hvirtual/quicktime/ffmpeg/libavcodec/ffv1.c File Reference

#include "common.h"
#include "bitstream.h"
#include "avcodec.h"
#include "dsputil.h"
#include "rangecoder.h"
#include "golomb.h"

Include dependency graph for ffv1.c:

Go to the source code of this file.

Data Structures

struct VlcState

struct PlaneContext

struct FFV1Context

Defines

#define MAX_PLANES 4

#define CONTEXT_SIZE 32

Functions

static always_inline int fold (int diff, int bits)

static int predict (int_fast16_t *src, int_fast16_t *last)

static int get_context (FFV1Context *f, int_fast16_t *src, int_fast16_t *last, int_fast16_t *last2)

static void put_symbol (RangeCoder *c, uint8_t *state, int v, int is_signed)

static int get_symbol (RangeCoder *c, uint8_t *state, int is_signed)

static void update_vlc_state (VlcState *const state, const int v)

static void put_vlc_symbol (PutBitContext *pb, VlcState *const state, int v, int bits)

static int get_vlc_symbol (GetBitContext *gb, VlcState *const state, int bits)

static int encode_line (FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits)

static void encode_plane (FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index)

static void encode_rgb_frame (FFV1Context *s, uint32_t *src, int w, int h, int stride)

static void write_quant_table (RangeCoder *c, int16_t *quant_table)

static void write_header (FFV1Context *f)

static int common_init (AVCodecContext *avctx)

static int encode_init (AVCodecContext *avctx)

static void clear_state (FFV1Context *f)

static int encode_frame (AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)

static void common_end (FFV1Context *s)

static int encode_end (AVCodecContext *avctx)

static void decode_line (FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits)

static void decode_plane (FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index)

static void decode_rgb_frame (FFV1Context *s, uint32_t *src, int w, int h, int stride)

static int read_quant_table (RangeCoder *c, int16_t *quant_table, int scale)

static int read_header (FFV1Context *f)

static int decode_init (AVCodecContext *avctx)

static int decode_frame (AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)

Variables

static const int8_t quant3 [256]

static const int8_t quant5 [256]

static const int8_t quant7 [256]

static const int8_t quant9 [256]

static const int8_t quant11 [256]

static const int8_t quant13 [256]

static const uint8_t log2_run [32]

AVCodec ffv1_decoder

Detailed Description

FF Video Codec 1 (an experimental lossless codec)

Definition in file ffv1.c.

Define Documentation

#define CONTEXT_SIZE 32

Definition at line 35 of file ffv1.c.

Referenced by clear_state(), encode_init(), read_header(), read_quant_table(), write_header(), and write_quant_table().

#define MAX_PLANES 4

Definition at line 34 of file ffv1.c.

Function Documentation

static void clear_state ( FFV1Context * f ) [static]

Definition at line 619 of file ffv1.c.

References FFV1Context::ac, VlcState::bias, PlaneContext::context_count, CONTEXT_SIZE, VlcState::count, VlcState::drift, VlcState::error_sum, PlaneContext::interlace_bit_state, FFV1Context::plane, FFV1Context::plane_count, PlaneContext::state, and PlaneContext::vlc_state.

Referenced by decode_frame(), and encode_frame().

static void common_end ( FFV1Context * s ) [static]

Definition at line 697 of file ffv1.c.

References av_freep(), FFV1Context::plane, FFV1Context::plane_count, and PlaneContext::state.

Referenced by decode_end(), and encode_end().

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static int common_init ( AVCodecContext * avctx ) [static]

Definition at line 531 of file ffv1.c.

References FFV1Context::avctx, FFV1Context::dsp, dsputil_init(), AVCodecContext::flags, FFV1Context::flags, AVCodecContext::height, FFV1Context::height, height, AVCodecContext::priv_data, s, AVCodecContext::width, FFV1Context::width, and width.

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static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			`[static]`

Definition at line 944 of file ffv1.c.

References FFV1Context::ac, av_log(), AV_LOG_ERROR, FFV1Context::avctx, RangeCoder::bytestream, RangeCoder::bytestream_start, FFV1Context::c, c, FFV1Context::chroma_h_shift, FFV1Context::chroma_v_shift, clear_state(), FFV1Context::colorspace, AVCodecContext::debug, decode_plane(), decode_rgb_frame(), emms_c, ff_build_rac_states(), FF_DEBUG_PICT_INFO, FF_I_TYPE, ff_init_range_decoder(), FFV1Context::gb, get_bits_count(), AVCodecContext::get_buffer, get_rac(), FFV1Context::height, height, init_get_bits(), LL, picture, FFV1Context::picture, FFV1Context::picture_number, AVCodecContext::priv_data, read_header(), AVCodecContext::release_buffer, FFV1Context::width, and width.

