[FFmpeg-devel] [PATCH 2/3] avformat/dvdvideodec: add menu demuxing support
Stefano Sabatini
stefasab at gmail.com
Wed Mar 6 17:41:56 EET 2024
On date Wednesday 2024-03-06 01:19:12 -0600, Marth64 wrote:
> Many DVDs have valuable assets in their menu structures, including background
> video or music. Some discs also abuse the menu feature to include actual
> feature footage that needs to change aspect ratio (in order to trick the DVD player).
>
> This patch allows extraction and archival of these assets, but does not enable
> controllable playback (which needs a full-fledged player and nav VM).
> Menus are processed directly with dvdread and the existing foundation of the demuxer.
>
> Will eventually add option to list their coordinates as well, so users
> do not have to rely on other tools to find them.
>
> Signed-off-by: Marth64 <marth64 at proxyid.net>
> ---
> doc/demuxers.texi | 43 +++++-
> libavformat/dvdvideodec.c | 315 ++++++++++++++++++++++++++++++++++++--
> 2 files changed, 339 insertions(+), 19 deletions(-)
>
> diff --git a/doc/demuxers.texi b/doc/demuxers.texi
> index 1a17c6db16..e2ea66c1a5 100644
> --- a/doc/demuxers.texi
> +++ b/doc/demuxers.texi
> @@ -289,8 +289,10 @@ This demuxer accepts the following option:
>
> DVD-Video demuxer, powered by libdvdnav and libdvdread.
>
> -Can directly ingest DVD titles, specifically sequential PGCs,
> -into a conversion pipeline. Menus and seeking are not supported at this time.
> +Can directly ingest DVD titles, specifically sequential PGCs, into
> +a conversion pipeline. Menu assets, such as background video or audio,
> +can also be demuxed given the menu's coordinates (at best effort).
> +Seeking is not supported at this time.
>
> Block devices (DVD drives), ISO files, and directory structures are accepted.
> Activate with @code{-f dvdvideo} in front of one of these inputs.
> @@ -347,37 +349,56 @@ This demuxer accepts the following options:
>
> @item title @var{int}
> The title number to play. Must be set if @option{pgc} and @option{pg} are not set.
> +Not applicable to menus.
> Default is 0 (auto), which currently only selects the first available title (title 1)
> and notifies the user about the implications.
>
> @item chapter_start @var{int}
> -The chapter, or PTT (part-of-title), number to start at. Default is 1.
> +The chapter, or PTT (part-of-title), number to start at. Not applicable to menus.
> +Default is 1.
>
> @item chapter_end @var{int}
> -The chapter, or PTT (part-of-title), number to end at. Default is 0,
> -which is a special value to signal end at the last possible chapter.
> +The chapter, or PTT (part-of-title), number to end at. Not applicable to menus.
> +Default is 0, which is a special value to signal end at the last possible chapter.
>
> @item angle @var{int}
> The video angle number, referring to what is essentially an additional
> video stream that is composed from alternate frames interleaved in the VOBs.
> +Not applicable to menus.
> Default is 1.
>
> @item region @var{int}
> The region code to use for playback. Some discs may use this to default playback
> at a particular angle in different regions. This option will not affect the region code
> -of a real DVD drive, if used as an input. Default is 0, "world".
> +of a real DVD drive, if used as an input. Not applicable to menus.
> +Default is 0, "world".
> +
> + at item menu @var{bool}
> +Demux menu assets instead of navigating a title. Requires exact coordinates
> +of the menu (@option{menu_lu}, @option{menu_vts}, @option{pgc}, @option{pg}).
> +Default is false.
> +
> + at item menu_lu @var{int}
> +The menu language to demux. In DVD, menus are grouped by language.
> +Default is 0, the first language unit.
> +
> + at item menu_vts @var{int}
> +The VTS where the menu lives, or 0 if it is a VMG menu (root-level).
> +Default is 0, VMG menu.
>
> @item pgc @var{int}
> The entry PGC to start playback, in conjunction with @option{pg}.
> Alternative to setting @option{title}.
> Chapter markers are not supported at this time.
> +Must be explicitly set for menus.
> Default is 0, automatically resolve from value of @option{title}.
