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842 lines
28 KiB
842 lines
28 KiB
/* |
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* Adaptive stream format muxer |
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* Copyright (c) 2000, 2001 Fabrice Bellard. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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#include "riff.h" |
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#include "asf.h" |
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#undef NDEBUG |
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#include <assert.h> |
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#define ASF_INDEXED_INTERVAL 10000000 |
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#define ASF_INDEX_BLOCK 600 |
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#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2 |
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#define ASF_PACKET_ERROR_CORRECTION_FLAGS (\ |
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ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \ |
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ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\ |
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) |
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#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0) |
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# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1 |
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#else |
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# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0 |
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#endif |
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#define ASF_PPI_PROPERTY_FLAGS (\ |
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ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \ |
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ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \ |
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ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \ |
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ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \ |
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) |
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#define ASF_PPI_LENGTH_TYPE_FLAGS 0 |
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#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD |
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#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) |
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# define ASF_PPI_SEQUENCE_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) |
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# define ASF_PPI_SEQUENCE_FIELD_SIZE 2 |
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#endif |
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#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) |
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# define ASF_PPI_SEQUENCE_FIELD_SIZE 4 |
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#endif |
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#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE |
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# define ASF_PPI_SEQUENCE_FIELD_SIZE 0 |
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#endif |
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#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) |
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# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) |
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# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2 |
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#endif |
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#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) |
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# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4 |
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#endif |
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#ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE |
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# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0 |
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#endif |
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#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) |
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# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) |
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# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2 |
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#endif |
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#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) |
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# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4 |
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#endif |
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#ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE |
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# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0 |
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#endif |
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#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2 |
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#endif |
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#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4 |
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#endif |
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#ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE |
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# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0 |
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#endif |
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#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2 |
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#endif |
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#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4 |
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#endif |
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#ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE |
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# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0 |
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#endif |
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#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2 |
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#endif |
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#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4 |
