diff options
Diffstat (limited to 'libs/backends/wavesaudio/portmidi/src/pm_common/portmidi.c')
| -rw-r--r-- | libs/backends/wavesaudio/portmidi/src/pm_common/portmidi.c | 1137 |
1 files changed, 0 insertions, 1137 deletions
diff --git a/libs/backends/wavesaudio/portmidi/src/pm_common/portmidi.c b/libs/backends/wavesaudio/portmidi/src/pm_common/portmidi.c deleted file mode 100644 index 0b75222a33..0000000000 --- a/libs/backends/wavesaudio/portmidi/src/pm_common/portmidi.c +++ /dev/null @@ -1,1137 +0,0 @@ -#ifdef _MSC_VER - #pragma warning(disable: 4244) // stop warnings about downsize typecasts - #pragma warning(disable: 4018) // stop warnings about signed/unsigned -#endif - -#include "stdlib.h" -#include "string.h" -#include "portmidi.h" -#include "porttime.h" -#include "pmutil.h" -#include "pminternal.h" -#include <assert.h> - -#define MIDI_CLOCK 0xf8 -#define MIDI_ACTIVE 0xfe -#define MIDI_STATUS_MASK 0x80 -#define MIDI_SYSEX 0xf0 -#define MIDI_EOX 0xf7 -#define MIDI_START 0xFA -#define MIDI_STOP 0xFC -#define MIDI_CONTINUE 0xFB -#define MIDI_F9 0xF9 -#define MIDI_FD 0xFD -#define MIDI_RESET 0xFF -#define MIDI_NOTE_ON 0x90 -#define MIDI_NOTE_OFF 0x80 -#define MIDI_CHANNEL_AT 0xD0 -#define MIDI_POLY_AT 0xA0 -#define MIDI_PROGRAM 0xC0 -#define MIDI_CONTROL 0xB0 -#define MIDI_PITCHBEND 0xE0 -#define MIDI_MTC 0xF1 -#define MIDI_SONGPOS 0xF2 -#define MIDI_SONGSEL 0xF3 -#define MIDI_TUNE 0xF6 - -#define is_empty(midi) ((midi)->tail == (midi)->head) - -/* this is not static so that pm_init can set it directly if - * (see pmmac.c:pm_init()) - */ -int pm_initialized = FALSE; - -int pm_hosterror; -char pm_hosterror_text[PM_HOST_ERROR_MSG_LEN]; - -#ifdef PM_CHECK_ERRORS - -#include <stdio.h> - -#define STRING_MAX 80 - -static void prompt_and_exit(void) -{ - char line[STRING_MAX]; - printf("type ENTER..."); - fgets(line, STRING_MAX, stdin); - /* this will clean up open ports: */ - exit(-1); -} - - -static PmError pm_errmsg(PmError err) -{ - if (err == pmHostError) { - /* it seems pointless to allocate memory and copy the string, - * so I will do the work of Pm_GetHostErrorText directly - */ - printf("PortMidi found host error...\n %s\n", pm_hosterror_text); - pm_hosterror = FALSE; - pm_hosterror_text[0] = 0; /* clear the message */ - prompt_and_exit(); - } else if (err < 0) { - printf("PortMidi call failed...\n %s\n", Pm_GetErrorText(err)); - prompt_and_exit(); - } - return err; -} -#else -#define pm_errmsg(err) err -#endif - -/* -==================================================================== -system implementation of portmidi interface -==================================================================== -*/ - -int pm_descriptor_max = 0; -int pm_descriptor_index = 0; -descriptor_type descriptors = NULL; - -/* pm_add_device -- describe interface/device pair to library - * - * This is called at intialization time, once for each - * interface (e.g. DirectSound) and device (e.g. SoundBlaster 1) - * The strings are retained but NOT COPIED, so do not destroy them! - * - * returns pmInvalidDeviceId if device memory is exceeded - * otherwise returns pmNoError - */ -PmError pm_add_device(char *interf, char *name, int input, - void *descriptor, pm_fns_type dictionary) { - if (pm_descriptor_index >= pm_descriptor_max) { - // expand descriptors - descriptor_type new_descriptors = (descriptor_type) - pm_alloc(sizeof(descriptor_node) * (pm_descriptor_max + 32)); - if (!new_descriptors) return pmInsufficientMemory; - if (descriptors) { - memcpy(new_descriptors, descriptors, - sizeof(descriptor_node) * pm_descriptor_max); - free(descriptors); - } - pm_descriptor_max += 32; - descriptors = new_descriptors; - } - descriptors[pm_descriptor_index].pub.interf = interf; - descriptors[pm_descriptor_index].pub.name = name; - descriptors[pm_descriptor_index].pub.input = input; - descriptors[pm_descriptor_index].pub.output = !input; - - /* default state: nothing to close (for automatic device closing) */ - descriptors[pm_descriptor_index].pub.opened = FALSE; - - /* ID number passed to win32 multimedia API open */ - descriptors[pm_descriptor_index].descriptor = descriptor; - - /* points to PmInternal, allows automatic device closing */ - descriptors[pm_descriptor_index].internalDescriptor = NULL; - - descriptors[pm_descriptor_index].dictionary = dictionary; - - pm_descriptor_index++; - - return pmNoError; -} - - -/* utility to look up device, given a pattern, - note: pattern is modified - */ -int pm_find_default_device(char *pattern, int is_input) -{ - int id = pmNoDevice; - int i; - /* first parse pattern into name, interf parts */ - char *interf_pref = ""; /* initially assume it is not there */ - char *name_pref = strstr(pattern, ", "); - - if (name_pref) { /* found separator, adjust the pointer */ - interf_pref = pattern; - name_pref[0] = 0; - name_pref += 2; - } else { - name_pref = pattern; /* whole string is the name pattern */ - } - for (i = 0; i < pm_descriptor_index; i++) { - const PmDeviceInfo *info = Pm_GetDeviceInfo(i); - if (info->input == is_input && - strstr(info->name, name_pref) && - strstr(info->interf, interf_pref)) { - id = i; - break; - } - } - return id; -} - - -/* -==================================================================== -portmidi implementation -==================================================================== -*/ - -PMEXPORT int Pm_CountDevices( void ) { - Pm_Initialize(); - /* no error checking -- Pm_Initialize() does not fail */ - return pm_descriptor_index; -} - - -PMEXPORT const PmDeviceInfo* Pm_GetDeviceInfo( PmDeviceID id ) { - Pm_Initialize(); /* no error check needed */ - if (id >= 0 && id < pm_descriptor_index) { - return &descriptors[id].pub; - } - return NULL; -} - -/* pm_success_fn -- "noop" function pointer */ -PmError pm_success_fn(PmInternal *midi) { - return pmNoError; -} - -/* none_write -- returns an error if called */ -PmError none_write_short(PmInternal *midi, PmEvent *buffer) { - return pmBadPtr; -} - -/* pm_fail_timestamp_fn -- placeholder for begin_sysex and flush */ -PmError pm_fail_timestamp_fn(PmInternal *midi, PmTimestamp timestamp) { - return pmBadPtr; -} - -PmError none_write_byte(PmInternal *midi, unsigned char byte, - PmTimestamp timestamp) { - return pmBadPtr; -} - -/* pm_fail_fn -- generic function, returns error if called */ -PmError pm_fail_fn(PmInternal *midi) { - return pmBadPtr; -} - -static PmError none_open(PmInternal *midi, void *driverInfo) { - return pmBadPtr; -} -static void none_get_host_error(PmInternal * midi, char * msg, unsigned int len) { - *msg = 0; // empty string -} -static unsigned int none_has_host_error(PmInternal * midi) { - return FALSE; -} -PmTimestamp none_synchronize(PmInternal *midi) { - return 0; -} - -#define none_abort pm_fail_fn -#define none_close pm_fail_fn - -pm_fns_node pm_none_dictionary = { - none_write_short, - none_sysex, - none_sysex, - none_write_byte, - none_write_short, - none_write_flush, - none_synchronize, - none_open, - none_abort, - none_close, - none_poll, - none_has_host_error, - none_get_host_error -}; - - -PMEXPORT const char *Pm_GetErrorText( PmError errnum ) { - const char *msg; - - switch(errnum) - { - case pmNoError: - msg = ""; - break; - case pmHostError: - msg = "PortMidi: `Host error'"; - break; - case pmInvalidDeviceId: - msg = "PortMidi: `Invalid device ID'"; - break; - case pmInsufficientMemory: - msg = "PortMidi: `Insufficient memory'"; - break; - case pmBufferTooSmall: - msg = "PortMidi: `Buffer too small'"; - break; - case pmBadPtr: - msg = "PortMidi: `Bad pointer'"; - break; - case pmInternalError: - msg = "PortMidi: `Internal PortMidi Error'"; - break; - case pmBufferOverflow: - msg = "PortMidi: `Buffer overflow'"; - break; - case pmBadData: - msg = "PortMidi: `Invalid MIDI message Data'"; - break; - case pmBufferMaxSize: - msg = "PortMidi: `Buffer cannot be made larger'"; - break; - default: - msg = "PortMidi: `Illegal error number'"; - break; - } - return msg; -} - - -/* This can be called whenever you get a pmHostError return value. - * The error will always be in the global pm_hosterror_text. - */ -PMEXPORT void Pm_GetHostErrorText(char * msg, unsigned int len) { - assert(msg); - assert(len > 0); - if (pm_hosterror) { - strncpy(msg, (char *) pm_hosterror_text, len); - pm_hosterror = FALSE; - pm_hosterror_text[0] = 0; /* clear the message; not necessary, but it - might help with debugging */ - msg[len - 1] = 0; /* make sure string is terminated */ - } else { - msg[0] = 0; /* no string to