+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
- *
- * 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 3 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, see <http://www.gnu.org/licenses/>.
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <zip.h>
-#include "sigrok.h"
-#include "sigrok-internal.h"
-
-/* size of payloads sent across the session bus */
-#define CHUNKSIZE (512 * 1024)
-
-struct session_vdevice {
- char *capturefile;
- struct zip *archive;
- struct zip_file *capfile;
- int bytes_read;
- uint64_t samplerate;
- int unitsize;
- int num_probes;
-};
-
-static char *sessionfile = NULL;
-static GSList *device_instances = NULL;
-static int capabilities[] = {
- SR_HWCAP_CAPTUREFILE,
- SR_HWCAP_CAPTURE_UNITSIZE,
- 0,
-};
-
-/**
- * TODO.
- *
- * @param device_index TODO.
- */
-static struct session_vdevice *get_vdevice_by_index(int device_index)
-{
- struct sr_device_instance *sdi;
- struct session_vdevice *vdevice;
-
- /* TODO: Sanity checks on device_index. */
-
- if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
- sr_err("session driver: %s: device instance with device "
- "index %d was not found", __func__, device_index);
- return NULL;
- }
-
- /* TODO: Is sdi->priv == NULL valid? */
-
- vdevice = sdi->priv;
-
- return vdevice;
-}
-
-/**
- * TODO.
- *
- * @param fd TODO.
- * @param revents TODO.
- * @param session_data TODO.
- *
- * @return TODO.
- */
-static int feed_chunk(int fd, int revents, void *session_data)
-{
- struct sr_device_instance *sdi;
- struct session_vdevice *vdevice;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_logic logic;
- GSList *l;
- void *buf;
- int ret, got_data;
-
- /* Avoid compiler warnings. */
- (void)fd;
- (void)revents;
-
- sr_dbg("session_driver: feed chunk");
-
- got_data = FALSE;
- for (l = device_instances; l; l = l->next) {
- sdi = l->data;
- vdevice = sdi->priv;
- if (!vdevice)
- /* already done with this instance */
- continue;
-
- if (!(buf = g_try_malloc(CHUNKSIZE))) {
- sr_err("session: %s: buf malloc failed", __func__);
- return FALSE; /* TODO: SR_ERR_MALLOC */
- }
-
- ret = zip_fread(vdevice->capfile, buf, CHUNKSIZE);
- if (ret > 0) {
- got_data = TRUE;
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- logic.length = ret;
- logic.unitsize = vdevice->unitsize;
- logic.data = buf;
- vdevice->bytes_read += ret;
- sr_session_bus(session_data, &packet);
- } else {
- /* done with this capture file */
- zip_fclose(vdevice->capfile);
- g_free(vdevice->capturefile);
- g_free(vdevice);
- sdi->priv = NULL;
- }
- }
-
- if (!got_data) {
- packet.type = SR_DF_END;
- sr_session_bus(session_data, &packet);
- }
-
- return TRUE;
-}
-
-/* driver callbacks */
-static int hw_cleanup(void);
-
-/**
- * TODO.
- *
- * @param deviceinfo TODO.
- *
- * @return TODO.
- */
-static int hw_init(const char *deviceinfo)
-{
- sessionfile = g_strdup(deviceinfo);
-
- return 0;
-}
-
-/**
- * TODO.
- *
- */
-static int hw_cleanup(void)
-{
- GSList *l;
-
- for (l = device_instances; l; l = l->next)
- sr_dev_inst_free(l->data);
- g_slist_free(device_instances);
- device_instances = NULL;
-
- sr_session_source_remove(-1);
-
- g_free(sessionfile);
-
- return SR_OK;
-}
-
-static int hw_opendev(int device_index)
-{
- struct sr_device_instance *sdi;
-
- sdi = sr_dev_inst_new(device_index, SR_ST_INITIALIZING,
- NULL, NULL, NULL);
- if (!sdi)
- return SR_ERR;
-
- if (!(sdi->priv = g_try_malloc0(sizeof(struct session_vdevice)))) {
- sr_err("session: %s: sdi->priv malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- device_instances = g_slist_append(device_instances, sdi);
-
- return SR_OK;
-}
-
-static void *hw_get_device_info(int device_index, int device_info_id)
-{
- struct session_vdevice *vdevice;
- void *info;
-
- if (device_info_id != SR_DI_CUR_SAMPLERATE)
- return NULL;
-
- if (!(vdevice = get_vdevice_by_index(device_index)))
- return NULL;
-
- info = &vdevice->samplerate;
-
- return info;
-}
-
-static int hw_get_status(int device_index)
-{
- /* Avoid compiler warnings. */
- (void)device_index;
-
- if (sr_dev_list() != NULL)
- return SR_OK;
- else
- return SR_ERR;
-}
-
-/**
- * Get the list of hardware capabilities.
