]>
iEval git - fdkaac.git/blob - src/lpcm.c
2 * Copyright (C) 2013 nu774
3 * For conditions of distribution and use, see copyright notice in COPYING
14 #include "m4af_endian.h"
17 inline float pcm_i2f(int32_t n
)
27 inline double pcm_i2d(int64_t n
)
37 inline int16_t pcm_quantize_s32(int32_t n
)
39 n
= ((n
>> 15) + 1) >> 1;
40 return (n
== 0x8000) ? 0x7fff : n
;
43 inline int16_t pcm_quantize_f64(double v
)
45 return (int16_t)lrint(pcm_clip(v
* 32768.0, -32768.0, 32767.0));
48 inline int16_t pcm_s8_to_s16(int8_t n
)
53 inline int16_t pcm_u8_to_s16(uint8_t n
)
55 return (n
<< 8) ^ 0x8000;
58 inline int16_t pcm_s16le_to_s16(int16_t n
)
60 return m4af_ltoh16(n
);
63 inline int16_t pcm_s16be_to_s16(int16_t n
)
65 return m4af_btoh16(n
);
68 inline int16_t pcm_u16le_to_s16(uint16_t n
)
70 return m4af_ltoh16(n
) ^ 0x8000;
73 inline int16_t pcm_u16be_to_s16(uint16_t n
)
75 return m4af_btoh16(n
) ^ 0x8000;
78 inline int32_t pcm_s24le_to_s32(uint8_t *p
)
80 return p
[0]<<8 | p
[1]<<16 | p
[2]<<24;
83 inline int32_t pcm_s24be_to_s32(uint8_t *p
)
85 return p
[0]<<24 | p
[1]<<16 | p
[2]<<8;
88 inline int32_t pcm_u24le_to_s32(uint8_t *p
)
90 return pcm_s24le_to_s32(p
) ^ 0x80000000;
93 inline int32_t pcm_u24be_to_s32(uint8_t *p
)
95 return pcm_s24be_to_s32(p
) ^ 0x80000000;
98 inline int16_t pcm_s24le_to_s16(uint8_t *p
)
100 return pcm_quantize_s32(pcm_s24le_to_s32(p
));
103 inline int16_t pcm_s24be_to_s16(uint8_t *p
)
105 return pcm_quantize_s32(pcm_s24be_to_s32(p
));
108 inline int16_t pcm_u24le_to_s16(uint8_t *p
)
110 return pcm_quantize_s32(pcm_u24le_to_s32(p
));
113 inline int16_t pcm_u24be_to_s16(uint8_t *p
)
115 return pcm_quantize_s32(pcm_u24be_to_s32(p
));
118 inline int16_t pcm_s32le_to_s16(int32_t n
)
120 return pcm_quantize_s32(m4af_ltoh32(n
));
123 inline int16_t pcm_s32be_to_s16(int32_t n
)
125 return pcm_quantize_s32(m4af_btoh32(n
));
128 inline int16_t pcm_u32le_to_s16(int32_t n
)
130 return pcm_quantize_s32(m4af_ltoh32(n
) ^ 0x80000000);
133 inline int16_t pcm_u32be_to_s16(int32_t n
)
135 return pcm_quantize_s32(m4af_btoh32(n
) ^ 0x80000000);
138 inline int16_t pcm_f32le_to_s16(int32_t n
)
140 return pcm_quantize_f64(pcm_i2f(m4af_ltoh32(n
)));
143 inline int16_t pcm_f32be_to_s16(int32_t n
)
145 return pcm_quantize_f64(pcm_i2f(m4af_btoh32(n
)));
148 inline int16_t pcm_f64le_to_s16(int64_t n
)
150 return pcm_quantize_f64(pcm_i2d(m4af_ltoh64(n
)));
153 inline int16_t pcm_f64be_to_s16(int64_t n
)
155 return pcm_quantize_f64(pcm_i2d(m4af_btoh64(n
)));
158 int pcm_convert_to_native_sint16(const pcm_sample_description_t
*format
,
159 const void *input
, uint32_t nframes
,
162 #define CONVERT(type, conv) \
165 type *ip = (type *)input; \
166 for (i = 0; i < count; ++i) { \
167 result[i] = conv(ip[i]); \
171 #define CONVERT_BYTES(conv) \
173 unsigned i, bytes_per_channel; \
174 uint8_t *ip = (uint8_t *)input; \
175 bytes_per_channel = PCM_BYTES_PER_CHANNEL(format); \
176 for (i = 0; i < count; ++i) { \
177 result[i] = conv(ip); \
178 ip += bytes_per_channel; \
182 uint32_t count
= nframes
* format
->channels_per_frame
;
185 switch (PCM_BYTES_PER_CHANNEL(format
) | format
->sample_type
<<4) {
186 case 1 | PCM_TYPE_SINT
<<4:
187 CONVERT(int8_t, pcm_s8_to_s16
); break;
188 case 1 | PCM_TYPE_UINT
<<4:
189 CONVERT(uint8_t, pcm_u8_to_s16
); break;
190 case 2 | PCM_TYPE_SINT
<<4:
191 CONVERT(int16_t, pcm_s16le_to_s16
); break;
192 case 2 | PCM_TYPE_UINT
<<4:
193 CONVERT(uint16_t, pcm_u16le_to_s16
); break;
194 case 2 | PCM_TYPE_SINT_BE
<<4:
195 CONVERT(int16_t, pcm_s16be_to_s16
); break;
196 case 2 | PCM_TYPE_UINT_BE
<<4:
197 CONVERT(int16_t, pcm_u16be_to_s16
); break;
198 case 3 | PCM_TYPE_SINT
<<4:
199 CONVERT_BYTES(pcm_s24le_to_s16
); break;
200 case 3 | PCM_TYPE_UINT
<<4:
201 CONVERT_BYTES(pcm_u24le_to_s16
); break;
202 case 3 | PCM_TYPE_SINT_BE
<<4:
203 CONVERT_BYTES(pcm_s24be_to_s16
); break;
204 case 3 | PCM_TYPE_UINT_BE
<<4:
205 CONVERT_BYTES(pcm_u24be_to_s16
); break;
206 case 4 | PCM_TYPE_SINT
<<4:
207 CONVERT(int32_t, pcm_s32le_to_s16
); break;
208 case 4 | PCM_TYPE_UINT
<<4:
209 CONVERT(uint32_t, pcm_u32le_to_s16
); break;
210 case 4 | PCM_TYPE_FLOAT
<<4:
211 CONVERT(int32_t, pcm_f32le_to_s16
); break;
212 case 4 | PCM_TYPE_SINT_BE
<<4:
213 CONVERT(int32_t, pcm_s32be_to_s16
); break;
214 case 4 | PCM_TYPE_UINT_BE
<<4:
215 CONVERT(uint32_t, pcm_u32be_to_s16
); break;
216 case 4 | PCM_TYPE_FLOAT_BE
<<4:
217 CONVERT(int32_t, pcm_f32be_to_s16
); break;
218 case 8 | PCM_TYPE_FLOAT
<<4:
219 CONVERT(int64_t, pcm_f64le_to_s16
); break;
220 case 8 | PCM_TYPE_FLOAT_BE
<<4:
221 CONVERT(int64_t, pcm_f64be_to_s16
); break;
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