Modules | |
| RIFF FourCCs | |
| Get the tables mapping RIFF FourCCs to libavcodec AVCodecIDs. | |
Functions | |
| void | av_hex_dump (FILE *f, uint8_t *buf, int size) |
| Send a nice hexadecimal dump of a buffer to the specified file stream. | |
| void | av_hex_dump_log (void *avcl, int level, uint8_t *buf, int size) |
| Send a nice hexadecimal dump of a buffer to the log. | |
| void | av_pkt_dump2 (FILE *f, AVPacket *pkt, int dump_payload, AVStream *st) |
| Send a nice dump of a packet to the specified file stream. | |
| void | av_pkt_dump_log2 (void *avcl, int level, AVPacket *pkt, int dump_payload, AVStream *st) |
| Send a nice dump of a packet to the log. | |
| enum AVCodecID | av_codec_get_id (const struct AVCodecTag *const *tags, unsigned int tag) |
| Get the AVCodecID for the given codec tag tag. | |
| unsigned int | av_codec_get_tag (const struct AVCodecTag *const *tags, enum AVCodecID id) |
| Get the codec tag for the given codec id id. | |
| int | av_find_default_stream_index (AVFormatContext *s) |
| int | av_index_search_timestamp (AVStream *st, int64_t timestamp, int flags) |
| Get the index for a specific timestamp. | |
| int | av_add_index_entry (AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags) |
| Add an index entry into a sorted list. | |
| void | av_url_split (char *proto, int proto_size, char *authorization, int authorization_size, char *hostname, int hostname_size, int *port_ptr, char *path, int path_size, const char *url) |
| Split a URL string into components. | |
| void | av_dump_format (AVFormatContext *ic, int index, const char *url, int is_output) |
| int | av_get_frame_filename (char *buf, int buf_size, const char *path, int number) |
| Return in 'buf' the path with 'd' replaced by a number. | |
| int | av_filename_number_test (const char *filename) |
| Check whether filename actually is a numbered sequence generator. | |
| int | av_sdp_create (AVFormatContext *ac[], int n_files, char *buf, int size) |
| Generate an SDP for an RTP session. | |
| int | av_match_ext (const char *filename, const char *extensions) |
| Return a positive value if the given filename has one of the given extensions, 0 otherwise. | |
| int | avformat_query_codec (AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance) |
| Test if the given container can store a codec. | |
| AVRational | av_guess_sample_aspect_ratio (AVFormatContext *format, AVStream *stream, AVFrame *frame) |
| Guess the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio. | |
| int | avformat_match_stream_specifier (AVFormatContext *s, AVStream *st, const char *spec) |
| Check if the stream st contained in s is matched by the stream specifier spec. | |
| void | avformat_queue_attached_pictures (AVFormatContext *s) |
| int av_add_index_entry | ( | AVStream * | st, | |
| int64_t | pos, | |||
| int64_t | timestamp, | |||
| int | size, | |||
| int | distance, | |||
| int | flags | |||
| ) |
Add an index entry into a sorted list.
Update the entry if the list already contains it.
| timestamp | timestamp in the time base of the given stream |
Definition at line 1664 of file utils.c.
Referenced by ape_read_header(), asf_build_simple_index(), asf_read_pts(), av_read_frame(), avi_read_idx1(), avi_sync(), clean_index(), find_and_decode_index(), flv_read_packet(), gxf_read_index(), matroska_add_index_entries(), matroska_parse_block(), mov_read_trun(), mpc8_parse_seektable(), mpc_read_packet(), mpegps_read_pes_header(), mpegts_get_dts(), nsv_parse_NSVs_header(), nut_write_packet(), nuv_read_dts(), parse_keyframes_index(), pmp_header(), pva_read_header(), read_braindead_odml_indx(), read_frame_internal(), read_header(), read_pakt_chunk(), read_part_of_packet(), read_xing_toc(), rl2_read_header(), rm_read_dts(), rm_read_index(), rm_read_packet(), rpl_read_header(), tta_read_header(), wv_read_packet(), and xwma_read_header().
| enum AVCodecID av_codec_get_id | ( | const struct AVCodecTag *const * | tags, | |
| unsigned int | tag | |||
| ) |
Get the AVCodecID for the given codec tag tag.
