小弟用lame压缩mp3，不知道怎么做～～谁来帮帮忙

Happy0403 2011-07-20 06:04:42

两个大括号里的分别是Encode和Decode，因为源码很乱，所以我吧Record（）和Replay（）拿走了。
我录音的时候的设置是这样的：



#define CANNELS					1

#define SAMPLE_RATE				(44100/2)

#define BITS_PER_SAMPLE			16

wf.wFormatTag = WAVE_FORMAT_PCM; // PCM格式

wf.nChannels = CANNELS; // 单声道

wf.wBitsPerSample = BITS_PER_SAMPLE; // 16位的样本

wf.nSamplesPerSec = SAMPLE_RATE; // 44100/2的采样率

wf.nBlockAlign = wf.nChannels  * wf.wBitsPerSample / 8; // 这个不用设置了

wf.nAvgBytesPerSec = wf.nSamplesPerSec * wf.nBlockAlign; // 这个也是

int main ()

{

	Record ();



	/* let us encode it ! */

	{

		int Tick = GetTickCount ();

		lame_global_flags *gfp;

		gfp = lame_init ();



		lame_set_bWriteVbrTag(gfp, 0);



		lame_set_errorf(gfp,error_hander);

		lame_set_debugf(gfp,error_hander);

		lame_set_msgf(gfp,error_hander);





		lame_set_num_channels(gfp, CANNELS);

		lame_set_in_samplerate(gfp, SAMPLE_RATE);

		lame_set_brate(gfp, 128);

		lame_set_mode(gfp, MONO);

		lame_set_quality(gfp, 2);   /* 2=high  5 = medium  7=low */ 

		//lame_set_out_samplerate (gfp, SAMPLE_RATE);



		lame_init_params (gfp);



		int num_samples = DataSize/BITS_PER_SAMPLE*8/CANNELS;

		unsigned mp3buffer_size = (unsigned)(1.25 * num_samples + 7200);



		mp3Data = new unsigned char[mp3buffer_size];



		Mp3Size = 0;

		Mp3Size = lame_encode_buffer(gfp,

			(short *)wh.lpData, 0,

			num_samples, mp3Data, mp3buffer_size);



		Mp3Size += lame_encode_flush (gfp, mp3Data, mp3buffer_size);



		lame_mp3_tags_fid(gfp, 0);



		lame_close(gfp); 



		printf("lame spent : %u\n", GetTickCount () - Tick);

	}

	ZeroMemory (wh.lpData, DataSize);





	// let us decode it!

	hip_t hip = hip_decode_init ();





	mp3data_struct md;

	int DecodeSize;

	DecodeSize = hip_decode_headers (hip, mp3Data, Mp3Size, (short *)wh.lpData, 0, &md);



	hip_decode_exit (hip);



	printf ("mp3Data Size : %u, OrgSize : %u decodeSize: %u\t %0.2f%% \n", Mp3Size, DataSize, DecodeSize, Mp3Size*100.0/DataSize);



	Replay();



	printf ("press any key to exit;\n");

	getchar ();

}

程序能成功运行，出现两个错误提示：
hip: bitstream problem, resyncing skipping 255 bytes...
hip: bitstream problem, resyncing skipping 162 bytes...
可是，本来我录音是有1.5S的，回放却只有0.75S左右。。

我看LAME的API说明。。看不懂 - - ，它就提供一些代码，我Copy下来就这样了。
是哪里出错了呢？（加密的时候用不用选择样本位数呢？我找不到设置的函数）

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