return */ - } -} - - -PMEXPORT int Pm_HasHostError(PortMidiStream * stream) { - if (pm_hosterror) return TRUE; - if (stream) { - PmInternal * midi = (PmInternal *) stream; - pm_hosterror = (*midi->dictionary->has_host_error)(midi); - if (pm_hosterror) { - midi->dictionary->host_error(midi, pm_hosterror_text, - PM_HOST_ERROR_MSG_LEN); - /* now error message is global */ - return TRUE; - } - } - return FALSE; -} - - -PMEXPORT PmError Pm_Initialize( void ) { - if (!pm_initialized) { - pm_hosterror = FALSE; - pm_hosterror_text[0] = 0; /* the null string */ - pm_init(); - pm_initialized = TRUE; - } - return pmNoError; -} - - -PMEXPORT PmError Pm_Terminate( void ) { - if (pm_initialized) { - pm_term(); - // if there are no devices, descriptors might still be NULL - if (descriptors != NULL) { - free(descriptors); - descriptors = NULL; - } - pm_descriptor_index = 0; - pm_descriptor_max = 0; - pm_initialized = FALSE; - } - return pmNoError; -} - - -/* Pm_Read -- read up to length messages from source into buffer */ -/* - * returns number of messages actually read, or error code - */ -PMEXPORT int Pm_Read(PortMidiStream *stream, PmEvent *buffer, int32_t length) { - PmInternal *midi = (PmInternal *) stream; - int n = 0; - PmError err = pmNoError; - pm_hosterror = FALSE; - /* arg checking */ - if(midi == NULL) - err = pmBadPtr; - else if(!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - else if(!descriptors[midi->device_id].pub.input) - err = pmBadPtr; - /* First poll for data in the buffer... - * This either simply checks for data, or attempts first to fill the buffer - * with data from the MIDI hardware; this depends on the implementation. - * We could call Pm_Poll here, but that would redo a lot of redundant - * parameter checking, so I copied some code from Pm_Poll to here: */ - else err = (*(midi->dictionary->poll))(midi); - - if (err != pmNoError) { - if (err == pmHostError) { - midi->dictionary->host_error(midi, pm_hosterror_text, - PM_HOST_ERROR_MSG_LEN); - pm_hosterror = TRUE; - } - return pm_errmsg(err); - } - - while (n < length) { - PmError err = Pm_Dequeue(midi->queue, buffer++); - if (err == pmBufferOverflow) { - /* ignore the data we have retreived so far */ - return pm_errmsg(pmBufferOverflow); - } else if (err == 0) { /* empty queue */ - break; - } - n++; - } - return n; -} - -PMEXPORT PmError Pm_Poll( PortMidiStream *stream ) -{ - PmInternal *midi = (PmInternal *) stream; - PmError err; - - pm_hosterror = FALSE; - /* arg checking */ - if(midi == NULL) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.input) - err = pmBadPtr; - else - err = (*(midi->dictionary->poll))(midi); - - if (err != pmNoError) { - if (err == pmHostError) { - midi->dictionary->host_error(midi, pm_hosterror_text, - PM_HOST_ERROR_MSG_LEN); - pm_hosterror = TRUE; - } - return pm_errmsg(err); - } - - return (PmError) !Pm_QueueEmpty(midi->queue); -} - - -/* this is called from Pm_Write and Pm_WriteSysEx to issue a - * call to the system-dependent end_sysex function and handle - * the error return - */ -static PmError pm_end_sysex(PmInternal *midi) -{ - PmError err = (*midi->dictionary->end_sysex)(midi, 0); - midi->sysex_in_progress = FALSE; - if (err == pmHostError) { - midi->dictionary->host_error(midi, pm_hosterror_text, - PM_HOST_ERROR_MSG_LEN); - pm_hosterror = TRUE; - } - return err; -} - - -/* to facilitate correct error-handling, Pm_Write, Pm_WriteShort, and - Pm_WriteSysEx all operate a state machine that "outputs" calls to - write_short, begin_sysex, write_byte, end_sysex, and write_realtime */ - -PMEXPORT PmError Pm_Write( PortMidiStream *stream, PmEvent *buffer, int32_t length) -{ - PmInternal *midi = (PmInternal *) stream; - PmError err = pmNoError; - int i; - int bits; - - pm_hosterror = FALSE; - /* arg checking */ - if(midi == NULL) - err = pmBadPtr; - else if(!