ref: 56782172bd590df0ddbbe49926fd10761383248b
dir: /src/h264bsd_vui.c/
/*
* Copyright (C) 2009 The Android Open Source Project
* Modified for use by h264bsd standalone library
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*------------------------------------------------------------------------------
Table of contents
1. Include headers
2. External compiler flags
3. Module defines
4. Local function prototypes
5. Functions
h264bsdDecodeVuiParameters
DecodeHrdParameters
------------------------------------------------------------------------------*/
/*------------------------------------------------------------------------------
1. Include headers
------------------------------------------------------------------------------*/
#include "h264bsd_vui.h"
#include "basetype.h"
#include "h264bsd_vlc.h"
#include "h264bsd_stream.h"
#include "h264bsd_cfg.h"
#include "h264bsd_util.h"
/*------------------------------------------------------------------------------
2. External compiler flags
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
3. Module defines
------------------------------------------------------------------------------*/
#define MAX_DPB_SIZE 16
#define MAX_BR 240000 /* for level 5.1 */
#define MAX_CPB 240000 /* for level 5.1 */
/*------------------------------------------------------------------------------
4. Local function prototypes
------------------------------------------------------------------------------*/
static u32 DecodeHrdParameters(
strmData_t *pStrmData,
hrdParameters_t *pHrdParameters);
/*------------------------------------------------------------------------------
Function: h264bsdDecodeVuiParameters
Functional description:
Decode VUI parameters from the stream. See standard for details.
Inputs:
pStrmData pointer to stream data structure
Outputs:
pVuiParameters decoded information is stored here
Returns:
HANTRO_OK success
HANTRO_NOK invalid stream data or end of stream
------------------------------------------------------------------------------*/
u32 h264bsdDecodeVuiParameters(strmData_t *pStrmData,
vuiParameters_t *pVuiParameters)
{
/* Variables */
u32 tmp;
/* Code */
ASSERT(pStrmData);
ASSERT(pVuiParameters);
memset(pVuiParameters, 0, sizeof(vuiParameters_t));
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->aspectRatioPresentFlag = (tmp == 1) ?
HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->aspectRatioPresentFlag)
{
tmp = h264bsdGetBits(pStrmData, 8);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->aspectRatioIdc = tmp;
if (pVuiParameters->aspectRatioIdc == ASPECT_RATIO_EXTENDED_SAR)
{
tmp = h264bsdGetBits(pStrmData, 16);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->sarWidth = tmp;
tmp = h264bsdGetBits(pStrmData, 16);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->sarHeight = tmp;
}
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->overscanInfoPresentFlag = (tmp == 1) ?
HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->overscanInfoPresentFlag)
{
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->overscanAppropriateFlag = (tmp == 1) ?
HANTRO_TRUE : HANTRO_FALSE;
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->videoSignalTypePresentFlag = (tmp == 1) ?
HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->videoSignalTypePresentFlag)
{
tmp = h264bsdGetBits(pStrmData, 3);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->videoFormat = tmp;
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->videoFullRangeFlag = (tmp == 1) ?
