static void
snd_pcm_indirect2_capture_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect2 *rec,
snd_pcm_indirect2_copy_t copy,
snd_pcm_indirect2_zero_t null)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
if (diff) {
#ifdef SND_PCM_INDIRECT2_STAT
rec->lastdifftime = jiffies;
#endif
if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
diff += runtime->boundary;
rec->sw_ready -= frames_to_bytes(runtime, diff);
rec->appl_ptr = appl_ptr;
}
if (rec->hw_ready && (rec->sw_ready >= (int)rec->sw_buffer_size)) {
unsigned int bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstzerotime == 0) {
rec->firstzerotime = jiffies;
snd_printk(KERN_DEBUG "STAT: (capture) "
"@firstzerotime: mul_elapsed: %d, "
"min_period_count: %d\n",
rec->mul_elapsed, rec->min_period_count);
snd_printk(KERN_DEBUG "STAT: (capture) "
"@firstzerotime: sw_io: %d, sw_data: %d, "
"appl_ptr: %u\n",
rec->sw_io, rec->sw_data,
(unsigned int)appl_ptr);
}
if ((jiffies - rec->firstzerotime) < 3750) {
rec->zero_times[(jiffies - rec->firstzerotime)]++;
rec->zero_times_saved++;
} else
rec->zero_times_notsaved++;
#endif
bytes = null(substream, rec);
#ifdef SND_PCM_INDIRECT2_STAT
rec->zeros2hw += bytes;
if (bytes < 64)
rec->zero_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: (capture) %d zero Bytes copied to "
"hardware at once - too big to save!\n",
bytes);
#endif
snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 0,
bytes);
rec->sw_io = SNDRV_PCM_POS_XRUN;
return;
}
while (rec->hw_ready && (rec->sw_ready < (int)rec->sw_buffer_size)) {
size_t sw_to_end = rec->sw_buffer_size - rec->sw_data;
size_t bytes = rec->sw_buffer_size - rec->sw_ready;
if (sw_to_end < bytes)
bytes = sw_to_end;
if (!bytes)
break;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstbytetime == 0)
rec->firstbytetime = jiffies;
rec->lastbytetime = jiffies;
#endif
bytes = copy(substream, rec, bytes);
rec->bytes2hw += bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (bytes < 64)
rec->byte_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: (capture) %d Bytes copied to "
"hardware at once - too big to save!\n",
bytes);
#endif
rec->sw_data += bytes;
if (rec->sw_data == rec->sw_buffer_size)
rec->sw_data = 0;
snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 1,
bytes);
rec->sw_ready += bytes;
}
return;
}
/*
* _internal_ helper function for capture interrupt callback
*/
static void
snd_pcm_indirect2_capture_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect2 *rec,
snd_pcm_indirect2_copy_t copy,
snd_pcm_indirect2_zero_t null)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
if (diff) {
#ifdef SND_PCM_INDIRECT2_STAT
rec->lastdifftime = jiffies;
#endif
if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
diff += runtime->boundary;
rec->sw_ready -= frames_to_bytes(runtime, diff);
rec->appl_ptr = appl_ptr;
}
/* if hardware has something, but the intermediate buffer is full
* => skip contents of buffer
*/
if (rec->hw_ready && (rec->sw_ready >= (int)rec->sw_buffer_size)) {
unsigned int bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstzerotime == 0) {
rec->firstzerotime = jiffies;
snd_printk(KERN_DEBUG "STAT: (capture) "
"@firstzerotime: mul_elapsed: %d, "
"min_period_count: %d\n",
rec->mul_elapsed, rec->min_period_count);
snd_printk(KERN_DEBUG "STAT: (capture) "
"@firstzerotime: sw_io: %d, sw_data: %d, "
"appl_ptr: %u\n",
rec->sw_io, rec->sw_data,
(unsigned int)appl_ptr);
}
if ((jiffies - rec->firstzerotime) < 3750) {
rec->zero_times[(jiffies - rec->firstzerotime)]++;
rec->zero_times_saved++;
} else
rec->zero_times_notsaved++;
#endif
bytes = null(substream, rec);
#ifdef SND_PCM_INDIRECT2_STAT
rec->zeros2hw += bytes;
if (bytes < 64)
rec->zero_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: (capture) %d zero Bytes copied to "
"hardware at once - too big to save!\n",
bytes);
#endif
snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 0,
bytes);
/* report an overrun */
rec->sw_io = SNDRV_PCM_POS_XRUN;
return;
}
while (rec->hw_ready && (rec->sw_ready < (int)rec->sw_buffer_size)) {
/* sw_to_end: max. number of bytes that we can write to the
* intermediate buffer (until it's end)
*/
size_t sw_to_end = rec->sw_buffer_size - rec->sw_data;
/* bytes: max. number of bytes, which may be copied to the
* intermediate buffer without overflow (in _one_ step)
*/
size_t bytes = rec->sw_buffer_size - rec->sw_ready;
/* limit number of bytes (for transfer) by available room in
* the intermediate buffer
*/
if (sw_to_end < bytes)
bytes = sw_to_end;
if (!bytes)
break;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstbytetime == 0)
rec->firstbytetime = jiffies;
rec->lastbytetime = jiffies;
#endif
/* copy bytes from the intermediate buffer (position sw_data)
* to the HW at most and return number of bytes actually copied
* from HW
* Furthermore, set hw_ready to 0, if the fifo is empty now.
