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indeo2.c
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1 /*
2  * Intel Indeo 2 codec
3  * Copyright (c) 2005 Konstantin Shishkov
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 /**
23  * @file
24  * Intel Indeo 2 decoder.
25  */
26 
27 #include "libavutil/attributes.h"
28 
29 #define BITSTREAM_READER_LE
30 #include "avcodec.h"
31 #include "get_bits.h"
32 #include "indeo2data.h"
33 #include "internal.h"
34 #include "mathops.h"
35 
36 typedef struct Ir2Context{
41 } Ir2Context;
42 
43 #define CODE_VLC_BITS 14
44 static VLC ir2_vlc;
45 
46 /* Indeo 2 codes are in range 0x01..0x7F and 0x81..0x90 */
47 static inline int ir2_get_code(GetBitContext *gb)
48 {
49  return get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
50 }
51 
52 static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst,
53  int pitch, const uint8_t *table)
54 {
55  int i;
56  int j;
57  int out = 0;
58 
59  if (width & 1)
60  return AVERROR_INVALIDDATA;
61 
62  /* first line contain absolute values, other lines contain deltas */
63  while (out < width) {
64  int c = ir2_get_code(&ctx->gb);
65  if (c >= 0x80) { /* we have a run */
66  c -= 0x7F;
67  if (out + c*2 > width)
68  return AVERROR_INVALIDDATA;
69  for (i = 0; i < c * 2; i++)
70  dst[out++] = 0x80;
71  } else { /* copy two values from table */
72  if (c <= 0)
73  return AVERROR_INVALIDDATA;
74  dst[out++] = table[c * 2];
75  dst[out++] = table[(c * 2) + 1];
76  }
77  }
78  dst += pitch;
79 
80  for (j = 1; j < height; j++) {
81  out = 0;
82  if (get_bits_left(&ctx->gb) <= 0)
83  return AVERROR_INVALIDDATA;
84  while (out < width) {
85  int c = ir2_get_code(&ctx->gb);
86  if (c >= 0x80) { /* we have a skip */
87  c -= 0x7F;
88  if (out + c*2 > width)
89  return AVERROR_INVALIDDATA;
90  for (i = 0; i < c * 2; i++) {
91  dst[out] = dst[out - pitch];
92  out++;
93  }
94  } else { /* add two deltas from table */
95  int t;
96  if (c <= 0)
97  return AVERROR_INVALIDDATA;
98  t = dst[out - pitch] + (table[c * 2] - 128);
99  t = av_clip_uint8(t);
100  dst[out] = t;
101  out++;
102  t = dst[out - pitch] + (table[(c * 2) + 1] - 128);
103  t = av_clip_uint8(t);
104  dst[out] = t;
105  out++;
106  }
107  }
108  dst += pitch;
109  }
110  return 0;
111 }
112 
114  int pitch, const uint8_t *table)
115 {
116  int j;
117  int out = 0;
118  int c;
119  int t;
120 
121  if (width & 1)
122  return AVERROR_INVALIDDATA;
123 
124  for (j = 0; j < height; j++) {
125  out = 0;
126  if (get_bits_left(&ctx->gb) <= 0)
127  return AVERROR_INVALIDDATA;
128  while (out < width) {
129  c = ir2_get_code(&ctx->gb);
130  if (c >= 0x80) { /* we have a skip */
131  c -= 0x7F;
132  out += c * 2;
133  } else { /* add two deltas from table */
134  if (c <= 0)
135  return AVERROR_INVALIDDATA;
136  t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
137  t = av_clip_uint8(t);
138  dst[out] = t;
139  out++;
140  t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
141  t = av_clip_uint8(t);
142  dst[out] = t;
143  out++;
144  }
145  }
146  dst += pitch;
147  }
148  return 0;
149 }
150 
152  void *data, int *got_frame,
153  AVPacket *avpkt)
154 {
155  Ir2Context * const s = avctx->priv_data;
156  const uint8_t *buf = avpkt->data;
157  int buf_size = avpkt->size;
158  AVFrame *picture = data;
159  AVFrame * const p = s->picture;
160  int start, ret;
161  int ltab, ctab;
162 
163  if ((ret = ff_reget_buffer(avctx, p)) < 0)
164  return ret;
165 
166  start = 48; /* hardcoded for now */
167 
168  if (start >= buf_size) {
169  av_log(s->avctx, AV_LOG_ERROR, "input buffer size too small (%d)\n", buf_size);
170  return AVERROR_INVALIDDATA;
171  }
172 
173  s->decode_delta = buf[18];
174 
175  /* decide whether frame uses deltas or not */
176 #ifndef BITSTREAM_READER_LE
177  for (i = 0; i < buf_size; i++)
178  buf[i] = ff_reverse[buf[i]];
179 #endif
180 
181  if ((ret = init_get_bits8(&s->gb, buf + start, buf_size - start)) < 0)
182  return ret;
183 
184  ltab = buf[0x22] & 3;
185  ctab = buf[0x22] >> 2;
186 
187  if (ctab > 3) {
188  av_log(avctx, AV_LOG_ERROR, "ctab %d is invalid\n", ctab);
189  return AVERROR_INVALIDDATA;
190  }
191 
192  if (s->decode_delta) { /* intraframe */
193  if ((ret = ir2_decode_plane(s, avctx->width, avctx->height,
194  p->data[0], p->linesize[0],
195  ir2_delta_table[ltab])) < 0)
196  return ret;
197 
198  /* swapped U and V */
199  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
200  p->data[2], p->linesize[2],
201  ir2_delta_table[ctab])) < 0)
202  return ret;
203  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
204  p->data[1], p->linesize[1],
205  ir2_delta_table[ctab])) < 0)
206  return ret;
207  } else { /* interframe */
208  if ((ret = ir2_decode_plane_inter(s, avctx->width, avctx->height,
209  p->data[0], p->linesize[0],
