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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 #define BITSTREAM_READER_LE
28 #include "libavutil/attributes.h"
29 #include "avcodec.h"
30 #include "get_bits.h"
31 #include "indeo2data.h"
32 #include "internal.h"
33 #include "mathops.h"
34 
35 typedef struct Ir2Context{
40 } Ir2Context;
41 
42 #define CODE_VLC_BITS 14
43 static VLC ir2_vlc;
44 
45 /* Indeo 2 codes are in range 0x01..0x7F and 0x81..0x90 */
46 static inline int ir2_get_code(GetBitContext *gb)
47 {
48  return get_vlc2(gb, ir2_vlc.table, CODE_VLC_BITS, 1) + 1;
49 }
50 
51 static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst,
52  int pitch, const uint8_t *table)
53 {
54  int i;
55  int j;
56  int out = 0;
57 
58  if (width & 1)
59  return AVERROR_INVALIDDATA;
60 
61  /* first line contain absolute values, other lines contain deltas */
62  while (out < width) {
63  int c = ir2_get_code(&ctx->gb);
64  if (c >= 0x80) { /* we have a run */
65  c -= 0x7F;
66  if (out + c*2 > width)
67  return AVERROR_INVALIDDATA;
68  for (i = 0; i < c * 2; i++)
69  dst[out++] = 0x80;
70  } else { /* copy two values from table */
71  dst[out++] = table[c * 2];
72  dst[out++] = table[(c * 2) + 1];
73  }
74  }
75  dst += pitch;
76 
77  for (j = 1; j < height; j++) {
78  out = 0;
79  while (out < width) {
80  int c = ir2_get_code(&ctx->gb);
81  if (c >= 0x80) { /* we have a skip */
82  c -= 0x7F;
83  if (out + c*2 > width)
84  return AVERROR_INVALIDDATA;
85  for (i = 0; i < c * 2; i++) {
86  dst[out] = dst[out - pitch];
87  out++;
88  }
89  } else { /* add two deltas from table */
90  int t = dst[out - pitch] + (table[c * 2] - 128);
91  t = av_clip_uint8(t);
92  dst[out] = t;
93  out++;
94  t = dst[out - pitch] + (table[(c * 2) + 1] - 128);
95  t = av_clip_uint8(t);
96  dst[out] = t;
97  out++;
98  }
99  }
100  dst += pitch;
101  }
102  return 0;
103 }
104 
106  int pitch, const uint8_t *table)
107 {
108  int j;
109  int out = 0;
110  int c;
111  int t;
112 
113  if (width & 1)
114  return AVERROR_INVALIDDATA;
115 
116  for (j = 0; j < height; j++) {
117  out = 0;
118  while (out < width) {
119  c = ir2_get_code(&ctx->gb);
120  if (c >= 0x80) { /* we have a skip */
121  c -= 0x7F;
122  out += c * 2;
123  } else { /* add two deltas from table */
124  t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
125  t = av_clip_uint8(t);
126  dst[out] = t;
127  out++;
128  t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
129  t = av_clip_uint8(t);
130  dst[out] = t;
131  out++;
132  }
133  }
134  dst += pitch;
135  }
136  return 0;
137 }
138 
140  void *data, int *got_frame,
141  AVPacket *avpkt)
142 {
143  Ir2Context * const s = avctx->priv_data;
144  const uint8_t *buf = avpkt->data;
145  int buf_size = avpkt->size;
146  AVFrame *picture = data;
147  AVFrame * const p = s->picture;
148  int start, ret;
149  int ltab, ctab;
150 
151  if ((ret = ff_reget_buffer(avctx, p)) < 0)
152  return ret;
153 
154  start = 48; /* hardcoded for now */
155 
156  if (start >= buf_size) {
157  av_log(s->avctx, AV_LOG_ERROR, "input buffer size too small (%d)\n", buf_size);
158  return AVERROR_INVALIDDATA;
159  }
160 
161  s->decode_delta = buf[18];
162 
163  /* decide whether frame uses deltas or not */
164 #ifndef BITSTREAM_READER_LE
165  for (i = 0; i < buf_size; i++)
166  buf[i] = ff_reverse[buf[i]];
167 #endif
168 
169  if ((ret = init_get_bits8(&s->gb, buf + start, buf_size - start)) < 0)
170  return ret;
171 
172  ltab = buf[0x22] & 3;
173  ctab = buf[0x22] >> 2;
174  if (s->decode_delta) { /* intraframe */
175  if ((ret = ir2_decode_plane(s, avctx->width, avctx->height,
176  p->data[0], p->linesize[0],
177  ir2_delta_table[ltab])) < 0)
178  return ret;
179 
180  /* swapped U and V */
181  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
182  p->data[2], p->linesize[2],
183  ir2_delta_table[ctab])) < 0)
184  return ret;
185  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
186  p->data[1], p->linesize[1],
187  ir2_delta_table[ctab])) < 0)
188  return ret;
189  } else { /* interframe */
190  if ((ret = ir2_decode_plane_inter(s, avctx->width, avctx->height,
191  p->data[0], p->linesize[0],
