cml/libcw
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

midi::device now allows a MIDI file to act as a virtual MIDI input device.

Browse Source 
Thread polling moved out of midi::alsa and into midi::device.
Added latency measure feature to midi::device.
Improved midi::alsa device lookup time with alsa_device_t.clientIdToDevIdxMap[].
Added cwMidiAlsa.h to provide an interface for midi::alsa independent of midi::device.
This commit is contained in:
kevin 2024-02-14 11:20:40 -05:00
parent 742fc05e81
commit 8fe6f3627c
6 changed files with 2053 additions and 1491 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

948
cwMidiAlsa.cpp
View File

File diff suppressed because it is too large Load Diff

44
cwMidiAlsa.h Normal file
View File

@ -0,0 +1,44 @@
namespace cw
{
namespace midi
{
namespace device
{
namespace alsa
{
typedef handle< struct alsa_device_str> handle_t;
rc_t create( handle_t& h, cbFunc_t cbFunc, void* cbDataPtr, unsigned parserBufByteCnt, const char* appNameStr );
rc_t destroy( handle_t& h);
bool isInitialized( handle_t h );
struct pollfd* pollFdArray( handle_t h, unsigned& arrayCntRef );
rc_t handleInputMsg( handle_t h );
unsigned count( handle_t h );
const char* name( handle_t h, unsigned devIdx );
unsigned nameToIndex(handle_t h, const char* deviceName);
unsigned portCount( handle_t h, unsigned devIdx, unsigned flags );
const char* portName( handle_t h, unsigned devIdx, unsigned flags, unsigned portIdx );
unsigned portNameToIndex( handle_t h, unsigned devIdx, unsigned flags, const char* portName );
rc_t portEnable( handle_t h, unsigned devIdx, unsigned flags, unsigned portIdx, bool enableFl );
rc_t send( handle_t h, unsigned devIdx, unsigned portIdx, uint8_t st, uint8_t d0, uint8_t d1 );
rc_t sendData( handle_t h, unsigned devIdx, unsigned portIdx, const uint8_t* dataPtr, unsigned byteCnt );
// Latency measurment:
// Record the time of the next incoming note-on msg
// and the time of the next outgoing note-on msg
// Reset the latency measurement process.
void latency_measure_reset(handle_t h);
latency_meas_result_t latency_measure_result(handle_t h);
void report( handle_t h, textBuf::handle_t tbH);
}
}
}
}

