lavc: reorder AVCodecContext fields.

Put related fields together, move the important ones closer to the
beginning, try to eliminate holes.

2 files changed, 801 insertions, 800 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index c7cea4e2e3..cd86856d32 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1177,6 +1177,63 @@ typedef struct AVCodecContext {
      * - set by avcodec_alloc_context3
      */
     const AVClass *av_class;
+    int log_level_offset;
+
+    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
+    struct AVCodec  *codec;
+    char             codec_name[32];
+    enum CodecID     codec_id; /* see CODEC_ID_xxx */
+
+    /**
+     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
+     * This is used to work around some encoder bugs.
+     * A demuxer should set this to what is stored in the field used to identify the codec.
+     * If there are multiple such fields in a container then the demuxer should choose the one
+     * which maximizes the information about the used codec.
+     * If the codec tag field in a container is larger than 32 bits then the demuxer should
+     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
+     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
+     * first.
+     * - encoding: Set by user, if not then the default based on codec_id will be used.
+     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
+     */
+    unsigned int codec_tag;
+
+    /**
+     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
+     * This is used to work around some encoder bugs.
+     * - encoding: unused
+     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
+     */
+    unsigned int stream_codec_tag;
+
+    /**
+     * Some codecs need additional format info. It is stored here.
+     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
+     * specific codec MUST set it correctly otherwise stream copy breaks.
+     * In general use of this field by muxers is not recommended.
+     * - encoding: Set by libavcodec.
+     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
+     */
+    int sub_id;
+
+    void *priv_data;
+
+    /**
+     * Private context used for internal data.
+     *
+     * Unlike priv_data, this is not codec-specific. It is used in general
+     * libavcodec functions.
+     */
+    struct AVCodecInternal *internal;
+
+    /**
+     * Private data of the user, can be used to carry app specific stuff.
+     * - encoding: Set by user.
+     * - decoding: Set by user.
+     */
+    void *opaque;
+
     /**
      * the average bitrate
      * - encoding: Set by user; unused for constant quantizer encoding.
@@ -1193,30 +1250,33 @@ typedef struct AVCodecContext {
     int bit_rate_tolerance;
 
     /**
-     * CODEC_FLAG_*.
+     * Global quality for codecs which cannot change it per frame.
+     * This should be proportional to MPEG-1/2/4 qscale.
      * - encoding: Set by user.
-     * - decoding: Set by user.
+     * - decoding: unused
      */
-    int flags;
+    int global_quality;
 
     /**
-     * Some codecs need additional format info. It is stored here.
-     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
-     * specific codec MUST set it correctly otherwise stream copy breaks.
-     * In general use of this field by muxers is not recommended.
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    int sub_id;
+    int compression_level;
+#define FF_COMPRESSION_DEFAULT -1
 
     /**
-     * Motion estimation algorithm used for video coding.
-     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
-     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
-     * - encoding: MUST be set by user.
-     * - decoding: unused
+     * CODEC_FLAG_*.
+     * - encoding: Set by user.
+     * - decoding: Set by user.
      */
-    int me_method;
+    int flags;
+
+    /**
+     * CODEC_FLAG2_*
+     * - encoding: Set by user.
+     * - decoding: Set by user.
+     */
+    int flags2;
 
     /**
      * some codecs need / can use extradata like Huffman tables.
@@ -1242,6 +1302,36 @@ typedef struct AVCodecContext {
      */
     AVRational time_base;
 
+    /**
+     * For some codecs, the time base is closer to the field rate than the frame rate.
+     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
+     * if no telecine is used ...
+     *
+     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
+     */
+    int ticks_per_frame;
+
+    /**
+     * Encoder delay.
+     *
+     * Video:
+     *   Number of frames the decoded output will be delayed relative to the
+     *   encoded input.
+     *
+     * Audio:
+     *   Number of "priming" samples added to the beginning of the stream
+     *   during encoding. The decoded output will be delayed by this many
+     *   samples relative to the input to the encoder. Note that this field is
+     *   purely informational and does not directly affect the pts output by
+     *   the encoder, which should always be based on the actual presentation
+     *   time, including any delay.
+     *
+     * - encoding: Set by libavcodec.
+     * - decoding: unused
+     */
+    int delay;
+
+
     /* video only */
     /**
      * picture width / height.
@@ -1252,6 +1342,13 @@ typedef struct AVCodecContext {
      */
     int width, height;
 
+    /**
+     * Bitstream width / height, may be different from width/height if lowres enabled.
+     * - encoding: unused
+     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
+     */
+    int coded_width, coded_height;
+
 #define FF_ASPECT_EXTENDED 15
 
     /**
@@ -1271,6 +1368,15 @@ typedef struct AVCodecContext {
     enum PixelFormat pix_fmt;
 
     /**
+     * Motion estimation algorithm used for video coding.
+     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
+     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
+     * - encoding: MUST be set by user.
+     * - decoding: unused
+     */
+    int me_method;
+
+    /**
      * If non NULL, 'draw_horiz_band' is called by the libavcodec
      * decoder to draw a horizontal band. It improves cache usage. Not
      * all codecs can do that. You must check the codec capabilities
@@ -1297,68 +1403,16 @@ typedef struct AVCodecContext {
                             const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
                             int y, int type, int height);
 
-    /* audio only */
-    int sample_rate; ///< samples per second
-    int channels;    ///< number of audio channels
-
-    /**
-     * audio sample format
-     * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
-     */
-    enum AVSampleFormat sample_fmt;  ///< sample format
-
-    /* The following data should not be initialized. */
     /**
-     * Samples per packet, initialized when calling 'init'.
-     */
-    int frame_size;
-    int frame_number;   ///< audio or video frame number
-
-    /**
-     * Encoder delay.
-     *
-     * Video:
-     *   Number of frames the decoded output will be delayed relative to the
-     *   encoded input.
-     *
-     * Audio:
-     *   Number of "priming" samples added to the beginning of the stream
-     *   during encoding. The decoded output will be delayed by this many
-     *   samples relative to the input to the encoder. Note that this field is
-     *   purely informational and does not directly affect the pts output by
-     *   the encoder, which should always be based on the actual presentation
-     *   time, including any delay.
-     *
-     * - encoding: Set by libavcodec.
-     * - decoding: unused
-     */
-    int delay;
-
-    /* - encoding parameters */
-    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
-    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
-
-    /**
-     * minimum quantizer
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int qmin;
-
-    /**
-     * maximum quantizer
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int qmax;
-
-    /**
-     * maximum quantizer difference between frames
-     * - encoding: Set by user.
-     * - decoding: unused
+     * callback to negotiate the pixelFormat
+     * @param fmt is the list of formats which are supported by the codec,
+     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
+     * The first is always the native one.
+     * @return the chosen format
+     * - encoding: unused
+     * - decoding: Set by user, if not set the native format will be chosen.
      */
-    int max_qdiff;
+    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
 
     /**
      * maximum number of B-frames between non-B-frames
@@ -1383,92 +1437,6 @@ typedef struct AVCodecContext {
 
     int b_frame_strategy;
 
