spelling/wording/grammar
Originally committed as revision 15440 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Diego Biurrun
parent
fff5e687a1
commit
4f57fa8c03
@ -80,17 +80,17 @@ typedef struct AVPacket {
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int64_t pos; ///< byte position in stream, -1 if unknown
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/**
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* This is the time difference in stream timebase units from the pts of this
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* Time difference in stream time base units from the pts of this
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* packet to the point at which the output from the decoder has converged
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* independent from the availability
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* of previous frames (that is the frames are virtually identical no matter
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* if decoding started from the very first frame or from this keyframe).
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* is AV_NOPTS_VALUE if unknown.
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* independent from the availability of previous frames. That is, the
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* frames are virtually identical no matter if decoding started from
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* the very first frame or from this keyframe.
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* Is AV_NOPTS_VALUE if unknown.
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* This field is not the display duration of the current packet.
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*
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* The purpose of this field is to allow seeking in streams that have no
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* keyframes in the conventional sense. It corresponds to the
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* recovery point SEI in H.264 and match_time_delta in nut. It also is
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* recovery point SEI in H.264 and match_time_delta in NUT. It is also
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* essential for some types of subtitle streams to ensure that all
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* subtitles are correctly displayed after seeking.
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*/
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@ -106,38 +106,40 @@ void av_destruct_packet_nofree(AVPacket *pkt);
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void av_destruct_packet(AVPacket *pkt);
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/**
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* Initialize optional fields of a packet to default values.
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* Initialize optional fields of a packet with default values.
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*
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* @param pkt packet
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*/
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void av_init_packet(AVPacket *pkt);
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/**
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* Allocate the payload of a packet and initialize its fields to default values.
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* Allocate the payload of a packet and initialize its fields with
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* default values.
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*
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* @param pkt packet
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* @param size wanted payload size
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* @return 0 if OK. AVERROR_xxx otherwise.
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* @return 0 if OK, AVERROR_xxx otherwise
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*/
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int av_new_packet(AVPacket *pkt, int size);
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/**
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* Allocate and read the payload of a packet and initialize its fields to default values.
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* Allocate and read the payload of a packet and initialize its fields with
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* default values.
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*
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* @param pkt packet
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* @param size wanted payload size
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* @return >0 (read size) if OK. AVERROR_xxx otherwise.
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* @param size desired payload size
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* @return >0 (read size) if OK, AVERROR_xxx otherwise
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*/
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int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
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/**
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* @warning This is a hack - the packet memory allocation stuff is broken. The
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* packet is allocated if it was not really allocated
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* packet is allocated if it was not really allocated.
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*/
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int av_dup_packet(AVPacket *pkt);
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/**
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* Free a packet
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* Free a packet.
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*
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* @param pkt packet to free
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*/
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@ -152,9 +154,9 @@ static inline void av_free_packet(AVPacket *pkt)
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/* fractional numbers for exact pts handling */
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/**
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* the exact value of the fractional number is: 'val + num / den'.
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* num is assumed to be such as 0 <= num < den
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* @deprecated Use AVRational instead
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* The exact value of the fractional number is: 'val + num / den'.
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* num is assumed to be 0 <= num < den.
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* @deprecated Use AVRational instead.
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*/
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typedef struct AVFrac {
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int64_t val, num, den;
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@ -167,14 +169,14 @@ struct AVCodecTag;
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struct AVFormatContext;
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/** this structure contains the data a format has to probe a file */
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/** This structure contains the data a format has to probe a file. */
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typedef struct AVProbeData {
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const char *filename;
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unsigned char *buf;
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int buf_size;
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} AVProbeData;
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#define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
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#define AVPROBE_SCORE_MAX 100 ///< Maximum score, half of that is used for file-extension-based detection.
