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Merge commit 'a0b8f85f29883f538a32593bc3c6f712c972ff70' into release/0.10

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* commit 'a0b8f85f29883f538a32593bc3c6f712c972ff70':
  indeo: Bound-check before applying motion compensation
  indeo: Bound-check before applying transform
  indeo: reject negative array indexes
  indeo: Cosmetic formatting

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-04 16:40:55 +01:00
commit cb297f6ae7
4 changed files with 116 additions and 45 deletions
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7
libavcodec/indeo4.c
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@ -348,6 +348,13 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
band->inv_transform = transforms[transform_id].inv_trans;
band->dc_transform = transforms[transform_id].dc_trans;
band->is_2d_trans = transforms[transform_id].is_2d_trans;
if (transform_id < 10)
band->transform_size = 8;
else
band->transform_size = 4;
if (band->blk_size != band->transform_size)
return AVERROR_INVALIDDATA;
scan_indx = get_bits(&ctx->gb, 4);
if (scan_indx == 15) {

38
libavcodec/indeo5.c
View File

@ -148,39 +148,47 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
/* select transform function and scan pattern according to plane and band number */
switch ((p << 2) + i) {
case 0:
band->inv_transform = ff_ivi_inverse_slant_8x8;
band->dc_transform = ff_ivi_dc_slant_2d;
band->scan = ff_zigzag_direct;
band->inv_transform = ff_ivi_inverse_slant_8x8;
band->dc_transform = ff_ivi_dc_slant_2d;
band->scan = ff_zigzag_direct;
band->transform_size = 8;
break;
case 1:
band->inv_transform = ff_ivi_row_slant8;
band->dc_transform = ff_ivi_dc_row_slant;
band->scan = ff_ivi_vertical_scan_8x8;
band->inv_transform = ff_ivi_row_slant8;
band->dc_transform = ff_ivi_dc_row_slant;
band->scan = ff_ivi_vertical_scan_8x8;
band->transform_size = 8;
break;
case 2:
band->inv_transform = ff_ivi_col_slant8;
band->dc_transform = ff_ivi_dc_col_slant;
band->scan = ff_ivi_horizontal_scan_8x8;
band->inv_transform = ff_ivi_col_slant8;
band->dc_transform = ff_ivi_dc_col_slant;
band->scan = ff_ivi_horizontal_scan_8x8;
band->transform_size = 8;
break;
case 3:
band->inv_transform = ff_ivi_put_pixels_8x8;
band->dc_transform = ff_ivi_put_dc_pixel_8x8;
band->scan = ff_ivi_horizontal_scan_8x8;
band->inv_transform = ff_ivi_put_pixels_8x8;
band->dc_transform = ff_ivi_put_dc_pixel_8x8;
band->scan = ff_ivi_horizontal_scan_8x8;
band->transform_size = 8;
break;
case 4:
band->inv_transform = ff_ivi_inverse_slant_4x4;
band->dc_transform = ff_ivi_dc_slant_2d;
band->scan = ff_ivi_direct_scan_4x4;
band->inv_transform = ff_ivi_inverse_slant_4x4;
band->dc_transform = ff_ivi_dc_slant_2d;
band->scan = ff_ivi_direct_scan_4x4;
band->transform_size = 4;
break;
}
band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 ||
band->inv_transform == ff_ivi_inverse_slant_4x4;
if (band->transform_size != band->blk_size)
return AVERROR_INVALIDDATA;
/* select dequant matrix according to plane and band number */
if (!p) {
quant_mat = (pic_conf.luma_bands > 1) ? i+1 : 0;

