FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
vp3.c File Reference

On2 VP3/VP4 Video Decoder. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/imgutils.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "get_bits.h"
#include "hpeldsp.h"
#include "internal.h"
#include "mathops.h"
#include "thread.h"
#include "videodsp.h"
#include "vp3data.h"
#include "vp4data.h"
#include "vp3dsp.h"
#include "xiph.h"

Go to the source code of this file.

Data Structures

struct  Vp3Fragment
 
struct  VP4Predictor
 
struct  HuffEntry
 
struct  HuffTable
 Used to store optimal huffman encoding results. More...
 
struct  Vp3DecodeContext
 

Macros

#define VP3_MV_VLC_BITS   6
 
#define VP4_MV_VLC_BITS   6
 
#define SUPERBLOCK_VLC_BITS   6
 
#define FRAGMENT_PIXELS   8
 
#define SB_NOT_CODED   0
 
#define SB_PARTIALLY_CODED   1
 
#define SB_FULLY_CODED   2
 
#define MAXIMUM_LONG_BIT_RUN   4129
 
#define MODE_INTER_NO_MV   0
 
#define MODE_INTRA   1
 
#define MODE_INTER_PLUS_MV   2
 
#define MODE_INTER_LAST_MV   3
 
#define MODE_INTER_PRIOR_LAST   4
 
#define MODE_USING_GOLDEN   5
 
#define MODE_GOLDEN_MV   6
 
#define MODE_INTER_FOURMV   7
 
#define CODING_MODE_COUNT   8
 
#define MODE_COPY   8
 
#define MIN_DEQUANT_VAL   2
 
#define TOKEN_EOB(eob_run)   ((eob_run) << 2)
 
#define TOKEN_ZERO_RUN(coeff, zero_run)   (((coeff) * 512) + ((zero_run) << 2) + 1)
 
#define TOKEN_COEFF(coeff)   (((coeff) * 4) + 2)
 
#define BLOCK_X   (2 * mb_x + (k & 1))
 
#define BLOCK_Y   (2 * mb_y + (k >> 1))
 
#define SET_CHROMA_MODES
 
#define COMPATIBLE_FRAME(x)   (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
 
#define DC_COEFF(u)   s->all_fragments[u].dc
 
#define PUL   8
 
#define PU   4
 
#define PUR   2
 
#define PL   1
 
#define TRANSPOSE(x)   (((x) >> 3) | (((x) & 7) << 3))
 

Enumerations

enum  {
  VP4_DC_INTRA = 0, VP4_DC_INTER = 1, VP4_DC_GOLDEN = 2, NB_VP4_DC_TYPES,
  VP4_DC_UNDEFINED = NB_VP4_DC_TYPES
}
 

Functions

static int theora_decode_header (AVCodecContext *avctx, GetBitContext *gb)
 
static int theora_decode_tables (AVCodecContext *avctx, GetBitContext *gb)
 
static av_cold void free_tables (AVCodecContext *avctx)
 
static void vp3_decode_flush (AVCodecContext *avctx)
 
static av_cold int vp3_decode_end (AVCodecContext *avctx)
 
static int init_block_mapping (Vp3DecodeContext *s)
 This function sets up all of the various blocks mappings: superblocks <-> fragments, macroblocks <-> fragments, superblocks <-> macroblocks. More...
 
static void init_dequantizer (Vp3DecodeContext *s, int qpi)
 
static void init_loop_filter (Vp3DecodeContext *s)
 
static int unpack_superblocks (Vp3DecodeContext *s, GetBitContext *gb)
 
static int unpack_modes (Vp3DecodeContext *s, GetBitContext *gb)
 
static int vp4_get_mv (Vp3DecodeContext *s, GetBitContext *gb, int axis, int last_motion)
 
static int unpack_vectors (Vp3DecodeContext *s, GetBitContext *gb)
 
static int unpack_block_qpis (Vp3DecodeContext *s, GetBitContext *gb)
 
static int get_eob_run (GetBitContext *gb, int token)
 
static int get_coeff (GetBitContext *gb, int token, int16_t *coeff)
 
static int unpack_vlcs (Vp3DecodeContext *s, GetBitContext *gb, VLC *table, int coeff_index, int plane, int eob_run)
 
static void reverse_dc_prediction (Vp3DecodeContext *s, int first_fragment, int fragment_width, int fragment_height)
 
static int unpack_dct_coeffs (Vp3DecodeContext *s, GetBitContext *gb)
 
static void apply_loop_filter (Vp3DecodeContext *s, int plane, int ystart, int yend)
 
static int vp3_dequant (Vp3DecodeContext *s, Vp3Fragment *frag, int plane, int inter, int16_t block[64])
 Pull DCT tokens from the 64 levels to decode and dequant the coefficients for the next block in coding order. More...
 