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static int decode_init ( AVCodecContext * avctx ) [static]

Definition at line 935 of file ffv1.c.

References common_init().

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static void decode_line	(	FFV1Context *	s,
		int	w,
		int_fast16_t *	sample[2],
		int	plane_index,
		int	bits
	)			`[inline, static]`

Definition at line 716 of file ffv1.c.

References FFV1Context::ac, FFV1Context::c, c, context, FFV1Context::gb, get_bits(), get_bits1(), get_context(), get_symbol(), get_vlc_symbol(), log2_run, FFV1Context::plane, predict(), FFV1Context::run_index, PlaneContext::state, and PlaneContext::vlc_state.

Referenced by decode_plane(), and decode_rgb_frame().

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static void decode_plane	(	FFV1Context *	s,
		uint8_t *	src,
		int	w,
		int	h,
		int	stride,
		int	plane_index
	)			`[static]`

Definition at line 773 of file ffv1.c.

References decode_line(), and FFV1Context::run_index.

Referenced by decode_frame().

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static void decode_rgb_frame	(	FFV1Context *	s,
		uint32_t *	src,
		int	w,
		int	h,
		int	stride
	)			`[static]`

Definition at line 800 of file ffv1.c.

References b, decode_line(), r, and FFV1Context::run_index.

Referenced by decode_frame().

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static int encode_end ( AVCodecContext * avctx ) [static]

Definition at line 707 of file ffv1.c.

References common_end(), AVCodecContext::priv_data, and s.

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static int encode_frame	(	AVCodecContext *	avctx,
		unsigned char *	buf,
		int	buf_size,
		void *	data
	)			`[static]`

Definition at line 641 of file ffv1.c.

References FFV1Context::ac, FFV1Context::c, c, FFV1Context::chroma_h_shift, FFV1Context::chroma_v_shift, clear_state(), FFV1Context::colorspace, emms_c, encode_plane(), encode_rgb_frame(), ff_build_rac_states(), FF_I_TYPE, ff_init_range_encoder(), ff_rac_terminate(), flush_put_bits(), AVCodecContext::gop_size, FFV1Context::height, height, init_put_bits(), LL, FFV1Context::pb, FFV1Context::picture, FFV1Context::picture_number, AVCodecContext::priv_data, put_bits_count(), put_rac(), FFV1Context::width, width, and write_header().

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static int encode_init ( AVCodecContext * avctx ) [static]

Definition at line 548 of file ffv1.c.

References FFV1Context::ac, av_log(), AV_LOG_ERROR, av_malloc(), avcodec_get_chroma_sub_sample(), FFV1Context::chroma_h_shift, FFV1Context::chroma_v_shift, AVCodecContext::coded_frame, AVCodecContext::coder_type, FFV1Context::colorspace, common_init(), PlaneContext::context_count, AVCodecContext::context_model, CONTEXT_SIZE, FF_COMPLIANCE_EXPERIMENTAL, FFV1Context::picture, FFV1Context::picture_number, AVCodecContext::pix_fmt, PIX_FMT_RGBA32, PIX_FMT_YUV410P, PIX_FMT_YUV411P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, FFV1Context::plane, FFV1Context::plane_count, AVCodecContext::priv_data, quant11, quant5, FFV1Context::quant_table, s, PlaneContext::state, AVCodecContext::strict_std_compliance, FFV1Context::version, and PlaneContext::vlc_state.

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static int encode_line	(	FFV1Context *	s,
		int	w,
		int_fast16_t *	sample[2],
		int	plane_index,
		int	bits
	)			`[inline, static]`

Definition at line 357 of file ffv1.c.

References FFV1Context::ac, av_log(), AV_LOG_ERROR, FFV1Context::avctx, PutBitContext::buf, PutBitContext::buf_end, RangeCoder::bytestream, RangeCoder::bytestream_end, FFV1Context::c, c, context, fold(), get_context(), log2_run, FFV1Context::pb, FFV1Context::plane, predict(), put_bits(), put_bits_count(), put_symbol(), put_vlc_symbol(), FFV1Context::run_index, PlaneContext::state, and PlaneContext::vlc_state.

Referenced by encode_plane(), and encode_rgb_frame().

