mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-30 21:26:13 +02:00
847 lines
26 KiB
C
847 lines
26 KiB
C
/*
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* Windows Television (WTV) muxer
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* Copyright (c) 2011 Zhentan Feng <spyfeng at gmail dot com>
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* Copyright (c) 2011 Peter Ross <pross@xvid.org>
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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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/**
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* @file
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* Windows Television (WTV) demuxer
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* @author Zhentan Feng <spyfeng at gmail dot com>
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avassert.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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#include "mpegts.h"
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#include "wtv.h"
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#define WTV_BIGSECTOR_SIZE (1 << WTV_BIGSECTOR_BITS)
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#define INDEX_BASE 0x2
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#define MAX_NB_INDEX 10
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/* declare utf16le strings */
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#define _ , 0,
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static const uint8_t timeline_table_0_header_events[] =
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{'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};
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static const uint8_t table_0_header_legacy_attrib[] =
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{'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};
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static const uint8_t table_0_redirector_legacy_attrib[] =
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{'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};
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static const uint8_t table_0_header_time[] =
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{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'t'_'i'_'m'_'e', 0};
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static const uint8_t legacy_attrib[] =
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{'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
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#undef _
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static const ff_asf_guid sub_wtv_guid =
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{0x8C,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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enum WtvFileIndex {
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WTV_TIMELINE_TABLE_0_HEADER_EVENTS = 0,
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WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS,
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WTV_TIMELINE,
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WTV_TABLE_0_HEADER_LEGACY_ATTRIB,
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WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB,
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WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB,
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WTV_TABLE_0_HEADER_TIME,
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WTV_TABLE_0_ENTRIES_TIME,
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WTV_FILES
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};
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typedef struct {
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int64_t length;
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const void *header;
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int depth;
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int first_sector;
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} WtvFile;
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typedef struct {
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int64_t pos;
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int64_t serial;
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const ff_asf_guid * guid;
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int stream_id;
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} WtvChunkEntry;
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typedef struct {
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int64_t serial;
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int64_t value;
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} WtvSyncEntry;
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typedef struct {
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int64_t timeline_start_pos;
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WtvFile file[WTV_FILES];
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int64_t serial; /**< chunk serial number */
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int64_t last_chunk_pos; /**< last chunk position */
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int64_t last_timestamp_pos; /**< last timestamp chunk position */
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int64_t first_index_pos; /**< first index_chunk position */
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WtvChunkEntry index[MAX_NB_INDEX];
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int nb_index;
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int first_video_flag;
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WtvSyncEntry *st_pairs; /* (serial, timestamp) pairs */
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int nb_st_pairs;
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WtvSyncEntry *sp_pairs; /* (serial, position) pairs */
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int nb_sp_pairs;
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int64_t last_pts;
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int64_t last_serial;
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AVPacket thumbnail;
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} WtvContext;
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static void add_serial_pair(WtvSyncEntry ** list, int * count, int64_t serial, int64_t value)
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{
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int new_count = *count + 1;
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WtvSyncEntry *new_list = av_realloc_array(*list, new_count, sizeof(WtvSyncEntry));
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if (!new_list)
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return;
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new_list[*count] = (WtvSyncEntry){serial, value};
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*list = new_list;
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*count = new_count;
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}
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typedef int WTVHeaderWriteFunc(AVIOContext *pb);
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typedef struct {
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const uint8_t *header;
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int header_size;
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WTVHeaderWriteFunc *write_header;
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} WTVRootEntryTable;
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#define write_pad(pb, size) ffio_fill(pb, 0, size)
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/**
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* Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks
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*/
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static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id)
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{
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WtvContext *wctx = s->priv_data;
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AVIOContext *pb = s->pb;
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wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos;
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ff_put_guid(pb, guid);
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avio_wl32(pb, 32 + length);
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avio_wl32(pb, stream_id);
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avio_wl64(pb, wctx->serial);
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if ((stream_id & 0x80000000) && guid != &ff_index_guid) {
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WtvChunkEntry *t = wctx->index + wctx->nb_index;
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av_assert0(wctx->nb_index < MAX_NB_INDEX);
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t->pos = wctx->last_chunk_pos;
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t->serial = wctx->serial;
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t->guid = guid;
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t->stream_id = stream_id & 0x3FFFFFFF;
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wctx->nb_index++;
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}
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}
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static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id)
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{
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WtvContext *wctx = s->priv_data;
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AVIOContext *pb = s->pb;
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int64_t last_chunk_pos = wctx->last_chunk_pos;
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write_chunk_header(s, guid, 0, stream_id); // length updated later
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avio_wl64(pb, last_chunk_pos);
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}
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static void finish_chunk_noindex(AVFormatContext *s)
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{
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WtvContext *wctx = s->priv_data;
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AVIOContext *pb = s->pb;
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// update the chunk_len field and pad.