1169
cwMidiDevice.cpp
View File

File diff suppressed because it is too large Load Diff

102
cwMidiDevice.h
View File

@ -1,15 +1,12 @@
#ifndef cwMidiPort_H
#define cwMidiPort_H
#include "cwMidiDecls.h"
namespace cw
{
namespace midi
{
//( { file_desc:"Device independent MIDI port related code." kw:[midi]}
// Flags used to identify input and output ports on MIDI devices
enum
{
@ -17,60 +14,29 @@ namespace cw
kOutMpFl = 0x02
};
typedef void (*cbFunc_t)( const packet_t* pktArray, unsigned pktCnt );
//)
//( { label:parser file_desc:"MIDI event parser converts raw MIDI events into packet_t messages." kw:[midi]}
//===============================================================================================
// MIDI Parser
//
namespace parser
{
typedef handle<struct parser_str> handle_t;
// 'cbFunc' and 'cbDataPtr' are optional. If 'cbFunc' is not supplied in the call to
// create() it may be supplied later by installCallback().
// 'bufByteCnt' defines is the largest complete system-exclusive message the parser will
// by able to transmit. System-exclusive messages larger than this will be broken into
// multiple sequential callbacks.
rc_t create( handle_t& hRef, unsigned devIdx, unsigned portIdx, cbFunc_t cbFunc, void* cbArg, unsigned bufByteCnt );
rc_t destroy( handle_t& hRef );
unsigned errorCount( handle_t h );
void parseMidiData( handle_t h, const time::spec_t* timestamp, const uint8_t* buf, unsigned bufByteCnt );
// The following two functions are intended to be used togetther.
// Use midiTriple() to insert pre-parsed msg's to the output buffer,
// and then use transmit() to send the buffer via the parsers callback function.
// Set the data bytes to 0xff if they are not used by the message.
rc_t midiTriple( handle_t h, const time::spec_t* timestamp, uint8_t status, uint8_t d0, uint8_t d1 );
rc_t transmit( handle_t h );
// Install/Remove additional callbacks.
rc_t installCallback( handle_t h, cbFunc_t cbFunc, void* cbDataPtr );
rc_t removeCallback( handle_t h, cbFunc_t cbFunc, void* cbDataPtr );
// Returns true if the parser uses the given callback.
bool hasCallback( handle_t h, cbFunc_t cbFunc, void* cbDataPtr );
}
//)
//( { label:cmMidiPort file_desc:"Device independent MIDI port." kw:[midi]}
//===============================================================================================
// MIDI Device Interface
//
namespace device
{
typedef handle< struct device_str> handle_t;
rc_t create( handle_t& h,
cbFunc_t cbFunc,
void* cbArg,
const char* filePortLabelA[], // filePortLabelA[ maxFileCnt ]
unsigned maxFileCnt, // count of file dev ports
const char* appNameStr,
const char* fileDevName = "file_dev",
unsigned fileDevReadAheadMicros = 3000,
unsigned parserBufByteCnt = 1024 );
rc_t create( handle_t& h,
cbFunc_t cbFunc,
void* cbArg,
const object_t* args );
// 'cbFunc' and 'cbDataPtr' are optional (they may be set to NULL). In this case
// 'cbFunc' and 'cbDataPtr' may be set in a later call to cmMpInstallCallback().
rc_t create( handle_t& h, cbFunc_t cbFunc, void* cbDataPtr, unsigned parserBufByteCnt, const char* appNameStr );
rc_t destroy( handle_t& h);
bool isInitialized( handle_t h );
@ -80,15 +46,19 @@ namespace cw
unsigned portCount( handle_t h, unsigned devIdx, unsigned flags );
const char* portName( handle_t h, unsigned devIdx, unsigned flags, unsigned portIdx );
unsigned portNameToIndex( handle_t h, unsigned devIdx, unsigned flags, const char* portName );
rc_t portEnable( handle_t h, unsigned devIdx, unsigned flags, unsigned portIdx, bool enableFl );
rc_t send( handle_t h, unsigned devIdx, unsigned portIdx, uint8_t st, uint8_t d0, uint8_t d1 );
rc_t sendData( handle_t h, unsigned devIdx, unsigned portIdx, const uint8_t* dataPtr, unsigned byteCnt );
// Set devIdx to -1 to assign the callback to all devices.
// Set portIdx to -1 to assign the callback to all ports on the specified devices.
//
rc_t installCallback( handle_t h, unsigned devIdx, unsigned portIdx, cbFunc_t cbFunc, void* cbDataPtr );
rc_t removeCallback( handle_t h, unsigned devIdx, unsigned portIdx, cbFunc_t cbFunc, void* cbDataPtr );
bool usesCallback( handle_t h, unsigned devIdx, unsigned portIdx, cbFunc_t cbFunc, void* cbDataPtr );
rc_t openMidiFile( handle_t h, unsigned devIdx, unsigned portIdx, const char* fname );
rc_t seekToMsg( handle_t h, unsigned devIdx, unsigned portIdx, unsigned msgIdx );
rc_t setEndMsg( handle_t h, unsigned devIdx, unsigned portidx, unsigned msgIdx );
rc_t start( handle_t h );
rc_t stop( handle_t h );
rc_t pause( handle_t h, bool pause_fl );
typedef struct
{
@ -96,13 +66,21 @@ namespace cw
time::spec_t note_on_output_ts;
} latency_meas_result_t;
// Reset the latency measurement process.
void latency_measure_setup(handle_t h);
latency_meas_result_t latency_measure_result(handle_t h);
typedef struct
{
latency_meas_result_t alsa_dev;
latency_meas_result_t file_dev;
} latency_meas_combined_result_t;
// Reset the latency measurement process. Record the time of the first
// incoming note-on msg and the first outgoing note-on msg.
void latency_measure_reset(handle_t h);
latency_meas_combined_result_t latency_measure_result(handle_t h);
rc_t report( handle_t h );
void report( handle_t h, textBuf::handle_t tbH);
rc_t test();
rc_t testReport();
}
}
}

