mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-10-06 10:42:22 +00:00
1199 lines
34 KiB
C
1199 lines
34 KiB
C
/* GStreamer
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* Copyright (C) 2008 David Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstbasevideodecoder.h"
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#include <string.h>
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GST_DEBUG_CATEGORY (basevideodecoder_debug);
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#define GST_CAT_DEFAULT basevideodecoder_debug
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enum
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{
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PROP_0,
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PROP_PACKETIZED,
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PROP_SINK_CLIPPING
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};
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static GstFlowReturn gst_base_video_decoder_drain (GstBaseVideoDecoder * dec,
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gboolean at_eos);
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GST_BOILERPLATE (GstBaseVideoDecoder, gst_base_video_decoder,
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GstElement, GST_TYPE_ELEMENT);
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typedef struct _Timestamp Timestamp;
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struct _Timestamp
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{
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guint64 offset;
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GstClockTime timestamp;
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GstClockTime duration;
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};
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static void
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gst_base_video_decoder_clear_timestamps (GstBaseVideoDecoder *
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base_video_decoder)
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{
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GList *l;
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for (l = base_video_decoder->timestamps; l;
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l = base_video_decoder->timestamps) {
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g_slice_free (Timestamp, l->data);
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base_video_decoder->timestamps = l->next;
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g_list_free1 (l);
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}
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}
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static void
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gst_base_video_decoder_add_timestamp (GstBaseVideoDecoder * base_video_decoder,
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GstBuffer * buffer)
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{
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Timestamp *ts;
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ts = g_slice_new (Timestamp);
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GST_DEBUG ("adding timestamp %" G_GUINT64_FORMAT " %" GST_TIME_FORMAT,
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base_video_decoder->input_offset,
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
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ts->offset = base_video_decoder->input_offset;
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ts->timestamp = GST_BUFFER_TIMESTAMP (buffer);
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ts->duration = GST_BUFFER_DURATION (buffer);
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base_video_decoder->timestamps =
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g_list_append (base_video_decoder->timestamps, ts);
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}
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static void
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gst_base_video_decoder_get_timestamp_at_offset (GstBaseVideoDecoder *
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base_video_decoder, guint64 offset, GstClockTime * timestamp,
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GstClockTime * duration)
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{
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GList *g;
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*timestamp = GST_CLOCK_TIME_NONE;
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*duration = GST_CLOCK_TIME_NONE;
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g = base_video_decoder->timestamps;
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while (g) {
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Timestamp *ts;
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ts = g->data;
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if (ts->offset <= offset) {
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*timestamp = ts->timestamp;
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*duration = ts->duration;
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g_slice_free (Timestamp, ts);
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g = g_list_next (g);
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base_video_decoder->timestamps =
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g_list_remove (base_video_decoder->timestamps, ts);
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} else {
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break;
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}
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}
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GST_DEBUG ("got timestamp %" G_GUINT64_FORMAT " %" GST_TIME_FORMAT,
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offset, GST_TIME_ARGS (*timestamp));
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}
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static guint64
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gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
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base_video_decoder, gint field_offset)
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{
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if (base_video_decoder->state.fps_d == 0) {
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return GST_CLOCK_TIME_NONE;
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}