HANTRO_TRUE : HANTRO_FALSE;
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->colourDescriptionPresentFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->colourDescriptionPresentFlag)
{
tmp = h264bsdGetBits(pStrmData, 8);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->colourPrimaries = tmp;
tmp = h264bsdGetBits(pStrmData, 8);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->transferCharacteristics = tmp;
tmp = h264bsdGetBits(pStrmData, 8);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->matrixCoefficients = tmp;
}
else
{
pVuiParameters->colourPrimaries = 2;
pVuiParameters->transferCharacteristics = 2;
pVuiParameters->matrixCoefficients = 2;
}
}
else
{
pVuiParameters->videoFormat = 5;
pVuiParameters->colourPrimaries = 2;
pVuiParameters->transferCharacteristics = 2;
pVuiParameters->matrixCoefficients = 2;
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->chromaLocInfoPresentFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->chromaLocInfoPresentFlag)
{
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->chromaSampleLocTypeTopField);
if (tmp != HANTRO_OK)
return(tmp);
if (pVuiParameters->chromaSampleLocTypeTopField > 5)
return(HANTRO_NOK);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->chromaSampleLocTypeBottomField);
if (tmp != HANTRO_OK)
return(tmp);
if (pVuiParameters->chromaSampleLocTypeBottomField > 5)
return(HANTRO_NOK);
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->timingInfoPresentFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->timingInfoPresentFlag)
{
tmp = h264bsdShowBits32(pStrmData);
if (h264bsdFlushBits(pStrmData, 32) == END_OF_STREAM)
return(HANTRO_NOK);
if (tmp == 0)
return(HANTRO_NOK);
pVuiParameters->numUnitsInTick = tmp;
tmp = h264bsdShowBits32(pStrmData);
if (h264bsdFlushBits(pStrmData, 32) == END_OF_STREAM)
return(HANTRO_NOK);
if (tmp == 0)
return(HANTRO_NOK);
pVuiParameters->timeScale = tmp;
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->fixedFrameRateFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->nalHrdParametersPresentFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->nalHrdParametersPresentFlag)
{
tmp = DecodeHrdParameters(pStrmData, &pVuiParameters->nalHrdParameters);
if (tmp != HANTRO_OK)
return(tmp);
}
else
{
pVuiParameters->nalHrdParameters.cpbCnt = 1;
/* MaxBR and MaxCPB should be the values correspondig to the levelIdc
* in the SPS containing these VUI parameters. However, these values
* are not used anywhere and maximum for any level will be used here */
pVuiParameters->nalHrdParameters.bitRateValue[0] = 1200 * MAX_BR + 1;
pVuiParameters->nalHrdParameters.cpbSizeValue[0] = 1200 * MAX_CPB + 1;
pVuiParameters->nalHrdParameters.initialCpbRemovalDelayLength = 24;
pVuiParameters->nalHrdParameters.cpbRemovalDelayLength = 24;
pVuiParameters->nalHrdParameters.dpbOutputDelayLength = 24;
pVuiParameters->nalHrdParameters.timeOffsetLength = 24;
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->vclHrdParametersPresentFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->vclHrdParametersPresentFlag)
{
tmp = DecodeHrdParameters(pStrmData, &pVuiParameters->vclHrdParameters);
if (tmp != HANTRO_OK)
return(tmp);
}
else
{
pVuiParameters->vclHrdParameters.cpbCnt = 1;
/* MaxBR and MaxCPB should be the values correspondig to the levelIdc
* in the SPS containing these VUI parameters. However, these values
* are not used anywhere and maximum for any level will be used here */
pVuiParameters->vclHrdParameters.bitRateValue[0] = 1000 * MAX_BR + 1;
pVuiParameters->vclHrdParameters.cpbSizeValue[0] = 1000 * MAX_CPB + 1;
pVuiParameters->vclHrdParameters.initialCpbRemovalDelayLength = 24;
pVuiParameters->vclHrdParameters.cpbRemovalDelayLength = 24;
pVuiParameters->vclHrdParameters.dpbOutputDelayLength = 24;
pVuiParameters->vclHrdParameters.timeOffsetLength = 24;
}
if (pVuiParameters->nalHrdParametersPresentFlag ||
pVuiParameters->vclHrdParametersPresentFlag)
{
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->lowDelayHrdFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
}
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->picStructPresentFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->bitstreamRestrictionFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
if (pVuiParameters->bitstreamRestrictionFlag)
{
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pVuiParameters->motionVectorsOverPicBoundariesFlag =
(tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->maxBytesPerPicDenom);
if (tmp != HANTRO_OK)
return(tmp);
if (pVuiParameters->maxBytesPerPicDenom > 16)
return(HANTRO_NOK);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->maxBitsPerMbDenom);
if (tmp != HANTRO_OK)
return(tmp);
if (pVuiParameters->maxBitsPerMbDenom > 16)
return(HANTRO_NOK);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->log2MaxMvLengthHorizontal);
if (tmp != HANTRO_OK)
return(tmp);
if (pVuiParameters->log2MaxMvLengthHorizontal > 16)
return(HANTRO_NOK);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->log2MaxMvLengthVertical);
if (tmp != HANTRO_OK)
return(tmp);
if (pVuiParameters->log2MaxMvLengthVertical > 16)
return(HANTRO_NOK);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->numReorderFrames);
if (tmp != HANTRO_OK)
return(tmp);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pVuiParameters->maxDecFrameBuffering);
if (tmp != HANTRO_OK)
return(tmp);
}
else
{
pVuiParameters->motionVectorsOverPicBoundariesFlag = HANTRO_TRUE;
pVuiParameters->maxBytesPerPicDenom = 2;
pVuiParameters->maxBitsPerMbDenom = 1;
pVuiParameters->log2MaxMvLengthHorizontal = 16;
pVuiParameters->log2MaxMvLengthVertical = 16;
pVuiParameters->numReorderFrames = MAX_DPB_SIZE;
pVuiParameters->maxDecFrameBuffering = MAX_DPB_SIZE;
}
return(HANTRO_OK);
}
/*------------------------------------------------------------------------------
Function: DecodeHrdParameters
Functional description:
Decode HRD parameters from the stream. See standard for details.
