mirror of https://git.ffmpeg.org/ffmpeg.git
1486 lines
41 KiB
C
1486 lines
41 KiB
C
#ifndef AVCODEC_H
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#define AVCODEC_H
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/**
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* @file avcodec.h
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* external api header.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "common.h"
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#define LIBAVCODEC_VERSION_INT 0x000406
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#define LIBAVCODEC_VERSION "0.4.6"
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#define LIBAVCODEC_BUILD 4666
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#define LIBAVCODEC_BUILD_STR "4666"
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#define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" LIBAVCODEC_BUILD_STR
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enum CodecID {
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CODEC_ID_NONE,
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CODEC_ID_MPEG1VIDEO,
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CODEC_ID_H263,
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CODEC_ID_RV10,
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CODEC_ID_MP2,
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CODEC_ID_MP3LAME,
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CODEC_ID_VORBIS,
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CODEC_ID_AC3,
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CODEC_ID_MJPEG,
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CODEC_ID_MJPEGB,
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CODEC_ID_MPEG4,
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CODEC_ID_RAWVIDEO,
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CODEC_ID_MSMPEG4V1,
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CODEC_ID_MSMPEG4V2,
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CODEC_ID_MSMPEG4V3,
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CODEC_ID_WMV1,
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CODEC_ID_WMV2,
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CODEC_ID_H263P,
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CODEC_ID_H263I,
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CODEC_ID_SVQ1,
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CODEC_ID_SVQ3,
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CODEC_ID_DVVIDEO,
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CODEC_ID_DVAUDIO,
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CODEC_ID_WMAV1,
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CODEC_ID_WMAV2,
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CODEC_ID_MACE3,
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CODEC_ID_MACE6,
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CODEC_ID_HUFFYUV,
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CODEC_ID_CYUV,
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CODEC_ID_H264,
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CODEC_ID_INDEO3,
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CODEC_ID_VP3,
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CODEC_ID_AAC,
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CODEC_ID_MPEG4AAC,
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/* various pcm "codecs" */
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CODEC_ID_PCM_S16LE,
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CODEC_ID_PCM_S16BE,
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CODEC_ID_PCM_U16LE,
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CODEC_ID_PCM_U16BE,
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CODEC_ID_PCM_S8,
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CODEC_ID_PCM_U8,
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CODEC_ID_PCM_MULAW,
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CODEC_ID_PCM_ALAW,
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/* various adpcm codecs */
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CODEC_ID_ADPCM_IMA_QT,
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CODEC_ID_ADPCM_IMA_WAV,
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CODEC_ID_ADPCM_MS,
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/* AMR */
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CODEC_ID_AMR_NB,
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};
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enum CodecType {
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CODEC_TYPE_UNKNOWN = -1,
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CODEC_TYPE_VIDEO,
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CODEC_TYPE_AUDIO,
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};
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/**
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* Pixel format.
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*/
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enum PixelFormat {
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PIX_FMT_YUV420P,
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PIX_FMT_YUV422,
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PIX_FMT_RGB24, ///< 3 bytes, R is first
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PIX_FMT_BGR24, ///< 3 bytes, B is first
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PIX_FMT_YUV422P,
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PIX_FMT_YUV444P,
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PIX_FMT_RGBA32, ///< always stored in cpu endianness
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PIX_FMT_YUV410P,
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PIX_FMT_YUV411P,
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PIX_FMT_RGB565, ///< always stored in cpu endianness
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PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
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PIX_FMT_GRAY8,
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PIX_FMT_MONOWHITE, ///< 0 is white
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PIX_FMT_MONOBLACK, ///< 0 is black
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PIX_FMT_PAL8, ///< 8 bit with RGBA palette
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PIX_FMT_YUVJ420P, ///< YUV full scale (jpeg)
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PIX_FMT_YUVJ422P, ///< YUV full scale (jpeg)
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PIX_FMT_YUVJ444P, ///< YUV full scale (jpeg)
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PIX_FMT_NB,
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};
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/* currently unused, may be used if 24/32 bits samples ever supported */
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enum SampleFormat {
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SAMPLE_FMT_S16 = 0, ///< signed 16 bits
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
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/**
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* Required number of zero bytes at the end of the input bitstream for decoding.
