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參照前兩篇文章編譯后，導(dǎo)入到工程，就可以使用了
具體四步：
1、opus_encoder_create創(chuàng)建
2、opus_encoder_ctl設(shè)置
3、opus_encode / opus_decode 編解碼
4、opus_encoder_destroy釋放
附上代碼
.h
- #import <Foundation/Foundation.h>
-
- @interface opusCodec : NSObject
- -(void)opusInit;
- -(NSData*)encodePCMData:(NSData*)data;
- -(NSData*)decodeOpusData:(NSData*)data;
- @end
.m
- #import "opusCodec.h"
- #import "opus.h"
-
- #define WB_FRAME_SIZE 160
-
- @implementation opusCodec
- {
- OpusEncoder *enc;
- OpusDecoder *dec;
- int opus_num;
- int pcm_num;
- unsigned char opus_data_encoder[40];
- }
-
- -(void)opusInit
- {
- int error;
- int Fs = 16000;//采樣率
- int channels = 1;
- int application = OPUS_APPLICATION_VOIP;
-
- opus_int32 bitrate_bps = kDefaultSampleRate;
- int bandwidth = OPUS_AUTO;//OPUS_BANDWIDTH_NARROWBAND 寬帶窄帶
- int use_vbr = 0;
- int cvbr = 1;
- int complexity = 4; //錄制質(zhì)量 1-10
- int packet_loss_perc = 0;
-
- enc = opus_encoder_create(Fs, channels, application, &error);
- dec = opus_decoder_create(Fs, channels, &error);
-
- opus_encoder_ctl(enc, OPUS_SET_BITRATE(bitrate_bps));
- opus_encoder_ctl(enc, OPUS_SET_BANDWIDTH(bandwidth));
- opus_encoder_ctl(enc, OPUS_SET_VBR(use_vbr));
- opus_encoder_ctl(enc, OPUS_SET_VBR_CONSTRAINT(cvbr));
- opus_encoder_ctl(enc, OPUS_SET_COMPLEXITY(complexity));
- opus_encoder_ctl(enc, OPUS_SET_PACKET_LOSS_PERC(packet_loss_perc));
- opus_encoder_ctl(enc, OPUS_SET_SIGNAL(OPUS_SIGNAL_VOICE));//信號(hào)
- }
-
- - (NSData *)encode:(shortshort *)pcmBuffer length:(int)lengthOfShorts
- {
- NSMutableData *decodedData = [NSMutableData data];
- int frame_size = WB_FRAME_SIZE;
- short input_frame[frame_size];
- opus_int32 max_data_bytes = 2500;
-
- memcpy(input_frame, pcmBuffer, frame_size * sizeof(short));
- int encodeBack = opus_encode(enc, input_frame, frame_size, opus_data_encoder, max_data_bytes);
- NSLog(@"encodeBack===%d",encodeBack);
- if (encodeBack > 0)
- {
- [decodedData appendBytes:opus_data_encoder length:encodeBack];
- }
-
- return decodedData;
- }
-
- //int decode(unsigned char* in_data, int len, short* out_data, int* out_len) {
- -(int)decode:(unsigned charchar *)encodedBytes length:(int)lengthOfBytes output:(short*)decoded {
- int frame_size = WB_FRAME_SIZE;
- char cbits[frame_size + 1];
- memcpy(cbits, encodedBytes, lengthOfBytes);
- pcm_num = opus_decode(dec,
- cbits,
- lengthOfBytes,
- decoded,
- frame_size,
- 0);
-
- return frame_size;
-
-
- }
- -(NSData*)encodePCMData:(NSData*)data
- {
-
-
- return [self encode:(shortshort *)[data bytes] length:[data length]/sizeof(short)];
- }
-
- -(NSData*)decodeOpusData:(NSData*)data
- {
- NSInteger len = [data length];
- NSLog(@"數(shù)據(jù)長(zhǎng)度===%d",len);
-
- Byte *byteData = (Byte*)malloc(len);
-
- memcpy(byteData, [data bytes], len);
-
- short decodedBuffer[1024];
-
- int nDecodedByte = sizeof(short) * [self decode:byteData length:len output:decodedBuffer];
- NSLog(@"返回的長(zhǎng)度＝＝%d",nDecodedByte);
- NSData* PCMData = [NSData dataWithBytes:(Byte *)decodedBuffer length:nDecodedByte];
- return PCMData;
- }
-
-
- @end
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