At Thu, 27 May 2004 20:17:17 +0100, James Courtier-Dutton wrote:
Here is my first go at Audigy LS support. It can play sound to the front speakers.
great!
/* hardware definition */
static snd_pcm_hardware_t snd_audigyls_playback_hw = {
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = (32*1024),
.period_bytes_min = 64,
.period_bytes_max = (16*1024),
.periods_min = 2,
.periods_max = 16,
^^ are you sure this is ok? in the case of emu10k1, it generates irq twice per buffer (HALF and BUFFER). then periods_max must be 2.
With periods_max set to 2, sound plays, but has artifacts. With periods > 2, the sound is smooth, without any clicks etc.
anyway, the driver code is quite similar with emu10k1x.c. i checked the diff between them and the amount of difference is really small. how about merging them? then we can understand / maintain the codes better.
Takashi
I would like to keep the two drivers separate for a bit. That way I can keep changing stuff without caring if the emu10k1x.c stays working.
Once I get all the features working, we could then look at merging the two.
There is still a lot to go.
1) 24bit 192khz sound out.
2) 5.1 sound.
3) Digital SPDIF output.
4) Capture.
5) MIDI.
It seems that the changing of the sample rate etc. from the default is done via some sort of UART.
Also, I can change how often the interrupts happen, so I will need to implement that.
Cheers James
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