#include <unistd.h>
#include <string.h>
#include <alsa/asoundlib.h>
-#include "sigrok.h"
-#include "sigrok-internal.h"
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
#define NUM_PROBES 2
#define SAMPLE_WIDTH 16
struct sr_analog_probe probes[];
};
-static int hwcaps[] = {
+static const int hwcaps[] = {
SR_HWCAP_SAMPLERATE,
SR_HWCAP_LIMIT_SAMPLES,
SR_HWCAP_CONTINUOUS,
};
+/* TODO: Which probe names/numbers to use? */
static const char *probe_names[NUM_PROBES + 1] = {
"0",
"1",
uint64_t limit_samples;
snd_pcm_t *capture_handle;
snd_pcm_hw_params_t *hw_params;
- gpointer session_id;
+ void *session_dev_id;
};
static int hw_init(const char *devinfo)
if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
sr_err("alsa: %s: ctx malloc failed", __func__);
- return 0;
+ return SR_ERR_MALLOC;
}
if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL))) {
{
struct sr_dev_inst *sdi;
struct context *ctx;
- int err;
+ int ret;
if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
return SR_ERR;
ctx = sdi->priv;
- err = snd_pcm_open(&ctx->capture_handle, AUDIO_DEV,
+ ret = snd_pcm_open(&ctx->capture_handle, AUDIO_DEV,
SND_PCM_STREAM_CAPTURE, 0);
- if (err < 0) {
+ if (ret < 0) {
sr_err("alsa: can't open audio device %s (%s)", AUDIO_DEV,
- snd_strerror(err));
+ snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_hw_params_malloc(&ctx->hw_params);
- if (err < 0) {
+ ret = snd_pcm_hw_params_malloc(&ctx->hw_params);
+ if (ret < 0) {
sr_err("alsa: can't allocate hardware parameter structure (%s)",
- snd_strerror(err));
- return SR_ERR;
+ snd_strerror(ret));
+ return SR_ERR_MALLOC;
}
- err = snd_pcm_hw_params_any(ctx->capture_handle, ctx->hw_params);
- if (err < 0) {
+ ret = snd_pcm_hw_params_any(ctx->capture_handle, ctx->hw_params);
+ if (ret < 0) {
sr_err("alsa: can't initialize hardware parameter structure "
- "(%s)", snd_strerror(err));
+ "(%s)", snd_strerror(ret));
return SR_ERR;
}
if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
sr_err("alsa: %s: sdi was NULL", __func__);
- return SR_ERR; /* TODO: SR_ERR_ARG? */
+ return SR_ERR_BUG;
}
if (!(ctx = sdi->priv)) {
sr_err("alsa: %s: sdi->priv was NULL", __func__);
- return SR_ERR; /* TODO: SR_ERR_ARG? */
+ return SR_ERR_BUG;
}
// TODO: Return values of snd_*?
return SR_OK;
}
-static void *hw_dev_info_get(int dev_index, int dev_info_id)
+static const void *hw_dev_info_get(int dev_index, int dev_info_id)
{
struct sr_dev_inst *sdi;
struct context *ctx;
return SR_ST_ACTIVE;
}
-static int *hw_hwcap_get_all(void)
+static const int *hw_hwcap_get_all(void)
{
return hwcaps;
}
-static int hw_dev_config_set(int dev_index, int hwcap, void *value)
+static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
{
struct sr_dev_inst *sdi;
struct context *ctx;
case SR_HWCAP_PROBECONFIG:
return SR_OK;
case SR_HWCAP_SAMPLERATE:
- ctx->cur_rate = *(uint64_t *)value;
+ ctx->cur_rate = *(const uint64_t *)value;
return SR_OK;
case SR_HWCAP_LIMIT_SAMPLES:
- ctx->limit_samples = *(uint64_t *)value;
+ ctx->limit_samples = *(const uint64_t *)value;
return SR_OK;
default:
return SR_ERR;
}
}
-static int receive_data(int fd, int revents, void *user_data)
+static int receive_data(int fd, int revents, void *cb_data)
{
- struct sr_dev_inst *sdi = user_data;
+ struct sr_dev_inst *sdi = cb_data;
struct context *ctx = sdi->priv;
struct sr_datafeed_packet packet;
struct sr_analog_sample *sample;
packet.length = count * sample_size;
packet.unitsize = sample_size;
packet.payload = outb;
- sr_session_bus(user_data, &packet);
+ sr_session_send(sdi, &packet);
g_free(outb);
ctx->limit_samples -= count;
} while (ctx->limit_samples > 0);
packet.type = SR_DF_END;
- sr_session_bus(user_data, &packet);
