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 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 
29 #include "avcodec.h"
30 #include "get_bits.h"
31 #include "dsputil.h"
32 #include "aandcttab.h"
33 #include "eaidct.h"
34 #include "internal.h"
35 #include "mpeg12.h"
36 #include "mpegvideo.h"
37 
38 typedef struct TqiContext {
42  unsigned int bitstream_buf_size;
44 } TqiContext;
45 
47 {
48  TqiContext *t = avctx->priv_data;
49  MpegEncContext *s = &t->s;
50  s->avctx = avctx;
51  ff_dsputil_init(&s->dsp, avctx);
54  s->qscale = 1;
55  avctx->time_base = (AVRational){1, 15};
56  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
58  return 0;
59 }
60 
61 static int tqi_decode_mb(MpegEncContext *s, DCTELEM (*block)[64])
62 {
63  int n;
64  s->dsp.clear_blocks(block[0]);
65  for (n=0; n<6; n++)
66  if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
67  return -1;
68 
69  return 0;
70 }
71 
72 static inline void tqi_idct_put(TqiContext *t, DCTELEM (*block)[64])
73 {
74  MpegEncContext *s = &t->s;
75  int linesize= t->frame.linesize[0];
76  uint8_t *dest_y = t->frame.data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16;
77  uint8_t *dest_cb = t->frame.data[1] + (s->mb_y * 8 * t->frame.linesize[1]) + s->mb_x * 8;
78  uint8_t *dest_cr = t->frame.data[2] + (s->mb_y * 8 * t->frame.linesize[2]) + s->mb_x * 8;
79 
80  ff_ea_idct_put_c(dest_y , linesize, block[0]);
81  ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
82  ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
83  ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
84  if(!(s->avctx->flags&CODEC_FLAG_GRAY)) {
85  ff_ea_idct_put_c(dest_cb, t->frame.linesize[1], block[4]);
86  ff_ea_idct_put_c(dest_cr, t->frame.linesize[2], block[5]);
87  }
88 }
89 
91 {
92  const int qscale = (215 - 2*quant)*5;
93  int i;
95  for(i=1; i<64; i++)
96  s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14;
97 }
98 
99 static int tqi_decode_frame(AVCodecContext *avctx,
100  void *data, int *got_frame,
101  AVPacket *avpkt)
102 {
103  const uint8_t *buf = avpkt->data;
104  int buf_size = avpkt->size;
105  const uint8_t *buf_end = buf+buf_size;
106  TqiContext *t = avctx->priv_data;
107  MpegEncContext *s = &t->s;
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 (t->frame.data[0])
115  avctx->release_buffer(avctx, &t->frame);
116 
117  if (s->avctx->width!=s->width || s->avctx->height!=s->height)
119 
120  if(ff_get_buffer(avctx, &t->frame) < 0) {
121  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
122  return -1;
123  }
124 
126  buf_end - buf);
127  if (!t->bitstream_buf)
128  return AVERROR(ENOMEM);
129  s->dsp.bswap_buf(t->bitstream_buf, (const uint32_t*)buf, (buf_end-buf)/4);
130  init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
131 
132  s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
133  for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
134  for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
135  {
136  if (tqi_decode_mb(s, t->block) < 0)
137  break;
138  tqi_idct_put(t, t->block);
139  }
140 
141  *got_frame = 1;
142  *(AVFrame*)data = t->frame;
143  return buf_size;
144 }
145 
147 {
148  TqiContext *t = avctx->priv_data;
149  if(t->frame.data[0])
150  avctx->release_buffer(avctx, &t->frame);
152  return 0;
153 }
154 
156  .name = "eatqi",
157  .type = AVMEDIA_TYPE_VIDEO,
158  .id = AV_CODEC_ID_TQI,
159  .priv_data_size = sizeof(TqiContext),
163  .capabilities = CODEC_CAP_DR1,
164  .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
165 };
av_cold void ff_dsputil_init(DSPContext *c, AVCodecContext *avctx)
Definition: dsputil.c:2656
struct TqiContext TqiContext
const uint8_t ff_zigzag_direct[64]
Definition: dsputil.c:59
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
AVCodec ff_eatqi_decoder
Definition: eatqi.c:155
static av_cold int tqi_decode_init(AVCodecContext *avctx)
Definition: eatqi.c:46
void(* release_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called to release buffers which were allocated with get_buffer.
Definition: avcodec.h:2259
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:667
AVFrame frame
Definition: eatqi.c:40
void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
Definition: utils.c:149
int size
Definition: avcodec.h:916
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1533
#define AV_RL16
Definition: intreadwrite.h:42
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer with padding, reusing the given one if large enough.
Definition: utils.c:85
mpegvideo header.
AVCodec.
Definition: avcodec.h:2960
int qscale
QP.
Definition: mpegvideo.h:342
static int tqi_decode_mb(MpegEncContext *s, DCTELEM(*block)[64])
Definition: eatqi.c:61
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1465
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:228
uint8_t
static av_cold int tqi_decode_end(AVCodecContext *avctx)
Definition: eatqi.c:146
const char data[16]
Definition: mxf.c:66
uint8_t * data
Definition: avcodec.h:915
bitstream reader API header.
uint8_t idct_permutation[64]
idct input permutation.
Definition: dsputil.h:425
static float t
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
void * bitstream_buf
Definition: eatqi.c:41
const uint16_t ff_mpeg1_default_intra_matrix[64]
Definition: mpeg12data.c:30
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:139
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:321
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: dsputil.h:343
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
int ff_mpeg1_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n)
Definition: mpeg12.c:154
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1434
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
GetBitContext gb
Definition: mpegvideo.h:626
struct AVRational AVRational
rational number numerator/denominator
static DCTELEM block[64]
Definition: dct-test.c:169
int width
picture width / height.
Definition: avcodec.h:1508
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame)
Get a buffer for a frame.
Definition: utils.c:464
#define FF_NO_IDCT_PERM
Definition: dsputil.h:427
MpegEncContext s
Definition: eatqi.c:39
external API header
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
const uint16_t ff_inv_aanscales[64]
Definition: aandcttab.c:38
main external API structure.
Definition: avcodec.h:1339
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
ScanTable intra_scantable
Definition: mpegvideo.h:266
static void tqi_idct_put(TqiContext *t, DCTELEM(*block)[64])
Definition: eatqi.c:72
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:215
static void tqi_calculate_qtable(MpegEncContext *s, int quant)
Definition: eatqi.c:90
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:372
DSPContext dsp
pointers for accelerated dsp functions
Definition: mpegvideo.h:361
void ff_init_scantable_permutation(uint8_t *idct_permutation, int idct_permutation_type)
Definition: dsputil.c:143
short DCTELEM
Definition: dsputil.h:39
const uint8_t * quant
AAN (Arai Agui Nakajima) (I)DCT tables.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
void(* clear_blocks)(DCTELEM *blocks)
Definition: dsputil.h:219
MpegEncContext.
Definition: mpegvideo.h:211
struct AVCodecContext * avctx
Definition: mpegvideo.h:213
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
common internal api header.
void ff_ea_idct_put_c(uint8_t *dest, int linesize, DCTELEM *block)
Definition: eaidct.c:81
unsigned int bitstream_buf_size
Definition: eatqi.c:42
DSP utils.
void * priv_data
Definition: avcodec.h:1382
void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: dsputil.c:122
static int tqi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: eatqi.c:99
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
Definition: mpegvideo.h:440
DCTELEM block[6][64]
Definition: eatqi.c:43
This structure stores compressed data.
Definition: avcodec.h:898