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author | px4dev <px4@purgatory.org> | 2012-08-11 11:27:07 -0700 |
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committer | px4dev <px4@purgatory.org> | 2012-08-11 11:27:07 -0700 |
commit | 65aec69705069d952c1b3c8d76fda752d7abe539 (patch) | |
tree | 3c4fa63b058dce525b061c76985c1c4c0955bc32 /apps/systemlib/mixer | |
parent | 42ace38e3199670c05e5888933aaedfc25b03265 (diff) | |
download | px4-firmware-65aec69705069d952c1b3c8d76fda752d7abe539.tar.gz px4-firmware-65aec69705069d952c1b3c8d76fda752d7abe539.tar.bz2 px4-firmware-65aec69705069d952c1b3c8d76fda752d7abe539.zip |
Syntax change to improve readability; output scalers are now labelled O: instead of looking like control scalers.
Make mixer terminology more consistent; mixer inputs are 'controls'.
Diffstat (limited to 'apps/systemlib/mixer')
-rw-r--r-- | apps/systemlib/mixer/mixer.cpp | 22 | ||||
-rw-r--r-- | apps/systemlib/mixer/mixer_group.cpp | 95 |
2 files changed, 84 insertions, 33 deletions
diff --git a/apps/systemlib/mixer/mixer.cpp b/apps/systemlib/mixer/mixer.cpp index 5184c2f13..eaa1d60ed 100644 --- a/apps/systemlib/mixer/mixer.cpp +++ b/apps/systemlib/mixer/mixer.cpp @@ -151,15 +151,15 @@ SimpleMixer::mix(float *outputs, unsigned space) if (space < 1) return 0; - for (unsigned i = 0; i < _info->input_count; i++) { + for (unsigned i = 0; i < _info->control_count; i++) { float input; _control_cb(_cb_handle, - _info->inputs[i].control_group, - _info->inputs[i].control_index, + _info->controls[i].control_group, + _info->controls[i].control_index, input); - sum += scale(_info->inputs[i].scaler, input); + sum += scale(_info->controls[i].scaler, input); } *outputs = scale(_info->output_scaler, sum); return 1; @@ -168,8 +168,8 @@ SimpleMixer::mix(float *outputs, unsigned space) void SimpleMixer::groups_required(uint32_t &groups) { - for (unsigned i = 0; i < _info->input_count; i++) - groups |= 1 << _info->inputs[i].control_group; + for (unsigned i = 0; i < _info->control_count; i++) + groups |= 1 << _info->controls[i].control_group; } int @@ -180,7 +180,7 @@ SimpleMixer::check() /* sanity that presumes that a mixer includes a control no more than once */ /* max of 32 groups due to groups_required API */ - if (_info->input_count > 32) + if (_info->control_count > 32) return -2; /* validate the output scaler */ @@ -190,18 +190,18 @@ SimpleMixer::check() return ret; /* validate input scalers */ - for (unsigned i = 0; i < _info->input_count; i++) { + for (unsigned i = 0; i < _info->control_count; i++) { /* verify that we can fetch the control */ if (_control_cb(_cb_handle, - _info->inputs[i].control_group, - _info->inputs[i].control_index, + _info->controls[i].control_group, + _info->controls[i].control_index, junk) != 0) { return -3; } /* validate the scaler */ - ret = scale_check(_info->inputs[i].scaler); + ret = scale_check(_info->controls[i].scaler); if (ret != 0) return (10 * i + ret); diff --git a/apps/systemlib/mixer/mixer_group.cpp b/apps/systemlib/mixer/mixer_group.cpp index 72a2ff3e5..11894e02b 100644 --- a/apps/systemlib/mixer/mixer_group.cpp +++ b/apps/systemlib/mixer/mixer_group.cpp @@ -53,6 +53,9 @@ #include "mixer.h" +#define debug(fmt, args...) do { } while(0) +//#define debug(fmt, args...) do { printf("[mixer] " fmt "\n", ##args); } while(0) + namespace { @@ -76,8 +79,10 @@ mixer_getline(int fd, char *line, unsigned maxlen) ret = read(fd, &c, 1); /* on error or EOF, return same */ - if (ret <= 0) + if (ret <= 0) { + debug("read: EOF"); return ret; + } /* ignore carriage returns */ if (c == '\r') @@ -94,6 +99,7 @@ mixer_getline(int fd, char *line, unsigned maxlen) /* terminate line as string and return */ *p = '\0'; + debug("read: '%s'", line); return 1; } @@ -105,17 +111,42 @@ mixer_getline(int fd, char *line, unsigned maxlen) } /** - * Parse a scaler from the buffer. + * Parse an output scaler from the buffer. */ static int -mixer_parse_scaler(const