ffmpeg / libavcodec / indeo5.c @ 6eec969d
History | View | Annotate | Download (27.5 KB)
| 1 |
/*
|
|---|---|
| 2 |
* Indeo Video Interactive v5 compatible decoder
|
| 3 |
* Copyright (c) 2009 Maxim Poliakovski
|
| 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 libavcodec/indeo5.c
|
| 24 |
* Indeo Video Interactive version 5 decoder
|
| 25 |
*
|
| 26 |
* Indeo5 data is usually transported within .avi or .mov files.
|
| 27 |
* Known FOURCCs: 'IV50'
|
| 28 |
*/
|
| 29 |
|
| 30 |
#define ALT_BITSTREAM_READER_LE
|
| 31 |
#include "avcodec.h" |
| 32 |
#include "get_bits.h" |
| 33 |
#include "dsputil.h" |
| 34 |
#include "ivi_dsp.h" |
| 35 |
#include "ivi_common.h" |
| 36 |
#include "indeo5data.h" |
| 37 |
|
| 38 |
/**
|
| 39 |
* Indeo5 frame types.
|
| 40 |
*/
|
| 41 |
enum {
|
| 42 |
FRAMETYPE_INTRA = 0,
|
| 43 |
FRAMETYPE_INTER = 1, ///< non-droppable P-frame |
| 44 |
FRAMETYPE_INTER_SCAL = 2, ///< droppable P-frame used in the scalability mode |
| 45 |
FRAMETYPE_INTER_NOREF = 3, ///< droppable P-frame |
| 46 |
FRAMETYPE_NULL = 4 ///< empty frame with no data |
| 47 |
}; |
| 48 |
|
| 49 |
#define IVI5_PIC_SIZE_ESC 15 |
| 50 |
|
| 51 |
#define IVI5_IS_PROTECTED 0x20 |
| 52 |
|
| 53 |
typedef struct { |
| 54 |
GetBitContext gb; |
| 55 |
AVFrame frame; |
| 56 |
RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables |
| 57 |
IVIPlaneDesc planes[3]; ///< color planes |
| 58 |
const uint8_t *frame_data; ///< input frame data pointer |
| 59 |
int buf_switch; ///< used to switch between three buffers |
| 60 |
int dst_buf; ///< buffer index for the currently decoded frame |
| 61 |
int ref_buf; ///< inter frame reference buffer index |
| 62 |
uint32_t frame_size; ///< frame size in bytes
|
| 63 |
int frame_type;
|
| 64 |
int prev_frame_type; ///< frame type of the previous frame |
| 65 |
int frame_num;
|
| 66 |
uint32_t pic_hdr_size; ///< picture header size in bytes
|
| 67 |
uint8_t frame_flags; |
| 68 |
uint16_t checksum; ///< frame checksum
|
| 69 |
|
| 70 |
IVIHuffTab mb_vlc; ///< vlc table for decoding macroblock data
|
| 71 |
|
| 72 |
uint16_t gop_hdr_size; |
| 73 |
uint8_t gop_flags; |
| 74 |
int is_scalable;
|
| 75 |
uint32_t lock_word; |
| 76 |
IVIPicConfig pic_conf; |
| 77 |
} IVI5DecContext; |
| 78 |
|
| 79 |
|
| 80 |
/**
|
| 81 |
* Decodes Indeo5 GOP (Group of pictures) header.
|
| 82 |
* This header is present in key frames only.
|
| 83 |
* It defines parameters for all frames in a GOP.
|
| 84 |
*
|
| 85 |
* @param ctx [in,out] ptr to the decoder context
|
| 86 |
* @param avctx [in] ptr to the AVCodecContext
|
| 87 |
* @return result code: 0 = OK, -1 = error
|
| 88 |
*/
|
| 89 |
static int decode_gop_header(IVI5DecContext *ctx, AVCodecContext *avctx) |
| 90 |
{
|
| 91 |
int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, blk_size_changed = 0; |
| 92 |
IVIBandDesc *band, *band1, *band2; |
| 93 |
IVIPicConfig pic_conf; |
| 94 |
|
| 95 |
ctx->gop_flags = get_bits(&ctx->gb, 8);
|
| 96 |
|
| 97 |
ctx->gop_hdr_size = (ctx->gop_flags & 1) ? get_bits(&ctx->gb, 16) : 0; |
| 98 |
|
| 99 |
if (ctx->gop_flags & IVI5_IS_PROTECTED)
|
| 100 |
ctx->lock_word = get_bits_long(&ctx->gb, 32);
|
| 101 |
|
| 102 |
tile_size = (ctx->gop_flags & 0x40) ? 64 << get_bits(&ctx->gb, 2) : 0; |
| 103 |
if (tile_size > 256) { |
| 104 |
