On2 VP3 Video Decoder. More...

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

Data Structures
struct	Vp3Fragment

struct	Vp3DecodeContext

Macros
#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) << 9) + ((zero_run) << 2) + 1)

#define	TOKEN_COEFF(coeff) (((coeff) << 2) + 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	copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char)&to->end_field - (char)&to->start_field)

Functions
static int	theora_decode_header (AVCodecContext avctx, GetBitContext gb)

static int	theora_decode_tables (AVCodecContext avctx, GetBitContext gb)

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.

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	unpack_vectors (Vp3DecodeContext s, GetBitContext gb)

static int	unpack_block_qpis (Vp3DecodeContext s, GetBitContext gb)

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.

static void	vp3_draw_horiz_band (Vp3DecodeContext *s, int y)
	called when all pixels up to row y are complete

static void	await_reference_row (Vp3DecodeContext s, Vp3Fragment fragment, int motion_y, int y)
	Wait for the reference frame of the current fragment.

static void	render_slice (Vp3DecodeContext *s, int slice)

static av_cold int	allocate_tables (AVCodecContext *avctx)
	Allocate tables for per-frame data in Vp3DecodeContext.

static av_cold int	vp3_decode_init (AVCodecContext *avctx)

static void	update_frames (AVCodecContext *avctx)
	Release and shuffle frames after decode finishes.

static int	vp3_update_thread_context (AVCodecContext dst, const AVCodecContext src)

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

static int	read_huffman_tree (AVCodecContext avctx, GetBitContext gb)

static int	vp3_init_thread_copy (AVCodecContext *avctx)

Variables
static const int	ModeAlphabet [6][CODING_MODE_COUNT]

static const uint8_t	hilbert_offset [16][2]

AVCodec	ff_vp3_decoder

Detailed Description

On2 VP3 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 FRAGMENT_PIXELS 8

Definition at line 47 of file vp3.c.

Referenced by vp3_decode_init().

#define SB_NOT_CODED 0

Definition at line 56 of file vp3.c.

Referenced by unpack_superblocks().

#define SB_PARTIALLY_CODED 1

Definition at line 57 of file vp3.c.

Referenced by unpack_superblocks().

#define SB_FULLY_CODED 2

Definition at line 58 of file vp3.c.

Referenced by unpack_superblocks().

#define MAXIMUM_LONG_BIT_RUN 4129

Definition at line 63 of file vp3.c.

Referenced by unpack_block_qpis(), and unpack_superblocks().

#define MODE_INTER_NO_MV 0

Definition at line 65 of file vp3.c.

Referenced by unpack_modes(), and unpack_superblocks().

#define MODE_INTRA 1

Definition at line 66 of file vp3.c.

Referenced by render_slice(), and unpack_modes().

#define MODE_INTER_PLUS_MV 2

Definition at line 67 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_LAST_MV 3

Definition at line 68 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_PRIOR_LAST 4

Definition at line 69 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_USING_GOLDEN 5

Definition at line 70 of file vp3.c.

Referenced by await_reference_row(), and render_slice().

#define MODE_GOLDEN_MV 6

Definition at line 71 of file vp3.c.

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

#define MODE_INTER_FOURMV 7

Definition at line 72 of file vp3.c.

Referenced by unpack_vectors().

#define CODING_MODE_COUNT 8

Definition at line 73 of file vp3.c.

Referenced by unpack_modes().

#define MODE_COPY 8

Definition at line 76 of file vp3.c.

Referenced by apply_loop_filter(), render_slice(), reverse_dc_prediction(), unpack_modes(), unpack_superblocks(), and unpack_vectors().

#define MIN_DEQUANT_VAL 2

Definition at line 130 of file vp3.c.

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

Definition at line 208 of file vp3.c.

Referenced by unpack_vlcs().

#define TOKEN_ZERO_RUN	(	coeff,
		zero_run
	)	(((coeff) << 9) + ((zero_run) << 2) + 1)

Definition at line 209 of file vp3.c.

Referenced by unpack_vlcs().

#define TOKEN_COEFF ( coeff ) (((coeff) << 2) + 2)

Definition at line 210 of file vp3.c.

Referenced by unpack_vlcs().

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

Referenced by unpack_modes(), and unpack_vectors().

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

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;

Referenced by unpack_modes().

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

Definition at line 1137 of file vp3.c.

Referenced by reverse_dc_prediction().

