FFmpeg  4.4
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 "libavutil/mem_internal.h"
30 
31 #include "avcodec.h"
32 #include "blockdsp.h"
33 #include "bswapdsp.h"
34 #include "get_bits.h"
35 #include "aandcttab.h"
36 #include "eaidct.h"
37 #include "idctdsp.h"
38 #include "internal.h"
39 #include "mpeg12.h"
40 
41 typedef struct TqiContext {
48 
50  unsigned int bitstream_buf_size;
51 
52  int mb_x, mb_y;
53  uint16_t intra_matrix[64];
54  int last_dc[3];
55 
56  DECLARE_ALIGNED(32, int16_t, block)[6][64];
57 } TqiContext;
58 
60 {
61  TqiContext *t = avctx->priv_data;
62 
63  ff_blockdsp_init(&t->bdsp, avctx);
65  ff_idctdsp_init(&t->idsp, avctx);
68 
69  avctx->framerate = (AVRational){ 15, 1 };
70  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
72  return 0;
73 }
74 
75 static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
76 {
77  int n;
78 
79  t->bdsp.clear_blocks(block[0]);
80  for (n = 0; n < 6; n++) {
81  int ret = ff_mpeg1_decode_block_intra(&t->gb,
82  t->intra_matrix,
84  t->last_dc, block[n], n, 1);
85  if (ret < 0) {
86  av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
87  t->mb_x, t->mb_y);
88  return ret;
89  }
90  }
91 
92  return 0;
93 }
94 
95 static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame,
96  int16_t (*block)[64])
97 {
98  TqiContext *t = avctx->priv_data;
99  ptrdiff_t linesize = frame->linesize[0];
100  uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16;
101  uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8;
102  uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->mb_x * 8;
103 
104  ff_ea_idct_put_c(dest_y , linesize, block[0]);
105  ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
106  ff_ea_idct_put_c(dest_y + 8*linesize , linesize, block[2]);
107  ff_ea_idct_put_c(dest_y + 8*linesize + 8, linesize, block[3]);
108 
109  if (!(avctx->flags & AV_CODEC_FLAG_GRAY)) {
110  ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
111  ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
112  }
113 }
114 
116 {
117  const int64_t qscale = (215 - 2*quant)*5;
118  int i;
119 
121  for(i=1; i<64; i++)
122  t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14;
123 }
124 
126  void *data, int *got_frame,
127  AVPacket *avpkt)
128 {
129  const uint8_t *buf = avpkt->data;
130  int buf_size = avpkt->size;
131  const uint8_t *buf_end = buf+buf_size;
132  TqiContext *t = avctx->priv_data;
133  AVFrame *frame = data;
134  int ret, w, h;
135 
136  if (buf_size < 12)
137  return AVERROR_INVALIDDATA;
138 
139  t->avctx = avctx;
140 
141  w = AV_RL16(&buf[0]);
142  h = AV_RL16(&buf[2]);
143  tqi_calculate_qtable(t, buf[4]);
144  buf += 8;
145 
146  ret = ff_set_dimensions(avctx, w, h);
147  if (ret < 0)
148  return ret;
149 
150  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
151  return ret;
152 
154  buf_end - buf);
155  if (!t->bitstream_buf)
156  return AVERROR(ENOMEM);
157  t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
158  (buf_end - buf) / 4);
159  init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));
160 
161  t->last_dc[0] =
162  t->last_dc[1] =
163  t->last_dc[2] = 0;
164  for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
165  for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
166  if (tqi_decode_mb(t, t->block) < 0)
167  goto end;
168  tqi_idct_put(avctx, frame, t->block);
169  }
170  }
171  end:
172 
173  *got_frame = 1;
174  return buf_size;
175 }
176 
178 {
179  TqiContext *t = avctx->priv_data;
180  av_freep(&t->bitstream_buf);
181  return 0;
182 }
183 
185  .name = "eatqi",
186  .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
187  .type = AVMEDIA_TYPE_VIDEO,
188  .id = AV_CODEC_ID_TQI,
189  .priv_data_size = sizeof(TqiContext),
191  .close = tqi_decode_end,
193  .capabilities = AV_CODEC_CAP_DR1,
194  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
195 };
const uint16_t ff_inv_aanscales[64]
Definition: aandcttab.c:38
AAN (Arai, Agui and Nakajima) (I)DCT tables.
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
#define AV_RL16
Definition: intreadwrite.h:42
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1893
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static AVFrame * frame
void ff_ea_idct_put_c(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
Definition: eaidct.c:80
static void tqi_calculate_qtable(TqiContext *t, int quant)
Definition: eatqi.c:115
static av_cold int tqi_decode_init(AVCodecContext *avctx)
Definition: eatqi.c:59
static int tqi_decode_mb(TqiContext *t, int16_t(*block)[64])
Definition: eatqi.c:75
static void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame, int16_t(*block)[64])
Definition: eatqi.c:95
AVCodec ff_eatqi_decoder
Definition: eatqi.c:184
static int tqi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: eatqi.c:125
static av_cold int tqi_decode_end(AVCodecContext *avctx)
Definition: eatqi.c:177
bitstream reader API header.
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:308
@ AV_CODEC_ID_TQI
Definition: codec_id.h:171
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:50
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:117
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:238
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
Definition: idctdsp.c:50
@ FF_IDCT_PERM_NONE
Definition: idctdsp.h:38
int i
Definition: input.c:407
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:60
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
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:84
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
uint8_t w
Definition: llviddspenc.c:39
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
av_cold void ff_mpeg12_init_vlcs(void)
Definition: mpeg12.c:165
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:237
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
AVRational framerate
Definition: avcodec.h:2071
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:616
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Rational number (pair of numerator and denominator).
Definition: rational.h:58
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
Scantable.
Definition: idctdsp.h:31
uint8_t permutated[64]
Definition: idctdsp.h:33
int16_t block[6][64]
Definition: eatqi.c:56
BlockDSPContext bdsp
Definition: eatqi.c:44
AVCodecContext * avctx
Definition: eatqi.c:42
IDCTDSPContext idsp
Definition: eatqi.c:46
int last_dc[3]
Definition: eatqi.c:54
ScanTable intra_scantable
Definition: eatqi.c:47
uint16_t intra_matrix[64]
Definition: eatqi.c:53
int mb_y
Definition: eatqi.c:52
GetBitContext gb
Definition: eatqi.c:43
unsigned int bitstream_buf_size
Definition: eatqi.c:50
int mb_x
Definition: eatqi.c:52
void * bitstream_buf
Definition: eatqi.c:49
BswapDSPContext bsdsp
Definition: eatqi.c:45
#define av_freep(p)
#define av_log(a,...)
static int16_t block[64]
Definition: dct.c:116
const uint8_t * quant