mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-30 13:41:48 +00:00
Code Issues 1 Projects Releases Wiki Activity

gst/avi/gstavidemux.*: Yeah, implement proper seeking. Exact seeking and segment seeking.

Browse source 
Original commit message from CVS:
* gst/avi/gstavidemux.c: (gst_avi_demux_reset),
(gst_avi_demux_src_convert), (gst_avi_demux_handle_src_event),
(gst_avi_demux_stream_header), (gst_avi_demux_handle_seek),
(gst_avi_demux_process_next_entry), (gst_avi_demux_stream_data),
(gst_avi_demux_loop):
* gst/avi/gstavidemux.h:
Yeah, implement proper seeking. Exact seeking and segment seeking.
Still need to do some checks for segment_stop.
This commit is contained in:
Edward Hervey 2005-11-11 16:48:58 +00:00
parent 0c911ec4de
commit ad2f2ea24b
3 changed files with 196 additions and 141 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
ChangeLog
View file

@ -1,3 +1,14 @@
2005-11-11 Edward Hervey <edward@fluendo.com>
* gst/avi/gstavidemux.c: (gst_avi_demux_reset),
(gst_avi_demux_src_convert), (gst_avi_demux_handle_src_event),
(gst_avi_demux_stream_header), (gst_avi_demux_handle_seek),
(gst_avi_demux_process_next_entry), (gst_avi_demux_stream_data),
(gst_avi_demux_loop):
* gst/avi/gstavidemux.h:
Yeah, implement proper seeking. Exact seeking and segment seeking.
Still need to do some checks for segment_stop.
2005-11-10 Josef Zlomek <josef dot zlomek at xeris dot cz> 2005-11-10 Josef Zlomek <josef dot zlomek at xeris dot cz>
Reviewed by: Tim-Philipp Müller <tim at centricular dot net> Reviewed by: Tim-Philipp Müller <tim at centricular dot net>

317
gst/avi/gstavidemux.c
View file

@ -27,6 +27,7 @@
#include "gst/riff/riff-media.h" #include "gst/riff/riff-media.h"
#include "gstavidemux.h" #include "gstavidemux.h"
#include "avi-ids.h" #include "avi-ids.h"
#include <gst/gst-i18n-plugin.h>
GST_DEBUG_CATEGORY_STATIC (avidemux_debug); GST_DEBUG_CATEGORY_STATIC (avidemux_debug);
#define GST_CAT_DEFAULT avidemux_debug #define GST_CAT_DEFAULT avidemux_debug
@ -59,7 +60,7 @@ static gboolean gst_avi_demux_src_convert (GstPad * pad,
GstFormat src_format, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value); gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, guint64 time); static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, gboolean update);
static void gst_avi_demux_loop (GstPad * pad); static void gst_avi_demux_loop (GstPad * pad);
static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad); static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad);
static gboolean gst_avi_demux_sink_activate_pull (GstPad * sinkpad, static gboolean gst_avi_demux_sink_activate_pull (GstPad * sinkpad,
@ -190,10 +191,14 @@ gst_avi_demux_reset (GstAviDemux * avi)
g_free (avi->avih); g_free (avi->avih);
avi->avih = NULL; avi->avih = NULL;
avi->seek_offset = (guint64) - 1;
if (avi->seek_event) if (avi->seek_event)
gst_event_unref (avi->seek_event); gst_event_unref (avi->seek_event);
avi->seek_event = NULL; avi->seek_event = NULL;
avi->segment_rate = 1.0;
avi->segment_flags = 0;
avi->segment_start = -1;
avi->segment_stop = -1;
} }
static gst_avi_index_entry * static gst_avi_index_entry *
@ -218,6 +223,8 @@ gst_avi_demux_index_entry_for_time (GstAviDemux * avi,
gst_avi_index_entry *entry = NULL, *last_entry = NULL; gst_avi_index_entry *entry = NULL, *last_entry = NULL;
gint i; gint i;
GST_LOG_OBJECT (avi, "stream_nr:%d , time:%" GST_TIME_FORMAT " flags:%d",
stream_nr, GST_TIME_ARGS (time), flags);
i = -1; i = -1;
do { do {
entry = gst_avi_demux_index_next (avi, stream_nr, i + 1); entry = gst_avi_demux_index_next (avi, stream_nr, i + 1);
