From 150c9823e71a161e97003849cf8b2f55b21520bd Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 26 Aug 2013 15:10:18 +0100 Subject: adding ffmpeg specific version --- ffmpeg1/libavcodec/eatqi.c | 158 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 ffmpeg1/libavcodec/eatqi.c (limited to 'ffmpeg1/libavcodec/eatqi.c') diff --git a/ffmpeg1/libavcodec/eatqi.c b/ffmpeg1/libavcodec/eatqi.c new file mode 100644 index 0000000..1484ddc --- /dev/null +++ b/ffmpeg1/libavcodec/eatqi.c @@ -0,0 +1,158 @@ +/* + * Electronic Arts TQI Video Decoder + * Copyright (c) 2007-2009 Peter Ross + * + * 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 + * @see http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TQI + */ + +#include "avcodec.h" +#include "get_bits.h" +#include "aandcttab.h" +#include "eaidct.h" +#include "internal.h" +#include "mpeg12.h" +#include "mpegvideo.h" + +typedef struct TqiContext { + MpegEncContext s; + 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_dsputil_init(&s->dsp, avctx); + ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM); + ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); + s->qscale = 1; + avctx->time_base = (AVRational){1, 15}; + 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->dsp.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&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; + + if (s->avctx->width!=s->width || s->avctx->height!=s->height) + avcodec_set_dimensions(s->avctx, s->width, s->height); + + 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); + s->dsp.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_free(t->bitstream_buf); + return 0; +} + +AVCodec ff_eatqi_decoder = { + .name = "eatqi", + .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 = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"), +}; -- cgit v1.2.3