210  ir2_delta_table[ltab])) < 0)
211  return ret;
212  /* swapped U and V */
213  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
214  p->data[2], p->linesize[2],
215  ir2_delta_table[ctab])) < 0)
216  return ret;
217  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
218  p->data[1], p->linesize[1],
219  ir2_delta_table[ctab])) < 0)
220  return ret;
221  }
222 
223  if ((ret = av_frame_ref(picture, p)) < 0)
224  return ret;
225 
226  *got_frame = 1;
227 
228  return buf_size;
229 }
230 
232 {
233  Ir2Context * const ic = avctx->priv_data;
234  static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
235 
236  ic->avctx = avctx;
237 
238  avctx->pix_fmt= AV_PIX_FMT_YUV410P;
239 
240  ic->picture = av_frame_alloc();
241  if (!ic->picture)
242  return AVERROR(ENOMEM);
243 
244  ir2_vlc.table = vlc_tables;
245  ir2_vlc.table_allocated = 1 << CODE_VLC_BITS;
246 #ifdef BITSTREAM_READER_LE
247  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
248  &ir2_codes[0][1], 4, 2,
250 #else
251  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
252  &ir2_codes[0][1], 4, 2,
253  &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
254 #endif
255 
256  return 0;
257 }
258 
260 {
261  Ir2Context * const ic = avctx->priv_data;
262 
263  av_frame_free(&ic->picture);
264 
265  return 0;
266 }
267 
269  .name = "indeo2",
270  .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 2"),
271  .type = AVMEDIA_TYPE_VIDEO,
272  .id = AV_CODEC_ID_INDEO2,
273  .priv_data_size = sizeof(Ir2Context),
275  .close = ir2_decode_end,
277  .capabilities = AV_CODEC_CAP_DR1,
278 };
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int ir2_get_code(GetBitContext *gb)
Definition: indeo2.c:47
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
GetBitContext gb
Definition: indeo2.c:39
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
const uint8_t ff_reverse[256]
Definition: reverse.c:23
int decode_delta
Definition: indeo2.c:40
int size
Definition: avcodec.h:1401
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1697
AVCodec.
Definition: avcodec.h:3351
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.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: decode.c:1935
Macro definitions for various function/variable attributes.
static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
Definition: indeo2.c:113
AVCodec ff_indeo2_decoder
Definition: indeo2.c:268
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
Definition: indeo2.c:52
uint8_t
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
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:400
#define height
uint8_t * data
Definition: avcodec.h:1400
bitstream reader API header.
#define av_log(a,...)
static av_cold int ir2_decode_init(AVCodecContext *avctx)
Definition: indeo2.c:231
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:587
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
#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:163
static const struct endianess table[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
uint16_t width
Definition: gdv.c:47
const char * name
Name of the codec implementation.
Definition: avcodec.h:3358
Definition: vlc.h:26
static av_cold int ir2_decode_end(AVCodecContext *avctx)
Definition: indeo2.c:259
int width
picture width / height.
Definition: avcodec.h:1660
AVFormatContext * ctx
Definition: movenc.c:48
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:554
#define INIT_VLC_LE
Definition: vlc.h:54
int table_allocated
Definition: vlc.h:29
#define CODE_VLC_BITS
Definition: indeo2.c:43
Libavcodec external API header.
static int ir2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: indeo2.c:151
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:456
main external API structure.
Definition: avcodec.h:1488
void * buf
Definition: avisynth_c.h:690
AVFrame * picture
Definition: indeo2.c:38
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
#define IR2_CODES
Definition: indeo2data.h:27
static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2]
Definition: imc.c:118
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
common internal api header.
static double c[64]
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55
void * priv_data
Definition: avcodec.h:1515
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
AVCodecContext * avctx
Definition: indeo2.c:37
static const uint8_t ir2_delta_table[4][256]
Definition: indeo2data.h:67
FILE * out
Definition: movenc.c:54
void INT64 start
Definition: avisynth_c.h:690
#define VLC_TYPE
Definition: vlc.h:24
static VLC ir2_vlc
Definition: indeo2.c:44
This structure stores compressed data.
Definition: avcodec.h:1377
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956
static const uint16_t ir2_codes[IR2_CODES][2]
Definition: indeo2data.h:28