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gstreamer/gst-libs/gst/video/gstvideodecoder.c

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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, 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.
*
* The GstVideoDecoder base class and derived subclasses should cooperate as
* follows:
* <orderedlist>
* <listitem>
* <itemizedlist><title>Configuration</title>
* <listitem><para>
* Initially, GstVideoDecoder calls @start when the decoder element
* is activated, which allows the subclass to perform any global setup.
* </para></listitem>
* <listitem><para>
* GstVideoDecoder calls @set_format to inform the 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>
* Incoming data buffers are processed as needed, described in Data
* Processing below.
* </para></listitem>
* <listitem><para>
* GstVideoDecoder calls @stop at end of all processing.
* </para></listitem>
* </itemizedlist>
* </listitem>
* <listitem>
* <itemizedlist>
* <title>Data processing</title>
* <listitem><para>
* The 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>
* Each input frame is provided in turn to the subclass' @handle_frame
* callback.
* The ownership of the frame is given to the @handle_frame callback.
* </para></listitem>
* <listitem><para>
* If codec processing results in decoded data, the subclass should call
* @gst_video_decoder_finish_frame to have decoded data pushed.
* downstream. Otherwise, the subclass must call
* @gst_video_decoder_drop_frame, to allow the base class to do timestamp
* and offset tracking, and possibly to requeue the frame for a later
* attempt in the case of reverse playback.
* </para></listitem>
* </itemizedlist>
* </listitem>
* <listitem>
* <itemizedlist><title>Shutdown phase</title>
* <listitem><para>
* The GstVideoDecoder class calls @stop to inform the subclass that data
* parsing will be stopped.
* </para></listitem>
* </itemizedlist>
* </listitem>
* <listitem>
* <itemizedlist><title>Additional Notes</title>
* <listitem>
* <itemizedlist><title>Seeking/Flushing</title>
* <listitem><para>
* When the pipeline is seeked or otherwise flushed, the subclass is
* informed via a call to its @reset callback, with the hard parameter
* set to true. This indicates the subclass should drop any internal data
* queues and timestamps and prepare for a fresh set of buffers to arrive
* for parsing and decoding.
* </para></listitem>
* </itemizedlist>
* </listitem>
* <listitem>
* <itemizedlist><title>End Of Stream</title>
* <listitem><para>
* At end-of-stream, the subclass @parse function may be called some final
* times with the at_eos parameter set to true, indicating that the element
* should not expect any more data to be arriving, and it should parse and
* remaining frames and call gst_video_decoder_have_frame() if possible.
* </para></listitem>
* </itemizedlist>
* </listitem>
* </itemizedlist>
* </listitem>
* </orderedlist>
*
* The 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 provide information about the ouptput caps, when they are known.
* This may be when the base class calls the subclass' @set_format function,
* though it might be during decoding, before calling
* @gst_video_decoder_finish_frame. This is done via
* @gst_video_decoder_set_output_state
*
* The subclass is also responsible for providing (presentation) timestamps
* (likely based on corresponding input ones). If that is not applicable
* or possible, the base class provides limited framerate based interpolation.
*
* Similarly, the base class provides some limited (legacy) seeking support
* if specifically requested by the subclass, 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. To enable it, a subclass should call
* @gst_video_decoder_set_estimate_rate to enable handling of incoming
* byte-streams.
*
* The base class 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, the subclass should then be
* prepared for the parsing and frame processing stage to occur separately
* (in normal forward processing, the latter immediately follows the former),
* The subclass also needs to ensure the parsing stage properly marks
* keyframes, unless it knows the upstream elements will do so properly for
* incoming data.
*
* The bare minimum that a functional subclass needs to implement is:
* <itemizedlist>
* <listitem><para>Provide pad templates</para></listitem>
* <listitem><para>
* Inform the base class of output caps via
* @gst_video_decoder_set_output_state
* </para></listitem>
* <listitem><para>
* Parse input data, if it is not considered packetized from upstream
* Data will be provided to @parse which should invoke
* @gst_video_decoder_add_to_frame and @gst_video_decoder_have_frame to
* separate the data belonging to each video frame.
* </para></listitem>
* <listitem><para>
* Accept data in @handle_frame and provide decoded results to
* @gst_video_decoder_finish_frame, or call @gst_video_decoder_drop_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
*
*/
/* Implementation notes:
* The Video Decoder base class operates in 2 primary processing modes, depending
* on whether forward or reverse playback is requested.
*
* Forward playback:
* * Incoming buffer -> @parse() -> add_to_frame()/have_frame() ->
* handle_frame() -> push downstream
*
* Reverse playback is more complicated, since it involves gathering incoming
* data regions as we loop backwards through the upstream data. The processing
* concept (using incoming buffers as containing one frame each to simplify
* things) is:
*
* Upstream data we want to play:
* Buffer encoded order: 1 2 3 4 5 6 7 8 9 EOS
* Keyframe flag: K K
* Groupings: AAAAAAA BBBBBBB CCCCCCC
*
* Input:
* Buffer reception order: 7 8 9 4 5 6 1 2 3 EOS
* Keyframe flag: K K
* Discont flag: D D D
*
* - Each Discont marks a discont in the decoding order.
* - The keyframes mark where we can start decoding.
*
* Initially, we prepend incoming buffers to the gather queue. Whenever the
* discont flag is set on an incoming buffer, the gather queue is flushed out
* before the new buffer is collected.
*
* The above data will be accumulated in the gather queue like this:
*
* gather queue: 9 8 7
* D
*
* Whe buffer 4 is received (with a DISCONT), we flush the gather queue like
* this:
*
* while (gather)
* take head of queue and prepend to parse queue (this reverses the
* sequence, so parse queue is 7 -> 8 -> 9)
*
* Next, we process the parse queue, which now contains all un-parsed packets
* (including any leftover ones from the previous decode section)
*
* for each buffer now in the parse queue:
* Call the subclass parse function, prepending each resulting frame to
* the parse_gather queue. Buffers which precede the first one that
* produces a parsed frame are retained in the parse queue for
* re-processing on the next cycle of parsing.
*
* The parse_gather queue now contains frame objects ready for decoding,
* in reverse order.
* parse_gather: 9 -> 8 -> 7
*
* while (parse_gather)
* Take the head of the queue and prepend it to the decode queue
* If the frame was a keyframe, process the decode queue
* decode is now 7-8-9
*
* Processing the decode queue results in frames with attached output buffers
* stored in the 'output_queue' ready for outputting in reverse order.
*
* After we flushed the gather queue and parsed it, we add 4 to the (now empty)
* gather queue. We get the following situation:
*
* gather queue: 4
* decode queue: 7 8 9
*
* After we received 5 (Keyframe) and 6:
*
* gather queue: 6 5 4
* decode queue: 7 8 9
*
* When we receive 1 (DISCONT) which triggers a flush of the gather queue:
*
* Copy head of the gather queue (6) to decode queue:
*
* gather queue: 5 4
* decode queue: 6 7 8 9
*
* Copy head of the gather queue (5) to decode queue. This is a keyframe so we
* can start decoding.
*
* gather queue: 4
* decode queue: 5 6 7 8 9
*
* Decode frames in decode queue, store raw decoded data in output queue, we
* can take the head of the decode queue and prepend the decoded result in the
* output queue:
*
* gather queue: 4
* decode queue:
* output queue: 9 8 7 6 5
*
* Now output all the frames in the output queue, picking a frame from the
* head of the queue.
*
* Copy head of the gather queue (4) to decode queue, we flushed the gather
* queue and can now store input buffer in the gather queue:
*
* gather queue: 1
* decode queue: 4
*
* When we receive EOS, the queue looks like:
*
* gather queue: 3 2 1
* decode queue: 4
*
* Fill decode queue, first keyframe we copy is 2:
*
* gather queue: 1
* decode queue: 2 3 4
*
* Decoded output:
*
* gather queue: 1
* decode queue:
* output queue: 4 3 2
*
* Leftover buffer 1 cannot be decoded and must be discarded.
