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ffmpeg/libavcodec/avcodec.h
Mike Melanson 0f371e3e2a final word on RGBA byte order 
Originally committed as revision 2268 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-09-13 02:31:03 +00:00

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#ifndef AVCODEC_H
#define AVCODEC_H
/**
* @file avcodec.h
* external api header.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "common.h"
#define FFMPEG_VERSION_INT 0x000408
#define FFMPEG_VERSION "0.4.8"
#define LIBAVCODEC_BUILD 4679
#define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
#define LIBAVCODEC_VERSION FFMPEG_VERSION
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
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_H263,
CODEC_ID_RV10,
CODEC_ID_MP2,
CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
CODEC_ID_VORBIS,
CODEC_ID_AC3,
CODEC_ID_MJPEG,
CODEC_ID_MJPEGB,
CODEC_ID_LJPEG,
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_DVAUDIO,
CODEC_ID_WMAV1,
CODEC_ID_WMAV2,
CODEC_ID_MACE3,
CODEC_ID_MACE6,
CODEC_ID_HUFFYUV,
CODEC_ID_CYUV,
CODEC_ID_H264,
CODEC_ID_INDEO3,
CODEC_ID_VP3,
CODEC_ID_AAC,
CODEC_ID_MPEG4AAC,
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,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE,
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,
/* various adpcm codecs */
CODEC_ID_ADPCM_IMA_QT,
CODEC_ID_ADPCM_IMA_WAV,
CODEC_ID_ADPCM_IMA_DK3,
CODEC_ID_ADPCM_IMA_DK4,
CODEC_ID_ADPCM_MS,
CODEC_ID_ADPCM_4XM,
/* AMR */
CODEC_ID_AMR_NB,
/* RealAudio codecs*/
CODEC_ID_RA_144,
CODEC_ID_RA_288,
/* various DPCM codecs */
CODEC_ID_ROQ_DPCM,
CODEC_ID_INTERPLAY_DPCM,
CODEC_ID_XAN_DPCM,
};
/* CODEC_ID_MP3LAME is absolete */
#define CODEC_ID_MP3LAME CODEC_ID_MP3
enum CodecType {
CODEC_TYPE_UNKNOWN = -1,
CODEC_TYPE_VIDEO,
CODEC_TYPE_AUDIO,
};
/**
* Pixel format. Notes:
*
* PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
* color is put together as:
* (A << 24) | (R << 16) | (G << 8) | B
* This is stored as BGRA on little endian CPU architectures and ARGB on
* big endian CPUs.
*
* When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
* image data is stored in AVFrame.data[0]. The palette is transported in
* AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
* formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
* also endian-specific).
*/
enum PixelFormat {
PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
PIX_FMT_YUV422,
PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
PIX_FMT_RGB565, ///< always stored in cpu endianness
PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
PIX_FMT_GRAY8,
PIX_FMT_MONOWHITE, ///< 0 is white
PIX_FMT_MONOBLACK, ///< 0 is black
PIX_FMT_PAL8, ///< 8 bit with RGBA palette
PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
PIX_FMT_XVMC_MPEG2_IDCT,
PIX_FMT_NB,
};
/* currently unused, may be used if 24/32 bits samples ever supported */
enum SampleFormat {
SAMPLE_FMT_S16 = 0, ///< signed 16 bits
};
/* in bytes */
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
/**
* 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
/* motion estimation type, EPZS by default */
enum Motion_Est_ID {
ME_ZERO = 1,
ME_FULL,
ME_LOG,
ME_PHODS,
ME_EPZS,
ME_X1
};
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;
/* only for ME compatiblity with old apps */
extern int motion_estimation_method;
/* ME algos sorted by quality */
static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
ME_X1, ME_EPZS, ME_FULL };
#define FF_MAX_B_FRAMES 8
/* encoding support
these flags can be passed in AVCodecContext.flags before initing
Note: note not everything is supported yet
*/
#define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
#define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
#define CODEC_FLAG_GMC 0x0020 ///< use GMC
#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///< dont 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 ///< Advanced intra coding
#define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
/* For advanced prediction mode, we reuse the 4MV flag */
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Deblocking filter internal loop
* Slice structured
* Reference Picture Selection
* Independant Segment Decoding
* Alternative Inter * VLC
* Modified Quantization */
/* /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
#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 isnt 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 micro seconds (time when frame should be shown to user)\
* if 0 then the frame_rate will be used as reference\
* - 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 31 (bad)) \
* - encoding: set by lavc for coded_picture (and set by user for input)\
* - decoding: set by lavc\
*/\
float quality; \
\
/**\
* buffer age (1->was last buffer and dint change, 2->..., ...).\
* set to something large 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;\
\
/**\
* 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;\
#define FF_QSCALE_TYPE_MPEG1 0
#define FF_QSCALE_TYPE_MPEG2 1
#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 somewher else, dont dealloc image (data/base)
#define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont 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
/**
* Audio Video Frame.
