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eatqi.c
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1 /*
2  * Electronic Arts TQI Video Decoder
3  * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org>
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
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 {
46 
48  unsigned int bitstream_buf_size;
49 
50  int mb_x, mb_y;
51  uint16_t intra_matrix[64];
52  int last_dc[3];
53 
54  DECLARE_ALIGNED(16, int16_t, block)[6][64];
55 } TqiContext;
56 
58 {
59  TqiContext *t = avctx->priv_data;
60 
61  ff_blockdsp_init(&t->bdsp, avctx);
63  ff_idctdsp_init(&t->idsp, avctx);
66 
67  avctx->framerate = (AVRational){ 15, 1 };
68  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
70  return 0;
71 }
72 
73 static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
74 {
75  int n;
76 
77  t->bdsp.clear_blocks(block[0]);
78  for (n = 0; n < 6; n++) {
79  int ret = ff_mpeg1_decode_block_intra(&t->gb,
80  t->intra_matrix,
82  t->last_dc, block[n], n, 1);
83  if (ret < 0) {
84  av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
85  t->mb_x, t->mb_y);
86  return -1;
87  }
88  }
89 
90  return 0;
91 }
92 
93 static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame,
94  int16_t (*block)[64])
95 {
96  TqiContext *t = avctx->priv_data;
97  int linesize = frame->linesize[0];
98  uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16;
99  uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8;
100  uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->mb_x * 8;
101 
102  ff_ea_idct_put_c(dest_y , linesize, block[0]);
103  ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
104  ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
105  ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
106 
107  if (!(avctx->flags & AV_CODEC_FLAG_GRAY)) {
108  ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
109  ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
110  }
111 }
112 
114 {
115  const int qscale = (215 - 2*quant)*5;
116  int i;
117 
119  for(i=1; i<64; i++)
120  t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14;
121 }
122 
124  void *data, int *got_frame,
125  AVPacket *avpkt)
126 {
127  const uint8_t *buf = avpkt->data;
128  int buf_size = avpkt->size;
129  const uint8_t *buf_end = buf+buf_size;
130  TqiContext *t = avctx->priv_data;
131  AVFrame *frame = data;
132  int ret, w, h;
133 
134  t->avctx = avctx;
135 
136  w = AV_RL16(&buf[0]);
137  h = AV_RL16(&buf[2]);
138  tqi_calculate_qtable(t, buf[4]);
139  buf += 8;
140 
141  ret = ff_set_dimensions(avctx, w, h);
142  if (ret < 0)
143  return ret;
144 
145  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
146  return ret;
147 
149  buf_end - buf);
150  if (!t->bitstream_buf)
151  return AVERROR(ENOMEM);
152  t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
153  (buf_end - buf) / 4);
154  init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));
155 
156  t->last_dc[0] =
157  t->last_dc[1] =
158  t->last_dc[2] = 0;
159  for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
160  for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
161  if (tqi_decode_mb(t, t->block) < 0)
162  goto end;
163  tqi_idct_put(avctx, frame, t->block);
164  }
165  }
166  end:
167 
168  *got_frame = 1;
169  return buf_size;
170 }
171 
173 {
174  TqiContext *t = avctx->priv_data;
175  av_freep(&t->bitstream_buf);
176  return 0;
177 }
178 
180  .name = "eatqi",
181  .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
182  .type = AVMEDIA_TYPE_VIDEO,
183  .id = AV_CODEC_ID_TQI,
184  .priv_data_size = sizeof(TqiContext),
186  .close = tqi_decode_end,
188  .capabilities = AV_CODEC_CAP_DR1,
189 };
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
AVRational framerate
Definition: avcodec.h:3374
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
AVCodec ff_eatqi_decoder
Definition: eatqi.c:179
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static av_cold int tqi_decode_init(AVCodecContext *avctx)
Definition: eatqi.c:57
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:144
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:210
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVCodecContext * avctx
Definition: eatqi.c:40
Scantable.
Definition: idctdsp.h:29
int size
Definition: avcodec.h:1601
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:36
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1903
static void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame, int16_t(*block)[64])
Definition: eatqi.c:93
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:120
uint8_t permutated[64]
Definition: idctdsp.h:31
static int tqi_decode_mb(TqiContext *t, int16_t(*block)[64])
Definition: eatqi.c:73
AVCodec.
Definition: avcodec.h:3589
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static int16_t block[64]
Definition: dct.c:113
uint8_t
static void tqi_calculate_qtable(TqiContext *t, int quant)
Definition: eatqi.c:113
#define av_cold
Definition: attributes.h:82
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
static av_cold int tqi_decode_end(AVCodecContext *avctx)
Definition: eatqi.c:172
static AVFrame * frame
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:101
uint8_t * data
Definition: avcodec.h:1600
bitstream reader API header.
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:860
#define av_log(a,...)
void * bitstream_buf
Definition: eatqi.c:47
BswapDSPContext bsdsp
Definition: eatqi.c:43
BlockDSPContext bdsp
Definition: eatqi.c:42
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int last_dc[3]
Definition: eatqi.c:52
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1770
const char * name
Name of the codec implementation.
Definition: avcodec.h:3596
int mb_x
Definition: eatqi.c:50
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
Definition: idctdsp.c:50
ScanTable intra_scantable
Definition: eatqi.c:45
int n
Definition: avisynth_c.h:684
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
GetBitContext gb
Definition: eatqi.c:41
Libavcodec external API header.
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
const uint16_t ff_inv_aanscales[64]
Definition: aandcttab.c:38
main external API structure.
Definition: avcodec.h:1675
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:934
void * buf
Definition: avisynth_c.h:690
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
IDCTDSPContext idsp
Definition: eatqi.c:44
const uint8_t * quant
AAN (Arai, Agui and Nakajima) (I)DCT tables.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
int mb_y
Definition: eatqi.c:50
void ff_ea_idct_put_c(uint8_t *dest, int linesize, int16_t *block)
Definition: eaidct.c:80
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:750
int ff_mpeg1_decode_block_intra(GetBitContext *gb, const uint16_t *quant_matrix, uint8_t *const scantable, int last_dc[3], int16_t *block, int index, int qscale)
Definition: mpeg12.c:247
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
common internal api header.
uint16_t intra_matrix[64]
Definition: eatqi.c:51
unsigned int bitstream_buf_size
Definition: eatqi.c:48
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
void * priv_data
Definition: avcodec.h:1717
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:241
static int tqi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: eatqi.c:123
#define av_freep(p)
This structure stores compressed data.
Definition: avcodec.h:1577
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958
int16_t block[6][64]
Definition: eatqi.c:54