lavc decoders: work with refcounted frames.
[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 "get_bits.h"
31 #include "aandcttab.h"
32 #include "eaidct.h"
33 #include "internal.h"
34 #include "mpeg12.h"
35 #include "mpegvideo.h"
36
37 typedef struct TqiContext {
38 MpegEncContext s;
39 void *bitstream_buf;
40 unsigned int bitstream_buf_size;
41 DECLARE_ALIGNED(16, int16_t, block)[6][64];
42 } TqiContext;
43
44 static av_cold int tqi_decode_init(AVCodecContext *avctx)
45 {
46 TqiContext *t = avctx->priv_data;
47 MpegEncContext *s = &t->s;
48 s->avctx = avctx;
49 ff_dsputil_init(&s->dsp, avctx);
50 ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
51 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
52 s->qscale = 1;
53 avctx->time_base = (AVRational){1, 15};
54 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
55 ff_mpeg12_init_vlcs();
56 return 0;
57 }
58
59 static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64])
60 {
61 int n;
62 s->dsp.clear_blocks(block[0]);
63 for (n=0; n<6; n++)
64 if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
65 return -1;
66
67 return 0;
68 }
69
70 static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64])
71 {
72 MpegEncContext *s = &t->s;
73 int linesize = frame->linesize[0];
74 uint8_t *dest_y = frame->data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16;
75 uint8_t *dest_cb = frame->data[1] + (s->mb_y * 8 * frame->linesize[1]) + s->mb_x * 8;
76 uint8_t *dest_cr = frame->data[2] + (s->mb_y * 8 * frame->linesize[2]) + s->mb_x * 8;
77
78 ff_ea_idct_put_c(dest_y , linesize, block[0]);
79 ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
80 ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
81 ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
82 if(!(s->avctx->flags&CODEC_FLAG_GRAY)) {
83 ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
84 ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
85 }
86 }
87
88 static void tqi_calculate_qtable(MpegEncContext *s, int quant)
89 {
90 const int qscale = (215 - 2*quant)*5;
91 int i;
92 s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0])>>11;
93 for(i=1; i<64; i++)
94 s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14;
95 }
96
97 static int tqi_decode_frame(AVCodecContext *avctx,
98 void *data, int *got_frame,
99 AVPacket *avpkt)
100 {
101 const uint8_t *buf = avpkt->data;
102 int buf_size = avpkt->size;
103 const uint8_t *buf_end = buf+buf_size;
104 TqiContext *t = avctx->priv_data;
105 MpegEncContext *s = &t->s;
106 AVFrame *frame = data;
107 int ret;
108
109 s->width = AV_RL16(&buf[0]);
110 s->height = AV_RL16(&buf[2]);
111 tqi_calculate_qtable(s, buf[4]);
112 buf += 8;
113
114 if (s->avctx->width!=s->width || s->avctx->height!=s->height)
115 avcodec_set_dimensions(s->avctx, s->width, s->height);
116
117 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
118 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
119 return ret;
120 }
121
122 av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
123 buf_end - buf);
124 if (!t->bitstream_buf)
125 return AVERROR(ENOMEM);
126 s->dsp.bswap_buf(t->bitstream_buf, (const uint32_t*)buf, (buf_end-buf)/4);
127 init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
128
129 s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
130 for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
131 for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
132 {
133 if (tqi_decode_mb(s, t->block) < 0)
134 break;
135 tqi_idct_put(t, frame, t->block);
136 }
137
138 *got_frame = 1;
139 return buf_size;
140 }
141
142 static av_cold int tqi_decode_end(AVCodecContext *avctx)
143 {
144 TqiContext *t = avctx->priv_data;
145 av_free(t->bitstream_buf);
146 return 0;
147 }
148
149 AVCodec ff_eatqi_decoder = {
150 .name = "eatqi",
151 .type = AVMEDIA_TYPE_VIDEO,
152 .id = AV_CODEC_ID_TQI,
153 .priv_data_size = sizeof(TqiContext),
154 .init = tqi_decode_init,
155 .close = tqi_decode_end,
156 .decode = tqi_decode_frame,
157 .capabilities = CODEC_CAP_DR1,
158 .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
159 };