av_log(avctx, AV_LOG_ERROR, "Invalid tile size: %d\n", tile_size);
|
| 105 |
return -1; |
| 106 |
} |
| 107 |
|
| 108 |
/* decode number of wavelet bands */
|
| 109 |
/* num_levels * 3 + 1 */
|
| 110 |
pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; |
| 111 |
pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; |
| 112 |
ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; |
| 113 |
if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { |
| 114 |
av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
|
| 115 |
pic_conf.luma_bands, pic_conf.chroma_bands); |
| 116 |
return -1; |
| 117 |
} |
| 118 |
|
| 119 |
pic_size_indx = get_bits(&ctx->gb, 4);
|
| 120 |
if (pic_size_indx == IVI5_PIC_SIZE_ESC) {
|
| 121 |
pic_conf.pic_height = get_bits(&ctx->gb, 13);
|
| 122 |
pic_conf.pic_width = get_bits(&ctx->gb, 13);
|
| 123 |
} else {
|
| 124 |
pic_conf.pic_height = ivi5_common_pic_sizes[pic_size_indx * 2 + 1] << 2; |
| 125 |
pic_conf.pic_width = ivi5_common_pic_sizes[pic_size_indx * 2 ] << 2; |
| 126 |
} |
| 127 |
|
| 128 |
if (ctx->gop_flags & 2) { |
| 129 |
av_log(avctx, AV_LOG_ERROR, "YV12 picture format not supported!\n");
|
| 130 |
return -1; |
| 131 |
} |
| 132 |
|
| 133 |
pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2; |
| 134 |
pic_conf.chroma_width = (pic_conf.pic_width + 3) >> 2; |
| 135 |
|
| 136 |
if (!tile_size) {
|
| 137 |
pic_conf.tile_height = pic_conf.pic_height; |
| 138 |
pic_conf.tile_width = pic_conf.pic_width; |
| 139 |
} else {
|
| 140 |
pic_conf.tile_height = pic_conf.tile_width = tile_size; |
| 141 |
} |
| 142 |
|
| 143 |
/* check if picture layout was changed and reallocate buffers */
|
| 144 |
if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
|
| 145 |
result = ff_ivi_init_planes(ctx->planes, &pic_conf); |
| 146 |
if (result) {
|
| 147 |
av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
|
| 148 |
return -1; |
| 149 |
} |
| 150 |
ctx->pic_conf = pic_conf; |
| 151 |
blk_size_changed = 1; /* force reallocation of the internal structures */ |
| 152 |
} |
| 153 |
|
| 154 |
for (p = 0; p <= 1; p++) { |
| 155 |
for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) { |
| 156 |
band = &ctx->planes[p].bands[i]; |
| 157 |
|
| 158 |
band->is_halfpel = get_bits1(&ctx->gb); |
| 159 |
|
| 160 |
mb_size = get_bits1(&ctx->gb); |
| 161 |
blk_size = 8 >> get_bits1(&ctx->gb);
|
| 162 |
mb_size = blk_size << !mb_size; |
| 163 |
|
| 164 |
blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; |
| 165 |
if (blk_size_changed) {
|
| 166 |
band->mb_size = mb_size; |
| 167 |
band->blk_size = blk_size; |
| 168 |
} |
| 169 |
|
| 170 |
if (get_bits1(&ctx->gb)) {
|
| 171 |
av_log(avctx, AV_LOG_ERROR, "Extended transform info encountered!\n");
|
| 172 |
return -1; |
| 173 |
} |
| 174 |
|
| 175 |
/* select transform function and scan pattern according to plane and band number */
|
| 176 |
switch ((p << 2) + i) { |
| 177 |
case 0: |
| 178 |
band->inv_transform = ff_ivi_inverse_slant_8x8; |
| 179 |
band->dc_transform = ff_ivi_dc_slant_2d; |
| 180 |
band->scan = ff_zigzag_direct; |
| 181 |
break;
|
| 182 |
|
| 183 |
case 1: |
| 184 |
band->inv_transform = ff_ivi_row_slant8; |
| 185 |
band->dc_transform = ff_ivi_dc_row_slant; |
| 186 |
band->scan = ivi5_scans8x8[0];
|
| 187 |
break;
|
| 188 |
|
| 189 |
case 2: |
| 190 |
band->inv_transform = ff_ivi_col_slant8; |
