Example #1
0
JNIEXPORT jint JNICALL Java_com_realtek_cast_util_Alac_decodeByteFrame(JNIEnv *env, jclass clazz, jbyteArray in, jint size, jbyteArray out) {
	static jbyte bufIn[1024*16];
	static jbyte bufOut[1024*16];

	env->GetByteArrayRegion(in, 0, size, bufIn);

	int outputsize = 0;
	alac_decode_frame(s_alac, (unsigned char*)bufIn, bufOut, &outputsize);
	if (outputsize >= 0) {
		env->SetByteArrayRegion(out, 0, outputsize, bufOut);
	}

	return outputsize;
}
Example #2
0
static void alac_decode(short *dest, uint8_t *buf, int len) {
  unsigned char packet[MAX_PACKET];
  unsigned char packetp[MAX_PACKET];
  assert(len <= MAX_PACKET);
  int outsize;

  if (encrypted) {
    unsigned char iv[16];
    int aeslen = len & ~0xf;
    memcpy(iv, aesiv, sizeof(iv));
#ifdef HAVE_LIBPOLARSSL
    aes_crypt_cbc(&dctx, AES_DECRYPT, aeslen, iv, buf, packet);
#endif
#ifdef HAVE_LIBSSL
    AES_cbc_encrypt(buf, packet, aeslen, &aes, iv, AES_DECRYPT);
#endif
    memcpy(packet + aeslen, buf + aeslen, len - aeslen);
    alac_decode_frame(decoder_info, packet, dest, &outsize);
  } else {
    alac_decode_frame(decoder_info, buf, dest, &outsize);
  }

  assert(outsize == FRAME_BYTES(frame_size));
}
Example #3
0
static void alac_decode(short *dest, uint8_t *buf, int len) {
    unsigned char packet[MAX_PACKET];
    assert(len<=MAX_PACKET);

    unsigned char iv[16];
    int aeslen = len & ~0xf;
    memcpy(iv, aesiv, sizeof(iv));
    AES_cbc_encrypt(buf, packet, aeslen, &aes, iv, AES_DECRYPT);
    memcpy(packet+aeslen, buf+aeslen, len-aeslen);

    int outsize;

    alac_decode_frame(decoder_info, packet, dest, &outsize);

    assert(outsize == FRAME_BYTES(frame_size));
}
Example #4
0
JNIEXPORT jint JNICALL Java_com_realtek_cast_util_Alac_decodeFrame(JNIEnv *env, jclass clazz, jbyteArray in, jint size, jintArray out) {
	static jbyte bufIn[1024*16];
	static jint bufOut[1024*16];
	static jint tmp[1024*16];

	env->GetByteArrayRegion(in, 0, size, bufIn);

	int outputsize = 0;
	alac_decode_frame(s_alac, (unsigned char*)bufIn, bufOut, &outputsize);

//	int value;
	int16_t *tmpout = (int16_t*) bufOut;
	for (int i = 0; i < outputsize/2; i++){
		tmp[i] = (int16_t) tmpout[i];
	}
	env->SetIntArrayRegion(out, 0, outputsize/2, tmp);

	return outputsize;
}
Example #5
0
File: alac.c Project: ifroz/rockbox
/* this is called for each file to process */
enum codec_status codec_run(void)
{
    size_t n;
    demux_res_t demux_res;
    stream_t input_stream;
    uint32_t samplesdone;
    uint32_t elapsedtime = 0;
    int samplesdecoded;
    unsigned int i;
    unsigned char* buffer;
    alac_file alac;
    intptr_t param;

    /* Clean and initialize decoder structures */
    memset(&demux_res , 0, sizeof(demux_res));
    if (codec_init()) {
        LOGF("ALAC: Error initialising codec\n");
        return CODEC_ERROR;
    }

    ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency);
    codec_set_replaygain(ci->id3);

    ci->seek_buffer(0);

    stream_create(&input_stream,ci);

    /* Read from ci->id3->offset before calling qtmovie_read. */
    samplesdone = (uint32_t)(((uint64_t)(ci->id3->offset) * ci->id3->frequency) /  
                  (ci->id3->bitrate*128));
  
    /* if qtmovie_read returns successfully, the stream is up to
     * the movie data, which can be used directly by the decoder */
    if (!qtmovie_read(&input_stream, &demux_res)) {
        LOGF("ALAC: Error initialising file\n");
        return CODEC_ERROR;
    }

    /* initialise the sound converter */
    alac_set_info(&alac, demux_res.codecdata);
  
    /* Set i for first frame, seek to desired sample position for resuming. */
    i=0;
    if (samplesdone > 0) {
        if (m4a_seek(&demux_res, &input_stream, samplesdone,
                      &samplesdone, (int*) &i)) {
            elapsedtime = (samplesdone * 10) / (ci->id3->frequency / 100);
            ci->set_elapsed(elapsedtime);
        } else {
            samplesdone = 0;
        }
    }

    ci->set_elapsed(elapsedtime);

    /* The main decoding loop */
    while (i < demux_res.num_sample_byte_sizes) {
        enum codec_command_action action = ci->get_command(&param);

        if (action == CODEC_ACTION_HALT)
            break;