@ -226,6 +233,10 @@ gst_avi_demux_index_entry_for_time (GstAviDemux * avi,
i = entry->index_nr; i = entry->index_nr;
GST_LOG_OBJECT (avi,
"looking at entry %d / ts:%" GST_TIME_FORMAT " / dur:%" GST_TIME_FORMAT
" flags:%d", i, GST_TIME_ARGS (entry->ts), GST_TIME_ARGS (entry->dur),
entry->flags);
if (entry->ts <= time && (entry->flags & flags) == flags) if (entry->ts <= time && (entry->flags & flags) == flags)
last_entry = entry; last_entry = entry;
} while (entry->ts < time); } while (entry->ts < time);
@ -233,49 +244,6 @@ gst_avi_demux_index_entry_for_time (GstAviDemux * avi,
return last_entry; return last_entry;
} }
static gst_avi_index_entry *
gst_avi_demux_index_entry_for_byte (GstAviDemux * avi,
gint stream_nr, guint64 byte, guint32 flags)
{
gst_avi_index_entry *entry = NULL, *last_entry = NULL;
gint i;
i = -1;
do {
entry = gst_avi_demux_index_next (avi, stream_nr, i + 1);
if (!entry)
return NULL;
i = entry->index_nr;
if (entry->bytes_before <= byte && (entry->flags & flags) == flags)
last_entry = entry;
} while (entry->bytes_before < byte);
return last_entry;
}
static gst_avi_index_entry *
gst_avi_demux_index_entry_for_frame (GstAviDemux * avi,
gint stream_nr, guint32 frame, guint32 flags)
{
gst_avi_index_entry *entry = NULL, *last_entry = NULL;
gint i;
i = -1;
do {
entry = gst_avi_demux_index_next (avi, stream_nr, i + 1);
if (!entry)
return NULL;
i = entry->index_nr;
if (entry->frames_before <= frame && (entry->flags & flags) == flags)
last_entry = entry;
} while (entry->frames_before < frame);
return last_entry;
}
#if 0 #if 0
static const GstFormat * static const GstFormat *
@ -306,18 +274,27 @@ gst_avi_demux_src_convert (GstPad * pad,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value) gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
{ {
gboolean res = TRUE; gboolean res = TRUE;
GstAviDemux *avidemux = GST_AVI_DEMUX (gst_pad_get_parent (pad));
avi_stream_context *stream = gst_pad_get_element_private (pad); avi_stream_context *stream = gst_pad_get_element_private (pad);
GST_LOG_OBJECT (avidemux,
"Received src_format:%d, src_value:%lld, dest_format:%d", src_format,
src_value, *dest_format);
if (src_format == *dest_format) { if (src_format == *dest_format) {
*dest_value = src_value; *dest_value = src_value;
return TRUE; goto done;
}
if (!stream->strh || !stream->strf.data) {
res = FALSE;
goto done;
} }
if (!stream->strh || !stream->strf.data)
return FALSE;
if (stream->strh->type == GST_RIFF_FCC_vids && if (stream->strh->type == GST_RIFF_FCC_vids &&
(src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES)) {
return FALSE; res = FALSE;
goto done;
}
switch (src_format) { switch (src_format) {
case GST_FORMAT_TIME: case GST_FORMAT_TIME:
@ -363,6 +340,10 @@ gst_avi_demux_src_convert (GstPad * pad,
res = FALSE; res = FALSE;
} }
done:
GST_LOG_OBJECT (avidemux, "Returning res:%d dest_format:%d dest_value:%lld",
res, *dest_format, *dest_value);
gst_object_unref (avidemux);
return res; return res;
} }
@ -475,78 +456,83 @@ gst_avi_demux_handle_src_event (GstPad * pad, GstEvent * event)
{ {
GstFormat format; GstFormat format;
GstSeekFlags flags; GstSeekFlags flags;
gint64 cur, stop; gdouble rate;
gint64 start, stop;
gint64 tstart, tstop;
gint64 duration;
GstFormat tformat = GST_FORMAT_TIME;
GstSeekType start_type, stop_type;
gboolean update_start = TRUE;
gboolean update_stop = TRUE;
gst_event_parse_seek (event, NULL, &format, &flags, NULL, &cur, NULL, gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop); &stop_type, &stop);
GST_DEBUG_OBJECT (avi, "seek format %d, %08x", GST_DEBUG_OBJECT (avi, "seek format %d, %08x, start:%lld, stop:%lld",
