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ivi.c
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/*
* common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
*
* Copyright (c) 2009 Maxim Poliakovski
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* This file contains functions and data shared by both Indeo4 and
* Indeo5 decoders.
*/
#include <inttypes.h>
#include "libavutil/attributes.h"
#include "libavutil/imgutils.h"
#include "libavutil/timer.h"
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
#include "ivi.h"
#include "ivi_dsp.h"
/**
* These are 2x8 predefined Huffman codebooks for coding macroblock/block
* signals. They are specified using "huffman descriptors" in order to
* avoid huge static tables. The decoding tables will be generated at
* startup from these descriptors.
*/
/** static macroblock huffman tables */
static const IVIHuffDesc ivi_mb_huff_desc[8] = {
{8, {0, 4, 5, 4, 4, 4, 6, 6}},
{12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}},
{12, {0, 2, 3, 4, 3, 3, 3, 3, 4, 3, 2, 2}},
{12, {0, 3, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2}},
{13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}},
{9, {0, 4, 4, 4, 4, 3, 3, 3, 2}},
{10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}},
{12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}}
};
/** static block huffman tables */
static const IVIHuffDesc ivi_blk_huff_desc[8] = {
{10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}},
{11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}},
{12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}},
{13, {3, 3, 4, 4, 5, 6, 6, 4, 4, 3, 2, 1, 1}},
{11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}},
{13, {3, 4, 5, 5, 5, 5, 6, 4, 3, 3, 2, 1, 1}},
{13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}},
{9, {3, 4, 4, 5, 5, 5, 6, 5, 5}}
};
static VLC ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
typedef void (*ivi_mc_func) (int16_t *buf, const int16_t *ref_buf,
ptrdiff_t pitch, int mc_type);
typedef void (*ivi_mc_avg_func) (int16_t *buf, const int16_t *ref_buf1,
const int16_t *ref_buf2,
ptrdiff_t pitch, int mc_type, int mc_type2);
static int ivi_mc(const IVIBandDesc *band, ivi_mc_func mc, ivi_mc_avg_func mc_avg,
int offs, int mv_x, int mv_y, int mv_x2, int mv_y2,
int mc_type, int mc_type2)
{
int ref_offs = offs + mv_y * band->pitch + mv_x;
int buf_size = band->pitch * band->aheight;
int min_size = band->pitch * (band->blk_size - 1) + band->blk_size;
int ref_size = (mc_type > 1) * band->pitch + (mc_type & 1);
if (mc_type != -1) {
av_assert0(offs >= 0 && ref_offs >= 0 && band->ref_buf);
av_assert0(buf_size - min_size >= offs);
av_assert0(buf_size - min_size - ref_size >= ref_offs);
}
if (mc_type2 == -1) {
mc(band->buf + offs, band->ref_buf + ref_offs, band->pitch, mc_type);
} else {
int ref_offs2 = offs + mv_y2 * band->pitch + mv_x2;
int ref_size2 = (mc_type2 > 1) * band->pitch + (mc_type2 & 1);
if (offs < 0 || ref_offs2 < 0 || !band->b_ref_buf)
return AVERROR_INVALIDDATA;
if (buf_size - min_size - ref_size2 < ref_offs2)
return AVERROR_INVALIDDATA;
if (mc_type == -1)
mc(band->buf + offs, band->b_ref_buf + ref_offs2,
band->pitch, mc_type2);
else
mc_avg(band->buf + offs, band->ref_buf + ref_offs,
band->b_ref_buf + ref_offs2, band->pitch,
mc_type, mc_type2);
}
return 0;
}
/**
* Reverse "nbits" bits of the value "val" and return the result
* in the least significant bits.
*/
static uint16_t inv_bits(uint16_t val, int nbits)
{
uint16_t res;
if (nbits <= 8) {
res = ff_reverse[val] >> (8 - nbits);
} else
res = ((ff_reverse[val & 0xFF] << 8) +
(ff_reverse[val >> 8])) >> (16 - nbits);
return res;
}
/*
* Generate a huffman codebook from the given descriptor
* and convert it into the FFmpeg VLC table.
