mpegvideo.c File Reference

Detailed Description

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

Definition in file mpegvideo.c.

Go to the source code of this file.

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)
static void draw_edges_c (uint8_t *buf, int wrap, int width, int height, int w)
int XVMC_field_start (MpegEncContext *s, AVCodecContext *avctx)
void XVMC_field_end (MpegEncContext *s)
void XVMC_decode_mb (MpegEncContext *s)
void ff_init_scantable (uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
const uint8_t * ff_find_start_code (const uint8_t *restrict p, const uint8_t *end, uint32_t *restrict state)
 DTVRecorder -- base class for Digital Televison recorders Copyright 2003-2004 by Brandon Beattie, Doug Larrick, Jason Hoos, and Daniel Thor Kristjansson Distributed as part of MythTV under GPL v2 and later.
int ff_dct_common_init (MpegEncContext *s)
void copy_picture (Picture *dst, Picture *src)
int alloc_picture (MpegEncContext *s, Picture *pic, int shared)
 allocates a Picture The pixels are allocated/set by calling get_buffer() if shared=0
static void free_picture (MpegEncContext *s, Picture *pic)
 deallocates a picture
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)
void ff_update_duplicate_context (MpegEncContext *dst, MpegEncContext *src)
void MPV_common_defaults (MpegEncContext *s)
 sets the given MpegEncContext to common defaults (same for encoding and decoding).
void MPV_decode_defaults (MpegEncContext *s)
 sets the given MpegEncContext to defaults for decoding.
int MPV_common_init (MpegEncContext *s)
 init common structure for both encoder and decoder.
void MPV_common_end (MpegEncContext *s)
void init_rl (RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
void init_vlc_rl (RLTable *rl, int use_static)
int ff_find_unused_picture (MpegEncContext *s, int shared)
static void update_noise_reduction (MpegEncContext *s)
int 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
void 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)
 draws an line from (ex, ey) -> (sx, sy).
static void draw_arrow (uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color)
 draws an arrow from (ex, ey) -> (sx, sy).
void ff_print_debug_info (MpegEncContext *s, AVFrame *pict)
 prints debuging info for the given picture.
void ff_emulated_edge_mc (uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h, int src_x, int src_y, int w, int h)
 Copies a rectangular area of samples to a temporary buffer and replicates the boarder samples.
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, int 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)
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
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)
 cleans dc, ac, coded_block for the current non intra MB
static av_always_inline void MPV_decode_mb_internal (MpegEncContext *s, DCTELEM block[12][64], int lowres_flag)
void 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.

Variables

void(* draw_edges )(uint8_t *buf, int wrap, int width, int height, int w) = draw_edges_c
static const uint8_t ff_default_chroma_qscale_table [32]

Function Documentation

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

Definition at line 2213 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 2245 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 2274 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 2304 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 2337 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 2368 of file mpegvideo.c.

Referenced by ff_dct_common_init().

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

Definition at line 2405 of file mpegvideo.c.

Referenced by ff_dct_common_init().

static void draw_edges_c ( uint8_t *  buf,
int  wrap,
int  width,
int  height,
int  w 
) [static]

Definition at line 804 of file mpegvideo.c.

int XVMC_field_start ( MpegEncContext *  s,
AVCodecContext *  avctx 
)

Definition at line 98 of file xvmcvideo.c.

void XVMC_field_end ( MpegEncContext *  s  ) 

Definition at line 151 of file xvmcvideo.c.

void XVMC_decode_mb ( MpegEncContext *  s  ) 

Definition at line 157 of file xvmcvideo.c.

Referenced by MPV_decode_mb_internal().

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

Definition at line 78 of file mpegvideo.c.

Referenced by common_init(), decode_init(), decode_pic(), decode_vop_header(), dnxhd_init_vlc(), ff_dct_common_init(), ff_intrax8_common_init(), ff_mjpeg_decode_init(), mpeg_decode_picture_coding_extension(), vp3_decode_init(), vp56_init(), and wmv2_common_init().

const uint8_t* ff_find_start_code ( const uint8_t *restrict  p,
const uint8_t *  end,
uint32_t *restrict  state 
)

DTVRecorder -- base class for Digital Televison recorders Copyright 2003-2004 by Brandon Beattie, Doug Larrick, Jason Hoos, and Daniel Thor Kristjansson Distributed as part of MythTV under GPL v2 and later.

Definition at line 102 of file mpegvideo.c.

Referenced by H264::KeyframeSequencer::AddBytes(), cavs_decode_frame(), ff_mpeg1_find_frame_end(), ff_rtp_send_mpegvideo(), DTVRecorder::FindMPEG2Keyframes(), mpeg_decode_frame(), AvFormatDecoder::MpegPreProcessPkt(), mpegvideo_extract_headers(), and slice_decode_thread().

int ff_dct_common_init ( MpegEncContext *  s  ) 

Definition at line 133 of file mpegvideo.c.

Referenced by dnxhd_encode_init(), and MPV_common_init().

void copy_picture ( Picture *  dst,
Picture *  src 
)

Definition at line 176 of file mpegvideo.c.

