#include <stdio.h> /* FILE */
#include "libavcodec/avcodec.h"
#include "libavutil/dict.h"
+#include "libavutil/log.h"
#include "avio.h"
#include "libavformat/version.h"
struct AVFormatContext;
-/*
- * Public Metadata API.
+/**
+ * @defgroup metadata_api Public Metadata API
+ * @{
* The metadata API allows libavformat to export metadata tags to a client
* application using a sequence of key/value pairs. Like all strings in FFmpeg,
* metadata must be stored as UTF-8 encoded Unicode. Note that metadata
* exported by demuxers isn't checked to be valid UTF-8 in most cases.
* Important concepts to keep in mind:
- * 1. Keys are unique; there can never be 2 tags with the same key. This is
+ * - Keys are unique; there can never be 2 tags with the same key. This is
* also meant semantically, i.e., a demuxer should not knowingly produce
* several keys that are literally different but semantically identical.
* E.g., key=Author5, key=Author6. In this example, all authors must be
* placed in the same tag.
- * 2. Metadata is flat, not hierarchical; there are no subtags. If you
+ * - Metadata is flat, not hierarchical; there are no subtags. If you
* want to store, e.g., the email address of the child of producer Alice
* and actor Bob, that could have key=alice_and_bobs_childs_email_address.
- * 3. Several modifiers can be applied to the tag name. This is done by
+ * - Several modifiers can be applied to the tag name. This is done by
* appending a dash character ('-') and the modifier name in the order
* they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng.
- * a) language -- a tag whose value is localized for a particular language
+ * - language -- a tag whose value is localized for a particular language
* is appended with the ISO 639-2/B 3-letter language code.
* For example: Author-ger=Michael, Author-eng=Mike
* The original/default language is in the unqualified "Author" tag.
* A demuxer should set a default if it sets any translated tag.
- * b) sorting -- a modified version of a tag that should be used for
+ * - sorting -- a modified version of a tag that should be used for
* sorting will have '-sort' appended. E.g. artist="The Beatles",
* artist-sort="Beatles, The".
*
- * 4. Demuxers attempt to export metadata in a generic format, however tags
+ * - 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.
- * e.g. "Various Artists" for compilation albums.
- * artist -- main creator of the work
- * 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.
- * encoded_by -- person/group who created the file.
- * filename -- original name of the file.
- * genre -- <self-evident>.
- * language -- main language in which the work is performed, preferably
- * in ISO 639-2 format. Multiple languages can be specified by
- * separating them with commas.
- * performer -- artist who performed the work, if different from artist.
- * E.g for "Also sprach Zarathustra", artist would be "Richard
- * Strauss" and performer "London Philharmonic Orchestra".
- * publisher -- name of the label/publisher.
- * service_name -- name of the service in broadcasting (channel name).
- * service_provider -- name of the service provider in broadcasting.
- * title -- name of the work.
- * track -- number of this work in the set, can be in form current/total.
- * variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of
+ @verbatim
+ album -- name of the set this work belongs to
+ album_artist -- main creator of the set/album, if different from artist.
+ e.g. "Various Artists" for compilation albums.
+ artist -- main creator of the work
+ 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.
+ encoded_by -- person/group who created the file.
+ filename -- original name of the file.
+ genre -- <self-evident>.
+ language -- main language in which the work is performed, preferably
+ in ISO 639-2 format. Multiple languages can be specified by
+ separating them with commas.
+ performer -- artist who performed the work, if different from artist.
+ E.g for "Also sprach Zarathustra", artist would be "Richard
+ Strauss" and performer "London Philharmonic Orchestra".
+ publisher -- name of the label/publisher.
+ service_name -- name of the service in broadcasting (channel name).
+ service_provider -- name of the service provider in broadcasting.
+ title -- name of the work.
+ track -- number of this work in the set, can be in form current/total.
+ variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of
+ @endverbatim
+ *
+ * Look in the examples section for an application example how to use the Metadata API.
