eatqi: Remove MpegEncContext dependency
[libav.git] / libavcodec / eatqi.c
1 /*
2 * Electronic Arts TQI Video Decoder
3 * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org>
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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
39 typedef struct TqiContext {
40 GetBitContext gb;
41 BlockDSPContext bdsp;
42 BswapDSPContext bsdsp;
43 IDCTDSPContext idsp;
44 ScanTable intra_scantable;
45
46 void *bitstream_buf;
47 unsigned int bitstream_buf_size;
48
49 int mb_x, mb_y;
50 uint16_t intra_matrix[64];
51 int last_dc[3];
52
53 DECLARE_ALIGNED(16, int16_t, block)[6][64];
54 } TqiContext;
55
56 static av_cold int tqi_decode_init(AVCodecContext *avctx)
57 {
58 TqiContext *t = avctx->priv_data;
59
60 ff_blockdsp_init(&t->bdsp, avctx);
61 ff_bswapdsp_init(&t->bsdsp);
62 ff_idctdsp_init(&t->idsp, avctx);
63 ff_init_scantable_permutation(t->idsp.idct_permutation, FF_IDCT_PERM_NONE);
64 ff_init_scantable(t->idsp.idct_permutation, &t->intra_scantable, ff_zigzag_direct);
65
66 avctx->framerate = (AVRational){ 15, 1 };
67 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
68 ff_mpeg12_init_vlcs();
69 return 0;
70 }
71
72 static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
73 {
74 int n;
75
76 t->bdsp.clear_blocks(block[0]);
77 for (n = 0; n < 6; n++) {
78 int ret = ff_mpeg1_decode_block_intra(&t->gb,
79 t->intra_matrix,
80 t->intra_scantable.permutated,
81 t->last_dc, block[n], n, 1);
82 if (ret < 0)
83 return -1;
84 }
85
86 return 0;
87 }
88
89 static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame,
90 int16_t (*block)[64])
91 {
92 TqiContext *t = avctx->priv_data;
93 int linesize = frame->linesize[0];
94 uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16;
95 uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8;
96 uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->mb_x * 8;
97
98 ff_ea_idct_put_c(dest_y , linesize, block[0]);
99 ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
100 ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
101 ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
102
103 if (!(avctx->flags & AV_CODEC_FLAG_GRAY)) {
104 ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
105 ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
106 }
107 }
108
109 static void tqi_calculate_qtable(TqiContext *t, int quant)
110 {
111 const int qscale = (215 - 2*quant)*5;
112 int i;
113
114 t->intra_matrix[0] = (ff_inv_aanscales[0] * ff_mpeg1_default_intra_matrix[0]) >> 11;
115 for(i=1; i<64; i++)
116 t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14;
117 }
118
119 static int tqi_decode_frame(AVCodecContext *avctx,
120 void *data, int *got_frame,
121 AVPacket *avpkt)
122 {
123 const uint8_t *buf = avpkt->data;
124 int buf_size = avpkt->size;
125 const uint8_t *buf_end = buf+buf_size;
126 TqiContext *t = avctx->priv_data;
127 AVFrame *frame = data;
128 int ret, w, h;
129
130 w = AV_RL16(&buf[0]);
131 h = AV_RL16(&buf[2]);
132 tqi_calculate_qtable(t, buf[4]);
133 buf += 8;
134
135 ret = ff_set_dimensions(avctx, w, h);
136 if (ret < 0)
137 return ret;
138
139 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
140 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
141 return ret;
142 }
143
144 av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
145 buf_end - buf);
146 if (!t->bitstream_buf)
147 return AVERROR(ENOMEM);
148 t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
149 (buf_end - buf) / 4);
150 init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));
151
152 t->last_dc[0] =
153 t->last_dc[1] =
154 t->last_dc[2] = 0;
155 for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
156 for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
157 if (tqi_decode_mb(t, t->block) < 0)
158 break;
159 tqi_idct_put(avctx, frame, t->block);
160 }
161 }
162
163 *got_frame = 1;
164 return buf_size;
165 }
166
167 static av_cold int tqi_decode_end(AVCodecContext *avctx)
168 {
169 TqiContext *t = avctx->priv_data;
170 av_free(t->bitstream_buf);
171 return 0;
172 }
173
174 AVCodec ff_eatqi_decoder = {
175 .name = "eatqi",
176 .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
177 .type = AVMEDIA_TYPE_VIDEO,
178 .id = AV_CODEC_ID_TQI,
179 .priv_data_size = sizeof(TqiContext),
180 .init = tqi_decode_init,
181 .close = tqi_decode_end,
182 .decode = tqi_decode_frame,
183 .capabilities = AV_CODEC_CAP_DR1,
184 };