New FLAC decoder from the ffmpeg project

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7656 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 46 insertions, 0 deletions

diff --git a/apps/codecs/libffmpegFLAC/decoder.h b/apps/codecs/libffmpegFLAC/decoder.h
new file mode 100644
index 0000000..5d503ad
--- /dev/null
+++ b/apps/codecs/libffmpegFLAC/decoder.h
@@ -0,0 +1,46 @@
+#ifndef _FLAC_DECODER_H
+#define _FLAC_DECODER_H
+ 
+#include "bitstream.h"
+
+#define MAX_CHANNELS 2       /* Maximum supported channels */
+#define MAX_BLOCKSIZE 4608   /* Maxsize in samples of one uncompressed frame */
+#define MAX_FRAMESIZE 32768  /* Maxsize in bytes of one compressed frame */
+
+#define FLAC_OUTPUT_DEPTH 28 /* Provide samples left-shifted to 28-bits */
+
+enum decorrelation_type {
+    INDEPENDENT,
+    LEFT_SIDE,
+    RIGHT_SIDE,
+    MID_SIDE,
+};
+
+typedef struct FLACContext {
+    GetBitContext gb;
+
+    int min_blocksize, max_blocksize;
+    int min_framesize, max_framesize;
+    int samplerate, channels;
+    int blocksize/*, last_blocksize*/;
+    int bps, curr_bps;
+    unsigned long samplenumber;
+    unsigned long totalsamples;
+    enum decorrelation_type decorrelation;
+
+    int filesize;
+    int length;
+    int bitrate;
+    int metadatalength;
+    
+    int bitstream_size;
+    int bitstream_index;
+} FLACContext;
+
+int flac_decode_frame(FLACContext *s,
+                      int32_t* decoded0,
+                      int32_t* decoded1,
+                      uint8_t *buf, int buf_size,
+                      void (*yield)(void));
+
+#endif