Add codecs to librbcodec.

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libffmpegFLAC/shndec.h b/lib/rbcodec/codecs/libffmpegFLAC/shndec.h
new file mode 100644
index 0000000000..068f4faf28
--- /dev/null
+++ b/lib/rbcodec/codecs/libffmpegFLAC/shndec.h
@@ -0,0 +1,52 @@
+#include "bitstream.h"
+
+#define SHN_OUTPUT_DEPTH 29 /* 28 bits + sign */
+
+#define MAX_CHANNELS   2
+#define MAX_PRED_ORDER 16
+#define MAX_NWRAP      MAX_PRED_ORDER
+#define MAX_NMEAN      4
+
+/* NUM_DEC_LOOPS should be even number */
+#define NUM_DEC_LOOPS      26
+#define DEFAULT_BLOCK_SIZE 256
+#define MAX_HEADER_SIZE    DEFAULT_BLOCK_SIZE*4
+#define MAX_BUFFER_SIZE    2*DEFAULT_BLOCK_SIZE*NUM_DEC_LOOPS
+#define MAX_DECODE_SIZE    ((DEFAULT_BLOCK_SIZE*NUM_DEC_LOOPS/2) + MAX_NWRAP)
+#define MAX_OFFSET_SIZE    MAX_NMEAN
+
+#define FN_DIFF0     0
+#define FN_DIFF1     1
+#define FN_DIFF2     2
+#define FN_DIFF3     3
+#define FN_QUIT      4
+#define FN_BLOCKSIZE 5
+#define FN_BITSHIFT  6
+#define FN_QLPC      7
+#define FN_ZERO      8
+#define FN_VERBATIM  9
+#define FN_ERROR     10
+
+typedef struct ShortenContext {
+    GetBitContext gb;
+    int32_t lpcqoffset;
+    uint32_t totalsamples;
+    int header_bits;
+    int channels;
+    int sample_rate;
+    int bits_per_sample;
+    int version;
+    int bitshift;
+    int last_bitshift;
+    int nmean;
+    int nwrap;
+    int blocksize;
+    int bitindex;
+} ShortenContext;
+
+int shorten_init(ShortenContext* s, uint8_t *buf, int buf_size);
+int shorten_decode_frames(ShortenContext *s, int *nsamples,
+                         int32_t *decoded0, int32_t *decoded1,
+                         int32_t *offset0, int32_t *offset1,
+                         uint8_t *buf, int buf_size,
+                         void (*yield)(void)) ICODE_ATTR;