+ *
+ * @}
*/
#if FF_API_OLD_METADATA2
attribute_deprecated unsigned int mpeg2ts_compute_pcr:1;
attribute_deprecated unsigned int initial_pause:1; /**< Do not begin to play the stream
immediately (RTSP only). */
+ attribute_deprecated unsigned int prealloced_context:1;
#endif
- unsigned int prealloced_context:1;
} AVFormatParameters;
//! Demuxer will use avio_open, no opened file should be provided by the caller.
const AVClass *priv_class; ///< AVClass for the private context
+ void (*get_output_timestamp)(struct AVFormatContext *s, int stream,
+ int64_t *dts, int64_t *wall);
+
/* private fields */
struct AVOutputFormat *next;
} AVOutputFormat;
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.
+#if FF_API_AVSTREAM_QUALITY
//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
*/
- float quality;
+ attribute_deprecated float quality;
+#endif
/**
* Decoding: pts of the first frame of the stream, in stream time base.
AVStream **streams;
char filename[1024]; /**< input or output filename */
/* stream info */
- int64_t timestamp;
+#if FF_API_TIMESTAMP
+ /**
+ * @deprecated use 'creation_time' metadata tag instead
+ */
+ attribute_deprecated int64_t timestamp;
+#endif
int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
/* private data for pts handling (do not modify directly). */
int preload;
int max_delay;
+#if FF_API_LOOP_OUTPUT
#define AVFMT_NOOUTPUTLOOP -1
#define AVFMT_INFINITEOUTPUTLOOP 0
/**
* number of times to loop output in formats that support it
+ *
+ * @deprecated use the 'loop' private option in the gif muxer.
*/
- int loop_output;
+ attribute_deprecated int loop_output;
+#endif
int flags;
#define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames.
#if FF_API_FLAG_RTP_HINT
#define AVFMT_FLAG_RTP_HINT 0x0040 ///< Deprecated, use the -movflags rtphint muxer specific AVOption instead
#endif
-#define AVFMT_FLAG_MP4A_LATM 0x0080 ///< Enable RTP MP4A-LATM payload
+#define AVFMT_FLAG_CUSTOM_IO 0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it.
+#define AVFMT_FLAG_MP4A_LATM 0x8000 ///< Enable RTP MP4A-LATM payload
#define AVFMT_FLAG_SORT_DTS 0x10000 ///< try to interleave outputted packets by dts (using this flag can slow demuxing down)
#define AVFMT_FLAG_PRIV_OPT 0x20000 ///< Enable use of private options by delaying codec open (this could be made default once all code is converted)
#define AVFMT_FLAG_KEEP_SIDE_DATA 0x40000 ///< Dont merge side data but keep it seperate.
- int loop_input;
+
+#if FF_API_LOOP_INPUT
+ /**
+ * @deprecated, use the 'loop' img2 demuxer private option.
+ */
+ attribute_deprecated int loop_input;
+#endif
/**
* decoding: size of data to probe; encoding: unused.
const char *filename, void *logctx,
unsigned int offset, unsigned int max_probe_size);
+#if FF_API_FORMAT_PARAMETERS
/**
* Allocate all the structures needed to read an input stream.
* This does not open the needed codecs for decoding the stream[s].
+ * @deprecated use avformat_open_input instead.
*/
-int av_open_input_stream(AVFormatContext **ic_ptr,
+attribute_deprecated int av_open_input_stream(AVFormatContext **ic_ptr,
AVIOContext *pb, const char *filename,
AVInputFormat *fmt, AVFormatParameters *ap);
* @param ap Additional parameters needed when opening the file
* (NULL if default).
* @return 0 if OK, AVERROR_xxx otherwise
+ *
+ * @deprecated use avformat_open_input instead.
*/
-int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
+attribute_deprecated int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
AVInputFormat *fmt,
int buf_size,
AVFormatParameters *ap);
+#endif
+
+/**
+ * Open an input stream and read the header. The codecs are not opened.
+ * The stream must be closed with av_close_input_file().
+ *
+ * @param ps Pointer to user-supplied AVFormatContext (allocated by avformat_alloc_context).
+ * May be a pointer to NULL, in which case an AVFormatContext is allocated by this
+ * function and written into ps.
