#ifndef AVFORMAT_AVFORMAT_H
#define AVFORMAT_AVFORMAT_H
+/**
+ * @defgroup libavf I/O and Muxing/Demuxing Library
+ * @{
+ *
+ * @defgroup lavf_decoding Demuxing
+ * @{
+ * @}
+ *
+ * @defgroup lavf_encoding Muxing
+ * @{
+ * @}
+ *
+ * @defgroup lavf_proto I/O Read/Write
+ * @{
+ * @}
+ *
+ * @defgroup lavf_codec Demuxers
+ * @{
+ * @defgroup lavf_codec_native Native Demuxers
+ * @{
+ * @}
+ * @defgroup lavf_codec_wrappers External library wrappers
+ * @{
+ * @}
+ * @}
+ * @defgroup lavf_protos I/O Protocols
+ * @{
+ * @}
+ * @defgroup lavf_internal Internal
+ * @{
+ * @}
+ * @}
+ *
+ */
/**
* Return the LIBAVFORMAT_VERSION_INT constant.
#define AVFMT_NOSTREAMS 0x1000 /**< Format does not require any streams */
#define AVFMT_NOBINSEARCH 0x2000 /**< Format does not allow to fallback to binary search via read_timestamp */
#define AVFMT_NOGENSEARCH 0x4000 /**< Format does not allow to fallback to generic search */
-#define AVFMT_TS_NONSTRICT 0x8000 /**< Format does not require strictly
- increasing timestamps, but they must
- still be monotonic */
+#define AVFMT_NO_BYTE_SEEK 0x8000 /**< Format does not allow seeking by bytes */
+#define AVFMT_TS_NONSTRICT 0x8000000 /**< Format does not require strictly
+ increasing timestamps, but they must
+ still be monotonic */
typedef struct AVOutputFormat {
const char *name;
int64_t *pos, int64_t pos_limit);
/**
- * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER.
+ * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS,
+ * AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH,
+ * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK.
*/
int flags;
typedef struct AVIndexEntry {
int64_t pos;
- int64_t timestamp;
+ int64_t timestamp; /**<
+ * Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are available
+ * when seeking to this entry. That means preferable PTS on keyframe based formats.
+ * But demuxers can choose to store a different timestamp, if it is more convenient for the implementation or nothing better
+ * is known
+ */
#define AVINDEX_KEYFRAME 0x0001
int flags:2;
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).
AVRational r_frame_rate;
void *priv_data;
+#if FF_API_REORDER_PRIVATE
/* internal data used in av_find_stream_info() */
int64_t first_dts;
+#endif
/**
* encoding: pts generation when outputting stream
* encoding: set by libavformat in av_write_header
*/
AVRational time_base;
+#if FF_API_REORDER_PRIVATE
int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
+#endif
+#if FF_API_STREAM_COPY
/* ffmpeg.c private use */
- int stream_copy; /**< If set, just copy stream. */
+ attribute_deprecated int stream_copy; /**< If set, just copy stream. */
+#endif
enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
#if FF_API_AVSTREAM_QUALITY
*/
int64_t duration;
+#if FF_API_REORDER_PRIVATE
/* av_read_frame() support */
enum AVStreamParseType need_parsing;
struct AVCodecParserContext *parser;
support seeking natively. */
int nb_index_entries;
unsigned int index_entries_allocated_size;
+#endif
int64_t nb_frames; ///< number of frames in this stream if known or 0
int disposition; /**< AV_DISPOSITION_* bit field */
+#if FF_API_REORDER_PRIVATE
AVProbeData probe_data;
#define MAX_REORDER_DELAY 16
int64_t pts_buffer[MAX_REORDER_DELAY+1];
+#endif
/**
* sample aspect ratio (0 if unknown)
AVDictionary *metadata;
+#if FF_API_REORDER_PRIVATE
/* 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;
* used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav*
*/
struct AVPacketList *last_in_packet_buffer;
+#endif
/**
* Average framerate
*/
AVRational avg_frame_rate;
+ /*****************************************************************
+ * All fields below this line are not part of the public API. They
+ * may not be used outside of libavformat and can be changed and
+ * removed at will.
+ * New public fields should be added right above.
