| /* |
| * Electronic Arts TQI Video Decoder |
| * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Electronic Arts TQI Video Decoder |
| * @author Peter Ross <pross@xvid.org> |
| * @see http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TQI |
| */ |
| |
| #include "avcodec.h" |
| #include "blockdsp.h" |
| #include "bswapdsp.h" |
| #include "get_bits.h" |
| #include "aandcttab.h" |
| #include "eaidct.h" |
| #include "idctdsp.h" |
| #include "internal.h" |
| #include "mpeg12.h" |
| #include "mpegvideo.h" |
| |
| typedef struct TqiContext { |
| MpegEncContext s; |
| BswapDSPContext bsdsp; |
| void *bitstream_buf; |
| unsigned int bitstream_buf_size; |
| DECLARE_ALIGNED(16, int16_t, block)[6][64]; |
| } TqiContext; |
| |
| static av_cold int tqi_decode_init(AVCodecContext *avctx) |
| { |
| TqiContext *t = avctx->priv_data; |
| MpegEncContext *s = &t->s; |
| s->avctx = avctx; |
| ff_blockdsp_init(&s->bdsp, avctx); |
| ff_bswapdsp_init(&t->bsdsp); |
| ff_idctdsp_init(&s->idsp, avctx); |
| ff_init_scantable_permutation(s->idsp.idct_permutation, FF_IDCT_PERM_NONE); |
| ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); |
| s->qscale = 1; |
| avctx->framerate = (AVRational){ 15, 1 }; |
| avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| ff_mpeg12_init_vlcs(); |
| return 0; |
| } |
| |
| static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64]) |
| { |
| int n; |
| s->bdsp.clear_blocks(block[0]); |
| for (n=0; n<6; n++) |
| if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64]) |
| { |
| MpegEncContext *s = &t->s; |
| int linesize = frame->linesize[0]; |
| uint8_t *dest_y = frame->data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16; |
| uint8_t *dest_cb = frame->data[1] + (s->mb_y * 8 * frame->linesize[1]) + s->mb_x * 8; |
| uint8_t *dest_cr = frame->data[2] + (s->mb_y * 8 * frame->linesize[2]) + s->mb_x * 8; |
| |
| ff_ea_idct_put_c(dest_y , linesize, block[0]); |
| ff_ea_idct_put_c(dest_y + 8, linesize, block[1]); |
| ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]); |
| ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]); |
| if(!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) { |
| ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]); |
| ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]); |
| } |
| } |
| |
| static void tqi_calculate_qtable(MpegEncContext *s, int quant) |
| { |
| const int qscale = (215 - 2*quant)*5; |
| int i; |
| s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0])>>11; |
| for(i=1; i<64; i++) |
| s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14; |
| } |
| |
| static int tqi_decode_frame(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| const uint8_t *buf_end = buf+buf_size; |
| TqiContext *t = avctx->priv_data; |
| MpegEncContext *s = &t->s; |
| AVFrame *frame = data; |
| int ret; |
| |
| s->width = AV_RL16(&buf[0]); |
| s->height = AV_RL16(&buf[2]); |
| tqi_calculate_qtable(s, buf[4]); |
| buf += 8; |
| |
| ret = ff_set_dimensions(s->avctx, s->width, s->height); |
| if (ret < 0) |
| return ret; |
| |
| if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| return ret; |
| |
| av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size, |
| buf_end - buf); |
| if (!t->bitstream_buf) |
| return AVERROR(ENOMEM); |
| t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf, |
| (buf_end - buf) / 4); |
| init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf)); |
| |
| s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0; |
| for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++) |
| for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++) |
| { |
| if (tqi_decode_mb(s, t->block) < 0) |
| goto end; |
| tqi_idct_put(t, frame, t->block); |
| } |
| end: |
| |
| *got_frame = 1; |
| return buf_size; |
| } |
| |
| static av_cold int tqi_decode_end(AVCodecContext *avctx) |
| { |
| TqiContext *t = avctx->priv_data; |
| av_freep(&t->bitstream_buf); |
| return 0; |
| } |
| |
| AVCodec ff_eatqi_decoder = { |
| .name = "eatqi", |
| .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_TQI, |
| .priv_data_size = sizeof(TqiContext), |
| .init = tqi_decode_init, |
| .close = tqi_decode_end, |
| .decode = tqi_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |