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Diffstat (limited to 'sound/usb/caiaq/audio.c')
-rw-r--r--sound/usb/caiaq/audio.c175
1 files changed, 160 insertions, 15 deletions
diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index 4328cad6c3a2..68b97477577b 100644
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -111,7 +111,7 @@ static int stream_start(struct snd_usb_caiaqdev *dev)
memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
dev->input_panic = 0;
dev->output_panic = 0;
- dev->first_packet = 1;
+ dev->first_packet = 4;
dev->streaming = 1;
dev->warned = 0;
@@ -169,7 +169,7 @@ static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
}
static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
- struct snd_pcm_hw_params *hw_params)
+ struct snd_pcm_hw_params *hw_params)
{
debug("%s(%p)\n", __func__, sub);
return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
@@ -189,7 +189,7 @@ static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
#endif
static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
- 48000, 64000, 88200, 96000, 176400, 192000 };
+ 48000, 64000, 88200, 96000, 176400, 192000 };
static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
{
@@ -201,12 +201,39 @@ static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
debug("%s(%p)\n", __func__, substream);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- dev->period_out_count[index] = BYTES_PER_SAMPLE + 1;
- dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
+ int out_pos;
+
+ switch (dev->spec.data_alignment) {
+ case 0:
+ case 2:
+ out_pos = BYTES_PER_SAMPLE + 1;
+ break;
+ case 3:
+ default:
+ out_pos = 0;
+ break;
+ }
+
+ dev->period_out_count[index] = out_pos;
+ dev->audio_out_buf_pos[index] = out_pos;
} else {
- int in_pos = (dev->spec.data_alignment == 2) ? 0 : 2;
- dev->period_in_count[index] = BYTES_PER_SAMPLE + in_pos;
- dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE + in_pos;
+ int in_pos;
+
+ switch (dev->spec.data_alignment) {
+ case 0:
+ in_pos = BYTES_PER_SAMPLE + 2;
+ break;
+ case 2:
+ in_pos = BYTES_PER_SAMPLE;
+ break;
+ case 3:
+ default:
+ in_pos = 0;
+ break;
+ }
+
+ dev->period_in_count[index] = in_pos;
+ dev->audio_in_buf_pos[index] = in_pos;
}
if (dev->streaming)
@@ -221,7 +248,7 @@ static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
snd_pcm_limit_hw_rates(runtime);
bytes_per_sample = BYTES_PER_SAMPLE;
- if (dev->spec.data_alignment == 2)
+ if (dev->spec.data_alignment >= 2)
bytes_per_sample++;
bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
@@ -253,6 +280,8 @@ static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
{
struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
+ debug("%s(%p) cmd %d\n", __func__, sub, cmd);
+
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
@@ -402,6 +431,61 @@ static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
}
}
+static void read_in_urb_mode3(struct snd_usb_caiaqdev *dev,
+ const struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ int stream, i;
+
+ /* paranoia check */
+ if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
+ return;
+
+ for (i = 0; i < iso->actual_length;) {
+ for (stream = 0; stream < dev->n_streams; stream++) {
+ struct snd_pcm_substream *sub = dev->sub_capture[stream];
+ char *audio_buf = NULL;
+ int c, n, sz = 0;
+
+ if (sub && !dev->input_panic) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ audio_buf = rt->dma_area;
+ sz = frames_to_bytes(rt, rt->buffer_size);
+ }
+
+ for (c = 0; c < CHANNELS_PER_STREAM; c++) {
+ /* 3 audio data bytes, followed by 1 check byte */
+ if (audio_buf) {
+ for (n = 0; n < BYTES_PER_SAMPLE; n++) {
+ audio_buf[dev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
+
+ if (dev->audio_in_buf_pos[stream] == sz)
+ dev->audio_in_buf_pos[stream] = 0;
+ }
+
+ dev->period_in_count[stream] += BYTES_PER_SAMPLE;
+ }
+
+ i += BYTES_PER_SAMPLE;
+
+ if (usb_buf[i] != ((stream << 1) | c) &&
+ !dev->first_packet) {
+ if (!dev->input_panic)
+ printk(" EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
+ ((stream << 1) | c), usb_buf[i], c, stream, i);
+ dev->input_panic = 1;
+ }
+
+ i++;
+ }
+ }
+ }
+
+ if (dev->first_packet > 0)
+ dev->first_packet--;
+}
+
static void read_in_urb(struct snd_usb_caiaqdev *dev,
const struct urb *urb,
const struct usb_iso_packet_descriptor *iso)
@@ -419,6 +503,9 @@ static void read_in_urb(struct snd_usb_caiaqdev *dev,
case 2:
read_in_urb_mode2(dev, urb, iso);
break;
+ case 3:
+ read_in_urb_mode3(dev, urb, iso);
+ break;
}
if ((dev->input_panic || dev->output_panic) && !dev->warned) {
@@ -429,9 +516,9 @@ static void read_in_urb(struct snd_usb_caiaqdev *dev,
}
}
-static void fill_out_urb(struct snd_usb_caiaqdev *dev,
- struct urb *urb,
- const struct usb_iso_packet_descriptor *iso)
+static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *dev,
+ struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
{
unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
struct snd_pcm_substream *sub;
@@ -457,9 +544,67 @@ static void fill_out_urb(struct snd_usb_caiaqdev *dev,
/* fill in the check bytes */
if (dev->spec.data_alignment == 2 &&
i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
- (dev->n_streams * CHANNELS_PER_STREAM))
- for (stream = 0; stream < dev->n_streams; stream++, i++)
- usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
+ (dev->n_streams * CHANNELS_PER_STREAM))
+ for (stream = 0; stream < dev->n_streams; stream++, i++)
+ usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
+ }
+}
+
+static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *dev,
+ struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ int stream, i;
+
+ for (i = 0; i < iso->length;) {
+ for (stream = 0; stream < dev->n_streams; stream++) {
+ struct snd_pcm_substream *sub = dev->sub_playback[stream];
+ char *audio_buf = NULL;
+ int c, n, sz = 0;
+
+ if (sub) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ audio_buf = rt->dma_area;
+ sz = frames_to_bytes(rt, rt->buffer_size);
+ }
+
+ for (c = 0; c < CHANNELS_PER_STREAM; c++) {
+ for (n = 0; n < BYTES_PER_SAMPLE; n++) {
+ if (audio_buf) {
+ usb_buf[i+n] = audio_buf[dev->audio_out_buf_pos[stream]++];
+
+ if (dev->audio_out_buf_pos[stream] == sz)
+ dev->audio_out_buf_pos[stream] = 0;
+ } else {
+ usb_buf[i+n] = 0;
+ }
+ }
+
+ if (audio_buf)
+ dev->period_out_count[stream] += BYTES_PER_SAMPLE;
+
+ i += BYTES_PER_SAMPLE;
+
+ /* fill in the check byte pattern */
+ usb_buf[i++] = (stream << 1) | c;
+ }
+ }
+ }
+}
+
+static inline void fill_out_urb(struct snd_usb_caiaqdev *dev,
+ struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ switch (dev->spec.data_alignment) {
+ case 0:
+ case 2:
+ fill_out_urb_mode_0(dev, urb, iso);
+ break;
+ case 3:
+ fill_out_urb_mode_3(dev, urb, iso);
+ break;
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.