738 lines
19 KiB
C
738 lines
19 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
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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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* (at your option) 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 <config.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <glib.h>
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#include <glib/gstdio.h>
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#include <zip.h>
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#include <libsigrok/libsigrok.h>
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#include "libsigrok-internal.h"
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#define LOG_PREFIX "output/srzip"
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#define CHUNK_SIZE (4 * 1024 * 1024)
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struct out_context {
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gboolean zip_created;
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uint64_t samplerate;
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char *filename;
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size_t first_analog_index;
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size_t analog_ch_count;
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gint *analog_index_map;
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struct logic_buff {
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size_t unit_size;
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size_t alloc_size;
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uint8_t *samples;
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size_t fill_size;
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} logic_buff;
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struct analog_buff {
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size_t alloc_size;
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float *samples;
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size_t fill_size;
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} *analog_buff;
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};
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static int init(struct sr_output *o, GHashTable *options)
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{
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struct out_context *outc;
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(void)options;
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if (!o->filename || o->filename[0] == '\0') {
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sr_info("srzip output module requires a file name, cannot save.");
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return SR_ERR_ARG;
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}
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outc = g_malloc0(sizeof(*outc));
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outc->filename = g_strdup(o->filename);
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o->priv = outc;
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return SR_OK;
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}
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static int zip_create(const struct sr_output *o)
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{
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struct out_context *outc;
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struct zip *zipfile;
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struct zip_source *versrc, *metasrc;
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struct sr_channel *ch;
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size_t ch_nr;
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size_t alloc_size;
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GVariant *gvar;
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GKeyFile *meta;
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GSList *l;
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const char *devgroup;
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char *s, *metabuf;
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gsize metalen;
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guint logic_channels, enabled_logic_channels;
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guint enabled_analog_channels;
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guint index;
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outc = o->priv;
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if (outc->samplerate == 0 && sr_config_get(o->sdi->driver, o->sdi, NULL,
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SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
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outc->samplerate = g_variant_get_uint64(gvar);
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g_variant_unref(gvar);
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}
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/* Quietly delete it first, libzip wants replace ops otherwise. */
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g_unlink(outc->filename);
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zipfile = zip_open(outc->filename, ZIP_CREATE, NULL);
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if (!zipfile)
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return SR_ERR;
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/* "version" */
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versrc = zip_source_buffer(zipfile, "2", 1, FALSE);
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if (zip_add(zipfile, "version", versrc) < 0) {
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sr_err("Error saving version into zipfile: %s",
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zip_strerror(zipfile));
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zip_source_free(versrc);
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zip_discard(zipfile);
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return SR_ERR;
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}
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/* init "metadata" */
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meta = g_key_file_new();
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g_key_file_set_string(meta, "global", "sigrok version",
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sr_package_version_string_get());
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devgroup = "device 1";
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logic_channels = 0;
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enabled_logic_channels = 0;
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enabled_analog_channels = 0;
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for (l = o->sdi->channels; l; l = l->next) {
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ch = l->data;
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switch (ch->type) {
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case SR_CHANNEL_LOGIC:
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if (ch->enabled)
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enabled_logic_channels++;
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logic_channels++;
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break;
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case SR_CHANNEL_ANALOG:
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if (ch->enabled)
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enabled_analog_channels++;
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break;
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}
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}
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/* When reading the file, the first index of the analog channels
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* can only be deduced through the "total probes" count, so the
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* first analog index must follow the last logic one, enabled or not. */
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if (enabled_logic_channels > 0)
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outc->first_analog_index = logic_channels + 1;
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else
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outc->first_analog_index = 1;
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/* Only set capturefile and probes if we will actually save logic data. */
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if (enabled_logic_channels > 0) {
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g_key_file_set_string(meta, devgroup, "capturefile", "logic-1");
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g_key_file_set_integer(meta, devgroup, "total probes", logic_channels);
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}
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s = sr_samplerate_string(outc->samplerate);
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g_key_file_set_string(meta, devgroup, "samplerate", s);
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g_free(s);
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g_key_file_set_integer(meta, devgroup, "total analog", enabled_analog_channels);
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outc->analog_ch_count = enabled_analog_channels;
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alloc_size = sizeof(gint) * outc->analog_ch_count + 1;
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outc->analog_index_map = g_malloc0(alloc_size);
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index = 0;
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for (l = o->sdi->channels; l; l = l->next) {
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ch = l->data;
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if (!ch->enabled)
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continue;
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s = NULL;
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switch (ch->type) {
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case SR_CHANNEL_LOGIC:
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ch_nr = ch->index + 1;
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s = g_strdup_printf("probe%zu", ch_nr);
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break;
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case SR_CHANNEL_ANALOG:
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ch_nr = outc->first_analog_index + index;
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outc->analog_index_map[index] = ch->index;
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s = g_strdup_printf("analog%zu", ch_nr);
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index++;
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break;
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}
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if (s) {
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g_key_file_set_string(meta, devgroup, s, ch->name);
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g_free(s);
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}
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}
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/*
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* Allocate one samples buffer for all logic channels, and
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* several samples buffers for the analog channels. Allocate
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* buffers of CHUNK_SIZE size (in bytes), and determine the
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* sample counts from the respective channel counts and data
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* type widths.