- *
- * @return A pointer to the (hardware) capabilities of this virtual session
- * driver. This could be NULL, if no such capabilities exist.
- */
-static int *hw_get_capabilities(void)
-{
- return capabilities;
-}
-
-static int hw_set_configuration(int device_index, int capability, void *value)
-{
- struct session_vdevice *vdevice;
- uint64_t *tmp_u64;
-
- if (!(vdevice = get_vdevice_by_index(device_index)))
- return SR_ERR;
-
- switch (capability) {
- case SR_HWCAP_SAMPLERATE:
- tmp_u64 = value;
- vdevice->samplerate = *tmp_u64;
- sr_info("session driver: setting samplerate to %" PRIu64,
- vdevice->samplerate);
- break;
- case SR_HWCAP_CAPTUREFILE:
- vdevice->capturefile = g_strdup(value);
- sr_info("session driver: setting capturefile to %s",
- vdevice->capturefile);
- break;
- case SR_HWCAP_CAPTURE_UNITSIZE:
- tmp_u64 = value;
- vdevice->unitsize = *tmp_u64;
- break;
- case SR_HWCAP_CAPTURE_NUM_PROBES:
- tmp_u64 = value;
- vdevice->num_probes = *tmp_u64;
- break;
- default:
- sr_err("session driver: %s: unknown capability %d requested",
- __func__, capability);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-static int hw_start_acquisition(int device_index, gpointer session_device_id)
-{
- struct zip_stat zs;
- struct session_vdevice *vdevice;
- struct sr_datafeed_header *header;
- struct sr_datafeed_packet *packet;
- int err;
-
- /* Avoid compiler warnings. */
- (void)session_device_id;
-
- if (!(vdevice = get_vdevice_by_index(device_index)))
- return SR_ERR;
-
- sr_info("session_driver: opening archive %s file %s", sessionfile,
- vdevice->capturefile);
-
- if (!(vdevice->archive = zip_open(sessionfile, 0, &err))) {
- sr_err("Failed to open session file '%s': zip error %d\n",
- sessionfile, err);
- return SR_ERR;
- }
-
- if (zip_stat(vdevice->archive, vdevice->capturefile, 0, &zs) == -1) {
- sr_err("Failed to check capture file '%s' in session file "
- "'%s'.", vdevice->capturefile, sessionfile);
- return SR_ERR;
- }
-
- if (!(vdevice->capfile = zip_fopen(vdevice->archive,
- vdevice->capturefile, 0))) {
- sr_err("Failed to open capture file '%s' in session file '%s'.",
- vdevice->capturefile, sessionfile);
- return SR_ERR;
- }
-
- /* freewheeling source */
- sr_session_source_add(-1, 0, 0, feed_chunk, session_device_id);
-
- if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
- sr_err("session: %s: packet malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
- sr_err("session: %s: header malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- /* Send header packet to the session bus. */
- packet->type = SR_DF_HEADER;
- packet->payload = (unsigned char *)header;
- header->feed_version = 1;
- gettimeofday(&header->starttime, NULL);
- header->samplerate = vdevice->samplerate;
- header->num_logic_probes = vdevice->num_probes;
- sr_session_bus(session_device_id, packet);
- g_free(header);
- g_free(packet);
-
- return SR_OK;
-}
-
-/* Not static, it's used elsewhere (via 'extern'). */
-struct sr_device_plugin session_driver = {
- "session",
- "Session-emulating driver",
- 1,
- hw_init,
- hw_cleanup,
- hw_opendev,
- NULL,
- hw_get_device_info,
- hw_get_status,
- hw_get_capabilities,
- hw_set_configuration,
- hw_start_acquisition,
- NULL,
-};
projects / libsigrok.git / blobdiff