This is code refactoring for AM824 data block processing layer so that
it can receive list of packet descriptor.
Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
sound/firewire/amdtp-am824.c | 51 +++++++++++++++++++++---------------
1 file changed, 30 insertions(+), 21 deletions(-)
diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index ff089ffa3374..5d2952a1a9b2 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -146,19 +146,24 @@ void amdtp_am824_set_midi_position(struct amdtp_stream *s,
}
EXPORT_SYMBOL_GPL(amdtp_am824_set_midi_position);
-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_am824 *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) {
@@ -172,19 +177,24 @@ 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_am824 *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;
for (i = 0; i < frames; ++i) {
for (c = 0; c < channels; ++c) {
@@ -340,14 +350,14 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
struct snd_pcm_substream *pcm)
{
struct amdtp_am824 *p = s->protocol;
- unsigned int pcm_frames;
+ unsigned int pcm_frames = 0;
if (pcm) {
- write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+ write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
+ pcm_frames);
pcm_frames = desc->data_blocks * p->frame_multiplier;
} else {
write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
- pcm_frames = 0;
}
if (p->midi_ports) {
@@ -363,13 +373,12 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
struct snd_pcm_substream *pcm)
{
struct amdtp_am824 *p = s->protocol;
- unsigned int pcm_frames;
+ unsigned int pcm_frames = 0;
if (pcm) {
- read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+ read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
+ pcm_frames);
pcm_frames = desc->data_blocks * p->frame_multiplier;
- } else {
- pcm_frames = 0;
}
if (p->midi_ports) {
--
2.20.1
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