FFmpeg
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#include <stdint.h>
#include "config.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/time.h"
#include "libavcodec/internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "os_support.h"
Go to the source code of this file.
Macros | |
#define | SANE_CHUNK_SIZE (50000000) |
Functions | |
static int | append_packet_chunked (AVIOContext *s, AVPacket *pkt, int size) |
int | av_get_packet (AVIOContext *s, AVPacket *pkt, int size) |
Allocate and read the payload of a packet and initialize its fields with default values. More... | |
int | av_append_packet (AVIOContext *s, AVPacket *pkt, int size) |
Read data and append it to the current content of the AVPacket. More... | |
int | av_filename_number_test (const char *filename) |
Check whether filename actually is a numbered sequence generator. More... | |
unsigned int | ff_codec_get_tag (const AVCodecTag *tags, enum AVCodecID id) |
enum AVCodecID | ff_codec_get_id (const AVCodecTag *tags, unsigned int tag) |
enum AVCodecID | ff_get_pcm_codec_id (int bps, int flt, int be, int sflags) |
Select a PCM codec based on the given parameters. More... | |
unsigned int | av_codec_get_tag (const AVCodecTag *const *tags, enum AVCodecID id) |
int | av_codec_get_tag2 (const AVCodecTag *const *tags, enum AVCodecID id, unsigned int *tag) |
enum AVCodecID | av_codec_get_id (const AVCodecTag *const *tags, unsigned int tag) |
int | ff_alloc_extradata (AVCodecParameters *par, int size) |
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0. More... | |
uint64_t | ff_ntp_time (void) |
Get the current time since NTP epoch in microseconds. More... | |
uint64_t | ff_get_formatted_ntp_time (uint64_t ntp_time_us) |
Get the NTP time stamp formatted as per the RFC-5905. More... | |
uint64_t | ff_parse_ntp_time (uint64_t ntp_ts) |
Parse the NTP time in micro seconds (since NTP epoch). More... | |
int | ff_get_frame_filename (char *buf, int buf_size, const char *path, int64_t number, int flags) |
Return in 'buf' the path with 'd' replaced by a number. More... | |
int | av_get_frame_filename2 (char *buf, int buf_size, const char *path, int number, int flags) |
Return in 'buf' the path with 'd' replaced by a number. More... | |
int | av_get_frame_filename (char *buf, int buf_size, const char *path, int number) |
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. More... | |
int | ff_mkdir_p (const char *path) |
Automatically create sub-directories. More... | |
char * | ff_data_to_hex (char *buff, const uint8_t *src, int s, int lowercase) |
Write hexadecimal string corresponding to given binary data. More... | |
int | ff_hex_to_data (uint8_t *data, const char *p) |
Parse a string of hexadecimal strings. More... | |
void | ff_parse_key_value (const char *str, ff_parse_key_val_cb callback_get_buf, void *context) |
Parse a string with comma-separated key=value pairs. More... | |
int | avformat_network_init (void) |
Do global initialization of network libraries. More... | |
int | avformat_network_deinit (void) |
Undo the initialization done by avformat_network_init. More... | |
int | ff_is_http_proto (const char *filename) |
Utility function to check if the file uses http or https protocol. More... | |
int | ff_bprint_to_codecpar_extradata (AVCodecParameters *par, struct AVBPrint *buf) |
Finalize buf into extradata and set its size appropriately. More... | |
various utility functions for use within FFmpeg
Definition in file utils.c.
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static |
Definition at line 52 of file utils.c.
Referenced by av_append_packet(), and av_get_packet().
int av_get_packet | ( | AVIOContext * | s, |
AVPacket * | pkt, | ||
int | size | ||
) |
Allocate and read the payload of a packet and initialize its fields with default values.
s | associated IO context |
pkt | packet |
size | desired payload size |
Definition at line 91 of file utils.c.
