FFmpegfs utility set implementation. More...

#include <libswscale/swscale.h>
#include "libavutil/ffversion.h"
#include <libavcodec/avcodec.h>
#include "id3v1tag.h"
#include "ffmpegfs.h"
#include <iostream>
#include <libgen.h>
#include <algorithm>
#include <wordexp.h>
#include <memory>
#include <fstream>
#include <sstream>
#include <locale>
#include <codecvt>
#include <vector>
#include <cstring>
#include <functional>
#include <chrono>
#include <thread>
#include <iconv.h>
#include <chardet.h>
#include <fnmatch.h>
#include <unistd.h>
#include <libswresample/swresample.h>

Include dependency graph for ffmpeg_utils.cc:

Go to the source code of this file.

Macros
#define	AV_ERROR_MAX_STRING_SIZE 128
	Max. length of a FFmpeg error string. More...

#define	PRINT_LIB_INFO(libname, LIBNAME)
	Print info about a FFmpeg library. More...

#define	STR_VALUE(arg) #arg
	Convert macro to string. More...

#define	X(name) STR_VALUE(name)
	Convert macro to string. More...

Typedefs
typedef std::map< const std::string, const FILETYPE, comp >	FILETYPE_MAP
	Map of file type. One entry per supported type. More...

Functions
static int	is_device (__attribute__((unused)) const AVClass *avclass)
	Check if class is a FMmpeg device. More...

static std::string	ffmpeg_libinfo (bool lib_exists, __attribute__((unused)) unsigned int version, __attribute__((unused)) const char cfg, int version_minor, int version_major, int version_micro, const char libname)
	Get FFmpeg library info. More...

const std::string &	append_sep (std::string *path)
	Add / to the path if required. More...

const std::string &	append_filename (std::string *path, const std::string &filename)
	Add filename to path, including / after the path if required. More...

const std::string &	remove_sep (std::string *path)
	Remove / from the path. More...

const std::string &	remove_filename (std::string *filepath)
	Remove filename from path. Handy dirname alternative. More...

const std::string &	remove_path (std::string *filepath)
	Remove path from filename. Handy basename alternative. More...

const std::string &	remove_ext (std::string *filepath)
	Remove extension from filename. More...

bool	find_ext (std::string *ext, const std::string &filename)
	Find extension in filename, if existing. More...

bool	check_ext (const std::string &ext, const std::string &filename)
	Check if filename has a certain extension. The check is case sensitive. More...

const std::string &	replace_ext (std::string *filepath, const std::string &ext)
	Replace extension in filename, taking into account that there might not be an extension already. More...

const std::string &	append_ext (std::string *filepath, const std::string &ext)
	Append extension to filename. If ext is the same as. More...

std::shared_ptr< char[]>	new_strdup (const std::string &str)
	strdup() variant taking a std::string as input. More...

std::string	ffmpeg_geterror (int errnum)
	Get FFmpeg error string for errnum. Internally calls av_strerror(). More...

int64_t	ffmpeg_rescale_q (int64_t ts, const AVRational &timebase_in, const AVRational &timebase_out)
	Convert a FFmpeg time from in timebase to outtime base. More...

int64_t	ffmpeg_rescale_q_rnd (int64_t ts, const AVRational &timebase_in, const AVRational &timebase_out)
	Convert a FFmpeg time from in timebase to out timebase with rounding. More...

const char *	get_media_type_string (enum AVMediaType media_type)
	av_get_media_type_string is missing, so we provide our own. More...

std::string	ffmpeg_libinfo ()
	Get info about the FFmpeg libraries used. More...

int	show_caps (int device_only)
	Lists all supported codecs and devices. More...

const char *	get_codec_name (AVCodecID codec_id, bool long_name)
	Safe way to get the codec name. Function never fails, will return "unknown" on error. More...

int	mktree (const std::string &path, mode_t mode)
	Make directory tree. More...

void	tempdir (std::string &path)
	Get temporary directory. More...

int	supports_albumart (FILETYPE filetype)
	Check if file type supports album arts. More...

FILETYPE	get_filetype (const std::string &desttype)
	Get the FFmpegfs filetype, desttype must be one of FFmpeg's "official" short names for formats. More...

std::string	get_filetype_text (FILETYPE filetype)
	Convert FILETYPE enum to human readable text. More...

FILETYPE	get_filetype_from_list (const std::string &desttypelist)
	Get the FFmpegfs filetype, desttypelist must be a comma separated list of FFmpeg's "official" short names for formats. Will return the first match. Same as get_filetype, but accepts a comma separated list. More...

void	init_id3v1 (ID3v1 *id3v1)
	Initialise ID3v1 tag. More...

std::string	format_number (int64_t value)
	Format numeric value. More...

std::string	format_bitrate (BITRATE value)
	Format a bit rate. More...

std::string	format_samplerate (int value)
	Format a samplerate. More...

std::string	format_duration (int64_t value, uint32_t fracs)
	Format a time in format HH:MM:SS.fract. More...

std::string	format_time (time_t value)
	Format a time in format "w d m s". More...

std::string	format_size (uint64_t value)
	Format size. More...

std::string	format_size_ex (uint64_t value)
	Format size. More...

std::string	format_result_size (size_t size_resulting, size_t size_predicted)
	Format size of transcoded file including difference between predicted and resulting size. More...

std::string	format_result_size_ex (size_t size_resulting, size_t size_predicted)
	Format size of transcoded file including difference between predicted and resulting size. More...

static void	print_fps (double d, const char *postfix)
	Print frames per second. More...

int	print_stream_info (const AVStream *stream)
	Print info about an AVStream. More...

std::string	fourcc_make_string (std::string *buf, uint32_t fourcc)

void	exepath (std::string *path)
	Path to FFmpegfs binary. More...

std::string &	ltrim (std::string &s)
	trim from start More...

std::string &	rtrim (std::string &s)
	trim from end More...

std::string &	trim (std::string &s)
	trim from both ends More...