*/
#include "gstvideodecoder.h"
#include "gstvideoutils.h"
#include "gstvideoutilsprivate.h"
#include <gst/video/video.h>
#include <gst/video/video-event.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;
gboolean had_output_data;
gboolean had_input_data;
gboolean needs_format;
/* input_segment are output_segment identical */
gboolean in_out_segment_sync;
/* ... being tracked here;
* only available during parsing */
GstVideoCodecFrame *current_frame;
/* events that should apply to the current frame */
GList *current_frame_events;
/* events that should be pushed before the next frame */
GList *pending_events;
/* relative offset of input data */
guint64 input_offset;
/* relative offset of frame */
guint64 frame_offset;
/* tracking ts and offsets */
GList *timestamps;
/* last outgoing ts */
GstClockTime last_timestamp_out;
/* incoming pts - dts */
GstClockTime pts_delta;
gboolean reordered_output;
/* 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 - of buffer objects, not frames */
GList *output_queued;
/* base_picture_number is the picture number of the reference picture */
guint64 base_picture_number;
/* combine with base_picture_number, framerate and calcs to yield (presentation) ts */
GstClockTime base_timestamp;
/* FIXME : reorder_depth is never set */
int reorder_depth;
int distance_from_sync;
guint32 system_frame_number;
guint32 decode_frame_number;
GList *frames; /* Protected with OBJECT_LOCK */
GstVideoCodecState *input_state;
GstVideoCodecState *output_state; /* OBJECT_LOCK and STREAM_LOCK */
gboolean output_state_changed;
/* QoS properties */
gdouble proportion; /* OBJECT_LOCK */
GstClockTime earliest_time; /* OBJECT_LOCK */
GstClockTime qos_frame_duration; /* OBJECT_LOCK */
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;
/* upstream stream tags (global tags are passed through as-is) */
GstTagList *upstream_tags;
/* subclass tags */
GstTagList *tags;
GstTagMergeMode tags_merge_mode;
gboolean tags_changed;
/* flags */
gboolean use_default_pad_acceptcaps;
};
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,
gboolean flush_hard);
static GstFlowReturn gst_video_decoder_decode_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static void gst_video_decoder_push_event_list (GstVideoDecoder * decoder,
GList * events);
static GstClockTime gst_video_decoder_get_frame_duration (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame);
static GstVideoCodecFrame *gst_video_decoder_new_frame (GstVideoDecoder *
decoder);
static GstFlowReturn gst_video_decoder_clip_and_push_buf (GstVideoDecoder *
decoder, GstBuffer * buf);
static GstFlowReturn gst_video_decoder_flush_parse (GstVideoDecoder * dec,
gboolean at_eos);
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);
static gboolean gst_video_decoder_propose_allocation_default (GstVideoDecoder *
decoder, GstQuery * query);
static gboolean gst_video_decoder_negotiate_default (GstVideoDecoder * decoder);
static GstFlowReturn gst_video_decoder_parse_available (GstVideoDecoder * dec,
gboolean at_eos, gboolean new_buffer);
static gboolean gst_video_decoder_negotiate_unlocked (GstVideoDecoder *
decoder);
static gboolean gst_video_decoder_sink_query_default (GstVideoDecoder * decoder,
GstQuery * query);
static gboolean gst_video_decoder_src_query_default (GstVideoDecoder * decoder,
GstQuery * query);
static gboolean gst_video_decoder_transform_meta_default (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame, GstMeta * meta);
/* 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;
klass->propose_allocation = gst_video_decoder_propose_allocation_default;
klass->negotiate = gst_video_decoder_negotiate_default;
klass->sink_query = gst_video_decoder_sink_query_default;
klass->src_query = gst_video_decoder_src_query_default;
klass->transform_meta = gst_video_decoder_transform_meta_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_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;
decoder->priv->needs_format = FALSE;
decoder->priv->min_latency = 0;
decoder->priv->max_latency = 0;
gst_video_decoder_reset (decoder, TRUE, 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 bytes */
*dest_value = gst_util_uint64_scale (src_value,
fps_n * (guint64) vidsize, GST_SECOND * fps_d);
res = TRUE;
} else if (src_format == GST_FORMAT_BYTES &&
*dest_format == GST_FORMAT_TIME && fps_n && vidsize) {
/* convert bytes to time */
*dest_value = gst_util_uint64_scale (src_value,
GST_SECOND * fps_d, fps_n * (guint64) 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;
/* only copy values that are not unknown so that we don't override the
* defaults. subclasses should really fill these in when they know. */
if (ref->chroma_site)
tgt->chroma_site = ref->chroma_site;
if (ref->colorimetry.range)
tgt->colorimetry.range = ref->colorimetry.range;
if (ref->colorimetry.matrix)
tgt->colorimetry.matrix = ref->colorimetry.matrix;
if (ref->colorimetry.transfer)
tgt->colorimetry.transfer = ref->colorimetry.transfer;
if (ref->colorimetry.primaries)
tgt->colorimetry.primaries = ref->colorimetry.primaries;
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;
tgt->views = ref->views;
if (GST_VIDEO_INFO_MULTIVIEW_MODE (ref) != GST_VIDEO_MULTIVIEW_MODE_NONE) {
GST_VIDEO_INFO_MULTIVIEW_MODE (tgt) = GST_VIDEO_INFO_MULTIVIEW_MODE (ref);
GST_VIDEO_INFO_MULTIVIEW_FLAGS (tgt) =
GST_VIDEO_INFO_MULTIVIEW_FLAGS (ref);
}
}
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);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (decoder->priv->input_state) {
GST_DEBUG_OBJECT (decoder,
"Checking if caps changed old %" GST_PTR_FORMAT " new %" GST_PTR_FORMAT,
decoder->priv->input_state->caps, caps);
if (gst_caps_is_equal (decoder->priv->input_state->caps, caps))
goto caps_not_changed;
}
state = _new_input_state (caps);
if (G_UNLIKELY (state == NULL))
goto parse_fail;
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;
caps_not_changed:
{
GST_DEBUG_OBJECT (decoder, "Caps did not change - ignore");
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return TRUE;
}
/* ERRORS */
parse_fail:
{
GST_WARNING_OBJECT (decoder, "Failed to parse caps");
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
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_object_unref (decoder->priv->allocator);
decoder->priv->allocator = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* hard == FLUSH, otherwise discont */
static GstFlowReturn
gst_video_decoder_flush (GstVideoDecoder * dec, gboolean hard)
{
GstVideoDecoderClass *klass = GST_VIDEO_DECODER_GET_CLASS (dec);
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (dec, "flush hard %d", hard);
/* Inform subclass */
if (klass->reset) {
GST_FIXME_OBJECT (dec, "GstVideoDecoder::reset() is deprecated");
klass->reset (dec, hard);
}
if (klass->flush)
klass->flush (dec);
/* and get (re)set for the sequel */
gst_video_decoder_reset (dec, FALSE, hard);
return ret;
}
static GstEvent *
gst_video_decoder_create_merged_tags_event (GstVideoDecoder * dec)
{
GstTagList *merged_tags;
GST_LOG_OBJECT (dec, "upstream : %" GST_PTR_FORMAT, dec->priv->upstream_tags);
GST_LOG_OBJECT (dec, "decoder : %" GST_PTR_FORMAT, dec->priv->tags);
GST_LOG_OBJECT (dec, "mode : %d", dec->priv->tags_merge_mode);
merged_tags =
gst_tag_list_merge (dec->priv->upstream_tags, dec->priv->tags,
dec->priv->tags_merge_mode);
GST_DEBUG_OBJECT (dec, "merged : %" GST_PTR_FORMAT, merged_tags);
if (merged_tags == NULL)
return NULL;
if (gst_tag_list_is_empty (merged_tags)) {
gst_tag_list_unref (merged_tags);
return NULL;
}
return gst_event_new_tag (merged_tags);
}
static gboolean
gst_video_decoder_push_event (GstVideoDecoder * decoder, GstEvent * event)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
GstSegment segment;
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");
break;
}
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
decoder->output_segment = segment;
decoder->priv->in_out_segment_sync =
gst_segment_is_equal (&decoder->input_segment, &segment);
decoder->priv->last_timestamp_out = GST_CLOCK_TIME_NONE;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
}
default:
break;
}
GST_DEBUG_OBJECT (decoder, "pushing event %s",
gst_event_type_get_name (GST_EVENT_TYPE (event)));
return gst_pad_push_event (decoder->srcpad, event);
}
static GstFlowReturn
gst_video_decoder_parse_available (GstVideoDecoder * dec, gboolean at_eos,
gboolean new_buffer)
{
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_GET_CLASS (dec);
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn ret = GST_FLOW_OK;
gsize was_available, available;
guint inactive = 0;
available = gst_adapter_available (priv->input_adapter);
while (available || new_buffer) {
new_buffer = FALSE;
/* current frame may have been parsed and handled,
* so we need to set up a new one when asking subclass to parse */
if (priv->current_frame == NULL)
priv->current_frame = gst_video_decoder_new_frame (dec);
was_available = available;
ret = decoder_class->parse (dec, priv->current_frame,
priv->input_adapter, at_eos);
if (ret != GST_FLOW_OK)
break;
/* if the subclass returned success (GST_FLOW_OK), it is expected
* to have collected and submitted a frame, i.e. it should have
* called gst_video_decoder_have_frame(), or at least consumed a
* few bytes through gst_video_decoder_add_to_frame().
*
* Otherwise, this is an implementation bug, and we error out
* after 2 failed attempts */
available = gst_adapter_available (priv->input_adapter);
if (!priv->current_frame || available != was_available)
inactive = 0;
else if (++inactive == 2)
goto error_inactive;
}
return ret;
/* ERRORS */
error_inactive:
{
GST_ERROR_OBJECT (dec, "Failed to consume data. Error in subclass?");
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_video_decoder_drain_out (GstVideoDecoder * dec, gboolean at_eos)
{
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_GET_CLASS (dec);
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn ret = GST_FLOW_OK;
GST_VIDEO_DECODER_STREAM_LOCK (dec);
if (dec->input_segment.rate > 0.0) {
/* Forward mode, if unpacketized, give the child class
* a final chance to flush out packets */
if (!priv->packetized) {
ret = gst_video_decoder_parse_available (dec, TRUE, FALSE);
}
if (at_eos) {
if (decoder_class->finish)
ret = decoder_class->finish (dec);
} else {
if (decoder_class->drain) {
ret = decoder_class->drain (dec);
} else {
GST_FIXME_OBJECT (dec, "Sub-class should implement drain()");
}
}
} else {
/* Reverse playback mode */
ret = gst_video_decoder_flush_parse (dec, TRUE);
}
GST_VIDEO_DECODER_STREAM_UNLOCK (dec);
return ret;
}
static GList *
_flush_events (GstPad * pad, GList * events)
{
GList *tmp;
for (tmp = events; tmp; tmp = tmp->next) {
if (GST_EVENT_TYPE (tmp->data) != GST_EVENT_EOS &&
GST_EVENT_TYPE (tmp->data) != GST_EVENT_SEGMENT &&
GST_EVENT_IS_STICKY (tmp->data)) {
gst_pad_store_sticky_event (pad, GST_EVENT_CAST (tmp->data));
}
gst_event_unref (tmp->data);
}
g_list_free (events);
return NULL;
}
/* Must be called holding the GST_VIDEO_DECODER_STREAM_LOCK */
static gboolean
gst_video_decoder_negotiate_default_caps (GstVideoDecoder * decoder)
{
GstCaps *caps, *templcaps;
GstVideoCodecState *state;
GstVideoInfo info;
gint i;
gint caps_size;
GstStructure *structure;
templcaps = gst_pad_get_pad_template_caps (decoder->srcpad);
caps = gst_pad_peer_query_caps (decoder->srcpad, templcaps);
if (caps)
gst_caps_unref (templcaps);
else
caps = templcaps;
templcaps = NULL;
if (!caps || gst_caps_is_empty (caps) || gst_caps_is_any (caps))
goto caps_error;
GST_LOG_OBJECT (decoder, "peer caps %" GST_PTR_FORMAT, caps);
/* before fixating, try to use whatever upstream provided */
caps = gst_caps_make_writable (caps);
caps_size = gst_caps_get_size (caps);
if (decoder->priv->input_state && decoder->priv->input_state->caps) {
GstCaps *sinkcaps = decoder->priv->input_state->caps;
GstStructure *structure = gst_caps_get_structure (sinkcaps, 0);
gint width, height;
gint par_n, par_d;
gint fps_n, fps_d;
if (gst_structure_get_int (structure, "width", &width)) {
for (i = 0; i < caps_size; i++) {
gst_structure_set (gst_caps_get_structure (caps, i), "width",
G_TYPE_INT, width, NULL);
}
}
if (gst_structure_get_int (structure, "height", &height)) {
for (i = 0; i < caps_size; i++) {
gst_structure_set (gst_caps_get_structure (caps, i), "height",
G_TYPE_INT, height, NULL);
}
}
if (gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d)) {
for (i = 0; i < caps_size; i++) {
gst_structure_set (gst_caps_get_structure (caps, i), "framerate",
GST_TYPE_FRACTION, fps_n, fps_d, NULL);
}
}
if (gst_structure_get_fraction (structure, "pixel-aspect-ratio", &par_n,
&par_d)) {
for (i = 0; i < caps_size; i++) {
gst_structure_set (gst_caps_get_structure (caps, i),
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
}
}
}
for (i = 0; i < caps_size; i++) {
structure = gst_caps_get_structure (caps, i);
/* Random 1280x720@30 for fixation */
gst_structure_fixate_field_nearest_int (structure, "width", 1280);
gst_structure_fixate_field_nearest_int (structure, "height", 720);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
if (gst_structure_has_field (structure, "pixel-aspect-ratio")) {
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
} else {
gst_structure_set (structure, "pixel-aspect-ratio", GST_TYPE_FRACTION,
1, 1, NULL);
}
}
caps = gst_caps_fixate (caps);
structure = gst_caps_get_structure (caps, 0);
if (!caps || !gst_video_info_from_caps (&info, caps))
goto caps_error;
GST_INFO_OBJECT (decoder,
"Chose default caps %" GST_PTR_FORMAT " for initial gap", caps);
state =
gst_video_decoder_set_output_state (decoder, info.finfo->format,
info.width, info.height, decoder->priv->input_state);
gst_video_codec_state_unref (state);
gst_caps_unref (caps);
return TRUE;
caps_error:
{
if (caps)
gst_caps_unref (caps);
return FALSE;
}
}
static gboolean
gst_video_decoder_sink_event_default (GstVideoDecoder * decoder,
GstEvent * event)
{
GstVideoDecoderPrivate *priv;
gboolean ret = FALSE;
gboolean forward_immediate = FALSE;
priv = decoder->priv;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:
{
GstFlowReturn flow_ret = GST_FLOW_OK;
flow_ret = gst_video_decoder_drain_out (decoder, FALSE);
ret = (flow_ret == GST_FLOW_OK);
GST_DEBUG_OBJECT (decoder, "received STREAM_START. Clearing taglist");
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
/* Flush upstream tags after a STREAM_START */
if (priv->upstream_tags) {
gst_tag_list_unref (priv->upstream_tags);
priv->upstream_tags = NULL;
priv->tags_changed = TRUE;
}
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
/* Forward STREAM_START immediately. Everything is drained after
* the STREAM_START event and we can forward this event immediately
* now without having buffers out of order.