| 191 |
band->dc_transform = ff_ivi_dc_col_slant; |
| 192 |
band->scan = ivi5_scans8x8[1];
|
| 193 |
break;
|
| 194 |
|
| 195 |
case 3: |
| 196 |
band->inv_transform = ff_ivi_put_pixels_8x8; |
| 197 |
band->dc_transform = ff_ivi_put_dc_pixel_8x8; |
| 198 |
band->scan = ivi5_scans8x8[1];
|
| 199 |
break;
|
| 200 |
|
| 201 |
case 4: |
| 202 |
band->inv_transform = ff_ivi_inverse_slant_4x4; |
| 203 |
band->dc_transform = ff_ivi_dc_slant_2d; |
| 204 |
band->scan = ivi5_scan4x4; |
| 205 |
break;
|
| 206 |
} |
| 207 |
|
| 208 |
band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || |
| 209 |
band->inv_transform == ff_ivi_inverse_slant_4x4; |
| 210 |
|
| 211 |
/* select dequant matrix according to plane and band number */
|
| 212 |
if (!p) {
|
| 213 |
band->quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0; |
| 214 |
} else {
|
| 215 |
band->quant_mat = 5;
|
| 216 |
} |
| 217 |
|
| 218 |
if (get_bits(&ctx->gb, 2)) { |
| 219 |
av_log(avctx, AV_LOG_ERROR, "End marker missing!\n");
|
| 220 |
return -1; |
| 221 |
} |
| 222 |
} |
| 223 |
} |
| 224 |
|
| 225 |
/* copy chroma parameters into the 2nd chroma plane */
|
| 226 |
for (i = 0; i < pic_conf.chroma_bands; i++) { |
| 227 |
band1 = &ctx->planes[1].bands[i];
|
| 228 |
band2 = &ctx->planes[2].bands[i];
|
| 229 |
|
| 230 |
band2->width = band1->width; |
| 231 |
band2->height = band1->height; |
| 232 |
band2->mb_size = band1->mb_size; |
| 233 |
band2->blk_size = band1->blk_size; |
| 234 |
band2->is_halfpel = band1->is_halfpel; |
| 235 |
band2->quant_mat = band1->quant_mat; |
| 236 |
band2->scan = band1->scan; |
| 237 |
band2->inv_transform = band1->inv_transform; |
| 238 |
band2->dc_transform = band1->dc_transform; |
| 239 |
band2->is_2d_trans = band1->is_2d_trans; |
| 240 |
} |
| 241 |
|
| 242 |
/* reallocate internal structures if needed */
|
| 243 |
if (blk_size_changed) {
|
| 244 |
result = ff_ivi_init_tiles(ctx->planes, pic_conf.tile_width, |
| 245 |
pic_conf.tile_height); |
| 246 |
if (result) {
|
| 247 |
av_log(avctx, AV_LOG_ERROR, |
| 248 |
"Couldn't reallocate internal structures!\n");
|
| 249 |
return -1; |
| 250 |
} |
| 251 |
} |
| 252 |
|
| 253 |
if (ctx->gop_flags & 8) { |
| 254 |
if (get_bits(&ctx->gb, 3)) { |
| 255 |
av_log(avctx, AV_LOG_ERROR, "Alignment bits are not zero!\n");
|
| 256 |
return -1; |
| 257 |
} |
| 258 |
|
| 259 |
if (get_bits1(&ctx->gb))
|
| 260 |
skip_bits_long(&ctx->gb, 24); /* skip transparency fill color */ |
| 261 |
} |
| 262 |
|
| 263 |
align_get_bits(&ctx->gb); |
| 264 |
|
| 265 |
skip_bits(&ctx->gb, 23); /* FIXME: unknown meaning */ |
| 266 |
|
| 267 |
/* skip GOP extension if any */
|
| 268 |
if (get_bits1(&ctx->gb)) {
|
| 269 |
do {
|
| 270 |
i = get_bits(&ctx->gb, 16);
|
| 271 |
} while (i & 0x8000); |
| 272 |
} |
| 273 |
|
| 274 |
align_get_bits(&ctx->gb); |
| 275 |
|
| 276 |
return 0; |
| 277 |
} |
| 278 |
|
| 279 |
|
| 280 |
/**
|
| 281 |
* Skips a header extension.
|
| 282 |
*
|
| 283 |
* @param gb [in,out] the GetBit context
|
| 284 |
*/
|
| 285 |
static inline void skip_hdr_extension(GetBitContext *gb) |
| 286 |
{
|
| 287 |
int i, len;
|
| 288 |
|
| 289 |
do {
|
| 290 |
len = get_bits(gb, 8);
|
| 291 |
for (i = 0; i < len; i++) skip_bits(gb, 8); |
| 292 |
} while(len);
|
| 293 |
} |
| 294 |
|
| 295 |
|
| 296 |
/**
|
| 297 |
* Decodes Indeo5 picture header.
