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/*
* Copyright (C) 2018 "IoT.bzh"
* Author Fulup Ar Foll <fulup@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#define _GNU_SOURCE // needed for vasprintf
#include "alsa-softmixer.h"
#include <stdarg.h>
PUBLIC json_object *AlsaDumpObjF(const char *format, ...) {
assert (format);
va_list args;
char *result;
va_start(args, format);
int error= vasprintf(&result, format, args);
va_end(args);
if (error < 0) return NULL;
return (json_object_new_string(result));
}
PUBLIC char *AlsaDumpPcmUid(snd_pcm_t *pcmHandle, char *buffer, size_t len) {
snd_pcm_info_t *pcmInfo;
snd_pcm_info_alloca(&pcmInfo);
// retrieve PCM name for error/debug
int error = snd_pcm_info(pcmHandle, pcmInfo);
if (error) goto OnErrorExit;
int pcmCard = snd_pcm_info_get_card(pcmInfo);
const char *pcmName = snd_pcm_info_get_name(pcmInfo);
snprintf(buffer, len, "hw:%i [%s](%i,%i)", pcmCard, pcmName, snd_pcm_info_get_device(pcmInfo), snd_pcm_info_get_subdevice(pcmInfo));
return buffer;
OnErrorExit:
return NULL;
}
PUBLIC char *AlsaDumpCtlUid(snd_ctl_t *ctlHandle, char *buffer, size_t len) {
snd_ctl_card_info_t *ctlInfo;
snd_ctl_card_info_alloca(&ctlInfo);
// retrieve PCM name for error/debug
int error = snd_ctl_card_info(ctlHandle, ctlInfo);
if (error) goto OnErrorExit;
const char *ctlId = snd_ctl_card_info_get_id(ctlInfo);
const char *ctlName = snd_ctl_card_info_get_name(ctlInfo);
snprintf(buffer, len, "hw:%s [%s]", ctlId, ctlName);
return buffer;
OnErrorExit:
return NULL;
}
PUBLIC void AlsaDumpFormats(SoftMixerT *mixer, snd_pcm_t *pcm) {
char string[32];
int ret;
snd_pcm_format_t format;
snd_pcm_hw_params_t *pxmHwParams;
// retrieve hardware config from PCM
snd_pcm_hw_params_alloca(&pxmHwParams);
ret = snd_pcm_hw_params_any(pcm, pxmHwParams);
if (ret < 0) {
AFB_ApiError(mixer->api, "FAILED to read params of PCM %s", snd_pcm_name(pcm));
}
AFB_ApiDebug(mixer->api, "Available formats: PCM=%s", ALSA_PCM_UID(pcm, string));
for (format = 0; format <= SND_PCM_FORMAT_LAST; format++) {
if (snd_pcm_hw_params_test_format(pcm, pxmHwParams, format) == 0) {
AFB_ApiDebug(mixer->api, "- %s", snd_pcm_format_name(format));
}
}
}
PUBLIC void AlsaDumpCtlSubdev(SoftMixerT *mixer, snd_ctl_t *handle) {
snd_ctl_card_info_t *cardInfo;
int err;
int dev = -1;
snd_pcm_info_t *pcminfo;
snd_pcm_info_alloca(&pcminfo);
unsigned int subdevCount, subdevAvail;
snd_ctl_card_info_alloca(&cardInfo);
snd_ctl_card_info(handle, cardInfo);
int cardIndex = snd_ctl_card_info_get_card(cardInfo);
const char *cardId = snd_ctl_card_info_get_id(cardInfo);
const char *cardName = snd_ctl_card_info_get_name(cardInfo);
// loop on every sndcard devices
while (1) {
if (snd_ctl_pcm_next_device(handle, &dev) < 0) {
AFB_ApiError(mixer->api, "%s: fail to open subdev card id=%s name=%s", __func__, cardId, cardName);
goto OnErrorExit;
}
// no more devices
if (dev < 0) break;
// ignore empty device slot
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
if (err != -ENOENT)
AFB_ApiError(mixer->api, "%s: control digital audio info (%s): %s", __func__, cardName, snd_strerror(err));
continue;
}
AFB_ApiDebug(mixer->api,
"%s card %d: %s [%s], device %d: %s [%s]",
