mirror of
https://github.com/tuxbox-neutrino/libstb-hal.git
synced 2025-08-26 15:02:58 +02:00
295 lines
9.0 KiB
C
295 lines
9.0 KiB
C
/*
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* linuxdvb output/writer handling.
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*
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* konfetti 2010 based on linuxdvb.c code from libeplayer2
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* ***************************** */
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/* Includes */
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/* ***************************** */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <linux/dvb/video.h>
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#include <linux/dvb/audio.h>
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#include <memory.h>
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#include <asm/types.h>
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#include <pthread.h>
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#include <errno.h>
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#include "common.h"
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#include "output.h"
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#include "debug.h"
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#include "stm_ioctls.h"
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#include "misc.h"
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#include "pes.h"
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#include "writer.h"
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/* ***************************** */
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/* Makros/Constants */
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/* ***************************** */
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#define WMV3_PRIVATE_DATA_LENGTH 4
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#define METADATA_STRUCT_A_START 12
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#define METADATA_STRUCT_B_START 24
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#define METADATA_STRUCT_B_FRAMERATE_START 32
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#define METADATA_STRUCT_C_START 8
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#define VC1_SEQUENCE_LAYER_METADATA_START_CODE 0x80
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#define VC1_FRAME_START_CODE 0x0d
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#define VC1_DEBUG
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#ifdef VC1_DEBUG
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static short debug_level = 0;
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#define vc1_printf(level, fmt, x...) do { \
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if (debug_level >= level) printf("[%s:%s] " fmt, __FILE__, __FUNCTION__, ## x); } while (0)
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#else
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#define vc1_printf(level, fmt, x...)
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#endif
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#ifndef VC1_SILENT
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#define vc1_err(fmt, x...) do { printf("[%s:%s] " fmt, __FILE__, __FUNCTION__, ## x); } while (0)
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#else
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#define vc1_err(fmt, x...)
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#endif
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/* ***************************** */
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/* Types */
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/* ***************************** */
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static const unsigned char SequenceLayerStartCode[] = {0x00, 0x00, 0x01, VC1_SEQUENCE_LAYER_METADATA_START_CODE};
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static const unsigned char Metadata[] =
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{
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0x00, 0x00, 0x00, 0xc5,
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0x04, 0x00, 0x00, 0x00,
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0xc0, 0x00, 0x00, 0x00, /* Struct C set for for advanced profile*/
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0x00, 0x00, 0x00, 0x00, /* Struct A */
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0x00, 0x00, 0x00, 0x00,
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0x0c, 0x00, 0x00, 0x00,
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0x60, 0x00, 0x00, 0x00, /* Struct B */
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00
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};
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/* ***************************** */
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/* Varaibles */
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/* ***************************** */
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static int initialHeader = 1;
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static unsigned char FrameHeaderSeen = 0;
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/* ***************************** */
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/* Prototypes */
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/* ***************************** */
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/* ***************************** */
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/* MISC Functions */
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/* ***************************** */
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static int reset()
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{
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initialHeader = 1;
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FrameHeaderSeen = 0;
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return 0;
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}
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static int writeData(void* _call)
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{
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WriterAVCallData_t* call = (WriterAVCallData_t*) _call;
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int len = 0;
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vc1_printf(10, "\n");
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if (call == NULL) {
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vc1_err("call data is NULL...\n");
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return 0;
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}
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vc1_printf(10, "VideoPts %lld\n", call->Pts);
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vc1_printf(10, "Got Private Size %d\n", call->private_size);
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if ((call->data == NULL) || (call->len <= 0)) {
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vc1_err("parsing NULL Data. ignoring...\n");
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return 0;
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}
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if (call->fd < 0) {
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vc1_err("file pointer < 0. ignoring ...\n");
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return 0;
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}
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if (initialHeader) {
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unsigned char PesPacket[PES_MIN_HEADER_SIZE+128];
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unsigned char* PesPtr;
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unsigned int MetadataLength;
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unsigned int crazyFramerate = 0;
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vc1_printf(10, "Framerate: %u\n", call->FrameRate);
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vc1_printf(10, "biWidth: %d\n", call->Width);
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vc1_printf(10, "biHeight: %d\n", call->Height);
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crazyFramerate = ((10000000.0 / call->FrameRate) * 1000.0);
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vc1_printf(10, "crazyFramerate: %u\n", crazyFramerate);
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{
