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POspeex support in android
 

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    <p>Can anybody help me on <strong>how to use speex or jspeex in android?</strong></p> <p>I have searched a lot but could not able to find anywhere.There are many issues regarding this in <a href="http://code.google.com/p/android/issues/detail?can=4&amp;q=&amp;colspec=I&amp;groupby=&amp;sort=&amp;id=354#makechanges" rel="nofollow noreferrer">code.google.com/android</a> but none have answered it. Here also this question did not got a good response as my another question regarding this is <a href="https://stackoverflow.com/questions/9029977/decoding-speex-encoded-byte-array-in-android-jniwrapper-for-speex-decodingsp">Decoding speex encoded byte array in Android</a>. So If you know something about this then Please provide me information regarding this.</p> <p>I need to encode and decode bytearray of audio file using this codec.</p> <p>I have tried <a href="http://andrewbrobinson.com/2011/11/28/a-jni-wrapper-for-speex-on-android/comment-page-1/#comment-1352" rel="nofollow noreferrer">Android-ndk and got encoding done,</a> but getting a <strong>problem in decoding the byte array.</strong> Is there any other alternative to achieve this?</p> <p><strong>EDIT</strong></p> <p>my encoding Functions in native c file are as follow:</p> <pre><code>#include &lt;jni.h&gt; #include "speex/speex.h" #define FRAME_SIZE 320 int nbBytes; /*Holds the state of the encoder*/ void *state; void *decod_state; /*Holds bits so they can be read and written to by the Speex routines*/ SpeexBits decod_bits; SpeexBits bits; int i, tmp; void Java_com_mycom_speex_SpeexEncodingActivity_init(JNIEnv * env, jobject jobj) { /*Create a new encoder state in narrowband mode*/ state = speex_encoder_init(&amp;speex_wb_mode); /*Set the quality to 8*/ tmp=8; speex_encoder_ctl(state, SPEEX_SET_QUALITY, &amp;tmp); /*Initialization of the structure that holds the bits*/ speex_bits_init(&amp;bits); } jbyteArray Java_com_mycom_speex_SpeexEncodingActivity_encode(JNIEnv * env, jobject jobj, jshortArray inputData) { jbyteArray ret; jshort * inputArrayElements = (*env)-&gt;GetShortArrayElements(env, inputData, 0); /*Flush all the bits in the struct so we can encode a new frame*/ speex_bits_reset(&amp;bits); /*Encode the frame*/ speex_encode_int(state, inputArrayElements, &amp;bits); /*Copy the bits to an array of char that can be written*/ nbBytes = speex_bits_nbytes(&amp;bits); ret = (jbyteArray) ((*env)-&gt;NewByteArray(env, nbBytes)); jbyte * arrayElements = (*env)-&gt;GetByteArrayElements(env, ret, 0); speex_bits_write(&amp;bits, arrayElements, nbBytes); (*env)-&gt;ReleaseShortArrayElements(env, inputData, inputArrayElements, JNI_ABORT); (*env)-&gt;ReleaseByteArrayElements(env, ret, arrayElements, 0); return ret; } </code></pre> <p>now for decoding i am sending the converted short array to <strong>decode function as follow:</strong></p> <pre><code>void Java_com_mycom_speex_SpeexEncodingActivity_initDecode(JNIEnv * env, jobject jobj) { decod_state = speex_decoder_init(&amp;speex_wb_mode); tmp = 1; speex_decoder_ctl(decod_state, SPEEX_SET_ENH, &amp;tmp); /*Initialization of the structure that holds the bits*/ speex_bits_init(&amp;decod_bits); } jshortArray Java_com_mycom_speex_SpeexEncodingActivity_decode(JNIEnv * env, jobject jobj, jshortArray inputData) { jshort * inputArrayElements = (*env)-&gt;GetShortArrayElements(env, inputData, 0); /*Flush all the bits in the struct so we can decode a new frame*/ speex_bits_reset(&amp;decod_bits); /*Copy the bits to an array of char that can be written*/ nbBytes = speex_bits_nbytes(&amp;decod_bits); speex_bits_read_from(&amp;decod_bits,inputArrayElements, nbBytes); // here it requires char * in second argument /*Decode the frame*/ speex_decode_int(decod_state, &amp;decod_bits, inputArrayElements); (*env)-&gt;ReleaseShortArrayElements(env, encodedData, inputArrayElements, JNI_ABORT); return inputArrayElements; } </code></pre> <p>my Encoding functions are working fine the example is provided on the blog <a href="http://andrewbrobinson.com/2011/11/28/a-jni-wrapper-for-speex-on-android/comment-page-1/#comment-1352" rel="nofollow noreferrer">A JNI Wrapper for Speex on Android</a></p> <p><strong>Another attempt to decoding by passing char array and returning short array is as follow:</strong></p> <pre><code>jshortArray Java_com_mycom_speex_SpeexEncodingActivity_decode(JNIEnv * env, jobject jobj, jcharArray inputCharData) { jshortArray ret; jchar * inputArrayElements = (*env)-&gt;GetCharArrayElements(env, inputCharData, 0); /*Flush all the bits in the struct so we can decode a new frame*/ speex_bits_reset(&amp;decod_bits); /*Copy the bits to an array of char that can be written*/ nbBytes = speex_bits_nbytes(&amp;decod_bits); ret = (jshortArray)((*env)-&gt;NewShortArray(env, nbBytes)); jshort * arrayElements = (*env)-&gt;GetShortArrayElements(env, ret, 0); speex_bits_read_from(&amp;decod_bits,(char *) inputArrayElements, nbBytes); /*Decode the frame*/ speex_decode_int(decod_state, &amp;decod_bits, arrayElements); (*env)-&gt;ReleaseCharArrayElements(env, inputCharData, inputArrayElements, JNI_ABORT); (*env)-&gt;ReleaseShortArrayElements(env, ret, arrayElements, 0); return ret; } </code></pre> <p>the result is </p> <pre><code>Returned empty array of short if i return ret and if i return arrayElements it gives an error Fatal signal 11 (SIGSEGV) at 0x00000018 (code=1) </code></pre>
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    3. CO@nos i have added code of native code. please look at this.
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