2 * Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
4 * This file is part of libswresample
6 * libswresample is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * libswresample is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with libswresample; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/avassert.h"
22 #include "libavutil/common.h"
23 #include "libavutil/audioconvert.h"
24 #include "swresample.h"
29 #define ASSERT_LEVEL 2
31 static double get(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f){
33 if(av_sample_fmt_is_planar(f)){
34 f= av_get_alt_sample_fmt(f, 0);
38 index= ch + index*ch_count;
42 case AV_SAMPLE_FMT_U8 : return ((const uint8_t*)p)[index]/255.0*2-1.0;
43 case AV_SAMPLE_FMT_S16: return ((const int16_t*)p)[index]/32767.0;
44 case AV_SAMPLE_FMT_S32: return ((const int32_t*)p)[index]/2147483647.0;
45 case AV_SAMPLE_FMT_FLT: return ((const float *)p)[index];
46 case AV_SAMPLE_FMT_DBL: return ((const double *)p)[index];
47 default: av_assert0(0);
51 static void set(uint8_t *a[], int ch, int index, int ch_count, enum AVSampleFormat f, double v){
53 if(av_sample_fmt_is_planar(f)){
54 f= av_get_alt_sample_fmt(f, 0);
58 index= ch + index*ch_count;
61 case AV_SAMPLE_FMT_U8 : ((uint8_t*)p)[index]= (v+1.0)*255.0/2; break;
62 case AV_SAMPLE_FMT_S16: ((int16_t*)p)[index]= v*32767; break;
63 case AV_SAMPLE_FMT_S32: ((int32_t*)p)[index]= v*2147483647; break;
64 case AV_SAMPLE_FMT_FLT: ((float *)p)[index]= v; break;
65 case AV_SAMPLE_FMT_DBL: ((double *)p)[index]= v; break;
66 default: av_assert2(0);
70 static void shift(uint8_t *a[], int index, int ch_count, enum AVSampleFormat f){
73 if(av_sample_fmt_is_planar(f)){
74 f= av_get_alt_sample_fmt(f, 0);
75 for(ch= 0; ch<ch_count; ch++)
76 a[ch] += index*av_get_bytes_per_sample(f);
78 a[0] += index*ch_count*av_get_bytes_per_sample(f);
86 AV_CH_LAYOUT_SURROUND ,
87 AV_CH_LAYOUT_4POINT0 ,
90 AV_CH_LAYOUT_5POINT0 ,
91 AV_CH_LAYOUT_5POINT1 ,
92 AV_CH_LAYOUT_5POINT0_BACK ,
93 AV_CH_LAYOUT_5POINT1_BACK ,
94 AV_CH_LAYOUT_7POINT0 ,
95 AV_CH_LAYOUT_7POINT1 ,
96 AV_CH_LAYOUT_7POINT1_WIDE ,
100 static void setup_array(uint8_t *out[SWR_CH_MAX], uint8_t *in, enum AVSampleFormat format, int samples){
101 if(av_sample_fmt_is_planar(format)){
103 int plane_size= av_get_bytes_per_sample(format&0xFF)*samples;
105 for(i=0; i<SWR_CH_MAX; i++){
106 out[i]= in + i*plane_size;
113 int main(int argc, char **argv){
114 int in_sample_rate, out_sample_rate, ch ,i, in_ch_layout_index, out_ch_layout_index, osr, flush_count;
115 uint64_t in_ch_layout, out_ch_layout;
116 enum AVSampleFormat in_sample_fmt, out_sample_fmt;
117 int sample_rates[]={8000,11025,16000,22050,32000};
118 uint8_t array_in[SAMPLES*8*8];
119 uint8_t array_mid[SAMPLES*8*8*3];
120 uint8_t array_out[SAMPLES*8*8+100];
121 uint8_t *ain[SWR_CH_MAX];
122 uint8_t *aout[SWR_CH_MAX];
123 uint8_t *amid[SWR_CH_MAX];
126 struct SwrContext * forw_ctx= NULL;
127 struct SwrContext *backw_ctx= NULL;
129 in_sample_rate=16000;
130 for(osr=0; osr<5; osr++){
131 out_sample_rate= sample_rates[osr];