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - else if(!descriptors[midi->device_id].pub.output) - err = pmBadPtr; - else - err = pmNoError; - - if (err != pmNoError) goto pm_write_error; - - if (midi->latency == 0) { - midi->now = 0; - } else { - midi->now = (*(midi->time_proc))(midi->time_info); - if (midi->first_message || midi->sync_time + 100 /*ms*/ < midi->now) { - /* time to resync */ - midi->now = (*midi->dictionary->synchronize)(midi); - midi->first_message = FALSE; - } - } - /* error recovery: when a sysex is detected, we call - * dictionary->begin_sysex() followed by calls to - * dictionary->write_byte() and dictionary->write_realtime() - * until an end-of-sysex is detected, when we call - * dictionary->end_sysex(). After an error occurs, - * Pm_Write() continues to call functions. For example, - * it will continue to call write_byte() even after - * an error sending a sysex message, and end_sysex() will be - * called when an EOX or non-real-time status is found. - * When errors are detected, Pm_Write() returns immediately, - * so it is possible that this will drop data and leave - * sysex messages in a partially transmitted state. - */ - for (i = 0; i < length; i++) { - uint32_t msg = buffer[i].message; - bits = 0; - /* is this a sysex message? */ - if (Pm_MessageStatus(msg) == MIDI_SYSEX) { - if (midi->sysex_in_progress) { - /* error: previous sysex was not terminated by EOX */ - midi->sysex_in_progress = FALSE; - err = pmBadData; - goto pm_write_error; - } - midi->sysex_in_progress = TRUE; - if ((err = (*midi->dictionary->begin_sysex)(midi, - buffer[i].timestamp)) != pmNoError) - goto pm_write_error; - if ((err = (*midi->dictionary->write_byte)(midi, MIDI_SYSEX, - buffer[i].timestamp)) != pmNoError) - goto pm_write_error; - bits = 8; - /* fall through to continue sysex processing */ - } else if ((msg & MIDI_STATUS_MASK) && - (Pm_MessageStatus(msg) != MIDI_EOX)) { - /* a non-sysex message */ - if (midi->sysex_in_progress) { - /* this should be a realtime message */ - if (is_real_time(msg)) { - if ((err = (*midi->dictionary->write_realtime)(midi, - &(buffer[i]))) != pmNoError) - goto pm_write_error; - } else { - midi->sysex_in_progress = FALSE; - err = pmBadData; - /* ignore any error from this, because we already have one */ - /* pass 0 as timestamp -- it's ignored */ - (*midi->dictionary->end_sysex)(midi, 0); - goto pm_write_error; - } - } else { /* regular short midi message */ - if ((err = (*midi->dictionary->write_short)(midi, - &(buffer[i]))) != pmNoError) - goto pm_write_error; - continue; - } - } - if (midi->sysex_in_progress) { /* send sysex bytes until EOX */ - /* see if we can accelerate data transfer */ - if (bits == 0 && midi->fill_base && /* 4 bytes to copy */ - (*midi->fill_offset_ptr) + 4 <= midi->fill_length && - (msg & 0x80808080) == 0) { /* all data */ - /* copy 4 bytes from msg to fill_base + fill_offset */ - unsigned char *ptr = midi->fill_base + - *(midi->fill_offset_ptr); - ptr[0] = msg; ptr[1] = msg >> 8; - ptr[2] = msg >> 16; ptr[3] = msg >> 24; - (*midi->fill_offset_ptr) += 4; - continue; - } - /* no acceleration, so do byte-by-byte copying */ - while (bits < 32) { - unsigned char midi_byte = (unsigned char) (msg >> bits); - if ((err = (*midi->dictionary->write_byte)(midi, midi_byte, - buffer[i].timestamp)) != pmNoError) - goto pm_write_error; - if (midi_byte == MIDI_EOX) { - err = pm_end_sysex(midi); - if (err != pmNoError) goto error_exit; - break; /* from while loop */ - } - bits += 8; - } - } else { - /* not in sysex mode, but message did not start with status */ - err = pmBadData; - goto pm_write_error; - } - } - /* after all messages are processed, send the data */ - if (!midi->sysex_in_progress) - err = (*midi->dictionary->write_flush)(midi, 0); -pm_write_error: - if (err == pmHostError) { - midi->dictionary->host_error(midi, pm_hosterror_text, - PM_HOST_ERROR_MSG_LEN); - pm_hosterror = TRUE; - } -error_exit: - return pm_errmsg(err); -} - - -PMEXPORT PmError Pm_WriteShort(PortMidiStream *stream, PmTimestamp when, PmMessage msg) -{ - PmEvent event; - - event.timestamp = when; - event.message = msg; - return Pm_Write(stream, &event, 1); -} - - -PMEXPORT PmError Pm_WriteSysEx(PortMidiStream *stream, PmTimestamp when, - unsigned char *msg) -{ - /* allocate buffer space for PM_DEFAULT_SYSEX_BUFFER_SIZE bytes */ - /* each PmEvent holds sizeof(PmMessage) bytes of sysex data */ - #define BUFLEN ((int) (PM_DEFAULT_SYSEX_BUFFER_SIZE / sizeof(PmMessage))) - PmEvent buffer[BUFLEN]; - int buffer_size = 1; /* first time, send 1. After that, it's BUFLEN */ - PmInternal *midi = (PmInternal *) stream; - /* the next byte