Libav
nuv.c
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1 /*
2  * NuppelVideo decoder
3  * Copyright (c) 2006 Reimar Doeffinger
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 Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdio.h>
23 #include <stdlib.h>
24 
25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/lzo.h"
29 #include "libavutil/imgutils.h"
30 #include "avcodec.h"
31 #include "idctdsp.h"
32 #include "internal.h"
33 #include "rtjpeg.h"
34 
35 typedef struct NuvContext {
38  int quality;
39  int width, height;
40  unsigned int decomp_size;
41  unsigned char *decomp_buf;
42  uint32_t lq[64], cq[64];
44 } NuvContext;
45 
46 static const uint8_t fallback_lquant[] = {
47  16, 11, 10, 16, 24, 40, 51, 61,
48  12, 12, 14, 19, 26, 58, 60, 55,
49  14, 13, 16, 24, 40, 57, 69, 56,
50  14, 17, 22, 29, 51, 87, 80, 62,
51  18, 22, 37, 56, 68, 109, 103, 77,
52  24, 35, 55, 64, 81, 104, 113, 92,
53  49, 64, 78, 87, 103, 121, 120, 101,
54  72, 92, 95, 98, 112, 100, 103, 99
55 };
56 
57 static const uint8_t fallback_cquant[] = {
58  17, 18, 24, 47, 99, 99, 99, 99,
59  18, 21, 26, 66, 99, 99, 99, 99,
60  24, 26, 56, 99, 99, 99, 99, 99,
61  47, 66, 99, 99, 99, 99, 99, 99,
62  99, 99, 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 };
67 
75 static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
76 {
77  uint8_t *src_data[4];
78  int src_linesize[4];
79  av_image_fill_arrays(src_data, src_linesize, src,
80  f->format, width, height, 1);
81  av_image_copy(f->data, f->linesize, src_data, src_linesize,
82  f->format, width, height);
83 }
84 
88 static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf,
89  int size)
90 {
91  int i;
92  if (size < 2 * 64 * 4) {
93  av_log(avctx, AV_LOG_ERROR, "insufficient rtjpeg quant data\n");
94  return AVERROR_INVALIDDATA;
95  }
96  for (i = 0; i < 64; i++, buf += 4)
97  c->lq[i] = AV_RL32(buf);
98  for (i = 0; i < 64; i++, buf += 4)
99  c->cq[i] = AV_RL32(buf);
100  return 0;
101 }
102 
107 {
108  int i;
109  quality = FFMAX(quality, 1);
110  for (i = 0; i < 64; i++) {
111  c->lq[i] = (fallback_lquant[i] << 7) / quality;
112  c->cq[i] = (fallback_cquant[i] << 7) / quality;
113  }
114 }
115 
116 static int codec_reinit(AVCodecContext *avctx, int width, int height,
117  int quality)
118 {
119  NuvContext *c = avctx->priv_data;
120  int ret;
121 
122  width = FFALIGN(width, 2);
123  height = FFALIGN(height, 2);
124  if (quality >= 0)
125  get_quant_quality(c, quality);
126  if (width != c->width || height != c->height) {
127  void *ptr;
128  if ((ret = av_image_check_size(height, width, 0, avctx)) < 0)
129  return ret;
130  avctx->width = c->width = width;
131  avctx->height = c->height = height;
132  ptr = av_fast_realloc(c->decomp_buf, &c->decomp_size,
133  c->height * c->width * 3 / 2 +
136  if (!ptr) {
137  av_log(avctx, AV_LOG_ERROR,
138  "Can't allocate decompression buffer.\n");
139  return AVERROR(ENOMEM);
140  } else
141  c->decomp_buf = ptr;
142  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
143  av_frame_unref(c->pic);
144  } else if (quality != c->quality)
145  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
146 
147  return 0;
148 }
149 
150 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
151  AVPacket *avpkt)
152 {
153  const uint8_t *buf = avpkt->data;
154  int buf_size = avpkt->size;
155  NuvContext *c = avctx->priv_data;
156  AVFrame *picture = data;
157  int orig_size = buf_size;
158  int keyframe, ret;
159  int result, init_frame = !avctx->frame_number;
160  enum {
161  NUV_UNCOMPRESSED = '0',
162  NUV_RTJPEG = '1',
163  NUV_RTJPEG_IN_LZO = '2',
164  NUV_LZO = '3',
165  NUV_BLACK = 'N',
166  NUV_COPY_LAST = 'L'
167  } comptype;
168 
169  if (buf_size < 12) {
170  av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
171  return AVERROR_INVALIDDATA;
172  }
173 
174  // codec data (rtjpeg quant tables)
175  if (buf[0] == 'D' && buf[1] == 'R') {
176  int ret;
177  // Skip the rest of the frame header.