*/
forward_immediate = TRUE;
break;
}
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_SEGMENT_DONE:
{
GstFlowReturn flow_ret = GST_FLOW_OK;
flow_ret = gst_video_decoder_drain_out (decoder, TRUE);
ret = (flow_ret == GST_FLOW_OK);
/* Forward SEGMENT_DONE immediately. This is required
* because no buffer or serialized event might come
* after SEGMENT_DONE and nothing could trigger another
* _finish_frame() call.
*
* The subclass can override this behaviour by overriding
* the ::sink_event() vfunc and not chaining up to the
* parent class' ::sink_event() until a later time.
*/
forward_immediate = TRUE;
break;
}
case GST_EVENT_EOS:
{
GstFlowReturn flow_ret = GST_FLOW_OK;
flow_ret = gst_video_decoder_drain_out (decoder, TRUE);
ret = (flow_ret == GST_FLOW_OK);
/* Error out even if EOS was ok when we had input, but no output */
if (ret && priv->had_input_data && !priv->had_output_data) {
GST_ELEMENT_ERROR (decoder, STREAM, DECODE,
("No valid frames decoded before end of stream"),
("no valid frames found"));
}
/* Forward EOS immediately. This is required because no
* buffer or serialized event will come after EOS and
* nothing could trigger another _finish_frame() call.
*
* The subclass can override this behaviour by overriding
* the ::sink_event() vfunc and not chaining up to the
* parent class' ::sink_event() until a later time.
*/
forward_immediate = TRUE;
break;
}
case GST_EVENT_GAP:
{
GstFlowReturn flow_ret = GST_FLOW_OK;
gboolean needs_reconfigure = FALSE;
GList *events;
GList *frame_events;
flow_ret = gst_video_decoder_drain_out (decoder, FALSE);
ret = (flow_ret == GST_FLOW_OK);
/* Ensure we have caps before forwarding the event */
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (!decoder->priv->output_state) {
if (!gst_video_decoder_negotiate_default_caps (decoder)) {
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
GST_ELEMENT_ERROR (decoder, STREAM, FORMAT, (NULL),
("Decoder output not negotiated before GAP event."));
forward_immediate = TRUE;
break;
}
needs_reconfigure = TRUE;
}
needs_reconfigure = gst_pad_check_reconfigure (decoder->srcpad)
|| needs_reconfigure;
if (decoder->priv->output_state_changed || needs_reconfigure) {
if (!gst_video_decoder_negotiate_unlocked (decoder)) {
GST_WARNING_OBJECT (decoder, "Failed to negotiate with downstream");
gst_pad_mark_reconfigure (decoder->srcpad);
}
}
GST_DEBUG_OBJECT (decoder, "Pushing all pending serialized events"
" before the gap");
events = decoder->priv->pending_events;
frame_events = decoder->priv->current_frame_events;
decoder->priv->pending_events = NULL;
decoder->priv->current_frame_events = NULL;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
gst_video_decoder_push_event_list (decoder, events);
gst_video_decoder_push_event_list (decoder, frame_events);
/* Forward GAP immediately. Everything is drained after
* the GAP event and we can forward this event immediately
* now without having buffers out of order.
*/
forward_immediate = TRUE;
break;
}
case GST_EVENT_CUSTOM_DOWNSTREAM:
{
gboolean in_still;
GstFlowReturn flow_ret = GST_FLOW_OK;
if (gst_video_event_parse_still_frame (event, &in_still)) {
if (in_still) {
GST_DEBUG_OBJECT (decoder, "draining current data for still-frame");
flow_ret = gst_video_decoder_drain_out (decoder, FALSE);
ret = (flow_ret == GST_FLOW_OK);
}
/* Forward STILL_FRAME immediately. Everything is drained after
* the STILL_FRAME event and we can forward this event immediately
* now without having buffers out of order.
*/
forward_immediate = TRUE;
}
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment segment;
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 {
goto newseg_wrong_format;
}
}
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
priv->base_timestamp = GST_CLOCK_TIME_NONE;
priv->base_picture_number = 0;
decoder->input_segment = segment;
decoder->priv->in_out_segment_sync = FALSE;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
break;
}
case GST_EVENT_FLUSH_STOP:
{
GList *l;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
for (l = priv->frames; l; l = l->next) {
GstVideoCodecFrame *frame = l->data;
frame->events = _flush_events (decoder->srcpad, frame->events);
}
priv->current_frame_events = _flush_events (decoder->srcpad,
decoder->priv->current_frame_events);
/* well, this is kind of worse than a DISCONT */
gst_video_decoder_flush (decoder, TRUE);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
/* Forward FLUSH_STOP immediately. This is required because it is
* expected to be forwarded immediately and no buffers are queued
* anyway.
*/
forward_immediate = TRUE;
break;
}
case GST_EVENT_TAG:
{
GstTagList *tags;
gst_event_parse_tag (event, &tags);
if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (priv->upstream_tags != tags) {
if (priv->upstream_tags)
gst_tag_list_unref (priv->upstream_tags);
priv->upstream_tags = gst_tag_list_ref (tags);
GST_INFO_OBJECT (decoder, "upstream tags: %" GST_PTR_FORMAT, tags);
}
gst_event_unref (event);
event = gst_video_decoder_create_merged_tags_event (decoder);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
if (!event)
ret = TRUE;
}
break;
}
default:
break;
}
/* Forward non-serialized events immediately, and all other
* events which can be forwarded immediately without potentially
* causing the event to go out of order with other events and
* buffers as decided above.
*/
if (event) {
if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
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_SET && 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 start_type, stop_type;
gint64 start, stop;
gint64 tstart, tstop;
guint32 seqnum;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&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, start,
GST_FORMAT_TIME, &tstart)))
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, start_type, tstart, 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;
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)) {
priv->earliest_time = timestamp + 2 * diff + priv->qos_frame_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 ", %" GST_STIME_FORMAT ", %g",
GST_TIME_ARGS (timestamp), GST_STIME_ARGS (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_default (GstVideoDecoder * dec, GstQuery * query)
{
GstPad *pad = GST_VIDEO_DECODER_SRC_PAD (dec);
gboolean res = TRUE;
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_out;
/* 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, GST_OBJECT (dec), 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);
GST_OBJECT_LOCK (dec);
if (dec->priv->output_state != NULL)
res = gst_video_rawvideo_convert (dec->priv->output_state,
src_fmt, src_val, &dest_fmt, &dest_val);
else
res = FALSE;
GST_OBJECT_UNLOCK (dec);
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 qlatency: 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 (max_latency == GST_CLOCK_TIME_NONE
|| dec->priv->max_latency == GST_CLOCK_TIME_NONE)
max_latency = GST_CLOCK_TIME_NONE;
else
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, GST_OBJECT (dec), query);
}
return res;
error:
GST_ERROR_OBJECT (dec, "query failed");
return res;
}
static gboolean
gst_video_decoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
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 query %d, %s", GST_QUERY_TYPE (query),
GST_QUERY_TYPE_NAME (query));
if (decoder_class->src_query)
ret = decoder_class->src_query (decoder, query);
return ret;
}
/**
* gst_video_decoder_proxy_getcaps:
* @decoder: a #GstVideoDecoder
* @caps: (allow-none): initial caps
* @filter: (allow-none): filter caps
*
* Returns caps that express @caps (or sink template caps if @caps == NULL)
* restricted to resolution/format/... combinations supported by downstream
* elements.
