X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=output%2Fvcd.c;h=f90db498e5710d1d595bfab3c5b27818c7b2d202;hb=HEAD;hp=87f8049603d6ff3733c91643e5d67188e72110ae;hpb=6cb45d96c802190aef675e96c6037ee6ab0a8622;p=libsigrok.git diff --git a/output/vcd.c b/output/vcd.c deleted file mode 100644 index 87f80496..00000000 --- a/output/vcd.c +++ /dev/null @@ -1,269 +0,0 @@ -/* - * This file is part of the libsigrok project. - * - * Copyright (C) 2010 Uwe Hermann - * Copyright (C) 2013 Bert Vermeulen - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include -#include "config.h" /* Needed for PACKAGE and others. */ -#include "libsigrok.h" -#include "libsigrok-internal.h" - -#define LOG_PREFIX "output/vcd" - -struct context { - int num_enabled_channels; - GArray *channelindices; - uint8_t *prevsample; - gboolean header_done; - int period; - int *channel_index; - uint64_t samplerate; - uint64_t samplecount; -}; - -static const char *const vcd_header_comment = - "$comment\n Acquisition with %d/%d channels at %s\n$end\n"; - -static int init(struct sr_output *o) -{ - struct context *ctx; - struct sr_channel *ch; - GSList *l; - int num_enabled_channels, i; - - num_enabled_channels = 0; - for (l = o->sdi->channels; l; l = l->next) { - ch = l->data; - if (ch->type != SR_CHANNEL_LOGIC) - continue; - if (!ch->enabled) - continue; - num_enabled_channels++; - } - if (num_enabled_channels > 94) { - sr_err("VCD only supports 94 channels."); - return SR_ERR; - } - - ctx = g_malloc0(sizeof(struct context)); - o->internal = ctx; - ctx->num_enabled_channels = num_enabled_channels; - ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels); - - /* Once more to map the enabled channels. */ - for (i = 0, l = o->sdi->channels; l; l = l->next) { - ch = l->data; - if (ch->type != SR_CHANNEL_LOGIC) - continue; - if (!ch->enabled) - continue; - ctx->channel_index[i++] = ch->index; - } - - return SR_OK; -} - -static GString *gen_header(struct sr_output *o) -{ - struct context *ctx; - struct sr_channel *ch; - GVariant *gvar; - GString *header; - GSList *l; - time_t t; - int num_channels, i; - char *samplerate_s, *frequency_s, *timestamp; - - ctx = o->internal; - header = g_string_sized_new(512); - num_channels = g_slist_length(o->sdi->channels); - - /* timestamp */ - t = time(NULL); - timestamp = g_strdup(ctime(&t)); - timestamp[strlen(timestamp)-1] = 0; - g_string_printf(header, "$date %s $end\n", timestamp); - g_free(timestamp); - - /* generator */ - g_string_append_printf(header, "$version %s %s $end\n", - PACKAGE, PACKAGE_VERSION); - g_string_append_printf(header, "$comment\n Acquisition with " - "%d/%d channels", ctx->num_enabled_channels, num_channels); - - if (ctx->samplerate == 0) { - if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, - &gvar) == SR_OK) { - ctx->samplerate = g_variant_get_uint64(gvar); - g_variant_unref(gvar); - } - } - if (ctx->samplerate != 0) { - samplerate_s = sr_samplerate_string(ctx->samplerate); - g_string_append_printf(header, " at %s", samplerate_s); - g_free(samplerate_s); - } - g_string_append_printf(header, "\n$end\n"); - - /* timescale */ - /* VCD can only handle 1/10/100 (s - fs), so scale up first */ - if (ctx->samplerate > SR_MHZ(1)) - ctx->period = SR_GHZ(1); - else if (ctx->samplerate > SR_KHZ(1)) - ctx->period = SR_MHZ(1); - else - ctx->period = SR_KHZ(1); - frequency_s = sr_period_string(ctx->period); - g_string_append_printf(header, "$timescale %s $end\n", frequency_s); - g_free(frequency_s); - - /* scope */ - g_string_append_printf(header, "$scope module %s $end\n", PACKAGE); - - /* Wires / channels */ - for (i = 0, l = o->sdi->channels; l; l = l->next, i++) { - ch = l->data; - if (ch->type != SR_CHANNEL_LOGIC) - continue; - if (!ch->enabled) - continue; - g_string_append_printf(header, "$var wire 1 %c %s $end\n", - (char)('!' + i), ch->name); - } - - g_string_append(header, "$upscope $end\n$enddefinitions $end\n"); - - return header; -} - -static int receive(struct sr_output *o, const struct sr_datafeed_packet *packet, - GString **out) -{ - const struct sr_datafeed_meta *meta; - const struct sr_datafeed_logic *logic; - const struct sr_config *src; - GSList *l; - struct context *ctx; - unsigned int i; - int p, curbit, prevbit, index; - uint8_t *sample; - gboolean timestamp_written; - - *out = NULL; - if (!o || !o->internal) - return SR_ERR_BUG; - ctx = o->internal; - - switch (packet->type) { - case SR_DF_META: - meta = packet->payload; - for (l = meta->config; l; l = l->next) { - src = l->data; - if (src->key != SR_CONF_SAMPLERATE) - continue; - ctx->samplerate = g_variant_get_uint64(src->data); - } - break; - case SR_DF_LOGIC: - logic = packet->payload; - - if (!ctx->header_done) { - *out = gen_header(o); - ctx->header_done = TRUE; - } else { - *out = g_string_sized_new(512); - } - - if (!ctx->prevsample) { - /* Can't allocate this until we know the stream's unitsize. */ - ctx->prevsample = g_malloc0(logic->unitsize); - } - - for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) { - sample = logic->data + i; - timestamp_written = FALSE; - - for (p = 0; p < ctx->num_enabled_channels; p++) { - index = ctx->channel_index[p]; - - curbit = ((unsigned)sample[index / 8] - >> (index % 8)) & 1; - prevbit = ((unsigned)ctx->prevsample[index / 8] - >> (index % 8)) & 1; - - /* VCD only contains deltas/changes of signals. */ - if (prevbit == curbit && ctx->samplecount > 0) - continue; - - /* Output timestamp of subsequent signal changes. */ - if (!timestamp_written) - g_string_append_printf(*out, "#%.0f", - (double)ctx->samplecount / - ctx->samplerate * ctx->period); - - /* Output which signal changed to which value. */ - g_string_append_c(*out, ' '); - g_string_append_c(*out, '0' + curbit); - g_string_append_c(*out, '!' + p); - - timestamp_written = TRUE; - } - - if (timestamp_written) - g_string_append_c(*out, '\n'); - - ctx->samplecount++; - memcpy(ctx->prevsample, sample, logic->unitsize); - } - break; - case SR_DF_END: - /* Write final timestamp as length indicator. */ - *out = g_string_sized_new(512); - g_string_printf(*out, "#%.0f\n", - (double)ctx->samplecount / ctx->samplerate * ctx->period); - break; - } - - return SR_OK; -} - -static int cleanup(struct sr_output *o) -{ - struct context *ctx; - - if (!o || !o->internal) - return SR_ERR_ARG; - - ctx = o->internal; - g_free(ctx->prevsample); - g_free(ctx->channel_index); - g_free(ctx); - - return SR_OK; -} - -struct sr_output_format output_vcd = { - .id = "vcd", - .description = "Value Change Dump (VCD)", - .init = init, - .receive = receive, - .cleanup = cleanup, -};