*/
typedef struct AVFrame {
FF_COMMON_FRAME
} AVFrame;
#define DEFAULT_FRAME_RATE_BASE 1001000
/**
* main external api structure.
*/
typedef struct AVCodecContext {
/**
* 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.
* - 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)
* - encoding: set/allocated/freed by lavc.
* - decoding: set/allocated/freed by user.
*/
void *extradata;
int extradata_size;
/* video only */
/**
* frames per sec multiplied by frame_rate_base.
* for variable fps this is the precission, so if the timestamps
* can be specified in msec precssion then this is 1000*frame_rate_base
* - encoding: MUST be set by user
* - decoding: set by lavc. 0 or the frame_rate if available
*/
int frame_rate;
/**
* width / height.
* - encoding: MUST be set by user.
* - decoding: set by user, some codecs might override / change it during playback
*/
int width, height;
#define FF_ASPECT_SQUARE 1
#define FF_ASPECT_4_3_625 2
#define FF_ASPECT_4_3_525 3
#define FF_ASPECT_16_9_625 4
#define FF_ASPECT_16_9_525 5
#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: FIXME: used by ffmpeg to decide whether an pix_fmt
* conversion is in order. This only works for
* codecs with one supported pix_fmt, we should
* do something for a generic case as well.
* - 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,
AVFrame *src, int offset[4],
int y, int type, int height);
/* audio only */
int sample_rate; ///< samples per sec
int channels;
int sample_fmt; ///< sample format, currenly unused
/* the following data should not be initialized */
int frame_size; ///< in samples, initialized when calling 'init'
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;
int b_frame_strategy;
/**
* hurry up amount.
* - 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;
/* The following data is for RTP friendly coding */
/* By now only H.263/H.263+/MPEG4 coder honours this */
int rtp_mode; /* 1 for activate RTP friendly-mode */
/* highers numbers represent more error-prone */
/* enviroments, by now just "1" exist */
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 callcack: This function is called */
/* every time the encoder as a packet to send */
/* Depends on the encoder if the data starts */
/* with a Start Code (it should) H.263 does */
void (*rtp_callback)(void *data, int size, int packet_number);
/* 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: unused
* - 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_AC_VLC 32
#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_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;
/**
* 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_CAREFULL 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
* width and height should 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);
/**
* is 1 if the decoded stream contains b frames, 0 otherwise.
* - encoding: unused
* - decoding: set by lavc
*/
int has_b_frames;
int block_align; ///< used by some WAV based audio codecs
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.
* - encoding: set by user.
* - decoding: unused
*/
float i_quant_factor;
/**
* qscale offset 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_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
/**
* 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
/**
* 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 */
#endif /* HAVE_MMX */
/**
* 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
/**
* aspect ratio (0 if unknown).
* - encoding: set by user.
* - decoding: set by lavc.
*/
float 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_VIS_MV 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
/**
* error.
* - encoding: set by lavc if flags&CODEC_FLAG_PSNR
* - decoding: unused
*/
uint64_t error[4];
/**
* minimum MB quantizer.
* - encoding: set by user.
* - decoding: unused
*/
int mb_qmin;
/**
* maximum MB quantizer.
* - encoding: set by user.
* - 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;
#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_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, 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;
/**
* frame_rate_base.
* for variable fps this is 1
* - encoding: set by user.
