FFmpeg  2.8.17
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nuv.c
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1 /*
2  * NuppelVideo decoder
3  * Copyright (c) 2006 Reimar Doeffinger
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 Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <limits.h>
25 
26 #include "libavutil/bswap.h"
27 #include "libavutil/common.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/lzo.h"
30 #include "libavutil/imgutils.h"
31 #include "avcodec.h"
32 #include "idctdsp.h"
33 #include "internal.h"
34 #include "rtjpeg.h"
35 
36 typedef struct NuvContext {
39  int quality;
40  int width, height;
41  unsigned int decomp_size;
42  unsigned char *decomp_buf;
43  uint32_t lq[64], cq[64];
45 } NuvContext;
46 
47 static const uint8_t fallback_lquant[] = {
48  16, 11, 10, 16, 24, 40, 51, 61,
49  12, 12, 14, 19, 26, 58, 60, 55,
50  14, 13, 16, 24, 40, 57, 69, 56,
51  14, 17, 22, 29, 51, 87, 80, 62,
52  18, 22, 37, 56, 68, 109, 103, 77,
53  24, 35, 55, 64, 81, 104, 113, 92,
54  49, 64, 78, 87, 103, 121, 120, 101,
55  72, 92, 95, 98, 112, 100, 103, 99
56 };
57 
58 static const uint8_t fallback_cquant[] = {
59  17, 18, 24, 47, 99, 99, 99, 99,
60  18, 21, 26, 66, 99, 99, 99, 99,
61  24, 26, 56, 99, 99, 99, 99, 99,
62  47, 66, 99, 99, 99, 99, 99, 99,
63  99, 99, 99, 99, 99, 99, 99, 99,
64  99, 99, 99, 99, 99, 99, 99, 99,
65  99, 99, 99, 99, 99, 99, 99, 99,
66  99, 99, 99, 99, 99, 99, 99, 99
67 };
68 
69 /**
70  * @brief copy frame data from buffer to AVFrame, handling stride.
71  * @param f destination AVFrame
72  * @param src source buffer, does not use any line-stride
73  * @param width width of the video frame
74  * @param height height of the video frame
75  */
76 static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
77 {
78  AVPicture pic;
79  avpicture_fill(&pic, src, AV_PIX_FMT_YUV420P, width, height);
80  av_picture_copy((AVPicture *)f, &pic, AV_PIX_FMT_YUV420P, width, height);
81 }
82 
83 /**
84  * @brief extract quantization tables from codec data into our context
85  */
86 static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf,
87  int size)
88 {
89  int i;
90  if (size < 2 * 64 * 4) {
91  av_log(avctx, AV_LOG_ERROR, "insufficient rtjpeg quant data\n");
92  return AVERROR_INVALIDDATA;
93  }
94  for (i = 0; i < 64; i++, buf += 4)
95  c->lq[i] = AV_RL32(buf);
96  for (i = 0; i < 64; i++, buf += 4)
97  c->cq[i] = AV_RL32(buf);
98  return 0;
99 }
100 
101 /**
102  * @brief set quantization tables from a quality value
103  */
104 static void get_quant_quality(NuvContext *c, int quality)
105 {
106  int i;
107  quality = FFMAX(quality, 1);
108  for (i = 0; i < 64; i++) {
109  c->lq[i] = (fallback_lquant[i] << 7) / quality;
110  c->cq[i] = (fallback_cquant[i] << 7) / quality;
111  }
112 }
113 
114 static int codec_reinit(AVCodecContext *avctx, int width, int height,
115  int quality)
116 {
117  NuvContext *c = avctx->priv_data;
118  int ret;
119 
120  width = FFALIGN(width, 2);
121  height = FFALIGN(height, 2);
122  if (quality >= 0)
123  get_quant_quality(c, quality);
124  if (width != c->width || height != c->height) {
125  // also reserve space for a possible additional header
126  int64_t buf_size = height * (int64_t)width * 3 / 2
129  if (buf_size > INT_MAX/8)
130  return -1;
131  if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
132  return ret;
133  c->width = width;
134  c->height = height;
136  buf_size);
137  if (!c->decomp_buf) {
138  av_log(avctx, AV_LOG_ERROR,
139  "Can't allocate decompression buffer.\n");
140  return AVERROR(ENOMEM);
141  }
142  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
143  av_frame_unref(c->pic);
144  return 1;
145  } else if (quality != c->quality)
146  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
147 
148  return 0;
149 }
150 
151 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
152  AVPacket *avpkt)
153 {
154  const uint8_t *buf = avpkt->data;
155  int buf_size = avpkt->size;
156  NuvContext *c = avctx->priv_data;
157  AVFrame *picture = data;
158  int orig_size = buf_size;
159  int keyframe, ret;
160  int size_change = 0;
161  int minsize = 0;
162  int result, init_frame = !avctx->frame_number;
163  enum {
164  NUV_UNCOMPRESSED = '0',
165  NUV_RTJPEG = '1',
166  NUV_RTJPEG_IN_LZO = '2',
167  NUV_LZO = '3',
168  NUV_BLACK = 'N',
169  NUV_COPY_LAST = 'L'
170  } comptype;
171 
172  if (buf_size < 12) {
173  av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
174  return AVERROR_INVALIDDATA;
175  }
176 
177  // codec data (rtjpeg quant tables)
178  if (buf[0] == 'D' && buf[1] == 'R') {
179  int ret;
180  // skip rest of the frameheader.
