Start working on a branch where FFmpeg is not copied, patched and carved to be built with automake but instead imported inline and built using its own build system. This is an import of a slightly modified FFmpeg current tree. xine-lib builds, install and run fine with it, but there are of course plenty of things that needs to be fixed before it can even be considered for a 1.2.x series. Work will continue in the next days of course.

CVS patchset: 8397
CVS date: 2006/12/02 01:19:48

1 files changed, 2707 insertions, 0 deletions

diff --git a/contrib/ffmpeg/libavcodec/avcodec.h b/contrib/ffmpeg/libavcodec/avcodec.h
new file mode 100644
index 000000000..da063b562
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/avcodec.h
@@ -0,0 +1,2707 @@
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef AVCODEC_H
+#define AVCODEC_H
+
+/**
+ * @file avcodec.h
+ * external api header.
+ */
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "avutil.h"
+#include <sys/types.h> /* size_t */
+
+#define AV_STRINGIFY(s)         AV_TOSTRING(s)
+#define AV_TOSTRING(s) #s
+
+#define LIBAVCODEC_VERSION_INT  ((51<<16)+(25<<8)+0)
+#define LIBAVCODEC_VERSION      51.25.0
+#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
+
+#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
+
+#define AV_NOPTS_VALUE          int64_t_C(0x8000000000000000)
+#define AV_TIME_BASE            1000000
+#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
+
+enum CodecID {
+    CODEC_ID_NONE,
+    CODEC_ID_MPEG1VIDEO,
+    CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
+    CODEC_ID_MPEG2VIDEO_XVMC,
+    CODEC_ID_H261,
+    CODEC_ID_H263,
+    CODEC_ID_RV10,
+    CODEC_ID_RV20,
+    CODEC_ID_MJPEG,
+    CODEC_ID_MJPEGB,
+    CODEC_ID_LJPEG,
+    CODEC_ID_SP5X,
+    CODEC_ID_JPEGLS,
+    CODEC_ID_MPEG4,
+    CODEC_ID_RAWVIDEO,
+    CODEC_ID_MSMPEG4V1,
+    CODEC_ID_MSMPEG4V2,
+    CODEC_ID_MSMPEG4V3,
+    CODEC_ID_WMV1,
+    CODEC_ID_WMV2,
+    CODEC_ID_H263P,
+    CODEC_ID_H263I,
+    CODEC_ID_FLV1,
+    CODEC_ID_SVQ1,
+    CODEC_ID_SVQ3,
+    CODEC_ID_DVVIDEO,
+    CODEC_ID_HUFFYUV,
+    CODEC_ID_CYUV,
+    CODEC_ID_H264,
+    CODEC_ID_INDEO3,
+    CODEC_ID_VP3,
+    CODEC_ID_THEORA,
+    CODEC_ID_ASV1,
+    CODEC_ID_ASV2,
+    CODEC_ID_FFV1,
+    CODEC_ID_4XM,
+    CODEC_ID_VCR1,
+    CODEC_ID_CLJR,
+    CODEC_ID_MDEC,
+    CODEC_ID_ROQ,
+    CODEC_ID_INTERPLAY_VIDEO,
+    CODEC_ID_XAN_WC3,
+    CODEC_ID_XAN_WC4,
+    CODEC_ID_RPZA,
+    CODEC_ID_CINEPAK,
+    CODEC_ID_WS_VQA,
+    CODEC_ID_MSRLE,
+    CODEC_ID_MSVIDEO1,
+    CODEC_ID_IDCIN,
+    CODEC_ID_8BPS,
+    CODEC_ID_SMC,
+    CODEC_ID_FLIC,
+    CODEC_ID_TRUEMOTION1,
+    CODEC_ID_VMDVIDEO,
+    CODEC_ID_MSZH,
+    CODEC_ID_ZLIB,
+    CODEC_ID_QTRLE,
+    CODEC_ID_SNOW,
+    CODEC_ID_TSCC,
+    CODEC_ID_ULTI,
+    CODEC_ID_QDRAW,
+    CODEC_ID_VIXL,
+    CODEC_ID_QPEG,
+    CODEC_ID_XVID,
+    CODEC_ID_PNG,
+    CODEC_ID_PPM,
+    CODEC_ID_PBM,
+    CODEC_ID_PGM,
+    CODEC_ID_PGMYUV,
+    CODEC_ID_PAM,
+    CODEC_ID_FFVHUFF,
+    CODEC_ID_RV30,
+    CODEC_ID_RV40,
+    CODEC_ID_VC1,
+    CODEC_ID_WMV3,
+    CODEC_ID_LOCO,
+    CODEC_ID_WNV1,
+    CODEC_ID_AASC,
+    CODEC_ID_INDEO2,
+    CODEC_ID_FRAPS,
+    CODEC_ID_TRUEMOTION2,
+    CODEC_ID_BMP,
+    CODEC_ID_CSCD,
+    CODEC_ID_MMVIDEO,
+    CODEC_ID_ZMBV,
+    CODEC_ID_AVS,
+    CODEC_ID_SMACKVIDEO,
+    CODEC_ID_NUV,
+    CODEC_ID_KMVC,
+    CODEC_ID_FLASHSV,
+    CODEC_ID_CAVS,
+    CODEC_ID_JPEG2000,
+    CODEC_ID_VMNC,
+    CODEC_ID_VP5,
+    CODEC_ID_VP6,
+    CODEC_ID_VP6F,
+    CODEC_ID_TARGA,
+    CODEC_ID_DSICINVIDEO,
+    CODEC_ID_TIERTEXSEQVIDEO,
+    CODEC_ID_TIFF,
+    CODEC_ID_GIF,
+
+    /* various pcm "codecs" */
+    CODEC_ID_PCM_S16LE= 0x10000,
+    CODEC_ID_PCM_S16BE,
+    CODEC_ID_PCM_U16LE,
+    CODEC_ID_PCM_U16BE,
+    CODEC_ID_PCM_S8,
+    CODEC_ID_PCM_U8,
+    CODEC_ID_PCM_MULAW,
+    CODEC_ID_PCM_ALAW,
+    CODEC_ID_PCM_S32LE,
+    CODEC_ID_PCM_S32BE,
+    CODEC_ID_PCM_U32LE,
+    CODEC_ID_PCM_U32BE,
+    CODEC_ID_PCM_S24LE,
+    CODEC_ID_PCM_S24BE,
+    CODEC_ID_PCM_U24LE,
+    CODEC_ID_PCM_U24BE,
+    CODEC_ID_PCM_S24DAUD,
+
+    /* various adpcm codecs */
+    CODEC_ID_ADPCM_IMA_QT= 0x11000,
+    CODEC_ID_ADPCM_IMA_WAV,
+    CODEC_ID_ADPCM_IMA_DK3,
+    CODEC_ID_ADPCM_IMA_DK4,
+    CODEC_ID_ADPCM_IMA_WS,
+    CODEC_ID_ADPCM_IMA_SMJPEG,
+    CODEC_ID_ADPCM_MS,
+    CODEC_ID_ADPCM_4XM,
+    CODEC_ID_ADPCM_XA,
+    CODEC_ID_ADPCM_ADX,
+    CODEC_ID_ADPCM_EA,
+    CODEC_ID_ADPCM_G726,
+    CODEC_ID_ADPCM_CT,
+    CODEC_ID_ADPCM_SWF,
+    CODEC_ID_ADPCM_YAMAHA,
+    CODEC_ID_ADPCM_SBPRO_4,
+    CODEC_ID_ADPCM_SBPRO_3,
+    CODEC_ID_ADPCM_SBPRO_2,
+
+    /* AMR */
+    CODEC_ID_AMR_NB= 0x12000,
+    CODEC_ID_AMR_WB,
+
+    /* RealAudio codecs*/
+    CODEC_ID_RA_144= 0x13000,
+    CODEC_ID_RA_288,
+
+    /* various DPCM codecs */
+    CODEC_ID_ROQ_DPCM= 0x14000,
+    CODEC_ID_INTERPLAY_DPCM,
+    CODEC_ID_XAN_DPCM,
+    CODEC_ID_SOL_DPCM,
+
+    CODEC_ID_MP2= 0x15000,
+    CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
+    CODEC_ID_AAC,
+#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
+    CODEC_ID_MPEG4AAC,
+#endif
+    CODEC_ID_AC3,
+    CODEC_ID_DTS,
+    CODEC_ID_VORBIS,
+    CODEC_ID_DVAUDIO,
+    CODEC_ID_WMAV1,
+    CODEC_ID_WMAV2,
+    CODEC_ID_MACE3,
+    CODEC_ID_MACE6,
+    CODEC_ID_VMDAUDIO,
+    CODEC_ID_SONIC,
+    CODEC_ID_SONIC_LS,
+    CODEC_ID_FLAC,
+    CODEC_ID_MP3ADU,
+    CODEC_ID_MP3ON4,
+    CODEC_ID_SHORTEN,
+    CODEC_ID_ALAC,
+    CODEC_ID_WESTWOOD_SND1,
+    CODEC_ID_GSM,
+    CODEC_ID_QDM2,
+    CODEC_ID_COOK,
+    CODEC_ID_TRUESPEECH,
+    CODEC_ID_TTA,
+    CODEC_ID_SMACKAUDIO,
+    CODEC_ID_QCELP,
+    CODEC_ID_WAVPACK,
+    CODEC_ID_DSICINAUDIO,
+    CODEC_ID_IMC,
+
+    /* subtitle codecs */
+    CODEC_ID_DVD_SUBTITLE= 0x17000,
+    CODEC_ID_DVB_SUBTITLE,
+
+    CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
+                         stream (only used by libavformat) */
+};
+
+/* CODEC_ID_MP3LAME is absolete */
+#define CODEC_ID_MP3LAME CODEC_ID_MP3
+
+enum CodecType {
+    CODEC_TYPE_UNKNOWN = -1,
+    CODEC_TYPE_VIDEO,
+    CODEC_TYPE_AUDIO,
+    CODEC_TYPE_DATA,
+    CODEC_TYPE_SUBTITLE,
+};
+
+/* currently unused, may be used if 24/32 bits samples ever supported */
+/* all in native endian */
+enum SampleFormat {
+    SAMPLE_FMT_NONE = -1,
+    SAMPLE_FMT_U8,              ///< unsigned 8 bits
+    SAMPLE_FMT_S16,             ///< signed 16 bits
+    SAMPLE_FMT_S24,             ///< signed 24 bits
+    SAMPLE_FMT_S32,             ///< signed 32 bits
+    SAMPLE_FMT_FLT,             ///< float
+};
+
+/* in bytes */
+#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
+
+/**
+ * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
+ * this is mainly needed because some optimized bitstream readers read
+ * 32 or 64 bit at once and could read over the end<br>
+ * Note, if the first 23 bits of the additional bytes are not 0 then damaged
+ * MPEG bitstreams could cause overread and segfault
+ */
+#define FF_INPUT_BUFFER_PADDING_SIZE 8
+
+/**
