64 lines
2.7 KiB
Diff
64 lines
2.7 KiB
Diff
From 2b475307dc11be9a1c3cc4358102c76a7f386a51 Mon Sep 17 00:00:00 2001
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From: Henrik Gramner <gramner@twoorioles.com>
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Date: Tue, 21 Nov 2023 20:47:50 +0100
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Subject: [PATCH] Fix tile_start_off calculations for extremely large frame
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sizes
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The tile start offset, in pixels, can exceed the range of a signed int.
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---
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src/decode.c | 13 +++++++------
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src/internal.h | 2 +-
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2 files changed, 8 insertions(+), 7 deletions(-)
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diff --git a/src/decode.c b/src/decode.c
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index fdf5a6b..eed9dfb 100644
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--- a/src/decode.c
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+++ b/src/decode.c
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@@ -2470,7 +2470,7 @@ static void setup_tile(Dav1dTileState *const ts,
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const Dav1dFrameContext *const f,
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const uint8_t *const data, const size_t sz,
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const int tile_row, const int tile_col,
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- const int tile_start_off)
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+ const unsigned tile_start_off)
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{
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const int col_sb_start = f->frame_hdr->tiling.col_start_sb[tile_col];
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const int col_sb128_start = col_sb_start >> !f->seq_hdr->sb128;
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@@ -2843,15 +2843,16 @@ int dav1d_decode_frame_init(Dav1dFrameContext *const f) {
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const uint8_t *const size_mul = ss_size_mul[f->cur.p.layout];
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const int hbd = !!f->seq_hdr->hbd;
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if (c->n_fc > 1) {
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+ const unsigned sb_step4 = f->sb_step * 4;
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int tile_idx = 0;
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for (int tile_row = 0; tile_row < f->frame_hdr->tiling.rows; tile_row++) {
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- int row_off = f->frame_hdr->tiling.row_start_sb[tile_row] *
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- f->sb_step * 4 * f->sb128w * 128;
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- int b_diff = (f->frame_hdr->tiling.row_start_sb[tile_row + 1] -
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- f->frame_hdr->tiling.row_start_sb[tile_row]) * f->sb_step * 4;
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+ const unsigned row_off = f->frame_hdr->tiling.row_start_sb[tile_row] *
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+ sb_step4 * f->sb128w * 128;
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+ const unsigned b_diff = (f->frame_hdr->tiling.row_start_sb[tile_row + 1] -
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+ f->frame_hdr->tiling.row_start_sb[tile_row]) * sb_step4;
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for (int tile_col = 0; tile_col < f->frame_hdr->tiling.cols; tile_col++) {
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f->frame_thread.tile_start_off[tile_idx++] = row_off + b_diff *
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- f->frame_hdr->tiling.col_start_sb[tile_col] * f->sb_step * 4;
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+ f->frame_hdr->tiling.col_start_sb[tile_col] * sb_step4;
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}
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}
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diff --git a/src/internal.h b/src/internal.h
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index 631c5a8..72f6560 100644
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--- a/src/internal.h
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+++ b/src/internal.h
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@@ -289,7 +289,7 @@ struct Dav1dFrameContext {
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int prog_sz;
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int cbi_sz, pal_sz, pal_idx_sz, cf_sz;
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// start offsets per tile
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- int *tile_start_off;
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+ unsigned *tile_start_off;
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} frame_thread;
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// loopfilter
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--
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2.43.0
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