ref: bed18c26c3dfc6fce45f024028c4e776b0efa010
parent: 7de6eb2bad6b76ba7d6795a4dc74b8735948651f
author: huili2 <huili2@cisco.com>
date: Wed May 28 20:26:04 EDT 2014
enable dynamic AU size in decoder
--- a/codec/decoder/core/inc/decoder_context.h
+++ b/codec/decoder/core/inc/decoder_context.h
@@ -233,6 +233,7 @@
SVlcTable sVlcTable; // vlc table
SBitStringAux sBs;
+ int32_t iMaxBsBufferSizeInByte; //actual memory size for BS buffer
/* Global memory external */
--- a/codec/decoder/core/inc/decoder_core.h
+++ b/codec/decoder/core/inc/decoder_core.h
@@ -48,8 +48,30 @@
#include "codec_def.h"
namespace WelsDec {+/*
+ * InitBsBuffer
+ * Memory allocation for Bitstream Buffer
+ * return:
+ * 0 - success; otherwise returned error_no defined in error_no.h.
+ */
+int32_t InitBsBuffer (PWelsDecoderContext pCtx);
/*
+ * ExpandBsBuffer
+ * Expand current BS buffer and copy its content
+ * new buffer size will consider input size as a reference
+ * return:
+ * 0 - success; otherwise returned error_no defined in error_no.h.
+ */
+int32_t ExpandBsBuffer (PWelsDecoderContext pCtx, const int32_t kiSrcLen);
+
+/*
+ * CheckBsBuffer
+ * Check if current buffer size is enough
+ */
+int32_t CheckBsBuffer (PWelsDecoderContext pCtx, const int32_t kiSrcLen);
+
+/*
* WelsInitMemory
* Memory request for introduced data
* Especially for:
@@ -56,7 +78,7 @@
* rbsp_au_buffer, cur_dq_layer_ptr and ref_dq_layer_ptr in MB info cache.
* return:
* 0 - success; otherwise returned error_no defined in error_no.h.
-*/
+ */
int32_t WelsInitMemory (PWelsDecoderContext pCtx);
/*
--- a/codec/decoder/core/inc/wels_const.h
+++ b/codec/decoder/core/inc/wels_const.h
@@ -92,8 +92,9 @@
#define LAYER_NUM_EXCHANGEABLE 1
#define MAX_NAL_UNIT_NUM_IN_AU 32 // predefined maximal number of NAL Units in an access unit
-#define MAX_ACCESS_UNIT_CAPACITY 1048576 // Maximal AU capacity in bytes: (1<<20) = 1024 KB predefined
-#define BS_BUFFER_SIZE (MAX_ACCESS_UNIT_CAPACITY * 3) //for delay case, keep three AU size to prevent buffer overwrite
+#define MIN_ACCESS_UNIT_CAPACITY 1048576 // Min AU capacity in bytes: (1<<20) = 1024 KB predefined
+#define MAX_BUFFERED_NUM 3 //mamixum stored number of AU|packet to prevent overwrite
+#define MAX_ACCESS_UNIT_CAPACITY 7077888 //Maximum AU size in bytes for level 5.2 for single frame
#define MAX_MACROBLOCK_CAPACITY 5000 //Maximal legal MB capacity, 15000 bits is enough
#endif//WELS_CONSTANCE_H__
--- a/codec/decoder/core/src/decoder_core.cpp
+++ b/codec/decoder/core/src/decoder_core.cpp
@@ -297,6 +297,57 @@
return true;
}
+int32_t InitBsBuffer (PWelsDecoderContext pCtx) {+ if (pCtx == NULL)
+ return ERR_INFO_INVALID_PTR;
+
+ pCtx->iMaxBsBufferSizeInByte = MIN_ACCESS_UNIT_CAPACITY * MAX_BUFFERED_NUM;
+ if ((pCtx->sRawData.pHead = static_cast<uint8_t*> (WelsMalloc (pCtx->iMaxBsBufferSizeInByte,
+ "pCtx->sRawData.pHead"))) == NULL) {+ return ERR_INFO_OUT_OF_MEMORY;
+ }
+ pCtx->sRawData.pStartPos = pCtx->sRawData.pCurPos = pCtx->sRawData.pHead;
