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audio/mp3: Move L3_Frequency_Inversion to Go

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This commit is contained in:
Hajime Hoshi 2017-06-15 01:40:42 +09:00
parent 91c022dcda
commit 9e002e3e52
3 changed files with 10 additions and 15 deletions
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9
audio/mp3/l3.go
View File

@ -52,6 +52,15 @@ func L3_Hybrid_Synthesis(gr C.unsigned, ch C.unsigned) {
}
}
//export L3_Frequency_Inversion
func L3_Frequency_Inversion(gr C.unsigned, ch C.unsigned) {
for sb := 1; sb < 32; sb += 2 { //OPT? : for(sb = 18; sb < 576; sb += 36)
for i := 1; i < 18; i += 2 {
C.g_main_data.is[gr][ch][sb*18+i] = -C.g_main_data.is[gr][ch][sb*18+i]
}
}
}
var (
g_synth_n_win = [64][32]float32{}
v_vec = [2][1024]float32{}

15
audio/mp3/pdmp3.c
View File

@ -45,7 +45,6 @@ static void audio_write_raw(unsigned *samples,unsigned nsamples);
static void Decode_L3_Init_Song(void);
static void Error(const char *s,int e);
static void L3_Antialias(unsigned gr,unsigned ch);
static void L3_Frequency_Inversion(unsigned gr,unsigned ch);
static void L3_Requantize(unsigned gr,unsigned ch);
static void L3_Reorder(unsigned gr,unsigned ch);
static void L3_Stereo(unsigned gr);
@ -459,20 +458,6 @@ static void L3_Antialias(unsigned gr,unsigned ch){
return; /* Done */
}
/**Description: TBD
* Parameters: TBD
* Return value: TBD
* Author: Krister Lagerström(krister@kmlager.com) **/
static void L3_Frequency_Inversion(unsigned gr,unsigned ch){
unsigned sb,i;
for(sb = 1; sb < 32; sb += 2) { //OPT? : for(sb = 18; sb < 576; sb += 36)
for(i = 1; i < 18; i += 2)
g_main_data.is[gr][ch][sb*18 + i] = -g_main_data.is[gr][ch][sb*18 + i];
}
return; /* Done */
}
/**Description: TBD
* Parameters: TBD
* Return value: TBD

1
audio/mp3/pdmp3.h
View File

@ -100,6 +100,7 @@ static int Read_Header(void);
void Read_Huffman(unsigned part_2_start,unsigned gr,unsigned ch);
void L3_Hybrid_Synthesis(unsigned gr,unsigned ch);
void L3_Frequency_Inversion(unsigned gr,unsigned ch);
void L3_Subband_Synthesis(unsigned gr,unsigned ch, unsigned* outdata);
int Read_CRC(void);