ffmpeg-2.1.1: move directory
git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
221
contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/ffv1.h
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contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/ffv1.h
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/*
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* FFV1 codec for libavcodec
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*
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* Copyright (c) 2003-2012 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_FFV1_H
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#define AVCODEC_FFV1_H
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/**
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* @file
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* FF Video Codec 1 (a lossless codec)
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/crc.h"
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/timer.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "mathops.h"
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#include "put_bits.h"
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#include "rangecoder.h"
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#include "thread.h"
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#ifdef __INTEL_COMPILER
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#undef av_flatten
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#define av_flatten
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#endif
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#define MAX_PLANES 4
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#define CONTEXT_SIZE 32
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#define MAX_QUANT_TABLES 8
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#define MAX_CONTEXT_INPUTS 5
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extern const uint8_t ff_log2_run[41];
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typedef struct VlcState {
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int16_t drift;
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uint16_t error_sum;
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int8_t bias;
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uint8_t count;
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} VlcState;
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typedef struct PlaneContext {
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int16_t quant_table[MAX_CONTEXT_INPUTS][256];
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int quant_table_index;
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int context_count;
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uint8_t (*state)[CONTEXT_SIZE];
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VlcState *vlc_state;
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uint8_t interlace_bit_state[2];
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} PlaneContext;
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#define MAX_SLICES 256
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typedef struct FFV1Context {
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AVClass *class;
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AVCodecContext *avctx;
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RangeCoder c;
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GetBitContext gb;
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PutBitContext pb;
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uint64_t rc_stat[256][2];
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uint64_t (*rc_stat2[MAX_QUANT_TABLES])[32][2];
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int version;
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int micro_version;
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int width, height;
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int chroma_planes;
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int chroma_h_shift, chroma_v_shift;
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int transparency;
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int flags;
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int picture_number;
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ThreadFrame picture, last_picture;
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struct FFV1Context *fsrc;
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AVFrame *cur;
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int plane_count;
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int ac; ///< 1=range coder <-> 0=golomb rice
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int ac_byte_count; ///< number of bytes used for AC coding
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PlaneContext plane[MAX_PLANES];
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int16_t quant_table[MAX_CONTEXT_INPUTS][256];
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int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256];
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int context_count[MAX_QUANT_TABLES];
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uint8_t state_transition[256];
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uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
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int run_index;
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int colorspace;
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int16_t *sample_buffer;
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int ec;
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int intra;
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int slice_damaged;
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int key_frame_ok;
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int bits_per_raw_sample;
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int packed_at_lsb;
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int gob_count;
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int quant_table_count;
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DSPContext dsp;
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struct FFV1Context *slice_context[MAX_SLICES];
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int slice_count;
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int num_v_slices;
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int num_h_slices;
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int slice_width;
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int slice_height;
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int slice_x;
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int slice_y;
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int slice_reset_contexts;
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int slice_coding_mode;
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} FFV1Context;
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int ffv1_common_init(AVCodecContext *avctx);
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int ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs);
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int ffv1_init_slices_state(FFV1Context *f);
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int ffv1_init_slice_contexts(FFV1Context *f);
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int ffv1_allocate_initial_states(FFV1Context *f);
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void ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs);
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int ffv1_close(AVCodecContext *avctx);
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static av_always_inline int fold(int diff, int bits)
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{
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if (bits == 8)
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diff = (int8_t)diff;
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else {
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diff += 1 << (bits - 1);
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diff &= (1 << bits) - 1;
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diff -= 1 << (bits - 1);
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}
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return diff;
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}
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static inline int predict(int16_t *src, int16_t *last)
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{
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const int LT = last[-1];
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const int T = last[0];
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const int L = src[-1];
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return mid_pred(L, L + T - LT, T);
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}
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static inline int get_context(PlaneContext *p, int16_t *src,
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int16_t *last, int16_t *last2)
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{
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const int LT = last[-1];
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const int T = last[0];
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const int RT = last[1];
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const int L = src[-1];
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if (p->quant_table[3][127]) {
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const int TT = last2[0];
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const int LL = src[-2];
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return p->quant_table[0][(L - LT) & 0xFF] +
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p->quant_table[1][(LT - T) & 0xFF] +
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p->quant_table[2][(T - RT) & 0xFF] +
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p->quant_table[3][(LL - L) & 0xFF] +
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p->quant_table[4][(TT - T) & 0xFF];
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} else
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return p->quant_table[0][(L - LT) & 0xFF] +
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p->quant_table[1][(LT - T) & 0xFF] +
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p->quant_table[2][(T - RT) & 0xFF];
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}
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static inline void update_vlc_state(VlcState *const state, const int v)
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{
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int drift = state->drift;
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int count = state->count;
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state->error_sum += FFABS(v);
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drift += v;
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if (count == 128) { // FIXME: variable
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count >>= 1;
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drift >>= 1;
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state->error_sum >>= 1;
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}
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count++;
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if (drift <= -count) {
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if (state->bias > -128)
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state->bias--;
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drift += count;
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if (drift <= -count)
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drift = -count + 1;
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} else if (drift > 0) {
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if (state->bias < 127)
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state->bias++;
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drift -= count;
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if (drift > 0)
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drift = 0;
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}
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state->drift = drift;
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state->count = count;
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}
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#endif /* AVCODEC_FFV1_H */
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