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- Wednesday, July 18th, 2007 at 2:52:06am MDT
- SWCODEC:
- 1) Load compressed audio data from file
- 2) Decode to PCM
- 3) Apply DSP processing
- 4) Send PCM data to DAC via DMA (or FIQ)
- [Not currently implemented] Between tracks, check for audio format
- change (i.e.. samplerate) and configure DAC
- HWCODEC (when PCM playback is implemented):
- 1) Load compressed audio data from file
- 2) Prepare data for sending to MAS - (bitswap for MPEG, bitswap and
- maybe byteswap (depending on WAV/AIFF) WAV/AIFF, maybe decode
- simple compressed formats to bitswapped PCM)
- 3) Send data to MAS via DMA
- Between tracks, may need to swap between MPEG and PCM codecs.
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