Libav
Macros | Functions
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/timer.h"
#include "avcodec.h"
#include "blockdsp.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 "xvmc_internal.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 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...
 
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)
 
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)
 Print debugging info for the given picture. 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 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

◆ 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->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)
int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src)
Definition: mpegpicture.c:329
int ff_update_picture_tables(Picture *dst, Picture *src)
Definition: mpegpicture.c:287

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)
#define MAX_PICTURE_COUNT
Definition: mpegpicture.h:32
NULL
Definition: eval.c:55

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 52 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 84 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 113 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 143 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 207 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().

◆ dct_init()

static av_cold int dct_init ( MpegEncContext s)
static

Definition at line 271 of file mpegvideo.c.

Referenced by ff_mpv_common_init().

◆ ff_mpv_idct_init()

av_cold void ff_mpv_idct_init ( MpegEncContext s)

◆ alloc_picture()

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

Definition at line 318 of file mpegvideo.c.

Referenced by ff_mpv_frame_start().

◆ init_duplicate_context()

static int init_duplicate_context ( MpegEncContext s)
static

Definition at line 326 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 378 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 398 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 425 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 
)

◆ 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 592 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 615 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 623 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), and 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 763 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 878 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)

◆ 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 1052 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 
)

Print debugging info for the given picture.

Definition at line 1284 of file mpegvideo.c.

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

◆ 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 1384 of file mpegvideo.c.

Referenced by mpv_decode_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 1420 of file mpegvideo.c.

Referenced by mpv_decode_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 1428 of file mpegvideo.c.

Referenced by mpv_decode_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 1436 of file mpegvideo.c.

Referenced by mpv_decode_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 1449 of file mpegvideo.c.

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

◆ mpv_decode_mb_internal()

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

Definition at line 1490 of file mpegvideo.c.

Referenced by ff_mpv_decode_mb().

◆ ff_mpv_decode_mb()

void ff_mpv_decode_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 1776 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 1820 of file mpegvideo.c.

Referenced by decode_slice(), and mpeg_decode_slice().