Libav
roqvideodec.c
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1 /*
2  * Copyright (C) 2003 The FFmpeg project
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 
32 #include "libavutil/imgutils.h"
33 
34 #include "avcodec.h"
35 #include "bytestream.h"
36 #include "internal.h"
37 #include "roqvideo.h"
38 
40 {
41  unsigned int chunk_id = 0, chunk_arg = 0;
42  unsigned long chunk_size = 0;
43  int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
44  int vqid, xpos, ypos, xp, yp, x, y, mx, my;
45  int frame_stats[2][4] = {{0},{0}};
46  roq_qcell *qcell;
47  int64_t chunk_start;
48 
49  while (bytestream2_get_bytes_left(&ri->gb) >= 8) {
50  chunk_id = bytestream2_get_le16(&ri->gb);
51  chunk_size = bytestream2_get_le32(&ri->gb);
52  chunk_arg = bytestream2_get_le16(&ri->gb);
53 
54  if(chunk_id == RoQ_QUAD_VQ)
55  break;
56  if(chunk_id == RoQ_QUAD_CODEBOOK) {
57  if((nv1 = chunk_arg >> 8) == 0)
58  nv1 = 256;
59  if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
60  nv2 = 256;
61  for(i = 0; i < nv1; i++) {
62  ri->cb2x2[i].y[0] = bytestream2_get_byte(&ri->gb);
63  ri->cb2x2[i].y[1] = bytestream2_get_byte(&ri->gb);
64  ri->cb2x2[i].y[2] = bytestream2_get_byte(&ri->gb);
65  ri->cb2x2[i].y[3] = bytestream2_get_byte(&ri->gb);
66  ri->cb2x2[i].u = bytestream2_get_byte(&ri->gb);
67  ri->cb2x2[i].v = bytestream2_get_byte(&ri->gb);
68  }
69  for(i = 0; i < nv2; i++)
70  for(j = 0; j < 4; j++)
71  ri->cb4x4[i].idx[j] = bytestream2_get_byte(&ri->gb);
72  }
73  }
74 
75  chunk_start = bytestream2_tell(&ri->gb);
76  xpos = ypos = 0;
77  while (bytestream2_tell(&ri->gb) < chunk_start + chunk_size) {
78  for (yp = ypos; yp < ypos + 16; yp += 8)
79  for (xp = xpos; xp < xpos + 16; xp += 8) {
80  if (vqflg_pos < 0) {
81  vqflg = bytestream2_get_le16(&ri->gb);
82  vqflg_pos = 7;
83  }
84  vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
85  frame_stats[0][vqid]++;
86  vqflg_pos--;
87 
88  switch(vqid) {
89  case RoQ_ID_MOT:
90  break;
91  case RoQ_ID_FCC: {
92  int byte = bytestream2_get_byte(&ri->gb);
93  mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
94  my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
95  ff_apply_motion_8x8(ri, xp, yp, mx, my);
96  break;
97  }
98  case RoQ_ID_SLD:
99  qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
100  ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]);
101  ff_apply_vector_4x4(ri, xp + 4, yp, ri->cb2x2 + qcell->idx[1]);
102  ff_apply_vector_4x4(ri, xp, yp + 4, ri->cb2x2 + qcell->idx[2]);
103  ff_apply_vector_4x4(ri, xp + 4, yp + 4, ri->cb2x2 + qcell->idx[3]);
104  break;
105  case RoQ_ID_CCC:
106  for (k = 0; k < 4; k++) {
107  x = xp; y = yp;
108  if(k & 0x01) x += 4;
109  if(k & 0x02) y += 4;
110 
111  if (vqflg_pos < 0) {
112  vqflg = bytestream2_get_le16(&ri->gb);
113  vqflg_pos = 7;
114  }
115  vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
116  frame_stats[1][vqid]++;
117  vqflg_pos--;
118  switch(vqid) {
119  case RoQ_ID_MOT:
120  break;
121  case RoQ_ID_FCC: {
122  int byte = bytestream2_get_byte(&ri->gb);
123  mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
124  my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
125  ff_apply_motion_4x4(ri, x, y, mx, my);
126  break;
127  }
128  case RoQ_ID_SLD:
129  qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
130  ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]);
131  ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + qcell->idx[1]);
132  ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + qcell->idx[2]);
133  ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + qcell->idx[3]);
134  break;
135  case RoQ_ID_CCC:
136  ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
137  ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
138  ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
139  ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
140  break;
141  }
142  }
143  break;
144  default:
145  av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
146  }
147  }
148 
149  xpos += 16;
150  if (xpos >= ri->width) {
151  xpos -= ri->width;
152  ypos += 16;
153  }
154  if(ypos >= ri->height)
155  break;
156  }
157 }
158 
159 
161 {
162  RoqContext *s = avctx->priv_data;
163 
164  s->avctx = avctx;
165 
166  if (avctx->width % 16 || avctx->height % 16) {
167  av_log(avctx, AV_LOG_ERROR,
168  "Dimensions must be a multiple of 16\n");
169  return AVERROR_PATCHWELCOME;
170  }
171 
172  s->width = avctx->width;
173  s->height = avctx->height;
174 
175  s->last_frame = av_frame_alloc();