-    struct AVCodec *codec;
-
-    void *priv_data;
-
-    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
-                            /* do its best to deliver a chunk with size     */
-                            /* below rtp_payload_size, the chunk will start */
-                            /* with a start code on some codecs like H.263. */
-                            /* This doesn't take account of any particular  */
-                            /* headers inside the transmitted RTP payload.  */
-
-
-    /* The RTP callback: This function is called    */
-    /* every time the encoder has a packet to send. */
-    /* It depends on the encoder if the data starts */
-    /* with a Start Code (it should). H.263 does.   */
-    /* mb_nb contains the number of macroblocks     */
-    /* encoded in the RTP payload.                  */
-    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
-
-    /* statistics, used for 2-pass encoding */
-    int mv_bits;
-    int header_bits;
-    int i_tex_bits;
-    int p_tex_bits;
-    int i_count;
-    int p_count;
-    int skip_count;
-    int misc_bits;
-
-    /**
-     * number of bits used for the previously encoded frame
-     * - encoding: Set by libavcodec.
-     * - decoding: unused
-     */
-    int frame_bits;
-
-    /**
-     * Private data of the user, can be used to carry app specific stuff.
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    void *opaque;
-
-    char codec_name[32];
-    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
-    enum CodecID codec_id; /* see CODEC_ID_xxx */
-
-    /**
-     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
-     * This is used to work around some encoder bugs.
-     * A demuxer should set this to what is stored in the field used to identify the codec.
-     * If there are multiple such fields in a container then the demuxer should choose the one
-     * which maximizes the information about the used codec.
-     * If the codec tag field in a container is larger than 32 bits then the demuxer should
-     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
-     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
-     * first.
-     * - encoding: Set by user, if not then the default based on codec_id will be used.
-     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
-     */
-    unsigned int codec_tag;
-
-    /**
-     * Work around bugs in encoders which sometimes cannot be detected automatically.
-     * - encoding: Set by user
-     * - decoding: Set by user
-     */
-    int workaround_bugs;
-#define FF_BUG_AUTODETECT       1  ///< autodetection
-#define FF_BUG_OLD_MSMPEG4      2
-#define FF_BUG_XVID_ILACE       4
-#define FF_BUG_UMP4             8
-#define FF_BUG_NO_PADDING       16
-#define FF_BUG_AMV              32
-#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
-#define FF_BUG_QPEL_CHROMA      64
-#define FF_BUG_STD_QPEL         128
-#define FF_BUG_QPEL_CHROMA2     256
-#define FF_BUG_DIRECT_BLOCKSIZE 512
-#define FF_BUG_EDGE             1024
-#define FF_BUG_HPEL_CHROMA      2048
-#define FF_BUG_DC_CLIP          4096
-#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
-#define FF_BUG_TRUNCATED       16384
-
     /**
      * luma single coefficient elimination threshold
      * - encoding: Set by user.
@@ -1484,25 +1452,6 @@ typedef struct AVCodecContext {
     int chroma_elim_threshold;
 
     /**
-     * strictly follow the standard (MPEG4, ...).
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     * Setting this to STRICT or higher means the encoder and decoder will
-     * generally do stupid things, whereas setting it to unofficial or lower
-     * will mean the encoder might produce output that is not supported by all
-     * spec-compliant decoders. Decoders don't differentiate between normal,
-     * unofficial and experimental (that is, they always try to decode things
-     * when they can) unless they are explicitly asked to behave stupidly
-     * (=strictly conform to the specs)
-     */
-    int strict_std_compliance;
-#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
-#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
-#define FF_COMPLIANCE_NORMAL        0
-#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
-#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
-
-    /**
      * qscale offset between IP and B-frames
      * - encoding: Set by user.
      * - decoding: unused
@@ -1510,74 +1459,6 @@ typedef struct AVCodecContext {
     float b_quant_offset;
 
     /**
-     * Called at the beginning of each frame to get a buffer for it.
-     *
-     * The function will set AVFrame.data[], AVFrame.linesize[].
-     * AVFrame.extended_data[] must also be set, but it should be the same as
-     * AVFrame.data[] except for planar audio with more channels than can fit
-     * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
-     * many data pointers as it can hold.
-     *
-     * if CODEC_CAP_DR1 is not set then get_buffer() must call
-     * avcodec_default_get_buffer() instead of providing buffers allocated by
-     * some other means.
-     *
-     * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
-     * need it. avcodec_default_get_buffer() aligns the output buffer properly,
-     * but if get_buffer() is overridden then alignment considerations should
-     * be taken into account.
-     *
-     * @see avcodec_default_get_buffer()
-     *
-     * Video:
-     *
-     * If pic.reference is set then the frame will be read later by libavcodec.
-     * avcodec_align_dimensions2() should be used to find the required width and
-     * height, as they normally need to be rounded up to the next multiple of 16.
-     *
-     * If frame multithreading is used and thread_safe_callbacks is set,
-     * it may be called from a different thread, but not from more than one at
-     * once. Does not need to be reentrant.
-     *
-     * @see release_buffer(), reget_buffer()
-     * @see avcodec_align_dimensions2()
-     *
-     * Audio:
-     *
-     * Decoders request a buffer of a particular size by setting
-     * AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
-     * however, utilize only part of the buffer by setting AVFrame.nb_samples
-     * to a smaller value in the output frame.
-     *
-     * Decoders cannot use the buffer after returning from
-     * avcodec_decode_audio4(), so they will not call release_buffer(), as it
-     * is assumed to be released immediately upon return.
-     *
-     * As a convenience, av_samples_get_buffer_size() and
-     * av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
-     * functions to find the required data size and to fill data pointers and
-     * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
-     * since all planes must be the same size.
-     *
-     * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
-     *
-     * - encoding: unused
-     * - decoding: Set by libavcodec, user can override.
-     */
-    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
-
-    /**
-     * Called to release buffers which were allocated with get_buffer.
-     * A released buffer can be reused in get_buffer().
-     * pic.data[*] must be set to NULL.
-     * May be called from a different thread if frame multithreading is used,
-     * but not by more than one thread at once, so does not need to be reentrant.
-     * - encoding: unused
-     * - decoding: Set by libavcodec, user can override.
-     */
-    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
-
-    /**
      * Size of the frame reordering buffer in the decoder.
      * For MPEG-2 it is 1 IPB or 0 low delay IP.
      * - encoding: Set by libavcodec.
@@ -1586,12 +1467,6 @@ typedef struct AVCodecContext {
     int has_b_frames;
 
     /**
-     * number of bytes per packet if constant and known or 0
-     * Used by some WAV based audio codecs.
-     */
-    int block_align;
-
-    /**
      * 0-> h263 quant 1-> mpeg quant
      * - encoding: Set by user.
      * - decoding: unused
@@ -1599,69 +1474,6 @@ typedef struct AVCodecContext {
     int mpeg_quant;
 
     /**
-     * pass1 encoding statistics output buffer
-     * - encoding: Set by libavcodec.
-     * - decoding: unused
-     */
-    char *stats_out;
-
-    /**
-     * pass2 encoding statistics input buffer
-     * Concatenated stuff from stats_out of pass1 should be placed here.
-     * - encoding: Allocated/set/freed by user.
-     * - decoding: unused
-     */
-    char *stats_in;
-
-    /**
-     * ratecontrol qmin qmax limiting method
-     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float rc_qsquish;
-
-    float rc_qmod_amp;
-    int rc_qmod_freq;
-
-    /**
-     * ratecontrol override, see RcOverride
-     * - encoding: Allocated/set/freed by user.
-     * - decoding: unused
-     */
-    RcOverride *rc_override;
-    int rc_override_count;
-
-    /**
-     * rate control equation
-     * - encoding: Set by user
-     * - decoding: unused
-     */
-    const char *rc_eq;
-
-    /**
-     * maximum bitrate
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_max_rate;
-
-    /**
-     * minimum bitrate
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_min_rate;
-
-    /**
-     * decoder bitstream buffer size
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int rc_buffer_size;
-    float rc_buffer_aggressivity;
-
-    /**
      * qscale factor between P and I-frames
      * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
      * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
@@ -1678,26 +1490,6 @@ typedef struct AVCodecContext {
     float i_quant_offset;
 
