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ALSA: firewire-lib: unify packet handler for IT context

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The handlers for packet with CIP and without CIP include common codes.
This commit unifies them and remove an member for pointer to callback
function from data structure.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-05-24 00:14:38 +09:00 committed by Takashi Iwai
parent 252219c7b3
commit 16be458993
2 changed files with 18 additions and 44 deletions
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59
sound/firewire/amdtp-stream.c
View File

@ -496,26 +496,38 @@ static int handle_out_packet(struct amdtp_stream *s, unsigned int cycle,
{
unsigned int syt;
unsigned int data_blocks;
unsigned int pcm_frames;
unsigned int payload_length;
__be32 *cip_header;
unsigned int pcm_frames;
struct snd_pcm_substream *pcm;
syt = calculate_syt(s, cycle);
data_blocks = calculate_data_blocks(s, syt);
pcm_frames = s->process_data_blocks(s, buffer + 2, data_blocks, &syt);
payload_length = data_blocks * sizeof(__be32) * s->data_block_quadlets;
if (!(s->flags & CIP_NO_HEADER)) {
cip_header = buffer;
buffer += 2;
payload_length += 2 * sizeof(__be32);
} else {
cip_header = NULL;
}
pcm_frames = s->process_data_blocks(s, buffer, data_blocks, &syt);
if (s->flags & CIP_DBC_IS_END_EVENT)
s->data_block_counter =
(s->data_block_counter + data_blocks) & 0xff;
generate_cip_header(s, buffer, syt);
if (cip_header)
generate_cip_header(s, cip_header, syt);
if (!(s->flags & CIP_DBC_IS_END_EVENT))
s->data_block_counter =
(s->data_block_counter + data_blocks) & 0xff;
payload_length = 8 + data_blocks * 4 * s->data_block_quadlets;
trace_amdtp_packet(s, cycle, buffer, payload_length, data_blocks, index);
trace_amdtp_packet(s, cycle, cip_header, payload_length, data_blocks,
index);
if (queue_out_packet(s, payload_length) < 0)
return -EIO;
@ -524,37 +536,6 @@ static int handle_out_packet(struct amdtp_stream *s, unsigned int cycle,
if (pcm && pcm_frames > 0)
update_pcm_pointers(s, pcm, pcm_frames);
/* No need to return the number of handled data blocks. */
return 0;
}
static int handle_out_packet_without_header(struct amdtp_stream *s,
unsigned int cycle, const __be32 *ctx_header,
__be32 *buffer, unsigned int index)
{
unsigned int syt;
unsigned int data_blocks;
unsigned int pcm_frames;
unsigned int payload_length;
struct snd_pcm_substream *pcm;
syt = calculate_syt(s, cycle);
data_blocks = calculate_data_blocks(s, syt);
pcm_frames = s->process_data_blocks(s, buffer, data_blocks, &syt);
s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff;
payload_length = data_blocks * 4 * s->data_block_quadlets;
trace_amdtp_packet(s, cycle, NULL, payload_length, data_blocks, index);
if (queue_out_packet(s, payload_length) < 0)
return -EIO;
pcm = READ_ONCE(s->pcm);
if (pcm && pcm_frames > 0)
update_pcm_pointers(s, pcm, pcm_frames);
/* No need to return the number of handled data blocks. */
return 0;
}
@ -766,7 +747,7 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
cycle = compute_it_cycle(*ctx_header);
buffer = s->buffer.packets[s->packet_index].buffer;
if (s->handle_packet(s, cycle, ctx_header, buffer, i) < 0) {
if (handle_out_packet(s, cycle, ctx_header, buffer, i) < 0) {
cancel_stream(s);
return;
}
@ -837,10 +818,6 @@ static void amdtp_stream_first_callback(struct fw_iso_context *context,
cycle = compute_it_cycle(*ctx_header);
context->callback.sc = out_stream_callback;
if (s->flags & CIP_NO_HEADER)
s->handle_packet = handle_out_packet_without_header;
else
s->handle_packet = handle_out_packet;
}
s->start_cycle = cycle;

3
sound/firewire/amdtp-stream.h
View File

@ -108,9 +108,6 @@ struct amdtp_stream {
struct iso_packets_buffer buffer;
int packet_index;
int tag;
int (*handle_packet)(struct amdtp_stream *s, unsigned int cycle,
const __be32 *ctx_header, __be32 *buffer,
unsigned int index);
union {
struct {
unsigned int ctx_header_size;