+ pCtx->sRawData.pEnd = pCtx->sRawData.pHead + pCtx->iMaxBsBufferSizeInByte;
+ return ERR_NONE;
+}
+
+int32_t ExpandBsBuffer (PWelsDecoderContext pCtx, const int kiSrcLen) {+ if (pCtx == NULL)
+ return ERR_INFO_INVALID_PTR;
+ int32_t iExpandStepShift = 1;
+ int32_t iNewBuffLen = WELS_MAX ((kiSrcLen * MAX_BUFFERED_NUM), (pCtx->iMaxBsBufferSizeInByte << iExpandStepShift));
+ //allocate new bs buffer
+ uint8_t* pNewBsBuff = static_cast<uint8_t*> (WelsMalloc (iNewBuffLen, "pCtx->sRawData.pHead"));
+ if (pNewBsBuff == NULL)
+ return ERR_INFO_OUT_OF_MEMORY;
+
+ //Copy current buffer status to new buffer
+ memcpy (pNewBsBuff, pCtx->sRawData.pHead, pCtx->iMaxBsBufferSizeInByte);
+ pCtx->iMaxBsBufferSizeInByte = iNewBuffLen;
+ pCtx->sRawData.pStartPos = pNewBsBuff + (pCtx->sRawData.pStartPos - pCtx->sRawData.pHead);
+ pCtx->sRawData.pCurPos = pNewBsBuff + (pCtx->sRawData.pCurPos - pCtx->sRawData.pHead);
+ pCtx->sRawData.pEnd = pNewBsBuff + iNewBuffLen;
+ WelsFree (pCtx->sRawData.pHead, "pCtx->sRawData.pHead");
+ pCtx->sRawData.pHead = pNewBsBuff;
+ return ERR_NONE;
+}
+
+int32_t CheckBsBuffer (PWelsDecoderContext pCtx, const int32_t kiSrcLen) {+ if (kiSrcLen > MAX_ACCESS_UNIT_CAPACITY) { //exceeds max allowed data+ WelsLog (pCtx, WELS_LOG_WARNING, "Max AU size exceeded. Allowed size = %d, current size = %d", MAX_ACCESS_UNIT_CAPACITY,
+ kiSrcLen);
+ pCtx->iErrorCode |= dsBitstreamError;
+ return ERR_INFO_INVALID_ACCESS;
+ } else if (kiSrcLen > pCtx->iMaxBsBufferSizeInByte /
+ MAX_BUFFERED_NUM) { //may lead to buffer overwrite, prevent it by expanding buffer+ if (ExpandBsBuffer (pCtx, kiSrcLen)) {+ return ERR_INFO_OUT_OF_MEMORY;
+ }
+ }
+
+ return ERR_NONE;
+}
+
/*
* WelsInitMemory
* Memory request for new introduced data
@@ -313,13 +364,8 @@
if (MemInitNalList (&pCtx->pAccessUnitList, MAX_NAL_UNIT_NUM_IN_AU) != 0)
return ERR_INFO_OUT_OF_MEMORY;
- if ((pCtx->sRawData.pHead = static_cast<uint8_t*> (WelsMalloc (BS_BUFFER_SIZE,
- "pCtx->sRawData->pHead"))) == NULL) {+ if (InitBsBuffer (pCtx) != 0)
return ERR_INFO_OUT_OF_MEMORY;
- }
- pCtx->sRawData.pStartPos =
- pCtx->sRawData.pCurPos = pCtx->sRawData.pHead;
- pCtx->sRawData.pEnd = pCtx->sRawData.pHead + BS_BUFFER_SIZE;
pCtx->uiTargetDqId = (uint8_t) - 1;
pCtx->bEndOfStreamFlag = false;
--- a/codec/decoder/plus/src/welsDecoderExt.cpp
+++ b/codec/decoder/plus/src/welsDecoderExt.cpp
@@ -49,6 +49,7 @@
//#include "macros.h"
#include "decoder.h"
+#include "decoder_core.h"
extern "C" {#include "decoder_core.h"
@@ -322,11 +323,7 @@
const int kiSrcLen,
unsigned char** ppDst,
SBufferInfo* pDstInfo) {- if (kiSrcLen > MAX_ACCESS_UNIT_CAPACITY - MAX_MACROBLOCK_CAPACITY) {//prevent from residual reading overflow- m_pDecContext->iErrorCode |= dsOutOfMemory;
- IWelsTrace::WelsVTrace (m_pTrace, IWelsTrace::WELS_LOG_INFO,
- "max AU size exceeded. Allowed size = %d, current size = %d",
- MAX_ACCESS_UNIT_CAPACITY - MAX_MACROBLOCK_CAPACITY, kiSrcLen);
+ if (CheckBsBuffer (m_pDecContext, kiSrcLen)) {return dsOutOfMemory;
}
if (kiSrcLen > 0 && kpSrc != NULL) {