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ivi_common.c
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ivi_common.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.
*/
#define BITSTREAM_READER_LE
#include "libavutil/attributes.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
#include "ivi_common.h"
#include "ivi_dsp.h"
extern const IVIHuffDesc ff_ivi_mb_huff_desc[8]; ///< static macroblock huffman tables
extern const IVIHuffDesc ff_ivi_blk_huff_desc[8]; ///< static block huffman tables
static VLC ivi_mb_vlc_tabs [8]; ///< static macroblock Huffman tables
static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
/**
* 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 -1; /* 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);
}
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(&ff_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(&ff_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];
} else {
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) {
huff_tab->cust_desc.num_rows = 0; // reset faulty description
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]);
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);
}
}
av_cold int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
{
int p, b;
uint32_t b_width, b_height, align_fac, width_aligned, height_aligned, buf_size;
IVIBandDesc *band;
ivi_free_buffers(planes);
/* 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(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;
band->bufs[0] = av_mallocz(buf_size);
band->bufs[1] = av_mallocz(buf_size);
band->bufsize = buf_size/2;
if (!band->bufs[0] || !band->bufs[1])
return AVERROR(ENOMEM);
/* allocate the 3rd band buffer for scalability mode */
if (cfg->luma_bands > 1) {
band->bufs[2] = av_mallocz(buf_size);
if (!band->bufs[2])
return AVERROR(ENOMEM);
}
planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0; /* reset custom vlc */
}
}
return 0;
}
av_cold int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height)
{
int p, b, x, y, x_tiles, y_tiles, t_width, t_height;
IVIBandDesc *band;
IVITile *tile, *ref_tile;
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) {
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];
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(band->num_tiles * sizeof(IVITile));
if (!band->tiles)
return AVERROR(ENOMEM);
tile = band->tiles;
/* use the first luma band as reference for motion vectors
* and quant */
ref_tile = planes[0].bands[0].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_malloc(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) {
tile->ref_mbs = ref_tile->mbs;
}else
av_log(NULL, AV_LOG_DEBUG, "Cannot use ref_tile, too few mbs\n");
ref_tile++;
}
tile++;
}
}
}// for b
}// for p
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_long(gb, 24);
}
/* align the bitstream reader on the byte boundary */
align_get_bits(gb);
return len;
}
/*
* 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, IVIBandDesc *band, IVITile *tile,
AVCodecContext *avctx)
{
int mbn, blk, num_blocks, num_coeffs, blk_size, scan_pos, run, val,
pos, is_intra, mc_type = 0, mv_x, mv_y, col_mask;
uint8_t col_flags[8];
int32_t prev_dc, trvec[64];
uint32_t cbp, sym, lo, hi, quant, buf_offs, q;
IVIMbInfo *mb;
RVMapDesc *rvmap = band->rv_map;
void (*mc_with_delta_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type);
void (*mc_no_delta_func) (int16_t *buf, const int16_t *ref_buf, uint32_t pitch, int mc_type);
const uint16_t *base_tab;
const uint8_t *scale_tab;
prev_dc = 0; /* init intra prediction for the DC coefficient */
blk_size = band->blk_size;
col_mask = blk_size - 1; /* column mask for tracking non-zero coeffs */
num_blocks = (band->mb_size != blk_size) ? 4 : 1; /* number of blocks per mb */
num_coeffs = blk_size * blk_size;
if (blk_size == 8) {
mc_with_delta_func = ff_ivi_mc_8x8_delta;
mc_no_delta_func = ff_ivi_mc_8x8_no_delta;
} else {
mc_with_delta_func = ff_ivi_mc_4x4_delta;
mc_no_delta_func = ff_ivi_mc_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 = av_clip(band->glob_quant + mb->q_delta, 0, 23);
base_tab = is_intra ? band->intra_base : band->inter_base;
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;
if (band->is_halfpel) {
mc_type = ((mv_y & 1) << 1) | (mv_x & 1);
mv_x >>= 1;
mv_y >>= 1; /* convert halfpel vectors into fullpel ones */
}
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;
}
}
}
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 ? */
if (!band->scan) {
av_log(avctx, AV_LOG_ERROR, "Scan pattern is not set.\n");
return AVERROR_INVALIDDATA;
}