+ * minimum encoding buffer size.
+ * used to avoid some checks during header writing
+ */
+#define FF_MIN_BUFFER_SIZE 16384
+
+/* motion estimation type, EPZS by default */
+enum Motion_Est_ID {
+    ME_ZERO = 1,
+    ME_FULL,
+    ME_LOG,
+    ME_PHODS,
+    ME_EPZS,
+    ME_X1,
+    ME_HEX,
+    ME_UMH,
+    ME_ITER,
+};
+
+enum AVDiscard{
+//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
+    AVDISCARD_NONE   =-16, ///< discard nothing
+    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
+    AVDISCARD_NONREF =  8, ///< discard all non reference
+    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
+    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
+    AVDISCARD_ALL    = 48, ///< discard all
+};
+
+typedef struct RcOverride{
+    int start_frame;
+    int end_frame;
+    int qscale; // if this is 0 then quality_factor will be used instead
+    float quality_factor;
+} RcOverride;
+
+#define FF_MAX_B_FRAMES 16
+
+/* encoding support
+   these flags can be passed in AVCodecContext.flags before initing
+   Note: not everything is supported yet.
+*/
+
+#define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
+#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / Advanced prediction for H263
+#define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
+#define CODEC_FLAG_GMC    0x0020  ///< use GMC
+#define CODEC_FLAG_MV0    0x0040  ///< always try a MB with MV=<0,0>
+#define CODEC_FLAG_PART   0x0080  ///< use data partitioning
+/* parent program gurantees that the input for b-frame containing streams is not written to
+   for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
+#define CODEC_FLAG_INPUT_PRESERVED 0x0100
+#define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
+#define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
+#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
+#define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
+#define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
+#define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
+#define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
+                                            of only at frame boundaries */
+#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
+#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
+#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
+#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
+#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
+#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
+#define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
+/* Fx : Flag for h263+ extra options */
+#define CODEC_FLAG_H263P_AIC      0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
+#define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
+#define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
+#define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
+#define CODEC_FLAG_QP_RD          0x08000000 ///< use rate distortion optimization for qp selectioon
+#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H263 Alternative inter vlc
+#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
+#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
+#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
+#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
+#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
+#define CODEC_FLAG_CLOSED_GOP     ((int)0x80000000)
+#define CODEC_FLAG2_FAST          0x00000001 ///< allow non spec compliant speedup tricks
+#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< strictly enforce GOP size
+#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< skip bitstream encoding
+#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< place global headers at every keyframe instead of in extradata
+#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow b-frames to be used as references
+#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for b-frames
+#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 multiple references per partition
+#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
+#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
+#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
+#define CODEC_FLAG2_BRDO          0x00000400 ///< b-frame rate-distortion optimization
+#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< use MPEG-2 intra VLC table
+#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
+#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format
+
+/* Unsupported options :
+ *              Syntax Arithmetic coding (SAC)
+ *              Reference Picture Selection
+ *              Independant Segment Decoding */
+/* /Fx */
+/* codec capabilities */
+
+#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
+/**
+ * Codec uses get_buffer() for allocating buffers.
+ * direct rendering method 1
+ */
+#define CODEC_CAP_DR1             0x0002
+/* if 'parse_only' field is true, then avcodec_parse_frame() can be
+   used */
+#define CODEC_CAP_PARSE_ONLY      0x0004
+#define CODEC_CAP_TRUNCATED       0x0008
+/* codec can export data for HW decoding (XvMC) */
+#define CODEC_CAP_HWACCEL         0x0010
+/**
+ * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
+ * if this is not set, the codec is guranteed to never be feeded with NULL data
+ */
+#define CODEC_CAP_DELAY           0x0020
+/**
+ * Codec can be fed a final frame with a smaller size.
+ * This can be used to prevent truncation of the last audio samples.
+ */
+#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
+
+//the following defines may change, don't expect compatibility if you use them
+#define MB_TYPE_INTRA4x4   0x0001
+#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
+#define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
+#define MB_TYPE_16x16      0x0008
+#define MB_TYPE_16x8       0x0010
+#define MB_TYPE_8x16       0x0020
+#define MB_TYPE_8x8        0x0040
+#define MB_TYPE_INTERLACED 0x0080
+#define MB_TYPE_DIRECT2     0x0100 //FIXME
+#define MB_TYPE_ACPRED     0x0200
+#define MB_TYPE_GMC        0x0400
+#define MB_TYPE_SKIP       0x0800
+#define MB_TYPE_P0L0       0x1000
+#define MB_TYPE_P1L0       0x2000
+#define MB_TYPE_P0L1       0x4000
+#define MB_TYPE_P1L1       0x8000
+#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
+#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
+#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
+#define MB_TYPE_QUANT      0x00010000
+#define MB_TYPE_CBP        0x00020000
+//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
+
+/**
+ * Pan Scan area.
+ * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
+ */
+typedef struct AVPanScan{
+    /**
+     * id.
+     * - encoding: set by user.
+     * - decoding: set by lavc
+     */
+    int id;
+
+    /**
+     * width and height in 1/16 pel
+     * - encoding: set by user.
+     * - decoding: set by lavc
+     */
+    int width;
+    int height;
+
+    /**
+     * position of the top left corner in 1/16 pel for up to 3 fields/frames.
+     * - encoding: set by user.