format, stream->strh->type); format, stream->strh->type, start, stop);
switch (format) { if (format != GST_FORMAT_TIME) {
case GST_FORMAT_BYTES: res &=
case GST_FORMAT_DEFAULT: gst_avi_demux_src_convert (pad, format, start, &tformat, &tstart);
case GST_FORMAT_TIME:{ res &= gst_avi_demux_src_convert (pad, format, stop, &tformat, &tstop);
gst_avi_index_entry *entry = NULL, *real; if (!res)
gint64 desired_offset = cur; goto done;
guint32 flags; } else {
tstart = start;
tstop = stop;
}
GST_DEBUG_OBJECT (avi, "seeking to %" G_GINT64_FORMAT, duration = (((gfloat) stream->strh->scale) * stream->strh->length /
desired_offset); stream->strh->rate) * GST_SECOND;
flags = GST_RIFF_IF_KEYFRAME; switch (start_type) {
switch (format) { case GST_SEEK_TYPE_CUR:
case GST_FORMAT_BYTES: tstart = avi->segment_start + tstart;
entry = gst_avi_demux_index_entry_for_byte (avi, 0, //stream->num,
desired_offset, flags);
real = gst_avi_demux_index_entry_for_byte (avi, stream->num,
desired_offset, 0);
break;
case GST_FORMAT_DEFAULT:
entry = gst_avi_demux_index_entry_for_frame (avi, 0, //stream->num,
desired_offset, flags);
real = gst_avi_demux_index_entry_for_frame (avi, stream->num,
desired_offset, 0);
break;
case GST_FORMAT_TIME:
entry = gst_avi_demux_index_entry_for_time (avi, 0, //stream->num,
desired_offset, flags);
real = gst_avi_demux_index_entry_for_time (avi, stream->num,
desired_offset, 0);
break;
default:
break;
}
if (!(flags & GST_SEEK_FLAG_ACCURATE))
real = entry;
if (entry) {
avi->seek_offset = entry->offset + avi->index_offset;
avi->last_seek = real->ts;
avi->seek_flush = flags & GST_SEEK_FLAG_FLUSH;
avi->seek_entry = entry->index_nr;
GST_DEBUG_OBJECT (avi, "Will seek to entry %d", avi->seek_entry);
res = gst_avi_demux_handle_seek (avi, real->ts);
} else {
GST_DEBUG_OBJECT (avi, "no index entry found for format=%d value=%"
G_GINT64_FORMAT, format, desired_offset);
res = FALSE;
}
GST_LOG ("seek done");
break; break;
} case GST_SEEK_TYPE_END:
default: tstart = duration + tstart;
res = FALSE; break;
case GST_SEEK_TYPE_NONE:
tstart = avi->segment_start;
update_start = FALSE;
break;
case GST_SEEK_TYPE_SET:
break; break;
} }
tstart = CLAMP (tstart, 0, duration);
switch (stop_type) {
case GST_SEEK_TYPE_CUR:
tstop = avi->segment_stop + tstop;
break;
case GST_SEEK_TYPE_END:
tstop = duration + tstop;
break;
case GST_SEEK_TYPE_NONE:
tstop = avi->segment_stop;
update_stop = FALSE;
break;
case GST_SEEK_TYPE_SET:
break;
}
tstop = CLAMP (tstop, 0, duration);
/* now store the values */
avi->segment_rate = rate;
avi->segment_flags = flags;
avi->segment_start = tstart;
avi->segment_stop = tstop;
gst_avi_demux_handle_seek (avi, update_start || update_stop);
break; break;
} }
default: default:
res = FALSE; res = FALSE;
break; break;
} }
done:
gst_event_unref (event); gst_event_unref (event);
return res; return res;
@ -1850,6 +1836,7 @@ gst_avi_demux_stream_header (GstAviDemux * avi)
switch (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub))) { switch (GST_READ_UINT32_LE (GST_BUFFER_DATA (sub))) {
case GST_RIFF_LIST_strl: case GST_RIFF_LIST_strl:
gst_avi_demux_parse_stream (GST_ELEMENT (avi), sub); gst_avi_demux_parse_stream (GST_ELEMENT (avi), sub);
gst_buffer_unref (sub);
break; break;
case GST_RIFF_LIST_odml: case GST_RIFF_LIST_odml:
gst_avi_demux_parse_odml (GST_ELEMENT (avi), sub); gst_avi_demux_parse_odml (GST_ELEMENT (avi), sub);
@ -1966,11 +1953,12 @@ done:
} }
/* send initial discont */ /* send initial discont */
avi->seek_event = gst_event_new_newsegment (FALSE, 1.0, avi->segment_start = 0;
GST_FORMAT_TIME, (gint64) 0, avi->segment_stop = (gint64) (((gfloat) avi->stream[0].strh->scale) *
