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|
/* ------------------------------------------------------------------
* Copyright (C) 1998-2009 PacketVideo
*
* 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.
* -------------------------------------------------------------------
*/
#include "mp4def.h"
#include "mp4enc_lib.h"
#include "mp4lib_int.h"
#include "bitstream_io.h"
#include "vlc_encode.h"
#include "m4venc_oscl.h"
PV_STATUS EncodeGOBHeader(VideoEncData *video, Int GOB_number, Int quant_scale, Int bs1stream);
/* ======================================================================== */
/* Function : EncodeFrameCombinedMode() */
/* Date : 09/01/2000 */
/* History : */
/* Purpose : Encode a frame of MPEG4 bitstream in Combined mode. */
/* In/out : */
/* Return : PV_SUCCESS if successful else PV_FAIL */
/* Modified : */
/* */
/* ======================================================================== */
PV_STATUS EncodeFrameCombinedMode(VideoEncData *video)
{
PV_STATUS status = PV_SUCCESS;
Vol *currVol = video->vol[video->currLayer];
Vop *currVop = video->currVop;
VideoEncParams *encParams = video->encParams;
Int width = currVop->width; /* has to be Vop, for multiple of 16 */
Int lx = currVop->pitch; /* with padding */
Int offset = 0;
Int ind_x, ind_y;
Int start_packet_header = 0;
UChar *QPMB = video->QPMB;
Int QP;
Int mbnum = 0, slice_counter = 0, curr_slice_counter = 0;
Int num_bits, packet_size = encParams->ResyncPacketsize;
Int GOB_Header_Interval = encParams->GOB_Header_Interval;
BitstreamEncVideo *bs1 = video->bitstream1;
Int numHeaderBits;
approxDCT fastDCTfunction;
Int ncoefblck[6] = {64, 64, 64, 64, 64, 64}; /* for FastCodeMB, 5/18/2001 */
PV_STATUS(*CodeMB)(VideoEncData *, approxDCT *, Int, Int[]);
void (*MBVlcEncode)(VideoEncData*, Int[], void *);
void (*BlockCodeCoeff)(RunLevelBlock*, BitstreamEncVideo*, Int, Int, UChar);
/* for H263 GOB changes */
//MP4RateControlType rc_type = encParams->RC_Type;
video->QP_prev = currVop->quantizer;
numHeaderBits = BitstreamGetPos(bs1);
/* determine type of quantization */
#ifndef NO_MPEG_QUANT
if (currVol->quantType == 0)
CodeMB = &CodeMB_H263;
else
CodeMB = &CodeMB_MPEG;
#else
CodeMB = &CodeMB_H263;
#endif
/* determine which functions to be used, in MB-level */
if (currVop->predictionType == P_VOP)
MBVlcEncode = &MBVlcEncodeCombined_P_VOP;
else if (currVop->predictionType == I_VOP)
MBVlcEncode = &MBVlcEncodeCombined_I_VOP;
else /* B_VOP not implemented yet */
return PV_FAIL;
/* determine which VLC table to be used */
#ifndef H263_ONLY
if (currVol->shortVideoHeader)
BlockCodeCoeff = &BlockCodeCoeff_ShortHeader;
#ifndef NO_RVLC
else if (currVol->useReverseVLC)
BlockCodeCoeff = &BlockCodeCoeff_RVLC;
#endif
else
BlockCodeCoeff = &BlockCodeCoeff_Normal;
#else
BlockCodeCoeff = &BlockCodeCoeff_ShortHeader;
#endif
/* gob_frame_id is the same for different vop types - the reason should be SCD */
if (currVol->shortVideoHeader && currVop->gobFrameID != currVop->predictionType)
currVop->gobFrameID = currVop->predictionType;
video->usePrevQP = 0;
for (ind_y = 0; ind_y < currVol->nMBPerCol; ind_y++) /* Col MB Loop */
{
video->outputMB->mb_y = ind_y; /* 5/28/01 */
if (currVol->shortVideoHeader) /* ShortVideoHeader Mode */
{
if (slice_counter && GOB_Header_Interval && (ind_y % GOB_Header_Interval == 0)) /* Encode GOB Header */