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#endif |
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#ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE |
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# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0 |
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#endif |
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#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1 |
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#endif |
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#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE)) |
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# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2 |
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#endif |
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#ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE |
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# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0 |
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#endif |
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#define PACKET_HEADER_MIN_SIZE (\ |
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ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \ |
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ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \ |
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1 + /*Length Type Flags*/ \ |
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1 + /*Property Flags*/ \ |
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ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \ |
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ASF_PPI_SEQUENCE_FIELD_SIZE + \ |
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ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \ |
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4 + /*Send Time Field*/ \ |
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2 /*Duration Field*/ \ |
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) |
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// Replicated Data shall be at least 8 bytes long. |
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#define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08 |
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#define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\ |
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1 + /*Stream Number*/ \ |
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ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \ |
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ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \ |
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ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \ |
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ASF_PAYLOAD_REPLICATED_DATA_LENGTH \ |
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) |
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#define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\ |
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1 + /*Stream Number*/ \ |
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ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \ |
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ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \ |
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ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \ |
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ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \ |
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ASF_PAYLOAD_LENGTH_FIELD_SIZE \ |
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) |
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#define SINGLE_PAYLOAD_DATA_LENGTH (\ |
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PACKET_SIZE - \ |
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PACKET_HEADER_MIN_SIZE - \ |
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PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \ |
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) |
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#define MULTI_PAYLOAD_CONSTANT (\ |
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PACKET_SIZE - \ |
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PACKET_HEADER_MIN_SIZE - \ |
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1 - /*Payload Flags*/ \ |
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2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \ |
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) |
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static const AVCodecTag codec_asf_bmp_tags[] = { |
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{ CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') }, |
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{ CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') }, |
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{ CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, |
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{ CODEC_ID_NONE, 0 }, |
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}; |
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static int preroll_time = 2000; |
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static const uint8_t error_spread_ADPCM_G726[] = { 0x01, 0x90, 0x01, 0x90, 0x01, 0x01, 0x00, 0x00 }; |
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static void put_guid(ByteIOContext *s, const GUID *g) |
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{ |
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assert(sizeof(*g) == 16); |
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put_buffer(s, g, sizeof(*g)); |
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} |
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static void put_str16_nolen(ByteIOContext *s, const char *tag); |
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static void put_str16(ByteIOContext *s, const char *tag) |
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{ |
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put_le16(s,strlen(tag) + 1); |
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put_str16_nolen(s, tag); |
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} |
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static void put_str16_nolen(ByteIOContext *s, const char *tag) |
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{ |
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int c; |
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do{ |
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c = (uint8_t)*tag++; |
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put_le16(s, c); |
