/* * ASF muxer * Copyright (c) 2000, 2001 Fabrice Bellard * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avformat.h" #include "riff.h" #include "asf.h" #include "avio_internal.h" #include "libavutil/dict.h" #undef NDEBUG #include <assert.h> #define ASF_INDEXED_INTERVAL 10000000 #define ASF_INDEX_BLOCK 600 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2 #define ASF_PACKET_ERROR_CORRECTION_FLAGS (\ ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \ ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\ ) #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0) # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1 #else # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0 #endif #define ASF_PPI_PROPERTY_FLAGS (\ ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \ ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \ ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \ ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \ ) #define ASF_PPI_LENGTH_TYPE_FLAGS 0 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) # define ASF_PPI_SEQUENCE_FIELD_SIZE 1 #endif #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) # define ASF_PPI_SEQUENCE_FIELD_SIZE 2 #endif #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) # define ASF_PPI_SEQUENCE_FIELD_SIZE 4 #endif #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE # define ASF_PPI_SEQUENCE_FIELD_SIZE 0 #endif #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1 #endif #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2 #endif #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4 #endif #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0 #endif #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1 #endif #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2 #endif #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4 #endif #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0 #endif #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1 #endif #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2 #endif #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4 #endif #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0 #endif #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)) # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1 #endif #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)) # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2 #endif #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)) # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4 #endif #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0 #endif #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1 #endif #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2 #endif #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4 #endif #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0 #endif #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1 #endif #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE)) # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2 #endif #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0 #endif #define PACKET_HEADER_MIN_SIZE (\ ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \ ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \ 1 + /*Length Type Flags*/ \ 1 + /*Property Flags*/ \ ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \ ASF_PPI_SEQUENCE_FIELD_SIZE + \ ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \ 4 + /*Send Time Field*/ \ 2 /*Duration Field*/ \ ) // Replicated Data shall be at least 8 bytes long. #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\ 1 + /*Stream Number*/ \ ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \ ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \ ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \ ASF_PAYLOAD_REPLICATED_DATA_LENGTH \ ) #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\ 1 + /*Stream Number*/ \ ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \ ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \ ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \ ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \ ASF_PAYLOAD_LENGTH_FIELD_SIZE \ ) #define SINGLE_PAYLOAD_DATA_LENGTH (\ PACKET_SIZE - \ PACKET_HEADER_MIN_SIZE - \ PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \ ) #define MULTI_PAYLOAD_CONSTANT (\ PACKET_SIZE - \ PACKET_HEADER_MIN_SIZE - \ 1 - /*Payload Flags*/ \ 2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \ ) typedef struct { uint32_t seqno; int is_streamed; ASFStream streams[128]; ///< it's max number and it's not that big /* non streamed