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ffmpeg/libavformat/dvdvideodec.c
Marth64 f1abb754aa avformat/dvdvideodec: Fix incorrect padding cell trim logic 
When -trim option is used (by default), padding cells
at the beginning of the title are supposed to be ignored.
The current implementation does the ignoring after we
have locked on to the PGC navigation event stream,
but does not set the PGC/PG state properly.

This causes false positives and errors on some discs
due to a search for a program stream cell that
never succeeds. User would have to know to disable
the -trim option to work around the issue.

Simplify the logic and move it to the NAV packet
event handling, in turn implementing the behaviour
correctly and fixing the trim function for impacted discs.

Signed-off-by: Marth64 <marth64@proxyid.net>
2024-07-13 17:17:36 +02:00

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/*
* DVD-Video demuxer, powered by libdvdnav and libdvdread
*
* 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
*/
/*
* See doc/demuxers.texi for a high-level overview.
*
* The tactical approach is as follows:
* 1) Open the volume with dvdread
* 2) Analyze the user-requested title and PGC coordinates in the IFO structures
* 3) Request playback at the coordinates and chosen angle with dvdnav
* 5) Begin the playback (reading and demuxing) of MPEG-PS blocks
* 6) End playback if navigation goes backwards, to a menu, or a different PGC or angle
* 7) Close the dvdnav VM, and free dvdread's IFO structures
*/
#include <inttypes.h>
#include <dvdnav/dvdnav.h>
#include <dvdread/dvd_reader.h>
#include <dvdread/ifo_read.h>
#include <dvdread/ifo_types.h>
#include <dvdread/nav_read.h>
#include "libavutil/avstring.h"
#include "libavutil/avutil.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
#include "avformat.h"
#include "avio_internal.h"
#include "avlanguage.h"
#include "demux.h"
#include "dvdclut.h"
#include "internal.h"
#include "url.h"
#define DVDVIDEO_MAX_PS_SEARCH_BLOCKS 128
#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,
DVDVIDEO_SUBP_VIEWPORT_LETTERBOX,
DVDVIDEO_SUBP_VIEWPORT_PANSCAN
};
static const char dvdvideo_subp_viewport_labels[4][13] = {
"Fullscreen", "Widescreen", "Letterbox", "Pan and Scan"
};
typedef struct DVDVideoVTSVideoStreamEntry {
int startcode;
enum AVCodecID codec_id;
int width;
int height;
AVRational dar;
AVRational framerate;
int has_cc;
} DVDVideoVTSVideoStreamEntry;
typedef struct DVDVideoPGCAudioStreamEntry {
int startcode;
enum AVCodecID codec_id;
int sample_fmt;
int sample_rate;
int bit_depth;
int nb_channels;
AVChannelLayout ch_layout;
int disposition;
const char *lang_iso;
} DVDVideoPGCAudioStreamEntry;
typedef struct DVDVideoPGCSubtitleStreamEntry {
int startcode;
enum DVDVideoSubpictureViewport viewport;
int disposition;
uint32_t clut[FF_DVDCLUT_CLUT_LEN];
const char *lang_iso;
} DVDVideoPGCSubtitleStreamEntry;
typedef struct DVDVideoPlaybackState {
int celln; /* ID of the active cell */
int entry_pgn; /* ID of the PG we are starting in */
int in_pgc; /* if our navigator is in the PGC */
int in_ps; /* if our navigator is in the program stream */
int in_vts; /* if our navigator is in the VTS */
int64_t nav_pts; /* PTS according to IFO, not frame-accurate */
uint64_t pgc_duration_est; /* estimated duration as reported by IFO */
uint64_t pgc_elapsed; /* the elapsed time of the PGC, cell-relative */
int pgc_nb_pg_est; /* number of PGs as reported by IFOs */
int pgcn; /* ID of the PGC we are playing */
int pgn; /* ID of the PG we are in now */
int ptt; /* ID of the chapter we are in now */
int64_t ts_offset; /* PTS discontinuity offset (ex. VOB change) */
uint32_t vobu_duration; /* duration of the current VOBU */
uint32_t vobu_e_ptm; /* end PTM of the current VOBU */
int vtsn; /* ID of the active VTS (video title set) */
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 {
const AVClass *class;
/* options */
int opt_angle; /* the user-provided angle number (1-indexed) */
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_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) */
int opt_region; /* the user-provided region digit */
int opt_title; /* the user-provided title number (1-indexed) */
int opt_trim; /* trim padding cells at beginning */
/* subdemux */
AVFormatContext *mpeg_ctx; /* context for inner demuxer */
uint8_t *mpeg_buf; /* buffer for inner demuxer */
FFIOContext mpeg_pb; /* buffer context for inner demuxer */
/* volume */
dvd_reader_t *dvdread; /* handle to libdvdread */
ifo_handle_t *vmg_ifo; /* handle to the VMG (VIDEO_TS.IFO) */
ifo_handle_t *vts_ifo; /* handle to the active VTS (VTS_nn_n.IFO) */
/* playback control */
int64_t first_pts; /* the PTS of the first video keyframe */
int play_end; /* signal EOF to the parent demuxer */
DVDVideoPlaybackState play_state; /* the active playback state */
