First Rockbox version of ALAC decoder - porting to work in Rockbox environment and some simple (but significant) optimisations

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7544 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 26 insertions, 4 deletions

diff --git a/apps/codecs/libalac/decomp.h b/apps/codecs/libalac/decomp.h
index 23dbc52779..e6fa82d3d7 100644
--- a/apps/codecs/libalac/decomp.h
+++ b/apps/codecs/libalac/decomp.h
@@ -1,12 +1,34 @@
 #ifndef __ALAC__DECOMP_H
 #define __ALAC__DECOMP_H
 
-typedef struct alac_file alac_file;
+typedef struct
+{
+    unsigned char *input_buffer;
+    int input_buffer_bitaccumulator; /* used so we can do arbitary
+                                        bit reads */
+    int samplesize;
+    int numchannels;
+    int bytespersample;
 
-alac_file *create_alac(int samplesize, int numchannels);
-void decode_frame(alac_file *alac,
+    /* stuff from setinfo */
+    uint32_t setinfo_max_samples_per_frame; /* 0x1000 = 4096 */    /* max samples per frame? */
+    uint8_t setinfo_7a; /* 0x00 */
+    uint8_t setinfo_sample_size; /* 0x10 */
+    uint8_t setinfo_rice_historymult; /* 0x28 */
+    uint8_t setinfo_rice_initialhistory; /* 0x0a */
+    uint8_t setinfo_rice_kmodifier; /* 0x0e */
+    uint8_t setinfo_7f; /* 0x02 */
+    uint16_t setinfo_80; /* 0x00ff */
+    uint32_t setinfo_82; /* 0x000020e7 */
+    uint32_t setinfo_86; /* 0x00069fe4 */
+    uint32_t setinfo_8a_rate; /* 0x0000ac44 */
+    /* end setinfo stuff */
+} alac_file;
+
+void create_alac(int samplesize, int numchannels, alac_file* alac);
+int16_t* decode_frame(alac_file *alac,
                   unsigned char *inbuffer,
-                  void *outbuffer, int *outputsize);
+                  int *outputsize);
 void alac_set_info(alac_file *alac, char *inputbuffer);
 
 #endif /* __ALAC__DECOMP_H */