/* * libopenmpt_ext.h * ---------------- * Purpose: libopenmpt public c interface for libopenmpt extensions * Notes : * Authors: OpenMPT Devs * The OpenMPT source code is released under the BSD license. Read LICENSE for more details. */ #ifndef LIBOPENMPT_EXT_H #define LIBOPENMPT_EXT_H #include "libopenmpt_config.h" #include "libopenmpt.h" #ifdef __cplusplus extern "C" { #endif /*! * \page libopenmpt_ext_c_overview libopenmpt_ext C API * * libopenmpt_ext is included in all builds by default. * * \section libopenmpt-ext-c-detailed Detailed documentation * * \ref libopenmpt_ext_c * */ /*! \defgroup libopenmpt_ext_c libopenmpt_ext C */ /*! \addtogroup libopenmpt_ext_c * @{ */ /*! \brief Opaque type representing a libopenmpt extension module */ typedef struct openmpt_module_ext openmpt_module_ext; /*! \brief Construct an openmpt_module_ext * * \param stream_callbacks Input stream callback operations. * \param stream Input stream to load the module from. * \param logfunc Logging function where warning and errors are written. The logging function may be called throughout the lifetime of openmpt_module_ext. May be NULL. * \param loguser User-defined data associated with this module. This value will be passed to the logging callback function (logfunc) * \param errfunc Error function to define error behaviour. May be NULL. * \param erruser Error function user context. Used to pass any user-defined data associated with this module to the logging function. * \param error Pointer to an integer where an error may get stored. May be NULL. * \param error_message Pointer to a string pointer where an error message may get stored. May be NULL. * \param ctls A map of initial ctl values, see openmpt_module_get_ctls. * \return A pointer to the constructed openmpt_module_ext, or NULL on failure. * \remarks The input data can be discarded after an openmpt_module_ext has been constructed successfully. * \sa openmpt_stream_callbacks * \sa \ref libopenmpt_c_fileio * \since 0.3.0 */ LIBOPENMPT_API openmpt_module_ext * openmpt_module_ext_create( openmpt_stream_callbacks stream_callbacks, void * stream, openmpt_log_func logfunc, void * loguser, openmpt_error_func errfunc, void * erruser, int * error, const char * * error_message, const openmpt_module_initial_ctl * ctls ); /*! \brief Construct an openmpt_module_ext * * \param filedata Data to load the module from. * \param filesize Amount of data available. * \param logfunc Logging function where warning and errors are written. The logging function may be called throughout the lifetime of openmpt_module_ext. * \param loguser User-defined data associated with this module. This value will be passed to the logging callback function (logfunc) * \param errfunc Error function to define error behaviour. May be NULL. * \param erruser Error function user context. Used to pass any user-defined data associated with this module to the logging function. * \param error Pointer to an integer where an error may get stored. May be NULL. * \param error_message Pointer to a string pointer where an error message may get stored. May be NULL. * \param ctls A map of initial ctl values, see openmpt_module_get_ctls. * \return A pointer to the constructed openmpt_module_ext, or NULL on failure. * \remarks The input data can be discarded after an openmpt_module_ext has been constructed successfully. * \sa \ref libopenmpt_c_fileio * \since 0.3.0 */ LIBOPENMPT_API openmpt_module_ext * openmpt_module_ext_create_from_memory( const void * filedata, size_t filesize, openmpt_log_func logfunc, void * loguser, openmpt_error_func errfunc, void * erruser, int * error, const char * * error_message, const openmpt_module_initial_ctl * ctls ); /*! \brief Unload a previously created openmpt_module_ext from memory. * * \param mod_ext The module to unload. */ LIBOPENMPT_API void openmpt_module_ext_destroy( openmpt_module_ext * mod_ext ); /*! \brief Retrieve the openmpt_module handle from an openmpt_module_ext handle. * * \param mod_ext The extension module handle to convert * \return An equivalent openmpt_module handle to pass to standard libopenmpt functions * \since 0.3.0 */ LIBOPENMPT_API openmpt_module * openmpt_module_ext_get_module( openmpt_module_ext * mod_ext ); /*! Retrieve a libopenmpt extension. * * \param mod_ext The module handle to work on. * \param interface_id The name of the extension interface to retrieve (e.g. LIBOPENMPT_EXT_C_INTERFACE_PATTERN_VIS). * \param interface Appropriate structure of interface function pointers which is to be filled by this function (e.g. a pointer to a openmpt_module_ext_interface_pattern_vis structure). * \param interface_size Size of the interface's structure of function pointers (e.g. sizeof(openmpt_module_ext_interface_pattern_vis)). * \return 1 on success, 0 if the interface was not found. * \since 0.3.0 */ LIBOPENMPT_API int openmpt_module_ext_get_interface( openmpt_module_ext * mod_ext, const char * interface_id, void * interface, size_t interface_size ); #ifndef LIBOPENMPT_EXT_C_INTERFACE_PATTERN_VIS #define LIBOPENMPT_EXT_C_INTERFACE_PATTERN_VIS "pattern_vis" #endif /*! Pattern command type */ #define OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_UNKNOWN 0 #define OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_GENERAL 1 #define OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_GLOBAL 2 #define OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_VOLUME 3 #define OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_PANNING 4 #define OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_PITCH 5 typedef struct openmpt_module_ext_interface_pattern_vis { /*! Get pattern command type for pattern highlighting * * \param mod_ext The module handle to work on. * \param pattern The pattern whose data should be retrieved. * \param row The row from which the data should be retrieved. * \param channel The channel from which the data should be retrieved. * \return The command type in the effect column at the given pattern position (see OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_*) * \sa openmpt_module_ext_interface_pattern_vis::get_pattern_row_channel_volume_effect_type */ int ( * get_pattern_row_channel_volume_effect_type ) ( openmpt_module_ext * mod_ext, int32_t pattern, int32_t row, int32_t channel ); /*! Get pattern command type for pattern highlighting * * \param mod_ext The module handle to work on. * \param pattern The pattern whose data should be retrieved. * \param row The row from which the data should be retrieved. * \param channel The channel from which the data should be retrieved. * \return The command type in the effect column at the given pattern position (see OPENMPT_MODULE_EXT_INTERFACE_PATTERN_VIS_EFFECT_TYPE_*) * \sa openmpt_module_ext_interface_pattern_vis::get_pattern_row_channel_volume_effect_type */ int ( * get_pattern_row_channel_effect_type ) ( openmpt_module_ext * mod_ext, int32_t pattern, int32_t row, int32_t channel ); } openmpt_module_ext_interface_pattern_vis; #ifndef LIBOPENMPT_EXT_C_INTERFACE_INTERACTIVE #define LIBOPENMPT_EXT_C_INTERFACE_INTERACTIVE "interactive" #endif typedef struct openmpt_module_ext_interface_interactive { /*! Set the current ticks per row (speed) * * \param mod_ext The module handle to work on. * \param speed The new tick count in range [1, 65535]. * \return 1 on success, 0 on failure. * \remarks The tick count may be reset by pattern commands at any time. * \sa openmpt_module_get_current_speed */ int ( * set_current_speed ) ( openmpt_module_ext * mod_ext, int32_t speed ); /*! Set the current module tempo * * \param mod_ext The module handle to work on. * \param tempo The new tempo in range [32, 512]. The exact meaning of the value depends on the tempo mode used by the module. * \return 1 on success, 0 on failure. * \remarks The tempo may be reset by pattern commands at any time. Use openmpt_module_ext_interface_interactive::set_tempo_factor to apply a tempo factor that is independent of pattern commands. * \sa openmpt_module_get_current_tempo */ int ( * set_current_tempo ) ( openmpt_module_ext * mod_ext, int32_t tempo ); /*! Set the current module tempo factor without affecting playback pitch * * \param mod_ext The module handle to work on. * \param factor The new tempo factor in range ]0.0, 4.0] - 1.0 means unmodified tempo. * \return 1 on success, 0 on failure. * \remarks Modifying the tempo without applying the same pitch factor using openmpt_module_ext_interface_interactive::set_pitch_factor may cause rhythmic samples (e.g. drum loops) to go out of sync. * \sa openmpt_module_ext_interface_interactive::get_tempo_factor */ int ( * set_tempo_factor ) ( openmpt_module_ext * mod_ext, double factor ); /*! Gets the current module tempo factor * * \param mod_ext The module handle to work on. * \return The current tempo factor. * \sa openmpt_module_ext_interface_interactive::set_tempo_factor */ double ( * get_tempo_factor ) ( openmpt_module_ext * mod_ext ); /*! Set the current module pitch factor without affecting playback speed * * \param mod_ext The module handle to work on. * \param factor The new pitch factor in range ]0.0, 4.0] - 1.0 means unmodified pitch. * \return 1 on success, 0 on failure. * \remarks Modifying the pitch without applying the the same tempo factor using openmpt_module_ext_interface_interactive::set_tempo_factor may cause rhythmic samples (e.g. drum loops) to go out of sync. * \remarks To shift the pich by `n` semitones, the parameter can be calculated as follows: `pow( 2.0, n / 12.0 )` * \sa openmpt_module_ext_interface_interactive::get_pitch_factor */ int ( * set_pitch_factor ) ( openmpt_module_ext * mod_ext, double factor ); /*! Gets the current module pitch factor * * \param mod_ext The module handle to work on. * \return The current pitch factor. * \sa openmpt_module_ext_interface_interactive::set_pitch_factor */ double ( * get_pitch_factor ) ( openmpt_module_ext * mod_ext ); /*! Set the current global volume * * \param mod_ext The module handle to work on. * \param volume The new global volume in range [0.0, 1.0] * \return 1 on success, 0 on failure. * \remarks The global volume may be reset by pattern commands at any time. Use openmpt_module_set_render_param to apply a global overall volume factor that is