[FFmpeg-cvslog] WTV muxer (2_wtvenc.patch, 3_add_wtv_muxer.patch)
zhentan feng
git at videolan.org
Wed Sep 14 01:11:47 CEST 2011
ffmpeg | branch: master | zhentan feng <spyfeng at gmail.com> | Tue Sep 13 17:54:44 2011 +0800| [438debd095e050d79425da546379814fcc7e2886] | committer: Michael Niedermayer
WTV muxer (2_wtvenc.patch, 3_add_wtv_muxer.patch)
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=438debd095e050d79425da546379814fcc7e2886
---
Changelog | 1 +
libavformat/Makefile | 1 +
libavformat/allformats.c | 2 +-
libavformat/wtvenc.c | 718 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 721 insertions(+), 1 deletions(-)
diff --git a/Changelog b/Changelog
index aeaeda8..6678094 100644
--- a/Changelog
+++ b/Changelog
@@ -50,6 +50,7 @@ easier to use. The changes are:
- LATM muxer
- Speex encoder via libspeex
- JSON output in ffprobe
+- WTV muxer
version 0.8:
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 8796223..3ba4b51 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -305,6 +305,7 @@ OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood.o
OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood.o
OBJS-$(CONFIG_WTV_DEMUXER) += wtvdec.o wtv.o asfdec.o asf.o asfcrypt.o \
avlanguage.o mpegts.o isom.o riff.o
+OBJS-$(CONFIG_WTV_MUXER) += wtvenc.o wtv.o asf.o riff.o
OBJS-$(CONFIG_WV_DEMUXER) += wv.o apetag.o
OBJS-$(CONFIG_XA_DEMUXER) += xa.o
OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 5d0a484..1f0ac51 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -226,7 +226,7 @@ void av_register_all(void)
REGISTER_MUXER (WEBM, webm);
REGISTER_DEMUXER (WSAUD, wsaud);
REGISTER_DEMUXER (WSVQA, wsvqa);
- REGISTER_DEMUXER (WTV, wtv);
+ REGISTER_MUXDEMUX (WTV, wtv);
REGISTER_DEMUXER (WV, wv);
REGISTER_DEMUXER (XA, xa);
REGISTER_DEMUXER (XMV, xmv);
diff --git a/libavformat/wtvenc.c b/libavformat/wtvenc.c
new file mode 100644
index 0000000..c0254ff
--- /dev/null
+++ b/libavformat/wtvenc.c
@@ -0,0 +1,718 @@
+/*
+ * Windows Television (WTV) muxer
+ * Copyright (c) 2011 Zhentan Feng <spyfeng at gmail dot com>
+ * Copyright (c) 2011 Peter Ross <pross at 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
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "internal.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};
+static const ff_asf_guid stream1_guid =
+ {0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
+static const ff_asf_guid sync_guid =
+ {0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
+static const ff_asf_guid index_guid =
+ {0x96,0xc3,0xd2,0xc2,0x7e,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 timeline_start_pos;
+ WtvFile file[WTV_FILES];
+ int64_t serial; /** chunk serial number */
+ int64_t last_chunk_pos; /** last chunk position */
+ int64_t frame_nb;
+
+ WtvChunkEntry index[MAX_NB_INDEX];
+ int nb_index;
+ int first_video_flag;
+ int64_t sync_pos;
+} WtvContext;
+
+typedef int WTVHeaderWriteFunc(AVIOContext *pb);
+
+typedef struct {
+ const uint8_t *header;
+ int header_size;
+ WTVHeaderWriteFunc *write_header;
+}WTVRootEntryTable;
+
+static int write_pad(AVIOContext *pb, int size)
+{
+ for (; size > 0; size--)
+ avio_w8(pb, 0);
+ return 0;
+}
+
+static void put_guid(AVIOContext *s, const ff_asf_guid *g)
+{
+ assert(sizeof(*g) == 16);
+ avio_write(s, *g, sizeof(*g));
+ }
+
+static const ff_asf_guid *get_codec_guid(enum CodecID id, const AVCodecGuid *av_guid)
+{
+ int i;
+ for (i = 0; av_guid[i].id != CODEC_ID_NONE; i++) {
+ if (id == av_guid[i].id)
+ return &(av_guid[i].guid);
+ }
+ return NULL;
+}
+
+/**
+ * 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;
+ put_guid(pb, guid);
+ avio_wl32(pb, 32 + length);
