FFmpeg  2.1.1
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 stride, const uint8_t *table)
53 {
54  int i;
55  int j;
56  int out = 0;
57  int c;
58  int t;
59 
60  if (width & 1)
61  return AVERROR_INVALIDDATA;
62 
63  /* first line contain absolute values, other lines contain deltas */
64  while (out < width) {
65  c = ir2_get_code(&ctx->gb);
66  if (c >= 0x80) { /* we have a run */
67  c -= 0x7F;
68  if (out + c*2 > width)
69  return AVERROR_INVALIDDATA;
70  for (i = 0; i < c * 2; i++)
71  dst[out++] = 0x80;
72  } else { /* copy two values from table */
73  dst[out++] = table[c * 2];
74  dst[out++] = table[(c * 2) + 1];
75  }
76  }
77  dst += stride;
78 
79  for (j = 1; j < height; j++) {
80  out = 0;
81  while (out < width) {
82  c = ir2_get_code(&ctx->gb);
83  if (c >= 0x80) { /* we have a skip */
84  c -= 0x7F;
85  if (out + c*2 > width)
86  return AVERROR_INVALIDDATA;
87  for (i = 0; i < c * 2; i++) {
88  dst[out] = dst[out - stride];
89  out++;
90  }
91  } else { /* add two deltas from table */
92  t = dst[out - stride] + (table[c * 2] - 128);
93  t = av_clip_uint8(t);
94  dst[out] = t;
95  out++;
96  t = dst[out - stride] + (table[(c * 2) + 1] - 128);
97  t = av_clip_uint8(t);
98  dst[out] = t;
99  out++;
100  }
101  }
102  dst += stride;
103  }
104  return 0;
105 }
106 
107 static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst,
108  int stride, const uint8_t *table)
109 {
110  int j;
111  int out = 0;
112  int c;
113  int t;
114 
115  if (width & 1)
116  return AVERROR_INVALIDDATA;
117 
118  for (j = 0; j < height; j++) {
119  out = 0;
120  while (out < width) {
121  c = ir2_get_code(&ctx->gb);
122  if (c >= 0x80) { /* we have a skip */
123  c -= 0x7F;
124  out += c * 2;
125  } else { /* add two deltas from table */
126  t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
127  t = av_clip_uint8(t);
128  dst[out] = t;
129  out++;
130  t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
131  t = av_clip_uint8(t);
132  dst[out] = t;
133  out++;
134  }
135  }
136  dst += stride;
137  }
138  return 0;
139 }
140 
142  void *data, int *got_frame,
143  AVPacket *avpkt)
144 {
145  Ir2Context * const s = avctx->priv_data;
146  const uint8_t *buf = avpkt->data;
147  int buf_size = avpkt->size;
148  AVFrame *picture = data;
149  AVFrame * const p = s->picture;
150  int start, ret;
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  init_get_bits(&s->gb, buf + start, (buf_size - start) * 8);
171 
172  if (s->decode_delta) { /* intraframe */
173  if ((ret = ir2_decode_plane(s, avctx->width, avctx->height,
174  s->picture->data[0], s->picture->linesize[0],
175  ir2_luma_table)) < 0)
176  return ret;
177 
178  /* swapped U and V */
179  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
180  s->picture->data[2], s->picture->linesize[2],
181  ir2_luma_table)) < 0)
182  return ret;
183  if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
184  s->picture->data[1], s->picture->linesize[1],
185  ir2_luma_table)) < 0)
186  return ret;
187  } else { /* interframe */
188  if ((ret = ir2_decode_plane_inter(s, avctx->width, avctx->height,
189  s->picture->data[0], s->picture->linesize[0],
190  ir2_luma_table)) < 0)
191  return ret;
192  /* swapped U and V */
193  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
194  s->picture->data[2], s->picture->linesize[2],
195  ir2_luma_table)) < 0)
196  return ret;
197  if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
198  s->picture->data[1], s->picture->linesize[1],
199  ir2_luma_table)) < 0)
200  return ret;
201  }
202 
203  if ((ret = av_frame_ref(picture, s->picture)) < 0)
204  return ret;
205 
206  *got_frame = 1;
207 
208  return buf_size;
209 }
210 
212 {
213  Ir2Context * const ic = avctx->priv_data;
214  static VLC_TYPE vlc_tables[1 << CODE_VLC_BITS][2];
215 
216  ic->avctx = avctx;
217 
218  avctx->pix_fmt= AV_PIX_FMT_YUV410P;
219 
220  ic->picture = av_frame_alloc();
221  if (!ic->picture)