+     * - decoding: set by lavc
+     */
+    int16_t position[3][2];
+}AVPanScan;
+
+#define FF_COMMON_FRAME \
+    /**\
+     * pointer to the picture planes.\
+     * this might be different from the first allocated byte\
+     * - encoding: \
+     * - decoding: \
+     */\
+    uint8_t *data[4];\
+    int linesize[4];\
+    /**\
+     * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
+     * this isn't used by lavc unless the default get/release_buffer() is used\
+     * - encoding: \
+     * - decoding: \
+     */\
+    uint8_t *base[4];\
+    /**\
+     * 1 -> keyframe, 0-> not\
+     * - encoding: set by lavc\
+     * - decoding: set by lavc\
+     */\
+    int key_frame;\
+\
+    /**\
+     * picture type of the frame, see ?_TYPE below.\
+     * - encoding: set by lavc for coded_picture (and set by user for input)\
+     * - decoding: set by lavc\
+     */\
+    int pict_type;\
+\
+    /**\
+     * presentation timestamp in time_base units (time when frame should be shown to user)\
+     * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
+     * - encoding: MUST be set by user\
+     * - decoding: set by lavc\
+     */\
+    int64_t pts;\
+\
+    /**\
+     * picture number in bitstream order.\
+     * - encoding: set by\
+     * - decoding: set by lavc\
+     */\
+    int coded_picture_number;\
+    /**\
+     * picture number in display order.\
+     * - encoding: set by\
+     * - decoding: set by lavc\
+     */\
+    int display_picture_number;\
+\
+    /**\
+     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
+     * - encoding: set by lavc for coded_picture (and set by user for input)\
+     * - decoding: set by lavc\
+     */\
+    int quality; \
+\
+    /**\
+     * buffer age (1->was last buffer and dint change, 2->..., ...).\
+     * set to INT_MAX if the buffer has not been used yet \
+     * - encoding: unused\
+     * - decoding: MUST be set by get_buffer()\
+     */\
+    int age;\
+\
+    /**\
+     * is this picture used as reference\
+     * - encoding: unused\
+     * - decoding: set by lavc (before get_buffer() call))\
+     */\
+    int reference;\
+\
+    /**\
+     * QP table\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    int8_t *qscale_table;\
+    /**\
+     * QP store stride\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    int qstride;\
+\
+    /**\
+     * mbskip_table[mb]>=1 if MB didnt change\
+     * stride= mb_width = (width+15)>>4\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    uint8_t *mbskip_table;\
+\
+    /**\
+     * Motion vector table.\
+     * @code\
+     * example:\
+     * int mv_sample_log2= 4 - motion_subsample_log2;\
+     * int mb_width= (width+15)>>4;\
+     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
+     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
+     * @endcode\
+     * - encoding: set by user\
+     * - decoding: set by lavc\
+     */\
+    int16_t (*motion_val[2])[2];\
+\
+    /**\
+     * Macroblock type table\
+     * mb_type_base + mb_width + 2\
+     * - encoding: set by user\
+     * - decoding: set by lavc\
+     */\
+    uint32_t *mb_type;\
+\
+    /**\
+     * log2 of the size of the block which a single vector in motion_val represents: \
+     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    uint8_t motion_subsample_log2;\
+\
+    /**\
+     * for some private data of the user\
+     * - encoding: unused\
+     * - decoding: set by user\
+     */\
+    void *opaque;\
+\
+    /**\
+     * error\
+     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
+     * - decoding: unused\
+     */\
+    uint64_t error[4];\
+\
+    /**\
+     * type of the buffer (to keep track of who has to dealloc data[*])\
+     * - encoding: set by the one who allocs it\
+     * - decoding: set by the one who allocs it\
+     * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
+     */\
+    int type;\
+    \
+    /**\
+     * when decoding, this signal how much the picture must be delayed.\
+     * extra_delay = repeat_pict / (2*fps)\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    int repeat_pict;\
+    \
+    /**\
+     * \
+     */\
+    int qscale_type;\
+    \
+    /**\
+     * The content of the picture is interlaced.\
+     * - encoding: set by user\
+     * - decoding: set by lavc (default 0)\
+     */\
+    int interlaced_frame;\
+    \
+    /**\
+     * if the content is interlaced, is top field displayed first.\
+     * - encoding: set by user\
+     * - decoding: set by lavc\
+     */\
+    int top_field_first;\
+    \
+    /**\
+     * Pan scan.\
+     * - encoding: set by user\
+     * - decoding: set by lavc\
+     */\
+    AVPanScan *pan_scan;\
+    \
+    /**\
+     * tell user application that palette has changed from previous frame.\
+     * - encoding: ??? (no palette-enabled encoder yet)\
+     * - decoding: set by lavc (default 0)\
+     */\
+    int palette_has_changed;\
+    \
+    /**\
+     * Codec suggestion on buffer type if != 0\
+     * - encoding: unused\
+     * - decoding: set by lavc (before get_buffer() call))\
+     */\
+    int buffer_hints;\
+\
+    /**\
+     * DCT coeffitients\
+     * - encoding: unused\
+     * - decoding: set by lavc\
+     */\
+    short *dct_coeff;\
+\
+    /**\
+     * Motion referece frame index\
+     * - encoding: set by user\
+     * - decoding: set by lavc\
+     */\
+    int8_t *ref_index[2];
+
+#define FF_QSCALE_TYPE_MPEG1 0
+#define FF_QSCALE_TYPE_MPEG2 1
+#define FF_QSCALE_TYPE_H264  2
+
+#define FF_BUFFER_TYPE_INTERNAL 1
+#define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
+#define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
+#define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, don't dealloc anything
+
+
+#define FF_I_TYPE 1 // Intra
+#define FF_P_TYPE 2 // Predicted
+#define FF_B_TYPE 3 // Bi-dir predicted
+#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
+#define FF_SI_TYPE 5
+#define FF_SP_TYPE 6
+
+#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
+#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
+#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
+#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
+
+/**
+ * Audio Video Frame.
+ */
+typedef struct AVFrame {
+    FF_COMMON_FRAME
+} AVFrame;
+
+#define DEFAULT_FRAME_RATE_BASE 1001000
+
+/**
+ * main external api structure.
+ */
+typedef struct AVCodecContext {
+    /**
+     * Info on struct for av_log
+     * - set by avcodec_alloc_context
+     */
+    AVClass *av_class;
+    /**
+     * the average bitrate.
+     * - encoding: set by user. unused for constant quantizer encoding
+     * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
+     */
+    int bit_rate;
+
+    /**
+     * number of bits the bitstream is allowed to diverge from the reference.
+     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
+     * - encoding: set by user. unused for constant quantizer encoding
+     * - decoding: unused
+     */
+    int bit_rate_tolerance;
+
+    /**
+     * CODEC_FLAG_*.
+     * - encoding: set by user.
+     * - decoding: set by user.
+     */
+    int flags;
+
+    /**
+     * some codecs needs additionnal format info. It is stored here
+     * - encoding: set by user.
+     * - decoding: set by lavc. (FIXME is this ok?)
+     */
+    int sub_id;
+
+    /**
+     * 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) [7, 8 are x264 specific, 9 is snow specific]
+     * - encoding: MUST be set by user.
+     * - decoding: unused
+     */
+    int me_method;
+
+    /**
+     * some codecs need / can use extra-data like huffman tables.
+     * mjpeg: huffman tables
+     * rv10: additional flags
+     * mpeg4: global headers (they can be in the bitstream or here)
+     * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
+     * then extradata_size to avoid prolems if its read with the bitstream reader
+     * the bytewise contents of extradata must not depend on the architecture or cpu endianness
+     * - encoding: set/allocated/freed by lavc.
+     * - decoding: set/allocated/freed by user.
+     */
+    uint8_t *extradata;
+    int extradata_size;
+
+    /**
+     * this is the fundamental unit of time (in seconds) in terms
+     * of which frame timestamps are represented. for fixed-fps content,
+     * timebase should be 1/framerate and timestamp increments should be
+     * identically 1.
+     * - encoding: MUST be set by user
+     * - decoding: set by lavc.
+     */
+    AVRational time_base;
+
+    /* video only */
+    /**
+     * picture width / height.
+     * - encoding: MUST be set by user.
+     * - decoding: set by lavc.