static void vp3_draw_horiz_band (Vp3DecodeContext *s, int y)
 called when all pixels up to row y are complete More...
 
static void await_reference_row (Vp3DecodeContext *s, Vp3Fragment *fragment, int motion_y, int y)
 Wait for the reference frame of the current fragment. More...
 
static void render_slice (Vp3DecodeContext *s, int slice)
 
static av_cold int allocate_tables (AVCodecContext *avctx)
 Allocate tables for per-frame data in Vp3DecodeContext. More...
 
static av_cold int init_frames (Vp3DecodeContext *s)
 
static av_cold int vp3_decode_init (AVCodecContext *avctx)
 
static int update_frames (AVCodecContext *avctx)
 Release and shuffle frames after decode finishes. More...
 
static int vp3_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static int read_huffman_tree (HuffTable *huff, GetBitContext *gb, int length, AVCodecContext *avctx)
 

Variables

static const int ModeAlphabet [6][CODING_MODE_COUNT]
 
static const uint8_t hilbert_offset [16][2]
 
static const uint8_t vp4_pred_block_type_map [8]
 
AVCodec ff_vp3_decoder
 

Detailed Description

On2 VP3/VP4 Video Decoder.

VP3 Video Decoder by Mike Melanson (mike at multimedia.cx) For more information about the VP3 coding process, visit: http://wiki.multimedia.cx/index.php?title=On2_VP3

Theora decoder by Alex Beregszaszi

Definition in file vp3.c.

Macro Definition Documentation

#define VP3_MV_VLC_BITS   6

Definition at line 52 of file vp3.c.

Referenced by unpack_vectors(), and vp3_decode_init().

#define VP4_MV_VLC_BITS   6

Definition at line 53 of file vp3.c.

Referenced by vp3_decode_init(), and vp4_get_mv().

#define SUPERBLOCK_VLC_BITS   6

Definition at line 54 of file vp3.c.

Referenced by unpack_block_qpis(), unpack_superblocks(), and vp3_decode_init().

#define FRAGMENT_PIXELS   8

Definition at line 56 of file vp3.c.

Referenced by vp3_decode_init().

#define SB_NOT_CODED   0

Definition at line 65 of file vp3.c.

Referenced by unpack_superblocks().

#define SB_PARTIALLY_CODED   1

Definition at line 66 of file vp3.c.

Referenced by unpack_superblocks().

#define SB_FULLY_CODED   2

Definition at line 67 of file vp3.c.

Referenced by unpack_superblocks().

#define MAXIMUM_LONG_BIT_RUN   4129

Definition at line 72 of file vp3.c.

Referenced by unpack_block_qpis(), and unpack_superblocks().

#define MODE_INTER_NO_MV   0

Definition at line 74 of file vp3.c.

Referenced by unpack_modes(), and unpack_superblocks().

#define MODE_INTRA   1

Definition at line 75 of file vp3.c.

Referenced by render_slice(), and unpack_modes().

#define MODE_INTER_PLUS_MV   2

Definition at line 76 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_LAST_MV   3

Definition at line 77 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_PRIOR_LAST   4

Definition at line 78 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_USING_GOLDEN   5

Definition at line 79 of file vp3.c.

Referenced by await_reference_row(), and render_slice().

#define MODE_GOLDEN_MV   6

Definition at line 80 of file vp3.c.

Referenced by await_reference_row(), render_slice(), and unpack_vectors().

#define MODE_INTER_FOURMV   7

Definition at line 81 of file vp3.c.

Referenced by unpack_vectors().

#define CODING_MODE_COUNT   8

Definition at line 82 of file vp3.c.

Referenced by unpack_modes().

#define MODE_COPY   8
#define MIN_DEQUANT_VAL   2

Definition at line 161 of file vp3.c.

#define TOKEN_EOB (   eob_run)    ((eob_run) << 2)

Definition at line 255 of file vp3.c.

Referenced by unpack_dct_coeffs(), and unpack_vlcs().

#define TOKEN_ZERO_RUN (   coeff,
  zero_run 
)    (((coeff) * 512) + ((zero_run) << 2) + 1)

Definition at line 256 of file vp3.c.

Referenced by unpack_dct_coeffs(), and unpack_vlcs().

#define TOKEN_COEFF (   coeff)    (((coeff) * 4) + 2)

Definition at line 257 of file vp3.c.

Referenced by unpack_dct_coeffs(), and unpack_vlcs().

#define BLOCK_X   (2 * mb_x + (k & 1))

Definition at line 643 of file vp3.c.

Referenced by unpack_modes(), and unpack_vectors().

#define BLOCK_Y   (2 * mb_y + (k >> 1))

Definition at line 644 of file vp3.c.

