1/* 2 * Electronic Arts TQI Video Decoder 3 * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * Electronic Arts TQI Video Decoder 25 * @author Peter Ross <pross@xvid.org> 26 * @see http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TQI 27 */ 28 29#include "libavutil/mem_internal.h" 30 31#include "avcodec.h" 32#include "blockdsp.h" 33#include "bswapdsp.h" 34#include "codec_internal.h" 35#include "get_bits.h" 36#include "aandcttab.h" 37#include "eaidct.h" 38#include "idctdsp.h" 39#include "internal.h" 40#include "mpeg12data.h" 41#include "mpeg12dec.h" 42 43typedef struct TqiContext { 44 AVCodecContext *avctx; 45 GetBitContext gb; 46 BlockDSPContext bdsp; 47 BswapDSPContext bsdsp; 48 IDCTDSPContext idsp; 49 ScanTable intra_scantable; 50 51 void *bitstream_buf; 52 unsigned int bitstream_buf_size; 53 54 int mb_x, mb_y; 55 uint16_t intra_matrix[64]; 56 int last_dc[3]; 57 58 DECLARE_ALIGNED(32, int16_t, block)[6][64]; 59} TqiContext; 60 61static av_cold int tqi_decode_init(AVCodecContext *avctx) 62{ 63 TqiContext *t = avctx->priv_data; 64 65 ff_blockdsp_init(&t->bdsp, avctx); 66 ff_bswapdsp_init(&t->bsdsp); 67 ff_idctdsp_init(&t->idsp, avctx); 68 ff_init_scantable_permutation(t->idsp.idct_permutation, FF_IDCT_PERM_NONE); 69 ff_init_scantable(t->idsp.idct_permutation, &t->intra_scantable, ff_zigzag_direct); 70 71 avctx->framerate = (AVRational){ 15, 1 }; 72 avctx->pix_fmt = AV_PIX_FMT_YUV420P; 73 ff_mpeg12_init_vlcs(); 74 return 0; 75} 76 77static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64]) 78{ 79 int n; 80 81 t->bdsp.clear_blocks(block[0]); 82 for (n = 0; n < 6; n++) { 83 int ret = ff_mpeg1_decode_block_intra(&t->gb, 84 t->intra_matrix, 85 t->intra_scantable.permutated, 86 t->last_dc, block[n], n, 1); 87 if (ret < 0) { 88 av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", 89 t->mb_x, t->mb_y); 90 return ret; 91 } 92 } 93 94 return 0; 95} 96 97static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame, 98 int16_t (*block)[64]) 99{ 100 TqiContext *t = avctx->priv_data; 101 ptrdiff_t linesize = frame->linesize[0]; 102 uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16; 103 uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8; 104 uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->mb_x * 8; 105 106 ff_ea_idct_put_c(dest_y , linesize, block[0]); 107 ff_ea_idct_put_c(dest_y + 8, linesize, block[1]); 108 ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]); 109 ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]); 110 111 if (!(avctx->flags & AV_CODEC_FLAG_GRAY)) { 112 ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]); 113 ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]); 114 } 115} 116 117static void tqi_calculate_qtable(TqiContext *t, int quant) 118{ 119 const int64_t qscale = (215 - 2*quant)*5; 120 int i; 121 122 t->intra_matrix[0] = (ff_inv_aanscales[0] * ff_mpeg1_default_intra_matrix[0]) >> 11; 123 for(i=1; i<64; i++) 124 t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14; 125} 126 127static int tqi_decode_frame(AVCodecContext *avctx, AVFrame *frame, 128 int *got_frame, AVPacket *avpkt) 129{ 130 const uint8_t *buf = avpkt->data; 131 int buf_size = avpkt->size; 132 const uint8_t *buf_end = buf+buf_size; 133 TqiContext *t = avctx->priv_data; 134 int ret, w, h; 135 136 if (buf_size < 12) 137 return AVERROR_INVALIDDATA; 138 139 t->avctx = avctx; 140 141 w = AV_RL16(&buf[0]); 142 h = AV_RL16(&buf[2]); 143 tqi_calculate_qtable(t, buf[4]); 144 buf += 8; 145 146 ret = ff_set_dimensions(avctx, w, h); 147 if (ret < 0) 148 return ret; 149 150 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) 151 return ret; 152 153 av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size, 154 buf_end - buf); 155 if (!t->bitstream_buf) 156 return AVERROR(ENOMEM); 157 t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf, 158 (buf_end - buf) / 4); 159 init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf)); 160 161 t->last_dc[0] = 162 t->last_dc[1] = 163 t->last_dc[2] = 0; 164 for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) { 165 for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) { 166 if (tqi_decode_mb(t, t->block) < 0) 167 goto end; 168 tqi_idct_put(avctx, frame, t->block); 169 } 170 } 171 end: 172 173 *got_frame = 1; 174 return buf_size; 175} 176 177static av_cold int tqi_decode_end(AVCodecContext *avctx) 178{ 179 TqiContext *t = avctx->priv_data; 180 av_freep(&t->bitstream_buf); 181 return 0; 182} 183 184const FFCodec ff_eatqi_decoder = { 185 .p.name = "eatqi", 186 .p.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"), 187 .p.type = AVMEDIA_TYPE_VIDEO, 188 .p.id = AV_CODEC_ID_TQI, 189 .priv_data_size = sizeof(TqiContext), 190 .init = tqi_decode_init, 191 .close = tqi_decode_end, 192 FF_CODEC_DECODE_CB(tqi_decode_frame), 193 .p.capabilities = AV_CODEC_CAP_DR1, 194 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 195}; 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