X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Falsa%2Falsa.c;h=94a95723adc4eea6ddd06df3a5c980f70ada848b;hb=5097b0d0912165429aceddb5febbf68467b623f5;hp=2ff25f2b5a1eba08d6959428f6637ca4b35d0eb9;hpb=e46b8fb154ba90ffec9c1f805399dfa819e736f9;p=libsigrok.git diff --git a/hardware/alsa/alsa.c b/hardware/alsa/alsa.c index 2ff25f2b..94a95723 100644 --- a/hardware/alsa/alsa.c +++ b/hardware/alsa/alsa.c @@ -18,24 +18,43 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +/* Note: This driver doesn't compile, analog support in sigrok is WIP. */ + #include #include #include -#include #include -#include "config.h" +#include "sigrok.h" +#include "sigrok-internal.h" #define NUM_PROBES 2 #define SAMPLE_WIDTH 16 #define AUDIO_DEV "plughw:0,0" -static int capabilities[] = { - HWCAP_SAMPLERATE, - HWCAP_LIMIT_SAMPLES, - HWCAP_CONTINUOUS, +struct sr_analog_probe { + uint8_t att; + uint8_t res; /* Needs to be a power of 2, FIXME */ + uint16_t val; /* Max hardware ADC width is 16bits */ +}; + +struct sr_analog_sample { + uint8_t num_probes; /* Max hardware probes is 256 */ + struct sr_analog_probe probes[]; +}; + +static int hwcaps[] = { + SR_HWCAP_SAMPLERATE, + SR_HWCAP_LIMIT_SAMPLES, + SR_HWCAP_CONTINUOUS, +}; + +static const char *probe_names[NUM_PROBES + 1] = { + "0", + "1", + NULL, }; -static GSList *device_instances = NULL; +static GSList *dev_insts = NULL; struct alsa { uint64_t cur_rate; @@ -45,153 +64,167 @@ struct alsa { gpointer session_id; }; -static int hw_init(char *deviceinfo) +static int hw_init(const char *devinfo) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; struct alsa *alsa; /* Avoid compiler warnings. */ - deviceinfo = deviceinfo; + devinfo = devinfo; - alsa = malloc(sizeof(struct alsa)); - if (!alsa) + if (!(alsa = g_try_malloc0(sizeof(struct alsa)))) { + sr_err("alsa: %s: alsa malloc failed", __func__); return 0; - memset(alsa, 0, sizeof(struct alsa)); + } - sdi = sigrok_device_instance_new(0, ST_ACTIVE, "alsa", NULL, NULL); + sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL); if (!sdi) goto free_alsa; sdi->priv = alsa; - device_instances = g_slist_append(device_instances, sdi); + dev_insts = g_slist_append(dev_insts, sdi); return 1; + free_alsa: - free(alsa); + g_free(alsa); return 0; } -static int hw_opendev(int device_index) +static int hw_opendev(int dev_index) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; struct alsa *alsa; int err; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) + if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) return SR_ERR; alsa = sdi->priv; err = snd_pcm_open(&alsa->capture_handle, AUDIO_DEV, SND_PCM_STREAM_CAPTURE, 0); if (err < 0) { - g_warning("cannot open audio device %s (%s)", AUDIO_DEV, - snd_strerror(err)); + sr_err("alsa: can't open audio device %s (%s)", AUDIO_DEV, + snd_strerror(err)); return SR_ERR; } err = snd_pcm_hw_params_malloc(&alsa->hw_params); if (err < 0) { - g_warning("cannot allocate hardware parameter structure (%s)", - snd_strerror(err)); + sr_err("alsa: can't allocate hardware parameter structure (%s)", + snd_strerror(err)); return SR_ERR; } err = snd_pcm_hw_params_any(alsa->capture_handle, alsa->hw_params); if (err < 0) { - g_warning("cannot initialize hardware parameter structure (%s)", - snd_strerror(err)); + sr_err("alsa: can't initialize hardware parameter structure " + "(%s)", snd_strerror(err)); return SR_ERR; } return SR_OK; } -static void hw_closedev(int device_index) +static int hw_closedev(int dev_index) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; struct alsa *alsa; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) - return; - alsa = sdi->priv; - if (!alsa) - return; + 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? */ + } + if (!(alsa = sdi->priv)) { + sr_err("alsa: %s: sdi->priv was NULL", __func__); + return SR_ERR; /* TODO: SR_ERR_ARG? */ + } + + // 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); + + return SR_OK; } -static void hw_cleanup(void) +static int hw_cleanup(void) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; - if (!(sdi = get_sigrok_device_instance(device_instances, 0))) - return; + if (!