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Diffstat (limited to 'libavcodec/vc1.c')
-rw-r--r--libavcodec/vc1.c82
1 files changed, 65 insertions, 17 deletions
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 0e218af759..955dfa71dc 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -4,20 +4,20 @@
* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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
*/
@@ -293,7 +293,7 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
*/
int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
{
- av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
+ av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits_long(gb, 32));
v->profile = get_bits(gb, 2);
if (v->profile == PROFILE_COMPLEX) {
av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
@@ -380,8 +380,9 @@ int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitCo
v->finterpflag = get_bits1(gb); //common
if (v->res_sprite) {
- v->s.avctx->width = v->s.avctx->coded_width = get_bits(gb, 11);
- v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11);
+ int w = get_bits(gb, 11);
+ int h = get_bits(gb, 11);
+ avcodec_set_dimensions(v->s.avctx, w, h);
skip_bits(gb, 5); //frame rate
v->res_x8 = get_bits1(gb);
if (get_bits1(gb)) { // something to do with DC VLC selection
@@ -435,10 +436,8 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
v->bitrtq_postproc = get_bits(gb, 5); //common
v->postprocflag = get_bits1(gb); //common
- v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
- v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
- v->s.avctx->width = v->s.avctx->coded_width;
- v->s.avctx->height = v->s.avctx->coded_height;
+ v->max_coded_width = (get_bits(gb, 12) + 1) << 1;
+ v->max_coded_height = (get_bits(gb, 12) + 1) << 1;
v->broadcast = get_bits1(gb);
v->interlace = get_bits1(gb);
v->tfcntrflag = get_bits1(gb);
@@ -527,6 +526,7 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
{
int i;
+ int w,h;
av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
v->broken_link = get_bits1(gb);
@@ -534,6 +534,8 @@ int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContex
v->panscanflag = get_bits1(gb);
v->refdist_flag = get_bits1(gb);
v->s.loop_filter = get_bits1(gb);
+ if (v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
+ v->s.loop_filter = 0;
v->fastuvmc = get_bits1(gb);
v->extended_mv = get_bits1(gb);
v->dquant = get_bits(gb, 2);
@@ -547,10 +549,14 @@ int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContex
}
}
- if (get_bits1(gb)) {
- avctx->width = avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
- avctx->height = avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
+ if(get_bits1(gb)){
+ w = (get_bits(gb, 12)+1)<<1;
+ h = (get_bits(gb, 12)+1)<<1;
+ } else {
+ w = v->max_coded_width;
+ h = v->max_coded_height;
}
+ avcodec_set_dimensions(avctx, w, h);
if (v->extended_mv)
v->extended_dmv = get_bits1(gb);
if ((v->range_mapy_flag = get_bits1(gb))) {
@@ -822,8 +828,11 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
int mbmodetab, imvtab, icbptab, twomvbptab, fourmvbptab; /* useful only for debugging */
int scale, shift, i; /* for initializing LUT for intensity compensation */
+ v->numref=0;
v->p_frame_skipped = 0;
if (v->second_field) {
+ if(v->fcm!=2 || v->field_mode!=1)
+ return -1;
v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
if (v->fptype & 4)
v->s.pict_type = (v->fptype & 1) ? AV_PICTURE_TYPE_BI : AV_PICTURE_TYPE_B;
@@ -891,6 +900,8 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
v->rnd = get_bits1(gb);
if (v->interlace)
v->uvsamp = get_bits1(gb);
+ if(!ff_vc1_bfraction_vlc.table)
+ return 0; //parsing only, vlc tables havnt been allocated
if (v->field_mode) {
if (!v->refdist_flag)
v->refdist = 0;
@@ -1134,9 +1145,14 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
}
break;
case AV_PICTURE_TYPE_B:
- // TODO: implement interlaced frame B picture decoding
- if (v->fcm == ILACE_FRAME)
- return -1;
+ if (v->fcm == ILACE_FRAME) {
+ v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
+ v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
+ if (v->bfraction == 0) {
+ return -1;
+ }
+ return -1; // This codepath is still incomplete thus it is disabled
+ }
if (v->extended_mv)
v->mvrange = get_unary(gb, 0, 3);
else
@@ -1155,6 +1171,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
if (v->field_mode) {
int mvmode;
+ av_log(v->s.avctx, AV_LOG_DEBUG, "B Fields\n");
if (v->extended_dmv)
v->dmvrange = get_unary(gb, 0, 3);
mvmode = get_unary(gb, 1, 3);
@@ -1182,6 +1199,37 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
}
v->numref = 1; // interlaced field B pictures are always 2-ref
+ } else if (v->fcm == ILACE_FRAME) {
+ if (v->extended_dmv)
+ v->dmvrange = get_unary(gb, 0, 3);
+ get_bits1(gb); /* intcomp - present but shall always be 0 */
+ v->intcomp = 0;
+ v->mv_mode = MV_PMODE_1MV;
+ v->fourmvswitch = 0;
+ v->qs_last = v->s.quarter_sample;
+ v->s.quarter_sample = 1;
+ v->s.mspel = 1;
+ status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
+ if (status < 0)
+ return -1;
+ av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+ status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
+ if (status < 0)
+ return -1;
+ av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
+ "Imode: %i, Invert: %i\n", status>>1, status&1);
+ mbmodetab = get_bits(gb, 2);
+ v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[mbmodetab];
+ imvtab = get_bits(gb, 2);
+ v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[imvtab];
+ // interlaced p/b-picture cbpcy range is [1, 63]
+ icbptab = get_bits(gb, 3);
+ v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[icbptab];
+ twomvbptab = get_bits(gb, 2);
+ v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[twomvbptab];
+ fourmvbptab = get_bits(gb, 2);
+ v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[fourmvbptab];
} else {
v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
v->qs_last = v->s.quarter_sample;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 13:24:03 +0000