181  buf = &buf[12];
182  buf_size -= 12;
183  ret = get_quant(avctx, c, buf, buf_size);
184  if (ret < 0)
185  return ret;
186  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
187  return orig_size;
188  }
189 
190  if (buf_size < 12 || buf[0] != 'V') {
191  av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
192  return AVERROR_INVALIDDATA;
193  }
194  comptype = buf[1];
195  switch (comptype) {
196  case NUV_RTJPEG_IN_LZO:
197  case NUV_RTJPEG:
198  keyframe = !buf[2];
199  if (c->width < 16 || c->height < 16) {
200  return AVERROR_INVALIDDATA;
201  }
202  break;
203  case NUV_COPY_LAST:
204  keyframe = 0;
205  break;
206  default:
207  keyframe = 1;
208  break;
209  }
210  switch (comptype) {
211  case NUV_UNCOMPRESSED:
212  minsize = c->width * c->height * 3 / 2;
213  break;
214  case NUV_RTJPEG:
215  minsize = c->width/16 * (c->height/16) * 6;
216  break;
217  case NUV_BLACK:
218  case NUV_COPY_LAST:
219  case NUV_LZO:
220  case NUV_RTJPEG_IN_LZO:
221  break;
222  default:
223  av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
224  return AVERROR_INVALIDDATA;
225  }
226  if (buf_size < minsize / 4)
227  return AVERROR_INVALIDDATA;
228 retry:
229  // skip rest of the frameheader.
230  buf = &buf[12];
231  buf_size -= 12;
232  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
234  int inlen = buf_size;
235  if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen)) {
236  av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
237  return AVERROR_INVALIDDATA;
238  }
239  buf = c->decomp_buf;
241  memset(c->decomp_buf + buf_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
242  }
243  if (c->codec_frameheader) {
244  int w, h, q;
245  if (buf_size < RTJPEG_HEADER_SIZE) {
246  av_log(avctx, AV_LOG_ERROR, "Too small NUV video frame\n");
247  return AVERROR_INVALIDDATA;
248  }
249  // There seem to exist two variants of this header: one starts with 'V'
250  // and 5 bytes unknown, the other matches current MythTV and is 4 bytes size,
251  // 1 byte header size (== 12), 1 byte version (== 0)
252  if (buf[0] != 'V' && AV_RL16(&buf[4]) != 0x000c) {
253  av_log(avctx, AV_LOG_ERROR, "Unknown secondary frame header (wrong codec_tag?)\n");
254  return AVERROR_INVALIDDATA;
255  }
256  w = AV_RL16(&buf[6]);
257  h = AV_RL16(&buf[8]);
258  q = buf[10];
259  if ((result = codec_reinit(avctx, w, h, q)) < 0)
260  return result;
261  if (result) {
262  buf = avpkt->data;
263  buf_size = avpkt->size;
264  size_change = 1;
265  goto retry;
266  }
267  buf = &buf[RTJPEG_HEADER_SIZE];
268  buf_size -= RTJPEG_HEADER_SIZE;
269  }
270 
271  if (size_change || keyframe) {
272  av_frame_unref(c->pic);
273  init_frame = 1;
274  }
275 
276  if ((result = ff_reget_buffer(avctx, c->pic)) < 0)
277  return result;
278  if (init_frame) {
279  memset(c->pic->data[0], 0, avctx->height * c->pic->linesize[0]);
280  memset(c->pic->data[1], 0x80, avctx->height * c->pic->linesize[1] / 2);
281  memset(c->pic->data[2], 0x80, avctx->height * c->pic->linesize[2] / 2);
282  }
283 
285  c->pic->key_frame = keyframe;
286  // decompress/copy/whatever data
287  switch (comptype) {
288  case NUV_LZO:
289  case NUV_UNCOMPRESSED: {
290  int height = c->height;
291  if (buf_size < c->width * height * 3 / 2) {
292  av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
293  height = buf_size / c->width / 3 * 2;
294  }
295  if(height > 0)
296  copy_frame(c->pic, buf, c->width, height);
297  break;
298  }
299  case NUV_RTJPEG_IN_LZO:
300  case NUV_RTJPEG:
301  ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, c->pic, buf, buf_size);
302  if (ret < 0)
303  return ret;
304  break;
305  case NUV_BLACK:
306  memset(c->pic->data[0], 0, c->width * c->height);
307  memset(c->pic->data[1], 128, c->width * c->height / 4);
308  memset(c->pic->data[2], 128, c->width * c->height / 4);
309  break;
310  case NUV_COPY_LAST:
311  /* nothing more to do here */
312  break;
313  }
314 
315  if ((result = av_frame_ref(picture, c->pic)) < 0)
316  return result;
317 
318  *got_frame = 1;
319  return orig_size;
320 }
321 
323 {
324  NuvContext *c = avctx->priv_data;
325  int ret;
326 
327  c->pic = av_frame_alloc();
328  if (!c->pic)
329  return AVERROR(ENOMEM);
330 
331  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
332  c->decomp_buf = NULL;
333  c->quality = -1;
334  c->width = 0;
335  c->height = 0;
336 
337  c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
338 
339  if (avctx->extradata_size)
340  get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
341 
342  ff_rtjpeg_init(&c->rtj, avctx);
343 
344  if ((ret = codec_reinit(avctx, avctx->width, avctx->height, -1)) < 0)
345  return ret;
346 
347  return 0;
348 }
349 
351 {
352  NuvContext *c = avctx->priv_data;
353 
354  av_freep(&c->decomp_buf);
355  av_frame_free(&c->pic);
356 
357  return 0;
358 }
359 
361  .name = "nuv",
362  .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
363  .type = AVMEDIA_TYPE_VIDEO,
364  .id = AV_CODEC_ID_NUV,
