* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef AVFORMAT_H
-#define AVFORMAT_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define LIBAVFORMAT_VERSION_INT ((51<<16)+(9<<8)+0)
-#define LIBAVFORMAT_VERSION 51.9.0
+#ifndef AVFORMAT_AVFORMAT_H
+#define AVFORMAT_AVFORMAT_H
+
+#define LIBAVFORMAT_VERSION_MAJOR 52
+#define LIBAVFORMAT_VERSION_MINOR 32
+#define LIBAVFORMAT_VERSION_MICRO 0
+
+#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
+ LIBAVFORMAT_VERSION_MINOR, \
+ LIBAVFORMAT_VERSION_MICRO)
+#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_MAJOR, \
+ LIBAVFORMAT_VERSION_MINOR, \
+ LIBAVFORMAT_VERSION_MICRO)
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
+/**
+ * Returns the LIBAVFORMAT_VERSION_INT constant.
+ */
+unsigned avformat_version(void);
+
#include <time.h>
#include <stdio.h> /* FILE */
-#include "avcodec.h"
+#include "libavcodec/avcodec.h"
#include "avio.h"
+struct AVFormatContext;
+
+
+/*
+ * Public Metadata API.
+ * The metadata API allows libavformat to export metadata tags to a client
+ * application using a sequence of key/value pairs.
+ * Important concepts to keep in mind:
+ * 1. 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
+ * 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. A tag whose value is localized for a particular language is appended
+ * with a dash character ('-') and the ISO 639 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.
+ */
+
+#define AV_METADATA_MATCH_CASE 1
+#define AV_METADATA_IGNORE_SUFFIX 2
+
+typedef struct {
+ char *key;
+ char *value;
+}AVMetadataTag;
+
+typedef struct AVMetadata AVMetadata;
+typedef struct AVMetadataConv AVMetadataConv;
+
+/**
+ * Gets a metadata element with matching key.
+ * @param prev Set to the previous matching element to find the next.
+ * @param flags Allows case as well as suffix-insensitive comparisons.
+ * @return Found tag or NULL, changing key or value leads to undefined behavior.
+ */
+AVMetadataTag *
+av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
+
+/**
+ * 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)
+ * @return >= 0 on success otherwise an error code <0
+ */
+int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
+
+/**
+ * Convert all the metadata sets from ctx according to the source and
+ * destination conversion tables.
+ * @param d_conv destination tags format conversion table
+ * @param s_conv source tags format conversion table
+ */
+void av_metadata_conv(struct AVFormatContext *ctx,const AVMetadataConv *d_conv,
+ const AVMetadataConv *s_conv);
+
+/**
+ * Frees all the memory allocated for an AVMetadata struct.
+ */
+void av_metadata_free(AVMetadata **m);
+
+
/* packet functions */
typedef struct AVPacket {
- int64_t pts; ///< presentation time stamp in time_base units
- int64_t dts; ///< decompression time stamp in time_base units
+ /**
+ * Presentation timestamp in time_base units; the time at which the
+ * decompressed packet will be presented to the user.
+ * Can be AV_NOPTS_VALUE if it is not stored in the file.
+ * pts MUST be larger or equal to dts as presentation cannot happen before
+ * decompression, unless one wants to view hex dumps. Some formats misuse
+ * the terms dts and pts/cts to mean something different. Such timestamps
+ * must be converted to true pts/dts before they are stored in AVPacket.
+ */
+ int64_t pts;
+ /**
+ * Decompression timestamp in time_base units; the time at which the
+ * packet is decompressed.
+ * Can be AV_NOPTS_VALUE if it is not stored in the file.
+ */
+ int64_t dts;
uint8_t *data;
int size;
int stream_index;
int flags;
- int duration; ///< presentation duration in time_base units (0 if not available)
+ /**
+ * Duration of this packet in time_base units, 0 if unknown.
+ * Equals next_pts - this_pts in presentation order.
+ */
+ int duration;
void (*destruct)(struct AVPacket *);
void *priv;
int64_t pos; ///< byte position in stream, -1 if unknown
+
+ /**
+ * Time difference in stream time base units from the pts of this
+ * packet to the point at which the output from the decoder has converged
+ * independent from the availability of previous frames. That is, the
+ * frames are virtually identical no matter if decoding started from
+ * the very first frame or from this keyframe.