{
QP = QPMB[mbnum]; /* Get quant_scale */
video->header_bits -= BitstreamGetPos(currVol->stream); /* Header Bits */
status = EncodeGOBHeader(video, slice_counter, QP, 0); //ind_y /* Encode GOB Header */
video->header_bits += BitstreamGetPos(currVol->stream); /* Header Bits */
curr_slice_counter = slice_counter;
}
}
for (ind_x = 0; ind_x < currVol->nMBPerRow; ind_x++) /* Row MB Loop */
{
video->outputMB->mb_x = ind_x; /* 5/28/01 */
video->mbnum = mbnum;
QP = QPMB[mbnum]; /* always read new QP */
if (GOB_Header_Interval)
video->sliceNo[mbnum] = curr_slice_counter; /* Update MB slice number */
else
video->sliceNo[mbnum] = slice_counter;
/****************************************************************************************/
/* MB Prediction:Put into MC macroblock, substract from currVop, put in predMB */
/****************************************************************************************/
getMotionCompensatedMB(video, ind_x, ind_y, offset);
#ifndef H263_ONLY
if (start_packet_header)
{
slice_counter++; /* Increment slice counter */
video->sliceNo[mbnum] = slice_counter; /* Update MB slice number*/
video->header_bits -= BitstreamGetPos(bs1); /* Header Bits */
video->QP_prev = currVop->quantizer;
status = EncodeVideoPacketHeader(video, mbnum, video->QP_prev, 0);
video->header_bits += BitstreamGetPos(bs1); /* Header Bits */
numHeaderBits = BitstreamGetPos(bs1);
start_packet_header = 0;
video->usePrevQP = 0;
}
#endif
/***********************************************/
/* Code_MB: DCT, Q, Q^(-1), IDCT, Motion Comp */
/***********************************************/
status = (*CodeMB)(video, &fastDCTfunction, (offset << 5) + QP, ncoefblck);
/************************************/
/* MB VLC Encode: VLC Encode MB */
/************************************/
(*MBVlcEncode)(video, ncoefblck, (void*)BlockCodeCoeff);
/*************************************************************/
/* Assemble Packets: Assemble the MB VLC codes into Packets */
/*************************************************************/
/* Assemble_Packet(video) */
#ifndef H263_ONLY
if (!currVol->shortVideoHeader) /* Not in ShortVideoHeader mode */
{
if (!currVol->ResyncMarkerDisable) /* RESYNC MARKER MODE */
{
num_bits = BitstreamGetPos(bs1) - numHeaderBits;
if (num_bits > packet_size)
{
video->header_bits += BitstreamMpeg4ByteAlignStuffing(bs1); /* Byte align Packet */
status = BitstreamAppendPacket(currVol->stream, bs1); /* Put Packet to Buffer */
/* continue even if status == PV_END_OF_BUF, to get the stats */
BitstreamEncReset(bs1);
start_packet_header = 1;
}
}
else /* NO RESYNC MARKER MODE */
{
status = BitstreamAppendEnc(currVol->stream, bs1); /* Initialize to 0 */
/* continue even if status == PV_END_OF_BUF, to get the stats */
BitstreamEncReset(bs1);
}
}
else
#endif /* H263_ONLY */
{ /* ShortVideoHeader Mode */
status = BitstreamAppendEnc(currVol->stream, bs1); /* Initialize to 0 */
/* continue even if status == PV_END_OF_BUF, to get the stats */
BitstreamEncReset(bs1);
}
mbnum++;
offset += 16;
} /* End of For ind_x */
offset += (lx << 4) - width;
if (currVol->shortVideoHeader) /* ShortVideoHeader = 1 */
{
if (GOB_Header_Interval) slice_counter++;
}
} /* End of For ind_y */
if (currVol->shortVideoHeader) /* ShortVideoHeader = 1 */