int play_started; /* signal that playback has started */
int segment_started; /* signal that subdemuxer is on a segment */
} DVDVideoDemuxContext;
static void dvdvideo_libdvdread_log(void *opaque, dvd_logger_level_t level,
const char *msg, va_list msg_va)
{
AVFormatContext *s = opaque;
char msg_buf[DVDVIDEO_LIBDVDX_LOG_BUFFER_SIZE];
int lavu_level = AV_LOG_DEBUG;
vsnprintf(msg_buf, sizeof(msg_buf), msg, msg_va);
if (level == DVD_LOGGER_LEVEL_ERROR)
lavu_level = AV_LOG_ERROR;
else if (level == DVD_LOGGER_LEVEL_WARN)
lavu_level = AV_LOG_WARNING;
av_log(s, lavu_level, "libdvdread: %s\n", msg_buf);
}
static void dvdvideo_libdvdnav_log(void *opaque, dvdnav_logger_level_t level,
const char *msg, va_list msg_va)
{
AVFormatContext *s = opaque;
char msg_buf[DVDVIDEO_LIBDVDX_LOG_BUFFER_SIZE];
int lavu_level = AV_LOG_DEBUG;
vsnprintf(msg_buf, sizeof(msg_buf), msg, msg_va);
if (level == DVDNAV_LOGGER_LEVEL_ERROR)
lavu_level = AV_LOG_ERROR;
/* some discs have invalid language codes set for menus, which throws noisy warnings */
else if (level == DVDNAV_LOGGER_LEVEL_WARN && !av_strstart(msg, "Language", NULL))
lavu_level = AV_LOG_WARNING;
av_log(s, lavu_level, "libdvdnav: %s\n", msg_buf);
}
static void dvdvideo_ifo_close(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
if (c->vts_ifo)
ifoClose(c->vts_ifo);
if (c->vmg_ifo)
ifoClose(c->vmg_ifo);
if (c->dvdread)
DVDClose(c->dvdread);
}
static int dvdvideo_ifo_open(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
dvd_logger_cb dvdread_log_cb;
title_info_t title_info;
dvdread_log_cb = (dvd_logger_cb) { .pf_log = dvdvideo_libdvdread_log };
c->dvdread = DVDOpen2(s, &dvdread_log_cb, s->url);
if (!c->dvdread) {
av_log(s, AV_LOG_ERROR, "Unable to open the DVD-Video structure\n");
return AVERROR_EXTERNAL;
}
if (!(c->vmg_ifo = ifoOpen(c->dvdread, 0))) {
av_log(s, AV_LOG_ERROR, "Unable to open the VMG (VIDEO_TS.IFO)\n");
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);
return AVERROR_STREAM_NOT_FOUND;
}
title_info = c->vmg_ifo->tt_srpt->title[c->opt_title - 1];
if (c->opt_angle > title_info.nr_of_angles) {
av_log(s, AV_LOG_ERROR, "Angle %d not found\n", c->opt_angle);
return AVERROR_STREAM_NOT_FOUND;
}
if (title_info.nr_of_ptts < 1) {
av_log(s, AV_LOG_ERROR, "Title %d has invalid headers (no PTTs found)\n", c->opt_title);
return AVERROR_INVALIDDATA;
}
if (c->opt_chapter_start > title_info.nr_of_ptts ||
(c->opt_chapter_end > 0 && c->opt_chapter_end > title_info.nr_of_ptts)) {
av_log(s, AV_LOG_ERROR, "Chapter (PTT) range [%d, %d] is invalid\n",
c->opt_chapter_start, c->opt_chapter_end);
return AVERROR_INVALIDDATA;
}
if (!(c->vts_ifo = ifoOpen(c->dvdread, title_info.title_set_nr))) {
av_log(s, AV_LOG_ERROR, "Unable to process IFO structure for VTS %d\n",
title_info.title_set_nr);
return AVERROR_EXTERNAL;
}
if (title_info.vts_ttn < 1 ||
title_info.vts_ttn > 99 ||
title_info.vts_ttn > c->vts_ifo->vts_ptt_srpt->nr_of_srpts ||
c->vts_ifo->vtsi_mat->nr_of_vts_audio_streams > 8 ||
c->vts_ifo->vtsi_mat->nr_of_vts_subp_streams > 32) {
av_log(s, AV_LOG_ERROR, "Title %d has invalid headers in VTS\n", c->opt_title);
return AVERROR_INVALIDDATA;
}
return 0;
}
static int dvdvideo_is_cell_promising(AVFormatContext *s, pgc_t *pgc, int celln)
{
dvd_time_t cell_duration = pgc->cell_playback[celln - 1].playback_time;
return cell_duration.second >= 1 || cell_duration.minute >= 1 || cell_duration.hour >= 1;
}
static int dvdvideo_is_pgc_promising(AVFormatContext *s, pgc_t *pgc)
{
for (int i = 1; i <= pgc->nr_of_cells; i++)
if (dvdvideo_is_cell_promising(s, pgc, i))
return 1;
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))
{
int64_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: offset=%d blocks_read=%" PRId64 "\n",
state->sector_offset, blocks_read);
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->in_ps = 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=%" PRId64 "\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)
return;
/* not allocated by av_malloc() */
if (state->pgc_pg_times_est)
free(state->pgc_pg_times_est);
if (dvdnav_close(state->dvdnav) != DVDNAV_STATUS_OK)
av_log(s, AV_LOG_ERROR, "Unable to close dvdnav successfully, dvdnav error: %s\n",
dvdnav_err_to_string(state->dvdnav));
}
static int dvdvideo_play_open(AVFormatContext *s, DVDVideoPlaybackState *state)
{
DVDVideoDemuxContext *c = s->priv_data;
dvdnav_logger_cb dvdnav_log_cb;
dvdnav_status_t dvdnav_open_status;
int32_t disc_region_mask;
int32_t player_region_mask;
int cur_title, cur_pgcn, cur_pgn;
pgc_t *pgc;
dvdnav_log_cb = (dvdnav_logger_cb) { .pf_log = dvdvideo_libdvdnav_log };
dvdnav_open_status = dvdnav_open2(&state->dvdnav, s, &dvdnav_log_cb, s->url);
if (!state->dvdnav ||
dvdnav_open_status != DVDNAV_STATUS_OK ||
dvdnav_set_readahead_flag(state->dvdnav, 0) != DVDNAV_STATUS_OK ||
dvdnav_set_PGC_positioning_flag(state->dvdnav, 1) != DVDNAV_STATUS_OK ||
