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ALSA: firewire-tascam: code refactoring for TASCAM data block processing layer

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This is code refactoring for TASCAM 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 12:37:06 +09:00 • committed by Takashi Iwai
parent bb47396677
commit 806653b70e
1 changed files with 32 additions and 23 deletions
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55
sound/firewire/tascam/amdtp-tascam.c
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@ -32,19 +32,24 @@ int amdtp_tscm_set_parameters(struct amdtp_stream *s, unsigned int rate)
return amdtp_stream_set_parameters(s, rate, data_channels);
}
static void write_pcm_s32(struct amdtp_stream *s,
struct snd_pcm_substream *pcm,
__be32 *buffer, unsigned int frames)
static void write_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
__be32 *buffer, unsigned int frames,
unsigned int pcm_frames)
{
struct amdtp_tscm *p = s->protocol;
unsigned int channels = p->pcm_channels;
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
unsigned int pcm_buffer_pointer;
int remaining_frames;
const u32 *src;
int i, c;
pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
pcm_buffer_pointer %= runtime->buffer_size;
channels = p->pcm_channels;
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 < frames; ++i) {
for (c = 0; c < channels; ++c) {
@ -57,19 +62,24 @@ static void write_pcm_s32(struct amdtp_stream *s,
}
}
static void read_pcm_s32(struct amdtp_stream *s,
struct snd_pcm_substream *pcm,
__be32 *buffer, unsigned int frames)
static void read_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
__be32 *buffer, unsigned int frames,
unsigned int pcm_frames)
{
struct amdtp_tscm *p = s->protocol;
unsigned int channels = p->pcm_channels;
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
unsigned int pcm_buffer_pointer;
int remaining_frames;
u32 *dst;
int i, c;
pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
pcm_buffer_pointer %= runtime->buffer_size;
channels = p->pcm_channels;
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;
/* The first data channel is for event counter. */
buffer += 1;
@ -169,13 +179,12 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
const struct pkt_desc *desc,
struct snd_pcm_substream *pcm)
{
unsigned int pcm_frames;
unsigned int pcm_frames = 0;
if (pcm) {
read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
pcm_frames = desc->data_blocks;
} else {
pcm_frames = 0;
read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
pcm_frames);
pcm_frames += desc->data_blocks;
}
read_status_messages(s, desc->ctx_payload, desc->data_blocks);
@ -187,14 +196,14 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
const struct pkt_desc *desc,
struct snd_pcm_substream *pcm)
{
unsigned int pcm_frames;
unsigned int pcm_frames = 0;
if (pcm) {
write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
pcm_frames = 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;
}
return pcm_frames;