mpegvideo.c File Reference

The simplest mpeg encoder (well, it was the simplest!). More...

#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "dsputil.h"
#include "internal.h"
#include "mathops.h"
#include "mpegvideo.h"
#include "mjpegenc.h"
#include "msmpeg4.h"
#include "xvmc_internal.h"
#include "thread.h"
#include <limits.h>

Go to the source code of this file.

Macros

#define COPY(a)   bak->a = src->a
 
#define COLOR(theta, r)
 

Functions

static void dct_unquantize_mpeg1_intra_c (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
static void dct_unquantize_mpeg1_inter_c (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
static void dct_unquantize_mpeg2_intra_c (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
static void dct_unquantize_mpeg2_intra_bitexact (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
static void dct_unquantize_mpeg2_inter_c (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
static void dct_unquantize_h263_intra_c (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
static void dct_unquantize_h263_inter_c (MpegEncContext *s, DCTELEM *block, int n, int qscale)
 
const uint8_tavpriv_mpv_find_start_code (const uint8_t *restrict p, const uint8_t *end, uint32_t *restrict state)
 
av_cold int ff_dct_common_init (MpegEncContext *s)
 
void ff_copy_picture (Picture *dst, Picture *src)
 
static void free_frame_buffer (MpegEncContext *s, Picture *pic)
 Release a frame buffer. More...
 
int ff_mpv_frame_size_alloc (MpegEncContext *s, int linesize)
 
static int alloc_frame_buffer (MpegEncContext *s, Picture *pic)
 Allocate a frame buffer. More...
 
int ff_alloc_picture (MpegEncContext *s, Picture *pic, int shared)
 Allocate a Picture. More...
 
static void free_picture (MpegEncContext *s, Picture *pic)
 Deallocate a picture. More...
 
static int init_duplicate_context (MpegEncContext *s, MpegEncContext *base)
 
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 int 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)
 
void ff_init_rl (RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
 
void ff_init_vlc_rl (RLTable *rl)
 
void ff_release_unused_pictures (MpegEncContext *s, int remove_current)
 
static int pic_is_unused (MpegEncContext *s, Picture *pic)
 
static int find_unused_picture (MpegEncContext *s, int shared)
 
int ff_find_unused_picture (MpegEncContext *s, int shared)
 
static void update_noise_reduction (MpegEncContext *s)
 
int ff_MPV_frame_start (MpegEncContext *s, AVCodecContext *avctx)
 generic function for encode/decode called after coding/decoding the header and before a frame is coded/decoded. More...
 
void ff_MPV_frame_end (MpegEncContext *s)
 
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)
 Draw an arrow from (ex, ey) -> (sx, sy). More...
 
void ff_print_debug_info (MpegEncContext *s, AVFrame *pict)
 Print debugging info for the given picture. More...
 
int ff_MPV_lowest_referenced_row (MpegEncContext *s, int dir)
 find the lowest MB row referenced in the MVs More...
 
static void put_dct (MpegEncContext *s, DCTELEM *block, int i, uint8_t *dest, int line_size, int qscale)
 
static void add_dct (MpegEncContext *s, DCTELEM *block, int i, uint8_t *dest, int line_size)
 
static void add_dequant_dct (MpegEncContext *s, DCTELEM *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, DCTELEM block[12][64], int is_mpeg12)
 
void ff_MPV_decode_mb (MpegEncContext *s, DCTELEM block[12][64])
 
void ff_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)
 

Variables

static const uint8_t ff_default_chroma_qscale_table [32]
 
const uint8_t ff_mpeg1_dc_scale_table [128]
 
static const uint8_t mpeg2_dc_scale_table1 [128]
 
static const uint8_t mpeg2_dc_scale_table2 [128]
 
static const uint8_t mpeg2_dc_scale_table3 [128]
 
const uint8_t *const ff_mpeg2_dc_scale_table [4]
 
enum AVPixelFormat ff_pixfmt_list_420 []
 
enum AVPixelFormat ff_hwaccel_pixfmt_list_420 []
 

Detailed Description

The simplest mpeg encoder (well, it was the simplest!).

Definition in file mpegvideo.c.

Macro Definition Documentation

#define COLOR (   theta,
  r 
)
Value:
u = (int)(128 + r * cos(theta * 3.141592 / 180)); \
v = (int)(128 + r * sin(theta * 3.141592 / 180));

Referenced by avfilter_register_all(), and ff_print_debug_info().