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*
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* These buffers are intended to reduce the number of ZIP
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* archive update calls, and decouple the srzip output module
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* from implementation details in other acquisition device
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* drivers and input modules.
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*
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* Avoid allocating zero bytes, to not depend on platform
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* specific malloc(0) return behaviour. Avoid division by zero,
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* holding a local buffer won't harm when no data is seen later
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* during execution. This simplifies other locations.
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*/
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alloc_size = CHUNK_SIZE;
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outc->logic_buff.unit_size = logic_channels;
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outc->logic_buff.unit_size += 8 - 1;
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outc->logic_buff.unit_size /= 8;
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outc->logic_buff.samples = g_try_malloc0(alloc_size);
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if (!outc->logic_buff.samples)
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return SR_ERR_MALLOC;
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if (outc->logic_buff.unit_size)
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alloc_size /= outc->logic_buff.unit_size;
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outc->logic_buff.alloc_size = alloc_size;
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outc->logic_buff.fill_size = 0;
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alloc_size = sizeof(outc->analog_buff[0]) * outc->analog_ch_count + 1;
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outc->analog_buff = g_malloc0(alloc_size);
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for (index = 0; index < outc->analog_ch_count; index++) {
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alloc_size = CHUNK_SIZE;
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outc->analog_buff[index].samples = g_try_malloc0(alloc_size);
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if (!outc->analog_buff[index].samples)
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return SR_ERR_MALLOC;
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alloc_size /= sizeof(outc->analog_buff[0].samples[0]);
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outc->analog_buff[index].alloc_size = alloc_size;
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outc->analog_buff[index].fill_size = 0;
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}
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metabuf = g_key_file_to_data(meta, &metalen, NULL);
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g_key_file_free(meta);
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metasrc = zip_source_buffer(zipfile, metabuf, metalen, FALSE);
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if (zip_add(zipfile, "metadata", metasrc) < 0) {
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sr_err("Error saving metadata into zipfile: %s",
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zip_strerror(zipfile));
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zip_source_free(metasrc);
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zip_discard(zipfile);
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g_free(metabuf);
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return SR_ERR;
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}
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if (zip_close(zipfile) < 0) {
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sr_err("Error saving zipfile: %s", zip_strerror(zipfile));
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zip_discard(zipfile);
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g_free(metabuf);
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return SR_ERR;
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}
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g_free(metabuf);
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return SR_OK;
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}
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/**
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* Append a block of logic data to an srzip archive.
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*
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* @param[in] o Output module instance.
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* @param[in] buf Logic data samples as byte sequence.
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* @param[in] unitsize Logic data unit size (bytes per sample).
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* @param[in] length Byte sequence length (in bytes, not samples).
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*
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* @returns SR_OK et al error codes.