{
video->header_bits += BitstreamShortHeaderByteAlignStuffing(currVol->stream); /* Byte Align */
}
#ifndef H263_ONLY
else /* Combined Mode*/
{
if (!currVol->ResyncMarkerDisable) /* Resync Markers */
{
if (!start_packet_header)
{
video->header_bits += BitstreamMpeg4ByteAlignStuffing(bs1);/* Byte Align */
status = BitstreamAppendPacket(currVol->stream, bs1); /* Put Packet to Buffer */
/* continue even if status == PV_END_OF_BUF, to get the stats */
BitstreamEncReset(bs1);
}
}
else /* No Resync Markers */
{
video->header_bits += BitstreamMpeg4ByteAlignStuffing(currVol->stream); /* Byte Align */
}
}
#endif /* H263_ONLY */
return status; /* if status == PV_END_OF_BUF, this frame will be pre-skipped */
}
#ifndef NO_SLICE_ENCODE
/* ======================================================================== */
/* Function : EncodeSliceCombinedMode() */
/* Date : 04/19/2002 */
/* History : */
/* Purpose : Encode a slice of MPEG4 bitstream in Combined mode and save */
/* the current MB to continue next time it is called. */
/* In/out : */
/* Return : PV_SUCCESS if successful else PV_FAIL */
/* Modified : */
/* */
/* ======================================================================== */
PV_STATUS EncodeSliceCombinedMode(VideoEncData *video)
{
PV_STATUS status = PV_SUCCESS;
Vol *currVol = video->vol[video->currLayer];
Vop *currVop = video->currVop;
UChar mode = MODE_INTRA;
UChar *Mode = video->headerInfo.Mode;
VideoEncParams *encParams = video->encParams;
Int nTotalMB = currVol->nTotalMB;
Int width = currVop->width; /* has to be Vop, for multiple of 16 */
Int lx = currVop->pitch; /* , with padding */
// rateControl *rc = encParams->rc[video->currLayer];
UChar *QPMB = video->QPMB;
Int QP;
Int ind_x = video->outputMB->mb_x, ind_y = video->outputMB->mb_y;
Int offset = video->offset; /* get current MB location */
Int mbnum = video->mbnum, slice_counter = video->sliceNo[mbnum]; /* get current MB location */
Int firstMB = mbnum;
Int start_packet_header = 0;
Int num_bits = 0;
Int packet_size = encParams->ResyncPacketsize - 1;
Int resync_marker = ((!currVol->shortVideoHeader) && (!currVol->ResyncMarkerDisable));
BitstreamEncVideo *bs1 = video->bitstream1;
Int byteCount = 0, byteCount1 = 0, bitCount = 0;
Int numHeaderBits = 0;
approxDCT fastDCTfunction;
Int ncoefblck[6] = {64, 64, 64, 64, 64, 64}; /* for FastCodeMB, 5/18/2001 */
UChar CBP = 0;
Short outputMB[6][64];
Int k;
PV_STATUS(*CodeMB)(VideoEncData *, approxDCT *, Int, Int[]);
void (*MBVlcEncode)(VideoEncData*, Int[], void *);
void (*BlockCodeCoeff)(RunLevelBlock*, BitstreamEncVideo*, Int, Int, UChar);
video->QP_prev = 31;
#define H263_GOB_CHANGES
if (video->end_of_buf) /* left-over from previous run */
{
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1);
if (status != PV_END_OF_BUF)
{
BitstreamEncReset(bs1);
video->end_of_buf = 0;
}
return status;
}
if (mbnum == 0) /* only do this at the start of a frame */
{
QPMB[0] = video->QP_prev = QP = currVop->quantizer;
video->usePrevQP = 0;
numHeaderBits = BitstreamGetPos(bs1);
}
/* Re-assign fast functions on every slice, don't have to put it in the memory */
QP = QPMB[mbnum];
if (mbnum > 0) video->QP_prev = QPMB[mbnum-1];
/* determine type of quantization */
#ifndef NO_MPEG_QUANT
if (currVol->quantType == 0)
CodeMB = &CodeMB_H263;
else
CodeMB = &CodeMB_MPEG;
