FFmpeg  2.1.1
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/lzo.h"
29 #include "libavutil/imgutils.h"
30 #include "avcodec.h"
31 #include "internal.h"
32 #include "rtjpeg.h"
33 
34 typedef struct {
37  int quality;
38  int width, height;
39  unsigned int decomp_size;
40  unsigned char *decomp_buf;
41  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 
68 /**
69  * @brief copy frame data from buffer to AVFrame, handling stride.
70  * @param f destination AVFrame
71  * @param src source buffer, does not use any line-stride
72  * @param width width of the video frame
73  * @param height height of the video frame
74  */
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 
82 /**
83  * @brief extract quantization tables from codec data into our context
84  */
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 
100 /**
101  * @brief set quantization tables from a quality value
102  */
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  // also reserve space for a possible additional header
125  int buf_size = height * width * 3 / 2
128  if (buf_size > INT_MAX/8)
129  return -1;
130  if ((ret = av_image_check_size(height, width, 0, avctx)) < 0)
131  return ret;
132  avctx->width = c->width = width;
133  avctx->height = c->height = height;
135  buf_size);
136  if (!c->decomp_buf) {
137  av_log(avctx, AV_LOG_ERROR,
138  "Can't allocate decompression buffer.\n");
139  return AVERROR(ENOMEM);
140  }
141  ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height,
142  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->dsp, c->width, c->height,
147  c->lq, c->cq);
148 
149  return 0;
150 }
151 
152 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
153  AVPacket *avpkt)
154 {
155  const uint8_t *buf = avpkt->data;
156  int buf_size = avpkt->size;
157  NuvContext *c = avctx->priv_data;
158  AVFrame *picture = data;
159  int orig_size = buf_size;
160  int keyframe, ret;
161  int size_change = 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->dsp, c->width, c->height, c->lq,
187  c->cq);
188  return orig_size;
189  }
190 
191  if (buf_size < 12 || buf[0] != 'V') {
192  av_log(avctx, AV_LOG_ERROR, "not a nuv video frame\n");
193  return AVERROR_INVALIDDATA;
194  }
195  comptype = buf[1];
196  switch (comptype) {
197  case NUV_RTJPEG_IN_LZO:
198  case NUV_RTJPEG:
199  keyframe = !buf[2];
200  break;
201  case NUV_COPY_LAST:
202  keyframe = 0;
203  break;
204  default:
205  keyframe = 1;
206  break;
207  }
208 retry:
209  // skip rest of the frameheader.
210  buf = &buf[12];
211  buf_size -= 12;
212  if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
214  int inlen = buf_size;
215  if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen)) {
216  av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
217  return AVERROR_INVALIDDATA;
218  }
219  buf = c->decomp_buf;
221  }
222  if (c->codec_frameheader) {
223  int w, h, q;
224  if (buf_size < RTJPEG_HEADER_SIZE) {
225  av_log(avctx, AV_LOG_ERROR, "Too small NUV video frame\n");
226  return AVERROR_INVALIDDATA;
227  }
228  // There seem to exist two variants of this header: one starts with 'V'
229  // and 5 bytes unknown, the other matches current MythTV and is 4 bytes size,
230  // 1 byte header size (== 12), 1 byte version (== 0)
231  if (buf[0] != 'V' && AV_RL16(&buf[4]) != 0x000c) {
232  av_log(avctx, AV_LOG_ERROR, "Unknown secondary frame header (wrong codec_tag?)\n");
233  return AVERROR_INVALIDDATA;
234  }
235  w = AV_RL16(&buf[6]);
236  h = AV_RL16(&buf[8]);
237  q = buf[10];
238  if ((result = codec_reinit(avctx, w, h, q)) < 0)
239  return result;
240  if (result) {
241  buf = avpkt->data;
242  buf_size = avpkt->size;
243  size_change = 1;
244  goto retry;
245  }
246  buf = &buf[RTJPEG_HEADER_SIZE];
247  buf_size -= RTJPEG_HEADER_SIZE;
248  }
249 
250  if (size_change || keyframe) {
251  av_frame_unref(&c->pic);
252  init_frame = 1;
253  }
254 
255  if ((result = ff_reget_buffer(avctx, &c->pic)) < 0)
256  return result;
257  if (init_frame) {
258  memset(c->pic.data[0], 0, avctx->height * c->pic.linesize[0]);
259  memset(c->pic.data[1], 0x80, avctx->height * c->pic.linesize[1] / 2);
260  memset(c->pic.data[2], 0x80, avctx->height * c->pic.linesize[2] / 2);
261  }
262 
264  c->pic.key_frame = keyframe;
265  // decompress/copy/whatever data
266  switch (comptype) {
267  case NUV_LZO:
268  case NUV_UNCOMPRESSED: {
269  int height = c->height;
270  if (buf_size < c->width * height * 3 / 2) {
271  av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
272  height = buf_size / c->width / 3 * 2;
273  }
274  if(height > 0)
275  copy_frame(&c->pic, buf, c->width, height);
276  break;
277  }
278  case NUV_RTJPEG_IN_LZO:
279  case NUV_RTJPEG:
280  ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
281  if (ret < 0)
282  return ret;
283  break;
284  case NUV_BLACK:
285  memset(c->pic.data[0], 0, c->width * c->height);
286  memset(c->pic.data[1], 128, c->width * c->height / 4);
287  memset(c->pic.data[2], 128, c->width * c->height / 4);
288  break;
289  case NUV_COPY_LAST:
290  /* nothing more to do here */
291  break;
292  default:
293  av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
294  return AVERROR_INVALIDDATA;
295  }
296 
297  if ((result = av_frame_ref(picture, &c->pic)) < 0)
298  return result;
299 
300  *got_frame = 1;
301  return orig_size;
302 }
303 
305 {
