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850 lines
27 KiB
C
850 lines
27 KiB
C
/*
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* SVQ1 decoder
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* ported to MPlayer by Arpi <arpi@thot.banki.hu>
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* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
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*
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* Copyright (c) 2002 The Xine Project
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* Copyright (c) 2002 The FFmpeg Project
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*
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* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
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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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/**
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* @file
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* Sorenson Vector Quantizer #1 (SVQ1) video codec.
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* For more information of the SVQ1 algorithm, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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#include "avcodec.h"
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#include "get_bits.h"
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#include "h263.h"
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#include "hpeldsp.h"
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#include "internal.h"
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#include "mathops.h"
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#include "svq1.h"
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static VLC svq1_block_type;
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static VLC svq1_motion_component;
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static VLC svq1_intra_multistage[6];
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static VLC svq1_inter_multistage[6];
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static VLC svq1_intra_mean;
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static VLC svq1_inter_mean;
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/* motion vector (prediction) */
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typedef struct svq1_pmv_s {
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int x;
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int y;
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} svq1_pmv;
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typedef struct SVQ1Context {
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HpelDSPContext hdsp;
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GetBitContext gb;
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AVFrame *prev;
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uint8_t *pkt_swapped;
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int pkt_swapped_allocated;
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int width;
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int height;
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int frame_code;
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int nonref; // 1 if the current frame won't be referenced
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} SVQ1Context;
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static const uint8_t string_table[256] = {
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0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54,
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0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,
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0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06,
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0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,
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0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0,
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0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,
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0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2,
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0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,
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0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9,
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0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,
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0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B,
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0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,
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0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D,
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0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,
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0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F,
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0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,
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0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB,
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0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,
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0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9,
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0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,
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0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F,
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0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,
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0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D,
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0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,
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0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26,
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0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,
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0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74,
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0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,
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0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82,