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PesPtr = &PesPacket[PES_MIN_HEADER_SIZE];
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memcpy (PesPtr, SequenceLayerStartCode, sizeof(SequenceLayerStartCode));
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PesPtr += sizeof(SequenceLayerStartCode);
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memcpy (PesPtr, Metadata, sizeof(Metadata));
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PesPtr += METADATA_STRUCT_C_START;
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//
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PesPtr += WMV3_PRIVATE_DATA_LENGTH;
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/* Metadata Header Struct A */
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*PesPtr++ = (call->Height >> 0) & 0xff;
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*PesPtr++ = (call->Height >> 8) & 0xff;
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*PesPtr++ = (call->Height >> 16) & 0xff;
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*PesPtr++ = call->Height >> 24;
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*PesPtr++ = (call->Width >> 0) & 0xff;
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*PesPtr++ = (call->Width >> 8) & 0xff;
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*PesPtr++ = (call->Width >> 16) & 0xff;
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*PesPtr++ = call->Width >> 24;
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PesPtr += 12; /* Skip flag word and Struct B first 8 bytes */
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*PesPtr++ = (crazyFramerate >> 0) & 0xff;
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*PesPtr++ = (crazyFramerate >> 8) & 0xff;
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*PesPtr++ = (crazyFramerate >> 16) & 0xff;
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*PesPtr++ = crazyFramerate >> 24;
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MetadataLength = PesPtr - &PesPacket[PES_MIN_HEADER_SIZE];
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int HeaderLength = InsertPesHeader (PesPacket, MetadataLength, VC1_VIDEO_PES_START_CODE, INVALID_PTS_VALUE, 0);
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len = write(call->fd, PesPacket, HeaderLength + MetadataLength);
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}
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{
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unsigned int i;
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/* For VC1 the codec private data is a standard vc1 sequence header so we just copy it to the output */
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memcpy (&PesPacket[PES_MIN_HEADER_SIZE], call->private_data, call->private_size);
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vc1_printf(10, "Private Data:\n");
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for (i = 0; i < call->private_size; i++)
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vc1_printf(10, "%02x ", PesPacket[PES_MIN_HEADER_SIZE+i]);
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vc1_printf(10, "\n");
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int HeaderLength = InsertPesHeader (PesPacket, call->private_size, VC1_VIDEO_PES_START_CODE, INVALID_PTS_VALUE, 0);
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len = write(call->fd, PesPacket, call->private_size + HeaderLength);
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}
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initialHeader = 0;
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}
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if(call->len > 0 && call->data) {
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unsigned int Position = 0;
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unsigned char insertSampleHeader = 1;
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while(Position < call->len) {
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int PacketLength = (call->len - Position) <= MAX_PES_PACKET_SIZE ?
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(call->len - Position) : MAX_PES_PACKET_SIZE;
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int Remaining = call->len - Position - PacketLength;
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vc1_printf(20, "PacketLength=%d, Remaining=%d, Position=%d\n", PacketLength, Remaining, Position);
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unsigned char PesHeader[PES_MAX_HEADER_SIZE];
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memset (PesHeader, '0', PES_MAX_HEADER_SIZE);
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int HeaderLength = InsertPesHeader (PesHeader, PacketLength, VC1_VIDEO_PES_START_CODE, call->Pts, 0);
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if(insertSampleHeader) {
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const unsigned char Vc1FrameStartCode[] = {0, 0, 1, VC1_FRAME_START_CODE};
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/*
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vc1_printf(10, "Data Start: {00 00 01 0d} - ");
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int i;
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for (i = 0; i < 4; i++) vc1_printf(10, "%02x ", call->data[i]);
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vc1_printf(10, "\n");
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*/
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if (!FrameHeaderSeen && (call->len > 3) && (memcmp (call->data, Vc1FrameStartCode, 4) == 0))
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FrameHeaderSeen = 1;
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if (!FrameHeaderSeen)
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{
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memcpy (&PesHeader[HeaderLength], Vc1FrameStartCode, sizeof(Vc1FrameStartCode));
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HeaderLength += sizeof(Vc1FrameStartCode);
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}
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insertSampleHeader = 0;
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}
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struct iovec iov[2];
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iov[0].iov_base = PesHeader;
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iov[0].iov_len = HeaderLength;
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iov[1].iov_base = call->data + Position;
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iov[1].iov_len = PacketLength;
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ssize_t l = writev(call->fd, iov, 2);
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if (l < 0) {
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len = l;
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break;
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}
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len += l;
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Position += PacketLength;
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call->Pts = INVALID_PTS_VALUE;
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}
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}
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vc1_printf(10, "< %d\n", len);
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return len;
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}
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/* ***************************** */
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/* Writer Definition */
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/* ***************************** */
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static WriterCaps_t caps = {
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"vc1",
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eVideo,
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"V_VC1",
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VIDEO_ENCODING_VC1
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};
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struct Writer_s WriterVideoVC1 = {
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&reset,
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&writeData,
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NULL,
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&caps
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};
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