>
> @item pg @var{int}
> The entry PG to start playback, in conjunction with @option{pgc}.
> Alternative to setting @option{title}.
> Chapter markers are not supported at this time.
> -Default is 0, automatically resolve from value of @option{title}.
> +Default is 0, automatically resolve from value of @option{title}, or
> +start from the beginning (PG 1) of the menu.
>
> @item preindex @var{bool}
> Enable this to have accurate chapter (PTT) markers and duration measurement,
> @@ -385,6 +406,7 @@ which requires a slow second pass read in order to index the chapter marker
> timestamps from NAV packets. This is non-ideal extra work for real optical drives.
> It is recommended and faster to use this option with a backup of the DVD structure
> stored on a hard drive. Not compatible with @option{pgc} and @option{pg}.
> +Not applicable to menus.
> Default is 0, false.
>
> @item trim @var{bool}
> @@ -392,6 +414,7 @@ Skip padding cells (i.e. cells shorter than 1 second) from the beginning.
> There exist many discs with filler segments at the beginning of the PGC,
> often with junk data intended for controlling a real DVD player's
> buffering speed and with no other material data value.
> +Not applicable to menus.
> Default is 1, true.
>
> @item clut_rgb @var{bool}
> @@ -421,6 +444,12 @@ Open only chapter 5 from title 1 from a given DVD structure:
> @example
> ffmpeg -f dvdvideo -chapter_start 5 -chapter_end 5 -title 1 -i <path to DVD> ...
> @end example
> +
> + at item
> +Demux menu with language 1 from VTS 1, PGC 1, starting at PG 1:
> + at example
> +ffmpeg -f dvdvideo -menu 1 -menu_lu 1 -menu_vts 1 -pgc 1 -pg 1 -i <path to DVD> ...
> + at end example
> @end itemize
>
> @section ea
> diff --git a/libavformat/dvdvideodec.c b/libavformat/dvdvideodec.c
> index 3bc76f5c65..2c7ffdd148 100644
> --- a/libavformat/dvdvideodec.c
> +++ b/libavformat/dvdvideodec.c
> @@ -57,9 +57,11 @@
> #define DVDVIDEO_BLOCK_SIZE 2048
> #define DVDVIDEO_TIME_BASE_Q (AVRational) { 1, 90000 }
> #define DVDVIDEO_PTS_WRAP_BITS 64 /* VOBUs use 32 (PES allows 33) */
> -
> #define DVDVIDEO_LIBDVDX_LOG_BUFFER_SIZE 1024
>
> +#define PCI_START_BYTE 45 /* complement dvdread's DSI_START_BYTE */
> +static const uint8_t dvdvideo_nav_header[4] = { 0x00, 0x00, 0x01, 0xBF };
> +
> enum DVDVideoSubpictureViewport {
> DVDVIDEO_SUBP_VIEWPORT_FULLSCREEN,
> DVDVIDEO_SUBP_VIEWPORT_WIDESCREEN,
> @@ -121,6 +123,15 @@ typedef struct DVDVideoPlaybackState {
> uint64_t *pgc_pg_times_est; /* PG start times as reported by IFO */
> pgc_t *pgc; /* handle to the active PGC */
> dvdnav_t *dvdnav; /* handle to the dvdnav VM */
> +
> + /* the following fields are only used for menu playback */
> + int celln_start; /* starting cell number */
> + int celln_end; /* ending cell number */
> + int sector_offset; /* current sector relative to the current VOB */
> + uint32_t sector_end; /* end sector relative to the current VOBU */
> + uint32_t vobu_next; /* the next VOBU pointer */
> + uint32_t vobu_remaining; /* remaining blocks for current VOBU */
> + dvd_file_t *vob_file; /* handle to the menu VOB (VMG or VTS) */
> } DVDVideoPlaybackState;
>
> typedef struct DVDVideoDemuxContext {
> @@ -131,6 +142,9 @@ typedef struct DVDVideoDemuxContext {
> int opt_chapter_end; /* the user-provided exit PTT (0 for last) */
> int opt_chapter_start; /* the user-provided entry PTT (1-indexed) */
