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cleanup: api misc

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bnnm 2024-07-27 14:42:43 +02:00
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2
cli/api_example.c
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#include "../src/api.h"
#include "../src/libvgmstream.h"
#if LIBVGMSTREAM_ENABLE
#include <stdlib.h>
#include <stdio.h>

55
src/api.h
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#ifndef _API_H_
#define _API_H_
#include "base/plugins.h" //TODO: to be removed
//#define LIBVGMSTREAM_ENABLE 1
#if LIBVGMSTREAM_ENABLE
/* vgmstream's public API
*
* By default vgmstream behaves like a simple decoder (extract samples until stream end), but you can configure it
* to loop N times or even downmix. In other words, it also behaves a bit like a player.
*
* It exposes multiple options and convenience functions beyond simple decoding mainly for various plugins,
* since it was faster moving shared behavior to core rather than reimplementing every time.
*
* All this may make the API a bit twisted and coupled (sorry, tried my best), probably will improve later. Probably.
*
* Notes:
* - vgmstream may dynamically allocate stuff as needed (not too much beyond some setup buffers, but varies per format)
* - previously the only way to use vgmstream was accesing its internals. Now there is an API internals may change in the future
* - some details described in the API may not happen at the moment (they are defined for future internal changes)
* - main reason it uses the slighly long-winded libvgmstream_* names is that internals use the vgmstream_* 'namespace'
* - c-strings should be in UTF-8
* - the API is still WIP and may be slightly buggy overall due to lack of time, to be improved later
* - vgmstream's features are mostly stable, but this API may be tweaked from time to time (check API_VERSION)
*
* Basic usage (also see api_example.c):
* - libvgmstream_init(...) // base context
* - libvgmstream_setup(...) // config if needed
* - libvgmstream_open(...) // setup format
* - libvgmstream_play(...) // main decode
* - output samples + repeat libvgmstream_play until stream is done
* - libvgmstream_free(...) // cleanup
*/
#include <stdint.h>
#include <stdbool.h>
/* standard C param call and name mangling (to avoid __stdcall / .defs) */
//#define LIBVGMSTREAM_CALL __cdecl //needed?
//LIBVGMSTREAM_API (type) LIBVGMSTREAM_CALL libvgmstream_function(...);
/* define external function behavior (during compilation) */
#if defined(LIBVGMSTREAM_EXPORT)
#define LIBVGMSTREAM_API __declspec(dllexport) /* when exporting/creating vgmstream DLL */
#elif defined(LIBVGMSTREAM_IMPORT)
#define LIBVGMSTREAM_API __declspec(dllimport) /* when importing/linking vgmstream DLL */
#else
#define LIBVGMSTREAM_API /* nothing, internal/default */
#endif
#include "api_version.h"
#include "api_decode.h"
#include "api_helpers.h"
#include "api_streamfile.h"
#include "api_tags.h"
#endif
#endif