Referenced by select_input_picture().

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

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

Definition at line 185 of file mpegvideo.c.

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

static void free_picture ( MpegEncContext *  s,
Picture *  pic 
) [static]

deallocates a picture

Definition at line 277 of file mpegvideo.c.

Referenced by MPV_common_end().

static int init_duplicate_context ( MpegEncContext *  s,
MpegEncContext *  base 
) [static]

Definition at line 307 of file mpegvideo.c.

Referenced by MPV_common_init().

static void free_duplicate_context ( MpegEncContext *  s  )  [static]

Definition at line 337 of file mpegvideo.c.

Referenced by MPV_common_end().

static void backup_duplicate_context ( MpegEncContext *  bak,
MpegEncContext *  src 
) [static]

Definition at line 353 of file mpegvideo.c.

Referenced by ff_update_duplicate_context().

void ff_update_duplicate_context ( MpegEncContext *  dst,
MpegEncContext *  src 
)

Definition at line 375 of file mpegvideo.c.

Referenced by encode_picture(), and mpeg_decode_frame().

void MPV_common_defaults ( MpegEncContext *  s  ) 

sets 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 393 of file mpegvideo.c.

Referenced by MPV_decode_defaults(), and MPV_encode_defaults().

void MPV_decode_defaults ( MpegEncContext *  s  ) 

sets the given MpegEncContext to defaults for decoding.

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

Definition at line 415 of file mpegvideo.c.

Referenced by decode_init(), ff_cavs_init(), ff_h263_decode_init(), h261_decode_init(), mpeg_decode_init(), rv10_decode_init(), and svq1_decode_init().

int 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 423 of file mpegvideo.c.

Referenced by decode_pic(), decode_slice_header(), ff_h263_decode_frame(), ff_h263_decode_init(), h261_decode_frame(), MPV_encode_init(), rv10_decode_init(), rv20_decode_picture_header(), svq1_decode_init(), svq3_decode_frame(), and vcr2_init_sequence().

void MPV_common_end ( MpegEncContext *  s  ) 

Definition at line 615 of file mpegvideo.c.

Referenced by decode_end(), decode_slice_header(), ff_h263_decode_end(), ff_h263_decode_frame(), h261_decode_end(), h261_decode_frame(), mpeg_decode_end(), mpeg_decode_postinit(), MPV_common_init(), MPV_encode_end(), rv10_decode_end(), rv20_decode_picture_header(), svq1_decode_end(), vc1_decode_end(), and vcr2_init_sequence().

void init_rl ( RLTable *  rl,
uint8_t  static_store[2][2 *MAX_RUN+MAX_LEVEL+3] 
)

Parameters:
static_store static 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 698 of file mpegvideo.c.

Referenced by ff_h261_encode_init(), ff_mpeg1_encode_init(), ff_msmpeg4_decode_init(), ff_msmpeg4_encode_init(), h261_decode_init_vlc(), h263_decode_init_vlc(), h263_encode_init(), and init_vlcs().

void init_vlc_rl ( RLTable *  rl,
int  use_static 
)

Definition at line 749 of file mpegvideo.c.

Referenced by ff_msmpeg4_decode_init(), h261_decode_init_vlc(), and h263_decode_init_vlc().

int ff_find_unused_picture ( MpegEncContext *  s,
int  shared 
)

Definition at line 831 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), h261_decode_frame(), load_input_picture(), MPV_frame_start(), select_input_picture(), and vc1_decode_frame().

static void update_noise_reduction ( MpegEncContext *  s  )  [static]

Definition at line 863 of file mpegvideo.c.

int 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 883 of file mpegvideo.c.

Referenced by ff_h263_decode_frame(), frame_start(), h261_decode_frame(), mpeg_field_start(), MPV_encode_picture(), rv10_decode_packet(), svq1_decode_frame(), and vc1_decode_frame().

void MPV_frame_end ( MpegEncContext *  s  ) 

Definition at line 1024 of file mpegvideo.c.

Referenced by decode_frame(), ff_h263_decode_frame(), h261_decode_frame(), MPV_encode_picture(), rv10_decode_frame(), rv10_decode_packet(), slice_end(), svq1_decode_frame(), svq3_decode_frame(), and vc1_decode_frame().

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

draws an line from (ex, ey) -> (sx, sy).

Parameters:
w width of the image
h height of the image
stride stride/linesize of the image
color color of the arrow

Definition at line 1081 of file mpegvideo.c.

Referenced by draw_arrow(), goom_lines_draw(), and grid3d_draw().

static void draw_arrow ( uint8_t *  buf,
int  sx,
int  sy,
int  ex,
int  ey,
int  w,
int  h,
int  stride,
int  color 
) [static]

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

Parameters:
w width of the image
h height of the image
stride stride/linesize of the image
color color of the arrow

Definition at line 1130 of file mpegvideo.c.

Referenced by ff_print_debug_info().

void ff_print_debug_info ( MpegEncContext *  s,
AVFrame *  pict 
)

prints debuging info for the given picture.

Definition at line 1159 of file mpegvideo.c.

