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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  int buf_size = height * width * 3 / 2
129  if (buf_size > INT_MAX/8)
130  return -1;
131  if ((ret = av_image_check_size(height, width, 0, avctx)) < 0)
132  return ret;
133  avctx->width = c->width = width;
134  avctx->height = 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 result, init_frame = !avctx->frame_number;
162  enum {
163  NUV_UNCOMPRESSED = '0',
164  NUV_RTJPEG = '1',
165  NUV_RTJPEG_IN_LZO = '2',
166  NUV_LZO = '3',
167  NUV_BLACK = 'N',
168  NUV_COPY_LAST = 'L'
169  } comptype;
170 
171  if (buf_size < 12) {
172  av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
173  return AVERROR_INVALIDDATA;
174  }
175 
176  // codec data (rtjpeg quant tables)
177  if (buf[0] == 'D' && buf[1] == 'R') {
178  int ret;
179  // skip rest of the frameheader.
180  buf = &buf[12];
181  buf_size -= 12;
182  ret = get_quant(avctx, c, buf, buf_size);
183  if (ret < 0)
184  return ret;
185  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
186  return orig_size;
187  }
188 
189  if (buf_size < 12 || buf[0] != 'V') {
190  av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
191  return AVERROR_INVALIDDATA;
192  }
193  comptype = buf[1];
194  switch (comptype) {
195  case NUV_RTJPEG_IN_LZO:
196  case NUV_RTJPEG:
197  keyframe = !buf[2];
198  break;
199  case NUV_COPY_LAST:
200  keyframe = 0;
201  break;
202  default:
203  keyframe = 1;
204  break;
205  }
206 retry:
207  // skip rest of the frameheader.
208  buf = &buf[12];
209  buf_size -= 12;
210  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
212  int inlen = buf_size;
213  if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen)) {
214  av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
215  return AVERROR_INVALIDDATA;
216  }
217  buf = c->decomp_buf;
219  memset(c->decomp_buf + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
220  }
221  if (c->codec_frameheader) {
222  int w, h, q;
223  if (buf_size < RTJPEG_HEADER_SIZE) {
224  av_log(avctx, AV_LOG_ERROR, "Too small NUV video frame\n");
225  return AVERROR_INVALIDDATA;
226  }
227  // There seem to exist two variants of this header: one starts with 'V'
228  // and 5 bytes unknown, the other matches current MythTV and is 4 bytes size,
229  // 1 byte header size (== 12), 1 byte version (== 0)
230  if (buf[0] != 'V' && AV_RL16(&buf[4]) != 0x000c) {
231  av_log(avctx, AV_LOG_ERROR, "Unknown secondary frame header (wrong codec_tag?)\n");
232  return AVERROR_INVALIDDATA;
233  }
234  w = AV_RL16(&buf[6]);
235  h = AV_RL16(&buf[8]);
236  q = buf[10];
237  if ((result = codec_reinit(avctx, w, h, q)) < 0)
238  return result;
239  if (result) {
240  buf = avpkt->data;
241  buf_size = avpkt->size;
242  size_change = 1;
243  goto retry;
244  }
245  buf = &buf[RTJPEG_HEADER_SIZE];
246  buf_size -= RTJPEG_HEADER_SIZE;
247  }
248 
249  if (size_change || keyframe) {
250  av_frame_unref(c->pic);
251  init_frame = 1;
252  }
253 
254  if ((result = ff_reget_buffer(avctx, c->pic)) < 0)
255  return result;
256  if (init_frame) {
257  memset(c->pic->data[0], 0, avctx->height * c->pic->linesize[0]);
258  memset(c->pic->data[1], 0x80, avctx->height * c->pic->linesize[1] / 2);
259  memset(c->pic->data[2], 0x80, avctx->height * c->pic->linesize[2] / 2);
260  }
261 
263  c->pic->key_frame = keyframe;
264  // decompress/copy/whatever data
265  switch (comptype) {
266  case NUV_LZO:
267  case NUV_UNCOMPRESSED: {
268  int height = c->height;
269  if (buf_size < c->width * height * 3 / 2) {
270  av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
271  height = buf_size / c->width / 3 * 2;
272  }
273  if(height > 0)
274  copy_frame(c->pic, buf, c->width, height);
275  break;
276  }
277  case NUV_RTJPEG_IN_LZO:
278  case NUV_RTJPEG:
279  ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, c->pic, buf, buf_size);
280  if (ret < 0)
281  return ret;
282  break;
283  case NUV_BLACK:
284  memset(c->pic->data[0], 0, c->width * c->height);
285  memset(c->pic->data[1], 128, c->width * c->height / 4);
286  memset(c->pic->data[2], 128, c->width * c->height / 4);
287  break;
288  case NUV_COPY_LAST:
289  /* nothing more to do here */
290  break;
291  default:
292  av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
293  return AVERROR_INVALIDDATA;
294  }
295 
296  if ((result = av_frame_ref(picture, c->pic)) < 0)
297  return result;
298 
299  *got_frame = 1;
300  return orig_size;
301 }
302 
304 {
305  NuvContext *c = avctx->priv_data;
306  int ret;
307 
308  c->pic = av_frame_alloc();
309  if (!c->pic)
310  return AVERROR(ENOMEM);
311 
312  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
313  c->decomp_buf = NULL;
314  c->quality = -1;
315  c->width = 0;
316  c->height = 0;
317 
318  c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
319 
320  if (avctx->extradata_size)
321  get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
322 
323  ff_rtjpeg_init(&c->rtj, avctx);
324 
325  if ((ret = codec_reinit(avctx, avctx->width, avctx->height, -1)) < 0)
326  return ret;
327 
328  return 0;
329 }
330 
332 {
333  NuvContext *c = avctx->priv_data;
334 
335  av_freep(&c->decomp_buf);
336  av_frame_free(&c->pic);
337 
338  return 0;
339 }
340 
342  .name = "nuv",
343  .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
344  .type = AVMEDIA_TYPE_VIDEO,
345  .id = AV_CODEC_ID_NUV,
346  .priv_data_size = sizeof(NuvContext),
347  .init = decode_init,
348  .close = decode_end,
349  .decode = decode_frame,
350  .capabilities = CODEC_CAP_DR1,
351 };
#define NULL
Definition: coverity.c:32
static av_cold int decode_end(AVCodecContext *avctx)
Definition: nuv.c:331
#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
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: avcodec.h:1163
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:1444
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:3452
AVCodec.
Definition: avcodec.h:3181
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:85
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:71
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:363
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1355
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:789
uint8_t * data
Definition: avcodec.h:1162
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:175
const char * name
Name of the codec implementation.
Definition: avcodec.h:3188
#define FFMAX(a, b)
Definition: common.h:64
Libavcodec external API header.
static av_cold int decode_init(AVCodecContext *avctx)
Definition: nuv.c:303
AVCodec ff_nuv_decoder
Definition: nuv.c:341
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:630
unsigned char * decomp_buf
Definition: nuv.c:42
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:241
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:1082
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1414
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
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:1241
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:1273
void * buf
Definition: avisynth_c.h:553
int extradata_size
Definition: avcodec.h:1356
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:462
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:522
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:513
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
common internal api header.
common internal and external API header
static double c[64]
AVFrame * pic
Definition: nuv.c:37
void * priv_data
Definition: avcodec.h:1283
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:2016
#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:315
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:85
This structure stores compressed data.
Definition: avcodec.h:1139
uint32_t cq[64]
Definition: nuv.c:43
Predicted.
Definition: avutil.h:268
static int width