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 "idctdsp.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"

Go to the source code of this file.

Macros

#define COPY(a)   bak->a = src->a
 

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_init_scantable (const uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
 
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, const 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)
 
void ff_clean_intra_table_entries (MpegEncContext *s)
 Clean dc, ac, coded_block for the current non-intra MB. More...
 
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

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 44 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 73 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 102 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 132 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 166 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 200 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 234 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 261 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 267 of file mpegvideo.c.

Referenced by dct_init().

◆ 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(), and main().

◆ ff_init_scantable()

av_cold void ff_init_scantable ( const uint8_t *  permutation,
ScanTable st,
const uint8_t *  src_scantable 
)

◆ 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 364 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 410 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 434 of file mpegvideo.c.

Referenced by free_duplicate_contexts().

◆ free_duplicate_contexts()

static void free_duplicate_contexts ( MpegEncContext s)
static

Definition at line 454 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 463 of file mpegvideo.c.

Referenced by ff_update_duplicate_context().

◆ ff_update_duplicate_context()

int ff_update_duplicate_context ( MpegEncContext dst,
const MpegEncContext src 
)

Definition at line 490 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 521 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 539 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 630 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 682 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_vc1_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 764 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)

◆ 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 827 of file mpegvideo.c.

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

◆ ff_init_block_index()

void ff_init_block_index ( MpegEncContext s)

◆ ff_set_qscale()

void ff_set_qscale ( MpegEncContext s,
int  qscale 
)