     /**
-     * initial complexity for pass1 ratecontrol
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    float rc_initial_cplx;
-
-    /**
-     * DCT algorithm, see FF_DCT_* below
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int dct_algo;
-#define FF_DCT_AUTO    0
-#define FF_DCT_FASTINT 1
-#define FF_DCT_INT     2
-#define FF_DCT_MMX     3
-#define FF_DCT_ALTIVEC 5
-#define FF_DCT_FAAN    6
-
-    /**
      * luminance masking (0-> disabled)
      * - encoding: Set by user.
      * - decoding: unused
@@ -1733,76 +1525,12 @@ typedef struct AVCodecContext {
     float dark_masking;
 
     /**
-     * IDCT algorithm, see FF_IDCT_* below.
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int idct_algo;
-#define FF_IDCT_AUTO          0
-#define FF_IDCT_INT           1
-#define FF_IDCT_SIMPLE        2
-#define FF_IDCT_SIMPLEMMX     3
-#define FF_IDCT_LIBMPEG2MMX   4
-#define FF_IDCT_MMI           5
-#define FF_IDCT_ARM           7
-#define FF_IDCT_ALTIVEC       8
-#define FF_IDCT_SH4           9
-#define FF_IDCT_SIMPLEARM     10
-#define FF_IDCT_H264          11
-#define FF_IDCT_VP3           12
-#define FF_IDCT_IPP           13
-#define FF_IDCT_XVIDMMX       14
-#define FF_IDCT_CAVS          15
-#define FF_IDCT_SIMPLEARMV5TE 16
-#define FF_IDCT_SIMPLEARMV6   17
-#define FF_IDCT_SIMPLEVIS     18
-#define FF_IDCT_WMV2          19
-#define FF_IDCT_FAAN          20
-#define FF_IDCT_EA            21
-#define FF_IDCT_SIMPLENEON    22
-#define FF_IDCT_SIMPLEALPHA   23
-#define FF_IDCT_BINK          24
-
-    /**
      * slice count
      * - encoding: Set by libavcodec.
      * - decoding: Set by user (or 0).
      */
     int slice_count;
     /**
-     * slice offsets in the frame in bytes
-     * - encoding: Set/allocated by libavcodec.
-     * - decoding: Set/allocated by user (or NULL).
-     */
-    int *slice_offset;
-
-    /**
-     * error concealment flags
-     * - encoding: unused
-     * - decoding: Set by user.
-     */
-    int error_concealment;
-#define FF_EC_GUESS_MVS   1
-#define FF_EC_DEBLOCK     2
-
-    /**
-     * dsp_mask could be add used to disable unwanted CPU features
-     * CPU features (i.e. MMX, SSE. ...)
-     *
-     * With the FORCE flag you may instead enable given CPU features.
-     * (Dangerous: Usable in case of misdetection, improper usage however will
-     * result into program crash.)
-     */
-    unsigned dsp_mask;
-
-    /**
-     * bits per sample/pixel from the demuxer (needed for huffyuv).
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by user.
-     */
-     int bits_per_coded_sample;
-
-    /**
      * prediction method (needed for huffyuv)
      * - encoding: Set by user.
      * - decoding: unused
@@ -1813,6 +1541,13 @@ typedef struct AVCodecContext {
 #define FF_PRED_MEDIAN 2
 
     /**
+     * slice offsets in the frame in bytes
+     * - encoding: Set/allocated by libavcodec.
+     * - decoding: Set/allocated by user (or NULL).
+     */
+    int *slice_offset;
+
+    /**
      * sample aspect ratio (0 if unknown)
      * That is the width of a pixel divided by the height of the pixel.
      * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
@@ -1822,54 +1557,6 @@ typedef struct AVCodecContext {
     AVRational sample_aspect_ratio;
 
     /**
-     * the picture in the bitstream
-     * - encoding: Set by libavcodec.
-     * - decoding: Set by libavcodec.
-     */
-    AVFrame *coded_frame;
-
-    /**
-     * debug
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int debug;
-#define FF_DEBUG_PICT_INFO   1
-#define FF_DEBUG_RC          2
-#define FF_DEBUG_BITSTREAM   4
-#define FF_DEBUG_MB_TYPE     8
-#define FF_DEBUG_QP          16
-#define FF_DEBUG_MV          32
-#define FF_DEBUG_DCT_COEFF   0x00000040
-#define FF_DEBUG_SKIP        0x00000080
-#define FF_DEBUG_STARTCODE   0x00000100
-#define FF_DEBUG_PTS         0x00000200
-#define FF_DEBUG_ER          0x00000400
-#define FF_DEBUG_MMCO        0x00000800
-#define FF_DEBUG_BUGS        0x00001000
-#define FF_DEBUG_VIS_QP      0x00002000
-#define FF_DEBUG_VIS_MB_TYPE 0x00004000
-#define FF_DEBUG_BUFFERS     0x00008000
-#define FF_DEBUG_THREADS     0x00010000
-
-    /**
-     * debug
-     * - encoding: Set by user.
-     * - decoding: Set by user.
-     */
-    int debug_mv;
-#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
-#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
-#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
-
-    /**
-     * error
-     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
-     * - decoding: unused
-     */
-    uint64_t error[AV_NUM_DATA_POINTERS];
-
-    /**
      * motion estimation comparison function
      * - encoding: Set by user.
      * - decoding: unused
@@ -1953,17 +1640,6 @@ typedef struct AVCodecContext {
     int me_subpel_quality;
 
     /**
-     * callback to negotiate the pixelFormat
-     * @param fmt is the list of formats which are supported by the codec,
-     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
-     * The first is always the native one.
-     * @return the chosen format
-     * - encoding: unused
-     * - decoding: Set by user, if not set the native format will be chosen.
-     */
-    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
-
-    /**
      * DTG active format information (additional aspect ratio
      * information only used in DVB MPEG-2 transport streams)
      * 0 if not set.
@@ -2013,33 +1689,6 @@ typedef struct AVCodecContext {
     int color_table_id;
 
     /**
-     * Global quality for codecs which cannot change it per frame.
-     * This should be proportional to MPEG-1/2/4 qscale.
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int global_quality;
-
-#define FF_CODER_TYPE_VLC       0
-#define FF_CODER_TYPE_AC        1
-#define FF_CODER_TYPE_RAW       2
-#define FF_CODER_TYPE_RLE       3
-#define FF_CODER_TYPE_DEFLATE   4
-    /**
-     * coder type
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int coder_type;
-
-    /**
-     * context model
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
-    int context_model;
-
-    /**
      * slice flags
      * - encoding: unused
      * - decoding: Set by user.
@@ -2081,14 +1730,6 @@ typedef struct AVCodecContext {
     uint16_t *inter_matrix;
 
     /**
-     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
-     * This is used to work around some encoder bugs.
-     * - encoding: unused
-     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
-     */
-    unsigned int stream_codec_tag;
-
-    /**
      * scene change detection threshold
      * 0 is default, larger means fewer detected scene changes.
      * - encoding: Set by user.
@@ -2097,389 +1738,520 @@ typedef struct AVCodecContext {
     int scenechange_threshold;
 
