FFmpeg
Macros | Functions
mpegvideo.c File Reference
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "h264chroma.h"
#include "idctdsp.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.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 ALLOCZ_ARRAYS(p, mult, numb)   ((p) = av_calloc(numb, mult * sizeof(*(p))))
 
#define IS_ENCODER(s)   (CONFIG_MPEGVIDEOENC && !lowres_flag && (s)->encoding)
 
#define IS_MPEG12(s)   (CONFIG_SMALL ? ((s)->out_format == FMT_MPEG1) : is_mpeg12)
 

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 init_duplicate_context (MpegEncContext *s)
 
int ff_mpv_init_duplicate_contexts (MpegEncContext *s)
 Initialize an MpegEncContext's thread contexts. More...
 
static void free_duplicate_context (MpegEncContext *s)
 
static void free_duplicate_contexts (MpegEncContext *s)
 
static void backup_duplicate_context (MpegEncContext *bak, MpegEncContext *src)
 
int ff_update_duplicate_context (MpegEncContext *dst, MpegEncContext *src)
 
void ff_mpv_common_defaults (MpegEncContext *s)
 Set the given MpegEncContext to common defaults (same for encoding and decoding). More...
 
int ff_mpv_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...
 
void ff_mpv_free_context_frame (MpegEncContext *s)
 Frees and resets MpegEncContext fields depending on the resolution as well as the slice thread contexts. More...
 
void ff_mpv_common_end (MpegEncContext *s)
 
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_init_block_index (MpegEncContext *s)
 
void ff_set_qscale (MpegEncContext *s, int qscale)
 set qscale and update qscale dependent variables. More...
 

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

◆ ALLOCZ_ARRAYS

#define ALLOCZ_ARRAYS (   p,
  mult,
  numb 
)    ((p) = av_calloc(numb, mult * sizeof(*(p))))

◆ IS_ENCODER

#define IS_ENCODER (   s)    (CONFIG_MPEGVIDEOENC && !lowres_flag && (s)->encoding)

◆ IS_MPEG12

#define IS_MPEG12 (   s)    (CONFIG_SMALL ? ((s)->out_format == FMT_MPEG1) : is_mpeg12)

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 49 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 78 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 107 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 137 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 171 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 205 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 239 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 266 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 272 of file mpegvideo.c.

Referenced by dct_init().

◆ dct_init()

static av_cold int dct_init ( MpegEncContext s)
static

Definition at line 279 of file mpegvideo.c.

Referenced by ff_mpv_common_init(), and main().

◆ ff_mpv_idct_init()

av_cold void ff_mpv_idct_init ( MpegEncContext s)

◆ init_duplicate_context()

static int init_duplicate_context ( MpegEncContext s)
static

Definition at line 346 of file mpegvideo.c.

Referenced by ff_mpv_init_duplicate_contexts().

◆ ff_mpv_init_duplicate_contexts()

int ff_mpv_init_duplicate_contexts ( MpegEncContext s)

Initialize an MpegEncContext's thread contexts.

Presumes that slice_context_count is already set and that all the fields that are freed/reset in free_duplicate_context() are NULL.

Definition at line 396 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 420 of file mpegvideo.c.

Referenced by free_duplicate_contexts().

◆ free_duplicate_contexts()

static void free_duplicate_contexts ( MpegEncContext s)
static

Definition at line 442 of file mpegvideo.c.

Referenced by ff_mpv_free_context_frame().

◆ backup_duplicate_context()

static void backup_duplicate_context ( MpegEncContext bak,
MpegEncContext src 
)
static

Definition at line 451 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 481 of file mpegvideo.c.

Referenced by decode_chunks(), and encode_picture().

◆ 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 512 of file mpegvideo.c.

Referenced by ff_mpv_decode_init(), and mpv_encode_defaults().

◆ ff_mpv_init_context_frame()

int ff_mpv_init_context_frame ( MpegEncContext s)

Initialize and allocates MpegEncContext fields dependent on the resolution.

Definition at line 530 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 664 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 746 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(), h261_decode_frame(), mpeg_decode_postinit(), rv10_decode_init(), rv20_decode_picture_header(), svq1_encode_init(), and vcr2_init_sequence().

◆ ff_mpv_free_context_frame()

void ff_mpv_free_context_frame ( MpegEncContext s)

Frees and resets MpegEncContext fields depending on the resolution as well as the slice thread contexts.

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

Definition at line 833 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

◆ ff_mpv_common_end()

void ff_mpv_common_end ( MpegEncContext s)

◆ 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 939 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 986 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 1125 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
scontext
dest_yluma destination pointer
dest_cbchroma cb/u destination pointer
dest_crchroma cr/v destination pointer
dirdirection (0->forward, 1->backward)
ref_picturearray[3] of pointers to the 3 planes of the reference picture
pix_ophalfpel 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 1193 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 1327 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 1363 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 1371 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 1379 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 1392 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 1433 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] 
)

◆ ff_init_block_index()

void ff_init_block_index ( MpegEncContext s)

◆ ff_set_qscale()

void ff_set_qscale ( MpegEncContext s,
int  qscale 
)