diff options
Diffstat (limited to 'libavcodec/vorbisdec.c')
| -rw-r--r-- | libavcodec/vorbisdec.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c index deaaaa21c2..133f14bd1a 100644 --- a/libavcodec/vorbisdec.c +++ b/libavcodec/vorbisdec.c @@ -1,18 +1,22 @@ -/* - * 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 */ @@ -681,7 +685,7 @@ static int vorbis_parse_setup_hdr_residues(vorbis_context *vc) 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 > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 || + res_setup->end > (res_setup->type == 2 ? vc->audio_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", @@ -936,12 +940,12 @@ static int vorbis_parse_id_hdr(vorbis_context *vc) 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]; @@ -1165,7 +1169,7 @@ static int vorbis_floor1_decode(vorbis_context *vc, 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; @@ -1181,20 +1185,20 @@ static int vorbis_floor1_decode(vorbis_context *vc, 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)); |