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Clamp results of GetResampler(AvailableOutput|NeededInput)Frames

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Brick 2023-08-20 23:03:32 +01:00 committed by Ryan C. Gordon
parent d2b9c8b80d
commit 96e47f1657
1 changed files with 4 additions and 4 deletions
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8
src/audio/SDL_audiocvt.c
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@ -45,16 +45,16 @@ static Sint64 GetResampleRate(const int src_rate, const int dst_rate)
static size_t GetResamplerAvailableOutputFrames(const size_t input_frames, const Sint64 resample_rate, const Sint64 resample_offset) static size_t GetResamplerAvailableOutputFrames(const size_t input_frames, const Sint64 resample_rate, const Sint64 resample_offset)
{ {
SDL_assert(resample_offset < resample_rate); const Sint64 frames = ((((Sint64)input_frames << 32) - resample_offset - 1) / resample_rate) + 1;
return (size_t)((((Sint64)input_frames << 32) - resample_offset + resample_rate - 1) / resample_rate); return (size_t) SDL_max(frames, 0);
} }
static int GetResamplerNeededInputFrames(const int output_frames, const Sint64 resample_rate, const Sint64 resample_offset) static int GetResamplerNeededInputFrames(const int output_frames, const Sint64 resample_rate, const Sint64 resample_offset)
{ {
const Sint64 lastpos = ((output_frames - 1) * resample_rate) + resample_offset; const Sint32 frames = (Sint32)((((output_frames - 1) * resample_rate) + resample_offset) >> 32) + 1;
return (int)(Sint32)(lastpos >> 32) + 1; return (int) SDL_max(frames, 0);
} }
static int GetResamplerPaddingFrames(const Sint64 resample_rate) static int GetResamplerPaddingFrames(const Sint64 resample_rate)