解碼:

?
#include?<stdio.h>
#include?<stdlib.h>
#include?<stdint.h>
#include?<string.h>
#include?<unistd.h>
#include?<errno.h>
?
#include?"celt.h"
?
int
main(int?argc,?char?**argv)?{
????char?data[2048]?=?{?};
????short?pcm[2048]?=?{?};
????int?rate????????=?48000;
????int?framesize???=?960;
????int?channels????=?1;
????int?tmp;
????int?rem;
????void?*mode;
????void?*state;
????uint16_t?len;
?
????while?((tmp?=?getopt(argc,?argv,?"r:f:c:"))?!=?-1)?{
????????switch?(tmp)?{
??????????case?'r':
????????????rate?=?atoi(optarg);
????????????break;
??????????case?'f':
????????????framesize?=?atoi(optarg);
????????????break;
??????????case?'c':
????????????channels?=?atoi(optarg);
????????????break;
????????}
????}
????if?(!(mode?=?celt_mode_create(rate,?framesize,?&tmp)))?{
????????fprintf(stderr,?"error:?celt_mode_create:?%s\n",?celt_strerror(tmp));
????????return?1;
????}
????if?(!(state?=?celt_decoder_create_custom(mode,?channels,?&tmp)))?{
????????fprintf(stderr,?"error:?celt_decoder_create_custom:?%s\n",?celt_strerror(tmp));
????????celt_mode_destroy(mode);
????????return?1;
????}
?
????for?(len?=?0;;)?{
????????if?(!len)?{
????????????if?(read(STDIN_FILENO,?&len,?sizeof(len))?!=?sizeof(len))?{
????????????????break;
????????????}
????????????if?(len?>?sizeof(data))?{
????????????????fprintf(stderr,?"error:?celt?packet?larger?than?buffer\n");
????????????????celt_decoder_destroy(state);
????????????????celt_mode_destroy(mode);
????????????????return?1;
????????????}
????????????rem?=?len;
????????}
????????if?((tmp?=?read(STDIN_FILENO,?data?+?(len?-?rem),?rem))?<?0)?{
????????????fprintf(stderr,?"error:?read:?%s\n",?strerror(errno));
????????????celt_decoder_destroy(state);
????????????celt_mode_destroy(mode);
????????????return?1;
????????}
????????if?(!tmp)?{
????????????break;
????????}
????????if?(tmp?!=?rem)?{
????????????rem?-=?tmp;
????????????continue;
????????}
????????if?((tmp?=?celt_decode(state,?(void?*)data,?len,?pcm,?framesize))?<?0)?{
????????????fprintf(stderr,?"error:?celt_decode:?%s\n",?celt_strerror(tmp));
????????????celt_decoder_destroy(state);
????????????celt_mode_destroy(mode);
????????????return?1;
????????}
????????len?=?0;
????????if?(write(STDOUT_FILENO,?pcm,?sizeof(*pcm)?*?framesize?*?channels)?<?0)?{
????????????fprintf(stderr,?"error:?write:?%s\n",?strerror(errno));
????????????celt_decoder_destroy(state);
????????????celt_mode_destroy(mode);
????????????return?1;
????????}
????}
?
????celt_decoder_destroy(state);
????celt_mode_destroy(mode);
?
????return?0;
}