*
* Returns: (transfer full): a #GstCaps owned by caller
*
* Since: 1.6
*/
GstCaps *
gst_video_decoder_proxy_getcaps (GstVideoDecoder * decoder, GstCaps * caps,
GstCaps * filter)
{
return __gst_video_element_proxy_getcaps (GST_ELEMENT_CAST (decoder),
GST_VIDEO_DECODER_SINK_PAD (decoder),
GST_VIDEO_DECODER_SRC_PAD (decoder), caps, filter);
}
static GstCaps *
gst_video_decoder_sink_getcaps (GstVideoDecoder * decoder, GstCaps * filter)
{
GstVideoDecoderClass *klass;
GstCaps *caps;
klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
if (klass->getcaps)
caps = klass->getcaps (decoder, filter);
else
caps = gst_video_decoder_proxy_getcaps (decoder, NULL, filter);
GST_LOG_OBJECT (decoder, "Returning caps %" GST_PTR_FORMAT, caps);
return caps;
}
static gboolean
gst_video_decoder_sink_query_default (GstVideoDecoder * decoder,
GstQuery * query)
{
GstPad *pad = GST_VIDEO_DECODER_SINK_PAD (decoder);
GstVideoDecoderPrivate *priv;
gboolean res = FALSE;
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);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
res =
gst_video_encoded_video_convert (priv->bytes_out, priv->time, src_fmt,
src_val, &dest_fmt, &dest_val);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
case GST_QUERY_ALLOCATION:{
GstVideoDecoderClass *klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
if (klass->propose_allocation)
res = klass->propose_allocation (decoder, query);
break;
}
case GST_QUERY_CAPS:{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_video_decoder_sink_getcaps (decoder, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
case GST_QUERY_ACCEPT_CAPS:{
if (decoder->priv->use_default_pad_acceptcaps) {
res =
gst_pad_query_default (GST_VIDEO_DECODER_SINK_PAD (decoder),
GST_OBJECT_CAST (decoder), query);
} else {
GstCaps *caps;
GstCaps *allowed_caps;
GstCaps *template_caps;
gboolean accept;
gst_query_parse_accept_caps (query, &caps);
template_caps = gst_pad_get_pad_template_caps (pad);
accept = gst_caps_is_subset (caps, template_caps);
gst_caps_unref (template_caps);
if (accept) {
allowed_caps =
gst_pad_query_caps (GST_VIDEO_DECODER_SINK_PAD (decoder), caps);
accept = gst_caps_can_intersect (caps, allowed_caps);
gst_caps_unref (allowed_caps);
}
gst_query_set_accept_caps_result (query, accept);
res = TRUE;
}
break;
}
default:
res = gst_pad_query_default (pad, GST_OBJECT (decoder), query);
break;
}
done:
return res;
error:
GST_DEBUG_OBJECT (decoder, "query failed");
goto done;
}
static gboolean
gst_video_decoder_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
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 query %d, %s", GST_QUERY_TYPE (query),
GST_QUERY_TYPE_NAME (query));
if (decoder_class->sink_query)
ret = decoder_class->sink_query (decoder, query);
return ret;
}
typedef struct _Timestamp Timestamp;
struct _Timestamp
{
guint64 offset;
GstClockTime pts;
GstClockTime dts;
GstClockTime duration;
};
static void
timestamp_free (Timestamp * ts)
{
g_slice_free (Timestamp, ts);
}
static void
gst_video_decoder_add_timestamp (GstVideoDecoder * decoder, GstBuffer * buffer)
{
GstVideoDecoderPrivate *priv = decoder->priv;
Timestamp *ts;
ts = g_slice_new (Timestamp);
GST_LOG_OBJECT (decoder,
"adding PTS %" GST_TIME_FORMAT " DTS %" GST_TIME_FORMAT
" (offset:%" G_GUINT64_FORMAT ")",
GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
GST_TIME_ARGS (GST_BUFFER_DTS (buffer)), priv->input_offset);
ts->offset = priv->input_offset;
ts->pts = GST_BUFFER_PTS (buffer);
ts->dts = GST_BUFFER_DTS (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 * pts, GstClockTime * dts,
GstClockTime * duration)
{
#ifndef GST_DISABLE_GST_DEBUG
guint64 got_offset = 0;
#endif
Timestamp *ts;
GList *g;
*pts = GST_CLOCK_TIME_NONE;
*dts = GST_CLOCK_TIME_NONE;
*duration = GST_CLOCK_TIME_NONE;
g = decoder->priv->timestamps;
while (g) {
ts = g->data;
if (ts->offset <= offset) {
#ifndef GST_DISABLE_GST_DEBUG
got_offset = ts->offset;
#endif
*pts = ts->pts;
*dts = ts->dts;
*duration = ts->duration;
g = g->next;
decoder->priv->timestamps = g_list_remove (decoder->priv->timestamps, ts);
timestamp_free (ts);
} else {
break;
}
}
GST_LOG_OBJECT (decoder,
"got PTS %" GST_TIME_FORMAT " DTS %" GST_TIME_FORMAT " @ offs %"
G_GUINT64_FORMAT " (wanted offset:%" G_GUINT64_FORMAT ")",
GST_TIME_ARGS (*pts), GST_TIME_ARGS (*dts), got_offset, offset);
}
static void
gst_video_decoder_clear_queues (GstVideoDecoder * dec)
{
GstVideoDecoderPrivate *priv = dec->priv;
g_list_free_full (priv->output_queued,
(GDestroyNotify) gst_mini_object_unref);
priv->output_queued = NULL;
g_list_free_full (priv->gather, (GDestroyNotify) gst_mini_object_unref);
priv->gather = NULL;
g_list_free_full (priv->decode, (GDestroyNotify) gst_video_codec_frame_unref);
priv->decode = NULL;
g_list_free_full (priv->parse, (GDestroyNotify) gst_mini_object_unref);
priv->parse = NULL;
g_list_free_full (priv->parse_gather,
(GDestroyNotify) gst_video_codec_frame_unref);
priv->parse_gather = NULL;
g_list_free_full (priv->frames, (GDestroyNotify) gst_video_codec_frame_unref);
priv->frames = NULL;
}
static void
gst_video_decoder_reset (GstVideoDecoder * decoder, gboolean full,
gboolean flush_hard)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GST_DEBUG_OBJECT (decoder, "reset full %d", full);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (full || flush_hard) {
gst_segment_init (&decoder->input_segment, GST_FORMAT_UNDEFINED);
gst_segment_init (&decoder->output_segment, GST_FORMAT_UNDEFINED);
gst_video_decoder_clear_queues (decoder);
decoder->priv->in_out_segment_sync = TRUE;
if (priv->current_frame) {
gst_video_codec_frame_unref (priv->current_frame);
priv->current_frame = NULL;
}
g_list_free_full (priv->current_frame_events,
(GDestroyNotify) gst_event_unref);
priv->current_frame_events = NULL;
g_list_free_full (priv->pending_events, (GDestroyNotify) gst_event_unref);
priv->pending_events = NULL;
priv->error_count = 0;
priv->max_errors = GST_VIDEO_DECODER_MAX_ERRORS;
priv->had_output_data = FALSE;
priv->had_input_data = FALSE;
GST_OBJECT_LOCK (decoder);
priv->earliest_time = GST_CLOCK_TIME_NONE;
priv->proportion = 0.5;
GST_OBJECT_UNLOCK (decoder);
}
if (full) {
if (priv->input_state)
gst_video_codec_state_unref (priv->input_state);
priv->input_state = NULL;
GST_OBJECT_LOCK (decoder);
if (priv->output_state)
gst_video_codec_state_unref (priv->output_state);
priv->output_state = NULL;
priv->qos_frame_duration = 0;
GST_OBJECT_UNLOCK (decoder);
if (priv->tags)
gst_tag_list_unref (priv->tags);
priv->tags = NULL;
priv->tags_merge_mode = GST_TAG_MERGE_APPEND;
if (priv->upstream_tags) {
gst_tag_list_unref (priv->upstream_tags);
priv->upstream_tags = NULL;
}
priv->tags_changed = FALSE;
priv->reordered_output = FALSE;
priv->dropped = 0;
priv->processed = 0;
priv->decode_frame_number = 0;
priv->base_picture_number = 0;
if (priv->pool) {
GST_DEBUG_OBJECT (decoder, "deactivate pool %" GST_PTR_FORMAT,
priv->pool);
gst_buffer_pool_set_active (priv->pool, FALSE);
gst_object_unref (priv->pool);
priv->pool = NULL;
}
if (priv->allocator) {
gst_object_unref (priv->allocator);
priv->allocator = NULL;
}
}
priv->discont = TRUE;
priv->base_timestamp = GST_CLOCK_TIME_NONE;
priv->last_timestamp_out = GST_CLOCK_TIME_NONE;
priv->pts_delta = 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_free_full (priv->timestamps, (GDestroyNotify) timestamp_free);
priv->timestamps = NULL;
priv->bytes_out = 0;
priv->time = 0;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
}
static GstFlowReturn
gst_video_decoder_chain_forward (GstVideoDecoder * decoder,
GstBuffer * buf, gboolean at_eos)
{
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_PTS_IS_VALID (buf) && !priv->packetized) {
gst_video_decoder_add_timestamp (decoder, buf);
}
priv->input_offset += gst_buffer_get_size (buf);
if (priv->packetized) {
if (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (priv->current_frame);
}
priv->current_frame->input_buffer = buf;
if (decoder->input_segment.rate < 0.0) {
priv->parse_gather =
g_list_prepend (priv->parse_gather, priv->current_frame);
} else {
ret = gst_video_decoder_decode_frame (decoder, priv->current_frame);
}
priv->current_frame = NULL;
} else {
gst_adapter_push (priv->input_adapter, buf);
ret = gst_video_decoder_parse_available (decoder, at_eos, TRUE);
}
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;
GST_DEBUG_OBJECT (dec, "flushing buffers to decode");
walk = priv->decode;
while (walk) {
GList *next;
GstVideoCodecFrame *frame = (GstVideoCodecFrame *) (walk->data);
GST_DEBUG_OBJECT (dec, "decoding frame %p buffer %p, PTS %" GST_TIME_FORMAT
", DTS %" GST_TIME_FORMAT, frame, frame->input_buffer,
GST_TIME_ARGS (GST_BUFFER_PTS (frame->input_buffer)),
GST_TIME_ARGS (GST_BUFFER_DTS (frame->input_buffer)));
next = walk->next;
priv->decode = g_list_delete_link (priv->decode, walk);
/* decode buffer, resulting data prepended to queue */
res = gst_video_decoder_decode_frame (dec, frame);
if (res != GST_FLOW_OK)
break;
walk = next;
}
return res;
}
/* gst_video_decoder_flush_parse is called from the
* chain_reverse() function when a buffer containing
* a DISCONT - indicating that reverse playback
* looped back to the next data block, and therefore
* all available data should be fed through the
* decoder and frames gathered for reversed output
*/
static GstFlowReturn
gst_video_decoder_flush_parse (GstVideoDecoder * dec, gboolean at_eos)
{
GstVideoDecoderPrivate *priv = dec->priv;
GstFlowReturn res = GST_FLOW_OK;
GList *walk;
GstVideoDecoderClass *decoder_class;
decoder_class = GST_VIDEO_DECODER_GET_CLASS (dec);
GST_DEBUG_OBJECT (dec, "flushing buffers to parsing");
/* Reverse the gather list, and prepend it to the parse list,
* then flush to parse whatever we can */
priv->gather = g_list_reverse (priv->gather);
priv->parse = g_list_concat (priv->gather, priv->parse);
priv->gather = NULL;
/* clear buffer and decoder state */
gst_video_decoder_flush (dec, FALSE);
walk = priv->parse;
while (walk) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
GList *next = walk->next;
GST_DEBUG_OBJECT (dec, "parsing buffer %p, PTS %" GST_TIME_FORMAT
", DTS %" GST_TIME_FORMAT, buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
/* parse buffer, resulting frames prepended to parse_gather queue */
gst_buffer_ref (buf);
res = gst_video_decoder_chain_forward (dec, buf, at_eos);
/* 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;
}
walk = priv->parse_gather;
while (walk) {
GstVideoCodecFrame *frame = (GstVideoCodecFrame *) (walk->data);
GList *walk2;
/* this is reverse playback, check if we need to apply some segment
* to the output before decoding, as during decoding the segment.rate
* must be used to determine if a buffer should be pushed or added to
* the output list for reverse pushing.
*
* The new segment is not immediately pushed here because we must
* wait for negotiation to happen before it can be pushed to avoid
* pushing a segment before caps event. Negotiation only happens
* when finish_frame is called.