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src/api_decode.h
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#ifndef _API_DECODE_H_
#define _API_DECODE_H_
#include "api.h"
#if LIBVGMSTREAM_ENABLE
#include "api_streamfile.h"
/* vgmstream's main (decode) API.
*/
/* interleaved samples: buf[0]=ch0, buf[1]=ch1, buf[2]=ch0, buf[3]=ch0, ... */
typedef enum {
LIBVGMSTREAM_SAMPLE_PCM16 = 0x01,
LIBVGMSTREAM_SAMPLE_PCM24 = 0x02,
LIBVGMSTREAM_SAMPLE_PCM32 = 0x03,
LIBVGMSTREAM_SAMPLE_FLOAT = 0x04,
} libvgmstream_sample_t;
/* current song info, may be copied around (values are info-only) */
typedef struct {
/* main (always set) */
libvgmstream_sample_t sample_type; // output buffer's sample type
int channels; // output channels
int sample_rate; // output sample rate
int sample_size; // derived from sample_type (pcm16=2, float=4, etc)
/* extra info (may be 0 if not known or not relevant) */
uint32_t channel_layout; // standard WAVE bitflags
int subsong_index; // 0 = none, N = loaded subsong N
int subsong_count; // 0 = format has no concept of subsongs, N = has N subsongs (1 = format has subsongs, and only 1)
int input_channels; // original file's channels before downmixing (if any)
//int interleave; // when file is interleaved
//int interleave_first; // when file is interleaved
//int interleave_last; // when file is interleaved
//int frame_size; // when file has some configurable frame size
/* sample info (may not be used depending on config) */
int64_t sample_count; // file's max samples (not final play duration)
int64_t loop_start; // loop start sample
int64_t loop_end; // loop end sample
bool loop_flag; // if file loops; note that false + defined loops means looping was forcefully disabled
bool play_forever; // if file loops forever based on current config (meaning _play never stops)
int64_t play_samples; // totals after all calculations (after applying loop/fade/etc config)
// ** may not be 100% accurate in some cases (must check decoder's 'done' flag rather than this count)
// ** if play_forever is set this is still provided for reference based on non-forever config
int stream_bitrate; // average bitrate of the subsong (slightly bloated vs codec_bitrate; incorrect in rare cases)
//int codec_bitrate; // average bitrate of the codec data
// ** not possible / slow to calculate in most cases
/* descriptions */
char codec_name[128]; //
char layout_name[128]; //
char meta_name[128]; // (not internal "tag" metadata)
char stream_name[256]; // some internal name or representation, not always useful
// ** these are a bit big for a struct, but the typical use case of vgsmtream is opening a file > immediately
// query description and since libvgmstream returns its own copy it shouldn't be too much of a problem
// ** (may be separated later)
/* misc */
//bool rough_samples; // signal cases where loop points or sample count can't exactly reflect actual behavior (do not use to export)
int format_internal_id; // may be used when reopening subfiles or similar formats without checking other possible formats first
// ** this value WILL change without warning between vgmstream versions/commits
} libvgmstream_format_t;
typedef struct {
void* buf; // current decoded buf (valid after _decode until next call; may change between calls)
int buf_samples; // current buffer samples (0 is possible in some cases, meaning current _decode can't generate samples)
int buf_bytes; // current buffer bytes (channels * sample_size * samples)
bool done; // flag when stream is done playing based on config; will still allow _play calls returning blank samples
// ** note that with play_forever this flag is never set
} libvgmstream_decoder_t;
/* vgmstream context/handle */
typedef struct {
void* priv; // internal data
/* pointers for easier ABI compatibility */
const libvgmstream_format_t* format; // current song info, updated on _open
libvgmstream_decoder_t* decoder; // updated on each _decode call
} libvgmstream_t;
/* inits the vgmstream context
* - returns NULL on error
* - call libvgmstream_free when done.
*/
LIBVGMSTREAM_API libvgmstream_t* libvgmstream_init(void);
/* frees vgmstream context and any other internal stuff that may not be closed
*/
LIBVGMSTREAM_API void libvgmstream_free(libvgmstream_t* lib);
/* configures how vgmstream behaves internally when playing a file */
typedef struct {
bool disable_config_override; // ignore forced (TXTP) config
bool allow_play_forever; // must allow manually as some cases a TXTP may set loop forever but client may not handle it (ex. wave dumpers)
bool play_forever; // keeps looping forever (file must have loop_flag set)
bool ignore_loop; // ignores loops points
bool force_loop; // enables full loops (0..samples) if file doesn't have loop points
bool really_force_loop; // forces full loops (0..samples) even if file has loop points
bool ignore_fade; // don't fade after N loops and play remaning stream (for files with outros)
double loop_count; // target loops (values like 1.5 are ok)
double fade_time; // fade period after target loops
double fade_delay; // fade delay after target loops
int auto_downmix_channels; // downmixing if vgmstream's channels are higher than value
// ** for players that can only handle N channels, but this type of downmixing is very simplistic and not recommended
bool force_pcm16; // forces output buffer to be remixed into PCM16
} libvgmstream_config_t;
/* pass default config, that will be applied to song on open
* - invalid config or complex cases (ex. some TXTP) may ignore these settings.
* - called without a song loaded (before _open or after _close), otherwise ignored.
* - without config vgmstream will decode the current stream once
*/
LIBVGMSTREAM_API void libvgmstream_setup(libvgmstream_t* lib, libvgmstream_config_t* cfg);
/* configures how vgmstream opens the format */
typedef struct {
libvgmstream_streamfile_t* libsf; // custom IO streamfile that provides reader info for vgmstream
// ** not needed after _open and should be closed, as vgmstream re-opens its own SFs internally as needed
int subsong; // target subsong (1..N) or 0 = default/first
// ** to check if a file has subsongs, _open first + check format->total_subsongs (then _open 2nd, 3rd, etc)
int format_internal_id; // force a format (for example when loading new subsong of the same archive)
int stereo_track; // forces vgmstream to decode one 2ch+2ch+2ch... 'track' and discard other channels, where 0 = disabled, 1..N = Nth track
} libvgmstream_options_t;
/* opens file based on config and prepares it to play if supported.
* - returns < 0 on error (file not recognised, invalid subsong index, etc)
* - will close currently loaded song if needed
*/
LIBVGMSTREAM_API int libvgmstream_open(libvgmstream_t* lib, libvgmstream_options_t* open_options);
#if 0
/* opens file based on config and returns its file info
* - returns < 0 on error (file not recognised, invalid subsong index, etc)
* - equivalent to _open, but doesn't update the current loaded song / format and copies to passed struct
* - may be used while current song is loaded/playing but you need to query next song with current config
* - to play a new song don't call _open_info to check the format first, just call _open + check format afterwards
* - in many cases the only way for vgmstream to get a file's format info is making it almost ready to play,
* so this isn't any faster than _open
*/
LIBVGMSTREAM_API int libvgmstream_open_info(libvgmstream_t* lib, libvgmstream_options_t* options, libvgmstream_format_t* format);
#endif
/* closes current song; may still use libvgmstream to open other songs
*/
LIBVGMSTREAM_API void libvgmstream_close(libvgmstream_t* lib);
/* decodes next batch of samples
* - vgmstream supplies its own buffer, updated on lib->decoder->* values (may change between calls)
* - returns < 0 on error
*/
LIBVGMSTREAM_API int libvgmstream_play(libvgmstream_t* lib);
/* Same as _play, but fills some external buffer (also updates lib->decoder->* values)
* - returns < 0 on error, or N = number of filled samples.
* - buf must be at least as big as channels * sample_size * buf_samples
* - needs copying around from internal bufs so may be slightly slower; mainly for cases when you have buf constraints
*/
LIBVGMSTREAM_API int libvgmstream_fill(libvgmstream_t* lib, void* buf, int buf_samples);
/* Gets current position within the song.
* - return < 0 on error (file not ready)
*/
LIBVGMSTREAM_API int64_t libvgmstream_get_play_position(libvgmstream_t* lib);
/* Seeks to absolute position. Will clamp incorrect values such as seeking before/past playable length.
* - on play_forever may seek to any position
*/
LIBVGMSTREAM_API void libvgmstream_seek(libvgmstream_t* lib, int64_t sample);
/* Reset current song
*/
LIBVGMSTREAM_API void libvgmstream_reset(libvgmstream_t* lib);
#endif
#endif

