mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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266 lines
8.8 KiB
C
266 lines
8.8 KiB
C
/** RAW IO format
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <villas/sample.h>
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#include <villas/plugin.h>
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#include <villas/utils.h>
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#include <villas/io.h>
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#include <villas/formats/raw.h>
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#include <villas/compat.h>
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/** Convert float to host byte order */
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#define SWAP_FLT_TOH(o, n) ({ \
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union { float f; uint32_t i; } x = { .f = n }; \
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x.i = (o) ? be32toh(x.i) : le32toh(x.i); x.f; \
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})
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/** Convert double to host byte order */
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#define SWAP_DBL_TOH(o, n) ({ \
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union { float f; uint64_t i; } x = { .f = n }; \
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x.i = (o) ? be64toh(x.i) : le64toh(x.i); x.f; \
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})
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/** Convert float to big/little endian byte order */
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#define SWAP_FLT_TOE(o, n) ({ \
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union { float f; uint32_t i; } x = { .f = n }; \
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x.i = (o) ? htobe32(x.i) : htole32(x.i); x.f; \
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})
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/** Convert double to big/little endian byte order */
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#define SWAP_DBL_TOE(o, n) ({ \
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union { double f; uint64_t i; } x = { .f = n }; \
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x.i = (o) ? htobe64(x.i) : htole64(x.i); x.f; \
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})
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/** Convert integer of varying width to host byte order */
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#define SWAP_INT_TOH(o, b, n) (o ? be ## b ## toh(n) : le ## b ## toh(n))
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/** Convert integer of varying width to big/little endian byte order */
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#define SWAP_INT_TOE(o, b, n) (o ? htobe ## b (n) : htole ## b (n))
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int raw_sprint(struct io *io, char *buf, size_t len, size_t *wbytes, struct sample *smps[], unsigned cnt)
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{
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int i, o = 0;
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size_t nlen;
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int8_t *i8 = (void *) buf;
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int16_t *i16 = (void *) buf;
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int32_t *i32 = (void *) buf;
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int64_t *i64 = (void *) buf;
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float *f32 = (void *) buf;
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double *f64 = (void *) buf;
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int bits = 1 << (io->flags >> 24);
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for (i = 0; i < cnt; i++) {
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nlen = (smps[i]->length + o + (io->flags & RAW_FAKE) ? 3 : 0) * (bits / 8);
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if (nlen >= len)
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break;
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/* First three values are sequence, seconds and nano-seconds timestamps */
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if (io->flags & RAW_FAKE) {
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switch (bits) {
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case 32:
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i32[o++] = SWAP_INT_TOE(io->flags & RAW_BE_HDR, 32, smps[i]->sequence);
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i32[o++] = SWAP_INT_TOE(io->flags & RAW_BE_HDR, 32, smps[i]->ts.origin.tv_sec);
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i32[o++] = SWAP_INT_TOE(io->flags & RAW_BE_HDR, 32, smps[i]->ts.origin.tv_nsec);
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break;
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case 64:
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i64[o++] = SWAP_INT_TOE(io->flags & RAW_BE_HDR, 64, smps[i]->sequence);
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i64[o++] = SWAP_INT_TOE(io->flags & RAW_BE_HDR, 64, smps[i]->ts.origin.tv_sec);
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i64[o++] = SWAP_INT_TOE(io->flags & RAW_BE_HDR, 64, smps[i]->ts.origin.tv_nsec);
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break;
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}
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}
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enum raw_format {
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RAW_FORMAT_INT,
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RAW_FORMAT_FLT
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};
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for (int j = 0; j < smps[i]->length; j++) {
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enum sample_data_format smp_fmt;
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enum raw_format raw_fmt;
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union { double f; uint64_t i; } val;
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if (io->flags & RAW_AUTO)
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raw_fmt = smps[i]->format & (1 << i) ? RAW_FORMAT_INT : RAW_FORMAT_FLT;
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else if (io->flags & RAW_FLT)
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raw_fmt = RAW_FORMAT_FLT;
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else
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raw_fmt = RAW_FORMAT_INT;
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smp_fmt = sample_get_data_format(smps[i], j);
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switch (raw_fmt) {
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case RAW_FORMAT_FLT:
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switch (smp_fmt) {
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case SAMPLE_DATA_FORMAT_INT: val.f = smps[i]->data[j].i; break;
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case SAMPLE_DATA_FORMAT_FLOAT: val.f = smps[i]->data[j].f; break;
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default: val.f = -1; break;
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}
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switch (bits) {
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case 32: f32[o++] = SWAP_FLT_TOE(io->flags & RAW_BE_FLT, val.f); break;
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case 64: f64[o++] = SWAP_DBL_TOE(io->flags & RAW_BE_FLT, val.f); break;
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}
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break;
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case RAW_FORMAT_INT:
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switch (smp_fmt) {
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case SAMPLE_DATA_FORMAT_INT: val.i = smps[i]->data[j].i; break;
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case SAMPLE_DATA_FORMAT_FLOAT: val.i = smps[i]->data[j].f; break;
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default: val.i = -1; break;
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}
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switch (bits) {
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case 8: i8 [o++] = val.i; break;
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case 16: i16[o++] = SWAP_INT_TOE(io->flags & RAW_BE_INT, 16, val.i); break;
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case 32: i32[o++] = SWAP_INT_TOE(io->flags & RAW_BE_INT, 32, val.i); break;
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case 64: i64[o++] = SWAP_INT_TOE(io->flags & RAW_BE_INT, 64, val.i); break;
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}
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break;
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}
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}