+ * Is AV_NOPTS_VALUE if unknown.
+ * This field is not the display duration of the current packet.
+ *
+ * The purpose of this field is to allow seeking in streams that have no
+ * keyframes in the conventional sense. It corresponds to the
+ * recovery point SEI in H.264 and match_time_delta in NUT. It is also
+ * essential for some types of subtitle streams to ensure that all
+ * subtitles are correctly displayed after seeking.
+ */
+ int64_t convergence_duration;
} AVPacket;
#define PKT_FLAG_KEY 0x0001
void av_destruct_packet_nofree(AVPacket *pkt);
+
+/**
+ * Default packet destructor.
+ */
void av_destruct_packet(AVPacket *pkt);
-/* initialize optional fields of a packet */
-static inline void av_init_packet(AVPacket *pkt)
-{
- pkt->pts = AV_NOPTS_VALUE;
- pkt->dts = AV_NOPTS_VALUE;
- pkt->pos = -1;
- pkt->duration = 0;
- pkt->flags = 0;
- pkt->stream_index = 0;
- pkt->destruct= av_destruct_packet_nofree;
-}
+/**
+ * Initialize optional fields of a packet with default values.
+ *
+ * @param pkt packet
+ */
+void av_init_packet(AVPacket *pkt);
+/**
+ * Allocate the payload of a packet and initialize its fields with
+ * default values.
+ *
+ * @param pkt packet
+ * @param size wanted payload size
+ * @return 0 if OK, AVERROR_xxx otherwise
+ */
int av_new_packet(AVPacket *pkt, int size);
+
+/**
+ * Allocate and read the payload of a packet and initialize its fields with
+ * default values.
+ *
+ * @param pkt packet
+ * @param size desired payload size
+ * @return >0 (read size) if OK, AVERROR_xxx otherwise
+ */
int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
+
+/**
+ * @warning This is a hack - the packet memory allocation stuff is broken. The
+ * packet is allocated if it was not really allocated.
+ */
int av_dup_packet(AVPacket *pkt);
/**
- * Free a packet
+ * Free a packet.
*
* @param pkt packet to free
*/
/*************************************************/
/* fractional numbers for exact pts handling */
-/* the exact value of the fractional number is: 'val + num / den'. num
- is assumed to be such as 0 <= num < den */
+/**
+ * The exact value of the fractional number is: 'val + num / den'.
+ * num is assumed to be 0 <= num < den.
+ */
typedef struct AVFrac {
int64_t val, num, den;
-} AVFrac attribute_deprecated;
+} AVFrac;
/*************************************************/
/* input/output formats */
struct AVCodecTag;
-struct AVFormatContext;
-
-/* 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;
int buf_size;
} AVProbeData;
-#define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
+#define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection
+#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
typedef struct AVFormatParameters {
AVRational time_base;
int width;
int height;
enum PixelFormat pix_fmt;
- int channel; /* used to select dv channel */
- const char *device; /* video, audio or DV device */
- const char *standard; /* tv standard, NTSC, PAL, SECAM */
- int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
- int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
- stream packet (only meaningful if
- mpeg2ts_raw is TRUE */
- int initial_pause:1; /* do not begin to play the stream
- immediately (RTSP only) */
- int prealloced_context:1;
+ int channel; /**< Used to select DV channel. */
+ const char *standard; /**< TV standard, NTSC, PAL, SECAM */
+ unsigned int mpeg2ts_raw:1; /**< Force raw MPEG-2 transport stream output, if possible. */
+ unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport
+ stream packet (only meaningful if
+ mpeg2ts_raw is TRUE). */
+ 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;
+#endif
} AVFormatParameters;
-//! demuxer will use url_fopen, no opened file should be provided by the caller
+//! Demuxer will use url_fopen, no opened file should be provided by the caller.
#define AVFMT_NOFILE 0x0001
-#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
-#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
-#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
- raw picture data */
-#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
-#define AVFMT_NOTIMESTAMPS 0x0080 /* format doesnt need / has any timestamps */
-#define AVFMT_GENERIC_INDEX 0x0100 /* use generic index building code */
+#define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */
+#define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */
+#define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for
+ raw picture data. */
+#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_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */
typedef struct AVOutputFormat {
const char *name;
+ /**
+ * Descriptive name for the format, meant to be more human-readable
+ * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro
+ * to define it.