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src/api_helpers.h
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#ifndef _API_HELPERS_H_
#define _API_HELPERS_H_
#include "api.h"
#if LIBVGMSTREAM_ENABLE
/* vgmstream's helper stuff, for plugins.
*/
typedef enum {
LIBVGMSTREAM_LOG_LEVEL_ALL = 0,
LIBVGMSTREAM_LOG_LEVEL_DEBUG = 20,
LIBVGMSTREAM_LOG_LEVEL_INFO = 30,
LIBVGMSTREAM_LOG_LEVEL_NONE = 100,
} libvgmstream_loglevel_t;
typedef struct {
libvgmstream_loglevel_t level; // log level
void (*callback)(int level, const char* str); // log callback
bool stdout_callback; // use default log callback rather than user supplied
} libvgmstream_log_t;
/* defines a global log callback, as vgmstream sometimes communicates format issues to the user.
* - note that log is currently set globally rather than per libvgmstream_t
*/
LIBVGMSTREAM_API void libvgmstream_set_log(libvgmstream_log_t* cfg);
/* Returns a list of supported extensions (WARNING: it's pretty big), such as "adx", "dsp", etc.
* Mainly for plugins that want to know which extensions are supported.
* - returns NULL if no size is provided
*/
LIBVGMSTREAM_API const char** libvgmstream_get_extensions(size_t* size);
/* Same as above, buf returns a list what vgmstream considers "common" formats (such as "wav", "ogg"),
* which usually one doesn't want to associate to vgmstream.
* - returns NULL if no size is provided
*/
LIBVGMSTREAM_API const char** libvgmstream_get_common_extensions(size_t* size);
typedef struct {
bool is_extension; /* set if filename is just an extension */
bool skip_default; /* set if shouldn't check default formats */
bool reject_extensionless; /* set if player can't play extensionless files */
bool accept_unknown; /* set to allow any extension (for txth) */
bool accept_common; /* set to allow known-but-common extension (when player has plugin priority) */
} libvgmstream_valid_t;
/* returns if vgmstream can parse a filename by extension, to reject some files earlier
* - doesn't check file contents (that's only done on _open)
* - config may be NULL
* - mainly for plugins that fail early; libvgmstream doesn't use this
*/
LIBVGMSTREAM_API bool libvgmstream_is_valid(const char* filename, libvgmstream_valid_t* cfg);
typedef struct {
bool force_title; // TODO: what was this for?
bool subsong_range; // print a range of possible subsongs after title 'filename#1~N'
bool remove_extension; // remove extension from passed filename
bool remove_archive; // remove '(archive)|(subfile)' format of some plugins
const char* filename; // base file's filename
// ** note that sometimes vgmstream doesn't have/know the original name, so it's needed again here
} libvgmstream_title_t;
/* get a simple title for plugins, derived from internal stream name if available
* - valid after _open
*/
LIBVGMSTREAM_API int libvgmstream_get_title(libvgmstream_t* lib, libvgmstream_title_t* cfg, char* buf, int buf_len);
/* Writes a description of the current song into dst. Will always be null-terminated.
* - returns < 0 if file was truncated, though will still succeed.
*/
LIBVGMSTREAM_API int libvgmstream_format_describe(libvgmstream_t* lib, char* dst, int dst_size);
#endif
#endif