     /**
-     * minimum Lagrange multipler
+     * noise reduction strength
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int lmin;
+    int noise_reduction;
 
     /**
-     * maximum Lagrange multipler
+     *
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int lmax;
+    int inter_threshold;
 
     /**
-     * noise reduction strength
+     * quantizer noise shaping
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int noise_reduction;
+    int quantizer_noise_shaping;
 
     /**
-     * Called at the beginning of a frame to get cr buffer for it.
-     * Buffer type (size, hints) must be the same. libavcodec won't check it.
-     * libavcodec will pass previous buffer in pic, function should return
-     * same buffer or new buffer with old frame "painted" into it.
-     * If pic.data[0] == NULL must behave like get_buffer().
-     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
-     * avcodec_default_reget_buffer() instead of providing buffers allocated by
-     * some other means.
-     * - encoding: unused
-     * - decoding: Set by libavcodec, user can override.
+     * Motion estimation threshold below which no motion estimation is
+     * performed, but instead the user specified motion vectors are used.
+     *
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
+    int me_threshold;
 
     /**
-     * Number of bits which should be loaded into the rc buffer before decoding starts.
+     * Macroblock threshold below which the user specified macroblock types will be used.
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int rc_initial_buffer_occupancy;
+    int mb_threshold;
 
     /**
-     *
+     * precision of the intra DC coefficient - 8
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int inter_threshold;
+    int intra_dc_precision;
 
     /**
-     * CODEC_FLAG2_*
-     * - encoding: Set by user.
+     * Number of macroblock rows at the top which are skipped.
+     * - encoding: unused
      * - decoding: Set by user.
      */
-    int flags2;
+    int skip_top;
 
     /**
-     * Simulates errors in the bitstream to test error concealment.
+     * Number of macroblock rows at the bottom which are skipped.
+     * - encoding: unused
+     * - decoding: Set by user.
+     */
+    int skip_bottom;
+
+    /**
+     * Border processing masking, raises the quantizer for mbs on the borders
+     * of the picture.
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int error_rate;
+    float border_masking;
 
     /**
-     * quantizer noise shaping
+     * minimum MB lagrange multipler
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int quantizer_noise_shaping;
+    int mb_lmin;
 
     /**
-     * thread count
-     * is used to decide how many independent tasks should be passed to execute()
+     * maximum MB lagrange multipler
      * - encoding: Set by user.
-     * - decoding: Set by user.
+     * - decoding: unused
      */
-    int thread_count;
+    int mb_lmax;
 
     /**
-     * The codec may call this to execute several independent things.
-     * It will return only after finishing all tasks.
-     * The user may replace this with some multithreaded implementation,
-     * the default implementation will execute the parts serially.
-     * @param count the number of things to execute
-     * - encoding: Set by libavcodec, user can override.
-     * - decoding: Set by libavcodec, user can override.
+     *
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
+    int me_penalty_compensation;
 
     /**
-     * thread opaque
-     * Can be used by execute() to store some per AVCodecContext stuff.
-     * - encoding: set by execute()
-     * - decoding: set by execute()
+     *
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    void *thread_opaque;
+    int bidir_refine;
 
     /**
-     * Motion estimation threshold below which no motion estimation is
-     * performed, but instead the user specified motion vectors are used.
      *
      * - encoding: Set by user.
      * - decoding: unused
      */
-     int me_threshold;
+    int brd_scale;
 
     /**
-     * Macroblock threshold below which the user specified macroblock types will be used.
+     * minimum GOP size
      * - encoding: Set by user.
      * - decoding: unused
      */
-     int mb_threshold;
+    int keyint_min;
 
     /**
-     * precision of the intra DC coefficient - 8
+     * number of reference frames
      * - encoding: Set by user.
-     * - decoding: unused
+     * - decoding: Set by lavc.
      */
-     int intra_dc_precision;
+    int refs;
 
     /**
-     * noise vs. sse weight for the nsse comparsion function
+     * chroma qp offset from luma
      * - encoding: Set by user.
      * - decoding: unused
      */
-     int nsse_weight;
+    int chromaoffset;
 
     /**
-     * Number of macroblock rows at the top which are skipped.
-     * - encoding: unused
-     * - decoding: Set by user.
+     * Multiplied by qscale for each frame and added to scene_change_score.
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-     int skip_top;
+    int scenechange_factor;
 
     /**
-     * Number of macroblock rows at the bottom which are skipped.
-     * - encoding: unused
-     * - decoding: Set by user.
+     *
+     * Note: Value depends upon the compare function used for fullpel ME.
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-     int skip_bottom;
+    int mv0_threshold;
 
     /**
-     * profile
+     * Adjust sensitivity of b_frame_strategy 1.
      * - encoding: Set by user.
-     * - decoding: Set by libavcodec.
+     * - decoding: unused
      */
-     int profile;
-#define FF_PROFILE_UNKNOWN -99
-#define FF_PROFILE_RESERVED -100
+    int b_sensitivity;
 
-#define FF_PROFILE_AAC_MAIN 0
-#define FF_PROFILE_AAC_LOW  1
-#define FF_PROFILE_AAC_SSR  2
-#define FF_PROFILE_AAC_LTP  3
+    /**
+     * Chromaticity coordinates of the source primaries.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVColorPrimaries color_primaries;
 
-#define FF_PROFILE_DTS         20
-#define FF_PROFILE_DTS_ES      30
-#define FF_PROFILE_DTS_96_24   40
-#define FF_PROFILE_DTS_HD_HRA  50
-#define FF_PROFILE_DTS_HD_MA   60
+    /**
+     * Color Transfer Characteristic.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVColorTransferCharacteristic color_trc;
 
-#define FF_PROFILE_MPEG2_422    0
-#define FF_PROFILE_MPEG2_HIGH   1
-#define FF_PROFILE_MPEG2_SS     2
-#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
-#define FF_PROFILE_MPEG2_MAIN   4
-#define FF_PROFILE_MPEG2_SIMPLE 5
+    /**
+     * YUV colorspace type.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVColorSpace colorspace;
 
-#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
-#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
+    /**
+     * MPEG vs JPEG YUV range.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVColorRange color_range;
 
-#define FF_PROFILE_H264_BASELINE             66
-#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
-#define FF_PROFILE_H264_MAIN                 77
-#define FF_PROFILE_H264_EXTENDED             88
-#define FF_PROFILE_H264_HIGH                 100
-#define FF_PROFILE_H264_HIGH_10              110
-#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
-#define FF_PROFILE_H264_HIGH_422             122
-#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
-#define FF_PROFILE_H264_HIGH_444             144
-#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
-#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
-#define FF_PROFILE_H264_CAVLC_444            44
+    /**
+     * This defines the location of chroma samples.
+     * - encoding: Set by user
+     * - decoding: Set by libavcodec
+     */
+    enum AVChromaLocation chroma_sample_location;
 
-#define FF_PROFILE_VC1_SIMPLE   0
-#define FF_PROFILE_VC1_MAIN     1
-#define FF_PROFILE_VC1_COMPLEX  2
-#define FF_PROFILE_VC1_ADVANCED 3
+    /**
+     * Number of slices.
+     * Indicates number of picture subdivisions. Used for parallelized
+     * decoding.
+     * - encoding: Set by user
+     * - decoding: unused
+     */
+    int slices;
 