+ */
const char *long_name;
const char *mime_type;
- const char *extensions; /* comma separated extensions */
- /* size of private data so that it can be allocated in the wrapper */
+ const char *extensions; /**< comma-separated filename extensions */
+ /** 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 */
- enum CodecID video_codec; /* default video codec */
+ enum CodecID audio_codec; /**< default audio codec */
+ enum CodecID video_codec; /**< default video codec */
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);
+ int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
+ AVPacket *in, int flush);
/**
- * list of supported codec_id-codec_tag pairs, ordered by "better choice first"
- * the arrays are all CODEC_ID_NONE terminated
+ * List of supported codec_id-codec_tag pairs, ordered by "better
+ * choice first". The arrays are all terminated by CODEC_ID_NONE.
*/
- const struct AVCodecTag **codec_tag;
+ const struct AVCodecTag * const *codec_tag;
+
+ enum CodecID subtitle_codec; /**< default subtitle codec */
+
+ const AVMetadataConv *metadata_conv;
/* private fields */
struct AVOutputFormat *next;
typedef struct AVInputFormat {
const char *name;
+ /**
+ * Descriptive name for the format, meant to be more human-readable
+ * than \p name. You \e 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 parsing by this format */
+ /**
+ * 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
- additionnal paramters. Only used in raw format right
+ /** 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
+ /** 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. */
int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
- /* close the stream. The AVFormatContext and AVStreams are not
+ /** Close the stream. The AVFormatContext and AVStreams are not
freed by this function */
int (*read_close)(struct AVFormatContext *);
+
+#if LIBAVFORMAT_VERSION_MAJOR < 53
/**
- * seek to a given timestamp relative to the frames in
- * stream component stream_index
- * @param stream_index must not be -1
- * @param flags selects which direction should be preferred if no exact
- * match is available
+ * Seek to a given timestamp relative to the frames in
+ * stream component stream_index.
+ * @param stream_index Must not be -1.
+ * @param flags Selects which direction should be preferred if no exact
+ * 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);
+#endif
/**
- * gets the next timestamp in AV_TIME_BASE units.
+ * Gets the next timestamp in stream[stream_index].time_base units.
+ * @return the timestamp or AV_NOPTS_VALUE if an error occurred
*/
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
+ /** 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;
- /* start/resume 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 *);
- /* pause 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 **codec_tag;
+ const struct AVCodecTag * const *codec_tag;
+
+ /**
+ * 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);
+
+ const AVMetadataConv *metadata_conv;
/* private fields */
struct AVInputFormat *next;
} AVInputFormat;
+enum AVStreamParseType {
+ AVSTREAM_PARSE_NONE,
+ 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 */
+};
+
typedef struct AVIndexEntry {
int64_t pos;
int64_t timestamp;
#define AVINDEX_KEYFRAME 0x0001
int flags:2;
- int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
- int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
+ int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment).
+ int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
} AVIndexEntry;
+#define AV_DISPOSITION_DEFAULT 0x0001
+#define AV_DISPOSITION_DUB 0x0002
+#define AV_DISPOSITION_ORIGINAL 0x0004
+#define AV_DISPOSITION_COMMENT 0x0008
+#define AV_DISPOSITION_LYRICS 0x0010
+#define AV_DISPOSITION_KARAOKE 0x0020
+
+/**
+ * Stream structure.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVStream) must not be used outside libav*.
+ */
typedef struct AVStream {
- int index; /* stream index in AVFormatContext */
- int id; /* format specific stream id */
- AVCodecContext *codec; /* codec context */
+ int index; /**< stream index in AVFormatContext */
+ int id; /**< format-specific stream ID */
+ AVCodecContext *codec; /**< codec context */
/**
- * real base frame rate of the stream.
- * this is the lowest framerate with which all timestamps can be
- * represented accurately (its the least common multiple of all
- * framerates in the stream), Note, this value is just a guess!
- * for example if the timebase is 1/90000 and all frames have either
- * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
+ * Real base framerate of the stream.
+ * This is the lowest framerate with which all timestamps can be
+ * represented accurately (it is the least common multiple of all
+ * framerates in the stream). Note, this value is just a guess!