306  NuvContext *c = avctx->priv_data;
307  int ret;
308 
309  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
310  c->pic.data[0] = NULL;
311  c->decomp_buf = NULL;
312  c->quality = -1;
313  c->width = 0;
314  c->height = 0;
315 
316  c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
317 
318  if (avctx->extradata_size)
319  get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
320 
321  ff_dsputil_init(&c->dsp, avctx);
322 
323  if ((ret = codec_reinit(avctx, avctx->width, avctx->height, -1)) < 0)
324  return ret;
325 
326  return 0;
327 }
328 
330 {
331  NuvContext *c = avctx->priv_data;
332 
333  av_freep(&c->decomp_buf);
334  av_frame_unref(&c->pic);
335 
336  return 0;
337 }
338 
340  .name = "nuv",
341  .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo/RTJPEG"),
342  .type = AVMEDIA_TYPE_VIDEO,
343  .id = AV_CODEC_ID_NUV,
344  .priv_data_size = sizeof(NuvContext),
345  .init = decode_init,
346  .close = decode_end,
347  .decode = decode_frame,
348  .capabilities = CODEC_CAP_DR1,
349 };
av_cold void ff_dsputil_init(DSPContext *c, AVCodecContext *avctx)
Definition: dsputil.c:2678
static av_cold int decode_end(AVCodecContext *avctx)
Definition: nuv.c:329
int width
Definition: nuv.c:38
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
int height
Definition: nuv.c:38
AVFrame pic
Definition: nuv.c:35
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define AV_RL16(x)
Definition: intreadwrite.h:245
int size
Definition: avcodec.h:1064
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
DSPContext dsp
Definition: nuv.c:43
int codec_frameheader
Definition: nuv.c:36
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1342
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
Picture data structure.
Definition: avcodec.h:3121
AVCodec.
Definition: avcodec.h:2922
#define av_cold
Definition: avcodec.h:653
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
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1254
int quality
Definition: nuv.c:37
Predicted.
Definition: avcodec.h:2305
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
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:34
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: utils.c:153
uint8_t
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
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
const char * name
Name of the codec implementation.
Definition: avcodec.h:2929
int av_frame_ref(AVFrame *dst, AVFrame *src)
Setup a new reference to the data described by a given frame.
Definition: frame.c:247
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:742
const char data[16]
Definition: mxf.c:68
void ff_rtjpeg_decode_init(RTJpegContext *c, DSPContext *dsp, int width, int height, const uint32_t *lquant, const uint32_t *cquant)
initialize an RTJpegContext, may be called multiple times
Definition: rtjpeg.c:159
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
Libavcodec external API header.
static av_cold int decode_init(AVCodecContext *avctx)
Definition: nuv.c:304
AVCodec ff_nuv_decoder
Definition: nuv.c:339
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:580
unsigned char * decomp_buf
Definition: nuv.c:40
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:231
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:986
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:167
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:351
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:126
planar YUV 4:2:0, 12bpp, (1 Cr &amp; Cb sample per 2x2 Y samples)
Definition: avcodec.h:4534
static int width
Definition: utils.c:158
AVS_Value src
Definition: avisynth_c.h:523
#define FFMAX(a, b)
Definition: avcodec.h:923
main external API structure.
Definition: avcodec.h:1146
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
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 &quot;ABCD&quot; -&gt; (&#39;D&#39;&lt;&lt;24) + (&#39;C&#39;&lt;&lt;16) + (&#39;B&#39;&lt;&lt;8) + &#39;A&#39;).
Definition: avcodec.h:1172
void * buf
Definition: avisynth_c.h:594
int extradata_size
Definition: avcodec.h:1255
BYTE int const BYTE int int int height
Definition: avisynth_c.h:713
#define MKTAG(a, b, c, d)
uint8_t * data
Definition: avcodec.h:1063
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
unsigned int decomp_size
Definition: nuv.c:39
void * priv_data
Definition: avcodec.h:1182
static const uint8_t fallback_cquant[]
Definition: nuv.c:57
common internal api header.
static double c[64]
#define FFALIGN(x, a)
Definition: avcodec.h:930
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
Definition: nuv.c:113
uint32_t lq[64]
Definition: nuv.c:41
#define RTJPEG_HEADER_SIZE
Definition: rtjpeg.h:30
#define AVERROR_INVALIDDATA
#define AV_RL32(x)
Definition: intreadwrite.h:275
int key_frame
1 -&gt; keyframe, 0-&gt; not
Definition: frame.h:162
#define AVERROR(e)
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1904
static void init_frame(FlacEncodeContext *s, int nb_samples)
Definition: flacenc.c:437
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: nuv.c:152
RTJpegContext rtj
Definition: nuv.c:42
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
This structure stores compressed data.
Definition: avcodec.h:1040
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:107
uint32_t cq[64]
Definition: nuv.c:41
DSPContext.
Definition: dsputil.h:124