(sdi = sr_dev_inst_get(dev_insts, 0))) { + sr_err("alsa: %s: sdi was NULL", __func__); + return SR_ERR_BUG; + } + + sr_dev_inst_free(sdi); - free(sdi->priv); - sigrok_device_instance_free(sdi); + return SR_OK; } -static void *hw_get_device_info(int device_index, int device_info_id) +static void *hw_dev_info_get(int dev_index, int dev_info_id) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; struct alsa *alsa; void *info = NULL; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) + if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) return NULL; alsa = sdi->priv; - switch (device_info_id) { - case DI_INSTANCE: + switch (dev_info_id) { + case SR_DI_INST: info = sdi; break; - case DI_NUM_PROBES: + case SR_DI_NUM_PROBES: info = GINT_TO_POINTER(NUM_PROBES); break; - case DI_CUR_SAMPLERATE: + case SR_DI_PROBE_NAMES: + info = probe_names; + break; + case SR_DI_CUR_SAMPLERATE: info = &alsa->cur_rate; break; - // case DI_PROBE_TYPE: - // info = GINT_TO_POINTER(PROBE_TYPE_ANALOG); + // case SR_DI_PROBE_TYPE: + // info = GINT_TO_POINTER(SR_PROBE_TYPE_ANALOG); // break; } return info; } -static int hw_get_status(int device_index) +static int hw_get_status(int dev_index) { /* Avoid compiler warnings. */ - device_index = device_index; + dev_index = dev_index; - return ST_ACTIVE; + return SR_ST_ACTIVE; } -static int *hw_get_capabilities(void) +static 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_config_set(int dev_index, int hwcap, void *value) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; struct alsa *alsa; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) + if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) return SR_ERR; alsa = sdi->priv; - switch (capability) { - case HWCAP_PROBECONFIG: + switch (hwcap) { + case SR_HWCAP_PROBECONFIG: return SR_OK; - case HWCAP_SAMPLERATE: + case SR_HWCAP_SAMPLERATE: alsa->cur_rate = *(uint64_t *) value; return SR_OK; - case HWCAP_LIMIT_SAMPLES: + case SR_HWCAP_LIMIT_SAMPLES: alsa->limit_samples = *(uint64_t *) value; return SR_OK; default: @@ -201,12 +234,12 @@ static int hw_set_configuration(int device_index, int capability, void *value) static int receive_data(int fd, int revents, void *user_data) { - struct sigrok_device_instance *sdi = user_data; + struct sr_dev_inst *sdi = user_data; struct alsa *alsa = sdi->priv; - struct datafeed_packet packet; - struct analog_sample *sample; - unsigned int sample_size = sizeof(struct analog_sample) + - (NUM_PROBES * sizeof(struct analog_probe)); + struct sr_datafeed_packet packet; + struct sr_analog_sample *sample; + unsigned int sample_size = sizeof(struct sr_analog_sample) + + (NUM_PROBES * sizeof(struct sr_analog_probe)); char *outb; char inb[4096]; int i, x, count; @@ -219,16 +252,17 @@ static int receive_data(int fd, int revents, void *user_data) count = snd_pcm_readi(alsa->capture_handle, inb, MIN(4096/4, alsa->limit_samples)); if (count < 1) { - g_warning("Failed to read samples"); + sr_err("alsa: Failed to read samples"); return FALSE; } - outb = malloc(sample_size * count); - if (!outb) + if (!(outb = g_try_malloc(sample_size * count))) { + sr_err("alsa: %s: outb malloc failed", __func__); return FALSE; + } for (i = 0; i < count; i++) { - sample = (struct analog_sample *) + sample = (struct sr_analog_sample *) (outb + (i * sample_size)); sample->num_probes = NUM_PROBES; @@ -240,40 +274,40 @@ static int receive_data(int fd, int revents, void *user_data) } } - packet.type = DF_ANALOG; + packet.type = SR_DF_ANALOG; packet.length = count * sample_size; packet.unitsize = sample_size; packet.payload = outb; - session_bus(user_data, &packet); - free(outb); + sr_session_bus(user_data, &packet); + g_free(outb); alsa->limit_samples -= count; } while (alsa->limit_samples > 0); - packet.type = DF_END; - session_bus(user_data, &packet); + packet.type = SR_DF_END; + sr_session_bus(user_data, &packet); return TRUE; } -static int hw_start_acquisition(int device_index, gpointer session_device_id) +static int hw_start_acquisition(int dev_index, gpointer session_dev_id) { - struct sigrok_device_instance *sdi; + struct sr_dev_inst *sdi; struct alsa *alsa; - struct datafeed_packet packet; - struct datafeed_header header; + struct sr_datafeed_packet packet; + struct sr_datafeed_header header; struct pollfd *ufds; int