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aacdec: move fixed-point clipping to a separate function

This commit is contained in:
Lynne 2024-03-16 04:29:07 +01:00
parent 87a93a5670
commit 41c04bec0a
No known key found for this signature in database
GPG Key ID: A2FEA5F03F034464
3 changed files with 20 additions and 14 deletions
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17
libavcodec/aac/aacdec_dsp_template.c
View File

@ -554,6 +554,21 @@ static void AAC_RENAME(imdct_and_windowing_eld)(AACDecContext *ac, SingleChannel
memcpy( saved, buf, n * sizeof(*saved));
}
static void AAC_RENAME(clip_output)(AACDecContext *ac, ChannelElement *che,
int type, int samples)
{
#if USE_FIXED
/* preparation for resampler */
for (int j = 0; j < samples; j++){
che->ch[0].output_fixed[j] = (int32_t)av_clip64((int64_t)che->ch[0].output_fixed[j]*128,
INT32_MIN, INT32_MAX-0x8000)+0x8000;
if (type == TYPE_CPE || (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1))
che->ch[1].output_fixed[j] = (int32_t)av_clip64((int64_t)che->ch[1].output_fixed[j]*128,
INT32_MIN, INT32_MAX-0x8000)+0x8000;
}
#endif
}
const AACDecDSP AAC_RENAME(aac_dsp) = {
.init_tables = &AAC_RENAME(init_tables),
@ -571,4 +586,6 @@ const AACDecDSP AAC_RENAME(aac_dsp) = {
.apply_dependent_coupling = AAC_RENAME(apply_dependent_coupling),
.apply_independent_coupling = AAC_RENAME(apply_independent_coupling),
.clip_output = AAC_RENAME(clip_output),
};

2
libavcodec/aacdec.h
View File

@ -239,6 +239,8 @@ typedef struct AACDecDSP {
void (*imdct_and_windowing_960)(AACDecContext *ac, SingleChannelElement *sce);
void (*imdct_and_windowing_ld)(AACDecContext *ac, SingleChannelElement *sce);
void (*imdct_and_windowing_eld)(AACDecContext *ac, SingleChannelElement *sce);
void (*clip_output)(AACDecContext *ac, ChannelElement *che, int type, int samples);
} AACDecDSP;
/**

15
libavcodec/aacdec_template.c
View File

@ -2129,20 +2129,7 @@ static void spectral_to_sample(AACDecContext *ac, int samples)
}
if (type <= TYPE_CCE)
apply_channel_coupling(ac, che, type, i, AFTER_IMDCT, ac->dsp.apply_independent_coupling);
#if USE_FIXED
{
int j;
/* preparation for resampler */
for(j = 0; j<samples; j++){
che->ch[0].output_fixed[j] = (int32_t)av_clip64((int64_t)che->ch[0].output_fixed[j]*128,
INT32_MIN, INT32_MAX-0x8000)+0x8000;
if (type == TYPE_CPE || (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1))
che->ch[1].output_fixed[j] = (int32_t)av_clip64((int64_t)che->ch[1].output_fixed[j]*128,
INT32_MIN, INT32_MAX-0x8000)+0x8000;
}
}
#endif /* USE_FIXED */
ac->dsp.clip_output(ac, che, type, samples);
che->present = 0;
} else if (che) {
av_log(ac->avctx, AV_LOG_VERBOSE, "ChannelElement %d.%d missing \n", type, i);