+     * Note, for compatibility its possible to set this instead of
+     * coded_width/height before decoding
+     */
+    int width, height;
+
+#define FF_ASPECT_EXTENDED 15
+
+    /**
+     * the number of pictures in a group of pitures, or 0 for intra_only.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int gop_size;
+
+    /**
+     * pixel format, see PIX_FMT_xxx.
+     * - encoding: set by user.
+     * - decoding: set by lavc.
+     */
+    enum PixelFormat pix_fmt;
+
+    /**
+     * Frame rate emulation. If not zero lower layer (i.e. format handler)
+     * has to read frames at native frame rate.
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int rate_emu;
+
+    /**
+     * if non NULL, 'draw_horiz_band' is called by the libavcodec
+     * decoder to draw an horizontal band. It improve cache usage. Not
+     * all codecs can do that. You must check the codec capabilities
+     * before
+     * - encoding: unused
+     * - decoding: set by user.
+     * @param height the height of the slice
+     * @param y the y position of the slice
+     * @param type 1->top field, 2->bottom field, 3->frame
+     * @param offset offset into the AVFrame.data from which the slice should be read
+     */
+    void (*draw_horiz_band)(struct AVCodecContext *s,
+                            const AVFrame *src, int offset[4],
+                            int y, int type, int height);
+
+    /* audio only */
+    int sample_rate; ///< samples per sec
+    int channels;
+
+    /**
+     * audio sample format.
+     * - encoding: set by user.
+     * - decoding: set by lavc.
+     */
+    enum SampleFormat sample_fmt;  ///< sample format, currenly unused
+
+    /* 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
+    int real_pict_num;  ///< returns the real picture number of previous encoded frame
+
+    /**
+     * number of frames the decoded output will be delayed relative to
+     * the encoded input.
+     * - encoding: set by lavc.
+     * - 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 etween frames.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int max_qdiff;
+
+    /**
+     * maximum number of b frames between non b frames.
+     * note: the output will be delayed by max_b_frames+1 relative to the input
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int max_b_frames;
+
+    /**
+     * qscale factor between ip and b frames.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    float b_quant_factor;
+
+    /** obsolete FIXME remove */
+    int rc_strategy;
+#define FF_RC_STRATEGY_XVID 1
+
+    int b_frame_strategy;
+
+    /**
+     * hurry up amount.
+     * deprecated in favor of skip_idct and skip_frame
+     * - encoding: unused
+     * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
+     */
+    int hurry_up;
+
+    struct AVCodec *codec;
+
+    void *priv_data;
+
+    /* unused, FIXME remove*/
+    int rtp_mode;
+
+    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
+                            /* do it's 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 transmited RTP payload    */
+
+
+    /* The RTP callback: This function is called   */
+    /* every time the encoder has a packet to send */
+    /* 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 lavc
+     * - 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 CodecType codec_type; /* see CODEC_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 workaround some encoder bugs
+     * - encoding: set by user, if not then the default based on codec_id will be used
+     * - decoding: set by user, will be converted to upper case by lavc during init
+     */
+    unsigned int codec_tag;
+
+    /**
+     * workaround 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 ///< workaround various bugs in microsofts broken decoders
+//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
+
+    /**
+     * luma single coeff elimination threshold.
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int luma_elim_threshold;
+
+    /**
+     * chroma single coeff elimination threshold.
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int chroma_elim_threshold;
+
+    /**
+     * strictly follow the std (MPEG4, ...).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int strict_std_compliance;
+#define FF_COMPLIANCE_VERY_STRICT   2 ///< strictly conform to a 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_INOFFICIAL   -1 ///< allow inofficial extensions
+#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
+
+    /**
+     * qscale offset between ip and b 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)
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    float b_quant_offset;
+
+    /**
+     * error resilience higher values will detect more errors but may missdetect
+     * some more or less valid parts as errors.
+     * - encoding: unused
+     * - decoding: set by user
+     */
+    int error_resilience;
+#define FF_ER_CAREFUL         1
+#define FF_ER_COMPLIANT       2
+#define FF_ER_AGGRESSIVE      3
+#define FF_ER_VERY_AGGRESSIVE 4
+
+    /**
+     * called at the beginning of each frame to get a buffer for it.
+     * if pic.reference is set then the frame will be read later by lavc
+     * avcodec_align_dimensions() should be used to find the required width and
+     * height, as they normally need to be rounded up to the next multiple of 16
+     * - encoding: unused
+     * - decoding: set by lavc, user can override
+     */
+    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+    /**
+     * called to release buffers which where allocated with get_buffer.
+     * a released buffer can be reused in get_buffer()
+     * pic.data[*] must be set to NULL
+     * - encoding: unused
+     * - decoding: set by lavc, user can override
+     */
+    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+    /**
+     * if 1 the stream has a 1 frame delay during decoding.
+     * - encoding: set by lavc
+     * - decoding: set by lavc
+     */
+    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;
+
+    int parse_only; /* - decoding only: if true, only parsing is done
+                       (function avcodec_parse_frame()). The frame
+                       data is returned. Only MPEG codecs support this now. */
+
+    /**
+     * 0-> h263 quant 1-> mpeg quant.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int mpeg_quant;
+
+    /**
+     * pass1 encoding statistics output buffer.
+     * - encoding: set by lavc
+     * - 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
+     */
+    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)
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    float i_quant_factor;
+
+    /**
+     * qscale offset between p and i frames.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    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_MLIB    4
+#define FF_DCT_ALTIVEC 5
+#define FF_DCT_FAAN    6
+
+    /**
+     * luminance masking (0-> disabled).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    float lumi_masking;
+
+    /**
+     * temporary complexity masking (0-> disabled).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    float temporal_cplx_masking;
+
+    /**
+     * spatial complexity masking (0-> disabled).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    float spatial_cplx_masking;
+
+    /**
+     * p block masking (0-> disabled).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    float p_masking;
+
+    /**
+     * darkness masking (0-> disabled).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    float dark_masking;
+
+
+    /* for binary compatibility */
+    int unused;
+
+    /**
+     * 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_PS2          5
+#define FF_IDCT_MLIB         6
+#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
+
+    /**
+     * slice count.
+     * - encoding: set by lavc
+     * - decoding: set by user (or 0)
+     */
+    int slice_count;
+    /**
+     * slice offsets in the frame in bytes.
+     * - encoding: set/allocated by lavc
+     * - 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 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;
+#define FF_MM_FORCE    0x80000000 /* force usage of selected flags (OR) */
+    /* lower 16 bits - CPU features */
+#ifdef HAVE_MMX
+#define FF_MM_MMX      0x0001 /* standard MMX */
+#define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
+#define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
+#define FF_MM_SSE      0x0008 /* SSE functions */
+#define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
+#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
+#endif /* HAVE_MMX */
+#ifdef HAVE_IWMMXT
+#define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
+#endif /* HAVE_IWMMXT */
+
+    /**
+     * bits per sample/pixel from the demuxer (needed for huffyuv).
+     * - encoding: set by lavc
+     * - decoding: set by user
+     */
+     int bits_per_sample;
+
+    /**
+     * prediction method (needed for huffyuv).
+     * - encoding: set by user
+     * - decoding: unused
+     */
+     int prediction_method;
+#define FF_PRED_LEFT   0
+#define FF_PRED_PLANE  1
+#define FF_PRED_MEDIAN 2
+
+    /**
+     * sample aspect ratio (0 if unknown).
+     * numerator and denominator must be relative prime and smaller then 256 for some video standards
+     * - encoding: set by user.
+     * - decoding: set by lavc.
+     */
+    AVRational sample_aspect_ratio;
+
+    /**
+     * the picture in the bitstream.
+     * - encoding: set by lavc
+     * - decoding: set by lavc
+     */
+    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
+
+    /**
+     * 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 lavc if flags&CODEC_FLAG_PSNR
+     * - decoding: unused
+     */
+    uint64_t error[4];
+
+    /**
+     * minimum MB quantizer.
+     * - encoding: unused
+     * - decoding: unused
+     */
+    int mb_qmin;
+
+    /**
+     * maximum MB quantizer.
+     * - encoding: unused
+     * - decoding: unused
+     */
+    int mb_qmax;
+
+    /**
+     * motion estimation compare function.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int me_cmp;
+    /**
+     * subpixel motion estimation compare function.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int me_sub_cmp;
+    /**
+     * macroblock compare function (not supported yet).
