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gstreamer/gst-libs/gst/video/gstvideodecoder.c
Tim-Philipp Müller c1bc70300d docs: fix up video decoder/encoder docs a bit 
Makes gtk-doc happy.
2012-05-16 12:40:07 +01:00

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/* GStreamer
* Copyright (C) 2008 David Schleef <ds@schleef.org>
* Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
* Copyright (C) 2011 Nokia Corporation. All rights reserved.
* Contact: Stefan Kost <stefan.kost@nokia.com>
* Copyright (C) 2012 Collabora Ltd.
* Author : Edward Hervey <edward@collabora.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstvideodecoder
* @short_description: Base class for video decoders
* @see_also:
*
* This base class is for video decoders turning encoded data into raw video
* frames.
*
* GstVideoDecoder and subclass should cooperate as follows.
* <orderedlist>
* <listitem>
* <itemizedlist><title>Configuration</title>
* <listitem><para>
* Initially, GstVideoDecoder calls @start when the decoder element
* is activated, which allows subclass to perform any global setup.
* </para></listitem>
* <listitem><para>
* GstVideoDecoder calls @set_format to inform subclass of caps
* describing input video data that it is about to receive, including
* possibly configuration data.
* While unlikely, it might be called more than once, if changing input
* parameters require reconfiguration.
* </para></listitem>
* <listitem><para>
* GstVideoDecoder calls @stop at end of all processing.
* </para></listitem>
* </itemizedlist>
* </listitem>
* <listitem>
* <itemizedlist>
* <title>Data processing</title>
* <listitem><para>
* Base class gathers input data, and optionally allows subclass
* to parse this into subsequently manageable chunks, typically
* corresponding to and referred to as 'frames'.
* </para></listitem>
* <listitem><para>
* Input frame is provided to subclass' @handle_frame. The ownership of
* the frame is given to @handle_frame.
* </para></listitem>
* <listitem><para>
* If codec processing results in decoded data, subclass should call
* @gst_video_decoder_finish_frame to have decoded data pushed.
* downstream.
* </para></listitem>
* </itemizedlist>
* </listitem>
* <listitem>
* <itemizedlist><title>Shutdown phase</title>
* <listitem><para>
* GstVideoDecoder class calls @stop to inform the subclass that data
* parsing will be stopped.
* </para></listitem>
* </itemizedlist>
* </listitem>
* </orderedlist>
*
* Subclass is responsible for providing pad template caps for
* source and sink pads. The pads need to be named "sink" and "src". It also
* needs to set the fixed caps on srcpad, when the format is ensured. This
* is typically when base class calls subclass' @set_format function, though
* it might be delayed until calling @gst_video_decoder_finish_frame.
*
* Subclass is also responsible for providing (presentation) timestamps
* (likely based on corresponding input ones). If that is not applicable
* or possible, baseclass provides limited framerate based interpolation.
*
* Similarly, the baseclass provides some limited (legacy) seeking support
* (upon explicit subclass request), as full-fledged support
* should rather be left to upstream demuxer, parser or alike. This simple
* approach caters for seeking and duration reporting using estimated input
* bitrates.
*
* Baseclass provides some support for reverse playback, in particular
* in case incoming data is not packetized or upstream does not provide
* fragments on keyframe boundaries. However, subclass should then be prepared
* for the parsing and frame processing stage to occur separately (rather
* than otherwise the latter immediately following the former),
* and should ensure the parsing stage properly marks keyframes or rely on
* upstream to do so properly for incoming data.
*
* Things that subclass need to take care of:
* <itemizedlist>
* <listitem><para>Provide pad templates</para></listitem>
* <listitem><para>
* Set source pad caps when appropriate
* </para></listitem>
* <listitem><para>
* Configure some baseclass behaviour parameters.
* </para></listitem>
* <listitem><para>
* Optionally parse input data, if it is not considered packetized.
* Data will be provided to @parse which should invoke @gst_video_decoder_add_to_frame and
* @gst_video_decoder_have_frame as appropriate.
* </para></listitem>
* <listitem><para>
* Accept data in @handle_frame and provide decoded results to
* @gst_video_decoder_finish_frame.
* </para></listitem>
* </itemizedlist>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* TODO
*
* * Add a flag/boolean for I-frame-only/image decoders so we can do extra
* features, like applying QoS on input (as opposed to after the frame is
* decoded).
* * Add a flag/boolean for decoders that require keyframes, so the base
* class can automatically discard non-keyframes before one has arrived
* * Detect reordered frame/timestamps and fix the pts/dts
* * Support for GstIndex (or shall we not care ?)
* * Calculate actual latency based on input/output timestamp/frame_number
* and if it exceeds the recorded one, save it and emit a GST_MESSAGE_LATENCY
* * Emit latency message when it changes
*
*/
#include "gstvideodecoder.h"
#include "gstvideoutils.h"
#include <gst/video/gstvideopool.h>
#include <gst/video/gstvideometa.h>
#include <string.h>
GST_DEBUG_CATEGORY (videodecoder_debug);
#define GST_CAT_DEFAULT videodecoder_debug
#define GST_VIDEO_DECODER_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_VIDEO_DECODER, \
GstVideoDecoderPrivate))
struct _GstVideoDecoderPrivate
{
/* FIXME introduce a context ? */
GstBufferPool *pool;
GstAllocator *allocator;
GstAllocationParams params;
/* parse tracking */
/* input data */
GstAdapter *input_adapter;
/* assembles current frame */
GstAdapter *output_adapter;
/* Whether we attempt to convert newsegment from bytes to
* time using a bitrate estimation */
gboolean do_estimate_rate;
/* Whether input is considered packetized or not */
gboolean packetized;
/* Error handling */
gint max_errors;
gint error_count;
/* ... being tracked here;
* only available during parsing */
GstVideoCodecFrame *current_frame;
/* events that should apply to the current frame */
GList *current_frame_events;
/* relative offset of input data */
guint64 input_offset;
/* relative offset of frame */
guint64 frame_offset;
/* tracking ts and offsets */
GList *timestamps;
/* combine to yield (presentation) ts */
GstClockTime timestamp_offset;
/* last outgoing ts */
GstClockTime last_timestamp;
/* reverse playback */
/* collect input */
GList *gather;
/* to-be-parsed */
GList *parse;
/* collected parsed frames */
GList *parse_gather;
/* frames to be handled == decoded */
GList *decode;
/* collected output */
GList *queued;
/* Used internally for avoiding processing of frames to flush */
gboolean process;
/* FIXME : base_picture_number is never set */
guint64 base_picture_number;
/* FIXME : reorder_depth is never set */
int reorder_depth;
int distance_from_sync;
guint64 system_frame_number;
guint64 decode_frame_number;
GList *frames; /* Protected with OBJECT_LOCK */
GstVideoCodecState *input_state;
GstVideoCodecState *output_state;
gboolean output_state_changed;
/* QoS properties */
gdouble proportion;
GstClockTime earliest_time;
gboolean discont;
/* qos messages: frames dropped/processed */
guint dropped;
guint processed;
/* Outgoing byte size ? */
gint64 bytes_out;
gint64 time;
gint64 min_latency;
gint64 max_latency;
};
static GstElementClass *parent_class = NULL;
static void gst_video_decoder_class_init (GstVideoDecoderClass * klass);
static void gst_video_decoder_init (GstVideoDecoder * dec,
GstVideoDecoderClass * klass);
static void gst_video_decoder_finalize (GObject * object);
static gboolean gst_video_decoder_setcaps (GstVideoDecoder * dec,
GstCaps * caps);
static gboolean gst_video_decoder_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_video_decoder_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstFlowReturn gst_video_decoder_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_video_decoder_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstStateChangeReturn gst_video_decoder_change_state (GstElement *
element, GstStateChange transition);
static gboolean gst_video_decoder_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static void gst_video_decoder_reset (GstVideoDecoder * decoder, gboolean full);
static GstFlowReturn gst_video_decoder_have_frame_2 (GstVideoDecoder * decoder);
static gboolean gst_video_decoder_set_src_caps (GstVideoDecoder * decoder);
static guint64
gst_video_decoder_get_timestamp (GstVideoDecoder * decoder, int picture_number);
static guint64 gst_video_decoder_get_frame_duration (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static GstVideoCodecFrame *gst_video_decoder_new_frame (GstVideoDecoder *
decoder);
static void gst_video_decoder_clear_queues (GstVideoDecoder * dec);
static gboolean gst_video_decoder_sink_event_default (GstVideoDecoder * decoder,
GstEvent * event);
static gboolean gst_video_decoder_src_event_default (GstVideoDecoder * decoder,
GstEvent * event);
static gboolean gst_video_decoder_decide_allocation_default (GstVideoDecoder *
decoder, GstQuery * query);
/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
* method to get to the padtemplates */
GType
gst_video_decoder_get_type (void)
{
static volatile gsize type = 0;
if (g_once_init_enter (&type)) {
GType _type;
static const GTypeInfo info = {
sizeof (GstVideoDecoderClass),
NULL,
NULL,
(GClassInitFunc) gst_video_decoder_class_init,
NULL,
NULL,
sizeof (GstVideoDecoder),
0,
(GInstanceInitFunc) gst_video_decoder_init,
};
_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstVideoDecoder", &info, G_TYPE_FLAG_ABSTRACT);
g_once_init_leave (&type, _type);
}
return type;
}
static void
gst_video_decoder_class_init (GstVideoDecoderClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (videodecoder_debug, "videodecoder", 0,
"Base Video Decoder");
parent_class = g_type_class_peek_parent (klass);
g_type_class_add_private (klass, sizeof (GstVideoDecoderPrivate));
gobject_class->finalize = gst_video_decoder_finalize;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_video_decoder_change_state);
klass->sink_event = gst_video_decoder_sink_event_default;
klass->src_event = gst_video_decoder_src_event_default;
klass->decide_allocation = gst_video_decoder_decide_allocation_default;
}
static void
gst_video_decoder_init (GstVideoDecoder * decoder, GstVideoDecoderClass * klass)
{
GstPadTemplate *pad_template;
GstPad *pad;
GST_DEBUG_OBJECT (decoder, "gst_video_decoder_init");
decoder->priv = GST_VIDEO_DECODER_GET_PRIVATE (decoder);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
g_return_if_fail (pad_template != NULL);
decoder->sinkpad = pad = gst_pad_new_from_template (pad_template, "sink");
gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_video_decoder_chain));
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_video_decoder_sink_event));
gst_pad_set_query_function (pad,
GST_DEBUG_FUNCPTR (gst_video_decoder_sink_query));