-#define FF_PROFILE_MPEG4_SIMPLE                     0
-#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE            1
-#define FF_PROFILE_MPEG4_CORE                       2
-#define FF_PROFILE_MPEG4_MAIN                       3
-#define FF_PROFILE_MPEG4_N_BIT                      4
-#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE           5
-#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION      6
-#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE     7
-#define FF_PROFILE_MPEG4_HYBRID                     8
-#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME         9
-#define FF_PROFILE_MPEG4_CORE_SCALABLE             10
-#define FF_PROFILE_MPEG4_ADVANCED_CODING           11
-#define FF_PROFILE_MPEG4_ADVANCED_CORE             12
-#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
-#define FF_PROFILE_MPEG4_SIMPLE_STUDIO             14
-#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE           15
+    /** Field order
+     * - encoding: set by libavcodec
+     * - decoding: Set by libavcodec
+     */
+    enum AVFieldOrder field_order;
+
+    /* audio only */
+    int sample_rate; ///< samples per second
+    int channels;    ///< number of audio channels
 
     /**
-     * level
+     * audio sample format
      * - encoding: Set by user.
      * - decoding: Set by libavcodec.
      */
-     int level;
-#define FF_LEVEL_UNKNOWN -99
+    enum AVSampleFormat sample_fmt;  ///< sample format
 
+    /* The following data should not be initialized. */
     /**
-     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
+     * Samples per packet, initialized when calling 'init'.
+     */
+    int frame_size;
+    int frame_number;   ///< audio or video frame number
+
+    /**
+     * number of bytes per packet if constant and known or 0
+     * Used by some WAV based audio codecs.
+     */
+    int block_align;
+
+    /**
+     * Audio cutoff bandwidth (0 means "automatic")
+     * - encoding: Set by user.
+     * - decoding: unused
+     */
+    int cutoff;
+
+#if FF_API_REQUEST_CHANNELS
+    /**
+     * Decoder should decode to this many channels if it can (0 for default)
      * - encoding: unused
      * - decoding: Set by user.
+     * @deprecated Deprecated in favor of request_channel_layout.
      */
-     int lowres;
+    int request_channels;
+#endif
 
     /**
-     * Bitstream width / height, may be different from width/height if lowres enabled.
+     * Audio channel layout.
+     * - encoding: set by user.
+     * - decoding: set by libavcodec.
+     */
+    uint64_t channel_layout;
+
+    /**
+     * Request decoder to use this channel layout if it can (0 for default)
      * - encoding: unused
-     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
+     * - decoding: Set by user.
      */
-    int coded_width, coded_height;
+    uint64_t request_channel_layout;
 
     /**
-     * frame skip threshold
+     * Type of service that the audio stream conveys.
      * - encoding: Set by user.
-     * - decoding: unused
+     * - decoding: Set by libavcodec.
      */
-    int frame_skip_threshold;
+    enum AVAudioServiceType audio_service_type;
 
     /**
-     * frame skip factor
+     * Used to request a sample format from the decoder.
+     * - encoding: unused.
+     * - decoding: Set by user.
+     */
+    enum AVSampleFormat request_sample_fmt;
+
+    /**
+     * Called at the beginning of each frame to get a buffer for it.
+     *
+     * The function will set AVFrame.data[], AVFrame.linesize[].
+     * AVFrame.extended_data[] must also be set, but it should be the same as
+     * AVFrame.data[] except for planar audio with more channels than can fit
+     * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
+     * many data pointers as it can hold.
+     *
+     * if CODEC_CAP_DR1 is not set then get_buffer() must call
+     * avcodec_default_get_buffer() instead of providing buffers allocated by
+     * some other means.
+     *
+     * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
+     * need it. avcodec_default_get_buffer() aligns the output buffer properly,
+     * but if get_buffer() is overridden then alignment considerations should
+     * be taken into account.
+     *
+     * @see avcodec_default_get_buffer()
+     *
+     * Video:
+     *
+     * If pic.reference is set then the frame will be read later by libavcodec.
+     * avcodec_align_dimensions2() should be used to find the required width and
+     * height, as they normally need to be rounded up to the next multiple of 16.
+     *
+     * If frame multithreading is used and thread_safe_callbacks is set,
+     * it may be called from a different thread, but not from more than one at
+     * once. Does not need to be reentrant.
+     *
+     * @see release_buffer(), reget_buffer()
+     * @see avcodec_align_dimensions2()
+     *
+     * Audio:
+     *
+     * Decoders request a buffer of a particular size by setting
+     * AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
+     * however, utilize only part of the buffer by setting AVFrame.nb_samples
+     * to a smaller value in the output frame.
+     *
+     * Decoders cannot use the buffer after returning from
+     * avcodec_decode_audio4(), so they will not call release_buffer(), as it
+     * is assumed to be released immediately upon return.
+     *
+     * As a convenience, av_samples_get_buffer_size() and
+     * av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
+     * functions to find the required data size and to fill data pointers and
+     * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
+     * since all planes must be the same size.
+     *
+     * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec, user can override.
+     */
+    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+    /**
+     * Called to release buffers which were allocated with get_buffer.
+     * A released buffer can be reused in get_buffer().
+     * pic.data[*] must be set to NULL.
+     * May be called from a different thread if frame multithreading is used,
+     * but not by more than one thread at once, so does not need to be reentrant.
+     * - encoding: unused
+     * - decoding: Set by libavcodec, user can override.
+     */
+    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+    /**
+     * Called at the beginning of a frame to get cr buffer for it.
+     * Buffer type (size, hints) must be the same. libavcodec won't check it.
+     * libavcodec will pass previous buffer in pic, function should return
+     * same buffer or new buffer with old frame "painted" into it.
+     * If pic.data[0] == NULL must behave like get_buffer().
+     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
+     * avcodec_default_reget_buffer() instead of providing buffers allocated by
+     * some other means.
+     * - encoding: unused
+     * - decoding: Set by libavcodec, user can override.
+     */
+    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+
+    /* - encoding parameters */
+    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
+    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
+
+    /**
+     * minimum quantizer
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int frame_skip_factor;
+    int qmin;
 
     /**
-     * frame skip exponent
+     * maximum quantizer
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int frame_skip_exp;
+    int qmax;
 
     /**
-     * frame skip comparison function
+     * maximum quantizer difference between frames
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int frame_skip_cmp;
+    int max_qdiff;
 
     /**
-     * Border processing masking, raises the quantizer for mbs on the borders
-     * of the picture.
+     * ratecontrol qmin qmax limiting method
+     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
      * - encoding: Set by user.
      * - decoding: unused
      */
-    float border_masking;
+    float rc_qsquish;
+
+    float rc_qmod_amp;
+    int rc_qmod_freq;
 
     /**
-     * minimum MB lagrange multipler
+     * decoder bitstream buffer size
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int mb_lmin;
+    int rc_buffer_size;
 
     /**
-     * maximum MB lagrange multipler
-     * - encoding: Set by user.
+     * ratecontrol override, see RcOverride
+     * - encoding: Allocated/set/freed by user.
      * - decoding: unused
      */
-    int mb_lmax;
+    int rc_override_count;
+    RcOverride *rc_override;
 
     /**
-     *
+     * rate control equation
+     * - encoding: Set by user
+     * - decoding: unused
+     */
+    const char *rc_eq;
+
+    /**
+     * maximum bitrate
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int me_penalty_compensation;
+    int rc_max_rate;
 
