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ALSA: firewire-lib: split allocation of isochronous resources from establishment of connection

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In current implementation, establishment connection corresponds to
allocation of isochronous resources. Although this is an ideal
implementation of CMP described in IEC 61883-1, it's not enough
efficient to recover PCM substream multiplexed in packet streaming.
The packet streaming can always restart on the same allocated
isochronous resources even if the previous packet streaming
corrupted.

This commit splits allocation of isochronous resources from
establishment of connection so that CMP runs with allocated
isochronous resources.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto
2019-06-15 18:11:01 +09:00
committed by Takashi Iwai
parent c6b84ffbd5
commit 7bc93821a7
5 changed files with 100 additions and 51 deletions
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7
sound/firewire/cmp.h
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@@ -42,8 +42,11 @@ int cmp_connection_init(struct cmp_connection *connection,
int cmp_connection_check_used(struct cmp_connection *connection, bool *used);
void cmp_connection_destroy(struct cmp_connection *connection);
int cmp_connection_establish(struct cmp_connection *connection,
unsigned int max_payload);
int cmp_connection_reserve(struct cmp_connection *connection,
unsigned int max_payload);
void cmp_connection_release(struct cmp_connection *connection);
int cmp_connection_establish(struct cmp_connection *connection);
int cmp_connection_update(struct cmp_connection *connection);
void cmp_connection_break(struct cmp_connection *connection);