> int opt_clut_rgb; /* output subtitle palette (CLUT) as RGB */
> + int opt_menu; /* demux menu domain instead of title domain */
> + int opt_menu_lu; /* the menu language unit (logical grouping) */
> + int opt_menu_vts; /* the menu VTS, or 0 for VMG (main menu) */
> int opt_pg; /* the user-provided PG number (1-indexed) */
> int opt_pgc; /* the user-provided PGC number (1-indexed) */
> int opt_preindex; /* pre-indexing mode (2-pass read) */
> @@ -227,6 +241,16 @@ static int dvdvideo_ifo_open(AVFormatContext *s)
> return AVERROR_EXTERNAL;
> }
>
> + if (c->opt_menu) {
> + if (c->opt_menu_vts > 0 && !(c->vts_ifo = ifoOpen(c->dvdread, c->opt_menu_vts))) {
> + av_log(s, AV_LOG_ERROR, "Unable to open IFO structure for VTS %d\n", c->opt_menu_vts);
> +
> + return AVERROR_EXTERNAL;
> + }
> +
> + return 0;
> + }
> +
> if (c->opt_title > c->vmg_ifo->tt_srpt->nr_of_srpts) {
> av_log(s, AV_LOG_ERROR, "Title %d not found\n", c->opt_title);
>
> @@ -290,6 +314,182 @@ static int dvdvideo_is_pgc_promising(AVFormatContext *s, pgc_t *pgc)
> return 0;
> }
>
> +static void dvdvideo_menu_close(AVFormatContext *s, DVDVideoPlaybackState *state)
> +{
> + if (state->vob_file)
> + DVDCloseFile(state->vob_file);
> +}
> +
> +static int dvdvideo_menu_open(AVFormatContext *s, DVDVideoPlaybackState *state)
> +{
> + DVDVideoDemuxContext *c = s->priv_data;
> + pgci_ut_t *pgci_ut;
> +
> + pgci_ut = c->opt_menu_vts ? c->vts_ifo->pgci_ut : c->vmg_ifo->pgci_ut;
> + if (!pgci_ut) {
> + av_log(s, AV_LOG_ERROR, "Invalid PGC table for menu [LU %d, PGC %d]\n",
> + c->opt_menu_lu, c->opt_pgc);
> +
> + return AVERROR_INVALIDDATA;
> + }
> +
> + if (c->opt_pgc < 1 ||
> + c->opt_menu_lu < 1 ||
> + c->opt_menu_lu > pgci_ut->nr_of_lus ||
> + c->opt_pgc > pgci_ut->lu[c->opt_menu_lu - 1].pgcit->nr_of_pgci_srp) {
> +
> + av_log(s, AV_LOG_ERROR, "Menu [LU %d, PGC %d] not found\n", c->opt_menu_lu, c->opt_pgc);
> +
> + return AVERROR(EINVAL);
> + }
> +
> + /* make sure the PGC is valid */
> + state->pgcn = c->opt_pgc - 1;
> + state->pgc = pgci_ut->lu[c->opt_menu_lu - 1].pgcit->pgci_srp[c->opt_pgc - 1].pgc;
> +
> + if (!state->pgc || !state->pgc->program_map || !state->pgc->cell_playback) {
> + av_log(s, AV_LOG_ERROR, "Invalid PGC structure for menu [LU %d, PGC %d]\n",
> + c->opt_menu_lu, c->opt_pgc);
> +
> + return AVERROR_INVALIDDATA;
> + }
> +
> + /* make sure the PG is valid */
> + state->entry_pgn = c->opt_pg;
> + if (state->entry_pgn < 1 || state->entry_pgn > state->pgc->nr_of_programs) {
> + av_log(s, AV_LOG_ERROR, "Entry PG %d not found\n", state->entry_pgn);
> +
> + return AVERROR(EINVAL);
> + }
> +
> + /* make sure the program map isn't leading us to nowhere */
> + state->celln_start = state->pgc->program_map[state->entry_pgn - 1];
> + state->celln_end = state->pgc->nr_of_cells;
> + state->celln = state->celln_start;
> + if (state->celln_start > state->pgc->nr_of_cells) {
> + av_log(s, AV_LOG_ERROR, "Invalid PGC structure: program map points to unknown cell\n");
> +
> + return AVERROR_INVALIDDATA;
> + }
> +
> + state->sector_end = state->pgc->cell_playback[state->celln - 1].last_sector;
> + state->vobu_next = state->pgc->cell_playback[state->celln - 1].first_sector;
> + state->sector_offset = state->vobu_next;
> +
> + if (c->opt_menu_vts > 0)
> + state->in_vts = 1;
> +
> + if (!(state->vob_file = DVDOpenFile(c->dvdread, c->opt_menu_vts, DVD_READ_MENU_VOBS))) {
> + av_log(s, AV_LOG_ERROR, !c->opt_menu_vts ?