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src/api_tags.h
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#ifndef _API_TAGS_H_
#define _API_TAGS_H_
#include "api.h"
#if LIBVGMSTREAM_ENABLE
/* vgmstream's !tags.m3u API.
* Doesn't need a main libvgmstream as tags aren't tied to loaded songs.
*
* Meant to be a simple implementation; feel free to ignore and roll your own
* (or use another external tags plugin).
*/
/* tag state */
typedef struct {
void* priv; // internal data
const char* key; // current key
const char* val; // current value
} libvgmstream_tags_t;
/* Initializes tags.
* - libsf should point to a !tags.m3u file
* - unlike libvgmstream_open, sf tagfile must be valid during the tag extraction process.
*/
LIBVGMSTREAM_API libvgmstream_tags_t* libvgmstream_tags_init(libvgmstream_streamfile_t* libsf);
/* Finds tags for a new filename. Must be called first before extracting tags.
*/
LIBVGMSTREAM_API void libvgmstream_tags_find(libvgmstream_tags_t* tags, const char* target_filename);
/* Extracts next valid tag in tagfile to key/val.
* - returns false if no more tags are found (meant to be called repeatedly until false)
* - key/values are trimmed of beginning/end whitespaces and values are in UTF-8
*/
LIBVGMSTREAM_API bool libvgmstream_tags_next_tag(libvgmstream_tags_t* tags);
/* Closes tags. */
LIBVGMSTREAM_API void libvgmstream_tags_free(libvgmstream_tags_t* tags);
#endif
#endif

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src/api_version.h
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#ifndef _API_VERSION_H_
#define _API_VERSION_H_
#include "api.h"
#if LIBVGMSTREAM_ENABLE
/* Current API version.
* - only refers to the API itself, as changes related to formats/etc don't alter this (since they are usually additive)
* - vgmstream's features are mostly stable, but this API may be tweaked from time to time
*/
#define LIBVGMSTREAM_API_VERSION_MAJOR 1 // breaking API/ABI changes
#define LIBVGMSTREAM_API_VERSION_MINOR 0 // compatible API/ABI changes
#define LIBVGMSTREAM_API_VERSION_PATCH 0 // fixes
/* returns API version in hex format: 0xMMmmpppp = MM-major, mm-minor, pppp-patch
* - use when loading vgmstream as a dynamic library to ensure API/ABI compatibility
*/
LIBVGMSTREAM_API uint32_t libvgmstream_get_version(void);
/* CHANGELOG:
*
* - 1.0.0: initial version
*/
#endif
#endif

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src/base/api_internal.h
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#ifndef _API_INTERNAL_H_
#define _API_INTERNAL_H_
#include "../api.h"
#include "../libvgmstream.h"
#include "../util/log.h"
#include "../vgmstream.h"
#include "plugins.h"

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src/base/mixing.h
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#define _MIXING_H_
#include "../vgmstream.h"
#include "../util/log.h"
/* Applies mixing commands to the sample buffer. Mixing must be externally enabled and
* outbuf must big enough to hold output_channels*samples_to_do */

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src/coding/coding.h
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#include "../vgmstream.h"
#include "../util/reader_sf.h"
#include "../util/reader_get_nibbles.h"
#include "../util/log.h"
//todo remove
#include "libs/clhca.h"

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src/layout/layout.h
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#include "../streamtypes.h"
#include "../vgmstream.h"
#include "../util/reader_sf.h"
#include "../util/log.h"
/* blocked layouts */
void render_vgmstream_blocked(sample_t* buffer, int32_t sample_count, VGMSTREAM* vgmstream);

