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657 lines
19 KiB
C
657 lines
19 KiB
C
/* GStreamer
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* Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
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* Copyright (c) 2012 Collabora Ltd.
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* Author : Edward Hervey <edward@collabora.com>
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* Author : Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
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* Copyright (c) 2013 Sebastian Dröge <slomo@circular-chaos.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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-daaladec
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* @see_also: daalaenc, oggdemux
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*
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* This element decodes daala streams into raw video
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* <ulink url="http://www.xiph.org/daala/">Daala</ulink> is a royalty-free
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* video codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
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* Foundation</ulink>.
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*
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* <refsect2>
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* <title>Example pipeline</title>
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* |[
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* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! daaladec ! xvimagesink
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* ]| This example pipeline will decode an ogg stream and decodes the daala video. Refer to
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* the daalaenc example to create the ogg file.
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* </refsect2>
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*
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* Last reviewed on 2006-03-01 (0.10.4)
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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 "gstdaaladec.h"
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#include <gst/tag/tag.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include <gst/video/gstvideopool.h>
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#define GST_CAT_DEFAULT daaladec_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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GST_DEBUG_CATEGORY_EXTERN (GST_CAT_PERFORMANCE);
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/* This was removed from the base class, this is used as a
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temporary return to signal the need to call _drop_frame,
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and does not leave daalaenc. */
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#define GST_CUSTOM_FLOW_DROP GST_FLOW_CUSTOM_SUCCESS_1
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enum
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{
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PROP_0
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};
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static GstStaticPadTemplate daala_dec_src_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) { I420, Y444 }, "
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"framerate = (fraction) [0/1, MAX], "
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"width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]")
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);
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static GstStaticPadTemplate daala_dec_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-daala")
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);
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#define gst_daala_dec_parent_class parent_class
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G_DEFINE_TYPE (GstDaalaDec, gst_daala_dec, GST_TYPE_VIDEO_DECODER);
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static gboolean daala_dec_start (GstVideoDecoder * decoder);
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static gboolean daala_dec_stop (GstVideoDecoder * decoder);
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static gboolean daala_dec_set_format (GstVideoDecoder * decoder,
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GstVideoCodecState * state);
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static GstFlowReturn daala_dec_parse (GstVideoDecoder * decoder,
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GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
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static GstFlowReturn daala_dec_handle_frame (GstVideoDecoder * decoder,
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GstVideoCodecFrame * frame);
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static gboolean daala_dec_decide_allocation (GstVideoDecoder * decoder,
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GstQuery * query);
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static GstFlowReturn daala_dec_decode_buffer (GstDaalaDec * dec,
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GstBuffer * buf, GstVideoCodecFrame * frame);
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static void
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gst_daala_dec_class_init (GstDaalaDecClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstVideoDecoderClass *video_decoder_class = GST_VIDEO_DECODER_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&daala_dec_src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&daala_dec_sink_factory));
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gst_element_class_set_static_metadata (element_class,
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"Daala video decoder", "Codec/Decoder/Video",
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"Decode raw Daala streams to raw YUV video",
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"Sebastian Dröge <slomo@circular-chaos.org>");
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video_decoder_class->start = GST_DEBUG_FUNCPTR (daala_dec_start);
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video_decoder_class->stop = GST_DEBUG_FUNCPTR (daala_dec_stop);
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video_decoder_class->set_format = GST_DEBUG_FUNCPTR (daala_dec_set_format);
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video_decoder_class->parse = GST_DEBUG_FUNCPTR (daala_dec_parse);
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video_decoder_class->handle_frame =
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GST_DEBUG_FUNCPTR (daala_dec_handle_frame);
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video_decoder_class->decide_allocation =
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GST_DEBUG_FUNCPTR (daala_dec_decide_allocation);
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GST_DEBUG_CATEGORY_INIT (daaladec_debug, "daaladec", 0, "Daala decoder");
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}
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static void
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gst_daala_dec_init (GstDaalaDec * dec)
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{
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/* input is packetized,
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* but is not marked that way so data gets parsed and keyframes marked */
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gst_video_decoder_set_packetized (GST_VIDEO_DECODER (dec), FALSE);
