Create Subversion repository

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 204 insertions, 0 deletions

diff --git a/converter/ppm/ppmtompeg/headers/rate.h b/converter/ppm/ppmtompeg/headers/rate.h
new file mode 100644
index 00000000..df5ca1cc
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+++ b/converter/ppm/ppmtompeg/headers/rate.h
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+/*===========================================================================*
+ * rate.h								     *
+ *									     *
+ *	Procedures concerned with rate control
+ *									     *
+ * EXPORTED PROCEDURES:							     *
+ *  getRateMode()
+ *  setBitRate()
+ *  getBitRate()
+ *  setBufferSize()
+ *  getBufferSize()
+ *	initRateControl()
+ *	targetRateControl()
+ * 	updateRateControl()
+ *	MB_RateOut()
+ *									     *
+ *===========================================================================*/
+
+/* 	COPYRIGHT INFO HERE	*/
+
+#define VARIABLE_RATE 0
+#define FIXED_RATE 1
+
+
+/*==================*
+ * Exported VARIABLES *
+ *==================*/
+
+
+extern int rc_bitsThisMB;
+extern int rc_numBlocks;
+extern int rc_totalQuant;
+extern int rc_quantOverride;
+
+
+/*=====================*
+ * EXPORTED PROCEDURES *
+ *=====================*/
+
+/*===========================================================================*
+ *
+ * initRateControl
+ *
+ *	initialize the allocation parameters.
+ *===========================================================================*/
+int
+initRateControl(bool const wantUnderflowWarning,
+                bool const wantOverflowWarning);
+
+/*===========================================================================*
+ *
+ * targetRateControl
+ *
+ *      Determine the target allocation for given picture type.
+ *
+ * RETURNS:     target size in bits
+ *===========================================================================*/
+void
+targetRateControl(MpegFrame * const frameP);
+
+
+/*===========================================================================*
+ *
+ * MB_RateOut
+ *
+ *      Prints out sampling of MB rate control data.  Every "nth" block
+ *	stats are printed, with "n" controled by global RC_MB_SAMPLE_RATE
+ *
+ * RETURNS:     nothing
+ *===========================================================================*/
+extern void MB_RateOut _ANSI_ARGS_((int type));
+
+
+/*===========================================================================*
+ *
+ * updateRateControl
+ *
+ *      Update the statistics kept, after end of frame
+ *
+ * RETURNS:     nothing
+ *
+ * SIDE EFFECTS:   many global variables
+ *===========================================================================*/
+void
+updateRateControl(int const type);
+
+
+/*===========================================================================*
+ *
+ * needQScaleChange(current Q scale, 4 luminance blocks)
+ *
+ *
+ * RETURNS:     new Qscale
+ *===========================================================================*/
+extern int needQScaleChange _ANSI_ARGS_((int oldQScale,  Block blk0, Block blk1, Block blk2, Block blk3));
+
+/*===========================================================================*
+ *
+ * incNumBlocks()
+ *
+ *
+ * RETURNS:   nothing
+ *===========================================================================*/
+extern void incNumBlocks _ANSI_ARGS_((int num));
+
+
+/*===========================================================================*
+ *
+ * incMacroBlockBits()
+ *
+ *  Increments the number of Macro Block bits and the total of Frame
+ *  bits by the number passed.
+ *
+ * RETURNS:   nothing
+ *===========================================================================*/
+extern void incMacroBlockBits _ANSI_ARGS_((int num));
+
+
+/*===========================================================================*
+ *
+ * SetRateControl ()
+ *
+ *      Checks the string parsed from the parameter file.  Verifies
+ *  number and sets global values.
+ *
+ * RETURNS:     nothing
+ *===========================================================================*/
+extern void SetRateControl _ANSI_ARGS_((char *charPtr));
+
+
+/*===========================================================================*
+ *
+ * setBufferSize ()
+ *
+ *      Checks the string parsed from the parameter file.  Verifies
+ *  number and sets global values.
+ *
+ * RETURNS:     nothing
+ *===========================================================================*/
+extern void 
+setBufferSize(const char * const charPtr);
+
+
+/*===========================================================================*
+ *
+ * getBufferSize ()
+ *
+ *      returns the buffer size read from the parameter file.  Size is
+ *  in bits- not in units of 16k as written to the sequence header.
+ *
+ * RETURNS:     int (or -1 if invalid)
+ *===========================================================================*/
+extern int getBufferSize _ANSI_ARGS_((void));
+
+
+/*===========================================================================*
+ *
+ * setBitRate ()
+ *
+ *      Checks the string parsed from the parameter file.  Verifies
+ *  number and sets global values.
+ *
+ * RETURNS:     nothing
+ *
+ * SIDE EFFECTS:   global variables
+ *===========================================================================*/
+extern void 
+setBitRate(const char * const charPtr);
+
+
+/*===========================================================================*
+ *
+ * getBitRate ()
+ *
+ *      Returns the bit rate read from the parameter file.  This is the
+ *  real rate in bits per second, not in 400 bit units as is written to
+ *  the sequence header.
+ *
+ * RETURNS:     int (-1 if Variable mode operation)
+ *===========================================================================*/
+extern int getBitRate _ANSI_ARGS_((void));
+
+
+/*===========================================================================*
+ *
+ * getRateMode ()
+ *
+ *      Returns the rate mode- interpreted waa either Fixed or Variable
+ *
+ * RETURNS:     integer
+ *===========================================================================*/
+extern int getRateMode _ANSI_ARGS_((void));
+
+
+/*===========================================================================*
+ *
+ * incQuantOverride()
+ *
+ *  counter of override of quantization
+ *
+ * RETURNS:   nothing
+ *===========================================================================*/
+extern void incQuantOverride  _ANSI_ARGS_((int num));
+