|
| 298 |
*
|
| 299 |
* @param ctx [in,out] ptr to the decoder context
|
| 300 |
* @param avctx [in] ptr to the AVCodecContext
|
| 301 |
* @return result code: 0 = OK, -1 = error
|
| 302 |
*/
|
| 303 |
static int decode_pic_hdr(IVI5DecContext *ctx, AVCodecContext *avctx) |
| 304 |
{
|
| 305 |
if (get_bits(&ctx->gb, 5) != 0x1F) { |
| 306 |
av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
|
| 307 |
return -1; |
| 308 |
} |
| 309 |
|
| 310 |
ctx->prev_frame_type = ctx->frame_type; |
| 311 |
ctx->frame_type = get_bits(&ctx->gb, 3);
|
| 312 |
if (ctx->frame_type >= 5) { |
| 313 |
av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d \n", ctx->frame_type);
|
| 314 |
return -1; |
| 315 |
} |
| 316 |
|
| 317 |
ctx->frame_num = get_bits(&ctx->gb, 8);
|
| 318 |
|
| 319 |
if (ctx->frame_type == FRAMETYPE_INTRA) {
|
| 320 |
if (decode_gop_header(ctx, avctx))
|
| 321 |
return -1; |
| 322 |
} |
| 323 |
|
| 324 |
if (ctx->frame_type != FRAMETYPE_NULL) {
|
| 325 |
ctx->frame_flags = get_bits(&ctx->gb, 8);
|
| 326 |
|
| 327 |
ctx->pic_hdr_size = (ctx->frame_flags & 1) ? get_bits_long(&ctx->gb, 24) : 0; |
| 328 |
|
| 329 |
ctx->checksum = (ctx->frame_flags & 0x10) ? get_bits(&ctx->gb, 16) : 0; |
| 330 |
|
| 331 |
/* skip unknown extension if any */
|
| 332 |
if (ctx->frame_flags & 0x20) |
| 333 |
skip_hdr_extension(&ctx->gb); /* XXX: untested */
|
| 334 |
|
| 335 |
/* decode macroblock huffman codebook */
|
| 336 |
if (ff_ivi_dec_huff_desc(&ctx->gb, ctx->frame_flags & 0x40, IVI_MB_HUFF, &ctx->mb_vlc, avctx)) |
| 337 |
return -1; |
| 338 |
|
| 339 |
skip_bits(&ctx->gb, 3); /* FIXME: unknown meaning! */ |
| 340 |
} |
| 341 |
|
| 342 |
align_get_bits(&ctx->gb); |
| 343 |
|
| 344 |
return 0; |
| 345 |
} |
| 346 |
|
| 347 |
|
| 348 |
/**
|
| 349 |
* Decodes Indeo5 band header.
|
| 350 |
*
|
| 351 |
* @param ctx [in,out] ptr to the decoder context
|
| 352 |
* @param band [in,out] ptr to the band descriptor
|
| 353 |
* @param avctx [in] ptr to the AVCodecContext
|
| 354 |
* @return result code: 0 = OK, -1 = error
|
| 355 |
*/
|
| 356 |
static int decode_band_hdr(IVI5DecContext *ctx, IVIBandDesc *band, |
| 357 |
AVCodecContext *avctx) |
| 358 |
{
|
| 359 |
int i;
|
| 360 |
uint8_t band_flags; |
| 361 |
|
| 362 |
band_flags = get_bits(&ctx->gb, 8);
|
| 363 |
|
| 364 |
if (band_flags & 1) { |
| 365 |
band->is_empty = 1;
|
| 366 |
return 0; |
| 367 |
} |
| 368 |
|
| 369 |
band->data_size = (ctx->frame_flags & 0x80) ? get_bits_long(&ctx->gb, 24) : 0; |
| 370 |
|
| 371 |
band->inherit_mv = band_flags & 2;
|
| 372 |
band->inherit_qdelta = band_flags & 8;
|
| 373 |
band->qdelta_present = band_flags & 4;
|
| 374 |
if (!band->qdelta_present) band->inherit_qdelta = 1; |
| 375 |
|
| 376 |
/* decode rvmap probability corrections if any */
|
| 377 |
band->num_corr = 0; /* there are no corrections */ |
| 378 |
if (band_flags & 0x10) { |
| 379 |
band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */ |
| 380 |
if (band->num_corr > 61) { |
| 381 |
av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
|
| 382 |
band->num_corr); |
| 383 |
return -1; |
| 384 |
} |
| 385 |
|
| 386 |
/* read correction pairs */
|
| 387 |
for (i = 0; i < band->num_corr * 2; i++) |
| 388 |
band->corr[i] = get_bits(&ctx->gb, 8);
|
| 389 |
} |
| 390 |
|
| 391 |
/* select appropriate rvmap table for this band */
|
| 392 |
band->rvmap_sel = (band_flags & 0x40) ? get_bits(&ctx->gb, 3) : 8; |
| 393 |
|
| 394 |
/* decode block huffman codebook */
|
| 395 |
if (ff_ivi_dec_huff_desc(&ctx->gb, band_flags & 0x80, IVI_BLK_HUFF, &band->blk_vlc, avctx)) |
| 396 |
return -1; |
| 397 |
|
| 398 |
band->checksum_present = get_bits1(&ctx->gb); |
| 399 |
if (band->checksum_present)
|
| 400 |
band->checksum = get_bits(&ctx->gb, 16);
|
| 401 |
|
| 402 |
band->glob_quant = get_bits(&ctx->gb, 5);
|
| 403 |
|
| 404 |
/* skip unknown extension if any */
|
| 405 |
if (band_flags & 0x20) { /* XXX: untested */ |
| 406 |
align_get_bits(&ctx->gb); |
| 407 |
skip_hdr_extension(&ctx->gb); |
| 408 |
} |
| 409 |
|
| 410 |
align_get_bits(&ctx->gb); |
| 411 |
|
| 412 |
return 0; |
| 413 |
} |
| 414 |
|
| 415 |
|
| 416 |
/**
|
| 417 |
* Decodes info (block type, cbp, quant delta, motion vector)
|
| 418 |
* for all macroblocks in the current tile.