> + "Unable to open main menu VOB (VIDEO_TS.VOB)\n" :
> + "Unable to open menu VOBs for VTS %d\n", c->opt_menu_vts);
> +
> + return AVERROR_EXTERNAL;
> + }
> +
> + return 0;
> +}
> +
> +static int dvdvideo_menu_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState *state,
> + uint8_t *buf, int buf_size,
> + void (*flush_cb)(AVFormatContext *s))
> +{
> + ssize_t blocks_read = 0;
> + uint8_t read_buf[DVDVIDEO_BLOCK_SIZE] = {0};
> + pci_t pci = (pci_t) {0};
> + dsi_t dsi = (dsi_t) {0};
> +
> + if (buf_size != DVDVIDEO_BLOCK_SIZE) {
> + av_log(s, AV_LOG_ERROR, "Invalid buffer size (expected=%d actual=%d)\n",
> + DVDVIDEO_BLOCK_SIZE, buf_size);
> +
> + return AVERROR(EINVAL);
> + }
> +
> + /* we were at the end of a vobu, so now go to the next one or EOF */
> + if (!state->vobu_remaining && state->in_pgc) {
> + if (state->vobu_next == SRI_END_OF_CELL) {
> + if (state->celln == state->celln_end && state->sector_offset > state->sector_end)
> + return AVERROR_EOF;
> +
> + state->celln++;
> + state->sector_offset = state->pgc->cell_playback[state->celln - 1].first_sector;
> + state->sector_end = state->pgc->cell_playback[state->celln - 1].last_sector;
> + } else {
> + state->sector_offset = state->vobu_next;
> + }
> + }
> +
> + /* continue reading the VOBU */
> + av_log(s, AV_LOG_TRACE, "reading block at offset %d\n", state->sector_offset);
> +
> + blocks_read = DVDReadBlocks(state->vob_file, state->sector_offset, 1, read_buf);
> + if (blocks_read != 1) {
> + av_log(s, AV_LOG_ERROR, "Unable to read VOB block at offset %d\n", state->sector_offset);
nit: you might show blocks_read in case it is an error message to aid
debugging
> +
> + return AVERROR_INVALIDDATA;
> + }
> +
> + /* we are at the start of a VOBU, so we are expecting a NAV packet */
> + if (!state->vobu_remaining) {
> + if (!memcmp(&read_buf[PCI_START_BYTE - 4], dvdvideo_nav_header, 4) ||
> + !memcmp(&read_buf[DSI_START_BYTE - 4], dvdvideo_nav_header, 4) ||
> + read_buf[PCI_START_BYTE - 1] != 0x00 ||
> + read_buf[DSI_START_BYTE - 1] != 0x01) {
> +
> + av_log(s, AV_LOG_ERROR, "Invalid NAV packet at offset %d: PCI or DSI header mismatch\n",
> + state->sector_offset);
> +
> + return AVERROR_INVALIDDATA;
> + }
> +
> + navRead_PCI(&pci, &read_buf[PCI_START_BYTE]);
> + navRead_DSI(&dsi, &read_buf[DSI_START_BYTE]);
> +
> + if (!pci.pci_gi.vobu_s_ptm ||
> + !pci.pci_gi.vobu_e_ptm ||
> + pci.pci_gi.vobu_s_ptm > pci.pci_gi.vobu_e_ptm) {
> +
> + av_log(s, AV_LOG_ERROR, "Invalid NAV packet at offset %d: PCI header is invalid\n",
> + state->sector_offset);
> +
> + return AVERROR_INVALIDDATA;
> + }
> +
> + state->vobu_remaining = dsi.dsi_gi.vobu_ea;
> + state->vobu_next = dsi.vobu_sri.next_vobu == SRI_END_OF_CELL ? SRI_END_OF_CELL :
> + dsi.dsi_gi.nv_pck_lbn + (dsi.vobu_sri.next_vobu & 0x7FFFFFFF);
> + state->sector_offset++;
> +
> + if (state->in_pgc) {
> + if (state->vobu_e_ptm != pci.pci_gi.vobu_s_ptm) {
