struct sr_analog_probe probes[];
};
-static int capabilities[] = {
+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",
NULL,
};
-static GSList *device_instances = NULL;
+static GSList *dev_insts = NULL;
-struct alsa {
+/* Private, per-device-instance driver context. */
+struct context {
uint64_t cur_rate;
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 *deviceinfo)
+static int hw_init(const char *devinfo)
{
- struct sr_device_instance *sdi;
- struct alsa *alsa;
+ struct sr_dev_inst *sdi;
+ struct context *ctx;
/* Avoid compiler warnings. */
- deviceinfo = deviceinfo;
+ (void)devinfo;
- if (!(alsa = g_try_malloc0(sizeof(struct alsa)))) {
- sr_err("alsa: %s: alsa malloc failed", __func__);
+ if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
+ sr_err("alsa: %s: ctx malloc failed", __func__);
return 0;
}
- sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL);
- if (!sdi)
- goto free_alsa;
+ if (!(sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL))) {
+ sr_err("alsa: %s: sdi was NULL", __func__);
+ goto free_ctx;
+ }
- sdi->priv = alsa;
+ sdi->priv = ctx;
- device_instances = g_slist_append(device_instances, sdi);
+ dev_insts = g_slist_append(dev_insts, sdi);
return 1;
-free_alsa:
- g_free(alsa);
+
+free_ctx:
+ g_free(ctx);
return 0;
}
-static int hw_opendev(int device_index)
+static int hw_dev_open(int dev_index)
{
- struct sr_device_instance *sdi;
- struct alsa *alsa;
- int err;
+ struct sr_dev_inst *sdi;
+ struct context *ctx;
+ int ret;
- if (!(sdi = sr_dev_inst_get(device_instances, device_index)))
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
return SR_ERR;
- alsa = sdi->priv;
+ ctx = sdi->priv;
- err = snd_pcm_open(&alsa->capture_handle, AUDIO_DEV,
- SND_PCM_STREAM_CAPTURE, 0);
- if (err < 0) {
+ ret = snd_pcm_open(&ctx->capture_handle, AUDIO_DEV,
+ SND_PCM_STREAM_CAPTURE, 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(&alsa->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));
+ snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_hw_params_any(alsa->capture_handle, alsa->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;
}
return SR_OK;
}
-static int hw_closedev(int device_index)
+static int hw_dev_close(int dev_index)
{
- struct sr_device_instance *sdi;
- struct alsa *alsa;
+ struct sr_dev_inst *sdi;
+ struct context *ctx;
- if (!(sdi = sr_dev_inst_get(device_instances, device_index))) {
+ 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 (!(alsa = sdi->priv)) {
+ 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_*?
- if (alsa->hw_params)
- snd_pcm_hw_params_free(alsa->hw_params);
- if (alsa->capture_handle)
- snd_pcm_close(alsa->capture_handle);
+ if (ctx->hw_params)
+ snd_pcm_hw_params_free(ctx->hw_params);
+ if (ctx->capture_handle)
+ snd_pcm_close(ctx->capture_handle);
return SR_OK;
}
static int hw_cleanup(void)
{
- struct sr_device_instance *sdi;
+ struct sr_dev_inst *sdi;
- if (!(sdi = sr_dev_inst_get(device_instances, 0))) {
+ if (!(sdi = sr_dev_inst_get(dev_insts, 0))) {
sr_err("alsa: %s: sdi was NULL", __func__);
return SR_ERR_BUG;
}
return SR_OK;
}
-static void *hw_get_device_info(int device_index, int device_info_id)
+static const void *hw_dev_info_get(int dev_index, int dev_info_id)
{
- struct sr_device_instance *sdi;
- struct alsa *alsa;
+ struct sr_dev_inst *sdi;
+ struct context *ctx;
void *info = NULL;
- if (!(sdi = sr_dev_inst_get(device_instances, device_index)))
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
return NULL;
- alsa = sdi->priv;
+ ctx = sdi->priv;
- switch (device_info_id) {
- case SR_DI_INSTANCE:
+ switch (dev_info_id) {
+ case SR_DI_INST:
info = sdi;
break;
case SR_DI_NUM_PROBES:
info = probe_names;
break;
case SR_DI_CUR_SAMPLERATE:
- info = &alsa->cur_rate;
+ info = &ctx->cur_rate;
break;
// case SR_DI_PROBE_TYPE:
// info = GINT_TO_POINTER(SR_PROBE_TYPE_ANALOG);
return info;
}
-static int hw_get_status(int device_index)
+static int hw_dev_status_get(int dev_index)
{
/* Avoid compiler warnings. */
- device_index = device_index;
+ dev_index = dev_index;
return SR_ST_ACTIVE;
}
-static int *hw_get_capabilities(void)
+static const int *hw_hwcap_get_all(void)
{
- return capabilities;
+ return hwcaps;
}
-static int hw_set_configuration(int device_index, int capability, void *value)
+static int hw_dev_config_set(int dev_index, int hwcap, const void *value)
{
- struct sr_device_instance *sdi;
- struct alsa *alsa;
+ struct sr_dev_inst *sdi;
+ struct context *ctx;
- if (!(sdi = sr_dev_inst_get(device_instances, device_index)))
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
return SR_ERR;
- alsa = sdi->priv;
+ ctx = sdi->priv;
- switch (capability) {
+ switch (hwcap) {
case SR_HWCAP_PROBECONFIG:
return SR_OK;
case SR_HWCAP_SAMPLERATE:
- alsa->cur_rate = *(uint64_t *) value;
+ ctx->cur_rate = *(const uint64_t *)value;
return SR_OK;
case SR_HWCAP_LIMIT_SAMPLES:
- alsa->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_device_instance *sdi = user_data;
- struct alsa *alsa = sdi->priv;