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}while(c); |
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} |
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static int64_t put_header(ByteIOContext *pb, const GUID *g) |
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{ |
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int64_t pos; |
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pos = url_ftell(pb); |
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put_guid(pb, g); |
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put_le64(pb, 24); |
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return pos; |
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} |
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/* update header size */ |
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static void end_header(ByteIOContext *pb, int64_t pos) |
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{ |
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int64_t pos1; |
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pos1 = url_ftell(pb); |
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url_fseek(pb, pos + 16, SEEK_SET); |
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put_le64(pb, pos1 - pos); |
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url_fseek(pb, pos1, SEEK_SET); |
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} |
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/* write an asf chunk (only used in streaming case) */ |
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static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags) |
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{ |
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ASFContext *asf = s->priv_data; |
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ByteIOContext *pb = &s->pb; |
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int length; |
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length = payload_length + 8; |
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put_le16(pb, type); |
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put_le16(pb, length); //size |
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put_le32(pb, asf->seqno);//sequence number |
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put_le16(pb, flags); /* unknown bytes */ |
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put_le16(pb, length); //size_confirm |
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asf->seqno++; |
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} |
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/* convert from unix to windows time */ |
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static int64_t unix_to_file_time(int ti) |
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{ |
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int64_t t; |
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t = ti * INT64_C(10000000); |
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t += INT64_C(116444736000000000); |
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return t; |
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} |
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/* write the header (used two times if non streamed) */ |
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static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size) |
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{ |
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ASFContext *asf = s->priv_data; |
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ByteIOContext *pb = &s->pb; |
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int header_size, n, extra_size, extra_size2, wav_extra_size, file_time; |
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int has_title; |
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AVCodecContext *enc; |
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int64_t header_offset, cur_pos, hpos; |
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int bit_rate; |
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int64_t duration; |
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duration = asf->duration + preroll_time * 10000; |
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has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]); |
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bit_rate = 0; |
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for(n=0;n<s->nb_streams;n++) { |
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enc = s->streams[n]->codec; |
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av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */ |
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bit_rate += enc->bit_rate; |
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} |
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if (asf->is_streamed) { |
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put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */ |
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} |
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put_guid(pb, &asf_header); |
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put_le64(pb, -1); /* header length, will be patched after */ |
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put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */ |
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put_byte(pb, 1); /* ??? */ |
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put_byte(pb, 2); /* ??? */ |
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/* file header */ |
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header_offset = url_ftell(pb); |
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hpos = put_header(pb, &file_header); |
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put_guid(pb, &my_guid); |
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put_le64(pb, file_size); |
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file_time = 0; |
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put_le64(pb, unix_to_file_time(file_time)); |
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put_le64(pb, asf->nb_packets); /* number of packets */ |
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put_le64(pb, duration); /* end time stamp (in 100ns units) */ |
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put_le64(pb, duration); /* duration (in 100ns units) */ |
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put_le32(pb, preroll_time); /* start time stamp */ |
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put_le32(pb, 0); /* ??? */ |
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put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */ |
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put_le32(pb, asf->packet_size); /* packet size */ |