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*/
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static int zip_append(const struct sr_output *o,
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uint8_t *buf, size_t unitsize, size_t length)
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{
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struct out_context *outc;
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struct zip *archive;
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struct zip_source *logicsrc;
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int64_t i, num_files;
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struct zip_stat zs;
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struct zip_source *metasrc;
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GKeyFile *kf;
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GError *error;
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uint64_t chunk_num;
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const char *entry_name;
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char *metabuf;
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gsize metalen;
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char *chunkname;
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unsigned int next_chunk_num;
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if (!length)
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return SR_OK;
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outc = o->priv;
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if (!(archive = zip_open(outc->filename, 0, NULL)))
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return SR_ERR;
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if (zip_stat(archive, "metadata", 0, &zs) < 0) {
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sr_err("Failed to open metadata: %s", zip_strerror(archive));
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zip_discard(archive);
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return SR_ERR;
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}
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kf = sr_sessionfile_read_metadata(archive, &zs);
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if (!kf) {
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zip_discard(archive);
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return SR_ERR_DATA;
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}
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/*
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* If the file was only initialized but doesn't yet have any
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* data it in, it won't have a unitsize field in metadata yet.
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*/
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error = NULL;
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metabuf = NULL;
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if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
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if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
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sr_err("Failed to check unitsize key: %s", error->message);
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g_error_free(error);
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g_key_file_free(kf);
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zip_discard(archive);
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return SR_ERR;
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}
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g_clear_error(&error);
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/* Add unitsize field. */
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g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
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metabuf = g_key_file_to_data(kf, &metalen, NULL);
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metasrc = zip_source_buffer(archive, metabuf, metalen, FALSE);
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if (zip_replace(archive, zs.index, metasrc) < 0) {
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sr_err("Failed to replace metadata: %s",
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zip_strerror(archive));
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g_key_file_free(kf);
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zip_source_free(metasrc);
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zip_discard(archive);
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g_free(metabuf);
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return SR_ERR;
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}
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}
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g_key_file_free(kf);
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next_chunk_num = 1;
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num_files = zip_get_num_entries(archive, 0);
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for (i = 0; i < num_files; i++) {
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entry_name = zip_get_name(archive, i, 0);
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if (!entry_name || strncmp(entry_name, "logic-1", 7) != 0)
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continue;
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if (entry_name[7] == '\0') {
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/*
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* This file has no extra chunks, just a single
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* "logic-1". Rename it to "logic-1-1" and continue
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* with chunk 2.
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*/
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if (zip_rename(archive, i, "logic-1-1") < 0) {
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sr_err("Failed to rename 'logic-1' to 'logic-1-1': %s",
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zip_strerror(archive));
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zip_discard(archive);
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g_free(metabuf);
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return SR_ERR;
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}
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next_chunk_num = 2;
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break;
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} else if (entry_name[7] == '-') {
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chunk_num = g_ascii_strtoull(entry_name + 8, NULL, 10);
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if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
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next_chunk_num = chunk_num + 1;
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}
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}
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if (length % unitsize != 0) {
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sr_warn("Chunk size %zu not a multiple of the"
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" unit size %zu.", length, unitsize);
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}
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logicsrc = zip_source_buffer(archive, buf, length, FALSE);
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chunkname = g_strdup_printf("logic-1-%u", next_chunk_num);
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i = zip_add(archive, chunkname, logicsrc);
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g_free(chunkname);
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if (i < 0) {
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sr_err("Failed to add chunk 'logic-1-%u': %s",
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next_chunk_num, zip_strerror(archive));
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zip_source_free(logicsrc);
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zip_discard(archive);
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g_free(metabuf);
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return SR_ERR;
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}
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if (zip_close(archive) < 0) {
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sr_err("Error saving session file: %s", zip_strerror(archive));
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zip_discard(archive);
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g_free(metabuf);
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return SR_ERR;
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}
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g_free(metabuf);
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return SR_OK;
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}
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/**
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* Queue a block of logic data for srzip archive writes.
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*
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* @param[in] o Output module instance.
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* @param[in] buf Logic data samples as byte sequence.
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* @param[in] unitsize Logic data unit size (bytes per sample).
