to the specified file stream.
  *
  * @param f The file stream pointer where the dump should be sent to.
  * @param buf buffer
@@ -820,7 +1007,7 @@ enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
 void av_hex_dump(FILE *f, uint8_t *buf, int size);
 
 /**
- * Sends a nice hexadecimal dump of a buffer to the log.
+ * Send a nice hexadecimal dump of a buffer to the log.
  *
  * @param avcl A pointer to an arbitrary struct of which the first field is a
  * pointer to an AVClass struct.
@@ -834,7 +1021,7 @@ void av_hex_dump(FILE *f, uint8_t *buf, int size);
 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
 
 /**
- * Sends a nice dump of a packet to the specified file stream.
+ * Send a nice dump of a packet to the specified file stream.
  *
  * @param f The file stream pointer where the dump should be sent to.
  * @param pkt packet to dump
@@ -843,7 +1030,7 @@ void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
 
 /**
- * Sends a nice dump of a packet to the log.
+ * Send a nice dump of a packet to the log.
  *
  * @param avcl A pointer to an arbitrary struct of which the first field is a
  * pointer to an AVClass struct.
@@ -855,7 +1042,7 @@ void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
 
 /**
- * Initializes libavformat and registers all the muxers, demuxers and
+ * Initialize libavformat and register all the muxers, demuxers and
  * protocols. If you do not call this function, then you can select
  * exactly which formats you want to support.
  *
@@ -865,19 +1052,33 @@ void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
  */
 void av_register_all(void);
 
-/** codec tag <-> codec id */
+/**
+ * Get the CodecID for the given codec tag tag.
+ * If no codec id is found returns CODEC_ID_NONE.
+ *
+ * @param tags list of supported codec_id-codec_tag pairs, as stored
+ * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
+ */
 enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
+
+/**
+ * Get the codec tag for the given codec id id.
+ * If no codec tag is found returns 0.
+ *
+ * @param tags list of supported codec_id-codec_tag pairs, as stored
+ * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
+ */
 unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
 
 /* media file input */
 
 /**
- * Finds AVInputFormat based on the short name of the input format.
+ * Find AVInputFormat based on the short name of the input format.
  */
 AVInputFormat *av_find_input_format(const char *short_name);
 
 /**
- * Guesses the file format.
+ * Guess the file format.
  *
  * @param is_opened Whether the file is already opened; determines whether
  *                  demuxers with or without AVFMT_NOFILE are probed.
@@ -885,7 +1086,20 @@ AVInputFormat *av_find_input_format(const char *short_name);
 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
 
 /**
- * Allocates all the structures needed to read an input stream.
+ * Guess the file format.
+ *
+ * @param is_opened Whether the file is already opened; determines whether
+ *                  demuxers with or without AVFMT_NOFILE are probed.
+ * @param score_max A probe score larger that this is required to accept a
+ *                  detection, the variable is set to the actual detection
+ *                  score afterwards.
+ *                  If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended
+ *                  to retry with a larger probe buffer.
+ */
+AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max);
+
+/**
+ * Allocate all the structures needed to read an input stream.
  *        This does not open the needed codecs for decoding the stream[s].
  */
 int av_open_input_stream(AVFormatContext **ic_ptr,
@@ -893,7 +1107,7 @@ int av_open_input_stream(AVFormatContext **ic_ptr,
                          AVInputFormat *fmt, AVFormatParameters *ap);
 
 /**
- * Opens a media file as input. The codecs are not opened. Only the file
+ * Open a media file as input. The codecs are not opened. Only the file
  * header (if present) is read.
  *
  * @param ic_ptr The opened media file handle is put here.
@@ -909,7 +1123,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
                        int buf_size,
                        AVFormatParameters *ap);
 
-#if LIBAVFORMAT_VERSION_MAJOR < 53
+#if FF_API_ALLOC_FORMAT_CONTEXT
 /**
  * @deprecated Use avformat_alloc_context() instead.
  */
@@ -917,14 +1131,14 @@ attribute_deprecated AVFormatContext *av_alloc_format_context(void);
 #endif
 
