/* * Windows Television (WTV) muxer * Copyright (c) 2011 Zhentan Feng <spyfeng at gmail dot com> * Copyright (c) 2011 Peter Ross <pross@xvid.org> * 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 */ /** * @file * Windows Television (WTV) demuxer * @author Zhentan Feng <spyfeng at gmail dot com> */ #include "libavutil/avassert.h" #include "libavutil/mem.h" #include "avformat.h" #include "avio_internal.h" #include "internal.h" #include "mpegts.h" #include "mux.h" #include "wtv.h" #define WTV_BIGSECTOR_SIZE (1 << WTV_BIGSECTOR_BITS) #define INDEX_BASE 0x2 #define MAX_NB_INDEX 10 /* declare utf16le strings */ #define _ , 0, static const uint8_t timeline_table_0_header_events[] = {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0}; static const uint8_t table_0_header_legacy_attrib[] = {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0}; static const uint8_t table_0_redirector_legacy_attrib[] = {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'r'_'e'_'d'_'i'_'r'_'e'_'c'_'t'_'o'_'r'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0}; static const uint8_t table_0_header_time[] = {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'t'_'i'_'m'_'e', 0}; static const uint8_t legacy_attrib[] = {'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0}; #undef _ static const ff_asf_guid sub_wtv_guid = {0x8C,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; enum WtvFileIndex { WTV_TIMELINE_TABLE_0_HEADER_EVENTS = 0, WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS, WTV_TIMELINE, WTV_TABLE_0_HEADER_LEGACY_ATTRIB, WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB, WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB, WTV_TABLE_0_HEADER_TIME, WTV_TABLE_0_ENTRIES_TIME, WTV_FILES }; typedef struct { int64_t length; const void *header; int depth; int first_sector; } WtvFile; typedef struct { int64_t pos; int64_t serial; const ff_asf_guid * guid; int stream_id; } WtvChunkEntry; typedef struct { int64_t serial; int64_t value; } WtvSyncEntry; typedef struct { int64_t timeline_start_pos; WtvFile file[WTV_FILES]; int64_t serial; /**< chunk serial number */ int64_t last_chunk_pos; /**< last chunk position */ int64_t last_timestamp_pos; /**< last timestamp chunk position */ int64_t first_index_pos; /**< first index_chunk position */ WtvChunkEntry index[MAX_NB_INDEX]; int nb_index; int first_video_flag; WtvSyncEntry *st_pairs; /* (serial, timestamp) pairs */ int nb_st_pairs; WtvSyncEntry *sp_pairs; /* (serial, position) pairs */ int nb_sp_pairs; int64_t last_pts; int64_t last_serial; AVPacket thumbnail; } WtvContext; static void add_serial_pair(WtvSyncEntry ** list, int * count, int64_t serial, int64_t value) { int new_count = *count + 1; WtvSyncEntry *new_list = av_realloc_array(*list, new_count, sizeof(WtvSyncEntry)); if (!new_list) return; new_list[*count] = (WtvSyncEntry){serial, value}; *list = new_list; *count = new_count; } typedef int WTVHeaderWriteFunc(AVIOContext *pb); typedef struct { const uint8_t *header; int header_size; WTVHeaderWriteFunc *write_header; } WTVRootEntryTable; #define write_pad(pb, size) ffio_fill(pb, 0, size) /** * Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks */ static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos; ff_put_guid(pb, guid); avio_wl32(pb, 32 + length); avio_wl32(pb, stream_id); avio_wl64(pb, wctx->serial); if ((stream_id & 0x80000000) && guid != &ff_index_guid) { WtvChunkEntry *t = wctx->index + wctx->nb_index; av_assert0(wctx->nb_index < MAX_NB_INDEX); t->pos = wctx->last_chunk_pos; t->serial = wctx->serial; t->guid = guid; t->stream_id = stream_id & 