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Make mal_convert_frames() return consistent values.

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This commit is contained in:
David Reid
2018-05-22 21:06:07 +10:00
parent eb7ac83beb
commit 1fd432b8f3
1 changed files with 41 additions and 3 deletions
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mini_al.h
+41 -3
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@@ -20621,6 +20621,7 @@ typedef struct
mal_uint32 channelsIn;
mal_uint64 totalFrameCount;
mal_uint64 iNextFrame;
mal_bool32 isFeedingZeros; // When set to true, feeds the DSP zero samples.
} mal_convert_frames__data;
mal_uint32 mal_convert_frames__on_read(mal_dsp* pDSP, mal_uint32 frameCount, void* pFramesOut, void* pUserData)
@@ -20637,8 +20638,13 @@ mal_uint32 mal_convert_frames__on_read(mal_dsp* pDSP, mal_uint32 frameCount, voi
framesToRead = (mal_uint32)framesRemaining;
}
mal_uint32 frameSizeInBytes = mal_get_bytes_per_sample(pData->formatIn) * pData->channelsIn;
mal_copy_memory(pFramesOut, (const mal_uint8*)pData->pDataIn + (frameSizeInBytes * pData->iNextFrame), frameSizeInBytes * framesToRead);
mal_uint32 frameSizeInBytes = mal_get_bytes_per_frame(pData->formatIn, pData->channelsIn);
if (!pData->isFeedingZeros) {
mal_copy_memory(pFramesOut, (const mal_uint8*)pData->pDataIn + (frameSizeInBytes * pData->iNextFrame), frameSizeInBytes * framesToRead);
} else {
mal_zero_memory(pFramesOut, frameSizeInBytes * framesToRead);
}
pData->iNextFrame += framesToRead;
return framesToRead;
@@ -20709,6 +20715,7 @@ mal_uint64 mal_convert_frames_ex(void* pOut, mal_format formatOut, mal_uint32 ch
data.channelsIn = channelsIn;
data.totalFrameCount = frameCountIn;
data.iNextFrame = 0;
data.isFeedingZeros = MAL_FALSE;
mal_dsp_config config;
mal_zero_object(&config);
@@ -20739,7 +20746,38 @@ mal_uint64 mal_convert_frames_ex(void* pOut, mal_format formatOut, mal_uint32 ch
return 0;
}
return mal_dsp_read(&dsp, frameCountOut, pOut, dsp.pUserData);
// Always output our computed frame count. There is a chance the sample rate conversion routine may not output the last sample
// due to precision issues with 32-bit floats, in which case we should feed the DSP zero samples so it can generate that last
// frame.
mal_uint64 totalFramesRead = mal_dsp_read(&dsp, frameCountOut, pOut, dsp.pUserData);
if (totalFramesRead < frameCountOut) {
mal_uint32 bpf = mal_get_bytes_per_frame(formatIn, channelsIn);
data.isFeedingZeros = MAL_TRUE;
data.totalFrameCount = 0xFFFFFFFFFFFFFFFF;
data.pDataIn = NULL;
while (totalFramesRead < frameCountOut) {
mal_uint64 framesToRead = (frameCountOut - totalFramesRead);
mal_assert(framesToRead > 0);
mal_uint64 framesJustRead = mal_dsp_read(&dsp, framesToRead, mal_offset_ptr(pOut, totalFramesRead * bpf), dsp.pUserData);
totalFramesRead += framesJustRead;
if (framesJustRead < framesToRead) {
break;
}
}
// At this point we should have output every sample, but just to be super duper sure, just fill the rest with zeros.
if (totalFramesRead < frameCountOut) {
mal_zero_memory_64(mal_offset_ptr(pOut, totalFramesRead * bpf), ((frameCountOut - totalFramesRead) * bpf));
totalFramesRead = frameCountOut;
}
}
mal_assert(totalFramesRead == frameCountOut);
return totalFramesRead;
}