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gst_video_decoder_set_needs_format (GST_VIDEO_DECODER (dec), TRUE);
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}
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static void
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daala_dec_reset (GstDaalaDec * dec)
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{
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dec->need_keyframe = TRUE;
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}
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static gboolean
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daala_dec_start (GstVideoDecoder * decoder)
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{
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GstDaalaDec *dec = GST_DAALA_DEC (decoder);
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GST_DEBUG_OBJECT (dec, "start");
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daala_info_clear (&dec->info);
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daala_comment_clear (&dec->comment);
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GST_DEBUG_OBJECT (dec, "Setting have_header to FALSE");
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dec->have_header = FALSE;
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daala_dec_reset (dec);
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return TRUE;
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}
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static gboolean
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daala_dec_stop (GstVideoDecoder * decoder)
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{
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GstDaalaDec *dec = GST_DAALA_DEC (decoder);
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GST_DEBUG_OBJECT (dec, "stop");
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daala_info_clear (&dec->info);
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daala_comment_clear (&dec->comment);
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daala_setup_free (dec->setup);
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dec->setup = NULL;
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daala_decode_free (dec->decoder);
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dec->decoder = NULL;
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daala_dec_reset (dec);
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if (dec->input_state) {
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gst_video_codec_state_unref (dec->input_state);
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dec->input_state = NULL;
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}
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if (dec->output_state) {
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gst_video_codec_state_unref (dec->output_state);
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dec->output_state = NULL;
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}
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return TRUE;
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}
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static GstFlowReturn
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daala_dec_parse (GstVideoDecoder * decoder,
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GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos)
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{
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gint av;
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const guint8 *data;
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av = gst_adapter_available (adapter);
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if (av > 0) {
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data = gst_adapter_map (adapter, 1);
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/* check for keyframe; must not be header packet */
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if (!(data[0] & 0x80) && (data[0] & 0x40)) {
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GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
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}
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gst_adapter_unmap (adapter);
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}
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/* and pass along all */
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gst_video_decoder_add_to_frame (decoder, av);
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return gst_video_decoder_have_frame (decoder);
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}
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static gboolean
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daala_dec_set_format (GstVideoDecoder * bdec, GstVideoCodecState * state)
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{
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GstDaalaDec *dec;
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dec = GST_DAALA_DEC (bdec);
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/* Keep a copy of the input state */
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if (dec->input_state)
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gst_video_codec_state_unref (dec->input_state);
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dec->input_state = gst_video_codec_state_ref (state);
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/* FIXME : Interesting, we always accept any kind of caps ? */
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if (state->codec_data) {
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GstBuffer *buffer;
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GstMapInfo minfo;
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guint8 *data;
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guint size;
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guint offset;
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buffer = state->codec_data;
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gst_buffer_map (buffer, &minfo, GST_MAP_READ);
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offset = 0;
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size = minfo.size;
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data = (guint8 *) minfo.data;
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while (size > 2) {
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guint psize;
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GstBuffer *buf;
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psize = (data[0] << 8) | data[1];
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/* skip header */
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data += 2;
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size -= 2;
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offset += 2;
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/* make sure we don't read too much */
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psize = MIN (psize, size);
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buf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, offset, psize);
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/* first buffer is a discont buffer */
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if (offset == 2)
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
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/* now feed it to the decoder we can ignore the error */
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daala_dec_decode_buffer (dec, buf, NULL);
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gst_buffer_unref (buf);
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/* skip the data */