+ * Note that a user-supplied AVFormatContext will be freed on failure.
+ * @param filename Name of the stream to open.
+ * @param fmt If non-NULL, this parameter forces a specific input format.
+ * Otherwise the format is autodetected.
+ * @param options A dictionary filled with AVFormatContext and demuxer-private options.
+ * On return this parameter will be destroyed and replaced with a dict containing
+ * options that were not found. May be NULL.
+ *
+ * @return 0 on success, a negative AVERROR on failure.
+ *
+ * @note If you want to use custom IO, preallocate the format context and set its pb field.
+ */
+int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options);
int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap);
int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat,
const char *format_name, const char *filename);
+#if FF_API_FORMAT_PARAMETERS
/**
* Read packets of a media file to get stream information. This
* is useful for file formats with no headers such as MPEG. This
* @return >=0 if OK, AVERROR_xxx on error
* @todo Let the user decide somehow what information is needed so that
* we do not waste time getting stuff the user does not need.
+ *
+ * @deprecated use avformat_find_stream_info.
*/
int av_find_stream_info(AVFormatContext *ic);
+#endif
+
+/**
+ * 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.
+ * The logical file position is not changed by this function;
+ * examined packets may be buffered for later processing.
+ *
+ * @param ic media file handle
+ * @param options If non-NULL, an ic.nb_streams long array of pointers to
+ * dictionaries, where i-th member contains options for
+ * codec corresponding to i-th stream.
+ * On return each dictionary will be filled with options that were not found.
+ * @return >=0 if OK, AVERROR_xxx on error
+ *
+ * @note this function isn't guaranteed to open all the codecs, so
+ * options being non-empty at return is a perfectly normal behavior.
+ *
+ * @todo Let the user decide somehow what information is needed so that
+ * we do not waste time getting stuff the user does not need.
+ */
+int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options);
/**
* Find the "best" stream in the file.
/**
* media file output
*/
+#if FF_API_FORMAT_PARAMETERS
+/**
+ * @deprecated pass the options to avformat_write_header directly.
+ */
attribute_deprecated int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
+#endif
/**
* Split a URL string into components.
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, must be allocated with avformat_alloc_context().
+ * Its oformat field must be set to the desired output format;
+ * Its pb field must be set to an already openened AVIOContext.
+ * @param options An AVDictionary filled with AVFormatContext and muxer-private options.
+ * On return this parameter will be destroyed and replaced with a dict containing
+ * options that were not found. May be NULL.
+ *
+ * @return 0 on success, negative AVERROR on failure.
+ *
+ * @see av_opt_find, av_dict_set, avio_open, av_oformat_next.
+ */
+int avformat_write_header(AVFormatContext *s, AVDictionary **options);
+
+#if FF_API_FORMAT_PARAMETERS
/**
* Allocate the stream private data and write the stream header to an
* output media file.
*
* @param s media file handle
* @return 0 if OK, AVERROR_xxx on error
+ *
+ * @deprecated use avformat_write_header.
*/
-int av_write_header(AVFormatContext *s);
+attribute_deprecated int av_write_header(AVFormatContext *s);
+#endif
/**
* Write a packet to an output media file.
*/
int av_write_trailer(AVFormatContext *s);
+/**
+ * Get timing information for the data currently output.
+ * The exact meaning of "currently output" depends on the format.
+ * It is mostly relevant for devices that have an internal buffer and/or
+ * work in real time.
+ * @param s media file handle
+ * @param stream stream in the media file
+ * @param dts[out] DTS of the last packet output for the stream, in stream
+ * time_base units
+ * @param wall[out] absolute time when that packet whas output,
+ * in microsecond
+ * @return 0 if OK, AVERROR(ENOSYS) if the format does not support it
+ * Note: some formats or devices may not allow to measure dts and wall
+ * atomically.
+ */
+int av_get_output_timestamp(struct AVFormatContext *s, int stream,
+ int64_t *dts, int64_t *wall);
+
#if FF_API_DUMP_FORMAT
/**
* @deprecated Deprecated in favor of av_dump_format().
projects / ffmpeg / blobdiff