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Code Issues Releases Activity

avformat/dvdvideodec: standardize the NAV packet event signal

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This consolidates the FFERROR_REDO handling of NAV packets to
dvdvideo_subdemux_read_data(), is a pre-requisite to calculating
chapter markers for menus, and a pre-requisite to fixing the
frame desync issue when the subdemuxer is flushed.

Signed-off-by: Marth64 <marth64@proxyid.net>
This commit is contained in:
Marth64 2024-10-07 18:04:54 -05:00
parent 6bbaa7db49
commit b38ca20bf2
1 changed files with 17 additions and 14 deletions
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31
libavformat/dvdvideodec.c
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@ -390,7 +390,7 @@ static int dvdvideo_menu_open(AVFormatContext *s, DVDVideoPlaybackState *state)
}
static int dvdvideo_menu_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState *state,
uint8_t *buf, int buf_size,
uint8_t *buf, int buf_size, int *p_is_nav_packet,
void (*flush_cb)(AVFormatContext *s))
{
int64_t blocks_read = 0;
@ -398,6 +398,8 @@ static int dvdvideo_menu_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState
pci_t pci = (pci_t) {0};
dsi_t dsi = (dsi_t) {0};
(*p_is_nav_packet) = 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);
@ -481,7 +483,9 @@ static int dvdvideo_menu_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState
dsi.dsi_gi.nv_pck_lbn,
pci.pci_gi.vobu_s_ptm, pci.pci_gi.vobu_e_ptm, state->ts_offset);
return FFERROR_REDO;
(*p_is_nav_packet) = 1;
return 0;
}
/* we are in the middle of a VOBU, so pass on the PS packet */
@ -611,8 +615,7 @@ end_dvdnav_error:
}
static int dvdvideo_play_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState *state,
uint8_t *buf, int buf_size,
int *p_nav_event,
uint8_t *buf, int buf_size, int *p_is_nav_packet,
void (*flush_cb)(AVFormatContext *s))
{
DVDVideoDemuxContext *c = s->priv_data;
@ -627,6 +630,8 @@ static int dvdvideo_play_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState
pci_t *e_pci;
dsi_t *e_dsi;
(*p_is_nav_packet) = 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);
@ -780,9 +785,9 @@ static int dvdvideo_play_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState
state->vobu_e_ptm = e_pci->pci_gi.vobu_e_ptm;
(*p_nav_event) = nav_event;
(*p_is_nav_packet) = 1;
return nav_len;
return 0;
case DVDNAV_BLOCK_OK:
if (!state->in_ps) {
if (state->in_pgc)
@ -811,8 +816,6 @@ static int dvdvideo_play_next_ps_block(AVFormatContext *s, DVDVideoPlaybackState
memcpy(buf, &nav_buf, nav_len);
(*p_nav_event) = nav_event;
state->is_seeking = 0;
return nav_len;
@ -1442,18 +1445,18 @@ 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;
int ret;
int is_nav_packet;
if (c->play_end)
return AVERROR_EOF;
if (c->opt_menu)
ret = dvdvideo_menu_next_ps_block(s, &c->play_state, buf, buf_size,
ret = dvdvideo_menu_next_ps_block(s, &c->play_state, buf, buf_size, &is_nav_packet,
dvdvideo_subdemux_flush);
else
ret = dvdvideo_play_next_ps_block(opaque, &c->play_state, buf, buf_size,
&nav_event, dvdvideo_subdemux_flush);
ret = dvdvideo_play_next_ps_block(s, &c->play_state, buf, buf_size, &is_nav_packet,
dvdvideo_subdemux_flush);
if (ret == AVERROR_EOF) {
c->mpeg_pb.pub.eof_reached = 1;
@ -1462,7 +1465,7 @@ static int dvdvideo_subdemux_read_data(void *opaque, uint8_t *buf, int buf_size)
return AVERROR_EOF;
}
if (ret >= 0 && nav_event == DVDNAV_NAV_PACKET)
if (ret == 0 && is_nav_packet)
return FFERROR_REDO;
return ret;