222  return AVERROR(ENOMEM);
223 
224  ir2_vlc.table = vlc_tables;
225  ir2_vlc.table_allocated = 1 << CODE_VLC_BITS;
226 #ifdef BITSTREAM_READER_LE
227  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
228  &ir2_codes[0][1], 4, 2,
230 #else
231  init_vlc(&ir2_vlc, CODE_VLC_BITS, IR2_CODES,
232  &ir2_codes[0][1], 4, 2,
233  &ir2_codes[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
234 #endif
235 
236  return 0;
237 }
238 
240 {
241  Ir2Context * const ic = avctx->priv_data;
242 
243  av_frame_free(&ic->picture);
244 
245  return 0;
246 }
247 
249  .name = "indeo2",
250  .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 2"),
251  .type = AVMEDIA_TYPE_VIDEO,
252  .id = AV_CODEC_ID_INDEO2,
253  .priv_data_size = sizeof(Ir2Context),
257  .capabilities = CODEC_CAP_DR1,
258 };
const char * s
Definition: avisynth_c.h:668
static int ir2_get_code(GetBitContext *gb)
Definition: indeo2.c:46
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
GetBitContext gb
Definition: indeo2.c:38
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static struct endianess table[]
int decode_delta
Definition: indeo2.c:39
int size
Definition: avcodec.h:1064
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
#define VLC_TYPE
Definition: get_bits.h:61
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:2922
#define av_cold
Definition: avcodec.h:653
AVCodec ff_indeo2_decoder
Definition: indeo2.c:248
uint8_t
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
bitstream reader API header.
static av_cold int ir2_decode_init(AVCodecContext *avctx)
Definition: indeo2.c:211
#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
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:110
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:123
Libavcodec external API header.
Definition: get_bits.h:63
static av_cold int ir2_decode_end(AVCodecContext *avctx)
Definition: indeo2.c:239
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
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
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:550
#define INIT_VLC_USE_NEW_STATIC
Definition: get_bits.h:469
int table_allocated
Definition: get_bits.h:66
#define CODE_VLC_BITS
Definition: indeo2.c:42
static int width
Definition: utils.c:158
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride, const uint8_t *table)
Definition: indeo2.c:51
static int ir2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: indeo2.c:141
main external API structure.
Definition: avcodec.h:1146
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int stride, const uint8_t *table)
Definition: indeo2.c:107
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:452
void * buf
Definition: avisynth_c.h:594
#define INIT_VLC_LE
Definition: get_bits.h:468
BYTE int const BYTE int int int height
Definition: avisynth_c.h:713
AVFrame * picture
Definition: indeo2.c:37
#define IR2_CODES
Definition: indeo2data.h:27
uint8_t * data
Definition: avcodec.h:1063
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:405
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2]
Definition: imc.c:119
static const uint8_t ir2_luma_table[256]
Definition: indeo2data.h:106
void * priv_data
Definition: avcodec.h:1182
static float t
Definition: muxing.c:123
common internal api header.
static double c[64]
#define AVERROR_INVALIDDATA
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);ff_audio_convert_init_arm(ac);ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
AVCodecContext * avctx
Definition: indeo2.c:36
#define AVERROR(e)
void INT64 start
Definition: avisynth_c.h:594
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
const uint8_t ff_reverse[256]
Definition: mathtables.c:72
static VLC ir2_vlc
Definition: indeo2.c:43
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
planar YUV 4:1:0, 9bpp, (1 Cr &amp; Cb sample per 4x4 Y samples)
Definition: avcodec.h:4540
static const uint16_t ir2_codes[IR2_CODES][2]
Definition: indeo2data.h:28