192  ir2_delta_table[ltab])) < 0)
193  return ret;
194  /* swapped U and V */
195  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
196  p->data[2], p->linesize[2],
197  ir2_delta_table[ctab])) < 0)
198  return ret;
199  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
200  p->data[1], p->linesize[1],
201  ir2_delta_table[ctab])) < 0)
202  return ret;
203  }
204 
205  if ((ret = av_frame_ref(picture, p)) < 0)
206  return ret;
207 
208  *got_frame = 1;
209 
210  return buf_size;
211 }
212 
214 {
215  Ir2Context * const ic = avctx->priv_data;
216  static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
217 
218  ic->avctx = avctx;
219 
220  avctx->pix_fmt= AV_PIX_FMT_YUV410P;
221 
222  ic->picture = av_frame_alloc();
223  if (!ic->picture)
224  return AVERROR(ENOMEM);
225 
226  ir2_vlc.table = vlc_tables;
227  ir2_vlc.table_allocated = 1 << CODE_VLC_BITS;
228 #ifdef BITSTREAM_READER_LE
229  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
230  &ir2_codes[0][1], 4, 2,
232 #else
233  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
234  &ir2_codes[0][1], 4, 2,
235  &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
236 #endif
237 
238  return 0;
239 }
240 
242 {
243  Ir2Context * const ic = avctx->priv_data;
244 
245  av_frame_free(&ic->picture);
246 
247  return 0;
248 }
249 
251  .name = "indeo2",
252  .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 2"),
253  .type = AVMEDIA_TYPE_VIDEO,
254  .id = AV_CODEC_ID_INDEO2,
255  .priv_data_size = sizeof(Ir2Context),
257  .close = ir2_decode_end,
259  .capabilities = AV_CODEC_CAP_DR1,
260 };
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:46
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
AVFormatContext * ctx
Definition: movenc-test.c:48
GetBitContext gb
Definition: indeo2.c:38
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int decode_delta
Definition: indeo2.c:39
int size
Definition: avcodec.h:1578
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1870
#define VLC_TYPE
Definition: get_bits.h:61
AVCodec.
Definition: avcodec.h:3535
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:105
AVCodec ff_indeo2_decoder
Definition: indeo2.c:250
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
Definition: indeo2.c:51
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
uint8_t * data
Definition: avcodec.h:1577
bitstream reader API header.
#define av_log(a,...)
static av_cold int ir2_decode_init(AVCodecContext *avctx)
Definition: indeo2.c:213
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#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:3542
Definition: get_bits.h:63
static av_cold int ir2_decode_end(AVCodecContext *avctx)
Definition: indeo2.c:241
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
int width
picture width / height.
Definition: avcodec.h:1829
#define width
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:574
#define INIT_VLC_USE_NEW_STATIC
Definition: get_bits.h:482
FILE * out
Definition: movenc-test.c:54
int table_allocated
Definition: get_bits.h:66
#define CODE_VLC_BITS
Definition: indeo2.c:42
Libavcodec external API header.
static int ir2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: indeo2.c:139
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:449
main external API structure.
Definition: avcodec.h:1642
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:465
void * buf
Definition: avisynth_c.h:553
#define INIT_VLC_LE
Definition: get_bits.h:481
AVFrame * picture
Definition: indeo2.c:37
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:194
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
common internal api header.
static double c[64]
void * priv_data
Definition: avcodec.h:1684
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
AVCodecContext * avctx
Definition: indeo2.c:36
static const uint8_t ir2_delta_table[4][256]
Definition: indeo2data.h:106
void INT64 start
Definition: avisynth_c.h:553
#define height
static VLC ir2_vlc
Definition: indeo2.c:43
This structure stores compressed data.
Definition: avcodec.h:1554
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:953
static const uint16_t ir2_codes[IR2_CODES][2]
Definition: indeo2data.h:28