|
| 419 |
*
|
| 420 |
* @param ctx [in,out] ptr to the decoder context
|
| 421 |
* @param band [in,out] ptr to the band descriptor
|
| 422 |
* @param tile [in,out] ptr to the tile descriptor
|
| 423 |
* @param avctx [in] ptr to the AVCodecContext
|
| 424 |
* @return result code: 0 = OK, -1 = error
|
| 425 |
*/
|
| 426 |
static int decode_mb_info(IVI5DecContext *ctx, IVIBandDesc *band, |
| 427 |
IVITile *tile, AVCodecContext *avctx) |
| 428 |
{
|
| 429 |
int x, y, mv_x, mv_y, mv_delta, offs, mb_offset,
|
| 430 |
mv_scale, blks_per_mb; |
| 431 |
IVIMbInfo *mb, *ref_mb; |
| 432 |
int row_offset = band->mb_size * band->pitch;
|
| 433 |
|
| 434 |
mb = tile->mbs; |
| 435 |
ref_mb = tile->ref_mbs; |
| 436 |
offs = tile->ypos * band->pitch + tile->xpos; |
| 437 |
|
| 438 |
/* scale factor for motion vectors */
|
| 439 |
mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3); |
| 440 |
mv_x = mv_y = 0;
|
| 441 |
|
| 442 |
for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
|
| 443 |
mb_offset = offs; |
| 444 |
|
| 445 |
for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->mb_size) {
|
| 446 |
mb->xpos = x; |
| 447 |
mb->ypos = y; |
| 448 |
mb->buf_offs = mb_offset; |
| 449 |
|
| 450 |
if (get_bits1(&ctx->gb)) {
|
| 451 |
if (ctx->frame_type == FRAMETYPE_INTRA) {
|
| 452 |
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
|
| 453 |
return -1; |
| 454 |
} |
| 455 |
mb->type = 1; /* empty macroblocks are always INTER */ |
| 456 |
mb->cbp = 0; /* all blocks are empty */ |
| 457 |
|
| 458 |
mb->q_delta = 0;
|
| 459 |
if (!band->plane && !band->band_num && (ctx->frame_flags & 8)) { |
| 460 |
mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 461 |
IVI_VLC_BITS, 1);
|
| 462 |
mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
| 463 |
} |
| 464 |
|
| 465 |
mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ |
| 466 |
if (band->inherit_mv){
|
| 467 |
/* motion vector inheritance */
|
| 468 |
if (mv_scale) {
|
| 469 |
mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
| 470 |
mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
| 471 |
} else {
|
| 472 |
mb->mv_x = ref_mb->mv_x; |
| 473 |
mb->mv_y = ref_mb->mv_y; |
| 474 |
} |
| 475 |
} |
| 476 |
} else {
|
| 477 |
if (band->inherit_mv) {
|
| 478 |
mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */
|
| 479 |
} else if (ctx->frame_type == FRAMETYPE_INTRA) { |
| 480 |
mb->type = 0; /* mb_type is always INTRA for intra-frames */ |
| 481 |
} else {
|
| 482 |
mb->type = get_bits1(&ctx->gb); |
| 483 |
} |
| 484 |
|
| 485 |
blks_per_mb = band->mb_size != band->blk_size ? 4 : 1; |
| 486 |
mb->cbp = get_bits(&ctx->gb, blks_per_mb); |
| 487 |
|
| 488 |
mb->q_delta = 0;
|
| 489 |
if (band->qdelta_present) {
|
| 490 |
if (band->inherit_qdelta) {
|
| 491 |
if (ref_mb) mb->q_delta = ref_mb->q_delta;
|
| 492 |
} else if (mb->cbp || (!band->plane && !band->band_num && |
| 493 |
(ctx->frame_flags & 8))) {
|
| 494 |
mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 495 |
IVI_VLC_BITS, 1);
|
| 496 |
mb->q_delta = IVI_TOSIGNED(mb->q_delta); |
| 497 |
} |
| 498 |
} |
| 499 |
|
| 500 |
if (!mb->type) {
|
| 501 |
mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ |
| 502 |
} else {
|
| 503 |
if (band->inherit_mv){
|
| 504 |
/* motion vector inheritance */
|
| 505 |
if (mv_scale) {
|
| 506 |
mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); |
| 507 |
mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale); |
| 508 |
} else {
|
| 509 |
mb->mv_x = ref_mb->mv_x; |
| 510 |
mb->mv_y = ref_mb->mv_y; |
| 511 |
} |
| 512 |
} else {
|
| 513 |
/* decode motion vector deltas */
|
| 514 |
mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 515 |
IVI_VLC_BITS, 1);
|
| 516 |
mv_y += IVI_TOSIGNED(mv_delta); |
| 517 |
mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table, |
| 518 |
IVI_VLC_BITS, 1);
|
| 519 |
mv_x += IVI_TOSIGNED(mv_delta); |
| 520 |
mb->mv_x = mv_x; |
| 521 |
mb->mv_y = mv_y; |
| 522 |
} |
| 523 |
} |
| 524 |
} |
| 525 |
|
| 526 |
mb++; |
| 527 |
if (ref_mb)
|
| 528 |
ref_mb++; |
| 529 |
mb_offset += band->mb_size; |
| 530 |
} |
| 531 |
|
| 532 |
offs += row_offset; |
| 533 |
} |
| 534 |
|
| 535 |
align_get_bits(&ctx->gb); |
| 536 |
|
| 537 |
return 0; |
| 538 |
} |
| 539 |
|
| 540 |
|
| 541 |
/**
|
| 542 |
* Decodes an Indeo5 band.