     /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
+     * minimum bitrate
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    enum AVDiscard skip_loop_filter;
+    int rc_min_rate;
+
+    float rc_buffer_aggressivity;
 
     /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
+     * initial complexity for pass1 ratecontrol
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    enum AVDiscard skip_idct;
+    float rc_initial_cplx;
 
     /**
-     *
-     * - encoding: unused
-     * - decoding: Set by user.
+     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
+     * - encoding: Set by user.
+     * - decoding: unused.
      */
-    enum AVDiscard skip_frame;
+    float rc_max_available_vbv_use;
 
     /**
-     *
+     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
      * - encoding: Set by user.
-     * - decoding: unused
+     * - decoding: unused.
      */
-    int bidir_refine;
+    float rc_min_vbv_overflow_use;
 
     /**
-     *
+     * Number of bits which should be loaded into the rc buffer before decoding starts.
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int brd_scale;
+    int rc_initial_buffer_occupancy;
 
+#define FF_CODER_TYPE_VLC       0
+#define FF_CODER_TYPE_AC        1
+#define FF_CODER_TYPE_RAW       2
+#define FF_CODER_TYPE_RLE       3
+#define FF_CODER_TYPE_DEFLATE   4
     /**
-     * minimum GOP size
+     * coder type
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int keyint_min;
+    int coder_type;
 
     /**
-     * number of reference frames
+     * context model
      * - encoding: Set by user.
-     * - decoding: Set by lavc.
+     * - decoding: unused
      */
-    int refs;
+    int context_model;
 
     /**
-     * chroma qp offset from luma
+     * minimum Lagrange multipler
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int chromaoffset;
+    int lmin;
 
     /**
-     * trellis RD quantization
+     * maximum Lagrange multipler
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int trellis;
+    int lmax;
 
     /**
-     * Audio cutoff bandwidth (0 means "automatic")
+     * frame skip threshold
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int cutoff;
+    int frame_skip_threshold;
 
     /**
-     * Multiplied by qscale for each frame and added to scene_change_score.
+     * frame skip factor
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int scenechange_factor;
+    int frame_skip_factor;
 
     /**
-     *
-     * Note: Value depends upon the compare function used for fullpel ME.
+     * frame skip exponent
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int mv0_threshold;
+    int frame_skip_exp;
 
     /**
-     * Adjust sensitivity of b_frame_strategy 1.
+     * frame skip comparison function
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int b_sensitivity;
+    int frame_skip_cmp;
 
     /**
+     * trellis RD quantization
      * - encoding: Set by user.
      * - decoding: unused
      */
-    int compression_level;
-#define FF_COMPRESSION_DEFAULT -1
+    int trellis;
 
     /**
      * - encoding: Set by user.
@@ -2500,59 +2272,157 @@ typedef struct AVCodecContext {
      */
     int64_t timecode_frame_start;
 
-#if FF_API_REQUEST_CHANNELS
+    /* The RTP callback: This function is called    */
+    /* every time the encoder has a packet to send. */
+    /* It depends on the encoder if the data starts */
+    /* with a Start Code (it should). H.263 does.   */
+    /* mb_nb contains the number of macroblocks     */
+    /* encoded in the RTP payload.                  */
+    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
+
+    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
+                            /* do its best to deliver a chunk with size     */
+                            /* below rtp_payload_size, the chunk will start */
+                            /* with a start code on some codecs like H.263. */
+                            /* This doesn't take account of any particular  */
+                            /* headers inside the transmitted RTP payload.  */
+
+    /* statistics, used for 2-pass encoding */
+    int mv_bits;
+    int header_bits;
+    int i_tex_bits;
+    int p_tex_bits;
+    int i_count;
+    int p_count;
+    int skip_count;
+    int misc_bits;
+
     /**
-     * Decoder should decode to this many channels if it can (0 for default)
-     * - encoding: unused
-     * - decoding: Set by user.
-     * @deprecated Deprecated in favor of request_channel_layout.
+     * number of bits used for the previously encoded frame
+     * - encoding: Set by libavcodec.
+     * - decoding: unused
      */
-    int request_channels;
-#endif
+    int frame_bits;
 
     /**
-     * opaque 64bit number (generally a PTS) that will be reordered and
-     * output in AVFrame.reordered_opaque
-     * @deprecated in favor of pkt_pts
-     * - encoding: unused
-     * - decoding: Set by user.
+     * pass1 encoding statistics output buffer
+     * - encoding: Set by libavcodec.
+     * - decoding: unused
      */
-    int64_t reordered_opaque;
+    char *stats_out;
 
     /**
-     * Bits per sample/pixel of internal libavcodec pixel/sample format.
-     * - encoding: set by user.
-     * - decoding: set by libavcodec.
+     * pass2 encoding statistics input buffer
+     * Concatenated stuff from stats_out of pass1 should be placed here.
+     * - encoding: Allocated/set/freed by user.
+     * - decoding: unused
      */
-    int bits_per_raw_sample;
+    char *stats_in;
 
     /**
-     * Audio channel layout.
-     * - encoding: set by user.
-     * - decoding: set by libavcodec.
+     * Work around bugs in encoders which sometimes cannot be detected automatically.
+     * - encoding: Set by user
+     * - decoding: Set by user
      */
-    uint64_t channel_layout;
+    int workaround_bugs;
+#define FF_BUG_AUTODETECT       1  ///< autodetection
+#define FF_BUG_OLD_MSMPEG4      2
+#define FF_BUG_XVID_ILACE       4
+#define FF_BUG_UMP4             8
+#define FF_BUG_NO_PADDING       16
+#define FF_BUG_AMV              32
+#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
+#define FF_BUG_QPEL_CHROMA      64
+#define FF_BUG_STD_QPEL         128
+#define FF_BUG_QPEL_CHROMA2     256
+#define FF_BUG_DIRECT_BLOCKSIZE 512
+#define FF_BUG_EDGE             1024
+#define FF_BUG_HPEL_CHROMA      2048
+#define FF_BUG_DC_CLIP          4096
+#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
+#define FF_BUG_TRUNCATED       16384
 
     /**
-     * Request decoder to use this channel layout if it can (0 for default)
+     * strictly follow the standard (MPEG4, ...).
+     * - encoding: Set by user.
+     * - decoding: Set by user.
+     * Setting this to STRICT or higher means the encoder and decoder will
+     * generally do stupid things, whereas setting it to unofficial or lower
+     * will mean the encoder might produce output that is not supported by all
+     * spec-compliant decoders. Decoders don't differentiate between normal,
+     * unofficial and experimental (that is, they always try to decode things
+     * when they can) unless they are explicitly asked to behave stupidly
+     * (=strictly conform to the specs)
+     */
+    int strict_std_compliance;
+#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
+#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
+#define FF_COMPLIANCE_NORMAL        0
+#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
+#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
+
+    /**
+     * error concealment flags
      * - encoding: unused
      * - decoding: Set by user.
      */
-    uint64_t request_channel_layout;
+    int error_concealment;
+#define FF_EC_GUESS_MVS   1
+#define FF_EC_DEBLOCK     2
 