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put_le32(pb, asf->packet_size); /* packet size */ |
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put_le32(pb, bit_rate); /* Nominal data rate in bps */ |
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end_header(pb, hpos); |
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/* unknown headers */ |
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hpos = put_header(pb, &head1_guid); |
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put_guid(pb, &head2_guid); |
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put_le32(pb, 6); |
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put_le16(pb, 0); |
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end_header(pb, hpos); |
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/* title and other infos */ |
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if (has_title) { |
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hpos = put_header(pb, &comment_header); |
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if ( s->title[0] ) { put_le16(pb, 2 * (strlen(s->title ) + 1)); } else { put_le16(pb, 0); } |
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if ( s->author[0] ) { put_le16(pb, 2 * (strlen(s->author ) + 1)); } else { put_le16(pb, 0); } |
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if ( s->copyright[0] ) { put_le16(pb, 2 * (strlen(s->copyright) + 1)); } else { put_le16(pb, 0); } |
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if ( s->comment[0] ) { put_le16(pb, 2 * (strlen(s->comment ) + 1)); } else { put_le16(pb, 0); } |
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put_le16(pb, 0); |
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if ( s->title[0] ) put_str16_nolen(pb, s->title); |
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if ( s->author[0] ) put_str16_nolen(pb, s->author); |
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if ( s->copyright[0] ) put_str16_nolen(pb, s->copyright); |
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if ( s->comment[0] ) put_str16_nolen(pb, s->comment); |
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end_header(pb, hpos); |
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} |
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/* stream headers */ |
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for(n=0;n<s->nb_streams;n++) { |
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int64_t es_pos; |
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const uint8_t *er_spr = NULL; |
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int er_spr_len = 0; |
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// ASFStream *stream = &asf->streams[n]; |
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enc = s->streams[n]->codec; |
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asf->streams[n].num = n + 1; |
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asf->streams[n].seq = 0; |
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if (enc->codec_type == CODEC_TYPE_AUDIO) { |
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if (enc->codec_id == CODEC_ID_ADPCM_G726) { |
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er_spr = error_spread_ADPCM_G726; |
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er_spr_len = sizeof(error_spread_ADPCM_G726); |
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} |
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} |
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switch(enc->codec_type) { |
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case CODEC_TYPE_AUDIO: |
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wav_extra_size = 0; |
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extra_size = 18 + wav_extra_size; |
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extra_size2 = er_spr_len; |
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break; |
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default: |
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case CODEC_TYPE_VIDEO: |
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wav_extra_size = enc->extradata_size; |
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extra_size = 0x33 + wav_extra_size; |
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extra_size2 = 0; |
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break; |
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} |
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hpos = put_header(pb, &stream_header); |
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if (enc->codec_type == CODEC_TYPE_AUDIO) { |
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put_guid(pb, &audio_stream); |
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if ((er_spr != NULL) && (er_spr_len != 0)) { |
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put_guid(pb, &audio_conceal_spread); |
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} else { |
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put_guid(pb, &video_conceal_none); |
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} |
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} else { |
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put_guid(pb, &video_stream); |
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put_guid(pb, &video_conceal_none); |
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} |
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put_le64(pb, 0); /* ??? */ |
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es_pos = url_ftell(pb); |
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put_le32(pb, extra_size); /* wav header len */ |
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put_le32(pb, extra_size2); /* additional data len */ |
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put_le16(pb, n + 1); /* stream number */ |
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put_le32(pb, 0); /* ??? */ |
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if (enc->codec_type == CODEC_TYPE_AUDIO) { |
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/* WAVEFORMATEX header */ |
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int wavsize = put_wav_header(pb, enc); |
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if ((enc->codec_id != CODEC_ID_MP3) && (enc->codec_id != CODEC_ID_MP2) && (enc->codec_id != CODEC_ID_ADPCM_IMA_WAV) && (enc->extradata_size==0)) { |
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wavsize += 2; |
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put_le16(pb, 0); |
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} |
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if (wavsize < 0) |
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return -1; |
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if (wavsize != extra_size) { |