|
| 543 |
*
|
| 544 |
* @param ctx [in,out] ptr to the decoder context
|
| 545 |
* @param band [in,out] ptr to the band descriptor
|
| 546 |
* @param avctx [in] ptr to the AVCodecContext
|
| 547 |
* @return result code: 0 = OK, -1 = error
|
| 548 |
*/
|
| 549 |
static int decode_band(IVI5DecContext *ctx, int plane_num, |
| 550 |
IVIBandDesc *band, AVCodecContext *avctx) |
| 551 |
{
|
| 552 |
int result, i, t, idx1, idx2, pos;
|
| 553 |
IVITile *tile; |
| 554 |
|
| 555 |
band->buf = band->bufs[ctx->dst_buf]; |
| 556 |
band->ref_buf = band->bufs[ctx->ref_buf]; |
| 557 |
band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
|
| 558 |
|
| 559 |
result = decode_band_hdr(ctx, band, avctx); |
| 560 |
if (result) {
|
| 561 |
av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
|
| 562 |
result); |
| 563 |
return -1; |
| 564 |
} |
| 565 |
|
| 566 |
if (band->is_empty) {
|
| 567 |
av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
|
| 568 |
return -1; |
| 569 |
} |
| 570 |
|
| 571 |
if (band->blk_size == 8) { |
| 572 |
band->intra_base = &ivi5_base_quant_8x8_intra[band->quant_mat][0];
|
| 573 |
band->inter_base = &ivi5_base_quant_8x8_inter[band->quant_mat][0];
|
| 574 |
band->intra_scale = &ivi5_scale_quant_8x8_intra[band->quant_mat][0];
|
| 575 |
band->inter_scale = &ivi5_scale_quant_8x8_inter[band->quant_mat][0];
|
| 576 |
} else {
|
| 577 |
band->intra_base = ivi5_base_quant_4x4_intra; |
| 578 |
band->inter_base = ivi5_base_quant_4x4_inter; |
| 579 |
band->intra_scale = ivi5_scale_quant_4x4_intra; |
| 580 |
band->inter_scale = ivi5_scale_quant_4x4_inter; |
| 581 |
} |
| 582 |
|
| 583 |
band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel]; |
| 584 |
|
| 585 |
/* apply corrections to the selected rvmap table if present */
|
| 586 |
for (i = 0; i < band->num_corr; i++) { |
| 587 |
idx1 = band->corr[i*2];
|
| 588 |
idx2 = band->corr[i*2+1]; |
| 589 |
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); |
| 590 |
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); |
| 591 |
} |
| 592 |
|
| 593 |
pos = get_bits_count(&ctx->gb); |
| 594 |
|
| 595 |
for (t = 0; t < band->num_tiles; t++) { |
| 596 |
tile = &band->tiles[t]; |
| 597 |
|
| 598 |
tile->is_empty = get_bits1(&ctx->gb); |
| 599 |
if (tile->is_empty) {
|
| 600 |
ff_ivi_process_empty_tile(avctx, band, tile, |
| 601 |
(ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3)); |
| 602 |
} else {
|
| 603 |
tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb); |
| 604 |
|
| 605 |
result = decode_mb_info(ctx, band, tile, avctx); |
| 606 |
if (result < 0) |
| 607 |
break;
|
| 608 |
|
| 609 |
result = ff_ivi_decode_blocks(&ctx->gb, band, tile); |
| 610 |
if (result < 0 || (get_bits_count(&ctx->gb) - pos) >> 3 != tile->data_size) { |
| 611 |
av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
|
| 612 |
break;
|
| 613 |
} |
| 614 |
pos += tile->data_size << 3; // skip to next tile |
| 615 |
} |
| 616 |
} |
| 617 |
|
| 618 |
/* restore the selected rvmap table by applying its corrections in reverse order */
|
| 619 |
for (i = band->num_corr-1; i >= 0; i--) { |
| 620 |
idx1 = band->corr[i*2];
|
| 621 |
idx2 = band->corr[i*2+1]; |
| 622 |
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]); |
| 623 |
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]); |
| 624 |
} |
| 625 |
|
| 626 |
#if IVI_DEBUG
|
| 627 |
if (band->checksum_present) {
|
| 628 |
uint16_t chksum = ivi_calc_band_checksum(band); |
| 629 |
if (chksum != band->checksum) {
|
| 630 |
av_log(avctx, AV_LOG_ERROR, |
| 631 |
"Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
|
| 632 |
band->plane, band->band_num, band->checksum, chksum); |
| 633 |
} |
| 634 |
} |
| 635 |
#endif
|
| 636 |
|
| 637 |
align_get_bits(&ctx->gb); |
| 638 |
|
| 639 |
return result;
|
| 640 |
} |
| 641 |
|
| 642 |
|
| 643 |
/**
|
| 644 |
* Switches buffers.