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src/libvgmstream.h Normal file
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/* libvgmstream: vgmstream's public API */
#ifndef _LIBVGMSTREAM_H_
#define _LIBVGMSTREAM_H_
//#define LIBVGMSTREAM_ENABLE 1
#if LIBVGMSTREAM_ENABLE
/* By default vgmstream behaves like a decoder (decode samples until stream end), but you can configure
* it to loop N times or even downmix. In other words, it also behaves a bit like a player.
* It exposes multiple convenience stuff mainly for various plugins that mostly repeat the same features.
* All this may make the API still WIP and a bit twisted, probably will improve later. Probably.
*
* Notes:
* - now there is an API internals (vgmstream.h) may change in the future
* - may dynamically allocate stuff as needed (mainly some buffers, but varies per format)
* - some details described in the API may not happen at the moment (defined for future changes)
* - uses long-winded libvgmstream_* names since internals alredy use the vgmstream_* 'namespace', #define as needed
* - c-strings should be in UTF-8
*
* Basic usage (also see api_example.c):
* - libvgmstream_init(...) // base context
* - libvgmstream_setup(...) // config if needed
* - libvgmstream_open(...) // setup format
* - libvgmstream_play(...) // main decode
* - output samples + repeat libvgmstream_play until stream is done
* - libvgmstream_free(...) // cleanup
*/
/*****************************************************************************/
/* DEFINES */
///* standard C param call and name mangling (to avoid __stdcall / .defs) */
//#define LIBVGMSTREAM_CALL __cdecl //needed?
//LIBVGMSTREAM_API (type) LIBVGMSTREAM_CALL libvgmstream_function(...);
/* external function behavior (for compile time) */
#if defined(LIBVGMSTREAM_EXPORT)
#define LIBVGMSTREAM_API __declspec(dllexport) /* when exporting/creating vgmstream DLL */
#elif defined(LIBVGMSTREAM_IMPORT)
#define LIBVGMSTREAM_API __declspec(dllimport) /* when importing/linking vgmstream DLL */
#else
#define LIBVGMSTREAM_API /* nothing, internal/default */
#endif
#include <stdint.h>
#include <stdbool.h>
#include "libvgmstream_streamfile.h"
/*****************************************************************************/
/* VERSION */
/* Current API version, for static checks.
* - only refers to the API itself, changes related to formats/etc don't alter this
* - vgmstream's features are mostly stable, but this API may be tweaked from time to time
*/
#define LIBVGMSTREAM_API_VERSION_MAJOR 1 // breaking API/ABI changes
#define LIBVGMSTREAM_API_VERSION_MINOR 0 // compatible API/ABI changes
#define LIBVGMSTREAM_API_VERSION_PATCH 0 // fixes
/* Current API version, for dynamic checks. returns hex value: 0xMMmmpppp = MM-major, mm-minor, pppp-patch
* - use when loading vgmstream as a dynamic library to ensure API/ABI compatibility
*/
LIBVGMSTREAM_API uint32_t libvgmstream_get_version(void);
/* CHANGELOG:
* - 1.0.0: initial version
*/
/*****************************************************************************/
/* DECODE */
/* interleaved samples: buf[0]=ch0, buf[1]=ch1, buf[2]=ch0, buf[3]=ch0, ... */
typedef enum {
LIBVGMSTREAM_SAMPLE_PCM16 = 0x01,
LIBVGMSTREAM_SAMPLE_PCM24 = 0x02,
LIBVGMSTREAM_SAMPLE_PCM32 = 0x03,
LIBVGMSTREAM_SAMPLE_FLOAT = 0x04,
} libvgmstream_sample_t;
/* current song info, may be copied around (values are info-only) */
typedef struct {
/* main (always set) */
int channels; // output channels
int sample_rate; // output sample rate
libvgmstream_sample_t sample_type; // output buffer's sample type
int sample_size; // derived from sample_type (pcm16=0x02, float=0x04, etc)
/* extra info (may be 0 if not known or not relevant) */
uint32_t channel_layout; // standard WAVE bitflags
int subsong_index; // 0 = none, N = loaded subsong N (1=first)
int subsong_count; // 0 = format has no concept of subsongs, N = has N subsongs
// ** 1 = format has subsongs, and only 1 for current file
int input_channels; // original file's channels before downmixing (if any)
//int interleave; // when file is interleaved
//int interleave_first; // when file is interleaved
//int interleave_last; // when file is interleaved
//int frame_size; // when file has some configurable frame size
/* sample info (may not be used depending on config) */
int64_t sample_count; // file's max samples (not final play duration)
int64_t loop_start; // loop start sample
int64_t loop_end; // loop end sample
bool loop_flag; // if file loops (false + defined loops means looping was forcefully disabled)
bool play_forever; // if file loops forever based on current config (meaning _play never stops)
int64_t play_samples; // totals after all calculations (after applying loop/fade/etc config)
// ** may not be 100% accurate in some cases (check decoder's 'done' flag to stop)
// ** if play_forever is set this is still provided for reference based on non-forever config
