2 * Electronic Arts TQI Video Decoder
3 * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org>
5 * This file is part of FFmpeg.
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.
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.
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
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
33 #include "aandcttab.h"
37 #include "mpegvideo.h"
39 typedef struct TqiContext {
41 BswapDSPContext bsdsp;
43 unsigned int bitstream_buf_size;
44 DECLARE_ALIGNED(16, int16_t, block)[6][64];
47 static av_cold int tqi_decode_init(AVCodecContext *avctx)
49 TqiContext *t = avctx->priv_data;
50 MpegEncContext *s = &t->s;
52 ff_blockdsp_init(&s->bdsp, avctx);
53 ff_bswapdsp_init(&t->bsdsp);
54 ff_dsputil_init(&s->dsp, avctx);
55 ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
56 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
58 avctx->time_base = (AVRational){1, 15};
59 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
60 ff_mpeg12_init_vlcs();
64 static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64])
67 s->bdsp.clear_blocks(block[0]);
69 if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
75 static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64])
77 MpegEncContext *s = &t->s;
78 int linesize = frame->linesize[0];
79 uint8_t *dest_y = frame->data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16;
80 uint8_t *dest_cb = frame->data[1] + (s->mb_y * 8 * frame->linesize[1]) + s->mb_x * 8;
81 uint8_t *dest_cr = frame->data[2] + (s->mb_y * 8 * frame->linesize[2]) + s->mb_x * 8;
83 ff_ea_idct_put_c(dest_y , linesize, block[0]);
84 ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
85 ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
86 ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
87 if(!(s->avctx->flags&CODEC_FLAG_GRAY)) {
88 ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
89 ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
93 static void tqi_calculate_qtable(MpegEncContext *s, int quant)
95 const int qscale = (215 - 2*quant)*5;
97 s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0])>>11;
99 s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14;
102 static int tqi_decode_frame(AVCodecContext *avctx,
103 void *data, int *got_frame,
106 const uint8_t *buf = avpkt->data;
107 int buf_size = avpkt->size;
108 const uint8_t *buf_end = buf+buf_size;
109 TqiContext *t = avctx->priv_data;
110 MpegEncContext *s = &t->s;
111 AVFrame *frame = data;
114 s->width = AV_RL16(&buf[0]);
115 s->height = AV_RL16(&buf[2]);
116 tqi_calculate_qtable(s, buf[4]);
119 ret = ff_set_dimensions(s->avctx, s->width, s->height);
123 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
126 av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
128 if (!t->bitstream_buf)
129 return AVERROR(ENOMEM);
130 t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
131 (buf_end - buf) / 4);
132 init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
134 s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
135 for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
136 for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
138 if (tqi_decode_mb(s, t->block) < 0)
140 tqi_idct_put(t, frame, t->block);
148 static av_cold int tqi_decode_end(AVCodecContext *avctx)
150 TqiContext *t = avctx->priv_data;
151 av_free(t->bitstream_buf);
155 AVCodec ff_eatqi_decoder = {
157 .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
158 .type = AVMEDIA_TYPE_VIDEO,
159 .id = AV_CODEC_ID_TQI,
160 .priv_data_size = sizeof(TqiContext),
161 .init = tqi_decode_init,
162 .close = tqi_decode_end,
163 .decode = tqi_decode_frame,
164 .capabilities = CODEC_CAP_DR1,