|
| 645 |
*
|
| 646 |
* @param ctx [in,out] ptr to the decoder context
|
| 647 |
* @param avctx [in] ptr to the AVCodecContext
|
| 648 |
*/
|
| 649 |
static void switch_buffers(IVI5DecContext *ctx, AVCodecContext *avctx) |
| 650 |
{
|
| 651 |
switch (ctx->frame_type) {
|
| 652 |
case FRAMETYPE_INTRA:
|
| 653 |
ctx->buf_switch = 0;
|
| 654 |
ctx->dst_buf = 0;
|
| 655 |
ctx->ref_buf = 0;
|
| 656 |
break;
|
| 657 |
case FRAMETYPE_INTER:
|
| 658 |
ctx->buf_switch &= 1;
|
| 659 |
/* swap buffers only if there were no droppable frames */
|
| 660 |
if (ctx->prev_frame_type != FRAMETYPE_INTER_NOREF &&
|
| 661 |
ctx->prev_frame_type != FRAMETYPE_INTER_SCAL) |
| 662 |
ctx->buf_switch ^= 1;
|
| 663 |
ctx->dst_buf = ctx->buf_switch; |
| 664 |
ctx->ref_buf = ctx->buf_switch ^ 1;
|
| 665 |
break;
|
| 666 |
case FRAMETYPE_INTER_SCAL:
|
| 667 |
if (ctx->prev_frame_type == FRAMETYPE_INTER_NOREF)
|
| 668 |
break;
|
| 669 |
if (ctx->prev_frame_type != FRAMETYPE_INTER_SCAL) {
|
| 670 |
ctx->buf_switch ^= 1;
|
| 671 |
ctx->dst_buf = ctx->buf_switch; |
| 672 |
ctx->ref_buf = ctx->buf_switch ^ 1;
|
| 673 |
} else {
|
| 674 |
ctx->buf_switch ^= 2;
|
| 675 |
ctx->dst_buf = 2;
|
| 676 |
ctx->ref_buf = ctx->buf_switch & 1;
|
| 677 |
if (!(ctx->buf_switch & 2)) |
| 678 |
FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
|
| 679 |
} |
| 680 |
break;
|
| 681 |
case FRAMETYPE_INTER_NOREF:
|
| 682 |
if (ctx->prev_frame_type == FRAMETYPE_INTER_SCAL) {
|
| 683 |
ctx->buf_switch ^= 2;
|
| 684 |
ctx->dst_buf = 2;
|
| 685 |
ctx->ref_buf = ctx->buf_switch & 1;
|
| 686 |
if (!(ctx->buf_switch & 2)) |
| 687 |
FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
|
| 688 |
} else {
|
| 689 |
ctx->buf_switch ^= 1;
|
| 690 |
ctx->dst_buf = ctx->buf_switch & 1;
|
| 691 |
ctx->ref_buf = (ctx->buf_switch & 1) ^ 1; |
| 692 |
} |
| 693 |
break;
|
| 694 |
case FRAMETYPE_NULL:
|
| 695 |
return;
|
| 696 |
default:
|
| 697 |
av_log(avctx, AV_LOG_ERROR, "unsupported frame type: %d\n", ctx->frame_type);
|
| 698 |
} |
| 699 |
} |
| 700 |
|
| 701 |
|
| 702 |
/**
|
| 703 |
* Initializes Indeo5 decoder.