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size -= psize;
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data += psize;
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offset += psize;
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}
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gst_buffer_unmap (buffer, &minfo);
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}
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GST_DEBUG_OBJECT (dec, "Done");
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return TRUE;
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}
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static GstFlowReturn
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daala_handle_comment_packet (GstDaalaDec * dec, ogg_packet * packet)
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{
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gchar *encoder = NULL;
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GstTagList *list;
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GST_DEBUG_OBJECT (dec, "parsing comment packet");
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list =
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gst_tag_list_from_vorbiscomment (packet->packet, packet->bytes,
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(guint8 *) "\201daala", 6, &encoder);
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if (!list) {
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GST_ERROR_OBJECT (dec, "couldn't decode comments");
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list = gst_tag_list_new_empty ();
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}
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if (encoder) {
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gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
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GST_TAG_ENCODER, encoder, NULL);
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g_free (encoder);
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}
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gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
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GST_TAG_ENCODER_VERSION, dec->info.version_major,
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GST_TAG_VIDEO_CODEC, "Daala", NULL);
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gst_video_decoder_merge_tags (GST_VIDEO_DECODER (dec),
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list, GST_TAG_MERGE_REPLACE);
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gst_tag_list_unref (list);
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return GST_FLOW_OK;
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}
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static GstFlowReturn
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daala_handle_type_packet (GstDaalaDec * dec)
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{
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gint par_num, par_den;
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GstFlowReturn ret = GST_FLOW_OK;
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GstVideoCodecState *state;
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GstVideoFormat fmt;
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GstVideoInfo *info;
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if (!dec->input_state)
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return GST_FLOW_NOT_NEGOTIATED;
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info = &dec->input_state->info;
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GST_DEBUG_OBJECT (dec, "fps %d/%d, PAR %d/%d",
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dec->info.timebase_numerator, dec->info.timebase_denominator,
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dec->info.pixel_aspect_numerator, dec->info.pixel_aspect_denominator);
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/* calculate par
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* the info.aspect_* values reflect PAR;
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* 0:x and x:0 are allowed and can be interpreted as 1:1.
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*/
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par_num = GST_VIDEO_INFO_PAR_N (info);
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par_den = GST_VIDEO_INFO_PAR_D (info);
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/* If we have a default PAR, see if the decoder specified a different one */
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if (par_num == 1 && par_den == 1 &&
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(dec->info.pixel_aspect_numerator != 0
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&& dec->info.pixel_aspect_denominator != 0)) {
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par_num = dec->info.pixel_aspect_numerator;
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par_den = dec->info.pixel_aspect_denominator;
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}
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/* daala has:
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*
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* width/height : dimension of the encoded frame
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* pic_width/pic_height : dimension of the visible part
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* pic_x/pic_y : offset in encoded frame where visible part starts
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*/
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GST_DEBUG_OBJECT (dec, "dimension %dx%d, PAR %d/%d", dec->info.pic_width,
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dec->info.pic_height, par_num, par_den);
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if (dec->info.nplanes == 3 && dec->info.plane_info[0].xdec == 0 &&
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dec->info.plane_info[0].ydec == 0 &&
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dec->info.plane_info[1].xdec == 1 &&
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dec->info.plane_info[1].ydec == 1 &&
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dec->info.plane_info[2].xdec == 1 && dec->info.plane_info[2].ydec == 1) {
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fmt = GST_VIDEO_FORMAT_I420;
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} else if (dec->info.nplanes == 3 && dec->info.plane_info[0].xdec == 0 &&
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dec->info.plane_info[0].ydec == 0 &&
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dec->info.plane_info[1].xdec == 0 &&
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dec->info.plane_info[1].ydec == 0 &&
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dec->info.plane_info[2].xdec == 0 && dec->info.plane_info[2].ydec == 0) {
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fmt = GST_VIDEO_FORMAT_Y444;
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} else {
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goto unsupported_format;
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}
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GST_VIDEO_INFO_WIDTH (info) = dec->info.pic_width;
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GST_VIDEO_INFO_HEIGHT (info) = dec->info.pic_height;
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/* done */
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dec->decoder = daala_decode_alloc (&dec->info, dec->setup);
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/* Create the output state */
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dec->output_state = state =
