This patch adds a new options to amidi tool to add a delay (in milliseconds) to each SysEx message.
This is very useful when sending firmware updates to a remote device via SysEx or any other use that requires this delay in between messages.
Signed-off-by: Felipe F. Tonello eu@felipetonello.com --- amidi/amidi.1 | 14 ++++++++++++++ amidi/amidi.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++----- 2 files changed, 67 insertions(+), 5 deletions(-)
diff --git a/amidi/amidi.1 b/amidi/amidi.1 index 86beb27a1e3b..4ca2164788f1 100644 --- a/amidi/amidi.1 +++ b/amidi/amidi.1 @@ -120,6 +120,12 @@ received MIDI commands. Does not ignore Clock bytes (F8h) when saving or printing received MIDI commands.
+.TP +.I -D, --delay=mseconds +Adds a delay in between each SysEx message sent to a device. It is +useful when sending firmware updates via SysEx messages to a remote +device. + .SH EXAMPLES
.TP @@ -130,6 +136,14 @@ to port .I hw:0.
.TP +.B amidi -p hw:1,0,0 -s firmware.syx -D 100 +will send the MIDI commands in +.I firmware.syx +to port +.I hw:1,0,0 +with 100 milliseconds delay in between each SysEx message. + +.TP .B amidi -S 'F0 43 10 4C 00 00 7E 00 F7' sends an XG Reset to the default port.
diff --git a/amidi/amidi.c b/amidi/amidi.c index c20512cc96a7..d0dbb322f80a 100644 --- a/amidi/amidi.c +++ b/amidi/amidi.c @@ -52,6 +52,7 @@ static int receive_file; static int dump; static float timeout; static int stop; +static int delay; static snd_rawmidi_t *input, **inputp; static snd_rawmidi_t *output, **outputp;
@@ -82,7 +83,8 @@ static void usage(void) "-t, --timeout=seconds exits when no data has been received\n" " for the specified duration\n" "-a, --active-sensing include active sensing bytes\n" - "-c, --clock include clock bytes\n"); + "-c, --clock include clock bytes\n" + "-D, --delay=mseconds delay in between each SysEx message\n"); }
static void version(void) @@ -411,7 +413,7 @@ static void add_send_hex_data(const char *str)
int main(int argc, char *argv[]) { - static const char short_options[] = "hVlLp:s:r:S::dt:ac"; + static const char short_options[] = "hVlLp:s:r:S::dt:acD:"; static const struct option long_options[] = { {"help", 0, NULL, 'h'}, {"version", 0, NULL, 'V'}, @@ -425,6 +427,7 @@ int main(int argc, char *argv[]) {"timeout", 1, NULL, 't'}, {"active-sensing", 0, NULL, 'a'}, {"clock", 0, NULL, 'c'}, + {"delay", 1, NULL, 'D'}, { } }; int c, err, ok = 0; @@ -474,6 +477,9 @@ int main(int argc, char *argv[]) case 'c': ignore_clock = 0; break; + case 'D': + delay = atoi(optarg); + break; default: error("Try `amidi --help' for more information."); return 1; @@ -549,9 +555,51 @@ int main(int argc, char *argv[]) error("cannot set blocking mode: %s", snd_strerror(err)); goto _exit; } - if ((err = snd_rawmidi_write(output, send_data, send_data_length)) < 0) { - error("cannot send data: %s", snd_strerror(err)); - goto _exit; + if (!delay) { + if ((err = snd_rawmidi_write(output, send_data, send_data_length)) < 0) { + error("cannot send data: %s", snd_strerror(err)); + return err; + } + } else { + char *data = send_data; + size_t buffer_size; + snd_rawmidi_params_t *param; + snd_rawmidi_status_t *st; + + snd_rawmidi_status_malloc(&st); + + snd_rawmidi_params_malloc(¶m); + snd_rawmidi_params_current(output, param); + buffer_size = snd_rawmidi_params_get_buffer_size(param); + snd_rawmidi_params_free(param); + + while (data < (send_data + send_data_length)) { + int len = send_data + send_data_length - data; + char *temp; + + if (data > send_data) { + snd_rawmidi_status(output, st); + do { + /* 320 µs per byte as noted in Page 1 of MIDI spec */ + usleep((buffer_size - snd_rawmidi_status_get_avail(st)) * 320); + snd_rawmidi_status(output, st); + } while(snd_rawmidi_status_get_avail(st) < buffer_size); + usleep(delay * 1000); + } + + /* find end of SysEx */ + if ((temp = memchr(data, 0xf7, len)) != NULL) + len = temp - data + 1; + + if ((err = snd_rawmidi_write(output, data, len)) < 0) { + error("cannot send data: %s", snd_strerror(err)); + return err; + } + + data += len; + } + + snd_rawmidi_status_free(st); } }