gst_element_add_pad (GST_ELEMENT (decoder), decoder->sinkpad);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
g_return_if_fail (pad_template != NULL);
decoder->srcpad = pad = gst_pad_new_from_template (pad_template, "src");
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_video_decoder_src_event));
gst_pad_set_query_function (pad,
GST_DEBUG_FUNCPTR (gst_video_decoder_src_query));
gst_pad_use_fixed_caps (pad);
gst_element_add_pad (GST_ELEMENT (decoder), decoder->srcpad);
gst_segment_init (&decoder->input_segment, GST_FORMAT_TIME);
gst_segment_init (&decoder->output_segment, GST_FORMAT_TIME);
g_rec_mutex_init (&decoder->stream_lock);
decoder->priv->input_adapter = gst_adapter_new ();
decoder->priv->output_adapter = gst_adapter_new ();
decoder->priv->packetized = TRUE;
gst_video_decoder_reset (decoder, TRUE);
}
static gboolean
gst_video_rawvideo_convert (GstVideoCodecState * state,
GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
gboolean res = FALSE;
guint vidsize;
guint fps_n, fps_d;
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_value != NULL, FALSE);
if (src_format == *dest_format || src_value == 0 || src_value == -1) {
*dest_value = src_value;
return TRUE;
}
vidsize = GST_VIDEO_INFO_SIZE (&state->info);
fps_n = GST_VIDEO_INFO_FPS_N (&state->info);
fps_d = GST_VIDEO_INFO_FPS_D (&state->info);
if (src_format == GST_FORMAT_BYTES &&
*dest_format == GST_FORMAT_DEFAULT && vidsize) {
/* convert bytes to frames */
*dest_value = gst_util_uint64_scale_int (src_value, 1, vidsize);
res = TRUE;
} else if (src_format == GST_FORMAT_DEFAULT &&
*dest_format == GST_FORMAT_BYTES && vidsize) {
/* convert bytes to frames */
*dest_value = src_value * vidsize;
res = TRUE;
} else if (src_format == GST_FORMAT_DEFAULT &&
*dest_format == GST_FORMAT_TIME && fps_n) {
/* convert frames to time */
*dest_value = gst_util_uint64_scale (src_value, GST_SECOND * fps_d, fps_n);
res = TRUE;
} else if (src_format == GST_FORMAT_TIME &&
*dest_format == GST_FORMAT_DEFAULT && fps_d) {
/* convert time to frames */
*dest_value = gst_util_uint64_scale (src_value, fps_n, GST_SECOND * fps_d);
res = TRUE;
} else if (src_format == GST_FORMAT_TIME &&
*dest_format == GST_FORMAT_BYTES && fps_d && vidsize) {
/* convert time to frames */
*dest_value = gst_util_uint64_scale (src_value,
fps_n * vidsize, GST_SECOND * fps_d);
res = TRUE;
} else if (src_format == GST_FORMAT_BYTES &&
*dest_format == GST_FORMAT_TIME && fps_n && vidsize) {
/* convert frames to time */
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * fps_d, fps_n * vidsize);
res = TRUE;
}
return res;
}
static gboolean
gst_video_encoded_video_convert (gint64 bytes, gint64 time,
GstFormat src_format, gint64 src_value, GstFormat * dest_format,
gint64 * dest_value)
{
gboolean res = FALSE;
g_return_val_if_fail (dest_format != NULL, FALSE);
g_return_val_if_fail (dest_value != NULL, FALSE);
if (G_UNLIKELY (src_format == *dest_format || src_value == 0 ||
src_value == -1)) {
if (dest_value)
*dest_value = src_value;
return TRUE;
}
if (bytes <= 0 || time <= 0) {
GST_DEBUG ("not enough metadata yet to convert");
goto exit;
}
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale (src_value, time, bytes);
res = TRUE;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale (src_value, bytes, time);
res = TRUE;
break;
default:
res = FALSE;
}
break;
default:
GST_DEBUG ("unhandled conversion from %d to %d", src_format,
*dest_format);
res = FALSE;
}
exit:
return res;
}
static GstVideoCodecState *
_new_input_state (GstCaps * caps)
{
GstVideoCodecState *state;
GstStructure *structure;
const GValue *codec_data;
state = g_slice_new0 (GstVideoCodecState);
state->ref_count = 1;
gst_video_info_init (&state->info);
if (G_UNLIKELY (!gst_video_info_from_caps (&state->info, caps)))
goto parse_fail;
state->caps = gst_caps_ref (caps);
structure = gst_caps_get_structure (caps, 0);
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER)
state->codec_data = GST_BUFFER (g_value_dup_boxed (codec_data));
return state;
parse_fail:
{
g_slice_free (GstVideoCodecState, state);
return NULL;
}
}
static GstVideoCodecState *
_new_output_state (GstVideoFormat fmt, guint width, guint height,
GstVideoCodecState * reference)
{
GstVideoCodecState *state;
state = g_slice_new0 (GstVideoCodecState);
state->ref_count = 1;
gst_video_info_init (&state->info);
gst_video_info_set_format (&state->info, fmt, width, height);
if (reference) {
GstVideoInfo *tgt, *ref;
tgt = &state->info;
ref = &reference->info;
/* Copy over extra fields from reference state */
tgt->interlace_mode = ref->interlace_mode;
tgt->flags = ref->flags;
tgt->chroma_site = ref->chroma_site;
tgt->colorimetry = ref->colorimetry;
GST_DEBUG ("reference par %d/%d fps %d/%d",
ref->par_n, ref->par_d, ref->fps_n, ref->fps_d);
tgt->par_n = ref->par_n;
tgt->par_d = ref->par_d;
tgt->fps_n = ref->fps_n;
tgt->fps_d = ref->fps_d;
}
GST_DEBUG ("reference par %d/%d fps %d/%d",
state->info.par_n, state->info.par_d,
state->info.fps_n, state->info.fps_d);
return state;
}
static gboolean
gst_video_decoder_setcaps (GstVideoDecoder * decoder, GstCaps * caps)
{
GstVideoDecoderClass *decoder_class;
GstVideoCodecState *state;
gboolean ret = TRUE;
decoder_class = GST_VIDEO_DECODER_GET_CLASS (decoder);
GST_DEBUG_OBJECT (decoder, "setcaps %" GST_PTR_FORMAT, caps);
state = _new_input_state (caps);
if (G_UNLIKELY (state == NULL))
goto parse_fail;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (decoder_class->set_format)
ret = decoder_class->set_format (decoder, state);
if (!ret)
goto refused_format;
if (decoder->priv->input_state)
gst_video_codec_state_unref (decoder->priv->input_state);
decoder->priv->input_state = state;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
/* ERRORS */
parse_fail:
{
GST_WARNING_OBJECT (decoder, "Failed to parse caps");
return FALSE;
}
refused_format:
{
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
GST_WARNING_OBJECT (decoder, "Subclass refused caps");
gst_video_codec_state_unref (state);
return FALSE;
}
}
static void
gst_video_decoder_finalize (GObject * object)
{
GstVideoDecoder *decoder;
decoder = GST_VIDEO_DECODER (object);
GST_DEBUG_OBJECT (object, "finalize");
g_rec_mutex_clear (&decoder->stream_lock);
if (decoder->priv->input_adapter) {
g_object_unref (decoder->priv->input_adapter);
decoder->priv->input_adapter = NULL;
}
if (decoder->priv->output_adapter) {
g_object_unref (decoder->priv->output_adapter);
decoder->priv->output_adapter = NULL;
}
if (decoder->priv->input_state)
gst_video_codec_state_unref (decoder->priv->input_state);
if (decoder->priv->output_state)
gst_video_codec_state_unref (decoder->priv->output_state);
if (decoder->priv->pool) {
gst_object_unref (decoder->priv->pool);
decoder->priv->pool = NULL;
}
if (decoder->priv->allocator) {
gst_allocator_unref (decoder->priv->allocator);
decoder->priv->pool = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* hard == FLUSH, otherwise discont */
static GstFlowReturn
gst_video_decoder_flush (GstVideoDecoder * dec, gboolean hard)
{
GstVideoDecoderClass *klass;
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn ret = GST_FLOW_OK;
klass = GST_VIDEO_DECODER_GET_CLASS (dec);
GST_LOG_OBJECT (dec, "flush hard %d", hard);
/* Inform subclass */
if (klass->reset)
klass->reset (dec, hard);
/* FIXME make some more distinction between hard and soft,
* but subclass may not be prepared for that */
/* FIXME perhaps also clear pending frames ?,
* but again, subclass may still come up with one of those */
if (!hard) {
/* TODO ? finish/drain some stuff */
} else {
gst_segment_init (&dec->input_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&dec->output_segment, GST_FORMAT_UNDEFINED);
gst_video_decoder_clear_queues (dec);
priv->error_count = 0;
g_list_foreach (priv->current_frame_events, (GFunc) gst_event_unref, NULL);
g_list_free (priv->current_frame_events);
priv->current_frame_events = NULL;
}
/* and get (re)set for the sequel */
gst_video_decoder_reset (dec, FALSE);
return ret;
}
static gboolean
gst_video_decoder_push_event (GstVideoDecoder * decoder, GstEvent * event)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
GstSegment segment;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_event_copy_segment (event, &segment);
GST_DEBUG_OBJECT (decoder, "segment %" GST_SEGMENT_FORMAT, &segment);
if (segment.format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (decoder, "received non TIME newsegment");
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
}
decoder->output_segment = segment;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
}
default:
break;
}
return gst_pad_push_event (decoder->srcpad, event);
}
static gboolean
gst_video_decoder_sink_event_default (GstVideoDecoder * decoder,
GstEvent * event)
{
GstVideoDecoderClass *decoder_class;
GstVideoDecoderPrivate *priv;
gboolean ret = FALSE;
priv = decoder->priv;
decoder_class = GST_VIDEO_DECODER_GET_CLASS (decoder);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_video_decoder_setcaps (decoder, caps);
gst_event_unref (event);
event = NULL;
break;
}
case GST_EVENT_EOS:
{
GstFlowReturn flow_ret = GST_FLOW_OK;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (!priv->packetized)
while (flow_ret == GST_FLOW_OK &&
gst_adapter_available (priv->input_adapter))
flow_ret =
decoder_class->parse (decoder, priv->current_frame,
priv->input_adapter, TRUE);
if (decoder_class->finish) {
flow_ret = decoder_class->finish (decoder);
} else {
flow_ret = GST_FLOW_OK;
}
ret = (flow_ret == GST_FLOW_OK);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment segment;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_event_copy_segment (event, &segment);
if (segment.format == GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (decoder,
"received TIME SEGMENT %" GST_SEGMENT_FORMAT, &segment);
} else {
gint64 start;
GST_DEBUG_OBJECT (decoder,
"received SEGMENT %" GST_SEGMENT_FORMAT, &segment);
/* handle newsegment as a result from our legacy simple seeking */
/* note that initial 0 should convert to 0 in any case */
if (priv->do_estimate_rate &&
gst_pad_query_convert (decoder->sinkpad, GST_FORMAT_BYTES,
segment.start, GST_FORMAT_TIME, &start)) {
/* best attempt convert */
/* as these are only estimates, stop is kept open-ended to avoid
* premature cutting */
GST_DEBUG_OBJECT (decoder,
"converted to TIME start %" GST_TIME_FORMAT,
GST_TIME_ARGS (start));
segment.start = start;
segment.stop = GST_CLOCK_TIME_NONE;
segment.time = start;
/* replace event */
gst_event_unref (event);
event = gst_event_new_segment (&segment);
} else {
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
goto newseg_wrong_format;
}
}
gst_video_decoder_flush (decoder, FALSE);
priv->timestamp_offset = segment.start;
decoder->input_segment = segment;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
}
case GST_EVENT_FLUSH_STOP:
{
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
/* well, this is kind of worse than a DISCONT */
gst_video_decoder_flush (decoder, TRUE);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
}
default:
break;
}
/* Forward non-serialized events and EOS/FLUSH_STOP immediately.