編碼: #include?<stdio.h>
#include?<stdlib.h>
#include?<stdint.h>
#include?<string.h>
#include?<unistd.h>
#include?<errno.h>
?
#include?"celt.h"
?
int
main(int?argc,?char?**argv)?{
????short?pcm[2048]?=?{?};
????char?data[2048]?=?{?};
????int?rate????????=?48000;
????int?framesize???=?960;
????int?channels????=?1;
????int?bitrate?????=?0;
????int?variable????=?0;
????int?prediction??=?2;
????int?complexity??=?10;
????int?tmp;
????int?rem;
????void?*mode;
????void?*state;
????uint16_t?len;
?
????while?((tmp?=?getopt(argc,?argv,?"r:f:c:b:vp:x:"))?!=?-1)?{
????????switch?(tmp)?{
??????????case?'r':
????????????rate?=?atoi(optarg);
????????????break;
??????????case?'f':
????????????framesize?=?atoi(optarg);
????????????break;
??????????case?'c':
????????????channels?=?atoi(optarg);
????????????break;
??????????case?'b':
????????????bitrate?=?atoi(optarg);
????????????break;
??????????case?'v':
????????????variable?=?1;
????????????break;
??????????case?'p':
????????????prediction?=?atoi(optarg);
????????????break;
??????????case?'x':
????????????complexity?=?atoi(optarg);
????????????break;
????????}
????}
????if?(!(mode?=?celt_mode_create(rate,?framesize,?&tmp)))?{
????????fprintf(stderr,?"error:?celt_mode_create:?%s\n",?celt_strerror(tmp));
????????return?1;
????}
????if?(!(state?=?celt_encoder_create_custom(mode,?channels,?&tmp)))?{
????????fprintf(stderr,?"error:?celt_encoder_create_custom:?%s\n",?celt_strerror(tmp));
????????celt_mode_destroy(mode);
????????return?1;
????}
????if?(bitrate?&&?celt_encoder_ctl(state,?CELT_SET_BITRATE(bitrate))?!=?CELT_OK)?{
????????fprintf(stderr,?"error:?celt_encoder_ctl:?CELT_SET_BITRATE:?bitrate?request?failed\n");
????????celt_encoder_destroy(state);
????????celt_mode_destroy(mode);
????????return?1;
????}
????if?(variable?&&?celt_encoder_ctl(state,?CELT_SET_VBR(variable))?!=?CELT_OK)?{
????????fprintf(stderr,?"error:?celt_encoder_ctl:?CELT_SET_VBR:?vbr?request?failed\n");
????????celt_encoder_destroy(state);
????????celt_mode_destroy(mode);
????????return?1;
????}
????if?(celt_encoder_ctl(state,?CELT_SET_PREDICTION(prediction))?!=?CELT_OK)?{
????????fprintf(stderr,?"error:?celt_encoder_ctl:?CELT_SET_PREDICTION:?prediction?request?failed\n");
????????celt_encoder_destroy(state);
????????celt_mode_destroy(mode);
????????return?1;
????}
????if?(celt_encoder_ctl(state,?CELT_SET_COMPLEXITY(complexity))?!=?CELT_OK)?{
????????fprintf(stderr,?"error:?celt_encoder_ctl:?CELT_SET_COMPLEXITY:?complexity?0?through?10?is?only?supported\n");
????????celt_encoder_destroy(state);
????????celt_mode_destroy(mode);
????????return?1;
????}
?
????for?(len?=?0;;)?{
????????if?(!len)?{
????????????len?=?sizeof(*pcm)?*?framesize?*?channels;
????????????if?(len?>?sizeof(pcm))?{
????????????????fprintf(stderr,?"error:?pcm?frame?larger?than?buffer\n");
????????????????celt_encoder_destroy(state);
????????????????celt_mode_destroy(mode);
????????????????return?1;
????????????}
????????????rem?=?len;
????????}
????????if?((tmp?=?read(STDIN_FILENO,?(void?*)pcm?+?(len?-?rem),?rem))?<?0)?{
????????????fprintf(stderr,?"error:?read:?%s\n",?strerror(errno));
????????????celt_encoder_destroy(state);
????????????celt_mode_destroy(mode);
????????????return?1;
????????}
????????if?(!tmp)?{
????????????break;
????????}
????????if?(tmp?!=?rem)?{
????????????rem?-=?tmp;
????????????continue;
????????}
????????if?((tmp?=?celt_encode(state,?pcm,?framesize,?(void?*)data,?sizeof(data)))?<?0)?{
????????????fprintf(stderr,?"error:?celt_encode:?%s\n",?celt_strerror(tmp));
????????????celt_encoder_destroy(state);
????????????celt_mode_destroy(mode);
????????????return?1;
????????}
????????len?=?tmp;
????????if?(write(STDOUT_FILENO,?&len,?sizeof(len))?<?0?||?write(STDOUT_FILENO,?data,?len)?<?0)?{
????????????fprintf(stderr,?"error:?write:?%s\n",?strerror(errno));
????????????celt_encoder_destroy(state);
????????????celt_mode_destroy(mode);
????????????return?1;
????????}
????????len?=?0;
????}
?
????celt_encoder_destroy(state);
????celt_mode_destroy(mode);
?
????return?0;
}

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