X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Falsa%2Falsa.c;h=527a7e5de49fa992521e61360e403475379f2b78;hb=c37d2b1ba12b62d63590509879bf58adf842896d;hp=68faa5db53a7b0bd16cbdc873912433aed331251;hpb=6ed4f0443730685b6a4a00b316384d751aa787e3;p=libsigrok.git diff --git a/hardware/alsa/alsa.c b/hardware/alsa/alsa.c index 68faa5db..527a7e5d 100644 --- a/hardware/alsa/alsa.c +++ b/hardware/alsa/alsa.c @@ -18,21 +18,28 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +#include "config.h" /* Must come before sigrok.h */ #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, + 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; @@ -45,20 +52,20 @@ struct alsa { gpointer session_id; }; -static int hw_init(char *deviceinfo) +static int hw_init(const char *deviceinfo) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *sdi; struct alsa *alsa; /* Avoid compiler warnings. */ deviceinfo = deviceinfo; - 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_device_instance_new(0, SR_ST_ACTIVE, "alsa", NULL, NULL); if (!sdi) goto free_alsa; @@ -68,96 +75,106 @@ static int hw_init(char *deviceinfo) return 1; free_alsa: - free(alsa); + g_free(alsa); return 0; } static int hw_opendev(int device_index) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *sdi; struct alsa *alsa; int err; - if (!(sdi = get_sigrok_device_instance(device_instances, 0))) - return SIGROK_ERR; + if (!(sdi = sr_get_device_instance(device_instances, device_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)); - return SIGROK_ERR; + sr_warn("cannot 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)); - return SIGROK_ERR; + sr_warn("cannot 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)", + sr_warn("cannot initialize hardware parameter structure (%s)", snd_strerror(err)); - return SIGROK_ERR; + return SR_ERR; } - return SIGROK_OK; + return SR_OK; } -static void hw_closedev(int device_index) +static int hw_closedev(int device_index) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *sdi; struct alsa *alsa; - if (!(sdi = get_sigrok_device_instance(device_instances, 0))) - return; - alsa = sdi->priv; - if (!alsa) - return; + if (!(sdi = sr_get_device_instance(device_instances, device_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) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *sdi; - if (!(sdi = get_sigrok_device_instance(device_instances, 0))) + if (!(sdi = sr_get_device_instance(device_instances, 0))) return; free(sdi->priv); - sigrok_device_instance_free(sdi); + sr_device_instance_free(sdi); } static void *hw_get_device_info(int device_index, int device_info_id) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *sdi; struct alsa *alsa; void *info = NULL; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) + if (!(sdi = sr_get_device_instance(device_instances, device_index))) return NULL; alsa = sdi->priv; switch (device_info_id) { - case DI_INSTANCE: + case SR_DI_INSTANCE: info = sdi; break; - case DI_NUM_PROBES: + case SR_DI_NUM_PROBES: info = GINT_TO_POINTER(NUM_PROBES); break; - case DI_CUR_SAMPLERATE: - info = &alsa->cur_rate; + case SR_DI_PROBE_NAMES: + info = probe_names; break; - case DI_PROBE_TYPE: - info = GINT_TO_POINTER(PROBE_TYPE_ANALOG); + case SR_DI_CUR_SAMPLERATE: + info = &alsa->cur_rate; break; + // case SR_DI_PROBE_TYPE: + // info = GINT_TO_POINTER(SR_PROBE_TYPE_ANALOG); + // break; } return info; @@ -168,7 +185,7 @@ static int hw_get_status(int device_index) /* Avoid compiler warnings. */ device_index = device_index; - return ST_ACTIVE; + return SR_ST_ACTIVE; } static int *hw_get_capabilities(void) @@ -178,142 +195,176 @@ static int *hw_get_capabilities(void) static int hw_set_configuration(int device_index, int capability, void *value) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *sdi; struct alsa *alsa; - if (!(sdi = get_sigrok_device_instance(device_instances, device_index))) - return SIGROK_ERR; + if (!