115
libavcodec/ivi_common.c
View File

@ -42,6 +42,26 @@ VLC ff_ivi_blk_vlc_tabs[8];
typedef void (*ivi_mc_func) (int16_t *buf, const int16_t *ref_buf,
uint32_t pitch, int mc_type);
static int ivi_mc(IVIBandDesc *band, ivi_mc_func mc,
int offs, int mv_x, int mv_y, int mc_type)
{
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 (offs < 0 || ref_offs < 0 || !band->ref_buf)
return AVERROR_INVALIDDATA;
if (buf_size - min_size < offs)
return AVERROR_INVALIDDATA;
if (buf_size - min_size - ref_size < ref_offs)
return AVERROR_INVALIDDATA;
mc(band->buf + offs, band->ref_buf + ref_offs, band->pitch, mc_type);
return 0;
}
/**
* Reverse "nbits" bits of the value "val" and return the result
* in the least significant bits.
@ -51,9 +71,10 @@ static uint16_t inv_bits(uint16_t val, int nbits)
uint16_t res;
if (nbits <= 8) {
res = av_reverse[val] >> (8-nbits);
res = av_reverse[val] >> (8 - nbits);
} else
res = ((av_reverse[val & 0xFF] << 8) + (av_reverse[val >> 8])) >> (16-nbits);
res = ((av_reverse[val & 0xFF] << 8) +
(av_reverse[val >> 8])) >> (16 - nbits);
return res;
}
@ -103,10 +124,12 @@ void ff_ivi_init_static_vlc(void)
for (i = 0; i < 8; i++) {
ff_ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192;
ff_ivi_mb_vlc_tabs[i].table_allocated = 8192;
ff_ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i], &ff_ivi_mb_vlc_tabs[i], 1);
ff_ivi_create_huff_from_desc(&ff_ivi_mb_huff_desc[i],
&ff_ivi_mb_vlc_tabs[i], 1);
ff_ivi_blk_vlc_tabs[i].table = table_data + (i * 2 + 1) * 8192;
ff_ivi_blk_vlc_tabs[i].table_allocated = 8192;
ff_ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i], &ff_ivi_blk_vlc_tabs[i], 1);
ff_ivi_create_huff_from_desc(&ff_ivi_blk_huff_desc[i],
&ff_ivi_blk_vlc_tabs[i], 1);
}
initialized_vlcs = 1;
}
@ -114,7 +137,7 @@ void ff_ivi_init_static_vlc(void)
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx)
{
int i, result;
int i, result;
IVIHuffDesc new_huff;
if (!desc_coded) {
@ -175,8 +198,9 @@ void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src)
int av_cold 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;
int p, b;
uint32_t b_width, b_height, align_fac, width_aligned,
height_aligned, buf_size;
IVIBandDesc *band;
ff_ivi_free_buffers(planes);
@ -199,8 +223,10 @@ int av_cold ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
/* 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;
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) */
@ -228,8 +254,8 @@ int av_cold ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg)
if (!band->bufs[2])
return AVERROR(ENOMEM);
}
planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0; /* reset custom vlc */
/* reset custom vlc */
planes[p].bands[0].blk_vlc.cust_desc.num_rows = 0;
}
}
@ -347,6 +373,25 @@ int ff_ivi_dec_tile_data_size(GetBitContext *gb)
return len;
}
static int ivi_dc_transform(IVIBandDesc *band, int *prev_dc, int buf_offs,
int blk_size)
{
int buf_size = band->pitch * band->aheight - buf_offs;
int min_size = (blk_size - 1) * band->pitch + blk_size;
if (!band->dc_transform)
return 0;
if (min_size > buf_size)
return AVERROR_INVALIDDATA;
band->dc_transform(prev_dc, band->buf + buf_offs,
band->pitch, blk_size);
return 0;
}
static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
ivi_mc_func mc, int mv_x, int mv_y,
int *prev_dc, int is_intra, int mc_type,
@ -362,6 +407,12 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
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)
return AVERROR_INVALIDDATA;
@ -393,7 +444,7 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
/* de-zigzag and dequantize */
scan_pos += run;
if (scan_pos >= num_coeffs)
if (scan_pos >= num_coeffs || scan_pos < 0)
break;
pos = band->scan[scan_pos];
@ -405,7 +456,7 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
col_flags[pos & col_mask] |= !!val;
}
if (scan_pos >= num_coeffs && sym != rvmap->eob_sym)
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 */
@ -421,9 +472,7 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
/* apply motion compensation */
if (!is_intra)
mc(band->buf + offs,
band->ref_buf + offs + mv_y * band->pitch + mv_x,
band->pitch, mc_type);
return ivi_mc(band, mc, offs, mv_x, mv_y, mc_type);
return 0;
}
@ -509,13 +558,15 @@ int ff_ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile)
/* for intra blocks apply the dc slant transform */
/* for inter - perform the motion compensation without delta */
if (is_intra) {
if (band->dc_transform)
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);
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, buf_offs,
mv_x, mv_y, mc_type);
if (ret < 0)
return ret;
}
}
cbp >>= 1;
@ -540,7 +591,7 @@ 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;
int offs, mb_offset, row_offset, ret;
IVIMbInfo *mb, *ref_mb;
const int16_t *src;
int16_t *dst;
@ -618,9 +669,10 @@ static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
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);
ret = ivi_mc(band, mc_no_delta_func, offs,
mv_x, mv_y, mc_type);
if (ret < 0)
return ret;
}
}
} else {
@ -783,7 +835,8 @@ static int decode_band(IVI45DecContext *ctx, int plane_num,
}
}
/* restore the selected rvmap table by applying its corrections in reverse order */
/* 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];
@ -796,7 +849,8 @@ static int decode_band(IVI45DecContext *ctx, int plane_num,
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 checksum mismatch! Plane %d, band %d, "
"received: %x, calculated: %x\n",
band->plane, band->band_num, band->checksum, chksum);
}
}
@ -863,7 +917,8 @@ int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
/* 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 == CODEC_ID_INDEO4 && ctx->frame_type == 0/*FRAMETYPE_INTRA*/) {
if (avctx->codec_id == 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)

1
libavcodec/ivi_common.h
View File

@ -162,6 +162,7 @@ typedef struct {
int num_tiles; ///< number of tiles in this band
IVITile *tiles; ///< array of tile descriptors
InvTransformPtr *inv_transform;
int transform_size;
DCTransformPtr *dc_transform;
int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used
int32_t checksum; ///< for debug purposes