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 {
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  AVPicture pic;
78  avpicture_fill(&pic, src, AV_PIX_FMT_YUV420P, width, height);
79  av_picture_copy((AVPicture *)f, &pic, AV_PIX_FMT_YUV420P, width, height);
80 }
81 
85 static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf,
86  int size)
87 {
88  int i;
89  if (size < 2 * 64 * 4) {
90  av_log(avctx, AV_LOG_ERROR, "insufficient rtjpeg quant data\n");
91  return AVERROR_INVALIDDATA;
92  }
93  for (i = 0; i < 64; i++, buf += 4)
94  c->lq[i] = AV_RL32(buf);
95  for (i = 0; i < 64; i++, buf += 4)
96  c->cq[i] = AV_RL32(buf);
97  return 0;
98 }
99 
103 static void get_quant_quality(NuvContext *c, int quality)
104 {
105  int i;
106  quality = FFMAX(quality, 1);
107  for (i = 0; i < 64; i++) {
108  c->lq[i] = (fallback_lquant[i] << 7) / quality;
109  c->cq[i] = (fallback_cquant[i] << 7) / quality;
110  }
111 }
112 
113 static int codec_reinit(AVCodecContext *avctx, int width, int height,
114  int quality)
115 {
116  NuvContext *c = avctx->priv_data;
117  int ret;
118 
119  width = FFALIGN(width, 2);
120  height = FFALIGN(height, 2);
121  if (quality >= 0)
122  get_quant_quality(c, quality);
123  if (width != c->width || height != c->height) {
124  void *ptr;
125  if ((ret = av_image_check_size(height, width, 0, avctx)) < 0)
126  return ret;
127  avctx->width = c->width = width;
128  avctx->height = c->height = height;
129  ptr = av_fast_realloc(c->decomp_buf, &c->decomp_size,
130  c->height * c->width * 3 / 2 +
133  if (!ptr) {
134  av_log(avctx, AV_LOG_ERROR,
135  "Can't allocate decompression buffer.\n");
136  return AVERROR(ENOMEM);
137  } else
138  c->decomp_buf = ptr;
139  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
140  av_frame_unref(c->pic);
141  } else if (quality != c->quality)
142  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
143 
144  return 0;
145 }
146 
147 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
148  AVPacket *avpkt)
149 {
150  const uint8_t *buf = avpkt->data;
151  int buf_size = avpkt->size;
152  NuvContext *c = avctx->priv_data;
153  AVFrame *picture = data;
154  int orig_size = buf_size;
155  int keyframe, ret;
156  int result, init_frame = !avctx->frame_number;
157  enum {
158  NUV_UNCOMPRESSED = '0',
159  NUV_RTJPEG = '1',
160  NUV_RTJPEG_IN_LZO = '2',
161  NUV_LZO = '3',
162  NUV_BLACK = 'N',
163  NUV_COPY_LAST = 'L'
164  } comptype;
165 
166  if (buf_size < 12) {
167  av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
168  return AVERROR_INVALIDDATA;
169  }
170 
171  // codec data (rtjpeg quant tables)
172  if (buf[0] == 'D' && buf[1] == 'R') {
173  int ret;
174  // skip rest of the frameheader.
175  buf = &buf[12];
176  buf_size -= 12;
177  ret = get_quant(avctx, c, buf, buf_size);
178  if (ret < 0)
179  return ret;
180  ff_rtjpeg_decode_init(&c->rtj, c->width, c->height, c->lq, c->cq);
181  return orig_size;
182  }
183 
184  if (buf[0] != 'V' || buf_size < 12) {
185  av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
186  return AVERROR_INVALIDDATA;
187  }
188  comptype = buf[1];
189  switch (comptype) {
190  case NUV_RTJPEG_IN_LZO:
191  case NUV_RTJPEG:
192  keyframe = !buf[2];
193  break;
194  case NUV_COPY_LAST:
195  keyframe = 0;
196  break;
197  default:
198  keyframe = 1;
199  break;
200  }
201  // skip rest of the frameheader.
