mpegvideo.c File Reference

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

#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/motion_vector.h"
#include "libavutil/timer.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "h264chroma.h"
#include "idctdsp.h"
#include "internal.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
#include "mjpegenc.h"
#include "msmpeg4.h"
#include "qpeldsp.h"
#include "thread.h"
#include "wmv2.h"
#include <limits.h>

Go to the source code of this file.

Macros
#define	COPY(a)   bak->a = src->a
#define	UPDATE_PICTURE(pic)
#define	REBASE_PICTURE(pic, new_ctx, old_ctx)

Functions
static void	dct_unquantize_mpeg1_intra_c (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	dct_unquantize_mpeg1_inter_c (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	dct_unquantize_mpeg2_intra_c (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	dct_unquantize_mpeg2_intra_bitexact (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	dct_unquantize_mpeg2_inter_c (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	dct_unquantize_h263_intra_c (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	dct_unquantize_h263_inter_c (MpegEncContext *s, int16_t *block, int n, int qscale)
static void	gray16 (uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
static void	gray8 (uint8_t *dst, const uint8_t *src, ptrdiff_t linesize, int h)
static av_cold int	dct_init (MpegEncContext *s)
av_cold void	ff_mpv_idct_init (MpegEncContext *s)
static int	alloc_picture (MpegEncContext *s, Picture *pic, int shared)
static int	init_duplicate_context (MpegEncContext *s)
static void	free_duplicate_context (MpegEncContext *s)
static void	backup_duplicate_context (MpegEncContext *bak, MpegEncContext *src)
int	ff_update_duplicate_context (MpegEncContext *dst, MpegEncContext *src)
int	ff_mpeg_update_thread_context (AVCodecContext *dst, const AVCodecContext *src)
void	ff_mpv_common_defaults (MpegEncContext *s)
	Set the given MpegEncContext to common defaults (same for encoding and decoding). More...
void	ff_mpv_decode_defaults (MpegEncContext *s)
	Set the given MpegEncContext to defaults for decoding. More...
void	ff_mpv_decode_init (MpegEncContext *s, AVCodecContext *avctx)
static int	init_context_frame (MpegEncContext *s)
	Initialize and allocates MpegEncContext fields dependent on the resolution. More...
static void	clear_context (MpegEncContext *s)
av_cold int	ff_mpv_common_init (MpegEncContext *s)
	init common structure for both encoder and decoder. More...
static void	free_context_frame (MpegEncContext *s)
	Frees and resets MpegEncContext fields depending on the resolution. More...
int	ff_mpv_common_frame_size_change (MpegEncContext *s)
void	ff_mpv_common_end (MpegEncContext *s)
static void	gray_frame (AVFrame *frame)
int	ff_mpv_frame_start (MpegEncContext *s, AVCodecContext *avctx)
	generic function called after decoding the header and before a frame is decoded. More...
void	ff_mpv_frame_end (MpegEncContext *s)
void	ff_print_debug_info (MpegEncContext *s, Picture *p, AVFrame *pict)
int	ff_mpv_export_qp_table (MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
static int	hpel_motion_lowres (MpegEncContext *s, uint8_t *dest, uint8_t *src, int field_based, int field_select, int src_x, int src_y, int width, int height, ptrdiff_t stride, int h_edge_pos, int v_edge_pos, int w, int h, h264_chroma_mc_func *pix_op, int motion_x, int motion_y)
static av_always_inline void	mpeg_motion_lowres (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t **ref_picture, h264_chroma_mc_func *pix_op, int motion_x, int motion_y, int h, int mb_y)
static void	chroma_4mv_motion_lowres (MpegEncContext *s, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t **ref_picture, h264_chroma_mc_func *pix_op, int mx, int my)
static void	MPV_motion_lowres (MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t **ref_picture, h264_chroma_mc_func *pix_op)
	motion compensation of a single macroblock More...
static int	lowest_referenced_row (MpegEncContext *s, int dir)
	find the lowest MB row referenced in the MVs More...
static void	put_dct (MpegEncContext *s, int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
static void	add_dct (MpegEncContext *s, int16_t *block, int i, uint8_t *dest, int line_size)
static void	add_dequant_dct (MpegEncContext *s, int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
void	ff_clean_intra_table_entries (MpegEncContext *s)
	Clean dc, ac, coded_block for the current non-intra MB. More...
static av_always_inline void	mpv_reconstruct_mb_internal (MpegEncContext *s, int16_t block[12][64], int lowres_flag, int is_mpeg12)
void	ff_mpv_reconstruct_mb (MpegEncContext *s, int16_t block[12][64])
void	ff_mpeg_draw_horiz_band (MpegEncContext *s, int y, int h)
void	ff_init_block_index (MpegEncContext *s)
void	ff_mpeg_flush (AVCodecContext *avctx)
void	ff_set_qscale (MpegEncContext *s, int qscale)
	set qscale and update qscale dependent variables. More...
void	ff_mpv_report_decode_progress (MpegEncContext *s)