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* to avoid overreading (and possibly segfaulting)
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*/
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#define FF_INPUT_BUFFER_PADDING_SIZE 8
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/* motion estimation type, EPZS by default */
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enum Motion_Est_ID {
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ME_ZERO = 1,
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ME_FULL,
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ME_LOG,
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ME_PHODS,
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ME_EPZS,
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ME_X1
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};
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typedef struct RcOverride{
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int start_frame;
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int end_frame;
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int qscale; // if this is 0 then quality_factor will be used instead
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float quality_factor;
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} RcOverride;
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/* only for ME compatiblity with old apps */
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extern int motion_estimation_method;
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/* ME algos sorted by quality */
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static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
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ME_X1, ME_EPZS, ME_FULL };
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#define FF_MAX_B_FRAMES 8
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/* encoding support
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these flags can be passed in AVCodecContext.flags before initing
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Note: note not everything is supported yet
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*/
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#define CODEC_FLAG_HQ 0x0001 ///< brute force MB-type decission mode (slow)
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#define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
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#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
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#define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
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#define CODEC_FLAG_GMC 0x0020 ///< use GMC
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#define CODEC_FLAG_PART 0x0080 ///< use data partitioning
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/* parent program gurantees that the input for b-frame containing streams is not written to
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for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
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#define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
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#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
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#define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
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#define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
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#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
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#define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
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of only at frame boundaries */
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#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
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#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay / will fail on b frames
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#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
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#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
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#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
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#define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
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/* Fx : Flag for h263+ extra options */
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#define CODEC_FLAG_H263P_AIC 0x01000000 ///< Advanced intra coding
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#define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
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/* For advanced prediction mode, we reuse the 4MV flag */
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/* Unsupported options :
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* Syntax Arithmetic coding (SAC)
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* Deblocking filter internal loop
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* Slice structured
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* Reference Picture Selection
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* Independant Segment Decoding
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* Alternative Inter * VLC
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* Modified Quantization */
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/* /Fx */
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/* codec capabilities */
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
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/**
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* Codec uses get_buffer() for allocating buffers.
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* direct rendering method 1
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*/
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#define CODEC_CAP_DR1 0x0002
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/* if 'parse_only' field is true, then avcodec_parse_frame() can be
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used */
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#define CODEC_CAP_PARSE_ONLY 0x0004
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#define CODEC_CAP_TRUNCATED 0x0008
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#define FF_COMMON_FRAME \
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/**\
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* pointer to the picture planes.\
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* this might be different from the first allocated byte\
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* - encoding: \
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* - decoding: \
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*/\
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uint8_t *data[4];\
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int linesize[4];\
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/**\
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* pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
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* this isnt used by lavc unless the default get/release_buffer() is used\
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* - encoding: \
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* - decoding: \
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*/\
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uint8_t *base[4];\
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/**\
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* 1 -> keyframe, 0-> not\
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* - encoding: set by lavc\
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* - decoding: set by lavc\
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*/\
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int key_frame;\
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\
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/**\
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* picture type of the frame, see ?_TYPE below.\
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* - encoding: set by lavc for coded_picture (and set by user for input)\
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* - decoding: set by lavc\
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*/\
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int pict_type;\
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\
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/**\
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* presentation timestamp in micro seconds (time when frame should be shown to user)\
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* if 0 then the frame_rate will be used as reference\
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* - encoding: MUST be set by user\
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* - decoding: set by lavc\
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*/\
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int64_t pts;\
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\
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/**\
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* picture number in bitstream order.\
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* - encoding: set by\
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* - decoding: set by lavc\
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*/\
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int coded_picture_number;\
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/**\
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* picture number in display order.\
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* - encoding: set by\
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* - decoding: set by lavc\
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*/\
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int display_picture_number;\
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\
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/**\
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* quality (between 1 (good) and 31 (bad)) \
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* - encoding: set by lavc for coded_picture (and set by user for input)\