(gint64) (((gfloat) avi->stream[0].strh->scale) * avi->stream[0].strh->length / avi->stream[0].strh->rate) * GST_SECOND;
avi->stream[0].strh->length / avi->seek_event = gst_event_new_newsegment
avi->stream[0].strh->rate) * GST_SECOND, 0); (FALSE, avi->segment_rate, GST_FORMAT_TIME,
avi->segment_start, avi->segment_stop, avi->segment_start);
/* at this point we know all the streams and we can signal the no more /* at this point we know all the streams and we can signal the no more
* pads signal */ * pads signal */
@ -1985,25 +1973,71 @@ done:
*/ */
static gboolean static gboolean
gst_avi_demux_handle_seek (GstAviDemux * avi, guint64 time) gst_avi_demux_handle_seek (GstAviDemux * avi, gboolean update)
{ {
GstClockTime start_time;
gboolean flush, keyframe;
guint stream;
gst_avi_index_entry *entry;
/* FIXME: if we seek in an openDML file, we will have multiple /* FIXME: if we seek in an openDML file, we will have multiple
* primary levels. Seeking in between those will cause havoc. */ * primary levels. Seeking in between those will cause havoc. */
GST_LOG ("Seeking to entry %d", avi->seek_entry); flush = avi->segment_flags & GST_SEEK_FLAG_FLUSH;
keyframe = avi->segment_flags & GST_SEEK_FLAG_KEY_UNIT;
gst_avi_demux_send_event (avi, gst_event_new_flush_start ()); if (flush) {
for (stream = avi->num_streams; stream--;)
gst_pad_push_event (avi->stream[stream].pad,
gst_event_new_flush_start ());
gst_pad_push_event (avi->sinkpad, gst_event_new_flush_start ());
} else
gst_pad_pause_task (avi->sinkpad);
GST_STREAM_LOCK (avi->sinkpad); GST_STREAM_LOCK (avi->sinkpad);
avi->last_seek = time; /* fill current_entry according to flags and update */
avi->current_entry = avi->seek_entry; if (update) {
avi->seek_event = gst_event_new_newsegment (FALSE, 1.0, entry = gst_avi_demux_index_entry_for_time (avi, 0, avi->segment_start,
GST_FORMAT_TIME, time, (guint32) GST_RIFF_IF_KEYFRAME);
(gint64) (((gfloat) avi->stream[0].strh->scale) * if (entry) {
avi->stream[0].strh->length / GST_DEBUG_OBJECT (avi,
avi->stream[0].strh->rate) * GST_SECOND, time); "Got keyframe entry %d [stream:%d / ts:%" GST_TIME_FORMAT
gst_avi_demux_send_event (avi, gst_event_new_flush_stop ()); " / duration:%" GST_TIME_FORMAT "]", entry->index_nr,
entry->stream_nr, GST_TIME_ARGS (entry->ts),
GST_TIME_ARGS (entry->dur));
avi->current_entry = entry->index_nr;
} else {
GST_WARNING_OBJECT (avi,
"Couldn't find AviIndexEntry for time:%" GST_TIME_FORMAT,
GST_TIME_ARGS (avi->segment_start));
}
}
GST_DEBUG ("seek: %" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT
" keyframe seeking:%d update:%d", GST_TIME_ARGS (avi->segment_start),
GST_TIME_ARGS (avi->segment_stop), keyframe, update);
if (keyframe)
start_time = avi->index_entries[avi->current_entry].ts;
else
start_time = avi->segment_start;
avi->seek_event = gst_event_new_newsegment
(!update, avi->segment_rate, GST_FORMAT_TIME,
start_time, avi->segment_stop, start_time);
if (flush) {
for (stream = avi->num_streams; stream--;)
gst_pad_push_event (avi->stream[stream].pad, gst_event_new_flush_stop ());
gst_pad_push_event (avi->sinkpad, gst_event_new_flush_stop ());
}
if (avi->segment_flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (avi),
gst_message_new_segment_start (GST_OBJECT (avi), GST_FORMAT_TIME,
start_time));
}
gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop, gst_pad_start_task (avi->sinkpad, (GstTaskFunction) gst_avi_demux_loop,
avi->sinkpad); avi->sinkpad);
@ -2011,6 +2045,7 @@ gst_avi_demux_handle_seek (GstAviDemux * avi, guint64 time)
GST_STREAM_UNLOCK (avi->sinkpad); GST_STREAM_UNLOCK (avi->sinkpad);
return TRUE; return TRUE;
} }
static GstFlowReturn static GstFlowReturn