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#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
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typedef struct AVFormatParameters {
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@ -184,14 +186,14 @@ typedef struct AVFormatParameters {
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int width;
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int height;
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enum PixelFormat pix_fmt;
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int channel; /**< used to select dv channel */
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const char *standard; /**< tv standard, NTSC, PAL, SECAM */
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unsigned int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */
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unsigned int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport
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int channel; /**< Used to select DV channel. */
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const char *standard; /**< TV standard, NTSC, PAL, SECAM */
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unsigned int mpeg2ts_raw:1; /**< Force raw MPEG-2 transport stream output, if possible. */
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unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport
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stream packet (only meaningful if
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mpeg2ts_raw is TRUE) */
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unsigned int initial_pause:1; /**< do not begin to play the stream
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immediately (RTSP only) */
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mpeg2ts_raw is TRUE). */
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unsigned int initial_pause:1; /**< Do not begin to play the stream
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immediately (RTSP only). */
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unsigned int prealloced_context:1;
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
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enum CodecID video_codec_id;
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@ -199,16 +201,16 @@ typedef struct AVFormatParameters {
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#endif
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} AVFormatParameters;
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//! demuxer will use url_fopen, no opened file should be provided by the caller
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//! Demuxer will use url_fopen, no opened file should be provided by the caller.
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#define AVFMT_NOFILE 0x0001
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#define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
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#define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
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#define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
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raw picture data */
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#define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
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#define AVFMT_NOTIMESTAMPS 0x0080 /**< format does not need / have any timestamps */
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#define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
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#define AVFMT_TS_DISCONT 0x0200 /**< format allows timestamo discontinuities */
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#define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */
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#define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */
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#define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for
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raw picture data. */
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#define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */
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#define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */
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#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
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#define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. */
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typedef struct AVOutputFormat {
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const char *name;
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@ -219,8 +221,8 @@ typedef struct AVOutputFormat {
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*/
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const char *long_name;
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const char *mime_type;
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const char *extensions; /**< comma separated filename extensions */
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/** size of private data so that it can be allocated in the wrapper */
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const char *extensions; /**< comma-separated filename extensions */
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/** Size of private data so that it can be allocated in the wrapper. */
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int priv_data_size;
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/* output support */
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enum CodecID audio_codec; /**< default audio codec */
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@ -230,7 +232,7 @@ typedef struct AVOutputFormat {
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int (*write_trailer)(struct AVFormatContext *);
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/** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
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int flags;
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/** currently only used to set pixel format if not YUV420P */
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/** Currently only used to set pixel format if not YUV420P. */
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int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
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@ -254,7 +256,7 @@ typedef struct AVInputFormat {
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* to define it.
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*/
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const char *long_name;
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/** size of private data so that it can be allocated in the wrapper */
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/** Size of private data so that it can be allocated in the wrapper. */
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int priv_data_size;
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/**
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* Tell if a given file has a chance of being parsed by this format.
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@ -262,22 +264,22 @@ typedef struct AVInputFormat {
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* big so you do not have to check for that unless you need more.
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*/
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int (*read_probe)(AVProbeData *);
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/** read the format header and initialize the AVFormatContext
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structure. Return 0 if OK. 'ap' if non NULL contains
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additional paramters. Only used in raw format right
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/** Read the format header and initialize the AVFormatContext
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structure. Return 0 if OK. 'ap' if non-NULL contains
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additional parameters. Only used in raw format right
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now. 'av_new_stream' should be called to create new streams. */
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int (*read_header)(struct AVFormatContext *,
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AVFormatParameters *ap);
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/** read one packet and put it in 'pkt'. pts and flags are also
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/** Read one packet and put it in 'pkt'. pts and flags are also
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set. 'av_new_stream' can be called only if the flag
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AVFMTCTX_NOHEADER is used. */
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int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
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/** close the stream. The AVFormatContext and AVStreams are not
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/** Close the stream. The AVFormatContext and AVStreams are not
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freed by this function */
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int (*read_close)(struct AVFormatContext *);
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/**
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* seek to a given timestamp relative to the frames in
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* stream component stream_index
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* Seek to a given timestamp relative to the frames in
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* stream component stream_index.
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* @param stream_index must not be -1
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* @param flags selects which direction should be preferred if no exact
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* match is available
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@ -286,26 +288,26 @@ typedef struct AVInputFormat {
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int (*read_seek)(struct AVFormatContext *,
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int stream_index, int64_t timestamp, int flags);
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/**
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* gets the next timestamp in stream[stream_index].time_base units.
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* Gets the next timestamp in stream[stream_index].time_base units.
