Lines Matching full:pcm
8 Tracepoints in ALSA PCM core
11 ALSA PCM core registers ``snd_pcm`` subsystem to kernel tracepoint system.
12 This subsystem includes two categories of tracepoints; for state of PCM buffer
13 and for processing of PCM hardware parameters. These tracepoints are available
18 Tracepoints for state of PCM buffer
24 Tracepoints for processing of PCM hardware parameters
30 In a design of ALSA PCM core, data transmission is abstracted as PCM substream.
31 Applications manage PCM substream to maintain data transmission for PCM frames.
32 Before starting the data transmission, applications need to configure PCM
33 substream. In this procedure, PCM hardware parameters are decided by
34 interaction between applications and ALSA PCM core. Once decided, runtime of
35 the PCM substream keeps the parameters.
46 Configurable. ALSA PCM core and some drivers handle this flag to select
50 struct snd_mask and represent mask values. As of PCM protocol
59 PCM protocol v2.0.13, twelve types are defined.
76 mask/interval parameter can be changed by ALSA PCM core. For
88 configure PCM substream.
91 a PCM sample. When a parameter of SNDRV_PCM_HW_PARAM_SAMPLE_BITS was
113 ALSA PCM core handles buffer of struct snd_pcm_hw_params when
120 to compute the target parameter. ALSA PCM core registers some rules to the
138 mask/interval parameters. When ALSA PCM core changes them, ``hw_mask_param`` or
141 ALSA PCM core also has a pretty print format for each of the tracepoints. Below
155 The first three fields are common. They represent name of ALSA PCM character
159 means that the parameter is changed by ALSA PCM core, regardless of the rules.