dvdnav_get_region_mask(state->dvdnav, &disc_region_mask) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to open the DVD for playback\n");
goto end_dvdnav_error;
}
player_region_mask = c->opt_region > 0 ? (1 << (c->opt_region - 1)) : disc_region_mask;
if (dvdnav_set_region_mask(state->dvdnav, player_region_mask) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to set the playback region code %d\n", c->opt_region);
goto end_dvdnav_error;
}
if (c->opt_pgc > 0 && c->opt_pg > 0) {
if (dvdnav_program_play(state->dvdnav, c->opt_title, c->opt_pgc, c->opt_pg) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to start playback at title %d, PGC %d, PG %d\n",
c->opt_title, c->opt_pgc, c->opt_pg);
goto end_dvdnav_error;
}
state->pgcn = c->opt_pgc;
state->entry_pgn = c->opt_pg;
} else {
if (dvdnav_part_play(state->dvdnav, c->opt_title, c->opt_chapter_start) != DVDNAV_STATUS_OK ||
dvdnav_current_title_program(state->dvdnav, &cur_title, &cur_pgcn, &cur_pgn) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to start playback at title %d, chapter (PTT) %d\n",
c->opt_title, c->opt_chapter_start);
goto end_dvdnav_error;
}
state->pgcn = cur_pgcn;
state->entry_pgn = cur_pgn;
}
pgc = c->vts_ifo->vts_pgcit->pgci_srp[state->pgcn - 1].pgc;
if (pgc->pg_playback_mode != 0) {
av_log(s, AV_LOG_ERROR, "Non-sequential PGCs, such as shuffles, are not supported\n");
return AVERROR_PATCHWELCOME;
}
if (c->opt_trim && !dvdvideo_is_pgc_promising(s, pgc)) {
av_log(s, AV_LOG_ERROR, "Title %d, PGC %d looks empty (may consist of padding cells), "
"if you want to try anyway, disable the -trim option\n",
c->opt_title, state->pgcn);
return AVERROR_INVALIDDATA;
}
if (dvdnav_angle_change(state->dvdnav, c->opt_angle) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to start playback at angle %d\n", c->opt_angle);
goto end_dvdnav_error;
}
/* dvdnav_describe_title_chapters() performs several validations on the title structure */
/* take advantage of this side effect to increase chances of a safe navigation path */
state->pgc_nb_pg_est = dvdnav_describe_title_chapters(state->dvdnav, c->opt_title,
&state->pgc_pg_times_est,
&state->pgc_duration_est);
/* dvdnav returning 0 PGs is documented as an error condition */
if (!state->pgc_nb_pg_est) {
av_log(s, AV_LOG_ERROR, "Unable to read chapter information for title %d\n", c->opt_title);
goto end_dvdnav_error;
}
state->nav_pts = dvdnav_get_current_time(state->dvdnav);
state->vtsn = c->vmg_ifo->tt_srpt->title[c->opt_title - 1].title_set_nr;
state->pgc = pgc;
return 0;
end_dvdnav_error:
if (state->dvdnav)
av_log(s, AV_LOG_ERROR, "dvdnav error: %s\n", dvdnav_err_to_string(state->dvdnav));
else
av_log(s, AV_LOG_ERROR, "dvdnav could not be initialized\n");
return AVERROR_EXTERNAL;
}
static int dvdvideo_play_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState *state,
uint8_t *buf, int buf_size,
int *p_nav_event,
void (*flush_cb)(AVFormatContext *s))
{
DVDVideoDemuxContext *c = s->priv_data;
uint8_t nav_buf[DVDVIDEO_BLOCK_SIZE] = {0};
int nav_event;
int nav_len;
dvdnav_vts_change_event_t *e_vts;
dvdnav_cell_change_event_t *e_cell;
int cur_title, cur_pgcn, cur_pgn, cur_angle, cur_title_unused, cur_ptt, cur_nb_angles;
pci_t *e_pci;
dsi_t *e_dsi;
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);
}
for (int i = 0; i < DVDVIDEO_MAX_PS_SEARCH_BLOCKS; i++) {
if (ff_check_interrupt(&s->interrupt_callback))
return AVERROR_EXIT;
if (dvdnav_get_next_block(state->dvdnav, nav_buf, &nav_event, &nav_len) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to read next block of PGC\n");
goto end_dvdnav_error;
}
/* STOP event can come at any time and should be honored */
if (nav_event == DVDNAV_STOP)
return AVERROR_EOF;
if (nav_len > DVDVIDEO_BLOCK_SIZE) {
av_log(s, AV_LOG_ERROR, "Invalid block size (expected<=%d actual=%d)\n",
DVDVIDEO_BLOCK_SIZE, nav_len);
return AVERROR_INVALIDDATA;
}
if (dvdnav_current_title_info(state->dvdnav, &cur_title, &cur_ptt) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to determine current title coordinates\n");
goto end_dvdnav_error;
}
/* we somehow navigated to a menu */
if (cur_title == 0 || !dvdnav_is_domain_vts(state->dvdnav))
return AVERROR_EOF;
if (dvdnav_current_title_program(state->dvdnav, &cur_title_unused, &cur_pgcn, &cur_pgn) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to determine current PGC coordinates\n");
goto end_dvdnav_error;
}
/* we somehow left the PGC */
if (state->in_pgc && cur_pgcn != state->pgcn)
return AVERROR_EOF;
if (dvdnav_get_angle_info(state->dvdnav, &cur_angle, &cur_nb_angles) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to determine current video angle\n");
goto end_dvdnav_error;
}
av_log(s, nav_event == DVDNAV_BLOCK_OK ? AV_LOG_TRACE : AV_LOG_DEBUG,
"new block: i=%d nav_event=%d nav_len=%d cur_title=%d "
"cur_ptt=%d cur_angle=%d cur_celln=%d cur_pgcn=%d cur_pgn=%d "
"play_in_vts=%d play_in_pgc=%d play_in_ps=%d\n",
