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/mem.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"
#include "mpegvideo_unquantize.h"
#include "libavutil/refstruct.h"

Go to the source code of this file.

Macros

#define COPY(M)
 
#define BACKUP(T, member)   T member = dst->member;
 
#define RESTORE(T, member)   dst->member = member;
 
#define ALLOC_POOL(name, size, flags)
 

Functions

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 void dsp_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 av_cold int init_duplicate_context (MpegEncContext *s)
 
av_cold int ff_mpv_init_duplicate_contexts (MpegEncContext *s)
 Initialize an MpegEncContext's thread contexts. More...
 
static av_cold void free_duplicate_context (MpegEncContext *s)
 
static av_cold void free_duplicate_contexts (MpegEncContext *s)
 
int ff_update_duplicate_context (MpegEncContext *dst, const MpegEncContext *src)
 
av_cold void ff_mpv_common_defaults (MpegEncContext *s)
 Set the given MpegEncContext to common defaults (same for encoding and decoding). More...
 
static av_cold void free_buffer_pools (BufferPoolContext *pools)
 
av_cold int ff_mpv_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...
 
av_cold 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...
 
av_cold void ff_mpv_common_end (MpegEncContext *s)
 
void ff_clean_intra_table_entries (MpegEncContext *s)
 Clean dc, ac 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 (   M)
Value:
M(ScratchpadContext, sc) \
M(void*, blocks) \
M(void*, block) \
M(int, start_mb_y) \
M(int, end_mb_y) \
M(int16_t*, dc_val) \
M(void*, ac_val)

◆ BACKUP

#define BACKUP (   T,
  member 
)    T member = dst->member;

◆ RESTORE

#define RESTORE (   T,
  member 
)    dst->member = member;

◆ ALLOC_POOL

#define ALLOC_POOL (   name,
  size,
  flags 
)
Value:
do { \
pools->name ##_pool = av_refstruct_pool_alloc((size), (flags)); \
if (!pools->name ##_pool) \
return AVERROR(ENOMEM); \
} while (0)

Function Documentation

◆ gray16()

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

Definition at line 48 of file mpegvideo.c.

Referenced by dsp_init().

◆ gray8()

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

Definition at line 54 of file mpegvideo.c.

Referenced by dsp_init().

◆ dsp_init()

static av_cold void dsp_init ( MpegEncContext *  s)
static

Definition at line 61 of file mpegvideo.c.

Referenced by ff_mpv_common_init().

◆ ff_init_scantable()

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

Definition at line 81 of file mpegvideo.c.

Referenced by decode_studio_vop_header(), decode_vop_header(), ff_mpv_idct_init(), ff_msmpeg4_common_init(), and ff_wmv2_common_init().

◆ ff_mpv_idct_init()

av_cold void ff_mpv_idct_init ( MpegEncContext *  s)

Definition at line 95 of file mpegvideo.c.

Referenced by dnxhd_encode_init(), ff_h263_decode_frame(), ff_mpv_decode_init(), ff_mpv_encode_init(), and switch_to_xvid_idct().

◆ init_duplicate_context()

static av_cold int init_duplicate_context ( MpegEncContext *  s)
static

Definition at line 117 of file mpegvideo.c.

Referenced by ff_mpv_init_duplicate_contexts().

◆ ff_mpv_init_duplicate_contexts()

av_cold 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 126 of file mpegvideo.c.

Referenced by ff_mpv_common_frame_size_change(), ff_mpv_common_init(), and ff_mpv_encode_init().

◆ free_duplicate_context()

static av_cold void free_duplicate_context ( MpegEncContext *  s)
static

Definition at line 151 of file mpegvideo.c.

Referenced by free_duplicate_contexts().

◆ free_duplicate_contexts()

static av_cold void free_duplicate_contexts ( MpegEncContext *  s)
static

Definition at line 165 of file mpegvideo.c.

Referenced by ff_mpv_free_context_frame().

◆ ff_update_duplicate_context()

int ff_update_duplicate_context ( MpegEncContext *  dst,
const MpegEncContext *  src 
)

Definition at line 174 of file mpegvideo.c.

Referenced by decode_chunks(), and encode_picture().

◆ ff_mpv_common_defaults()

av_cold 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 208 of file mpegvideo.c.

Referenced by ff_mpv_decode_init(), and mpv_encode_defaults().

◆ free_buffer_pools()

static av_cold void free_buffer_pools ( BufferPoolContext *  pools)
static

Definition at line 220 of file mpegvideo.c.

Referenced by ff_mpv_free_context_frame().

◆ ff_mpv_init_context_frame()

av_cold int ff_mpv_init_context_frame ( MpegEncContext *  s)

Initialize and allocates MpegEncContext fields dependent on the resolution.

Definition at line 230 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 398 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), ff_h263_decode_init(), ff_mpv_encode_init(), ff_rv34_decode_init(), ff_vc1_decode_init(), h261_decode_frame(), mpeg_decode_postinit(), rv20_decode_picture_header(), and vcr2_init_sequence().

◆ ff_mpv_free_context_frame()

av_cold 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 441 of file mpegvideo.c.

Referenced by ff_mpv_common_end(), and ff_mpv_common_frame_size_change().

◆ ff_mpv_common_end()

av_cold void ff_mpv_common_end ( MpegEncContext *  s)

Definition at line 467 of file mpegvideo.c.

Referenced by ff_mpv_common_init(), ff_mpv_decode_close(), ff_mpv_encode_end(), h261_decode_frame(), mpeg_decode_postinit(), rv20_decode_picture_header(), vc1_decode_reset(), and vcr2_init_sequence().

◆ ff_clean_intra_table_entries()

void ff_clean_intra_table_entries ( MpegEncContext *  s)

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

Definition at line 486 of file mpegvideo.c.

Referenced by ff_h263_clean_intra_table_entries().

◆ ff_init_block_index()

void ff_init_block_index ( MpegEncContext *  s)

Definition at line 511 of file mpegvideo.c.

Referenced by decode_slice(), encode_thread(), estimate_motion_thread(), ff_h261_reorder_mb_index(), h261_init_dest(), init_block_index(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg_decode_slice(), rv10_decode_packet(), and rv34_decode_slice().

◆ ff_set_qscale()

void ff_set_qscale ( MpegEncContext *  s,
int  qscale 
)

set qscale and update qscale dependent variables.

Definition at line 544 of file mpegvideo.c.

Referenced by decode_slice(), encode_mb_internal(), encode_thread(), h261_encode_mb(), h263_decode_dquant(), mpeg4_decode_mb(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg4_decode_partitioned_mb(), and rv10_decode_packet().

M
#define M(a, b)
Definition: vp3dsp.c:48
flags
const SwsFlags flags[]
Definition: swscale.c:61
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
ScratchpadContext
Definition: mpegpicture.h:34
size
int size
Definition: twinvq_data.h:10344
av_refstruct_pool_alloc
AVRefStructPool * av_refstruct_pool_alloc(size_t size, unsigned flags)
Equivalent to av_refstruct_pool_alloc(size, flags, NULL, NULL, NULL, NULL, NULL)
Definition: refstruct.c:335
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
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