X-Git-Url: http://sigrok.org/gitweb/?p=libsigrok.git;a=blobdiff_plain;f=session_driver.c;h=fe0db3e6e0acbbf0ad5b808e4321b11fe8a48d35;hp=7ca8d353a4955de1b30bc5a209a651e918f651cb;hb=HEAD;hpb=133a37bfba1a7e1423716b2b872d3bb82a2e64d9 diff --git a/session_driver.c b/session_driver.c deleted file mode 100644 index 7ca8d353..00000000 --- a/session_driver.c +++ /dev/null @@ -1,349 +0,0 @@ -/* - * This file is part of the sigrok project. - * - * Copyright (C) 2012 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 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 . - */ - -#include -#include -#include -#include -#include -#include -#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_get_device_instance(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 void hw_cleanup(void); - -/** - * TODO. - * - * @param deviceinfo TODO. - * - * @return TODO. - */ -static int hw_init(const char *deviceinfo) -{ - - sessionfile = g_strdup(deviceinfo); - - return 0; -} - -/** - * TODO. - * - */ -static void hw_cleanup(void) -{ - GSList *l; - - for (l = device_instances; l; l = l->next) - sr_device_instance_free(l->data); - - g_slist_free(device_instances); - device_instances = NULL; - - sr_session_source_remove(-1); - - g_free(sessionfile); -} - -static int hw_opendev(int device_index) -{ - struct sr_device_instance *sdi; - - sdi = sr_device_instance_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_device_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, -};