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gstffmpegdec: Handle out-of-order frames. Fixes #580796

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Vanista 2009-05-13 12:37:42 +02:00 committed by Edward Hervey
parent e2dd913f4c
commit a26b94d92c
1 changed files with 136 additions and 11 deletions
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147
ext/ffmpeg/gstffmpegdec.c
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@ -40,6 +40,33 @@
/* define to enable alternative buffer refcounting algorithm */
#undef EXTRA_REF
#define TS_MAP_COUNT 0xFF
#define TS_MAP_INC(ind) ind = (ind + 1) & TS_MAP_COUNT
typedef struct _GstTSMap GstTSMap;
struct _GstTSMap
{
/* timestamp */
guint64 ts;
/* buffer size */
gint size;
};
typedef struct _GstTSHandler GstTSHandler;
struct _GstTSHandler
{
/* ts list indexes */
gint buf_head;
gint buf_tail;
guint64 buf_count;
/* incomming buffer timestamp tracking */
GstTSMap buffers[TS_MAP_COUNT + 1];
};
typedef struct _GstFFMpegDec GstFFMpegDec;
struct _GstFFMpegDec
@ -110,6 +137,8 @@ struct _GstFFMpegDec
gboolean is_realvideo;
GstTSHandler ts_handler;
/* reverse playback queue */
GList *queued;
@ -195,6 +224,12 @@ static int gst_ffmpegdec_get_buffer (AVCodecContext * context,
static void gst_ffmpegdec_release_buffer (AVCodecContext * context,
AVFrame * picture);
static void gst_ts_handler_init (GstFFMpegDec * ffmpegdec);
static void gst_ts_handler_append (GstFFMpegDec * ffmpegdec,
GstBuffer * buffer);
static void gst_ts_handler_consume (GstFFMpegDec * ffmpegdec, gint size);
static guint64 gst_ts_handler_get_ts (GstFFMpegDec * ffmpegdec);
#define GST_FFDEC_PARAMS_QDATA g_quark_from_static_string("ffdec-params")
static GstElementClass *parent_class = NULL;
@ -369,6 +404,8 @@ gst_ffmpegdec_init (GstFFMpegDec * ffmpegdec)
ffmpegdec->debug_mv = DEFAULT_DEBUG_MV;
ffmpegdec->crop = DEFAULT_CROP;
gst_ts_handler_init (ffmpegdec);
ffmpegdec->format.video.fps_n = -1;
ffmpegdec->format.video.old_fps_n = -1;
gst_segment_init (&ffmpegdec->segment, GST_FORMAT_TIME);
@ -1542,10 +1579,18 @@ gst_ffmpegdec_video_frame (GstFFMpegDec * ffmpegdec,
ffmpegdec->context->hurry_up = 2;
}
ffmpegdec->context->reordered_opaque = gst_ts_handler_get_ts (ffmpegdec);
/* now decode the frame */
len = avcodec_decode_video (ffmpegdec->context,
ffmpegdec->picture, &have_data, data, size);
gst_ts_handler_consume (ffmpegdec, len);
if (have_data) {
/* recuperate the reordered timestamp */
in_timestamp = ffmpegdec->picture->reordered_opaque;
}
/* restore previous state */
if (!decode)
ffmpegdec->context->hurry_up = hurry_up;
@ -1648,22 +1693,20 @@ gst_ffmpegdec_video_frame (GstFFMpegDec * ffmpegdec,
* 3) else copy input timestamp
*/
out_timestamp = -1;
if (out_pts != -1) {
if (GST_CLOCK_TIME_IS_VALID (in_timestamp)) {
out_timestamp = in_timestamp;
GST_LOG_OBJECT (ffmpegdec, "using in timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (out_timestamp));
} else if (GST_CLOCK_TIME_IS_VALID (ffmpegdec->next_ts)) {
out_timestamp = ffmpegdec->next_ts;
GST_LOG_OBJECT (ffmpegdec, "using next timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (out_timestamp));
} else if (out_pts != -1) {
/* Get (interpolated) timestamp from FFMPEG */
out_timestamp = (GstClockTime) out_pts;
GST_LOG_OBJECT (ffmpegdec, "using timestamp %" GST_TIME_FORMAT
" returned by ffmpeg", GST_TIME_ARGS (out_timestamp));
}