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* @param[in] length Number of bytes of sample data.
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* @param[in] flush Force ZIP archive update (queue by default).
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*
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* @returns SR_OK et al error codes.
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*/
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static int zip_append_queue(const struct sr_output *o,
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uint8_t *buf, size_t unitsize, size_t length, gboolean flush)
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{
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struct out_context *outc;
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struct logic_buff *buff;
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size_t send_size, remain, copy_size;
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uint8_t *wrptr, *rdptr;
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int ret;
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outc = o->priv;
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buff = &outc->logic_buff;
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if (length && unitsize != buff->unit_size) {
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sr_warn("Unexpected unit size, discarding logic data.");
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return SR_ERR_ARG;
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}
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/*
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* Queue most recently received samples to the local buffer.
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* Flush to the ZIP archive when the buffer space is exhausted.
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*/
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rdptr = buf;
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send_size = buff->unit_size ? length / buff->unit_size : 0;
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while (send_size) {
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remain = buff->alloc_size - buff->fill_size;
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if (remain) {
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wrptr = &buff->samples[buff->fill_size * buff->unit_size];
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copy_size = MIN(send_size, remain);
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send_size -= copy_size;
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buff->fill_size += copy_size;
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memcpy(wrptr, rdptr, copy_size * buff->unit_size);
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rdptr += copy_size * buff->unit_size;
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remain -= copy_size;
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}
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if (send_size && !remain) {
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ret = zip_append(o, buff->samples, buff->unit_size,
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buff->fill_size * buff->unit_size);
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if (ret != SR_OK)
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return ret;
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buff->fill_size = 0;
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remain = buff->alloc_size - buff->fill_size;
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}
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}
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/* Flush to the ZIP archive if the caller wants us to. */
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if (flush && buff->fill_size) {
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ret = zip_append(o, buff->samples, buff->unit_size,
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buff->fill_size * buff->unit_size);
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if (ret != SR_OK)
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return ret;
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buff->fill_size = 0;
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}
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return SR_OK;
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}
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|
|
/**
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* Append analog data of a channel to an srzip archive.
|
|
*
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* @param[in] o Output module instance.
|
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* @param[in] values Sample data as array of floating point values.
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* @param[in] count Number of samples (float items, not bytes).
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* @param[in] ch_nr 1-based channel number.
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*
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* @returns SR_OK et al error codes.
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*/
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static int zip_append_analog(const struct sr_output *o,
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const float *values, size_t count, size_t ch_nr)
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{
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struct out_context *outc;
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struct zip *archive;
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struct zip_source *analogsrc;
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int64_t i, num_files;
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size_t size;
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struct zip_stat zs;
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uint64_t chunk_num;
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const char *entry_name;
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char *basename;
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gsize baselen;
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char *chunkname;
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unsigned int next_chunk_num;
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outc = o->priv;
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if (!(archive = zip_open(outc->filename, 0, NULL)))
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return SR_ERR;
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|
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if (zip_stat(archive, "metadata", 0, &zs) < 0) {
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sr_err("Failed to open metadata: %s", zip_strerror(archive));
|
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zip_discard(archive);
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return SR_ERR;
|
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}
|
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|
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basename = g_strdup_printf("analog-1-%zu", ch_nr);
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baselen = strlen(basename);
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next_chunk_num = 1;
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num_files = zip_get_num_entries(archive, 0);
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for (i = 0; i < num_files; i++) {
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entry_name = zip_get_name(archive, i, 0);
|
|
if (!entry_name || strncmp(entry_name, basename, baselen) != 0) {
|
|
continue;
|
|
} else if (entry_name[baselen] == '-') {
|
|
chunk_num = g_ascii_strtoull(entry_name + baselen + 1, NULL, 10);
|
|
if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
|
|
next_chunk_num = chunk_num + 1;
|
|
}
|
|
}
|
|
|
|
size = sizeof(values[0]) * count;
|
|
analogsrc = zip_source_buffer(archive, values, size, FALSE);
|
|
chunkname = g_strdup_printf("%s-%u", basename, next_chunk_num);
|
|
i = zip_add(archive, chunkname, analogsrc);
|
|
if (i < 0) {
|
|
sr_err("Failed to add chunk '%s': %s", chunkname, zip_strerror(archive));
|
|
g_free(chunkname);
|
|
g_free(basename);
|
|
zip_source_free(analogsrc);
|
|
zip_discard(archive);
|
|
return SR_ERR;
|
|
}
|
|
g_free(chunkname);
|
|
if (zip_close(archive) < 0) {
|
|
sr_err("Error saving session file: %s", zip_strerror(archive));
|
|
g_free(basename);
|
|
zip_discard(archive);
|
|
return SR_ERR;
|
|
}
|
|
|
|
g_free(basename);
|
|
|
|
return SR_OK;
|
|
}
|
|
|
|
/**
|
|
* Queue analog data of a channel for srzip archive writes.