i, nav_event, nav_len, cur_title,
cur_ptt, cur_angle, state->celln, cur_pgcn, cur_pgn,
state->in_vts, state->in_pgc, state->in_ps);
switch (nav_event) {
case DVDNAV_VTS_CHANGE:
if (state->in_vts)
return AVERROR_EOF;
e_vts = (dvdnav_vts_change_event_t *) nav_buf;
if (e_vts->new_vtsN == state->vtsn && e_vts->new_domain == DVD_DOMAIN_VTSTitle)
state->in_vts = 1;
continue;
case DVDNAV_CELL_CHANGE:
if (!state->in_vts)
continue;
e_cell = (dvdnav_cell_change_event_t *) nav_buf;
av_log(s, AV_LOG_DEBUG, "new cell: prev=%d new=%d\n", state->celln, e_cell->cellN);
if (!state->in_ps && !state->in_pgc) {
if (cur_title == c->opt_title &&
(c->opt_pgc || cur_ptt == c->opt_chapter_start) &&
cur_pgcn == state->pgcn &&
cur_pgn == state->entry_pgn) {
state->in_pgc = 1;
}
} else if (state->celln >= e_cell->cellN || state->pgn > cur_pgn) {
return AVERROR_EOF;
}
state->celln = e_cell->cellN;
state->ptt = cur_ptt;
state->pgn = cur_pgn;
continue;
case DVDNAV_NAV_PACKET:
if (!state->in_pgc)
continue;
if ((state->ptt > 0 && state->ptt > cur_ptt) ||
(c->opt_chapter_end > 0 && cur_ptt > c->opt_chapter_end)) {
return AVERROR_EOF;
}
e_pci = dvdnav_get_current_nav_pci(state->dvdnav);
e_dsi = dvdnav_get_current_nav_dsi(state->dvdnav);
if (e_pci == NULL || e_dsi == NULL ||
e_pci->pci_gi.vobu_s_ptm > e_pci->pci_gi.vobu_e_ptm) {
av_log(s, AV_LOG_ERROR, "Invalid NAV packet\n");
return AVERROR_INVALIDDATA;
}
state->vobu_duration = e_pci->pci_gi.vobu_e_ptm - e_pci->pci_gi.vobu_s_ptm;
state->pgc_elapsed += state->vobu_duration;
state->nav_pts = dvdnav_get_current_time(state->dvdnav);
state->ptt = cur_ptt;
state->pgn = cur_pgn;
av_log(s, AV_LOG_DEBUG,
"NAV packet: s_ptm=%d e_ptm=%d "
"scr=%d lbn=%d vobu_duration=%d nav_pts=%" PRId64 "\n",
e_pci->pci_gi.vobu_s_ptm, e_pci->pci_gi.vobu_e_ptm,
e_dsi->dsi_gi.nv_pck_scr,
e_pci->pci_gi.nv_pck_lbn, state->vobu_duration, state->nav_pts);
if (!state->in_ps) {
if (c->opt_trim && !dvdvideo_is_cell_promising(s, state->pgc, state->celln)) {
av_log(s, AV_LOG_INFO, "Skipping padding cell #%d\n", state->celln);
i = 0;
continue;
}
av_log(s, AV_LOG_DEBUG, "navigation: locked to program stream\n");
state->in_ps = 1;
} else {
if (state->vobu_e_ptm != e_pci->pci_gi.vobu_s_ptm) {
if (flush_cb)
flush_cb(s);
state->ts_offset += state->vobu_e_ptm - e_pci->pci_gi.vobu_s_ptm;
}
}
state->vobu_e_ptm = e_pci->pci_gi.vobu_e_ptm;
(*p_nav_event) = nav_event;
return nav_len;
case DVDNAV_BLOCK_OK:
if (!state->in_ps) {
if (state->in_pgc)
i = 0; /* necessary in case we are skipping junk cells at the beginning */
continue;
}
if (nav_len != DVDVIDEO_BLOCK_SIZE) {
av_log(s, AV_LOG_ERROR, "Invalid MPEG block size (expected=%d actual=%d)\n",
DVDVIDEO_BLOCK_SIZE, nav_len);
return AVERROR_INVALIDDATA;
}
if (cur_angle != c->opt_angle) {
av_log(s, AV_LOG_ERROR, "Unexpected angle change (expected=%d new=%d)\n",
c->opt_angle, cur_angle);
return AVERROR_INPUT_CHANGED;
}
memcpy(buf, &nav_buf, nav_len);
if (state->pgn != cur_pgn)
av_log(s, AV_LOG_WARNING, "Unexpected PG change (expected=%d actual=%d); "
"this could be due to a missed NAV packet\n",
state->pgn, cur_pgn);
(*p_nav_event) = nav_event;
return nav_len;
case DVDNAV_WAIT:
if (dvdnav_wait_skip(state->dvdnav) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to skip WAIT event\n");
goto end_dvdnav_error;
}
continue;
case DVDNAV_STILL_FRAME:
case DVDNAV_HOP_CHANNEL:
case DVDNAV_HIGHLIGHT:
if (state->in_ps)
return AVERROR_EOF;
if (nav_event == DVDNAV_STILL_FRAME) {
if (dvdnav_still_skip(state->dvdnav) != DVDNAV_STATUS_OK) {
av_log(s, AV_LOG_ERROR, "Unable to skip still image\n");
goto end_dvdnav_error;
}
}
continue;
default:
continue;
}
}
av_log(s, AV_LOG_ERROR, "Unable to find next program stream block\n");
return AVERROR_INVALIDDATA;
end_dvdnav_error:
av_log(s, AV_LOG_ERROR, "dvdnav error (title=%d pgc=%d pg=%d cell=%d): %s\n",
cur_title, cur_pgcn, cur_pgn, state->celln,
dvdnav_err_to_string(state->dvdnav));
return AVERROR_EXTERNAL;
}
static int dvdvideo_chapters_setup_simple(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
uint64_t time_prev = 0;
int64_t total_duration = 0;
int chapter_start = c->opt_chapter_start;
int chapter_end = c->opt_chapter_end > 0 ? c->opt_chapter_end : c->play_state.pgc_nb_pg_est - 1;
/* dvdnav_describe_title_chapters() describes PGs rather than PTTs, so validate our range */
if (c->play_state.pgc_nb_pg_est == 1 ||
chapter_start > c->play_state.pgc_nb_pg_est ||
chapter_end > c->play_state.pgc_nb_pg_est) {
s->duration = av_rescale_q(c->play_state.pgc_duration_est,
DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q);
return 0;
}
for (int i = chapter_start - 1; i < chapter_end; i++) {
uint64_t time_effective = c->play_state.pgc_pg_times_est[i] - c->play_state.nav_pts;
if (time_effective - time_prev == 0)
continue;
if (chapter_start != chapter_end &&
!avpriv_new_chapter(s, i, DVDVIDEO_TIME_BASE_Q, time_prev, time_effective, NULL)) {
