1 /*
2 * audio conversion
3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * audio conversion
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #include "libavutil/avstring.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/libm.h"
31 #include "libavutil/samplefmt.h"
32 #include "audioconvert.h"
33
34
35 #define CONV_FUNC_NAME(dst_fmt, src_fmt) conv_ ## src_fmt ## _to_ ## dst_fmt
36
37 //FIXME rounding ?
38 #define CONV_FUNC(ofmt, otype, ifmt, expr)\
39 static void CONV_FUNC_NAME(ofmt, ifmt)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end)\
40 {\
41 uint8_t *end2 = end - 3*os;\
42 while(po < end2){\
43 *(otype*)po = expr; pi += is; po += os;\
44 *(otype*)po = expr; pi += is; po += os;\
45 *(otype*)po = expr; pi += is; po += os;\
46 *(otype*)po = expr; pi += is; po += os;\
47 }\
48 while(po < end){\
49 *(otype*)po = expr; pi += is; po += os;\
50 }\
51 }
52
53 //FIXME put things below under ifdefs so we do not waste space for cases no codec will need
54 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_U8 , *(const uint8_t*)pi)
55 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<8)
56 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)<<24)
57 CONV_FUNC(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0f/ (1<<7)))
58 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_U8 , (*(const uint8_t*)pi - 0x80)*(1.0 / (1<<7)))
59 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_S16, (*(const int16_t*)pi>>8) + 0x80)
60 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S16, *(const int16_t*)pi)
61 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S16, *(const int16_t*)pi<<16)
62 CONV_FUNC(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0f/ (1<<15)))
63 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S16, *(const int16_t*)pi*(1.0 / (1<<15)))
64 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_S32, (*(const int32_t*)pi>>24) + 0x80)
65 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_S32, *(const int32_t*)pi>>16)
66 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_S32, *(const int32_t*)pi)
67 CONV_FUNC(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0f/ (1U<<31)))
68 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_S32, *(const int32_t*)pi*(1.0 / (1U<<31)))
69 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8( lrintf(*(const float*)pi * (1<<7)) + 0x80))
70 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16( lrintf(*(const float*)pi * (1<<15))))
71 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float*)pi * (1U<<31))))
72 CONV_FUNC(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_FLT, *(const float*)pi)
73 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_FLT, *(const float*)pi)
74 CONV_FUNC(AV_SAMPLE_FMT_U8 , uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8( lrint(*(const double*)pi * (1<<7)) + 0x80))
75 CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16( lrint(*(const double*)pi * (1<<15))))
76 CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double*)pi * (1U<<31))))
77 CONV_FUNC(AV_SAMPLE_FMT_FLT, float , AV_SAMPLE_FMT_DBL, *(const double*)pi)
78 CONV_FUNC(AV_SAMPLE_FMT_DBL, double , AV_SAMPLE_FMT_DBL, *(const double*)pi)
79
80 #define FMT_PAIR_FUNC(out, in) [(out) + AV_SAMPLE_FMT_NB*(in)] = CONV_FUNC_NAME(out, in)
81
82 static conv_func_type * const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB*AV_SAMPLE_FMT_NB] = {
83 FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_U8 ),
84 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8 ),
85 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8 ),
86 FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8 ),
87 FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8 ),
88 FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_S16),
89 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16),
90 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16),
91 FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16),
92 FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16),
93 FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_S32),
94 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32),
95 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32),
96 FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32),
97 FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32),
98 FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_FLT),
99 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT),
100 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT),
