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https://bugs.gentoo.org/883393
https://gitlab.xiph.org/xiph/libfishsound/-/merge_requests/1

From 8eb391d772cb3c3dbfb68b2216e095af705b0229 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Stegh=C3=B6fer?= <martin@steghoefer.eu>
Date: Wed, 22 Oct 2014 22:03:15 +0200
Subject: [PATCH] Fix incompatible flac callback types.

Bug-Debian: https://bugs.debian.org/766394

Starting from libflac 1.1.3 the flac API uses "size_t" as parameter type for the number of bytes in all callback functions.
--- a/src/libfishsound/flac.c
+++ b/src/libfishsound/flac.c
@@ -56,6 +56,13 @@
 
 #define BITS_PER_SAMPLE 24
 
+#if defined(HAVE_FLAC_1_1_3)
+#  define flac_callback_bytes_type size_t
+#else
+#  define flac_callback_bytes_type unsigned int
+#endif
+
+
 typedef struct _FishSoundFlacInfo {
   FLAC__StreamDecoder *fsd;
   FLAC__StreamEncoder *fse;
@@ -106,7 +113,7 @@ fs_flac_command (FishSound * fsound, int command, void * data, int datasize)
 #if FS_DECODE
 static FLAC__StreamDecoderReadStatus
 fs_flac_read_callback(const FLAC__StreamDecoder *decoder,
-                      FLAC__byte buffer[], unsigned int *bytes,
+                      FLAC__byte buffer[], flac_callback_bytes_type *bytes,
                       void *client_data)
 {
   FishSound* fsound = (FishSound*)client_data;
@@ -121,7 +128,7 @@ fs_flac_read_callback(const FLAC__StreamDecoder *decoder,
   }
 
   memcpy(buffer, fi->buffer, fi->bufferlength);
-  *bytes = (unsigned int)fi->bufferlength;
+  *bytes = (flac_callback_bytes_type)fi->bufferlength;
   fi->bufferlength = 0;
   return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
 }
@@ -346,7 +353,7 @@ dec_err:
 #if FS_ENCODE
 static FLAC__StreamEncoderWriteStatus
 fs_flac_enc_write_callback(const FLAC__StreamEncoder *encoder,
-                           const FLAC__byte buffer[], unsigned bytes,
+                           const FLAC__byte buffer[], flac_callback_bytes_type bytes,
                            unsigned samples, unsigned current_frame,
                            void *client_data)
 {
@@ -354,7 +361,7 @@ fs_flac_enc_write_callback(const FLAC__StreamEncoder *encoder,
   FishSoundFlacInfo *fi = fsound->codec_data;
 
   debug_printf(1, "IN");
-  debug_printf(1, "bytes: %d, samples: %d", bytes, samples);
+  debug_printf(1, "bytes: %lld, samples: %d", (long long) bytes, samples);
 
   if (fsound->callback.encoded) {
     FishSoundEncoded encoded = (FishSoundEncoded) fsound->callback.encoded;
-- 
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