*
* @param[in] cb pointer to codebook descriptor
* @param[out] vlc where to place the generated VLC table
* @param[in] flag flag: 1 - for static or 0 for dynamic tables
* @return result code: 0 - OK, -1 = error (invalid codebook descriptor)
*/
static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag)
{
int pos, i, j, codes_per_row, prefix, not_last_row;
uint16_t codewords[256]; /* FIXME: move this temporal storage out? */
uint8_t bits[256];
pos = 0; /* current position = 0 */
for (i = 0; i < cb->num_rows; i++) {
codes_per_row = 1 << cb->xbits[i];
not_last_row = (i != cb->num_rows - 1);
prefix = ((1 << i) - 1) << (cb->xbits[i] + not_last_row);
for (j = 0; j < codes_per_row; j++) {
if (pos >= 256) /* Some Indeo5 codebooks can have more than 256 */
break; /* elements, but only 256 codes are allowed! */
bits[pos] = i + cb->xbits[i] + not_last_row;
if (bits[pos] > IVI_VLC_BITS)
return AVERROR_INVALIDDATA; /* invalid descriptor */
codewords[pos] = inv_bits((prefix | j), bits[pos]);
if (!bits[pos])
bits[pos] = 1;
pos++;
}//for j
}//for i
/* number of codewords = pos */
return init_vlc(vlc, IVI_VLC_BITS, pos, bits, 1, 1, codewords, 2, 2,
(flag ? INIT_VLC_USE_NEW_STATIC : 0) | INIT_VLC_LE);
}
av_cold void ff_ivi_init_static_vlc(void)
{
int i;
static VLC_TYPE table_data[8192 * 16][2];
static int initialized_vlcs = 0;
if (initialized_vlcs)
return;
for (i = 0; i < 8; i++) {
ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
ivi_mb_vlc_tabs[i].table_allocated = 8192;
ivi_create_huff_from_desc(&ivi_mb_huff_desc[i],
&ivi_mb_vlc_tabs[i], 1);
ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
ivi_blk_vlc_tabs[i].table_allocated = 8192;
ivi_create_huff_from_desc(&ivi_blk_huff_desc[i],
&ivi_blk_vlc_tabs[i], 1);
}
initialized_vlcs = 1;
}
/*
* Copy huffman codebook descriptors.
*
* @param[out] dst ptr to the destination descriptor
* @param[in] src ptr to the source descriptor
*/
static void ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)
{
dst->num_rows = src->num_rows;
memcpy(dst->xbits, src->xbits, src->num_rows);
}
/*
* Compare two huffman codebook descriptors.
*
* @param[in] desc1 ptr to the 1st descriptor to compare
* @param[in] desc2 ptr to the 2nd descriptor to compare
* @return comparison result: 0 - equal, 1 - not equal
*/
static int ivi_huff_desc_cmp(const IVIHuffDesc *desc1,
const IVIHuffDesc *desc2)
{
return desc1->num_rows != desc2->num_rows ||
memcmp(desc1->xbits, desc2->xbits, desc1->num_rows);
}
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx)
{
int i, result;
IVIHuffDesc new_huff;
if (!desc_coded) {
/* select default table */
huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[7]
: &ivi_mb_vlc_tabs [7];
return 0;
}
huff_tab->tab_sel = get_bits(gb, 3);
if (huff_tab->tab_sel == 7) {
/* custom huffman table (explicitly encoded) */
new_huff.num_rows = get_bits(gb, 4);
if (!new_huff.num_rows) {
av_log(avctx, AV_LOG_ERROR, "Empty custom Huffman table!\n");
return AVERROR_INVALIDDATA;
}
for (i = 0; i < new_huff.num_rows; i++)
new_huff.xbits[i] = get_bits(gb, 4);
/* Have we got the same custom table? Rebuild if not. */
if (ivi_huff_desc_cmp(&new_huff, &huff_tab->cust_desc) || !huff_tab->cust_tab.table) {
ivi_huff_desc_copy(&huff_tab->cust_desc, &new_huff);
if (huff_tab->cust_tab.table)
ff_free_vlc(&huff_tab->cust_tab);
result = ivi_create_huff_from_desc(&huff_tab->cust_desc,
&huff_tab->cust_tab, 0);
if (result) {
// reset faulty description
huff_tab->cust_desc.num_rows = 0;
av_log(avctx, AV_LOG_ERROR,
"Error while initializing custom vlc table!\n");
return result;
}
}
huff_tab->tab = &huff_tab->cust_tab;
} else {
/* select one of predefined tables */
huff_tab->tab = (which_tab) ? &ivi_blk_vlc_tabs[huff_tab->tab_sel]
: &ivi_mb_vlc_tabs [huff_tab->tab_sel];
}
return 0;
}
/*
* Free planes, bands and macroblocks buffers.