Referenced by aa_read_packet(), aal_read_packet(), aax_read_packet(), ac4_read_packet(), ace_read_packet(), adp_read_packet(), ads_read_packet(), adts_aac_read_packet(), adx_read_packet(), aea_read_packet(), afc_read_packet(), aiff_read_packet(), aix_read_packet(), apc_read_packet(), aptx_hd_read_packet(), aptx_read_packet(), argo_brp_read_packet(), asf_read_header(), asf_read_subpayload(), ast_read_packet(), audio_frame_obu(), av_append_packet(), avi_read_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), cine_read_packet(), codec2_read_packet(), dat_read_packet(), daud_packet(), dcstr_read_packet(), dfa_read_packet(), dhav_read_packet(), dsf_read_packet(), dxa_read_packet(), ea_read_packet(), evc_read_packet(), ff_add_attached_pic(), ff_pcm_read_packet(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_voc_get_packet(), film_read_packet(), flv_data_packet(), flv_read_packet(), fourxm_read_packet(), frm_read_packet(), fsb_read_packet(), g726_read_packet(), g729_read_packet(), gdv_read_packet(), genh_read_packet(), gsm_read_packet(), gxf_packet(), hca_read_packet(), hnm_read_packet(), idcin_read_packet(), iff_read_packet(), ifv_read_packet(), ilbc_read_packet(), ingenient_read_packet(), iss_read_packet(), lmlm4_read_packet(), load_ipmovie_packet(), lvf_read_packet(), mmf_read_packet(), mods_read_packet(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), mpjpeg_read_packet(), msf_read_packet(), msnwc_tcp_read_packet(), msp_read_packet(), mtaf_read_packet(), mtv_read_packet(), musx_read_packet(), mv_read_packet(), mxf_decrypt_triplet(), mxf_get_d10_aes3_packet(), mxf_get_eia608_packet(), mxf_read_packet(), nc_read_packet(), nsv_read_chunk(), nuv_packet(), parse_chunk(), pdv_read_packet(), pmp_packet(), pp_bnk_read_packet(), pva_read_packet(), qcp_read_packet(), r3d_read_reda(), r3d_read_redv(), raw_read_packet(), rawvideo_read_packet(), rcwt_read_header(), read_dst_frame(), read_packet(), redspark_read_packet(), rka_read_packet(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rsd_read_packet(), s337m_read_packet(), scd_read_packet(), sdns_read_packet(), sdr2_read_packet(), seq_read_packet(), ser_read_packet(), siff_read_packet(), simbiosis_imx_read_packet(), smacker_read_packet(), smjpeg_read_packet(), smush_read_packet(), sol_read_packet(), sup_read_packet(), svag_read_packet(), svs_read_packet(), swf_read_packet(), thp_read_packet(), threedostr_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), vag_read_packet(), vc1t_read_packet(), vid_read_packet(), viv_read_packet(), vivo_read_packet(), vpk_read_packet(), wavarc_read_packet(), wc3_read_packet(), wsaud_read_packet(), wsvqa_read_packet(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_video_packet(), xvag_read_packet(), xwma_read_packet(), yop_read_packet(), and yuv4_read_packet().
int av_append_packet | ( | AVIOContext * | s, |
AVPacket * | pkt, | ||
int | size | ||
) |
Read data and append it to the current content of the AVPacket.
If pkt->size is 0 this is identical to av_get_packet. Note that this uses av_grow_packet and thus involves a realloc which is inefficient. Thus this function should only be used when there is no reasonable way to know (an upper bound of) the final size.
s | associated IO context |
pkt | packet |
size | amount of data to read |
Definition at line 107 of file utils.c.
Referenced by adts_aac_read_packet(), apng_read_packet(), dfa_read_packet(), ea_read_packet(), fits_read_packet(), handle_id3(), is_image(), moflex_read_packet(), mpjpeg_read_packet(), msp_read_packet(), read_packet(), sup_read_packet(), vivo_read_packet(), wc3_read_header(), wc3_read_packet(), and wsvqa_read_packet().
unsigned int ff_codec_get_tag | ( | const AVCodecTag * | tags, |
enum AVCodecID | id | ||
) |
Definition at line 123 of file utils.c.