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int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos);
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avio_seek(pb, -(chunk_len - 16), SEEK_CUR);
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avio_wl32(pb, chunk_len);
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avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR);
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write_pad(pb, WTV_PAD8(chunk_len) - chunk_len);
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wctx->serial++;
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}
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static void write_index(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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WtvContext *wctx = s->priv_data;
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int i;
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write_chunk_header2(s, &ff_index_guid, 0x80000000);
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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for (i = 0; i < wctx->nb_index; i++) {
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WtvChunkEntry *t = wctx->index + i;
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ff_put_guid(pb, t->guid);
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avio_wl64(pb, t->pos);
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avio_wl32(pb, t->stream_id);
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avio_wl32(pb, 0); // checksum?
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avio_wl64(pb, t->serial);
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}
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wctx->nb_index = 0; // reset index
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finish_chunk_noindex(s);
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if (!wctx->first_index_pos)
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wctx->first_index_pos = wctx->last_chunk_pos;
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}
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static void finish_chunk(AVFormatContext *s)
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{
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WtvContext *wctx = s->priv_data;
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finish_chunk_noindex(s);
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if (wctx->nb_index == MAX_NB_INDEX)
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write_index(s);
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}
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static void put_videoinfoheader2(AVIOContext *pb, AVStream *st)
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{
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AVRational dar = av_mul_q(st->sample_aspect_ratio, (AVRational){st->codecpar->width, st->codecpar->height});
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unsigned int num, den;
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av_reduce(&num, &den, dar.num, dar.den, 0xFFFFFFFF);
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/* VIDEOINFOHEADER2 */
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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avio_wl32(pb, st->codecpar->width);
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avio_wl32(pb, st->codecpar->height);
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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avio_wl32(pb, st->codecpar->bit_rate);
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avio_wl32(pb, 0);
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avio_wl64(pb, st->avg_frame_rate.num && st->avg_frame_rate.den ? INT64_C(10000000) / av_q2d(st->avg_frame_rate) : 0);
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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avio_wl32(pb, num);
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avio_wl32(pb, den);
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avio_wl32(pb, 0);
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avio_wl32(pb, 0);
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ff_put_bmp_header(pb, st->codecpar, 0, 1);
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if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
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int padding = (st->codecpar->extradata_size & 3) ? 4 - (st->codecpar->extradata_size & 3) : 0;
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/* MPEG2VIDEOINFO */
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avio_wl32(pb, 0);
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avio_wl32(pb, st->codecpar->extradata_size + padding);
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avio_wl32(pb, -1);
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avio_wl32(pb, -1);
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avio_wl32(pb, 0);
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avio_write(pb, st->codecpar->extradata, st->codecpar->extradata_size);
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ffio_fill(pb, 0, padding);
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}
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}
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static int write_stream_codec_info(AVFormatContext *s, AVStream *st)
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{
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const ff_asf_guid *g, *media_type, *format_type;
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const AVCodecTag *tags;
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AVIOContext *pb = s->pb;
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int64_t hdr_pos_start;
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int hdr_size = 0;
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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g = ff_get_codec_guid(st->codecpar->codec_id, ff_video_guids);
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media_type = &ff_mediatype_video;
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format_type = st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO ? &ff_format_mpeg2_video : &ff_format_videoinfo2;
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tags = ff_codec_bmp_tags;
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} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
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g = ff_get_codec_guid(st->codecpar->codec_id, ff_codec_wav_guids);
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media_type = &ff_mediatype_audio;
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format_type = &ff_format_waveformatex;
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tags = ff_codec_wav_tags;
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} else {
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av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codecpar->codec_type);
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return -1;
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}
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ff_put_guid(pb, media_type); // mediatype
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ff_put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype
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write_pad(pb, 12);
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ff_put_guid(pb,&ff_format_cpfilters_processed); // format type
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avio_wl32(pb, 0); // size
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hdr_pos_start = avio_tell(pb);
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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put_videoinfoheader2(pb, st);
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} else {
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if (ff_put_wav_header(s, pb, st->codecpar, 0) < 0)
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format_type = &ff_format_none;
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}
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hdr_size = avio_tell(pb) - hdr_pos_start;
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// seek back write hdr_size
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avio_seek(pb, -(hdr_size + 4), SEEK_CUR);
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avio_wl32(pb, hdr_size + 32);
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avio_seek(pb, hdr_size, SEEK_CUR);
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if (g) {
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ff_put_guid(pb, g); // actual_subtype
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} else {
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int tag = ff_codec_get_tag(tags, st->codecpar->codec_id);
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if (!tag) {
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av_log(s, AV_LOG_ERROR, "unsupported codec_id (0x%x)\n", st->codecpar->codec_id);