std::string	replace_all (std::string str, const std::string &from, const std::string &to)
	Same as std::string replace(), but replaces all occurrences. More...

std::string	replace_all (std::string *str, const std::string &from, const std::string &to)
	Same as std::string replace(), but replaces string in-place. More...

bool	replace_start (std::string *str, const std::string &from, const std::string &to)
	Replace start of string from "from" to "to". More...

int	strcasecmp (const std::string &s1, const std::string &s2)
	strcasecmp() equivalent for std::string. More...

int	reg_compare (const std::string &value, const std::string &pattern, std::regex::flag_type flag)
	Compare value with pattern. More...

const std::string &	expand_path (std::string *tgt, const std::string &src)
	Expand path, e.g., expand ~/ to home directory. More...

int	is_mount (const std::string &path)
	Check if path is a mount. More...

std::vector< std::string >	split (const std::string &input, const std::string &regex)
	Split string into an array delimited by a regular expression. More...

std::string	sanitise_filepath (std::string *filepath)
	Sanitise file name. Calls realpath() to remove duplicate // or resolve ../.. etc. Changes the path in place. More...

std::string	sanitise_filepath (const std::string &filepath)
	Sanitise file name. Calls realpath() to remove duplicate // or resolve ../.. etc. More...

void	append_basepath (std::string origpath, const char path)
	Translate file names from FUSE to the original absolute path. More...

bool	is_album_art (AVCodecID codec_id, const AVRational *frame_rate)
	Minimal check if codec is an album art. Requires frame_rate to decide whether this is a video stream if codec_id is not BMP or PNG (which means its undoubtedly an album art). For MJPEG this may also be a video stream if the frame rate is high enough. More...

int	nocasecompare (const std::string &lhs, const std::string &rhs)
	nocasecompare to make std::string find operations case insensitive More...

size_t	get_disk_free (std::string &path)
	Get free disk space. More...

bool	check_ignore (size_t size, size_t offset)
	For use with win_smb_fix=1: Check if this an illegal access offset by Windows. More...

std::string	make_filename (uint32_t file_no, const std::string &fileext)
	Make a file name from file number and file extension. More...

bool	file_exists (const std::string &filename)
	Check if file exists. More...

void	make_upper (std::string *input)
	Convert string to upper case. More...

void	make_lower (std::string *input)
	Convert string to lower case. More...

const char *	hwdevice_get_type_name (AVHWDeviceType dev_type)

int	to_utf8 (std::string &text, const std::string &encoding)
	Convert almost any encoding to UTF-8. To get a list of all possible encodings run "iconv --list". More...

int	get_encoding (const char *str, std::string &encoding)
	Try to detect the encoding of str. This is relatively realiable, but may be wrong. More...

int	read_file (const std::string &path, std::string &result)
	Read text file and return in UTF-8 format, no matter in which encoding the input file is. UTF-8/16/32 with BOM will always return a correct result. For all other encodings the function tries to detect it, that may fail. More...

void	stat_set_size (struct stat *st, size_t size)
	Properly fill in all size related members in stat struct. More...

bool	detect_docker ()
	Detect if we are running under Docker. More...

bool	is_text_codec (AVCodecID codec_id)
	Check if subtitle codec is a text or graphical codec. More...

int	get_audio_props (AVFormatContext format_ctx, int channels, int *samplerate)
	Get first audio stream. More...

const std::string &	regex_escape (std::string *str)
	Escape characters that are meaningful to regexp. More...

bool	is_selected (const std::string &ext)
	Find extension in include list, if existing. More...

bool	is_blocked (const std::string &filename)
	Check if filename should be hidden from output path. More...

void	save_free (void **p)
	Savely free memory: Pointer will be set to nullptr before it is actually freed. More...

void	mssleep (int milliseconds)
	Sleep for specified time. More...

void	ussleep (int microseconds)
	Sleep for specified time. More...

void	nssleep (int nanoseconds)
	Sleep for specified time. More...

Variables
static const FILETYPE_MAP	filetype_map

Detailed Description

FFmpegfs utility set implementation.

Author: Norbert Schlia (nschl.nosp@m.ia@o.nosp@m.blivi.nosp@m.on-s.nosp@m.oftwa.nosp@m.re.d.nosp@m.e)

Copyright: Copyright (C) 2017-2024 Norbert Schlia (nschl.nosp@m.ia@o.nosp@m.blivi.nosp@m.on-s.nosp@m.oftwa.nosp@m.re.d.nosp@m.e)

Definition in file ffmpeg_utils.cc.

Macro Definition Documentation

◆ AV_ERROR_MAX_STRING_SIZE

#define AV_ERROR_MAX_STRING_SIZE 128

Max. length of a FFmpeg error string.

Definition at line 95 of file ffmpeg_utils.cc.

◆ PRINT_LIB_INFO

#define PRINT_LIB_INFO	(	libname,
		LIBNAME
	)

Value:

ffmpeg_libinfo(true, libname##_version(), libname##_configuration(), \

LIB##LIBNAME##_VERSION_MAJOR, LIB##LIBNAME##_VERSION_MINOR, LIB##LIBNAME##_VERSION_MICRO, #libname)

ffmpeg_libinfo

static std::string ffmpeg_libinfo(bool lib_exists, __attribute__((unused)) unsigned int version, __attribute__((unused)) const char *cfg, int version_minor, int version_major, int version_micro, const char *libname)

Get FFmpeg library info.

Definition: ffmpeg_utils.cc:1213

Print info about a FFmpeg library.

Definition at line 1233 of file ffmpeg_utils.cc.

◆ STR_VALUE

#define STR_VALUE ( arg ) #arg

Convert macro to string.

Definition at line 1547 of file ffmpeg_utils.cc.

◆ X

#define X ( name ) STR_VALUE(name)

Convert macro to string.

Definition at line 1548 of file ffmpeg_utils.cc.