Referenced by ast_write_header(), caf_write_header(), flv_init(), flv_write_packet(), gxf_write_header(), ircam_write_header(), mkv_assemble_codecprivate(), mkv_write_track(), mov_find_codec_tag(), mov_get_codec_tag(), mov_write_esds_tag(), mov_write_isml_manifest(), put_eos_tag(), smjpeg_write_header(), swf_write_header(), swf_write_video(), and write_stream_codec_info().
enum AVCodecID ff_codec_get_id | ( | const AVCodecTag * | tags, |
unsigned int | tag | ||
) |
Definition at line 133 of file utils.c.
Referenced by aac_decoder_config(), asf_read_stream_properties(), ast_read_header(), av_codec_get_id(), avi_read_header(), create_new_audio_stream(), decode_stream_header(), ff_mp4_read_dec_config_descr(), ff_rm_read_mdpr_codecdata(), ff_voc_get_packet(), ff_wav_codec_get_id(), get_aiff_header(), get_codec_data(), ircam_read_header(), lvf_read_header(), lxf_read_header(), mkv_assemble_codecprivate(), mkv_assemble_native_codecprivate(), mov_codec_id(), mov_skip_multiple_stsd(), nsv_parse_NSVs_header(), ogm_dshow_header(), ogm_header(), oma_read_header(), parse_dsd_prop(), parse_media_type(), parse_video_info(), read_desc_chunk(), read_header(), rm_read_audio_stream_info(), rsd_read_header(), rso_read_header(), smjpeg_read_header(), and swf_read_packet().
enum AVCodecID ff_get_pcm_codec_id | ( | int | bps, |
int | flt, | ||
int | be, | ||
int | sflags | ||
) |
Select a PCM codec based on the given parameters.
bps | bits-per-sample |
flt | floating-point |
be | big-endian |
sflags | signed flags. each bit corresponds to one byte of bit depth. e.g. the 1st bit indicates if 8-bit should be signed or unsigned, the 2nd bit indicates if 16-bit should be signed or unsigned, etc... This is useful for formats such as WAVE where only 8-bit is unsigned and all other bit depths are signed. |
Definition at line 144 of file utils.c.
Referenced by avr_read_header(), ff_mov_get_lpcm_codec_id(), ff_wav_codec_get_id(), get_codec_data(), nist_read_header(), and pvf_read_header().
unsigned int av_codec_get_tag | ( | const AVCodecTag *const * | tags, |
enum AVCodecID | id | ||
) |
int av_codec_get_tag2 | ( | const AVCodecTag *const * | tags, |
enum AVCodecID | id, | ||
unsigned int * | tag | ||
) |
Definition at line 201 of file utils.c.
Referenced by av_codec_get_tag().
enum AVCodecID av_codec_get_id | ( | const AVCodecTag *const * | tags, |
unsigned int | tag | ||
) |
int ff_alloc_extradata | ( | AVCodecParameters * | par, |
int | size | ||
) |
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Previously allocated extradata in par will be freed.
size | size of extradata |
Definition at line 227 of file utils.c.
Referenced by ace_read_header(), adts_write_packet(), afc_read_header(), ape_read_header(), apng_read_header(), celt_header(), codec2_read_header(), codec2raw_read_header(), concat_parse_script(), copy_stream_props(), dfa_read_header(), encode_intervals(), ff_generate_avci_extradata(), ff_get_extradata(), ff_parse_mpeg2_descriptor(), flac_header(), flv_set_video_codec(), flv_write_packet(), fsb_read_header(), genh_read_header(), hca_read_header(), hcom_read_header(), hevc_parse_sdp_line(), hnm_read_header(), iff_read_header(), latm_write_packet(), microdvd_read_header(), mkv_update_codecprivate(), mov_create_chapter_track(), mov_read_dops(), mov_rewrite_dvd_sub_extradata(), msf_read_header(), mxf_parse_structural_metadata(), nist_read_header(), nsv_parse_NSVs_header(), ogm_header(), oma_read_header(), opus_header(), opus_write_extradata(), parse_fmtp_config(), parse_packed_headers(), qdm2_parse_config(), read_header(), read_kuki_chunk(), redspark_read_header(), rsd_read_header(), sdns_read_header(), seg_write_packet(), smacker_read_header(), smush_read_header(), speex_header(), svq3_parse_packet(), track_header(), tta_read_header(), update_stream_extradata(), vmd_read_header(), vqf_read_header(), wavarc_read_header(), wsvqa_read_packet(), wv_read_header(), xmv_process_packet_header(), and xwma_read_header().
uint64_t ff_ntp_time | ( | void | ) |
Get the current time since NTP epoch in microseconds.