*/
bytes = copy(substream, rec, bytes);
rec->bytes2hw += bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (bytes < 64)
rec->byte_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: (capture) %d Bytes copied to "
"hardware at once - too big to save!\n",
bytes);
#endif
/* increase sw_data by the number of actually copied bytes from
* HW
*/
rec->sw_data += bytes;
if (rec->sw_data == rec->sw_buffer_size)
rec->sw_data = 0;
snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 1,
bytes);
/* number of bytes in the intermediate buffer, which haven't
* been fetched by ALSA yet.
*/
rec->sw_ready += bytes;
}
return;
}
static void
snd_pcm_indirect2_playback_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect2 *rec,
snd_pcm_indirect2_copy_t copy,
snd_pcm_indirect2_zero_t zero)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
if (diff) {
#ifdef SND_PCM_INDIRECT2_STAT
rec->lastdifftime = jiffies;
#endif
if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
diff += runtime->boundary;
rec->sw_ready += (int)frames_to_bytes(runtime, diff);
rec->appl_ptr = appl_ptr;
}
if (rec->hw_ready && (rec->sw_ready <= 0)) {
unsigned int bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstzerotime == 0) {
rec->firstzerotime = jiffies;
snd_printk(KERN_DEBUG
"STAT: @firstzerotime: mul_elapsed: %d, "
"min_period_count: %d\n",
rec->mul_elapsed, rec->min_period_count);
snd_printk(KERN_DEBUG
"STAT: @firstzerotime: sw_io: %d, "
"sw_data: %d, appl_ptr: %u\n",
rec->sw_io, rec->sw_data,
(unsigned int)appl_ptr);
}
if ((jiffies - rec->firstzerotime) < 3750) {
rec->zero_times[(jiffies - rec->firstzerotime)]++;
rec->zero_times_saved++;
} else
rec->zero_times_notsaved++;
#endif
bytes = zero(substream, rec);
#ifdef SND_PCM_INDIRECT2_STAT
rec->zeros2hw += bytes;
if (bytes < 64)
rec->zero_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: %d zero Bytes copied to hardware at "
"once - too big to save!\n",
bytes);
#endif
snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 0,
bytes);
return;
}
while (rec->hw_ready && (rec->sw_ready > 0)) {
unsigned int sw_to_end = rec->sw_buffer_size - rec->sw_data;
unsigned int bytes = rec->sw_ready;
if (sw_to_end < bytes)
bytes = sw_to_end;
if (!bytes)
break;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstbytetime == 0)
rec->firstbytetime = jiffies;
rec->lastbytetime = jiffies;
#endif
/* copy bytes from intermediate buffer position sw_data to the
* HW and return number of bytes actually written
* Furthermore, set hw_ready to 0, if the fifo isn't empty
* now => more could be transferred to fifo
*/
bytes = copy(substream, rec, bytes);
rec->bytes2hw += bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (bytes < 64)
rec->byte_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: %d Bytes copied to hardware at once "
"- too big to save!\n",
bytes);
#endif
/* increase sw_data by the number of actually written bytes
* (= number of taken bytes from intermediate buffer)
*/
rec->sw_data += bytes;
if (rec->sw_data == rec->sw_buffer_size)
rec->sw_data = 0;
snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 1,
bytes);
rec->sw_ready -= bytes;
}
return;
}
/*
* _internal_ helper function for playback interrupt callback
*/
static void
snd_pcm_indirect2_playback_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect2 *rec,
snd_pcm_indirect2_copy_t copy,
snd_pcm_indirect2_zero_t zero)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
/* runtime->control->appl_ptr: position where ALSA will write next time
* rec->appl_ptr: position where ALSA was last time
* diff: obviously ALSA wrote that much bytes into the intermediate
* buffer since we checked last time
*/
snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
if (diff) {
#ifdef SND_PCM_INDIRECT2_STAT
rec->lastdifftime = jiffies;
#endif
if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
diff += runtime->boundary;
/* number of bytes "added" by ALSA increases the number of
<<<<<<< HEAD
* bytes which are ready to "be transferred to HW"/"played"
=======
* bytes which are ready to "be transfered to HW"/"played"
>>>>>>> 296c66da8a02d52243f45b80521febece5ed498a
* Then, set rec->appl_ptr to not count bytes twice next time.