> + if (flush_cb)
> + flush_cb(s);
> +
> + state->ts_offset += state->vobu_e_ptm - pci.pci_gi.vobu_s_ptm;
> + }
> + } else {
> + state->in_pgc = 1;
> + }
> +
> + state->vobu_e_ptm = pci.pci_gi.vobu_e_ptm;
> +
> + av_log(s, AV_LOG_DEBUG, "NAV packet: sector=%d "
> + "vobu_s_ptm=%d vobu_e_ptm=%d ts_offset=%ld\n",
> + dsi.dsi_gi.nv_pck_lbn,
> + pci.pci_gi.vobu_s_ptm, pci.pci_gi.vobu_e_ptm, state->ts_offset);
> +
> + return FFERROR_REDO;
> + }
> +
> + /* we are in the middle of a VOBU, so pass on the PS packet */
> + memcpy(buf, &read_buf, DVDVIDEO_BLOCK_SIZE);
> + state->sector_offset++;
> + state->vobu_remaining--;
> +
> + return DVDVIDEO_BLOCK_SIZE;
> +}
> +
> static void dvdvideo_play_close(AVFormatContext *s, DVDVideoPlaybackState *state)
> {
> if (!state->dvdnav)
> @@ -716,7 +916,7 @@ static int dvdvideo_chapters_setup_preindex(AVFormatContext *s)
> goto end_close;
>
> av_log(s, AV_LOG_INFO,
> - "Indexing chapter markers, this will take a long time. Please wait...\n");
> + "Indexing chapter markers, this may take a long time. Please wait...\n");
nit++: unrelated
>
> while (!(interrupt = ff_check_interrupt(&s->interrupt_callback))) {
> ret = dvdvideo_play_next_ps_block(s, &state, nav_buf, DVDVIDEO_BLOCK_SIZE,
> @@ -858,8 +1058,15 @@ static int dvdvideo_video_stream_setup(AVFormatContext *s)
>
> int ret = 0;
> DVDVideoVTSVideoStreamEntry entry = {0};
> + video_attr_t video_attr;
>
> - if ((ret = dvdvideo_video_stream_analyze(s, c->vts_ifo->vtsi_mat->vts_video_attr, &entry)) < 0 ||
> + if (c->opt_menu)
> + video_attr = !c->opt_menu_vts ? c->vmg_ifo->vmgi_mat->vmgm_video_attr :
> + c->vts_ifo->vtsi_mat->vtsm_video_attr;
> + else
> + video_attr = c->vts_ifo->vtsi_mat->vts_video_attr;
> +
> + if ((ret = dvdvideo_video_stream_analyze(s, video_attr, &entry)) < 0 ||
> (ret = dvdvideo_video_stream_add(s, &entry, AVSTREAM_PARSE_HEADERS)) < 0) {
>
> av_log(s, AV_LOG_ERROR, "Unable to add video stream\n");
> @@ -1009,15 +1216,29 @@ static int dvdvideo_audio_stream_add_all(AVFormatContext *s)
> DVDVideoDemuxContext *c = s->priv_data;
>
> int ret = 0;
> + int nb_streams;
>
> - for (int i = 0; i < c->vts_ifo->vtsi_mat->nr_of_vts_audio_streams; i++) {
> + if (c->opt_menu)
> + nb_streams = !c->opt_menu_vts ? c->vmg_ifo->vmgi_mat->nr_of_vmgm_audio_streams :
> + c->vts_ifo->vtsi_mat->nr_of_vtsm_audio_streams;
> + else
> + nb_streams = c->vts_ifo->vtsi_mat->nr_of_vts_audio_streams;
> +
> + for (int i = 0; i < nb_streams; i++) {
> DVDVideoPGCAudioStreamEntry entry = {0};
> + audio_attr_t audio_attr;
> +
> + if (c->opt_menu)
> + audio_attr = !c->opt_menu_vts ? c->vmg_ifo->vmgi_mat->vmgm_audio_attr :
> + c->vts_ifo->vtsi_mat->vtsm_audio_attr;
> + else
> + audio_attr = c->vts_ifo->vtsi_mat->vts_audio_attr[i];
>
> if (!(c->play_state.pgc->audio_control[i] & 0x8000))
> continue;
>
> - if ((ret = dvdvideo_audio_stream_analyze(s, c->vts_ifo->vtsi_mat->vts_audio_attr[i],