Definition at line 247 of file utils.c.
Referenced by mov_write_prft_tag(), rtp_write_header(), rtp_write_packet(), and rtp_write_trailer().
uint64_t ff_get_formatted_ntp_time | ( | uint64_t | ntp_time_us | ) |
Get the NTP time stamp formatted as per the RFC-5905.
ntp_time | NTP time in micro seconds (since NTP epoch) |
Definition at line 252 of file utils.c.
Referenced by mov_write_prft_tag().
uint64_t ff_parse_ntp_time | ( | uint64_t | ntp_ts | ) |
Parse the NTP time in micro seconds (since NTP epoch).
ntp_ts | NTP time stamp formatted as per the RFC-5905. |
Definition at line 274 of file utils.c.
Referenced by rtp_set_prft().
int ff_get_frame_filename | ( | char * | buf, |
int | buf_size, | ||
const char * | path, | ||
int64_t | number, | ||
int | flags | ||
) |
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 | path with substitution template |
number | the number to substitute |
flags | AV_FRAME_FILENAME_FLAGS_* |
Definition at line 283 of file utils.c.
Referenced by av_get_frame_filename(), av_get_frame_filename2(), and write_packet().
int ff_mkdir_p | ( | const char * | path | ) |
Automatically create sub-directories.
path | will create sub-directories by path |
Definition at line 414 of file utils.c.
Referenced by format_name(), and hls_start().
char* ff_data_to_hex | ( | char * | buf, |
const uint8_t * | src, | ||
int | size, | ||
int | lowercase | ||
) |
Write hexadecimal string corresponding to given binary data.
The string is zero-terminated.
buf | the output string is written here; needs to be at least 2 * size + 1 bytes long. |
src | the input data to be transformed. |
size | the size (in byte) of src. |
lowercase | determines whether to use the range [0-9a-f] or [0-9A-F]. |
Definition at line 448 of file utils.c.
Referenced by aa_read_header(), do_encrypt(), do_llnw_auth(), ff_rdt_calc_response_and_checksum(), hex_log(), hls_encryption_start(), hls_read_header(), make_digest_auth(), md5_close(), mov_read_adrm(), mxf_umid_to_str(), open_input(), param_write_hex(), and tak_read_header().
int ff_hex_to_data | ( | uint8_t * | data, |
const char * | p | ||
) |
Parse a string of hexadecimal strings.
Any space between the hexadecimal digits is ignored.
data | if non-null, the parsed data is written to this pointer |
p | the string to parse |
Definition at line 469 of file utils.c.
Referenced by concat_parse_script(), parse_fmtp_config(), and parse_playlist().
void ff_parse_key_value | ( | const char * | str, |
ff_parse_key_val_cb | callback_get_buf, | ||
void * | context | ||
) |
Parse a string with comma-separated key=value pairs.
The value strings may be quoted and may contain escaped characters within quoted strings.
str | the string to parse |
callback_get_buf | function that returns where to store the unescaped value string. |
context | the opaque context pointer to pass to callback_get_buf |
Definition at line 497 of file utils.c.
Referenced by ff_http_auth_handle_header(), and parse_playlist().
int ff_is_http_proto | ( | const char * | filename | ) |
Utility function to check if the file uses http or https protocol.
s | AVFormatContext |
filename | URL or file name to open for writing |
Definition at line 572 of file utils.c.
Referenced by dashenc_delete_file(), dashenc_io_close(), dashenc_io_open(), hls_init(), hlsenc_io_close(), hlsenc_io_open(), and set_http_options().
int ff_bprint_to_codecpar_extradata | ( | AVCodecParameters * | par, |
struct AVBPrint * | buf | ||
) |
Finalize buf into extradata and set its size appropriately.
Definition at line 577 of file utils.c.
Referenced by ass_read_header(), ff_dvdclut_palette_extradata_cat(), jacosub_read_header(), sami_read_header(), and subviewer_read_header().