+ * For example, if the time base is 1/90000 and all frames have either
+ * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
*/
AVRational r_frame_rate;
void *priv_data;
+
/* internal data used in av_find_stream_info() */
- int64_t codec_info_duration;
- int codec_info_nb_frames;
- /* encoding: PTS generation when outputing stream */
- AVFrac pts;
+ int64_t first_dts;
+ /** encoding: pts generation when outputting stream */
+ struct AVFrac pts;
/**
- * this is the fundamental unit of time (in seconds) in terms
- * of which frame timestamps are represented. for fixed-fps content,
- * timebase should be 1/framerate and timestamp increments should be
- * identically 1.
+ * This is the fundamental unit of time (in seconds) in terms
+ * of which frame timestamps are represented. For fixed-fps content,
+ * time base should be 1/framerate and timestamp increments should be 1.
*/
AVRational time_base;
- int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
+ int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
/* ffmpeg.c private use */
- int stream_copy; /* if TRUE, just copy stream */
- enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
+ 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 thats 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: position of the first frame of the component, in
- AV_TIME_BASE fractional seconds. */
+ /**
+ * 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
+ * it to really is the pts of the first frame.
+ * This may be undefined (AV_NOPTS_VALUE).
+ * @note The ASF header does NOT contain a correct start_time the ASF
+ * demuxer must NOT set this.
+ */
int64_t start_time;
- /* decoding: duration of the stream, in AV_TIME_BASE fractional
- seconds. */
+ /**
+ * Decoding: duration of the stream, in stream time base.
+ * If a source file does not specify a duration, but does specify
+ * a bitrate, this value will be estimated from bitrate and file size.
+ */
int64_t duration;
- char language[4]; /* ISO 639 3-letter language code (empty string if undefined) */
+#if LIBAVFORMAT_VERSION_INT < (53<<16)
+ char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
+#endif
/* av_read_frame() support */
- int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
+ enum AVStreamParseType need_parsing;
struct AVCodecParserContext *parser;
int64_t cur_dts;
int last_IP_duration;
int64_t last_IP_pts;
/* av_seek_frame() support */
- AVIndexEntry *index_entries; /* only used if the format does not
- support seeking natively */
+ AVIndexEntry *index_entries; /**< Only used if the format does not
+ support seeking natively. */
int nb_index_entries;
unsigned int index_entries_allocated_size;
int64_t nb_frames; ///< number of frames in this stream if known or 0
-#define MAX_REORDER_DELAY 4
+#if LIBAVFORMAT_VERSION_INT < (53<<16)
+ int64_t unused[4+1];
+
+ char *filename; /**< source filename of the stream */
+#endif
+
+ int disposition; /**< AV_DISPOSITION_* bit field */
+
+ AVProbeData probe_data;
+#define MAX_REORDER_DELAY 16
int64_t pts_buffer[MAX_REORDER_DELAY+1];
+
+ /**
+ * sample aspect ratio (0 if unknown)
+ * - encoding: Set by user.
+ * - decoding: Set by libavformat.
+ */
+ AVRational sample_aspect_ratio;
+
+ AVMetadata *metadata;
+
+ /* av_read_frame() support */
+ const uint8_t *cur_ptr;
+ int cur_len;
+ AVPacket cur_pkt;
+
+ // Timestamp generation support:
+ /**
+ * Timestamp corresponding to the last dts sync point.
+ *
+ * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
+ * a DTS is received from the underlying container. Otherwise set to
+ * AV_NOPTS_VALUE by default.
+ */
+ int64_t reference_dts;
} AVStream;
-#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
+#define AV_PROGRAM_RUNNING 1
+
+/**
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVProgram) must not be used outside libav*.
+ */
+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
+#endif
+ int flags;
+ enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
+ unsigned int *stream_index;
+ unsigned int nb_stream_indexes;
+ AVMetadata *metadata;
+} AVProgram;
+
+#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
(streams are added dynamically) */
+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
+#endif
+ AVMetadata *metadata;
+} AVChapter;
+
#define MAX_STREAMS 20
-/* format I/O context */
+/**
+ * Format I/O context.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(AVFormatContext) must not be used outside libav*.