|
|
*
|
|
* @param[in] o Output module instance.
|
|
* @param[in] analog Sample data (session feed packet format).
|
|
* @param[in] flush Force ZIP archive update (queue by default).
|
|
*
|
|
* @returns SR_OK et al error codes.
|
|
*/
|
|
static int zip_append_analog_queue(const struct sr_output *o,
|
|
const struct sr_datafeed_analog *analog, gboolean flush)
|
|
{
|
|
struct out_context *outc;
|
|
const struct sr_channel *ch;
|
|
size_t idx, nr;
|
|
struct analog_buff *buff;
|
|
float *values, *wrptr, *rdptr;
|
|
size_t send_size, remain, copy_size;
|
|
int ret;
|
|
|
|
outc = o->priv;
|
|
|
|
/* Is this the DF_END flush call without samples submission? */
|
|
if (!analog && flush) {
|
|
for (idx = 0; idx < outc->analog_ch_count; idx++) {
|
|
nr = outc->first_analog_index + idx;
|
|
buff = &outc->analog_buff[idx];
|
|
if (!buff->fill_size)
|
|
continue;
|
|
ret = zip_append_analog(o,
|
|
buff->samples, buff->fill_size, nr);
|
|
if (ret != SR_OK)
|
|
return ret;
|
|
buff->fill_size = 0;
|
|
}
|
|
return SR_OK;
|
|
}
|
|
|
|
/* Lookup index and number of the analog channel. */
|
|
/* TODO: support packets covering multiple channels */
|
|
if (g_slist_length(analog->meaning->channels) != 1) {
|
|
sr_err("Analog packets covering multiple channels not supported yet");
|
|
return SR_ERR;
|
|
}
|
|
ch = g_slist_nth_data(analog->meaning->channels, 0);
|
|
for (idx = 0; idx < outc->analog_ch_count; idx++) {
|
|
if (outc->analog_index_map[idx] == ch->index)
|
|
break;
|
|
}
|
|
if (idx == outc->analog_ch_count)
|
|
return SR_ERR_ARG;
|
|
nr = outc->first_analog_index + idx;
|
|
buff = &outc->analog_buff[idx];
|
|
|
|
/* Convert the analog data to an array of float values. */
|
|
values = g_try_malloc0(analog->num_samples * sizeof(values[0]));
|
|
if (!values)
|
|
return SR_ERR_MALLOC;
|
|
ret = sr_analog_to_float(analog, values);
|
|
if (ret != SR_OK) {
|
|
g_free(values);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Queue most recently received samples to the local buffer.
|
|
* Flush to the ZIP archive when the buffer space is exhausted.
