FFmpeg
Macros | Functions
mpegvideo.c File Reference
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/motion_vector.h"
#include "libavutil/video_enc_params.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)
 
static int init_duplicate_context (MpegEncContext *s)
 
static int 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)
 
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_init (MpegEncContext *s, AVCodecContext *avctx)
 Initialize the given MpegEncContext for decoding. More...
 
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 as well as the slice thread contexts. 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

◆ 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)

◆ 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)

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 54 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 83 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 112 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 142 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 176 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 210 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 244 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 271 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 277 of file mpegvideo.c.

Referenced by dct_init().

◆ dct_init()

static av_cold int dct_init ( MpegEncContext s)
static

Definition at line 284 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)

◆ alloc_picture()

static int alloc_picture ( MpegEncContext s,
Picture pic 
)
static

Definition at line 351 of file mpegvideo.c.

Referenced by ff_mpv_frame_start().

◆ init_duplicate_context()

static int init_duplicate_context ( MpegEncContext s)
static

Definition at line 359 of file mpegvideo.c.

Referenced by init_duplicate_contexts().

◆ init_duplicate_contexts()

static int init_duplicate_contexts ( MpegEncContext s)
static

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 414 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 438 of file mpegvideo.c.

Referenced by free_duplicate_contexts().

◆ free_duplicate_contexts()

static void free_duplicate_contexts ( MpegEncContext s)
static

Definition at line 460 of file mpegvideo.c.

Referenced by free_context_frame().

◆ backup_duplicate_context()

static void backup_duplicate_context ( MpegEncContext bak,
MpegEncContext src 
)
static

Definition at line 469 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 499 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 524 of file mpegvideo.c.

Referenced by ff_rv34_decode_update_thread_context().

◆ 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 676 of file mpegvideo.c.

Referenced by ff_mpv_decode_init(), and mpv_encode_defaults().

◆ ff_mpv_decode_init()

void ff_mpv_decode_init ( MpegEncContext s,
AVCodecContext avctx 
)

Initialize the given MpegEncContext for decoding.

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

Definition at line 699 of file mpegvideo.c.

Referenced by ff_h263_decode_init(), ff_rv34_decode_init(), h261_decode_init(), ipu_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 716 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 831 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 913 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().

◆ free_context_frame()

static void free_context_frame ( MpegEncContext s)
static

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 1006 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)

◆ ff_mpv_common_end()

void ff_mpv_common_end ( MpegEncContext s)

◆ gray_frame()

static void gray_frame ( AVFrame frame)
static

Definition at line 1165 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 1185 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)

◆ ff_print_debug_info()

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

◆ ff_mpv_export_qp_table()

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

Definition at line 1424 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 1455 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 1502 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 1641 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 1709 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 1843 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 1879 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 1887 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 1895 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 1908 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 1949 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_mpeg_draw_horiz_band()

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

◆ ff_init_block_index()

void ff_init_block_index ( MpegEncContext s)

◆ ff_mpeg_flush()

void ff_mpeg_flush ( AVCodecContext avctx)

Definition at line 2304 of file mpegvideo.c.

Referenced by decode_wmv9(), and flush().

◆ ff_set_qscale()

void ff_set_qscale ( MpegEncContext s,
int  qscale 
)

◆ ff_mpv_report_decode_progress()

void ff_mpv_report_decode_progress ( MpegEncContext s)

Definition at line 2351 of file mpegvideo.c.

Referenced by decode_slice(), and mpeg_decode_slice().

MAX_PICTURE_COUNT
#define MAX_PICTURE_COUNT
Definition: mpegpicture.h:32
s
#define s(width, name)
Definition: cbs_vp9.c:257
s1
#define s1
Definition: regdef.h:38
NULL
#define NULL
Definition: coverity.c:32
ff_mpeg_ref_picture
int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src)
Definition: mpegpicture.c:355
ff_update_picture_tables
int ff_update_picture_tables(Picture *dst, Picture *src)
Definition: mpegpicture.c:317
ret
ret
Definition: filter_design.txt:187