*/
rec->sw_ready += (int)frames_to_bytes(runtime, diff);
rec->appl_ptr = appl_ptr;
}
if (rec->hw_ready && (rec->sw_ready <= 0)) {
unsigned int bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstzerotime == 0) {
rec->firstzerotime = jiffies;
snd_printk(KERN_DEBUG
"STAT: @firstzerotime: mul_elapsed: %d, "
"min_period_count: %d\n",
rec->mul_elapsed, rec->min_period_count);
snd_printk(KERN_DEBUG
"STAT: @firstzerotime: sw_io: %d, "
"sw_data: %d, appl_ptr: %u\n",
rec->sw_io, rec->sw_data,
(unsigned int)appl_ptr);
}
if ((jiffies - rec->firstzerotime) < 3750) {
rec->zero_times[(jiffies - rec->firstzerotime)]++;
rec->zero_times_saved++;
} else
rec->zero_times_notsaved++;
#endif
bytes = zero(substream, rec);
#ifdef SND_PCM_INDIRECT2_STAT
rec->zeros2hw += bytes;
if (bytes < 64)
rec->zero_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: %d zero Bytes copied to hardware at "
"once - too big to save!\n",
bytes);
#endif
snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 0,
bytes);
return;
}
while (rec->hw_ready && (rec->sw_ready > 0)) {
/* sw_to_end: max. number of bytes that can be read/take from
* the current position (sw_data) in _one_ step
*/
unsigned int sw_to_end = rec->sw_buffer_size - rec->sw_data;
/* bytes: number of bytes we have available (for reading) */
unsigned int bytes = rec->sw_ready;
if (sw_to_end < bytes)
bytes = sw_to_end;
if (!bytes)
break;
#ifdef SND_PCM_INDIRECT2_STAT
if (rec->firstbytetime == 0)
rec->firstbytetime = jiffies;
rec->lastbytetime = jiffies;
#endif
/* copy bytes from intermediate buffer position sw_data to the
* HW and return number of bytes actually written
* Furthermore, set hw_ready to 0, if the fifo isn't empty
<<<<<<< HEAD
* now => more could be transferred to fifo
=======
* now => more could be transfered to fifo
>>>>>>> 296c66da8a02d52243f45b80521febece5ed498a
*/
bytes = copy(substream, rec, bytes);
rec->bytes2hw += bytes;
#ifdef SND_PCM_INDIRECT2_STAT
if (bytes < 64)
rec->byte_sizes[bytes]++;
else
snd_printk(KERN_DEBUG
"STAT: %d Bytes copied to hardware at once "
"- too big to save!\n",
bytes);
#endif
/* increase sw_data by the number of actually written bytes
* (= number of taken bytes from intermediate buffer)
*/
rec->sw_data += bytes;
if (rec->sw_data == rec->sw_buffer_size)
rec->sw_data = 0;
/* now sw_data is the position where ALSA is going to write
* in the intermediate buffer next time = position we are going
* to read from next time
*/
snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 1,
bytes);
/* we read bytes from intermediate buffer, so we need to say
* that the number of bytes ready for transfer are decreased
* now
*/
rec->sw_ready -= bytes;
}
return;
}