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* @return the timestamp or AV_NOPTS_VALUE if an error occurred
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*/
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int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
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int64_t *pos, int64_t pos_limit);
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/** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
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/** Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. */
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int flags;
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/** if extensions are defined, then no probe is done. You should
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/** If extensions are defined, then no probe is done. You should
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usually not use extension format guessing because it is not
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reliable enough */
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const char *extensions;
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/** general purpose read only value that the format can use */
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/** General purpose read-only value that the format can use. */
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int value;
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/** start/resume playing - only meaningful if using a network based format
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(RTSP) */
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/** Start/resume playing - only meaningful if using a network-based format
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(RTSP). */
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int (*read_play)(struct AVFormatContext *);
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/** pause playing - only meaningful if using a network based format
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(RTSP) */
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/** Pause playing - only meaningful if using a network-based format
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(RTSP). */
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int (*read_pause)(struct AVFormatContext *);
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const struct AVCodecTag * const *codec_tag;
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@ -317,7 +319,7 @@ typedef struct AVInputFormat {
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enum AVStreamParseType {
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AVSTREAM_PARSE_NONE,
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AVSTREAM_PARSE_FULL, /**< full parsing and repack */
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AVSTREAM_PARSE_HEADERS, /**< only parse headers, don't repack */
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AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */
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AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on packet boundary */
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};
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@ -326,8 +328,8 @@ typedef struct AVIndexEntry {
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int64_t timestamp;
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#define AVINDEX_KEYFRAME 0x0001
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int flags:2;
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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).
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int min_distance; /**< min distance between this and the previous keyframe, used to avoid unneeded searching */
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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).
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int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
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} AVIndexEntry;
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#define AV_DISPOSITION_DEFAULT 0x0001
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@ -346,37 +348,36 @@ typedef struct AVIndexEntry {
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*/
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typedef struct AVStream {
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int index; /**< stream index in AVFormatContext */
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int id; /**< format specific stream id */
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int id; /**< format-specific stream ID */
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AVCodecContext *codec; /**< codec context */
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/**
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* Real base frame rate of the stream.
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* This is the lowest frame rate with which all timestamps can be
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* represented accurately (it is the least common multiple of all
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* frame rates in the stream), Note, this value is just a guess!
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* frame rates in the stream). Note, this value is just a guess!
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* For example if the time base is 1/90000 and all frames have either
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* approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1.
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* approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
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*/
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AVRational r_frame_rate;
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void *priv_data;
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/* internal data used in av_find_stream_info() */
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int64_t first_dts;
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/** encoding: PTS generation when outputing stream */
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/** encoding: pts generation when outputting stream */
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struct AVFrac pts;
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/**
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* This is the fundamental unit of time (in seconds) in terms
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* of which frame timestamps are represented. For fixed-fps content,
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* timebase should be 1/frame rate and timestamp increments should be
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* identically 1.
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* time base should be 1/frame rate and timestamp increments should be 1.
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*/
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AVRational time_base;
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int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
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/* ffmpeg.c private use */
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int stream_copy; /**< if set, just copy stream */
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enum AVDiscard discard; ///< selects which packets can be discarded at will and do not need to be demuxed
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int stream_copy; /**< If set, just copy stream. */
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enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
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//FIXME move stuff to a flags field?
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/** quality, as it has been removed from AVCodecContext and put in AVVideoFrame
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/** Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
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* MN: dunno if that is the right place for it */
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float quality;
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/**
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@ -391,7 +392,7 @@ typedef struct AVStream {
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/**
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* Decoding: duration of the stream, in stream time base.
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* If a source file does not specify a duration, but does specify
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* a bitrate, this value will be estimates from bit rate and file size.
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* a bitrate, this value will be estimated from bitrate and file size.
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*/
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int64_t duration;
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@ -405,8 +406,8 @@ typedef struct AVStream {
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int last_IP_duration;
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int64_t last_IP_pts;
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/* av_seek_frame() support */
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AVIndexEntry *index_entries; /**< only used if the format does not
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support seeking natively */
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AVIndexEntry *index_entries; /**< Only used if the format does not
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support seeking natively. */
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int nb_index_entries;
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unsigned int index_entries_allocated_size;
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@ -442,8 +443,8 @@ typedef struct AVStream {
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*/
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typedef struct AVProgram {
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int id;
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char *provider_name; ///< Network name for DVB streams
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char *name; ///< Service name for DVB streams
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char *provider_name; ///< network name for DVB streams
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char *name; ///< service name for DVB streams
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int flags;
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enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
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unsigned int *stream_index;
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@ -454,8 +455,8 @@ typedef struct AVProgram {
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(streams are added dynamically) */
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typedef struct AVChapter {
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int id; ///< Unique id to identify the chapter
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AVRational time_base; ///< Timebase in which the start/end timestamps are specified
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int id; ///< unique ID to identify the chapter
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AVRational time_base; ///< time base in which the start/end timestamps are specified
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int64_t start, end; ///< chapter start/end time in time_base units
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char *title; ///< chapter title
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} AVChapter;
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@ -463,15 +464,15 @@ typedef struct AVChapter {
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#define MAX_STREAMS 20
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/**
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* format I/O context.