return AVERROR(ENOMEM);
}
time_prev = time_effective;
total_duration = time_effective;
}
if (c->opt_chapter_start == 1 && c->opt_chapter_end == 0)
s->duration = av_rescale_q(c->play_state.pgc_duration_est,
DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q);
else
s->duration = av_rescale_q(total_duration,
DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q);
return 0;
}
static int dvdvideo_chapters_setup_preindex(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
int ret = 0, interrupt = 0;
int nb_chapters = 0, last_ptt = c->opt_chapter_start;
uint64_t cur_chapter_offset = 0, cur_chapter_duration = 0;
DVDVideoPlaybackState state = {0};
uint8_t nav_buf[DVDVIDEO_BLOCK_SIZE];
int nav_event;
if (c->opt_chapter_start == c->opt_chapter_end)
return ret;
if ((ret = dvdvideo_play_open(s, &state)) < 0)
return ret;
if (state.pgc->nr_of_programs == 1)
goto end_close;
av_log(s, AV_LOG_INFO,
"Indexing chapter markers, this will take a long time. Please wait...\n");
while (!(interrupt = ff_check_interrupt(&s->interrupt_callback))) {
ret = dvdvideo_play_next_ps_block(s, &state, nav_buf, DVDVIDEO_BLOCK_SIZE,
&nav_event, NULL);
if (ret < 0 && ret != AVERROR_EOF)
goto end_close;
if (nav_event != DVDNAV_NAV_PACKET && ret != AVERROR_EOF)
continue;
if (state.ptt == last_ptt) {
cur_chapter_duration += state.vobu_duration;
/* ensure we add the last chapter */
if (ret != AVERROR_EOF)
continue;
}
if (cur_chapter_duration > 0) {
if (!avpriv_new_chapter(s, nb_chapters, DVDVIDEO_TIME_BASE_Q, cur_chapter_offset,
cur_chapter_offset + cur_chapter_duration, NULL)) {
ret = AVERROR(ENOMEM);
goto end_close;
}
nb_chapters++;
}
cur_chapter_offset += cur_chapter_duration;
cur_chapter_duration = state.vobu_duration;
last_ptt = state.ptt;
if (ret == AVERROR_EOF)
break;
}
if (interrupt) {
ret = AVERROR_EXIT;
goto end_close;
}
if (ret < 0 && ret != AVERROR_EOF)
goto end_close;
s->duration = av_rescale_q(state.pgc_elapsed, DVDVIDEO_TIME_BASE_Q, AV_TIME_BASE_Q);
av_log(s, AV_LOG_INFO, "Chapter marker indexing complete\n");
ret = 0;
end_close:
dvdvideo_play_close(s, &state);
return ret;
}
static int dvdvideo_video_stream_analyze(AVFormatContext *s, video_attr_t video_attr,
DVDVideoVTSVideoStreamEntry *entry)
{
AVRational framerate;
int height = 0;
int width = 0;
int is_pal = video_attr.video_format == 1;
framerate = is_pal ? (AVRational) { 25, 1 } : (AVRational) { 30000, 1001 };
height = is_pal ? 576 : 480;
if (height > 0) {
switch (video_attr.picture_size) {
case 0: /* D1 */
width = 720;
break;
case 1: /* 4CIF */
width = 704;
break;
case 2: /* Half D1 */
width = 352;
break;
case 3: /* CIF */
width = 352;
height /= 2;
break;
}
}
if (!width || !height) {
av_log(s, AV_LOG_ERROR, "Invalid video stream parameters in the IFO headers, "
"this could be an authoring error or empty title "
"(video_format=%d picture_size=%d)\n",
video_attr.video_format, video_attr.picture_size);
return AVERROR_INVALIDDATA;
}
entry->startcode = 0x1E0;
entry->codec_id = !video_attr.mpeg_version ? AV_CODEC_ID_MPEG1VIDEO : AV_CODEC_ID_MPEG2VIDEO;
entry->width = width;
entry->height = height;
entry->dar = video_attr.display_aspect_ratio ? (AVRational) { 16, 9 } : (AVRational) { 4, 3 };
entry->framerate = framerate;
entry->has_cc = !is_pal && (video_attr.line21_cc_1 || video_attr.line21_cc_2);
return 0;
}
static int dvdvideo_video_stream_add(AVFormatContext *s,
DVDVideoVTSVideoStreamEntry *entry,
enum AVStreamParseType need_parsing)
{
AVStream *st;
FFStream *sti;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->id = entry->startcode;
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = entry->codec_id;
st->codecpar->width = entry->width;
st->codecpar->height = entry->height;
st->codecpar->format = AV_PIX_FMT_YUV420P;
st->codecpar->color_range = AVCOL_RANGE_MPEG;
#if FF_API_R_FRAME_RATE
st->r_frame_rate = entry->framerate;
#endif
st->avg_frame_rate = entry->framerate;
sti = ffstream(st);
sti->request_probe = 0;
sti->need_parsing = need_parsing;
sti->display_aspect_ratio = entry->dar;
avpriv_set_pts_info(st, DVDVIDEO_PTS_WRAP_BITS,
DVDVIDEO_TIME_BASE_Q.num, DVDVIDEO_TIME_BASE_Q.den);
return 0;
}
static int dvdvideo_video_stream_setup(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
int ret;
DVDVideoVTSVideoStreamEntry entry = {0};
video_attr_t video_attr;
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");
return ret;
}
return 0;
}
static int dvdvideo_audio_stream_analyze(AVFormatContext *s, audio_attr_t audio_attr,
uint16_t audio_control, DVDVideoPGCAudioStreamEntry *entry)
{
int startcode = 0;
enum AVCodecID codec_id = AV_CODEC_ID_NONE;
int sample_fmt = AV_SAMPLE_FMT_NONE;
int sample_rate = 0;
int bit_depth = 0;
int nb_channels = 0;
AVChannelLayout ch_layout = (AVChannelLayout) {0};
char lang_dvd[3] = {0};
int position = (audio_control & 0x7F00) >> 8;