char *buf, mixer_scaler_s &scaler, uint8_t &control_group, uint8_t &control_index) +mixer_parse_output_scaler(const char *buf, mixer_scaler_s &scaler) +{ + int s[5]; + + if (sscanf(buf, "O: %d %d %d %d %d", + &s[0], &s[1], &s[2], &s[3], &s[4]) != 5) { + debug("scaler parse failed on '%s'", buf); + return -1; + } + + scaler.negative_scale = s[0] / 10000.0f; + scaler.positive_scale = s[1] / 10000.0f; + scaler.offset = s[2] / 10000.0f; + scaler.min_output = s[3] / 10000.0f; + scaler.max_output = s[4] / 10000.0f; + + return 0; +} + +/** + * Parse a control scaler from the buffer. + */ +static int +mixer_parse_control_scaler(const char *buf, mixer_scaler_s &scaler, uint8_t &control_group, uint8_t &control_index) { unsigned u[2]; int s[5]; if (sscanf(buf, "S: %u %u %d %d %d %d %d", - &u[0], &u[1], &s[0], &s[1], &s[2], &s[3], &s[4]) != 7) + &u[0], &u[1], &s[0], &s[1], &s[2], &s[3], &s[4]) != 7) { + debug("scaler parse failed on '%s'", buf); return -1; + } control_group = u[0]; control_index = u[1]; @@ -133,7 +164,6 @@ mixer_load_simple(Mixer::ControlCallback control_cb, uintptr_t cb_handle, int fd { mixer_simple_s *mixinfo = nullptr; char buf[60]; - uint8_t control_group, control_index; int ret; /* let's assume we're going to read a simple mixer */ @@ -141,22 +171,30 @@ mixer_load_simple(Mixer::ControlCallback control_cb, uintptr_t cb_handle, int fd /* first, get the output scaler */ ret = mixer_getline(fd, buf, sizeof(buf)); - if (ret < 1) + if (ret < 1) { + debug("failed reading for output scaler"); goto fail; - if (mixer_parse_scaler(buf, mixinfo->output_scaler, control_group, control_index)) + } + if (mixer_parse_output_scaler(buf, mixinfo->output_scaler)) { + debug("failed parsing output scaler"); goto fail; + } /* now get any inputs */ for (unsigned i = 0; i < inputs; i++) { ret = mixer_getline(fd, buf, sizeof(buf)); - if (ret < 1) + if (ret < 1) { + debug("failed reading for control scaler"); goto fail; - if (mixer_parse_scaler(buf, - mixinfo->inputs[i].scaler, - mixinfo->inputs[i].control_group, - mixinfo->inputs[i].control_index)) { + } + if (mixer_parse_control_scaler(buf, + mixinfo->controls[i].scaler, + mixinfo->controls[i].control_group, + mixinfo->controls[i].control_index)) { + debug("failed parsing control scaler"); goto fail; } + debug("got control %d", i); } /* XXX should be a factory that validates the mixinfo ... */ @@ -172,27 +210,32 @@ mixer_load(Mixer::ControlCallback control_cb, uintptr_t cb_handle, int fd, Mixer { int ret; char buf[60]; - unsigned scalers; + unsigned inputs; ret = mixer_getline(fd, buf, sizeof(buf)); /* end of file or error ?*/ - if (ret < 1) + if (ret < 1) { + debug("getline %d", ret); return ret; + } /* slot is empty - allocate a null mixer */ if (buf[0] == 'Z') { + debug("got null mixer"); mixer = new NullMixer(); - return 0; + return 1; } /* is it a simple mixer? */ - if (sscanf(buf, "M: %u", &scalers) == 1) { - mixer = mixer_load_simple(control_cb, cb_handle, fd, scalers); - return (mixer == nullptr) ? -1 : 0; + if (sscanf(buf, "M: %u", &inputs) == 1) { + debug("got simple mixer with %d inputs", inputs); + mixer = mixer_load_simple(control_cb, cb_handle, fd, inputs); + return (mixer == nullptr) ? -1 : 1; } /* we don't recognise the mixer type */ + debug("unrecognized mixer type '%c'", buf[0]); return -1; } @@ -260,10 +303,12 @@ MixerGroup::load_from_file(const char *path) return -1; int fd = open(path, O_RDONLY); - if (fd < 0) + if (fd < 0) { + debug("failed to open %s", path); return -1; + } - for (;;) { + for (unsigned count = 0;; count++) { int result; Mixer *mixer; @@ -273,13 +318,19 @@ MixerGroup::load_from_file(const char *path) mixer); /* error? */ - if (result < 0) + if (result < 0) { + debug("error"); return -1; + } /* EOF or error */ - if (result < 1) + if (result < 1) { + printf("[mixer] loaded %u mixers\n", count); + debug("EOF"); break; + } + debug("loaded mixer %p", mixer); add_mixer(mixer); } |