* For EOS this is required because no buffer or serialized event
* will come after EOS and nothing could trigger another
* _finish_frame() call. *
* If the subclass handles sending of EOS manually it can return
* _DROPPED from ::finish() and all other subclasses should have
* decoded/flushed all remaining data before this
*
* For FLUSH_STOP this is required because it is expected
* to be forwarded immediately and no buffers are queued anyway.
*/
if (event) {
if (!GST_EVENT_IS_SERIALIZED (event)
|| GST_EVENT_TYPE (event) == GST_EVENT_EOS
|| GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
ret = gst_video_decoder_push_event (decoder, event);
} else {
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
decoder->priv->current_frame_events =
g_list_prepend (decoder->priv->current_frame_events, event);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
ret = TRUE;
}
}
return ret;
newseg_wrong_format:
{
GST_DEBUG_OBJECT (decoder, "received non TIME newsegment");
gst_event_unref (event);
/* SWALLOW EVENT */
return TRUE;
}
}
static gboolean
gst_video_decoder_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstVideoDecoder *decoder;
GstVideoDecoderClass *decoder_class;
gboolean ret = FALSE;
decoder = GST_VIDEO_DECODER (parent);
decoder_class = GST_VIDEO_DECODER_GET_CLASS (decoder);
GST_DEBUG_OBJECT (decoder, "received event %d, %s", GST_EVENT_TYPE (event),
GST_EVENT_TYPE_NAME (event));
if (decoder_class->sink_event)
ret = decoder_class->sink_event (decoder, event);
return ret;
}
/* perform upstream byte <-> time conversion (duration, seeking)
* if subclass allows and if enough data for moderately decent conversion */
static inline gboolean
gst_video_decoder_do_byte (GstVideoDecoder * dec)
{
return dec->priv->do_estimate_rate && (dec->priv->bytes_out > 0)
&& (dec->priv->time > GST_SECOND);
}
static gboolean
gst_video_decoder_do_seek (GstVideoDecoder * dec, GstEvent * event)
{
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, end_type;
gdouble rate;
gint64 start, start_time, end_time;
GstSegment seek_segment;
guint32 seqnum;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type,
&start_time, &end_type, &end_time);
/* we'll handle plain open-ended flushing seeks with the simple approach */
if (rate != 1.0) {
GST_DEBUG_OBJECT (dec, "unsupported seek: rate");
return FALSE;
}
if (start_type != GST_SEEK_TYPE_SET) {
GST_DEBUG_OBJECT (dec, "unsupported seek: start time");
return FALSE;
}
if (end_type != GST_SEEK_TYPE_NONE ||
(end_type == GST_SEEK_TYPE_SET && end_time != GST_CLOCK_TIME_NONE)) {
GST_DEBUG_OBJECT (dec, "unsupported seek: end time");
return FALSE;
}
if (!(flags & GST_SEEK_FLAG_FLUSH)) {
GST_DEBUG_OBJECT (dec, "unsupported seek: not flushing");
return FALSE;
}
memcpy (&seek_segment, &dec->output_segment, sizeof (seek_segment));
gst_segment_do_seek (&seek_segment, rate, format, flags, start_type,
start_time, end_type, end_time, NULL);
start_time = seek_segment.position;
if (!gst_pad_query_convert (dec->sinkpad, GST_FORMAT_TIME, start_time,
GST_FORMAT_BYTES, &start)) {
GST_DEBUG_OBJECT (dec, "conversion failed");
return FALSE;
}
seqnum = gst_event_get_seqnum (event);
event = gst_event_new_seek (1.0, GST_FORMAT_BYTES, flags,
GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_NONE, -1);
gst_event_set_seqnum (event, seqnum);
GST_DEBUG_OBJECT (dec, "seeking to %" GST_TIME_FORMAT " at byte offset %"
G_GINT64_FORMAT, GST_TIME_ARGS (start_time), start);
return gst_pad_push_event (dec->sinkpad, event);
}
static gboolean
gst_video_decoder_src_event_default (GstVideoDecoder * decoder,
GstEvent * event)
{
GstVideoDecoderPrivate *priv;
gboolean res = FALSE;
priv = decoder->priv;
GST_DEBUG_OBJECT (decoder,
"received event %d, %s", GST_EVENT_TYPE (event),
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
GstFormat format;
gdouble rate;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gint64 cur, stop;
gint64 tcur, tstop;
guint32 seqnum;
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
seqnum = gst_event_get_seqnum (event);
/* upstream gets a chance first */
if ((res = gst_pad_push_event (decoder->sinkpad, event)))
break;
/* if upstream fails for a time seek, maybe we can help if allowed */
if (format == GST_FORMAT_TIME) {
if (gst_video_decoder_do_byte (decoder))
res = gst_video_decoder_do_seek (decoder, event);
break;
}
/* ... though a non-time seek can be aided as well */
/* First bring the requested format to time */
if (!(res =
gst_pad_query_convert (decoder->srcpad, format, cur,
GST_FORMAT_TIME, &tcur)))
goto convert_error;
if (!(res =
gst_pad_query_convert (decoder->srcpad, format, stop,
GST_FORMAT_TIME, &tstop)))
goto convert_error;
/* then seek with time on the peer */
event = gst_event_new_seek (rate, GST_FORMAT_TIME,
flags, cur_type, tcur, stop_type, tstop);
gst_event_set_seqnum (event, seqnum);
res = gst_pad_push_event (decoder->sinkpad, event);
break;
}
case GST_EVENT_QOS:
{
GstQOSType type;
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
GstClockTime duration;
gst_event_parse_qos (event, &type, &proportion, &diff, &timestamp);
GST_OBJECT_LOCK (decoder);
priv->proportion = proportion;
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (timestamp))) {
if (G_UNLIKELY (diff > 0)) {
if (priv->output_state->info.fps_n > 0)
duration =
gst_util_uint64_scale (GST_SECOND,
priv->output_state->info.fps_d, priv->output_state->info.fps_n);
else
duration = 0;
priv->earliest_time = timestamp + 2 * diff + duration;
} else {
priv->earliest_time = timestamp + diff;
}
} else {
priv->earliest_time = GST_CLOCK_TIME_NONE;
}
GST_OBJECT_UNLOCK (decoder);
GST_DEBUG_OBJECT (decoder,
"got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT ", %g",
GST_TIME_ARGS (timestamp), diff, proportion);
res = gst_pad_push_event (decoder->sinkpad, event);
break;
}
default:
res = gst_pad_push_event (decoder->sinkpad, event);
break;
}
done:
return res;
convert_error:
GST_DEBUG_OBJECT (decoder, "could not convert format");
goto done;
}
static gboolean
gst_video_decoder_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstVideoDecoder *decoder;
GstVideoDecoderClass *decoder_class;
gboolean ret = FALSE;
decoder = GST_VIDEO_DECODER (parent);
decoder_class = GST_VIDEO_DECODER_GET_CLASS (decoder);
GST_DEBUG_OBJECT (decoder, "received event %d, %s", GST_EVENT_TYPE (event),
GST_EVENT_TYPE_NAME (event));
if (decoder_class->src_event)
ret = decoder_class->src_event (decoder, event);
return ret;
}
static gboolean
gst_video_decoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstVideoDecoder *dec;
gboolean res = TRUE;
dec = GST_VIDEO_DECODER (parent);
GST_LOG_OBJECT (dec, "handling query: %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gint64 time, value;
/* upstream gets a chance first */
if ((res = gst_pad_peer_query (dec->sinkpad, query))) {
GST_LOG_OBJECT (dec, "returning peer response");
break;
}
/* we start from the last seen time */
time = dec->priv->last_timestamp;
/* correct for the segment values */
time = gst_segment_to_stream_time (&dec->output_segment,
GST_FORMAT_TIME, time);
GST_LOG_OBJECT (dec,
"query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));
/* and convert to the final format */
gst_query_parse_position (query, &format, NULL);
if (!(res = gst_pad_query_convert (pad, GST_FORMAT_TIME, time,
format, &value)))
break;
gst_query_set_position (query, format, value);
GST_LOG_OBJECT (dec,
"query %p: we return %" G_GINT64_FORMAT " (format %u)", query, value,
format);
break;
}
case GST_QUERY_DURATION:
{
GstFormat format;
/* upstream in any case */
if ((res = gst_pad_query_default (pad, parent, query)))
break;
gst_query_parse_duration (query, &format, NULL);
/* try answering TIME by converting from BYTE if subclass allows */
if (format == GST_FORMAT_TIME && gst_video_decoder_do_byte (dec)) {
gint64 value;
if (gst_pad_peer_query_duration (dec->sinkpad, GST_FORMAT_BYTES,
&value)) {
GST_LOG_OBJECT (dec, "upstream size %" G_GINT64_FORMAT, value);
if (gst_pad_query_convert (dec->sinkpad,
GST_FORMAT_BYTES, value, GST_FORMAT_TIME, &value)) {
gst_query_set_duration (query, GST_FORMAT_TIME, value);
res = TRUE;
}
}
}
break;
}
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
GST_DEBUG_OBJECT (dec, "convert query");
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res = gst_video_rawvideo_convert (dec->priv->output_state,
src_fmt, src_val, &dest_fmt, &dest_val);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
case GST_QUERY_LATENCY:
{
gboolean live;
GstClockTime min_latency, max_latency;
res = gst_pad_peer_query (dec->sinkpad, query);
if (res) {
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (dec, "Peer latency: live %d, min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
GST_OBJECT_LOCK (dec);
min_latency += dec->priv->min_latency;
if (dec->priv->max_latency == GST_CLOCK_TIME_NONE) {
max_latency = GST_CLOCK_TIME_NONE;
} else if (max_latency != GST_CLOCK_TIME_NONE) {
max_latency += dec->priv->max_latency;
}
GST_OBJECT_UNLOCK (dec);
