/* * ASF muxer * Copyright (c) 2000, 2001 Fabrice Bellard * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/avassert.h" #include "libavutil/dict.h" #include "libavutil/mathematics.h" #include "avformat.h" #include "avio_internal.h" #include "internal.h" #include "riff.h" #include "asf.h" #undef NDEBUG #include <assert.h> #define ASF_INDEXED_INTERVAL 10000000 #define ASF_INDEX_BLOCK (1<<9) #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) #define DATA_HEADER_SIZE 50 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; int64_t packet_timestamp_start; int64_t 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 ASFIndex *index_ptr; uint32_t nb_index_memory_alloc; uint16_t maximum_packet; uint32_t next_packet_number; uint16_t next_packet_count; uint64_t next_packet_offset; int next_start_sec; int end_sec; } ASFContext; static const AVCodecTag codec_asf_bmp_tags[] = { { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') }, { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') }, { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, { AV_CODEC_ID_NONE, 0 }, }; #define PREROLL_TIME 3100 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); ff_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; } static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset) { int i; int32_t send_time = 0; *offset = asf->data_offset + DATA_HEADER_SIZE; for (i = 0; i < asf->next_start_sec; i++) { if (pres_time <= asf->index_ptr[i].send_time) break; send_time = asf->index_ptr[i].send_time; *offset = asf->index_ptr[i].offset; } return send_time / 10000; } static int asf_write_markers(AVFormatContext *s) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; int i; AVRational scale = {1, 10000000}; int64_t hpos = put_header(pb, &ff_asf_marker_header); ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value avio_wl32(pb, s->nb_chapters); // markers count avio_wl16(pb, 0); // ASF spec mandates 0 for this avio_wl16(pb, 0); // name length 0, no name given for (i = 0; i < s->nb_chapters; i++) { AVChapter *c = s->chapters[i]; AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0); int64_t pres_time = av_rescale_q(c->start, c->time_base, scale); uint64_t offset; int32_t send_time = get_send_time(asf, pres_time, &offset); int len = 0; uint8_t *buf; AVIOContext *dyn_buf; if (t) { if (avio_open_dyn_buf(&dyn_buf) < 0) return AVERROR(ENOMEM); avio_put_str16le(dyn_buf, t->value); len = avio_close_dyn_buf(dyn_buf, &buf); } avio_wl64(pb, offset); // offset of the packet with send_time avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time avio_wl16(pb, 12 + len); // entry length avio_wl32(pb, send_time); // send time avio_wl32(pb, 0); // flags, should be 0 avio_wl32(pb, len / 2); // marker desc length in WCHARS! if (t) { avio_write(pb, buf, len); // marker desc av_freep(&buf); } } end_header(pb, hpos); return 0; } /* 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 = av_dict_count(s->metadata); bit_rate = 0; for (n = 0; n < s->nb_streams; n++) { enc = s->streams[n]->codec; avpriv_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) */ } ff_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); ff_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); ff_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); } /* chapters using ASF markers */ if (!asf->is_streamed && s->nb_chapters) { int ret; if (ret = asf_write_markers(s)) return ret; } /* 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 = 1; 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) { ff_put_guid(pb, &ff_asf_audio_stream); ff_put_guid(pb, &ff_asf_audio_conceal_spread); } else { ff_put_guid(pb, &ff_asf_video_stream); ff_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 (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 == AV_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, 0); } end_header(pb, hpos); } /* media comments */ hpos = put_header(pb, &ff_asf_codec_comment_header); ff_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 == AV_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 + DATA_HEADER_SIZE; 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 + DATA_HEADER_SIZE; } 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; ff_put_guid(pb, &ff_asf_data_header); avio_wl64(pb, data_chunk_size); ff_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->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK); asf->nb_index_memory_alloc = ASF_INDEX_BLOCK; asf->maximum_packet = 0; /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is * data_size - asf->data_offset at the moment this function is done. * It is needed to use asf as a streamable format. */ if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 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); if (s->avoid_negative_ts < 0) s->avoid_negative_ts = 1; 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 sendtime, unsigned 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--; av_assert0(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; av_assert0(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; av_assert0(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, int64_t 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, (uint32_t) 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, int64_t 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 update_index(AVFormatContext *s, int start_sec, uint32_t packet_number, uint16_t packet_count, uint64_t packet_offset) { ASFContext *asf = s->priv_data; if (start_sec > asf->next_start_sec) { int i; if (!asf->next_start_sec) { asf->next_packet_number = packet_number; asf->next_packet_count = packet_count; asf->next_packet_offset = packet_offset; } if (start_sec > asf->nb_index_memory_alloc) { int err; asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1); if ((err = av_reallocp_array(&asf->index_ptr, asf->nb_index_memory_alloc, sizeof(*asf->index_ptr))) < 0) { asf->nb_index_memory_alloc = 0; return err; } } for (i = asf->next_start_sec; i < start_sec; i++) { asf->index_ptr[i].packet_number = asf->next_packet_number; asf->index_ptr[i].packet_count = asf->next_packet_count; asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000); asf->index_ptr[i].offset = asf->next_packet_offset; } } asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count); asf->next_packet_number = packet_number; asf->next_packet_count = packet_count; asf->next_packet_offset = packet_offset; asf->next_start_sec = start_sec; return 0; } static int asf_write_packet(AVFormatContext *s, AVPacket *pkt) { ASFContext *asf = s->priv_data; AVIOContext *pb = s->pb; ASFStream *stream; AVCodecContext *codec; uint32_t packet_number; int64_t pts; int start_sec; int flags = pkt->flags; int ret; uint64_t offset = avio_tell(pb); 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; av_assert0(pts != AV_NOPTS_VALUE); pts *= 10000; asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000); packet_number = asf->nb_packets; put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags); start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1) / ASF_INDEXED_INTERVAL); /* check index */ if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) { uint16_t packet_count = asf->nb_packets - packet_number; ret = update_index(s, start_sec, packet_number, packet_count, offset); if (ret < 0) return ret; } asf->end_sec = start_sec; return 0; } static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count) { AVIOContext *pb = s->pb; int i; ff_put_guid(pb, &ff_asf_simple_index_header); avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count); ff_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; int ret; /* 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->next_start_sec) { if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0) return ret; asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec); } 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); } av_freep(&asf->index_ptr); return 0; } #if CONFIG_ASF_MUXER AVOutputFormat ff_asf_muxer = { .name = "asf", .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"), .mime_type = "video/x-ms-asf", .extensions = "asf,wmv,wma", .priv_data_size = sizeof(ASFContext), .audio_codec = AV_CODEC_ID_WMAV2, .video_codec = AV_CODEC_ID_MSMPEG4V3, .write_header = asf_write_header, .write_packet = asf_write_packet, .write_trailer = 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_MUXER */ #if CONFIG_ASF_STREAM_MUXER AVOutputFormat ff_asf_stream_muxer = { .name = "asf_stream", .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"), .mime_type = "video/x-ms-asf", .extensions = "asf,wmv,wma", .priv_data_size = sizeof(ASFContext), .audio_codec = AV_CODEC_ID_WMAV2, .video_codec = AV_CODEC_ID_MSMPEG4V3, .write_header = asf_write_stream_header, .write_packet = asf_write_packet, .write_trailer = 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 */