+ */
typedef struct AVFormatContext {
- const AVClass *av_class; /* set by av_alloc_format_context */
- /* can only be iformat or oformat, not both at the same time */
+ const AVClass *av_class; /**< Set by avformat_alloc_context. */
+ /* Can only be iformat or oformat, not both at the same time. */
struct AVInputFormat *iformat;
struct AVOutputFormat *oformat;
void *priv_data;
- ByteIOContext pb;
+ ByteIOContext *pb;
unsigned int nb_streams;
AVStream *streams[MAX_STREAMS];
- char filename[1024]; /* input or output filename */
+ 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 */
-
- 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 */
+ int year; /**< ID3 year, 0 if none */
+ int track; /**< track number, 0 if none */
+ 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. */
struct AVPacketList *packet_buffer;
- /* decoding: position of the first frame of the component, in
+ /** 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. */
+ It is deduced from the AVStream values. */
int64_t start_time;
- /* decoding: duration of the stream, in AV_TIME_BASE fractional
+ /** Decoding: duration of the stream, in AV_TIME_BASE fractional
seconds. NEVER set this value directly: it is deduced from the
AVStream values. */
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
+ /** 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. */
+ duration are known as FFmpeg can compute it automatically. */
int bit_rate;
/* av_read_frame() support */
AVStream *cur_st;
- const uint8_t *cur_ptr;
- int cur_len;
- AVPacket cur_pkt;
+#if LIBAVFORMAT_VERSION_INT < (53<<16)
+ 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;
#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;
-#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
-#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
+#define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames.
+#define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index.
+#define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input.
int loop_input;
- /* decoding: size of data to probe; encoding unused */
+ /** decoding: size of data to probe; encoding: unused. */
unsigned int probesize;
/**
- * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info()
+ * Maximum time (in AV_TIME_BASE units) during which the input should
+ * be analyzed in av_find_stream_info().
*/
int max_analyze_duration;
const uint8_t *key;
int keylen;
+
+ unsigned int nb_programs;
+ AVProgram **programs;
+
+ /**
+ * Forced video codec_id.
+ * 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.
+ */
+ enum CodecID subtitle_codec_id;
+
+ /**
+ * Maximum amount of memory in bytes to use for the index of each stream.
+ * If the index exceeds this size, entries will be discarded as
+ * needed to maintain a smaller size. This can lead to slower or less
+ * accurate seeking (depends on demuxer).
+ * Demuxers for which a full in-memory index is mandatory will ignore
+ * this.
+ * muxing : unused
+ * demuxing: set by user
+ */
+ unsigned int max_index_size;
+
+ /**
+ * Maximum amount of memory in bytes to use for buffering frames
+ * obtained from realtime capture devices.
+ */
+ unsigned int max_picture_buffer;
+
+ unsigned int nb_chapters;
+ AVChapter **chapters;
+
+ /**
+ * Flags to enable debugging.
+ */
+ int debug;
+#define FF_FDEBUG_TS 0x0001
+
+ /**
+ * Raw packets from the demuxer, prior to parsing and decoding.
+ * This buffer is used for buffering packets until the codec can
+ * be identified, as parsing cannot be done without knowing the
+ * codec.
+ */
+ struct AVPacketList *raw_packet_buffer;
+ struct AVPacketList *raw_packet_buffer_end;
+
+ struct AVPacketList *packet_buffer_end;
+
+ AVMetadata *metadata;
} AVFormatContext;
typedef struct AVPacketList {
struct AVPacketList *next;
} AVPacketList;
+#if LIBAVFORMAT_VERSION_INT < (53<<16)
extern AVInputFormat *first_iformat;
extern AVOutputFormat *first_oformat;
+#endif
-enum CodecID av_guess_image2_codec(const char *filename);
+/**
+ * If f is NULL, returns the first registered input format,
+ * if f is non-NULL, returns the next registered input format after f
+ * or NULL if f is the last one.
+ */
+AVInputFormat *av_iformat_next(AVInputFormat *f);
-/* XXX: use automatic init with either ELF sections or C file parser */
-/* modules */
+/**
+ * If f is NULL, returns the first registered output format,
+ * if f is non-NULL, returns the next registered output format after f
+ * or NULL if f is the last one.