independent of pattern commands. * \sa openmpt_module_ext_interface_interactive::get_global_volume */ int ( * set_global_volume ) ( openmpt_module_ext * mod_ext, double volume ); /*! Get the current global volume * * \param mod_ext The module handle to work on. * \return The current global volume in range [0.0, 1.0] * \sa openmpt_module_ext_interface_interactive::set_global_volume */ double ( * get_global_volume ) ( openmpt_module_ext * mod_ext ); /*! Set the current channel volume for a channel * * \param mod_ext The module handle to work on. * \param channel The channel whose volume should be set, in range [0, openmpt_module_get_num_channels()[ * \param volume The new channel volume in range [0.0, 1.0] * \return 1 on success, 0 on failure (channel out of range). * \remarks The channel volume may be reset by pattern commands at any time. * \sa openmpt_module_ext_interface_interactive::get_channel_volume */ int ( * set_channel_volume ) ( openmpt_module_ext * mod_ext, int32_t channel, double volume ); /*! Get the current channel volume for a channel * * \param mod_ext The module handle to work on. * \param channel The channel whose volume should be retrieved, in range [0, openmpt_module_get_num_channels()[ * \return The current channel volume in range [0.0, 1.0] * \sa openmpt_module_ext_interface_interactive::set_channel_volume */ double ( * get_channel_volume ) ( openmpt_module_ext * mod_ext, int32_t channel ); /*! Set the current mute status for a channel * * \param mod_ext The module handle to work on. * \param channel The channel whose mute status should be set, in range [0, openmpt_module_get_num_channels()[ * \param mute The new mute status. true is muted, false is unmuted. * \return 1 on success, 0 on failure (channel out of range). * \sa openmpt_module_ext_interface_interactive::get_channel_mute_status */ int ( * set_channel_mute_status ) ( openmpt_module_ext * mod_ext, int32_t channel, int mute ); /*! Get the current mute status for a channel * * \param mod_ext The module handle to work on. * \param channel The channel whose mute status should be retrieved, in range [0, openmpt_module_get_num_channels()[ * \return The current channel mute status. 1 is muted, 0 is unmuted, -1 means the instrument was out of range * \sa openmpt_module_ext_interface_interactive::set_channel_mute_status */ int ( * get_channel_mute_status ) ( openmpt_module_ext * mod_ext, int32_t channel ); /*! Set the current mute status for an instrument * * \param mod_ext The module handle to work on. * \param instrument The instrument whose mute status should be set, in range [0, openmpt_module_get_num_instruments()[ if openmpt_module_get_num_instruments is not 0, otherwise in [0, openmpt_module_get_num_samples()[ * \param mute The new mute status. true is muted, false is unmuted. * \return 1 on success, 0 on failure (instrument out of range). * \sa openmpt_module_ext_interface_interactive::get_instrument_mute_status */ int ( * set_instrument_mute_status ) ( openmpt_module_ext * mod_ext, int32_t instrument, int mute ); /*! Get the current mute status for an instrument * * \param mod_ext The module handle to work on. * \param instrument The instrument whose mute status should be retrieved, in range [0, openmpt_module_get_num_instruments()[ if openmpt_module_get_num_instruments is not 0, otherwise in [0, openmpt_module_get_num_samples()[ * \return The current instrument mute status. 1 is muted, 0 is unmuted, -1 means the instrument was out of range * \sa openmpt_module_ext_interface_interactive::set_instrument_mute_status */ int ( * get_instrument_mute_status ) ( openmpt_module_ext * mod_ext, int32_t instrument ); /*! Play a note using the specified instrument * * \param mod_ext The module handle to work on. * \param instrument The instrument that should be played, in range [0, openmpt_module_get_num_instruments()[ if openmpt_module_get_num_instruments is not 0, otherwise in [0, openmpt_module_get_num_samples()[ * \param note The note to play, in rage [0, 119]. 60 is the middle C. * \param volume The volume at which the note should be triggered, in range [0.0, 1.0] * \param panning The panning position at which the note should be triggered, in range [-1.0, 1.0], 0.0 is center. * \return The channel on which the note is played. This can pe be passed to openmpt_module_ext_interface_interactive::stop_note to stop the note. -1 means that no channel could be allocated and the note is not played. * \sa openmpt_module_ext_interface_interactive::stop_note */ int32_t ( * play_note ) ( openmpt_module_ext * mod_ext, int32_t instrument, int32_t note, double volume, double panning ); /*! Stop the note playing on the specified channel * * \param mod_ext The module handle to work on. * \param channel The channel on which the note should be stopped. * \return 1 on success, 0 on failure (channel out of range). * \sa openmpt_module_ext_interface_interactive::play_note */ int ( * stop_note ) ( openmpt_module_ext * mod_ext, int32_t channel ); } openmpt_module_ext_interface_interactive; /* add stuff here */ #ifdef __cplusplus } #endif /*! * @} */ #endif /* LIBOPENMPT_EXT_H */