Typedef Documentation

◆ FILETYPE_MAP

typedef std::map<const std::string, const FILETYPE, comp> FILETYPE_MAP

Map of file type. One entry per supported type.

Definition at line 98 of file ffmpeg_utils.cc.

Function Documentation

◆ append_basepath()

void append_basepath	(	std::string *	origpath,
		const char *	path
	)

Translate file names from FUSE to the original absolute path.

Parameters

[out]	origpath	- Upon return, contains the name and path of the original file.
[in]	path	- Filename and relative path of the original file.

Definition at line 1996 of file ffmpeg_utils.cc.

Referenced by ffmpegfs_fgetattr(), ffmpegfs_getattr(), ffmpegfs_open(), ffmpegfs_read(), ffmpegfs_readdir(), ffmpegfs_readlink(), and ffmpegfs_statfs().

◆ append_ext()

const std::string & append_ext	(	std::string *	filepath,
		const std::string &	ext
	)

Append extension to filename. If ext is the same as.

Parameters

[in]	filepath	- Filename to add extension to.
[in]	ext	- Extension to add.

Returns: Returns constant reference to filename.

Definition at line 1106 of file ffmpeg_utils.cc.

References strcasecmp().

Referenced by check_cuesheet(), parse_cuesheet(), and virtual_name().

◆ append_filename()

const std::string & append_filename	(	std::string *	path,
		const std::string &	filename
	)

Add filename to path, including / after the path if required.

Parameters

[in]	path	- Path to add filename to.
[in]	filename	- File name to add.

Returns: Returns constant reference to path.

Definition at line 993 of file ffmpeg_utils.cc.

References append_sep().

Referenced by find_original(), and Cache::load_index().

◆ append_sep()

const std::string & append_sep ( std::string * path )

Add / to the path if required.

Parameters

[in] path - Path to add separator to.

Returns: Returns constant reference to path.

Definition at line 983 of file ffmpeg_utils.cc.

Referenced by append_filename(), check_bluray(), check_cuesheet(), check_dvd(), check_vcd(), ffmpegfs_getattr(), ffmpegfs_opt_proc(), ffmpegfs_readdir(), VCDUTILS::get_directory(), insert_dir(), main(), parse_cuesheet(), remove_filename(), and transcoder_cache_path().

◆ check_ext()

bool check_ext	(	const std::string &	ext,
		const std::string &	filename
	)

Check if filename has a certain extension. The check is case sensitive.

Parameters

ext	- Extension to check.
filename	- Filename to check

Returns: Returns true if extension matches, false if not

Definition at line 1078 of file ffmpeg_utils.cc.

References find_ext().

Referenced by ffmpegfs_getattr().

◆ check_ignore()

bool check_ignore	(	size_t	size,
		size_t	offset
	)

For use with win_smb_fix=1: Check if this an illegal access offset by Windows.

Parameters

[in]	size	- sizeof of the file
[in]	offset	- offset at which file is accessed

Returns: If request should be ignored, returns true; otherwise false

Definition at line 2054 of file ffmpeg_utils.cc.

◆ detect_docker()

bool detect_docker ( )

Detect if we are running under Docker.

Returns: Returns true, if running under Docker, or false if not.

Definition at line 2407 of file ffmpeg_utils.cc.

Referenced by main().

◆ exepath()

void exepath ( std::string * path )

Path to FFmpegfs binary.

Parameters

[in] path - Path to FFmpegfs binary.

Definition at line 1783 of file ffmpeg_utils.cc.

Referenced by prepare_script().

◆ expand_path()

const std::string & expand_path	(	std::string *	tgt,
		const std::string &	src
	)

Expand path, e.g., expand ~/ to home directory.

Parameters

[out]	tgt	- Expanded source path.
[in]	src	- Path to expand.

Returns: On success, returns expanded source path.

Definition at line 1874 of file ffmpeg_utils.cc.

Referenced by ffmpegfs_opt_proc(), main(), and transcoder_cache_path().

◆ ffmpeg_geterror()

std::string ffmpeg_geterror ( int errnum )

Get FFmpeg error string for errnum. Internally calls av_strerror().

Parameters

[in] errnum - FFmpeg error code.

Returns: Returns std::string with the error defined by errnum.

Definition at line 1137 of file ffmpeg_utils.cc.

◆ ffmpeg_libinfo() [1/2]

std::string ffmpeg_libinfo ( )

Get info about the FFmpeg libraries used.

Returns: std::tring with info about the linked FFmpeg libraries.

Definition at line 1235 of file ffmpeg_utils.cc.

◆ ffmpeg_libinfo() [2/2]

static std::string ffmpeg_libinfo	(	bool	lib_exists,
		__attribute__((unused)) unsigned int	version,
		__attribute__((unused)) const char *	cfg,
		int	version_minor,
		int	version_major,
		int	version_micro,
		const char *	libname
	)

static

Get FFmpeg library info.

Parameters

[in]	lib_exists	- Set to true if library exists.
[in]	version	- Library version number.
[in]	cfg	- Library configuration.
[in]	version_minor	- Library version minor.
[in]	version_major	- Library version major.
[in]	version_micro	- Library version micro.
[in]	libname	- Name of the library.

Returns: Formatted library information.

Definition at line 1213 of file ffmpeg_utils.cc.

References strsprintf().

◆ ffmpeg_rescale_q()

int64_t ffmpeg_rescale_q	(	int64_t	ts,
		const AVRational &	timebase_in,
		const AVRational &	timebase_out = `av_get_time_base_q()`
	)

Convert a FFmpeg time from in timebase to outtime base.

If out time base is omitted, returns standard AV_TIME_BASE fractional seconds Avoids conversion of AV_NOPTS_VALUE.

Parameters

[in]	ts	- Time in input timebase.
[in]	timebase_in	- Input timebase.
[in]	timebase_out	- Output timebase, defaults to AV_TIMEBASE if unset.

Returns: Returns converted value, or AV_NOPTS_VALUE if ts is AV_NOPTS_VALUE.

