* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#ifndef AVFORMAT_H
-#define AVFORMAT_H
+#ifndef FFMPEG_AVFORMAT_H
+#define FFMPEG_AVFORMAT_H
-#define LIBAVFORMAT_VERSION_INT ((51<<16)+(12<<8)+1)
-#define LIBAVFORMAT_VERSION 51.12.1
+#define LIBAVFORMAT_VERSION_TRIPLET 52,7,0
+
+#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_TRIPLET)
+#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_TRIPLET)
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
void av_init_packet(AVPacket *pkt);
/**
- * Allocate the payload of a packet and intialize its fields to default values.
+ * Allocate the payload of a packet and initialize its fields to default values.
*
* @param pkt packet
* @param size wanted payload size
int av_new_packet(AVPacket *pkt, int size);
/**
- * Allocate and read the payload of a packet and intialize its fields to default values.
+ * Allocate and read the payload of a packet and initialize its fields to default values.
*
* @param pkt packet
* @param size wanted payload size
int height;
enum PixelFormat pix_fmt;
int channel; /**< used to select dv channel */
-#if LIBAVFORMAT_VERSION_INT < (52<<16)
- const char *device; /**< video, audio or DV device */
-#endif
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
int initial_pause:1; /**< do not begin to play the stream
immediately (RTSP only) */
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
#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_NOTIMESTAMPS 0x0080 /**< format does not need / have any timestamps */
#define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
typedef struct AVOutputFormat {
*/
const struct AVCodecTag **codec_tag;
+ enum CodecID subtitle_codec; /**< default subtitle codec */
+
/* private fields */
struct AVOutputFormat *next;
} AVOutputFormat;
const char *long_name;
/** 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 by this format */
+ /**
+ * Tell if a given file has a chance of being parsed by 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
* @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);
/**
- * 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 occured
*/
int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
int64_t *pos, int64_t pos_limit);
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 size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 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 */
} AVIndexEntry;
+/**
+ * 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 */
/**
- * real base frame rate of the stream.
- * this is the lowest framerate with which all timestamps can be
+ * Real base frame rate of the stream.
+ * This is the lowest frame rate 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 timebase is 1/90000 and all frames have either
- * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
+ * frame rates 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.
*/
AVRational r_frame_rate;
void *priv_data;
-#if LIBAVFORMAT_VERSION_INT < (52<<16)
+
/* internal data used in av_find_stream_info() */
- int64_t codec_info_duration;
- int codec_info_nb_frames;
-#endif
+ int64_t first_dts;
/** encoding: PTS generation when outputing stream */
- AVFrac pts;
+ 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
+ * 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/frame rate and timestamp increments should be
* identically 1.
*/
AVRational time_base;
int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
/* ffmpeg.c private use */
int stream_copy; /**< if set, just copy stream */
- enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
+ 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 */
+ * 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. */
+ /**
+ * 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 stream time base. */
+ /**
+ * 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 estimates from bit rate and file size.
+ */
int64_t duration;
char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
struct AVCodecParserContext *parser;
int64_t cur_dts;
- int last_IP_duration;
- int64_t last_IP_pts;
+ int last_IP_duration[2];
+ int64_t last_IP_pts[2];
/* av_seek_frame() support */
AVIndexEntry *index_entries; /**< only used if the format does not
support seeking natively */
#define MAX_REORDER_DELAY 4
int64_t pts_buffer[MAX_REORDER_DELAY+1];
+
+ char *filename; /**< source filename of the stream */
} 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(AVProgram) must not be used outside libav*.
+ */
+typedef struct AVProgram {
+ int id;
+ char *provider_name; ///< Network name for DVB streams
+ char *name; ///< Service name for DVB streams
+ 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;
+} AVProgram;
+
#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
(streams are added dynamically) */
#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 */
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 */
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_NONBLOCK 0x0004 ///< do not block when reading packets from input
int loop_input;
/** decoding: size of data to probe; encoding unused */
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 per stream for the index.
