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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)
 
#define COLOR(theta, r)
 

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...
 
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)
 
static int clip_line (int *sx, int *sy, int *ex, int *ey, int maxx)
 
static void draw_line (uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color)
 Draw a line from (ex, ey) -> (sx, sy). More...
 
static void draw_arrow (uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color, int tail, int direction)
 Draw an arrow from (ex, ey) -> (sx, sy). More...
 
static int add_mb (AVMotionVector *mb, uint32_t mb_type, int dst_x, int dst_y, int src_x, int src_y, int direction)
 
void ff_print_debug_info2 (AVCodecContext *avctx, AVFrame *pict, uint8_t *mbskip_table, uint32_t *mbtype_table, int8_t *qscale_table, int16_t(*motion_val[2])[2], int *low_delay, int mb_width, int mb_height, int mb_stride, int quarter_sample)
 Print debugging info for the given picture. More...
 
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_decode_mb_internal (MpegEncContext *s, int16_t block[12][64], int lowres_flag, int is_mpeg12)
 
void ff_mpv_decode_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

#define COPY (   a)    bak->a = src->a
#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);\
if (ret < 0)\
} while (0)
const char * s
Definition: avisynth_c.h:631
int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src)
Definition: mpegpicture.c:354
if()
Definition: avfilter.c:975
return
ret
Definition: avfilter.c:974
#define s1
Definition: regdef.h:38
void ff_mpeg_unref_picture(AVCodecContext *avctx, Picture *pic)
Deallocate a picture.
Definition: mpegpicture.c:287
int ff_update_picture_tables(Picture *dst, Picture *src)
Definition: mpegpicture.c:309

Referenced by ff_mpeg_update_thread_context().

#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)
#define NULL
Definition: coverity.c:32
#define MAX_PICTURE_COUNT
Definition: mpegpicture.h:32

Referenced by ff_mpeg_update_thread_context().

#define COLOR (   theta,
  r 
)
Value:
u = (int)(128 + r * cos(theta * 3.141592 / 180)); \
v = (int)(128 + r * sin(theta * 3.141592 / 180));
float v
const char * r
Definition: vf_curves.c:107
float u

Referenced by ff_print_debug_info2().

Function Documentation

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().

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().

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().

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

Definition at line 138 of file mpegvideo.c.

Referenced by dct_init().

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

Definition at line 169 of file mpegvideo.c.

Referenced by dct_init().

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

Definition at line 200 of file mpegvideo.c.

Referenced by dct_init().

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

Definition at line 234 of file mpegvideo.c.

Referenced by dct_init().

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

Definition at line 261 of file mpegvideo.c.

Referenced by dct_init().

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

Definition at line 267 of file mpegvideo.c.

Referenced by dct_init().

static av_cold int dct_init ( MpegEncContext s)
static

Definition at line 274 of file mpegvideo.c.

Referenced by ff_mpv_common_init().

av_cold void ff_mpv_idct_init ( MpegEncContext s)
static int alloc_picture ( MpegEncContext s,
Picture pic,
int  shared 
)
static

Definition at line 339 of file mpegvideo.c.

Referenced by ff_mpv_frame_start().

static int init_duplicate_context ( MpegEncContext s)
static

Definition at line 347 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), and ff_mpv_common_init().

static void free_duplicate_context ( MpegEncContext s)
static

Definition at line 399 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

static void backup_duplicate_context ( MpegEncContext bak,
MpegEncContext src 
)
static

Definition at line 419 of file mpegvideo.c.

Referenced by ff_update_duplicate_context().

int ff_update_duplicate_context ( MpegEncContext dst,
MpegEncContext src 
)

Definition at line 446 of file mpegvideo.c.

Referenced by decode_chunks(), and encode_picture().

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).

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

Definition at line 625 of file mpegvideo.c.

Referenced by ff_mpv_decode_defaults(), and mpv_encode_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 648 of file mpegvideo.c.