+ sr_session_send(sdi, &packet);
return TRUE;
}
-static int hw_dev_acquisition_start(int dev_index, gpointer session_dev_id)
+static int hw_dev_acquisition_start(int dev_index, void *cb_data)
{
struct sr_dev_inst *sdi;
struct context *ctx;
struct sr_datafeed_header header;
struct pollfd *ufds;
int count;
- int err;
+ int ret;
if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
return SR_ERR;
ctx = sdi->priv;
- err = snd_pcm_hw_params_set_access(ctx->capture_handle,
+ ret = snd_pcm_hw_params_set_access(ctx->capture_handle,
ctx->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
- if (err < 0) {
- sr_err("alsa: can't set access type (%s)", snd_strerror(err));
+ if (ret < 0) {
+ sr_err("alsa: can't set access type (%s)", snd_strerror(ret));
return SR_ERR;
}
/* FIXME: Hardcoded for 16bits */
- err = snd_pcm_hw_params_set_format(ctx->capture_handle,
+ ret = snd_pcm_hw_params_set_format(ctx->capture_handle,
ctx->hw_params, SND_PCM_FORMAT_S16_LE);
- if (err < 0) {
- sr_err("alsa: can't set sample format (%s)", snd_strerror(err));
+ if (ret < 0) {
+ sr_err("alsa: can't set sample format (%s)", snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_hw_params_set_rate_near(ctx->capture_handle,
+ ret = snd_pcm_hw_params_set_rate_near(ctx->capture_handle,
ctx->hw_params, (unsigned int *)&ctx->cur_rate, 0);
- if (err < 0) {
- sr_err("alsa: can't set sample rate (%s)", snd_strerror(err));
+ if (ret < 0) {
+ sr_err("alsa: can't set sample rate (%s)", snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_hw_params_set_channels(ctx->capture_handle,
+ ret = snd_pcm_hw_params_set_channels(ctx->capture_handle,
ctx->hw_params, NUM_PROBES);
- if (err < 0) {
- sr_err("alsa: can't set channel count (%s)", snd_strerror(err));
+ if (ret < 0) {
+ sr_err("alsa: can't set channel count (%s)", snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_hw_params(ctx->capture_handle, ctx->hw_params);
- if (err < 0) {
- sr_err("alsa: can't set parameters (%s)", snd_strerror(err));
+ ret = snd_pcm_hw_params(ctx->capture_handle, ctx->hw_params);
+ if (ret < 0) {
+ sr_err("alsa: can't set parameters (%s)", snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_prepare(ctx->capture_handle);
- if (err < 0) {
+ ret = snd_pcm_prepare(ctx->capture_handle);
+ if (ret < 0) {
sr_err("alsa: can't prepare audio interface for use (%s)",
- snd_strerror(err));
+ snd_strerror(ret));
return SR_ERR;
}
return SR_ERR_MALLOC;
}
- err = snd_pcm_poll_descriptors(ctx->capture_handle, ufds, count);
- if (err < 0) {
+ ret = snd_pcm_poll_descriptors(ctx->capture_handle, ufds, count);
+ if (ret < 0) {
sr_err("alsa: Unable to obtain poll descriptors (%s)",
- snd_strerror(err));
+ snd_strerror(ret));
g_free(ufds);
return SR_ERR;
}
- ctx->session_id = session_dev_id;
+ ctx->session_dev_id = cb_data;
sr_source_add(ufds[0].fd, ufds[0].events, 10, receive_data, sdi);
packet.type = SR_DF_HEADER;
header.num_analog_probes = NUM_PROBES;
header.num_logic_probes = 0;
header.protocol_id = SR_PROTO_RAW;
- sr_session_bus(session_dev_id, &packet);
+ sr_session_send(cb_data, &packet);
g_free(ufds);
return SR_OK;
}
-static int hw_dev_acquisition_stop(int dev_index, gpointer session_dev_id)
+/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
+static int hw_dev_acquisition_stop(int dev_index, void *cb_data)
{
/* Avoid compiler warnings. */
- dev_index = dev_index;
- session_dev_id = session_dev_id;
+ (void)dev_index;
+ (void)cb_data;
return SR_OK;
}
-SR_PRIV struct sr_dev_plugin alsa_plugin_info = {
+SR_PRIV struct sr_dev_driver alsa_driver_info = {
.name = "alsa",
.longname = "ALSA driver",
.api_version = 1,
projects / libsigrok.git / blobdiff