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* Format I/O context.
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* New fields can be added to the end with minor version bumps.
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* Removal, reordering and changes to existing fields require a major
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* version bump.
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* sizeof(AVFormatContext) must not be used outside libav*.
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*/
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typedef struct AVFormatContext {
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const AVClass *av_class; /**< set by av_alloc_format_context */
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/* can only be iformat or oformat, not both at the same time */
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const AVClass *av_class; /**< Set by av_alloc_format_context. */
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/* Can only be iformat or oformat, not both at the same time. */
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struct AVInputFormat *iformat;
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struct AVOutputFormat *oformat;
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void *priv_data;
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@ -490,24 +491,24 @@ typedef struct AVFormatContext {
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int track; /**< track number, 0 if none */
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char genre[32]; /**< ID3 genre */
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int ctx_flags; /**< format specific flags, see AVFMTCTX_xx */
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/* private data for pts handling (do not modify directly) */
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int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
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/* private data for pts handling (do not modify directly). */
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/** This buffer is only needed when packets were already buffered but
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not decoded, for example to get the codec parameters in mpeg
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streams */
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not decoded, for example to get the codec parameters in MPEG
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streams. */
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struct AVPacketList *packet_buffer;
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/** decoding: position of the first frame of the component, in
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/** Decoding: position of the first frame of the component, in
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AV_TIME_BASE fractional seconds. NEVER set this value directly:
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it is deduced from the AVStream values. */
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It is deduced from the AVStream values. */
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int64_t start_time;
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/** decoding: duration of the stream, in AV_TIME_BASE fractional
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/** Decoding: duration of the stream, in AV_TIME_BASE fractional
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seconds. NEVER set this value directly: it is deduced from the
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AVStream values. */
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int64_t duration;
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/** decoding: total file size. 0 if unknown */
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/** decoding: total file size, 0 if unknown */
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int64_t file_size;
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/** decoding: total stream bitrate in bit/s, 0 if not
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/** Decoding: total stream bitrate in bit/s, 0 if not
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available. Never set it directly if the file_size and the
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duration are known as ffmpeg can compute it automatically. */
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int bit_rate;
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@ -533,16 +534,17 @@ typedef struct AVFormatContext {
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int loop_output;
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int flags;
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#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
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||||
#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
|
||||
#define AVFMT_FLAG_NONBLOCK 0x0004 ///< do not block when reading packets from input
|
||||
#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 */
|
||||
/** 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;
|
||||
|
||||
@ -554,26 +556,26 @@ typedef struct AVFormatContext {
|
||||
|
||||
/**
|
||||
* Forced video codec_id.
|
||||
* demuxing: set by user
|
||||
* Demuxing: Set by user.
|
||||
*/
|
||||
enum CodecID video_codec_id;
|
||||
/**
|
||||
* Forced audio codec_id.
|
||||
* demuxing: set by user
|
||||
* Demuxing: Set by user.
|
||||
*/
|
||||
enum CodecID audio_codec_id;
|
||||
/**
|
||||
* Forced subtitle codec_id.
|
||||
* demuxing: set by user
|
||||
* 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
|
||||
* 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
|
||||
* Demuxers for which a full in-memory index is mandatory will ignore
|
||||
* this.
|
||||
* muxing : unused
|
||||
* demuxing: set by user
|
||||
@ -582,7 +584,7 @@ typedef struct AVFormatContext {
|
||||
|
||||
/**
|
||||
* Maximum amount of memory in bytes to use for buffering frames
|
||||
* obtained from real-time capture devices.
|
||||
* obtained from realtime capture devices.