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int mb_cmp;
+    /**
+     * interlaced dct compare function
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int ildct_cmp;
+#define FF_CMP_SAD  0
+#define FF_CMP_SSE  1
+#define FF_CMP_SATD 2
+#define FF_CMP_DCT  3
+#define FF_CMP_PSNR 4
+#define FF_CMP_BIT  5
+#define FF_CMP_RD   6
+#define FF_CMP_ZERO 7
+#define FF_CMP_VSAD 8
+#define FF_CMP_VSSE 9
+#define FF_CMP_NSSE 10
+#define FF_CMP_W53  11
+#define FF_CMP_W97  12
+#define FF_CMP_DCTMAX 13
+#define FF_CMP_DCT264 14
+#define FF_CMP_CHROMA 256
+
+    /**
+     * ME diamond size & shape.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int dia_size;
+
+    /**
+     * amount of previous MV predictors (2a+1 x 2a+1 square).
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int last_predictor_count;
+
+    /**
+     * pre pass for motion estimation.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int pre_me;
+
+    /**
+     * motion estimation pre pass compare function.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int me_pre_cmp;
+
+    /**
+     * ME pre pass diamond size & shape.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int pre_dia_size;
+
+    /**
+     * subpel ME quality.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int me_subpel_quality;
+
+    /**
+     * callback to negotiate the pixelFormat.
+     * @param fmt is the list of formats which are supported by the codec,
+     * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
+     * the first is allways the native one
+     * @return the choosen format
+     * - encoding: unused
+     * - decoding: set by user, if not set then the native format will always be choosen
+     */
+    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
+
+    /**
+     * DTG active format information (additionnal aspect ratio
+     * information only used in DVB MPEG2 transport streams). 0 if
+     * not set.
+     *
+     * - encoding: unused.
+     * - decoding: set by decoder
+     */
+    int dtg_active_format;
+#define FF_DTG_AFD_SAME         8
+#define FF_DTG_AFD_4_3          9
+#define FF_DTG_AFD_16_9         10
+#define FF_DTG_AFD_14_9         11
+#define FF_DTG_AFD_4_3_SP_14_9  13
+#define FF_DTG_AFD_16_9_SP_14_9 14
+#define FF_DTG_AFD_SP_4_3       15
+
+    /**
+     * Maximum motion estimation search range in subpel units.
+     * if 0 then no limit
+     *
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int me_range;
+
+    /**
+     * intra quantizer bias.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int intra_quant_bias;
+#define FF_DEFAULT_QUANT_BIAS 999999
+
+    /**
+     * inter quantizer bias.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int inter_quant_bias;
+
+    /**
+     * color table ID.
+     * - encoding: unused.
+     * - decoding: which clrtable should be used for 8bit RGB images
+     *             table have to be stored somewhere FIXME
+     */
+    int color_table_id;
+
+    /**
+     * internal_buffer count.
+     * Don't touch, used by lavc default_get_buffer()
+     */
+    int internal_buffer_count;
+
+    /**
+     * internal_buffers.
+     * Don't touch, used by lavc default_get_buffer()
+     */
+    void *internal_buffer;
+
+#define FF_LAMBDA_SHIFT 7
+#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
+#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
+#define FF_LAMBDA_MAX (256*128-1)
+
+#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
+    /**
+     * global quality for codecs which cannot change it per frame.
+     * this should be proportional to MPEG1/2/4 qscale.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int global_quality;
+
+#define FF_CODER_TYPE_VLC   0
+#define FF_CODER_TYPE_AC    1
+    /**
+     * coder type
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int coder_type;
+
+    /**
+     * context model
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int context_model;
+#if 0
+    /**
+     *
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
+#endif
+
+    /**
+     * slice flags
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    int slice_flags;
+#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
+#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
+#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
+
+    /**
+     * XVideo Motion Acceleration
+     * - encoding: forbidden
+     * - decoding: set by decoder
+     */
+    int xvmc_acceleration;
+
+    /**
+     * macroblock decision mode
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int mb_decision;
+#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
+#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
+#define FF_MB_DECISION_RD     2        ///< rate distoration
+
+    /**
+     * custom intra quantization matrix
+     * - encoding: set by user, can be NULL
+     * - decoding: set by lavc
+     */
+    uint16_t *intra_matrix;
+
+    /**
+     * custom inter quantization matrix
+     * - encoding: set by user, can be NULL
+     * - decoding: set by lavc
+     */
+    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 workaround some encoder bugs
+     * - encoding: unused
+     * - decoding: set by user, will be converted to upper case by lavc during init
+     */
+    unsigned int stream_codec_tag;
+
+    /**
+     * scene change detection threshold.
+     * 0 is default, larger means fewer detected scene changes
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int scenechange_threshold;
+
+    /**
+     * minimum lagrange multipler
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int lmin;
+
+    /**
+     * maximum lagrange multipler
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int lmax;
+
+    /**
+     * Palette control structure
+     * - encoding: ??? (no palette-enabled encoder yet)
+     * - decoding: set by user.
+     */
+    struct AVPaletteControl *palctrl;
+
+    /**
+     * noise reduction strength
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int noise_reduction;
+
+    /**
+     * called at the beginning of a frame to get cr buffer for it.
+     * buffer type (size, hints) must be the same. lavc won't check it.
+     * lavc 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().
+     * - encoding: unused
+     * - decoding: set by lavc, user can override
+     */
+    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
+
+    /**
+     * number of bits which should be loaded into the rc buffer before decoding starts
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int rc_initial_buffer_occupancy;
+
+    /**
+     *
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int inter_threshold;
+
+    /**
+     * CODEC_FLAG2_*.
+     * - encoding: set by user.
+     * - decoding: set by user.
+     */
+    int flags2;
+
+    /**
+     * simulates errors in the bitstream to test error concealment.
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int error_rate;
+
+    /**
+     * MP3 antialias algorithm, see FF_AA_* below.
+     * - encoding: unused
+     * - decoding: set by user
+     */
+    int antialias_algo;
+#define FF_AA_AUTO    0
+#define FF_AA_FASTINT 1 //not implemented yet
+#define FF_AA_INT     2
+#define FF_AA_FLOAT   3
+    /**
+     * Quantizer noise shaping.
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int quantizer_noise_shaping;
+
+    /**
+     * Thread count.
+     * is used to decide how many independant tasks should be passed to execute()
+     * - encoding: set by user
+     * - decoding: set by user
+     */
+    int thread_count;
+
+    /**
+     * the codec may call this to execute several independant 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 lavc, user can override
+     * - decoding: set by lavc, user can override
+     */
+    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), 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;
+
+    /**
+     * Motion estimation threshold. under which no motion estimation is
+     * performed, but instead the user specified motion vectors are used
+     *
+     * - encoding: set by user
+     * - decoding: unused
+     */
+     int me_threshold;
+
+    /**
+     * Macroblock threshold. under which the user specified macroblock types will be used
+     * - encoding: set by user
+     * - decoding: unused
+     */
+     int mb_threshold;
+
+    /**
+     * precision of the intra dc coefficient - 8.
+     * - encoding: set by user
+     * - decoding: unused
+     */
+     int intra_dc_precision;
+
+    /**
+     * noise vs. sse weight for the nsse comparsion function.
+     * - encoding: set by user
+     * - decoding: unused
+     */
+     int nsse_weight;
+
+    /**
+     * number of macroblock rows at the top which are skipped.
+     * - encoding: unused
+     * - decoding: set by user
+     */
+     int skip_top;
+
+    /**
+     * number of macroblock rows at the bottom which are skipped.
+     * - encoding: unused
+     * - decoding: set by user
+     */
+     int skip_bottom;
+
+    /**
+     * profile
+     * - encoding: set by user
+     * - decoding: set by lavc
+     */
+     int profile;
+#define FF_PROFILE_UNKNOWN -99
+
+    /**
+     * level
+     * - encoding: set by user
+     * - decoding: set by lavc
+     */
+     int level;
+#define FF_LEVEL_UNKNOWN -99
+
+    /**
+     * low resolution decoding. 1-> 1/2 size, 2->1/4 size
+     * - encoding: unused
+     * - decoding: set by user
+     */
+     int lowres;
+
+    /**
+     * bitsream width / height. may be different from width/height if lowres
+     * or other things are used
+     * - encoding: unused
+     * - decoding: set by user before init if known, codec should override / dynamically change if needed
+     */
+    int coded_width, coded_height;
+
+    /**
+     * frame skip threshold
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int frame_skip_threshold;
+
+    /**
+     * frame skip factor
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int frame_skip_factor;
+
+    /**
+     * frame skip exponent
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    int frame_skip_exp;
+
+    /**
+     * frame skip comparission function
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int frame_skip_cmp;
+
+    /**
+     * border processing masking. raises the quantizer for mbs on the borders
+     * of the picture.
