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 "avcodec.h" 30#include "blockdsp.h" 31#include "bswapdsp.h" 32#include "get_bits.h" 33#include "aandcttab.h" 34#include "eaidct.h" 35#include "idctdsp.h" 36#include "internal.h" 37#include "mpeg12.h" 38#include "mpegvideo.h" 39 40typedef struct TqiContext { 41 MpegEncContext s; 42 BswapDSPContext bsdsp; 43 void *bitstream_buf; 44 unsigned int bitstream_buf_size; 45 DECLARE_ALIGNED(16, int16_t, block)[6][64]; 46} TqiContext; 47 48static av_cold int tqi_decode_init(AVCodecContext *avctx) 49{ 50 TqiContext *t = avctx->priv_data; 51 MpegEncContext *s = &t->s; 52 s->avctx = avctx; 53 ff_blockdsp_init(&s->bdsp, avctx); 54 ff_bswapdsp_init(&t->bsdsp); 55 ff_idctdsp_init(&s->idsp, avctx); 56 ff_init_scantable_permutation(s->idsp.idct_permutation, FF_NO_IDCT_PERM); 57 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); 58 s->qscale = 1; 59 avctx->time_base = (AVRational){1, 15}; 60 avctx->pix_fmt = AV_PIX_FMT_YUV420P; 61 ff_mpeg12_init_vlcs(); 62 return 0; 63} 64 65static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64]) 66{ 67 int n; 68 s->bdsp.clear_blocks(block[0]); 69 for (n=0; n<6; n++) 70 if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0) 71 return -1; 72 73 return 0; 74} 75 76static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64]) 77{ 78 MpegEncContext *s = &t->s; 79 int linesize = frame->linesize[0]; 80 uint8_t *dest_y = frame->data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16; 81 uint8_t *dest_cb = frame->data[1] + (s->mb_y * 8 * frame->linesize[1]) + s->mb_x * 8; 82 uint8_t *dest_cr = frame->data[2] + (s->mb_y * 8 * frame->linesize[2]) + s->mb_x * 8; 83 84 ff_ea_idct_put_c(dest_y , linesize, block[0]); 85 ff_ea_idct_put_c(dest_y + 8, linesize, block[1]); 86 ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]); 87 ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]); 88 if(!(s->avctx->flags&CODEC_FLAG_GRAY)) { 89 ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]); 90 ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]); 91 } 92} 93 94static void tqi_calculate_qtable(MpegEncContext *s, int quant) 95{ 96 const int qscale = (215 - 2*quant)*5; 97 int i; 98 s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0])>>11; 99 for(i=1; i<64; i++) 100 s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14; 101} 102 103static int tqi_decode_frame(AVCodecContext *avctx, 104 void *data, int *got_frame, 105 AVPacket *avpkt) 106{ 107 const uint8_t *buf = avpkt->data; 108 int buf_size = avpkt->size; 109 const uint8_t *buf_end = buf+buf_size; 110 TqiContext *t = avctx->priv_data; 111 MpegEncContext *s = &t->s; 112 AVFrame *frame = data; 113 int ret; 114 115 s->width = AV_RL16(&buf[0]); 116 s->height = AV_RL16(&buf[2]); 117 tqi_calculate_qtable(s, buf[4]); 118 buf += 8; 119 120 ret = ff_set_dimensions(s->avctx, s->width, s->height); 121 if (ret < 0) 122 return ret; 123 124 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) 125 return ret; 126 127 av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size, 128 buf_end - buf); 129 if (!t->bitstream_buf) 130 return AVERROR(ENOMEM); 131 t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf, 132 (buf_end - buf) / 4); 133 init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf)); 134 135 s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0; 136 for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++) 137 for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++) 138 { 139 if (tqi_decode_mb(s, t->block) < 0) 140 goto end; 141 tqi_idct_put(t, frame, t->block); 142 } 143 end: 144 145 *got_frame = 1; 146 return buf_size; 147} 148 149static av_cold int tqi_decode_end(AVCodecContext *avctx) 150{ 151 TqiContext *t = avctx->priv_data; 152 av_free(t->bitstream_buf); 153 return 0; 154} 155 156AVCodec ff_eatqi_decoder = { 157 .name = "eatqi", 158 .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"), 159 .type = AVMEDIA_TYPE_VIDEO, 160 .id = AV_CODEC_ID_TQI, 161 .priv_data_size = sizeof(TqiContext), 162 .init = tqi_decode_init, 163 .close = tqi_decode_end, 164 .decode = tqi_decode_frame, 165 .capabilities = CODEC_CAP_DR1, 166}; 167