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* - decoding: set by lavc\
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*/\
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float quality; \
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\
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/**\
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* buffer age (1->was last buffer and dint change, 2->..., ...).\
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* set to something large if the buffer has not been used yet \
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* - encoding: unused\
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* - decoding: MUST be set by get_buffer()\
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*/\
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int age;\
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\
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/**\
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* is this picture used as reference\
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* - encoding: unused\
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* - decoding: set by lavc (before get_buffer() call))\
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*/\
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int reference;\
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\
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/**\
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* QP table\
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* - encoding: unused\
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* - decoding: set by lavc\
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*/\
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int8_t *qscale_table;\
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/**\
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* QP store stride\
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* - encoding: unused\
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* - decoding: set by lavc\
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*/\
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int qstride;\
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\
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/**\
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* mbskip_table[mb]>=1 if MB didnt change\
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* stride= mb_width = (width+15)>>4\
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* - encoding: unused\
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* - decoding: set by lavc\
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*/\
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uint8_t *mbskip_table;\
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\
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/**\
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* for some private data of the user\
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* - encoding: unused\
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* - decoding: set by user\
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*/\
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void *opaque;\
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\
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/**\
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* error\
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* - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
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* - decoding: unused\
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*/\
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uint64_t error[4];\
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\
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/**\
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* type of the buffer (to keep track of who has to dealloc data[*])\
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* - encoding: set by the one who allocs it\
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* - decoding: set by the one who allocs it\
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* Note: user allocated (direct rendering) & internal buffers can not coexist currently\
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*/\
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int type;\
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\
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/**\
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* when decoding, this signal how much the picture must be delayed.\
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* extra_delay = repeat_pict / (2*fps)\
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* - encoding: unused\
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* - decoding: set by lavc\
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*/\
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int repeat_pict;\
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\
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/**\
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* \
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*/\
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int qscale_type;\
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#define FF_QSCALE_TYPE_MPEG1 0
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#define FF_QSCALE_TYPE_MPEG2 1
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#define FF_BUFFER_TYPE_INTERNAL 1
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#define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers
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#define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc
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#define FF_I_TYPE 1 // Intra
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#define FF_P_TYPE 2 // Predicted
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#define FF_B_TYPE 3 // Bi-dir predicted
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#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
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#define FF_SI_TYPE 5
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#define FF_SP_TYPE 6
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/**
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* Audio Video Frame.
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*/
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typedef struct AVFrame {
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FF_COMMON_FRAME
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} AVFrame;
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#define DEFAULT_FRAME_RATE_BASE 1001000
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/**
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* main external api structure.
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*/
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typedef struct AVCodecContext {
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/**
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* the average bitrate.
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* - encoding: set by user. unused for constant quantizer encoding
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* - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
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*/
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int bit_rate;
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/**
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* number of bits the bitstream is allowed to diverge from the reference.
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* the reference can be CBR (for CBR pass1) or VBR (for pass2)
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* - encoding: set by user. unused for constant quantizer encoding
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* - decoding: unused
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*/
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int bit_rate_tolerance;
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/**
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* CODEC_FLAG_*.
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* - encoding: set by user.
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* - decoding: set by user.
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*/
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int flags;
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/**
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* some codecs needs additionnal format info. It is stored here
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* - encoding: set by user.
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* - decoding: set by lavc. (FIXME is this ok?)
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*/
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int sub_id;
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/**
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* motion estimation algorithm used for video coding.
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* - encoding: MUST be set by user.
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* - decoding: unused
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*/
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int me_method;
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/**
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* some codecs need / can use extra-data like huffman tables.
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* mjpeg: huffman tables
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* rv10: additional flags
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* mpeg4: global headers (they can be in the bitstream or here)
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* - encoding: set/allocated/freed by lavc.
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* - decoding: set/allocated/freed by user.
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*/
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void *extradata;
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int extradata_size;
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/* video only */
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/**
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* frames per sec multiplied by frame_rate_base.