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static void encode_plane	(	FFV1Context *	s,
		uint8_t *	src,
		int	w,
		int	h,
		int	stride,
		int	plane_index
	)			`[static]`

Definition at line 435 of file ffv1.c.

References FFV1Context::avctx, AVCodecContext::context_model, encode_line(), and FFV1Context::run_index.

Referenced by encode_frame().

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static void encode_rgb_frame	(	FFV1Context *	s,
		uint32_t *	src,
		int	w,
		int	h,
		int	stride
	)			`[static]`

Definition at line 458 of file ffv1.c.

References FFV1Context::avctx, b, AVCodecContext::context_model, encode_line(), r, and FFV1Context::run_index.

Referenced by encode_frame().

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static always_inline int fold	(	int	diff,
		int	bits
	)			`[static]`

Definition at line 187 of file ffv1.c.

Referenced by encode_line(), get_vlc_symbol(), and put_vlc_symbol().

static int get_context	(	FFV1Context *	f,
		int_fast16_t *	src,
		int_fast16_t *	last,
		int_fast16_t *	last2
	)			`[inline, static]`

Definition at line 207 of file ffv1.c.

References LL, FFV1Context::quant_table, and T.

Referenced by decode_line(), and encode_line().

static int get_symbol	(	RangeCoder *	c,
		uint8_t *	state,
		int	is_signed
	)			`[inline, static]`

Definition at line 248 of file ffv1.c.

References a, e, and get_rac().

Referenced by decode_header(), decode_line(), decode_q_branch(), read_header(), and read_quant_table().

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static int get_vlc_symbol	(	GetBitContext *	gb,
		VlcState *const	state,
		int	bits
	)			`[inline, static]`

Definition at line 329 of file ffv1.c.

References VlcState::bias, VlcState::count, VlcState::drift, fold(), get_sr_golomb(), and update_vlc_state().

Referenced by decode_line().

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static int predict	(	int_fast16_t *	src,
		int_fast16_t *	last
	)			`[inline, static]`

Definition at line 199 of file ffv1.c.

References T.

static void put_symbol	(	RangeCoder *	c,
		uint8_t *	state,
		int	v,
		int	is_signed
	)			`[inline, static]`

Definition at line 222 of file ffv1.c.

References a, ABS, e, and put_rac().

Referenced by encode_header(), encode_line(), encode_q_branch(), write_header(), and write_quant_table().

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static void put_vlc_symbol	(	PutBitContext *	pb,
		VlcState *const	state,
		int	v,
		int	bits
	)			`[inline, static]`

Definition at line 302 of file ffv1.c.

References VlcState::bias, VlcState::count, VlcState::drift, fold(), set_sr_golomb(), and update_vlc_state().

Referenced by encode_line().

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static int read_header ( FFV1Context * f ) [static]

Definition at line 870 of file ffv1.c.

References FFV1Context::ac, av_log(), AV_LOG_ERROR, av_malloc(), FFV1Context::avctx, FFV1Context::c, c, FFV1Context::chroma_h_shift, FFV1Context::chroma_v_shift, AVCodecContext::coder_type, FFV1Context::colorspace, PlaneContext::context_count, CONTEXT_SIZE, get_rac(), get_symbol(), AVCodecContext::pix_fmt, PIX_FMT_RGBA32, PIX_FMT_YUV410P, PIX_FMT_YUV411P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, FFV1Context::plane, FFV1Context::plane_count, FFV1Context::quant_table, read_quant_table(), PlaneContext::state, FFV1Context::version, and PlaneContext::vlc_state.

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static int read_quant_table	(	RangeCoder *	c,
		int16_t *	quant_table,
		int	scale
	)			`[static]`

Definition at line 842 of file ffv1.c.

References CONTEXT_SIZE, and get_symbol().

Referenced by read_header().

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static void update_vlc_state	(	VlcState *const	state,
		const int	v
	)			`[inline, static]`

Definition at line 271 of file ffv1.c.

References ABS, VlcState::bias, VlcState::count, VlcState::drift, and VlcState::error_sum.

Referenced by get_vlc_symbol(), and put_vlc_symbol().

static void write_header ( FFV1Context * f ) [static]

Definition at line 512 of file ffv1.c.

References FFV1Context::avctx, FFV1Context::c, c, FFV1Context::chroma_h_shift, FFV1Context::chroma_v_shift, AVCodecContext::coder_type, FFV1Context::colorspace, CONTEXT_SIZE, put_rac(), put_symbol(), FFV1Context::quant_table, FFV1Context::version, and write_quant_table().

Referenced by encode_frame(), and toolame().