Definition at line 1151 of file ffmpeg_utils.cc.

◆ ffmpeg_rescale_q_rnd()

int64_t ffmpeg_rescale_q_rnd	(	int64_t	ts,
		const AVRational &	timebase_in,
		const AVRational &	timebase_out = `av_get_time_base_q()`
	)

Convert a FFmpeg time from in timebase to out timebase with rounding.

If out time base is omitted, returns standard AV_TIME_BASE fractional seconds Avoids conversion of AV_NOPTS_VALUE.

Parameters

[in]	ts	- Time in input timebase.
[in]	timebase_in	- Input timebase.
[in]	timebase_out	- Output timebase, defaults to AV_TIMEBASE if unset.

Returns: Returns converted value, or AV_NOPTS_VALUE if ts is AV_NOPTS_VALUE.

Definition at line 1166 of file ffmpeg_utils.cc.

References AV_ROUND_PASS_MINMAX.

Referenced by FFmpeg_Base::audio_info(), FFmpeg_Transcoder::create_audio_frame(), FFmpeg_Transcoder::decode_video_frame(), FFmpeg_Transcoder::open_output(), FFmpeg_Transcoder::store_packet(), and FFmpeg_Base::video_info().

◆ file_exists()

bool file_exists ( const std::string & filename )

Check if file exists.

Parameters

[in] filename - File to check.

Returns: Returns true if file exists, false if not.

Definition at line 2088 of file ffmpeg_utils.cc.

Referenced by Buffer::segment_exists().

◆ find_ext()

bool find_ext	(	std::string *	ext,
		const std::string &	filename
	)

Find extension in filename, if existing.

Parameters

[in]	ext	- Extension, if found.
[in]	filename	- Filename to inspect.

Returns: Returns true if extension was found, false if there was none

Definition at line 1058 of file ffmpeg_utils.cc.

Referenced by check_ext(), ffmpegfs_readdir(), find_original(), and virtual_name().

◆ format_bitrate()

std::string format_bitrate ( BITRATE value )

Format a bit rate.

Parameters

[in] value - Bit rate to format.

Returns: Returns std::string with formatted value in bit/s, kbit/s or Mbit/s. If value == AV_NOPTS_VALUE returns "unset".

Definition at line 1504 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::add_stream(), FFmpeg_Base::audio_info(), create_bluray_virtualfile(), create_dvd_virtualfile(), and FFmpeg_Base::video_info().

◆ format_duration()

std::string format_duration	(	int64_t	value,
		uint32_t	fracs = `3`
	)

Format a time in format HH:MM:SS.fract.

Parameters

[in]	value	- Time value in AV_TIME_BASE factional seconds.
[in]	fracs	- Fractional digits.

Returns: Returns std::string with formatted value. If value == AV_NOPTS_VALUE returns "unset".

Definition at line 1550 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Base::audio_info(), create_bluray_virtualfile(), create_cuesheet_virtualfile(), create_dvd_virtualfile(), create_vcd_virtualfile(), FFmpeg_Transcoder::decode_frame(), FFmpeg_Transcoder::decode_video_frame(), FFmpeg_Transcoder::store_packet(), and FFmpeg_Base::video_info().

◆ format_number()

std::string format_number ( int64_t value )

Format numeric value.

Parameters

[in] value - Value to format.

Returns: Returns std::string with formatted value; if value == AV_NOPTS_VALUE returns "unset"; "unlimited" if value == 0.

Definition at line 1488 of file ffmpeg_utils.cc.

◆ format_result_size()

std::string format_result_size	(	size_t	size_resulting,
		size_t	size_predicted
	)

Format size of transcoded file including difference between predicted and resulting size.

Parameters

[in]	size_resulting	- Resulting size.
[in]	size_predicted	- Predicted size.

Returns: Returns std::string with formatted value in bytes plus difference; if value == AV_NOPTS_VALUE returns "unset"; "unlimited" if value == 0.

Definition at line 1675 of file ffmpeg_utils.cc.

References format_size().

◆ format_result_size_ex()

std::string format_result_size_ex	(	size_t	size_resulting,
		size_t	size_predicted
	)

Format size of transcoded file including difference between predicted and resulting size.

Parameters

[in]	size_resulting	- Resulting size.
[in]	size_predicted	- Predicted size.

Returns: Returns std::string with formatted value in bytes plus KB, MB or TB and difference; if value == AV_NOPTS_VALUE returns "unset"; "unlimited" if value == 0.

Definition at line 1689 of file ffmpeg_utils.cc.

References format_size(), and strsprintf().

Referenced by transcode_finish().

◆ format_samplerate()

std::string format_samplerate ( int value )

Format a samplerate.

Parameters

[in] value - Sample rate to format.

Returns: Returns std::string with formatted value in Hz or kHz. If value == AV_NOPTS_VALUE returns "unset".

Definition at line 1528 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::add_stream(), FFmpeg_Base::audio_info(), create_bluray_virtualfile(), and FFmpeg_Transcoder::init_resampler().

◆ format_size()

std::string format_size ( uint64_t value )

Format size.

Parameters

[in] value - Size to format.

Returns: Returns std::string with formatted value in bytes, KB, MB or TB; if value == AV_NOPTS_VALUE returns "unset"; "unlimited" if value == 0.

Definition at line 1630 of file ffmpeg_utils.cc.

Referenced by create_bluray_virtualfile(), create_dvd_virtualfile(), format_result_size(), format_result_size_ex(), Buffer::map_file(), and transcode().

◆ format_size_ex()

std::string format_size_ex ( uint64_t value )

Format size.

Parameters

[in] value - Size to format.

Returns: Returns std::string with formatted value in bytes plus KB, MB or TB; if value == AV_NOPTS_VALUE returns "unset"; "unlimited" if value == 0.

Definition at line 1669 of file ffmpeg_utils.cc.