|
||||
*/
|
||||
unsigned int max_picture_buffer;
|
||||
|
||||
@ -590,13 +592,13 @@ typedef struct AVFormatContext {
|
||||
AVChapter **chapters;
|
||||
|
||||
/**
|
||||
* Flags to enable debuging.
|
||||
* Flags to enable debugging.
|
||||
*/
|
||||
int debug;
|
||||
#define FF_FDEBUG_TS 0x0001
|
||||
|
||||
/**
|
||||
* raw packets from the demuxer, prior to parsing and decoding.
|
||||
* 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.
|
||||
@ -634,7 +636,7 @@ AVOutputFormat *guess_format(const char *short_name,
|
||||
const char *filename, const char *mime_type);
|
||||
|
||||
/**
|
||||
* Guesses the codec id based upon muxer and filename.
|
||||
* 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);
|
||||
@ -669,7 +671,7 @@ void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
|
||||
*
|
||||
* @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
|
||||
* @param dump_payload True if the payload must be displayed, too.
|
||||
*/
|
||||
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
|
||||
|
||||
@ -681,7 +683,7 @@ void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
|
||||
* @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
|
||||
* @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);
|
||||
|
||||
@ -694,15 +696,15 @@ unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
|
||||
/* media file input */
|
||||
|
||||
/**
|
||||
* finds AVInputFormat based on input format's short name.
|
||||
* 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
|
||||
* @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);
|
||||
|
||||
@ -718,12 +720,12 @@ int av_open_input_stream(AVFormatContext **ic_ptr,
|
||||
* 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 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.
|
||||
* @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,
|
||||
@ -739,14 +741,15 @@ AVFormatContext *av_alloc_format_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 frame rate in case of mpeg2 repeat
|
||||
* function also computes the real frame rate 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 if error.
|
||||
* @todo Let user decide somehow what information is needed so we do not waste time getting stuff the user does not need.
|
||||
* @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);
|
||||
|
||||
@ -758,7 +761,7 @@ int av_find_stream_info(AVFormatContext *ic);
|
||||
*
|
||||
* @param s media file handle
|
||||
* @param pkt is filled
|
||||
* @return 0 if OK. AVERROR_xxx if error.
|
||||
* @return 0 if OK, AVERROR_xxx on error
|
||||
*/
|
||||
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
|
||||
|
||||
@ -775,11 +778,11 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt);
|
||||
*
|
||||
* pkt->pts, pkt->dts and pkt->duration are always set to correct
|
||||
* values in AVStream.timebase units (and guessed if the format cannot
|
||||
* provided 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
|
||||
* 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 if error or end of file.
|
||||
* @return 0 if OK, < 0 on error or end of file
|
||||
*/
|
||||
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
|
||||
|
||||
@ -789,16 +792,16 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt);
|
||||
* @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 there is no stream specified then in AV_TIME_BASE units
|
||||
* @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);
|
||||
|
||||
/**
|
||||
* start playing a network based stream (e.g. RTSP stream) at the
|
||||
* current position
|
||||
* Start playing a network based stream (e.g. RTSP stream) at the
|
||||
* current position.
|
||||
*/
|
||||
int av_read_play(AVFormatContext *s);
|
||||
|
||||
@ -830,7 +833,7 @@ void av_close_input_file(AVFormatContext *s);
|
||||
* can be added in read_packet too.
|
||||
*
|
||||
* @param s media file handle
|
||||
* @param id file format dependent stream id
|
||||
* @param id file-format-dependent stream ID
|
||||
*/
|
||||
AVStream *av_new_stream(AVFormatContext *s, int id);
|
||||
AVProgram *av_new_program(AVFormatContext *s, int id);
|
||||
@ -838,15 +841,15 @@ AVProgram *av_new_program(AVFormatContext *s, int id);
|
||||
/**
|
||||
* Add a new chapter.
|
||||
* This function is NOT part of the public API
|
||||
* and should be ONLY used by demuxers.
|
||||
* and should ONLY be used by demuxers.
|
||||
*
|
||||
* @param s media file handle
|
||||
* @param id unique id for this chapter
|
||||
* @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 if error.