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static void write_quant_table	(	RangeCoder *	c,
		int16_t *	quant_table
	)			`[static]`

Definition at line 497 of file ffv1.c.

References CONTEXT_SIZE, and put_symbol().

Referenced by write_header().

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Variable Documentation

AVCodec ffv1_decoder

Initial value:

 {
    "ffv1",
    CODEC_TYPE_VIDEO,
    CODEC_ID_FFV1,
    sizeof(FFV1Context),
    decode_init,
    NULL,
    NULL,
    decode_frame,
    CODEC_CAP_DR1 ,
    NULL
}

Definition at line 1017 of file ffv1.c.

Referenced by avcodec_register_all().

const uint8_t log2_run[32] [static]

Initial value:

{
 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 
 4, 4, 5, 5, 6, 6, 7, 7, 
 8, 9,10,11,12,13,14,15,
}

Definition at line 146 of file ffv1.c.

Referenced by decode_line(), and encode_line().

const int8_t quant11[256] [static]

Initial value:

{
 0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,
 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,
-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,
}

Definition at line 109 of file ffv1.c.

Referenced by encode_init().

const int8_t quant13[256] [static]

Initial value:

{
 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1,
}

Definition at line 127 of file ffv1.c.

const int8_t quant3[256] [static]

Initial value:

{
 0, 0, 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,-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, 0,
}

Definition at line 37 of file ffv1.c.

const int8_t quant5[256] [static]

Initial value:

{
 0, 1, 1, 1, 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,-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,-1,-1,-1,
}

Definition at line 55 of file ffv1.c.

Referenced by encode_init().

const int8_t quant7[256] [static]

Initial value:

{
 0, 1, 1, 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, 3, 3, 3, 3, 3, 3, 3, 3,
 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-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,-1,-1,
}

Definition at line 73 of file ffv1.c.

const int8_t quant9[256] [static]

Initial value:

{
 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,
 3, 3, 3, 3, 3, 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,-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,-3,-3,-3,-3,
-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1,
}

Definition at line 91 of file ffv1.c.


Data Structures
struct	VlcState
struct	PlaneContext
struct	FFV1Context
Defines
#define	MAX_PLANES 4
#define	CONTEXT_SIZE 32
Functions
static always_inline int	fold (int diff, int bits)
static int	predict (int_fast16_t src, int_fast16_t last)
static int	get_context (FFV1Context f, int_fast16_t src, int_fast16_t last, int_fast16_t last2)
static void	put_symbol (RangeCoder c, uint8_t state, int v, int is_signed)
static int	get_symbol (RangeCoder c, uint8_t state, int is_signed)
static void	update_vlc_state (VlcState *const state, const int v)
static void	put_vlc_symbol (PutBitContext pb, VlcState const state, int v, int bits)
static int	get_vlc_symbol (GetBitContext gb, VlcState const state, int bits)
static int	encode_line (FFV1Context s, int w, int_fast16_t sample[2], int plane_index, int bits)
static void	encode_plane (FFV1Context s, uint8_t src, int w, int h, int stride, int plane_index)
static void	encode_rgb_frame (FFV1Context s, uint32_t src, int w, int h, int stride)
static void	write_quant_table (RangeCoder c, int16_t quant_table)
static void	write_header (FFV1Context *f)
static int	common_init (AVCodecContext *avctx)
static int	encode_init (AVCodecContext *avctx)
static void	clear_state (FFV1Context *f)
static int	encode_frame (AVCodecContext avctx, unsigned char buf, int buf_size, void *data)
static void	common_end (FFV1Context *s)
static int	encode_end (AVCodecContext *avctx)
static void	decode_line (FFV1Context s, int w, int_fast16_t sample[2], int plane_index, int bits)
static void	decode_plane (FFV1Context s, uint8_t src, int w, int h, int stride, int plane_index)
static void	decode_rgb_frame (FFV1Context s, uint32_t src, int w, int h, int stride)
static int	read_quant_table (RangeCoder c, int16_t quant_table, int scale)
static int	read_header (FFV1Context *f)
static int	decode_init (AVCodecContext *avctx)
static int	decode_frame (AVCodecContext avctx, void data, int data_size, uint8_t buf, int buf_size)
Variables
static const int8_t	quant3 [256]
static const int8_t	quant5 [256]
static const int8_t	quant7 [256]
static const int8_t	quant9 [256]
static const int8_t	quant11 [256]
static const int8_t	quant13 [256]
static const uint8_t	log2_run [32]
AVCodec	ffv1_decoder