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return -1;
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}
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avio_wl32(pb, tag);
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avio_write(pb, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12);
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}
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ff_put_guid(pb, format_type); // actual_formattype
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return 0;
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}
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static int write_stream_codec(AVFormatContext *s, AVStream * st)
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{
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AVIOContext *pb = s->pb;
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int ret;
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write_chunk_header2(s, &ff_stream1_guid, 0x80000000 | 0x01);
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avio_wl32(pb, 0x01);
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write_pad(pb, 4);
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write_pad(pb, 4);
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ret = write_stream_codec_info(s, st);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
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return -1;
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}
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finish_chunk(s);
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return 0;
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}
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static void write_sync(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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WtvContext *wctx = s->priv_data;
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int64_t last_chunk_pos = wctx->last_chunk_pos;
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write_chunk_header(s, &ff_sync_guid, 0x18, 0);
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avio_wl64(pb, wctx->first_index_pos);
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avio_wl64(pb, wctx->last_timestamp_pos);
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avio_wl64(pb, 0);
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finish_chunk(s);
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add_serial_pair(&wctx->sp_pairs, &wctx->nb_sp_pairs, wctx->serial, wctx->last_chunk_pos);
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wctx->last_chunk_pos = last_chunk_pos;
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}
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static int write_stream_data(AVFormatContext *s, AVStream *st)
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{
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AVIOContext *pb = s->pb;
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int ret;
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write_chunk_header2(s, &ff_SBE2_STREAM_DESC_EVENT, 0x80000000 | (st->index + INDEX_BASE));
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avio_wl32(pb, 0x00000001);
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avio_wl32(pb, st->index + INDEX_BASE); //stream_id
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avio_wl32(pb, 0x00000001);
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write_pad(pb, 8);
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ret = write_stream_codec_info(s, st);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
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return -1;
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}
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finish_chunk(s);
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avpriv_set_pts_info(st, 64, 1, 10000000);
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return 0;
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}
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static int write_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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WtvContext *wctx = s->priv_data;
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int i, pad, ret;
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AVStream *st;
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wctx->last_chunk_pos = -1;
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wctx->last_timestamp_pos = -1;
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ff_put_guid(pb, &ff_wtv_guid);
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ff_put_guid(pb, &sub_wtv_guid);
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avio_wl32(pb, 0x01);
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avio_wl32(pb, 0x02);
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avio_wl32(pb, 1 << WTV_SECTOR_BITS);
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avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS);
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//write initial root fields
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avio_wl32(pb, 0); // root_size, update later
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write_pad(pb, 4);
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avio_wl32(pb, 0); // root_sector, update it later.
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write_pad(pb, 32);
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avio_wl32(pb, 0); // file ends pointer, update it later.
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pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb);
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write_pad(pb, pad);
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wctx->timeline_start_pos = avio_tell(pb);
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wctx->serial = 1;
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wctx->last_chunk_pos = -1;
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wctx->first_video_flag = 1;
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for (i = 0; i < s->nb_streams; i++) {
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st = s->streams[i];
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if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
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continue;
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ret = write_stream_codec(s, st);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codecpar->codec_type);
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return -1;
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}
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if (!i)
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write_sync(s);
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}
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for (i = 0; i < s->nb_streams; i++) {
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st = s->streams[i];
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if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
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continue;
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ret = write_stream_data(s, st);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codecpar->codec_type);
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return -1;
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}
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}
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if (wctx->nb_index)
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write_index(s);
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return 0;
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}
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static void write_timestamp(AVFormatContext *s, AVPacket *pkt)
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{
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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;
|
|
AVDictionaryEntry *tag = 0;
|
|
|
|
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_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
|
|
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;
|
|
AVDictionaryEntry *tag = 0;
|
|
int64_t pos = 0;
|
|
|
|
//FIXME: translate special tags to binary representation
|
|
while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
|
|
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);
|
|
|
|
avio_flush(pb);
|
|
|
|
av_free(wctx->sp_pairs);
|
|
av_free(wctx->st_pairs);
|
|
av_packet_unref(&wctx->thumbnail);
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_wtv_muxer = {
|
|
.name = "wtv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
|
.extensions = "wtv",
|
|
.priv_data_size = sizeof(WtvContext),
|
|
.audio_codec = AV_CODEC_ID_AC3,
|
|
.video_codec = AV_CODEC_ID_MPEG2VIDEO,
|
|
.write_header = write_header,
|
|
.write_packet = write_packet,
|
|
.write_trailer = write_trailer,
|
|
.codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags,
|
|
ff_codec_wav_tags, 0 },
|
|
};
|