/* XXX(PATCHWELCOME): SDDS is not supported due to lack of sample material */
switch (audio_attr.audio_format) {
case 0: /* AC3 */
codec_id = AV_CODEC_ID_AC3;
sample_fmt = AV_SAMPLE_FMT_FLTP;
sample_rate = 48000;
startcode = 0x80 + position;
break;
case 2: /* MP1 */
codec_id = AV_CODEC_ID_MP1;
sample_fmt = audio_attr.quantization ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16;
sample_rate = 48000;
bit_depth = audio_attr.quantization ? 20 : 16;
startcode = 0x1C0 + position;
break;
case 3: /* MP2 */
codec_id = AV_CODEC_ID_MP2;
sample_fmt = audio_attr.quantization ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16;
sample_rate = 48000;
bit_depth = audio_attr.quantization ? 20 : 16;
startcode = 0x1C0 + position;
break;
case 4: /* DVD PCM */
codec_id = AV_CODEC_ID_PCM_DVD;
sample_fmt = audio_attr.quantization ? AV_SAMPLE_FMT_S32 : AV_SAMPLE_FMT_S16;
sample_rate = audio_attr.sample_frequency ? 96000 : 48000;
bit_depth = audio_attr.quantization == 2 ? 24 : (audio_attr.quantization ? 20 : 16);
startcode = 0xA0 + position;
break;
case 6: /* DCA */
codec_id = AV_CODEC_ID_DTS;
sample_fmt = AV_SAMPLE_FMT_FLTP;
sample_rate = 48000;
bit_depth = audio_attr.quantization == 2 ? 24 : (audio_attr.quantization ? 20 : 16);
startcode = 0x88 + position;
break;
}
nb_channels = audio_attr.channels + 1;
if (codec_id == AV_CODEC_ID_NONE ||
startcode == 0 ||
sample_fmt == AV_SAMPLE_FMT_NONE ||
sample_rate == 0 ||
nb_channels == 0) {
av_log(s, AV_LOG_ERROR, "Invalid audio stream parameters in the IFO headers, "
"this could be an authoring error or dummy title "
"(stream position %d in IFO)\n", position);
return AVERROR_INVALIDDATA;
}
if (nb_channels == 1)
ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_MONO;
else if (nb_channels == 2)
ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_STEREO;
else if (nb_channels == 6)
ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_5POINT1;
else if (nb_channels == 7)
ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_6POINT1;
else if (nb_channels == 8)
ch_layout = (AVChannelLayout) AV_CHANNEL_LAYOUT_7POINT1;
/* XXX(PATCHWELCOME): IFO structures have metadata on karaoke tracks for additional features */
if (audio_attr.application_mode == 1) {
entry->disposition |= AV_DISPOSITION_KARAOKE;
av_log(s, AV_LOG_WARNING, "Extended karaoke metadata is not supported at this time "
"(stream id=%d)\n", startcode);
}
if (audio_attr.code_extension == 2)
entry->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
if (audio_attr.code_extension == 3 || audio_attr.code_extension == 4)
entry->disposition |= AV_DISPOSITION_COMMENT;
AV_WB16(lang_dvd, audio_attr.lang_code);
entry->startcode = startcode;
entry->codec_id = codec_id;
entry->sample_rate = sample_rate;
entry->bit_depth = bit_depth;
entry->nb_channels = nb_channels;
entry->ch_layout = ch_layout;
entry->lang_iso = ff_convert_lang_to(lang_dvd, AV_LANG_ISO639_2_BIBL);
return 0;
}
static int dvdvideo_audio_stream_add(AVFormatContext *s, DVDVideoPGCAudioStreamEntry *entry,
enum AVStreamParseType need_parsing)
{
AVStream *st;
FFStream *sti;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->id = entry->startcode;
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = entry->codec_id;
st->codecpar->format = entry->sample_fmt;
st->codecpar->sample_rate = entry->sample_rate;
st->codecpar->bits_per_coded_sample = entry->bit_depth;
st->codecpar->bits_per_raw_sample = entry->bit_depth;
st->codecpar->ch_layout = entry->ch_layout;
st->codecpar->ch_layout.nb_channels = entry->nb_channels;
st->disposition = entry->disposition;
if (entry->lang_iso)
av_dict_set(&st->metadata, "language", entry->lang_iso, 0);
sti = ffstream(st);
sti->request_probe = 0;
sti->need_parsing = need_parsing;
avpriv_set_pts_info(st, DVDVIDEO_PTS_WRAP_BITS,
DVDVIDEO_TIME_BASE_Q.num, DVDVIDEO_TIME_BASE_Q.den);
return 0;
}
static int dvdvideo_audio_stream_add_all(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
int ret;
int nb_streams;
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, audio_attr, c->play_state.pgc->audio_control[i],
&entry)) < 0)
goto break_error;
/* IFO structures can declare duplicate entries for the same startcode */
for (int j = 0; j < s->nb_streams; j++)
if (s->streams[j]->id == entry.startcode)
continue;
if ((ret = dvdvideo_audio_stream_add(s, &entry, AVSTREAM_PARSE_HEADERS)) < 0)
goto break_error;
continue;
break_error:
av_log(s, AV_LOG_ERROR, "Unable to add audio stream at position %d\n", i);
return ret;
}
return 0;
}
static int dvdvideo_subp_stream_analyze(AVFormatContext *s, uint32_t offset, subp_attr_t subp_attr,
DVDVideoPGCSubtitleStreamEntry *entry)
{
DVDVideoDemuxContext *c = s->priv_data;
char lang_dvd[3] = {0};
entry->startcode = 0x20 + (offset & 0x1F);
if (subp_attr.lang_extension == 9)
entry->disposition |= AV_DISPOSITION_FORCED;
memcpy(&entry->clut, c->play_state.pgc->palette, FF_DVDCLUT_CLUT_SIZE);