|
|
*/
|
|
rdptr = values;
|
|
send_size = analog->num_samples;
|
|
while (send_size) {
|
|
remain = buff->alloc_size - buff->fill_size;
|
|
if (remain) {
|
|
wrptr = &buff->samples[buff->fill_size];
|
|
copy_size = MIN(send_size, remain);
|
|
send_size -= copy_size;
|
|
buff->fill_size += copy_size;
|
|
memcpy(wrptr, rdptr, copy_size * sizeof(values[0]));
|
|
rdptr += copy_size;
|
|
remain -= copy_size;
|
|
}
|
|
if (send_size && !remain) {
|
|
ret = zip_append_analog(o,
|
|
buff->samples, buff->fill_size, nr);
|
|
if (ret != SR_OK) {
|
|
g_free(values);
|
|
return ret;
|
|
}
|
|
buff->fill_size = 0;
|
|
remain = buff->alloc_size - buff->fill_size;
|
|
}
|
|
}
|
|
g_free(values);
|
|
|
|
/* Flush to the ZIP archive if the caller wants us to. */
|
|
if (flush && buff->fill_size) {
|
|
ret = zip_append_analog(o, buff->samples, buff->fill_size, nr);
|
|
if (ret != SR_OK)
|
|
return ret;
|
|
buff->fill_size = 0;
|
|
}
|
|
|
|
return SR_OK;
|
|
}
|
|
|
|
static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
|
|
GString **out)
|
|
{
|
|
struct out_context *outc;
|
|
const struct sr_datafeed_meta *meta;
|
|
const struct sr_datafeed_logic *logic;
|
|
const struct sr_datafeed_analog *analog;
|
|
const struct sr_config *src;
|
|
GSList *l;
|
|
int ret;
|
|
|
|
*out = NULL;
|
|
if (!o || !o->sdi || !(outc = o->priv))
|
|
return SR_ERR_ARG;
|
|
|
|
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;
|
|
outc->samplerate = g_variant_get_uint64(src->data);
|
|
}
|
|
break;
|
|
case SR_DF_LOGIC:
|
|
if (!outc->zip_created) {
|
|
if ((ret = zip_create(o)) != SR_OK)
|
|
return ret;
|
|
outc->zip_created = TRUE;
|
|
}
|
|
logic = packet->payload;
|
|
ret = zip_append_queue(o, logic->data,
|
|
logic->unitsize, logic->length, FALSE);
|
|
if (ret != SR_OK)
|
|
return ret;
|
|
break;
|
|
case SR_DF_ANALOG:
|
|
if (!outc->zip_created) {
|
|
if ((ret = zip_create(o)) != SR_OK)
|
|
return ret;
|
|
outc->zip_created = TRUE;
|
|
}
|
|
analog = packet->payload;
|
|
ret = zip_append_analog_queue(o, analog, FALSE);
|
|
if (ret != SR_OK)
|
|
return ret;
|
|
break;
|
|
case SR_DF_END:
|
|
if (outc->zip_created) {
|
|
ret = zip_append_queue(o, NULL, 0, 0, TRUE);
|
|
if (ret != SR_OK)
|
|
return ret;
|
|
ret = zip_append_analog_queue(o, NULL, TRUE);
|
|
if (ret != SR_OK)
|
|
return ret;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return SR_OK;
|
|
}
|
|
|
|
static struct sr_option options[] = {
|
|
ALL_ZERO
|
|
};
|
|
|
|
static const struct sr_option *get_options(void)
|
|
{
|
|
return options;
|
|
}
|
|
|
|
static int cleanup(struct sr_output *o)
|
|
{
|
|
struct out_context *outc;
|
|
size_t idx;
|
|
|
|
outc = o->priv;
|
|
|
|
g_free(outc->analog_index_map);
|
|
g_free(outc->filename);
|
|
g_free(outc->logic_buff.samples);
|
|
for (idx = 0; idx < outc->analog_ch_count; idx++)
|
|
g_free(outc->analog_buff[idx].samples);
|
|
g_free(outc->analog_buff);
|
|
|
|
g_free(outc);
|
|
o->priv = NULL;
|
|
|
|
return SR_OK;
|
|
}
|
|
|
|
SR_PRIV struct sr_output_module output_srzip = {
|
|
.id = "srzip",
|
|
.name = "srzip",
|
|
.desc = "srzip session file format data",
|
|
.exts = (const char*[]){"sr", NULL},
|
|
.flags = SR_OUTPUT_INTERNAL_IO_HANDLING,
|
|
.options = get_options,
|
|
.init = init,
|
|
.receive = receive,
|
|
.cleanup = cleanup,
|
|
};
|