101 FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT),
102 FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT),
103 FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8 , AV_SAMPLE_FMT_DBL),
104 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL),
105 FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL),
106 FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL),
107 FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL),
108 };
109
cpy1(uint8_t ** dst,const uint8_t ** src,int len)110 static void cpy1(uint8_t **dst, const uint8_t **src, int len){
111 memcpy(*dst, *src, len);
112 }
cpy2(uint8_t ** dst,const uint8_t ** src,int len)113 static void cpy2(uint8_t **dst, const uint8_t **src, int len){
114 memcpy(*dst, *src, 2*len);
115 }
cpy4(uint8_t ** dst,const uint8_t ** src,int len)116 static void cpy4(uint8_t **dst, const uint8_t **src, int len){
117 memcpy(*dst, *src, 4*len);
118 }
cpy8(uint8_t ** dst,const uint8_t ** src,int len)119 static void cpy8(uint8_t **dst, const uint8_t **src, int len){
120 memcpy(*dst, *src, 8*len);
121 }
122
swri_audio_convert_alloc(enum AVSampleFormat out_fmt,enum AVSampleFormat in_fmt,int channels,const int * ch_map,int flags)123 AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
124 enum AVSampleFormat in_fmt,
125 int channels, const int *ch_map,
126 int flags)
127 {
128 AudioConvert *ctx;
129 conv_func_type *f = fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt) + AV_SAMPLE_FMT_NB*av_get_packed_sample_fmt(in_fmt)];
130
131 if (!f)
132 return NULL;
133 ctx = av_mallocz(sizeof(*ctx));
134 if (!ctx)
135 return NULL;
136
137 if(channels == 1){
138 in_fmt = av_get_planar_sample_fmt( in_fmt);
139 out_fmt = av_get_planar_sample_fmt(out_fmt);
140 }
141
142 ctx->channels = channels;
143 ctx->conv_f = f;
144 ctx->ch_map = ch_map;
145 if (in_fmt == AV_SAMPLE_FMT_U8 || in_fmt == AV_SAMPLE_FMT_U8P)
146 memset(ctx->silence, 0x80, sizeof(ctx->silence));
147
148 if(out_fmt == in_fmt && !ch_map) {
149 switch(av_get_bytes_per_sample(in_fmt)){
150 case 1:ctx->simd_f = cpy1; break;
151 case 2:ctx->simd_f = cpy2; break;
152 case 4:ctx->simd_f = cpy4; break;
153 case 8:ctx->simd_f = cpy8; break;
154 }
155 }
156
157 #if (HAVE_YASM == 1) && (HAVE_MMX == 1)
158 if(HAVE_YASM && HAVE_MMX) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);
159 #endif
160 #if (ARCH_ARM == 1)
161 if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);
162 #endif
163 #if (ARCH_AARCH64 == 1)
164 if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);
165 #endif
166
167 return ctx;
168 }
169
swri_audio_convert_free(AudioConvert ** ctx)170 void swri_audio_convert_free(AudioConvert **ctx)
171 {
172 av_freep(ctx);
173 }
174
swri_audio_convert(AudioConvert * ctx,AudioData * out,AudioData * in,int len)175 int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len)
176 {
177 int ch;
178 int off=0;
179 const int os= (out->planar ? 1 :out->ch_count) *out->bps;
180 unsigned misaligned = 0;
181
182 av_assert0(ctx->channels == out->ch_count);
183
184 if (ctx->in_simd_align_mask) {
185 int planes = in->planar ? in->ch_count : 1;
186 unsigned m = 0;
187 for (ch = 0; ch < planes; ch++)
188 m |= (intptr_t)in->ch[ch];
189 misaligned |= m & ctx->in_simd_align_mask;
190 }
191 if (ctx->out_simd_align_mask) {
192 int planes = out->planar ? out->ch_count : 1;
193 unsigned m = 0;
194 for (ch = 0; ch < planes; ch++)
195 m |= (intptr_t)out->ch[ch];
196 misaligned |= m & ctx->out_simd_align_mask;
197 }
198
199 //FIXME optimize common cases
200
201 if(ctx->simd_f && !ctx->ch_map && !misaligned){
202 off = len&~15;
203 av_assert1(off>=0);
204 av_assert1(off<=len);
205 av_assert2(ctx->channels == SWR_CH_MAX || !in->ch[ctx->channels]);
206 if(off>0){
207 if(out->planar == in->planar){
208 int planes = out->planar ? out->ch_count : 1;
209 for(ch=0; ch<planes; ch++){
210 ctx->simd_f(out->ch+ch, (const uint8_t **)in->ch+ch, off * (out->planar ? 1 :out->ch_count));
211 }
212 }else{
213 ctx->simd_f(out->ch, (const uint8_t **)in->ch, off);
214 }
215 }
216 if(off == len)
217 return 0;
218 }
219
220 for(ch=0; ch<ctx->channels; ch++){
221 const int ich= ctx->ch_map ? ctx->ch_map[ch] : ch;
222 const int is= ich < 0 ? 0 : (in->planar ? 1 : in->ch_count) * in->bps;
223 const uint8_t *pi= ich < 0 ? ctx->silence : in->ch[ich];
224 uint8_t *po= out->ch[ch];
225 uint8_t *end= po + os*len;
226 if(!po)
227 continue;
228 ctx->conv_f(po+off*os, pi+off*is, is, os, end);
229 }
230 return 0;
231 }
232