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ext/mpeg2dec/gstmpeg2dec.*: The libmpeg2 user-allocated buffer management is awkward, to say the least. Hopefully thi...

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Original commit message from CVS:
* ext/mpeg2dec/gstmpeg2dec.c: (gst_mpeg2dec_open_decoder),
(gst_mpeg2dec_reset), (free_all_buffers),
(gst_mpeg2dec_alloc_buffer), (handle_sequence):
* ext/mpeg2dec/gstmpeg2dec.h:
The libmpeg2 user-allocated buffer management is awkward,
to say the least. Hopefully this fixes things.
This commit is contained in:
Jan Schmidt 2005-02-05 07:36:01 +00:00
parent 37bed70fca
commit 45a0fee92b
3 changed files with 82 additions and 35 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2005-02-05 Jan Schmidt <thaytan@mad.scientist.com>
* ext/mpeg2dec/gstmpeg2dec.c: (gst_mpeg2dec_open_decoder),
(gst_mpeg2dec_reset), (free_all_buffers),
(gst_mpeg2dec_alloc_buffer), (handle_sequence):
* ext/mpeg2dec/gstmpeg2dec.h:
The libmpeg2 user-allocated buffer management is awkward,
to say the least. Hopefully this fixes things.
2005-02-04 Andy Wingo <wingo@pobox.com>
* gst/audioconvert/bufferframesconvert.c

