WTV muxer (2_wtvenc.patch, 3_add_wtv_muxer.patch)
This commit is contained in:
zhentan feng
Michael Niedermayer
parent
d06c5b44cc
commit
438debd095
@ -50,6 +50,7 @@ easier to use. The changes are:
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- LATM muxer
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- Speex encoder via libspeex
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- JSON output in ffprobe
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- WTV muxer
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version 0.8:
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@ -305,6 +305,7 @@ OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood.o
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OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood.o
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OBJS-$(CONFIG_WTV_DEMUXER) += wtvdec.o wtv.o asfdec.o asf.o asfcrypt.o \
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avlanguage.o mpegts.o isom.o riff.o
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OBJS-$(CONFIG_WTV_MUXER) += wtvenc.o wtv.o asf.o riff.o
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OBJS-$(CONFIG_WV_DEMUXER) += wv.o apetag.o
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OBJS-$(CONFIG_XA_DEMUXER) += xa.o
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OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o
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@ -226,7 +226,7 @@ void av_register_all(void)
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REGISTER_MUXER (WEBM, webm);
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REGISTER_DEMUXER (WSAUD, wsaud);
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REGISTER_DEMUXER (WSVQA, wsvqa);
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REGISTER_DEMUXER (WTV, wtv);
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REGISTER_MUXDEMUX (WTV, wtv);
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REGISTER_DEMUXER (WV, wv);
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REGISTER_DEMUXER (XA, xa);
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REGISTER_DEMUXER (XMV, xmv);
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718
libavformat/wtvenc.c
Normal file
718
libavformat/wtvenc.c
Normal file
@ -0,0 +1,718 @@
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/*
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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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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.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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static const ff_asf_guid stream1_guid =
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{0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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static const ff_asf_guid sync_guid =
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{0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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static const ff_asf_guid index_guid =
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{0x96,0xc3,0xd2,0xc2,0x7e,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 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 frame_nb;
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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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int64_t sync_pos;
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} WtvContext;
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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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static int write_pad(AVIOContext *pb, int size)
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{
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for (; size > 0; size--)
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avio_w8(pb, 0);
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return 0;
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}
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static void put_guid(AVIOContext *s, const ff_asf_guid *g)
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{
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assert(sizeof(*g) == 16);
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avio_write(s, *g, sizeof(*g));
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}
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static const ff_asf_guid *get_codec_guid(enum CodecID id, const AVCodecGuid *av_guid)
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{
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int i;
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for (i = 0; av_guid[i].id != CODEC_ID_NONE; i++) {
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if (id == av_guid[i].id)
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return &(av_guid[i].guid);
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}
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return NULL;
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}
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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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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 != &index_guid) {
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WtvChunkEntry *t = wctx->index + wctx->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, &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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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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}
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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 int write_stream_codec_info(AVFormatContext *s, AVStream *st)
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{
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WtvContext *wctx = s->priv_data;
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const ff_asf_guid *g, *media_type, *format_type;
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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->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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g = get_codec_guid(st->codec->codec_id, ff_video_guids);
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media_type = &ff_mediatype_video;
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format_type = &ff_format_mpeg2_video;
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} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
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g = get_codec_guid(st->codec->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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} else {
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av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codec->codec_type);
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return -1;
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}
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if (g == NULL) {
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av_log(s, AV_LOG_ERROR, "can't get video codec_id (0x%x) guid.\n", st->codec->codec_id);
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return -1;
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}
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put_guid(pb, media_type); // mediatype
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put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype
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write_pad(pb, 12);
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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->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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if (wctx->first_video_flag) {
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write_pad(pb, 216); //The size is sensitive.