*/
for (walk2 = frame->events; walk2;) {
GList *cur = walk2;
GstEvent *event = walk2->data;
walk2 = g_list_next (walk2);
if (GST_EVENT_TYPE (event) <= GST_EVENT_SEGMENT) {
if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
GstSegment segment;
GST_DEBUG_OBJECT (dec, "Segment at frame %p %" GST_TIME_FORMAT,
frame, GST_TIME_ARGS (GST_BUFFER_PTS (frame->input_buffer)));
gst_event_copy_segment (event, &segment);
if (segment.format == GST_FORMAT_TIME) {
dec->output_segment = segment;
dec->priv->in_out_segment_sync =
gst_segment_is_equal (&dec->input_segment, &segment);
}
}
dec->priv->pending_events =
g_list_append (dec->priv->pending_events, event);
frame->events = g_list_delete_link (frame->events, cur);
}
}
walk = walk->next;
}
/* now we can process frames. Start by moving each frame from the parse_gather
* to the decode list, reverse the order as we go, and stopping when/if we
* copy a keyframe. */
GST_DEBUG_OBJECT (dec, "checking parsed frames for a keyframe to decode");
walk = priv->parse_gather;
while (walk) {
GstVideoCodecFrame *frame = (GstVideoCodecFrame *) (walk->data);
/* remove from the gather list */
priv->parse_gather = g_list_remove_link (priv->parse_gather, walk);
/* move it to the front of the decode queue */
priv->decode = g_list_concat (walk, priv->decode);
/* if we copied a keyframe, flush and decode the decode queue */
if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) {
GST_DEBUG_OBJECT (dec, "found keyframe %p with PTS %" GST_TIME_FORMAT
", DTS %" GST_TIME_FORMAT, frame,
GST_TIME_ARGS (GST_BUFFER_PTS (frame->input_buffer)),
GST_TIME_ARGS (GST_BUFFER_DTS (frame->input_buffer)));
res = gst_video_decoder_flush_decode (dec);
if (res != GST_FLOW_OK)
goto done;
/* We need to tell the subclass to drain now.
* We prefer the drain vfunc, but for backward-compat
* we use a finish() vfunc if drain isn't implemented */
if (decoder_class->drain) {
GST_DEBUG_OBJECT (dec, "Draining");
res = decoder_class->drain (dec);
} else if (decoder_class->finish) {
GST_FIXME_OBJECT (dec, "Sub-class should implement drain(). "
"Calling finish() for backwards-compat");
res = decoder_class->finish (dec);
}
if (res != GST_FLOW_OK)
goto done;
/* now send queued data downstream */
walk = priv->output_queued;
while (walk) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
if (G_LIKELY (res == GST_FLOW_OK)) {
/* avoid stray DISCONT from forward processing,
* which have no meaning in reverse pushing */
GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
/* Last chance to calculate a timestamp as we loop backwards
* through the list */
if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE)
priv->last_timestamp_out = GST_BUFFER_TIMESTAMP (buf);
else if (priv->last_timestamp_out != GST_CLOCK_TIME_NONE &&
GST_BUFFER_DURATION (buf) != GST_CLOCK_TIME_NONE) {
GST_BUFFER_TIMESTAMP (buf) =
priv->last_timestamp_out - GST_BUFFER_DURATION (buf);
priv->last_timestamp_out = GST_BUFFER_TIMESTAMP (buf);
GST_LOG_OBJECT (dec,
"Calculated TS %" GST_TIME_FORMAT " working backwards",
GST_TIME_ARGS (priv->last_timestamp_out));
}
res = gst_video_decoder_clip_and_push_buf (dec, buf);
} else {
gst_buffer_unref (buf);
}
priv->output_queued =
g_list_delete_link (priv->output_queued, priv->output_queued);
walk = priv->output_queued;
}
/* clear buffer and decoder state again
* before moving to the previous keyframe */
gst_video_decoder_flush (dec, FALSE);
}
walk = priv->parse_gather;
}
done:
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");
/* parse and decode stuff in the gather and parse queues */
result = gst_video_decoder_flush_parse (dec, FALSE);
}
if (G_LIKELY (buf)) {
GST_DEBUG_OBJECT (dec, "gathering buffer %p of size %" G_GSIZE_FORMAT ", "
"PTS %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT ", dur %"
GST_TIME_FORMAT, buf, gst_buffer_get_size (buf),
GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
GST_TIME_ARGS (GST_BUFFER_DTS (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;
GstFlowReturn ret = GST_FLOW_OK;
decoder = GST_VIDEO_DECODER (parent);
if (G_UNLIKELY (!decoder->priv->input_state && decoder->priv->needs_format))
goto not_negotiated;
GST_LOG_OBJECT (decoder,
"chain PTS %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT " duration %"
GST_TIME_FORMAT " size %" G_GSIZE_FORMAT,
GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
GST_TIME_ARGS (GST_BUFFER_DTS (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);
}
decoder->priv->had_input_data = TRUE;
if (decoder->input_segment.rate > 0.0)
ret = gst_video_decoder_chain_forward (decoder, buf, FALSE);
else
ret = gst_video_decoder_chain_reverse (decoder, buf);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (decoder, CORE, NEGOTIATION, (NULL),
("decoder not initialized"));
gst_buffer_unref (buf);
return GST_FLOW_NOT_NEGOTIATED;
}
}
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:
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_video_decoder_reset (decoder, TRUE, TRUE);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
/* 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:{
gboolean stopped = TRUE;
if (decoder_class->stop)
stopped = decoder_class->stop (decoder);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_video_decoder_reset (decoder, TRUE, TRUE);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
if (!stopped)
goto stop_failed;
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_push_event_list (GstVideoDecoder * decoder, GList * events)
{
GList *l;
/* events are stored in reverse order */
for (l = g_list_last (events); l; l = g_list_previous (l)) {
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);
}
static void
gst_video_decoder_prepare_finish_frame (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame, gboolean dropping)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GList *l, *events = NULL;
gboolean sync;
#ifndef GST_DISABLE_GST_DEBUG
GST_LOG_OBJECT (decoder, "n %d in %" G_GSIZE_FORMAT " out %" G_GSIZE_FORMAT,
g_list_length (priv->frames),
gst_adapter_available (priv->input_adapter),
gst_adapter_available (priv->output_adapter));
#endif
sync = GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame);
GST_LOG_OBJECT (decoder,
"finish frame %p (#%d) sync:%d PTS:%" GST_TIME_FORMAT " DTS:%"
GST_TIME_FORMAT,
frame, frame->system_frame_number,
sync, GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (frame->dts));
/* 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;
}
if (dropping || !decoder->priv->output_state) {
/* Push before the next frame that is not dropped */
decoder->priv->pending_events =
g_list_concat (decoder->priv->pending_events, events);
} else {
gst_video_decoder_push_event_list (decoder, decoder->priv->pending_events);
decoder->priv->pending_events = NULL;
gst_video_decoder_push_event_list (decoder, 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 output but we don't have an output_buffer
* we have a problem :) */
if (G_UNLIKELY ((frame->output_buffer == NULL) && !dropping))
goto no_output_buffer;
if (GST_CLOCK_TIME_IS_VALID (frame->pts)) {
if (frame->pts != priv->base_timestamp) {
GST_DEBUG_OBJECT (decoder,
"sync timestamp %" GST_TIME_FORMAT " diff %" GST_STIME_FORMAT,
GST_TIME_ARGS (frame->pts),
GST_STIME_ARGS (GST_CLOCK_DIFF (frame->pts,
decoder->output_segment.start)));
priv->base_timestamp = frame->pts;
priv->base_picture_number = frame->decode_frame_number;
}
}
if (frame->duration == GST_CLOCK_TIME_NONE) {
frame->duration = gst_video_decoder_get_frame_duration (decoder, frame);
GST_LOG_OBJECT (decoder,
"Guessing duration %" GST_TIME_FORMAT " for frame...",
GST_TIME_ARGS (frame->duration));
}
/* PTS is expected montone ascending,
* so a good guess is lowest unsent DTS */
{
GstClockTime min_ts = GST_CLOCK_TIME_NONE;
GstVideoCodecFrame *oframe = NULL;
gboolean seen_none = FALSE;
/* some maintenance regardless */
for (l = priv->frames; l; l = l->next) {
GstVideoCodecFrame *tmp = l->data;
if (!GST_CLOCK_TIME_IS_VALID (tmp->abidata.ABI.ts)) {
seen_none = TRUE;
continue;
}
if (!GST_CLOCK_TIME_IS_VALID (min_ts) || tmp->abidata.ABI.ts < min_ts) {
min_ts = tmp->abidata.ABI.ts;
oframe = tmp;
}
}
/* save a ts if needed */
if (oframe && oframe != frame) {
oframe->abidata.ABI.ts = frame->abidata.ABI.ts;
}
/* and set if needed;
* valid delta means we have reasonable DTS input */
/* also, if we ended up reordered, means this approach is conflicting
* with some sparse existing PTS, and so it does not work out */
if (!priv->reordered_output &&
!GST_CLOCK_TIME_IS_VALID (frame->pts) && !seen_none &&
GST_CLOCK_TIME_IS_VALID (priv->pts_delta)) {
frame->pts = min_ts + priv->pts_delta;
GST_DEBUG_OBJECT (decoder,
"no valid PTS, using oldest DTS %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts));
}
/* some more maintenance, ts2 holds PTS */
min_ts = GST_CLOCK_TIME_NONE;
seen_none = FALSE;
for (l = priv->frames; l; l = l->next) {
GstVideoCodecFrame *tmp = l->data;
if (!GST_CLOCK_TIME_IS_VALID (tmp->abidata.ABI.ts2)) {
seen_none = TRUE;
continue;
}
if (!GST_CLOCK_TIME_IS_VALID (min_ts) || tmp->abidata.ABI.ts2 < min_ts) {
min_ts = tmp->abidata.ABI.ts2;
oframe = tmp;
}
}
/* save a ts if needed */
if (oframe && oframe != frame) {
oframe->abidata.ABI.ts2 = frame->abidata.ABI.ts2;
}
/* if we detected reordered output, then PTS are void,
* however those were obtained; bogus input, subclass etc */
if (priv->reordered_output && !seen_none) {
GST_DEBUG_OBJECT (decoder, "invalidating PTS");
frame->pts = GST_CLOCK_TIME_NONE;
}
if (!GST_CLOCK_TIME_IS_VALID (frame->pts) && !seen_none) {
frame->pts = min_ts;
GST_DEBUG_OBJECT (decoder,
"no valid PTS, using oldest PTS %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts));
}
}
if (frame->pts == GST_CLOCK_TIME_NONE) {
/* Last ditch timestamp guess: Just add the duration to the previous
* frame. If it's the first frame, just use the segment start. */
if (frame->duration != GST_CLOCK_TIME_NONE) {
if (GST_CLOCK_TIME_IS_VALID (priv->last_timestamp_out))
frame->pts = priv->last_timestamp_out + frame->duration;
else
frame->pts = decoder->output_segment.start;
GST_LOG_OBJECT (decoder,
"Guessing timestamp %" GST_TIME_FORMAT " for frame...",
GST_TIME_ARGS (frame->pts));
} else if (sync && frame->dts != GST_CLOCK_TIME_NONE) {
frame->pts = frame->dts;
GST_LOG_OBJECT (decoder,
"Setting DTS as PTS %" GST_TIME_FORMAT " for frame...",
GST_TIME_ARGS (frame->pts));
}
}
if (GST_CLOCK_TIME_IS_VALID (priv->last_timestamp_out)) {
if (frame->pts < priv->last_timestamp_out) {
GST_WARNING_OBJECT (decoder,
"decreasing timestamp (%" GST_TIME_FORMAT " < %"
GST_TIME_FORMAT ")",
GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (priv->last_timestamp_out));
priv->reordered_output = TRUE;
/* make it a bit less weird downstream */
frame->pts = priv->last_timestamp_out;
}
}
if (GST_CLOCK_TIME_IS_VALID (frame->pts))
priv->last_timestamp_out = frame->pts;
return;
/* ERRORS */
no_output_buffer:
{
GST_ERROR_OBJECT (decoder, "No buffer to output !");
}
}
/**
* gst_video_decoder_release_frame:
* @dec: a #GstVideoDecoder
* @frame: (transfer full): the #GstVideoCodecFrame to release
*
* Similar to gst_video_decoder_drop_frame(), but simply releases @frame
* without any processing other than removing it from list of pending frames,
* after which it is considered finished and released.