Referenced by unpack_modes(), and unpack_vectors().

#define SET_CHROMA_MODES
Value:
if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
frag[s->fragment_start[1]].coding_method = coding_mode; \
if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
frag[s->fragment_start[2]].coding_method = coding_mode;
#define MODE_COPY
Definition: vp3.c:85
#define s(width, name)
Definition: cbs_vp9.c:257
if(ret)

Referenced by unpack_modes().

#define COMPATIBLE_FRAME (   x)    (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)

Definition at line 1638 of file vp3.c.

Referenced by reverse_dc_prediction().

#define DC_COEFF (   u)    s->all_fragments[u].dc

Definition at line 1640 of file vp3.c.

Referenced by reverse_dc_prediction().

#define PUL   8

Referenced by reverse_dc_prediction().

#define PU   4

Referenced by reverse_dc_prediction().

#define PUR   2

Referenced by reverse_dc_prediction().

#define PL   1

Referenced by reverse_dc_prediction().

#define TRANSPOSE (   x)    (((x) >> 3) | (((x) & 7) << 3))

Referenced by vp3_decode_init().

Enumeration Type Documentation

anonymous enum
Enumerator
VP4_DC_INTRA 
VP4_DC_INTER 
VP4_DC_GOLDEN 
NB_VP4_DC_TYPES 
VP4_DC_UNDEFINED 

Definition at line 137 of file vp3.c.

Function Documentation

static int theora_decode_header ( AVCodecContext avctx,
GetBitContext gb 
)
static
static int theora_decode_tables ( AVCodecContext avctx,
GetBitContext gb 
)
static
static av_cold void free_tables ( AVCodecContext avctx)
static

Definition at line 314 of file vp3.c.

Referenced by allocate_tables(), and vp3_decode_end().

static void vp3_decode_flush ( AVCodecContext avctx)
static

Definition at line 330 of file vp3.c.

Referenced by read_huffman_tree(), and vp3_decode_end().

static av_cold int vp3_decode_end ( AVCodecContext avctx)
static

Definition at line 342 of file vp3.c.

Referenced by read_huffman_tree(), and vp3_decode_frame().

static int init_block_mapping ( Vp3DecodeContext s)
static

This function sets up all of the various blocks mappings: superblocks <-> fragments, macroblocks <-> fragments, superblocks <-> macroblocks.

Returns
0 is successful; returns 1 if anything went wrong.

Definition at line 382 of file vp3.c.

Referenced by allocate_tables().

static void init_dequantizer ( Vp3DecodeContext s,
int  qpi 
)
static

Definition at line 416 of file vp3.c.

Referenced by vp3_decode_frame().

static void init_loop_filter ( Vp3DecodeContext s)
static

Definition at line 459 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_superblocks ( Vp3DecodeContext s,
GetBitContext gb 
)
static

Definition at line 468 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_modes ( Vp3DecodeContext s,
GetBitContext gb 
)
static

Definition at line 788 of file vp3.c.

Referenced by vp3_decode_frame().

static int vp4_get_mv ( Vp3DecodeContext s,
GetBitContext gb,
int  axis,
int  last_motion 
)
static

Definition at line 891 of file vp3.c.

Referenced by unpack_vectors().

static int unpack_vectors ( Vp3DecodeContext s,
GetBitContext gb 
)
static

Definition at line 902 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_block_qpis ( Vp3DecodeContext s,
GetBitContext gb 
)
static

Definition at line 1100 of file vp3.c.

Referenced by vp3_decode_frame().

static int get_eob_run ( GetBitContext gb,
int  token 
)
inlinestatic

Definition at line 1143 of file vp3.c.

Referenced by unpack_dct_coeffs(), and unpack_vlcs().

static int get_coeff ( GetBitContext gb,
int  token,
int16_t *  coeff 
)
inlinestatic

Definition at line 1151 of file vp3.c.

Referenced by unpack_dct_coeffs(), and unpack_vlcs().

static int unpack_vlcs ( Vp3DecodeContext s,
GetBitContext gb,
VLC table,
int  coeff_index,
int  plane,
int  eob_run 
)
static

Definition at line 1179 of file vp3.c.

Referenced by unpack_dct_coeffs().

static void reverse_dc_prediction ( Vp3DecodeContext s,
int  first_fragment,
int  fragment_width,
int  fragment_height 
)
static

Definition at line 1642 of file vp3.c.

Referenced by unpack_dct_coeffs(), and unpack_vlcs().

static int unpack_dct_coeffs ( Vp3DecodeContext s,
GetBitContext gb 
)
static

Definition at line 1300 of file vp3.c.

Referenced by vp3_decode_frame().

static void apply_loop_filter ( Vp3DecodeContext s,
int  plane,
int  ystart,
int  yend 
)
static

Definition at line 1792 of file vp3.c.