if (!GST_CLOCK_TIME_IS_VALID (out_timestamp) && ffmpegdec->next_ts != -1) {
out_timestamp = ffmpegdec->next_ts;
GST_LOG_OBJECT (ffmpegdec, "using next timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (out_timestamp));
}
if (!GST_CLOCK_TIME_IS_VALID (out_timestamp)) {
out_timestamp = in_timestamp;
GST_LOG_OBJECT (ffmpegdec, "using in timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (out_timestamp));
}
GST_BUFFER_TIMESTAMP (*outbuf) = out_timestamp;
/*
@ -1724,6 +1767,8 @@ gst_ffmpegdec_video_frame (GstFFMpegDec * ffmpegdec,
if (out_timestamp != -1 && out_duration != -1)
ffmpegdec->next_ts = out_timestamp + out_duration;
else
ffmpegdec->next_ts = GST_CLOCK_TIME_NONE;
/* palette is not part of raw video frame in gst and the size
* of the outgoing buffer needs to be adjusted accordingly */
@ -2270,6 +2315,9 @@ gst_ffmpegdec_chain (GstPad * pad, GstBuffer * inbuf)
* interpollation can work. */
ffmpegdec->clear_ts = TRUE;
/* append the unaltered buffer timestamp to list */
gst_ts_handler_append (ffmpegdec, inbuf);
oclass = (GstFFMpegDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
/* do early keyframe check pretty bad to rely on the keyframe flag in the
@ -2758,3 +2806,80 @@ gst_ffmpegdec_register (GstPlugin * plugin)
return TRUE;
}
/** initialize the timestamp handler */
static void
gst_ts_handler_init (GstFFMpegDec * ffmpegdec)
{
GstTSHandler *ts_handler = &ffmpegdec->ts_handler;
memset (ts_handler, 0, sizeof (GstTSHandler));
ts_handler->buf_tail = 1;
}
/** add a new entry to the list from a GstBuffer */
static void
gst_ts_handler_append (GstFFMpegDec * ffmpegdec, GstBuffer * buffer)
{
GstTSHandler *ts_handler = &ffmpegdec->ts_handler;
guint64 ts = GST_BUFFER_TIMESTAMP (buffer);
gint size = GST_BUFFER_SIZE (buffer);
gint ind = ts_handler->buf_head;
if ((ts != -1) || (!ts && !ts_handler->buf_count)) {
/* null timestamps are only valid for the first entry */
TS_MAP_INC (ind);
/** debugging trace
printf ("app [%02X] %4d\t%6.3f\t%8d\n",
ind, ts_handler->buf_count,
ts != -1 ? (double) ts / GST_SECOND : -1.0, size);
**/
ts_handler->buffers[ind].ts = ts;
ts_handler->buffers[ind].size = size;
ts_handler->buf_head = ind;
ts_handler->buf_count++;
} else {
/* append size to existing entry */
ts_handler->buffers[ind].size += size;
}
}
/** indicate that the decoder has consumed some data */
static void
gst_ts_handler_consume (GstFFMpegDec * ffmpegdec, gint size)
{
GstTSHandler *ts_handler = &ffmpegdec->ts_handler;
gint buf = ts_handler->buf_tail;
/* eat some bytes from the buffer map */
while (size > 0) {
if (size >= ts_handler->buffers[buf].size) {
size -= ts_handler->buffers[buf].size;
/* reset this entry */
memset (ts_handler->buffers + buf, -1, sizeof (GstTSMap));
TS_MAP_INC (buf);
/* update the buffer tail */
ts_handler->buf_tail = buf;
} else {
ts_handler->buffers[buf].size -= size;
size = 0;
}
}
if (size == -1) {
/* just consume the one buffer regardless */
memset (ts_handler->buffers + buf, -1, sizeof (GstTSMap));
TS_MAP_INC (buf);
/* update the buffer tail */
ts_handler->buf_tail = buf;
size = 0;
}
}
/** get the timestamp from the tail of the list */
static guint64
gst_ts_handler_get_ts (GstFFMpegDec * ffmpegdec)
{
GstTSHandler *ts_handler = &ffmpegdec->ts_handler;
guint64 ts = ts_handler->buffers[ts_handler->buf_tail].ts;
ts_handler->buffers[ts_handler->buf_tail].ts = -1;
return ts;
}