Musepack seek hotfix. Do not dynamically allocate seek buffer but use a buffer of constant size (~28.5min). Files larger than this will still not seek properly. Some additional rework has to be done for the seek buffer.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17584 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 6 insertions, 14 deletions

diff --git a/apps/codecs/libmusepack/decoder.h b/apps/codecs/libmusepack/decoder.h
index 1f78d53c8d..b035ae9574 100644
--- a/apps/codecs/libmusepack/decoder.h
+++ b/apps/codecs/libmusepack/decoder.h
@@ -48,7 +48,8 @@
 
 enum {
     MPC_V_MEM = 2304,
-    MPC_DECODER_MEMSIZE = 16384,  // overall buffer size
+    MPC_DECODER_MEMSIZE = 16384,  // overall buffer size (words)
+    MPC_SEEK_BUFFER_SIZE = 65536, // seek buffer size (words)
 };
 
 typedef struct {
diff --git a/apps/codecs/libmusepack/mpc_decoder.c b/apps/codecs/libmusepack/mpc_decoder.c
index f7687c5bad..fa3295357c 100644
--- a/apps/codecs/libmusepack/mpc_decoder.c
+++ b/apps/codecs/libmusepack/mpc_decoder.c
@@ -118,6 +118,7 @@ static mpc_uint32_t get_initial_fpos(mpc_decoder *d, mpc_uint32_t StreamVersion)
 static inline mpc_int32_t mpc_decoder_huffman_decode_fastest(mpc_decoder *d, const HuffmanTyp* Table, const mpc_uint8_t* tab, mpc_uint16_t unused_bits);
 static void mpc_move_next(mpc_decoder *d);
 
+mpc_uint32_t  Seekbuffer[MPC_SEEK_BUFFER_SIZE];
 mpc_uint32_t  Speicher[MPC_DECODER_MEMSIZE];
 MPC_SAMPLE_FORMAT Y_L[36][32] IBSS_ATTR_MPC_LARGE_IRAM;
 MPC_SAMPLE_FORMAT Y_R[36][32] IBSS_ATTR_MPC_LARGE_IRAM;
@@ -1458,6 +1459,7 @@ void mpc_decoder_setup(mpc_decoder *d, mpc_reader *r)
   LOOKUP ( mpc_table_HuffQ[1][7], 63, LUT7_1  );
   LOOKUP ( mpc_table_HuffDSCF,    16, LUTDSCF );
 
+  d->SeekTable = Seekbuffer;
   d->Speicher = Speicher;
   d->Y_L = Y_L;
   d->Y_R = Y_R;
@@ -1467,12 +1469,6 @@ void mpc_decoder_setup(mpc_decoder *d, mpc_reader *r)
   #endif
 }
 
-void mpc_decoder_destroy(mpc_decoder *d) 
-{
-    if (d->SeekTable != NULL)
-        free(d->SeekTable);
-}
-
 static void mpc_decoder_set_streaminfo(mpc_decoder *d, mpc_streaminfo *si)
 {
     mpc_uint32_t seekTableSize;
@@ -1490,11 +1486,9 @@ static void mpc_decoder_set_streaminfo(mpc_decoder *d, mpc_streaminfo *si)
 
     d->samples_to_skip = MPC_DECODER_SYNTH_DELAY;
 
-    if (d->SeekTable != NULL)
-        free(d->SeekTable);
+    memset(d->SeekTable, 0, sizeof(Seekbuffer));
 
-    seekTableSize = si->frames;
-    d->SeekTable = (mpc_uint32_t*) calloc( sizeof(mpc_uint32_t), seekTableSize);
+    seekTableSize = min(si->frames, MPC_SEEK_BUFFER_SIZE);
     d->SeekTable_Step = si->frames / seekTableSize;
     if (si->frames % seekTableSize)
         d->SeekTable_Step+=1;
diff --git a/apps/codecs/libmusepack/musepack.h b/apps/codecs/libmusepack/musepack.h
index 9bdebf8b04..b9aff48427 100644
--- a/apps/codecs/libmusepack/musepack.h
+++ b/apps/codecs/libmusepack/musepack.h
@@ -154,9 +154,6 @@ mpc_bool_t mpc_decoder_seek_sample(mpc_decoder *d, mpc_int64_t destsample);
 /// Seeks to specified position in seconds in the source stream.
 mpc_bool_t mpc_decoder_seek_seconds(mpc_decoder *d, double seconds);
 
-/// Cleans up the decoder (seektable)
-void mpc_decoder_destroy(mpc_decoder *d);
-
 #ifdef __cplusplus
 }
 #endif // __cplusplus