1163
cwMidiFileDev.cpp
View File

File diff suppressed because it is too large Load Diff

118
cwMidiFileDev.h
View File

@ -2,37 +2,99 @@ namespace cw
{
namespace midi
{
namespace file_dev
namespace device
{
typedef handle<struct file_dev_str> handle_t;
rc_t create( handle_t& hRef, const char* labelA[], unsigned max_file_cnt );
rc_t destroy( handle_t& hRef );
unsigned file_count( handle_t h );
rc_t open_midi_file( handle_t h, unsigned file_idx, const char* fname );
rc_t seek_to_event( handle_t h, unsigned file_idx, unsigned msg_idx );
rc_t start( handle_t h );
rc_t stop( handle_t h );
rc_t enable_file( handle_t h, unsigned file_idx );
rc_t disable_file( handle_t h,unsigned file_idx );
int file_descriptor( handle_t h );
typedef struct msg_str
namespace file_dev
{
const file::trackMsg_t* msg;
unsigned file_idx;
} msg_t;
rc_t read( handle_t h, msg_t* buf, unsigned buf_msg_cnt, unsigned& actual_msg_cnt_ref );
typedef handle<struct file_dev_str> handle_t;
rc_t test( const object_t* cfg );
//
// Count of labels determines the count of ports.
// Note that port indexes and file indexes are synonomous.
rc_t create( handle_t& hRef,
cbFunc_t cbFunc,
void* cbArg,
unsigned baseDevIdx, // device index assigned to packet_t.devIndex in callbacks
const char* labelA[], // labelA[ max_file_cnt ] assigns a textual label to each port.
unsigned max_file_cnt,
const char* dev_name = "file_dev", // name of the file device
unsigned read_ahead_micros = 3000); // exec() will xmit events up to 'read_ahead_micros' after the current time
rc_t destroy( handle_t& hRef );
// Return true if at least one enabled file exists, otherwise return false.
bool is_active( handle_t h );
// Returns create(...,max_file_cnt...)
unsigned file_count( handle_t h );
// Assign a MIDI file to an input port.
rc_t open_midi_file( handle_t h, unsigned file_idx, const char* fname );
rc_t load_messages( handle_t h, unsigned file_idx, const msg_t* msgA, unsigned msgN );
// Enable and disble the output of the specified file/port.
rc_t enable_file( handle_t h, unsigned file_idx, bool enableFl );
rc_t enable_file( handle_t h, unsigned file_idx );
rc_t disable_file( handle_t h,unsigned file_idx );
// Device count: Always 1.
unsigned count( handle_t h );
// Device name as set in create()
const char* name( handle_t h, unsigned devIdx );
// Returns 0 if deviceName == name() else kInvalidIdx
unsigned nameToIndex(handle_t h, const char* deviceName);
// The count of ports is determined by count of labels in create(...,labelA[],...).
unsigned portCount( handle_t h, unsigned devIdx, unsigned flags );
// Port name are provided by create(...,labelA[],...)
// Port indexes and file indexes are the same.
const char* portName( handle_t h, unsigned devIdx, unsigned flags, unsigned portIdx );
unsigned portNameToIndex( handle_t h, unsigned devIdx, unsigned flags, const char* portName );
rc_t portEnable( handle_t h, unsigned devIdx, unsigned flags, unsigned portIdx, bool enableFl );
typedef struct exec_result_str
{
unsigned next_msg_wait_micros; // microseconds before the next file msg must be transmitted
unsigned xmit_cnt; // count of msg's sent to callback during this exec
bool eof_fl; // true if there are no more file msg's to transmit
} exec_result_t;
// Set the next msg to be returned.
rc_t seek_to_msg_index( handle_t h, unsigned file_idx, unsigned msg_idx );
rc_t set_end_msg_index( handle_t h, unsigned file_idx, unsigned msg_idx );
// Seek to the start of the file or to the last msg_idx set by seek_to_event().
rc_t rewind( handle_t h );
// Delay the first MIDI msg by 'start_delay_micros'.
rc_t set_start_delay( handle_t h, unsigned start_delay_micros );
// Callback create(...,cbFunc,...) with msg's whose time has expired and return the
// time delay prior to the next message.
exec_result_t exec( handle_t h, unsigned long long elapsed_micros );
rc_t send( handle_t h, unsigned devIdx, unsigned portIdx, uint8_t st, uint8_t d0, uint8_t d1 );
rc_t sendData( handle_t h, unsigned devIdx, unsigned portIdx, const uint8_t* dataPtr, unsigned byteCnt );
// Reset the latency measurement process.
void latency_measure_reset(handle_t h);
latency_meas_result_t latency_measure_result(handle_t h);
void report( handle_t h, textBuf::handle_t tbH );
rc_t test( const object_t* cfg );
}
}
}
}