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cur_pos = url_ftell(pb); |
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url_fseek(pb, es_pos, SEEK_SET); |
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put_le32(pb, wavsize); /* wav header len */ |
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url_fseek(pb, cur_pos, SEEK_SET); |
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} |
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/* ERROR Correction */ |
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if ((er_spr != NULL) && (er_spr_len != 0)) |
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put_buffer(pb, er_spr, er_spr_len); |
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} else { |
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put_le32(pb, enc->width); |
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put_le32(pb, enc->height); |
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put_byte(pb, 2); /* ??? */ |
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put_le16(pb, 40 + enc->extradata_size); /* size */ |
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/* BITMAPINFOHEADER header */ |
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put_bmp_header(pb, enc, codec_bmp_tags, 1); |
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} |
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end_header(pb, hpos); |
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} |
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|
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/* media comments */ |
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hpos = put_header(pb, &codec_comment_header); |
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put_guid(pb, &codec_comment1_header); |
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put_le32(pb, s->nb_streams); |
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for(n=0;n<s->nb_streams;n++) { |
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AVCodec *p; |
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enc = s->streams[n]->codec; |
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p = avcodec_find_encoder(enc->codec_id); |
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put_le16(pb, asf->streams[n].num); |
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put_str16(pb, p ? p->name : enc->codec_name); |
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put_le16(pb, 0); /* no parameters */ |
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|
/* id */ |
|
if (enc->codec_type == CODEC_TYPE_AUDIO) { |
|
put_le16(pb, 2); |
|
put_le16(pb, enc->codec_tag); |
|
} else { |
|
put_le16(pb, 4); |
|
put_le32(pb, enc->codec_tag); |
|
} |
|
if(!enc->codec_tag) |
|
return -1; |
|
} |
|
end_header(pb, hpos); |
|
|
|
/* patch the header size fields */ |
|
|
|
cur_pos = url_ftell(pb); |
|
header_size = cur_pos - header_offset; |
|
if (asf->is_streamed) { |
|
header_size += 8 + 30 + 50; |
|
|
|
url_fseek(pb, header_offset - 10 - 30, SEEK_SET); |
|
put_le16(pb, header_size); |
|
url_fseek(pb, header_offset - 2 - 30, SEEK_SET); |
|
put_le16(pb, header_size); |
|
|
|
header_size -= 8 + 30 + 50; |
|
} |
|
header_size += 24 + 6; |
|
url_fseek(pb, header_offset - 14, SEEK_SET); |
|
put_le64(pb, header_size); |
|
url_fseek(pb, cur_pos, SEEK_SET); |
|
|
|
/* movie chunk, followed by packets of packet_size */ |
|
asf->data_offset = cur_pos; |
|
put_guid(pb, &data_header); |
|
put_le64(pb, data_chunk_size); |
|
put_guid(pb, &my_guid); |
|
put_le64(pb, asf->nb_packets); /* nb packets */ |
|
put_byte(pb, 1); /* ??? */ |
|
put_byte(pb, 1); /* ??? */ |
|
return 0; |
|
} |
|
|
|
static int asf_write_header(AVFormatContext *s) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
|
|
asf->packet_size = PACKET_SIZE; |
|
asf->nb_packets = 0; |
|
|
|
asf->last_indexed_pts = 0; |
|
asf->index_ptr = (ASFIndex*)av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK ); |
|
asf->nb_index_memory_alloc = ASF_INDEX_BLOCK; |
|
asf->nb_index_count = 0; |
|
asf->maximum_packet = 0; |
|
|
|
if (asf_write_header1(s, 0, 50) < 0) { |
|
//av_free(asf); |
|
return -1; |
|
} |
|
|
|
put_flush_packet(&s->pb); |
|
|
|
asf->packet_nb_payloads = 0; |
|
asf->packet_timestamp_start = -1; |
|
asf->packet_timestamp_end = -1; |
|
init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1, |
|
NULL, NULL, NULL, NULL); |
|
|
|
return 0; |
|
} |
|
|
|
static int asf_write_stream_header(AVFormatContext *s) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
|
|
asf->is_streamed = 1; |
|
|
|
return asf_write_header(s); |
|
} |
|
|
|
static int put_payload_parsing_info( |
|
AVFormatContext *s, |
|
unsigned int sendtime, |
|
unsigned int duration, |
|
int nb_payloads, |
|
int padsize |
|
) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
ByteIOContext *pb = &s->pb; |
|
int ppi_size, i; |
|
int64_t start= url_ftell(pb); |
|
|
|
int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS; |
|
|
|
padsize -= PACKET_HEADER_MIN_SIZE; |
|
if(asf->multi_payloads_present) |
|
padsize--; |
|
assert(padsize>=0); |
|
|
|
put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS); |
|
for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){ |
|
put_byte(pb, 0x0); |
|
} |
|
|
|
if (asf->multi_payloads_present) |
|
iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT; |
|
|
|
if (padsize > 0) { |
|
if (padsize < 256) |
|
iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE; |
|
else |
|
iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD; |
|
} |
|
put_byte(pb, iLengthTypeFlags); |
|
|
|
put_byte(pb, ASF_PPI_PROPERTY_FLAGS); |
|
|
|
if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD) |
|
put_le16(pb, padsize - 2); |
|
if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE) |
|
put_byte(pb, padsize - 1); |
|
|
|
put_le32(pb, sendtime); |
|
put_le16(pb, duration); |
|
if (asf->multi_payloads_present) |
|
put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS); |
|
|
|
ppi_size = url_ftell(pb) - start; |
|
|
|
return ppi_size; |
|
} |
|
|
|
static void flush_packet(AVFormatContext *s) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
int packet_hdr_size, packet_filled_size; |
|
|
|
if (asf->is_streamed) { |
|
put_chunk(s, 0x4424, asf->packet_size, 0); |
|
} |
|
|
|
packet_hdr_size = put_payload_parsing_info( |
|
s, |
|
asf->packet_timestamp_start, |
|
asf->packet_timestamp_end - asf->packet_timestamp_start, |
|
asf->packet_nb_payloads, |
|
asf->packet_size_left |
|
); |
|
|
|
packet_filled_size = PACKET_SIZE - asf->packet_size_left; |
|
assert(packet_hdr_size <= asf->packet_size_left); |
|
memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left); |
|
|
|
put_buffer(&s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size); |
|
|
|
put_flush_packet(&s->pb); |
|
asf->nb_packets++; |
|
asf->packet_nb_payloads = 0; |