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

void ff_mpv_decode_init ( MpegEncContext s,
AVCodecContext avctx 
)
static int init_context_frame ( MpegEncContext s)
static

Initialize and allocates MpegEncContext fields dependent on the resolution.

Definition at line 668 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), and 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 792 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(), rv10_decode_init(), rv20_decode_picture_header(), svq1_encode_init(), and vcr2_init_sequence().

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 904 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

int ff_mpv_common_frame_size_change ( MpegEncContext s)
void ff_mpv_common_end ( MpegEncContext s)
static void gray_frame ( AVFrame frame)
static

Definition at line 1083 of file mpegvideo.c.

Referenced by 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 1103 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().

void ff_mpv_frame_end ( MpegEncContext s)
static int clip_line ( int *  sx,
int *  sy,
int *  ex,
int *  ey,
int  maxx 
)
static

Definition at line 1344 of file mpegvideo.c.

Referenced by draw_line().

static void draw_line ( uint8_t buf,
int  sx,
int  sy,
int  ex,
int  ey,
int  w,
int  h,
int  stride,
int  color 
)
static

Draw a line from (ex, ey) -> (sx, sy).

Parameters
wwidth of the image
hheight of the image
stridestride/linesize of the image
colorcolor of the arrow

Definition at line 1373 of file mpegvideo.c.

Referenced by draw_arrow().

static void draw_arrow ( uint8_t buf,
int  sx,
int  sy,
int  ex,
int  ey,
int  w,
int  h,
int  stride,
int  color,
int  tail,
int  direction 
)
static

Draw an arrow from (ex, ey) -> (sx, sy).

Parameters
wwidth of the image
hheight of the image
stridestride/linesize of the image
colorcolor of the arrow

Definition at line 1431 of file mpegvideo.c.

Referenced by ff_print_debug_info2().

static int add_mb ( AVMotionVector mb,
uint32_t  mb_type,
int  dst_x,
int  dst_y,
int  src_x,
int  src_y,
int  direction 
)
static

Definition at line 1470 of file mpegvideo.c.

Referenced by ff_print_debug_info2().

void ff_print_debug_info2 ( AVCodecContext avctx,
AVFrame pict,
uint8_t mbskip_table,
uint32_t *  mbtype_table,
int8_t *  qscale_table,
int16_t(*[2])  motion_val[2],
int *  low_delay,
int  mb_width,
int  mb_height,
int  mb_stride,
int  quarter_sample 
)

Print debugging info for the given picture.

Definition at line 1489 of file mpegvideo.c.

Referenced by ff_print_debug_info(), and h264_decode_frame().

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 
)

Definition at line 1873 of file mpegvideo.c.

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

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 1885 of file mpegvideo.c.

Referenced by MPV_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 1932 of file mpegvideo.c.

Referenced by MPV_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 2069 of file mpegvideo.c.

Referenced by 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 2137 of file mpegvideo.c.

Referenced by mpv_decode_mb_internal().

static int lowest_referenced_row ( MpegEncContext s,
int  dir 
)
static

find the lowest MB row referenced in the MVs

Definition at line 2271 of file mpegvideo.c.

Referenced by mpv_decode_mb_internal().

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

Definition at line 2307 of file mpegvideo.c.

Referenced by mpv_decode_mb_internal().

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

Definition at line 2315 of file mpegvideo.c.

Referenced by mpv_decode_mb_internal().

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

Definition at line 2323 of file mpegvideo.c.

Referenced by mpv_decode_mb_internal().

void ff_clean_intra_table_entries ( MpegEncContext s)

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

Definition at line 2336 of file mpegvideo.c.

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

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

Definition at line 2377 of file mpegvideo.c.

Referenced by ff_mpv_decode_mb().

void ff_mpv_decode_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)

Definition at line 2676 of file mpegvideo.c.

Referenced by decode_wmv9(), and flush().

void ff_set_qscale ( MpegEncContext s,
int  qscale 
)
void ff_mpv_report_decode_progress ( MpegEncContext s)

Definition at line 2721 of file mpegvideo.c.

Referenced by decode_slice(), and mpeg_decode_slice().