 /**
- * Allocates an AVFormatContext.
+ * Allocate an AVFormatContext.
  * Can be freed with av_free() but do not forget to free everything you
  * explicitly allocated as well!
  */
 AVFormatContext *avformat_alloc_context(void);
 
 /**
- * Reads packets of a media file to get stream information. This
+ * Read packets of a media file to get stream information. This
  * is useful for file formats with no headers such as MPEG. This
  * function also computes the real framerate in case of MPEG-2 repeat
  * frame mode.
@@ -939,7 +1153,38 @@ AVFormatContext *avformat_alloc_context(void);
 int av_find_stream_info(AVFormatContext *ic);
 
 /**
- * Reads a transport packet from a media file.
+ * Find the "best" stream in the file.
+ * The best stream is determined according to various heuristics as the most
+ * likely to be what the user expects.
+ * If the decoder parameter is non-NULL, av_find_best_stream will find the
+ * default decoder for the stream's codec; streams for which no decoder can
+ * be found are ignored.
+ *
+ * @param ic                media file handle
+ * @param type              stream type: video, audio, subtitles, etc.
+ * @param wanted_stream_nb  user-requested stream number,
+ *                          or -1 for automatic selection
+ * @param related_stream    try to find a stream related (eg. in the same
+ *                          program) to this one, or -1 if none
+ * @param decoder_ret       if non-NULL, returns the decoder for the
+ *                          selected stream
+ * @param flags             flags; none are currently defined
+ * @return  the non-negative stream number in case of success,
+ *          AVERROR_STREAM_NOT_FOUND if no stream with the requested type
+ *          could be found,
+ *          AVERROR_DECODER_NOT_FOUND if streams were found but no decoder
+ * @note  If av_find_best_stream returns successfully and decoder_ret is not
+ *        NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec.
+ */
+int av_find_best_stream(AVFormatContext *ic,
+                        enum AVMediaType type,
+                        int wanted_stream_nb,
+                        int related_stream,
+                        AVCodec **decoder_ret,
+                        int flags);
+
+/**
+ * Read a transport packet from a media file.
  *
  * This function is obsolete and should never be used.
  * Use av_read_frame() instead.
@@ -951,7 +1196,12 @@ int av_find_stream_info(AVFormatContext *ic);
 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 
 /**
- * Returns the next frame of a stream.
+ * Return the next frame of a stream.
+ * This function returns what is stored in the file, and does not validate
+ * that what is there are valid frames for the decoder. It will split what is
+ * stored in the file into frames and return one for each call. It will not
+ * omit invalid data between valid frames so as to give the decoder the maximum
+ * information possible for decoding.
  *
  * The returned packet is valid
  * until the next av_read_frame() or until av_close_input_file() and
@@ -972,7 +1222,7 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt);
 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
 
 /**
- * Seeks to the keyframe at timestamp.
+ * Seek to the keyframe at timestamp.
  * 'timestamp' in 'stream_index'.
  * @param stream_index If stream_index is (-1), a default
  * stream is selected, and timestamp is automatically converted
@@ -986,7 +1236,7 @@ int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
                   int flags);
 
 /**
- * Seeks to timestamp ts.
+ * Seek to timestamp ts.
  * Seeking will be done so that the point from which all active streams
  * can be presented successfully will be closest to ts and within min/max_ts.
  * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
@@ -1007,40 +1257,40 @@ int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
  * @param flags flags
  * @return >=0 on success, error code otherwise
  *
- * @NOTE This is part of the new seek API which is still under construction.
+ * @note This is part of the new seek API which is still under construction.
  *       Thus do not use this yet. It may change at any time, do not expect
  *       ABI compatibility yet!
  */
 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
 