(sdi = sr_get_device_instance(device_instances, device_index))) + return SR_ERR; alsa = sdi->priv; switch (capability) { - case HWCAP_PROBECONFIG: - return SIGROK_OK; - case HWCAP_SAMPLERATE: + case SR_HWCAP_PROBECONFIG: + return SR_OK; + case SR_HWCAP_SAMPLERATE: alsa->cur_rate = *(uint64_t *) value; - return SIGROK_OK; - case HWCAP_LIMIT_SAMPLES: + return SR_OK; + case SR_HWCAP_LIMIT_SAMPLES: alsa->limit_samples = *(uint64_t *) value; - return SIGROK_OK; + return SR_OK; default: - return SIGROK_ERR; + return SR_ERR; } } -/* - * FIXME: This is incomplete, i couldn't get poll() to work with alsa fds yet. - */ static int receive_data(int fd, int revents, void *user_data) { - struct sigrok_device_instance *sdi = user_data; + struct sr_device_instance *sdi = user_data; struct alsa *alsa = sdi->priv; - struct datafeed_packet packet; - char buf[128]; - int i, err; - - g_warning("entered receive_data"); + 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; + + fd = fd; + revents = revents; + + do { + memset(inb, 0, sizeof(inb)); + count = snd_pcm_readi(alsa->capture_handle, inb, + MIN(4096/4, alsa->limit_samples)); + if (count < 1) { + sr_warn("Failed to read samples"); + return FALSE; + } - for (i = 0; i < 10; i++) { - if ((err = snd_pcm_readi(alsa->capture_handle, buf, 128)) != 128) { - g_warning("read from audio interface failed (%s)\n", - snd_strerror(err)); + if (!(outb = g_try_malloc(sample_size * count))) { + sr_err("alsa: %s: outb malloc failed", __func__); return FALSE; } - g_warning("data read ok"); - } + + for (i = 0; i < count; i++) { + sample = (struct sr_analog_sample *) + (outb + (i * sample_size)); + sample->num_probes = NUM_PROBES; + + for (x = 0; x < NUM_PROBES; x++) { + sample->probes[x].val = + *(uint16_t *) (inb + (i * 4) + (x * 2)); + sample->probes[x].val &= ((1 << 16) - 1); + sample->probes[x].res = 16; + } + } + + packet.type = SR_DF_ANALOG; + packet.length = count * sample_size; + packet.unitsize = sample_size; + packet.payload = outb; + sr_session_bus(user_data, &packet); + g_free(outb); + alsa->limit_samples -= count; + + } while (alsa->limit_samples > 0); + + 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) { - struct sigrok_device_instance *sdi; + struct sr_device_instance *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))) - return SIGROK_ERR; + if (!(sdi = sr_get_device_instance(device_instances, device_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)); - return SIGROK_ERR; + sr_warn("cannot set access type (%s)", snd_strerror(err)); + 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) { - g_warning("cannot set sample format (%s)", snd_strerror(err)); - return SIGROK_ERR; + sr_warn("cannot 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)); - return SIGROK_ERR; + sr_warn("cannot 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)); - return SIGROK_ERR; + sr_warn("cannot 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)); - return SIGROK_ERR; + sr_warn("cannot 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)", + sr_warn("cannot prepare audio interface for use (%s)", snd_strerror(err)); - return SIGROK_ERR; + return SR_ERR; } count = snd_pcm_poll_descriptors_count(alsa->capture_handle); if (count < 1) { - g_warning("Unable to obtain poll descriptors count"); - return SIGROK_ERR; + sr_warn("Unable to obtain poll descriptors count"); + return SR_ERR; } - ufds = malloc(count * sizeof(struct pollfd)); - if (!ufds) - return SIGROK_ERR_MALLOC; + if (!(ufds = g_try_malloc(count * sizeof(struct pollfd)))) { + sr_warn("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)", + sr_warn("Unable to obtain poll descriptors (%s)", snd_strerror(err)); - free(ufds); - return SIGROK_ERR; + g_free(ufds); + return SR_ERR; } alsa->session_id = session_device_id; - source_add(ufds[0].fd, ufds[0].revents, -1, receive_data, sdi); + 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_device_id, &packet); + g_free(ufds); - return SIGROK_OK; + return SR_OK; } static void hw_stop_acquisition(int device_index, gpointer session_device_id) @@ -323,17 +374,18 @@ static void hw_stop_acquisition(int device_index, gpointer session_device_id) session_device_id = session_device_id; } -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, +struct sr_device_plugin alsa_plugin_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, };