Referenced by transcode_finish(), transcoder_predict_filesize(), and transcoder_set_filesize().

◆ format_time()

std::string format_time ( time_t value )

Format a time in format "w d m s".

Parameters

[in] value - Time value in AV_TIME_BASE factional seconds.

Returns: Returns std::string with formatted value. If value == AV_NOPTS_VALUE returns "unset".

Definition at line 1577 of file ffmpeg_utils.cc.

Referenced by start_timer(), and transcode().

◆ fourcc_make_string()

std::string fourcc_make_string	(	std::string *	buf,
		uint32_t	fourcc
	)

Fill the provided buffer with a string containing a FourCC (four-character code) representation.

Parameters

[in]	buf	- Upon return, filled in with the FourCC representation.
[in]	fourcc	- The fourcc to represent

Returns: The buffer in input.

Definition at line 1774 of file ffmpeg_utils.cc.

◆ get_audio_props()

int get_audio_props	(	AVFormatContext *	format_ctx,
		int *	channels,
		int *	samplerate
	)

Get first audio stream.

Parameters

[in]	format_ctx	- Format context of file
[out]	channels	- Number of audio channels in stream
[out]	samplerate	- Audio sample rate of stream

Returns: Returns stream number (value greater or equal zero) or negative errno value

Definition at line 2456 of file ffmpeg_utils.cc.

Referenced by parse_file().

◆ get_codec_name()

const char * get_codec_name	(	AVCodecID	codec_id,
		bool	long_name = `false`
	)

Safe way to get the codec name. Function never fails, will return "unknown" on error.

Parameters

[in]	codec_id	- ID of codec
[in]	long_name	- If true, gets the long name.

Returns: Returns the codec name or "unknown" on error.

Definition at line 1353 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::add_albumart_stream(), FFmpeg_Transcoder::add_subtitle_stream(), FFmpeg_Base::audio_info(), FFmpeg_Transcoder::calculate_predicted_filesize(), FFmpeg_Transcoder::open_bestmatch_video(), FFmpeg_Transcoder::open_decoder(), FFmpeg_Base::subtitle_info(), transcoder_set_filesize(), and FFmpeg_Base::video_info().

◆ get_disk_free()

size_t get_disk_free ( std::string & path )

Get free disk space.

Parameters

[in] path - Path or file on disk.

Returns: Returns the free disk space.

Definition at line 2042 of file ffmpeg_utils.cc.

◆ get_encoding()

int get_encoding	(	const char *	str,
		std::string &	encoding
	)

Try to detect the encoding of str. This is relatively realiable, but may be wrong.

Parameters

[in]	str	- Text string to be checked.
[out]	encoding	- Detected encoding.

Returns: Returns 0 if successful, or CHARDET_OUT_OF_MEMORY/CHARDET_MEM_ALLOCATED_FAIL on error.

Definition at line 2157 of file ffmpeg_utils.cc.

◆ get_filetype()

FILETYPE get_filetype ( const std::string & desttype )

Get the FFmpegfs filetype, desttype must be one of FFmpeg's "official" short names for formats.

Parameters

[in] desttype - Destination type (MP4, WEBM etc.).

Returns: On success, returns FILETYPE enum; On error, returns FILETYPE::UNKNOWN.

Definition at line 1441 of file ffmpeg_utils.cc.

References filetype_map.

Referenced by FFmpegfs_Format::init().

◆ get_filetype_from_list()

FILETYPE get_filetype_from_list ( const std::string & desttypelist )

Get the FFmpegfs filetype, desttypelist must be a comma separated list of FFmpeg's "official" short names for formats. Will return the first match. Same as get_filetype, but accepts a comma separated list.

Parameters

[in] desttypelist - Destination type list (MP4, WEBM etc.) separated by commas.

Returns: On success, returns FILETYPE enum; On error, returns FILETYPE::UNKNOWN.

Definition at line 1465 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::open_input_file().

◆ get_filetype_text()

std::string get_filetype_text ( FILETYPE filetype )

Convert FILETYPE enum to human readable text.

Parameters

[in] filetype - FILETYPE enum value to convert.

Returns: FILETYPE enum as text or "INVALID" if not known.

Definition at line 1454 of file ffmpeg_utils.cc.

Referenced by transcoder_set_filesize().

◆ get_media_type_string()

const char * get_media_type_string ( enum AVMediaType media_type )

av_get_media_type_string is missing, so we provide our own.

Parameters

[in] media_type - Media type to map.

Returns: Pointer to media type string.

Definition at line 1182 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::add_albumart_stream(), FFmpeg_Transcoder::add_subtitle_stream(), FFmpeg_Transcoder::open_bestmatch_decoder(), and FFmpeg_Transcoder::open_decoder().

◆ hwdevice_get_type_name()

const char * hwdevice_get_type_name ( AVHWDeviceType dev_type )

Save version of hwdevice_get_type_name: Get the string name of an AVHWDeviceType.

Parameters

[in] dev_type - Type from enum AVHWDeviceType.

Returns: Pointer to a static string containing the name, or "unknown" if the type is not valid.

Definition at line 2107 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::get_hw_pix_fmt(), and FFmpeg_Transcoder::hwdevice_ctx_create().

◆ init_id3v1()

void init_id3v1 ( ID3v1 * id3v1 )

Initialise ID3v1 tag.

Definition at line 1478 of file ffmpeg_utils.cc.

Referenced by Cache_Entry::clear(), and FFmpeg_Transcoder::FFmpeg_Transcoder().

◆ is_album_art()

bool is_album_art	(	AVCodecID	codec_id,
		const AVRational *	frame_rate = `nullptr`
	)

Minimal check if codec is an album art. Requires frame_rate to decide whether this is a video stream if codec_id is not BMP or PNG (which means its undoubtedly an album art). For MJPEG this may also be a video stream if the frame rate is high enough.

Parameters

[in]	codec_id	- ID of codec.
[in]	frame_rate	- Video frame rate, if known.