|
| 704 |
*/
|
| 705 |
static av_cold int decode_init(AVCodecContext *avctx) |
| 706 |
{
|
| 707 |
IVI5DecContext *ctx = avctx->priv_data; |
| 708 |
int result;
|
| 709 |
|
| 710 |
ff_ivi_init_static_vlc(); |
| 711 |
|
| 712 |
/* copy rvmap tables in our context so we can apply changes to them */
|
| 713 |
memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
|
| 714 |
|
| 715 |
/* set the initial picture layout according to the basic profile:
|
| 716 |
there is only one band per plane (no scalability), only one tile (no local decoding)
|
| 717 |
and picture format = YVU9 */
|
| 718 |
ctx->pic_conf.pic_width = avctx->width; |
| 719 |
ctx->pic_conf.pic_height = avctx->height; |
| 720 |
ctx->pic_conf.chroma_width = (avctx->width + 3) >> 2; |
| 721 |
ctx->pic_conf.chroma_height = (avctx->height + 3) >> 2; |
| 722 |
ctx->pic_conf.tile_width = avctx->width; |
| 723 |
ctx->pic_conf.tile_height = avctx->height; |
| 724 |
ctx->pic_conf.luma_bands = ctx->pic_conf.chroma_bands = 1;
|
| 725 |
|
| 726 |
result = ff_ivi_init_planes(ctx->planes, &ctx->pic_conf); |
| 727 |
if (result) {
|
| 728 |
av_log(avctx, AV_LOG_ERROR, "Couldn't allocate color planes!\n");
|
| 729 |
return -1; |
| 730 |
} |
| 731 |
|
| 732 |
avctx->pix_fmt = PIX_FMT_YUV410P; |
| 733 |
|
| 734 |
return 0; |
| 735 |
} |
| 736 |
|
| 737 |
|
| 738 |
/**
|
| 739 |
* main decoder function
|
| 740 |
*/
|
| 741 |
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, |
| 742 |
AVPacket *avpkt) |
| 743 |
{
|
| 744 |
IVI5DecContext *ctx = avctx->priv_data; |
| 745 |
const uint8_t *buf = avpkt->data;
|
| 746 |
int buf_size = avpkt->size;
|
| 747 |
int result, p, b;
|
| 748 |
|
| 749 |
init_get_bits(&ctx->gb, buf, buf_size * 8);
|
| 750 |
ctx->frame_data = buf; |
| 751 |
ctx->frame_size = buf_size; |
| 752 |
|
| 753 |
result = decode_pic_hdr(ctx, avctx); |
| 754 |
if (result) {
|
| 755 |
av_log(avctx, AV_LOG_ERROR, |
| 756 |
"Error while decoding picture header: %d\n", result);
|
| 757 |
return -1; |
| 758 |
} |
| 759 |
|
| 760 |
if (ctx->gop_flags & IVI5_IS_PROTECTED) {
|
| 761 |
av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
|
| 762 |
return -1; |
| 763 |
} |
| 764 |
|
| 765 |
switch_buffers(ctx, avctx); |
| 766 |
|
| 767 |
//START_TIMER;
|
| 768 |
|
| 769 |
if (ctx->frame_type == FRAMETYPE_NULL) {
|
| 770 |
ctx->frame_type = ctx->prev_frame_type; |
| 771 |
} else {
|
| 772 |
for (p = 0; p < 3; p++) { |
| 773 |
for (b = 0; b < ctx->planes[p].num_bands; b++) { |
| 774 |
result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx); |
| 775 |
if (result) {
|
| 776 |
av_log(avctx, AV_LOG_ERROR, |
| 777 |
"Error while decoding band: %d, plane: %d\n", b, p);
|
| 778 |
return -1; |
| 779 |
} |
| 780 |
} |
| 781 |
} |
| 782 |
} |
| 783 |
|
| 784 |
//STOP_TIMER("decode_planes");
|
| 785 |
|
| 786 |
if (ctx->frame.data[0]) |
| 787 |
avctx->release_buffer(avctx, &ctx->frame); |
| 788 |
|
| 789 |
ctx->frame.reference = 0;
|
| 790 |
if (avctx->get_buffer(avctx, &ctx->frame) < 0) { |
| 791 |
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
| 792 |
return -1; |
| 793 |
} |
| 794 |
|
| 795 |
if (ctx->is_scalable) {
|
| 796 |
ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4); |
| 797 |
} else {
|
| 798 |
ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]); |
| 799 |
} |
| 800 |
|
| 801 |
ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]); |
| 802 |
ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]); |
| 803 |
|
| 804 |
*data_size = sizeof(AVFrame);
|
| 805 |
*(AVFrame*)data = ctx->frame; |
| 806 |
|
| 807 |
return buf_size;
|
| 808 |
} |
| 809 |
|
| 810 |
|
| 811 |
/**
|
| 812 |
* Closes Indeo5 decoder and cleans up its context.
|
| 813 |
*/
|
| 814 |
static av_cold int decode_close(AVCodecContext *avctx) |
| 815 |
{
|
| 816 |
IVI5DecContext *ctx = avctx->priv_data; |
| 817 |
|
| 818 |
ff_ivi_free_buffers(&ctx->planes[0]);
|
| 819 |
|
| 820 |
if (ctx->mb_vlc.cust_tab.table)
|
| 821 |
free_vlc(&ctx->mb_vlc.cust_tab); |
| 822 |
|
| 823 |
if (ctx->frame.data[0]) |
| 824 |
avctx->release_buffer(avctx, &ctx->frame); |
| 825 |
|
| 826 |
return 0; |
| 827 |
} |
| 828 |
|
| 829 |
|
| 830 |
AVCodec indeo5_decoder = {
|
| 831 |
.name = "indeo5",
|
| 832 |
.type = CODEC_TYPE_VIDEO, |
| 833 |
.id = CODEC_ID_INDEO5, |
| 834 |
.priv_data_size = sizeof(IVI5DecContext),
|
| 835 |
.init = decode_init, |
| 836 |
.close = decode_close, |
| 837 |
.decode = decode_frame, |
| 838 |
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
|
| 839 |
}; |