+ *****************************************************************
+ */
+
/**
* Number of frames that have been demuxed during av_find_stream_info()
*/
int duration_count;
double duration_error[2][2][MAX_STD_TIMEBASES];
int64_t codec_info_duration;
+ int nb_decoded_frames;
} *info;
/**
* NOT PART OF PUBLIC API
*/
int request_probe;
+#if !FF_API_REORDER_PRIVATE
+ 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;
+ int64_t first_dts;
+ int64_t cur_dts;
+ int last_IP_duration;
+ int64_t last_IP_pts;
+
+ /**
+ * Number of packets to buffer for codec probing
+ */
+#define MAX_PROBE_PACKETS 2500
+ int probe_packets;
+
+ /**
+ * last packet in packet_buffer for this stream when muxing.
+ */
+ struct AVPacketList *last_in_packet_buffer;
+ AVProbeData probe_data;
+#define MAX_REORDER_DELAY 16
+ int64_t pts_buffer[MAX_REORDER_DELAY+1];
+ /* av_read_frame() support */
+ enum AVStreamParseType need_parsing;
+ struct AVCodecParserContext *parser;
+
+ AVIndexEntry *index_entries; /**< Only used if the format does not
+ support seeking natively. */
+ int nb_index_entries;
+ unsigned int index_entries_allocated_size;
+
+ int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
+#endif
} AVStream;
#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(AVFormatContext) must not be used outside libav*.
+ * sizeof(AVFormatContext) must not be used outside libav*, use
+ * avformat_alloc_context() to create an AVFormatContext.
*/
typedef struct AVFormatContext {
- const AVClass *av_class; /**< Set by avformat_alloc_context. */
- /* Can only be iformat or oformat, not both at the same time. */
+ /**
+ * A class for logging and AVOptions. Set by avformat_alloc_context().
+ * Exports (de)muxer private options if they exist.
+ */
+ const AVClass *av_class;
+
+ /**
+ * Can only be iformat or oformat, not both at the same time.
+ *
+ * decoding: set by avformat_open_input().
+ * encoding: set by the user.
+ */
struct AVInputFormat *iformat;
struct AVOutputFormat *oformat;
+
+ /**
+ * Format private data. This is an AVOptions-enabled struct
+ * if and only if iformat/oformat.priv_class is not NULL.
+ */
void *priv_data;
+
+ /*
+ * I/O context.
+ *
+ * decoding: either set by the user before avformat_open_input() (then
+ * the user must close it manually) or set by avformat_open_input().
+ * encoding: set by the user.
+ *
+ * Do NOT set this field if AVFMT_NOFILE flag is set in
+ * iformat/oformat.flags. In such a case, the (de)muxer will handle
+ * I/O in some other way and this field will be NULL.
+ */
AVIOContext *pb;
+
+ /**
+ * A list of all streams in the file. New streams are created with
+ * avformat_new_stream().
+ *
+ * decoding: streams are created by libavformat in avformat_open_input().
+ * If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also
+ * appear in av_read_frame().
+ * encoding: streams are created by the user before avformat_write_header().
+ */
unsigned int nb_streams;
AVStream **streams;
+
char filename[1024]; /**< input or output filename */
/* stream info */
#if FF_API_TIMESTAMP
#endif
int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
+#if FF_API_REORDER_PRIVATE
/* private data for pts handling (do not modify directly). */
/**
* This buffer is only needed when packets were already buffered but
* streams.
*/
struct AVPacketList *packet_buffer;
+#endif
/**
* Decoding: position of the first frame of the component, in
*/
int64_t duration;
+#if FF_API_FILESIZE
/**
* decoding: total file size, 0 if unknown
*/
- int64_t file_size;
+ attribute_deprecated int64_t file_size;
+#endif
/**
* Decoding: total stream bitrate in bit/s, 0 if not
*/
int bit_rate;
+#if FF_API_REORDER_PRIVATE
/* av_read_frame() support */
AVStream *cur_st;
/* av_seek_frame() support */
int64_t data_offset; /**< offset of the first packet */
+#endif
- int mux_rate;
+#if FF_API_MUXRATE
+ /**
+ * use mpeg muxer private options instead
+ */
+ attribute_deprecated int mux_rate;
+#endif
unsigned int packet_size;
- int preload;
+#if FF_API_PRELOAD
+ attribute_deprecated int preload;
+#endif
int max_delay;
#if FF_API_LOOP_OUTPUT
unsigned int probesize;
/**
- * Maximum time (in AV_TIME_BASE units) during which the input should
- * be analyzed in av_find_stream_info().