+ * If the needed 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;
} AVFormatContext;
typedef struct AVPacketList {
struct AVPacketList *next;
} AVPacketList;
+#if LIBAVFORMAT_VERSION_INT < (53<<16)
extern AVInputFormat *first_iformat;
extern AVOutputFormat *first_oformat;
+#endif
+
+AVInputFormat *av_iformat_next(AVInputFormat *f);
+AVOutputFormat *av_oformat_next(AVOutputFormat *f);
enum CodecID av_guess_image2_codec(const char *filename);
/* XXX: use automatic init with either ELF sections or C file parser */
/* modules */
-#include "rtp.h"
-
-#include "rtsp.h"
-
/* utils.c */
void av_register_input_format(AVInputFormat *format);
void av_register_output_format(AVOutputFormat *format);
AVInputFormat *fmt,
int buf_size,
AVFormatParameters *ap);
-/** no av_open for output, so applications will need this: */
+/**
+ * Allocate an AVFormatContext.
+ * Can be freed with av_free() but do not forget to free everything you
+ * explicitly allocated as well!
+ */
AVFormatContext *av_alloc_format_context(void);
/**
*
* @param ic media file handle
* @return >=0 if OK. AVERROR_xxx if error.
- * @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need
+ * @todo Let user decide somehow what information is needed so we do not waste time getting stuff the user does not need.
*/
int av_find_stream_info(AVFormatContext *ic);
*/
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 id file format dependent stream id
*/
AVStream *av_new_stream(AVFormatContext *s, int id);
+AVProgram *av_new_program(AVFormatContext *s, int id);
/**
* Set the pts for a given stream.
*/
int av_index_search_timestamp(AVStream *st, int64_t timestamp, 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 a index entry into a sorted list updateing if it is already there.
*
/**
* Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
- * this isnt supposed to be called directly by a user application, but by demuxers
+ * 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
*/
* Updates cur_dts of all streams based on given timestamp and AVStream.
*
* Stream ref_st unchanged, others set cur_dts in their native timebase
- * only needed for timestamp wrapping or if (dts not set and pts!=dts)
+ * 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
*/
/**
* Does a binary search using read_timestamp().
- * this isnt supposed to be called directly by a user application, but by demuxers
+ * 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_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
/**
- * allocate the stream private data and write the stream header to an
- * output media file
+ * 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 if error.
*
* 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 completly non interleaved input will need huge amounts
- * of memory to interleave with this, so its prefereable to interleave at the
- * demuxer level
+ * 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, ...
/**
* parses width and height out of string str.
+ * @deprecated Use av_parse_video_frame_size instead.
*/
-int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
+attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
/**
* Converts frame rate from string to a fraction.
+ * @deprecated Use av_parse_video_frame_rate instead.
*/
-int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
+attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
/**
- * Converts date string to number of seconds since Jan 1st, 1970.
- *
+ * 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
- * Syntax:
- * - If not a duration:
* [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
- * Time is localtime unless Z is suffixed to the end. In this case GMT
- * Return the date in micro seconds since 1970
- *
- * - If a duration:
- * HH[:MM[:SS[.m...]]]
- * S+[.m...]
* @endcode
+ * Time is localtime unless Z is appended, in which case it is
+ * interpreted as UTC.
+ * If the year-month-day part isn't 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);
* @param buf destination buffer
* @param buf_size destination buffer size
* @param path numbered sequence string
- * @number frame number
+ * @param number frame number
* @return 0 if OK, -1 if format error.
*/
int av_get_frame_filename(char *buf, int buf_size,
*/
int av_filename_number_test(const char *filename);
-/* grab specific */
-int video_grab_init(void);
-int audio_init(void);
-
-/* 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 if 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);
#ifdef __GNUC__
#endif /* HAVE_AV_CONFIG_H */
-#endif /* AVFORMAT_H */
-
+#endif /* FFMPEG_AVFORMAT_H */
projects / ffmpeg / blobdiff