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0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,
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0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0,
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0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9
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};
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#define SVQ1_PROCESS_VECTOR() \
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for (; level > 0; i++) { \
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/* process next depth */ \
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if (i == m) { \
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m = n; \
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if (--level == 0) \
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break; \
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} \
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/* divide block if next bit set */ \
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if (!get_bits1(bitbuf)) \
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break; \
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/* add child nodes */ \
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list[n++] = list[i]; \
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list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level >> 1) + 1));\
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}
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#define SVQ1_ADD_CODEBOOK() \
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/* add codebook entries to vector */ \
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for (j = 0; j < stages; j++) { \
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n3 = codebook[entries[j]] ^ 0x80808080; \
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n1 += (n3 & 0xFF00FF00) >> 8; \
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n2 += n3 & 0x00FF00FF; \
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} \
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\
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/* clip to [0..255] */ \
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if (n1 & 0xFF00FF00) { \
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n3 = (n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
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n1 += 0x7F007F00; \
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n1 |= (~n1 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
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n1 &= n3 & 0x00FF00FF; \
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} \
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\
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if (n2 & 0xFF00FF00) { \
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n3 = (n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
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n2 += 0x7F007F00; \
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n2 |= (~n2 >> 15 & 0x00010001 | 0x01000100) - 0x00010001; \
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n2 &= n3 & 0x00FF00FF; \
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}
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#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook) \
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codebook = (const uint32_t *)cbook[level]; \
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if (stages > 0) \
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bit_cache = get_bits(bitbuf, 4 * stages); \
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/* calculate codebook entries for this vector */ \
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for (j = 0; j < stages; j++) { \
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entries[j] = (((bit_cache >> (4 * (stages - j - 1))) & 0xF) + \
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16 * j) << (level + 1); \
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} \
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mean -= stages * 128; \
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n4 = (mean << 16) + mean;
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static int svq1_decode_block_intra(GetBitContext *bitbuf, uint8_t *pixels,
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int pitch)
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{
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uint32_t bit_cache;
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uint8_t *list[63];
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uint32_t *dst;
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const uint32_t *codebook;
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int entries[6];
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int i, j, m, n;
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int stages;
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unsigned mean;
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unsigned x, y, width, height, level;
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uint32_t n1, n2, n3, n4;
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/* initialize list for breadth first processing of vectors */
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list[0] = pixels;
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/* recursively process vector */
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for (i = 0, m = 1, n = 1, level = 5; i < n; i++) {
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SVQ1_PROCESS_VECTOR();
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/* destination address and vector size */
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dst = (uint32_t *)list[i];
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width = 1 << ((4 + level) / 2);
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height = 1 << ((3 + level) / 2);
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/* get number of stages (-1 skips vector, 0 for mean only) */
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stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;
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if (stages == -1) {
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for (y = 0; y < height; y++)
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memset(&dst[y * (pitch / 4)], 0, width);
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continue; /* skip vector */
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}
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if ((stages > 0 && level >= 4)) {
