mpegvideo_enc.c File Reference

The simplest mpeg encoder (well, it was the simplest!). More...

#include <stdint.h>
#include "libavutil/internal.h"
#include "libavutil/intmath.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "libavutil/timer.h"
#include "avcodec.h"
#include "dct.h"
#include "idctdsp.h"
#include "mpeg12.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
#include "h261.h"
#include "h263.h"
#include "h263data.h"
#include "mjpegenc_common.h"
#include "mathops.h"
#include "mpegutils.h"
#include "mjpegenc.h"
#include "msmpeg4.h"
#include "pixblockdsp.h"
#include "qpeldsp.h"
#include "faandct.h"
#include "thread.h"
#include "aandcttab.h"
#include "flv.h"
#include "mpeg4video.h"
#include "internal.h"
#include "bytestream.h"
#include "wmv2.h"
#include "rv10.h"
#include "libxvid.h"
#include <limits.h>
#include "sp5x.h"

Macros
#define	QUANT_BIAS_SHIFT   8
#define	QMAT_SHIFT_MMX   16
#define	QMAT_SHIFT   21
#define	COPY(a)   dst->a= src->a
#define	MERGE(field)   dst->field += src->field; src->field=0
#define	OFFSET(x)   offsetof(MpegEncContext, x)
#define	VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Functions
void	ff_convert_matrix (MpegEncContext *s, int(*qmat)[64], uint16_t(*qmat16)[2][64], const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra)
void	ff_write_quant_matrix (PutBitContext *pb, uint16_t *matrix)
void	ff_init_qscale_tab (MpegEncContext *s)
	init s->current_picture.qscale_table from s->lambda_table
av_cold int	ff_dct_encode_init (MpegEncContext *s)
av_cold int	ff_mpv_encode_init (AVCodecContext *avctx)
av_cold int	ff_mpv_encode_end (AVCodecContext *avctx)
int	ff_mpv_encode_picture (AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic_arg, int *got_packet)
int	ff_mpv_reallocate_putbitbuffer (MpegEncContext *s, size_t threshold, size_t size_increase)
void	ff_block_permute (int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last)
	Permute an 8x8 block according to permutation. More...
int	ff_dct_quantize_c (MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow)

Variables
const AVOption	ff_mpv_generic_options []
AVCodec	ff_h263_encoder
AVCodec	ff_h263p_encoder
AVCodec	ff_msmpeg4v2_encoder
AVCodec	ff_msmpeg4v3_encoder
AVCodec	ff_wmv1_encoder

Detailed Description

The simplest mpeg encoder (well, it was the simplest!).

Function Documentation

ff_block_permute()

void ff_block_permute	(	int16_t *	block,
		uint8_t *	permutation,
		const uint8_t *	scantable,
		int	last
	)

Permute an 8x8 block according to permutation.

Parameters

block	the block which will be permuted according to the given permutation vector
permutation	the permutation vector
last	the last non zero coefficient in scantable order, used to speed the permutation up
scantable	the used scantable, this is only used to speed the permutation up, the block is not (inverse) permutated to scantable order!

Variable Documentation

ff_h263_encoder

AVCodec ff_h263_encoder

Initial value:

= {
    .name           = "h263",
    .long_name      = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_H263,
    .priv_data_size = sizeof(MpegEncContext),
    .init           = ff_mpv_encode_init,
    .encode2        = ff_mpv_encode_picture,
    .close          = ff_mpv_encode_end,
    .pix_fmts= (const enum AVPixelFormat[]){AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE},
    .priv_class     = &h263_class,
}

ff_h263p_encoder

AVCodec ff_h263p_encoder

Initial value:

= {
    .name           = "h263p",
    .long_name      = NULL_IF_CONFIG_SMALL("H.263+ / H.263-1998 / H.263 version 2"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_H263P,
    .priv_data_size = sizeof(MpegEncContext),
    .init           = ff_mpv_encode_init,
    .encode2        = ff_mpv_encode_picture,
    .close          = ff_mpv_encode_end,
    .capabilities   = AV_CODEC_CAP_SLICE_THREADS,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    .priv_class     = &h263p_class,
}

ff_mpv_generic_options

const AVOption ff_mpv_generic_options[]

Initial value:

= {
    FF_MPV_COMMON_OPTS
    { NULL },
}

ff_msmpeg4v2_encoder

AVCodec ff_msmpeg4v2_encoder

Initial value:

= {
    .name           = "msmpeg4v2",
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 2"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MSMPEG4V2,
    .priv_data_size = sizeof(MpegEncContext),
    .init           = ff_mpv_encode_init,
    .encode2        = ff_mpv_encode_picture,
    .close          = ff_mpv_encode_end,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    .priv_class     = &msmpeg4v2_class,
}

ff_msmpeg4v3_encoder

AVCodec ff_msmpeg4v3_encoder

Initial value:

= {
    .name           = "msmpeg4",
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 Microsoft variant version 3"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MSMPEG4V3,
    .priv_data_size = sizeof(MpegEncContext),
    .init           = ff_mpv_encode_init,
    .encode2        = ff_mpv_encode_picture,
    .close          = ff_mpv_encode_end,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    .priv_class     = &msmpeg4v3_class,
}

ff_wmv1_encoder

AVCodec ff_wmv1_encoder

Initial value:

= {
    .name           = "wmv1",
    .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Video 7"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_WMV1,
    .priv_data_size = sizeof(MpegEncContext),
    .init           = ff_mpv_encode_init,
    .encode2        = ff_mpv_encode_picture,
    .close          = ff_mpv_encode_end,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    .priv_class     = &wmv1_class,
}