additonnal info */ uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting int64_t duration; ///< in 100ns units /* packet filling */ unsigned char multi_payloads_present; int packet_size_left; int packet_timestamp_start; int packet_timestamp_end; unsigned int packet_nb_payloads; uint8_t packet_buf[PACKET_SIZE]; AVIOContext pb; /* only for reading */ uint64_t data_offset; ///< beginning of the first data packet int64_t last_indexed_pts; ASFIndex* index_ptr; uint32_t nb_index_count; uint32_t nb_index_memory_alloc; uint16_t maximum_packet; } ASFContext; static const AVCodecTag codec_asf_bmp_tags[] = { { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') }, { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') }, { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, { CODEC_ID_NONE, 0 }, }; #define PREROLL_TIME 3100 static void put_guid(AVIOContext *s, const ff_asf_guid *g) { assert(sizeof(*g) == 16); avio_write(s, *g, sizeof(*g)); } static void put_str16(AVIOContext *s, const char *tag) { int len; uint8_t *pb; AVIOContext *dyn_buf; if (avio_open_dyn_buf(&dyn_buf) < 0) return; avio_put_str16le(dyn_buf, tag); len = avio_close_dyn_buf(dyn_buf, &pb); avio_wl16(s, len); avio_write(s, pb, len); av_freep(&pb); } static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g) { int64_t pos; pos = avio_tell(pb); put_guid(pb, g); avio_wl64(pb, 24); return pos; } /* update header size */ static void end_header(AVIOContext *pb, int64_t pos) { int64_t pos1; pos1 = avio_tell(pb); avio_seek(pb, pos + 16, SEEK_SET); avio_wl64(pb, pos1 - pos); avio_seek(pb, pos1, SEEK_SET); } /* write an asf chunk (only used in streaming case) */ static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; int length; length = payload_length + 8; avio_wl16(pb, type); avio_wl16(pb, length); //size avio_wl32(pb, asf->seqno);//sequence number avio_wl16(pb, flags); /* unknown bytes */ avio_wl16(pb, length); //size_confirm asf->seqno++; } /* convert from unix to windows time */ static int64_t unix_to_file_time(int ti) { int64_t t; t = ti * INT64_C(10000000); t += INT64_C(116444736000000000); return t; } /* write the header (used two times if non streamed) */ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; AVDictionaryEntry *tags[5]; int header_size, n, extra_size, extra_size2, wav_extra_size, file_time; int has_title; int metadata_count; AVCodecContext *enc; int64_t header_offset, cur_pos, hpos; int bit_rate; int64_t duration; ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL); tags[0] = av_dict_get(s->metadata, "title" , NULL, 0); tags[1] = av_dict_get(s->metadata, "author" , NULL, 0); tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0); tags[3] = av_dict_get(s->metadata, "comment" , NULL, 0); tags[4] = av_dict_get(s->metadata, "rating" , NULL, 0); duration = asf->duration + PREROLL_TIME * 10000; has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4]; metadata_count = s->metadata ? s->metadata->count : 0; bit_rate = 0; for(n=0;n<s->nb_streams;n++) { enc = s->streams[n]->codec; av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */ bit_rate += enc->bit_rate; } if (asf->is_streamed) { put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */ } put_guid(pb, &ff_asf_header); avio_wl64(pb, -1); /* header length, will be patched after */ avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 2); /* ??? */ /* file header */ header_offset = avio_tell(pb); hpos = put_header(pb, &ff_asf_file_header); put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, file_size); file_time = 0; avio_wl64(pb, unix_to_file_time(file_time)); avio_wl64(pb, asf->nb_packets); /* number of packets */ avio_wl64(pb, duration); /* end time stamp (in 100ns units) */ avio_wl64(pb, asf->duration); /* duration (in 100ns units) */ avio_wl64(pb, PREROLL_TIME); /* start time stamp */ avio_wl32(pb, (asf->is_streamed || !pb->seekable ) ? 3 : 2); /* ??? */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, s->packet_size); /* packet size */ avio_wl32(pb, bit_rate); /* Nominal data rate in bps */ end_header(pb, hpos); /* unknown headers */ hpos = put_header(pb, &ff_asf_head1_guid); put_guid(pb, &ff_asf_head2_guid); avio_wl32(pb, 6); avio_wl16(pb, 0); end_header(pb, hpos); /* title and other infos */ if (has_title) { int len; uint8_t *buf; AVIOContext *dyn_buf; if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); hpos = put_header(pb, &ff_asf_comment_header); for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) { len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0; avio_wl16(pb, len); } len = avio_close_dyn_buf(dyn_buf, &buf); avio_write(pb, buf, len); av_freep(&buf); end_header(pb, hpos); } if (metadata_count) { AVDictionaryEntry *tag = NULL; hpos = put_header(pb, &ff_asf_extended_content_header); avio_wl16(pb, metadata_count); while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) { put_str16(pb, tag->key); avio_wl16(pb, 0); put_str16(pb, tag->value); } end_header(pb, hpos); } /* stream headers */ for(n=0;n<s->nb_streams;n++) { int64_t es_pos; // ASFStream *stream = &asf->streams[n]; enc = s->streams[n]->codec; asf->streams[n].num = n + 1; asf->streams[n].seq = 0; switch(enc->codec_type) { case AVMEDIA_TYPE_AUDIO: wav_extra_size = 0; extra_size = 18 + wav_extra_size; extra_size2 = 8; break; default: case AVMEDIA_TYPE_VIDEO: wav_extra_size = enc->extradata_size; extra_size = 0x33 + wav_extra_size; extra_size2 = 0; break; } hpos = put_header(pb, &ff_asf_stream_header); if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { put_guid(pb, &ff_asf_audio_stream); put_guid(pb, &ff_asf_audio_conceal_spread); } else { put_guid(pb, &ff_asf_video_stream); put_guid(pb, &ff_asf_video_conceal_none); } avio_wl64(pb, 0); /* ??? */ es_pos = avio_tell(pb); avio_wl32(pb, extra_size); /* wav header len */ avio_wl32(pb, extra_size2); /* additional data len */ avio_wl16(pb, n + 1); /* stream number */ avio_wl32(pb, 0); /* ??? */ if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { /* WAVEFORMATEX header */ int wavsize = ff_put_wav_header(pb, enc); 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)) { wavsize += 2; avio_wl16(pb, 0); } if (wavsize < 0) return -1; if (wavsize != extra_size) { cur_pos = avio_tell(pb); avio_seek(pb, es_pos, SEEK_SET); avio_wl32(pb, wavsize); /* wav header len */ avio_seek(pb, cur_pos, SEEK_SET); } /* ERROR Correction */ avio_w8(pb, 0x01); if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){ avio_wl16(pb, 0x0190); avio_wl16(pb, 0x0190); }else{ avio_wl16(pb, enc->block_align); avio_wl16(pb, enc->block_align); } avio_wl16(pb, 0x01); avio_w8(pb, 0x00); } else { avio_wl32(pb, enc->width); avio_wl32(pb, enc->height); avio_w8(pb, 2); /* ??? */ avio_wl16(pb, 40 + enc->extradata_size); /* size */ /* BITMAPINFOHEADER header */ ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1); } end_header(pb, hpos); } /* media comments */ hpos = put_header(pb, &ff_asf_codec_comment_header); put_guid(pb, &ff_asf_codec_comment1_header); avio_wl32(pb, s->nb_streams); for(n=0;n<s->nb_streams;n++) { AVCodec *p; const char *desc; int len; uint8_t *buf; AVIOContext *dyn_buf; enc = s->streams[n]->codec; p = avcodec_find_encoder(enc->codec_id); if(enc->codec_type == AVMEDIA_TYPE_AUDIO) avio_wl16(pb, 2); else if(enc->codec_type == AVMEDIA_TYPE_VIDEO) avio_wl16(pb, 1); else avio_wl16(pb, -1); if(enc->codec_id == CODEC_ID_WMAV2) desc = "Windows Media Audio V8"; else desc = p ? p->name : enc->codec_name; if ( avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); avio_put_str16le(dyn_buf, desc); len = avio_close_dyn_buf(dyn_buf, &buf); avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2 avio_write(pb, buf, len); av_freep(&buf); avio_wl16(pb, 0); /* no parameters */ /* id */ if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { avio_wl16(pb, 2); avio_wl16(pb, enc->codec_tag); } else { avio_wl16(pb, 4); avio_wl32(pb, enc->codec_tag); } if(!enc->codec_tag) return -1; } end_header(pb, hpos); /* patch the header size fields */ cur_pos = avio_tell(pb); header_size = cur_pos - header_offset; if (asf->is_streamed) { header_size += 8 + 30 + 50; avio_seek(pb, header_offset - 10 - 30, SEEK_SET); avio_wl16(pb, header_size); avio_seek(pb, header_offset - 2 - 30, SEEK_SET); avio_wl16(pb, header_size); header_size -= 8 + 30 + 50; } header_size += 24 + 6; avio_seek(pb, header_offset - 14, SEEK_SET); avio_wl64(pb, header_size); avio_seek(pb, cur_pos, SEEK_SET); /* movie chunk, followed by packets of packet_size */ asf->data_offset = cur_pos; put_guid(pb, &ff_asf_data_header); avio_wl64(pb, data_chunk_size); put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, asf->nb_packets); /* nb packets */ avio_w8(pb, 1); /* ??? */ avio_w8(pb, 1); /* ??? */ return 0; } static int asf_write_header(AVFormatContext *s) { ASFContext *asf = s->priv_data; s->packet_size = PACKET_SIZE; asf->nb_packets = 0; asf->last_indexed_pts = 0; asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK ); asf->nb_index_memory_alloc = ASF_INDEX_BLOCK; asf->nb_index_count = 0; asf->maximum_packet = 0; /* the data-chunk-size has to be 50, which is data_size - asf->data_offset * at the moment this function is done. It is needed to use asf