__func__, cardIndex, cardId, cardName, dev, snd_pcm_info_get_id(pcminfo), snd_pcm_info_get_name(pcminfo));
// loop on subdevices
subdevCount = snd_pcm_info_get_subdevices_count(pcminfo);
subdevAvail = snd_pcm_info_get_subdevices_avail(pcminfo);
for (unsigned int idx = 0; idx < subdevCount; idx++) {
snd_pcm_info_set_subdevice(pcminfo, idx);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
AFB_ApiError(mixer->api, "%s: control digital audio playback info %i: %s", __func__, cardIndex, snd_strerror(err));
} else {
AFB_ApiDebug(mixer->api, "%s: -- Subdevice #%d: %s", __func__, idx, snd_pcm_info_get_subdevice_name(pcminfo));
}
}
AFB_ApiDebug(mixer->api, "%s => subdevice count=%d avaliable=%d", __func__, subdevCount, subdevAvail);
}
return;
OnErrorExit:
return;
}
PUBLIC void AlsaDumpPcmParams(SoftMixerT *mixer, snd_pcm_hw_params_t *pcmHwParams) {
snd_output_t *output;
char *buffer;
snd_output_buffer_open(&output);
snd_pcm_hw_params_dump(pcmHwParams, output);
snd_output_buffer_string(output, &buffer);
AFB_ApiDebug(mixer->api, "%s:\n--------------\n%s\n-------------",__func__, buffer);
snd_output_close(output);
}
PUBLIC void AlsaDumpPcmInfo(SoftMixerT *mixer, const char* info, snd_pcm_t *pcm) {
snd_output_t *out;
char *buffer;
// create an output buffer an dump PCM config
snd_output_buffer_open(&out);
snd_output_printf(out, "%s", info);
snd_output_printf(out, ":\n");
snd_pcm_dump(pcm, out);
snd_output_buffer_string(out, &buffer);
AFB_ApiDebug(mixer->api, "%s:\n%s", __func__, buffer);
snd_output_close(out);
}
PUBLIC void AlsaDumpElemConfig(SoftMixerT *mixer, const char* info, const char* elem) {
snd_config_update();
snd_config_t *pcmConfig;
snd_config_search(snd_config, elem, &pcmConfig);
AlsaDumpCtlConfig(mixer, info, pcmConfig, 1);
}
PUBLIC void AlsaDumpCtlConfig(SoftMixerT *mixer, const char* info, snd_config_t *config, int indent) {
snd_config_iterator_t it, next;
if (!config) {
AFB_ApiDebug(mixer->api,"%s (%s): no config", __func__, info);
return;
}
// hugly hack to get minimalist indentation
char *pretty = alloca(indent + 1);
for (int idx = 0; idx < indent; idx++) pretty[idx] = '-';
pretty[indent] = '\0';
snd_config_for_each(it, next, config) {
snd_config_t *node = snd_config_iterator_entry(it);
const char *key;
// ignore comment en empty lines
if (snd_config_get_id(node, &key) < 0) continue;
switch (snd_config_get_type(node)) {
long valueI;
double valueD;
const char *valueS;
case SND_CONFIG_TYPE_INTEGER:
snd_config_get_integer(node, &valueI);
AFB_ApiDebug(mixer->api, "%s: %s %s: %d (int)", info, pretty, key, (int) valueI);
break;
case SND_CONFIG_TYPE_REAL:
snd_config_get_real(node, &valueD);
AFB_ApiDebug(mixer->api, "%s: %s %s: %.2f (float)", info, pretty, key, valueD);
break;
case SND_CONFIG_TYPE_STRING:
snd_config_get_string(node, &valueS);
AFB_ApiDebug(mixer->api, "%s: %s %s: %s (str)", info, pretty, key, valueS);
break;
case SND_CONFIG_TYPE_COMPOUND:
AFB_ApiDebug(mixer->api, "%s: %s %s { ", info, pretty, key);
AlsaDumpCtlConfig(mixer, info, node, indent + 2);
AFB_ApiDebug(mixer->api, "%s: %s } ", info, pretty);
break;
default:
snd_config_get_string(node, &valueS);
AFB_ApiDebug(mixer->api, "%s: %s: key=%s unknown=%s", info, pretty, key, valueS);
break;
}
}
}
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