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avcodec/vc1dec: Factor (re)initializing code out

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This is in preparation for removing the msmpeg4 dependency
from VC-1.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-10-30 16:12:15 +01:00
parent 5a157313b3
commit 835be33ee3
3 changed files with 21 additions and 11 deletions
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5
libavcodec/mss2.c
View File

@ -29,7 +29,6 @@
#include "error_resilience.h"
#include "mpeg_er.h"
#include "mpegvideodec.h"
#include "msmpeg4dec.h"
#include "qpeldsp.h"
#include "vc1.h"
#include "wmv2data.h"
@ -852,8 +851,8 @@ static av_cold int wmv9_init(AVCodecContext *avctx)
ff_vc1_init_transposed_scantables(v);
if ((ret = ff_msmpeg4_decode_init(avctx)) < 0 ||
(ret = ff_vc1_decode_init_alloc_tables(v)) < 0)
ret = ff_vc1_decode_init(avctx);
if (ret < 0)
return ret;
/* error concealment */

2
libavcodec/vc1.h
View File

@ -413,7 +413,7 @@ int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb);
int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb);
void ff_vc1_init_common(VC1Context *v);
int ff_vc1_decode_init_alloc_tables(VC1Context *v);
int ff_vc1_decode_init(AVCodecContext *avctx);
void ff_vc1_init_transposed_scantables(VC1Context *v);
int ff_vc1_decode_end(AVCodecContext *avctx);
void ff_vc1_decode_blocks(VC1Context *v);

25
libavcodec/vc1dec.c
View File

@ -329,7 +329,7 @@ static void vc1_sprite_flush(AVCodecContext *avctx)
#endif
av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)
static av_cold int vc1_decode_init_alloc_tables(VC1Context *v)
{
MpegEncContext *s = &v->s;
int i, ret = AVERROR(ENOMEM);
@ -404,10 +404,24 @@ av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)
return 0;
error:
ff_vc1_decode_end(s->avctx);
return ret;
}
av_cold int ff_vc1_decode_init(AVCodecContext *avctx)
{
int ret = ff_msmpeg4_decode_init(avctx);
VC1Context *const v = avctx->priv_data;
if (ret < 0)
return ret;
ret = vc1_decode_init_alloc_tables(v);
if (ret < 0) {
ff_vc1_decode_end(avctx);
return ret;
}
return 0;
}
av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
{
int i;
@ -947,12 +961,9 @@ static int vc1_decode_frame(AVCodecContext *avctx, AVFrame *pict,
}
if (!s->context_initialized) {
if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
ret = ff_vc1_decode_init(avctx);
if (ret < 0)
goto err;
if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
ff_mpv_common_end(s);
goto err;
}
s->low_delay = !avctx->has_b_frames || v->res_sprite;