int stream_bitrate; // average bitrate of the subsong (slightly bloated vs codec_bitrate; incorrect in rare cases)
//int codec_bitrate; // average bitrate of the codec data
// ** not possible / slow to calculate in most cases
/* descriptions */
char codec_name[128]; //
char layout_name[128]; //
char meta_name[128]; // (not internal "tag" metadata)
char stream_name[256]; // some internal name or representation, not always useful
// ** these are a bit big for a struct, but the typical use case of vgsmtream is opening a file > immediately
// query description and since libvgmstream returns its own copy it shouldn't be too much of a problem
// ** (may be separated later)
/* misc */
//bool rough_samples; // signal cases where loop points or sample count can't exactly reflect actual behavior
int format_internal_id; // when reopening subfiles or similar formats without checking other all possible formats
// ** this value WILL change without warning between vgmstream versions/commits
} libvgmstream_format_t;
typedef struct {
void* buf; // current decoded buf (valid after _decode until next call; may change between calls)
int buf_samples; // current buffer samples (0 is possible in some cases)
int buf_bytes; // current buffer bytes (channels * sample_size * samples)
bool done; // when stream is done based on config
// ** note that with play_forever this flag is never set
} libvgmstream_decoder_t;
/* vgmstream context/handle */
typedef struct {
void* priv; // internal data
/* pointers for easier ABI compatibility */
const libvgmstream_format_t* format; // current song info, updated on _open
libvgmstream_decoder_t* decoder; // updated on each _decode call
} libvgmstream_t;
/* Inits the vgmstream context
* - returns NULL on error
*/
LIBVGMSTREAM_API libvgmstream_t* libvgmstream_init(void);
/* Frees the vgmstream context and any other internal stuff.
*/
LIBVGMSTREAM_API void libvgmstream_free(libvgmstream_t* lib);
/* configures how vgmstream behaves internally when playing a file */
typedef struct {
bool disable_config_override; // ignore forced (TXTP) config
bool allow_play_forever; // must allow manually as some cases a TXTP may set loop forever but client may not handle it
bool play_forever; // keeps looping forever (file must have loop_flag set)
bool ignore_loop; // ignores loops points
bool force_loop; // enables full loops (0..samples) if file doesn't have loop points
bool really_force_loop; // forces full loops (0..samples) even if file has loop points
bool ignore_fade; // don't fade after N loops and play remaning stream (for files with outros)
double loop_count; // target loops (values like 1.5 are ok)
double fade_time; // fade period after target loops
double fade_delay; // fade delay after target loops
int auto_downmix_channels; // downmixing if vgmstream's channels are higher than value
// ** for players that can only handle N channels
// ** this type of downmixing is very simplistic and not recommended
bool force_pcm16; // forces output buffer to be remixed into PCM16
} libvgmstream_config_t;
/* pass default config, that will be applied to song on open
* - invalid config or complex cases (ex. some TXTP) may ignore these settings.
* - called without a song loaded (before _open or after _close), otherwise ignored.
* - without config vgmstream will decode the current stream once
*/
LIBVGMSTREAM_API void libvgmstream_setup(libvgmstream_t* lib, libvgmstream_config_t* cfg);
/* configures how vgmstream opens the format */
typedef struct {
libvgmstream_streamfile_t* libsf; // custom IO streamfile that provides reader info for vgmstream
// ** not needed after _open and should be closed, as vgmstream re-opens its own SFs internally as needed
int subsong; // target subsong (1..N) or 0 = default/first
// ** to check if a file has subsongs, _open first + check format->total_subsongs (then _open 2nd, 3rd, etc)
int format_internal_id; // force a format (for example when loading new subsong of the same archive)
int stereo_track; // forces vgmstream to decode one 2ch+2ch+2ch... 'track' and discard other channels, where 0 = disabled, 1..N = Nth track
} libvgmstream_options_t;
/* Opens file based on config and prepares it to play if supported.
* - returns < 0 on error (file not recognised, invalid subsong index, etc)
* - will close currently loaded song if needed
*/
LIBVGMSTREAM_API int libvgmstream_open(libvgmstream_t* lib, libvgmstream_options_t* open_options);
/* Closes current song; may still use libvgmstream to open other songs
*/
LIBVGMSTREAM_API void libvgmstream_close(libvgmstream_t* lib);
/* Decodes next batch of samples
* - vgmstream supplies its own buffer, updated on lib->decoder->* values (may change between calls)
* - returns < 0 on error
*/
LIBVGMSTREAM_API int libvgmstream_play(libvgmstream_t* lib);
/* Same as _play, but fills some external buffer (also updates lib->decoder->* values)
* - returns < 0 on error, or N = number of filled samples.