+     * - encoding: set by user
+     * - decoding: unused
+     */
+    float border_masking;
+
+    /**
+     * minimum MB lagrange multipler.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int mb_lmin;
+
+    /**
+     * maximum MB lagrange multipler.
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int mb_lmax;
+
+    /**
+     *
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int me_penalty_compensation;
+
+    /**
+     *
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    enum AVDiscard skip_loop_filter;
+
+    /**
+     *
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    enum AVDiscard skip_idct;
+
+    /**
+     *
+     * - encoding: unused
+     * - decoding: set by user.
+     */
+    enum AVDiscard skip_frame;
+
+    /**
+     *
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int bidir_refine;
+
+    /**
+     *
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int brd_scale;
+
+    /**
+     * constant rate factor - quality-based VBR - values ~correspond to qps
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    float crf;
+
+    /**
+     * constant quantization parameter rate control method
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int cqp;
+
+    /**
+     * minimum gop size
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int keyint_min;
+
+    /**
+     * number of reference frames
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int refs;
+
+    /**
+     * chroma qp offset from luma
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int chromaoffset;
+
+    /**
+     * influences how often b-frames are used
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int bframebias;
+
+    /**
+     * trellis RD quantization
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int trellis;
+
+    /**
+     * reduce fluctuations in qp (before curve compression)
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    float complexityblur;
+
+    /**
+     * in-loop deblocking filter alphac0 parameter
+     * alpha is in the range -6...6
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int deblockalpha;
+
+    /**
+     * in-loop deblocking filter beta parameter
+     * beta is in the range -6...6
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int deblockbeta;
+
+    /**
+     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int partitions;
+#define X264_PART_I4X4 0x001  /* Analyse i4x4 */
+#define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
+#define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
+#define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
+#define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
+
+    /**
+     * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int directpred;
+
+    /**
+     * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int cutoff;
+
+    /**
+     * multiplied by qscale for each frame and added to scene_change_score
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int scenechange_factor;
+
+    /**
+     *
+     * note: value depends upon the compare functin used for fullpel ME
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int mv0_threshold;
+
+    /**
+     * adjusts sensitivity of b_frame_strategy 1
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int b_sensitivity;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused
+     */
+    int compression_level;
+#define FF_COMPRESSION_DEFAULT -1
+
+    /**
+     * sets whether to use LPC mode - used by FLAC encoder
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int use_lpc;
+
+    /**
+     * LPC coefficient precision - used by FLAC encoder
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int lpc_coeff_precision;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int min_prediction_order;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int max_prediction_order;
+
+    /**
+     * search method for selecting prediction order
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int prediction_order_method;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int min_partition_order;
+
+    /**
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int max_partition_order;
+
+    /**
+     * GOP timecode frame start number, in non drop frame format
+     * - encoding: set by user.
+     * - decoding: unused.
+     */
+    int64_t timecode_frame_start;
+} AVCodecContext;
+
+/**
+ * AVCodec.
+ */
+typedef struct AVCodec {
+    const char *name;
+    enum CodecType type;
+    enum CodecID id;
+    int priv_data_size;
+    int (*init)(AVCodecContext *);
+    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
+    int (*close)(AVCodecContext *);
+    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
+                  uint8_t *buf, int buf_size);
+    int capabilities;
+#if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
+    void *dummy; // FIXME remove next time we break binary compatibility
+#endif
+    struct AVCodec *next;
+    void (*flush)(AVCodecContext *);
+    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
+    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
+} AVCodec;
+
+/**
+ * four components are given, that's all.
+ * the last component is alpha
+ */
+typedef struct AVPicture {
+    uint8_t *data[4];
+    int linesize[4];       ///< number of bytes per line
+} AVPicture;
+
+/**
+ * AVPaletteControl
+ * This structure defines a method for communicating palette changes
+ * between and demuxer and a decoder.
+ * this is totally broken, palette changes should be sent as AVPackets
+ */
+#define AVPALETTE_SIZE 1024
+#define AVPALETTE_COUNT 256
+typedef struct AVPaletteControl {
+
+    /* demuxer sets this to 1 to indicate the palette has changed;
+     * decoder resets to 0 */
+    int palette_changed;
+
+    /* 4-byte ARGB palette entries, stored in native byte order; note that
+     * the individual palette components should be on a 8-bit scale; if
+     * the palette data comes from a IBM VGA native format, the component
+     * data is probably 6 bits in size and needs to be scaled */
+    unsigned int palette[AVPALETTE_COUNT];
+
+} AVPaletteControl attribute_deprecated;
+
+typedef struct AVSubtitleRect {
+    uint16_t x;
+    uint16_t y;
+    uint16_t w;
+    uint16_t h;
+    uint16_t nb_colors;
+    int linesize;
+    uint32_t *rgba_palette;
+    uint8_t *bitmap;
+} AVSubtitleRect;
+
+typedef struct AVSubtitle {
+    uint16_t format; /* 0 = graphics */
+    uint32_t start_display_time; /* relative to packet pts, in ms */
+    uint32_t end_display_time; /* relative to packet pts, in ms */
+    uint32_t num_rects;
+    AVSubtitleRect *rects;
+} AVSubtitle;
+
+extern AVCodec ac3_encoder;
+extern AVCodec mp2_encoder;
+extern AVCodec mp3lame_encoder;
+extern AVCodec oggvorbis_encoder;
+extern AVCodec faac_encoder;
+extern AVCodec flac_encoder;
+extern AVCodec gif_encoder;
+extern AVCodec xvid_encoder;
+extern AVCodec mpeg1video_encoder;
+extern AVCodec mpeg2video_encoder;
+extern AVCodec h261_encoder;
+extern AVCodec h263_encoder;
+extern AVCodec h263p_encoder;
+extern AVCodec flv_encoder;
+extern AVCodec rv10_encoder;
+extern AVCodec rv20_encoder;
+extern AVCodec dvvideo_encoder;
+extern AVCodec mjpeg_encoder;
+extern AVCodec ljpeg_encoder;
+extern AVCodec jpegls_encoder;
+extern AVCodec png_encoder;
+extern AVCodec ppm_encoder;
+extern AVCodec pgm_encoder;
+extern AVCodec pgmyuv_encoder;
+extern AVCodec pbm_encoder;
+extern AVCodec pam_encoder;
+extern AVCodec mpeg4_encoder;
+extern AVCodec msmpeg4v1_encoder;
+extern AVCodec msmpeg4v2_encoder;
+extern AVCodec msmpeg4v3_encoder;
+extern AVCodec wmv1_encoder;
+extern AVCodec wmv2_encoder;
+extern AVCodec huffyuv_encoder;
+extern AVCodec ffvhuff_encoder;
+extern AVCodec h264_encoder;
+extern AVCodec asv1_encoder;
+extern AVCodec asv2_encoder;
+extern AVCodec vcr1_encoder;
+extern AVCodec ffv1_encoder;
+extern AVCodec snow_encoder;
+extern AVCodec vorbis_encoder;
+extern AVCodec mdec_encoder;
+extern AVCodec zlib_encoder;
+extern AVCodec sonic_encoder;
+extern AVCodec sonic_ls_encoder;
+extern AVCodec svq1_encoder;
+extern AVCodec x264_encoder;
+
