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1 | /* | |
2 | * Copyright (C) 2013 nu774 | |
3 | * For conditions of distribution and use, see copyright notice in COPYING | |
4 | */ | |
5 | #if HAVE_CONFIG_H | |
6 | # include "config.h" | |
7 | #endif | |
8 | #if HAVE_STDINT_H | |
9 | # include <stdint.h> | |
10 | #endif | |
11 | #include <stdlib.h> | |
12 | #include <math.h> | |
13 | #include "lpcm.h" | |
14 | #include "m4af_endian.h" | |
15 | ||
16 | static | |
17 | inline float pcm_i2f(int32_t n) | |
18 | { | |
19 | union { | |
20 | int32_t ivalue; | |
21 | float fvalue; | |
22 | } u; | |
23 | u.ivalue = n; | |
24 | return u.fvalue; | |
25 | } | |
26 | static | |
27 | inline double pcm_i2d(int64_t n) | |
28 | { | |
29 | union { | |
30 | int64_t ivalue; | |
31 | double fvalue; | |
32 | } u; | |
33 | u.ivalue = n; | |
34 | return u.fvalue; | |
35 | } | |
36 | static | |
37 | inline int16_t pcm_quantize_s32(int32_t n) | |
38 | { | |
39 | n = ((n >> 15) + 1) >> 1; | |
40 | return (n == 0x8000) ? 0x7fff : n; | |
41 | } | |
42 | static | |
43 | inline int16_t pcm_quantize_f64(double v) | |
44 | { | |
45 | return (int16_t)lrint(pcm_clip(v * 32768.0, -32768.0, 32767.0)); | |
46 | } | |
47 | static | |
48 | inline int16_t pcm_s8_to_s16(int8_t n) | |
49 | { | |
50 | return n << 8; | |
51 | } | |
52 | static | |
53 | inline int16_t pcm_u8_to_s16(uint8_t n) | |
54 | { | |
55 | return (n << 8) ^ 0x8000; | |
56 | } | |
57 | static | |
58 | inline int16_t pcm_s16le_to_s16(int16_t n) | |
59 | { | |
60 | return m4af_ltoh16(n); | |
61 | } | |
62 | static | |
63 | inline int16_t pcm_s16be_to_s16(int16_t n) | |
64 | { | |
65 | return m4af_btoh16(n); | |
66 | } | |
67 | static | |
68 | inline int16_t pcm_u16le_to_s16(uint16_t n) | |
69 | { | |
70 | return m4af_ltoh16(n) ^ 0x8000; | |
71 | } | |
72 | static | |
73 | inline int16_t pcm_u16be_to_s16(uint16_t n) | |
74 | { | |
75 | return m4af_btoh16(n) ^ 0x8000; | |
76 | } | |
77 | static | |
78 | inline int32_t pcm_s24le_to_s32(uint8_t *p) | |
79 | { | |
80 | return p[0]<<8 | p[1]<<16 | p[2]<<24; | |
81 | } | |
82 | static | |
83 | inline int32_t pcm_s24be_to_s32(uint8_t *p) | |
84 | { | |
85 | return p[0]<<24 | p[1]<<16 | p[2]<<8; | |
86 | } | |
87 | static | |
88 | inline int32_t pcm_u24le_to_s32(uint8_t *p) | |
89 | { | |
90 | return pcm_s24le_to_s32(p) ^ 0x80000000; | |
91 | } | |
92 | static | |
93 | inline int32_t pcm_u24be_to_s32(uint8_t *p) | |
94 | { | |
95 | return pcm_s24be_to_s32(p) ^ 0x80000000; | |
96 | } | |
97 | static | |
98 | inline int16_t pcm_s24le_to_s16(uint8_t *p) | |
99 | { | |
100 | return pcm_quantize_s32(pcm_s24le_to_s32(p)); | |
101 | } | |
102 | static | |
103 | inline int16_t pcm_s24be_to_s16(uint8_t *p) | |
104 | { | |
105 | return pcm_quantize_s32(pcm_s24be_to_s32(p)); | |
106 | } | |
107 | static | |
108 | inline int16_t pcm_u24le_to_s16(uint8_t *p) | |
109 | { | |
110 | return pcm_quantize_s32(pcm_u24le_to_s32(p)); | |
111 | } | |
112 | static | |
113 | inline int16_t pcm_u24be_to_s16(uint8_t *p) | |
114 | { | |
115 | return pcm_quantize_s32(pcm_u24be_to_s32(p)); | |
116 | } | |
117 | static | |
118 | inline int16_t pcm_s32le_to_s16(int32_t n) | |
119 | { | |
120 | return pcm_quantize_s32(m4af_ltoh32(n)); | |
121 | } | |
122 | static | |
123 | inline int16_t pcm_s32be_to_s16(int32_t n) | |
124 | { | |
125 | return pcm_quantize_s32(m4af_btoh32(n)); | |
126 | } | |
127 | static | |
128 | inline int16_t pcm_u32le_to_s16(int32_t n) | |
129 | { | |
130 | return pcm_quantize_s32(m4af_ltoh32(n) ^ 0x80000000); | |
131 | } | |
132 | static | |
133 | inline int16_t pcm_u32be_to_s16(int32_t n) | |
134 | { | |
135 | return pcm_quantize_s32(m4af_btoh32(n) ^ 0x80000000); | |
136 | } | |
137 | static | |
138 | inline int16_t pcm_f32le_to_s16(int32_t n) | |
139 | { | |
140 | return pcm_quantize_f64(pcm_i2f(m4af_ltoh32(n))); | |
141 | } | |
142 | static | |
143 | inline int16_t pcm_f32be_to_s16(int32_t n) | |
144 | { | |
145 | return pcm_quantize_f64(pcm_i2f(m4af_btoh32(n))); | |
146 | } | |
147 | static | |
148 | inline int16_t pcm_f64le_to_s16(int64_t n) | |
149 | { | |
150 | return pcm_quantize_f64(pcm_i2d(m4af_ltoh64(n))); | |
151 | } | |
152 | static | |
153 | inline int16_t pcm_f64be_to_s16(int64_t n) | |
154 | { | |
155 | return pcm_quantize_f64(pcm_i2d(m4af_btoh64(n))); | |
156 | } | |
157 | ||
158 | int pcm_convert_to_native_sint16(const pcm_sample_description_t *format, | |
159 | const void *input, uint32_t nframes, | |
160 | int16_t *result) | |
161 | { | |
162 | #define CONVERT(type, conv) \ | |
163 | do { \ | |
164 | unsigned i; \ | |
165 | type *ip = (type *)input; \ | |
166 | for (i = 0; i < count; ++i) { \ | |
167 | result[i] = conv(ip[i]); \ | |
168 | } \ | |
169 | } while(0) | |
170 | ||
171 | #define CONVERT_BYTES(conv) \ | |
172 | do { \ | |
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; \ | |
179 | } \ | |
180 | } while(0) | |
181 | ||
182 | uint32_t count = nframes * format->channels_per_frame; | |
183 | if (!count) | |
184 | return 0; | |
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; | |
222 | default: | |
223 | return -1; | |
224 | } | |
225 | return 0; | |
226 | } |