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if (field_offset < 0) {
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GST_WARNING ("field offset < 0");
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return GST_CLOCK_TIME_NONE;
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}
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return base_video_decoder->timestamp_offset +
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gst_util_uint64_scale (field_offset,
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base_video_decoder->state.fps_d * GST_SECOND,
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base_video_decoder->state.fps_n * 2);
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}
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static guint64
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gst_base_video_decoder_get_field_duration (GstBaseVideoDecoder *
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base_video_decoder, gint n_fields)
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{
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if (base_video_decoder->state.fps_d == 0) {
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return GST_CLOCK_TIME_NONE;
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}
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if (n_fields < 0) {
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GST_WARNING ("n_fields < 0");
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return GST_CLOCK_TIME_NONE;
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}
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return gst_util_uint64_scale (n_fields,
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base_video_decoder->state.fps_d * GST_SECOND,
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base_video_decoder->state.fps_n * 2);
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}
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static GstVideoFrame *
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gst_base_video_decoder_new_frame (GstBaseVideoDecoder * base_video_decoder)
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{
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GstBaseVideoDecoderClass *base_video_decoder_class =
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GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
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GstVideoFrame *frame;
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if (base_video_decoder_class->create_frame)
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frame = base_video_decoder_class->create_frame (base_video_decoder);
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else
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frame = gst_video_frame_new ();
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return frame;
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}
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static void
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gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder)
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{
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GST_DEBUG ("reset");
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base_video_decoder->discont = TRUE;
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base_video_decoder->have_sync = FALSE;
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base_video_decoder->timestamp_offset = GST_CLOCK_TIME_NONE;
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base_video_decoder->last_timestamp = GST_CLOCK_TIME_NONE;
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base_video_decoder->input_offset = 0;
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base_video_decoder->current_buf_offset = -1;
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base_video_decoder->prev_buf_offset = -1;
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gst_adapter_clear (base_video_decoder->input_adapter);
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if (base_video_decoder->current_frame) {
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gst_video_frame_unref (base_video_decoder->current_frame);
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base_video_decoder->current_frame = NULL;
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}
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gst_base_video_decoder_clear_timestamps (base_video_decoder);
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base_video_decoder->have_src_caps = FALSE;
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GST_OBJECT_LOCK (base_video_decoder);
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base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE;
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base_video_decoder->proportion = 0.5;
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GST_OBJECT_UNLOCK (base_video_decoder);
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}
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static void
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gst_base_video_decoder_flush (GstBaseVideoDecoder * base_video_decoder)
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{
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GstBaseVideoDecoderClass *base_video_decoder_class;
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gst_base_video_decoder_reset (base_video_decoder);
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base_video_decoder_class =
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GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
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if (base_video_decoder_class->flush)
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base_video_decoder_class->flush (base_video_decoder);
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}
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static void
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gst_base_video_decoder_reset_state (GstVideoState * state)
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{
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if (state->codec_data)
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gst_buffer_unref (state->codec_data);
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memset (state, 0, sizeof (GstVideoState));
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state->par_n = state->par_d = 1;
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}
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static gboolean