Detailed Description

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

Definition in file mpegvideo.c.

Macro Definition Documentation

COPY

#define COPY

(

a

)

bak->a = src->a

Referenced by backup_duplicate_context().

UPDATE_PICTURE

#define UPDATE_PICTURE

(

pic

)

Value:

do {\
    ff_mpeg_unref_picture(s->avctx, &s->pic);\
    if (s1->pic.f && s1->pic.f->buf[0])\
        ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\
    else\
        ret = ff_update_picture_tables(&s->pic, &s1->pic);\
    if (ret < 0)\
        return ret;\
} while (0)

Referenced by ff_mpeg_update_thread_context().

REBASE_PICTURE

#define REBASE_PICTURE	(		pic,
			new_ctx,
			old_ctx
	)

Value:

((pic && pic >= old_ctx->picture &&                                       \
      pic < old_ctx->picture + MAX_PICTURE_COUNT) ?                           \
        &new_ctx->picture[pic - old_ctx->picture] : NULL)

Referenced by ff_mpeg_update_thread_context().

Function Documentation

dct_unquantize_mpeg1_intra_c()

static void dct_unquantize_mpeg1_intra_c ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 53 of file mpegvideo.c.

Referenced by dct_init().

dct_unquantize_mpeg1_inter_c()

static void dct_unquantize_mpeg1_inter_c ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 82 of file mpegvideo.c.

Referenced by dct_init().

dct_unquantize_mpeg2_intra_c()

static void dct_unquantize_mpeg2_intra_c ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 111 of file mpegvideo.c.

Referenced by dct_init().

dct_unquantize_mpeg2_intra_bitexact()

static void dct_unquantize_mpeg2_intra_bitexact ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 141 of file mpegvideo.c.

Referenced by dct_init().

dct_unquantize_mpeg2_inter_c()

static void dct_unquantize_mpeg2_inter_c ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 175 of file mpegvideo.c.

Referenced by dct_init().

dct_unquantize_h263_intra_c()

static void dct_unquantize_h263_intra_c ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 209 of file mpegvideo.c.

Referenced by dct_init().

dct_unquantize_h263_inter_c()

static void dct_unquantize_h263_inter_c ( MpegEncContext *  s, int16_t *  block, int  n, int  qscale  )

static

Definition at line 243 of file mpegvideo.c.

Referenced by dct_init().

gray16()

static void gray16 ( uint8_t *  dst, const uint8_t *  src, ptrdiff_t  linesize, int  h  )

static

Definition at line 270 of file mpegvideo.c.

Referenced by dct_init().

gray8()

static void gray8 ( uint8_t *  dst, const uint8_t *  src, ptrdiff_t  linesize, int  h  )

static

Definition at line 276 of file mpegvideo.c.

Referenced by dct_init().

dct_init()

static av_cold int dct_init ( MpegEncContext *  s )

static

Definition at line 283 of file mpegvideo.c.

Referenced by ff_mpv_common_init(), fft_end(), and main().

ff_mpv_idct_init()

av_cold void ff_mpv_idct_init

(

MpegEncContext *

s

)

Definition at line 330 of file mpegvideo.c.

Referenced by dnxhd_encode_init(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mpeg4_workaround_bugs(), ff_mpeg_update_thread_context(), ff_mpv_encode_init(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), h261_decode_frame(), mpeg_decode_init(), mpeg_decode_postinit(), rv10_decode_init(), and vcr2_init_sequence().

alloc_picture()

static int alloc_picture ( MpegEncContext *  s, Picture *  pic, int  shared  )

static

Definition at line 348 of file mpegvideo.c.