#define COPY (   a)    bak->a = src->a

Function Documentation

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

Definition at line 2076 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

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

Definition at line 2084 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

static int alloc_frame_buffer ( MpegEncContext s,
Picture pic 
)
static

Allocate a frame buffer.

Definition at line 267 of file mpegvideo.c.

Referenced by ff_alloc_picture().

static void backup_duplicate_context ( MpegEncContext bak,
MpegEncContext src 
)
static

Definition at line 514 of file mpegvideo.c.

Referenced by ff_update_duplicate_context().

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

Definition at line 2699 of file mpegvideo.c.

Referenced by ff_dct_common_init().

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

Definition at line 2662 of file mpegvideo.c.

Referenced by ff_dct_common_init().

static void dct_unquantize_mpeg1_inter_c ( MpegEncContext s,
DCTELEM block,
int  n,
int  qscale 
)
static

Definition at line 2539 of file mpegvideo.c.

Referenced by ff_dct_common_init().

static void dct_unquantize_mpeg1_intra_c ( MpegEncContext s,
DCTELEM block,
int  n,
int  qscale 
)
static

Definition at line 2507 of file mpegvideo.c.

Referenced by ff_dct_common_init().

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

Definition at line 2631 of file mpegvideo.c.

Referenced by ff_dct_common_init().

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

Definition at line 2598 of file mpegvideo.c.

Referenced by ff_dct_common_init().

static void dct_unquantize_mpeg2_intra_c ( MpegEncContext s,
DCTELEM block,
int  n,
int  qscale 
)
static

Definition at line 2568 of file mpegvideo.c.

Referenced by ff_dct_common_init().

static void draw_arrow ( uint8_t buf,
int  sx,
int  sy,
int  ex,
int  ey,
int  w,
int  h,
int  stride,
int  color 
)
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 1694 of file mpegvideo.c.

Referenced by ff_print_debug_info().

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 1641 of file mpegvideo.c.

Referenced by draw_arrow().

int ff_alloc_picture ( MpegEncContext s,
Picture pic,
int  shared 
)

Allocate a Picture.

The pixels are allocated/set by calling get_buffer() if shared = 0

Definition at line 326 of file mpegvideo.c.

Referenced by ff_MPV_frame_start(), load_input_picture(), and select_input_picture().

void ff_clean_intra_table_entries ( MpegEncContext s)

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

Definition at line 2097 of file mpegvideo.c.

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

void ff_copy_picture ( Picture dst,
Picture src 
)

Definition at line 217 of file mpegvideo.c.

Referenced by decode_slice_header(), ff_MPV_frame_start(), and select_input_picture().

av_cold int ff_dct_common_init ( MpegEncContext s)

Definition at line 175 of file mpegvideo.c.

Referenced by dnxhd_encode_init(), ff_h263_decode_frame(), and ff_MPV_common_init().

int ff_find_unused_picture ( MpegEncContext s,
int  shared 
)
void ff_init_rl ( RLTable rl,
uint8_t  static_store[2][2 *MAX_RUN+MAX_LEVEL+3] 
)
Parameters
static_storestatic uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3] which will hold the level and run tables, if this is NULL av_malloc() will be used

Definition at line 1185 of file mpegvideo.c.

Referenced by decode_init(), encode_init(), ff_h261_encode_init(), ff_h263_decode_init_vlc(), ff_h263_encode_init(), ff_mpeg12_init_vlcs(), ff_mpeg1_encode_init(), ff_msmpeg4_decode_init(), ff_msmpeg4_encode_init(), and h261_decode_init_vlc().

void ff_init_vlc_rl ( RLTable rl)

Definition at line 1237 of file mpegvideo.c.

void ff_mpeg_flush ( AVCodecContext avctx)

Definition at line 2480 of file mpegvideo.c.

Referenced by decode_wmv9(), flush(), and flush_dpb().

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 683 of file mpegvideo.c.

Referenced by ff_MPV_decode_defaults(), and MPV_encode_defaults().

av_cold int ff_MPV_common_init ( MpegEncContext s)
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 712 of file mpegvideo.c.

Referenced by ff_h263_decode_init(), ff_h264_decode_init(), ff_rv34_decode_init(), h261_decode_init(), mpeg_decode_init(), and rv10_decode_init().

int ff_mpv_frame_size_alloc ( MpegEncContext s,
int  linesize 
)
int ff_MPV_frame_start ( MpegEncContext s,
AVCodecContext avctx 
)

generic function for encode/decode called after coding/decoding the header and before a frame is coded/decoded.

Definition at line 1364 of file mpegvideo.c.