Referenced by render_slice(), vc1_decode_p_blocks(), and vp3_decode_frame().

static int vp3_dequant ( Vp3DecodeContext s,
Vp3Fragment frag,
int  plane,
int  inter,
int16_t  block[64] 
)
inlinestatic

Pull DCT tokens from the 64 levels to decode and dequant the coefficients for the next block in coding order.

Definition at line 1859 of file vp3.c.

Referenced by render_slice().

static void vp3_draw_horiz_band ( Vp3DecodeContext s,
int  y 
)
static

called when all pixels up to row y are complete

Definition at line 1904 of file vp3.c.

Referenced by render_slice(), and vp3_decode_frame().

static void await_reference_row ( Vp3DecodeContext s,
Vp3Fragment fragment,
int  motion_y,
int  y 
)
static

Wait for the reference frame of the current fragment.

The progress value is in luma pixel rows.

Definition at line 1946 of file vp3.c.

Referenced by render_slice().

static void render_slice ( Vp3DecodeContext s,
int  slice 
)
static

Definition at line 2068 of file vp3.c.

Referenced by vp3_decode_frame().

static av_cold int allocate_tables ( AVCodecContext avctx)
static

Allocate tables for per-frame data in Vp3DecodeContext.

Definition at line 2268 of file vp3.c.

Referenced by vp3_decode_init().

static av_cold int init_frames ( Vp3DecodeContext s)
static

Definition at line 2311 of file vp3.c.

Referenced by vp3_decode_init().

static av_cold int vp3_decode_init ( AVCodecContext avctx)
static

Definition at line 2323 of file vp3.c.

Referenced by read_huffman_tree(), and vp3_decode_frame().

static int update_frames ( AVCodecContext avctx)
static

Release and shuffle frames after decode finishes.

Definition at line 2509 of file vp3.c.

Referenced by vp3_decode_frame().

static int vp3_decode_frame ( AVCodecContext avctx,
void data,
int got_frame,
AVPacket avpkt 
)
static

Definition at line 2591 of file vp3.c.

Referenced by read_huffman_tree().

static int read_huffman_tree ( HuffTable huff,
GetBitContext gb,
int  length,
AVCodecContext avctx 
)
static

Definition at line 2837 of file vp3.c.

Variable Documentation

const int ModeAlphabet[6][CODING_MODE_COUNT]
static

Definition at line 92 of file vp3.c.

Referenced by unpack_modes().

const uint8_t hilbert_offset[16][2]
static
Initial value:
= {
{ 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 },
{ 0, 2 }, { 0, 3 }, { 1, 3 }, { 1, 2 },
{ 2, 2 }, { 2, 3 }, { 3, 3 }, { 3, 2 },
{ 3, 1 }, { 2, 1 }, { 2, 0 }, { 3, 0 }
}

Definition at line 130 of file vp3.c.

Referenced by init_block_mapping(), render_slice(), and unpack_dct_coeffs().

const uint8_t vp4_pred_block_type_map[8]
static
Initial value:
= {
}
#define MODE_INTER_PLUS_MV
Definition: vp3.c:76
#define MODE_INTRA
Definition: vp3.c:75
#define MODE_GOLDEN_MV
Definition: vp3.c:80
#define MODE_USING_GOLDEN
Definition: vp3.c:79
#define MODE_INTER_FOURMV
Definition: vp3.c:81
#define MODE_INTER_PRIOR_LAST
Definition: vp3.c:78
#define MODE_INTER_NO_MV
Definition: vp3.c:74
#define MODE_INTER_LAST_MV
Definition: vp3.c:77

Definition at line 145 of file vp3.c.

Referenced by unpack_dct_coeffs().

AVCodec ff_vp3_decoder
Initial value:
= {
.name = "vp3",
.long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
.priv_data_size = sizeof(Vp3DecodeContext),
.close = vp3_decode_end,
.update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
}
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
static void flush(AVCodecContext *avctx)
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
static av_cold int vp3_decode_init(AVCodecContext *avctx)
Definition: vp3.c:2323
static av_cold int vp3_decode_end(AVCodecContext *avctx)
Definition: vp3.c:342
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static void vp3_decode_flush(AVCodecContext *avctx)
Definition: vp3.c:330
#define FF_CODEC_CAP_ALLOCATE_PROGRESS
Definition: internal.h:75
static int vp3_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: vp3.c:2591
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:115
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:106
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:154
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: codec.h:44
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have update_thread_context() run it in the next thread.Add AV_CODEC_CAP_FRAME_THREADS to the codec capabilities.There will be very little speed gain at this point but it should work.If there are inter-frame dependencies
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50

Definition at line 3180 of file vp3.c.