Referenced by ff_mpv_frame_start().

init_duplicate_context()

static int init_duplicate_context ( MpegEncContext *  s )

static

Definition at line 356 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), and ff_mpv_common_init().

free_duplicate_context()

static void free_duplicate_context ( MpegEncContext *  s )

static

Definition at line 411 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

backup_duplicate_context()

static void backup_duplicate_context ( MpegEncContext *  bak, MpegEncContext *  src  )

static

Definition at line 432 of file mpegvideo.c.

Referenced by ff_update_duplicate_context().

ff_update_duplicate_context()

int ff_update_duplicate_context	(	MpegEncContext *	dst,
		MpegEncContext *	src
	)

Definition at line 460 of file mpegvideo.c.

Referenced by decode_chunks(), and encode_picture().

ff_mpeg_update_thread_context()

int ff_mpeg_update_thread_context	(	AVCodecContext *	dst,
		const AVCodecContext *	src
	)

Definition at line 488 of file mpegvideo.c.

Referenced by ff_mpeg4_frame_end(), ff_rv34_decode_update_thread_context(), and mpeg_decode_init().

ff_mpv_common_defaults()

void ff_mpv_common_defaults

(

MpegEncContext *

s

)

Set the given MpegEncContext to common defaults (same for encoding and decoding).

The changed fields will not depend upon the prior state of the MpegEncContext.

Definition at line 639 of file mpegvideo.c.

Referenced by ff_mpv_decode_defaults(), and mpv_encode_defaults().

ff_mpv_decode_defaults()

void ff_mpv_decode_defaults

(

MpegEncContext *

s

)

Set the given MpegEncContext to defaults for decoding.

the changed fields will not depend upon the prior state of the MpegEncContext.

Definition at line 662 of file mpegvideo.c.

Referenced by ff_h263_decode_init(), ff_rv34_decode_init(), h261_decode_init(), mpeg_decode_init(), and rv10_decode_init().

ff_mpv_decode_init()

void ff_mpv_decode_init	(	MpegEncContext *	s,
		AVCodecContext *	avctx
	)

Definition at line 667 of file mpegvideo.c.

Referenced by ff_h263_decode_init(), ff_rv34_decode_init(), h261_decode_init(), mpeg_decode_init(), and rv10_decode_init().

init_context_frame()

static int init_context_frame ( MpegEncContext *  s )

static

Initialize and allocates MpegEncContext fields dependent on the resolution.

Definition at line 682 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), and ff_mpv_common_init().

clear_context()

static void clear_context ( MpegEncContext *  s )

static

Definition at line 803 of file mpegvideo.c.

Referenced by ff_mpv_common_init().

ff_mpv_common_init()

av_cold int ff_mpv_common_init

(

MpegEncContext *

s

)

init common structure for both encoder and decoder.

this assumes that some variables like width/height are already set

Definition at line 883 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), ff_h263_decode_init(), ff_mpeg_update_thread_context(), ff_mpv_encode_init(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), h261_decode_frame(), mpeg_decode_postinit(), rv10_decode_init(), rv20_decode_picture_header(), svq1_encode_init(), and vcr2_init_sequence().

free_context_frame()

static void free_context_frame ( MpegEncContext *  s )

static

Frees and resets MpegEncContext fields depending on the resolution.

Is used during resolution changes to avoid a full reinitialization of the codec.

Definition at line 994 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

ff_mpv_common_frame_size_change()

int ff_mpv_common_frame_size_change

(

MpegEncContext *

s

)

Definition at line 1043 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), ff_mpeg_update_thread_context(), ff_rv34_decode_frame(), and ff_rv34_decode_update_thread_context().

ff_mpv_common_end()

void ff_mpv_common_end

(

MpegEncContext *

s

)

Definition at line 1122 of file mpegvideo.c.