* - buf must be at least as big as channels * sample_size * buf_samples
* - needs copying around from internal bufs so may be slightly slower; mainly for cases when you have buf constraints
*/
LIBVGMSTREAM_API int libvgmstream_fill(libvgmstream_t* lib, void* buf, int buf_samples);
/* Gets current position within the song.
* - return < 0 on error
*/
LIBVGMSTREAM_API int64_t libvgmstream_get_play_position(libvgmstream_t* lib);
/* Seeks to absolute position. Will clamp incorrect values such as seeking before/past playable length.
*/
LIBVGMSTREAM_API void libvgmstream_seek(libvgmstream_t* lib, int64_t sample);
/* Reset current song
*/
LIBVGMSTREAM_API void libvgmstream_reset(libvgmstream_t* lib);
/*****************************************************************************/
/* HELPERS */
typedef enum {
LIBVGMSTREAM_LOG_LEVEL_ALL = 0,
LIBVGMSTREAM_LOG_LEVEL_DEBUG = 20,
LIBVGMSTREAM_LOG_LEVEL_INFO = 30,
LIBVGMSTREAM_LOG_LEVEL_NONE = 100,
} libvgmstream_loglevel_t;
typedef struct {
libvgmstream_loglevel_t level; // log level
void (*callback)(int level, const char* str); // log callback
bool stdout_callback; // use default log callback rather than user supplied
} libvgmstream_log_t;
/* Defines a global log callback, as vgmstream sometimes communicates format issues to the user.
* - note that log is currently set globally rather than per libvgmstream_t
*/
LIBVGMSTREAM_API void libvgmstream_set_log(libvgmstream_log_t* cfg);
/* Returns a list of supported extensions (WARNING: it's pretty big), such as "adx", "dsp", etc.
* Mainly for plugins that want to know which extensions are supported.
* - returns NULL if no size is provided
*/
LIBVGMSTREAM_API const char** libvgmstream_get_extensions(size_t* size);
/* Same as above, buf returns a list what vgmstream considers "common" formats (such as "wav", "ogg"),
* which usually one doesn't want to associate to vgmstream.
* - returns NULL if no size is provided
*/
LIBVGMSTREAM_API const char** libvgmstream_get_common_extensions(size_t* size);
typedef struct {
bool is_extension; /* set if filename is just an extension */
bool skip_default; /* set if shouldn't check default formats */
bool reject_extensionless; /* set if player can't play extensionless files */
bool accept_unknown; /* set to allow any extension (for txth) */
bool accept_common; /* set to allow known-but-common extension (when player has plugin priority) */
} libvgmstream_valid_t;
/* Returns if vgmstream can parse a filename by extension, to reject some files earlier
* - doesn't check file contents (that's only done on _open)
* - config may be NULL
* - mainly for plugins that fail early; libvgmstream doesn't use this
*/
LIBVGMSTREAM_API bool libvgmstream_is_valid(const char* filename, libvgmstream_valid_t* cfg);
typedef struct {
bool force_title; // TODO: what was this for?
bool subsong_range; // print a range of possible subsongs after title 'filename#1~N'
bool remove_extension; // remove extension from passed filename
bool remove_archive; // remove '(archive)|(subfile)' format of some plugins
const char* filename; // base file's filename
// ** note that sometimes vgmstream doesn't have/know the original name, so it's needed again here
} libvgmstream_title_t;
/* Get a simple title for plugins, derived from internal stream name if available
* - valid after _open
*/
LIBVGMSTREAM_API int libvgmstream_get_title(libvgmstream_t* lib, libvgmstream_title_t* cfg, char* buf, int buf_len);
/* Writes a description of the current song into dst. Will always be null-terminated.
* - returns < 0 if file was truncated, though will still succeed.
*/
LIBVGMSTREAM_API int libvgmstream_format_describe(libvgmstream_t* lib, char* dst, int dst_size);
/*****************************************************************************/
/* TAGS */
/* Meant to be a simple implementation; feel free to ignore and roll your own (or use another tags plugin).
* Doesn't need a main libvgmstream as tags aren't tied to loaded songs. */
/* tag state */
typedef struct {
void* priv; // internal data
const char* key; // current key
const char* val; // current value
} libvgmstream_tags_t;
/* Initializes tags.
* - libsf should point to a !tags.m3u file
* - unlike libvgmstream_open, sf tagfile must be valid during the tag extraction process.
*/
LIBVGMSTREAM_API libvgmstream_tags_t* libvgmstream_tags_init(libvgmstream_streamfile_t* libsf);
/* Finds tags for a new filename. Must be called first before extracting tags.
*/
LIBVGMSTREAM_API void libvgmstream_tags_find(libvgmstream_tags_t* tags, const char* target_filename);
/* Extracts next valid tag in tagfile to key/val.
* - returns false if no more tags are found (meant to be called repeatedly until false)
* - key/values are trimmed of beginning/end whitespaces and values are in UTF-8
*/
LIBVGMSTREAM_API bool libvgmstream_tags_next_tag(libvgmstream_tags_t* tags);
/* Closes tags. */
LIBVGMSTREAM_API void libvgmstream_tags_free(libvgmstream_tags_t* tags);
#endif
#endif