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ff_dlog(NULL,
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"Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",
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stages, level);
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return AVERROR_INVALIDDATA; /* invalid vector */
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}
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av_assert0(stages >= 0);
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mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);
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if (stages == 0) {
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for (y = 0; y < height; y++)
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memset(&dst[y * (pitch / 4)], mean, width);
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} else {
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SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks);
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for (y = 0; y < height; y++) {
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for (x = 0; x < width / 4; x++, codebook++) {
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n1 = n4;
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n2 = n4;
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SVQ1_ADD_CODEBOOK()
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/* store result */
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dst[x] = n1 << 8 | n2;
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}
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dst += pitch / 4;
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}
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}
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}
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return 0;
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}
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static int svq1_decode_block_non_intra(GetBitContext *bitbuf, uint8_t *pixels,
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int pitch)
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{
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uint32_t bit_cache;
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uint8_t *list[63];
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uint32_t *dst;
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const uint32_t *codebook;
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int entries[6];
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int i, j, m, n;
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int stages;
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unsigned mean;
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int x, y, width, height, level;
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uint32_t n1, n2, n3, n4;
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/* initialize list for breadth first processing of vectors */
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list[0] = pixels;
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/* recursively process vector */
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for (i = 0, m = 1, n = 1, level = 5; i < n; i++) {
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SVQ1_PROCESS_VECTOR();
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/* destination address and vector size */
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dst = (uint32_t *)list[i];
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width = 1 << ((4 + level) / 2);
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height = 1 << ((3 + level) / 2);
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/* get number of stages (-1 skips vector, 0 for mean only) */
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stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;
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if (stages == -1)
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continue; /* skip vector */
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if ((stages > 0 && level >= 4)) {
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ff_dlog(NULL,
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"Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",
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stages, level);
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return AVERROR_INVALIDDATA; /* invalid vector */
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}
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av_assert0(stages >= 0);
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mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;
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SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
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for (y = 0; y < height; y++) {
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for (x = 0; x < width / 4; x++, codebook++) {
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n3 = dst[x];
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/* add mean value to vector */
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n1 = n4 + ((n3 & 0xFF00FF00) >> 8);
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n2 = n4 + (n3 & 0x00FF00FF);
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SVQ1_ADD_CODEBOOK()
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/* store result */
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dst[x] = n1 << 8 | n2;
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}
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dst += pitch / 4;
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}
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}
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return 0;
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}
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static int svq1_decode_motion_vector(GetBitContext *bitbuf, svq1_pmv *mv,
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svq1_pmv **pmv)
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{
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int diff;
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int i;
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for (i = 0; i < 2; i++) {
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/* get motion code */
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diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
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if (diff < 0)
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return AVERROR_INVALIDDATA;
