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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 #include "mpegvideo.h"
39 
40 typedef struct TqiContext {
44  unsigned int bitstream_buf_size;
45  DECLARE_ALIGNED(16, int16_t, block)[6][64];
46 } TqiContext;
47 
49 {
50  TqiContext *t = avctx->priv_data;
51  MpegEncContext *s = &t->s;
52  s->avctx = avctx;
53  ff_blockdsp_init(&s->bdsp, avctx);
55  ff_idctdsp_init(&s->idsp, avctx);
58  s->qscale = 1;
59  avctx->framerate = (AVRational){ 15, 1 };
60  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
62  return 0;
63 }
64 
65 static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64])
66 {
67  int n;
68  s->bdsp.clear_blocks(block[0]);
69  for (n=0; n<6; n++)
70  if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
71  return -1;
72 
73  return 0;
74 }
75 
76 static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64])
77 {
78  MpegEncContext *s = &t->s;
79  int linesize = frame->linesize[0];
80  uint8_t *dest_y = frame->data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16;
81  uint8_t *dest_cb = frame->data[1] + (s->mb_y * 8 * frame->linesize[1]) + s->mb_x * 8;
82  uint8_t *dest_cr = frame->data[2] + (s->mb_y * 8 * frame->linesize[2]) + s->mb_x * 8;
83 
84  ff_ea_idct_put_c(dest_y , linesize, block[0]);
85  ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
86  ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
87  ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
88  if(!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
89  ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
90  ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
91  }
92 }
93 
95 {
96  const int qscale = (215 - 2*quant)*5;
97  int i;
99  for(i=1; i<64; i++)
100  s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14;
101 }
102 
104  void *data, int *got_frame,
105  AVPacket *avpkt)
106 {
107  const uint8_t *buf = avpkt->data;
108  int buf_size = avpkt->size;
109  const uint8_t *buf_end = buf+buf_size;
110  TqiContext *t = avctx->priv_data;
111  MpegEncContext *s = &t->s;
112  AVFrame *frame = data;
113  int ret;
114 
115  s->width = AV_RL16(&buf[0]);
116  s->height = AV_RL16(&buf[2]);
117  tqi_calculate_qtable(s, buf[4]);
118  buf += 8;
119 
120  ret = ff_set_dimensions(s->avctx, s->width, s->height);
121  if (ret < 0)
122  return ret;
123 
124  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
125  return ret;
126 
128  buf_end - buf);
129  if (!t->bitstream_buf)
130  return AVERROR(ENOMEM);
131  t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
132  (buf_end - buf) / 4);
133  init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
134 
135  s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
136  for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
137  for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
138  {
139  if (tqi_decode_mb(s, t->block) < 0)
140  goto end;
141  tqi_idct_put(t, frame, t->block);
142  }
143  end:
144 
145  *got_frame = 1;
146  return buf_size;
147 }
148 
150 {
151  TqiContext *t = avctx->priv_data;
152  av_freep(&t->bitstream_buf);
153  return 0;
154 }
155 
157  .name = "eatqi",
158  .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
159  .type = AVMEDIA_TYPE_VIDEO,
160  .id = AV_CODEC_ID_TQI,
161  .priv_data_size = sizeof(TqiContext),
163  .close = tqi_decode_end,
165  .capabilities = AV_CODEC_CAP_DR1,
166 };
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
IDCTDSPContext idsp
Definition: mpegvideo.h:227
AVRational framerate
Definition: avcodec.h:3212
const char * s
Definition: avisynth_c.h:631
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
AVCodec ff_eatqi_decoder
Definition: eatqi.c:156
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static av_cold int tqi_decode_init(AVCodecContext *avctx)
Definition: eatqi.c:48
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:145
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:209
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: avcodec.h:1468
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:36
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:53
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
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:119
mpegvideo header.
AVCodec.
Definition: avcodec.h:3392
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
int qscale
QP.
Definition: mpegvideo.h:201
uint8_t
#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:149
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1467
bitstream reader API header.
static int tqi_decode_mb(MpegEncContext *s, int16_t(*block)[64])
Definition: eatqi.c:65
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:762
void * bitstream_buf
Definition: eatqi.c:43
BswapDSPContext bsdsp
Definition: eatqi.c:42
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:182
#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:1627
const char * name
Name of the codec implementation.
Definition: avcodec.h:3399
GetBitContext gb
Definition: mpegvideo.h:445
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
Definition: idctdsp.c:50
int width
picture width / height.
Definition: avcodec.h:1711
int n
Definition: avisynth_c.h:547
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
MpegEncContext s
Definition: eatqi.c:41
Libavcodec external API header.
BlockDSPContext bdsp
Definition: mpegvideo.h:223
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:209
const uint16_t ff_inv_aanscales[64]
Definition: aandcttab.c:38
main external API structure.
Definition: avcodec.h:1532
ScanTable intra_scantable
Definition: mpegvideo.h:88
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:894
void * buf
Definition: avisynth_c.h:553
static void tqi_calculate_qtable(MpegEncContext *s, int quant)
Definition: eatqi.c:94
rational number numerator/denominator
Definition: rational.h:43
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
static void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t(*block)[64])
Definition: eatqi.c:76
int ff_mpeg1_decode_block_intra(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12dec.c:219
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:192
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
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:572
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
common internal api header.
unsigned int bitstream_buf_size
Definition: eatqi.c:44
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
void * priv_data
Definition: avcodec.h:1574
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:103
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:300
#define av_freep(p)
This structure stores compressed data.
Definition: avcodec.h:1444
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:856
int16_t block[6][64]
Definition: eatqi.c:45
static int16_t block[64]
Definition: dct-test.c:112