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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  dst[out++] = table[c * 2];
73  dst[out++] = table[(c * 2) + 1];
74  }
75  }
76  dst += pitch;
77 
78  for (j = 1; j < height; j++) {
79  out = 0;
80  while (out < width) {
81  int c = ir2_get_code(&ctx->gb);
82  if (c >= 0x80) { /* we have a skip */
83  c -= 0x7F;
84  if (out + c*2 > width)
85  return AVERROR_INVALIDDATA;
86  for (i = 0; i < c * 2; i++) {
87  dst[out] = dst[out - pitch];
88  out++;
89  }
90  } else { /* add two deltas from table */
91  int t = dst[out - pitch] + (table[c * 2] - 128);
92  t = av_clip_uint8(t);
93  dst[out] = t;
94  out++;
95  t = dst[out - pitch] + (table[(c * 2) + 1] - 128);
96  t = av_clip_uint8(t);
97  dst[out] = t;
98  out++;
99  }
100  }
101  dst += pitch;
102  }
103  return 0;
104 }
105 
107  int pitch, const uint8_t *table)
108 {
109  int j;
110  int out = 0;
111  int c;
112  int t;
113 
114  if (width & 1)
115  return AVERROR_INVALIDDATA;
116 
117  for (j = 0; j < height; j++) {
118  out = 0;
119  while (out < width) {
120  c = ir2_get_code(&ctx->gb);
121  if (c >= 0x80) { /* we have a skip */
122  c -= 0x7F;
123  out += c * 2;
124  } else { /* add two deltas from table */
125  t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
126  t = av_clip_uint8(t);
127  dst[out] = t;
128  out++;
129  t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
130  t = av_clip_uint8(t);
131  dst[out] = t;
132  out++;
133  }
134  }
135  dst += pitch;
136  }
137  return 0;
138 }
139 
141  void *data, int *got_frame,
142  AVPacket *avpkt)
143 {
144  Ir2Context * const s = avctx->priv_data;
145  const uint8_t *buf = avpkt->data;
146  int buf_size = avpkt->size;
147  AVFrame *picture = data;
148  AVFrame * const p = s->picture;
149  int start, ret;
150  int ltab, ctab;
151 
152  if ((ret = ff_reget_buffer(avctx, p)) < 0)
153  return ret;
154 
155  start = 48; /* hardcoded for now */
156 
157  if (start >= buf_size) {
158  av_log(s->avctx, AV_LOG_ERROR, "input buffer size too small (%d)\n", buf_size);
159  return AVERROR_INVALIDDATA;
160  }
161 
162  s->decode_delta = buf[18];
163 
164  /* decide whether frame uses deltas or not */
165 #ifndef BITSTREAM_READER_LE
166  for (i = 0; i < buf_size; i++)
167  buf[i] = ff_reverse[buf[i]];
168 #endif
169 
170  if ((ret = init_get_bits8(&s->gb, buf + start, buf_size - start)) < 0)
171  return ret;
172 
173  ltab = buf[0x22] & 3;
174  ctab = buf[0x22] >> 2;
175  if (s->decode_delta) { /* intraframe */
176  if ((ret = ir2_decode_plane(s, avctx->width, avctx->height,
177  p->data[0], p->linesize[0],
178  ir2_delta_table[ltab])) < 0)
179  return ret;
180 
181  /* swapped U and V */
182  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
183  p->data[2], p->linesize[2],
184  ir2_delta_table[ctab])) < 0)
185  return ret;
186  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
187  p->data[1], p->linesize[1],
188  ir2_delta_table[ctab])) < 0)
189  return ret;
190  } else { /* interframe */
191  if ((ret = ir2_decode_plane_inter(s, avctx->width, avctx->height,
192  p->data[0], p->linesize[0],
193  ir2_delta_table[ltab])) < 0)
194  return ret;
195  /* swapped U and V */
196  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
197  p->data[2], p->linesize[2],
198  ir2_delta_table[ctab])) < 0)
199  return ret;
200  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
201  p->data[1], p->linesize[1],
202  ir2_delta_table[ctab])) < 0)
203  return ret;
204  }
205 
206  if ((ret = av_frame_ref(picture, p)) < 0)
207  return ret;
208 
209  *got_frame = 1;
210 
211  return buf_size;
212 }
213 
215 {
216  Ir2Context * const ic = avctx->priv_data;
217  static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
218 
219  ic->avctx = avctx;
220 
221  avctx->pix_fmt= AV_PIX_FMT_YUV410P;
222 
223  ic->picture = av_frame_alloc();
224  if (!ic->picture)
225  return AVERROR(ENOMEM);
226 
227  ir2_vlc.table = vlc_tables;
228  ir2_vlc.table_allocated = 1 << CODE_VLC_BITS;
229 #ifdef BITSTREAM_READER_LE
230  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
231  &ir2_codes[0][1], 4, 2,
233 #else
234  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
235  &ir2_codes[0][1], 4, 2,
236  &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
237 #endif
238 
239  return 0;
240 }
241 
243 {
244  Ir2Context * const ic = avctx->priv_data;
245 
246  av_frame_free(&ic->picture);
247 
248  return 0;
249 }
250 
252  .name = "indeo2",
253  .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 2"),
254  .type = AVMEDIA_TYPE_VIDEO,
255  .id = AV_CODEC_ID_INDEO2,
256  .priv_data_size = sizeof(Ir2Context),
258  .close = ir2_decode_end,
260  .capabilities = AV_CODEC_CAP_DR1,
261 };
const char * s
Definition: avisynth_c.h:631
#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:184
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
int decode_delta
Definition: indeo2.c:40
int size
Definition: avcodec.h:1589
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1885
AVCodec.
Definition: avcodec.h:3559
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:106
AVCodec ff_indeo2_decoder
Definition: indeo2.c:251
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:140
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:374
#define height
uint8_t * data
Definition: avcodec.h:1588
bitstream reader API header.
#define av_log(a,...)
static av_cold int ir2_decode_init(AVCodecContext *avctx)
Definition: indeo2.c:214
#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:153
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:176
const uint8_t ff_reverse[256]
Definition: reverse.c:23
const char * name
Name of the codec implementation.
Definition: avcodec.h:3566
Definition: vlc.h:26
static av_cold int ir2_decode_end(AVCodecContext *avctx)
Definition: indeo2.c:242
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:977
#define width
int width
picture width / height.
Definition: avcodec.h:1844
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:535
#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:140
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:437
main external API structure.
Definition: avcodec.h:1657
void * buf
Definition: avisynth_c.h:553
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:198
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:752
common internal api header.
static double c[64]
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55
void * priv_data
Definition: avcodec.h:1699
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:553
#define VLC_TYPE
Definition: vlc.h:24
static VLC ir2_vlc
Definition: indeo2.c:44
This structure stores compressed data.
Definition: avcodec.h:1565
#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