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gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstBaseVideoDecoder *base_video_decoder;
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GstBaseVideoDecoderClass *base_video_decoder_class;
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GstStructure *structure;
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const GValue *codec_data;
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GstVideoState *state;
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gboolean ret = TRUE;
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base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
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base_video_decoder_class =
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GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
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GST_DEBUG ("setcaps %" GST_PTR_FORMAT, caps);
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state = &base_video_decoder->state;
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gst_base_video_decoder_reset_state (state);
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structure = gst_caps_get_structure (caps, 0);
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gst_video_format_parse_caps (caps, NULL, &state->width, &state->height);
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gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d);
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gst_video_parse_caps_pixel_aspect_ratio (caps, &state->par_n, &state->par_d);
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gst_structure_get_boolean (structure, "interlaced", &state->interlaced);
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codec_data = gst_structure_get_value (structure, "codec_data");
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if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER)
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state->codec_data = gst_value_get_buffer (codec_data);
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if (base_video_decoder_class->set_sink_caps)
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ret = base_video_decoder_class->set_sink_caps (base_video_decoder, caps);
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g_object_unref (base_video_decoder);
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return ret;
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}
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static gboolean
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gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event)
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{
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GstBaseVideoDecoder *base_video_decoder;
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gboolean res = FALSE;
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base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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if (!base_video_decoder->packetized)
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gst_base_video_decoder_drain (base_video_decoder, TRUE);
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res =
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gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD
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(base_video_decoder), event);
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break;
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case GST_EVENT_NEWSEGMENT:
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{
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gboolean update;
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double rate;
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double applied_rate;
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GstFormat format;
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gint64 start;
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gint64 stop;
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gint64 position;
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GstSegment *segment = &base_video_decoder->segment;
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gst_event_parse_new_segment_full (event, &update, &rate,
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&applied_rate, &format, &start, &stop, &position);
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if (format != GST_FORMAT_TIME)
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goto newseg_wrong_format;
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if (!update) {
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gst_base_video_decoder_flush (base_video_decoder);
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}
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base_video_decoder->timestamp_offset = start;
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gst_segment_set_newsegment_full (segment,
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update, rate, applied_rate, format, start, stop, position);
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base_video_decoder->have_segment = TRUE;
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GST_WARNING ("new segment: format %d rate %g start %" GST_TIME_FORMAT
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" stop %" GST_TIME_FORMAT
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" position %" GST_TIME_FORMAT
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" update %d",
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format, rate,
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GST_TIME_ARGS (segment->start),
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GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time), update);
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res =
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gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD
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(base_video_decoder), event);
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break;
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}
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case GST_EVENT_FLUSH_STOP:
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gst_base_video_decoder_flush (base_video_decoder);
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gst_segment_init (&base_video_decoder->segment, GST_FORMAT_TIME);
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res =
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gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD
