4de81ee1f1
This is a debug tool used to detect bitstream error. On encoder side, it pushes each bit and probability into a queue before the bit is written into the Arithmetic coder. On decoder side, whenever a bit is read out from the Arithmetic coder, it pops up the reference bit and probability from the queue as well. If the two results do not match, this debug tool will report an error. This tool can be used to pin down the bitstream error precisely. By combining gdb's backtrace method, we can detect which module causes the bitstream error. Change-Id: I133a4371fafdd48c488f2ca47f9e395676c401f2
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
/*
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* Copyright (c) 2016 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VPX_UTIL_DEBUG_UTIL_H_
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#define VPX_UTIL_DEBUG_UTIL_H_
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#include "./vpx_config.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if CONFIG_BITSTREAM_DEBUG
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/* This is a debug tool used to detect bitstream error. On encoder side, it
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* pushes each bit and probability into a queue before the bit is written into
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* the Arithmetic coder. On decoder side, whenever a bit is read out from the
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* Arithmetic coder, it pops out the reference bit and probability from the
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* queue as well. If the two results do not match, this debug tool will report
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* an error. This tool can be used to pin down the bitstream error precisely.
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* By combining gdb's backtrace method, we can detect which module causes the
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* bitstream error. */
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int bitstream_queue_get_write(void);
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int bitstream_queue_get_read(void);
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void bitstream_queue_record_write(void);
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void bitstream_queue_reset_write(void);
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void bitstream_queue_pop(int *result, int *prob);
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void bitstream_queue_push(int result, int prob);
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void bitstream_queue_set_skip_write(int skip);
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void bitstream_queue_set_skip_read(int skip);
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#endif // CONFIG_BITSTREAM_DEBUG
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VPX_UTIL_DEBUG_UTIL_H_
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