     /**
-     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
+     * debug
      * - encoding: Set by user.
-     * - decoding: unused.
+     * - decoding: Set by user.
      */
-    float rc_max_available_vbv_use;
+    int debug;
+#define FF_DEBUG_PICT_INFO   1
+#define FF_DEBUG_RC          2
+#define FF_DEBUG_BITSTREAM   4
+#define FF_DEBUG_MB_TYPE     8
+#define FF_DEBUG_QP          16
+#define FF_DEBUG_MV          32
+#define FF_DEBUG_DCT_COEFF   0x00000040
+#define FF_DEBUG_SKIP        0x00000080
+#define FF_DEBUG_STARTCODE   0x00000100
+#define FF_DEBUG_PTS         0x00000200
+#define FF_DEBUG_ER          0x00000400
+#define FF_DEBUG_MMCO        0x00000800
+#define FF_DEBUG_BUGS        0x00001000
+#define FF_DEBUG_VIS_QP      0x00002000
+#define FF_DEBUG_VIS_MB_TYPE 0x00004000
+#define FF_DEBUG_BUFFERS     0x00008000
+#define FF_DEBUG_THREADS     0x00010000
 
     /**
-     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
+     * debug
      * - encoding: Set by user.
-     * - decoding: unused.
+     * - decoding: Set by user.
      */
-    float rc_min_vbv_overflow_use;
+    int debug_mv;
+#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
+#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
+#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
+
+    /**
+     * Error recognition; may misdetect some more or less valid parts as errors.
+     * - encoding: unused
+     * - decoding: Set by user.
+     */
+    int err_recognition;
+#define AV_EF_CRCCHECK  (1<<0)
+#define AV_EF_BITSTREAM (1<<1)
+#define AV_EF_BUFFER    (1<<2)
+#define AV_EF_EXPLODE   (1<<3)
+
+    /**
+     * opaque 64bit number (generally a PTS) that will be reordered and
+     * output in AVFrame.reordered_opaque
+     * @deprecated in favor of pkt_pts
+     * - encoding: unused
+     * - decoding: Set by user.
+     */
+    int64_t reordered_opaque;
 
     /**
      * Hardware accelerator in use
@@ -2562,15 +2432,6 @@ typedef struct AVCodecContext {
     struct AVHWAccel *hwaccel;
 
     /**
-     * For some codecs, the time base is closer to the field rate than the frame rate.
-     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
-     * if no telecine is used ...
-     *
-     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
-     */
-    int ticks_per_frame;
-
-    /**
      * Hardware accelerator context.
      * For some hardware accelerators, a global context needs to be
      * provided by the user. In that case, this holds display-dependent
@@ -2583,90 +2444,101 @@ typedef struct AVCodecContext {
     void *hwaccel_context;
 
     /**
-     * Chromaticity coordinates of the source primaries.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
+     * error
+     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
+     * - decoding: unused
      */
-    enum AVColorPrimaries color_primaries;
+    uint64_t error[AV_NUM_DATA_POINTERS];
 
     /**
-     * Color Transfer Characteristic.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
+     * DCT algorithm, see FF_DCT_* below
+     * - encoding: Set by user.
+     * - decoding: unused
      */
-    enum AVColorTransferCharacteristic color_trc;
+    int dct_algo;
+#define FF_DCT_AUTO    0
+#define FF_DCT_FASTINT 1
+#define FF_DCT_INT     2
+#define FF_DCT_MMX     3
+#define FF_DCT_ALTIVEC 5
+#define FF_DCT_FAAN    6
 
     /**
-     * YUV colorspace type.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
+     * IDCT algorithm, see FF_IDCT_* below.
+     * - encoding: Set by user.
+     * - decoding: Set by user.
      */
-    enum AVColorSpace colorspace;
+    int idct_algo;
+#define FF_IDCT_AUTO          0
+#define FF_IDCT_INT           1
+#define FF_IDCT_SIMPLE        2
+#define FF_IDCT_SIMPLEMMX     3
+#define FF_IDCT_LIBMPEG2MMX   4
+#define FF_IDCT_MMI           5
+#define FF_IDCT_ARM           7
+#define FF_IDCT_ALTIVEC       8
+#define FF_IDCT_SH4           9
+#define FF_IDCT_SIMPLEARM     10
+#define FF_IDCT_H264          11
+#define FF_IDCT_VP3           12
+#define FF_IDCT_IPP           13
+#define FF_IDCT_XVIDMMX       14
+#define FF_IDCT_CAVS          15
+#define FF_IDCT_SIMPLEARMV5TE 16
+#define FF_IDCT_SIMPLEARMV6   17
+#define FF_IDCT_SIMPLEVIS     18
+#define FF_IDCT_WMV2          19
+#define FF_IDCT_FAAN          20
+#define FF_IDCT_EA            21
+#define FF_IDCT_SIMPLENEON    22
+#define FF_IDCT_SIMPLEALPHA   23
+#define FF_IDCT_BINK          24
 
     /**
-     * MPEG vs JPEG YUV range.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
+     * dsp_mask could be add used to disable unwanted CPU features
+     * CPU features (i.e. MMX, SSE. ...)
+     *
+     * With the FORCE flag you may instead enable given CPU features.
+     * (Dangerous: Usable in case of misdetection, improper usage however will
+     * result into program crash.)
      */
-    enum AVColorRange color_range;
+    unsigned dsp_mask;
 
     /**
-     * This defines the location of chroma samples.
-     * - encoding: Set by user
-     * - decoding: Set by libavcodec
+     * bits per sample/pixel from the demuxer (needed for huffyuv).
+     * - encoding: Set by libavcodec.
+     * - decoding: Set by user.
      */
-    enum AVChromaLocation chroma_sample_location;
+     int bits_per_coded_sample;
 
     /**
-     * The codec may call this to execute several independent things.
-     * It will return only after finishing all tasks.
-     * The user may replace this with some multithreaded implementation,
-     * the default implementation will execute the parts serially.
-     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
-     * @param c context passed also to func
-     * @param count the number of things to execute
-     * @param arg2 argument passed unchanged to func
-     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
-     * @param func function that will be called count times, with jobnr from 0 to count-1.
-     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
-     *             two instances of func executing at the same time will have the same threadnr.
-     * @return always 0 currently, but code should handle a future improvement where when any call to func
-     *         returns < 0 no further calls to func may be done and < 0 is returned.
-     * - encoding: Set by libavcodec, user can override.
-     * - decoding: Set by libavcodec, user can override.
+     * Bits per sample/pixel of internal libavcodec pixel/sample format.
+     * - encoding: set by user.
+     * - decoding: set by libavcodec.
      */
-    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
-
-    int log_level_offset;
+    int bits_per_raw_sample;
 
     /**
-     * Number of slices.
-     * Indicates number of picture subdivisions. Used for parallelized
-     * decoding.
-     * - encoding: Set by user
-     * - decoding: unused
+     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
+     * - encoding: unused
+     * - decoding: Set by user.
      */
-    int slices;
+     int lowres;
 
     /**
-     * Header containing style information for text subtitles.
-     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
-     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
-     * the Format line following. It shouldn't include any Dialogue line.
-     * - encoding: Set/allocated/freed by user (before avcodec_open2())
-     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
+     * the picture in the bitstream
+     * - encoding: Set by libavcodec.
+     * - decoding: Set by libavcodec.
      */
-    uint8_t *subtitle_header;
-    int subtitle_header_size;
+    AVFrame *coded_frame;
 
     /**
-     * Current packet as passed into the decoder, to avoid having
-     * to pass the packet into every function. Currently only valid
-     * inside lavc and get/release_buffer callbacks.
-     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
-     * - encoding: unused
+     * thread count
+     * is used to decide how many independent tasks should be passed to execute()
+     * - encoding: Set by user.
+     * - decoding: Set by user.
      */
-    AVPacket *pkt;
+    int thread_count;
 