177  if (!s->current_frame || !s->last_frame) {
180  return AVERROR(ENOMEM);
181  }
182 
183  avctx->pix_fmt = AV_PIX_FMT_YUV444P;
184 
185  return 0;
186 }
187 
189  void *data, int *got_frame,
190  AVPacket *avpkt)
191 {
192  const uint8_t *buf = avpkt->data;
193  int buf_size = avpkt->size;
194  RoqContext *s = avctx->priv_data;
195  int copy = !s->current_frame->data[0] && s->last_frame->data[0];
196  int ret;
197 
198  if ((ret = ff_reget_buffer(avctx, s->current_frame)) < 0) {
199  av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
200  return ret;
201  }
202 
203  if (copy) {
204  ret = av_frame_copy(s->current_frame, s->last_frame);
205  if (ret < 0)
206  return ret;
207  }
208 
209  bytestream2_init(&s->gb, buf, buf_size);
211 
212  if ((ret = av_frame_ref(data, s->current_frame)) < 0)
213  return ret;
214  *got_frame = 1;
215 
216  /* shuffle frames */
218 
219  return buf_size;
220 }
221 
223 {
224  RoqContext *s = avctx->priv_data;
225 
228 
229  return 0;
230 }
231 
233  .name = "roqvideo",
234  .long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
235  .type = AVMEDIA_TYPE_VIDEO,
236  .id = AV_CODEC_ID_ROQ,
237  .priv_data_size = sizeof(RoqContext),
239  .close = roq_decode_end,
241  .capabilities = AV_CODEC_CAP_DR1,
242 };
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:64
misc image utilities
void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
Definition: roqvideo.c:41
int size
Definition: avcodec.h:1347
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1621
#define RoQ_ID_FCC
Definition: roqvideo.h:81
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:132
AVFrame * current_frame
Definition: roqvideo.h:48
AVCodec.
Definition: avcodec.h:3120
int width
Definition: roqvideo.h:55
#define RoQ_ID_MOT
Definition: roqvideo.h:80
uint8_t
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:68
#define RoQ_QUAD_CODEBOOK
Definition: roqvideo.h:75
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:199
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:1346
static void copy(LZOContext *c, int cnt)
Copies bytes from input to output buffer with checking.
Definition: lzo.c:79
void ff_apply_motion_4x4(RoqContext *ri, int x, int y, int deltax, int deltay)
Definition: roqvideo.c:133
void ff_apply_motion_8x8(RoqContext *ri, int x, int y, int deltax, int deltay)
Definition: roqvideo.c:139
static av_cold int roq_decode_end(AVCodecContext *avctx)
Definition: roqvideodec.c:222
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
static void roqvideo_decode_frame(RoqContext *ri)
Definition: roqvideodec.c:39
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:80
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
static int roq_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: roqvideodec.c:188
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:151
roq_qcell cb4x4[256]
Definition: roqvideo.h:52
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
#define RoQ_ID_CCC
Definition: roqvideo.h:83
unsigned char u
Definition: roqvideo.h:31
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
Definition: frame.c:556
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
Definition: utils.c:672
int width
picture width / height.
Definition: avcodec.h:1580
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: avconv.c:1288
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
int idx[4]
Definition: roqvideo.h:35
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:185
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:1409
GetByteContext gb
Definition: roqvideo.h:54
#define RoQ_ID_SLD
Definition: roqvideo.h:82
unsigned char y[4]
Definition: roqvideo.h:30
static av_cold int roq_decode_init(AVCodecContext *avctx)
Definition: roqvideodec.c:160
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
AVCodecContext * avctx
Definition: roqvideo.h:46
common internal api header.
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
#define RoQ_QUAD_VQ
Definition: roqvideo.h:76
AVCodec ff_roq_decoder
Definition: roqvideodec.c:232
void * priv_data
Definition: avcodec.h:1451
void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
Definition: roqvideo.c:71
roq_cell cb2x2[256]
Definition: roqvideo.h:51
AVFrame * last_frame
Definition: roqvideo.h:47
#define FFSWAP(type, a, b)
Definition: common.h:69
This structure stores compressed data.
Definition: avcodec.h:1323
unsigned char v
Definition: roqvideo.h:31
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:838
int height
Definition: roqvideo.h:55