@ -2020,10 +2055,17 @@ gst_avi_demux_process_next_entry (GstAviDemux * avi)
gboolean processed = FALSE; gboolean processed = FALSE;
do { do {
if (avi->current_entry >= avi->index_size) { if (avi->current_entry >= avi->index_size) {
GST_LOG_OBJECT (avi, "Handled last index entry, setting EOS (%d > %d)", GST_LOG_OBJECT (avi, "Handled last index entry, setting EOS (%d > %d)",
avi->current_entry, avi->index_size); avi->current_entry, avi->index_size);
gst_avi_demux_send_event (avi, gst_event_new_eos ()); if (avi->segment_flags & GST_SEEK_FLAG_SEGMENT)
gst_element_post_message
(GST_ELEMENT (avi),
gst_message_new_segment_done (GST_OBJECT (avi), GST_FORMAT_TIME,
avi->segment_stop));
else
gst_avi_demux_send_event (avi, gst_event_new_eos ());
return GST_FLOW_WRONG_STATE; return GST_FLOW_WRONG_STATE;
} else { } else {
GstBuffer *buf; GstBuffer *buf;
@ -2035,18 +2077,18 @@ gst_avi_demux_process_next_entry (GstAviDemux * avi)
"Entry has non-existing stream nr %d", entry->stream_nr); "Entry has non-existing stream nr %d", entry->stream_nr);
continue; continue;
} }
stream = &avi->stream[entry->stream_nr]; stream = &avi->stream[entry->stream_nr];
if (entry->size == 0 || !stream->pad) { if (entry->size == 0 || !stream->pad) {
GST_DEBUG_OBJECT (avi, "Skipping entry %d (%d, %p)", GST_DEBUG_OBJECT (avi, "Skipping entry %d (%d, %p)",
avi->current_entry - 1, entry->size, stream->pad); avi->current_entry - 1, entry->size, stream->pad);
goto next; goto next;
} else if (GST_CLOCK_TIME_IS_VALID (avi->last_seek)) { } else if (GST_CLOCK_TIME_IS_VALID (avi->segment_start)) {
if (stream->strh->type != GST_RIFF_FCC_vids && if (stream->strh->type != GST_RIFF_FCC_vids &&
entry->ts < avi->last_seek) { entry->ts < avi->segment_start) {
GST_DEBUG_OBJECT (avi, "Doing keyframe sync"); GST_DEBUG_OBJECT (avi, "Doing keyframe sync");
goto next; goto next;
} else if (entry->ts >= avi->last_seek) {
avi->last_seek = GST_CLOCK_TIME_NONE;
} }
} }
@ -2084,14 +2126,6 @@ gst_avi_demux_process_next_entry (GstAviDemux * avi)
static GstFlowReturn static GstFlowReturn
gst_avi_demux_stream_data (GstAviDemux * avi) gst_avi_demux_stream_data (GstAviDemux * avi)
{ {
#if 0
if (avi->seek_offset != (guint64) - 1) {
if (!gst_avi_demux_handle_seek (avi))
return FALSE;
avi->seek_offset = (guint64) - 1;
}
#endif
/* if we have a avi->index_entries[], we don't want to read /* if we have a avi->index_entries[], we don't want to read
* the stream linearly, but seek to the next ts/index_entry. */ * the stream linearly, but seek to the next ts/index_entry. */
//if (avi->index_entries != NULL) { //if (avi->index_entries != NULL) {
@ -2190,7 +2224,16 @@ gst_avi_demux_loop (GstPad * pad)
pause: pause:
GST_LOG_OBJECT (avi, "pausing task"); GST_LOG_OBJECT (avi, "pausing task");
gst_pad_pause_task (avi->sinkpad); gst_pad_pause_task (avi->sinkpad);
return; if (GST_FLOW_IS_FATAL (res)) {
guint stream = avi->num_streams;
/* for fatal errors we post an error message */
GST_ELEMENT_ERROR (avi, STREAM, FAILED,
(_("Internal data stream error.")),
("streaming stopped, reason %s", gst_flow_get_name (res)));
while (stream--)
gst_pad_push_event (avi->stream[stream].pad, gst_event_new_eos ());
}
} }
static gboolean static gboolean

9
gst/avi/gstavidemux.h
View file

@ -116,10 +116,11 @@ typedef struct _GstAviDemux {
gst_riff_avih *avih; gst_riff_avih *avih;
/* seeking */ /* seeking */
guint64 seek_offset; gdouble segment_rate;
guint64 last_seek; GstSeekFlags segment_flags;
gint seek_entry; /* in GST_FORMAT_TIME */
gboolean seek_flush; gint64 segment_start;
gint64 segment_stop;
GstEvent *seek_event; GstEvent *seek_event;
} GstAviDemux; } GstAviDemux;