gst_query_set_latency (query, live, min_latency, max_latency);
}
}
break;
default:
res = gst_pad_query_default (pad, parent, query);
}
return res;
error:
GST_ERROR_OBJECT (dec, "query failed");
return res;
}
static gboolean
gst_video_decoder_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
GstVideoDecoder *decoder;
GstVideoDecoderPrivate *priv;
gboolean res = FALSE;
decoder = GST_VIDEO_DECODER (parent);
priv = decoder->priv;
GST_LOG_OBJECT (decoder, "handling query: %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res =
gst_video_encoded_video_convert (priv->bytes_out, priv->time, src_fmt,
src_val, &dest_fmt, &dest_val);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
done:
return res;
error:
GST_DEBUG_OBJECT (decoder, "query failed");
goto done;
}
typedef struct _Timestamp Timestamp;
struct _Timestamp
{
guint64 offset;
GstClockTime timestamp;
GstClockTime duration;
};
static void
gst_video_decoder_add_timestamp (GstVideoDecoder * decoder, GstBuffer * buffer)
{
GstVideoDecoderPrivate *priv = decoder->priv;
Timestamp *ts;
ts = g_malloc (sizeof (Timestamp));
GST_LOG_OBJECT (decoder,
"adding timestamp %" GST_TIME_FORMAT " (offset:%" G_GUINT64_FORMAT ")",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)), priv->input_offset);
ts->offset = priv->input_offset;
ts->timestamp = GST_BUFFER_TIMESTAMP (buffer);
ts->duration = GST_BUFFER_DURATION (buffer);
priv->timestamps = g_list_append (priv->timestamps, ts);
}
static void
gst_video_decoder_get_timestamp_at_offset (GstVideoDecoder *
decoder, guint64 offset, GstClockTime * timestamp, GstClockTime * duration)
{
Timestamp *ts;
GList *g;
*timestamp = GST_CLOCK_TIME_NONE;
*duration = GST_CLOCK_TIME_NONE;
g = decoder->priv->timestamps;
while (g) {
ts = g->data;
if (ts->offset <= offset) {
*timestamp = ts->timestamp;
*duration = ts->duration;
g_free (ts);
g = g->next;
decoder->priv->timestamps = g_list_remove (decoder->priv->timestamps, ts);
} else {
break;
}
}
GST_LOG_OBJECT (decoder,
"got timestamp %" GST_TIME_FORMAT " (offset:%" G_GUINT64_FORMAT ")",
GST_TIME_ARGS (*timestamp), offset);
}
static void
gst_video_decoder_clear_queues (GstVideoDecoder * dec)
{
GstVideoDecoderPrivate *priv = dec->priv;
g_list_foreach (priv->queued, (GFunc) gst_mini_object_unref, NULL);
g_list_free (priv->queued);
priv->queued = NULL;
g_list_foreach (priv->gather, (GFunc) gst_mini_object_unref, NULL);
g_list_free (priv->gather);
priv->gather = NULL;
g_list_foreach (priv->decode, (GFunc) gst_video_codec_frame_unref, NULL);
g_list_free (priv->decode);
priv->decode = NULL;
g_list_foreach (priv->parse, (GFunc) gst_mini_object_unref, NULL);
g_list_free (priv->parse);
priv->parse = NULL;
g_list_foreach (priv->parse_gather, (GFunc) gst_video_codec_frame_unref,
NULL);
g_list_free (priv->parse_gather);
priv->parse_gather = NULL;
g_list_foreach (priv->frames, (GFunc) gst_video_codec_frame_unref, NULL);
g_list_free (priv->frames);
priv->frames = NULL;
}
static void
gst_video_decoder_reset (GstVideoDecoder * decoder, gboolean full)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GList *g;
GST_DEBUG_OBJECT (decoder, "reset full %d", full);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (full) {
gst_segment_init (&decoder->input_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&decoder->output_segment, GST_FORMAT_UNDEFINED);
gst_video_decoder_clear_queues (decoder);
priv->error_count = 0;
priv->max_errors = GST_VIDEO_DECODER_MAX_ERRORS;
if (priv->input_state)
gst_video_codec_state_unref (priv->input_state);
priv->input_state = NULL;
if (priv->output_state)
gst_video_codec_state_unref (priv->output_state);
priv->output_state = NULL;
priv->min_latency = 0;
priv->max_latency = 0;
}
priv->discont = TRUE;
priv->timestamp_offset = GST_CLOCK_TIME_NONE;
priv->last_timestamp = GST_CLOCK_TIME_NONE;
priv->input_offset = 0;
priv->frame_offset = 0;
gst_adapter_clear (priv->input_adapter);
gst_adapter_clear (priv->output_adapter);
g_list_foreach (priv->timestamps, (GFunc) g_free, NULL);
g_list_free (priv->timestamps);
priv->timestamps = NULL;
if (priv->current_frame) {
gst_video_codec_frame_unref (priv->current_frame);
priv->current_frame = NULL;
}
priv->dropped = 0;
priv->processed = 0;
priv->decode_frame_number = 0;
priv->base_picture_number = 0;
for (g = priv->frames; g; g = g->next) {
gst_video_codec_frame_unref ((GstVideoCodecFrame *) g->data);
}
g_list_free (priv->frames);
priv->frames = NULL;
priv->bytes_out = 0;
priv->time = 0;
priv->earliest_time = GST_CLOCK_TIME_NONE;
priv->proportion = 0.5;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
}
static GstFlowReturn
gst_video_decoder_chain_forward (GstVideoDecoder * decoder, GstBuffer * buf)
{
GstVideoDecoderPrivate *priv;
GstVideoDecoderClass *klass;
GstFlowReturn ret = GST_FLOW_OK;
klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
priv = decoder->priv;
g_return_val_if_fail (priv->packetized || klass->parse, GST_FLOW_ERROR);
if (priv->current_frame == NULL) {
priv->current_frame = gst_video_decoder_new_frame (decoder);
}
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
gst_video_decoder_add_timestamp (decoder, buf);
}
priv->input_offset += gst_buffer_get_size (buf);
if (priv->packetized) {
priv->current_frame->input_buffer = buf;
if (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (priv->current_frame);
}
ret = gst_video_decoder_have_frame_2 (decoder);
} else {
gst_adapter_push (priv->input_adapter, buf);
if (G_UNLIKELY (!gst_adapter_available (priv->input_adapter)))
goto beach;
do {
ret =
klass->parse (decoder, priv->current_frame, priv->input_adapter,
FALSE);
} while (ret == GST_FLOW_OK && gst_adapter_available (priv->input_adapter));
}
beach:
if (ret == GST_VIDEO_DECODER_FLOW_NEED_DATA)
return GST_FLOW_OK;
return ret;
}
static GstFlowReturn
gst_video_decoder_flush_decode (GstVideoDecoder * dec)
{
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn res = GST_FLOW_OK;
GList *walk;
walk = priv->decode;
GST_DEBUG_OBJECT (dec, "flushing buffers to decode");
/* clear buffer and decoder state */
gst_video_decoder_flush (dec, FALSE);
/* signal have_frame it should not capture frames */
priv->process = TRUE;
while (walk) {
GList *next;
GstVideoCodecFrame *frame = (GstVideoCodecFrame *) (walk->data);
GstBuffer *buf = frame->input_buffer;
GST_DEBUG_OBJECT (dec, "decoding frame %p, ts %" GST_TIME_FORMAT,
buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
next = walk->next;
if (priv->current_frame)
gst_video_codec_frame_unref (priv->current_frame);
priv->current_frame = frame;
gst_video_codec_frame_ref (priv->current_frame);
/* decode buffer, resulting data prepended to queue */
res = gst_video_decoder_have_frame_2 (dec);
walk = next;
}
priv->process = FALSE;
return res;
}
static GstFlowReturn
gst_video_decoder_flush_parse (GstVideoDecoder * dec)
{
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn res = GST_FLOW_OK;
GList *walk;
walk = priv->parse;
GST_DEBUG_OBJECT (dec, "flushing buffers to parsing");
/* clear buffer and decoder state */
gst_video_decoder_flush (dec, FALSE);
while (walk) {
GList *next;
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
GST_DEBUG_OBJECT (dec, "parsing buffer %p, ts %" GST_TIME_FORMAT,
buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
next = walk->next;
/* parse buffer, resulting frames prepended to parse_gather queue */
gst_buffer_ref (buf);
res = gst_video_decoder_chain_forward (dec, buf);
/* if we generated output, we can discard the buffer, else we
* keep it in the queue */
if (priv->parse_gather) {
GST_DEBUG_OBJECT (dec, "parsed buffer to %p", priv->parse_gather->data);
priv->parse = g_list_delete_link (priv->parse, walk);
gst_buffer_unref (buf);
} else {
GST_DEBUG_OBJECT (dec, "buffer did not decode, keeping");
}
walk = next;
}
/* now we can process frames */
GST_DEBUG_OBJECT (dec, "checking frames");
while (priv->parse_gather) {
GstVideoCodecFrame *frame;
frame = (GstVideoCodecFrame *) (priv->parse_gather->data);
/* remove from the gather list */
priv->parse_gather =
g_list_delete_link (priv->parse_gather, priv->parse_gather);
/* copy to decode queue */
priv->decode = g_list_prepend (priv->decode, frame);
/* if we copied a keyframe, flush and decode the decode queue */
if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) {
GST_DEBUG_OBJECT (dec, "copied keyframe");
res = gst_video_decoder_flush_decode (dec);
}
}
/* now send queued data downstream */
while (priv->queued) {
GstBuffer *buf = GST_BUFFER_CAST (priv->queued->data);
if (G_LIKELY (res == GST_FLOW_OK)) {
GST_DEBUG_OBJECT (dec, "pushing buffer %p of size %" G_GSIZE_FORMAT ", "
"time %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT, buf,
gst_buffer_get_size (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
/* should be already, but let's be sure */
buf = gst_buffer_make_writable (buf);
/* avoid stray DISCONT from forward processing,
* which have no meaning in reverse pushing */
GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
res = gst_pad_push (dec->srcpad, buf);
} else {
