ALSA: firewire-lib: move PCM substream constraint to AM824 layer
In IEC 61883-6, PCM frames are transferred in Multi Bit Linear Audio data
channel. The data channel transfers 16/20/24 bit PCM samples. Thus, PCM
substream has a constrain about it.
This commit moves codes related to the constraint from packet streaming
layer to AM824 data block processing layer.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/amdtp-am824.h b/sound/firewire/amdtp-am824.h
index cfc0d61..4aaed90 100644
--- a/sound/firewire/amdtp-am824.h
+++ b/sound/firewire/amdtp-am824.h
@@ -1,6 +1,8 @@
#ifndef SOUND_FIREWIRE_AMDTP_AM824_H_INCLUDED
#define SOUND_FIREWIRE_AMDTP_AM824_H_INCLUDED
+#include <sound/pcm.h>
+
#include "amdtp-stream.h"
int amdtp_am824_set_parameters(struct amdtp_stream *s, unsigned int rate,
@@ -8,6 +10,9 @@
unsigned int midi_ports,
bool double_pcm_frames);
+int amdtp_am824_add_pcm_hw_constraints(struct amdtp_stream *s,
+ struct snd_pcm_runtime *runtime);
+
int amdtp_am824_init(struct amdtp_stream *s, struct fw_unit *unit,
enum amdtp_stream_direction dir, enum cip_flags flags);
#endif