avcodec/jpeg2000dwt: assert that mod == 0 for encoding

[ffmpeg] / libavcodec / jpeg2000.h

diff --git a/libavcodec/jpeg2000.h b/libavcodec/jpeg2000.h
index acdba62a075c303b57224dd37055e6c393ffea27..1054fe6333b917bba0325ec363325476094f0221 100644 (file)
--- a/libavcodec/jpeg2000.h
+++ b/libavcodec/jpeg2000.h
@@ -58,6 +58,9 @@ enum Jpeg2000Markers {
     JPEG2000_EOC = 0xffd9, // end of codestream
 };
 
+#define JPEG2000_SOP_FIXED_BYTES 0xFF910004
+#define JPEG2000_SOP_BYTE_LENGTH 6
+
 enum Jpeg2000Quantsty { // quantization style
     JPEG2000_QSTY_NONE, // no quantization
     JPEG2000_QSTY_SI,   // scalar derived
@@ -71,6 +74,8 @@ enum Jpeg2000Quantsty { // quantization style
 #define JPEG2000_MAX_DECLEVELS 32
 #define JPEG2000_MAX_RESLEVELS (JPEG2000_MAX_DECLEVELS + 1)
 
+#define JPEG2000_MAX_PASSES 100
+
 // T1 flags
 // flags determining significance of neighbor coefficients
 #define JPEG2000_T1_SIG_N  0x0001
@@ -161,11 +166,15 @@ typedef struct Jpeg2000Cblk {
     uint8_t ninclpasses; // number coding of passes included in codestream
     uint8_t nonzerobits;
     uint16_t length;
-    uint16_t lengthinc;
+    uint16_t lengthinc[JPEG2000_MAX_PASSES];
+    uint8_t nb_lengthinc;
     uint8_t lblock;
     uint8_t zero;
     uint8_t data[8192];
-    Jpeg2000Pass passes[100];
+    int nb_terminations;
+    int nb_terminationsinc;
+    int data_start[JPEG2000_MAX_PASSES];
+    Jpeg2000Pass passes[JPEG2000_MAX_PASSES];
     uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
 } Jpeg2000Cblk; // code block
 
@@ -262,4 +271,21 @@ void ff_jpeg2000_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
 
 void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
 
+static inline int needs_termination(int style, int passno) {
+    if (style & JPEG2000_CBLK_BYPASS) {
+        int type = passno % 3;
+        passno /= 3;
+        if (type == 0 && passno > 2)
+            return 2;
+        if (type == 2 && passno > 2)
+            return 1;
+        if (style & JPEG2000_CBLK_TERMALL) {
+            return passno > 2 ? 2 : 1;
+        }
+    }
+    if (style & JPEG2000_CBLK_TERMALL)
+        return 1;
+    return 0;
+}
+
 #endif /* AVCODEC_JPEG2000_H */