gst_buffer_unref (buf);
}
priv->queued = g_list_delete_link (priv->queued, priv->queued);
}
return res;
}
static GstFlowReturn
gst_video_decoder_chain_reverse (GstVideoDecoder * dec, GstBuffer * buf)
{
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn result = GST_FLOW_OK;
/* if we have a discont, move buffers to the decode list */
if (!buf || GST_BUFFER_IS_DISCONT (buf)) {
GST_DEBUG_OBJECT (dec, "received discont");
while (priv->gather) {
GstBuffer *gbuf;
gbuf = GST_BUFFER_CAST (priv->gather->data);
/* remove from the gather list */
priv->gather = g_list_delete_link (priv->gather, priv->gather);
/* copy to parse queue */
priv->parse = g_list_prepend (priv->parse, gbuf);
}
/* parse and decode stuff in the parse queue */
gst_video_decoder_flush_parse (dec);
}
if (G_LIKELY (buf)) {
GST_DEBUG_OBJECT (dec, "gathering buffer %p of size %" G_GSIZE_FORMAT ", "
"time %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT, buf,
gst_buffer_get_size (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
/* add buffer to gather queue */
priv->gather = g_list_prepend (priv->gather, buf);
}
return result;
}
static GstFlowReturn
gst_video_decoder_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstVideoDecoder *decoder;
GstVideoDecoderPrivate *priv;
GstFlowReturn ret = GST_FLOW_OK;
decoder = GST_VIDEO_DECODER (parent);
priv = decoder->priv;
GST_LOG_OBJECT (decoder,
"chain %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT " size %"
G_GSIZE_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), gst_buffer_get_size (buf));
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
/* NOTE:
* requiring the pad to be negotiated makes it impossible to use
* oggdemux or filesrc ! decoder */
if (decoder->input_segment.format == GST_FORMAT_UNDEFINED) {
GstEvent *event;
GstSegment *segment = &decoder->input_segment;
GST_WARNING_OBJECT (decoder,
"Received buffer without a new-segment. "
"Assuming timestamps start from 0.");
gst_segment_init (segment, GST_FORMAT_TIME);
event = gst_event_new_segment (segment);
decoder->priv->current_frame_events =
g_list_prepend (decoder->priv->current_frame_events, event);
}
if (G_UNLIKELY (GST_BUFFER_IS_DISCONT (buf))) {
gint64 ts;
GST_DEBUG_OBJECT (decoder, "received DISCONT buffer");
/* track present position */
ts = priv->timestamp_offset;
/* buffer may claim DISCONT loudly, if it can't tell us where we are now,
* we'll stick to where we were ...
* Particularly useful/needed for upstream BYTE based */
if (decoder->input_segment.rate > 0.0
&& !GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
GST_DEBUG_OBJECT (decoder, "... but restoring previous ts tracking");
priv->timestamp_offset = ts;
}
}
if (decoder->input_segment.rate > 0.0)
ret = gst_video_decoder_chain_forward (decoder, buf);
else
ret = gst_video_decoder_chain_reverse (decoder, buf);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
}
static GstStateChangeReturn
gst_video_decoder_change_state (GstElement * element, GstStateChange transition)
{
GstVideoDecoder *decoder;
GstVideoDecoderClass *decoder_class;
GstStateChangeReturn ret;
decoder = GST_VIDEO_DECODER (element);
decoder_class = GST_VIDEO_DECODER_GET_CLASS (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
/* open device/library if needed */
if (decoder_class->open && !decoder_class->open (decoder))
goto open_failed;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* Initialize device/library if needed */
if (decoder_class->start && !decoder_class->start (decoder))
goto start_failed;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (decoder_class->stop && !decoder_class->stop (decoder))
goto stop_failed;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_video_decoder_reset (decoder, TRUE);
g_list_foreach (decoder->priv->current_frame_events,
(GFunc) gst_event_unref, NULL);
g_list_free (decoder->priv->current_frame_events);
decoder->priv->current_frame_events = NULL;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
/* close device/library if needed */
if (decoder_class->close && !decoder_class->close (decoder))
goto close_failed;
break;
default:
break;
}
return ret;
/* Errors */
open_failed:
{
GST_ELEMENT_ERROR (decoder, LIBRARY, INIT, (NULL),
("Failed to open decoder"));
return GST_STATE_CHANGE_FAILURE;
}
start_failed:
{
GST_ELEMENT_ERROR (decoder, LIBRARY, INIT, (NULL),
("Failed to start decoder"));
return GST_STATE_CHANGE_FAILURE;
}
stop_failed:
{
GST_ELEMENT_ERROR (decoder, LIBRARY, INIT, (NULL),
("Failed to stop decoder"));
return GST_STATE_CHANGE_FAILURE;
}
close_failed:
{
GST_ELEMENT_ERROR (decoder, LIBRARY, INIT, (NULL),
("Failed to close decoder"));
return GST_STATE_CHANGE_FAILURE;
}
}
static GstVideoCodecFrame *
gst_video_decoder_new_frame (GstVideoDecoder * decoder)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstVideoCodecFrame *frame;
frame = g_slice_new0 (GstVideoCodecFrame);
frame->ref_count = 1;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
frame->system_frame_number = priv->system_frame_number;
priv->system_frame_number++;
frame->decode_frame_number = priv->decode_frame_number;
priv->decode_frame_number++;
frame->dts = GST_CLOCK_TIME_NONE;
frame->pts = GST_CLOCK_TIME_NONE;
frame->duration = GST_CLOCK_TIME_NONE;
frame->events = priv->current_frame_events;
priv->current_frame_events = NULL;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
GST_LOG_OBJECT (decoder, "Created new frame %p (sfn:%d)",
frame, frame->system_frame_number);
return frame;
}
static void
gst_video_decoder_prepare_finish_frame (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GList *l, *events = NULL;
#ifndef GST_DISABLE_GST_DEBUG
GST_LOG_OBJECT (decoder, "n %d in %d out %d",
g_list_length (priv->frames),
gst_adapter_available (priv->input_adapter),
gst_adapter_available (priv->output_adapter));
#endif
GST_LOG_OBJECT (decoder,
"finish frame %p sync=%d pts=%" GST_TIME_FORMAT, frame,
GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame), GST_TIME_ARGS (frame->pts));
/* Push all pending events that arrived before this frame */
for (l = priv->frames; l; l = l->next) {
GstVideoCodecFrame *tmp = l->data;
if (tmp->events) {
events = g_list_concat (events, tmp->events);
tmp->events = NULL;
}
if (tmp == frame)
break;
}
for (l = g_list_last (events); l; l = l->prev) {
GST_LOG_OBJECT (decoder, "pushing %s event", GST_EVENT_TYPE_NAME (l->data));
gst_video_decoder_push_event (decoder, l->data);
}
g_list_free (events);
/* Check if the data should not be displayed. For example altref/invisible
* frame in vp8. In this case we should not update the timestamps. */
if (GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY (frame))
return;
/* If the frame is meant to be outputted but we don't have an output buffer
* we have a problem :) */
if (G_UNLIKELY (frame->output_buffer == NULL))
goto no_output_buffer;
if (GST_CLOCK_TIME_IS_VALID (frame->pts)) {
if (frame->pts != priv->timestamp_offset) {
GST_DEBUG_OBJECT (decoder,
"sync timestamp %" GST_TIME_FORMAT " diff %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts),
GST_TIME_ARGS (frame->pts - decoder->output_segment.start));
priv->timestamp_offset = frame->pts;
} else {
/* This case is for one initial timestamp and no others, e.g.,
* filesrc ! decoder ! xvimagesink */
GST_WARNING_OBJECT (decoder, "sync timestamp didn't change, ignoring");
frame->pts = GST_CLOCK_TIME_NONE;
}
} else {
if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) {
GST_WARNING_OBJECT (decoder, "sync point doesn't have timestamp");
if (!GST_CLOCK_TIME_IS_VALID (priv->timestamp_offset)) {
GST_WARNING_OBJECT (decoder,
"No base timestamp. Assuming frames start at segment start");
priv->timestamp_offset = decoder->output_segment.start;
}
}
}
if (frame->pts == GST_CLOCK_TIME_NONE) {
frame->pts =
gst_video_decoder_get_timestamp (decoder, frame->decode_frame_number);
frame->duration = GST_CLOCK_TIME_NONE;
}
if (frame->duration == GST_CLOCK_TIME_NONE) {
frame->duration = gst_video_decoder_get_frame_duration (decoder, frame);
}
if (GST_CLOCK_TIME_IS_VALID (priv->last_timestamp)) {
if (frame->pts < priv->last_timestamp) {
GST_WARNING_OBJECT (decoder,
"decreasing timestamp (%" GST_TIME_FORMAT " < %"
GST_TIME_FORMAT ")",
GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (priv->last_timestamp));
}
}
priv->last_timestamp = frame->pts;
return;
/* ERRORS */
no_output_buffer:
{
GST_ERROR_OBJECT (decoder, "No buffer to output !");
}
}
static void
gst_video_decoder_do_finish_frame (GstVideoDecoder * dec,
GstVideoCodecFrame * frame)
{
/* unref once from the list */
dec->priv->frames = g_list_remove (dec->priv->frames, frame);
gst_video_codec_frame_unref (frame);
/* unref because this function takes ownership */
gst_video_codec_frame_unref (frame);
}
/**
* gst_video_decoder_drop_frame:
* @dec: a #GstVideoDecoder
* @frame: (transfer full): the #GstVideoCodecFrame to drop
*
* Similar to gst_video_decoder_finish_frame(), but drops @frame in any
* case and posts a QoS message with the frame's details on the bus.