*
* @param[in] planes pointer to the array of the plane descriptors
*/
static av_cold void ivi_free_buffers(IVIPlaneDesc *planes)
{
int p, b, t;
for (p = 0; p < 3; p++) {
if (planes[p].bands)
for (b = 0; b < planes[p].num_bands; b++) {
av_freep(&planes[p].bands[b].bufs[0]);
av_freep(&planes[p].bands[b].bufs[1]);
av_freep(&planes[p].bands[b].bufs[2]);
av_freep(&planes[p].bands[b].bufs[3]);
if (planes[p].bands[b].blk_vlc.cust_tab.table)
ff_free_vlc(&planes[p].bands[b].blk_vlc.cust_tab);
for (t = 0; t < planes[p].bands[b].num_tiles; t++)
av_freep(&planes[p].bands[b].tiles[t].mbs);
av_freep(&planes[p].bands[b].tiles);
}
av_freep(&planes[p].bands);
planes[p].num_bands = 0;
}
}
av_cold int ff_ivi_init_planes(AVCodecContext *avctx, IVIPlaneDesc *planes, const IVIPicConfig *cfg,
int is_indeo4)
{
int p, b;
uint32_t b_width, b_height, align_fac, width_aligned,
height_aligned, buf_size;
IVIBandDesc *band;
ivi_free_buffers(planes);
if (av_image_check_size2(cfg->pic_width, cfg->pic_height, avctx->max_pixels, AV_PIX_FMT_YUV410P, 0, avctx) < 0 ||
cfg->luma_bands < 1 || cfg->chroma_bands < 1)
return AVERROR_INVALIDDATA;
/* fill in the descriptor of the luminance plane */
planes[0].width = cfg->pic_width;
planes[0].height = cfg->pic_height;
planes[0].num_bands = cfg->luma_bands;
/* fill in the descriptors of the chrominance planes */
planes[1].width = planes[2].width = (cfg->pic_width + 3) >> 2;
planes[1].height = planes[2].height = (cfg->pic_height + 3) >> 2;
planes[1].num_bands = planes[2].num_bands = cfg->chroma_bands;
for (p = 0; p < 3; p++) {
planes[p].bands = av_mallocz_array(planes[p].num_bands, sizeof(IVIBandDesc));
if (!planes[p].bands)
return AVERROR(ENOMEM);
/* select band dimensions: if there is only one band then it
* has the full size, if there are several bands each of them
* has only half size */
b_width = planes[p].num_bands == 1 ? planes[p].width
: (planes[p].width + 1) >> 1;
b_height = planes[p].num_bands == 1 ? planes[p].height
: (planes[p].height + 1) >> 1;
/* luma band buffers will be aligned on 16x16 (max macroblock size) */
/* chroma band buffers will be aligned on 8x8 (max macroblock size) */
align_fac = p ? 8 : 16;
width_aligned = FFALIGN(b_width , align_fac);
height_aligned = FFALIGN(b_height, align_fac);
buf_size = width_aligned * height_aligned * sizeof(int16_t);
for (b = 0; b < planes[p].num_bands; b++) {
band = &planes[p].bands[b]; /* select appropriate plane/band */
band->plane = p;
band->band_num = b;
band->width = b_width;
band->height = b_height;
band->pitch = width_aligned;
band->aheight = height_aligned;
av_assert0(!band->bufs[0] && !band->bufs[1] &&
!band->bufs[2] && !band->bufs[3]);
band->bufsize = buf_size/2;
av_assert0(buf_size % 2 == 0);
/* reset custom vlc */
planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0;
}
}
return 0;
}
static int ivi_init_tiles(const IVIBandDesc *band, IVITile *ref_tile,
int p, int b, int t_height, int t_width)
{
int x, y;
IVITile *tile = band->tiles;
for (y = 0; y < band->height; y += t_height) {
for (x = 0; x < band->width; x += t_width) {
tile->xpos = x;
tile->ypos = y;
tile->mb_size = band->mb_size;
tile->width = FFMIN(band->width - x, t_width);