If no codec id is found returns AV_CODEC_ID_NONE.
| tags | list of supported codec_id-codec_tag pairs, as stored in AVInputFormat.codec_tag and AVOutputFormat.codec_tag |
Referenced by decode_stream_header(), and transcode_init().
| unsigned int av_codec_get_tag | ( | const struct AVCodecTag *const * | tags, | |
| enum AVCodecID | id | |||
| ) |
Get the codec tag for the given codec id id.
If no codec tag is found returns 0.
| tags | list of supported codec_id-codec_tag pairs, as stored in AVInputFormat.codec_tag and AVOutputFormat.codec_tag |
Referenced by avformat_query_codec(), avformat_write_header(), and transcode_init().
| void av_dump_format | ( | AVFormatContext * | ic, | |
| int | index, | |||
| const char * | url, | |||
| int | is_output | |||
| ) |
Definition at line 4001 of file utils.c.
Referenced by main(), open_input_file(), opt_input_file(), read_thread(), and transcode_init().
| int av_filename_number_test | ( | const char * | filename | ) |
Check whether filename actually is a numbered sequence generator.
| filename | possible numbered sequence string |
Definition at line 337 of file utils.c.
Referenced by av_guess_format(), avformat_open_input(), opt_output_file(), and read_probe().
| int av_find_default_stream_index | ( | AVFormatContext * | s | ) |
Return in 'buf' the path with 'd' replaced by a number.
Also handles the '0nd' format where 'n' is the total number of digits and '%'.
| buf | destination buffer | |
| buf_size | destination buffer size | |
| path | numbered sequence string | |
| number | frame number |
Definition at line 4092 of file utils.c.
Referenced by av_filename_number_test(), find_image_range(), read_packet(), seg_write_header(), segment_start(), and write_packet().
| AVRational av_guess_sample_aspect_ratio | ( | AVFormatContext * | format, | |
| AVStream * | stream, | |||
| AVFrame * | frame | |||
| ) |
Guess the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio.
Since the frame aspect ratio is set by the codec but the stream aspect ratio is set by the demuxer, these two may not be equal. This function tries to return the value that you should use if you would like to display the frame.
Basic logic is to use the stream aspect ratio if it is set to something sane otherwise use the frame aspect ratio. This way a container setting, which is usually easy to modify can override the coded value in the frames.
| format | the format context which the stream is part of | |
| stream | the stream which the frame is part of | |
| frame | the frame with the aspect ratio to be determined |
Definition at line 4672 of file utils.c.
Referenced by queue_picture(), show_frame(), show_stream(), and video_thread().
Send a nice hexadecimal dump of a buffer to the specified file stream.
| f | The file stream pointer where the dump should be sent to. | |
| buf | buffer | |
| size | buffer size |
Definition at line 4176 of file utils.c.
Referenced by pkt_dump_internal().
Send a nice hexadecimal dump of a buffer to the log.
| avcl | A pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct. | |
| level | The importance level of the message, lower values signifying higher importance. | |
| buf | buffer | |
| size | buffer size |
Definition at line 4181 of file utils.c.
Referenced by asf_read_header().
Get the index for a specific timestamp.
| 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 |
Definition at line 1706 of file utils.c.