178  buf = &buf[12];
179  buf_size -= 12;
180  ret = get_quant(avctx, c, buf, buf_size);
181  if (ret < 0)
182  return ret;
183  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
184  return orig_size;
185  }
186 
187  if (buf[0] != 'V' || buf_size < 12) {
188  av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
189  return AVERROR_INVALIDDATA;
190  }
191  comptype = buf[1];
192  switch (comptype) {
193  case NUV_RTJPEG_IN_LZO:
194  case NUV_RTJPEG:
195  keyframe = !buf[2];
196  break;
197  case NUV_COPY_LAST:
198  keyframe = 0;
199  break;
200  default:
201  keyframe = 1;
202  break;
203  }
204  // Skip the rest of the frame header.
205  buf = &buf[12];
206  buf_size -= 12;
207  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
208  int outlen = c->decomp_size - AV_INPUT_BUFFER_PADDING_SIZE;
209  int inlen = buf_size;
210  if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen)) {
211  av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
212  return AVERROR_INVALIDDATA;
213  }
214  buf = c->decomp_buf;
215  buf_size = outlen;
216  }
217  if (c->codec_frameheader) {
218  int w, h, q;
219  if (buf_size < RTJPEG_HEADER_SIZE || buf[4] != RTJPEG_HEADER_SIZE ||
220  buf[5] != RTJPEG_FILE_VERSION) {
221  av_log(avctx, AV_LOG_ERROR, "invalid nuv video frame\n");
222  return AVERROR_INVALIDDATA;
223  }
224  w = AV_RL16(&buf[6]);
225  h = AV_RL16(&buf[8]);
226  q = buf[10];
227  if ((result = codec_reinit(avctx, w, h, q)) < 0)
228  return result;
229  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO)
230  buf = c->decomp_buf;
231  buf = &buf[RTJPEG_HEADER_SIZE];
232  buf_size -= RTJPEG_HEADER_SIZE;
233  }
234 
235  if (keyframe) {
236  av_frame_unref(c->pic);
237  init_frame = 1;
238  }
239 
240  result = ff_reget_buffer(avctx, c->pic);
241  if (result < 0) {
242  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
243  return result;
244  }
245  if (init_frame) {
246  memset(c->pic->data[0], 0, avctx->height * c->pic->linesize[0]);
247  memset(c->pic->data[1], 0x80, avctx->height * c->pic->linesize[1] / 2);
248  memset(c->pic->data[2], 0x80, avctx->height * c->pic->linesize[2] / 2);
249  }
250 
252  c->pic->key_frame = keyframe;
253  // decompress/copy/whatever data
254  switch (comptype) {
255  case NUV_LZO:
256  case NUV_UNCOMPRESSED: {
257  int height = c->height;
258  if (buf_size < c->width * height * 3 / 2) {
259  av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
260  height = buf_size / c->width / 3 * 2;
261  }
262  copy_frame(c->pic, buf, c->width, height);
263  break;
264  }
265  case NUV_RTJPEG_IN_LZO:
266  case NUV_RTJPEG:
267  ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, c->pic, buf, buf_size);
268  if (ret < 0)
269  return ret;
270  break;
271  case NUV_BLACK:
272  memset(c->pic->data[0], 0, c->width * c->height);
273  memset(c->pic->data[1], 128, c->width * c->height / 4);
274  memset(c->pic->data[2], 128, c->width * c->height / 4);
275  break;
276  case NUV_COPY_LAST:
277  /* nothing more to do here */
278  break;
279  default:
280  av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
281  return AVERROR_INVALIDDATA;
282  }
283 
284  if ((result = av_frame_ref(picture, c->pic)) < 0)
285  return result;
286 
287  *got_frame = 1;
288  return orig_size;
289 }
290 
292 {
293  NuvContext *c = avctx->priv_data;
294  int ret;
295 
296  c->pic = av_frame_alloc();
297  if (!c->pic)
298  return AVERROR(ENOMEM);
299 
300  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
301  c->decomp_buf = NULL;
302  c->quality = -1;
303  c->width = 0;
304  c->height = 0;
305 
306  c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
307 
308  if (avctx->extradata_size)
309  get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
310 
311  ff_rtjpeg_init(&c->rtj, avctx);
312 
313  if ((ret = codec_reinit(avctx, avctx->width, avctx->height, -1)) < 0)
314  return ret;
315 
316  return 0;
317 }
318 
320 {
321  NuvContext *c = avctx->priv_data;
322 
323  av_freep(&c->decomp_buf);
324  av_frame_free(&c->pic);