/* dvdsub palettes currently have no colorspace tagging and all muxers only support RGB */
/* this is not a lossless conversion, but no use cases are supported for the original YUV */
ff_dvdclut_yuv_to_rgb(entry->clut, FF_DVDCLUT_CLUT_SIZE);
AV_WB16(lang_dvd, subp_attr.lang_code);
entry->lang_iso = ff_convert_lang_to(lang_dvd, AV_LANG_ISO639_2_BIBL);
return 0;
}
static int dvdvideo_subp_stream_add(AVFormatContext *s, DVDVideoPGCSubtitleStreamEntry *entry,
enum AVStreamParseType need_parsing)
{
AVStream *st;
FFStream *sti;
int ret;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->id = entry->startcode;
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
st->codecpar->codec_id = AV_CODEC_ID_DVD_SUBTITLE;
if ((ret = ff_dvdclut_palette_extradata_cat(entry->clut, FF_DVDCLUT_CLUT_SIZE, st->codecpar)) < 0)
return ret;
if (entry->lang_iso)
av_dict_set(&st->metadata, "language", entry->lang_iso, 0);
av_dict_set(&st->metadata, "VIEWPORT", dvdvideo_subp_viewport_labels[entry->viewport], 0);
st->disposition = entry->disposition;
sti = ffstream(st);
sti->request_probe = 0;
sti->need_parsing = need_parsing;
avpriv_set_pts_info(st, DVDVIDEO_PTS_WRAP_BITS,
DVDVIDEO_TIME_BASE_Q.num, DVDVIDEO_TIME_BASE_Q.den);
return 0;
}
static int dvdvideo_subp_stream_add_internal(AVFormatContext *s, uint32_t offset,
subp_attr_t subp_attr,
enum DVDVideoSubpictureViewport viewport)
{
int ret;
DVDVideoPGCSubtitleStreamEntry entry = {0};
entry.viewport = viewport;
if ((ret = dvdvideo_subp_stream_analyze(s, offset, subp_attr, &entry)) < 0)
goto end_error;
/* IFO structures can declare duplicate entries for the same startcode */
for (int i = 0; i < s->nb_streams; i++)
if (s->streams[i]->id == entry.startcode)
return 0;
if ((ret = dvdvideo_subp_stream_add(s, &entry, AVSTREAM_PARSE_HEADERS)) < 0)
goto end_error;
return 0;
end_error:
av_log(s, AV_LOG_ERROR, "Unable to add subtitle stream\n");
return ret;
}
static int dvdvideo_subp_stream_add_all(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
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;
uint32_t subp_control;
subp_attr_t subp_attr;
video_attr_t video_attr;
subp_control = c->play_state.pgc->subp_control[i];
if (!(subp_control & 0x80000000))
continue;
/* there can be several presentations for one SPU */
/* the DAR check is flexible in order to support weird authoring */
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) {
if ((ret = dvdvideo_subp_stream_add_internal(s, subp_control >> 24, subp_attr,
DVDVIDEO_SUBP_VIEWPORT_FULLSCREEN)) < 0)
return ret;
continue;
}
/* 16:9 */
if (( ret = dvdvideo_subp_stream_add_internal(s, subp_control >> 16, subp_attr,
DVDVIDEO_SUBP_VIEWPORT_WIDESCREEN)) < 0)
return ret;
/* 16:9 letterbox */
if (video_attr.permitted_df == 2 || video_attr.permitted_df == 0)
if ((ret = dvdvideo_subp_stream_add_internal(s, subp_control >> 8, subp_attr,
DVDVIDEO_SUBP_VIEWPORT_LETTERBOX)) < 0)
return ret;
/* 16:9 pan-and-scan */
if (video_attr.permitted_df == 1 || video_attr.permitted_df == 0)
if ((ret = dvdvideo_subp_stream_add_internal(s, subp_control, subp_attr,
DVDVIDEO_SUBP_VIEWPORT_PANSCAN)) < 0)
return ret;
}
return 0;
}
static void dvdvideo_subdemux_flush(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
if (!c->segment_started)
return;
av_log(s, AV_LOG_DEBUG, "flushing sub-demuxer\n");
avio_flush(&c->mpeg_pb.pub);
ff_read_frame_flush(c->mpeg_ctx);
c->segment_started = 0;
}
static int dvdvideo_subdemux_read_data(void *opaque, uint8_t *buf, int buf_size)
{
AVFormatContext *s = opaque;
DVDVideoDemuxContext *c = s->priv_data;
int ret = 0;
int nav_event;
if (c->play_end)
return AVERROR_EOF;
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;
c->play_end = 1;
return AVERROR_EOF;
}
if (ret >= 0 && nav_event == DVDNAV_NAV_PACKET)
return FFERROR_REDO;
return ret;
}
static void dvdvideo_subdemux_close(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
av_freep(&c->mpeg_pb.pub.buffer);
avformat_close_input(&c->mpeg_ctx);
}
static int dvdvideo_subdemux_open(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
extern const FFInputFormat ff_mpegps_demuxer;
int ret;
if (!(c->mpeg_buf = av_mallocz(DVDVIDEO_BLOCK_SIZE)))
return AVERROR(ENOMEM);
ffio_init_context(&c->mpeg_pb, c->mpeg_buf, DVDVIDEO_BLOCK_SIZE, 0, s,
dvdvideo_subdemux_read_data, NULL, NULL);
c->mpeg_pb.pub.seekable = 0;
if (!(c->mpeg_ctx = avformat_alloc_context()))
return AVERROR(ENOMEM);
if ((ret = ff_copy_whiteblacklists(c->mpeg_ctx, s)) < 0) {
avformat_free_context(c->mpeg_ctx);
c->mpeg_ctx = NULL;
return ret;
}
c->mpeg_ctx->flags = AVFMT_FLAG_CUSTOM_IO | AVFMT_FLAG_GENPTS;
c->mpeg_ctx->ctx_flags |= AVFMTCTX_UNSEEKABLE;
c->mpeg_ctx->probesize = 0;
c->mpeg_ctx->max_analyze_duration = 0;
c->mpeg_ctx->interrupt_callback = s->interrupt_callback;
c->mpeg_ctx->pb = &c->mpeg_pb.pub;
c->mpeg_ctx->correct_ts_overflow = 0;
c->mpeg_ctx->io_open = NULL;