Returns: Returns true if codec is for an image; false if not.

Definition at line 2008 of file ffmpeg_utils.cc.

Referenced by guess_format_idx(), FFmpeg_Transcoder::is_video(), FFmpeg_Transcoder::open_albumarts(), and parse_file().

◆ is_blocked()

bool is_blocked ( const std::string & filename )

Check if filename should be hidden from output path.

Parameters

[in] filename - Name to check

Returns: Returns true, if filename is blocked, false if not.

Definition at line 2503 of file ffmpeg_utils.cc.

Referenced by ffmpegfs_getattr(), and ffmpegfs_readdir().

◆ is_device()

static int is_device ( __attribute__((unused)) const AVClass * avclass )

static

Check if class is a FMmpeg device.

Todo:: Currently always returns 0. Must implement real check.

Parameters

[in] avclass - Private class object

Returns: Returns 1 if object is a device, 0 if not.

Definition at line 1260 of file ffmpeg_utils.cc.

◆ is_mount()

int is_mount ( const std::string & path )

Check if path is a mount.

Parameters

[in] path - Path to check.

Returns: Returns 1 if path is a mount point; 0 if not. On error, returns -1. Check errorno for details.

Definition at line 1890 of file ffmpeg_utils.cc.

References new_strdup().

Referenced by ffmpegfs_opt_proc().

◆ is_selected()

bool is_selected ( const std::string & ext )

Find extension in include list, if existing.

Parameters

[in] ext - Extension, if found.

Returns: Returns true if extension was found, false if there was none

Definition at line 2490 of file ffmpeg_utils.cc.

Referenced by virtual_name().

◆ is_text_codec()

bool is_text_codec ( AVCodecID codec_id )

Check if subtitle codec is a text or graphical codec.

Parameters

[in] codec_id - Codec to check, must be one of the subtitle codecs.

Returns: Returns true if codec_id is a text based codec, false if it is bitmap based.

Definition at line 2424 of file ffmpeg_utils.cc.

Referenced by Format_Options::subtitle_codec().

◆ ltrim()

std::string & ltrim ( std::string & s )

trim from start

Parameters

[in] s - String to trim.

Returns: Reference to string s.

Definition at line 1798 of file ffmpeg_utils.cc.

◆ make_filename()

std::string make_filename	(	uint32_t	file_no,
		const std::string &	fileext
	)

Make a file name from file number and file extension.

Parameters

[in]	file_no	- File number 1...n
[in]	fileext	- Extension of file (e.g mp4, webm)

Returns: Returns the file name.

Definition at line 2082 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::encode_finish(), ffmpegfs_getattr(), ffmpegfs_readdir(), Buffer::init(), and make_hls_fileset().

◆ make_lower()

void make_lower ( std::string * input )

Convert string to lower case.

Parameters

[in,out] input String to convert

Definition at line 2100 of file ffmpeg_utils.cc.

◆ make_upper()

void make_upper ( std::string * input )

Convert string to upper case.

Parameters

[in,out] input String to convert

Definition at line 2093 of file ffmpeg_utils.cc.

◆ mktree()

int mktree	(	const std::string &	path,
		mode_t	mode
	)

Make directory tree.

Parameters

[in]	path	- Path to create
[in]	mode	- Directory mode, see mkdir() function.

Returns: On success, returns 0; on error, returns non-zero errno value.

Definition at line 1376 of file ffmpeg_utils.cc.

Referenced by Buffer::init(), and Cache::load_index().

◆ mssleep()

void mssleep ( int milliseconds )

Sleep for specified time.

Parameters

milliseconds - Milliseconds to sleep

Definition at line 2535 of file ffmpeg_utils.cc.

Referenced by transcode(), transcode_until(), and transcoder_read_frame().

◆ new_strdup()

std::shared_ptr< char[]> new_strdup ( const std::string & str )

strdup() variant taking a std::string as input.

Parameters

[in] str - String to duplicate.

Returns: Copy of the input string. Remember to delete the allocated memory.

Definition at line 1121 of file ffmpeg_utils.cc.

Referenced by Buffer::init(), is_mount(), remove_filename(), and remove_path().

◆ nocasecompare()

int nocasecompare	(	const std::string &	lhs,
		const std::string &	rhs
	)

nocasecompare to make std::string find operations case insensitive

Parameters

[in]	lhs	- left hand string
[in]	rhs	- right hand string

Returns: -1 if lhs < rhs; 0 if lhs == rhs and 1 if lhs > rhs

Definition at line 2037 of file ffmpeg_utils.cc.

Referenced by comp::operator()().

◆ nssleep()

void nssleep ( int nanoseconds )

Sleep for specified time.

Parameters

nanoseconds - Nanoseconds to sleep

Definition at line 2545 of file ffmpeg_utils.cc.

◆ print_fps()

static void print_fps	(	double	d,
		const char *	postfix
	)

static

Print frames per second.

Parameters

[in]	d	- Frames per second.
[in]	postfix	- Postfix text.

Definition at line 1710 of file ffmpeg_utils.cc.

◆ print_stream_info()

int print_stream_info ( const AVStream * stream )

Print info about an AVStream.

Parameters

[in] stream - Stream to print.

Returns: On success, returns 0; on error, a negative AVERROR value.

Definition at line 1731 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::add_stream_copy().

◆ read_file()

int read_file	(	const std::string &	path,
		std::string &	result
	)

Read text file and return in UTF-8 format, no matter in which encoding the input file is. UTF-8/16/32 with BOM will always return a correct result. For all other encodings the function tries to detect it, that may fail.

Parameters

[in]	path	- Path and filename of input file
[out]	result	- File contents as UTF-8

Returns: Returns one of the ENCODING enum values on success, which are always negative; or errno on error. Basically a return code > 0 means there is an error.

Definition at line 2199 of file ffmpeg_utils.cc.

Referenced by parse_cuesheet_file().