* In any case, the frame is considered finished and released.
*
* Returns: a #GstFlowReturn, usually GST_FLOW_OK.
*
* Since: 0.10.36
*/
GstFlowReturn
gst_video_decoder_drop_frame (GstVideoDecoder * dec, GstVideoCodecFrame * frame)
{
GstClockTime stream_time, jitter, earliest_time, qostime, timestamp;
GstSegment *segment;
GstMessage *qos_msg;
gdouble proportion;
GST_LOG_OBJECT (dec, "drop frame %p", frame);
GST_VIDEO_DECODER_STREAM_LOCK (dec);
gst_video_decoder_prepare_finish_frame (dec, frame);
GST_DEBUG_OBJECT (dec, "dropping frame %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts));
dec->priv->dropped++;
/* post QoS message */
timestamp = frame->pts;
proportion = dec->priv->proportion;
segment = &dec->output_segment;
stream_time =
gst_segment_to_stream_time (segment, GST_FORMAT_TIME, timestamp);
qostime = gst_segment_to_running_time (segment, GST_FORMAT_TIME, timestamp);
earliest_time = dec->priv->earliest_time;
jitter = GST_CLOCK_DIFF (qostime, earliest_time);
qos_msg =
gst_message_new_qos (GST_OBJECT_CAST (dec), FALSE, qostime, stream_time,
timestamp, GST_CLOCK_TIME_NONE);
gst_message_set_qos_values (qos_msg, jitter, proportion, 1000000);
gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS,
dec->priv->processed, dec->priv->dropped);
gst_element_post_message (GST_ELEMENT_CAST (dec), qos_msg);
/* now free the frame */
gst_video_decoder_do_finish_frame (dec, frame);
GST_VIDEO_DECODER_STREAM_UNLOCK (dec);
return GST_FLOW_OK;
}
/**
* gst_video_decoder_finish_frame:
* @decoder: a #GstVideoDecoder
* @frame: (transfer full): a decoded #GstVideoCodecFrame
*
* @frame should have a valid decoded data buffer, whose metadata fields
* are then appropriately set according to frame data and pushed downstream.
* If no output data is provided, @frame is considered skipped.
* In any case, the frame is considered finished and released.
*
* Returns: a #GstFlowReturn resulting from sending data downstream
*
* Since: 0.10.36
*/
GstFlowReturn
gst_video_decoder_finish_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstBuffer *output_buffer;
GstFlowReturn ret = GST_FLOW_OK;
guint64 start, stop;
GstSegment *segment;
GST_LOG_OBJECT (decoder, "finish frame %p", frame);
if (G_UNLIKELY (priv->output_state_changed || (priv->output_state
&& gst_pad_check_reconfigure (decoder->srcpad))))
gst_video_decoder_set_src_caps (decoder);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_video_decoder_prepare_finish_frame (decoder, frame);
priv->processed++;
/* no buffer data means this frame is skipped */
if (!frame->output_buffer || GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY (frame)) {
GST_DEBUG_OBJECT (decoder, "skipping frame %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts));
goto done;
}
output_buffer = gst_buffer_make_writable (frame->output_buffer);
frame->output_buffer = NULL;
GST_BUFFER_FLAG_UNSET (output_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
if (priv->discont) {
GST_BUFFER_FLAG_SET (output_buffer, GST_BUFFER_FLAG_DISCONT);
priv->discont = FALSE;
}
/* Check for clipping */
start = frame->pts;
stop = frame->pts + frame->duration;
segment = &decoder->output_segment;
if (gst_segment_clip (segment, GST_FORMAT_TIME, start, stop, &start, &stop)) {
GST_BUFFER_TIMESTAMP (output_buffer) = start;
GST_BUFFER_DURATION (output_buffer) = stop - start;
GST_LOG_OBJECT (decoder,
"accepting buffer inside segment: %" GST_TIME_FORMAT " %"
GST_TIME_FORMAT " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
" time %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (output_buffer)),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (output_buffer) +
GST_BUFFER_DURATION (output_buffer)),
GST_TIME_ARGS (segment->start), GST_TIME_ARGS (segment->stop),
GST_TIME_ARGS (segment->time));
} else {
GST_LOG_OBJECT (decoder,
"dropping buffer outside segment: %" GST_TIME_FORMAT
" %" GST_TIME_FORMAT
" seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
" time %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts),
GST_TIME_ARGS (frame->pts + frame->duration),
GST_TIME_ARGS (segment->start),
GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time));
gst_buffer_unref (output_buffer);
ret = GST_FLOW_OK;
goto done;
}
GST_BUFFER_OFFSET (output_buffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (output_buffer) = GST_BUFFER_OFFSET_NONE;
/* update rate estimate */
priv->bytes_out += gst_buffer_get_size (output_buffer);
if (GST_CLOCK_TIME_IS_VALID (frame->duration)) {
priv->time += frame->duration;
} else {
/* FIXME : Use difference between current and previous outgoing
* timestamp, and relate to difference between current and previous
* bytes */
/* better none than nothing valid */
priv->time = GST_CLOCK_TIME_NONE;
}
GST_LOG_OBJECT (decoder, "pushing frame ts %" GST_TIME_FORMAT
", duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (output_buffer)),
GST_TIME_ARGS (GST_BUFFER_DURATION (output_buffer)));
/* we got data, so note things are looking up again */
/* FIXME : Shouldn't we avoid going under zero ? */
if (G_UNLIKELY (priv->error_count))
priv->error_count--;
if (decoder->output_segment.rate < 0.0) {
GST_LOG_OBJECT (decoder, "queued buffer");
priv->queued = g_list_prepend (priv->queued, output_buffer);
} else {
ret = gst_pad_push (decoder->srcpad, output_buffer);
}
done:
gst_video_decoder_do_finish_frame (decoder, frame);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
}
/**
* gst_video_decoder_add_to_frame:
* @decoder: a #GstVideoDecoder
* @n_bytes: an encoded #GstVideoCodecFrame
*
* Removes next @n_bytes of input data and adds it to currently parsed frame.
*
* Since: 0.10.36
*/
void
gst_video_decoder_add_to_frame (GstVideoDecoder * decoder, int n_bytes)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstBuffer *buf;
GST_LOG_OBJECT (decoder, "add %d bytes to frame", n_bytes);
if (n_bytes == 0)
return;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (gst_adapter_available (priv->output_adapter) == 0) {
priv->frame_offset =
priv->input_offset - gst_adapter_available (priv->input_adapter);
}
buf = gst_adapter_take_buffer (priv->input_adapter, n_bytes);
gst_adapter_push (priv->output_adapter, buf);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
}
static guint64
gst_video_decoder_get_timestamp (GstVideoDecoder * decoder, int picture_number)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstVideoCodecState *state = priv->output_state;
if (state->info.fps_d == 0 || state->info.fps_n == 0) {
return -1;
}
if (picture_number < priv->base_picture_number) {
return priv->timestamp_offset -
(gint64) gst_util_uint64_scale (priv->base_picture_number
- picture_number, state->info.fps_d * GST_SECOND, state->info.fps_n);
} else {
return priv->timestamp_offset +
gst_util_uint64_scale (picture_number -
priv->base_picture_number, state->info.fps_d * GST_SECOND,
state->info.fps_n);
}
}
static guint64
gst_video_decoder_get_frame_duration (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstVideoCodecState *state = decoder->priv->output_state;
if (state->info.fps_d == 0 || state->info.fps_n == 0) {
return GST_CLOCK_TIME_NONE;
}
/* FIXME: For interlaced frames this needs to take into account
* the number of valid fields in the frame
*/
return gst_util_uint64_scale (GST_SECOND, state->info.fps_d,
state->info.fps_n);
}
/**
* gst_video_decoder_have_frame:
* @decoder: a #GstVideoDecoder
*
* Gathers all data collected for currently parsed frame, gathers corresponding
* metadata and passes it along for further processing, i.e. @handle_frame.