     /**
      * Which multithreading methods to use.
@@ -2698,51 +2570,180 @@ typedef struct AVCodecContext {
     int thread_safe_callbacks;
 
     /**
-     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
-     * Used for compliant TS muxing.
-     * - encoding: Set by libavcodec.
-     * - decoding: unused.
+     * The codec may call this to execute several independent things.
+     * It will return only after finishing all tasks.
+     * The user may replace this with some multithreaded implementation,
+     * the default implementation will execute the parts serially.
+     * @param count the number of things to execute
+     * - encoding: Set by libavcodec, user can override.
+     * - decoding: Set by libavcodec, user can override.
      */
-    uint64_t vbv_delay;
+    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
 
     /**
-     * Type of service that the audio stream conveys.
+     * The codec may call this to execute several independent things.
+     * It will return only after finishing all tasks.
+     * The user may replace this with some multithreaded implementation,
+     * the default implementation will execute the parts serially.
+     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
+     * @param c context passed also to func
+     * @param count the number of things to execute
+     * @param arg2 argument passed unchanged to func
+     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
+     * @param func function that will be called count times, with jobnr from 0 to count-1.
+     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
+     *             two instances of func executing at the same time will have the same threadnr.
+     * @return always 0 currently, but code should handle a future improvement where when any call to func
+     *         returns < 0 no further calls to func may be done and < 0 is returned.
+     * - encoding: Set by libavcodec, user can override.
+     * - decoding: Set by libavcodec, user can override.
+     */
+    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
+
+    /**
+     * thread opaque
+     * Can be used by execute() to store some per AVCodecContext stuff.
+     * - encoding: set by execute()
+     * - decoding: set by execute()
+     */
+    void *thread_opaque;
+
+    /**
+     * noise vs. sse weight for the nsse comparsion function
+     * - encoding: Set by user.
+     * - decoding: unused
+     */
+     int nsse_weight;
+
+    /**
+     * profile
      * - encoding: Set by user.
      * - decoding: Set by libavcodec.
      */
-    enum AVAudioServiceType audio_service_type;
+     int profile;
+#define FF_PROFILE_UNKNOWN -99
+#define FF_PROFILE_RESERVED -100
+
+#define FF_PROFILE_AAC_MAIN 0
+#define FF_PROFILE_AAC_LOW  1
+#define FF_PROFILE_AAC_SSR  2
+#define FF_PROFILE_AAC_LTP  3
+
+#define FF_PROFILE_DTS         20
+#define FF_PROFILE_DTS_ES      30
+#define FF_PROFILE_DTS_96_24   40
+#define FF_PROFILE_DTS_HD_HRA  50
+#define FF_PROFILE_DTS_HD_MA   60
+
+#define FF_PROFILE_MPEG2_422    0
+#define FF_PROFILE_MPEG2_HIGH   1
+#define FF_PROFILE_MPEG2_SS     2
+#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
+#define FF_PROFILE_MPEG2_MAIN   4
+#define FF_PROFILE_MPEG2_SIMPLE 5
+
+#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
+#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
+
+#define FF_PROFILE_H264_BASELINE             66
+#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
+#define FF_PROFILE_H264_MAIN                 77
+#define FF_PROFILE_H264_EXTENDED             88
+#define FF_PROFILE_H264_HIGH                 100
+#define FF_PROFILE_H264_HIGH_10              110
+#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
+#define FF_PROFILE_H264_HIGH_422             122
+#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
+#define FF_PROFILE_H264_HIGH_444             144
+#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
+#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
+#define FF_PROFILE_H264_CAVLC_444            44
+
+#define FF_PROFILE_VC1_SIMPLE   0
+#define FF_PROFILE_VC1_MAIN     1
+#define FF_PROFILE_VC1_COMPLEX  2
+#define FF_PROFILE_VC1_ADVANCED 3
+
+#define FF_PROFILE_MPEG4_SIMPLE                     0
+#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE            1
+#define FF_PROFILE_MPEG4_CORE                       2
+#define FF_PROFILE_MPEG4_MAIN                       3
+#define FF_PROFILE_MPEG4_N_BIT                      4
+#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE           5
+#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION      6
+#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE     7
+#define FF_PROFILE_MPEG4_HYBRID                     8
+#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME         9
+#define FF_PROFILE_MPEG4_CORE_SCALABLE             10
+#define FF_PROFILE_MPEG4_ADVANCED_CODING           11
+#define FF_PROFILE_MPEG4_ADVANCED_CORE             12
+#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
+#define FF_PROFILE_MPEG4_SIMPLE_STUDIO             14
+#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE           15
 
     /**
-     * Used to request a sample format from the decoder.
-     * - encoding: unused.
+     * level
+     * - encoding: Set by user.
+     * - decoding: Set by libavcodec.
+     */
+     int level;
+#define FF_LEVEL_UNKNOWN -99
+
+    /**
+     *
+     * - encoding: unused
      * - decoding: Set by user.
      */
-    enum AVSampleFormat request_sample_fmt;
+    enum AVDiscard skip_loop_filter;
 
     /**
-     * Error recognition; may misdetect some more or less valid parts as errors.
+     *
      * - encoding: unused
      * - decoding: Set by user.
      */
-    int err_recognition;
-#define AV_EF_CRCCHECK  (1<<0)
-#define AV_EF_BITSTREAM (1<<1)
-#define AV_EF_BUFFER    (1<<2)
-#define AV_EF_EXPLODE   (1<<3)
+    enum AVDiscard skip_idct;
 
     /**
-     * Private context used for internal data.
      *
-     * Unlike priv_data, this is not codec-specific. It is used in general
-     * libavcodec functions.
+     * - encoding: unused
+     * - decoding: Set by user.
      */
-    struct AVCodecInternal *internal;
+    enum AVDiscard skip_frame;
 
-    /** Field order
-     * - encoding: set by libavcodec
-     * - decoding: Set by libavcodec
+    /**
+     * Header containing style information for text subtitles.
+     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
+     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
+     * the Format line following. It shouldn't include any Dialogue line.
+     * - encoding: Set/allocated/freed by user (before avcodec_open2())
+     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
      */
-    enum AVFieldOrder field_order;
+    uint8_t *subtitle_header;
+    int subtitle_header_size;
+
+    /**
+     * Simulates errors in the bitstream to test error concealment.
+     * - encoding: Set by user.
+     * - decoding: unused
+     */
+    int error_rate;
+
+    /**
+     * Current packet as passed into the decoder, to avoid having
+     * to pass the packet into every function. Currently only valid
+     * inside lavc and get/release_buffer callbacks.
+     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
+     * - encoding: unused
+     */
+    AVPacket *pkt;
+
+    /**
+     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
+     * Used for compliant TS muxing.
+     * - encoding: Set by libavcodec.
+     * - decoding: unused.
+     */
+    uint64_t vbv_delay;
 } AVCodecContext;
 
 /**
diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index a4e3081272..f17f34e8e1 100644
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -465,7 +465,7 @@ static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
     dst->slice_flags = src->slice_flags;
     dst->flags2      = src->flags2;
 
-    copy_fields(skip_loop_filter, bidir_refine);
+    copy_fields(skip_loop_filter, subtitle_header);
 
     dst->frame_number     = src->frame_number;
     dst->reordered_opaque = src->reordered_opaque;