|
asf->packet_timestamp_start = -1; |
|
asf->packet_timestamp_end = -1; |
|
init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1, |
|
NULL, NULL, NULL, NULL); |
|
} |
|
|
|
static void put_payload_header( |
|
AVFormatContext *s, |
|
ASFStream *stream, |
|
int presentation_time, |
|
int m_obj_size, |
|
int m_obj_offset, |
|
int payload_len, |
|
int flags |
|
) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
ByteIOContext *pb = &asf->pb; |
|
int val; |
|
|
|
val = stream->num; |
|
if (flags & PKT_FLAG_KEY) |
|
val |= ASF_PL_FLAG_KEY_FRAME; |
|
put_byte(pb, val); |
|
|
|
put_byte(pb, stream->seq); //Media object number |
|
put_le32(pb, m_obj_offset); //Offset Into Media Object |
|
|
|
// Replicated Data shall be at least 8 bytes long. |
|
// The first 4 bytes of data shall contain the |
|
// Size of the Media Object that the payload belongs to. |
|
// The next 4 bytes of data shall contain the |
|
// Presentation Time for the media object that the payload belongs to. |
|
put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH); |
|
|
|
put_le32(pb, m_obj_size); //Replicated Data - Media Object Size |
|
put_le32(pb, presentation_time);//Replicated Data - Presentation Time |
|
|
|
if (asf->multi_payloads_present){ |
|
put_le16(pb, payload_len); //payload length |
|
} |
|
} |
|
|
|
static void put_frame( |
|
AVFormatContext *s, |
|
ASFStream *stream, |
|
int timestamp, |
|
const uint8_t *buf, |
|
int m_obj_size, |
|
int flags |
|
) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
int m_obj_offset, payload_len, frag_len1; |
|
|
|
m_obj_offset = 0; |
|
while (m_obj_offset < m_obj_size) { |
|
payload_len = m_obj_size - m_obj_offset; |
|
if (asf->packet_timestamp_start == -1) { |
|
asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT); |
|
|
|
asf->packet_size_left = PACKET_SIZE; |
|
if (asf->multi_payloads_present){ |
|
frag_len1 = MULTI_PAYLOAD_CONSTANT - 1; |
|
} |
|
else { |
|
frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH; |
|
} |
|
asf->packet_timestamp_start = timestamp; |
|
} |
|
else { |
|
// multi payloads |
|
frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1; |
|
|
|
asf->packet_timestamp_start = timestamp; |
|
} |
|
if (frag_len1 > 0) { |
|
if (payload_len > frag_len1) |
|
payload_len = frag_len1; |
|
else if (payload_len == (frag_len1 - 1)) |
|
payload_len = frag_len1 - 2; //additional byte need to put padding length |
|
|
|
put_payload_header(s, stream, timestamp+preroll_time, m_obj_size, m_obj_offset, payload_len, flags); |
|
put_buffer(&asf->pb, buf, payload_len); |
|
|
|
if (asf->multi_payloads_present) |
|
asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS); |
|
else |
|
asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD); |
|
asf->packet_timestamp_end = timestamp; |
|
|
|
asf->packet_nb_payloads++; |
|
} else { |
|
payload_len = 0; |
|
} |
|
m_obj_offset += payload_len; |
|
buf += payload_len; |
|
|
|
if (!asf->multi_payloads_present) |
|
flush_packet(s); |
|
else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1)) |
|
flush_packet(s); |
|
} |
|
stream->seq++; |
|
} |
|
|
|
static int asf_write_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
ASFStream *stream; |
|
int64_t duration; |
|
AVCodecContext *codec; |
|
int64_t packet_st,pts; |
|
int start_sec,i; |
|
|
|
codec = s->streams[pkt->stream_index]->codec; |
|
stream = &asf->streams[pkt->stream_index]; |
|
|
|
//XXX /FIXME use duration from AVPacket (quick hack by) |
|
pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts; |
|
assert(pts != AV_NOPTS_VALUE); |
|
duration = pts * 10000; |
|
asf->duration= FFMAX(asf->duration, duration); |
|
|
|
packet_st = asf->nb_packets; |
|
put_frame(s, stream, pkt->dts, pkt->data, pkt->size, pkt->flags); |
|
|
|
/* check index */ |
|
if ((!asf->is_streamed) && (codec->codec_type == CODEC_TYPE_VIDEO) && (pkt->flags & PKT_FLAG_KEY)) { |
|
start_sec = (int)(duration / INT64_C(10000000)); |
|
if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) { |
|
for(i=asf->nb_index_count;i<start_sec;i++) { |
|
if (i>=asf->nb_index_memory_alloc) { |
|
asf->nb_index_memory_alloc += ASF_INDEX_BLOCK; |
|
asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc ); |
|
} |
|
// store |
|
asf->index_ptr[i].packet_number = (uint32_t)packet_st; |
|
asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets-packet_st); |
|
asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st)); |
|
} |
|
asf->nb_index_count = start_sec; |
|
asf->last_indexed_pts = duration; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
// |
|
static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count) |
|
{ |
|
ByteIOContext *pb = &s->pb; |
|
int i; |
|
|
|
put_guid(pb, &simple_index_header); |
|
put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count); |
|
put_guid(pb, &my_guid); |
|
put_le64(pb, ASF_INDEXED_INTERVAL); |
|
put_le32(pb, max); |
|
put_le32(pb, count); |
|
for(i=0; i<count; i++) { |
|
put_le32(pb, index[i].packet_number); |
|
put_le16(pb, index[i].packet_count); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int asf_write_trailer(AVFormatContext *s) |
|
{ |
|
ASFContext *asf = s->priv_data; |
|
int64_t file_size,data_size; |
|
|
|
/* flush the current packet */ |
|
if (asf->pb.buf_ptr > asf->pb.buffer) |
|
flush_packet(s); |
|
|
|
/* write index */ |
|
data_size = url_ftell(&s->pb); |
|
if ((!asf->is_streamed) && (asf->nb_index_count != 0)) { |
|
asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count); |
|
} |
|
put_flush_packet(&s->pb); |
|
|
|
if (asf->is_streamed) { |
|
put_chunk(s, 0x4524, 0, 0); /* end of stream */ |
|
} else { |
|
/* rewrite an updated header */ |
|
file_size = url_ftell(&s->pb); |
|
url_fseek(&s->pb, 0, SEEK_SET); |
|
asf_write_header1(s, file_size, data_size - asf->data_offset); |
|
} |
|
|
|
put_flush_packet(&s->pb); |
|
av_free(asf->index_ptr); |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_ASF_MUXER |
|
AVOutputFormat asf_muxer = { |
|
"asf", |
|
"asf format", |
|
"video/x-ms-asf", |
|
"asf,wmv,wma", |
|
sizeof(ASFContext), |
|
#ifdef CONFIG_LIBMP3LAME |
|
CODEC_ID_MP3, |
|
#else |
|
CODEC_ID_MP2, |
|
#endif |
|
CODEC_ID_MSMPEG4V3, |
|
asf_write_header, |
|
asf_write_packet, |
|
asf_write_trailer, |
|
.flags = AVFMT_GLOBALHEADER, |
|
.codec_tag= (const AVCodecTag*[]){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0}, |
|
}; |
|
#endif |
|
|
|
#ifdef CONFIG_ASF_STREAM_MUXER |
|
AVOutputFormat asf_stream_muxer = { |
|
"asf_stream", |
|
"asf format", |
|
"video/x-ms-asf", |
|
"asf,wmv,wma", |
|
sizeof(ASFContext), |
|
#ifdef CONFIG_LIBMP3LAME |
|
CODEC_ID_MP3, |
|
#else |
|
CODEC_ID_MP2, |
|
#endif |
|
CODEC_ID_MSMPEG4V3, |
|
asf_write_stream_header, |
|
asf_write_packet, |
|
asf_write_trailer, |
|
.flags = AVFMT_GLOBALHEADER, |
|
.codec_tag= (const AVCodecTag*[]){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0}, |
|
}; |
|
#endif //CONFIG_ASF_STREAM_MUXER
|
|
|