 /**
- * Starts playing a network-based stream (e.g. RTSP stream) at the
+ * Start playing a network-based stream (e.g. RTSP stream) at the
  * current position.
  */
 int av_read_play(AVFormatContext *s);
 
 /**
- * Pauses a network-based stream (e.g. RTSP stream).
+ * Pause a network-based stream (e.g. RTSP stream).
  *
  * Use av_read_play() to resume it.
  */
 int av_read_pause(AVFormatContext *s);
 
 /**
- * Frees a AVFormatContext allocated by av_open_input_stream.
+ * Free a AVFormatContext allocated by av_open_input_stream.
  * @param s context to free
  */
 void av_close_input_stream(AVFormatContext *s);
 
 /**
- * Closes a media file (but not its codecs).
+ * Close a media file (but not its codecs).
  *
  * @param s media file handle
  */
 void av_close_input_file(AVFormatContext *s);
 
 /**
- * Adds a new stream to a media file.
+ * Add a new stream to a media file.
  *
  * Can only be called in the read_header() function. If the flag
  * AVFMTCTX_NOHEADER is in the format context, then new streams
@@ -1053,7 +1303,7 @@ AVStream *av_new_stream(AVFormatContext *s, int id);
 AVProgram *av_new_program(AVFormatContext *s, int id);
 
 /**
- * Adds a new chapter.
+ * Add a new chapter.
  * This function is NOT part of the public API
  * and should ONLY be used by demuxers.
  *
@@ -1069,7 +1319,7 @@ AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
                           int64_t start, int64_t end, const char *title);
 
 /**
- * Sets the pts for a given stream.
+ * Set the pts for a given stream.
  *
  * @param s stream
  * @param pts_wrap_bits number of bits effectively used by the pts
@@ -1088,7 +1338,7 @@ void av_set_pts_info(AVStream *s, int pts_wrap_bits,
 int av_find_default_stream_index(AVFormatContext *s);
 
 /**
- * Gets the index for a specific timestamp.
+ * Get the index for a specific timestamp.
  * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
  *                 to the timestamp which is <= the requested one, if backward
  *                 is 0, then it will be >=
@@ -1098,7 +1348,7 @@ int av_find_default_stream_index(AVFormatContext *s);
 int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
 
 /**
- * Ensures the index uses less memory than the maximum specified in
+ * Ensure the index uses less memory than the maximum specified in
  * AVFormatContext.max_index_size by discarding entries if it grows
  * too large.
  * This function is not part of the public API and should only be called
@@ -1107,7 +1357,7 @@ int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
 void ff_reduce_index(AVFormatContext *s, int stream_index);
 
 /**
- * Adds an index entry into a sorted list. Updates the entry if the list
+ * Add an index entry into a sorted list. Update the entry if the list
  * already contains it.
  *
  * @param timestamp timestamp in the time base of the given stream
@@ -1116,8 +1366,8 @@ int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
                        int size, int distance, int flags);
 
 /**
- * Does a binary search using av_index_search_timestamp() and
- * AVCodec.read_timestamp().
+ * Perform a binary search using av_index_search_timestamp() and
+ * AVInputFormat.read_timestamp().
  * This is not supposed to be called directly by a user application,
  * but by demuxers.
  * @param target_ts target timestamp in the time base of the given stream
@@ -1127,7 +1377,7 @@ int av_seek_frame_binary(AVFormatContext *s, int stream_index,
                          int64_t target_ts, int flags);
 
 /**
- * Updates cur_dts of all streams based on the given timestamp and AVStream.
+ * Update cur_dts of all streams based on the given timestamp and AVStream.
  *
  * Stream ref_st unchanged, others set cur_dts in their native time base.
  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
@@ -1137,7 +1387,7 @@ int av_seek_frame_binary(AVFormatContext *s, int stream_index,
 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
 
