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Apply a bunch of simple AAC decoder optimizations. Biggest speedup is on ColdFire targets, but ARM targets benefits too. Allows realtime playback of some AAC files on Iriver targets (H1x0, H3x0). Remove support for some rarely used AAC profiles to reduce code size a bit.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11038 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Magnus Holmgren 2006-09-24 19:00:29 +00:00
parent 0e5bd54cbb
commit 3fa5e5f592
11 changed files with 62 additions and 41 deletions
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18
apps/codecs/libfaad/syntax.c
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@ -559,7 +559,7 @@ void raw_data_block(NeAACDecHandle hDecoder, NeAACDecFrameInfo *hInfo,
/* Table 4.4.4 and */
/* Table 4.4.9 */
ALIGN int16_t spec_data[1024] = {0};
element sce IBSS_ATTR;
element sce;
static uint8_t single_lfe_channel_element(NeAACDecHandle hDecoder, bitfile *ld,
uint8_t channel, uint8_t *tag)
{
@ -603,9 +603,9 @@ static uint8_t single_lfe_channel_element(NeAACDecHandle hDecoder, bitfile *ld,
}
/* Table 4.4.5 */
ALIGN int16_t spec_data1[1024];
ALIGN int16_t spec_data2[1024];
element cpe IBSS_ATTR;
ALIGN int16_t spec_data1[1024] IBSS_ATTR;
ALIGN int16_t spec_data2[1024] IBSS_ATTR;
element cpe;
static uint8_t channel_pair_element(NeAACDecHandle hDecoder, bitfile *ld,
uint8_t channels, uint8_t *tag)
{
@ -833,6 +833,8 @@ static uint8_t ics_info(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld,
}
#endif
}
#else
(void) common_window;
#endif
}
}
@ -1166,8 +1168,8 @@ static void gain_control_data(bitfile *ld, ic_stream *ics)
#endif
#ifdef SCALABLE_DEC
ALIGN int16_t spec_data1[1024] IBSS_ATTR;
ALIGN int16_t spec_data2[1024] IBSS_ATTR;
ALIGN int16_t spec_data1[1024];
ALIGN int16_t spec_data2[1024];
/* Table 4.4.13 ASME */
void aac_scalable_main_element(NeAACDecHandle hDecoder, NeAACDecFrameInfo *hInfo,
bitfile *ld, program_config *pce, drc_info *drc)
@ -1610,6 +1612,8 @@ static uint8_t section_data(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld
#ifdef ERROR_RESILIENCE
if (hDecoder->aacSectionDataResilienceFlag)
sect_cb_bits = 5;
#else
(void) hDecoder;
#endif
ics->sect_cb[g][i] = (uint8_t)faad_getbits(ld, sect_cb_bits
@ -1797,6 +1801,8 @@ static uint8_t scale_factor_data(NeAACDecHandle hDecoder, ic_stream *ics, bitfil
#ifdef ERROR_RESILIENCE
if (!hDecoder->aacScalefactorDataResilienceFlag)
{
#else
(void) hDecoder;
#endif
ret = decode_scale_factors(ics, ld);
#ifdef ERROR_RESILIENCE