> - c->play_state.pgc->audio_control[i], &entry)) < 0)
> + if ((ret = dvdvideo_audio_stream_analyze(s, audio_attr, c->play_state.pgc->audio_control[i],
> + &entry)) < 0)
> goto break_error;
>
> /* IFO structures can declare duplicate entries for the same startcode */
> @@ -1127,7 +1348,16 @@ static int dvdvideo_subp_stream_add_all(AVFormatContext *s)
> {
> DVDVideoDemuxContext *c = s->priv_data;
>
> - for (int i = 0; i < c->vts_ifo->vtsi_mat->nr_of_vts_subp_streams; i++) {
> + int nb_streams;
> +
> + if (c->opt_menu)
> + nb_streams = !c->opt_menu_vts ? c->vmg_ifo->vmgi_mat->nr_of_vmgm_subp_streams :
> + c->vts_ifo->vtsi_mat->nr_of_vtsm_subp_streams;
> + else
> + nb_streams = c->vts_ifo->vtsi_mat->nr_of_vts_subp_streams;
> +
> +
> + for (int i = 0; i < nb_streams; i++) {
> int ret = 0;
> uint32_t subp_control;
> subp_attr_t subp_attr;
> @@ -1139,8 +1369,16 @@ static int dvdvideo_subp_stream_add_all(AVFormatContext *s)
>
> /* there can be several presentations for one SPU */
> /* the DAR check is flexible in order to support weird authoring */
> - video_attr = c->vts_ifo->vtsi_mat->vts_video_attr;
> - subp_attr = c->vts_ifo->vtsi_mat->vts_subp_attr[i];
> + if (c->opt_menu) {
> + video_attr = !c->opt_menu_vts ? c->vmg_ifo->vmgi_mat->vmgm_video_attr :
> + c->vts_ifo->vtsi_mat->vtsm_video_attr;
> +
> + subp_attr = !c->opt_menu_vts ? c->vmg_ifo->vmgi_mat->vmgm_subp_attr :
> + c->vts_ifo->vtsi_mat->vtsm_subp_attr;
> + } else {
> + video_attr = c->vts_ifo->vtsi_mat->vts_video_attr;
> + subp_attr = c->vts_ifo->vtsi_mat->vts_subp_attr[i];
> + }
>
> /* 4:3 */
> if (!video_attr.display_aspect_ratio) {
> @@ -1196,8 +1434,12 @@ static int dvdvideo_subdemux_read_data(void *opaque, uint8_t *buf, int buf_size)
> if (c->play_end)
> return AVERROR_EOF;
>
> - ret = dvdvideo_play_next_ps_block(opaque, &c->play_state, buf, buf_size,
> - &nav_event, dvdvideo_subdemux_flush);
> + if (c->opt_menu)
> + ret = dvdvideo_menu_next_ps_block(s, &c->play_state, buf, buf_size,
> + dvdvideo_subdemux_flush);
> + else
> + ret = dvdvideo_play_next_ps_block(opaque, &c->play_state, buf, buf_size,
> + &nav_event, dvdvideo_subdemux_flush);
>
> if (ret == AVERROR_EOF) {
> c->mpeg_pb.pub.eof_reached = 1;
> @@ -1261,6 +1503,47 @@ static int dvdvideo_read_header(AVFormatContext *s)
>
> int ret = 0;
>
> + if (c->opt_menu) {
> + if (c->opt_region ||
> + c->opt_title > 1 ||
> + c->opt_preindex ||
> + c->opt_chapter_start > 1 ||
> + c->opt_chapter_end > 0) {
> + av_log(s, AV_LOG_ERROR, "-menu is not compatible with the -region, -title, "
> + "-preindex, or -chapter_start/-chapter_end options\n");
unrelated note: I wonder if we should use "-foo" for mentioning
options, since this in theory might be used also from the API,
probably we should just say: the menu option is not compatible with
... (this is not blocking and might be addressed by a further patch).
