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ext/ffmpeg/gstffmpegdec.c: Add basic reverse playback for video.

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Original commit message from CVS:
* ext/ffmpeg/gstffmpegdec.c: (clear_queued), (flush_queued),
(gst_ffmpegdec_video_frame), (gst_ffmpegdec_frame),
(gst_ffmpegdec_sink_event), (gst_ffmpegdec_change_state):
Add basic reverse playback for video.
This commit is contained in:
Wim Taymans 2008-01-16 17:35:58 +00:00
parent df28e0bdb6
commit 6033df76e9
3 changed files with 67 additions and 18 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
2008-01-16 Wim Taymans <wim.taymans@collabora.co.uk>
* ext/ffmpeg/gstffmpegdec.c: (clear_queued), (flush_queued),
(gst_ffmpegdec_video_frame), (gst_ffmpegdec_frame),
(gst_ffmpegdec_sink_event), (gst_ffmpegdec_change_state):
Add basic reverse playback for video.
2008-01-10 Sebastian Dröge <slomo@circular-chaos.org>
* autogen.sh:

2
common

@ -1 +1 @@
Subproject commit 49c2fc5c9bff0e9858e89978bd98164a386de51d
Subproject commit 0efbab89d333b5d07cc7da1a501c38edf5bb4f72

76
ext/ffmpeg/gstffmpegdec.c
View file

@ -95,6 +95,9 @@ struct _GstFFMpegDec
GstClockTime dur1, dur2;
gboolean is_realvideo;
/* reverse playback queue */
GList *queued;
};
typedef struct _GstFFMpegDecClass GstFFMpegDecClass;
@ -1292,6 +1295,35 @@ alloc_failed:
}
}
static void
clear_queued (GstFFMpegDec *ffmpegdec)
{
g_list_foreach (ffmpegdec->queued, (GFunc) gst_mini_object_unref, NULL);
g_list_free (ffmpegdec->queued);
ffmpegdec->queued = NULL;
}
static GstFlowReturn
flush_queued (GstFFMpegDec *ffmpegdec)
{
GstFlowReturn res = GST_FLOW_OK;
while (ffmpegdec->queued) {
GstBuffer *buf = GST_BUFFER_CAST (ffmpegdec->queued->data);
GST_LOG_OBJECT (ffmpegdec, "pushing buffer %p, timestamp %"
GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT, buf,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
/* iterate ouput queue an push downstream */
res = gst_pad_push (ffmpegdec->srcpad, buf);
ffmpegdec->queued = g_list_delete_link (ffmpegdec->queued, ffmpegdec->queued);
}
return res;
}
/* gst_ffmpegdec_[video|audio]_frame:
* ffmpegdec:
* data: pointer to the data to decode
@ -1304,7 +1336,6 @@ alloc_failed:
* Returns: number of bytes used in decoding. The check for successful decode is
* outbuf being non-NULL.
*/
static gint
gst_ffmpegdec_video_frame (GstFFMpegDec * ffmpegdec,
guint8 * data, guint size,
@ -1378,6 +1409,10 @@ gst_ffmpegdec_video_frame (GstFFMpegDec * ffmpegdec,
/* check if we are dealing with a keyframe here */
iskeyframe = check_keyframe (ffmpegdec);
if (iskeyframe) {
*ret = flush_queued (ffmpegdec);
}
/* when we're waiting for a keyframe, see if we have one or drop the current
* non-keyframe */
if (G_UNLIKELY (ffmpegdec->waiting_for_key)) {
@ -1682,7 +1717,6 @@ clipped:
}
}
/* gst_ffmpegdec_frame:
* ffmpegdec:
* data: pointer to the data to decode
@ -1765,8 +1799,17 @@ gst_ffmpegdec_frame (GstFFMpegDec * ffmpegdec,
}
/* set caps */
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (ffmpegdec->srcpad));
/* and off we go */
*ret = gst_pad_push (ffmpegdec->srcpad, outbuf);
if (ffmpegdec->segment.rate > 0.0) {
/* and off we go */
*ret = gst_pad_push (ffmpegdec->srcpad, outbuf);
}
else {
/* reverse playback, queue frame till later */
GST_DEBUG_OBJECT (ffmpegdec, "queued frame");
ffmpegdec->queued = g_list_prepend (ffmpegdec->queued, outbuf);
*ret = GST_FLOW_OK;
}
} else {
GST_DEBUG_OBJECT (ffmpegdec, "We didn't get a decoded buffer");
}
@ -1813,7 +1856,8 @@ gst_ffmpegdec_sink_event (GstPad * pad, GstEvent * event)
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:{
case GST_EVENT_EOS:
{
if (oclass->in_plugin->capabilities & CODEC_CAP_DELAY) {
gint have_data, len, try = 0;
@ -1829,9 +1873,14 @@ gst_ffmpegdec_sink_event (GstPad * pad, GstEvent * event)
break;
} while (try++ < 10);
}
if (ffmpegdec->segment.rate < 0.0) {
/* if we have some queued frames for reverse playback, flush them now */
flush_queued (ffmpegdec);
}
break;
}
case GST_EVENT_FLUSH_STOP:{
case GST_EVENT_FLUSH_STOP:
{
if (ffmpegdec->opened) {
avcodec_flush_buffers (ffmpegdec->context);
}
@ -1842,9 +1891,11 @@ gst_ffmpegdec_sink_event (GstPad * pad, GstEvent * event)
gst_segment_init (&ffmpegdec->segment, GST_FORMAT_TIME);
ffmpegdec->tstamp1 = ffmpegdec->tstamp2 = GST_CLOCK_TIME_NONE;
ffmpegdec->dur1 = ffmpegdec->dur2 = GST_CLOCK_TIME_NONE;
clear_queued (ffmpegdec);
break;
}
case GST_EVENT_NEWSEGMENT:{
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
GstFormat fmt;
gint64 start, stop, time;
@ -1853,10 +1904,6 @@ gst_ffmpegdec_sink_event (GstPad * pad, GstEvent * event)
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &fmt,
&start, &stop, &time);
/* no negative rates for now */
if (rate <= 0.0)
goto newseg_wrong_rate;
switch (fmt) {
case GST_FORMAT_TIME:
/* fine, our native segment format */
@ -1920,12 +1967,6 @@ done:
return ret;
/* ERRORS */
newseg_wrong_rate:
{
GST_WARNING_OBJECT (ffmpegdec, "negative rates not supported yet");
gst_event_unref (event);
goto done;
}
no_bitrate:
{
GST_WARNING_OBJECT (ffmpegdec, "no bitrate to convert BYTES to TIME");
@ -2179,6 +2220,7 @@ gst_ffmpegdec_change_state (GstElement * element, GstStateChange transition)
ffmpegdec->last_buffer = NULL;
}
GST_OBJECT_UNLOCK (ffmpegdec);
clear_queued (ffmpegdec);
break;
default:
break;