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else if (diff) {
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if (get_bits1(bitbuf))
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diff = -diff;
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}
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/* add median of motion vector predictors and clip result */
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if (i == 1)
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mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6);
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else
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mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6);
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}
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return 0;
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}
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static void svq1_skip_block(uint8_t *current, uint8_t *previous,
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int pitch, int x, int y)
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{
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uint8_t *src;
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uint8_t *dst;
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int i;
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src = &previous[x + y * pitch];
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dst = current;
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for (i = 0; i < 16; i++) {
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memcpy(dst, src, 16);
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src += pitch;
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dst += pitch;
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}
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}
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static int svq1_motion_inter_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
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uint8_t *current, uint8_t *previous,
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int pitch, svq1_pmv *motion, int x, int y,
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int width, int height)
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{
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uint8_t *src;
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uint8_t *dst;
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svq1_pmv mv;
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svq1_pmv *pmv[3];
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int result;
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/* predict and decode motion vector */
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pmv[0] = &motion[0];
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if (y == 0) {
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pmv[1] =
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pmv[2] = pmv[0];
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} else {
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pmv[1] = &motion[x / 8 + 2];
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pmv[2] = &motion[x / 8 + 4];
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}
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result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
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if (result)
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return result;
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motion[0].x =
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motion[x / 8 + 2].x =
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motion[x / 8 + 3].x = mv.x;
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motion[0].y =
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motion[x / 8 + 2].y =
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motion[x / 8 + 3].y = mv.y;
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mv.x = av_clip(mv.x, -2 * x, 2 * (width - x - 16));
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mv.y = av_clip(mv.y, -2 * y, 2 * (height - y - 16));
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src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1)) * pitch];
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dst = current;
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hdsp->put_pixels_tab[0][(mv.y & 1) << 1 | (mv.x & 1)](dst, src, pitch, 16);
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return 0;
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}
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static int svq1_motion_inter_4v_block(HpelDSPContext *hdsp, GetBitContext *bitbuf,
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uint8_t *current, uint8_t *previous,
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int pitch, svq1_pmv *motion, int x, int y,
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int width, int height)
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{
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uint8_t *src;
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uint8_t *dst;
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svq1_pmv mv;
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svq1_pmv *pmv[4];
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int i, result;
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/* predict and decode motion vector (0) */
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pmv[0] = &motion[0];
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if (y == 0) {
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pmv[1] =
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pmv[2] = pmv[0];
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} else {
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pmv[1] = &motion[(x / 8) + 2];
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pmv[2] = &motion[(x / 8) + 4];
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}
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result = svq1_decode_motion_vector(bitbuf, &mv, pmv);
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if (result)
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return result;
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/* predict and decode motion vector (1) */
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pmv[0] = &mv;
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if (y == 0) {
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pmv[1] =
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pmv[2] = pmv[0];
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} else {
