Hi! I am trying to improve the korg1212 driver and I am finding a difficult situation. Let me explain... The korg1212 card has a fixed size audio frame containing two different sample size, 16 bits and 32 bits, that are filled by the card at same time. Ten channels of this frame have 16 bits (ADAT + analog channels), two others have 20 bits (SPDIF) and 32 bits of ADAT Time-code information. I am trying to establish three different devices to support these different sample size and interface type (ADAT, analog and SPDIF). To do this, I will have a frame size greater than the number of samples times its size.
It could be solved creating temporary buffers that would carry some waste of performance or; modifying the card firmware, putting each channel on a separated buffer. I am denying the first option for a while. The second one depends on Korg... I do not have the firmware source code. I've tried to set SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_PERIOD_SIZE and SNDRV_PCM_HW_PARAM_BUFFER_SIZE constraint but I get an error when I call snd_pcm_hw_params_any on application side. How can I handle this situation? How set SNDRV_PCM_HW_PARAM_FRAME_BITS and all other constraints? How can I have an audio frame larger than the total size of all samples in it? Haroldo ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