0x3FFFFFFF; wctx->nb_index++; } } static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; int64_t last_chunk_pos = wctx->last_chunk_pos; write_chunk_header(s, guid, 0, stream_id); // length updated later avio_wl64(pb, last_chunk_pos); } static void finish_chunk_noindex(AVFormatContext *s) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; // update the chunk_len field and pad. int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos); avio_seek(pb, -(chunk_len - 16), SEEK_CUR); avio_wl32(pb, chunk_len); avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR); write_pad(pb, WTV_PAD8(chunk_len) - chunk_len); wctx->serial++; } static void write_index(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int i; write_chunk_header2(s, &ff_index_guid, 0x80000000); avio_wl32(pb, 0); avio_wl32(pb, 0); for (i = 0; i < wctx->nb_index; i++) { WtvChunkEntry *t = wctx->index + i; ff_put_guid(pb, t->guid); avio_wl64(pb, t->pos); avio_wl32(pb, t->stream_id); avio_wl32(pb, 0); // checksum? avio_wl64(pb, t->serial); } wctx->nb_index = 0; // reset index finish_chunk_noindex(s); if (!wctx->first_index_pos) wctx->first_index_pos = wctx->last_chunk_pos; } static void finish_chunk(AVFormatContext *s) { WtvContext *wctx = s->priv_data; finish_chunk_noindex(s); if (wctx->nb_index == MAX_NB_INDEX) write_index(s); } static void put_videoinfoheader2(AVIOContext *pb, AVStream *st) { AVRational dar = av_mul_q(st->sample_aspect_ratio, (AVRational){st->codecpar->width, st->codecpar->height}); unsigned int num, den; av_reduce(&num, &den, dar.num, dar.den, 0xFFFFFFFF); /* VIDEOINFOHEADER2 */ avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, st->codecpar->width); avio_wl32(pb, st->codecpar->height); avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, st->codecpar->bit_rate); avio_wl32(pb, 0); avio_wl64(pb, st->avg_frame_rate.num && st->avg_frame_rate.den ? INT64_C(10000000) / av_q2d(st->avg_frame_rate) : 0); avio_wl32(pb, 0); avio_wl32(pb, 0); avio_wl32(pb, num); avio_wl32(pb, den); avio_wl32(pb, 0); avio_wl32(pb, 0); ff_put_bmp_header(pb, st->codecpar, 0, 1, 0); if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) { int padding = (st->codecpar->extradata_size & 3) ? 4 - (st->codecpar->extradata_size & 3) : 0; /* MPEG2VIDEOINFO */ avio_wl32(pb, 0); avio_wl32(pb, st->codecpar->extradata_size + padding); avio_wl32(pb, -1); avio_wl32(pb, -1); avio_wl32(pb, 0); avio_write(pb, st->codecpar->extradata, st->codecpar->extradata_size); ffio_fill(pb, 0, padding); } } static int write_stream_codec_info(AVFormatContext *s, AVStream *st) { const ff_asf_guid *g, *media_type, *format_type; const AVCodecTag *tags; AVIOContext *pb = s->pb; int64_t hdr_pos_start; int hdr_size = 0; if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { g = ff_get_codec_guid(st->codecpar->codec_id, ff_video_guids); media_type = &ff_mediatype_video; format_type = st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO ? &ff_format_mpeg2_video : &ff_format_videoinfo2; tags = ff_codec_bmp_tags; } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { g = ff_get_codec_guid(st->codecpar->codec_id, ff_codec_wav_guids); media_type = &ff_mediatype_audio; format_type = &ff_format_waveformatex; tags = ff_codec_wav_tags; } else { av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codecpar->codec_type); return -1; } ff_put_guid(pb, media_type); // mediatype ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype write_pad(pb, 12); ff_put_guid(pb,&ff_format_cpfilters_processed); // format type avio_wl32(pb, 0); // size hdr_pos_start = avio_tell(pb); if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { put_videoinfoheader2(pb, st); } else { if (ff_put_wav_header(s, pb, st->codecpar, 0) < 0) format_type = &ff_format_none; } hdr_size = avio_tell(pb) - hdr_pos_start; // seek back write hdr_size avio_seek(pb, -(hdr_size + 4), SEEK_CUR); avio_wl32(pb, hdr_size + 32); avio_seek(pb, hdr_size, SEEK_CUR); if (g) { ff_put_guid(pb, g); // actual_subtype } else { int tag = ff_codec_get_tag(tags, st->codecpar->codec_id); if (!tag) { av_log(s, AV_LOG_ERROR, "unsupported codec_id (0x%x)\n", st->codecpar->codec_id); return -1; } avio_wl32(pb, tag); avio_write(pb, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12); } ff_put_guid(pb, format_type); // actual_formattype return 0; } static int write_stream_codec(AVFormatContext *s, AVStream * st) { AVIOContext *pb = s->pb; int ret; write_chunk_header2(s, &ff_stream1_guid, 0x80000000 | 0x01); avio_wl32(pb, 0x01); write_pad(pb, 4); write_pad(pb, 4); ret = write_stream_codec_info(s, st); if (ret < 0) { av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type); return -1; } finish_chunk(s); return 0; } static void write_sync(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int64_t last_chunk_pos = wctx->last_chunk_pos; write_chunk_header(s, &ff_sync_guid, 0x18, 0); avio_wl64(pb, wctx->first_index_pos); avio_wl64(pb, wctx->last_timestamp_pos); avio_wl64(pb, 0); finish_chunk(s); add_serial_pair(&wctx->sp_pairs, &wctx->nb_sp_pairs, wctx->serial, wctx->last_chunk_pos); wctx->last_chunk_pos = last_chunk_pos; } static int write_stream_data(AVFormatContext *s, AVStream *st) { AVIOContext *pb = s->pb; int ret; write_chunk_header2(s, &ff_SBE2_STREAM_DESC_EVENT, 0x80000000 | (st->index + INDEX_BASE)); avio_wl32(pb, 0x00000001); avio_wl32(pb, st->index + INDEX_BASE); //stream_id avio_wl32(pb, 0x00000001); write_pad(pb, 8); ret = write_stream_codec_info(s, st); if (ret < 0) { av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type); return -1; } finish_chunk(s); avpriv_set_pts_info(st, 64, 1, 10000000); return 0; } static int write_header(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int i, pad, ret; AVStream *st; wctx->last_chunk_pos = -1; wctx->last_timestamp_pos = -1; ff_put_guid(pb, &ff_wtv_guid); ff_put_guid(pb, &sub_wtv_guid); avio_wl32(pb, 0x01); avio_wl32(pb, 0x02); avio_wl32(pb, 1 << WTV_SECTOR_BITS); avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS); //write initial root fields avio_wl32(pb, 0); // root_size, update later write_pad(pb, 4); avio_wl32(pb, 0); // root_sector, update it later. write_pad(pb, 32); avio_wl32(pb, 0); // file ends pointer, update it later. pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb); write_pad(pb, pad); wctx->timeline_start_pos = avio_tell(pb); wctx->serial = 1; wctx->last_chunk_pos = -1; wctx->first_video_flag = 1; for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG) continue; ret = write_stream_codec(s, st); if (ret < 0) { av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codecpar->codec_type); return -1; } if (!i) write_sync(s); } for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG) continue; ret = write_stream_data(s, st); if (ret < 0) { av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codecpar->codec_type); return -1; } } if (wctx->nb_index) write_index(s); return 0; } static void write_timestamp(AVFormatContext *s, AVPacket *pkt) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; write_chunk_header(s, &ff_timestamp_guid, 56, 0x40000000 | (INDEX_BASE + pkt->stream_index)); write_pad(pb, 8); avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts); avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts); avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts); avio_wl64(pb, 0); avio_wl64(pb, par->codec_type == AVMEDIA_TYPE_VIDEO && (pkt->flags & AV_PKT_FLAG_KEY) ? 