+ * decoding: maximum time (in AV_TIME_BASE units) during which the input should
+ * be analyzed in avformat_find_stream_info().
*/
int max_analyze_duration;
int debug;
#define FF_FDEBUG_TS 0x0001
+#if FF_API_REORDER_PRIVATE
/**
* Raw packets from the demuxer, prior to parsing and decoding.
* This buffer is used for buffering packets until the codec can
struct AVPacketList *raw_packet_buffer_end;
struct AVPacketList *packet_buffer_end;
+#endif
AVDictionary *metadata;
+#if FF_API_REORDER_PRIVATE
/**
* Remaining size available for raw_packet_buffer, in bytes.
* NOT PART OF PUBLIC API
*/
#define RAW_PACKET_BUFFER_SIZE 2500000
int raw_packet_buffer_remaining_size;
+#endif
/**
* Start time of the stream in real world time, in microseconds
*/
int error_recognition;
+ /**
+ * Custom interrupt callbacks for the I/O layer.
+ *
+ * decoding: set by the user before avformat_open_input().
+ * encoding: set by the user before avformat_write_header()
+ * (mainly useful for AVFMT_NOFILE formats). The callback
+ * should also be passed to avio_open2() if it's used to
+ * open the file.
+ */
+ AVIOInterruptCB interrupt_callback;
+
/**
* Transport stream id.
* This will be moved into demuxer private options. Thus no API/ABI compatibility
*/
int ts_id;
+
+
+ /*****************************************************************
+ * All fields below this line are not part of the public API. They
+ * may not be used outside of libavformat and can be changed and
+ * removed at will.
+ * New public fields should be added right above.
+ *****************************************************************
+ */
+#if !FF_API_REORDER_PRIVATE
+ /**
+ * 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;
+ /**
+ * Remaining size available for raw_packet_buffer, in bytes.
+ */
+#define RAW_PACKET_BUFFER_SIZE 2500000
+ int raw_packet_buffer_remaining_size;
+
+ /**
+ * 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;
+ struct AVPacketList *packet_buffer_end;
+
+ /* av_read_frame() support */
+ AVStream *cur_st;
+
+ /* av_seek_frame() support */
+ int64_t data_offset; /**< offset of the first packet */
+#endif
} AVFormatContext;
typedef struct AVPacketList {
*/
void avformat_free_context(AVFormatContext *s);
+#if FF_API_NEW_STREAM
/**
* Add a new stream to a media file.
*
* @param s media file handle
* @param id file-format-dependent stream ID
*/
+attribute_deprecated
AVStream *av_new_stream(AVFormatContext *s, int id);
+#endif
+
+/**
+ * Add a new stream to a media file.
+ *
+ * When demuxing, it is called by the demuxer in read_header(). If the
+ * flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also
+ * be called in read_packet().
+ *
+ * When muxing, should be called by the user before avformat_write_header().
+ *
+ * @param c If non-NULL, the AVCodecContext corresponding to the new stream
+ * will be initialized to use this codec. This is needed for e.g. codec-specific
+ * defaults to be set, so codec should be provided if it is known.
+ *
+ * @return newly created stream or NULL on error.
+ */
+AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c);
+
AVProgram *av_new_program(AVFormatContext *s, int id);
/**
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
int size, int distance, int flags);
-/**
- * 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
- * @param stream_index stream number
- */
+#if FF_API_SEEK_PUBLIC
+attribute_deprecated
int av_seek_frame_binary(AVFormatContext *s, int stream_index,
int64_t target_ts, int flags);
-
-/**
- * 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).
- * @param timestamp new dts expressed in time_base of param ref_st
- * @param ref_st reference stream giving time_base of param timestamp
- */
+attribute_deprecated
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t 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
- * @param stream_index stream number
- */
+attribute_deprecated
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 ));
+#endif
/**
* media file output
*/
const AVClass *avformat_get_class(void);
+/**
+ * Do global initialization of network components. This is optional,
+ * but recommended, since it avoids the overhead of implicitly
+ * doing the setup for each session.
+ *
+ * Calling this function will become mandatory if using network
+ * protocols at some major version bump.
+ */
+int avformat_network_init(void);
+
+/**
+ * Undo the initialization done by avformat_network_init.
+ */
+int avformat_network_deinit(void);
+
#endif /* AVFORMAT_AVFORMAT_H */
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