return avformat_open_input(&c->mpeg_ctx, "", &ff_mpegps_demuxer.p, NULL);
}
static int dvdvideo_read_header(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
int ret;
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");
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_chapter_end != 0 && c->opt_chapter_start > c->opt_chapter_end) {
av_log(s, AV_LOG_ERROR, "Chapter (PTT) range [%d, %d] is invalid\n",
c->opt_chapter_start, c->opt_chapter_end);
return AVERROR(EINVAL);
}
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");
c->opt_title = 1;
}
if (c->opt_pgc) {
if (c->opt_pg == 0) {
av_log(s, AV_LOG_ERROR, "Invalid coordinates. If -pgc is set, -pg must be set too.\n");
return AVERROR(EINVAL);
} else if (c->opt_chapter_start > 1 || c->opt_chapter_end > 0 || c->opt_preindex) {
av_log(s, AV_LOG_ERROR, "-pgc is not compatible with the -preindex or "
"-chapter_start/-chapter_end options\n");
return AVERROR(EINVAL);
}
}
if ((ret = dvdvideo_ifo_open(s)) < 0)
return ret;
if (!c->opt_pgc && c->opt_preindex && (ret = dvdvideo_chapters_setup_preindex(s)) < 0)
return ret;
if ((ret = dvdvideo_play_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 ||
(ret = dvdvideo_subp_stream_add_all(s)) < 0)
return ret;
if (!c->opt_pgc && !c->opt_preindex)
return dvdvideo_chapters_setup_simple(s);
return 0;
}
static int dvdvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
{
DVDVideoDemuxContext *c = s->priv_data;
int ret;
enum AVMediaType st_type;
int found_stream = 0;
if (c->play_end)
return AVERROR_EOF;
ret = av_read_frame(c->mpeg_ctx, pkt);
if (ret < 0)
return ret;
if (!c->segment_started)
c->segment_started = 1;
st_type = c->mpeg_ctx->streams[pkt->stream_index]->codecpar->codec_type;
/* map the subdemuxer stream to the parent demuxer's stream (by startcode) */
for (int i = 0; i < s->nb_streams; i++) {
if (s->streams[i]->id == c->mpeg_ctx->streams[pkt->stream_index]->id) {
pkt->stream_index = s->streams[i]->index;
found_stream = 1;
break;
}
}
if (!found_stream) {
av_log(s, AV_LOG_DEBUG, "discarding frame with stream that was not in IFO headers "
"(stream id=%d)\n", c->mpeg_ctx->streams[pkt->stream_index]->id);
return FFERROR_REDO;
}
if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE) {
if (!c->play_started) {
/* try to start at the beginning of a GOP */
if (st_type != AVMEDIA_TYPE_VIDEO || !(pkt->flags & AV_PKT_FLAG_KEY)) {
av_log(s, AV_LOG_VERBOSE, "Discarding packet which is not a video keyframe or "
"with unset PTS/DTS at start\n");
return FFERROR_REDO;
}
c->first_pts = pkt->pts;
c->play_started = 1;
}
pkt->pts += c->play_state.ts_offset - c->first_pts;
pkt->dts += c->play_state.ts_offset - c->first_pts;
if (pkt->pts < 0) {
av_log(s, AV_LOG_VERBOSE, "Discarding packet with negative PTS (st=%d pts=%" PRId64 "), "
"this is OK at start of playback\n",
pkt->stream_index, pkt->pts);
return FFERROR_REDO;
}
} else {
av_log(s, AV_LOG_WARNING, "Unset PTS or DTS @ st=%d pts=%" PRId64 " dts=%" PRId64 "\n",
pkt->stream_index, pkt->pts, pkt->dts);
}
av_log(s, AV_LOG_TRACE, "st=%d pts=%" PRId64 " dts=%" PRId64 " "
"ts_offset=%" PRId64 " first_pts=%" PRId64 "\n",
pkt->stream_index, pkt->pts, pkt->dts,
c->play_state.ts_offset, c->first_pts);
return c->play_end ? AVERROR_EOF : 0;
}
static int dvdvideo_close(AVFormatContext *s)
{
DVDVideoDemuxContext *c = s->priv_data;
dvdvideo_subdemux_close(s);
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;
}
#define OFFSET(x) offsetof(DVDVideoDemuxContext, x)
static const AVOption dvdvideo_options[] = {
{"angle", "playback angle number", OFFSET(opt_angle), AV_OPT_TYPE_INT, { .i64=1 }, 1, 9, AV_OPT_FLAG_DECODING_PARAM },
{"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 },
{"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 },
{"region", "playback region number (0=free)", OFFSET(opt_region), AV_OPT_TYPE_INT, { .i64=0 }, 0, 8, AV_OPT_FLAG_DECODING_PARAM },
{"title", "title number (0=auto)", OFFSET(opt_title), AV_OPT_TYPE_INT, { .i64=0 }, 0, 99, AV_OPT_FLAG_DECODING_PARAM },
{"trim", "trim padding cells from start", OFFSET(opt_trim), AV_OPT_TYPE_BOOL, { .i64=1 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{NULL}
};
static const AVClass dvdvideo_class = {
.class_name = "DVD-Video demuxer",
.item_name = av_default_item_name,
.option = dvdvideo_options,
.version = LIBAVUTIL_VERSION_INT
};
const FFInputFormat ff_dvdvideo_demuxer = {
.p.name = "dvdvideo",
.p.long_name = NULL_IF_CONFIG_SMALL("DVD-Video"),
.p.priv_class = &dvdvideo_class,
.p.flags = AVFMT_NOFILE | AVFMT_SHOW_IDS | AVFMT_TS_DISCONT |
AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH | AVFMT_NOBINSEARCH,
.priv_data_size = sizeof(DVDVideoDemuxContext),
.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
.read_close = dvdvideo_close,
.read_header = dvdvideo_read_header,
.read_packet = dvdvideo_read_packet
};
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