tile->height = FFMIN(band->height - y, t_height);
tile->is_empty = tile->data_size = 0;
/* calculate number of macroblocks */
tile->num_MBs = IVI_MBs_PER_TILE(tile->width, tile->height,
band->mb_size);
av_freep(&tile->mbs);
tile->mbs = av_mallocz_array(tile->num_MBs, sizeof(IVIMbInfo));
if (!tile->mbs)
return AVERROR(ENOMEM);
tile->ref_mbs = 0;
if (p || b) {
if (tile->num_MBs != ref_tile->num_MBs) {
av_log(NULL, AV_LOG_DEBUG, "ref_tile mismatch\n");
return AVERROR_INVALIDDATA;
}
tile->ref_mbs = ref_tile->mbs;
ref_tile++;
}
tile++;
}
}
return 0;
}
av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes,
int tile_width, int tile_height)
{
int p, b, x_tiles, y_tiles, t_width, t_height, ret;
IVIBandDesc *band;
for (p = 0; p < 3; p++) {
t_width = !p ? tile_width : (tile_width + 3) >> 2;
t_height = !p ? tile_height : (tile_height + 3) >> 2;
if (!p && planes[0].num_bands == 4) {
if (t_width % 2 || t_height % 2) {
avpriv_request_sample(NULL, "Odd tiles");
return AVERROR_PATCHWELCOME;
}
t_width >>= 1;
t_height >>= 1;
}
if(t_width<=0 || t_height<=0)
return AVERROR(EINVAL);
for (b = 0; b < planes[p].num_bands; b++) {
band = &planes[p].bands[b];
if (band->tiles) {
int t;
for (t = 0; t < band->num_tiles; t++) {
av_freep(&band->tiles[t].mbs);
}
}
x_tiles = IVI_NUM_TILES(band->width, t_width);
y_tiles = IVI_NUM_TILES(band->height, t_height);
band->num_tiles = x_tiles * y_tiles;
av_freep(&band->tiles);
band->tiles = av_mallocz_array(band->num_tiles, sizeof(IVITile));
if (!band->tiles)
return AVERROR(ENOMEM);
/* use the first luma band as reference for motion vectors
* and quant */
ret = ivi_init_tiles(band, planes[0].bands[0].tiles,
p, b, t_height, t_width);
if (ret < 0)
return ret;
}
}
return 0;
}
/*
* Decode size of the tile data.
* The size is stored as a variable-length field having the following format:
* if (tile_data_size < 255) than this field is only one byte long
* if (tile_data_size >= 255) than this field four is byte long: 0xFF X1 X2 X3
* where X1-X3 is size of the tile data
*
* @param[in,out] gb the GetBit context
* @return size of the tile data in bytes
*/
static int ivi_dec_tile_data_size(GetBitContext *gb)
{
int len;
len = 0;
if (get_bits1(gb)) {
len = get_bits(gb, 8);
if (len == 255)
len = get_bits(gb, 24);
}
/* align the bitstream reader on the byte boundary */
align_get_bits(gb);
return len;
}
static int ivi_dc_transform(const IVIBandDesc *band, int *prev_dc, int buf_offs,
int blk_size)
{
band->dc_transform(prev_dc, band->buf + buf_offs,
band->pitch, blk_size);
return 0;
}
static int ivi_decode_coded_blocks(GetBitContext *gb, const IVIBandDesc *band,
ivi_mc_func mc, ivi_mc_avg_func mc_avg,
int mv_x, int mv_y,
int mv_x2, int mv_y2,
int *prev_dc, int is_intra,
int mc_type, int mc_type2,
uint32_t quant, int offs,
AVCodecContext *avctx)
{
const uint16_t *base_tab = is_intra ? band->intra_base : band->inter_base;
RVMapDesc *rvmap = band->rv_map;
uint8_t col_flags[8];
int32_t trvec[64];
uint32_t sym = 0, lo, hi, q;
int pos, run, val;
int blk_size = band->blk_size;
int num_coeffs = blk_size * blk_size;
int col_mask = blk_size - 1;
int scan_pos = -1;
int min_size = band->pitch * (band->transform_size - 1) +