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pmv[1] = &motion[(x / 8) + 3];
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}
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result = svq1_decode_motion_vector(bitbuf, &motion[0], pmv);
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if (result)
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return result;
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/* predict and decode motion vector (2) */
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pmv[1] = &motion[0];
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pmv[2] = &motion[(x / 8) + 1];
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result = svq1_decode_motion_vector(bitbuf, &motion[(x / 8) + 2], pmv);
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if (result)
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return result;
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/* predict and decode motion vector (3) */
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pmv[2] = &motion[(x / 8) + 2];
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pmv[3] = &motion[(x / 8) + 3];
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result = svq1_decode_motion_vector(bitbuf, pmv[3], pmv);
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if (result)
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return result;
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/* form predictions */
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for (i = 0; i < 4; i++) {
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int mvx = pmv[i]->x + (i & 1) * 16;
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int mvy = pmv[i]->y + (i >> 1) * 16;
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// FIXME: clipping or padding?
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mvx = av_clip(mvx, -2 * x, 2 * (width - x - 8));
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mvy = av_clip(mvy, -2 * y, 2 * (height - y - 8));
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src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1)) * pitch];
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dst = current;
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hdsp->put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst, src, pitch, 8);
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/* select next block */
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if (i & 1)
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current += 8 * (pitch - 1);
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else
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current += 8;
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}
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return 0;
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}
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static int svq1_decode_delta_block(AVCodecContext *avctx, HpelDSPContext *hdsp,
|
|
GetBitContext *bitbuf,
|
|
uint8_t *current, uint8_t *previous,
|
|
int pitch, svq1_pmv *motion, int x, int y,
|
|
int width, int height)
|
|
{
|
|
uint32_t block_type;
|
|
int result = 0;
|
|
|
|
/* get block type */
|
|
block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);
|
|
|
|
/* reset motion vectors */
|
|
if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
|
|
motion[0].x =
|
|
motion[0].y =
|
|
motion[x / 8 + 2].x =
|
|
motion[x / 8 + 2].y =
|
|
motion[x / 8 + 3].x =
|
|
motion[x / 8 + 3].y = 0;
|
|
}
|
|
|
|
switch (block_type) {
|
|
case SVQ1_BLOCK_SKIP:
|
|
svq1_skip_block(current, previous, pitch, x, y);
|
|
break;
|
|
|
|
case SVQ1_BLOCK_INTER:
|
|
result = svq1_motion_inter_block(hdsp, bitbuf, current, previous,
|
|
pitch, motion, x, y, width, height);
|
|
|
|
if (result != 0) {
|
|
ff_dlog(avctx, "Error in svq1_motion_inter_block %i\n", result);
|
|
break;
|
|
}
|
|
result = svq1_decode_block_non_intra(bitbuf, current, pitch);
|
|
break;
|
|
|
|
case SVQ1_BLOCK_INTER_4V:
|
|
result = svq1_motion_inter_4v_block(hdsp, bitbuf, current, previous,
|
|
pitch, motion, x, y, width, height);
|
|
|
|
if (result != 0) {
|
|
ff_dlog(avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
|
|
break;
|
|
}
|
|
result = svq1_decode_block_non_intra(bitbuf, current, pitch);
|
|
break;
|
|
|
|
case SVQ1_BLOCK_INTRA:
|
|
result = svq1_decode_block_intra(bitbuf, current, pitch);
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static void svq1_parse_string(GetBitContext *bitbuf, uint8_t out[257])
|
|
{
|
|
uint8_t seed;
|
|
int i;
|
|
|
|
out[0] = get_bits(bitbuf, 8);
|
|
seed = string_table[out[0]];
|
|
|
|
for (i = 1; i <= out[0]; i++) {
|
|
out[i] = get_bits(bitbuf, 8) ^ seed;
|
|
seed = string_table[out[i] ^ seed];
|
|
}
|
|
out[i] = 0;
|
|
}
|
|
|
|
static int svq1_decode_frame_header(AVCodecContext *avctx, AVFrame *frame)
|
|
{
|
|
SVQ1Context *s = avctx->priv_data;
|
|
GetBitContext *bitbuf = &s->gb;
|
|
int frame_size_code;
|
|
int width = s->width;
|
|
int height = s->height;
|
|
|
|
skip_bits(bitbuf, 8); /* temporal_reference */
|
|
|
|
/* frame type */
|
|
s->nonref = 0;
|
|
switch (get_bits(bitbuf, 2)) {
|
|
case 0:
|
|
frame->pict_type = AV_PICTURE_TYPE_I;
|
|
break;
|
|
case 2:
|
|
s->nonref = 1;
|
|
case 1:
|
|
frame->pict_type = AV_PICTURE_TYPE_P;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid frame type.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (frame->pict_type == AV_PICTURE_TYPE_I) {
|
|
/* unknown fields */
|
|
if (s->frame_code == 0x50 || s->frame_code == 0x60) {
|
|
int csum = get_bits(bitbuf, 16);
|
|
|
|
csum = ff_svq1_packet_checksum(bitbuf->buffer,
|
|
bitbuf->size_in_bits >> 3,
|
|
csum);
|
|
|
|
ff_dlog(avctx, "%s checksum (%02x) for packet data\n",
|
|
(csum == 0) ? "correct" : "incorrect", csum);
|
|
}
|
|
|
|
if ((s->frame_code ^ 0x10) >= 0x50) {
|
|
uint8_t msg[257];
|
|
|
|
svq1_parse_string(bitbuf, msg);
|
|
|
|
av_log(avctx, AV_LOG_INFO,
|
|
"embedded message:\n%s\n", ((char *)msg) + 1);
|
|
}
|
|
|
|
skip_bits(bitbuf, 2);
|
|
skip_bits(bitbuf, 2);
|
|
skip_bits1(bitbuf);
|
|
|
|
/* load frame size */
|
|
frame_size_code = get_bits(bitbuf, 3);
|
|
|
|
if (frame_size_code == 7) {
|
|
/* load width, height (12 bits each) */
|
|
width = get_bits(bitbuf, 12);
|
|
height = get_bits(bitbuf, 12);
|
|
|
|
if (!width || !height)
|
|
return AVERROR_INVALIDDATA;
|
|
} else {
|
|
/* get width, height from table */
|
|
width = ff_svq1_frame_size_table[frame_size_code][0];
|
|
height = ff_svq1_frame_size_table[frame_size_code][1];
|
|
}
|
|
}
|
|
|
|
/* unknown fields */
|
|
if (get_bits1(bitbuf)) {
|
|
skip_bits1(bitbuf); /* use packet checksum if (1) */
|
|
skip_bits1(bitbuf); /* component checksums after image data if (1) */