count; int err; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) + if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) return SR_ERR; alsa = sdi->priv; err = snd_pcm_hw_params_set_access(alsa->capture_handle, alsa->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); if (err < 0) { - g_warning("cannot set access type (%s)", snd_strerror(err)); + sr_err("alsa: can't set access type (%s)", snd_strerror(err)); return SR_ERR; } @@ -281,91 +315,95 @@ static int hw_start_acquisition(int device_index, gpointer session_device_id) err = snd_pcm_hw_params_set_format(alsa->capture_handle, alsa->hw_params, SND_PCM_FORMAT_S16_LE); if (err < 0) { - g_warning("cannot set sample format (%s)", snd_strerror(err)); + sr_err("alsa: can't set sample format (%s)", snd_strerror(err)); 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) { - g_warning("cannot set sample rate (%s)", snd_strerror(err)); + sr_err("alsa: can't set sample rate (%s)", snd_strerror(err)); return SR_ERR; } err = snd_pcm_hw_params_set_channels(alsa->capture_handle, alsa->hw_params, NUM_PROBES); if (err < 0) { - g_warning("cannot set channel count (%s)", snd_strerror(err)); + sr_err("alsa: can't set channel count (%s)", snd_strerror(err)); return SR_ERR; } err = snd_pcm_hw_params(alsa->capture_handle, alsa->hw_params); if (err < 0) { - g_warning("cannot set parameters (%s)", snd_strerror(err)); + sr_err("alsa: can't set parameters (%s)", snd_strerror(err)); return SR_ERR; } err = snd_pcm_prepare(alsa->capture_handle); if (err < 0) { - g_warning("cannot prepare audio interface for use (%s)", - snd_strerror(err)); + sr_err("alsa: can't prepare audio interface for use (%s)", + snd_strerror(err)); return SR_ERR; } count = snd_pcm_poll_descriptors_count(alsa->capture_handle); if (count < 1) { - g_warning("Unable to obtain poll descriptors count"); + sr_err("alsa: Unable to obtain poll descriptors count"); return SR_ERR; } - ufds = malloc(count * sizeof(struct pollfd)); - if (!ufds) + if (!(ufds = g_try_malloc(count * sizeof(struct pollfd)))) { + sr_err("alsa: %s: ufds malloc failed", __func__); return SR_ERR_MALLOC; + } err = snd_pcm_poll_descriptors(alsa->capture_handle, ufds, count); if (err < 0) { - g_warning("Unable to obtain poll descriptors (%s)", - snd_strerror(err)); - free(ufds); + sr_err("alsa: Unable to obtain poll descriptors (%s)", + snd_strerror(err)); + g_free(ufds); return SR_ERR; } - alsa->session_id = session_device_id; - source_add(ufds[0].fd, ufds[0].events, 10, receive_data, sdi); + alsa->session_id = session_dev_id; + sr_source_add(ufds[0].fd, ufds[0].events, 10, receive_data, sdi); - packet.type = DF_HEADER; - packet.length = sizeof(struct datafeed_header); + packet.type = SR_DF_HEADER; + packet.length = sizeof(struct sr_datafeed_header); packet.payload = (unsigned char *) &header; header.feed_version = 1; gettimeofday(&header.starttime, NULL); header.samplerate = alsa->cur_rate; header.num_analog_probes = NUM_PROBES; header.num_logic_probes = 0; - header.protocol_id = PROTO_RAW; - session_bus(session_device_id, &packet); - free(ufds); + header.protocol_id = SR_PROTO_RAW; + sr_session_bus(session_dev_id, &packet); + g_free(ufds); return SR_OK; } -static void hw_stop_acquisition(int device_index, gpointer session_device_id) +static int hw_stop_acquisition(int dev_index, gpointer session_dev_id) { /* Avoid compiler warnings. */ - device_index = device_index; - session_device_id = session_device_id; + dev_index = dev_index; + session_dev_id = session_dev_id; + + return SR_OK; } -struct device_plugin alsa_plugin_info = { - "alsa", - 1, - hw_init, - hw_cleanup, - hw_opendev, - hw_closedev, - hw_get_device_info, - hw_get_status, - hw_get_capabilities, - hw_set_configuration, - hw_start_acquisition, - hw_stop_acquisition, +SR_PRIV struct sr_dev_plugin alsa_plugin_info = { + .name = "alsa", + .longname = "ALSA driver", + .api_version = 1, + .init = hw_init, + .cleanup = hw_cleanup, + .opendev = hw_opendev, + .closedev = hw_closedev, + .dev_info_get = hw_dev_info_get, + .get_status = hw_get_status, + .hwcap_get_all = hw_hwcap_get_all, + .config_set = hw_config_set, + .start_acquisition = hw_start_acquisition, + .stop_acquisition = hw_stop_acquisition, };