*handle = ctl; filename等于"/dev/snd/pcmC0D0p" ==> fd = snd_open_device(filename, fmode); ==> return snd_pcm_hw_open_fd(pcmp, name, fd, 0, sync_ptr_ioctl); ==> snd_pcm_new(&pcm, SND_PCM_TYPE_HW, name, info.stream, mode); pcm->ops = &snd_pcm_hw_ops; pcm->fas...
static struct snd_soc_dai_link s3c24xx_uda134x_dai_link = { .name = "UDA134X", .stream_name = "UDA134X", .codec_dai = &uda134x_dai, .cpu_dai = &s3c24xx_i2s_dai, .ops = &s3c24xx_uda134x_ops, };
int snd_pcm_open(snd_pcm_t **pcmp, const char *name, snd_pcm_stream_t stream, int mode){ snd_config_t *top; int err; assert(pcmp && name); if (_snd_is_ucm_device(name)) { name = uc_mgr_alibcfg_by_device(&top, name); if (name == NULL) return -ENODEV; } else { ...
==> snd_pcm_open(&handle, pcm_name, stream, open_mode); //打开一路pcm,刷新config配置 如果是"default",同时type等于SND_CONFIG_TYPE_COMPOUND那么这里对应"empty" static const char *const build_in_pcms[] = { "adpcm", "alaw", "copy", "dmix", "file", "hooks", "hw", "ladspa", "...
(pcmp,name,root,conf,stream,mode);==>open_func=snd_dlobj_cache_lookup(open_name);将获得lib库中_snd_pcm_empty_open函数 所以open_func将等于_snd_pcm_empty_open _snd_pcm_empty_open _snd_pcm_asym_open _snd_pcm_plug_open _snd_pcm_softvol_open _snd_pcm_dmix_open _snd_pcm_hw_open =...
name ASCII identifier of the PCM handle stream Wanted stream mode Open mode (see SND_PCM_NONBLOCK, SND_PCM_ASYNC) Returns 0 on success otherwise a negative error code Examples /test/latency.c, /test/pcm.c, and /test/pcm_min.c.
PATH=/sbin:/usr/sbin:/bin:/usr/bin DESC="Audio capture to a pipe" # Introduce a short description here NAME=cpiped # Introduce the short server's name here DAEMON=/usr/local/bin/cpiped # Introduce the server's location here DAEMON_ARGS="-D /tmp/snapfifo" # Edit this! PIDFILE=/...
post("opened input device name %s", devname); alsa_nindev++; }for(iodev =0; iodev < naudiooutdev; iodev++) { alsa_numbertoname(audiooutdev[iodev], devname,512); err =snd_pcm_open(&alsa_outdev[alsa_noutdev].a_handle, devname, ...
==> snd_pcm_open(&handle, pcm_name, stream, open_mode); //打开一路pcm,刷新config配置 如果是"default",同时type等于SND_CONFIG_TYPE_COMPOUND那么这里对应"empty" static const char *const build_in_pcms[] = { "adpcm", "alaw", "copy", "dmix", "file", "hooks", "hw", "ladspa", "...
alsa声卡/dev/snd/pcmC0D0p的open打开流程原文地址:/space.php?uid=20564848&do=blog&cuid=2116725aplay.c= main= snd_pcm_open(&handle, pcm_name, stream, open_mode); / 打开一路pcm,刷新config配置如果是default,同时type等于SND_CONFIG_TYPE_COMPOUND那么这里对应emptystatic const char *const build_in...