202  buf = &buf[12];
203  buf_size -= 12;
204  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
205  int outlen = c->decomp_size - FF_INPUT_BUFFER_PADDING_SIZE;
206  int inlen = buf_size;
207  if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen)) {
208  av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
209  return AVERROR_INVALIDDATA;
210  }
211  buf = c->decomp_buf;
212  buf_size = outlen;
213  }
214  if (c->codec_frameheader) {
215  int w, h, q;
216  if (buf_size < RTJPEG_HEADER_SIZE || buf[4] != RTJPEG_HEADER_SIZE ||
217  buf[5] != RTJPEG_FILE_VERSION) {
218  av_log(avctx, AV_LOG_ERROR, "invalid nuv video frame\n");
219  return AVERROR_INVALIDDATA;
220  }
221  w = AV_RL16(&buf[6]);
222  h = AV_RL16(&buf[8]);
223  q = buf[10];
224  if ((result = codec_reinit(avctx, w, h, q)) < 0)
225  return result;
226  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO)
227  buf = c->decomp_buf;
228  buf = &buf[RTJPEG_HEADER_SIZE];
229  buf_size -= RTJPEG_HEADER_SIZE;
230  }
231 
232  if (keyframe) {
233  av_frame_unref(c->pic);
234  init_frame = 1;
235  }
236 
237  result = ff_reget_buffer(avctx, c->pic);
238  if (result < 0) {
239  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
240  return result;
241  }
242  if (init_frame) {
243  memset(c->pic->data[0], 0, avctx->height * c->pic->linesize[0]);
244  memset(c->pic->data[1], 0x80, avctx->height * c->pic->linesize[1] / 2);
245  memset(c->pic->data[2], 0x80, avctx->height * c->pic->linesize[2] / 2);
246  }
247 
249  c->pic->key_frame = keyframe;
250  // decompress/copy/whatever data
251  switch (comptype) {
252  case NUV_LZO:
253  case NUV_UNCOMPRESSED: {
254  int height = c->height;
255  if (buf_size < c->width * height * 3 / 2) {
256  av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
257  height = buf_size / c->width / 3 * 2;
258  }
259  copy_frame(c->pic, buf, c->width, height);
260  break;
261  }
262  case NUV_RTJPEG_IN_LZO:
263  case NUV_RTJPEG:
264  ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, c->pic, buf, buf_size);
265  if (ret < 0)
266  return ret;
267  break;
268  case NUV_BLACK:
269  memset(c->pic->data[0], 0, c->width * c->height);
270  memset(c->pic->data[1], 128, c->width * c->height / 4);
271  memset(c->pic->data[2], 128, c->width * c->height / 4);
272  break;
273  case NUV_COPY_LAST:
274  /* nothing more to do here */
275  break;
276  default:
277  av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
278  return AVERROR_INVALIDDATA;
279  }
280 
281  if ((result = av_frame_ref(picture, c->pic)) < 0)
282  return result;
283 
284  *got_frame = 1;
285  return orig_size;
286 }
287 
289 {
290  NuvContext *c = avctx->priv_data;
291  int ret;
292 
293  c->pic = av_frame_alloc();
294  if (!c->pic)
295  return AVERROR(ENOMEM);
296 
297  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
298  c->decomp_buf = NULL;
299  c->quality = -1;
300  c->width = 0;
301  c->height = 0;
302 
303  c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
304 
305  if (avctx->extradata_size)
306  get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
307 
308  ff_rtjpeg_init(&c->rtj, avctx);
309 
310  if ((ret = codec_reinit(avctx, avctx->width, avctx->height, -1)) < 0)
311  return ret;
312 
313  return 0;
314 }
315 
317 {
318  NuvContext *c = avctx->priv_data;
319 
320  av_freep(&c->decomp_buf);
321  av_frame_free(&c->pic);
322 
323  return 0;
324 }
325 
327  .name = "nuv",
328  .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
329  .type = AVMEDIA_TYPE_VIDEO,
330  .id = AV_CODEC_ID_NUV,
331  .priv_data_size = sizeof(NuvContext),
332  .init = decode_init,
333  .close = decode_end,
334  .decode = decode_frame,
335  .capabilities = CODEC_CAP_DR1,
336 };
static av_cold int decode_end(AVCodecContext *avctx)
Definition: nuv.c:316
#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:135
int height
Definition: nuv.c:39
int avpicture_fill(AVPicture *picture, uint8_t *ptr, enum AVPixelFormat pix_fmt, int width, int height)
Fill in the AVPicture fields.
Definition: avpicture.c:34
misc image utilities
#define RTJPEG_FILE_VERSION
Definition: rtjpeg.h:30
int size
Definition: avcodec.h:974
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:85
int codec_frameheader
Definition: nuv.c:37
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1270
#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:103
static const uint8_t fallback_lquant[]
Definition: nuv.c:46
four components are given, that's all.
Definition: avcodec.h:3042
AVCodec.
Definition: avcodec.h:2812
#define FFALIGN(x, a)
Definition: common.h:62
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:198
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:119
Definition: nuv.c:35
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
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:57
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:188
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:973
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
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:369
#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:69
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:2819
#define FFMAX(a, b)
Definition: common.h:55
static av_cold int decode_init(AVCodecContext *avctx)
Definition: nuv.c:288
AVCodec ff_nuv_decoder
Definition: nuv.c:326
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
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:222
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:808
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
int width
picture width / height.
Definition: avcodec.h:1229
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
NULL
Definition: eval.c:55
static int width
Definition: utils.c:156
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
main external API structure.
Definition: avcodec.h:1050
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
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" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1082
int extradata_size
Definition: avcodec.h:1165
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:283
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
static const uint8_t fallback_cquant[]
Definition: nuv.c:57
int height
Definition: gxfenc.c:72
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
common internal api header.
common internal and external API header
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
AVFrame * pic
Definition: nuv.c:36
void * priv_data
Definition: avcodec.h:1092
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
Definition: nuv.c:113
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:191
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1838
static void init_frame(FlacEncodeContext *s, int nb_samples)
Definition: flacenc.c:413
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: nuv.c:147
RTJpegContext rtj
Definition: nuv.c:43
#define MKTAG(a, b, c, d)
Definition: common.h:238
This structure stores compressed data.
Definition: avcodec.h:950
uint32_t cq[64]
Definition: nuv.c:42
Predicted.
Definition: avutil.h:254