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}
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if (wbytes)
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*wbytes = o * (bits / 8);
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return i;
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}
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int raw_sscan(struct io *io, char *buf, size_t len, size_t *rbytes, struct sample *smps[], unsigned cnt)
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{
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/* The raw format can not encode multiple samples in one buffer
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* as there is no support for framing. */
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struct sample *smp = smps[0];
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int8_t *i8 = (void *) buf;
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int16_t *i16 = (void *) buf;
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int32_t *i32 = (void *) buf;
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int64_t *i64 = (void *) buf;
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float *f32 = (void *) buf;
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double *f64 = (void *) buf;
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int off, bits = 1 << (io->flags >> 24);
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smp->length = len / (bits / 8);
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if (io->flags & RAW_FAKE) {
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off = 3;
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if (smp->length < off) {
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warn("Received a packet with no fake header. Skipping...");
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return 0;
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}
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smp->length -= off;
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switch (bits) {
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case 32:
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smp->sequence = SWAP_INT_TOH(io->flags & RAW_BE_HDR, 32, i32[0]);
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smp->ts.origin.tv_sec = SWAP_INT_TOH(io->flags & RAW_BE_HDR, 32, i32[1]);
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smp->ts.origin.tv_nsec = SWAP_INT_TOH(io->flags & RAW_BE_HDR, 32, i32[2]);
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break;
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case 64:
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smp->sequence = SWAP_INT_TOH(io->flags & RAW_BE_HDR, 64, i64[0]);
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smp->ts.origin.tv_sec = SWAP_INT_TOH(io->flags & RAW_BE_HDR, 64, i64[1]);
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smp->ts.origin.tv_nsec = SWAP_INT_TOH(io->flags & RAW_BE_HDR, 64, i64[2]);
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break;
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}
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smp->flags = SAMPLE_HAS_SEQUENCE | SAMPLE_HAS_ORIGIN;
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}
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else {
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off = 0;
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smp->flags = 0;
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smp->sequence = 0;
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smp->ts.origin.tv_sec = 0;
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smp->ts.origin.tv_nsec = 0;
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}
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if (smp->length > smp->capacity) {
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warn("Received more values than supported: length=%u, capacity=%u", smp->length, smp->capacity);
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smp->length = smp->capacity;
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}
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for (int i = 0; i < smp->length; i++) {
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enum sample_data_format smp_fmt = io->flags & RAW_FLT ? SAMPLE_DATA_FORMAT_FLOAT
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: SAMPLE_DATA_FORMAT_INT;
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sample_set_data_format(smp, i, smp_fmt);
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switch (smp_fmt) {
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case SAMPLE_DATA_FORMAT_FLOAT:
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switch (bits) {
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case 32: smp->data[i].f = SWAP_FLT_TOH(io->flags & RAW_BE_FLT, f32[i+off]); break;
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case 64: smp->data[i].f = SWAP_DBL_TOH(io->flags & RAW_BE_FLT, f64[i+off]); break;
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}
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break;
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case SAMPLE_DATA_FORMAT_INT:
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switch (bits) {
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case 8: smp->data[i].i = i8[i]; break;
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case 16: smp->data[i].i = (int16_t) SWAP_INT_TOH(io->flags & RAW_BE_INT, 16, i16[i+off]); break;
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case 32: smp->data[i].i = (int32_t) SWAP_INT_TOH(io->flags & RAW_BE_INT, 32, i32[i+off]); break;
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case 64: smp->data[i].i = (int64_t) SWAP_INT_TOH(io->flags & RAW_BE_INT, 64, i64[i+off]); break;
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}
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break;
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}
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}
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if (rbytes)
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*rbytes = len;
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return 1;
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}
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#define REGISTER_FORMAT_RAW(i, n, d, f) \
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static struct plugin i = { \
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.name = n, \
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.description = d, \
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.type = PLUGIN_TYPE_FORMAT, \
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.format = { \
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.flags = f | FORMAT_TYPE_BINARY,\
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.sprint = raw_sprint, \
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.sscan = raw_sscan \
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} \
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}; \
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REGISTER_PLUGIN(& i);
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/* Feel free to add additional format identifiers here to suit your needs */
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REGISTER_FORMAT_RAW(p_f32, "raw.flt32", "Raw single precision floating point", RAW_32 | RAW_FLT)
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REGISTER_FORMAT_RAW(p_f64, "raw.flt64", "Raw double precision floating point", RAW_64 | RAW_FLT)
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REGISTER_FORMAT_RAW(p_i8, "raw.int8", "Raw 8 bit, signed integer", RAW_8)
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REGISTER_FORMAT_RAW(p_i16be, "raw.int16.be", "Raw 16 bit, signed integer, big endian byte-order", RAW_16 | RAW_BE)
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REGISTER_FORMAT_RAW(p_i16le, "raw.int16.le", "Raw 16 bit, signed integer, little endian byte-order", RAW_16)
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REGISTER_FORMAT_RAW(p_i32be, "raw.int32.be", "Raw 32 bit, signed integer, big endian byte-order", RAW_32 | RAW_BE)
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REGISTER_FORMAT_RAW(p_i32le, "raw.int32.le", "Raw 32 bit, signed integer, little endian byte-order", RAW_32)
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REGISTER_FORMAT_RAW(p_i64be, "raw.int64.be", "Raw 64 bit, signed integer, bit endian byte-order", RAW_64 | RAW_BE)
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REGISTER_FORMAT_RAW(p_i64le, "raw.int64.le", "Raw 64 bit, signed integer, little endian byte-order", RAW_64)
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REGISTER_FORMAT_RAW(p_gtnet, "gtnet", "RTDS GTNET", RAW_32 | RAW_FLT | RAW_BE)
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REGISTER_FORMAT_RAW(p_gtnef, "gtnet.fake", "RTDS GTNET with fake header", RAW_32 | RAW_FLT | RAW_BE | RAW_FAKE)
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