7
src/libvgmstream.vcxproj
View File

@ -81,11 +81,8 @@
</ItemDefinitionGroup>
<ItemGroup>
<ClInclude Include="api.h" />
<ClInclude Include="api_decode.h" />
<ClInclude Include="api_helpers.h" />
<ClInclude Include="api_streamfile.h" />
<ClInclude Include="api_tags.h" />
<ClInclude Include="api_version.h" />
<ClInclude Include="libvgmstream.h" />
<ClInclude Include="libvgmstream_streamfile.h" />
<ClInclude Include="streamfile.h" />
<ClInclude Include="streamtypes.h" />
<ClInclude Include="util.h" />

13
src/libvgmstream.vcxproj.filters
View File

@ -77,19 +77,10 @@
<ClInclude Include="api.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="api_decode.h">
<ClInclude Include="libvgmstream.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="api_helpers.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="api_streamfile.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="api_tags.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="api_version.h">
<ClInclude Include="libvgmstream_streamfile.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="streamfile.h">

29
src/api_streamfile.h → src/libvgmstream_streamfile.h
View File

@ -1,18 +1,13 @@
#ifndef _API_STREAMFILE_H_
#define _API_STREAMFILE_H_
#include "api.h"
#ifndef _LIBVGMSTREAM_STREAMFILE_H_
#define _LIBVGMSTREAM_STREAMFILE_H_
#include "libvgmstream.h"
#if LIBVGMSTREAM_ENABLE
/* vgmstream's IO API, defined as a "streamfile" (SF).
*
* Compared to typical IO, vgmstream has some extra needs that roughly assume there is an underlying filesystem (as usual in games):
* - seeking + reading from arbitrary offsets: header not in the beginning of a stream, rewinding back when looping, etc
* - opening other streamfiles: reopening a copy of the current SF, formats with split header + data, decryption files, etc
* - extracting the filename: opening similarly named companion files, basic extension sanity checks, heuristics for odd cases, etc
*
* If your IO can't fully satisfy those constraints, it may still be possible to create a streamfile that just simulates part of it.
* For example, returning a fake filename, and only handling "open" that reopens itself (same filename), while returning default/incorrect
* values for non-handled operations. Simpler formats will probably work just fine.
* vgmstream roughly assumes there is an underlying filesystem (as usual in games): seeking + reading from arbitrary offsets,
* opening companion files, filename tests, etc. If your case is too different you may still create a partial streamfile: returning
* a fake filename, only handling "open" that reopens itself (same filename), etc. Simpler formats will probably work just fine.
*/
@ -28,26 +23,26 @@ typedef struct libvgmstream_streamfile_t {
//uint32_t flags; // info flags for vgmstream
void* user_data; // any internal structure
/* read 'length' data at internal offset to 'dst' (implicit seek if needed)
* - assumes 0 = failure/EOF
/* read 'length' data at internal offset to 'dst'
* - assumes 0 = failure/EOF
*/
int (*read)(void* user_data, uint8_t* dst, int dst_size);
/* seek to offset
* - note that due to how vgmstream works this is a fairly common operation (to be optimized later)
* - note that vgmstream needs to seek + read fairly often (to be optimized later)
*/
int64_t (*seek)(void* user_data, int64_t offset, int whence);
/* get max offset
/* get max offset (typically for checks or calculations)
*/
int64_t (*get_size)(void* user_data);
/* get current filename
/* get current filename (used to open same or other streamfiles and heuristics; no need to be a real path)
*/
const char* (*get_name)(void* user_data);
/* open another streamfile from filename (may be some path/protocol, or same as current get_name = reopen)
* - vgmstream mainly opens stuff based on current get_name (relative), so there shouldn't be need to transform this path
* - vgmstream opens stuff based on current get_name (relative), so there shouldn't be need to transform this path
*/
struct libvgmstream_streamfile_t* (*open)(void* user_data, const char* filename);

1
src/meta/meta.h
View File

@ -5,6 +5,7 @@
#include "../util/reader_sf.h"
#include "../util/reader_text.h"
#include "../util/sf_utils.h"
#include "../util/log.h"
typedef VGMSTREAM* (*init_vgmstream_t)(STREAMFILE* sf);

35
src/vgmstream.h
View File

@ -23,7 +23,6 @@
#include "streamfile.h"
#include "vgmstream_types.h"
#include "util/log.h"
#ifdef VGM_USE_MP4V2
#define MP4V2_NO_STDINT_DEFS
@ -38,14 +37,14 @@
typedef struct {
int config_set; /* some of the mods below are set */
bool config_set; /* some of the mods below are set */
/* modifiers */
int play_forever;
int ignore_loop;
int force_loop;
int really_force_loop;
int ignore_fade;
bool play_forever;
bool ignore_loop;
bool force_loop;
bool really_force_loop;
bool ignore_fade;
/* processing */
double loop_count;
@ -66,18 +65,18 @@ typedef struct {
double pad_end_s;
/* internal flags */
int pad_begin_set;
int trim_begin_set;
int body_time_set;
int loop_count_set;
int trim_end_set;
int fade_delay_set;
int fade_time_set;
int pad_end_set;
bool pad_begin_set;
bool trim_begin_set;
bool body_time_set;
bool loop_count_set;
bool trim_end_set;
bool fade_delay_set;
bool fade_time_set;
bool pad_end_set;
/* for lack of a better place... */
int is_txtp;
int is_mini_txtp;
bool is_txtp;
bool is_mini_txtp;
} play_config_t;
@ -165,7 +164,7 @@ typedef struct {
meta_t meta_type; /* type of metadata */
/* loop config */
int loop_flag; /* is this stream looped? */
bool loop_flag; /* is this stream looped? */
int32_t loop_start_sample; /* first sample of the loop (included in the loop) */
int32_t loop_end_sample; /* last sample of the loop (not included in the loop) */