Difference: RockboxMemoryLayout (r14 vs. r13)

Rockbox Memory Layout

Usage	Start pointer	Size
font buffer	mbuf	MAX_FONT_SIZE
dircache	audiobuf (initially)	varies
DataBase		varies
DataBase search instructions		varies
playlist storage		configurable
tree storage		configurable
LastFMLog cache	scrobbler_cache	SCROBBLER_MAX_CACHE * SCROBBLER_CACHE_LEN (optional)
Cuesheet buffer		2 * sizeof(struct cuesheet) (optional)
voice thumbnail buffer (.talk clips)		MAX_THUMBNAIL_BUFSIZE
voice file	audiobuf (after initialisation complete)	talk_get_bufsize()
codec malloc buffer	&audiobuf[talk_get_bufsize()]	MALLOC_BUFSIZE
compressed codec data (+ guard buffer)	filebuf = &audiobuf[talk_get_bufsize()+MALLOC_BUFSIZE]	as big as possible
audio codec IRAM	filebuf + filebuflen	CODEC_IRAM_SIZE
voice codec IRAM		CODEC_IRAM_SIZE (if talk_voice_required())
voice audio codec DRAM		CODEC_SIZE
voice codec DRAM		CODEC_SIZE (if talk_voice_required())
PCM buffers/descriptors	audiobufend - (pcmbuf_size + pcmbufdesc_size + PCMBUF_MIX_CHUNK*2)	pcmbuf_size + pcmbufdesc_size
PCM crossfade buffer	audiobufend - PCMBUF_MIX_CHUNK*2	PCMBUF_MIX_CHUNK
PCM voice mix buffer	audiobufend - PCMBUF_MIX_CHUNK	PCMBUF_MIX_CHUNK
(end)	audiobufend

Notes:

The allocations for dircache through to codec malloc buffer are all allocated during initialisation using buffer_alloc, hence changing the value of audiobuf.
In pcmbuf_init, the comment shows layout ...CODECBUFFER|---------PCMBUF---------|GUARDBUF|DESCS| - is this a seperate guard buffer, or a mistake?

(to be added)

r15 - 06 Oct 2008 - 16:37:41 - MarcoenHirschberg

Revision r14 - 19 Jun 2007 - 16:18 - MarcoenHirschberg
Revision r13 - 13 Apr 2007 - 15:13 - MarcoenHirschberg