/* * 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 "libavutil/mem_internal.h" #include "avcodec.h" #include "blockdsp.h" #include "bswapdsp.h" #include "codec_internal.h" #include "decode.h" #include "get_bits.h" #include "aandcttab.h" #include "eaidct.h" #include "mpeg12data.h" #include "mpeg12dec.h" typedef struct TqiContext { AVCodecContext *avctx; GetBitContext gb; BlockDSPContext bdsp; BswapDSPContext bsdsp; void *bitstream_buf; unsigned int bitstream_buf_size; int mb_x, mb_y; uint16_t intra_matrix[64]; int last_dc[3]; DECLARE_ALIGNED(32, int16_t, block)[6][64]; } TqiContext; static av_cold int tqi_decode_init(AVCodecContext *avctx) { TqiContext *t = avctx->priv_data; ff_blockdsp_init(&t->bdsp); ff_bswapdsp_init(&t->bsdsp); avctx->framerate = (AVRational){ 15, 1 }; avctx->pix_fmt = AV_PIX_FMT_YUV420P; ff_mpeg12_init_vlcs(); return 0; } static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64]) { int n; t->bdsp.clear_blocks(block[0]); for (n = 0; n < 6; n++) { int ret = ff_mpeg1_decode_block_intra(&t->gb, t->intra_matrix, ff_zigzag_direct, t->last_dc, block[n], n, 1); if (ret < 0) { av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", t->mb_x, t->mb_y); return ret; } } return 0; } static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame, int16_t (*block)[64]) { TqiContext *t = avctx->priv_data; ptrdiff_t linesize = frame->linesize[0]; uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16; uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8; uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->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 (!(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(TqiContext *t, int quant) { const int64_t qscale = (215 - 2*quant)*5; int i; t->intra_matrix[0] = (ff_inv_aanscales[0] * ff_mpeg1_default_intra_matrix[0]) >> 11; for(i=1; i<64; i++) t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14; } static int tqi_decode_frame(AVCodecContext *avctx, AVFrame *frame, 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; int ret, w, h; if (buf_size < 12) return AVERROR_INVALIDDATA; t->avctx = avctx; w = AV_RL16(&buf[0]); h = AV_RL16(&buf[2]); tqi_calculate_qtable(t, buf[4]); buf += 8; ret = ff_set_dimensions(avctx, w, h); 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(&t->gb, t->bitstream_buf, 8 * (buf_end - buf)); t->last_dc[0] = t->last_dc[1] = t->last_dc[2] = 0; for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) { for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) { if (tqi_decode_mb(t, t->block) < 0) goto end; tqi_idct_put(avctx, 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; } const FFCodec ff_eatqi_decoder = { .p.name = "eatqi", CODEC_LONG_NAME("Electronic Arts TQI Video"), .p.type = AVMEDIA_TYPE_VIDEO, .p.id = AV_CODEC_ID_TQI, .priv_data_size = sizeof(TqiContext), .init = tqi_decode_init, .close = tqi_decode_end, FF_CODEC_DECODE_CB(tqi_decode_frame), .p.capabilities = AV_CODEC_CAP_DR1, };