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Code Issues Releases Activity

vp9: re-allocate block buffers on uses_2pass change w/o size change.

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Fixes valgrind errors and crashes in fuzzed9.ivf.
This commit is contained in:
Ronald S. Bultje 2014-02-08 08:24:13 -05:00 committed by Clément Bœsch
parent bd35d58463
commit af63ea7078
1 changed files with 22 additions and 1 deletions
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23
libavcodec/vp9.c
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@ -230,6 +230,7 @@ typedef struct VP9Context {
DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[71*80];
// block reconstruction intermediates
int block_alloc_using_2pass;
int16_t *block_base, *block, *uvblock_base[2], *uvblock[2];
uint8_t *eob_base, *uveob_base[2], *eob, *uveob[2];
struct { int x, y; } min_mv, max_mv;
@ -336,9 +337,23 @@ static int update_size(AVCodecContext *ctx, int w, int h)
assign(s->above_mv_ctx, VP56mv(*)[2], 16);
#undef assign
// these will be re-allocated a little later
av_freep(&s->b_base);
av_freep(&s->block_base);
return 0;
}
static int update_block_buffers(AVCodecContext *ctx)
{
VP9Context *s = ctx->priv_data;
if (s->b_base && s->block_base && s->block_alloc_using_2pass == s->uses_2pass)
return 0;
av_free(s->b_base);
av_free(s->block_base);
if (ctx->active_thread_type == FF_THREAD_FRAME && s->refreshctx && !s->parallelmode) {
if (s->uses_2pass) {
int sbs = s->sb_cols * s->sb_rows;
s->b_base = av_malloc(sizeof(VP9Block) * s->cols * s->rows);
@ -361,6 +376,7 @@ static int update_size(AVCodecContext *ctx, int w, int h)
s->uveob_base[0] = s->eob_base + 256;
s->uveob_base[1] = s->uveob_base[0] + 64;
}
s->block_alloc_using_2pass = s->uses_2pass;
return 0;
}
@ -3563,6 +3579,11 @@ static int vp9_decode_frame(AVCodecContext *ctx, void *frame,
memset(s->above_segpred_ctx, 0, s->cols);
s->pass = s->uses_2pass =
ctx->active_thread_type == FF_THREAD_FRAME && s->refreshctx && !s->parallelmode;
if ((res = update_block_buffers(ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR,
"Failed to allocate block buffers\n");
return res;
}
if (s->refreshctx && s->parallelmode) {
int j, k, l, m;