len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2026-10-10 08:03:04 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

atrac3: keep the second window table out of small IRAM

Browse source 
b7170e03c4 added window_lookup_mid, 512 bytes, to IRAM on every
target. On the targets with 48KB of IRAM for a codec that left
the ATRAC3 codecs 48 bytes too large to link (iPod Color and the
other PP502x players with 96KB of IRAM).

Put the table in IRAM only on the targets with more, like the
decoder's other large tables. Nothing changes there.

Built for iPod Color, where the two codecs now have 476 bytes of
IRAM to spare, and for the iriver H120.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Michael Giacomelli 2026-10-06 22:18:33 -04:00
parent 02d5520c5f
commit fc1d445d69
1 changed files with 3 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

5
lib/rbcodec/codecs/libatrac/atrac3data_fixed.h
View file

@ -79,8 +79,9 @@ static const int32_t window_lookup[128] ICONST_ATTR MEM_ALIGN_ATTR = {
/* The window above is the first 128 points of the 512 point mdct window. /* The window above is the first 128 points of the 512 point mdct window.
* Points 128..255 are these values plus one, scaled by 2^31; they rise to * Points 128..255 are these values plus one, scaled by 2^31; they rise to
* 1.207 and fall back to 1. The second half of the window mirrors the * 1.207 and fall back to 1. The second half of the window mirrors the
* first. */ * first. In IRAM only where there is room: with it the codec does not fit
static const int32_t window_lookup_mid[128] ICONST_ATTR MEM_ALIGN_ATTR = { * the 48KB of the smaller targets. */
static const int32_t window_lookup_mid[128] ICONST_ATTR_LARGE_IRAM MEM_ALIGN_ATTR = {
0x00c7d1c8, 0x024fd962, 0x03cd6738, 0x05401bc8, 0x06a79e95, 0x08039e75, 0x00c7d1c8, 0x024fd962, 0x03cd6738, 0x05401bc8, 0x06a79e95, 0x08039e75,
0x0953d1d1, 0x0a97f6df, 0x0bcfd3c6, 0x0cfb36c3, 0x0e19f636, 0x0f2bf0a8, 0x0953d1d1, 0x0a97f6df, 0x0bcfd3c6, 0x0cfb36c3, 0x0e19f636, 0x0f2bf0a8,
0x10310cc9, 0x11293955, 0x12146d01, 0x12f2a64e, 0x13c3eb59, 0x148849a0, 0x10310cc9, 0x11293955, 0x12146d01, 0x12f2a64e, 0x13c3eb59, 0x148849a0,