◆ reg_compare()

int reg_compare	(	const std::string &	value,
		const std::string &	pattern,
		std::regex::flag_type	flag = `std::regex::ECMAScript`
	)

Compare value with pattern.

Parameters

[in]	value	- Value to check.
[in]	pattern	- Regexp pattern to match.
[in]	flag	- On of the flag_type constants, see https://en.cppreference.com/w/cpp/regex/basic_regex for options. Mostly std::regex::icase is used to make matches case insensitive.

Returns: Returns 0 if pattern matches; 1 if not; -1 if pattern is no valid regex

Definition at line 1852 of file ffmpeg_utils.cc.

Referenced by get_bitrate(), get_samplerate(), get_size(), and get_time().

◆ regex_escape()

const std::string & regex_escape ( std::string * str )

Escape characters that are meaningful to regexp.

Parameters

[in] str - String to escape

Returns: Returns reference to string.

Definition at line 2474 of file ffmpeg_utils.cc.

Referenced by FFmpeg_Transcoder::add_external_subtitle_streams().

◆ remove_ext()

const std::string & remove_ext ( std::string * filepath )

Remove extension from filename.

Parameters

[in] filepath - Filename to remove path from.

Returns: Returns constant reference to filename.

Definition at line 1043 of file ffmpeg_utils.cc.

Referenced by ffmpegfs_getattr(), and find_original().

◆ remove_filename()

const std::string & remove_filename ( std::string * filepath )

Remove filename from path. Handy dirname alternative.

Parameters

[in] filepath - Path to remove filename from.

Returns: Returns constant reference to path.

Definition at line 1012 of file ffmpeg_utils.cc.

References append_sep(), and new_strdup().

Referenced by ffmpegfs_getattr(), find_original(), find_parent(), VCDUTILS::get_directory(), load_path(), parse_cuesheet(), and FileIO::set_virtualfile().

◆ remove_path()

const std::string & remove_path ( std::string * filepath )

Remove path from filename. Handy basename alternative.

Parameters

[in] filepath - Filename to remove path from.

Returns: Returns constant reference to filename.

Definition at line 1028 of file ffmpeg_utils.cc.

References new_strdup().

Referenced by check_cuesheet(), find_original(), get_number(), load_path(), and parse_cuesheet().

◆ remove_sep()

const std::string & remove_sep ( std::string * path )

Remove / from the path.

Parameters

[in] path - Path to remove separator from.

Returns: Returns constant reference to path.

Definition at line 1002 of file ffmpeg_utils.cc.

Referenced by find_parent(), load_path(), and make_hls_fileset().

◆ replace_all() [1/2]

std::string replace_all	(	std::string *	str,
		const std::string &	from,
		const std::string &	to = `""`
	)

Same as std::string replace(), but replaces string in-place.

Parameters

[in,out]	str	- Source string.
[in]	from	- String to replace.
[in]	to	- Replacement string.

Returns: Source string with all occurrences of from replaced with to.

Definition at line 1820 of file ffmpeg_utils.cc.

◆ replace_all() [2/2]

std::string replace_all	(	std::string	str,
		const std::string &	from,
		const std::string &	to
	)

Same as std::string replace(), but replaces all occurrences.

Parameters

[in,out]	str	- Source string.
[in]	from	- String to replace.
[in]	to	- Replacement string.

Returns: Source string with all occurrences of from replaced with to.

Definition at line 1815 of file ffmpeg_utils.cc.

Referenced by create_bluray_virtualfile(), create_cuesheet_virtualfile(), create_dvd_virtualfile(), create_vcd_virtualfile(), and parse_file().

◆ replace_ext()

const std::string & replace_ext	(	std::string *	filepath,
		const std::string &	ext
	)

Replace extension in filename, taking into account that there might not be an extension already.

Parameters

[in]	filepath	- Filename to replace extension.
[in]	ext	- Extension to replace.

Returns: Returns constant reference to filename.

Definition at line 1084 of file ffmpeg_utils.cc.

Referenced by check_cuesheet(), and virtual_name().

◆ replace_start()

bool replace_start	(	std::string *	str,
		const std::string &	from,
		const std::string &	to = `""`
	)

Replace start of string from "from" to "to".

Parameters

[in,out]	str	- Source string.
[in]	from	- String to replace.
[in]	to	- Replacement string.

Returns: True if from has been replaced, false if not.

Definition at line 1831 of file ffmpeg_utils.cc.

Referenced by insert_file(), and Logging::Logger::~Logger().

◆ rtrim()

std::string & rtrim ( std::string & s )

trim from end

Parameters

[in] s - String to trim.

Returns: Reference to string s.

Definition at line 1804 of file ffmpeg_utils.cc.

◆ sanitise_filepath() [1/2]

std::string sanitise_filepath ( const std::string & filepath )

Sanitise file name. Calls realpath() to remove duplicate // or resolve ../.. etc.

Parameters

[in] filepath - File name and path to sanitise.

Returns: Returns sanitised file name and path.

Definition at line 1990 of file ffmpeg_utils.cc.

◆ sanitise_filepath() [2/2]

std::string sanitise_filepath ( std::string * filepath )

Sanitise file name. Calls realpath() to remove duplicate // or resolve ../.. etc. Changes the path in place.

Parameters

[in] filepath - File name and path to sanitise.

Returns: Returns sanitised file name and path.

Definition at line 1973 of file ffmpeg_utils.cc.

Referenced by ffmpegfs_opt_proc(), find_file(), find_file_from_orig(), find_original(), and insert_file().

◆ save_free()

void save_free ( void ** p )

Savely free memory: Pointer will be set to nullptr before it is actually freed.

Parameters

[in,out] p - Pointer to delete

Definition at line 2526 of file ffmpeg_utils.cc.

◆ show_caps()

int show_caps ( int device_only )

Lists all supported codecs and devices.

Parameters

[in] device_only - If true lists devices only.

Returns: On success, returns 0; on error, a negative AVERROR value.

Definition at line 1269 of file ffmpeg_utils.cc.