+ struct sr_dev_inst *sdi = cb_data;
+ struct context *ctx = sdi->priv;
struct sr_datafeed_packet packet;
struct sr_analog_sample *sample;
unsigned int sample_size = sizeof(struct sr_analog_sample) +
do {
memset(inb, 0, sizeof(inb));
- count = snd_pcm_readi(alsa->capture_handle, inb,
- MIN(4096/4, alsa->limit_samples));
+ count = snd_pcm_readi(ctx->capture_handle, inb,
+ MIN(4096 / 4, ctx->limit_samples));
if (count < 1) {
sr_err("alsa: Failed to read samples");
return FALSE;
for (x = 0; x < NUM_PROBES; x++) {
sample->probes[x].val =
- *(uint16_t *) (inb + (i * 4) + (x * 2));
+ *(uint16_t *)(inb + (i * 4) + (x * 2));
sample->probes[x].val &= ((1 << 16) - 1);
sample->probes[x].res = 16;
}
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);
- alsa->limit_samples -= count;
+ ctx->limit_samples -= count;
- } while (alsa->limit_samples > 0);
+ } 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_start_acquisition(int device_index, gpointer session_device_id)
+static int hw_dev_acquisition_start(int dev_index, void *cb_data)
{
- struct sr_device_instance *sdi;
- struct alsa *alsa;
+ struct sr_dev_inst *sdi;
+ struct context *ctx;
struct sr_datafeed_packet packet;
struct sr_datafeed_header header;
struct pollfd *ufds;
int count;
- int err;
+ int ret;
- if (!(sdi = sr_dev_inst_get(device_instances, device_index)))
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
return SR_ERR;
- alsa = sdi->priv;
+ ctx = sdi->priv;
- err = snd_pcm_hw_params_set_access(alsa->capture_handle,
- alsa->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
- if (err < 0) {
- sr_err("alsa: can't set access type (%s)", snd_strerror(err));
+ ret = snd_pcm_hw_params_set_access(ctx->capture_handle,
+ ctx->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
+ 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(alsa->capture_handle,
- alsa->hw_params, SND_PCM_FORMAT_S16_LE);
- if (err < 0) {
- sr_err("alsa: can't set sample format (%s)", snd_strerror(err));
+ ret = snd_pcm_hw_params_set_format(ctx->capture_handle,
+ ctx->hw_params, SND_PCM_FORMAT_S16_LE);
+ 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(alsa->capture_handle,
- alsa->hw_params, (unsigned int *) &alsa->cur_rate, 0);
- if (err < 0) {
- sr_err("alsa: can't set sample rate (%s)", snd_strerror(err));
+ ret = snd_pcm_hw_params_set_rate_near(ctx->capture_handle,
+ ctx->hw_params, (unsigned int *)&ctx->cur_rate, 0);
+ 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(alsa->capture_handle,
- alsa->hw_params, NUM_PROBES);
- if (err < 0) {
- sr_err("alsa: can't set channel count (%s)", snd_strerror(err));
+ ret = snd_pcm_hw_params_set_channels(ctx->capture_handle,
+ ctx->hw_params, NUM_PROBES);
+ if (ret < 0) {
+ sr_err("alsa: can't set channel count (%s)", snd_strerror(ret));
return SR_ERR;
}
- err = snd_pcm_hw_params(alsa->capture_handle, alsa->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(alsa->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;
}
- count = snd_pcm_poll_descriptors_count(alsa->capture_handle);
+ count = snd_pcm_poll_descriptors_count(ctx->capture_handle);
if (count < 1) {
sr_err("alsa: Unable to obtain poll descriptors count");
return SR_ERR;
return SR_ERR_MALLOC;
}
- err = snd_pcm_poll_descriptors(alsa->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;
}
- alsa->session_id = session_device_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;
packet.length = sizeof(struct sr_datafeed_header);
- packet.payload = (unsigned char *) &header;
+ packet.payload = (unsigned char *)&header;
header.feed_version = 1;
gettimeofday(&header.starttime, NULL);
- header.samplerate = alsa->cur_rate;
+ header.samplerate = ctx->cur_rate;
header.num_analog_probes = NUM_PROBES;
header.num_logic_probes = 0;
header.protocol_id = SR_PROTO_RAW;
- sr_session_bus(session_device_id, &packet);
+ sr_session_send(cb_data, &packet);
g_free(ufds);
return SR_OK;
}
-static int hw_stop_acquisition(int device_index, gpointer session_device_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. */
- device_index = device_index;
- session_device_id = session_device_id;
+ (void)dev_index;
+ (void)cb_data;
return SR_OK;
}
-SR_PRIV struct sr_device_plugin alsa_plugin_info = {
+SR_PRIV struct sr_dev_driver alsa_driver_info = {
.name = "alsa",
.longname = "ALSA driver",
.api_version = 1,
.init = hw_init,
.cleanup = hw_cleanup,
- .opendev = hw_opendev,
- .closedev = hw_closedev,
- .get_device_info = hw_get_device_info,
- .get_status = hw_get_status,
- .get_capabilities = hw_get_capabilities,
- .set_configuration = hw_set_configuration,
- .start_acquisition = hw_start_acquisition,
- .stop_acquisition = hw_stop_acquisition,
+ .dev_open = hw_dev_open,
+ .dev_close = hw_dev_close,
+ .dev_info_get = hw_dev_info_get,
+ .dev_status_get = hw_dev_status_get,
+ .hwcap_get_all = hw_hwcap_get_all,
+ .dev_config_set = hw_dev_config_set,
+ .dev_acquisition_start = hw_dev_acquisition_start,
+ .dev_acquisition_stop = hw_dev_acquisition_stop,
};