+extern AVCodec gif_decoder;
+extern AVCodec h263_decoder;
+extern AVCodec h261_decoder;
+extern AVCodec mpeg4_decoder;
+extern AVCodec msmpeg4v1_decoder;
+extern AVCodec msmpeg4v2_decoder;
+extern AVCodec msmpeg4v3_decoder;
+extern AVCodec wmv1_decoder;
+extern AVCodec wmv2_decoder;
+extern AVCodec vc1_decoder;
+extern AVCodec wmv3_decoder;
+extern AVCodec mpeg1video_decoder;
+extern AVCodec mpeg2video_decoder;
+extern AVCodec mpegvideo_decoder;
+extern AVCodec mpeg_xvmc_decoder;
+extern AVCodec h263i_decoder;
+extern AVCodec flv_decoder;
+extern AVCodec rv10_decoder;
+extern AVCodec rv20_decoder;
+extern AVCodec rv30_decoder;
+extern AVCodec rv40_decoder;
+extern AVCodec svq1_decoder;
+extern AVCodec svq3_decoder;
+extern AVCodec dvvideo_decoder;
+extern AVCodec wmav1_decoder;
+extern AVCodec wmav2_decoder;
+extern AVCodec mjpeg_decoder;
+extern AVCodec mjpegb_decoder;
+extern AVCodec sp5x_decoder;
+extern AVCodec png_decoder;
+extern AVCodec mp2_decoder;
+extern AVCodec mp3_decoder;
+extern AVCodec mp3adu_decoder;
+extern AVCodec mp3on4_decoder;
+extern AVCodec qdm2_decoder;
+extern AVCodec cook_decoder;
+extern AVCodec truespeech_decoder;
+extern AVCodec tta_decoder;
+extern AVCodec mace3_decoder;
+extern AVCodec mace6_decoder;
+extern AVCodec huffyuv_decoder;
+extern AVCodec ffvhuff_decoder;
+extern AVCodec oggvorbis_decoder;
+extern AVCodec cyuv_decoder;
+extern AVCodec h264_decoder;
+extern AVCodec indeo3_decoder;
+extern AVCodec vp3_decoder;
+extern AVCodec theora_decoder;
+extern AVCodec vp5_decoder;
+extern AVCodec vp6_decoder;
+extern AVCodec vp6f_decoder;
+extern AVCodec amr_nb_decoder;
+extern AVCodec amr_nb_encoder;
+extern AVCodec amr_wb_encoder;
+extern AVCodec amr_wb_decoder;
+extern AVCodec aac_decoder;
+extern AVCodec mpeg4aac_decoder;
+extern AVCodec asv1_decoder;
+extern AVCodec asv2_decoder;
+extern AVCodec vcr1_decoder;
+extern AVCodec cljr_decoder;
+extern AVCodec ffv1_decoder;
+extern AVCodec snow_decoder;
+extern AVCodec fourxm_decoder;
+extern AVCodec mdec_decoder;
+extern AVCodec roq_decoder;
+extern AVCodec interplay_video_decoder;
+extern AVCodec xan_wc3_decoder;
+extern AVCodec rpza_decoder;
+extern AVCodec cinepak_decoder;
+extern AVCodec msrle_decoder;
+extern AVCodec msvideo1_decoder;
+extern AVCodec vqa_decoder;
+extern AVCodec idcin_decoder;
+extern AVCodec eightbps_decoder;
+extern AVCodec smc_decoder;
+extern AVCodec flic_decoder;
+extern AVCodec vmdvideo_decoder;
+extern AVCodec vmdaudio_decoder;
+extern AVCodec truemotion1_decoder;
+extern AVCodec truemotion2_decoder;
+extern AVCodec mszh_decoder;
+extern AVCodec zlib_decoder;
+extern AVCodec ra_144_decoder;
+extern AVCodec ra_288_decoder;
+extern AVCodec roq_dpcm_decoder;
+extern AVCodec interplay_dpcm_decoder;
+extern AVCodec xan_dpcm_decoder;
+extern AVCodec sol_dpcm_decoder;
+extern AVCodec sonic_decoder;
+extern AVCodec qtrle_decoder;
+extern AVCodec flac_decoder;
+extern AVCodec tscc_decoder;
+extern AVCodec cscd_decoder;
+extern AVCodec nuv_decoder;
+extern AVCodec ulti_decoder;
+extern AVCodec qdraw_decoder;
+extern AVCodec xl_decoder;
+extern AVCodec qpeg_decoder;
+extern AVCodec shorten_decoder;
+extern AVCodec loco_decoder;
+extern AVCodec wnv1_decoder;
+extern AVCodec aasc_decoder;
+extern AVCodec alac_decoder;
+extern AVCodec ws_snd1_decoder;
+extern AVCodec indeo2_decoder;
+extern AVCodec vorbis_decoder;
+extern AVCodec fraps_decoder;
+extern AVCodec libgsm_encoder;
+extern AVCodec libgsm_decoder;
+extern AVCodec bmp_decoder;
+extern AVCodec mmvideo_decoder;
+extern AVCodec zmbv_decoder;
+extern AVCodec avs_decoder;
+extern AVCodec smacker_decoder;
+extern AVCodec smackaud_decoder;
+extern AVCodec kmvc_decoder;
+extern AVCodec flashsv_decoder;
+extern AVCodec cavs_decoder;
+extern AVCodec vmnc_decoder;
+extern AVCodec wavpack_decoder;
+extern AVCodec targa_decoder;
+extern AVCodec dsicinvideo_decoder;
+extern AVCodec dsicinaudio_decoder;
+extern AVCodec tiertexseqvideo_decoder;
+extern AVCodec tiff_decoder;
+extern AVCodec imc_decoder;
+
+/* pcm codecs */
+#define PCM_CODEC(id, name) \
+extern AVCodec name ## _decoder; \
+extern AVCodec name ## _encoder
+
+PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
+PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
+PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
+PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
+PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
+PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
+PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
+PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
+PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
+PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
+PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
+PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
+PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
+PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
+PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
+PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
+PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
+
+/* adpcm codecs */
+
+PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
+PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
+PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
+PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
+PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
+PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
+PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
+PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
+PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
+PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
+PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
+PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
+PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
+PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
+PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
+PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
+
+#undef PCM_CODEC
+
+/* dummy raw video codec */
+extern AVCodec rawvideo_encoder;
+extern AVCodec rawvideo_decoder;
+
+/* the following codecs use external GPL libs */
+extern AVCodec ac3_decoder;
+extern AVCodec dts_decoder;
+
+/* subtitles */
+extern AVCodec dvdsub_encoder;
+extern AVCodec dvdsub_decoder;
+extern AVCodec dvbsub_encoder;
+extern AVCodec dvbsub_decoder;
+
+/* resample.c */
+
+struct ReSampleContext;
+struct AVResampleContext;
+
+typedef struct ReSampleContext ReSampleContext;
+
+ReSampleContext *audio_resample_init(int output_channels, int input_channels,
+                                     int output_rate, int input_rate);
+int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
+void audio_resample_close(ReSampleContext *s);
+
+struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
+int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
+void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
+void av_resample_close(struct AVResampleContext *c);
+
+/* YUV420 format is assumed ! */
+
+struct ImgReSampleContext;
+
+typedef struct ImgReSampleContext ImgReSampleContext;
+
+ImgReSampleContext *img_resample_init(int output_width, int output_height,
+                                      int input_width, int input_height);
+
+ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
+                                      int iwidth, int iheight,
+                                      int topBand, int bottomBand,
+                                      int leftBand, int rightBand,
+                                      int padtop, int padbottom,
+                                      int padleft, int padright);
+
+
+void img_resample(ImgReSampleContext *s,
+                  AVPicture *output, const AVPicture *input);
+
+void img_resample_close(ImgReSampleContext *s);
+
+/**
+ * Allocate memory for a picture.  Call avpicture_free to free it.
+ *
+ * @param picture the picture to be filled in.
+ * @param pix_fmt the format of the picture.
+ * @param width the width of the picture.
+ * @param height the height of the picture.
+ * @return 0 if successful, -1 if not.
