add MD5 support
diff --git a/src/libFLAC/encoder.c b/src/libFLAC/encoder.c
index 08442a4..dccf796 100644
--- a/src/libFLAC/encoder.c
+++ b/src/libFLAC/encoder.c
@@ -26,6 +26,7 @@
#include "private/encoder_framing.h"
#include "private/fixed.h"
#include "private/lpc.h"
+#include "private/md5.h"
#ifdef min
#undef min
@@ -54,6 +55,7 @@
FLAC__StreamMetaData metadata;
unsigned current_sample_number;
unsigned current_frame_number;
+ struct MD5Context md5context;
FLAC__EncoderWriteStatus (*write_callback)(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
void (*metadata_callback)(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
void *client_data;
@@ -329,6 +331,8 @@
encoder->guts->metadata.data.encoding.channels = encoder->channels;
encoder->guts->metadata.data.encoding.bits_per_sample = encoder->bits_per_sample;
encoder->guts->metadata.data.encoding.total_samples = 0; /* we don't know this yet; have to fill it in later */
+ memset(encoder->guts->metadata.data.encoding.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
+ MD5Init(&encoder->guts->md5context);
if(!FLAC__add_metadata_block(&encoder->guts->metadata, &encoder->guts->frame))
return encoder->state = FLAC__ENCODER_FRAMING_ERROR;
@@ -354,6 +358,7 @@
encoder->blocksize = encoder->guts->current_sample_number;
encoder_process_frame_(encoder, true); /* true => is last frame */
}
+ MD5Final(encoder->guts->metadata.data.encoding.md5sum, &encoder->guts->md5context);
encoder->guts->metadata_callback(encoder, &encoder->guts->metadata, encoder->guts->client_data);
if(encoder->guts != 0) {
for(i = 0; i < encoder->channels; i++) {
@@ -489,6 +494,14 @@
assert(encoder->state == FLAC__ENCODER_OK);
/*
+ * Accumulate raw signal to the MD5 signature
+ */
+ if(!FLAC__MD5Accumulate(&encoder->guts->md5context, encoder->guts->integer_signal, encoder->channels, encoder->blocksize, (encoder->bits_per_sample+7) / 8)) {
+ encoder->state = FLAC__ENCODER_MEMORY_ALLOCATION_ERROR;
+ return false;
+ }
+
+ /*
* First do a normal encoding pass
*/
frame_header.blocksize = encoder->blocksize;