132 for(in_sample_fmt= AV_SAMPLE_FMT_U8; in_sample_fmt<=AV_SAMPLE_FMT_DBL; in_sample_fmt++){
133 for(out_sample_fmt= AV_SAMPLE_FMT_U8; out_sample_fmt<=AV_SAMPLE_FMT_DBL; out_sample_fmt++){
134 for(in_ch_layout_index=0; layouts[in_ch_layout_index]; in_ch_layout_index++){
136 in_ch_layout= layouts[in_ch_layout_index];
137 in_ch_count= av_get_channel_layout_nb_channels(in_ch_layout);
138 for(out_ch_layout_index=0; layouts[out_ch_layout_index]; out_ch_layout_index++){
139 int out_count, mid_count, out_ch_count;
140 out_ch_layout= layouts[out_ch_layout_index];
141 out_ch_count= av_get_channel_layout_nb_channels(out_ch_layout);
142 fprintf(stderr, "ch %d->%d, rate:%5d->%5d, fmt:%s->%s",
143 in_ch_count, out_ch_count,
144 in_sample_rate, out_sample_rate,
145 av_get_sample_fmt_name(in_sample_fmt), av_get_sample_fmt_name(out_sample_fmt));
146 forw_ctx = swr_alloc_set_opts(forw_ctx, out_ch_layout, av_get_alt_sample_fmt(out_sample_fmt, 1), out_sample_rate,
147 in_ch_layout, av_get_alt_sample_fmt( in_sample_fmt, 1), in_sample_rate,
149 backw_ctx = swr_alloc_set_opts(backw_ctx, in_ch_layout, in_sample_fmt, in_sample_rate,
150 out_ch_layout, av_get_alt_sample_fmt(out_sample_fmt, 1), out_sample_rate,
152 if(swr_init( forw_ctx) < 0)
153 fprintf(stderr, "swr_init(->) failed\n");
154 if(swr_init(backw_ctx) < 0)
155 fprintf(stderr, "swr_init(<-) failed\n");
157 fprintf(stderr, "Failed to init forw_cts\n");
159 fprintf(stderr, "Failed to init backw_ctx\n");
161 setup_array(ain , array_in , av_get_alt_sample_fmt( in_sample_fmt, 1), SAMPLES);
162 setup_array(amid, array_mid, av_get_alt_sample_fmt(out_sample_fmt, 1), 3*SAMPLES);
163 setup_array(aout, array_out, in_sample_fmt , SAMPLES);
164 for(ch=0; ch<in_ch_count; ch++){
165 for(i=0; i<SAMPLES; i++)
166 set(ain, ch, i, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1), sin(i*i*3/SAMPLES));
168 mid_count= swr_convert(forw_ctx, amid, 3*SAMPLES, ain, SAMPLES);
169 out_count= swr_convert(backw_ctx,aout, SAMPLES, amid, mid_count);
171 for(ch=0; ch<in_ch_count; ch++){
172 double sse, x, maxdiff=0;
178 for(i=0; i<out_count; i++){
179 double a= get(ain , ch, i, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
180 double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
186 maxdiff= FFMAX(maxdiff, FFABS(a-b));
189 sse= sum_aa + sum_bb*x*x - 2*x*sum_ab;
191 fprintf(stderr, "[%f %f %f] len:%5d\n", sqrt(sse/out_count), x, maxdiff, out_count);
196 flush_count = swr_convert(backw_ctx,aout, flush_i, 0, 0);
197 shift(aout, flush_i, in_ch_count, in_sample_fmt);
198 flush_count+= swr_convert(backw_ctx,aout, SAMPLES-flush_i, 0, 0);
199 shift(aout, -flush_i, in_ch_count, in_sample_fmt);
201 for(ch=0; ch<in_ch_count; ch++){
202 double sse, x, maxdiff=0;
208 for(i=0; i<flush_count; i++){
209 double a= get(ain , ch, i+out_count, in_ch_count, av_get_alt_sample_fmt(in_sample_fmt, 1));
210 double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
216 maxdiff= FFMAX(maxdiff, FFABS(a-b));
219 sse= sum_aa + sum_bb*x*x - 2*x*sum_ab;
221 fprintf(stderr, "[%f %f %f] len:%5d F:%3d\n", sqrt(sse/flush_count), x, maxdiff, flush_count, flush_i);
226 fprintf(stderr, "\n");