*
* Since: 1.2.2
*/
void
gst_video_decoder_release_frame (GstVideoDecoder * dec,
GstVideoCodecFrame * frame)
{
GList *link;
/* unref once from the list */
GST_VIDEO_DECODER_STREAM_LOCK (dec);
link = g_list_find (dec->priv->frames, frame);
if (link) {
gst_video_codec_frame_unref (frame);
dec->priv->frames = g_list_delete_link (dec->priv->frames, link);
}
if (frame->events) {
dec->priv->pending_events =
g_list_concat (dec->priv->pending_events, frame->events);
frame->events = NULL;
}
GST_VIDEO_DECODER_STREAM_UNLOCK (dec);
/* 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.
*/
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, TRUE);
GST_DEBUG_OBJECT (dec, "dropping frame %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts));
dec->priv->dropped++;
/* post QoS message */
GST_OBJECT_LOCK (dec);
proportion = dec->priv->proportion;
earliest_time = dec->priv->earliest_time;
GST_OBJECT_UNLOCK (dec);
timestamp = frame->pts;
segment = &dec->output_segment;
if (G_UNLIKELY (segment->format == GST_FORMAT_UNDEFINED))
segment = &dec->input_segment;
stream_time =
gst_segment_to_stream_time (segment, GST_FORMAT_TIME, timestamp);
qostime = gst_segment_to_running_time (segment, GST_FORMAT_TIME, timestamp);
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_release_frame (dec, frame);
GST_VIDEO_DECODER_STREAM_UNLOCK (dec);
return GST_FLOW_OK;
}
static gboolean
gst_video_decoder_transform_meta_default (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame, GstMeta * meta)
{
const GstMetaInfo *info = meta->info;
const gchar *const *tags;
tags = gst_meta_api_type_get_tags (info->api);
if (!tags || (g_strv_length ((gchar **) tags) == 1
&& gst_meta_api_type_has_tag (info->api,
g_quark_from_string (GST_META_TAG_VIDEO_STR))))
return TRUE;
return FALSE;
}
typedef struct
{
GstVideoDecoder *decoder;
GstVideoCodecFrame *frame;
} CopyMetaData;
static gboolean
foreach_metadata (GstBuffer * inbuf, GstMeta ** meta, gpointer user_data)
{
CopyMetaData *data = user_data;
GstVideoDecoder *decoder = data->decoder;
GstVideoDecoderClass *klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
GstVideoCodecFrame *frame = data->frame;
const GstMetaInfo *info = (*meta)->info;
gboolean do_copy = FALSE;
if (gst_meta_api_type_has_tag (info->api, _gst_meta_tag_memory)) {
/* never call the transform_meta with memory specific metadata */
GST_DEBUG_OBJECT (decoder, "not copying memory specific metadata %s",
g_type_name (info->api));
do_copy = FALSE;
} else if (klass->transform_meta) {
do_copy = klass->transform_meta (decoder, frame, *meta);
GST_DEBUG_OBJECT (decoder, "transformed metadata %s: copy: %d",
g_type_name (info->api), do_copy);
}
/* we only copy metadata when the subclass implemented a transform_meta
* function and when it returns %TRUE */
if (do_copy) {
GstMetaTransformCopy copy_data = { FALSE, 0, -1 };
GST_DEBUG_OBJECT (decoder, "copy metadata %s", g_type_name (info->api));
/* simply copy then */
info->transform_func (frame->output_buffer, *meta, inbuf,
_gst_meta_transform_copy, &copy_data);
}
return TRUE;
}
/**
* 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.
*
* After calling this function the output buffer of the frame is to be
* considered read-only. This function will also change the metadata
* of the buffer.
*
* Returns: a #GstFlowReturn resulting from sending data downstream
*/
GstFlowReturn
gst_video_decoder_finish_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstFlowReturn ret = GST_FLOW_OK;
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_GET_CLASS (decoder);
GstVideoDecoderPrivate *priv = decoder->priv;
GstBuffer *output_buffer;
gboolean needs_reconfigure = FALSE;
GST_LOG_OBJECT (decoder, "finish frame %p", frame);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
needs_reconfigure = gst_pad_check_reconfigure (decoder->srcpad);
if (G_UNLIKELY (priv->output_state_changed || (priv->output_state
&& needs_reconfigure))) {
if (!gst_video_decoder_negotiate_unlocked (decoder)) {
gst_pad_mark_reconfigure (decoder->srcpad);
if (GST_PAD_IS_FLUSHING (decoder->srcpad))
ret = GST_FLOW_FLUSHING;
else
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
gst_video_decoder_prepare_finish_frame (decoder, frame, FALSE);
priv->processed++;
if (priv->tags_changed) {
GstEvent *tags_event;
tags_event = gst_video_decoder_create_merged_tags_event (decoder);
if (tags_event != NULL)
gst_video_decoder_push_event (decoder, tags_event);
priv->tags_changed = FALSE;
}
/* 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 = frame->output_buffer;
GST_BUFFER_FLAG_UNSET (output_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
GST_BUFFER_PTS (output_buffer) = frame->pts;
GST_BUFFER_DTS (output_buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (output_buffer) = frame->duration;
GST_BUFFER_OFFSET (output_buffer) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (output_buffer) = GST_BUFFER_OFFSET_NONE;
if (priv->discont) {
GST_BUFFER_FLAG_SET (output_buffer, GST_BUFFER_FLAG_DISCONT);
priv->discont = FALSE;
}
if (decoder_class->transform_meta) {
if (G_LIKELY (frame->input_buffer)) {
CopyMetaData data;
data.decoder = decoder;
data.frame = frame;
gst_buffer_foreach_meta (frame->input_buffer, foreach_metadata, &data);
} else {
GST_WARNING_OBJECT (decoder,
"Can't copy metadata because input frame disappeared");
}
}
/* Get an additional ref to the buffer, which is going to be pushed
* downstream, the original ref is owned by the frame
*
* FIXME: clip_and_push_buf() changes buffer metadata but the buffer
* might have a refcount > 1 */
output_buffer = gst_buffer_ref (output_buffer);
/* Release frame so the buffer is writable when we push it downstream
* if possible, i.e. if the subclass does not hold additional references
* to the frame
*/
gst_video_decoder_release_frame (decoder, frame);
frame = NULL;
if (decoder->output_segment.rate < 0.0) {
GST_LOG_OBJECT (decoder, "queued frame");
priv->output_queued = g_list_prepend (priv->output_queued, output_buffer);
} else {
ret = gst_video_decoder_clip_and_push_buf (decoder, output_buffer);
}
done:
if (frame)
gst_video_decoder_release_frame (decoder, frame);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
}
/* With stream lock, takes the frame reference */
static GstFlowReturn
gst_video_decoder_clip_and_push_buf (GstVideoDecoder * decoder, GstBuffer * buf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstVideoDecoderPrivate *priv = decoder->priv;
guint64 start, stop;
guint64 cstart, cstop;
GstSegment *segment;
GstClockTime duration;
/* Check for clipping */
start = GST_BUFFER_PTS (buf);
duration = GST_BUFFER_DURATION (buf);
/* store that we have valid decoded data */
priv->had_output_data = TRUE;
stop = GST_CLOCK_TIME_NONE;
if (GST_CLOCK_TIME_IS_VALID (start) && GST_CLOCK_TIME_IS_VALID (duration)) {
stop = start + duration;
} else if (GST_CLOCK_TIME_IS_VALID (start)
&& !GST_CLOCK_TIME_IS_VALID (duration)) {
/* If we don't clip away buffers that far before the segment we
* can cause the pipeline to lockup. This can happen if audio is
* properly clipped, and thus the audio sink does not preroll yet
* but the video sink prerolls because we already outputted a
* buffer here... and then queues run full.
*
* In the worst case we will clip one buffer too many here now if no
* framerate is given, no buffer duration is given and the actual
* framerate is lower than 25fps */
stop = start + 40 * GST_MSECOND;
}
segment = &decoder->output_segment;
if (gst_segment_clip (segment, GST_FORMAT_TIME, start, stop, &cstart, &cstop)) {
GST_BUFFER_PTS (buf) = cstart;
if (stop != GST_CLOCK_TIME_NONE && GST_CLOCK_TIME_IS_VALID (duration))
GST_BUFFER_DURATION (buf) = cstop - cstart;
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 (cstart),
GST_TIME_ARGS (cstop),
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 (start), GST_TIME_ARGS (stop),
GST_TIME_ARGS (segment->start),
GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time));
/* only check and return EOS if upstream still
* in the same segment and interested as such */
if (decoder->priv->in_out_segment_sync) {
if (segment->rate >= 0) {
if (GST_BUFFER_PTS (buf) >= segment->stop)
ret = GST_FLOW_EOS;
} else if (GST_BUFFER_PTS (buf) < segment->start) {
ret = GST_FLOW_EOS;
}
}
gst_buffer_unref (buf);
goto done;
}
/* update rate estimate */
priv->bytes_out += gst_buffer_get_size (buf);
if (GST_CLOCK_TIME_IS_VALID (duration)) {
priv->time += 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_DEBUG_OBJECT (decoder, "pushing buffer %p of size %" G_GSIZE_FORMAT ", "
"PTS %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT, buf,
gst_buffer_get_size (buf),
GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
/* we got data, so note things are looking up again, reduce
* the error count, if there is one */
if (G_UNLIKELY (priv->error_count))
priv->error_count = 0;
ret = gst_pad_push (decoder->srcpad, buf);
done:
return ret;
}
/**
* gst_video_decoder_add_to_frame:
* @decoder: a #GstVideoDecoder
* @n_bytes: the number of bytes to add
*
* Removes next @n_bytes of input data and adds it to currently parsed frame.
*/
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);
}
/**
* gst_video_decoder_get_pending_frame_size:
* @decoder: a #GstVideoDecoder
*
* Returns the number of bytes previously added to the current frame
* by calling gst_video_decoder_add_to_frame().