|
||||
* @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);
|
||||
|
||||
@ -864,15 +867,15 @@ void av_set_pts_info(AVStream *s, int pts_wrap_bits,
|
||||
|
||||
#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 >=
|
||||
* @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
|
||||
*/
|
||||
@ -888,7 +891,8 @@ int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
|
||||
void ff_reduce_index(AVFormatContext *s, int stream_index);
|
||||
|
||||
/**
|
||||
* Add a index entry into a sorted list updateing if it is already there.
|
||||
* 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
|
||||
*/
|
||||
@ -904,10 +908,10 @@ int av_add_index_entry(AVStream *st,
|
||||
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
|
||||
|
||||
/**
|
||||
* Updates cur_dts of all streams based on given timestamp and AVStream.
|
||||
* Updates cur_dts of all streams based on the 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).
|
||||
* 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
|
||||
*/
|
||||
@ -929,7 +933,7 @@ int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
|
||||
* output media file.
|
||||
*
|
||||
* @param s media file handle
|
||||
* @return 0 if OK. AVERROR_xxx if error.
|
||||
* @return 0 if OK, AVERROR_xxx on error
|
||||
*/
|
||||
int av_write_header(AVFormatContext *s);
|
||||
|
||||
@ -938,11 +942,11 @@ int av_write_header(AVFormatContext *s);
|
||||
*
|
||||
* 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
|
||||
* 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 if error, = 0 if OK, 1 if end of stream wanted.
|
||||
* @return < 0 on error, = 0 if OK, 1 if end of stream wanted
|
||||
*/
|
||||
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
|
||||
|
||||
@ -958,12 +962,12 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt);
|
||||
*
|
||||
* @param s media file handle
|
||||
* @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
|
||||
* @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
|
||||
* @return < 0 on error, = 0 if OK, 1 if end of stream wanted
|
||||
*/
|
||||
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
|
||||
|
||||
/**
|
||||
* Interleave a packet per DTS in an output media file.
|
||||
* Interleave a packet per dts in an output media file.
|
||||
*
|
||||
* Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
|
||||
* so they cannot be used after it, note calling av_free_packet() on them is still safe.
|
||||
@ -985,7 +989,7 @@ int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pk
|
||||
* May only be called after a successful call to av_write_header.
|
||||
*
|
||||
* @param s media file handle
|
||||
* @return 0 if OK. AVERROR_xxx if error.
|
||||
* @return 0 if OK, AVERROR_xxx on error
|
||||
*/
|
||||
int av_write_trailer(AVFormatContext *s);
|
||||
|
||||
@ -995,7 +999,7 @@ void dump_format(AVFormatContext *ic,
|
||||
int is_output);
|
||||
|
||||
/**
|
||||
* parses width and height out of string str.
|
||||
* 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);
|
||||
@ -1015,7 +1019,7 @@ attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
|
||||
* @endcode
|
||||
* Time is local time 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
|
||||
* 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
|
||||
@ -1037,7 +1041,7 @@ 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);
|
||||
@ -1053,7 +1057,7 @@ int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
|
||||
|
||||
/**
|
||||
* Returns in 'buf' the path with '%d' replaced by number.
|
||||
|
||||
*
|
||||
* Also handles the '%0nd' format where 'n' is the total number
|
||||
* of digits and '%%'.
|
||||
*
|
||||
@ -1061,7 +1065,7 @@ int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
|
||||
* @param buf_size destination buffer size
|
||||
* @param path numbered sequence string
|
||||
* @param number frame number
|
||||
* @return 0 if OK, -1 if format error.
|
||||
* @return 0 if OK, -1 on format error
|
||||
*/
|
||||
int av_get_frame_filename(char *buf, int buf_size,
|
||||
const char *path, int number);
|
||||
@ -1070,7 +1074,7 @@ int av_get_frame_filename(char *buf, int buf_size,
|
||||
* 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.
|
||||
* @return 1 if a valid numbered sequence string, 0 otherwise
|
||||
*/
|
||||
int av_filename_number_test(const char *filename);
|
||||
|
||||
@ -1081,12 +1085,12 @@ int av_filename_number_test(const char *filename);
|
||||
* 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
|
||||
* 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
|
||||
* the caller)
|
||||
* @param size the size of the buffer
|
||||
* @return 0 if OK. AVERROR_xxx if error.
|
||||
* @return 0 if OK, AVERROR_xxx on error
|
||||
*/
|
||||
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user