*
* Returns: a #GstFlowReturn
*
* Since: 0.10.36
*/
GstFlowReturn
gst_video_decoder_have_frame (GstVideoDecoder * decoder)
{
GstBuffer *buffer;
int n_available;
GstClockTime timestamp;
GstClockTime duration;
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (decoder, "have_frame");
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
n_available = gst_adapter_available (decoder->priv->output_adapter);
if (n_available) {
buffer =
gst_adapter_take_buffer (decoder->priv->output_adapter, n_available);
} else {
buffer = gst_buffer_new_and_alloc (0);
}
decoder->priv->current_frame->input_buffer = buffer;
gst_video_decoder_get_timestamp_at_offset (decoder,
decoder->priv->frame_offset, &timestamp, &duration);
GST_BUFFER_TIMESTAMP (buffer) = timestamp;
GST_BUFFER_DURATION (buffer) = duration;
GST_LOG_OBJECT (decoder, "collected frame size %d, "
"ts %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT,
n_available, GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
ret = gst_video_decoder_have_frame_2 (decoder);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
}
static GstFlowReturn
gst_video_decoder_have_frame_2 (GstVideoDecoder * decoder)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstVideoCodecFrame *frame = priv->current_frame;
GstVideoDecoderClass *decoder_class;
GstFlowReturn ret = GST_FLOW_OK;
decoder_class = GST_VIDEO_DECODER_GET_CLASS (decoder);
/* FIXME : This should only have to be checked once (either the subclass has an
* implementation, or it doesn't) */
g_return_val_if_fail (decoder_class->handle_frame != NULL, GST_FLOW_ERROR);
/* capture frames and queue for later processing */
if (decoder->output_segment.rate < 0.0 && !priv->process) {
priv->parse_gather = g_list_prepend (priv->parse_gather, frame);
goto exit;
}
frame->distance_from_sync = priv->distance_from_sync;
priv->distance_from_sync++;
frame->pts = GST_BUFFER_TIMESTAMP (frame->input_buffer);
frame->duration = GST_BUFFER_DURATION (frame->input_buffer);
/* For keyframes, DTS = PTS */
if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame))
frame->dts = frame->pts;
GST_LOG_OBJECT (decoder, "pts %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->pts));
GST_LOG_OBJECT (decoder, "dts %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->dts));
GST_LOG_OBJECT (decoder, "dist %d", frame->distance_from_sync);
priv->frames = g_list_append (priv->frames, frame);
frame->deadline =
gst_segment_to_running_time (&decoder->input_segment, GST_FORMAT_TIME,
frame->pts);
/* do something with frame */
gst_video_codec_frame_ref (frame);
ret = decoder_class->handle_frame (decoder, frame);
if (ret != GST_FLOW_OK)
GST_DEBUG_OBJECT (decoder, "flow error %s", gst_flow_get_name (ret));
exit:
/* current frame has either been added to parse_gather or sent to
handle frame so there is no need to unref it */
/* create new frame */
priv->current_frame = gst_video_decoder_new_frame (decoder);
return ret;
}
/**
* gst_video_decoder_get_output_state:
* @decoder: a #GstVideoDecoder
*
* Get the #GstVideoCodecState currently describing the output stream.
*
* Returns: (transfer full): #GstVideoCodecState describing format of video data.
*
* Since: 0.10.36
*/
GstVideoCodecState *
gst_video_decoder_get_output_state (GstVideoDecoder * decoder)
{
GstVideoCodecState *state = NULL;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (decoder->priv->output_state)
state = gst_video_codec_state_ref (decoder->priv->output_state);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return state;
}
/**
* gst_video_decoder_set_output_state:
* @decoder: a #GstVideoDecoder
* @fmt: a #GstVideoFormat
* @width: The width in pixels
* @height: The height in pixels
* @reference: (allow-none) (transfer none): An optional reference #GstVideoCodecState
*
* Creates a new #GstVideoCodecState with the specified @fmt, @width and @height
* as the output state for the decoder.
* Any previously set output state on @decoder will be replaced by the newly
* created one.
*
* If the subclass wishes to copy over existing fields (like pixel aspec ratio,
* or framerate) from an existing #GstVideoCodecState, it can be provided as a
* @reference.
*
* If the subclass wishes to override some fields from the output state (like
* pixel-aspect-ratio or framerate) it can do so on the returned #GstVideoCodecState.
*
* The new output state will only take effect (set on pads and buffers) starting
* from the next call to #gst_video_decoder_finish_frame().
*
* Returns: (transfer full): the newly configured output state.
*
* Since: 0.10.36
*/
GstVideoCodecState *
gst_video_decoder_set_output_state (GstVideoDecoder * decoder,
GstVideoFormat fmt, guint width, guint height,
GstVideoCodecState * reference)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstVideoCodecState *state;
GST_DEBUG_OBJECT (decoder, "fmt:%d, width:%d, height:%d, reference:%p",
fmt, width, height, reference);
/* Create the new output state */
state = _new_output_state (fmt, width, height, reference);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
/* Replace existing output state by new one */
if (priv->output_state)
gst_video_codec_state_unref (priv->output_state);
priv->output_state = gst_video_codec_state_ref (state);
priv->output_state_changed = TRUE;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return state;
}
/**
* gst_video_decoder_get_oldest_frame:
* @decoder: a #GstVideoDecoder
*
* Get the oldest pending unfinished #GstVideoCodecFrame
*
* Returns: (transfer full): oldest pending unfinished #GstVideoCodecFrame.
*
* Since: 0.10.36
*/
GstVideoCodecFrame *
gst_video_decoder_get_oldest_frame (GstVideoDecoder * decoder)
{
GstVideoCodecFrame *frame = NULL;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (decoder->priv->frames)
frame = gst_video_codec_frame_ref (decoder->priv->frames->data);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return (GstVideoCodecFrame *) frame;
}
/**
* gst_video_decoder_get_frame:
* @decoder: a #GstVideoDecoder
* @frame_number: system_frame_number of a frame
*
* Get a pending unfinished #GstVideoCodecFrame
*
* Returns: (transfer none): pending unfinished #GstVideoCodecFrame identified by @frame_number.
*
* Since: 0.10.36
*/
GstVideoCodecFrame *
gst_video_decoder_get_frame (GstVideoDecoder * decoder, int frame_number)
{
GList *g;
GstVideoCodecFrame *frame = NULL;
GST_DEBUG_OBJECT (decoder, "frame_number : %d", frame_number);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
for (g = decoder->priv->frames; g; g = g->next) {
GstVideoCodecFrame *tmp = g->data;
if (tmp->system_frame_number == frame_number) {
frame = tmp;
break;
}
}
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return frame;
}
static gboolean
gst_video_decoder_decide_allocation_default (GstVideoDecoder * decoder,
GstQuery * query)
{
GstCaps *outcaps;
GstBufferPool *pool = NULL;
guint size, min, max;
GstAllocator *allocator = NULL;
GstAllocationParams params;
GstStructure *config;
gboolean update_pool, update_allocator;
GstVideoInfo vinfo;
gst_query_parse_allocation (query, &outcaps, NULL);
gst_video_info_init (&vinfo);
gst_video_info_from_caps (&vinfo, outcaps);
/* we got configuration from our peer or the decide_allocation method,
* parse them */
if (gst_query_get_n_allocation_params (query) > 0) {
/* try the allocator */
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
update_allocator = TRUE;
} else {
allocator = NULL;
gst_allocation_params_init (&params);
update_allocator = FALSE;
}
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
size = MAX (size, vinfo.size);
update_pool = TRUE;
} else {
pool = NULL;
size = vinfo.size;
min = max = 0;
update_pool = FALSE;
}
if (pool == NULL) {
/* no pool, we can make our own */
GST_DEBUG_OBJECT (decoder, "no pool, making new pool");
pool = gst_video_buffer_pool_new ();
}
/* now configure */
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, outcaps, size, min, max);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
gst_buffer_pool_set_config (pool, config);
if (update_allocator)
gst_query_set_nth_allocation_param (query, 0, allocator, &params);
else
gst_query_add_allocation_param (query, allocator, &params);
if (allocator)
gst_allocator_unref (allocator);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
if (pool)
gst_object_unref (pool);
return TRUE;
}
/**
* gst_video_decoder_set_src_caps:
* @decoder: a #GstVideoDecoder
*
* Sets src pad caps according to currently configured #GstVideoCodecState.
*
* Returns: #TRUE if the caps were accepted downstream, else #FALSE.