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(base_video_decoder), event);
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break;
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default:
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res = gst_pad_event_default (pad, event);
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break;
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}
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done:
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gst_object_unref (base_video_decoder);
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return res;
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newseg_wrong_format:
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GST_DEBUG_OBJECT (base_video_decoder, "received non TIME newsegment");
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gst_event_unref (event);
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goto done;
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}
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static gboolean
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gst_base_video_decoder_src_event (GstPad * pad, GstEvent * event)
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{
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GstBaseVideoDecoder *base_video_decoder;
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gboolean res = FALSE;
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base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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/* FIXME: do seek using bitrate incase upstream doesn't handle it */
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res =
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gst_pad_push_event (GST_BASE_VIDEO_DECODER_SINK_PAD
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(base_video_decoder), event);
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break;
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case GST_EVENT_QOS:
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{
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gdouble proportion;
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GstClockTimeDiff diff;
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GstClockTime timestamp;
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GstClockTime duration;
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gst_event_parse_qos (event, &proportion, &diff, ×tamp);
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GST_OBJECT_LOCK (base_video_decoder);
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base_video_decoder->proportion = proportion;
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if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (timestamp))) {
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if (G_UNLIKELY (diff > 0)) {
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if (base_video_decoder->state.fps_n > 0)
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duration =
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gst_util_uint64_scale (GST_SECOND,
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base_video_decoder->state.fps_d,
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base_video_decoder->state.fps_n);
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else
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duration = 0;
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base_video_decoder->earliest_time = timestamp + 2 * diff + duration;
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} else {
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base_video_decoder->earliest_time = timestamp + diff;
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}
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} else {
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base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE;
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}
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GST_OBJECT_UNLOCK (base_video_decoder);
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GST_DEBUG_OBJECT (base_video_decoder,
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"got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT ", %g",
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GST_TIME_ARGS (timestamp), diff, proportion);
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res =
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gst_pad_push_event (GST_BASE_VIDEO_DECODER_SINK_PAD
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(base_video_decoder), event);
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break;
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}
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default:
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res =
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gst_pad_push_event (GST_BASE_VIDEO_DECODER_SINK_PAD
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(base_video_decoder), event);
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break;
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}
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gst_object_unref (base_video_decoder);
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return res;
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}
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static const GstQueryType *
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gst_base_video_decoder_get_query_types (GstPad * pad)
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{
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static const GstQueryType query_types[] = {
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GST_QUERY_POSITION,
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GST_QUERY_DURATION,
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0
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};
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return query_types;
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}
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|
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static gboolean
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gst_base_video_decoder_src_query (GstPad * pad, GstQuery * query)
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{
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GstBaseVideoDecoder *dec;
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gboolean res = TRUE;