+ */
+AVOutputFormat *av_oformat_next(AVOutputFormat *f);
-#include "rtp.h"
+enum CodecID av_guess_image2_codec(const char *filename);
-#include "rtsp.h"
+/* XXX: Use automatic init with either ELF sections or C file parser */
+/* modules. */
/* utils.c */
void av_register_input_format(AVInputFormat *format);
void av_register_output_format(AVOutputFormat *format);
AVOutputFormat *guess_stream_format(const char *short_name,
- const char *filename, const char *mime_type);
+ const char *filename,
+ const char *mime_type);
AVOutputFormat *guess_format(const char *short_name,
- const char *filename, const char *mime_type);
+ const char *filename,
+ const char *mime_type);
+
+/**
+ * Guesses 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 CodecType type);
+ const char *filename, const char *mime_type,
+ enum CodecType type);
+/**
+ * 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
+ * @param size buffer size
+ *
+ * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
+ */
void av_hex_dump(FILE *f, uint8_t *buf, int size);
+
+/**
+ * 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.
+ * @param level The importance level of the message, lower values signifying
+ * higher importance.
+ * @param buf buffer
+ * @param size buffer size
+ *
+ * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
+ */
+void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
+
+/**
+ * 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
+ * @param dump_payload True if the payload must be displayed, too.
+ */
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
+/**
+ * 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.
+ * @param level The importance level of the message, lower values signifying
+ * higher importance.
+ * @param pkt packet to dump
+ * @param dump_payload True if the payload must be displayed, too.
+ */
+void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
+
+/**
+ * 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.
+ *
+ * @see av_register_input_format()
+ * @see av_register_output_format()
+ * @see av_register_protocol()
+ */
void av_register_all(void);
-/* codec tag <-> codec id */
-enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
-unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
+/** codec tag <-> codec id */
+enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int 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.
+ */
AVInputFormat *av_find_input_format(const char *short_name);
+
+/**
+ * Guess file format.
+ *
+ * @param is_opened Whether the file is already opened; determines whether
+ * demuxers with or without AVFMT_NOFILE are probed.
+ */
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
+
+/**
+ * Allocates 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,
ByteIOContext *pb, const char *filename,
AVInputFormat *fmt, AVFormatParameters *ap);
+
+/**
+ * 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.
+ * @param filename filename to open
+ * @param fmt If non-NULL, force the file format to use.
+ * @param buf_size optional buffer size (zero if default is OK)
+ * @param ap Additional parameters needed when opening the file
+ * (NULL if default).
+ * @return 0 if OK, AVERROR_xxx otherwise
+ */
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
AVInputFormat *fmt,
int buf_size,
AVFormatParameters *ap);
-/* no av_open for output, so applications will need this: */
-AVFormatContext *av_alloc_format_context(void);
-#define AVERROR_UNKNOWN (-1) /* unknown error */
-#define AVERROR_IO (-2) /* i/o error */
-#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
-#define AVERROR_INVALIDDATA (-4) /* invalid data found */
-#define AVERROR_NOMEM (-5) /* not enough memory */
-#define AVERROR_NOFMT (-6) /* unknown format */
-#define AVERROR_NOTSUPP (-7) /* operation not supported */
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+/**
+ * @deprecated Use avformat_alloc_context() instead.
+ */
+attribute_deprecated AVFormatContext *av_alloc_format_context(void);
+#endif
+/**
+ * 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);
+
+/**
+ * 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
+ * @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.
+ */
int av_find_stream_info(AVFormatContext *ic);
+
+/**
+ * Read a transport packet from a media file.
+ *
+ * This function is obsolete and should never be used.
+ * Use av_read_frame() instead.
+ *
+ * @param s media file handle
+ * @param pkt is filled
+ * @return 0 if OK, AVERROR_xxx on error
+ */
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
+
+/**
+ * Return the next frame of a stream.
+ *
+ * The returned packet is valid
+ * until the next av_read_frame() or until av_close_input_file() and
+ * must be freed with av_free_packet. For video, the packet contains
+ * exactly one frame. For audio, it contains an integer number of
+ * frames if each frame has a known fixed size (e.g. PCM or ADPCM
+ * data). If the audio frames have a variable size (e.g. MPEG audio),
+ * then it contains one frame.
+ *
+ * pkt->pts, pkt->dts and pkt->duration are always set to correct
+ * values in AVStream.time_base units (and guessed if the format cannot
+ * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
+ * has B-frames, so it is better to rely on pkt->dts if you do not
+ * decompress the payload.