*
* Since: 0.10.36
*/
static gboolean
gst_video_decoder_set_src_caps (GstVideoDecoder * decoder)
{
GstVideoCodecState *state = decoder->priv->output_state;
GstVideoDecoderClass *klass;
GstQuery *query = NULL;
GstBufferPool *pool = NULL;
GstAllocator *allocator;
GstAllocationParams params;
gboolean ret = TRUE;
g_return_val_if_fail (GST_VIDEO_INFO_WIDTH (&state->info) != 0, FALSE);
g_return_val_if_fail (GST_VIDEO_INFO_HEIGHT (&state->info) != 0, FALSE);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
GST_DEBUG_OBJECT (decoder, "output_state par %d/%d fps %d/%d",
state->info.par_n, state->info.par_d,
state->info.fps_n, state->info.fps_d);
if (G_UNLIKELY (state->caps == NULL))
state->caps = gst_video_info_to_caps (&state->info);
GST_DEBUG_OBJECT (decoder, "setting caps %" GST_PTR_FORMAT, state->caps);
ret = gst_pad_set_caps (decoder->srcpad, state->caps);
if (!ret)
goto done;
decoder->priv->output_state_changed = FALSE;
/* Negotiate pool */
query = gst_query_new_allocation (state->caps, TRUE);
if (!gst_pad_peer_query (decoder->srcpad, query)) {
GST_DEBUG_OBJECT (decoder, "didn't get downstream ALLOCATION hints");
}
g_assert (klass->decide_allocation != NULL);
ret = klass->decide_allocation (decoder, query);
GST_DEBUG_OBJECT (decoder, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, ret,
query);
if (!ret)
goto no_decide_allocation;
/* we got configuration from our peer or the decide_allocation method,
* parse them */
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
} else {
allocator = NULL;
gst_allocation_params_init (&params);
}
if (gst_query_get_n_allocation_pools (query) > 0)
gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
if (!pool) {
if (allocator)
gst_allocator_unref (allocator);
ret = FALSE;
goto no_decide_allocation;
}
if (decoder->priv->allocator)
gst_allocator_unref (decoder->priv->allocator);
decoder->priv->allocator = allocator;
decoder->priv->params = params;
if (decoder->priv->pool) {
gst_buffer_pool_set_active (decoder->priv->pool, FALSE);
gst_object_unref (decoder->priv->pool);
}
decoder->priv->pool = pool;
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
done:
if (query)
gst_query_unref (query);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
/* Errors */
no_decide_allocation:
{
GST_WARNING_OBJECT (decoder, "Subclass failed to decide allocation");
goto done;
}
}
/**
* gst_video_decoder_alloc_output_buffer:
* @decoder: a #GstVideoDecoder
*
* Helper function that allocates a buffer to hold a video frame for @decoder's
* current #GstVideoCodecState.
*
* Returns: (transfer full): allocated buffer
*
* Since: 0.10.36
*/
GstBuffer *
gst_video_decoder_alloc_output_buffer (GstVideoDecoder * decoder)
{
GstBuffer *buffer;
GST_DEBUG ("alloc src buffer");
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (G_UNLIKELY (decoder->priv->output_state_changed
|| (decoder->priv->output_state
&& gst_pad_check_reconfigure (decoder->srcpad))))
gst_video_decoder_set_src_caps (decoder);
gst_buffer_pool_acquire_buffer (decoder->priv->pool, &buffer, NULL);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return buffer;
}
/**
* gst_video_decoder_alloc_output_frame:
* @decoder: a #GstVideoDecoder
* @frame: a #GstVideoCodecFrame
*
* Helper function that allocates a buffer to hold a video frame for @decoder's
* current #GstVideoCodecState. Subclass should already have configured video
* state and set src pad caps.
*
* Returns: %GST_FLOW_OK if an output buffer could be allocated
*
* Since: 0.10.36
*/
GstFlowReturn
gst_video_decoder_alloc_output_frame (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame)
{
GstFlowReturn flow_ret;
GstVideoCodecState *state = decoder->priv->output_state;
int num_bytes = GST_VIDEO_INFO_SIZE (&state->info);
g_return_val_if_fail (num_bytes != 0, GST_FLOW_ERROR);
if (G_UNLIKELY (decoder->priv->output_state_changed
|| (decoder->priv->output_state
&& gst_pad_check_reconfigure (decoder->srcpad))))
gst_video_decoder_set_src_caps (decoder);
GST_LOG_OBJECT (decoder, "alloc buffer size %d", num_bytes);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
flow_ret = gst_buffer_pool_acquire_buffer (decoder->priv->pool,
&frame->output_buffer, NULL);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return flow_ret;
}
/**
* gst_video_decoder_get_max_decode_time:
* @decoder: a #GstVideoDecoder
* @frame: a #GstVideoCodecFrame
*
* Determines maximum possible decoding time for @frame that will
* allow it to decode and arrive in time (as determined by QoS events).
* In particular, a negative result means decoding in time is no longer possible
* and should therefore occur as soon/skippy as possible.
*
* Returns: max decoding time.
*
* Since: 0.10.36
*/
GstClockTimeDiff
gst_video_decoder_get_max_decode_time (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame)
{
GstClockTimeDiff deadline;
GstClockTime earliest_time;
GST_OBJECT_LOCK (decoder);
earliest_time = decoder->priv->earliest_time;
if (GST_CLOCK_TIME_IS_VALID (earliest_time))
deadline = GST_CLOCK_DIFF (earliest_time, frame->deadline);
else
deadline = G_MAXINT64;
GST_LOG_OBJECT (decoder, "earliest %" GST_TIME_FORMAT
", frame deadline %" GST_TIME_FORMAT ", deadline %" GST_TIME_FORMAT,
GST_TIME_ARGS (earliest_time), GST_TIME_ARGS (frame->deadline),
GST_TIME_ARGS (deadline));
GST_OBJECT_UNLOCK (decoder);
return deadline;
}
GstFlowReturn
_gst_video_decoder_error (GstVideoDecoder * dec, gint weight,
GQuark domain, gint code, gchar * txt, gchar * dbg, const gchar * file,
const gchar * function, gint line)
{
if (txt)
GST_WARNING_OBJECT (dec, "error: %s", txt);
if (dbg)
GST_WARNING_OBJECT (dec, "error: %s", dbg);
dec->priv->error_count += weight;
dec->priv->discont = TRUE;
if (dec->priv->max_errors < dec->priv->error_count) {
gst_element_message_full (GST_ELEMENT (dec), GST_MESSAGE_ERROR,
domain, code, txt, dbg, file, function, line);
return GST_FLOW_ERROR;
} else {
return GST_FLOW_OK;
}
}
/**
* gst_video_decoder_set_max_errors:
* @dec: a #GstVideoDecoder
* @num: max tolerated errors
*
* Sets numbers of tolerated decoder errors, where a tolerated one is then only
* warned about, but more than tolerated will lead to fatal error. Default
* is set to GST_VIDEO_DECODER_MAX_ERRORS.
*
* Since: 0.10.36
*/
void
gst_video_decoder_set_max_errors (GstVideoDecoder * dec, gint num)
{
g_return_if_fail (GST_IS_VIDEO_DECODER (dec));
dec->priv->max_errors = num;
}
/**
* gst_video_decoder_get_max_errors:
* @dec: a #GstVideoDecoder
*
* Returns: currently configured decoder tolerated error count.
*
* Since: 0.10.36
*/
gint
gst_video_decoder_get_max_errors (GstVideoDecoder * dec)
{
g_return_val_if_fail (GST_IS_VIDEO_DECODER (dec), 0);
return dec->priv->max_errors;
}
/**
* gst_video_decoder_set_packetized:
* @decoder: a #GstVideoDecoder
* @packetized: whether the input data should be considered as packetized.
*
* Allows baseclass to consider input data as packetized or not. If the
* input is packetized, then the @parse method will not be called.
*
* Since: 0.10.36
*/
void
gst_video_decoder_set_packetized (GstVideoDecoder * decoder,
gboolean packetized)
{
decoder->priv->packetized = packetized;
}
/**
* gst_video_decoder_get_packetized:
* @decoder: a #GstVideoDecoder
*
* Queries whether input data is considered packetized or not by the
* base class.
*
* Returns: TRUE if input data is considered packetized.
*
* Since: 0.10.36
*/
gboolean
gst_video_decoder_get_packetized (GstVideoDecoder * decoder)
{
return decoder->priv->packetized;
}
/**
* gst_video_decoder_set_estimate_rate:
* @dec: a #GstVideoDecoder
* @enabled: whether to enable byte to time conversion
*
* Allows baseclass to perform byte to time estimated conversion.
*
* Since: 0.10.36
*/
void
gst_video_decoder_set_estimate_rate (GstVideoDecoder * dec, gboolean enabled)
{
g_return_if_fail (GST_IS_VIDEO_DECODER (dec));
dec->priv->do_estimate_rate = enabled;
}
/**
* gst_video_decoder_get_estimate_rate:
* @dec: a #GstVideoDecoder
*
* Returns: currently configured byte to time conversion setting
*
* Since: 0.10.36
*/
gboolean
gst_video_decoder_get_estimate_rate (GstVideoDecoder * dec)
{
g_return_val_if_fail (GST_IS_VIDEO_DECODER (dec), 0);
return dec->priv->do_estimate_rate;
}
/**
* gst_video_decoder_set_latency:
* @decoder: a #GstVideoDecoder
* @min_latency: minimum latency
* @max_latency: maximum latency
*
* Lets #GstVideoDecoder sub-classes tell the baseclass what the decoder
* latency is. Will also post a LATENCY message on the bus so the pipeline
* can reconfigure its global latency.
*
* Since: 0.10.36
*/
void
gst_video_decoder_set_latency (GstVideoDecoder * decoder,
GstClockTime min_latency, GstClockTime max_latency)
{
g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
g_return_if_fail (max_latency >= min_latency);
GST_OBJECT_LOCK (decoder);
decoder->priv->min_latency = min_latency;
decoder->priv->max_latency = max_latency;
GST_OBJECT_UNLOCK (decoder);
gst_element_post_message (GST_ELEMENT_CAST (decoder),
gst_message_new_latency (GST_OBJECT_CAST (decoder)));
}
/**
* gst_video_decoder_get_latency:
* @decoder: a #GstVideoDecoder
* @min_latency: (out) (allow-none): address of variable in which to store the
* configured minimum latency, or %NULL
* @max_latency: (out) (allow-none): address of variable in which to store the
* configured mximum latency, or %NULL
*
* Query the configured decoder latency. Results will be returned via
* @min_latency and @max_latency.
*
* Since: 0.10.36
*/
void
gst_video_decoder_get_latency (GstVideoDecoder * decoder,
GstClockTime * min_latency, GstClockTime * max_latency)
{
GST_OBJECT_LOCK (decoder);
if (min_latency)
*min_latency = decoder->priv->min_latency;
if (max_latency)
*max_latency = decoder->priv->max_latency;
GST_OBJECT_UNLOCK (decoder);
}
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