[Bug 14717] resampled sound is horrible

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=14717

--- Comment #141 from Raymond <superquad.vortex2 at gmail.com> 2011-02-20 02:49:21 CST ---
(In reply to comment #134)
> We are not talking about adding a resampler to dsound, because a resampler
> already exists there in Wine code base. We are talking about replacing it with
> a resampler that provides the same quality as Windows resampler (at least for
> SB 128 PCI) for the case of mismatching primary and secondary buffer sample
> rates.

Take a look at the ENS1371 Specification

if oss emulation work better than alsa

It look like ens1371 driver need to specify 

snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);

so that dsound are forced to select a period bytes which is multiple of 32
bytes since Eight Long words will always be transferred during Audio Write
Transfers.


5.2.      Audio Write Transfers
The CCB will first write up to 8 long words into the intermediate PCI buffer.
The CCB will then request a write transfer from the PCIB to main memory and
specify the starting address of the transfer. The PCIB arbitrates for the PCI
bus and transfers 8 Long Words into system memory. Eight Long words will always
be transferred during this operation.



4.11. Internal Memory


The internal memory for the sound cache in AudioPCI 97 is organized as 4 blocks
of 64 bytes each. Each block is divided into 4 pages of 16 bytes each (4
longwords). Memory can be accessed as longwords only.


The internal memory organization for the Sample Rate Converter in AudioPCI 97
is shown below. The memory is accessed through the Sample Rate Converter
interface register located at address 10H.

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