*
* Returns: The number of bytes pending for the current frame
*
* Since: 1.4
*/
gsize
gst_video_decoder_get_pending_frame_size (GstVideoDecoder * decoder)
{
GstVideoDecoderPrivate *priv = decoder->priv;
gsize ret;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
ret = gst_adapter_available (priv->output_adapter);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
GST_LOG_OBJECT (decoder, "Current pending frame has %" G_GSIZE_FORMAT "bytes",
ret);
return ret;
}
static guint64
gst_video_decoder_get_frame_duration (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstVideoCodecState *state = decoder->priv->output_state;
/* it's possible that we don't have a state yet when we are dropping the
* initial buffers */
if (state == NULL)
return GST_CLOCK_TIME_NONE;
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
*/
GstFlowReturn
gst_video_decoder_have_frame (GstVideoDecoder * decoder)
{
GstVideoDecoderPrivate *priv = decoder->priv;
GstBuffer *buffer;
int n_available;
GstClockTime pts, dts, duration;
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (decoder, "have_frame");
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
n_available = gst_adapter_available (priv->output_adapter);
if (n_available) {
buffer = gst_adapter_take_buffer (priv->output_adapter, n_available);
} else {
buffer = gst_buffer_new_and_alloc (0);
}
priv->current_frame->input_buffer = buffer;
gst_video_decoder_get_timestamp_at_offset (decoder,
priv->frame_offset, &pts, &dts, &duration);
GST_BUFFER_PTS (buffer) = pts;
GST_BUFFER_DTS (buffer) = dts;
GST_BUFFER_DURATION (buffer) = duration;
GST_LOG_OBJECT (decoder, "collected frame size %d, "
"PTS %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT ", dur %"
GST_TIME_FORMAT, n_available, GST_TIME_ARGS (pts), GST_TIME_ARGS (dts),
GST_TIME_ARGS (duration));
/* In reverse playback, just capture and queue frames for later processing */
if (decoder->output_segment.rate < 0.0) {
priv->parse_gather =
g_list_prepend (priv->parse_gather, priv->current_frame);
} else {
/* Otherwise, decode the frame, which gives away our ref */
ret = gst_video_decoder_decode_frame (decoder, priv->current_frame);
}
/* Current frame is gone now, either way */
priv->current_frame = NULL;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
}
/* Pass the frame in priv->current_frame through the
* handle_frame() callback for decoding and passing to gvd_finish_frame(),
* or dropping by passing to gvd_drop_frame() */
static GstFlowReturn
gst_video_decoder_decode_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstVideoDecoderPrivate *priv = decoder->priv;
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);
frame->distance_from_sync = priv->distance_from_sync;
priv->distance_from_sync++;
frame->pts = GST_BUFFER_PTS (frame->input_buffer);
frame->dts = GST_BUFFER_DTS (frame->input_buffer);
frame->duration = GST_BUFFER_DURATION (frame->input_buffer);
/* For keyframes, PTS = DTS + constant_offset, usually 0 to 3 frame
* durations. */
/* FIXME upstream can be quite wrong about the keyframe aspect,
* so we could be going off here as well,
* maybe let subclass decide if it really is/was a keyframe */
if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame) &&
GST_CLOCK_TIME_IS_VALID (frame->pts)
&& GST_CLOCK_TIME_IS_VALID (frame->dts)) {
/* just in case they are not equal as might ideally be,
* e.g. quicktime has a (positive) delta approach */
priv->pts_delta = frame->pts - frame->dts;
GST_DEBUG_OBJECT (decoder, "PTS delta %d ms",
(gint) (priv->pts_delta / GST_MSECOND));
}
frame->abidata.ABI.ts = frame->dts;
frame->abidata.ABI.ts2 = frame->pts;
GST_LOG_OBJECT (decoder, "PTS %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT,
GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (frame->dts));
GST_LOG_OBJECT (decoder, "dist %d", frame->distance_from_sync);
gst_video_codec_frame_ref (frame);
priv->frames = g_list_append (priv->frames, frame);
if (g_list_length (priv->frames) > 10) {
GST_DEBUG_OBJECT (decoder, "decoder frame list getting long: %d frames,"
"possible internal leaking?", g_list_length (priv->frames));
}
frame->deadline =
gst_segment_to_running_time (&decoder->input_segment, GST_FORMAT_TIME,
frame->pts);
/* do something with 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));
/* the frame has either been added to parse_gather or sent to
handle frame so there is no need to unref it */
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.
*/
GstVideoCodecState *
gst_video_decoder_get_output_state (GstVideoDecoder * decoder)
{
GstVideoCodecState *state = NULL;
GST_OBJECT_LOCK (decoder);
if (decoder->priv->output_state)
state = gst_video_codec_state_ref (decoder->priv->output_state);
GST_OBJECT_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.
*/
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);
GST_OBJECT_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);
if (priv->output_state != NULL && priv->output_state->info.fps_n > 0) {
priv->qos_frame_duration =
gst_util_uint64_scale (GST_SECOND, priv->output_state->info.fps_d,
priv->output_state->info.fps_n);
} else {
priv->qos_frame_duration = 0;
}
priv->output_state_changed = TRUE;
GST_OBJECT_UNLOCK (decoder);
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.
*/
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 full): pending unfinished #GstVideoCodecFrame identified by @frame_number.
*/
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 = gst_video_codec_frame_ref (tmp);
break;
}
}
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return frame;
}
/**
* gst_video_decoder_get_frames:
* @decoder: a #GstVideoDecoder
*
* Get all pending unfinished #GstVideoCodecFrame
*
* Returns: (transfer full) (element-type GstVideoCodecFrame): pending unfinished #GstVideoCodecFrame.
*/
GList *
gst_video_decoder_get_frames (GstVideoDecoder * decoder)
{
GList *frames;
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
frames = g_list_copy (decoder->priv->frames);
g_list_foreach (frames, (GFunc) gst_video_codec_frame_ref, NULL);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return frames;
}
static gboolean
gst_video_decoder_decide_allocation_default (GstVideoDecoder * decoder,
GstQuery * query)
{
GstCaps *outcaps = NULL;
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);
if (outcaps)
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_DEBUG_OBJECT (decoder,
"setting config %" GST_PTR_FORMAT " in pool %" GST_PTR_FORMAT, config,
pool);
if (!gst_buffer_pool_set_config (pool, config)) {
config = gst_buffer_pool_get_config (pool);
/* If change are not acceptable, fallback to generic pool */
if (!gst_buffer_pool_config_validate_params (config, outcaps, size, min,
max)) {
GST_DEBUG_OBJECT (decoder, "unsuported pool, making new pool");
gst_object_unref (pool);
pool = gst_video_buffer_pool_new ();
gst_buffer_pool_config_set_params (config, outcaps, size, min, max);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
}
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
}
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_object_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;
config_failed:
if (allocator)
gst_object_unref (allocator);
if (pool)
gst_object_unref (pool);
GST_ELEMENT_ERROR (decoder, RESOURCE, SETTINGS,
("Failed to configure the buffer pool"),
("Configuration is most likely invalid, please report this issue."));
return FALSE;
}
static gboolean
gst_video_decoder_propose_allocation_default (GstVideoDecoder * decoder,
GstQuery * query)
{
return TRUE;
}
static gboolean
gst_video_decoder_negotiate_pool (GstVideoDecoder * decoder, GstCaps * caps)
{
GstVideoDecoderClass *klass;
GstQuery *query = NULL;
GstBufferPool *pool = NULL;
GstAllocator *allocator;
GstAllocationParams params;
gboolean ret = TRUE;
klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
query = gst_query_new_allocation (caps, TRUE);
GST_DEBUG_OBJECT (decoder, "do query ALLOCATION");
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_object_unref (allocator);
ret = FALSE;
goto no_decide_allocation;
}
if (decoder->priv->allocator)
gst_object_unref (decoder->priv->allocator);
decoder->priv->allocator = allocator;
decoder->priv->params = params;
if (decoder->priv->pool) {
/* do not set the bufferpool to inactive here, it will be done
* on its finalize function. As videodecoder do late renegotiation
* it might happen that some element downstream is already using this
* same bufferpool and deactivating it will make it fail.
* Happens when a downstream element changes from passthrough to
* non-passthrough and gets this same bufferpool to use */
GST_DEBUG_OBJECT (decoder, "unref pool %" GST_PTR_FORMAT,
decoder->priv->pool);
gst_object_unref (decoder->priv->pool);
}
decoder->priv->pool = pool;
/* and activate */
GST_DEBUG_OBJECT (decoder, "activate pool %" GST_PTR_FORMAT, pool);
gst_buffer_pool_set_active (pool, TRUE);
done:
if (query)
gst_query_unref (query);
return ret;
/* Errors */
no_decide_allocation:
{
GST_WARNING_OBJECT (decoder, "Subclass failed to decide allocation");
goto done;
}
}
static gboolean
gst_video_decoder_negotiate_default (GstVideoDecoder * decoder)
{
GstVideoCodecState *state = decoder->priv->output_state;
gboolean ret = TRUE;
GstVideoCodecFrame *frame;
GstCaps *prevcaps;
if (!state) {
GST_DEBUG_OBJECT (decoder,
"Trying to negotiate the pool with out setting the o/p format");
ret = gst_video_decoder_negotiate_pool (decoder, NULL);
goto done;
}
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_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 (state->caps == NULL)
state->caps = gst_video_info_to_caps (&state->info);
GST_DEBUG_OBJECT (decoder, "setting caps %" GST_PTR_FORMAT, state->caps);
/* Push all pending pre-caps events of the oldest frame before
* setting caps */
frame = decoder->priv->frames ? decoder->priv->frames->data : NULL;
if (frame || decoder->priv->current_frame_events) {
GList **events, *l;
if (frame) {
events = &frame->events;
} else {
events = &decoder->priv->current_frame_events;
}
for (l = g_list_last (*events); l;) {
GstEvent *event = GST_EVENT (l->data);
GList *tmp;
if (GST_EVENT_TYPE (event) < GST_EVENT_CAPS) {
gst_video_decoder_push_event (decoder, event);
tmp = l;
l = l->prev;
*events = g_list_delete_link (*events, tmp);
} else {
l = l->prev;
}
}
}
prevcaps = gst_pad_get_current_caps (decoder->srcpad);
if (!prevcaps || !gst_caps_is_equal (prevcaps, state->caps)) {
if (!prevcaps) {
GST_DEBUG_OBJECT (decoder, "decoder src pad has currently NULL caps");
}
ret = gst_pad_set_caps (decoder->srcpad, state->caps);
} else {
ret = TRUE;
GST_DEBUG_OBJECT (decoder,
"current src pad and output state caps are the same");
}
if (prevcaps)
gst_caps_unref (prevcaps);
if (!ret)
goto done;
decoder->priv->output_state_changed = FALSE;
/* Negotiate pool */
ret = gst_video_decoder_negotiate_pool (decoder, state->caps);
done:
return ret;
}
static gboolean
gst_video_decoder_negotiate_unlocked (GstVideoDecoder * decoder)
{
GstVideoDecoderClass *klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
gboolean ret = TRUE;
if (G_LIKELY (klass->negotiate))
ret = klass->negotiate (decoder);
return ret;
}
/**
* gst_video_decoder_negotiate:
* @decoder: a #GstVideoDecoder
*
* Negotiate with downstream elements to currently configured #GstVideoCodecState.