in the buffer is represented by an index, bufx, and - a shift in bits */ - int shift = 0; - int bufx = 0; - buffer[0].message = 0; - buffer[0].timestamp = when; - - while (1) { - /* insert next byte into buffer */ - buffer[bufx].message |= ((*msg) << shift); - shift += 8; - if (*msg++ == MIDI_EOX) break; - if (shift == 32) { - shift = 0; - bufx++; - if (bufx == buffer_size) { - PmError err = Pm_Write(stream, buffer, buffer_size); - /* note: Pm_Write has already called errmsg() */ - if (err) return err; - /* prepare to fill another buffer */ - bufx = 0; - buffer_size = BUFLEN; - /* optimization: maybe we can just copy bytes */ - if (midi->fill_base) { - PmError err; - while (*(midi->fill_offset_ptr) < midi->fill_length) { - midi->fill_base[(*midi->fill_offset_ptr)++] = *msg; - if (*msg++ == MIDI_EOX) { - err = pm_end_sysex(midi); - if (err != pmNoError) return pm_errmsg(err); - goto end_of_sysex; - } - } - /* I thought that I could do a pm_Write here and - * change this if to a loop, avoiding calls in Pm_Write - * to the slower write_byte, but since - * sysex_in_progress is true, this will not flush - * the buffer, and we'll infinite loop: */ - /* err = Pm_Write(stream, buffer, 0); - if (err) return err; */ - /* instead, the way this works is that Pm_Write calls - * write_byte on 4 bytes. The first, since the buffer - * is full, will flush the buffer and allocate a new - * one. This primes the buffer so - * that we can return to the loop above and fill it - * efficiently without a lot of function calls. - */ - buffer_size = 1; /* get another message started */ - } - } - buffer[bufx].message = 0; - buffer[bufx].timestamp = when; - } - /* keep inserting bytes until you find MIDI_EOX */ - } -end_of_sysex: - /* we're finished sending full buffers, but there may - * be a partial one left. - */ - if (shift != 0) bufx++; /* add partial message to buffer len */ - if (bufx) { /* bufx is number of PmEvents to send from buffer */ - PmError err = Pm_Write(stream, buffer, bufx); - if (err) return err; - } - return pmNoError; -} - - - -PMEXPORT PmError Pm_OpenInput(PortMidiStream** stream, - PmDeviceID inputDevice, - void *inputDriverInfo, - int32_t bufferSize, - PmTimeProcPtr time_proc, - void *time_info) -{ - PmInternal *midi; - PmError err = pmNoError; - pm_hosterror = FALSE; - *stream = NULL; - - /* arg checking */ - if (inputDevice < 0 || inputDevice >= pm_descriptor_index) - err = pmInvalidDeviceId; - else if (!descriptors[inputDevice].pub.input) - err = pmInvalidDeviceId; - else if(descriptors[inputDevice].pub.opened) - err = pmInvalidDeviceId; - - if (err != pmNoError) - goto error_return; - - /* create portMidi internal data */ - midi = (PmInternal *) pm_alloc(sizeof(PmInternal)); - *stream = midi; - if (!midi) { - err = pmInsufficientMemory; - goto error_return; - } - midi->device_id = inputDevice; - midi->write_flag = FALSE; - midi->time_proc = time_proc; - midi->time_info = time_info; - /* windows adds timestamps in the driver and these are more accurate than - using a time_proc, so do not automatically provide a time proc. Non-win - implementations may want to provide a default time_proc in their - system-specific midi_out_open() method. - */ - if (bufferSize <= 0) bufferSize = 256; /* default buffer size */ - midi->queue = Pm_QueueCreate(bufferSize, (int32_t) sizeof(PmEvent)); - if (!midi->queue) { - /* free portMidi data */ - *stream = NULL; - pm_free(midi); - err = pmInsufficientMemory; - goto error_return; - } - midi->buffer_len = bufferSize; /* portMidi input storage */ - midi->latency = 0; /* not used */ - midi->sysex_in_progress = FALSE; - midi->sysex_message = 0; - midi->sysex_message_count = 0; - midi->filters = PM_FILT_ACTIVE; - midi->channel_mask = 0xFFFF; - midi->sync_time = 0; - midi->first_message = TRUE; - midi->dictionary = descriptors[inputDevice].dictionary; - midi->fill_base = NULL; - midi->fill_offset_ptr = NULL; - midi->fill_length = 0; - descriptors[inputDevice].internalDescriptor = midi; - /* open system dependent input device */ - err = (*midi->dictionary->open)(midi, inputDriverInfo); - if (err) { - *stream = NULL; - descriptors[inputDevice].internalDescriptor = NULL; - /* free portMidi data */ - Pm_QueueDestroy(midi->queue); - pm_free(midi); - } else { - /* portMidi input open successful */ - descriptors[inputDevice].pub.opened = TRUE; - } -error_return: - /* note: if there is a pmHostError, it is the responsibility - * of the system-dependent code (*midi->dictionary->open)() - * to set pm_hosterror and pm_hosterror_text - */ - return pm_errmsg(err); -} - - -PMEXPORT PmError Pm_OpenOutput(PortMidiStream** stream, - PmDeviceID outputDevice, - void *outputDriverInfo, - int32_t bufferSize, - PmTimeProcPtr time_proc, - void *time_info, - int32_t latency ) -{ - PmInternal *midi; - PmError err = pmNoError; - pm_hosterror = FALSE; - *stream = NULL; - - /* arg checking */ - if (outputDevice < 0 || outputDevice >= pm_descriptor_index) - err = pmInvalidDeviceId; - else if (!descriptors[outputDevice].pub.output) - err = pmInvalidDeviceId; - else if (descriptors[outputDevice].pub.opened) - err = pmInvalidDeviceId; - if (err != pmNoError) - goto error_return; - - /* create portMidi internal data */ - midi = (PmInternal *) pm_alloc(sizeof(PmInternal)); - *stream = midi; - if (!midi) { - err = pmInsufficientMemory; - goto error_return; - } - midi->device_id = outputDevice; - midi->write_flag = TRUE; - midi->time_proc = time_proc; - /* if latency > 0, we need a time reference. If none is provided, - use PortTime library */ - if (time_proc == NULL && latency != 0) { - if (!Pt_Started()) - Pt_Start(1, 0, 0); - /* time_get does not take a parameter, so coerce */ - midi->time_proc = (PmTimeProcPtr) Pt_Time; - } - midi->time_info = time_info; - midi->buffer_len = bufferSize; - midi->queue = NULL; /* unused by output */ - /* if latency zero, output immediate (timestamps ignored) */ - /* if latency < 0, use 0 but don't return an error */ - if (latency < 0) latency = 0; - midi->latency = latency; - midi->sysex_in_progress = FALSE; - midi->sysex_message = 0; /* unused by output */ - midi->sysex_message_count = 0; /* unused by output */ - midi->filters = 0; /* not used for output */ - midi->channel_mask = 0xFFFF; - midi->sync_time = 0; - midi->first_message = TRUE; - midi->dictionary = descriptors[outputDevice].dictionary; - midi->fill_base = NULL; - midi->fill_offset_ptr = NULL; - midi->fill_length = 0; - descriptors[outputDevice].internalDescriptor = midi; - /* open system dependent output device */ - err = (*midi->dictionary->open)(midi, outputDriverInfo); - if (err) { - *stream = NULL; - descriptors[outputDevice].internalDescriptor = NULL; - /* free portMidi data */ - pm_free(midi); - } else { - /* portMidi input open successful */ - descriptors[outputDevice].pub.opened = TRUE; - } -error_return: - /* note: system-dependent code must set pm_hosterror and - * pm_hosterror_text if a pmHostError occurs - */ - return pm_errmsg(err); -} - - -PMEXPORT PmError Pm_SetChannelMask(PortMidiStream *stream, int mask) -{ - PmInternal *midi = (PmInternal *) stream; - PmError err = pmNoError; - - if (midi == NULL) - err = pmBadPtr; - else - midi->channel_mask = mask; - - return pm_errmsg(err); -} - - -PMEXPORT PmError Pm_SetFilter(PortMidiStream *stream, int32_t filters) { - PmInternal *midi = (PmInternal *) stream; - PmError err = pmNoError; - - /* arg checking */ - if (midi == NULL) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - else - midi->filters = filters; - return pm_errmsg(err); -} - - -PMEXPORT PmError Pm_Close( PortMidiStream *stream ) { - PmInternal *midi = (PmInternal *) stream; - PmError err = pmNoError; - - pm_hosterror = FALSE; - /* arg checking */ - if (midi == NULL) /* midi must point to something */ - err = pmBadPtr; - /* if it is an open device, the device_id will be valid */ - else if (midi->device_id < 0 || midi->device_id >= pm_descriptor_index) - err = pmBadPtr; - /* and the device should be in the opened state */ - else if (!