as * streamable format. */ if (asf_write_header1(s, 0, 50) < 0) { //av_free(asf); return -1; } avio_flush(s->pb); asf->packet_nb_payloads = 0; asf->packet_timestamp_start = -1; asf->packet_timestamp_end = -1; ffio_init_context(&asf->pb, asf->packet_buf, s->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; AVIOContext *pb = s->pb; int ppi_size, i; int64_t start= avio_tell(pb); int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS; padsize -= PACKET_HEADER_MIN_SIZE; if(asf->multi_payloads_present) padsize--; assert(padsize>=0); avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS); for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){ avio_w8(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; } avio_w8(pb, iLengthTypeFlags); avio_w8(pb, ASF_PPI_PROPERTY_FLAGS); if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD) avio_wl16(pb, padsize - 2); if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE) avio_w8(pb, padsize - 1); avio_wl32(pb, sendtime); avio_wl16(pb, duration); if (asf->multi_payloads_present) avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS); ppi_size = avio_tell(pb) - start; return ppi_size; } static void flush_packet(AVFormatContext *s) { ASFContext *asf = s->priv_data; int packet_hdr_size, packet_filled_size; assert(asf->packet_timestamp_end >= asf->packet_timestamp_start); if (asf->is_streamed) { put_chunk(s, 0x4424, s->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); avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size); avio_flush(s->pb); asf->nb_packets++; asf->packet_nb_payloads = 0; asf->packet_timestamp_start = -1; asf->packet_timestamp_end = -1; ffio_init_context(&asf->pb, asf->packet_buf, s->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; AVIOContext *pb = &asf->pb; int val; val = stream->num; if (flags & AV_PKT_FLAG_KEY) val |= ASF_PL_FLAG_KEY_FRAME; avio_w8(pb, val); avio_w8(pb, stream->seq); //Media object number avio_wl32(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. avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH); avio_wl32(pb, m_obj_size); //Replicated Data - Media Object Size avio_wl32(pb, presentation_time);//Replicated Data - Presentation Time if (asf->multi_payloads_present){ avio_wl16(pb, payload_len); //payload length } } static void put_frame( AVFormatContext *s, ASFStream *stream, AVStream *avst, 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; if(frag_len1 < payload_len && avst->codec->codec_type == AVMEDIA_TYPE_AUDIO){ flush_packet(s); continue; } } 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); avio_write(&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; int flags= pkt->flags; codec = s->streams[pkt->stream_index]->codec; stream = &asf->streams[pkt->stream_index]; if(codec->codec_type == AVMEDIA_TYPE_AUDIO) flags &= ~AV_PKT_FLAG_KEY; pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts; assert(pts != AV_NOPTS_VALUE); duration = pts * 10000; asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000); packet_st = asf->nb_packets; put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags); /* check index */ if ((!asf->is_streamed) && (flags & AV_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) { AVIOContext *pb = s->pb; int i; put_guid(pb, &ff_asf_simple_index_header); avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count); put_guid(pb, &ff_asf_my_guid); avio_wl64(pb, ASF_INDEXED_INTERVAL); avio_wl32(pb, max); avio_wl32(pb, count); for(i=0; i<count; i++) { avio_wl32(pb, index[i].packet_number); avio_wl16(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 = avio_tell(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); } avio_flush(s->pb); if (asf->is_streamed || !s->pb->seekable) { put_chunk(s, 0x4524, 0, 0); /* end of stream */ } else { /* rewrite an updated header */ file_size = avio_tell(s->pb); avio_seek(s->pb, 0, SEEK_SET); asf_write_header1(s, file_size, data_size - asf->data_offset); } avio_flush(s->pb); av_free(asf->index_ptr); return 0; } #if CONFIG_ASF_MUXER AVOutputFormat ff_asf_muxer = { "asf", NULL_IF_CONFIG_SMALL("ASF format"), "video/x-ms-asf", "asf,wmv,wma", sizeof(ASFContext), #if 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* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0}, }; #endif #if CONFIG_ASF_STREAM_MUXER AVOutputFormat ff_asf_stream_muxer = { "asf_stream", NULL_IF_CONFIG_SMALL("ASF format"), "video/x-ms-asf", "asf,wmv,wma", sizeof(ASFContext), #if 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* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0}, }; #endif //CONFIG_ASF_STREAM_MUXER