#else
CodeMB = &CodeMB_H263;
#endif
/* determine which functions to be used, in MB-level */
if (currVop->predictionType == P_VOP)
MBVlcEncode = &MBVlcEncodeCombined_P_VOP;
else if (currVop->predictionType == I_VOP)
MBVlcEncode = &MBVlcEncodeCombined_I_VOP;
else /* B_VOP not implemented yet */
return PV_FAIL;
/* determine which VLC table to be used */
#ifndef H263_ONLY
if (currVol->shortVideoHeader)
BlockCodeCoeff = &BlockCodeCoeff_ShortHeader;
#ifndef NO_RVLC
else if (currVol->useReverseVLC)
BlockCodeCoeff = &BlockCodeCoeff_RVLC;
#endif
else
BlockCodeCoeff = &BlockCodeCoeff_Normal;
#else
BlockCodeCoeff = &BlockCodeCoeff_ShortHeader;
#endif
/* (gob_frame_id is the same for different vop types) The reason should be SCD */
if (currVol->shortVideoHeader && currVop->gobFrameID != currVop->predictionType)
currVop->gobFrameID = currVop->predictionType;
if (mbnum != 0)
{
if (currVol->shortVideoHeader)
{
/* Encode GOB Header */
bitCount = BitstreamGetPos(bs1);
byteCount1 = byteCount = bitCount >> 3; /* save the position before GOB header */
bitCount = bitCount & 0x7;
#ifdef H263_GOB_CHANGES
video->header_bits -= BitstreamGetPos(bs1); /* Header Bits */
status = EncodeGOBHeader(video, slice_counter, QP, 1); //ind_y /* Encode GOB Header */
video->header_bits += BitstreamGetPos(bs1); /* Header Bits */
#endif
goto JUMP_IN_SH;
}
else if (currVol->ResyncMarkerDisable)
{
goto JUMP_IN_SH;
}
else
{
start_packet_header = 1;
goto JUMP_IN;
}
}
for (ind_y = 0; ind_y < currVol->nMBPerCol; ind_y++) /* Col MB Loop */
{
video->outputMB->mb_y = ind_y; /* 5/28/01, do not remove */
for (ind_x = 0; ind_x < currVol->nMBPerRow; ind_x++) /* Row MB Loop */
{
video->outputMB->mb_x = ind_x; /* 5/28/01, do not remove */
video->mbnum = mbnum;
video->sliceNo[mbnum] = slice_counter; /* Update MB slice number */
JUMP_IN_SH:
/****************************************************************************************/
/* MB Prediction:Put into MC macroblock, substract from currVop, put in predMB */
/****************************************************************************************/
getMotionCompensatedMB(video, ind_x, ind_y, offset);
JUMP_IN:
QP = QPMB[mbnum]; /* always read new QP */
#ifndef H263_ONLY
if (start_packet_header)
{
slice_counter++; /* Increment slice counter */
video->sliceNo[mbnum] = slice_counter; /* Update MB slice number*/
video->QP_prev = currVop->quantizer; /* store QP */
num_bits = BitstreamGetPos(bs1);
status = EncodeVideoPacketHeader(video, mbnum, video->QP_prev, 1);
numHeaderBits = BitstreamGetPos(bs1) - num_bits;
video->header_bits += numHeaderBits; /* Header Bits */
start_packet_header = 0;
video->usePrevQP = 0;
}
else /* don't encode the first MB in packet again */
#endif /* H263_ONLY */
{
/***********************************************/
/* Code_MB: DCT, Q, Q^(-1), IDCT, Motion Comp */
/***********************************************/
status = (*CodeMB)(video, &fastDCTfunction, (offset << 5) + QP, ncoefblck);
}
/************************************/
/* MB VLC Encode: VLC Encode MB */
/************************************/
/* save the state before VLC encoding */
if (resync_marker)
{
bitCount = BitstreamGetPos(bs1);
byteCount = bitCount >> 3; /* save the state before encoding */
bitCount = bitCount & 0x7;
mode = Mode[mbnum];
