* Decode Simple/Main Profiles sequence header * @see Figure 7-8, p16-17 * @param avctx Codec context * @param gb GetBit context initialized from Co

Do motion compensation over 1 macroblock * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c */

Get predicted DC value * prediction dir: left=0, top=1 * @param s MpegEncContext * @param overlap flag indicating that overlap filtering is used *

Put block onto picture */

/ VOP Dquant decoding * @param v VC-1 Context */

* called when all pixels up to row y are complete */

* Writes streaminfo metadata block to byte array */

* Calculate number of bytes written * @param s LZW encode state * @return Number of bytes written */

XOR four bytes into one. */

Computes the number of samples left to decode for the current frame and * sets these samples to zero. */

* Works out Dirac-compatible chroma format. */

* Returns the video format preset matching the input video dimensions and * time base. */

* Returns FFmpeg chroma format. */

* returns FFmpeg chroma format */

these functions do (a*C)>>16 things are tricky because a is signed, but C unsigned. M15 is used if C fits in 15 bit unsigned (C6,C7) M16 is used if C

generic function called after a macroblock has been parsed by the decoder or after it has been encoded by the encoder. Important variables used

* sets the given MpegEncContext to defaults for encoding. * the changed fields will not depend upon the prior state of the MpegEncContext. */

* motion compensation of a single macroblock * @param s context * @param dest_y luma destination pointer * @param dest_cb chroma cb/u destination p

* motion compensation of a single macroblock * @param s context * @param dest_y luma destination pointer * @param dest_cb chroma cb/u destination p

* Works out Schro-compatible chroma format. */

* Decode the transform coefficients for a particular channel * reference: Section 7.3 Quantization and Decoding of Mantissas */

* Parse the 'sync info' and 'bit stream info' from the AC-3 bitstream. * GetBitContext within AC3DecodeContext must point to * the start of the sync

* Initialize tables at runtime. */

* Upmix delay samples from stereo to original channel layout. */

* Floating point version of ff_acelp_decode_gain_code(). */

* Floating point version of ff_acelp_lp_decode(). */

* @defgroup postfilter Postfilter functions * Postfilter functions (gain control, wiener denoise filter, DC filter, * kalman smoothening, plus surro

* Add block to LZW code table * @param s LZW state * @param c Last character in block * @param hash_prefix LZW code for prefix * @param hash_code

* add an audio output stream */

return the stream number in the feed */

add a codec and set the default parameters */

add block[] to dest[] */

* Sum to data a periodic peak of a given period, width and shape. * * @param period the period of the peak divised by 400.0 */