1 : 0); avio_wl64(pb, 0); wctx->last_timestamp_pos = wctx->last_chunk_pos; } static int write_packet(AVFormatContext *s, AVPacket *pkt) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; AVStream *st = s->streams[pkt->stream_index]; if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && !wctx->thumbnail.size) { av_packet_ref(&wctx->thumbnail, pkt); return 0; } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) { int ret = ff_check_h264_startcode(s, st, pkt); if (ret < 0) return ret; } /* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */ if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50) write_sync(s); /* emit 'table.0.entries.time' record every 500ms */ if (pkt->pts != AV_NOPTS_VALUE && pkt->pts - (wctx->nb_st_pairs ? wctx->st_pairs[wctx->nb_st_pairs - 1].value : 0) >= 5000000) add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts); if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) { wctx->last_pts = pkt->pts; wctx->last_serial = wctx->serial; } // write timestamp chunk write_timestamp(s, pkt); write_chunk_header(s, &ff_data_guid, pkt->size, INDEX_BASE + pkt->stream_index); avio_write(pb, pkt->data, pkt->size); write_pad(pb, WTV_PAD8(pkt->size) - pkt->size); wctx->serial++; return 0; } static int write_table0_header_events(AVIOContext *pb) { avio_wl32(pb, 0x10); write_pad(pb, 84); avio_wl64(pb, 0x32); return 96; } static int write_table0_header_legacy_attrib(AVIOContext *pb) { int pad = 0; avio_wl32(pb, 0xFFFFFFFF); write_pad(pb, 12); avio_write(pb, legacy_attrib, sizeof(legacy_attrib)); pad = WTV_PAD8(sizeof(legacy_attrib)) - sizeof(legacy_attrib); write_pad(pb, pad); write_pad(pb, 32); return 48 + WTV_PAD8(sizeof(legacy_attrib)); } static int write_table0_header_time(AVIOContext *pb) { avio_wl32(pb, 0x10); write_pad(pb, 76); avio_wl64(pb, 0x40); return 88; } static const WTVRootEntryTable wtv_root_entry_table[] = { { timeline_table_0_header_events, sizeof(timeline_table_0_header_events), write_table0_header_events}, { ff_timeline_table_0_entries_Events_le16, sizeof(ff_timeline_table_0_entries_Events_le16), NULL}, { ff_timeline_le16, sizeof(ff_timeline_le16), NULL}, { table_0_header_legacy_attrib, sizeof(table_0_header_legacy_attrib), write_table0_header_legacy_attrib}, { ff_table_0_entries_legacy_attrib_le16, sizeof(ff_table_0_entries_legacy_attrib_le16), NULL}, { table_0_redirector_legacy_attrib, sizeof(table_0_redirector_legacy_attrib), NULL}, { table_0_header_time, sizeof(table_0_header_time), write_table0_header_time}, { ff_table_0_entries_time_le16, sizeof(ff_table_0_entries_time_le16), NULL}, }; static int write_root_table(AVFormatContext *s, int64_t sector_pos) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int size, pad; int i; const WTVRootEntryTable *h = wtv_root_entry_table; for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) { WtvFile *w = &wctx->file[i]; int filename_padding = WTV_PAD8(h->header_size) - h->header_size; WTVHeaderWriteFunc *write = h->write_header; int len = 0; int64_t len_pos; ff_put_guid(pb, &ff_dir_entry_guid); len_pos = avio_tell(pb); avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later write_pad(pb, 6); avio_wl64(pb, write ? 