|
|
|
|
if (get_bits(bitbuf, 2) != 0)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (get_bits1(bitbuf)) {
|
|
skip_bits1(bitbuf);
|
|
skip_bits(bitbuf, 4);
|
|
skip_bits1(bitbuf);
|
|
skip_bits(bitbuf, 2);
|
|
|
|
if (skip_1stop_8data_bits(bitbuf) < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
s->width = width;
|
|
s->height = height;
|
|
return 0;
|
|
}
|
|
|
|
static int svq1_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
SVQ1Context *s = avctx->priv_data;
|
|
AVFrame *cur = data;
|
|
uint8_t *current;
|
|
int result, i, x, y, width, height;
|
|
svq1_pmv *pmv;
|
|
int ret;
|
|
|
|
/* initialize bit buffer */
|
|
ret = init_get_bits8(&s->gb, buf, buf_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* decode frame header */
|
|
s->frame_code = get_bits(&s->gb, 22);
|
|
|
|
if ((s->frame_code & ~0x70) || !(s->frame_code & 0x60))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* swap some header bytes (why?) */
|
|
if (s->frame_code != 0x20) {
|
|
uint32_t *src;
|
|
|
|
if (buf_size < 9 * 4) {
|
|
av_log(avctx, AV_LOG_ERROR, "Input packet too small\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
av_fast_padded_malloc(&s->pkt_swapped,
|
|
&s->pkt_swapped_allocated,
|
|
buf_size);
|
|
if (!s->pkt_swapped)
|
|
return AVERROR(ENOMEM);
|
|
|
|
memcpy(s->pkt_swapped, buf, buf_size);
|
|
buf = s->pkt_swapped;
|
|
init_get_bits(&s->gb, buf, buf_size * 8);
|
|
skip_bits(&s->gb, 22);
|
|
|
|
src = (uint32_t *)(s->pkt_swapped + 4);
|
|
|
|
for (i = 0; i < 4; i++)
|
|
src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
|
|
}
|
|
|
|
result = svq1_decode_frame_header(avctx, cur);
|
|
if (result != 0) {
|
|
ff_dlog(avctx, "Error in svq1_decode_frame_header %i\n", result);
|
|
return result;
|
|
}
|
|
|
|
result = ff_set_dimensions(avctx, s->width, s->height);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
if ((avctx->skip_frame >= AVDISCARD_NONREF && s->nonref) ||
|
|
(avctx->skip_frame >= AVDISCARD_NONKEY &&
|
|
cur->pict_type != AV_PICTURE_TYPE_I) ||
|
|
avctx->skip_frame >= AVDISCARD_ALL)
|
|
return buf_size;
|
|
|
|
result = ff_get_buffer(avctx, cur, s->nonref ? 0 : AV_GET_BUFFER_FLAG_REF);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
pmv = av_malloc((FFALIGN(s->width, 16) / 8 + 3) * sizeof(*pmv));
|
|
if (!pmv)
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* decode y, u and v components */
|
|
for (i = 0; i < 3; i++) {
|
|
int linesize = cur->linesize[i];
|
|
if (i == 0) {
|
|
width = FFALIGN(s->width, 16);
|
|
height = FFALIGN(s->height, 16);
|
|
} else {
|
|
if (avctx->flags & AV_CODEC_FLAG_GRAY)
|
|
break;
|
|
width = FFALIGN(s->width / 4, 16);
|
|
height = FFALIGN(s->height / 4, 16);
|
|
}
|
|
|
|
current = cur->data[i];
|
|
|
|
if (cur->pict_type == AV_PICTURE_TYPE_I) {
|
|
/* keyframe */
|
|
for (y = 0; y < height; y += 16) {
|
|
for (x = 0; x < width; x += 16) {
|
|
result = svq1_decode_block_intra(&s->gb, ¤t[x],
|
|
linesize);
|
|
if (result) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Error in svq1_decode_block %i (keyframe)\n",
|
|
result);
|
|
goto err;
|
|
}
|
|
}
|
|
current += 16 * linesize;
|
|
}
|
|
} else {
|
|
/* delta frame */
|
|
uint8_t *previous = s->prev->data[i];
|
|
if (!previous ||
|
|
s->prev->width != s->width || s->prev->height != s->height) {
|
|
av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");
|
|
result = AVERROR_INVALIDDATA;
|
|
goto err;
|
|
}
|
|
|
|
memset(pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
|
|
|
|
for (y = 0; y < height; y += 16) {
|
|
for (x = 0; x < width; x += 16) {
|
|
result = svq1_decode_delta_block(avctx, &s->hdsp,
|
|
&s->gb, ¤t[x],
|
|
previous, linesize,
|
|
pmv, x, y, width, height);
|
|
if (result != 0) {
|
|
ff_dlog(avctx,
|
|
"Error in svq1_decode_delta_block %i\n",
|
|
result);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
pmv[0].x =
|
|
pmv[0].y = 0;
|
|
|
|
current += 16 * linesize;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!s->nonref) {
|
|
av_frame_unref(s->prev);
|
|
result = av_frame_ref(s->prev, cur);
|
|
if (result < 0)
|
|
goto err;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
result = buf_size;
|
|
|
|
err:
|
|
av_free(pmv);
|
|
return result;
|
|
}
|
|
|
|
static av_cold int svq1_decode_init(AVCodecContext *avctx)
|
|
{
|
|
SVQ1Context *s = avctx->priv_data;
|
|
int i;
|
|
int offset = 0;
|
|
|
|
s->prev = av_frame_alloc();
|
|
if (!s->prev)
|
|
return AVERROR(ENOMEM);
|
|
|
|
s->width = avctx->width + 3 & ~3;
|
|
s->height = avctx->height + 3 & ~3;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV410P;
|
|
|
|
ff_hpeldsp_init(&s->hdsp, avctx->flags);
|
|
|
|
INIT_VLC_STATIC(&svq1_block_type, 2, 4,
|
|
&ff_svq1_block_type_vlc[0][1], 2, 1,
|
|
&ff_svq1_block_type_vlc[0][0], 2, 1, 6);
|
|
|
|
INIT_VLC_STATIC(&svq1_motion_component, 7, 33,
|
|
&ff_mvtab[0][1], 2, 1,
|
|
&ff_mvtab[0][0], 2, 1, 176);
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
static const uint8_t sizes[2][6] = { { 14, 10, 14, 18, 16, 18 },
|
|
{ 10, 10, 14, 14, 14, 16 } };
|
|
static VLC_TYPE table[168][2];
|
|
svq1_intra_multistage[i].table = &table[offset];
|
|
svq1_intra_multistage[i].table_allocated = sizes[0][i];
|
|
offset += sizes[0][i];
|
|
init_vlc(&svq1_intra_multistage[i], 3, 8,
|
|
&ff_svq1_intra_multistage_vlc[i][0][1], 2, 1,
|
|
&ff_svq1_intra_multistage_vlc[i][0][0], 2, 1,
|
|
INIT_VLC_USE_NEW_STATIC);
|
|
svq1_inter_multistage[i].table = &table[offset];
|
|
svq1_inter_multistage[i].table_allocated = sizes[1][i];
|
|
offset += sizes[1][i];
|
|
init_vlc(&svq1_inter_multistage[i], 3, 8,
|
|
&ff_svq1_inter_multistage_vlc[i][0][1], 2, 1,
|
|
&ff_svq1_inter_multistage_vlc[i][0][0], 2, 1,
|
|
INIT_VLC_USE_NEW_STATIC);
|
|
}
|
|
|
|
INIT_VLC_STATIC(&svq1_intra_mean, 8, 256,
|
|
&ff_svq1_intra_mean_vlc[0][1], 4, 2,
|
|
&ff_svq1_intra_mean_vlc[0][0], 4, 2, 632);
|
|
|
|
INIT_VLC_STATIC(&svq1_inter_mean, 9, 512,
|
|
&ff_svq1_inter_mean_vlc[0][1], 4, 2,
|
|
&ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int svq1_decode_end(AVCodecContext *avctx)
|
|
{
|
|
SVQ1Context *s = avctx->priv_data;
|
|
|
|
av_frame_free(&s->prev);
|
|
av_freep(&s->pkt_swapped);
|
|
s->pkt_swapped_allocated = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void svq1_flush(AVCodecContext *avctx)
|
|
{
|
|
SVQ1Context *s = avctx->priv_data;
|
|
|
|
av_frame_unref(s->prev);
|
|
}
|
|
|
|
AVCodec ff_svq1_decoder = {
|
|
.name = "svq1",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_SVQ1,
|
|
.priv_data_size = sizeof(SVQ1Context),
|
|
.init = svq1_decode_init,
|
|
.close = svq1_decode_end,
|
|
.decode = svq1_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.flush = svq1_flush,
|
|
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
|
|
AV_PIX_FMT_NONE },
|
|
};
|