107
ext/mpeg2dec/gstmpeg2dec.c
View file

@ -149,6 +149,7 @@ static void gst_mpeg2dec_class_init (GstMpeg2decClass * klass);
static void gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec);
static void gst_mpeg2dec_dispose (GObject * object);
static void gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec);
static void gst_mpeg2dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
@ -317,6 +318,7 @@ gst_mpeg2dec_open_decoder (GstMpeg2dec * mpeg2dec)
mpeg2dec->decoder = mpeg2_init ();
mpeg2dec->closed = FALSE;
mpeg2dec->have_fbuf = FALSE;
mpeg2_custom_fbuf (mpeg2dec->decoder, 1);
}
static void
@ -329,6 +331,20 @@ gst_mpeg2dec_dispose (GObject * object)
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec)
{
/* reset the initial video state */
mpeg2dec->format = MPEG2DEC_FORMAT_NONE;
mpeg2dec->width = -1;
mpeg2dec->height = -1;
mpeg2dec->segment_start = 0;
mpeg2dec->segment_end = -1;
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
mpeg2dec->frame_period = 0;
gst_mpeg2dec_open_decoder (mpeg2dec);
mpeg2dec->need_sequence = TRUE;
}
static void
gst_mpeg2dec_set_index (GstElement * element, GstIndex * index)
{
@ -398,6 +414,8 @@ free_all_buffers (GstMpeg2dec * mpeg2dec)
for (i = 0; i < GST_MPEG2DEC_NUM_BUFS; i++) {
if (mpeg2dec->buffers[i] != NULL) {
GST_DEBUG_OBJECT (mpeg2dec, "free_all Releasing %p at slot %d",
mpeg2dec->buffers[i], i);
gst_buffer_unref (mpeg2dec->buffers[i]);
mpeg2dec->buffers[i] = NULL;
}
@ -518,8 +536,13 @@ gst_mpeg2dec_alloc_buffer (GstMpeg2dec * mpeg2dec, gint64 offset)
}
if (!put_buffer (mpeg2dec, outbuf)) {
#if 0
GST_ELEMENT_ERROR (mpeg2dec, LIBRARY, TOO_LAZY, (NULL),
("No free slot. libmpeg2 did not discard buffers."));
#else
GST_WARNING_OBJECT (mpeg2dec,
"No free slot. libmpeg2 did not discard buffers.");
#endif
return NULL;
}
@ -624,13 +647,11 @@ handle_sequence (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
return FALSE;
}
if (!mpeg2dec->have_fbuf) {
/* alloc 2 buffers */
if (!gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset) ||
!gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset))
return FALSE;
mpeg2dec->have_fbuf = TRUE;
}
free_all_buffers (mpeg2dec);
if (!gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset) ||
!gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset) ||
!gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset))
return FALSE;
mpeg2dec->need_sequence = FALSE;
@ -848,22 +869,36 @@ gst_mpeg2dec_flush_decoder (GstMpeg2dec * mpeg2dec)
do {
state = mpeg2_parse (mpeg2dec->decoder);
switch (state) {
case STATE_SEQUENCE:
if (!handle_sequence (mpeg2dec, info)) {
gst_mpeg2dec_close_decoder (mpeg2dec);
gst_mpeg2dec_open_decoder (mpeg2dec);
state = -1;
}
break;
case STATE_PICTURE:
if (!handle_picture (mpeg2dec, info)) {
gst_mpeg2dec_close_decoder (mpeg2dec);
gst_mpeg2dec_open_decoder (mpeg2dec);
state = -1;
break;
}
mpeg2_skip (mpeg2dec->decoder, 1);
break;
case STATE_END:
#if MPEG2_RELEASE >= MPEG2_VERSION (0, 4, 0)
case STATE_INVALID_END:
#endif
// mpeg2dec->need_sequence = TRUE;
case STATE_SLICE:
if (info->discard_fbuf && info->discard_fbuf->id) {
if (info->discard_fbuf) {
if (free_buffer (mpeg2dec, GST_BUFFER (info->discard_fbuf->id))) {
GST_DEBUG_OBJECT (mpeg2dec, "Discarded buffer %p",
info->discard_fbuf->id);
} else {
GST_ELEMENT_ERROR (mpeg2dec, LIBRARY, TOO_LAZY, (NULL),
("libmpeg2 reported invalid buffer %p",
info->discard_fbuf->id));
("libmpeg2 reported invalid buffer %p, fbuf: %p",
info->discard_fbuf->id, info->discard_fbuf));
}
}
break;
@ -880,6 +915,13 @@ gst_mpeg2dec_flush_decoder (GstMpeg2dec * mpeg2dec)
}
}
while (state != STATE_BUFFER && state != -1);
#if MPEG2_RELEASE >= MPEG2_VERSION(0,4,0)
GST_DEBUG_OBJECT (mpeg2dec, "resetting mpeg2 stream decoder");
/* 0 starts at next picture, 1 at next sequence header */
mpeg2_reset (mpeg2dec->decoder, 0);
#endif
}
}
@ -915,8 +957,13 @@ gst_mpeg2dec_chain (GstPad * pad, GstData * _data)
GST_TIME_ARGS (mpeg2dec->next_time));
}
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
gst_mpeg2dec_flush_decoder (mpeg2dec);
if (GST_EVENT_DISCONT_NEW_MEDIA (event)) {
gst_mpeg2dec_reset (mpeg2dec);
} else {
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
gst_mpeg2dec_flush_decoder (mpeg2dec);
}
gst_pad_event_default (pad, event);
return;
}
@ -979,7 +1026,6 @@ gst_mpeg2dec_chain (GstPad * pad, GstData * _data)
switch (state) {
case STATE_SEQUENCE:
if (!handle_sequence (mpeg2dec, info)) {
gst_mpeg2dec_flush_decoder (mpeg2dec);
goto exit;
}
@ -999,7 +1045,6 @@ gst_mpeg2dec_chain (GstPad * pad, GstData * _data)
case STATE_PICTURE:
{
if (!handle_picture (mpeg2dec, info)) {
gst_mpeg2dec_flush_decoder (mpeg2dec);
goto exit;
}
break;
@ -1018,11 +1063,8 @@ gst_mpeg2dec_chain (GstPad * pad, GstData * _data)
mpeg2dec->need_sequence = TRUE;
case STATE_SLICE:
if (!handle_slice (mpeg2dec, info)) {
gst_mpeg2dec_flush_decoder (mpeg2dec);
goto exit;
}
if (state != STATE_SLICE)
gst_mpeg2dec_flush_decoder (mpeg2dec);
break;
case STATE_BUFFER:
@ -1033,11 +1075,6 @@ gst_mpeg2dec_chain (GstPad * pad, GstData * _data)
/* error */
case STATE_INVALID:
GST_WARNING_OBJECT (mpeg2dec, "Decoding error");
/*
* We need to close the decoder here, according to docs
*/
gst_mpeg2dec_close_decoder (mpeg2dec);
gst_mpeg2dec_open_decoder (mpeg2dec);
goto exit;
break;
@ -1061,7 +1098,16 @@ gst_mpeg2dec_chain (GstPad * pad, GstData * _data)
}
#endif
}
gst_buffer_unref (buf);
return;
exit:
/*
* Close and reopen the decoder, because
* something went pretty wrong
*/
gst_mpeg2dec_close_decoder (mpeg2dec);
gst_mpeg2dec_open_decoder (mpeg2dec);
gst_buffer_unref (buf);
}
@ -1331,8 +1377,9 @@ index_seek (GstPad * pad, GstEvent * event)
/* do the seek */
if (gst_pad_send_event (GST_PAD_PEER (mpeg2dec->sinkpad), seek_event)) {
/* seek worked, we're done, loop will exit */
gst_mpeg2dec_flush_decoder (mpeg2dec);
#if 0
mpeg2dec->segment_start = GST_EVENT_SEEK_OFFSET (event);
#endif
return TRUE;
}
}
@ -1390,7 +1437,9 @@ normal_seek (GstPad * pad, GstEvent * event)
/* do the seekk */
if (gst_pad_send_event (GST_PAD_PEER (mpeg2dec->sinkpad), seek_event)) {
/* seek worked, we're done, loop will exit */
#if 0
mpeg2dec->segment_start = GST_EVENT_SEEK_OFFSET (event);
#endif
res = TRUE;
break;
}
@ -1461,16 +1510,7 @@ gst_mpeg2dec_change_state (GstElement * element)
{
mpeg2dec->next_time = 0;
/* reset the initial video state */
mpeg2dec->format = MPEG2DEC_FORMAT_NONE;
mpeg2dec->width = -1;
mpeg2dec->height = -1;
mpeg2dec->segment_start = 0;
mpeg2dec->segment_end = -1;
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
mpeg2dec->frame_period = 0;
gst_mpeg2dec_open_decoder (mpeg2dec);
mpeg2dec->need_sequence = TRUE;
gst_mpeg2dec_reset (mpeg2dec);
break;
}
case GST_STATE_PAUSED_TO_PLAYING:
@ -1478,7 +1518,6 @@ gst_mpeg2dec_change_state (GstElement * element)
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
gst_mpeg2dec_flush_decoder (mpeg2dec);
gst_mpeg2dec_close_decoder (mpeg2dec);
break;
case GST_STATE_READY_TO_NULL:

2
ext/mpeg2dec/gstmpeg2dec.h
View file

@ -41,7 +41,7 @@ G_BEGIN_DECLS
#define MPEG_TIME_TO_GST_TIME(time) (((time) * (GST_MSECOND/10)) / 9LL)
#define GST_TIME_TO_MPEG_TIME(time) (((time) * 9LL) / (GST_MSECOND/10))
#define GST_MPEG2DEC_NUM_BUFS 3
#define GST_MPEG2DEC_NUM_BUFS 6
typedef struct _GstMpeg2dec GstMpeg2dec;
typedef struct _GstMpeg2decClass GstMpeg2decClass;