scan_pos = -1;
memset(trvec, 0, num_coeffs*sizeof(trvec[0])); /* zero transform vector */
memset(col_flags, 0, sizeof(col_flags)); /* zero column 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 */
if (sym == rvmap->esc_sym) { /* Escape - run/val explicitly coded using 3 vlc codes */
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);
val = IVI_TOSIGNED((hi << 6) | lo); /* merge them and convert into signed val */
} else {
if (sym >= 256U) {
av_log(avctx, AV_LOG_ERROR, "Invalid sym encountered: %d.\n", sym);
return -1;
}
run = rvmap->runtab[sym];
val = rvmap->valtab[sym];
}
/* de-zigzag and dequantize */
scan_pos += run;
if (scan_pos >= (unsigned)num_coeffs)
break;
pos = band->scan[scan_pos];
if (!val)
av_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;
col_flags[pos & col_mask] |= !!val; /* track columns containing non-zero coeffs */
}// while
if (scan_pos >= num_coeffs && sym != rvmap->eob_sym)
return -1; /* 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 + buf_offs,
band->pitch, col_flags);
/* apply motion compensation */
if (!is_intra)
mc_with_delta_func(band->buf + buf_offs,
band->ref_buf + buf_offs + mv_y * band->pitch + mv_x,
band->pitch, mc_type);
} else {
/* block not coded */
/* for intra blocks apply the dc slant transform */
/* for inter - perform the motion compensation without delta */
if (is_intra) {
band->dc_transform(&prev_dc, band->buf + buf_offs,
band->pitch, blk_size);
} else
mc_no_delta_func(band->buf + buf_offs,
band->ref_buf + buf_offs + mv_y * band->pitch + mv_x,
band->pitch, mc_type);
}
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, 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;
IVIMbInfo *mb, *ref_mb;
const int16_t *src;
int16_t *dst;
void (*mc_no_delta_func)(int16_t *buf, const int16_t *ref_buf, uint32_t pitch,
int mc_type);
if (tile->num_MBs != IVI_MBs_PER_TILE(tile->width, tile->height, band->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, band->mb_size));
return AVERROR_INVALIDDATA;
}
offs = tile->ypos * band->pitch + tile->xpos;
mb = tile->mbs;
ref_mb = tile->ref_mbs;
row_offset = band->mb_size * band->pitch;
need_mc = 0; /* reset the mc tracking flag */
for (y = tile->ypos; y < (tile->ypos + tile->height); y += band->mb_size) {
mb_offset = offs;
for (x = tile->xpos; x < (tile->xpos + tile->width); x += band->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 (!band->qdelta_present && !band->plane && !band->band_num) {
mb->q_delta = band->glob_quant;
mb->mv_x = 0;
mb->mv_y = 0;
}
if (band->inherit_qdelta && ref_mb)
mb->q_delta = ref_mb->q_delta;
if (band->inherit_mv && ref_mb) {
/* 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 >> 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) {
av_log(avctx, AV_LOG_ERROR, "MV out of bounds\n");
return AVERROR_INVALIDDATA;
}
}
}
mb++;
if (ref_mb)
ref_mb++;
mb_offset += band->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 = (band->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) * band->pitch);
mc_no_delta_func(band->buf + offs,
band->ref_buf + offs + mv_y * band->pitch + mv_x,
band->pitch, mc_type);
}
}
} else {
/* copy data from the reference tile into the current one */
src = band->ref_buf + tile->ypos * band->pitch + tile->xpos;
dst = band->buf + tile->ypos * band->pitch + tile->xpos;
for (y = 0; y < tile->height; y++) {
memcpy(dst, src, tile->width*sizeof(band->buf[0]));
src += band->pitch;
dst += band->pitch;
}
}
return 0;
}
#ifdef DEBUG
static uint16_t ivi_calc_band_checksum(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, int dst_pitch)
{
int x, y;
const int16_t *src = plane->bands[0].buf;
uint32_t pitch = plane->bands[0].pitch;
if (!src)
return;
for (y = 0; y < plane->height; y++) {
for (x = 0; x < plane->width; x++)
dst[x] = av_clip_uint8(src[x] + 128);
src += pitch;
dst += dst_pitch;
}
}
/**
* 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 = band->bufs[ctx->dst_buf];
if (!band->buf) {
av_log(avctx, AV_LOG_ERROR, "Band buffer points to no data!\n");
return AVERROR_INVALIDDATA;
}
band->ref_buf = band->bufs[ctx->ref_buf];
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;
}
pos = get_bits_count(&ctx->gb);
for (t = 0; t < band->num_tiles; t++) {
tile = &band->tiles[t];
if (tile->mb_size != band->mb_size) {
av_log(avctx, AV_LOG_ERROR, "MB sizes mismatch: %d vs. %d\n",
band->mb_size, tile->mb_size);
return AVERROR_INVALIDDATA;
}
tile->is_empty = get_bits1(&ctx->gb);
if (tile->is_empty) {
result = ivi_process_empty_tile(avctx, band, tile,
(ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
if (result < 0)
break;