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

Definition at line 1139 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

#define copy_fields	(	to,
		from,
		start_field,
		end_field
	)	memcpy(&to->start_field, &from->start_field, (char)&to->end_field - (char)&to->start_field)

Function Documentation

static int theora_decode_header	(	AVCodecContext *	avctx,
		GetBitContext *	gb
	)

static

Referenced by vp3_decode_frame().

static int theora_decode_tables	(	AVCodecContext *	avctx,
		GetBitContext *	gb
	)

static

Referenced by vp3_decode_frame().

static void vp3_decode_flush ( AVCodecContext * avctx )

static

Definition at line 264 of file vp3.c.

Referenced by vp3_decode_end().

static av_cold int vp3_decode_end ( AVCodecContext * avctx )

static

Definition at line 284 of file vp3.c.

Referenced by allocate_tables(), 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 330 of file vp3.c.

Referenced by allocate_tables().

static void init_dequantizer	(	Vp3DecodeContext *	s,
		int	qpi
	)

static

Definition at line 361 of file vp3.c.

static void init_loop_filter ( Vp3DecodeContext * s )

static

Definition at line 401 of file vp3.c.

static int unpack_superblocks	(	Vp3DecodeContext *	s,
		GetBitContext *	gb
	)

static

Definition at line 430 of file vp3.c.

static int unpack_modes	(	Vp3DecodeContext *	s,
		GetBitContext *	gb
	)

static

Definition at line 584 of file vp3.c.

static int unpack_vectors	(	Vp3DecodeContext *	s,
		GetBitContext *	gb
	)

static

Definition at line 690 of file vp3.c.

static int unpack_block_qpis	(	Vp3DecodeContext *	s,
		GetBitContext *	gb
	)

static

Definition at line 867 of file vp3.c.

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

static

Definition at line 921 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 1141 of file vp3.c.

Referenced by unpack_dct_coeffs().

static int unpack_dct_coeffs	(	Vp3DecodeContext *	s,
		GetBitContext *	gb
	)

static

Definition at line 1045 of file vp3.c.

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

static

Definition at line 1291 of file vp3.c.

Referenced by render_slice(), and vc1_decode_p_blocks().

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 1358 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 1403 of file vp3.c.

Referenced by render_slice().

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 1443 of file vp3.c.

Referenced by render_slice().

static void render_slice	(	Vp3DecodeContext *	s,
		int	slice
	)

static

Definition at line 1465 of file vp3.c.

static av_cold int allocate_tables ( AVCodecContext * avctx )

static

Allocate tables for per-frame data in Vp3DecodeContext.

Definition at line 1629 of file vp3.c.

Referenced by vp3_decode_init(), and vp3_update_thread_context().

static av_cold int vp3_decode_init ( AVCodecContext * avctx )

static

Definition at line 1660 of file vp3.c.

Referenced by vp3_decode_frame().

static void update_frames ( AVCodecContext * avctx )

static

Release and shuffle frames after decode finishes.

Definition at line 1837 of file vp3.c.

Referenced by vp3_update_thread_context().

static int vp3_update_thread_context	(	AVCodecContext *	dst,
		const AVCodecContext *	src
	)

static

Definition at line 1859 of file vp3.c.

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

static

Definition at line 1912 of file vp3.c.

static int read_huffman_tree	(	AVCodecContext *	avctx,
		GetBitContext *	gb
	)

static

Definition at line 2099 of file vp3.c.

static int vp3_init_thread_copy ( AVCodecContext * avctx )

static

Definition at line 2134 of file vp3.c.

Variable Documentation

const int ModeAlphabet[6][CODING_MODE_COUNT]

static

Definition at line 83 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 123 of file vp3.c.

Referenced by init_block_mapping(), and render_slice().

AVCodec ff_vp3_decoder

Initial value:

= {
    .name                  = "vp3",
    .type                  = AVMEDIA_TYPE_VIDEO,
    .id                    = AV_CODEC_ID_VP3,
    .priv_data_size        = sizeof(Vp3DecodeContext),
    .init                  = vp3_decode_init,
    .close                 = vp3_decode_end,
    .decode                = vp3_decode_frame,
    .capabilities          = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
                             CODEC_CAP_FRAME_THREADS,
    .flush                 = vp3_decode_flush,
    .long_name             = NULL_IF_CONFIG_SMALL("On2 VP3"),
    .init_thread_copy      = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
    .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
}

Definition at line 2438 of file vp3.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation