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POconvert .mp3 from wav using Lame library in android
 

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    <p>I got a hard problem when using Lame and I need your help. I am using LAME (version 3.9.9.5) my devices for debug is samsung galaxy s2 (OS android 4.0). I record and get 3ga file and rename to .wav file after that using LAME to config to mp3 file. I got mp3 file but when I play it not correct file (just zet zet) and shoter than original wav file. This is my mp3ConvertFIle: `public static final int NUM_CHANNELS = 2; // public static final int SAMPLE_RATE = 16000; public static final int SAMPLE_RATE = 48000; public static final int BITRATE = 128; public static final int MODE = 1; public static final int QUALITY = 2; static { System.loadLibrary("mp3lame"); }</p> <pre><code>private native void initEncoder(int numChannels, int sampleRate, int bitRate, int mode, int quality); private native void destroyEncoder(); private native int encodeFile(String sourcePath, String targetPath); private native int wavToMp3(String src, String dest, String quality, String bitrate); /** * Convert a WAV file to MP3 * * @param src * path to WAV file * @param dest * path to MP3 file */ public void convert(String src, String dest) { initEncoder(NUM_CHANNELS, SAMPLE_RATE, BITRATE, MODE, QUALITY); encodeFile(src, dest); }` </code></pre> <p>and this is my wrapper.c file:</p> <pre><code>#include "stdio.h" #include "stdlib.h" #include "jni.h" #include "android/log.h" #include "libmp3lame/lame.h" #define BUFFER_SIZE 8192 #define be_short(s) ((short) ((unsigned short) (s) &lt;&lt; 8) | ((unsigned short) (s) &gt;&gt; 8)) #define LOG_TAG "LAME ENCODER" #define LOGD(format, args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, format, ##args); lame_t lame; int read_samples(FILE *input_file, short *input) { int nb_read; nb_read = fread(input, 1, sizeof(short), input_file) / sizeof(short); int i = 0; while (i &lt; nb_read) { input[i] = be_short(input[i]); i++; } return nb_read; } void Java_com_dao_smsring_utility_MP3Converter_initEncoder(JNIEnv *env, jobject jobj, jint in_num_channels, jint in_samplerate, jint in_brate, jint in_mode, jint in_quality) { lame = lame_init(); lame_set_num_channels(lame, in_num_channels); lame_set_in_samplerate(lame, in_samplerate); lame_set_out_samplerate(lame, 48000); lame_set_brate(lame, in_brate); lame_set_mode(lame, in_mode); lame_set_quality(lame, in_quality); int res = lame_init_params(lame); LOGD("version of %s is",get_lame_version()); } void Java_com_dao_smsring_utility_MP3Converter_destroyEncoder( JNIEnv *env, jobject jobj) { int res = lame_close(lame); } void Java_com_dao_smsring_utility_MP3Converter_encodeFile(JNIEnv *env, jobject jobj, jstring in_source_path, jstring in_target_path) { const char *source_path, *target_path; source_path = (*env)-&gt;GetStringUTFChars(env, in_source_path, NULL); target_path = (*env)-&gt;GetStringUTFChars(env, in_target_path, NULL); FILE *input_file, *output_file; input_file = fopen(source_path, "rb"); output_file = fopen(target_path, "wb"); short input[BUFFER_SIZE]; char output[BUFFER_SIZE]; int nb_read = 0; int nb_write = 0; int nb_total = 0; while (nb_read = read_samples(input_file, input)) { nb_write = lame_encode_buffer(lame, input, input, nb_read, output, BUFFER_SIZE); fwrite(output, nb_write, 1, output_file); nb_total += nb_write; } LOGD(" total read %d is",nb_total); nb_write = lame_encode_flush(lame, output, BUFFER_SIZE); // fwrite(output, nb_write, 1, output_file); LOGD(" total write %d is",nb_write); lame_mp3_tags_fid(lame,output_file); lame_close(lame); fclose(input_file); fclose(output_file); } </code></pre> <p>I don't know why? Help me please. Thanks you very much. My gmail: gunblackcatxiii@gmail.com Hoping to get your support</p>
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