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ALSA: firewire-motu: code refactoring for MOTU data block processing layer 

This is code refactoring for MOTU data block processing layer so that
it can receive list of packet descriptor.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-07-22 12:37:07 +09:00 committed by Takashi Iwai
parent 806653b70e
commit 00d004db64
1 changed files with 33 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
sound/firewire/motu/amdtp-motu.c
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@ -117,19 +117,25 @@ int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
return 0;
}
static void read_pcm_s32(struct amdtp_stream *s,
struct snd_pcm_runtime *runtime,
__be32 *buffer, unsigned int data_blocks)
static void read_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
__be32 *buffer, unsigned int data_blocks,
unsigned int pcm_frames)
{
struct amdtp_motu *p = s->protocol;
unsigned int channels, remaining_frames, i, c;
unsigned int channels = p->pcm_chunks;
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int pcm_buffer_pointer;
int remaining_frames;
u8 *byte;
u32 *dst;
int i, c;
pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
pcm_buffer_pointer %= runtime->buffer_size;
channels = p->pcm_chunks;
dst = (void *)runtime->dma_area +
frames_to_bytes(runtime, s->pcm_buffer_pointer);
remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
frames_to_bytes(runtime, pcm_buffer_pointer);
remaining_frames = runtime->buffer_size - pcm_buffer_pointer;
for (i = 0; i < data_blocks; ++i) {
byte = (u8 *)buffer + p->pcm_byte_offset;
@ -147,19 +153,25 @@ static void read_pcm_s32(struct amdtp_stream *s,
}
}
static void write_pcm_s32(struct amdtp_stream *s,
struct snd_pcm_runtime *runtime,
__be32 *buffer, unsigned int data_blocks)
static void write_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
__be32 *buffer, unsigned int data_blocks,
unsigned int pcm_frames)
{
struct amdtp_motu *p = s->protocol;
unsigned int channels, remaining_frames, i, c;
unsigned int channels = p->pcm_chunks;
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int pcm_buffer_pointer;
int remaining_frames;
u8 *byte;
const u32 *src;
int i, c;
pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
pcm_buffer_pointer %= runtime->buffer_size;
channels = p->pcm_chunks;
src = (void *)runtime->dma_area +
frames_to_bytes(runtime, s->pcm_buffer_pointer);
remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
frames_to_bytes(runtime, pcm_buffer_pointer);
remaining_frames = runtime->buffer_size - pcm_buffer_pointer;
for (i = 0; i < data_blocks; ++i) {
byte = (u8 *)buffer + p->pcm_byte_offset;
@ -303,7 +315,7 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
struct snd_pcm_substream *pcm)
{
struct amdtp_motu *p = s->protocol;
unsigned int pcm_frames;
unsigned int pcm_frames = 0;
trace_data_block_sph(s, desc->data_blocks, desc->ctx_payload);
trace_data_block_message(s, desc->data_blocks, desc->ctx_payload);
@ -312,11 +324,9 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
read_midi_messages(s, desc->ctx_payload, desc->data_blocks);
if (pcm) {
read_pcm_s32(s, pcm->runtime, desc->ctx_payload,
desc->data_blocks);
read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
pcm_frames);
pcm_frames = desc->data_blocks;
} else {
pcm_frames = 0;
}
return pcm_frames;
@ -368,8 +378,8 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
const struct pkt_desc *desc,
struct snd_pcm_substream *pcm)
{
struct amdtp_motu *p = (struct amdtp_motu *)s->protocol;
unsigned int pcm_frames;
struct amdtp_motu *p = s->protocol;
unsigned int pcm_frames = 0;
/* TODO: how to interact control messages between userspace? */
@ -377,12 +387,11 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
write_midi_messages(s, desc->ctx_payload, desc->data_blocks);
if (pcm) {
write_pcm_s32(s, pcm->runtime, desc->ctx_payload,
desc->data_blocks);
write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
pcm_frames);
pcm_frames = desc->data_blocks;
} else {
write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
pcm_frames = 0;
}
write_sph(s, desc->ctx_payload, desc->data_blocks);