-/*
- * This file is part of Libav.
+/**
+ * @file
+ * Vorbis I decoder
+ * @author Denes Balatoni ( dbalatoni programozo hu )
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
res_setup->partition_size = get_bits(gb, 24) + 1;
/* Validations to prevent a buffer overflow later. */
if (res_setup->begin>res_setup->end ||
- res_setup->end > vc->avccontext->channels * vc->blocksize[1] / 2 ||
+ res_setup->end > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 ||
(res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
av_log(vc->avccontext, AV_LOG_ERROR,
"partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
for (idx = 0; idx < n; ++idx) {
map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
- ((vf->bark_map_size) /
- BARK(vf->rate / 2.0f)));
+ (vf->bark_map_size / BARK(vf->rate / 2.0f)));
if (vf->bark_map_size-1 < map[idx])
map[idx] = vf->bark_map_size - 1;
}
vc->bitrate_minimum = get_bits_long(gb, 32);
bl0 = get_bits(gb, 4);
bl1 = get_bits(gb, 4);
- vc->blocksize[0] = (1 << bl0);
- vc->blocksize[1] = (1 << bl1);
if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
return AVERROR_INVALIDDATA;
}
+ vc->blocksize[0] = (1 << bl0);
+ vc->blocksize[1] = (1 << bl1);
vc->win[0] = ff_vorbis_vwin[bl0 - 6];
vc->win[1] = ff_vorbis_vwin[bl1 - 6];
int headers_len = avccontext->extradata_size;
uint8_t *header_start[3];
int header_len[3];
- GetBitContext *gb = &(vc->gb);
+ GetBitContext *gb = &vc->gb;
int hdr_type, ret;
vc->avccontext = avccontext;
uint16_t floor1_Y[258];
uint16_t floor1_Y_final[258];
int floor1_flag[258];
- unsigned class, cdim, cbits, csub, cval, offset, i, j;
+ unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
int book, adx, ady, dy, off, predicted, err;
offset = 2;
for (i = 0; i < vf->partitions; ++i) {
- class = vf->partition_class[i];
- cdim = vf->class_dimensions[class];
- cbits = vf->class_subclasses[class];
+ partition_class = vf->partition_class[i];
+ cdim = vf->class_dimensions[partition_class];
+ cbits = vf->class_subclasses[partition_class];
csub = (1 << cbits) - 1;
cval = 0;
av_dlog(NULL, "Cbits %u\n", cbits);
if (cbits) // this reads all subclasses for this partition's class
- cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
- vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
+ cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
+ vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
for (j = 0; j < cdim; ++j) {
- book = vf->subclass_books[class][cval & csub];
+ book = vf->subclass_books[partition_class][cval & csub];
av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
book, cbits, cval, get_bits_count(gb));
uint8_t *do_not_decode,
float *vec,
unsigned vlen,
+ unsigned ch_left,
int vr_type)
{
GetBitContext *gb = &vc->gb;
unsigned ptns_to_read = vr->ptns_to_read;
uint8_t *classifs = vr->classifs;
unsigned pass, ch_used, i, j, k, l;
+ unsigned max_output = (ch - 1) * vlen;
if (vr_type == 2) {
for (j = 1; j < ch; ++j)
if (do_not_decode[0])
return 0;
ch_used = 1;
+ max_output += vr->end / ch;
} else {
ch_used = ch;
+ max_output += vr->end;
+ }
+
+ if (max_output > ch_left * vlen) {
+ av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
+ return -1;
}
av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
unsigned ch,
uint8_t *do_not_decode,
- float *vec, unsigned vlen)
+ float *vec, unsigned vlen,
+ unsigned ch_left)
{
if (vr->type == 2)
- return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
+ return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
else if (vr->type == 1)
- return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
+ return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
else if (vr->type == 0)
- return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
+ return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
else {
av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
return AVERROR_INVALIDDATA;
uint8_t res_chan[255];
unsigned res_num = 0;
int retlen = 0;
+ unsigned ch_left = vc->audio_channels;
+ unsigned vlen;
if (get_bits1(gb)) {
av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
blockflag = vc->modes[mode_number].blockflag;
blocksize = vc->blocksize[blockflag];
+ vlen = blocksize / 2;
if (blockflag)
skip_bits(gb, 2); // previous_window, next_window
- memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
- memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
+ memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
+ memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
// Decode floor
return AVERROR_INVALIDDATA;
}
no_residue[i] = ret;
- ch_floor_ptr += blocksize / 2;
+ ch_floor_ptr += vlen;
}
// Nonzero vector propagate
for (i = 0; i < mapping->submaps; ++i) {
vorbis_residue *residue;
unsigned ch = 0;
+ int ret;
for (j = 0; j < vc->audio_channels; ++j) {
if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
}
}
residue = &vc->residues[mapping->submap_residue[i]];
- vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
+ if (ch_left < ch) {
+ av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
+ return -1;
+ }
+ if (ch) {
+ ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
+ if (ret < 0)
+ return ret;
+ }
- ch_res_ptr += ch * blocksize / 2;
+ ch_res_ptr += ch * vlen;
+ ch_left -= ch;
}
// Inverse coupling
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
vorbis_context *vc = avccontext->priv_data;
- GetBitContext *gb = &(vc->gb);
+ GetBitContext *gb = &vc->gb;
const float *channel_ptrs[255];
int i, len, ret;
projects / ffmpeg / blobdiff