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - - if (err != pmNoError) - goto error_return; - - /* close the device */ - err = (*midi->dictionary->close)(midi); - /* even if an error occurred, continue with cleanup */ - descriptors[midi->device_id].internalDescriptor = NULL; - descriptors[midi->device_id].pub.opened = FALSE; - if (midi->queue) Pm_QueueDestroy(midi->queue); - pm_free(midi); -error_return: - /* system dependent code must set pm_hosterror and - * pm_hosterror_text if a pmHostError occurs. - */ - return pm_errmsg(err); -} - -PmError Pm_Synchronize( PortMidiStream* stream ) { - PmInternal *midi = (PmInternal *) stream; - PmError err = pmNoError; - if (midi == NULL) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.output) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - else - midi->first_message = TRUE; - return err; -} - -PMEXPORT PmError Pm_Abort( PortMidiStream* stream ) { - PmInternal *midi = (PmInternal *) stream; - PmError err; - /* arg checking */ - if (midi == NULL) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.output) - err = pmBadPtr; - else if (!descriptors[midi->device_id].pub.opened) - err = pmBadPtr; - else - err = (*midi->dictionary->abort)(midi); - - if (err == pmHostError) { - midi->dictionary->host_error(midi, pm_hosterror_text, - PM_HOST_ERROR_MSG_LEN); - pm_hosterror = TRUE; - } - return pm_errmsg(err); -} - - - -/* pm_channel_filtered returns non-zero if the channel mask is blocking the current channel */ -#define pm_channel_filtered(status, mask) \ - ((((status) & 0xF0) != 0xF0) && (!(Pm_Channel((status) & 0x0F) & (mask)))) - - -/* The following two functions will checks to see if a MIDI message matches - the filtering criteria. Since the sysex routines only want to filter realtime messages, - we need to have separate routines. - */ - - -/* pm_realtime_filtered returns non-zero if the filter will kill the current message. - Note that only realtime messages are checked here. - */ -#define pm_realtime_filtered(status, filters) \ - ((((status) & 0xF0) == 0xF0) && ((1 << ((status) & 0xF)) & (filters))) - -/* - return ((status == MIDI_ACTIVE) && (filters & PM_FILT_ACTIVE)) - || ((status == MIDI_CLOCK) && (filters & PM_FILT_CLOCK)) - || ((status == MIDI_START) && (filters & PM_FILT_PLAY)) - || ((status == MIDI_STOP) && (filters & PM_FILT_PLAY)) - || ((status == MIDI_CONTINUE) && (filters & PM_FILT_PLAY)) - || ((status == MIDI_F9) && (filters & PM_FILT_F9)) - || ((status == MIDI_FD) && (filters & PM_FILT_FD)) - || ((status == MIDI_RESET) && (filters & PM_FILT_RESET)) - || ((status == MIDI_MTC) && (filters & PM_FILT_MTC)) - || ((status == MIDI_SONGPOS) && (filters & PM_FILT_SONG_POSITION)) - || ((status == MIDI_SONGSEL) && (filters & PM_FILT_SONG_SELECT)) - || ((status == MIDI_TUNE) && (filters & PM_FILT_TUNE)); -}*/ - - -/* pm_status_filtered returns non-zero if a filter will kill the current message, based on status. - Note that sysex and real time are not checked. It is up to the subsystem (winmm, core midi, alsa) - to filter sysex, as it is handled more easily and efficiently at that level. - Realtime message are filtered in pm_realtime_filtered. - */ -#define pm_status_filtered(status, filters) ((1 << (16 + ((status) >> 4))) & (filters)) - - -/* - return ((status == MIDI_NOTE_ON) && (filters & PM_FILT_NOTE)) - || ((status == MIDI_NOTE_OFF) && (filters & PM_FILT_NOTE)) - || ((status == MIDI_CHANNEL_AT) && (filters & PM_FILT_CHANNEL_AFTERTOUCH)) - || ((status == MIDI_POLY_AT) && (filters & PM_FILT_POLY_AFTERTOUCH)) - || ((status == MIDI_PROGRAM) && (filters & PM_FILT_PROGRAM)) - || ((status == MIDI_CONTROL) && (filters & PM_FILT_CONTROL)) - || ((status == MIDI_PITCHBEND) && (filters & PM_FILT_PITCHBEND)); - -} -*/ - -static void pm_flush_sysex(PmInternal *midi, PmTimestamp timestamp) -{ - PmEvent event; - - /* there may be nothing in the buffer */ - if (midi->sysex_message_count == 0) return; /* nothing to flush */ - - event.message = midi->sysex_message; - event.timestamp = timestamp; - /* copied from pm_read_short, avoids filtering */ - if (Pm_Enqueue(midi->queue, &event) == pmBufferOverflow) { - midi->sysex_in_progress = FALSE; - } - midi->sysex_message_count = 0; - midi->sysex_message = 0; -} - - -/* pm_read_short and pm_read_bytes - are the interface between system-dependent MIDI input handlers - and the system-independent PortMIDI code. - The input handler MUST obey these rules: - 1) all short input messages must be sent to pm_read_short, which - enqueues them to a FIFO for the application. - 2) each buffer of sysex bytes should be reported by calling pm_read_bytes - (which sets midi->sysex_in_progress). After the eox byte, - pm_read_bytes will clear