CBP = video->headerInfo.CBP[mbnum];
for (k = 0; k < 6; k++)
{
M4VENC_MEMCPY(outputMB[k], video->outputMB->block[k], sizeof(Short) << 6);
}
}
/*************************************/
(*MBVlcEncode)(video, ncoefblck, (void*)BlockCodeCoeff);
/*************************************************************/
/* Assemble Packets: Assemble the MB VLC codes into Packets */
/*************************************************************/
/* Assemble_Packet(video) */
#ifndef H263_ONLY
if (!currVol->shortVideoHeader)
{
if (!currVol->ResyncMarkerDisable)
{
/* Not in ShortVideoHeader mode and RESYNC MARKER MODE */
num_bits = BitstreamGetPos(bs1) ;//- numHeaderBits; // include header
/* Assemble packet and return when size reached */
if (num_bits > packet_size && mbnum != firstMB)
{
BitstreamRepos(bs1, byteCount, bitCount); /* rewind one MB */
video->header_bits += BitstreamMpeg4ByteAlignStuffing(bs1); /* Byte align Packet */
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1); /* Put Packet to Buffer */
if (status == PV_END_OF_BUF)
{
video->end_of_buf = 1;
}
else
{
BitstreamEncReset(bs1);
}
start_packet_header = 1;
if (mbnum < nTotalMB || video->end_of_buf) /* return here */
{
video->mbnum = mbnum;
video->sliceNo[mbnum] = slice_counter;
video->offset = offset;
Mode[mbnum] = mode;
video->headerInfo.CBP[mbnum] = CBP;
for (k = 0; k < 6; k++)
{
M4VENC_MEMCPY(video->outputMB->block[k], outputMB[k], sizeof(Short) << 6);
}
return status;
}
}
}
else /* NO RESYNC MARKER , return when buffer is full*/
{
if (mbnum < nTotalMB - 1 && currVol->stream->byteCount + bs1->byteCount + 1 >= currVol->stream->bufferSize)
{
/* find maximum bytes to fit in the buffer */
byteCount = currVol->stream->bufferSize - currVol->stream->byteCount - 1;
num_bits = BitstreamGetPos(bs1) - (byteCount << 3);
BitstreamRepos(bs1, byteCount, 0);
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1);
BitstreamFlushBits(bs1, num_bits);
/* move on to next MB */
mbnum++ ;
offset += 16;
video->outputMB->mb_x++;
if (video->outputMB->mb_x >= currVol->nMBPerRow)
{
video->outputMB->mb_x = 0;
video->outputMB->mb_y++;
offset += (lx << 4) - width;
}
video->mbnum = mbnum;
video->offset = offset;
video->sliceNo[mbnum] = slice_counter;
return status;
}
}
}
#endif /* H263_ONLY */
offset += 16;
mbnum++; /* has to increment before SCD, to preserve Mode[mbnum] */
} /* End of For ind_x */
offset += (lx << 4) - width;
if (currVol->shortVideoHeader) /* ShortVideoHeader = 1 */
{
#ifdef H263_GOB_CHANGES
slice_counter++;
video->header_bits += BitstreamShortHeaderByteAlignStuffing(bs1);
#endif
//video->header_bits+=BitstreamShortHeaderByteAlignStuffing(bs1);
/* check if time to packetize */
if (currVol->stream->byteCount + bs1->byteCount > currVol->stream->bufferSize)
{
if (byteCount == byteCount1) /* a single GOB bigger than packet size */
{
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1);
status = PV_END_OF_BUF;
video->end_of_buf = 1;
start_packet_header = 1;
}
else /* for short_header scooch back to previous GOB */
{
num_bits = ((bs1->byteCount - byteCount) << 3);
//num_bits = ((bs1->byteCount<<3) + bs1->bitCount) - ((byteCount<<3) + bitCount);
BitstreamRepos(bs1, byteCount, 0);
//BitstreamRepos(bs1,byteCount,bitCount);
// k = currVol->stream->byteCount; /* save state before appending */
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1);
