/*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
*
* Copyright (C) 2011 Daniel Ribeiro <drwyrm@gmail.com>
* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
+ * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.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
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "protocol.h"
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
+#include "protocol.h"
-#define DEFAULT_PROBES 2
-#define SAMPLE_WIDTH 16
-#define DEFAULT_SAMPLERATE 44100
-// #define AUDIO_DEV "plughw:0,0"
-#define AUDIO_DEV "default"
-
-static const int hwcaps[] = {
- SR_HWCAP_SAMPLERATE,
- SR_HWCAP_LIMIT_SAMPLES,
- SR_HWCAP_CONTINUOUS,
- 0,
-};
-
-static const char *probe_names[] = {
- "Channel 0", "Channel 1",
- NULL,
+static const int32_t hwcaps[] = {
+ SR_CONF_SAMPLERATE,
+ SR_CONF_LIMIT_SAMPLES,
+ SR_CONF_CONTINUOUS,
};
SR_PRIV struct sr_dev_driver alsa_driver_info;
static struct sr_dev_driver *di = &alsa_driver_info;
-static int clear_instances(void)
+static void clear_helper(void *priv)
{
- /* TODO */
-
- return SR_OK;
-}
+ struct dev_context *devc;
-static int hw_init(struct sr_context *sr_ctx)
-{
- struct drv_context *drvc;
+ devc = priv;
- if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
- sr_err("Driver context malloc failed.");
- return SR_ERR_MALLOC;
- }
-
- drvc->sr_ctx = sr_ctx;
- di->priv = drvc;
+ snd_pcm_hw_params_free(devc->hw_params);
+ devc->hw_params = NULL;
- return SR_OK;
+ g_free((void *)devc->samplerates);
+ devc->samplerates = NULL;
}
-static GSList *hw_scan(GSList *options)
+static int dev_clear(void)
{
- struct drv_context *drvc;
- struct dev_context *devc;
- struct sr_dev_inst *sdi;
- struct sr_probe *probe;
- GSList *devices;
- int i;
-
- (void)options;
-
- drvc = di->priv;
- drvc->instances = NULL;
-
- devices = NULL;
-
- if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
- sr_err("Device context malloc failed.");
- return NULL;
- }
-
- if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL))) {
- sr_err("Failed to create device instance.");
- return NULL;
- }
-
- /* Set the samplerate to a default value for now. */
- devc->cur_samplerate = DEFAULT_SAMPLERATE;
- devc->num_probes = DEFAULT_PROBES;
-
- sdi->priv = devc;
- sdi->driver = di;
-
- for (i = 0; probe_names[i]; i++) {
- if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
- probe_names[i]))) {
- sr_err("Failed to create probe.");
- return NULL;
- }
- sdi->probes = g_slist_append(sdi->probes, probe);
- }
-
- drvc->instances = g_slist_append(drvc->instances, sdi);
- devices = g_slist_append(devices, sdi);
-
- return devices;
+ return std_dev_clear(di, clear_helper);
}
-static GSList *hw_dev_list(void)
+static int init(struct sr_context *sr_ctx)
{
- struct drv_context *drvc;
+ return std_init(sr_ctx, di, LOG_PREFIX);
+}
- drvc = di->priv;
+static GSList *scan(GSList *options)
+{
+ return alsa_scan(options, di);
+}
- return drvc->instances;
+static GSList *dev_list(void)
+{
+ return ((struct drv_context *)(di->priv))->instances;
}
-static int hw_dev_open(struct sr_dev_inst *sdi)
+static int dev_open(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
int ret;
devc = sdi->priv;
- sr_dbg("Opening audio device '%s' for stream capture.", AUDIO_DEV);
- ret = snd_pcm_open(&devc->capture_handle, AUDIO_DEV,
+ if (!(devc->hwdev)) {
+ sr_err("devc->hwdev was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ sr_dbg("Opening audio device '%s' for stream capture.", devc->hwdev);
+ ret = snd_pcm_open(&devc->capture_handle, devc->hwdev,
SND_PCM_STREAM_CAPTURE, 0);
if (ret < 0) {
sr_err("Can't open audio device: %s.", snd_strerror(ret));