Inputs:
pStrmData pointer to stream data structure
Outputs:
pHrdParameters decoded information is stored here
Returns:
HANTRO_OK success
HANTRO_NOK invalid stream data
------------------------------------------------------------------------------*/
static u32 DecodeHrdParameters(
strmData_t *pStrmData,
hrdParameters_t *pHrdParameters)
{
/* Variables */
u32 tmp, i;
/* Code */
ASSERT(pStrmData);
ASSERT(pHrdParameters);
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData, &pHrdParameters->cpbCnt);
if (tmp != HANTRO_OK)
return(tmp);
/* cpbCount = cpb_cnt_minus1 + 1 */
pHrdParameters->cpbCnt++;
if (pHrdParameters->cpbCnt > MAX_CPB_CNT)
return(HANTRO_NOK);
tmp = h264bsdGetBits(pStrmData, 4);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->bitRateScale = tmp;
tmp = h264bsdGetBits(pStrmData, 4);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->cpbSizeScale = tmp;
for (i = 0; i < pHrdParameters->cpbCnt; i++)
{
/* bit_rate_value_minus1 in the range [0, 2^32 - 2] */
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pHrdParameters->bitRateValue[i]);
if (tmp != HANTRO_OK)
return(tmp);
if (pHrdParameters->bitRateValue[i] > 4294967294U)
return(HANTRO_NOK);
pHrdParameters->bitRateValue[i]++;
/* this may result in overflow, but this value is not used for
* anything */
pHrdParameters->bitRateValue[i] *=
1 << (6 + pHrdParameters->bitRateScale);
/* cpb_size_value_minus1 in the range [0, 2^32 - 2] */
tmp = h264bsdDecodeExpGolombUnsigned(pStrmData,
&pHrdParameters->cpbSizeValue[i]);
if (tmp != HANTRO_OK)
return(tmp);
if (pHrdParameters->cpbSizeValue[i] > 4294967294U)
return(HANTRO_NOK);
pHrdParameters->cpbSizeValue[i]++;
/* this may result in overflow, but this value is not used for
* anything */
pHrdParameters->cpbSizeValue[i] *=
1 << (4 + pHrdParameters->cpbSizeScale);
tmp = h264bsdGetBits(pStrmData, 1);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->cbrFlag[i] = (tmp == 1) ? HANTRO_TRUE : HANTRO_FALSE;
}
tmp = h264bsdGetBits(pStrmData, 5);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->initialCpbRemovalDelayLength = tmp + 1;
tmp = h264bsdGetBits(pStrmData, 5);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->cpbRemovalDelayLength = tmp + 1;
tmp = h264bsdGetBits(pStrmData, 5);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->dpbOutputDelayLength = tmp + 1;
tmp = h264bsdGetBits(pStrmData, 5);
if (tmp == END_OF_STREAM)
return(HANTRO_NOK);
pHrdParameters->timeOffsetLength = tmp;
return(HANTRO_OK);
}