band->transform_size;
int buf_size = band->pitch * band->aheight - offs;
if (min_size > buf_size)
return AVERROR_INVALIDDATA;
if (!band->scan) {
av_log(avctx, AV_LOG_ERROR, "Scan pattern is not set.\n");
return AVERROR_INVALIDDATA;
}
/* zero transform vector */
memset(trvec, 0, num_coeffs * sizeof(trvec[0]));
/* zero column flags */
memset(col_flags, 0, sizeof(col_flags));
while (scan_pos <= num_coeffs) {
sym = get_vlc2(gb, band->blk_vlc.tab->table,
IVI_VLC_BITS, 1);
if (sym == rvmap->eob_sym)
break; /* End of block */
/* Escape - run/val explicitly coded using 3 vlc codes */
if (sym == rvmap->esc_sym) {
run = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1) + 1;
lo = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
hi = get_vlc2(gb, band->blk_vlc.tab->table, IVI_VLC_BITS, 1);
/* merge them and convert into signed val */
val = IVI_TOSIGNED((hi << 6) | lo);
} else {
if (sym >= 256U) {
av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %"PRIu32".\n", sym);
return AVERROR_INVALIDDATA;
}
run = rvmap->runtab[sym];
val = rvmap->valtab[sym];
}
/* de-zigzag and dequantize */
scan_pos += run;
if (scan_pos >= num_coeffs || scan_pos < 0)
break;
pos = band->scan[scan_pos];
if (!val)
ff_dlog(avctx, "Val = 0 encountered!\n");
q = (base_tab[pos] * quant) >> 9;
if (q > 1)
val = val * q + FFSIGN(val) * (((q ^ 1) - 1) >> 1);
trvec[pos] = val;
/* track columns containing non-zero coeffs */
col_flags[pos & col_mask] |= !!val;
}
if (scan_pos < 0 || scan_pos >= num_coeffs && sym != rvmap->eob_sym)
return AVERROR_INVALIDDATA; /* corrupt block data */
/* undoing DC coeff prediction for intra-blocks */
if (is_intra && band->is_2d_trans) {
*prev_dc += trvec[0];
trvec[0] = *prev_dc;
col_flags[0] |= !!*prev_dc;
}
if(band->transform_size > band->blk_size){
av_log(NULL, AV_LOG_ERROR, "Too large transform\n");
return AVERROR_INVALIDDATA;
}
/* apply inverse transform */
band->inv_transform(trvec, band->buf + offs,
band->pitch, col_flags);
/* apply motion compensation */
if (!is_intra)
return ivi_mc(band, mc, mc_avg, offs, mv_x, mv_y, mv_x2, mv_y2,
mc_type, mc_type2);
return 0;
}
/*
* Decode block data:
* extract huffman-coded transform coefficients from the bitstream,
* dequantize them, apply inverse transform and motion compensation
* in order to reconstruct the picture.
*
* @param[in,out] gb the GetBit context
* @param[in] band pointer to the band descriptor
* @param[in] tile pointer to the tile descriptor
* @return result code: 0 - OK, -1 = error (corrupted blocks data)
*/
static int ivi_decode_blocks(GetBitContext *gb, const IVIBandDesc *band,
IVITile *tile, AVCodecContext *avctx)
{
int mbn, blk, num_blocks, blk_size, ret, is_intra;
int mc_type = 0, mc_type2 = -1;
int mv_x = 0, mv_y = 0, mv_x2 = 0, mv_y2 = 0;
int32_t prev_dc;
uint32_t cbp, quant, buf_offs;
IVIMbInfo *mb;
ivi_mc_func mc_with_delta_func, mc_no_delta_func;
ivi_mc_avg_func mc_avg_with_delta_func, mc_avg_no_delta_func;
const uint8_t *scale_tab;
/* init intra prediction for the DC coefficient */
prev_dc = 0;
blk_size = band->blk_size;
/* number of blocks per mb */
num_blocks = (band->mb_size != blk_size) ? 4 : 1;