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dec = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
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|
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switch GST_QUERY_TYPE
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(query) {
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case GST_QUERY_POSITION:
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{
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GstFormat format;
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gint64 time;
|
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gst_query_parse_position (query, &format, NULL);
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GST_DEBUG ("query in format %d", format);
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|
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if (format != GST_FORMAT_TIME) {
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goto error;
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}
|
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|
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time = dec->last_timestamp;
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time = gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, time);
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|
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gst_query_set_position (query, format, time);
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res = TRUE;
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break;
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}
|
|
|
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case GST_QUERY_DURATION:
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/* FIXME: approximate using bitrate if upstream doesn't answear */
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res = gst_pad_query (dec->sinkpad, query);
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break;
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|
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default:
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res = gst_pad_query_default (pad, query);
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}
|
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|
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gst_object_unref (dec);
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return res;
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|
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error:
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GST_ERROR_OBJECT (dec, "query failed");
|
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gst_object_unref (dec);
|
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return res;
|
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}
|
|
|
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static gboolean
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gst_base_video_decoder_sink_query (GstPad * pad, GstQuery * query)
|
|
{
|
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GstBaseVideoDecoder *base_video_decoder;
|
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gboolean res = FALSE;
|
|
|
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base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
|
|
|
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GST_DEBUG_OBJECT (base_video_decoder, "sink query fps=%d/%d",
|
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base_video_decoder->state.fps_n, base_video_decoder->state.fps_d);
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switch (GST_QUERY_TYPE (query)) {
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default:
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res = gst_pad_query_default (pad, query);
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break;
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}
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|
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gst_object_unref (base_video_decoder);
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|
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return res;
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}
|
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|
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gboolean
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gst_base_video_decoder_set_src_caps (GstBaseVideoDecoder * base_video_decoder)
|
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{
|
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GstCaps *caps;
|
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GstVideoState *state = &base_video_decoder->state;
|
|
|
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if (base_video_decoder->have_src_caps)
|
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return TRUE;
|
|
|
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caps = gst_pad_get_allowed_caps (base_video_decoder->srcpad);
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if (!caps)
|
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goto null_allowed_caps;
|
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if (gst_caps_is_empty (caps))
|
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goto empty_allowed_caps;
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|
|
gst_caps_set_simple (caps,
|
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"width", G_TYPE_INT, state->width,
|
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"height", G_TYPE_INT, state->height,
|
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"pixel-aspect-ratio", GST_TYPE_FRACTION, state->par_n, state->par_d,
|
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"interlaced", G_TYPE_BOOLEAN, state->interlaced, NULL);
|
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|
|
if (state->fps_d != 0)
|
|
gst_caps_set_simple (caps,
|
|
"framerate", GST_TYPE_FRACTION, state->fps_n, state->fps_d, NULL);
|
|
|
|
|
|
gst_pad_fixate_caps (base_video_decoder->srcpad, caps);
|
|
GST_DEBUG ("setting caps %" GST_PTR_FORMAT, caps);
|
|
|
|
base_video_decoder->have_src_caps =
|
|
gst_pad_set_caps (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder),
|
|
caps);
|
|
gst_caps_unref (caps);
|
|
|
|
return base_video_decoder->have_src_caps;
|
|
|
|
null_allowed_caps:
|
|
GST_ERROR_OBJECT (base_video_decoder,
|
|
"Got null from gst_pad_get_allowed_caps");
|
|
return FALSE;
|
|
|
|
empty_allowed_caps:
|
|
GST_ERROR_OBJECT (base_video_decoder,
|
|
"Got EMPTY caps from gst_pad_get_allowed_caps");
|
|
|
|
gst_caps_unref (caps);