+ */
+int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
+
+/* Free a picture previously allocated by avpicture_alloc. */
+void avpicture_free(AVPicture *picture);
+
+int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+                   int pix_fmt, int width, int height);
+int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
+                     unsigned char *dest, int dest_size);
+int avpicture_get_size(int pix_fmt, int width, int height);
+void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
+const char *avcodec_get_pix_fmt_name(int pix_fmt);
+void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
+enum PixelFormat avcodec_get_pix_fmt(const char* name);
+unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
+
+#define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
+#define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
+#define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
+#define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
+#define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
+#define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
+
+int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
+                             int has_alpha);
+int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
+                              int has_alpha, int *loss_ptr);
+
+#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
+#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
+int img_get_alpha_info(const AVPicture *src,
+                       int pix_fmt, int width, int height);
+
+/* convert among pixel formats */
+int img_convert(AVPicture *dst, int dst_pix_fmt,
+                const AVPicture *src, int pix_fmt,
+                int width, int height);
+
+/* deinterlace a picture */
+int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
+                          int pix_fmt, int width, int height);
+
+/* external high level API */
+
+extern AVCodec *first_avcodec;
+
+/* returns LIBAVCODEC_VERSION_INT constant */
+unsigned avcodec_version(void);
+/* returns LIBAVCODEC_BUILD constant */
+unsigned avcodec_build(void);
+void avcodec_init(void);
+
+void register_avcodec(AVCodec *format);
+AVCodec *avcodec_find_encoder(enum CodecID id);
+AVCodec *avcodec_find_encoder_by_name(const char *name);
+AVCodec *avcodec_find_decoder(enum CodecID id);
+AVCodec *avcodec_find_decoder_by_name(const char *name);
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
+
+void avcodec_get_context_defaults(AVCodecContext *s);
+AVCodecContext *avcodec_alloc_context(void);
+void avcodec_get_frame_defaults(AVFrame *pic);
+AVFrame *avcodec_alloc_frame(void);
+
+int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
+void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
+int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
+void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
+int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
+enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
+
+int avcodec_thread_init(AVCodecContext *s, int thread_count);
+void avcodec_thread_free(AVCodecContext *s);
+int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
+//FIXME func typedef
+
+/**
+ * opens / inits the AVCodecContext.
+ * not thread save!
+ */
+int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
+
+/**
+ * Decode an audio frame.
+ *
+ * @param avctx the codec context.
+ * @param samples output buffer, 16 byte aligned
+ * @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
+ * @param buf input buffer, 16 byte aligned
+ * @param buf_size the input buffer size
+ * @return 0 if successful, -1 if not.
+ */
+
+int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
+                         int *frame_size_ptr,
+                         uint8_t *buf, int buf_size);
+int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
+                         int *got_picture_ptr,
+                         uint8_t *buf, int buf_size);
+int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
+                            int *got_sub_ptr,
+                            const uint8_t *buf, int buf_size);
+int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
+                        int *data_size_ptr,
+                        uint8_t *buf, int buf_size);
+int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                         const short *samples);
+int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                         const AVFrame *pict);
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub);
+
+int avcodec_close(AVCodecContext *avctx);
+
+void avcodec_register_all(void);
+
+void avcodec_flush_buffers(AVCodecContext *avctx);
+
+void avcodec_default_free_buffers(AVCodecContext *s);
+
+/* misc usefull functions */
+
+/**
+ * returns a single letter to describe the picture type
+ */
+char av_get_pict_type_char(int pict_type);
+
+/**
+ * returns codec bits per sample
+ */
+int av_get_bits_per_sample(enum CodecID codec_id);
+
+/* frame parsing */
+typedef struct AVCodecParserContext {
+    void *priv_data;
+    struct AVCodecParser *parser;
+    int64_t frame_offset; /* offset of the current frame */
+    int64_t cur_offset; /* current offset
+                           (incremented by each av_parser_parse()) */
+    int64_t last_frame_offset; /* offset of the last frame */
+    /* video info */
+    int pict_type; /* XXX: put it back in AVCodecContext */
+    int repeat_pict; /* XXX: put it back in AVCodecContext */
+    int64_t pts;     /* pts of the current frame */
+    int64_t dts;     /* dts of the current frame */
+
+    /* private data */
+    int64_t last_pts;
+    int64_t last_dts;
+    int fetch_timestamp;
+
+#define AV_PARSER_PTS_NB 4
+    int cur_frame_start_index;
+    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
+    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
+    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
+
+    int flags;
+#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
+} AVCodecParserContext;
+
+typedef struct AVCodecParser {
+    int codec_ids[5]; /* several codec IDs are permitted */
+    int priv_data_size;
+    int (*parser_init)(AVCodecParserContext *s);
+    int (*parser_parse)(AVCodecParserContext *s,
+                        AVCodecContext *avctx,
+                        uint8_t **poutbuf, int *poutbuf_size,
+                        const uint8_t *buf, int buf_size);
+    void (*parser_close)(AVCodecParserContext *s);
+    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
+    struct AVCodecParser *next;
+} AVCodecParser;
+
+extern AVCodecParser *av_first_parser;
+
+void av_register_codec_parser(AVCodecParser *parser);
+AVCodecParserContext *av_parser_init(int codec_id);
+int av_parser_parse(AVCodecParserContext *s,
+                    AVCodecContext *avctx,
+                    uint8_t **poutbuf, int *poutbuf_size,
+                    const uint8_t *buf, int buf_size,
+                    int64_t pts, int64_t dts);
+int av_parser_change(AVCodecParserContext *s,
+                     AVCodecContext *avctx,
+                     uint8_t **poutbuf, int *poutbuf_size,
+                     const uint8_t *buf, int buf_size, int keyframe);
+void av_parser_close(AVCodecParserContext *s);
+
+extern AVCodecParser mpegvideo_parser;
+extern AVCodecParser mpeg4video_parser;
+extern AVCodecParser cavsvideo_parser;
+extern AVCodecParser h261_parser;
+extern AVCodecParser h263_parser;
+extern AVCodecParser h264_parser;
+extern AVCodecParser mjpeg_parser;
+extern AVCodecParser pnm_parser;
+extern AVCodecParser mpegaudio_parser;
+extern AVCodecParser ac3_parser;
+extern AVCodecParser dvdsub_parser;
+extern AVCodecParser dvbsub_parser;
+extern AVCodecParser aac_parser;
+
+
+typedef struct AVBitStreamFilterContext {
+    void *priv_data;
+    struct AVBitStreamFilter *filter;
+    AVCodecParserContext *parser;
+    struct AVBitStreamFilterContext *next;
+} AVBitStreamFilterContext;
+
+
+typedef struct AVBitStreamFilter {
+    const char *name;
+    int priv_data_size;
+    int (*filter)(AVBitStreamFilterContext *bsfc,
+                  AVCodecContext *avctx, const char *args,
+                  uint8_t **poutbuf, int *poutbuf_size,
+                  const uint8_t *buf, int buf_size, int keyframe);
+    struct AVBitStreamFilter *next;
+} AVBitStreamFilter;
+
+extern AVBitStreamFilter *av_first_bitstream_filter;
+
+void av_register_bitstream_filter(AVBitStreamFilter *bsf);
+AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
+int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
+                               AVCodecContext *avctx, const char *args,
+                               uint8_t **poutbuf, int *poutbuf_size,
+                               const uint8_t *buf, int buf_size, int keyframe);
+void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
+
+extern AVBitStreamFilter dump_extradata_bsf;
+extern AVBitStreamFilter remove_extradata_bsf;
+extern AVBitStreamFilter noise_bsf;
+extern AVBitStreamFilter mp3_header_compress_bsf;
+extern AVBitStreamFilter mp3_header_decompress_bsf;
+extern AVBitStreamFilter mjpega_dump_header_bsf;
+
+
+/* memory */
+void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
+/* for static data only */
+/* call av_free_static to release all staticaly allocated tables */
+void av_free_static(void);
+void *av_mallocz_static(unsigned int size);
+void *av_realloc_static(void *ptr, unsigned int size);
+
+void img_copy(AVPicture *dst, const AVPicture *src,
+              int pix_fmt, int width, int height);
+
+int img_crop(AVPicture *dst, const AVPicture *src,
+             int pix_fmt, int top_band, int left_band);
+
+int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
+            int padtop, int padbottom, int padleft, int padright, int *color);
+
+/* endian macros */
+#if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
+#define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
+#define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
+                   (((uint8_t*)(x))[1] << 16) | \
+                   (((uint8_t*)(x))[2] << 8) | \
+                    ((uint8_t*)(x))[3])
+#define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
+#define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
+                   (((uint8_t*)(x))[2] << 16) | \
+                   (((uint8_t*)(x))[1] << 8) | \
+                    ((uint8_t*)(x))[0])
+#endif
+
+extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* AVCODEC_H */