if (blk_size == 8) {
mc_with_delta_func = ff_ivi_mc_8x8_delta;
mc_no_delta_func = ff_ivi_mc_8x8_no_delta;
mc_avg_with_delta_func = ff_ivi_mc_avg_8x8_delta;
mc_avg_no_delta_func = ff_ivi_mc_avg_8x8_no_delta;
} else {
mc_with_delta_func = ff_ivi_mc_4x4_delta;
mc_no_delta_func = ff_ivi_mc_4x4_no_delta;
mc_avg_with_delta_func = ff_ivi_mc_avg_4x4_delta;
mc_avg_no_delta_func = ff_ivi_mc_avg_4x4_no_delta;
}
for (mbn = 0, mb = tile->mbs; mbn < tile->num_MBs; mb++, mbn++) {
is_intra = !mb->type;
cbp = mb->cbp;
buf_offs = mb->buf_offs;
quant = band->glob_quant + mb->q_delta;
if (avctx->codec_id == AV_CODEC_ID_INDEO4)
quant = av_clip_uintp2(quant, 5);
else
quant = av_clip(quant, 0, 23);
scale_tab = is_intra ? band->intra_scale : band->inter_scale;
if (scale_tab)
quant = scale_tab[quant];
if (!is_intra) {
mv_x = mb->mv_x;
mv_y = mb->mv_y;
mv_x2 = mb->b_mv_x;
mv_y2 = mb->b_mv_y;
if (band->is_halfpel) {
mc_type = ((mv_y & 1) << 1) | (mv_x & 1);
mc_type2 = ((mv_y2 & 1) << 1) | (mv_x2 & 1);
mv_x >>= 1;
mv_y >>= 1;
mv_x2 >>= 1;
mv_y2 >>= 1; /* convert halfpel vectors into fullpel ones */
}
if (mb->type == 2)
mc_type = -1;
if (mb->type != 2 && mb->type != 3)
mc_type2 = -1;
if (mb->type) {
int dmv_x, dmv_y, cx, cy;
dmv_x = mb->mv_x >> band->is_halfpel;
dmv_y = mb->mv_y >> band->is_halfpel;
cx = mb->mv_x & band->is_halfpel;
cy = mb->mv_y & band->is_halfpel;
if (mb->xpos + dmv_x < 0 ||
mb->xpos + dmv_x + band->mb_size + cx > band->pitch ||
mb->ypos + dmv_y < 0 ||
mb->ypos + dmv_y + band->mb_size + cy > band->aheight) {
return AVERROR_INVALIDDATA;
}
}
if (mb->type == 2 || mb->type == 3) {
int dmv_x, dmv_y, cx, cy;
dmv_x = mb->b_mv_x >> band->is_halfpel;
dmv_y = mb->b_mv_y >> band->is_halfpel;
cx = mb->b_mv_x & band->is_halfpel;
cy = mb->b_mv_y & band->is_halfpel;
if (mb->xpos + dmv_x < 0 ||
mb->xpos + dmv_x + band->mb_size + cx > band->pitch ||
mb->ypos + dmv_y < 0 ||
mb->ypos + dmv_y + band->mb_size + cy > band->aheight) {
return AVERROR_INVALIDDATA;
}
}
}
for (blk = 0; blk < num_blocks; blk++) {
/* adjust block position in the buffer according to its number */
if (blk & 1) {
buf_offs += blk_size;
} else if (blk == 2) {
buf_offs -= blk_size;
buf_offs += blk_size * band->pitch;
}
if (cbp & 1) { /* block coded ? */
ret = ivi_decode_coded_blocks(gb, band, mc_with_delta_func,
mc_avg_with_delta_func,
mv_x, mv_y, mv_x2, mv_y2,
&prev_dc, is_intra,
mc_type, mc_type2, quant,
buf_offs, avctx);
if (ret < 0)
return ret;
} else {
int buf_size = band->pitch * band->aheight - buf_offs;
int min_size = (blk_size - 1) * band->pitch + blk_size;
if (min_size > buf_size)
return AVERROR_INVALIDDATA;
/* block not coded */
/* for intra blocks apply the dc slant transform */
/* for inter - perform the motion compensation without delta */
if (is_intra) {
ret = ivi_dc_transform(band, &prev_dc, buf_offs, blk_size);
if (ret < 0)
return ret;
} else {
ret = ivi_mc(band, mc_no_delta_func, mc_avg_no_delta_func,
buf_offs, mv_x, mv_y, mv_x2, mv_y2,
mc_type, mc_type2);
if (ret < 0)
return ret;
}
}
cbp >>= 1;
}// for blk
}// for mbn
align_get_bits(gb);
return 0;
}
/**
* Handle empty tiles by performing data copying and motion
* compensation respectively.
