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Code Issues Releases Activity

avcodec/mpeg12dec: Remove redundant mpeg_enc_ctx_allocated

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Use context_initialized from the underlying MpegEncContext
instead. Also don't check before ff_mpv_common_end()
in mpeg_decode_end().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-04-05 11:29:04 +02:00
parent 94295bb574
commit 7f0efe2324
1 changed files with 12 additions and 24 deletions
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36
libavcodec/mpeg12dec.c
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@ -71,7 +71,6 @@ enum Mpeg2ClosedCaptionsFormat {
typedef struct Mpeg1Context {
MpegEncContext mpeg_enc_ctx;
int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
int repeat_field; /* true if we must repeat the field */
AVPanScan pan_scan; /* some temporary storage for the panscan */
AVStereo3D stereo3d;
@ -803,7 +802,6 @@ static av_cold int mpeg_decode_init(AVCodecContext *avctx)
ff_mpeg12_init_vlcs();
s2->chroma_format = 1;
s->mpeg_enc_ctx_allocated = 0;
s->repeat_field = 0;
avctx->color_range = AVCOL_RANGE_MPEG;
return 0;
@ -817,16 +815,14 @@ static int mpeg_decode_update_thread_context(AVCodecContext *avctx,
MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx;
int err;
if (avctx == avctx_from ||
!ctx_from->mpeg_enc_ctx_allocated ||
!s1->context_initialized)
if (avctx == avctx_from || !s1->context_initialized)
return 0;
err = ff_mpeg_update_thread_context(avctx, avctx_from);
if (err)
return err;
if (!ctx->mpeg_enc_ctx_allocated)
if (!s->context_initialized)
memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext));
return 0;
@ -961,7 +957,7 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
}
if ((s1->mpeg_enc_ctx_allocated == 0) ||
if (!s->context_initialized ||
avctx->coded_width != s->width ||
avctx->coded_height != s->height ||
s1->save_width != s->width ||
@ -969,10 +965,8 @@ static int mpeg_decode_postinit(AVCodecContext *avctx)
av_cmp_q(s1->save_aspect, s->avctx->sample_aspect_ratio) ||
(s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
0) {
if (s1->mpeg_enc_ctx_allocated) {
if (s->context_initialized)
ff_mpv_common_end(s);
s1->mpeg_enc_ctx_allocated = 0;
}
ret = ff_set_dimensions(avctx, s->width, s->height);
if (ret < 0)
@ -1029,8 +1023,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
s1->mpeg_enc_ctx_allocated = 1;
}
return 0;
}
@ -1233,7 +1225,7 @@ static int mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
if (!s->pict_type && s1->mpeg_enc_ctx_allocated) {
if (!s->pict_type && s->context_initialized) {
av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code\n");
if (s->avctx->err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
@ -1740,7 +1732,7 @@ static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
if (!s->context_initialized || !s->current_picture_ptr)
return 0;
if (s->avctx->hwaccel) {
@ -1881,10 +1873,9 @@ static int vcr2_init_sequence(AVCodecContext *avctx)
/* start new MPEG-1 context decoding */
s->out_format = FMT_MPEG1;
if (s1->mpeg_enc_ctx_allocated) {
if (s->context_initialized)
ff_mpv_common_end(s);
s1->mpeg_enc_ctx_allocated = 0;
}
s->width = avctx->coded_width;
s->height = avctx->coded_height;
avctx->has_b_frames = 0; // true?
@ -1894,7 +1885,6 @@ static int vcr2_init_sequence(AVCodecContext *avctx)
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
s1->mpeg_enc_ctx_allocated = 1;
for (i = 0; i < 64; i++) {
int j = s->idsp.idct_permutation[i];
@ -2448,7 +2438,7 @@ static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
break;
}
if (!s->mpeg_enc_ctx_allocated)
if (!s2->context_initialized)
break;
if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
@ -2546,9 +2536,8 @@ static int mpeg_decode_frame(AVCodecContext *avctx, AVFrame *picture,
return buf_size;
}
if (s->mpeg_enc_ctx_allocated == 0 && ( s2->codec_tag == AV_RL32("VCR2")
|| s2->codec_tag == AV_RL32("BW10")
))
if (!s2->context_initialized &&
(s2->codec_tag == AV_RL32("VCR2") || s2->codec_tag == AV_RL32("BW10")))
vcr2_init_sequence(avctx);
s->slice_count = 0;
@ -2606,8 +2595,7 @@ static av_cold int mpeg_decode_end(AVCodecContext *avctx)
{
Mpeg1Context *s = avctx->priv_data;
if (s->mpeg_enc_ctx_allocated)
ff_mpv_common_end(&s->mpeg_enc_ctx);
ff_mpv_common_end(&s->mpeg_enc_ctx);
av_buffer_unref(&s->a53_buf_ref);
return 0;
}