/**
* A wrapper method which reads packets.
* It only reads them from the internal pre-fetched buffer in AACDCommonInfo.
*/
static int aacd_ff_io_read_packet( void *opaque, uint8_t *buf, int buf_size)
{
AACD_TRACE( "io_read_packet() start" );
AACDFFmpegInfo *ff = (AACDFFmpegInfo*) opaque;
AACDCommonInfo *cinfo = ff->cinfo;
if (cinfo->bytesleft < buf_size)
{
// Let's cheat now:
AACDArrayInfo *ainfo = (AACDArrayInfo*) cinfo;
if (!aacda_read_buffer( ainfo ))
{
AACD_INFO( "io_read_packet() EOF detected" );
}
}
int len = buf_size < cinfo->bytesleft ? buf_size : cinfo->bytesleft;
if (!len)
{
AACD_WARN( "read_packet(): no bytes left, returning 0" );
return 0;
}
memcpy( buf, cinfo->buffer, len );
cinfo->buffer += len;
cinfo->bytesleft -= len;
ff->bytesconsumed += len;
AACD_TRACE( "io_read_packet() stop" );
return len;
}
/*
* Class: com_biophysics_radioplayer_ArrayDecoder
* Method: nativeStart
* Signature: (ILcom/biophysics/radioplayer/ArrayBufferReader;Lcom/biophysics/radioplayer/Decoder/Info;)I
*/
JNIEXPORT jint JNICALL Java_com_biophysics_radioplayer_ArrayDecoder_nativeStart
(JNIEnv *env, jobject thiz, jint decoder, jobject jreader, jobject aacInfo)
{
AACD_TRACE( "start() start" );
AACDDecoder *dec = aacda_decoder( decoder );
if (!dec)
{
AACD_ERROR( "start() decoder [%d] not supported", decoder );
return 0;
}
AACDArrayInfo *ainfo = aacda_start( env, dec, jreader, aacInfo );
if (!ainfo)
{
AACD_ERROR( "start() cannot initialize decoder - out-of-memory error ?" );
return 0;
}
ainfo->env = env;
AACD_TRACE( "start() calling read_buffer" );
unsigned char* buffer = aacda_read_buffer( ainfo );
unsigned long buffer_size = ainfo->cinfo.bytesleft;
AACD_TRACE( "start() got %d bytes from read_buffer", buffer_size );
int pos = ainfo->decoder->sync( buffer, buffer_size );
AACD_TRACE( "start() sync returned %d", pos );
if (pos < 0)
{
AACD_ERROR( "start() failed - ADTS sync word not found" );
aacda_stop( ainfo );
return 0;
}
buffer += pos;
buffer_size -= pos;
AACD_TRACE( "start() calling decoder->start()" );
long err = ainfo->decoder->start( &ainfo->cinfo, ainfo->ext, buffer, buffer_size );
if (err < 0)
{
AACD_ERROR( "start() failed err=%d", err );
aacda_stop( ainfo );
return 0;
}
// remember pointers for first decode round:
if (!ainfo->cinfo.input_ctrl)
{
ainfo->cinfo.buffer = buffer + err;
ainfo->cinfo.bytesleft = buffer_size - err;
}
AACD_DEBUG( "start() bytesleft=%d", ainfo->cinfo.bytesleft );
aacd_start_info2java( env, &ainfo->cinfo, aacInfo );
ainfo->env = NULL;
AACD_TRACE( "nativeStart() stop" );
return (jint) ainfo;
}