sysex_in_progress - */ - -/* pm_read_short is the place where all input messages arrive from - system-dependent code such as pmwinmm.c. Here, the messages - are entered into the PortMidi input buffer. - */ -void pm_read_short(PmInternal *midi, PmEvent *event) -{ - int status; - /* arg checking */ - assert(midi != NULL); - /* midi filtering is applied here */ - status = Pm_MessageStatus(event->message); - if (!pm_status_filtered(status, midi->filters) - && (!is_real_time(status) || - !pm_realtime_filtered(status, midi->filters)) - && !pm_channel_filtered(status, midi->channel_mask)) { - /* if sysex is in progress and we get a status byte, it had - better be a realtime message or the starting SYSEX byte; - otherwise, we exit the sysex_in_progress state - */ - if (midi->sysex_in_progress && (status & MIDI_STATUS_MASK)) { - /* two choices: real-time or not. If it's real-time, then - * this should be delivered as a sysex byte because it is - * embedded in a sysex message - */ - if (is_real_time(status)) { - midi->sysex_message |= - (status << (8 * midi->sysex_message_count++)); - if (midi->sysex_message_count == 4) { - pm_flush_sysex(midi, event->timestamp); - } - } else { /* otherwise, it's not real-time. This interrupts - * a sysex message in progress */ - midi->sysex_in_progress = FALSE; - } - } else if (Pm_Enqueue(midi->queue, event) == pmBufferOverflow) { - midi->sysex_in_progress = FALSE; - } - } -} - -/* pm_read_bytes -- read one (partial) sysex msg from MIDI data */ -/* - * returns how many bytes processed - */ -unsigned int pm_read_bytes(PmInternal *midi, const unsigned char *data, - int len, PmTimestamp timestamp) -{ - int i = 0; /* index into data, must not be unsigned (!) */ - PmEvent event; - event.timestamp = timestamp; - assert(midi); - /* note that since buffers may not have multiples of 4 bytes, - * pm_read_bytes may be called in the middle of an outgoing - * 4-byte PortMidi message. sysex_in_progress indicates that - * a sysex has been sent but no eox. - */ - if (len == 0) return 0; /* sanity check */ - if (!midi->sysex_in_progress) { - while (i < len) { /* process all data */ - unsigned char byte = data[i++]; - if (byte == MIDI_SYSEX && - !pm_realtime_filtered(byte, midi->filters)) { - midi->sysex_in_progress = TRUE; - i--; /* back up so code below will get SYSEX byte */ - break; /* continue looping below to process msg */ - } else if (byte == MIDI_EOX) { - midi->sysex_in_progress = FALSE; - return i; /* done with one message */ - } else if (byte & MIDI_STATUS_MASK) { - /* We're getting MIDI but no sysex in progress. - * Either the SYSEX status byte was dropped or - * the message was filtered. Drop the data, but - * send any embedded realtime bytes. - */ - /* assume that this is a real-time message: - * it is an error to pass non-real-time messages - * to pm_read_bytes - */ - event.message = byte; - pm_read_short(midi, &event); - } - } /* all bytes in the buffer are processed */ - } - /* Now, i<len implies sysex_in_progress. If sysex_in_progress - * becomes false in the loop, there must have been an overflow - * and we can just drop all remaining bytes - */ - while (i < len && midi->sysex_in_progress) { - if (midi->sysex_message_count == 0 && i <= len - 4 && - ((event.message = (((PmMessage) data[i]) | - (((PmMessage) data[i+1]) << 8) | - (((PmMessage) data[i+2]) << 16) | - (((PmMessage) data[i+3]) << 24))) & - 0x80808080) == 0) { /* all data, no status */ - if (Pm_Enqueue(midi->queue, &event) == pmBufferOverflow) { - midi->sysex_in_progress = FALSE; - } - i += 4; - } else { - while (i < len) { - /* send one byte at a time */ - unsigned char byte = data[i++]; - if (is_real_time(byte) && - pm_realtime_filtered(byte, midi->filters)) { - continue; /* real-time data is filtered, so omit */ - } - midi->sysex_message |= - (byte << (8 * midi->sysex_message_count++)); - if (byte == MIDI_EOX) { - midi->sysex_in_progress = FALSE; - pm_flush_sysex(midi, event.timestamp); - return i; - } else if (midi->sysex_message_count == 4) { - pm_flush_sysex(midi, event.timestamp); - /* after handling at least one non-data byte - * and reaching a 4-byte message boundary, - * resume trying to send 4 at a time in outer loop - */ - break; - } - } - } - } - return i; -} - - |