* - decoding: set by lavc.
* @todo move this after frame_rate
*/
int frame_rate_base;
/**
* 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.
* Dont touch, used by lavc default_get_buffer()
*/
int internal_buffer_count;
/**
* internal_buffers.
* Dont touch, used by lavc default_get_buffer()
*/
void *internal_buffer;
#define FF_QUALITY_SCALE 256
/**
* 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;
/**
* 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;
} AVCodecContext;
/**
* AVOption.
*/
typedef struct AVOption {
/** options' name */
const char *name; /* if name is NULL, it indicates a link to next */
/** short English text help or const struct AVOption* subpointer */
const char *help; // const struct AVOption* sub;
/** offset to context structure where the parsed value should be stored */
int offset;
/** options' type */
int type;
#define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
#define FF_OPT_TYPE_DOUBLE 2 ///< double
#define FF_OPT_TYPE_INT 3 ///< integer
#define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
#define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
//#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
#define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
#define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
/** min value (min == max -> no limits) */
double min;
/** maximum value for double/int */
double max;
/** default boo [0,1]l/double/int value */
double defval;
/**
* default string value (with optional semicolon delimited extra option-list
* i.e. option1;option2;option3
* defval might select other then first argument as default
*/
const char *defstr;
#define FF_OPT_MAX_DEPTH 10
} AVOption;
/**
* Parse option(s) and sets fields in passed structure
* @param strct structure where the parsed results will be written
* @param list list with AVOptions
* @param opts string with options for parsing
*/
int avoption_parse(void* strct, const AVOption* list, const char* opts);
/**
* AVCodec.
*/
typedef struct AVCodec {
const char *name;
enum CodecType type;
int 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;
const AVOption *options;
struct AVCodec *next;
void (*flush)(AVCodecContext *);
} 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.
*/
typedef struct AVPaletteControl {
/* demuxer sets this to 1 to indicate the palette has changed;
* decoder resets to 0 */
int palette_changed;
/* 256 3-byte RGB palette entries; the components should be
* formatted in the buffer as "RGBRGB..." and should be scaled to
* 8 bits if they originally represented 6-bit VGA palette
* components */
unsigned char palette[256 * 3];
} AVPaletteControl;
extern AVCodec ac3_encoder;
extern AVCodec mp2_encoder;
extern AVCodec mp3lame_encoder;
extern AVCodec oggvorbis_encoder;
extern AVCodec mpeg1video_encoder;
extern AVCodec mpeg2video_encoder;
extern AVCodec h263_encoder;
extern AVCodec h263p_encoder;
extern AVCodec flv_encoder;
extern AVCodec rv10_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec ljpeg_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 h264_encoder;
extern AVCodec asv1_encoder;
extern AVCodec asv2_encoder;
extern AVCodec vcr1_encoder;
extern AVCodec ffv1_encoder;
extern AVCodec mdec_encoder;
extern AVCodec h263_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 mpeg1video_decoder;
extern AVCodec mpeg2video_decoder;
extern AVCodec mpeg_xvmc_decoder;
extern AVCodec h263i_decoder;
extern AVCodec flv_decoder;
extern AVCodec rv10_decoder;
extern AVCodec svq1_decoder;
extern AVCodec svq3_decoder;
extern AVCodec dvvideo_decoder;
extern AVCodec dvaudio_decoder;
extern AVCodec wmav1_decoder;
extern AVCodec wmav2_decoder;
extern AVCodec mjpeg_decoder;
extern AVCodec mjpegb_decoder;
extern AVCodec mp2_decoder;
extern AVCodec mp3_decoder;
extern AVCodec mace3_decoder;
extern AVCodec mace6_decoder;
extern AVCodec huffyuv_decoder;
extern AVCodec oggvorbis_decoder;
extern AVCodec cyuv_decoder;
extern AVCodec h264_decoder;
extern AVCodec indeo3_decoder;
extern AVCodec vp3_decoder;
extern AVCodec amr_nb_decoder;
extern AVCodec amr_nb_encoder;
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 fourxm_decoder;
extern AVCodec mdec_decoder;
extern AVCodec roq_decoder;
extern AVCodec interplay_video_decoder;
extern AVCodec xan_wc3_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;
/* pcm codecs */
#define PCM_CODEC(id, name) \
extern AVCodec name ## _decoder; \
extern AVCodec name ## _encoder
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_MS, adpcm_ms);
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
#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;
/* resample.c */
struct ReSampleContext;
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);
/* 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);
void img_resample(ImgReSampleContext *s,
AVPicture *output, AVPicture *input);
void img_resample_close(ImgReSampleContext *s);
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
int pix_fmt, int width, int height);
int avpicture_layout(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);
enum PixelFormat avcodec_get_pix_fmt(const char* name);
#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(AVPicture *src, int pix_fmt, int width, int height);
/* convert among pixel formats */
int img_convert(AVPicture *dst, int dst_pix_fmt,
AVPicture *src, int pix_fmt,
int width, int height);
/* deinterlace a picture */
int avpicture_deinterlace(AVPicture *dst, 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);
AVFrame *avcodec_alloc_frame(void);
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
void avcodec_default_free_buffers(AVCodecContext *s);
/**
* opens / inits the AVCodecContext.