Referenced by ff_h263_decode_end(), ff_mpv_common_frame_size_change(), ff_mpv_common_init(), ff_mpv_encode_end(), ff_rv34_decode_end(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), ff_vc1_decode_end(), h261_decode_end(), h261_decode_frame(), mpeg_decode_end(), mpeg_decode_postinit(), rv10_decode_end(), rv20_decode_picture_header(), svq1_encode_end(), vc1_decode_frame(), and vcr2_init_sequence().

gray_frame()

static void gray_frame ( AVFrame *  frame )

static

Definition at line 1176 of file mpegvideo.c.

Referenced by ff_mpv_frame_start().

ff_mpv_frame_start()

int ff_mpv_frame_start	(	MpegEncContext *	s,
		AVCodecContext *	avctx
	)

generic function called after decoding the header and before a frame is decoded.

Definition at line 1196 of file mpegvideo.c.

Referenced by decode_wmv9(), ff_h263_decode_frame(), ff_rv34_decode_frame(), h261_decode_frame(), mpeg_field_start(), rv10_decode_packet(), and vc1_decode_frame().

ff_mpv_frame_end()

void ff_mpv_frame_end

(

MpegEncContext *

s

)

Definition at line 1420 of file mpegvideo.c.

Referenced by decode_wmv9(), ff_h263_decode_frame(), ff_rv34_decode_frame(), finish_frame(), h261_decode_frame(), rv10_decode_frame(), rv10_decode_packet(), slice_end(), and vc1_decode_frame().

ff_print_debug_info()

void ff_print_debug_info	(	MpegEncContext *	s,
		Picture *	p,
		AVFrame *	pict
	)

Definition at line 1428 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), finish_frame(), h261_decode_frame(), rv10_decode_frame(), slice_end(), and vc1_decode_frame().

ff_mpv_export_qp_table()

int ff_mpv_export_qp_table	(	MpegEncContext *	s,
		AVFrame *	f,
		Picture *	p,
		int	qp_type
	)

Definition at line 1435 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), finish_frame(), rv10_decode_frame(), and slice_end().

hpel_motion_lowres()

static int hpel_motion_lowres ( MpegEncContext *  s, uint8_t *  dest, uint8_t *  src, int  field_based, int  field_select, int  src_x, int  src_y, int  width, int  height, ptrdiff_t  stride, int  h_edge_pos, int  v_edge_pos, int  w, int  h, h264_chroma_mc_func *  pix_op, int  motion_x, int  motion_y  )

inlinestatic

Definition at line 1447 of file mpegvideo.c.

Referenced by MPV_motion_lowres().

mpeg_motion_lowres()

static av_always_inline void mpeg_motion_lowres ( MpegEncContext *  s, uint8_t *  dest_y, uint8_t *  dest_cb, uint8_t *  dest_cr, int  field_based, int  bottom_field, int  field_select, uint8_t **  ref_picture, h264_chroma_mc_func *  pix_op, int  motion_x, int  motion_y, int  h, int  mb_y  )

static

Definition at line 1494 of file mpegvideo.c.

Referenced by MPV_motion_lowres().

chroma_4mv_motion_lowres()

static void chroma_4mv_motion_lowres ( MpegEncContext *  s, uint8_t *  dest_cb, uint8_t *  dest_cr, uint8_t **  ref_picture, h264_chroma_mc_func *  pix_op, int  mx, int  my  )

inlinestatic

Definition at line 1633 of file mpegvideo.c.

Referenced by MPV_motion_lowres().

MPV_motion_lowres()

static void MPV_motion_lowres ( MpegEncContext *  s, uint8_t *  dest_y, uint8_t *  dest_cb, uint8_t *  dest_cr, int  dir, uint8_t **  ref_picture, h264_chroma_mc_func *  pix_op  )

inlinestatic

motion compensation of a single macroblock

Parameters

s	context
dest_y	luma destination pointer
dest_cb	chroma cb/u destination pointer
dest_cr	chroma cr/v destination pointer
dir	direction (0->forward, 1->backward)
ref_picture	array[3] of pointers to the 3 planes of the reference picture
pix_op	halfpel motion compensation function (average or put normally) the motion vectors are taken from s->mv and the MV type from s->mv_type

Definition at line 1701 of file mpegvideo.c.

Referenced by mpv_reconstruct_mb_internal().

lowest_referenced_row()

static int lowest_referenced_row ( MpegEncContext *  s, int  dir  )

static

find the lowest MB row referenced in the MVs

Definition at line 1835 of file mpegvideo.c.

