/* * linuxdvb output/writer handling * * Copyright (C) 2010 konfetti (based on code from libeplayer2) * Copyright (C) 2014 martii (based on code from libeplayer3) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #include #include #include #include #include #include #include "misc.h" #include "pes.h" #include "writer.h" #include #define WMV3_PRIVATE_DATA_LENGTH 4 static const uint8_t Metadata[] = { 0x00, 0x00, 0x00, 0xc5, 0x04, 0x00, 0x00, 0x00, #define METADATA_STRUCT_C_START 8 0xc0, 0x00, 0x00, 0x00, /* Struct C set for for advanced profile */ #define METADATA_STRUCT_A_START 12 0x00, 0x00, 0x00, 0x00, /* Struct A */ 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, #define METADATA_STRUCT_B_START 24 0x60, 0x00, 0x00, 0x00, /* Struct B */ 0x00, 0x00, 0x00, 0x00, #define METADATA_STRUCT_B_FRAMERATE_START 32 0x00, 0x00, 0x00, 0x00 }; class WriterWMV : public Writer { private: bool initialHeader; AVStream *stream; public: bool Write(AVPacket *packet, int64_t pts); void Init(int _fd, AVStream *_stream, Player *_player); WriterWMV(); }; void WriterWMV::Init(int _fd, AVStream *_stream, Player *_player) { fd = _fd; stream = _stream; player = _player; initialHeader = true; } bool WriterWMV::Write(AVPacket *packet, int64_t pts) { if (!packet || !packet->data) return false; if (initialHeader) { #define PES_MIN_HEADER_SIZE 9 uint8_t PesPacket[PES_MIN_HEADER_SIZE + 128]; uint8_t *PesPtr; unsigned int MetadataLength; unsigned int usecPerFrame = av_rescale(AV_TIME_BASE, stream->r_frame_rate.den, stream->r_frame_rate.num); PesPtr = &PesPacket[PES_MIN_HEADER_SIZE]; memcpy(PesPtr, Metadata, sizeof(Metadata)); PesPtr += METADATA_STRUCT_C_START; uint8_t privateData[WMV3_PRIVATE_DATA_LENGTH] = { 0 }; memcpy(privateData, get_codecpar(stream)->extradata, get_codecpar(stream)->extradata_size > WMV3_PRIVATE_DATA_LENGTH ? WMV3_PRIVATE_DATA_LENGTH : get_codecpar(stream)->extradata_size); memcpy(PesPtr, privateData, WMV3_PRIVATE_DATA_LENGTH); PesPtr += WMV3_PRIVATE_DATA_LENGTH; /* Metadata Header Struct A */ *PesPtr++ = (get_codecpar(stream)->height >> 0) & 0xff; *PesPtr++ = (get_codecpar(stream)->height >> 8) & 0xff; *PesPtr++ = (get_codecpar(stream)->height >> 16) & 0xff; *PesPtr++ = get_codecpar(stream)->height >> 24; *PesPtr++ = (get_codecpar(stream)->width >> 0) & 0xff; *PesPtr++ = (get_codecpar(stream)->width >> 8) & 0xff; *PesPtr++ = (get_codecpar(stream)->width >> 16) & 0xff; *PesPtr++ = get_codecpar(stream)->width >> 24; PesPtr += 12; /* Skip flag word and Struct B first 8 bytes */ *PesPtr++ = (usecPerFrame >> 0) & 0xff; *PesPtr++ = (usecPerFrame >> 8) & 0xff; *PesPtr++ = (usecPerFrame >> 16) & 0xff; *PesPtr++ = usecPerFrame >> 24; MetadataLength = PesPtr - &PesPacket[PES_MIN_HEADER_SIZE]; int HeaderLength = InsertPesHeader(PesPacket, MetadataLength, VC1_VIDEO_PES_START_CODE, INVALID_PTS_VALUE, 0); if (write(fd, PesPacket, HeaderLength + MetadataLength) < 0) return false; initialHeader = false; } if (packet->size > 0 && packet->data) { int Position = 0; bool insertSampleHeader = true; while (Position < packet->size) { int PacketLength = std::min(packet->size - Position, MAX_PES_PACKET_SIZE); uint8_t PesHeader[PES_MAX_HEADER_SIZE] = { 0 }; int HeaderLength = InsertPesHeader(PesHeader, PacketLength, VC1_VIDEO_PES_START_CODE, pts, 0); if (insertSampleHeader) { unsigned int PesLength; unsigned int PrivateHeaderLength; PrivateHeaderLength = InsertVideoPrivateDataHeader(&PesHeader[HeaderLength], packet->size); /* Update PesLength */ PesLength = PesHeader[PES_LENGTH_BYTE_0] + (PesHeader[PES_LENGTH_BYTE_1] << 8) + PrivateHeaderLength; PesHeader[PES_LENGTH_BYTE_0] = PesLength & 0xff; PesHeader[PES_LENGTH_BYTE_1] = (PesLength >> 8) & 0xff; PesHeader[PES_HEADER_DATA_LENGTH_BYTE] += PrivateHeaderLength; PesHeader[PES_FLAGS_BYTE] |= PES_EXTENSION_DATA_PRESENT; HeaderLength += PrivateHeaderLength; insertSampleHeader = false; } uint8_t PacketStart[packet->size + HeaderLength]; memcpy(PacketStart, PesHeader, HeaderLength); memcpy(PacketStart + HeaderLength, packet->data + Position, PacketLength); if (write(fd, PacketStart, PacketLength + HeaderLength) < 0) return false; Position += PacketLength; pts = INVALID_PTS_VALUE; } } return true; } WriterWMV::WriterWMV() { Register(this, AV_CODEC_ID_WMV1, VIDEO_ENCODING_WMV); Register(this, AV_CODEC_ID_WMV2, VIDEO_ENCODING_WMV); Register(this, AV_CODEC_ID_WMV3, VIDEO_ENCODING_WMV); } static WriterWMV writer_wmv __attribute__((init_priority(300)));