        /* Request the required number of bytes from the input buffer */
        buffer=ci->request_buffer(&n, ALAC_BYTE_BUFFER_SIZE);

        /* Deal with any pending seek requests */
        if (action == CODEC_ACTION_SEEK_TIME) {
            if (m4a_seek(&demux_res, &input_stream,
                         (param/10) * (ci->id3->frequency/100),
                         &samplesdone, (int *)&i)) {
                elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
            }
            ci->set_elapsed(elapsedtime);
            ci->seek_complete();
        }

        /* Request the required number of bytes from the input buffer */
        buffer=ci->request_buffer(&n, ALAC_BYTE_BUFFER_SIZE);

        /* Decode one block - returned samples will be host-endian */
        samplesdecoded=alac_decode_frame(&alac, buffer, outputbuffer, ci->yield);
        ci->yield();

        /* Advance codec buffer by amount of consumed bytes */
        ci->advance_buffer(alac.bytes_consumed);

        /* Output the audio */
        ci->pcmbuf_insert(outputbuffer[0], outputbuffer[1], samplesdecoded);

        /* Update the elapsed-time indicator */
        samplesdone+=samplesdecoded;
        elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
        ci->set_elapsed(elapsedtime);

        i++;
    }

    LOGF("ALAC: Decoded %lu samples\n",(unsigned long)samplesdone);
    return CODEC_OK;
}
Example #6
0
/* this is the codec entry point */
enum codec_status codec_main(void)
{
    size_t n;
    demux_res_t demux_res;
    stream_t input_stream;
    uint32_t samplesdone;
    uint32_t elapsedtime;
    uint32_t sample_duration;
    uint32_t sample_byte_size;
    int samplesdecoded;
    unsigned int i;
    unsigned char* buffer;
    alac_file alac;
    int retval;

    /* Generic codec initialisation */
    ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED);
    ci->configure(DSP_SET_SAMPLE_DEPTH, ALAC_OUTPUT_DEPTH-1);

next_track:

    if (codec_init()) {
        LOGF("ALAC: Error initialising codec\n");
        retval = CODEC_ERROR;
        goto exit;
    }

    while (!*ci->taginfo_ready && !ci->stop_codec)
        ci->sleep(1);

    ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
    codec_set_replaygain(ci->id3);

    stream_create(&input_stream,ci);

    /* Read from ci->id3->offset before calling qtmovie_read. */
    samplesdone = (uint32_t)(((uint64_t)(ci->id3->offset) * ci->id3->frequency) /
                             (ci->id3->bitrate*128));

    /* if qtmovie_read returns successfully, the stream is up to
     * the movie data, which can be used directly by the decoder */
    if (!qtmovie_read(&input_stream, &demux_res)) {
        LOGF("ALAC: Error initialising file\n");
        retval = CODEC_ERROR;
        goto done;
    }

    /* initialise the sound converter */
    create_alac(demux_res.sound_sample_size, demux_res.num_channels,&alac);
    alac_set_info(&alac, demux_res.codecdata);

    /* Set i for first frame, seek to desired sample position for resuming. */
    i=0;
    if (samplesdone > 0) {
        if (alac_seek(&demux_res, &input_stream, samplesdone,
                      &samplesdone, (int*) &i)) {
            elapsedtime = (samplesdone * 10) / (ci->id3->frequency / 100);
            ci->set_elapsed(elapsedtime);
        } else {
            samplesdone = 0;
        }
    }

    /* The main decoding loop */
    while (i < demux_res.num_sample_byte_sizes) {
        ci->yield();
        if (ci->stop_codec || ci->new_track) {
            break;
        }

        /* Deal with any pending seek requests */
        if (ci->seek_time) {
            if (alac_seek(&demux_res, &input_stream,
                          ((ci->seek_time-1)/10) * (ci->id3->frequency/100),
                          &samplesdone, (int *)&i)) {
                elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
                ci->set_elapsed(elapsedtime);
            }
            ci->seek_complete();
        }

        /* Lookup the length (in samples and bytes) of block i */
        if (!get_sample_info(&demux_res, i, &sample_duration,
                             &sample_byte_size)) {
            LOGF("ALAC: Error in get_sample_info\n");
            retval = CODEC_ERROR;
            goto done;
        }

        /* Request the required number of bytes from the input buffer */

        buffer=ci->request_buffer(&n,sample_byte_size);
        if (n!=sample_byte_size) {
            retval = CODEC_ERROR;
            goto done;
        }

        /* Decode one block - returned samples will be host-endian */
        ci->yield();
        samplesdecoded=alac_decode_frame(&alac, buffer, outputbuffer, ci->yield);

        /* Advance codec buffer n bytes */
        ci->advance_buffer(n);

        /* Output the audio */
        ci->yield();
        ci->pcmbuf_insert(outputbuffer[0], outputbuffer[1], samplesdecoded);

        /* Update the elapsed-time indicator */
        samplesdone+=sample_duration;
        elapsedtime=(samplesdone*10)/(ci->id3->frequency/100);
        ci->set_elapsed(elapsedtime);

        i++;
    }
    retval = CODEC_OK;

done:
    LOGF("ALAC: Decoded %ld samples\n",samplesdone);

    if (ci->request_next_track())
        goto next_track;

exit:
    return retval;
}