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Fix VC-1 width/height handling. 

avcodec_set_dimensions should be used for size changes to ensure
compatibility with future changes.
avctx->width/avctx->height may not be set to display-only dimensions.
Even more so since vc1dec.c would later set coded_width/height based
on this.
coded_width/coded_height should be used instead of width/height for
decoder setup.
This fixes playback of e.g. zz-mcr-nsqr.vc1 sample (containing
display width/height settings) in MPlayer and should fix a crash
with MPC: http://forum.doom9.org/showthread.php?t=162221.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2011-08-13 11:32:10 +02:00
parent 86ca51acb0
commit 4f00519d95
2 changed files with 21 additions and 20 deletions
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31
libavcodec/vc1.c
View File

@ -388,8 +388,9 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
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
@ -426,6 +427,7 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
{
int w, h;
v->res_rtm_flag = 1;
v->level = get_bits(gb, 3);
if(v->level >= 5)
@ -446,18 +448,17 @@ 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;
w = (get_bits(gb, 12) + 1) << 1;
h = (get_bits(gb, 12) + 1) << 1;
avcodec_set_dimensions(v->s.avctx, w, h);
v->broadcast = get_bits1(gb);
v->interlace = get_bits1(gb);
v->tfcntrflag = get_bits1(gb);
v->finterpflag = get_bits1(gb);
skip_bits1(gb); // reserved
v->s.h_edge_pos = v->s.avctx->coded_width;
v->s.v_edge_pos = v->s.avctx->coded_height;
v->s.h_edge_pos = w;
v->s.v_edge_pos = h;
av_log(v->s.avctx, AV_LOG_DEBUG,
"Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
@ -475,11 +476,12 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
}
v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
if(get_bits1(gb)) { //Display Info - decoding is not affected by it
int w, h, ar = 0;
int dw, dh, ar = 0;
av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
v->s.avctx->width = w = get_bits(gb, 14) + 1;
v->s.avctx->height = h = get_bits(gb, 14) + 1;
av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
dw = get_bits(gb, 14) + 1;
dh = get_bits(gb, 14) + 1;
v->s.avctx->sample_aspect_ratio = av_div_q((AVRational){dw, dh}, (AVRational){w, h});
av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", dw, dh);
if(get_bits1(gb))
ar = get_bits(gb, 4);
if(ar && ar < 14){
@ -551,8 +553,9 @@ int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *
}
if(get_bits1(gb)){
avctx->coded_width = (get_bits(gb, 12)+1)<<1;
avctx->coded_height = (get_bits(gb, 12)+1)<<1;
int w = (get_bits(gb, 12)+1)<<1;
int h = (get_bits(gb, 12)+1)<<1;
avcodec_set_dimensions(avctx, w, h);
}
if(v->extended_mv)
v->extended_dmv = get_bits1(gb);

10
libavcodec/vc1dec.c
View File

@ -3418,8 +3418,8 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
if (vc1_init_common(v) < 0) return -1;
ff_vc1dsp_init(&v->vc1dsp);
cur_width = avctx->coded_width = avctx->width;
cur_height = avctx->coded_height = avctx->height;
cur_width = avctx->coded_width;
cur_height = avctx->coded_height;
if (avctx->codec_id == CODEC_ID_WMV3)
{
int count = 0;
@ -3494,13 +3494,11 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
// yet when ff_msmpeg4_decode_init was called the fist time
// above. If sequence information changes, we need to call
// it again.
if (cur_width != avctx->width ||
cur_height != avctx->height) {
if (cur_width != avctx->coded_width ||
cur_height != avctx->coded_height) {
MPV_common_end(s);
if(ff_msmpeg4_decode_init(avctx) < 0)
return -1;
avctx->coded_width = avctx->width;
avctx->coded_height = avctx->height;
}
avctx->profile = v->profile;