*
* @param[in] avctx ptr to the AVCodecContext
* @param[in] band pointer to the band descriptor
* @param[in] tile pointer to the tile descriptor
* @param[in] mv_scale scaling factor for motion vectors
*/
static int ivi_process_empty_tile(AVCodecContext *avctx, const IVIBandDesc *band,
IVITile *tile, int32_t mv_scale)
{
int x, y, need_mc, mbn, blk, num_blocks, mv_x, mv_y, mc_type;
int offs, mb_offset, row_offset, ret;
IVIMbInfo *mb, *ref_mb;
const int16_t *src;
int16_t *dst;
ivi_mc_func mc_no_delta_func;
int clear_first = !band->qdelta_present && !band->plane && !band->band_num;
int mb_size = band->mb_size;
int xend = tile->xpos + tile->width;
int is_halfpel = band->is_halfpel;
int pitch = band->pitch;
if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, mb_size)) {
av_log(avctx, AV_LOG_ERROR, "Allocated tile size %d mismatches "
"parameters %d in ivi_process_empty_tile()\n",
tile->num_MBs, IVI_MBs_PER_TILE(tile->width, tile->height, mb_size));
return AVERROR_INVALIDDATA;
}
offs = tile->ypos * pitch + tile->xpos;
mb = tile->mbs;
ref_mb = tile->ref_mbs;
row_offset = mb_size * pitch;
need_mc = 0; /* reset the mc tracking flag */
for (y = tile->ypos; y < (tile->ypos + tile->height); y += mb_size) {
mb_offset = offs;
for (x = tile->xpos; x < xend; x += mb_size) {
mb->xpos = x;
mb->ypos = y;
mb->buf_offs = mb_offset;
mb->type = 1; /* set the macroblocks type = INTER */
mb->cbp = 0; /* all blocks are empty */
if (clear_first) {
mb->q_delta = band->glob_quant;
mb->mv_x = 0;
mb->mv_y = 0;
}
if (ref_mb) {
if (band->inherit_qdelta)
mb->q_delta = ref_mb->q_delta;
if (band->inherit_mv) {
/* motion vector inheritance */
if (mv_scale) {
mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
} else {
mb->mv_x = ref_mb->mv_x;
mb->mv_y = ref_mb->mv_y;
}
need_mc |= mb->mv_x || mb->mv_y; /* tracking non-zero motion vectors */
{
int dmv_x, dmv_y, cx, cy;
dmv_x = mb->mv_x >> is_halfpel;
dmv_y = mb->mv_y >> is_halfpel;
cx = mb->mv_x & is_halfpel;
cy = mb->mv_y & is_halfpel;
if ( mb->xpos + dmv_x < 0
|| mb->xpos + dmv_x + mb_size + cx > pitch
|| mb->ypos + dmv_y < 0
|| mb->ypos + dmv_y + mb_size + cy > band->aheight) {
av_log(avctx, AV_LOG_ERROR, "MV out of bounds\n");
return AVERROR_INVALIDDATA;
}
}
}
ref_mb++;
}
mb++;
mb_offset += mb_size;
} // for x
offs += row_offset;
} // for y
if (band->inherit_mv && need_mc) { /* apply motion compensation if there is at least one non-zero motion vector */
num_blocks = (mb_size != band->blk_size) ? 4 : 1; /* number of blocks per mb */
mc_no_delta_func = (band->blk_size == 8) ? ff_ivi_mc_8x8_no_delta
: ff_ivi_mc_4x4_no_delta;
for (mbn = 0, mb = tile->mbs; mbn < tile->num_MBs; mb++, mbn++) {
mv_x = mb->mv_x;
mv_y = mb->mv_y;
if (!band->is_halfpel) {
mc_type = 0; /* we have only fullpel vectors */
} else {
mc_type = ((mv_y & 1) << 1) | (mv_x & 1);
mv_x >>= 1;
mv_y >>= 1; /* convert halfpel vectors into fullpel ones */
}
for (blk = 0; blk < num_blocks; blk++) {
/* adjust block position in the buffer according with its number */
offs = mb->buf_offs + band->blk_size * ((blk & 1) + !!(blk & 2) * pitch);
ret = ivi_mc(band, mc_no_delta_func, 0, offs,
mv_x, mv_y, 0, 0, mc_type, -1);
if (ret < 0)
return ret;
}
}
} else {
/* copy data from the reference tile into the current one */
src = band->ref_buf + tile->ypos * pitch + tile->xpos;
dst = band->buf + tile->ypos * pitch + tile->xpos;
for (y = 0; y < tile->height; y++) {
memcpy(dst, src, tile->width*sizeof(band->buf[0]));
src += pitch;
dst += pitch;
}
}
return 0;
}
#ifdef DEBUG
static uint16_t ivi_calc_band_checksum(const IVIBandDesc *band)
{
int x, y;
int16_t *src, checksum;
src = band->buf;
checksum = 0;
for (y = 0; y < band->height; src += band->pitch, y++)
for (x = 0; x < band->width; x++)
checksum += src[x];
return checksum;
}
#endif
/*
* Convert and output the current plane.