BitstreamFlushBits(bs1, num_bits);
// if(mbnum == nTotalMB || k + bs1->byteCount >= currVol->stream->bufferSize){
/* last GOB or current one with larger size will be returned next run */
// status = PV_END_OF_BUF;
// video->end_of_buf = 1;
// }
start_packet_header = 1;
if (mbnum == nTotalMB) /* there's one more GOB to packetize for the next round */
{
status = PV_END_OF_BUF;
video->end_of_buf = 1;
}
}
if (mbnum < nTotalMB) /* return here */
{
/* move on to next MB */
video->outputMB->mb_x = 0;
video->outputMB->mb_y++;
video->mbnum = mbnum;
video->offset = offset;
video->sliceNo[mbnum] = slice_counter;
return status;
}
}
else if (mbnum < nTotalMB) /* do not write GOB header if end of vop */
{
bitCount = BitstreamGetPos(bs1);
byteCount = bitCount >> 3; /* save the position before GOB header */
bitCount = bitCount & 0x7;
#ifdef H263_GOB_CHANGES
video->header_bits -= BitstreamGetPos(bs1); /* Header Bits */
status = EncodeGOBHeader(video, slice_counter, QP, 1); /* Encode GOB Header */
video->header_bits += BitstreamGetPos(bs1); /* Header Bits */
#endif
}
}
} /* End of For ind_y */
#ifndef H263_ONLY
if (!currVol->shortVideoHeader) /* Combined Mode*/
{
if (!currVol->ResyncMarkerDisable) /* Resync Markers */
{
if (!start_packet_header)
{
video->header_bits += BitstreamMpeg4ByteAlignStuffing(bs1);/* Byte Align */
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1); /* Put Packet to Buffer */
if (status == PV_END_OF_BUF)
{
video->end_of_buf = 1;
}
else
{
BitstreamEncReset(bs1);
}
}
}
else /* No Resync Markers */
{
video->header_bits += BitstreamMpeg4ByteAlignStuffing(bs1); /* Byte Align */
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1); /* Initialize to 0 */
if (status == PV_END_OF_BUF)
{
video->end_of_buf = 1;
}
else
{
BitstreamEncReset(bs1);
}
}
}
else
#endif /* H263_ONLY */
{
if (!start_packet_header) /* not yet packetized */
{
video->header_bits += BitstreamShortHeaderByteAlignStuffing(bs1);
status = BitstreamAppendPacketNoOffset(currVol->stream, bs1);
if (status == PV_END_OF_BUF)
{
video->end_of_buf = 1;
}
else
{
BitstreamEncReset(bs1);
video->end_of_buf = 0;
}
}
}
video->mbnum = mbnum;
if (mbnum < nTotalMB)
video->sliceNo[mbnum] = slice_counter;
video->offset = offset;
return status;
}
#endif /* NO_SLICE_ENCODE */
/* ======================================================================== */
/* Function : EncodeGOBHeader() */
/* Date : 09/05/2000 */
/* History : */
/* Purpose : Encode a frame of MPEG4 bitstream in Combined mode. */
/* In/out : */
/* Return : PV_SUCCESS if successful else PV_FAIL */
/* Modified : */
/* */
/* ======================================================================== */
PV_STATUS EncodeGOBHeader(VideoEncData *video, Int GOB_number, Int quant_scale, Int bs1stream)
{
PV_STATUS status = PV_SUCCESS;
BitstreamEncVideo *stream = (bs1stream ? video->bitstream1 : video->vol[video->currLayer]->stream);
status = BitstreamPutGT16Bits(stream, 17, GOB_RESYNC_MARKER); /* gob_resync_marker */
status = BitstreamPutBits(stream, 5, GOB_number); /* Current gob_number */
status = BitstreamPutBits(stream, 2, video->currVop->gobFrameID); /* gob_frame_id */
status = BitstreamPutBits(stream, 5, quant_scale); /* quant_scale */
return status;
}
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