0 : w->length);// maybe update later avio_wl32(pb, (h->header_size + filename_padding) >> 1); write_pad(pb, 4); avio_write(pb, h->header, h->header_size); write_pad(pb, filename_padding); if (write) { len = write(pb); // update length field avio_seek(pb, len_pos, SEEK_SET); avio_wl64(pb, 40 + h->header_size + filename_padding + len); avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60)); avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR); } else { avio_wl32(pb, w->first_sector); avio_wl32(pb, w->depth); } } // caculate root table size size = avio_tell(pb) - sector_pos; pad = WTV_SECTOR_SIZE- size; write_pad(pb, pad); return size; } static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift) { int i; for (i = 0; i < nb_sectors; i++) { avio_wl32(pb, start_sector + (i << shift)); } // pad left sector pointer size write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE)); } static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth) { int64_t start_sector = start_pos >> WTV_SECTOR_BITS; int shift = sector_bits - WTV_SECTOR_BITS; int64_t fat = avio_tell(s->pb); write_fat(s->pb, start_sector, nb_sectors, shift); if (depth == 2) { int64_t start_sector1 = fat >> WTV_SECTOR_BITS; int nb_sectors1 = ((nb_sectors << 2) + WTV_SECTOR_SIZE - 1) / WTV_SECTOR_SIZE; int64_t fat1 = avio_tell(s->pb); write_fat(s->pb, start_sector1, nb_sectors1, 0); return fat1; } return fat; } static void write_table_entries_events(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int i; for (i = 0; i < wctx->nb_sp_pairs; i++) { avio_wl64(pb, wctx->sp_pairs[i].serial); avio_wl64(pb, wctx->sp_pairs[i].value); } } static void write_table_entries_time(AVFormatContext *s) { AVIOContext *pb = s->pb; WtvContext *wctx = s->priv_data; int i; for (i = 0; i < wctx->nb_st_pairs; i++) { avio_wl64(pb, wctx->st_pairs[i].value); avio_wl64(pb, wctx->st_pairs[i].serial); } avio_wl64(pb, wctx->last_pts); avio_wl64(pb, wctx->last_serial); } static void write_metadata_header(AVIOContext *pb, int type, const char *key, int value_size) { ff_put_guid(pb, &ff_metadata_guid); avio_wl32(pb, type); avio_wl32(pb, value_size); avio_put_str16le(pb, key); } static int metadata_header_size(const char *key) { return 16 + 4 + 4 + strlen(key)*2 + 2; } static void write_tag_int32(AVIOContext *pb, const char *key, int value) { write_metadata_header(pb, 0, key, 4); avio_wl32(pb, value); } static void write_tag(AVIOContext *pb, const char *key, const char *value) { write_metadata_header(pb, 1, key, strlen(value)*2 + 2); avio_put_str16le(pb, value); } static int attachment_value_size(const AVPacket *pkt, const AVDictionaryEntry *e) { return strlen("image/jpeg")*2 + 2 + 1 + (e ? strlen(e->value)*2 : 0) + 2 + 4 + pkt->size; } static void write_table_entries_attrib(AVFormatContext *s) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; const AVDictionaryEntry *tag = NULL; ff_standardize_creation_time(s); //FIXME: translate special tags (e.g. WM/Bitrate) to binary representation ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL); while ((tag = av_dict_iterate(s->metadata, tag))) write_tag(pb, tag->key, tag->value); if (wctx->thumbnail.size) { AVStream *st = s->streams[wctx->thumbnail.stream_index]; tag = av_dict_get(st->metadata, "title", NULL, 0); write_metadata_header(pb, 2, "WM/Picture", attachment_value_size(&wctx->thumbnail, tag)); avio_put_str16le(pb, "image/jpeg"); avio_w8(pb, 0x10); avio_put_str16le(pb, tag ? tag->value : ""); avio_wl32(pb, wctx->thumbnail.size); avio_write(pb, wctx->thumbnail.data, wctx->thumbnail.size); write_tag_int32(pb, "WM/MediaThumbType", 2); } } static void write_table_redirector_legacy_attrib(AVFormatContext *s) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; const AVDictionaryEntry *tag = NULL; int64_t pos = 0; //FIXME: translate special tags to binary representation while ((tag = av_dict_iterate(s->metadata, tag))) { avio_wl64(pb, pos); pos += metadata_header_size(tag->key) + strlen(tag->value)*2 + 2; } if (wctx->thumbnail.size) { AVStream *st = s->streams[wctx->thumbnail.stream_index]; avio_wl64(pb, pos); pos += metadata_header_size("WM/Picture") + attachment_value_size(&wctx->thumbnail, av_dict_get(st->metadata, "title", NULL, 0)); avio_wl64(pb, pos); pos += metadata_header_size("WM/MediaThumbType") + 4; } } /** * Pad the remainder of a file * Write out fat table * @return <0 on error */ static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t start_pos) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; WtvFile *w = &wctx->file[index]; int64_t end_pos = avio_tell(pb); int sector_bits, nb_sectors, pad; av_assert0(index < WTV_FILES); w->length = (end_pos - start_pos); // determine optimal fat table depth, sector_bits, nb_sectors if (w->length <= WTV_SECTOR_SIZE) { w->depth = 0; sector_bits = WTV_SECTOR_BITS; } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) { w->depth = 1; sector_bits = WTV_SECTOR_BITS; } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) { w->depth = 1; sector_bits = WTV_BIGSECTOR_BITS; } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) { w->depth = 2; sector_bits = WTV_SECTOR_BITS; } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) { w->depth = 2; sector_bits = WTV_BIGSECTOR_BITS; } else { av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (%"PRIi64" bytes)\n", w->length); return -1; } // determine the nb_sectors nb_sectors = (int)(w->length >> sector_bits); // pad sector of timeline pad = (1 << sector_bits) - (w->length % (1 << sector_bits)); if (pad) { nb_sectors++; write_pad(pb, pad); } //write fat table if (w->depth > 0) { w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth) >> WTV_SECTOR_BITS; } else { w->first_sector = start_pos >> WTV_SECTOR_BITS; } w->length |= 1ULL<<60; if (sector_bits == WTV_SECTOR_BITS) w->length |= 1ULL<<63; return 0; } static int write_trailer(AVFormatContext *s) { WtvContext *wctx = s->priv_data; AVIOContext *pb = s->pb; int root_size; int64_t sector_pos; int64_t start_pos, file_end_pos; if (finish_file(s, WTV_TIMELINE, wctx->timeline_start_pos) < 0) return -1; start_pos = avio_tell(pb); write_table_entries_events(s); if (finish_file(s, WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS, start_pos) < 0) return -1; start_pos = avio_tell(pb); write_table_entries_attrib(s); if (finish_file(s, WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB, start_pos) < 0) return -1; start_pos = avio_tell(pb); write_table_redirector_legacy_attrib(s); if (finish_file(s, WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB, start_pos) < 0) return -1; start_pos = avio_tell(pb); write_table_entries_time(s); if (finish_file(s, WTV_TABLE_0_ENTRIES_TIME, start_pos) < 0) return -1; // write root table sector_pos = avio_tell(pb); root_size = write_root_table(s, sector_pos); file_end_pos = avio_tell(pb); // update root value avio_seek(pb, 0x30, SEEK_SET); avio_wl32(pb, root_size); avio_seek(pb, 4, SEEK_CUR); avio_wl32(pb, sector_pos >> WTV_SECTOR_BITS); avio_seek(pb, 0x5c, SEEK_SET); avio_wl32(pb, file_end_pos >> WTV_SECTOR_BITS); av_free(wctx->sp_pairs); av_free(wctx->st_pairs); av_packet_unref(&wctx->thumbnail); return 0; } const FFOutputFormat ff_wtv_muxer = { .p.name = "wtv", .p.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"), .p.extensions = "wtv", .priv_data_size = sizeof(WtvContext), .p.audio_codec = AV_CODEC_ID_AC3, .p.video_codec = AV_CODEC_ID_MPEG2VIDEO, .write_header = write_header, .write_packet = write_packet, .write_trailer = write_trailer, .p.codec_tag = ff_riff_codec_tags_list, };