+ avio_wl32(pb, stream_id);
+ avio_wl64(pb, wctx->serial);
+
+ if ((stream_id & 0x80000000) && guid != &index_guid) {
+ WtvChunkEntry *t = wctx->index + wctx->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, &index_guid, 0x80000000);
+ avio_wl32(pb, 0);
+ avio_wl32(pb, 0);
+
+ for (i = 0; i < wctx->nb_index; i++) {
+ WtvChunkEntry *t = wctx->index + i;
+ 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);
+}
+
+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 int write_stream_codec_info(AVFormatContext *s, AVStream *st)
+{
+ WtvContext *wctx = s->priv_data;
+ const ff_asf_guid *g, *media_type, *format_type;
+ AVIOContext *pb = s->pb;
+ int64_t hdr_pos_start;
+ int hdr_size = 0;
+
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ g = get_codec_guid(st->codec->codec_id, ff_video_guids);
+ media_type = &ff_mediatype_video;
+ format_type = &ff_format_mpeg2_video;
+ } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ g = get_codec_guid(st->codec->codec_id, ff_codec_wav_guids);
+ media_type = &ff_mediatype_audio;
+ format_type = &ff_format_waveformatex;
+ } else {
+ av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codec->codec_type);
+ return -1;
+ }
+
+ if (g == NULL) {
+ av_log(s, AV_LOG_ERROR, "can't get video codec_id (0x%x) guid.\n", st->codec->codec_id);
+ return -1;
+ }
+
+ put_guid(pb, media_type); // mediatype
+ put_guid(pb, &ff_mediasubtype_cpfilters_processed); // subtype
+ write_pad(pb, 12);
+ put_guid(pb,&ff_format_cpfilters_processed); // format type
+ avio_wl32(pb, 0); // size
+
+ hdr_pos_start = avio_tell(pb);
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (wctx->first_video_flag) {
+ write_pad(pb, 216); //The size is sensitive.
+ wctx->first_video_flag = 0;
+ } else {
+ write_pad(pb, 72); // aspect ratio
+ ff_put_bmp_header(pb, st->codec, ff_codec_bmp_tags, 0);
+ }
+ } else {
+ ff_put_wav_header(pb, st->codec);
+ }
+ 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);
+ put_guid(pb, g); // actual_subtype
+ 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, &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->codec->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;
+ wctx->sync_pos = avio_tell(pb) - wctx->timeline_start_pos;;
+
+ write_chunk_header(s, &sync_guid, 0x18, 0);
+ write_pad(pb, 24);
+
+ finish_chunk(s);
+
+ wctx->last_chunk_pos = last_chunk_pos;
+}
+
+static void write_DSATTRIB_TRANSPORT_PROPERTIES_init(AVFormatContext *s, int stream_index)
+{
+ AVIOContext *pb = s->pb;
+ write_chunk_header2(s, &ff_DSATTRIB_TRANSPORT_PROPERTIES, 0x80000000 | stream_index);
+ avio_wl64(pb, stream_index);
+ avio_wl64(pb, -1);
+ avio_wl64(pb, 0);
+ finish_chunk(s);
+}
+
+static int write_stream_data(AVFormatContext *s, AVStream *st, int flag)
+{
+ AVIOContext *pb = s->pb;
+ int ret;
+
+ if (!flag) {
+ write_chunk_header2(s, &ff_stream_guid, 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);
+ } else {
+ write_chunk_header2(s, &ff_stream2_guid, 0x80000000 | (st->index + INDEX_BASE));
+ 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->codec->codec_type);
+ return -1;
+ }
+ finish_chunk(s);
+
+ av_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;
+
+ put_guid(pb, &ff_wtv_guid);
+ 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];
+ 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->codec->codec_type);
+ return -1;
+ }
+ if (i + 1 < s->nb_streams) {
+ write_sync(s);
+ }
+ }
+
+ for (i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ ret = write_stream_data(s, st, 0);
+ 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},
+};
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