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

void ff_emulated_edge_mc ( uint8_t *  buf,
uint8_t *  src,
int  linesize,
int  block_w,
int  block_h,
int  src_x,
int  src_y,
int  w,
int  h 
)

Copies a rectangular area of samples to a temporary buffer and replicates the boarder samples.

Parameters:
buf destination buffer
src source buffer
linesize number of bytes between 2 vertically adjacent samples in both the source and destination buffers
block_w width of block
block_h height of block
src_x x coordinate of the top left sample of the block in the source buffer
src_y y coordinate of the top left sample of the block in the source buffer
w width of the source buffer
h height of the source buffer

Definition at line 1429 of file mpegvideo.c.

Referenced by chroma_4mv_motion(), chroma_4mv_motion_lowres(), encode_mb_internal(), ff_mspel_motion(), gmc1_motion(), gmc_mmx(), hpel_motion(), hpel_motion_lowres(), mc_dir_part(), mca(), mpeg_motion(), mpeg_motion_lowres(), MPV_motion(), qpel_motion(), render_slice(), svq3_mc_dir_part(), vc1_interp_mc(), vc1_mc_1mv(), vc1_mc_4mv_chroma(), vc1_mc_4mv_luma(), and vp56_mc().

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,
int  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 
) [inline, static]

Definition at line 1488 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 
) [static]

Definition at line 1531 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 
) [inline, static]

Definition at line 1627 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 
) [inline, static]

motion compensation of a single macroblock

Parameters:
s context
dest_y luma destination pointer
dest_cb chroma cb/u destination pointer
dest_cr chroma cr/v destination pointer
dir direction (0->forward, 1->backward)
ref_picture array[3] of pointers to the 3 planes of the reference picture
pic_op halfpel 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 1688 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

static void put_dct ( MpegEncContext *  s,
DCTELEM *  block,
int  i,
uint8_t *  dest,
int  line_size,
int  qscale 
) [inline, static]

Definition at line 1804 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

static void add_dct ( MpegEncContext *  s,
DCTELEM *  block,
int  i,
uint8_t *  dest,
int  line_size 
) [inline, static]

Definition at line 1812 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 
) [inline, static]

Definition at line 1820 of file mpegvideo.c.

Referenced by MPV_decode_mb_internal().

void ff_clean_intra_table_entries ( MpegEncContext *  s  ) 

cleans dc, ac, coded_block for the current non intra MB

Definition at line 1833 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,
DCTELEM  block[12][64],
int  lowres_flag 
) [static]

Definition at line 1873 of file mpegvideo.c.

Referenced by MPV_decode_mb().

void MPV_decode_mb ( MpegEncContext *  s,
DCTELEM  block[12][64] 
)

Definition at line 2114 of file mpegvideo.c.

Referenced by decode_mb(), decode_slice(), encode_mb_hq(), encode_thread(), h261_decode_mb(), h261_decode_mb_skipped(), mpeg_decode_slice(), and rv10_decode_packet().

void ff_draw_horiz_band ( MpegEncContext *  s,
int  y,
int  h 
)

Parameters:
h is the normal height, this will be reduced automatically if needed for the last row

Definition at line 2123 of file mpegvideo.c.

Referenced by decode_slice(), ff_intrax8_decode_picture(), mpeg_decode_slice(), svq3_decode_frame(), vc1_decode_b_blocks(), vc1_decode_i_blocks(), vc1_decode_i_blocks_adv(), vc1_decode_p_blocks(), vc1_decode_skip_blocks(), XVMC_decode_mb(), XVMC_field_end(), and XVMC_VLD_decode_slice().

void ff_init_block_index ( MpegEncContext *  s  ) 

Definition at line 2162 of file mpegvideo.c.

Referenced by decode_slice(), encode_thread(), estimate_motion_thread(), ff_h261_reorder_mb_index(), h261_decode_mb(), h261_decode_mb_skipped(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg_decode_slice(), rv10_decode_packet(), svq1_encode_plane(), vc1_decode_b_blocks(), vc1_decode_i_blocks(), vc1_decode_i_blocks_adv(), vc1_decode_p_blocks(), and vc1_decode_skip_blocks().

void ff_mpeg_flush ( AVCodecContext *  avctx  ) 

Definition at line 2187 of file mpegvideo.c.

Referenced by flush_dpb().

void ff_set_qscale ( MpegEncContext *  s,
int  qscale 
)

set qscale and update qscale dependent variables.

Definition at line 2434 of file mpegvideo.c.

Referenced by decode_slice(), encode_mb_internal(), encode_thread(), ff_h261_encode_mb(), ff_mpeg4_decode_mb(), h261_decode_gob(), h261_decode_mb(), h263_decode_dquant(), mpeg4_decode_partition_a(), mpeg4_decode_partition_b(), mpeg4_decode_partitioned_mb(), and rv10_decode_packet().

Variable Documentation

void(* draw_edges)(uint8_t *buf, int wrap, int width, int height, int w) = draw_edges_c

Referenced by frame_start(), MPV_common_init_mmx(), and MPV_frame_end().

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 73 of file mpegvideo.c.

Referenced by MPV_common_defaults().

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