365  .priv_data_size = sizeof(NuvContext),
366  .init = decode_init,
367  .close = decode_end,
368  .decode = decode_frame,
369  .capabilities = AV_CODEC_CAP_DR1,
370 };
#define NULL
Definition: coverity.c:32
static av_cold int decode_end(AVCodecContext *avctx)
Definition: nuv.c:350
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int width
Definition: nuv.c:40
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
int height
Definition: nuv.c:40
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
misc image utilities
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:216
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: avcodec.h:1434
static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
extract quantization tables from codec data into our context
Definition: nuv.c:86
int codec_frameheader
Definition: nuv.c:38
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1732
#define AV_RL16
Definition: intreadwrite.h:42
static void get_quant_quality(NuvContext *c, int quality)
set quantization tables from a quality value
Definition: nuv.c:104
static const uint8_t fallback_lquant[]
Definition: nuv.c:47
Picture data structure.
Definition: avcodec.h:3754
AVCodec.
Definition: avcodec.h:3482
int avpicture_fill(AVPicture *picture, const uint8_t *ptr, enum AVPixelFormat pix_fmt, int width, int height)
Setup the picture fields based on the specified image parameters and the provided image data buffer...
Definition: avpicture.c:34
#define FFALIGN(x, a)
Definition: common.h:97
int quality
Definition: nuv.c:39
void av_picture_copy(AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height)
Copy image src to dst.
Definition: avpicture.c:72
Definition: nuv.c:36
uint8_t
#define av_cold
Definition: attributes.h:74
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
int ff_rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f, const uint8_t *buf, int buf_size)
decode one rtjpeg YUV420 frame
Definition: rtjpeg.c:106
void ff_rtjpeg_init(RTJpegContext *c, AVCodecContext *avctx)
Definition: rtjpeg.c:170
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:366
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1627
uint8_t * data
Definition: avcodec.h:1433
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#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:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:178
const char * name
Name of the codec implementation.
Definition: avcodec.h:3489
#define FFMAX(a, b)
Definition: common.h:90
Libavcodec external API header.
static av_cold int decode_init(AVCodecContext *avctx)
Definition: nuv.c:322
AVCodec ff_nuv_decoder
Definition: nuv.c:360
unsigned char * decomp_buf
Definition: nuv.c:42
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:1097
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
int width
picture width / height.
Definition: avcodec.h:1691
void ff_rtjpeg_decode_init(RTJpegContext *c, int width, int height, const uint32_t *lquant, const uint32_t *cquant)
initialize an RTJpegContext, may be called multiple times
Definition: rtjpeg.c:158
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
#define AV_RL32
Definition: intreadwrite.h:146
AVS_Value src
Definition: avisynth_c.h:482
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
main external API structure.
Definition: avcodec.h:1512
static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
copy frame data from buffer to AVFrame, handling stride.
Definition: nuv.c:76
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1544
void * buf
Definition: avisynth_c.h:553
int extradata_size
Definition: avcodec.h:1628
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
byte swapping routines
unsigned int decomp_size
Definition: nuv.c:41
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:465
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
static const uint8_t fallback_cquant[]
Definition: nuv.c:58
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:521
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:511
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:67
common internal api header.
common internal and external API header
static double c[64]
AVFrame * pic
Definition: nuv.c:37
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:636
void * priv_data
Definition: avcodec.h:1554
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
Definition: nuv.c:114
uint32_t lq[64]
Definition: nuv.c:43
#define RTJPEG_HEADER_SIZE
Definition: rtjpeg.h:31
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2303
#define av_freep(p)
static void init_frame(FlacEncodeContext *s, int nb_samples)
Definition: flacenc.c:446
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: nuv.c:151
RTJpegContext rtj
Definition: nuv.c:44
#define MKTAG(a, b, c, d)
Definition: common.h:341
This structure stores compressed data.
Definition: avcodec.h:1410
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:857
uint32_t cq[64]
Definition: nuv.c:43
Predicted.
Definition: avutil.h:267
static int width