|
|
return FALSE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_video_decoder_drain (GstBaseVideoDecoder * dec, gboolean at_eos)
|
|
{
|
|
GstBaseVideoDecoderClass *klass;
|
|
GstBaseVideoDecoderScanResult res;
|
|
guint size;
|
|
|
|
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (dec);
|
|
|
|
if (gst_adapter_available (dec->input_adapter) == 0)
|
|
return GST_FLOW_OK;
|
|
|
|
lost_sync:
|
|
if (!dec->have_sync) {
|
|
gint n, m;
|
|
|
|
GST_DEBUG ("no sync, scanning");
|
|
|
|
n = gst_adapter_available (dec->input_adapter);
|
|
m = klass->scan_for_sync (dec, dec->input_adapter);
|
|
if (m == -1) {
|
|
gst_object_unref (dec);
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
if (m < 0) {
|
|
g_warning ("subclass returned negative scan %d", m);
|
|
}
|
|
|
|
if (m >= n) {
|
|
GST_ERROR ("subclass scanned past end %d >= %d", m, n);
|
|
}
|
|
|
|
gst_adapter_flush (dec->input_adapter, m);
|
|
|
|
if (m < n) {
|
|
GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n);
|
|
/* this is only "maybe" sync */
|
|
dec->have_sync = TRUE;
|
|
}
|
|
|
|
if (!dec->have_sync) {
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
res = klass->scan_for_packet_end (dec, dec->input_adapter, &size, at_eos);
|
|
while (res == GST_BASE_VIDEO_DECODER_SCAN_RESULT_OK) {
|
|
GstBuffer *buf;
|
|
GstFlowReturn ret;
|
|
|
|
GST_DEBUG ("Packet size: %u", size);
|
|
if (size > gst_adapter_available (dec->input_adapter))
|
|
return GST_FLOW_OK;
|
|
|
|
buf = gst_adapter_take_buffer (dec->input_adapter, size);
|
|
|
|
dec->prev_buf_offset = dec->current_buf_offset;
|
|
dec->current_buf_offset = dec->input_offset -
|
|
gst_adapter_available (dec->input_adapter);
|
|
|
|
ret = klass->parse_data (dec, buf, at_eos, dec->current_frame);
|
|
if (ret != GST_FLOW_OK)
|
|
return ret;
|
|
|
|
res = klass->scan_for_packet_end (dec, dec->input_adapter, &size, at_eos);
|
|
}
|
|
|
|
switch (res) {
|
|
case GST_BASE_VIDEO_DECODER_SCAN_RESULT_LOST_SYNC:
|
|
dec->have_sync = FALSE;
|
|
goto lost_sync;
|
|
|
|
case GST_BASE_VIDEO_DECODER_SCAN_RESULT_NEED_DATA:
|
|
return GST_FLOW_OK;
|
|
|
|
default:
|
|
GST_ERROR_OBJECT (dec, "Subclass returned invalid scan result");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
|
|
{
|
|
GstBaseVideoDecoder *base_video_decoder;
|
|
GstFlowReturn ret;
|
|
|
|
GST_DEBUG ("chain %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
|
|
|
|
#if 0
|
|
/* requiring the pad to be negotiated makes it impossible to use
|
|
* oggdemux or filesrc ! decoder */
|
|
if (!gst_pad_is_negotiated (pad)) {
|
|
GST_DEBUG ("not negotiated");
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
#endif
|
|
|
|
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
|
|
|
|
GST_DEBUG_OBJECT (base_video_decoder, "chain");
|
|
|
|
if (!base_video_decoder->have_segment) {
|
|
GstEvent *event;
|
|
GstFlowReturn ret;
|
|
|
|
GST_WARNING
|
|
("Received buffer without a new-segment. Assuming timestamps start from 0.");
|
|
|
|
gst_segment_set_newsegment_full (&base_video_decoder->segment,
|
|
FALSE, 1.0, 1.0, GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
|
|
base_video_decoder->have_segment = TRUE;
|
|
|
|
event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0,
|
|
GST_CLOCK_TIME_NONE, 0);
|
|
|
|
ret =
|
|
gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder),
|
|
event);
|
|
if (!ret) {
|
|
GST_ERROR ("new segment event ret=%d", ret);
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
|
|
GST_DEBUG_OBJECT (base_video_decoder, "received DISCONT buffer");
|
|
gst_base_video_decoder_flush (base_video_decoder);
|
|
}
|
|
|
|
base_video_decoder->input_offset += GST_BUFFER_SIZE (buf);
|
|
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
|
|
gst_base_video_decoder_add_timestamp (base_video_decoder, buf);
|
|
}
|
|
|
|
if (!base_video_decoder->current_frame)
|
|
base_video_decoder->current_frame =
|
|
gst_base_video_decoder_new_frame (base_video_decoder);
|
|
|
|
if (base_video_decoder->packetized) {
|
|
base_video_decoder->current_frame->sink_buffer = buf;
|
|
|
|
ret = gst_base_video_decoder_have_frame (base_video_decoder, TRUE, NULL);
|
|
} else {
|
|
|
|
gst_adapter_push (base_video_decoder->input_adapter, buf);
|
|
|
|
ret = gst_base_video_decoder_drain (base_video_decoder, FALSE);
|
|
}
|
|
|
|
gst_object_unref (base_video_decoder);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_video_decoder_stop (GstBaseVideoDecoder * base_video_decoder)
|
|
{
|
|
GstBaseVideoDecoderClass *base_video_decoder_class;
|
|
|
|
GST_DEBUG ("stop");
|
|
|
|
base_video_decoder_class =
|
|
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
|
|
|
|
gst_base_video_decoder_reset (base_video_decoder);
|
|
|
|
if (base_video_decoder_class->stop)
|
|
return base_video_decoder_class->stop (base_video_decoder);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_video_decoder_start (GstBaseVideoDecoder * base_video_decoder)
|
|
{
|
|
GstBaseVideoDecoderClass *base_video_decoder_class;
|
|
|
|
GST_DEBUG ("start");
|
|
|
|
base_video_decoder_class =
|
|
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
|
|
|
|
gst_base_video_decoder_reset (base_video_decoder);
|
|
gst_base_video_decoder_reset_state (&base_video_decoder->state);
|
|
|
|
gst_segment_init (&base_video_decoder->segment, GST_FORMAT_TIME);
|
|
|
|
if (base_video_decoder_class->start)
|
|
return base_video_decoder_class->start (base_video_decoder);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_base_video_decoder_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstBaseVideoDecoder *base_video_decoder;
|
|
GstStateChangeReturn ret;
|
|
|
|
base_video_decoder = GST_BASE_VIDEO_DECODER (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
if (!gst_base_video_decoder_start (base_video_decoder))
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
if (!gst_base_video_decoder_stop (base_video_decoder))
|
|
ret = GST_STATE_CHANGE_FAILURE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_video_decoder_check_timestamp (GstBaseVideoDecoder *
|
|
base_video_decoder, GstClockTime timestamp)
|
|
{
|
|
if (timestamp == GST_CLOCK_TIME_NONE)
|
|
return FALSE;
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_timestamp))
|
|
return timestamp > base_video_decoder->last_timestamp;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_base_video_decoder_calculate_timestamps (GstBaseVideoDecoder *
|
|
base_video_decoder, GstVideoFrame * frame,
|
|
GstClockTime * presentation_timestamp, GstClockTime * presentation_duration)
|
|
{
|
|
GST_DEBUG ("calculate timestamps sync=%d upstream timestamp: %"
|
|
GST_TIME_FORMAT " parsed timestamp: %" GST_TIME_FORMAT,
|
|
GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_SYNC_POINT),
|
|
GST_TIME_ARGS (frame->upstream_timestamp),
|
|
GST_TIME_ARGS (frame->parsed_timestamp));
|
|
|
|
*presentation_timestamp = GST_CLOCK_TIME_NONE;
|
|
*presentation_duration = GST_CLOCK_TIME_NONE;
|
|
|
|
if (gst_base_video_decoder_check_timestamp (base_video_decoder,
|
|
frame->upstream_timestamp)) {
|
|
*presentation_timestamp = frame->upstream_timestamp;
|
|
*presentation_duration = frame->upstream_duration;
|
|
}
|
|
|
|
else if (gst_base_video_decoder_check_timestamp (base_video_decoder,
|
|
frame->parsed_timestamp))
|
|
*presentation_timestamp = frame->parsed_timestamp;
|
|
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (*presentation_timestamp)) {
|
|
GST_DEBUG ("sync timestamp %" GST_TIME_FORMAT " diff %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (*presentation_timestamp),
|
|
GST_TIME_ARGS (*presentation_timestamp -
|
|
base_video_decoder->segment.start));
|
|
base_video_decoder->timestamp_offset = *presentation_timestamp;
|
|
base_video_decoder->field_index = 0;
|
|
}
|
|
|
|
else {
|
|
if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_SYNC_POINT)) {
|
|
GST_WARNING ("sync point doesn't have timestamp");
|
|
if (!GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) {
|
|
GST_WARNING
|
|
("No base timestamp. Assuming frames start at segment start");
|
|
base_video_decoder->timestamp_offset =
|
|
base_video_decoder->segment.start;
|
|
base_video_decoder->field_index = 0;
|
|
}
|
|
}
|
|
|
|
*presentation_timestamp =
|
|
gst_base_video_decoder_get_field_timestamp (base_video_decoder,
|
|
base_video_decoder->field_index);
|
|
}
|
|
|
|
if (*presentation_duration == GST_CLOCK_TIME_NONE) {
|
|
*presentation_duration =
|
|
gst_base_video_decoder_get_field_duration (base_video_decoder,
|
|
frame->n_fields);
|
|
}
|
|
|
|
base_video_decoder->field_index += frame->n_fields;
|
|
base_video_decoder->last_timestamp = *presentation_timestamp;
|
|
}
|
|
|
|
GstFlowReturn
|
|
gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
|
|
GstVideoFrame * frame)
|
|
{
|
|
GstBaseVideoDecoderClass *base_video_decoder_class;
|
|
|
|
GstClockTime presentation_timestamp;
|
|
GstClockTime presentation_duration;
|
|
|
|
GstBuffer *src_buffer;
|
|
|
|
GST_DEBUG ("finish frame");
|
|
|
|
base_video_decoder_class =
|
|
GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
|
|
|
|
|
|
if (!gst_base_video_decoder_set_src_caps (base_video_decoder))
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
|
|
gst_base_video_decoder_calculate_timestamps (base_video_decoder, frame,
|
|
&presentation_timestamp, &presentation_duration);
|
|
|
|
src_buffer = frame->src_buffer;
|
|
|
|
GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
if (base_video_decoder->state.interlaced) {
|
|
#ifndef GST_VIDEO_BUFFER_TFF
|
|
#define GST_VIDEO_BUFFER_TFF (GST_MINI_OBJECT_FLAG_LAST << 5)
|
|
#endif
|
|
#ifndef GST_VIDEO_BUFFER_RFF
|
|
#define GST_VIDEO_BUFFER_RFF (GST_MINI_OBJECT_FLAG_LAST << 6)
|
|
#endif
|
|
#ifndef GST_VIDEO_BUFFER_ONEFIELD
|
|
#define GST_VIDEO_BUFFER_ONEFIELD (GST_MINI_OBJECT_FLAG_LAST << 7)
|
|
#endif
|
|
|
|
if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_TFF)) {
|
|
GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_TFF);
|
|
} else {
|
|
GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_TFF);
|
|
}
|
|
GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_RFF);
|
|
GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD);
|
|
if (frame->n_fields == 3) {
|
|
GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_RFF);
|
|
} else if (frame->n_fields == 1) {
|
|
GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD);
|
|
}
|
|
}
|
|
if (base_video_decoder->discont) {
|
|
GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DISCONT);
|
|
base_video_decoder->discont = FALSE;
|
|
}
|
|
|
|
GST_BUFFER_TIMESTAMP (src_buffer) = presentation_timestamp;
|
|
GST_BUFFER_DURATION (src_buffer) = presentation_duration;
|
|
GST_BUFFER_OFFSET (src_buffer) = GST_BUFFER_OFFSET_NONE;
|
|
GST_BUFFER_OFFSET_END (src_buffer) = GST_BUFFER_OFFSET_NONE;
|
|
|
|
GST_DEBUG ("pushing frame %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (presentation_timestamp));
|
|
|
|
if (base_video_decoder->sink_clipping) {
|
|
gint64 start = GST_BUFFER_TIMESTAMP (src_buffer);
|
|
gint64 stop = GST_BUFFER_TIMESTAMP (src_buffer) +
|
|
GST_BUFFER_DURATION (src_buffer);
|
|
|
|
if (gst_segment_clip (&base_video_decoder->segment, GST_FORMAT_TIME,
|
|
start, stop, &start, &stop)) {
|
|
GST_BUFFER_TIMESTAMP (src_buffer) = start;
|
|
GST_BUFFER_DURATION (src_buffer) = stop - start;
|
|
GST_DEBUG ("accepting buffer inside segment: %" GST_TIME_FORMAT
|
|
" %" GST_TIME_FORMAT
|
|
" seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
|
|
" time %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) +
|
|
GST_BUFFER_DURATION (src_buffer)),
|
|
GST_TIME_ARGS (base_video_decoder->segment.start),
|
|
GST_TIME_ARGS (base_video_decoder->segment.stop),
|
|
GST_TIME_ARGS (base_video_decoder->segment.time));
|
|
} else {
|
|
GST_DEBUG ("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 (GST_BUFFER_TIMESTAMP (src_buffer)),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) +
|
|
GST_BUFFER_DURATION (src_buffer)),
|
|
GST_TIME_ARGS (base_video_decoder->segment.start),
|
|
GST_TIME_ARGS (base_video_decoder->segment.stop),
|
|
GST_TIME_ARGS (base_video_decoder->segment.time));
|
|
gst_video_frame_unref (frame);
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
gst_buffer_ref (src_buffer);
|
|
gst_video_frame_unref (frame);
|
|
|
|
if (base_video_decoder_class->shape_output)
|
|
return base_video_decoder_class->shape_output (base_video_decoder,
|
|
src_buffer);
|
|
|
|
return gst_pad_push (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder),
|
|
src_buffer);
|
|
}
|
|
|
|
void
|
|
gst_base_video_decoder_skip_frame (GstBaseVideoDecoder * base_video_decoder,
|
|
GstVideoFrame * frame)
|
|
{
|
|
GstClockTime presentation_timestamp;
|
|
GstClockTime presentation_duration;
|
|
|
|
GST_DEBUG ("skip frame");
|
|
|
|
gst_base_video_decoder_calculate_timestamps (base_video_decoder, frame,
|
|
&presentation_timestamp, &presentation_duration);
|
|
|
|
GST_DEBUG ("skipping frame %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (presentation_timestamp));
|
|
|
|
gst_video_frame_unref (frame);
|
|
}
|
|
|
|
GstFlowReturn
|
|
gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder,
|
|
gboolean include_current_buf, GstVideoFrame ** new_frame)
|
|
{
|
|
GstVideoFrame *frame = base_video_decoder->current_frame;
|
|
GstBaseVideoDecoderClass *klass;
|
|
|
|
guint64 frame_end_offset;
|
|
GstClockTime timestamp, duration;