av_dlog(avctx, "Empty tile encountered!\n");
} else {
tile->data_size = ivi_dec_tile_data_size(&ctx->gb);
if (!tile->data_size) {
av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
result = AVERROR_INVALIDDATA;
break;
}
result = ctx->decode_mb_info(ctx, band, tile, avctx);
if (result < 0)
break;
result = ivi_decode_blocks(&ctx->gb, band, tile, avctx);
if (result < 0 || ((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {
av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
break;
}
pos += tile->data_size << 3; // skip to next tile
}
}
/* restore the selected rvmap table by applying its corrections in reverse order */
for (i = band->num_corr-1; i >= 0; 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;
}
#ifdef DEBUG
if (band->checksum_present) {
uint16_t chksum = ivi_calc_band_checksum(band);
if (chksum != band->checksum) {
av_log(avctx, AV_LOG_ERROR,
"Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
band->plane, band->band_num, band->checksum, chksum);
}
}
#endif
align_get_bits(&ctx->gb);
return result;
}
int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
IVI45DecContext *ctx = avctx->priv_data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
int result, p, b;
init_get_bits(&ctx->gb, buf, buf_size * 8);
ctx->frame_data = buf;
ctx->frame_size = buf_size;
result = ctx->decode_pic_hdr(ctx, avctx);
if (result) {
av_log(avctx, AV_LOG_ERROR,
"Error while decoding picture header: %d\n", result);
return -1;
}
if (ctx->gop_invalid)
return AVERROR_INVALIDDATA;
if (ctx->gop_flags & IVI5_IS_PROTECTED) {
av_log(avctx, AV_LOG_ERROR, "Password-protected clip!\n");
return -1;
}
ctx->switch_buffers(ctx);
//{ START_TIMER;
if (ctx->is_nonnull_frame(ctx)) {
ctx->buf_invalid[ctx->dst_buf] = 1;
for (p = 0; p < 3; p++) {
for (b = 0; b < ctx->planes[p].num_bands; b++) {
result = decode_band(ctx, &ctx->planes[p].bands[b], avctx);
if (result) {
av_log(avctx, AV_LOG_ERROR,
"Error while decoding band: %d, plane: %d\n", b, p);
return -1;
}
}
}
ctx->buf_invalid[ctx->dst_buf] = 0;
}
if (ctx->buf_invalid[ctx->dst_buf])
return -1;
//STOP_TIMER("decode_planes"); }
/* If the bidirectional mode is enabled, next I and the following P frame will */
/* be sent together. Unfortunately the approach below seems to be the only way */
/* to handle the B-frames mode. That's exactly the same Intel decoders do. */
if (avctx->codec_id == AV_CODEC_ID_INDEO4 && ctx->frame_type == 0/*FRAMETYPE_INTRA*/) {
while (get_bits(&ctx->gb, 8)); // skip version string
skip_bits_long(&ctx->gb, 64); // skip padding, TODO: implement correct 8-bytes alignment
if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)
av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");
}
if (!ctx->is_nonnull_frame(ctx))
return buf_size;
if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);
ctx->frame.reference = 0;
avcodec_set_dimensions(avctx, ctx->planes[0].width, ctx->planes[0].height);
if ((result = ff_get_buffer(avctx, &ctx->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return result;
}
if (ctx->is_scalable) {
if (avctx->codec_id == AV_CODEC_ID_INDEO4)
ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
else
ff_ivi_recompose53 (&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
} else {
ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
}
ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
*got_frame = 1;
*(AVFrame*)data = ctx->frame;
return buf_size;
}
/**
* Close Indeo5 decoder and clean up its context.
*/
av_cold int ff_ivi_decode_close(AVCodecContext *avctx)
{
IVI45DecContext *ctx = avctx->priv_data;
ivi_free_buffers(&ctx->planes[0]);
if (ctx->mb_vlc.cust_tab.table)
ff_free_vlc(&ctx->mb_vlc.cust_tab);
if (ctx->frame.data[0])
avctx->release_buffer(avctx, &ctx->frame);
#if IVI4_STREAM_ANALYSER
if (avctx->codec_id == AV_CODEC_ID_INDEO4) {
if (ctx->is_scalable)
av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");
if (ctx->uses_tiling)
av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n");
if (ctx->has_b_frames)
av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");
if (ctx->has_transp)
av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");
if (ctx->uses_haar)
av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");
if (ctx->uses_fullpel)
av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");
}
#endif
return 0;
}
/**
* 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.
*/
const IVIHuffDesc ff_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}}
};
const IVIHuffDesc ff_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}}
};
/**
* Scan patterns shared between indeo4 and indeo5