+ *
+ * @return 0 if OK, < 0 on error or end of file
+ */
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
-int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
+
+/**
+ * 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
+ * from AV_TIME_BASE units to the stream specific time_base.
+ * @param timestamp Timestamp in AVStream.time_base units
+ * or, if no stream is specified, in AV_TIME_BASE units.
+ * @param flags flags which select direction and seeking mode
+ * @return >= 0 on success
+ */
+int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
+ int flags);
+
+/**
+ * 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.
+ *
+ * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
+ * are the file position (this may not be supported by all demuxers).
+ * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
+ * in the stream with stream_index (this may not be supported by all demuxers).
+ * Otherwise all timestamps are in units of the stream selected by stream_index
+ * or if stream_index is -1, in AV_TIME_BASE units.
+ * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
+ * keyframes (this may not be supported by all demuxers).
+ *
+ * @param stream_index index of the stream which is used as time base reference
+ * @param min_ts smallest acceptable timestamp
+ * @param ts target timestamp
+ * @param max_ts largest acceptable timestamp
+ * @param flags flags
+ * @returns >=0 on success, error code otherwise
+ *
+ * @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);
+
+/**
+ * Start playing a network-based stream (e.g. RTSP stream) at the
+ * current position.
+ */
int av_read_play(AVFormatContext *s);
+
+/**
+ * Pause a network-based stream (e.g. RTSP stream).
+ *
+ * Use av_read_play() to resume it.
+ */
int av_read_pause(AVFormatContext *s);
+
+/**
+ * Free a AVFormatContext allocated by av_open_input_stream.
+ * @param s context to free
+ */
+void av_close_input_stream(AVFormatContext *s);
+
+/**
+ * Close a media file (but not its codecs).
+ *
+ * @param s media file handle
+ */
void av_close_input_file(AVFormatContext *s);
+
+/**
+ * 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
+ * can be added in read_packet too.
+ *
+ * @param s media file handle
+ * @param id file-format-dependent stream ID
+ */
AVStream *av_new_stream(AVFormatContext *s, int id);
+AVProgram *av_new_program(AVFormatContext *s, int id);
+
+/**
+ * Add a new chapter.
+ * This function is NOT part of the public API
+ * and should ONLY be used by demuxers.
+ *
+ * @param s media file handle
+ * @param id unique ID for this chapter
+ * @param start chapter start time in time_base units
+ * @param end chapter end time in time_base units
+ * @param title chapter title
+ *
+ * @return AVChapter or NULL on error
+ */
+AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
+ int64_t start, int64_t end, const char *title);
+
+/**
+ * Set the pts for a given stream.
+ *
+ * @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)
+ */
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
int pts_num, int pts_den);
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
-#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
+#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes
int av_find_default_stream_index(AVFormatContext *s);
+
+/**
+ * Gets 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 >=
+ * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
+ * @return < 0 if no such timestamp could be found
+ */
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
-int av_add_index_entry(AVStream *st,
- int64_t pos, int64_t timestamp, int size, int distance, int flags);
-int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
+
+/**
+ * Ensures 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
+ * by demuxers.
+ */
+void ff_reduce_index(AVFormatContext *s, int stream_index);
+
+/**
+ * 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
+ */
+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().
+ * 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
+ * @param stream_index stream number
+ */
+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.
+ *
+ * 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).
+ * @param timestamp new dts expressed in time_base of param ref_st
+ * @param ref_st reference stream giving time_base of param timestamp
+ */
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
-int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
-/* media file output */
+/**
+ * Does 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
+ * @param stream_index stream number
+ */
+int64_t av_gen_search(AVFormatContext *s, int stream_index,
+ int64_t target_ts, int64_t pos_min,
+ int64_t pos_max, int64_t pos_limit,
+ int64_t ts_min, int64_t ts_max,
+ int flags, int64_t *ts_ret,
+ int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
+
+/** media file output */
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
+
+/**
+ * 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
+ */
int av_write_header(AVFormatContext *s);
+
+/**
+ * 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
+ * specification, if not then av_interleaved_write_frame must be used.
+ *
+ * @param s media file handle
+ * @param pkt The packet, which contains the stream_index, buf/buf_size,
+ dts/pts, ...
+ * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
+ */
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
+
+/**
+ * Writes 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
+ * call av_write_frame() instead as it is slightly faster. It is also important
+ * to keep in mind that completely non-interleaved input will need huge amounts
+ * of memory to interleave with this, so it is preferable to interleave at the
+ * demuxer level.
+ *
+ * @param s media file handle
+ * @param pkt The packet, which contains the stream_index, buf/buf_size,
+ dts/pts, ...
+ * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
+ */
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
+/**
+ * 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()
+ * on them is still safe.
+ *
+ * @param s media file handle
+ * @param out the interleaved packet will be output here
+ * @param in 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,
+ * < 0 if an error occurred
+ */
+int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
+ AVPacket *pkt, int flush);
+
+/**
+ * @brief 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.
+ *
+ * @param s media file handle
+ * @return 0 if OK, AVERROR_xxx on error
+ */
int av_write_trailer(AVFormatContext *s);
void dump_format(AVFormatContext *ic,
int index,
const char *url,
int is_output);
-int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
-int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
+
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+/**
+ * Parses 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.
+ * @deprecated Use av_parse_video_frame_rate instead.
+ */
+attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
+ const char *arg);
+#endif
+
+/**
+ * Parses \p datestr and returns 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]}
+ * @endcode
+ * 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
+ * the time of the parsed date or INT64_MIN if \p datestr cannot be
+ * successfully parsed.
+ * - If a duration the syntax is:
+ * @code
+ * [-]HH[:MM[:SS[.m...]]]
+ * [-]S+[.m...]
+ * @endcode
+ * Returns the number of microseconds contained in a time interval
+ * with the specified duration or INT64_MIN if \p datestr cannot be
+ * successfully parsed.
+ * @param duration Flag which tells how to interpret \p datestr, if
+ * not zero \p datestr is interpreted as a duration, otherwise as a
+ * date.
+ */
int64_t parse_date(const char *datestr, int duration);
+/** Gets the current time in microseconds. */
int64_t av_gettime(void);
-/* ffm specific for ffserver */
+/* ffm-specific for ffserver */
#define FFM_PACKET_SIZE 4096
-offset_t ffm_read_write_index(int fd);
-void ffm_write_write_index(int fd, offset_t pos);
-void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
+int64_t ffm_read_write_index(int fd);
+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.
+ *
+ * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
+ * Return 1 if found.
+ */
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.
+ *
+ * Also handles the '%0nd' format where 'n' is the total number
+ * of digits and '%%'.
+ *
+ * @param buf destination buffer
+ * @param buf_size destination buffer size
+ * @param path numbered sequence string
+ * @param number frame number
+ * @return 0 if OK, -1 on format error
+ */
int av_get_frame_filename(char *buf, int buf_size,
const char *path, int number);
-int av_filename_number_test(const char *filename);
-/* grab specific */
-int video_grab_init(void);
-int audio_init(void);
+/**
+ * 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
+ */
+int av_filename_number_test(const char *filename);
-/* DV1394 */
-int dv1394_init(void);
-int dc1394_init(void);
+/**
+ * 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
+ * multiple AVStreams (one AVStream per RTP stream). Otherwise,
+ * all the contexts in the array (an AVCodecContext per RTP stream)
+ * must contain only one AVStream.
+ * @param n_files number of AVCodecContexts contained in ac
+ * @param buff buffer where the SDP will be stored (must be allocated by
+ * the caller)
+ * @param size the size of the buffer
+ * @return 0 if OK, AVERROR_xxx on error
+ */
+int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
#ifdef HAVE_AV_CONFIG_H
-#include "os_support.h"
-
-int strstart(const char *str, const char *val, const char **ptr);
-int stristart(const char *str, const char *val, const char **ptr);
-void pstrcpy(char *buf, int buf_size, const char *str);
-char *pstrcat(char *buf, int buf_size, const char *s);
-
-void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
+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);\
+ __typeof__(tab) _tab = (tab);\
+ __typeof__(elem) _elem = (elem);\
(void)sizeof(**_tab == _elem); /* check that types are compatible */\
- __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
+ ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
} while(0)
#else
#define dynarray_add(tab, nb_ptr, elem)\
do {\
- __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
+ ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
} while(0)
#endif
#endif /* HAVE_AV_CONFIG_H */
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* AVFORMAT_H */
-
+#endif /* AVFORMAT_AVFORMAT_H */