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* for variable fps this is the precission, so if the timestamps
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* can be specified in msec precssion then this is 1000*frame_rate_base
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* - encoding: MUST be set by user
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* - decoding: set by lavc. 0 or the frame_rate if available
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*/
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int frame_rate;
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/**
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* width / height.
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* - encoding: MUST be set by user.
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* - decoding: set by user, some codecs might override / change it during playback
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*/
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int width, height;
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#define FF_ASPECT_SQUARE 1
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#define FF_ASPECT_4_3_625 2
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#define FF_ASPECT_4_3_525 3
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#define FF_ASPECT_16_9_625 4
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#define FF_ASPECT_16_9_525 5
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#define FF_ASPECT_EXTENDED 15
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/**
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* the number of pictures in a group of pitures, or 0 for intra_only.
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* - encoding: set by user.
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* - decoding: unused
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*/
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int gop_size;
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/**
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* pixel format, see PIX_FMT_xxx.
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* - encoding: unused
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* - decoding: set by lavc.
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*/
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enum PixelFormat pix_fmt;
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/**
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* Frame rate emulation. If not zero lower layer (i.e. format handler)
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* has to read frames at native frame rate.
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* - encoding: set by user.
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* - decoding: unused.
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*/
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int rate_emu;
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/**
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* if non NULL, 'draw_horiz_band' is called by the libavcodec
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* decoder to draw an horizontal band. It improve cache usage. Not
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* all codecs can do that. You must check the codec capabilities
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* before
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* - encoding: unused
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* - decoding: set by user.
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*/
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void (*draw_horiz_band)(struct AVCodecContext *s,
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uint8_t **src_ptr, int linesize,
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int y, int width, int height);
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/* audio only */
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int sample_rate; ///< samples per sec
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int channels;
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int sample_fmt; ///< sample format, currenly unused
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/* the following data should not be initialized */
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int frame_size; ///< in samples, initialized when calling 'init'
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int frame_number; ///< audio or video frame number
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int real_pict_num; ///< returns the real picture number of previous encoded frame
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/**
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* number of frames the decoded output will be delayed relative to
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* the encoded input.
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* - encoding: set by lavc.
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* - decoding: unused
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*/
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int delay;
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/* - encoding parameters */
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float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
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float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
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/**
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* minimum quantizer.
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* - encoding: set by user.
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* - decoding: unused
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*/
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int qmin;
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/**
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* maximum quantizer.
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* - encoding: set by user.
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* - decoding: unused
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*/
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int qmax;
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/**
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* maximum quantizer difference etween frames.
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* - encoding: set by user.
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* - decoding: unused
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*/
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int max_qdiff;
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/**
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* maximum number of b frames between non b frames.
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* note: the output will be delayed by max_b_frames+1 relative to the input
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* - encoding: set by user.
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* - decoding: unused
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*/
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int max_b_frames;
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/**
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* qscale factor between ip and b frames.
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* - encoding: set by user.
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* - decoding: unused
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*/
|
|
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: unused
|
|
* - 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
|
|
* - 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
|
|
|
|
/**
|
|
* 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
|
|
|
|
/**
|
|
* 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;
|
|
} 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;
|
|
} AVCodec;
|
|
|
|
/**
|
|
* four components are given, that's all.
|
|
* the last component is alpha
|
|
*/
|
|
typedef struct AVPicture {
|
|
uint8_t *data[4];
|
|
int linesize[4];
|
|
} AVPicture;
|
|
|
|
extern AVCodec ac3_encoder;
|
|
extern AVCodec mp2_encoder;
|
|
extern AVCodec mp3lame_encoder;
|
|
extern AVCodec oggvorbis_encoder;
|
|
extern AVCodec mpeg1video_encoder;
|
|
extern AVCodec h263_encoder;
|
|
extern AVCodec h263p_encoder;
|
|
extern AVCodec rv10_encoder;
|
|
extern AVCodec mjpeg_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 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 mpeg_decoder;
|
|
extern AVCodec h263i_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 aac_decoder;
|
|
extern AVCodec mpeg4aac_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_MS, adpcm_ms);
|
|
|
|
#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);
|
|
|
|
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 */
|
|
/**
|
|
* 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 */
|