> + return AVERROR(EINVAL);
> + }
> +
> + if (!c->opt_pgc) {
> + av_log(s, AV_LOG_ERROR, "If -menu is enabled, -pgc must be set to a non-zero value\n");
> +
> + return AVERROR(EINVAL);
> + }
> +
> + if (!c->opt_menu_lu) {
> + av_log(s, AV_LOG_INFO, "Defaulting to menu language unit #1. "
> + "This is not always desirable, validation suggested.\n");
> +
> + c->opt_menu_lu = 1;
> + }
> +
> + if (!c->opt_pg) {
> + av_log(s, AV_LOG_INFO, "Defaulting to menu PG #1. "
> + "This is not always desirable, validation suggested.\n");
> +
> + c->opt_pg = 1;
> + }
> +
> + if ((ret = dvdvideo_ifo_open(s)) < 0 ||
> + (ret = dvdvideo_menu_open(s, &c->play_state)) < 0 ||
> + (ret = dvdvideo_subdemux_open(s)) < 0 ||
> + (ret = dvdvideo_video_stream_setup(s)) < 0 ||
> + (ret = dvdvideo_audio_stream_add_all(s)) < 0)
> + return ret;
> +
> + return 0;
> + }
> +
> if (c->opt_title == 0) {
> av_log(s, AV_LOG_INFO, "Defaulting to title #1. "
> "This is not always the main feature, validation suggested.\n");
> @@ -1376,7 +1659,12 @@ static int dvdvideo_close(AVFormatContext *s)
> DVDVideoDemuxContext *c = s->priv_data;
>
> dvdvideo_subdemux_close(s);
> - dvdvideo_play_close(s, &c->play_state);
> +
> + if (c->opt_menu)
> + dvdvideo_menu_close(s, &c->play_state);
> + else
> + dvdvideo_play_close(s, &c->play_state);
> +
> dvdvideo_ifo_close(s);
>
> return 0;
> @@ -1388,6 +1676,9 @@ static const AVOption dvdvideo_options[] = {
> {"chapter_end", "exit chapter (PTT) number (0=end)", OFFSET(opt_chapter_end), AV_OPT_TYPE_INT, { .i64=0 }, 0, 99, AV_OPT_FLAG_DECODING_PARAM },
> {"chapter_start", "entry chapter (PTT) number", OFFSET(opt_chapter_start), AV_OPT_TYPE_INT, { .i64=1 }, 1, 99, AV_OPT_FLAG_DECODING_PARAM },
> {"clut_rgb", "output subtitle palette (CLUT) as RGB", OFFSET(opt_clut_rgb), AV_OPT_TYPE_BOOL, { .i64=1 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
> + {"menu", "demux menu domain", OFFSET(opt_menu), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
> + {"menu_lu", "menu language unit (0=auto)", OFFSET(opt_menu_lu), AV_OPT_TYPE_INT, { .i64=0 }, 0, 99, AV_OPT_FLAG_DECODING_PARAM },
> + {"menu_vts", "menu VTS (0=VMG main menu)", OFFSET(opt_menu_vts), AV_OPT_TYPE_INT, { .i64=0 }, 0, 99, AV_OPT_FLAG_DECODING_PARAM },
> {"pg", "entry PG number (0=auto)", OFFSET(opt_pg), AV_OPT_TYPE_INT, { .i64=0 }, 0, 255, AV_OPT_FLAG_DECODING_PARAM },
> {"pgc", "entry PGC number (0=auto)", OFFSET(opt_pgc), AV_OPT_TYPE_INT, { .i64=0 }, 0, 999, AV_OPT_FLAG_DECODING_PARAM },
> {"preindex", "enable for accurate chapter markers, slow (2-pass read)", OFFSET(opt_preindex), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
No more comments from me, nice feature!!
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