325 
326  return 0;
327 }
328 
330  .name = "nuv",
331  .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
332  .type = AVMEDIA_TYPE_VIDEO,
333  .id = AV_CODEC_ID_NUV,
334  .priv_data_size = sizeof(NuvContext),
335  .init = decode_init,
336  .close = decode_end,
337  .decode = decode_frame,
338  .capabilities = AV_CODEC_CAP_DR1,
339 };
static av_cold int decode_end(AVCodecContext *avctx)
Definition: nuv.c:319
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int width
Definition: nuv.c:39
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
int height
Definition: nuv.c:39
misc image utilities
#define RTJPEG_FILE_VERSION
Definition: rtjpeg.h:30
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)
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
Setup the data pointers and linesizes based on the specified image parameters and the provided array...
Definition: imgutils.c:303
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:88
int codec_frameheader
Definition: nuv.c:37
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1621
#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:106
static const uint8_t fallback_lquant[]
Definition: nuv.c:46
AVCodec.
Definition: avcodec.h:3120
int quality
Definition: nuv.c:38
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:202
Definition: nuv.c:35
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
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:199
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1523
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:1346
#define FFALIGN(x, a)
Definition: macros.h:48
#define src
Definition: vp8dsp.c:254
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
Definition: mem.c:375
#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
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
#define FFMAX(a, b)
Definition: common.h:64
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:268
static av_cold int decode_init(AVCodecContext *avctx)
Definition: nuv.c:291
AVCodec ff_nuv_decoder
Definition: nuv.c:329
unsigned char * decomp_buf
Definition: nuv.c:41
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:223
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
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
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
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
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:191
NULL
Definition: eval.c:55
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
main external API structure.
Definition: avcodec.h:1409
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:75
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:1441
int extradata_size
Definition: avcodec.h:1524
byte swapping routines
unsigned int decomp_size
Definition: nuv.c:40
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:302
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
static const uint8_t fallback_cquant[]
Definition: nuv.c:57
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:59
common internal api header.
common internal and external API header
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
AVFrame * pic
Definition: nuv.c:36
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:638
void * priv_data
Definition: avcodec.h:1451
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
Definition: nuv.c:116
uint32_t lq[64]
Definition: nuv.c:42
#define RTJPEG_HEADER_SIZE
Definition: rtjpeg.h:31
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:196
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2183
static void init_frame(FlacEncodeContext *s, int nb_samples)
Definition: flacenc.c:436
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: nuv.c:150
RTJpegContext rtj
Definition: nuv.c:43
#define MKTAG(a, b, c, d)
Definition: common.h:256
This structure stores compressed data.
Definition: avcodec.h:1323
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:838
uint32_t cq[64]
Definition: nuv.c:42
Predicted.
Definition: avutil.h:261