Referenced by ape_read_seek(), asf_read_seek(), avi_read_packet(), avi_read_seek(), ff_seek_frame_binary(), gxf_seek(), matroska_read_seek(), mov_seek_stream(), mp3_seek(), mpc8_read_seek(), mpc_read_seek(), nsv_read_seek(), nut_write_packet(), read_packet(), read_seek(), rl2_read_seek(), seek_frame_generic(), tta_read_seek(), and wv_read_seek().
| int av_match_ext | ( | const char * | filename, | |
| const char * | extensions | |||
| ) |
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
| extensions | a comma-separated list of filename extensions |
Definition at line 166 of file utils.c.
Referenced by av_guess_format(), av_probe_input_format3(), http_parse_request(), ipod_get_codec_tag(), mpegts_write_header(), nsv_probe(), and seg_write_header().
Send a nice dump of a packet to the log.
| avcl | A pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct. | |
| level | The importance level of the message, lower values signifying higher importance. | |
| pkt | packet to dump | |
| dump_payload | True if the payload must be displayed, too. | |
| st | AVStream that the packet belongs to |
Definition at line 4233 of file utils.c.
Referenced by process_input().
| int av_sdp_create | ( | AVFormatContext * | ac[], | |
| int | n_files, | |||
| char * | buf, | |||
| int | size | |||
| ) |
Generate an SDP for an RTP session.
| 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. | |
| n_files | number of AVCodecContexts contained in ac | |
| buf | buffer where the SDP will be stored (must be allocated by the caller) | |
| size | the size of the buffer |
Definition at line 669 of file sdp.c.
Referenced by ff_rtsp_setup_output_streams(), prepare_sdp_description(), print_sdp(), and sap_write_header().
| void av_url_split | ( | char * | proto, | |
| int | proto_size, | |||
| char * | authorization, | |||
| int | authorization_size, | |||
| char * | hostname, | |||
| int | hostname_size, | |||
| int * | port_ptr, | |||
| char * | path, | |||
| int | path_size, | |||
| const char * | url | |||
| ) |
Split a URL string into components.
The pointers to buffers for storing individual components may be null, in order to ignore that component. Buffers for components not found are set to empty strings. If the port is not found, it is set to a negative value.
| proto | the buffer for the protocol | |
| proto_size | the size of the proto buffer | |
| authorization | the buffer for the authorization | |
| authorization_size | the size of the authorization buffer | |
| hostname | the buffer for the host name | |
| hostname_size | the size of the hostname buffer | |
| port_ptr | a pointer to store the port number in | |
| path | the buffer for the path | |
| path_size | the size of the path buffer | |
| url | the URL to split |
Definition at line 4239 of file utils.c.
Referenced by ff_rtp_set_remote_url(), ff_udp_set_remote_url(), find_rtp_session_with_url(), gopher_open(), http_open_cnx(), mms_open(), mmsh_open_internal(), parse_command_line(), resetup_tcp(), rtmp_http_open(), rtmp_open(), rtmpe_open(), rtp_open(), rtsp_cmd_describe(), rtsp_cmd_setup(), rtsp_listen(), sap_read_header(), sap_write_header(), sctp_open(), tcp_open(), tls_open(), and udp_open().
| int avformat_match_stream_specifier | ( | AVFormatContext * | s, | |
| AVStream * | st, | |||
| const char * | spec | |||
| ) |
Check if the stream st contained in s is matched by the stream specifier spec.
See the "stream specifiers" chapter in the documentation for the syntax of spec.
Definition at line 4695 of file utils.c.
Referenced by check_stream_specifier(), and find_stream().
| int avformat_query_codec | ( | AVOutputFormat * | ofmt, | |
| enum AVCodecID | codec_id, | |||
| int | std_compliance | |||
| ) |
Test if the given container can store a codec.
| std_compliance | standards compliance level, one of FF_COMPLIANCE_* |
Definition at line 4586 of file utils.c.
Referenced by opt_output_file().
| void avformat_queue_attached_pictures | ( | AVFormatContext * | s | ) |
Definition at line 574 of file utils.c.
Referenced by av_seek_frame(), avformat_open_input(), avformat_seek_file(), and read_thread().
1.5.8