return SR_ERR;
}
- sr_dbg("Allocating hardware parameter structure.");
- ret = snd_pcm_hw_params_malloc(&devc->hw_params);
- if (ret < 0) {
- sr_err("Can't allocate hardware parameter structure: %s.",
- snd_strerror(ret));
- return SR_ERR_MALLOC;
- }
-
sr_dbg("Initializing hardware parameter structure.");
ret = snd_pcm_hw_params_any(devc->capture_handle, devc->hw_params);
if (ret < 0) {
return SR_ERR;
}
+ sdi->status = SR_ST_ACTIVE;
+
return SR_OK;
}
-static int hw_dev_close(struct sr_dev_inst *sdi)
+static int dev_close(struct sr_dev_inst *sdi)
{
int ret;
struct dev_context *devc;
devc = sdi->priv;
- sr_dbg("Closing device.");
-
- if (devc->hw_params) {
- sr_dbg("Freeing hardware parameters.");
- snd_pcm_hw_params_free(devc->hw_params);
- } else {
- sr_dbg("No hardware parameters, no need to free.");
- }
-
if (devc->capture_handle) {
sr_dbg("Closing PCM device.");
- if ((ret = snd_pcm_close(devc->capture_handle)) < 0) {
+ if ((ret = snd_pcm_close(devc->capture_handle)) < 0)
sr_err("Failed to close device: %s.",
snd_strerror(ret));
- }
+ devc->capture_handle = NULL;
+ sdi->status = SR_ST_INACTIVE;
} else {
sr_dbg("No capture handle, no need to close audio device.");
}
return SR_OK;
}
-static int hw_cleanup(void)
+static int cleanup(void)
{
- clear_instances();
+ return dev_clear();
+}
+
+static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ struct dev_context *devc;
+
+ (void)cg;
+
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ devc = sdi->priv;
+ *data = g_variant_new_uint64(devc->cur_samplerate);
+ break;
+ default:
+ return SR_ERR_NA;
+ }
return SR_OK;
}
-static int hw_info_get(int info_id, const void **data,
- const struct sr_dev_inst *sdi)
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
{
struct dev_context *devc;
- if (info_id != SR_DI_HWCAPS) /* For SR_DI_HWCAPS sdi will be NULL. */
- devc = sdi->priv;
+ (void)cg;
- switch (info_id) {
- case SR_DI_HWCAPS:
- *data = hwcaps;
- break;
- case SR_DI_NUM_PROBES:
- *data = GINT_TO_POINTER(DEFAULT_PROBES);
- break;
- case SR_DI_PROBE_NAMES:
- *data = probe_names;
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
+
+ devc = sdi->priv;
+
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ alsa_set_samplerate(sdi, g_variant_get_uint64(data));
break;
- case SR_DI_CUR_SAMPLERATE:
- *data = &devc->cur_samplerate;
+ case SR_CONF_LIMIT_SAMPLES:
+ devc->limit_samples = g_variant_get_uint64(data);
break;
default:
- sr_err("Invalid info_id: %d.", info_id);
- return SR_ERR_ARG;
+ return SR_ERR_NA;
}
return SR_OK;
}
-static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
- const void *value)
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
{
struct dev_context *devc;
+ GVariant *gvar;
+ GVariantBuilder gvb;
+ int i;
- devc = sdi->priv;
+ (void)cg;
- switch (hwcap) {
- case SR_HWCAP_SAMPLERATE:
- devc->cur_samplerate = *(const uint64_t *)value;
+ switch (key) {
+ case SR_CONF_DEVICE_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+ hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
- case SR_HWCAP_LIMIT_SAMPLES:
- devc->limit_samples = *(const uint64_t *)value;
+ case SR_CONF_SAMPLERATE:
+ if (!sdi || !sdi->priv)
+ return SR_ERR_ARG;
+ devc = sdi->priv;
+ if (!devc->samplerates) {
+ sr_err("Instance did not contain a samplerate list.");
+ return SR_ERR_ARG;
+ }
+ for (i = 0; devc->samplerates[i]; i++)
+ ;
+ g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
+ gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
+ devc->samplerates, i, sizeof(uint64_t));
+ g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
+ *data = g_variant_builder_end(&gvb);
break;