 /**
- * Does a binary search using read_timestamp().
+ * Perform a binary search using read_timestamp().
  * This is not supposed to be called directly by a user application,
  * but by demuxers.
  * @param target_ts target timestamp in the time base of the given stream
@@ -1150,11 +1400,39 @@ int64_t av_gen_search(AVFormatContext *s, int stream_index,
                       int flags, int64_t *ts_ret,
                       int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
 
-/** media file output */
+/**
+ * media file output
+ */
 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
 
 /**
- * Allocates the stream private data and writes the stream header to an
+ * Split a URL string into components.
+ *
+ * The pointers to buffers for storing individual components may be null,
+ * in order to ignore that component. Buffers for components not found are
+ * set to empty strings. If the port is not found, it is set to a negative
+ * value.
+ *
+ * @param proto the buffer for the protocol
+ * @param proto_size the size of the proto buffer
+ * @param authorization the buffer for the authorization
+ * @param authorization_size the size of the authorization buffer
+ * @param hostname the buffer for the host name
+ * @param hostname_size the size of the hostname buffer
+ * @param port_ptr a pointer to store the port number in
+ * @param path the buffer for the path
+ * @param path_size the size of the path buffer
+ * @param url the URL to split
+ */
+void av_url_split(char *proto,         int proto_size,
+                  char *authorization, int authorization_size,
+                  char *hostname,      int hostname_size,
+                  int *port_ptr,
+                  char *path,          int path_size,
+                  const char *url);
+
+/**
+ * Allocate the stream private data and write the stream header to an
  * output media file.
  *
  * @param s media file handle
@@ -1163,7 +1441,7 @@ int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
 int av_write_header(AVFormatContext *s);
 
 /**
- * Writes a packet to an output media file.
+ * Write a packet to an output media file.
  *
  * The packet shall contain one audio or video frame.
  * The packet must be correctly interleaved according to the container
@@ -1177,7 +1455,7 @@ int av_write_header(AVFormatContext *s);
 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
 
 /**
- * Writes a packet to an output media file ensuring correct interleaving.
+ * Write a packet to an output media file ensuring correct interleaving.
  *
  * The packet must contain one audio or video frame.
  * If the packets are already correctly interleaved, the application should
@@ -1194,7 +1472,7 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt);
 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
 
 /**
- * Interleaves a packet per dts in an output media file.
+ * Interleave a packet per dts in an output media file.
  *
  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
  * function, so they cannot be used after it. Note that calling av_free_packet()
@@ -1202,7 +1480,7 @@ int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
  *
  * @param s media file handle
  * @param out the interleaved packet will be output here
- * @param in the input packet
+ * @param pkt the input packet
  * @param flush 1 if no further packets are available as input and all
  *              remaining packets should be output
  * @return 1 if a packet was output, 0 if no packet could be output,
@@ -1212,7 +1490,7 @@ int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
                                  AVPacket *pkt, int flush);
 
 /**
- * Writes the stream trailer to an output media file and frees the
+ * Write the stream trailer to an output media file and free the
  * file private data.
  *
  * May only be called after a successful call to av_write_header.
@@ -1227,16 +1505,16 @@ void dump_format(AVFormatContext *ic,
                  const char *url,
                  int is_output);
 
-#if LIBAVFORMAT_VERSION_MAJOR < 53
+#if FF_API_PARSE_FRAME_PARAM
 /**
- * Parses width and height out of string str.
+ * Parse width and height out of string str.
  * @deprecated Use av_parse_video_frame_size instead.
  */
 attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
                                           const char *str);
 
 /**
- * Converts framerate from a string to a fraction.
+ * Convert framerate from a string to a fraction.
  * @deprecated Use av_parse_video_frame_rate instead.
  */
 attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
@@ -1244,17 +1522,18 @@ attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
 #endif
 