|
|
GstClockTime running_time;
|
|
GstClockTimeDiff deadline;
|
|
GstFlowReturn ret;
|
|
|
|
klass = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
|
|
|
|
if (include_current_buf)
|
|
frame_end_offset = base_video_decoder->current_buf_offset;
|
|
else
|
|
frame_end_offset = base_video_decoder->prev_buf_offset;
|
|
|
|
gst_base_video_decoder_get_timestamp_at_offset (base_video_decoder,
|
|
frame_end_offset, ×tamp, &duration);
|
|
|
|
frame->upstream_timestamp = timestamp;
|
|
frame->upstream_duration = duration;
|
|
|
|
GST_DEBUG ("upstream timestamp %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (frame->upstream_timestamp));
|
|
|
|
running_time = gst_segment_to_running_time (&base_video_decoder->segment,
|
|
GST_FORMAT_TIME, frame->upstream_timestamp);
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->earliest_time))
|
|
deadline = GST_CLOCK_DIFF (base_video_decoder->earliest_time, running_time);
|
|
else
|
|
deadline = G_MAXINT64;
|
|
|
|
/* do something with frame */
|
|
ret = klass->handle_frame (base_video_decoder, frame, deadline);
|
|
if (ret != GST_FLOW_OK) {
|
|
GST_DEBUG ("flow error!");
|
|
}
|
|
|
|
/* create new frame */
|
|
base_video_decoder->current_frame =
|
|
gst_base_video_decoder_new_frame (base_video_decoder);
|
|
|
|
if (new_frame)
|
|
*new_frame = base_video_decoder->current_frame;
|
|
|
|
return ret;
|
|
}
|
|
|
|
GstVideoState
|
|
gst_base_video_decoder_get_state (GstBaseVideoDecoder * base_video_decoder)
|
|
{
|
|
return base_video_decoder->state;
|
|
}
|
|
|
|
void
|
|
gst_base_video_decoder_set_state (GstBaseVideoDecoder * base_video_decoder,
|
|
GstVideoState state)
|
|
{
|
|
base_video_decoder->state = state;
|
|
|
|
base_video_decoder->have_src_caps = FALSE;
|
|
}
|
|
|
|
void
|
|
gst_base_video_decoder_lost_sync (GstBaseVideoDecoder * base_video_decoder)
|
|
{
|
|
g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (base_video_decoder));
|
|
|
|
GST_DEBUG ("lost_sync");
|
|
|
|
if (gst_adapter_available (base_video_decoder->input_adapter) >= 1) {
|
|
gst_adapter_flush (base_video_decoder->input_adapter, 1);
|
|
}
|
|
|
|
base_video_decoder->have_sync = FALSE;
|
|
}
|
|
|
|
/* GObject vmethod implementations */
|
|
static void
|
|
gst_base_video_decoder_get_property (GObject * object, guint property_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseVideoDecoder *base_video_decoder = GST_BASE_VIDEO_DECODER (object);
|
|
|
|
switch (property_id) {
|
|
case PROP_PACKETIZED:
|
|
g_value_set_boolean (value, base_video_decoder->packetized);
|
|
break;
|
|
case PROP_SINK_CLIPPING:
|
|
g_value_set_boolean (value, base_video_decoder->sink_clipping);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_video_decoder_set_property (GObject * object, guint property_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseVideoDecoder *base_video_decoder = GST_BASE_VIDEO_DECODER (object);
|
|
|
|
switch (property_id) {
|
|
case PROP_PACKETIZED:
|
|
base_video_decoder->packetized = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_SINK_CLIPPING:
|
|
base_video_decoder->sink_clipping = g_value_get_boolean (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_video_decoder_finalize (GObject * object)
|
|
{
|
|
GstBaseVideoDecoder *base_video_decoder;
|
|
|
|
g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (object));
|
|
base_video_decoder = GST_BASE_VIDEO_DECODER (object);
|
|
|
|
g_object_unref (base_video_decoder->input_adapter);
|
|
|
|
GST_DEBUG_OBJECT (object, "finalize");
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_base_video_decoder_base_init (gpointer g_class)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (basevideodecoder_debug, "basevideodecoder", 0,
|
|
"Base Video Decoder");
|
|
}
|
|
|
|
static void
|
|
gst_base_video_decoder_class_init (GstBaseVideoDecoderClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
|
|
gobject_class = G_OBJECT_CLASS (klass);
|
|
gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class->finalize = gst_base_video_decoder_finalize;
|
|
gobject_class->get_property = gst_base_video_decoder_get_property;
|
|
gobject_class->set_property = gst_base_video_decoder_set_property;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_PACKETIZED,
|
|
g_param_spec_boolean ("packetized", "Packetized",
|
|
"Whether the incoming data is already packetized into suitable "
|
|
"packets", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_PACKETIZED,
|
|
g_param_spec_boolean ("sink-clipping", "Sink Clipping",
|
|
"If enabled GstBaseVideoDecoder will clip outgoing frames", FALSE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gstelement_class->change_state = gst_base_video_decoder_change_state;
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
}
|
|
|
|
static void
|
|
gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder,
|
|
GstBaseVideoDecoderClass * base_video_decoder_class)
|
|
{
|
|
GstPadTemplate *pad_template;
|
|
GstPad *pad;
|
|
|
|
GST_DEBUG ("gst_base_video_decoder_init");
|
|
|
|
pad_template =
|
|
gst_element_class_get_pad_template (GST_ELEMENT_CLASS
|
|
(base_video_decoder_class), "sink");
|
|
g_return_if_fail (pad_template != NULL);
|
|
|
|
base_video_decoder->sinkpad = pad =
|
|
gst_pad_new_from_template (pad_template, "sink");
|
|
gst_element_add_pad (GST_ELEMENT (base_video_decoder), pad);
|
|
|
|
gst_pad_set_chain_function (pad, gst_base_video_decoder_chain);
|
|
gst_pad_set_event_function (pad, gst_base_video_decoder_sink_event);
|
|
gst_pad_set_setcaps_function (pad, gst_base_video_decoder_sink_setcaps);
|
|
gst_pad_set_query_function (pad, gst_base_video_decoder_sink_query);
|
|
|
|
if (base_video_decoder_class->create_srcpad) {
|
|
base_video_decoder->srcpad = pad =
|
|
base_video_decoder_class->create_srcpad (base_video_decoder,
|
|
base_video_decoder_class);
|
|
} else {
|
|
pad_template =
|
|
gst_element_class_get_pad_template (GST_ELEMENT_CLASS
|
|
(base_video_decoder_class), "src");
|
|
g_return_if_fail (pad_template != NULL);
|
|
|
|
base_video_decoder->srcpad = pad =
|
|
gst_pad_new_from_template (pad_template, "src");
|
|
}
|
|
gst_element_add_pad (GST_ELEMENT (base_video_decoder), pad);
|
|
|
|
gst_pad_set_event_function (pad, gst_base_video_decoder_src_event);
|
|
gst_pad_set_query_type_function (pad, gst_base_video_decoder_get_query_types);
|
|
gst_pad_set_query_function (pad, gst_base_video_decoder_src_query);
|
|
gst_pad_use_fixed_caps (pad);
|
|
|
|
base_video_decoder->input_adapter = gst_adapter_new ();
|
|
memset (&base_video_decoder->state, 0, sizeof (GstVideoState));
|
|
|
|
/* properties */
|
|
base_video_decoder->packetized = FALSE;
|
|
base_video_decoder->sink_clipping = TRUE;
|
|
}
|