* This conversion is done by adding back the bias value of 128
* (subtracted in the encoder) and clipping the result.
*
* @param[in] plane pointer to the descriptor of the plane being processed
* @param[out] dst pointer to the buffer receiving converted pixels
* @param[in] dst_pitch pitch for moving to the next y line
*/
static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, ptrdiff_t dst_pitch)
{
int x, y;
const int16_t *src = plane->bands[0].buf;
ptrdiff_t pitch = plane->bands[0].pitch;
if (!src)
return;
for (y = 0; y < plane->height; y++) {
int m = 0;
int w = plane->width;
for (x = 0; x < w; x++) {
int t = src[x] + 128;
dst[x] = t;
m |= t;
}
if (m & ~255)
for (x = 0; x < w; x++)
dst[x] = av_clip_uint8(src[x] + 128);
src += pitch;
dst += dst_pitch;
}
}
static void *prepare_buf(IVI45DecContext *ctx, IVIBandDesc *band, int i)
{
if (ctx->pic_conf.luma_bands <= 1 && i == 2)
return NULL;
if (!band->bufs[i])
band->bufs[i] = av_mallocz(2 * band->bufsize);
return band->bufs[i];
}
/**
* Decode an Indeo 4 or 5 band.
*
* @param[in,out] ctx ptr to the decoder context
* @param[in,out] band ptr to the band descriptor
* @param[in] avctx ptr to the AVCodecContext
* @return result code: 0 = OK, -1 = error
*/
static int decode_band(IVI45DecContext *ctx,
IVIBandDesc *band, AVCodecContext *avctx)
{
int result, i, t, idx1, idx2, pos;
IVITile *tile;
band->buf = prepare_buf(ctx, band, ctx->dst_buf);
if (!band->buf) {
av_log(avctx, AV_LOG_ERROR, "Band buffer points to no data!\n");
return AVERROR_INVALIDDATA;
}
if (ctx->is_indeo4 && ctx->frame_type == IVI4_FRAMETYPE_BIDIR) {
band->ref_buf = prepare_buf(ctx, band, ctx->b_ref_buf);
band->b_ref_buf = prepare_buf(ctx, band, ctx->ref_buf);
if (!band->b_ref_buf)
return AVERROR(ENOMEM);
} else {
band->ref_buf = prepare_buf(ctx, band, ctx->ref_buf);
band->b_ref_buf = 0;
}
if (!band->ref_buf)
return AVERROR(ENOMEM);
band->data_ptr = ctx->frame_data + (get_bits_count(&ctx->gb) >> 3);
result = ctx->decode_band_hdr(ctx, band, avctx);
if (result) {
av_log(avctx, AV_LOG_ERROR, "Error while decoding band header: %d\n",
result);
return result;
}
if (band->is_empty) {
av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
return AVERROR_INVALIDDATA;
}
band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
/* apply corrections to the selected rvmap table if present */
for (i = 0; i < band->num_corr; i++) {
idx1 = band->corr[i * 2];
idx2 = band->corr[i * 2 + 1];
FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
if (idx1 == band->rv_map->eob_sym || idx2 == band->rv_map->eob_sym)
band->rv_map->eob_sym ^= idx1 ^ idx2;
if (idx1 == band->rv_map->esc_sym || idx2 == band->rv_map->esc_sym)
band->rv_map->esc_sym ^= idx1 ^ idx2;