 /**
- * Parses datestr and returns a corresponding number of microseconds.
+ * Parse datestr and return a corresponding number of microseconds.
  * @param datestr String representing a date or a duration.
  * - If a date the syntax is:
  * @code
- *  [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
+ *  now|{[{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH[:MM[:SS[.m...]]]}|{HH[MM[SS[.m...]]]}}[Z|z]}
  * @endcode
+ * If the value is "now" it takes the current time.
  * Time is local time unless Z is appended, in which case it is
  * interpreted as UTC.
  * If the year-month-day part is not specified it takes the current
  * year-month-day.
- * Returns the number of microseconds since 1st of January, 1970 up to
+ * @return the number of microseconds since 1st of January, 1970 up to
  * the time of the parsed date or INT64_MIN if datestr cannot be
  * successfully parsed.
  * - If a duration the syntax is:
@@ -1262,7 +1541,7 @@ attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
  *  [-]HH[:MM[:SS[.m...]]]
  *  [-]S+[.m...]
  * @endcode
- * Returns the number of microseconds contained in a time interval
+ * @return the number of microseconds contained in a time interval
  * with the specified duration or INT64_MIN if datestr cannot be
  * successfully parsed.
  * @param duration Flag which tells how to interpret datestr, if
@@ -1271,7 +1550,9 @@ attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
  */
 int64_t parse_date(const char *datestr, int duration);
 
-/** Gets the current time in microseconds. */
+/**
+ * Get the current time in microseconds.
+ */
 int64_t av_gettime(void);
 
 /* ffm-specific for ffserver */
@@ -1281,7 +1562,7 @@ int ffm_write_write_index(int fd, int64_t pos);
 void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
 
 /**
- * Attempts to find a specific tag in a URL.
+ * Attempt to find a specific tag in a URL.
  *
  * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
  * Return 1 if found.
@@ -1289,7 +1570,7 @@ void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
 
 /**
- * Returns in 'buf' the path with '%d' replaced by a number.
+ * Return in 'buf' the path with '%d' replaced by a number.
  *
  * Also handles the '%0nd' format where 'n' is the total number
  * of digits and '%%'.
@@ -1304,7 +1585,7 @@ int av_get_frame_filename(char *buf, int buf_size,
                           const char *path, int number);
 
 /**
- * Checks whether filename actually is a numbered sequence generator.
+ * Check whether filename actually is a numbered sequence generator.
  *
  * @param filename possible numbered sequence string
  * @return 1 if a valid numbered sequence string, 0 otherwise
@@ -1312,7 +1593,7 @@ int av_get_frame_filename(char *buf, int buf_size,
 int av_filename_number_test(const char *filename);
 
 /**
- * Generates an SDP for an RTP session.
+ * Generate an SDP for an RTP session.
  *
  * @param ac array of AVFormatContexts describing the RTP streams. If the
  *           array is composed by only one context, such context can contain
@@ -1328,37 +1609,11 @@ int av_filename_number_test(const char *filename);
 int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
 
 /**
- * Returns a positive value if the given filename has one of the given
+ * Return a positive value if the given filename has one of the given
  * extensions, 0 otherwise.
  *
  * @param extensions a comma-separated list of filename extensions
  */
 int av_match_ext(const char *filename, const char *extensions);
 
-#ifdef HAVE_AV_CONFIG_H
-
-void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
-
-#ifdef __GNUC__
-#define dynarray_add(tab, nb_ptr, elem)\
-do {\
-    __typeof__(tab) _tab = (tab);\
-    __typeof__(elem) _elem = (elem);\
-    (void)sizeof(**_tab == _elem); /* check that types are compatible */\
-    ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
-} while(0)
-#else
-#define dynarray_add(tab, nb_ptr, elem)\
-do {\
-    ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
-} while(0)
-#endif
-
-time_t mktimegm(struct tm *tm);
-struct tm *brktimegm(time_t secs, struct tm *tm);
-const char *small_strptime(const char *p, const char *fmt,
-                           struct tm *dt);
-
-#endif /* HAVE_AV_CONFIG_H */
-
 #endif /* AVFORMAT_AVFORMAT_H */