* Unmark GST_PAD_FLAG_NEED_RECONFIGURE in any case. But mark it again if
* negotiate fails.
*
* Returns: #TRUE if the negotiation succeeded, else #FALSE.
*/
gboolean
gst_video_decoder_negotiate (GstVideoDecoder * decoder)
{
GstVideoDecoderClass *klass;
gboolean ret = TRUE;
g_return_val_if_fail (GST_IS_VIDEO_DECODER (decoder), FALSE);
klass = GST_VIDEO_DECODER_GET_CLASS (decoder);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
gst_pad_check_reconfigure (decoder->srcpad);
if (klass->negotiate) {
ret = klass->negotiate (decoder);
if (!ret)
gst_pad_mark_reconfigure (decoder->srcpad);
}
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return ret;
}
/**
* gst_video_decoder_allocate_output_buffer:
* @decoder: a #GstVideoDecoder
*
* Helper function that allocates a buffer to hold a video frame for @decoder's
* current #GstVideoCodecState.
*
* You should use gst_video_decoder_allocate_output_frame() instead of this
* function, if possible at all.
*
* Returns: (transfer full): allocated buffer, or NULL if no buffer could be
* allocated (e.g. when downstream is flushing or shutting down)
*/
GstBuffer *
gst_video_decoder_allocate_output_buffer (GstVideoDecoder * decoder)
{
GstFlowReturn flow;
GstBuffer *buffer = NULL;
gboolean needs_reconfigure = FALSE;
GST_DEBUG ("alloc src buffer");
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
needs_reconfigure = gst_pad_check_reconfigure (decoder->srcpad);
if (G_UNLIKELY (!decoder->priv->output_state
|| decoder->priv->output_state_changed || needs_reconfigure)) {
if (!gst_video_decoder_negotiate_unlocked (decoder)) {
if (decoder->priv->output_state) {
GST_DEBUG_OBJECT (decoder, "Failed to negotiate, fallback allocation");
gst_pad_mark_reconfigure (decoder->srcpad);
goto fallback;
} else {
GST_DEBUG_OBJECT (decoder, "Failed to negotiate, output_buffer=NULL");
goto failed_allocation;
}
}
}
flow = gst_buffer_pool_acquire_buffer (decoder->priv->pool, &buffer, NULL);
if (flow != GST_FLOW_OK) {
GST_INFO_OBJECT (decoder, "couldn't allocate output buffer, flow %s",
gst_flow_get_name (flow));
if (decoder->priv->output_state && decoder->priv->output_state->info.size)
goto fallback;
else
goto failed_allocation;
}
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return buffer;
fallback:
GST_INFO_OBJECT (decoder,
"Fallback allocation, creating new buffer which doesn't belongs to any buffer pool");
buffer =
gst_buffer_new_allocate (NULL, decoder->priv->output_state->info.size,
NULL);
failed_allocation:
GST_ERROR_OBJECT (decoder, "Failed to allocate the buffer..");
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return buffer;
}
/**
* gst_video_decoder_allocate_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.
*
* The buffer allocated here is owned by the frame and you should only
* keep references to the frame, not the buffer.
*
* Returns: %GST_FLOW_OK if an output buffer could be allocated
*/
GstFlowReturn
gst_video_decoder_allocate_output_frame (GstVideoDecoder *
decoder, GstVideoCodecFrame * frame)
{
GstFlowReturn flow_ret;
GstVideoCodecState *state;
int num_bytes;
gboolean needs_reconfigure = FALSE;
g_return_val_if_fail (decoder->priv->output_state, GST_FLOW_NOT_NEGOTIATED);
g_return_val_if_fail (frame->output_buffer == NULL, GST_FLOW_ERROR);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
state = decoder->priv->output_state;
if (state == NULL) {
g_warning ("Output state should be set before allocating frame");
goto error;
}
num_bytes = GST_VIDEO_INFO_SIZE (&state->info);
if (num_bytes == 0) {
g_warning ("Frame size should not be 0");
goto error;
}
needs_reconfigure = gst_pad_check_reconfigure (decoder->srcpad);
if (G_UNLIKELY (decoder->priv->output_state_changed || needs_reconfigure)) {
if (!gst_video_decoder_negotiate_unlocked (decoder)) {
GST_DEBUG_OBJECT (decoder, "Failed to negotiate, fallback allocation");
gst_pad_mark_reconfigure (decoder->srcpad);
}
}
GST_LOG_OBJECT (decoder, "alloc buffer size %d", num_bytes);
flow_ret = gst_buffer_pool_acquire_buffer (decoder->priv->pool,
&frame->output_buffer, NULL);
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return flow_ret;
error:
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
return GST_FLOW_ERROR;
}
/**
* 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.
*/
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)
&& GST_CLOCK_TIME_IS_VALID (frame->deadline))
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_STIME_FORMAT,
GST_TIME_ARGS (earliest_time), GST_TIME_ARGS (frame->deadline),
GST_STIME_ARGS (deadline));
GST_OBJECT_UNLOCK (decoder);
return deadline;
}
/**
* gst_video_decoder_get_qos_proportion:
* @decoder: a #GstVideoDecoder
* current QoS proportion, or %NULL
*
* Returns: The current QoS proportion.
*
* Since: 1.0.3
*/
gdouble
gst_video_decoder_get_qos_proportion (GstVideoDecoder * decoder)
{
gdouble proportion;
g_return_val_if_fail (GST_IS_VIDEO_DECODER (decoder), 1.0);
GST_OBJECT_LOCK (decoder);
proportion = decoder->priv->proportion;
GST_OBJECT_UNLOCK (decoder);
return proportion;
}
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 >= 0 &&
dec->priv->error_count > dec->priv->max_errors) {
gst_element_message_full (GST_ELEMENT (dec), GST_MESSAGE_ERROR,
domain, code, txt, dbg, file, function, line);
return GST_FLOW_ERROR;
} else {
g_free (txt);
g_free (dbg);
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. You can set
* -1 for never returning fatal errors. Default is set to
* GST_VIDEO_DECODER_MAX_ERRORS.
*
* The '-1' option was added in 1.4
*/
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.
*/
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_needs_format:
* @dec: a #GstVideoDecoder
* @enabled: new state
*
* Configures decoder format needs. If enabled, subclass needs to be
* negotiated with format caps before it can process any data. It will then
* never be handed any data before it has been configured.
* Otherwise, it might be handed data without having been configured and
* is then expected being able to do so either by default
* or based on the input data.
*
* Since: 1.4
*/
void
gst_video_decoder_set_needs_format (GstVideoDecoder * dec, gboolean enabled)
{
g_return_if_fail (GST_IS_VIDEO_DECODER (dec));
dec->priv->needs_format = enabled;
}
/**
* gst_video_decoder_get_needs_format:
* @dec: a #GstVideoDecoder
*
* Queries decoder required format handling.
*
* Returns: %TRUE if required format handling is enabled.
*
* Since: 1.4
*/
gboolean
gst_video_decoder_get_needs_format (GstVideoDecoder * dec)
{
gboolean result;
g_return_val_if_fail (GST_IS_VIDEO_DECODER (dec), FALSE);
result = dec->priv->needs_format;
return result;
}
/**
* 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.
*/
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.
*/
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.
*/
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
*/
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.
*/
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.
*/
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);
}
/**
* gst_video_decoder_merge_tags:
* @decoder: a #GstVideoDecoder
* @tags: (allow-none): a #GstTagList to merge, or NULL to unset
* previously-set tags
* @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
*
* Sets the audio decoder tags and how they should be merged with any
* upstream stream tags. This will override any tags previously-set
* with gst_audio_decoder_merge_tags().
*
* Note that this is provided for convenience, and the subclass is
* not required to use this and can still do tag handling on its own.
*
* MT safe.
*/
void
gst_video_decoder_merge_tags (GstVideoDecoder * decoder,
const GstTagList * tags, GstTagMergeMode mode)
{
g_return_if_fail (GST_IS_VIDEO_DECODER (decoder));
g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
if (decoder->priv->tags != tags) {
if (decoder->priv->tags) {
gst_tag_list_unref (decoder->priv->tags);
decoder->priv->tags = NULL;
decoder->priv->tags_merge_mode = GST_TAG_MERGE_APPEND;
}
if (tags) {
decoder->priv->tags = gst_tag_list_ref ((GstTagList *) tags);
decoder->priv->tags_merge_mode = mode;
}
GST_DEBUG_OBJECT (decoder, "set decoder tags to %" GST_PTR_FORMAT, tags);
decoder->priv->tags_changed = TRUE;
}
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
}
/**
* gst_video_decoder_get_buffer_pool:
* @decoder: a #GstVideoDecoder
*
* Returns: (transfer full): the instance of the #GstBufferPool used
* by the decoder; free it after use it
*/
GstBufferPool *
gst_video_decoder_get_buffer_pool (GstVideoDecoder * decoder)
{
g_return_val_if_fail (GST_IS_VIDEO_DECODER (decoder), NULL);
if (decoder->priv->pool)
return gst_object_ref (decoder->priv->pool);
return NULL;
}
/**
* gst_video_decoder_get_allocator:
* @decoder: a #GstVideoDecoder
* @allocator: (out) (allow-none) (transfer full): the #GstAllocator
* used
* @params: (out) (allow-none) (transfer full): the
* #GstAllocatorParams of @allocator
*
* Lets #GstVideoDecoder sub-classes to know the memory @allocator
* used by the base class and its @params.
*
* Unref the @allocator after use it.
*/
void
gst_video_decoder_get_allocator (GstVideoDecoder * decoder,
GstAllocator ** allocator, GstAllocationParams * params)
{
g_return_if_fail (GST_IS_VIDEO_DECODER (decoder));
if (allocator)
*allocator = decoder->priv->allocator ?
gst_object_ref (decoder->priv->allocator) : NULL;
if (params)
*params = decoder->priv->params;
}
/**
* gst_video_decoder_set_use_default_pad_acceptcaps:
* @decoder: a #GstVideoDecoder
* @use: if the default pad accept-caps query handling should be used
*
* Lets #GstVideoDecoder sub-classes decide if they want the sink pad
* to use the default pad query handler to reply to accept-caps queries.
*
* By setting this to true it is possible to further customize the default
* handler with %GST_PAD_SET_ACCEPT_INTERSECT and
* %GST_PAD_SET_ACCEPT_TEMPLATE
*
* Since: 1.6
*/
void
gst_video_decoder_set_use_default_pad_acceptcaps (GstVideoDecoder * decoder,
gboolean use)
{
decoder->priv->use_default_pad_acceptcaps = use;
}
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