default:
- sr_err("Unknown capability: %d.", hwcap);
- return SR_ERR;
+ return SR_ERR_NA;
}
return SR_OK;
}
-static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
- void *cb_data)
+static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_header header;
- struct sr_datafeed_meta_analog meta;
struct dev_context *devc;
int count, ret;
+ char *endianness;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
devc = sdi->priv;
devc->cb_data = cb_data;
+ devc->num_samples = 0;
sr_dbg("Setting audio access type to RW/interleaved.");
ret = snd_pcm_hw_params_set_access(devc->capture_handle,
}
/* FIXME: Hardcoded for 16bits. */
- sr_dbg("Setting audio sample format to signed 16bit (little endian).");
+ if (SND_PCM_FORMAT_S16 == SND_PCM_FORMAT_S16_LE)
+ endianness = "little endian";
+ else
+ endianness = "big endian";
+ sr_dbg("Setting audio sample format to signed 16bit (%s).", endianness);
ret = snd_pcm_hw_params_set_format(devc->capture_handle,
- devc->hw_params, SND_PCM_FORMAT_S16_LE);
+ devc->hw_params,
+ SND_PCM_FORMAT_S16);
if (ret < 0) {
sr_err("Can't set audio sample format: %s.", snd_strerror(ret));
return SR_ERR;
return SR_ERR;
}
- sr_dbg("Setting audio channel count to %d.", devc->num_probes);
+ sr_dbg("Setting audio channel count to %d.", devc->num_channels);
ret = snd_pcm_hw_params_set_channels(devc->capture_handle,
- devc->hw_params, devc->num_probes);
+ devc->hw_params, devc->num_channels);
if (ret < 0) {
sr_err("Can't set channel count: %s.", snd_strerror(ret));
return SR_ERR;
sr_err("Unable to obtain poll descriptors count.");
return SR_ERR;
}
- sr_spew("Obtained poll descriptor count: %d.", count);
if (!(devc->ufds = g_try_malloc(count * sizeof(struct pollfd)))) {
sr_err("Failed to malloc ufds.");
return SR_ERR_MALLOC;
}
- sr_err("Getting %d poll descriptors.", count);
+ sr_spew("Getting %d poll descriptors.", count);
ret = snd_pcm_poll_descriptors(devc->capture_handle, devc->ufds, count);
if (ret < 0) {
sr_err("Unable to obtain poll descriptors: %s.",
}
/* Send header packet to the session bus. */
- sr_dbg("Sending SR_DF_HEADER packet.");
- packet.type = SR_DF_HEADER;
- packet.payload = (uint8_t *)&header;
- header.feed_version = 1;
- gettimeofday(&header.starttime, NULL);
- sr_session_send(devc->cb_data, &packet);
-
- /* Send metadata about the SR_DF_ANALOG packets to come. */
- sr_dbg("Sending SR_DF_META_ANALOG packet.");
- packet.type = SR_DF_META_ANALOG;
- packet.payload = &meta;
- meta.num_probes = devc->num_probes;
- sr_session_send(devc->cb_data, &packet);
+ std_session_send_df_header(cb_data, LOG_PREFIX);
/* Poll every 10ms, or whenever some data comes in. */
sr_source_add(devc->ufds[0].fd, devc->ufds[0].events, 10,
return SR_OK;
}
-static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct sr_datafeed_packet packet;
struct dev_context *devc;
.name = "alsa",
.longname = "ALSA driver",
.api_version = 1,
- .init = hw_init,
- .cleanup = hw_cleanup,
- .scan = hw_scan,
- .dev_list = hw_dev_list,
- .dev_clear = clear_instances,
- .dev_open = hw_dev_open,
- .dev_close = hw_dev_close,
- .info_get = hw_info_get,
- .dev_config_set = hw_dev_config_set,
- .dev_acquisition_start = hw_dev_acquisition_start,
- .dev_acquisition_stop = hw_dev_acquisition_stop,
+ .init = init,
+ .cleanup = cleanup,
+ .scan = scan,
+ .dev_list = dev_list,
+ .dev_clear = dev_clear,
+ .config_get = config_get,
+ .config_set = config_set,
+ .config_list = config_list,
+ .dev_open = dev_open,
+ .dev_close = dev_close,
+ .dev_acquisition_start = dev_acquisition_start,
+ .dev_acquisition_stop = dev_acquisition_stop,
.priv = NULL,
};
projects / libsigrok.git / blobdiff