FFmpeg: libswresample/audioconvert.c Source File

FFmpeg
audioconvert.c
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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 
110 static void cpy1(uint8_t **dst, const uint8_t **src, int len){
111  memcpy(*dst, *src, len);
112 }
113 static void cpy2(uint8_t **dst, const uint8_t **src, int len){
114  memcpy(*dst, *src, 2*len);
115 }
116 static void cpy4(uint8_t **dst, const uint8_t **src, int len){
117  memcpy(*dst, *src, 4*len);
118 }
119 static void cpy8(uint8_t **dst, const uint8_t **src, int len){
120  memcpy(*dst, *src, 8*len);
121 }
122 
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 && HAVE_MMX) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);
158  if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);
159 
160  return ctx;
161 }
162 
163 void swri_audio_convert_free(AudioConvert **ctx)
164 {
165  av_freep(ctx);
166 }
167 
168 int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len)
169 {
170  int ch;
171  int off=0;
172  const int os= (out->planar ? 1 :out->ch_count) *out->bps;
173  unsigned misaligned = 0;
174 
175  av_assert0(ctx->channels == out->ch_count);
176 
177  if (ctx->in_simd_align_mask) {
178  int planes = in->planar ? in->ch_count : 1;
179  unsigned m = 0;
180  for (ch = 0; ch < planes; ch++)
181  m |= (intptr_t)in->ch[ch];
182  misaligned |= m & ctx->in_simd_align_mask;
183  }
184  if (ctx->out_simd_align_mask) {
185  int planes = out->planar ? out->ch_count : 1;
186   unsigned m = 0;
187   for (ch = 0; ch < planes; ch++)
188  m |= (intptr_t)out->ch[ch];
189  misaligned |= m & ctx->out_simd_align_mask;
190  }
191 
192  //FIXME optimize common cases
193 
194  if(ctx->simd_f && !ctx->ch_map && !misaligned){
195  off = len&~15;
196  av_assert1(off>=0);
197  av_assert1(off<=len);
198  av_assert2(ctx->channels == SWR_CH_MAX || !in->ch[ctx->channels]);
199  if(off>0){
200  if(out->planar == in->planar){
201  int planes = out->planar ? out->ch_count : 1;
202  for(ch=0; ch<planes; ch++){
203  ctx->simd_f(out->ch+ch, (const uint8_t **)in->ch+ch, off * (out->planar ? 1 :out->ch_count));
204  }
205  }else{
206  ctx->simd_f(out->ch, (const uint8_t **)in->ch, off);
207  }
208  }
209  if(off == len)
210  return 0;
211  }
212 
213   for(ch=0; ch<ctx->channels; ch++){
214  const int ich= ctx->ch_map ? ctx->ch_map[ch] : ch;
215  const int is= ich < 0 ? 0 : (in->planar ? 1 : in->ch_count) * in->bps;
216  const uint8_t *pi= ich < 0 ? ctx->silence : in->ch[ich];
217  uint8_t *po= out->ch[ch];
218  uint8_t *end= po + os*len;
219  if(!po)
220  continue;
221  ctx->conv_f(po+off*os, pi+off*is, is, os, end);
222  }
223   return 0;
224 }
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