Referenced by decode_wmv9(), ff_h263_decode_frame(), ff_h264_frame_start(), ff_MPV_encode_picture(), ff_rv34_decode_frame(), h261_decode_frame(), mpeg_field_start(), rv10_decode_packet(), and vc1_decode_frame().

int ff_MPV_lowest_referenced_row ( MpegEncContext s,
int  dir 
)

find the lowest MB row referenced in the MVs

Definition at line 2032 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

void ff_MPV_report_decode_progress ( MpegEncContext s)

Definition at line 2742 of file mpegvideo.c.

Referenced by decode_slice(), and mpeg_decode_slice().

void ff_print_debug_info ( MpegEncContext s,
AVFrame pict 
)

Print debugging info for the given picture.

Definition at line 1725 of file mpegvideo.c.

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

void ff_release_unused_pictures ( MpegEncContext s,
int  remove_current 
)

Definition at line 1277 of file mpegvideo.c.

Referenced by decode_slice_header(), and ff_MPV_frame_start().

int ff_update_duplicate_context ( MpegEncContext dst,
MpegEncContext src 
)

Definition at line 541 of file mpegvideo.c.

Referenced by decode_chunks(), and encode_picture().

static int find_unused_picture ( MpegEncContext s,
int  shared 
)
static

Definition at line 1302 of file mpegvideo.c.

Referenced by ff_find_unused_picture().

static int 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 1010 of file mpegvideo.c.

Referenced by ff_MPV_common_end(), and ff_MPV_common_frame_size_change().

static void free_duplicate_context ( MpegEncContext s)
static

Definition at line 494 of file mpegvideo.c.

Referenced by ff_MPV_common_end(), and ff_MPV_common_frame_size_change().

static void free_frame_buffer ( MpegEncContext s,
Picture pic 
)
static
static void free_picture ( MpegEncContext s,
Picture pic 
)
static

Deallocate a picture.

Definition at line 415 of file mpegvideo.c.

Referenced by ff_find_unused_picture(), and ff_MPV_common_end().

static int init_context_frame ( MpegEncContext s)
static

Initialize and allocates MpegEncContext fields dependent on the resolution.

Definition at line 720 of file mpegvideo.c.

Referenced by ff_MPV_common_frame_size_change(), and ff_MPV_common_init().

static int init_duplicate_context ( MpegEncContext s,
MpegEncContext base 
)
static

Definition at line 449 of file mpegvideo.c.

Referenced by ff_MPV_common_frame_size_change(), and ff_MPV_common_init().

static av_always_inline void MPV_decode_mb_internal ( MpegEncContext s,
DCTELEM  block[12][64],
int  is_mpeg12 
)
static

Definition at line 2138 of file mpegvideo.c.

Referenced by ff_MPV_decode_mb().

static int pic_is_unused ( MpegEncContext s,
Picture pic 
)
inlinestatic

Definition at line 1292 of file mpegvideo.c.

Referenced by find_unused_picture().

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

Definition at line 2068 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

static void update_noise_reduction ( MpegEncContext s)
static

Definition at line 1339 of file mpegvideo.c.

Referenced by ff_MPV_frame_start().

Variable Documentation

const uint8_t ff_default_chroma_qscale_table[32]
static
Initial value:
= {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
}

Definition at line 67 of file mpegvideo.c.

Referenced by ff_MPV_common_defaults().

enum AVPixelFormat ff_hwaccel_pixfmt_list_420[]
const uint8_t ff_mpeg1_dc_scale_table[128]
Initial value:
= {
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
}

Definition at line 73 of file mpegvideo.c.

Referenced by ff_flv_decode_picture_header(), ff_flv_encode_picture_header(), ff_h261_encode_init(), ff_h263_decode_picture_header(), ff_h263_encode_init(), ff_h263_encode_picture_header(), ff_intel_h263_decode_picture_header(), ff_MPV_common_defaults(), ff_msmpeg4_common_init(), ff_rv20_encode_picture_header(), and rv10_decode_packet().

const uint8_t* const ff_mpeg2_dc_scale_table[4]
enum AVPixelFormat ff_pixfmt_list_420[]
Initial value:

Definition at line 128 of file mpegvideo.c.

const uint8_t mpeg2_dc_scale_table1[128]
static
Initial value:
= {
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
}

Definition at line 85 of file mpegvideo.c.

const uint8_t mpeg2_dc_scale_table2[128]
static
Initial value:
= {
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
}

Definition at line 97 of file mpegvideo.c.

const uint8_t mpeg2_dc_scale_table3[128]
static
Initial value:
= {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
}

Definition at line 109 of file mpegvideo.c.