Referenced by mpv_reconstruct_mb_internal().

put_dct()

static void put_dct ( MpegEncContext *  s, int16_t *  block, int  i, uint8_t *  dest, int  line_size, int  qscale  )

inlinestatic

Definition at line 1871 of file mpegvideo.c.

Referenced by mpv_reconstruct_mb_internal().

add_dct()

static void add_dct ( MpegEncContext *  s, int16_t *  block, int  i, uint8_t *  dest, int  line_size  )

inlinestatic

Definition at line 1879 of file mpegvideo.c.

Referenced by mpv_reconstruct_mb_internal().

add_dequant_dct()

static void add_dequant_dct ( MpegEncContext *  s, int16_t *  block, int  i, uint8_t *  dest, int  line_size, int  qscale  )

inlinestatic

Definition at line 1887 of file mpegvideo.c.

Referenced by mpv_reconstruct_mb_internal().

ff_clean_intra_table_entries()

void ff_clean_intra_table_entries

(

MpegEncContext *

s

)

Clean dc, ac, coded_block for the current non-intra MB.

Definition at line 1900 of file mpegvideo.c.

Referenced by encode_thread(), mpeg4_decode_partition_a(), and mpv_reconstruct_mb_internal().

mpv_reconstruct_mb_internal()

static av_always_inline void mpv_reconstruct_mb_internal ( MpegEncContext *  s, int16_t  block[12][64], int  lowres_flag, int  is_mpeg12  )

static

Definition at line 1941 of file mpegvideo.c.

Referenced by ff_mpv_reconstruct_mb().

ff_mpv_reconstruct_mb()

void ff_mpv_reconstruct_mb	(	MpegEncContext *	s,
		int16_t	block[12][64]
	)

Definition at line 2212 of file mpegvideo.c.

Referenced by decode_slice(), encode_mb_hq(), encode_thread(), h261_decode_mb(), h261_decode_mb_skipped(), mpeg_decode_slice(), mpeg_er_decode_mb(), and rv10_decode_packet().

ff_mpeg_draw_horiz_band()

void ff_mpeg_draw_horiz_band	(	MpegEncContext *	s,
		int	y,
		int	h
	)

Definition at line 2224 of file mpegvideo.c.

Referenced by decode_slice(), dxva2_mpeg2_end_frame(), dxva2_vc1_end_frame(), ff_vdpau_common_end_frame(), ff_xvmc_decode_mb(), ff_xvmc_field_end(), mpeg_decode_slice(), vaapi_mpeg2_end_frame(), vaapi_mpeg4_end_frame(), vaapi_vc1_end_frame(), vc1_decode_b_blocks(), vc1_decode_i_blocks(), vc1_decode_i_blocks_adv(), vc1_decode_p_blocks(), and vc1_decode_skip_blocks().

ff_init_block_index()

void ff_init_block_index

(

MpegEncContext *

s

)

Definition at line 2231 of file mpegvideo.c.

Referenced by decode_slice(), encode_thread(), estimate_motion_thread(), ff_h261_reorder_mb_index(), h261_decode_mb(), h261_decode_mb_skipped(), init_block_index(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg_decode_slice(), mpeg_er_decode_mb(), rv10_decode_packet(), and rv34_decode_slice().

ff_mpeg_flush()

void ff_mpeg_flush

(

AVCodecContext *

avctx

)

Definition at line 2264 of file mpegvideo.c.

Referenced by decode_wmv9(), and flush().

ff_set_qscale()

void ff_set_qscale	(	MpegEncContext *	s,
		int	qscale
	)

set qscale and update qscale dependent variables.

Definition at line 2295 of file mpegvideo.c.

Referenced by decode_slice(), encode_mb_internal(), encode_thread(), ff_h261_encode_mb(), h261_decode_gob(), h261_decode_mb(), h263_decode_dquant(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg4_decode_partitioned_mb(), and rv10_decode_packet().

ff_mpv_report_decode_progress()

void ff_mpv_report_decode_progress

(

MpegEncContext *

s

)

Definition at line 2309 of file mpegvideo.c.

Referenced by decode_slice(), and mpeg_decode_slice().