From 46d12e9ae6fa9c233bc32812b13185ee7df8d3fd Mon Sep 17 00:00:00 2001 From: Paul Adenot Date: Thu, 10 Nov 2016 06:20:16 +0100 Subject: [PATCH] Prevent underflowing the number of input frames needed in input when resampling. (#188) --- src/cubeb_resampler_internal.h | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/src/cubeb_resampler_internal.h b/src/cubeb_resampler_internal.h index e165cc2..3c37a04 100644 --- a/src/cubeb_resampler_internal.h +++ b/src/cubeb_resampler_internal.h @@ -263,9 +263,15 @@ public: * number of output frames will be exactly equal. */ uint32_t input_needed_for_output(uint32_t output_frame_count) { - return (uint32_t)ceilf((output_frame_count - samples_to_frames(resampling_out_buffer.length())) - * resampling_ratio); - + int32_t unresampled_frames_left = samples_to_frames(resampling_in_buffer.length()); + int32_t resampled_frames_left = samples_to_frames(resampling_out_buffer.length()); + float input_frames_needed = + (output_frame_count - unresampled_frames_left) * resampling_ratio + - resampled_frames_left; + if (input_frames_needed < 0) { + return 0; + } + return (uint32_t)ceilf(input_frames_needed); } /** Returns a pointer to the input buffer, that contains empty space for at -- 2.7.4