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wctx->first_video_flag = 0;
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} else {
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write_pad(pb, 72); // aspect ratio
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ff_put_bmp_header(pb, st->codec, ff_codec_bmp_tags, 0);
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}
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} else {
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ff_put_wav_header(pb, st->codec);
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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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put_guid(pb, g); // actual_subtype
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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, &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->codec->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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wctx->sync_pos = avio_tell(pb) - wctx->timeline_start_pos;;
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write_chunk_header(s, &sync_guid, 0x18, 0);
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write_pad(pb, 24);
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finish_chunk(s);
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wctx->last_chunk_pos = last_chunk_pos;
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}
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static void write_DSATTRIB_TRANSPORT_PROPERTIES_init(AVFormatContext *s, int stream_index)
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{
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AVIOContext *pb = s->pb;
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write_chunk_header2(s, &ff_DSATTRIB_TRANSPORT_PROPERTIES, 0x80000000 | stream_index);
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avio_wl64(pb, stream_index);
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avio_wl64(pb, -1);
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avio_wl64(pb, 0);
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finish_chunk(s);
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}
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static int write_stream_data(AVFormatContext *s, AVStream *st, int flag)
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{
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AVIOContext *pb = s->pb;
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int ret;
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if (!flag) {
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write_chunk_header2(s, &ff_stream_guid, 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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} else {
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write_chunk_header2(s, &ff_stream2_guid, 0x80000000 | (st->index + INDEX_BASE));
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write_pad(pb, 4);
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}
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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->codec->codec_type);
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return -1;
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}
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finish_chunk(s);
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av_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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put_guid(pb, &ff_wtv_guid);
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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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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->codec->codec_type);
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return -1;
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}
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if (i + 1 < s->nb_streams) {
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write_sync(s);
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}
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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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ret = write_stream_data(s, st, 0);
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if (ret < 0) {
|
||||
av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codec->codec_type);
|
||||
return -1;
|
||||
}
|
||||
ret = write_stream_data(s, st, 1);
|
||||
if (ret < 0) {
|
||||
av_log(s, AV_LOG_ERROR, "write stream2 data failed codec_type(0x%x)\n", st->codec->codec_type);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < s->nb_streams; i++)
|
||||
write_DSATTRIB_TRANSPORT_PROPERTIES_init(s, INDEX_BASE + i);
|
||||
|
||||
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;
|
||||
AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
|
||||
int flag = 0;
|
||||
int64_t frame_number = 0;
|
||||
|
||||
if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
|
||||
wctx->frame_nb++;
|
||||
frame_number = wctx->frame_nb;
|
||||
flag = pkt->flags & AV_PKT_FLAG_KEY ? 1 : 0;
|
||||
}
|
||||
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, frame_number);
|
||||
avio_wl64(pb, 0);
|
||||
avio_wl64(pb, flag);
|
||||
avio_wl64(pb, 0);
|
||||
}
|
||||
|
||||
static int write_packet(AVFormatContext *s, AVPacket *pkt)
|
||||
{
|
||||
AVIOContext *pb = s->pb;
|
||||
WtvContext *wctx = s->priv_data;
|
||||
|
||||
// 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++;
|
||||
avio_flush(pb);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int write_table0_header_envents(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_envents},
|
||||
{ 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;
|
||||
|
||||
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));
|
||||
}
|
||||
|
||||
static int 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;
|
||||
|
||||
//FIXME: output frame_nb, position pairs.
|
||||
//We only set the first sync_chunk position here.
|
||||
avio_wl64(pb, 0x2); avio_wl64(pb, wctx->sync_pos);
|
||||
}
|
||||
|
||||
static void write_tag(AVIOContext *pb, const char *key, const char *value)
|
||||
{
|
||||
put_guid(pb, &ff_metadata_guid);
|
||||
avio_wl32(pb, 1);
|
||||
avio_wl32(pb, strlen(value)*2 + 2);
|
||||
avio_put_str16le(pb, key);
|
||||
avio_put_str16le(pb, value);
|
||||
}
|
||||
|
||||
static void write_table_entries_attrib(AVFormatContext *s)
|
||||
{
|
||||
AVDictionaryEntry *tag = 0;
|
||||
|
||||
//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(s->pb, tag->key, tag->value);
|
||||
}
|
||||
|
||||
static void write_table_redirector_legacy_attrib(AVFormatContext *s)
|
||||
{
|
||||
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 += 16 + 4 + 4 + strlen(tag->key)*2 + 2 + strlen(tag->value)*2 + 2;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 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;
|
||||
|
||||
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);
|
||||
} else {
|
||||
w->first_sector = start_pos;
|
||||
}
|
||||
w->first_sector >>= 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);
|
||||
//FIXME: output timestamp, frame_nb pairs here.
|
||||
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);
|
||||
return 0;
|
||||
}
|
||||
|
||||
AVOutputFormat ff_wtv_muxer = {
|
||||
"wtv",
|
||||
NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
||||
NULL,
|
||||
"wtv",
|
||||
sizeof(WtvContext),
|
||||
CODEC_ID_MP2,
|
||||
CODEC_ID_MPEG2VIDEO,
|
||||
write_header,
|
||||
write_packet,
|
||||
write_trailer,
|
||||
.codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user