* not thread save!
*/
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
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_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_close(AVCodecContext *avctx);
void avcodec_register_all(void);
void avcodec_flush_buffers(AVCodecContext *avctx);
/* misc usefull functions */
/**
* returns a single letter to describe the picture type
*/
char av_get_pict_type_char(int pict_type);
/**
* reduce a fraction.
* this is usefull for framerate calculations
* @param max the maximum allowed for dst_nom & dst_den
* @return 1 if exact, 0 otherwise
*/
int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
/**
* rescale a 64bit integer.
* a simple a*b/c isnt possible as it can overflow
*/
int64_t av_rescale(int64_t a, int b, int c);
/**
* Interface for 0.5.0 version
*
* do not even think about it's usage for this moment
*/
typedef struct {
/// compressed size used from given memory buffer
int size;
/// I/P/B frame type
int frame_type;
} avc_enc_result_t;
/**
* Commands
* order can't be changed - once it was defined
*/
typedef enum {
// general commands
AVC_OPEN_BY_NAME = 0xACA000,
AVC_OPEN_BY_CODEC_ID,
AVC_OPEN_BY_FOURCC,
AVC_CLOSE,
AVC_FLUSH,
// pin - struct { uint8_t* src, uint_t src_size }
// pout - struct { AVPicture* img, consumed_bytes,
AVC_DECODE,
// pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
// pout - uint_t used_from_dest_size
AVC_ENCODE,
// query/get video commands
AVC_GET_VERSION = 0xACB000,
AVC_GET_WIDTH,
AVC_GET_HEIGHT,
AVC_GET_DELAY,
AVC_GET_QUANT_TABLE,
// ...
// query/get audio commands
AVC_GET_FRAME_SIZE = 0xABC000,
// maybe define some simple structure which
// might be passed to the user - but they can't
// contain any codec specific parts and these
// calls are usualy necessary only few times
// set video commands
AVC_SET_WIDTH = 0xACD000,
AVC_SET_HEIGHT,
// set video encoding commands
AVC_SET_FRAME_RATE = 0xACD800,
AVC_SET_QUALITY,
AVC_SET_HURRY_UP,
// set audio commands
AVC_SET_SAMPLE_RATE = 0xACE000,
AVC_SET_CHANNELS,
} avc_cmd_t;
/**
* \param handle allocated private structure by libavcodec
* for initialization pass NULL - will be returned pout
* user is supposed to know nothing about its structure
* \param cmd type of operation to be performed
* \param pint input parameter
* \param pout output parameter
*
* \returns command status - eventually for query command it might return
* integer resulting value
*/
int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
/* memory */
void *av_malloc(unsigned int size);
void *av_mallocz(unsigned int size);
void *av_realloc(void *ptr, unsigned int size);
void av_free(void *ptr);
char *av_strdup(const char *s);
void __av_freep(void **ptr);
#define av_freep(p) __av_freep((void **)(p))
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(void** location, unsigned int size);
#define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
#ifdef __cplusplus
}
#endif
#endif /* AVCODEC_H */
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