◆ split()

std::vector< std::string > split	(	const std::string &	input,
		const std::string &	regex
	)

Split string into an array delimited by a regular expression.

Parameters

[in]	input	- Input string.
[in]	regex	- Regular expression to match.

Returns: Returns an array with separate elements.

Definition at line 1964 of file ffmpeg_utils.cc.

Referenced by get_desttype(), and get_value().

◆ stat_set_size()

void stat_set_size	(	struct stat *	st,
		size_t	size
	)

Properly fill in all size related members in stat struct.

Parameters

[in,out]	st	stat structure to update
[in]	size	size value to copy

Definition at line 2397 of file ffmpeg_utils.cc.

Referenced by create_cuesheet_virtualfile(), FFmpeg_Transcoder::encode_finish(), ffmpegfs_fgetattr(), ffmpegfs_getattr(), init_stat(), load_path(), transcoder_cached_filesize(), and transcoder_read_frame().

◆ strcasecmp()

int strcasecmp	(	const std::string &	s1,
		const std::string &	s2
	)

strcasecmp() equivalent for std::string.

Parameters

[in]	s1	- std:string #1
[in]	s2	- std:string #2

Returns: Returns same as strcasecmp() for char *.

Definition at line 1847 of file ffmpeg_utils.cc.

Referenced by append_ext(), FFmpeg_Transcoder::copy_metadata(), and find_original().

◆ supports_albumart()

int supports_albumart ( FILETYPE filetype )

Check if file type supports album arts.

Parameters

[in] filetype - File type: MP3, MP4 etc.

Returns: Returns true if album arts are supported, false if not.

Definition at line 1435 of file ffmpeg_utils.cc.

◆ tempdir()

void tempdir ( std::string & path )

Get temporary directory.

Parameters

[out] path - Path to temporary directory.

Definition at line 1415 of file ffmpeg_utils.cc.

◆ to_utf8()

int to_utf8	(	std::string &	text,
		const std::string &	encoding
	)

Convert almost any encoding to UTF-8. To get a list of all possible encodings run "iconv --list".

Parameters

[in]	text	- Text to be converted
[in]	encoding	- Encoding of input text.

Returns: Returns 0 if successful and the converted text, or errno value On error, and text is unchanged.

Definition at line 2113 of file ffmpeg_utils.cc.

◆ trim()

std::string & trim ( std::string & s )

trim from both ends

Parameters

[in] s - String to trim.

Returns: Reference to string s.

Definition at line 1810 of file ffmpeg_utils.cc.

Referenced by VCDUTILS::convert_txt2string(), and Logging::Logger::~Logger().

◆ ussleep()

void ussleep ( int microseconds )

Sleep for specified time.

Parameters

microseconds - Microseconds to sleep

Definition at line 2540 of file ffmpeg_utils.cc.

Variable Documentation

◆ filetype_map

const FILETYPE_MAP filetype_map

static

Initial value:

=
{
    { "mp3",    FILETYPE::MP3 },
    { "mp4",    FILETYPE::MP4 },
    { "wav",    FILETYPE::WAV },
    { "ogg",    FILETYPE::OGG },
    { "webm",   FILETYPE::WEBM },
    { "mov",    FILETYPE::MOV },
    { "aiff",   FILETYPE::AIFF },
    { "opus",   FILETYPE::OPUS },
    { "prores", FILETYPE::PRORES },
    { "alac",   FILETYPE::ALAC },
    { "png",    FILETYPE::PNG },
    { "jpg",    FILETYPE::JPG },
    { "bmp",    FILETYPE::BMP },
    { "ts",     FILETYPE::TS },
    { "hls",    FILETYPE::HLS },
    { "flac",   FILETYPE::FLAC },
    { "mkv",    FILETYPE::MKV },
}

List of supported file types

Definition at line 103 of file ffmpeg_utils.cc.

Referenced by get_filetype().

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ AV_ERROR_MAX_STRING_SIZE

◆ PRINT_LIB_INFO

◆ STR_VALUE

◆ X

Typedef Documentation

◆ FILETYPE_MAP

Function Documentation

◆ append_basepath()

◆ append_ext()

◆ append_filename()

◆ append_sep()

◆ check_ext()

◆ check_ignore()

◆ detect_docker()

◆ exepath()

◆ expand_path()

◆ ffmpeg_geterror()

◆ ffmpeg_libinfo() [1/2]

◆ ffmpeg_libinfo() [2/2]

◆ ffmpeg_rescale_q()

◆ ffmpeg_rescale_q_rnd()

◆ file_exists()

◆ find_ext()

◆ format_bitrate()

◆ format_duration()

◆ format_number()

◆ format_result_size()

◆ format_result_size_ex()

◆ format_samplerate()

◆ format_size()

◆ format_size_ex()

◆ format_time()

◆ fourcc_make_string()

◆ get_audio_props()

◆ get_codec_name()

◆ get_disk_free()

◆ get_encoding()

◆ get_filetype()

◆ get_filetype_from_list()

◆ get_filetype_text()

◆ get_media_type_string()

◆ hwdevice_get_type_name()

◆ init_id3v1()

◆ is_album_art()

◆ is_blocked()

◆ is_device()

◆ is_mount()

◆ is_selected()

◆ is_text_codec()

◆ ltrim()

◆ make_filename()

◆ make_lower()

◆ make_upper()

◆ mktree()

◆ mssleep()

◆ new_strdup()

◆ nocasecompare()

◆ nssleep()

◆ print_fps()

◆ print_stream_info()

◆ read_file()

◆ reg_compare()

◆ regex_escape()

◆ remove_ext()

◆ remove_filename()

◆ remove_path()

◆ remove_sep()

◆ replace_all() [1/2]

◆ replace_all() [2/2]

◆ replace_ext()

◆ replace_start()

◆ rtrim()

◆ sanitise_filepath() [1/2]

◆ sanitise_filepath() [2/2]