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gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec), fmt,
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info->width, info->height, dec->input_state);
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/* FIXME : Do we still need to set fps/par now that we pass the reference input stream ? */
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state->info.fps_n = dec->info.timebase_numerator;
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state->info.fps_d = dec->info.timebase_denominator;
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state->info.par_n = par_num;
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state->info.par_d = par_den;
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gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
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dec->have_header = TRUE;
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return ret;
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/* ERRORS */
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unsupported_format:
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{
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GST_ERROR_OBJECT (dec, "Invalid pixel format");
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return GST_FLOW_ERROR;
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}
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}
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static GstFlowReturn
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daala_handle_header_packet (GstDaalaDec * dec, ogg_packet * packet)
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{
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GstFlowReturn res;
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int ret;
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GST_DEBUG_OBJECT (dec, "parsing header packet");
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ret = daala_decode_header_in (&dec->info, &dec->comment, &dec->setup, packet);
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if (ret < 0)
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goto header_read_error;
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switch (packet->packet[0]) {
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case 0x81:
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res = daala_handle_comment_packet (dec, packet);
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break;
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case 0x82:
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res = daala_handle_type_packet (dec);
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break;
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default:
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/* ignore */
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g_warning ("unknown daala header packet found");
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case 0x80:
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/* nothing special, this is the identification header */
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res = GST_FLOW_OK;
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break;
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}
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return res;
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/* ERRORS */
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header_read_error:
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{
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GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
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(NULL), ("couldn't read header packet"));
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return GST_FLOW_ERROR;
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}
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}
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/* Allocate buffer and copy image data into Y444 format */
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static GstFlowReturn
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daala_handle_image (GstDaalaDec * dec, od_img * img, GstVideoCodecFrame * frame)
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{
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GstVideoDecoder *decoder = GST_VIDEO_DECODER (dec);
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gint width, height, stride;
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GstFlowReturn result;
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gint i, comp;
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guint8 *dest, *src;
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GstVideoFrame vframe;
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result = gst_video_decoder_allocate_output_frame (decoder, frame);
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if (G_UNLIKELY (result != GST_FLOW_OK)) {
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GST_DEBUG_OBJECT (dec, "could not get buffer, reason: %s",
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gst_flow_get_name (result));
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return result;
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}
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/* if only libdaala would allow us to give it a destination frame */
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GST_CAT_TRACE_OBJECT (GST_CAT_PERFORMANCE, dec,
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"doing unavoidable video frame copy");
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if (G_UNLIKELY (!gst_video_frame_map (&vframe, &dec->output_state->info,
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frame->output_buffer, GST_MAP_WRITE)))
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goto invalid_frame;
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for (comp = 0; comp < 3; comp++) {
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width = GST_VIDEO_FRAME_COMP_WIDTH (&vframe, comp);
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height = GST_VIDEO_FRAME_COMP_HEIGHT (&vframe, comp);
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stride = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, comp);
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dest = GST_VIDEO_FRAME_COMP_DATA (&vframe, comp);
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src = img->planes[comp].data;
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for (i = 0; i < height; i++) {
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memcpy (dest, src, width);
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dest += stride;
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src += img->planes[comp].ystride;
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}
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}
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gst_video_frame_unmap (&vframe);
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return GST_FLOW_OK;
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invalid_frame:
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{
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GST_DEBUG_OBJECT (dec, "could not map video frame");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
daala_handle_data_packet (GstDaalaDec * dec, ogg_packet * packet,
|
|
GstVideoCodecFrame * frame)
|
|
{
|
|
/* normal data packet */
|
|
od_img img;
|
|
gboolean keyframe;
|
|
GstFlowReturn result;
|
|
|
|
if (G_UNLIKELY (!dec->have_header))
|
|
goto not_initialized;
|
|
|
|
/* the second most significant bit of the first data byte is cleared
|
|
* for keyframes. We can only check it if it's not a zero-length packet. */
|
|
keyframe = packet->bytes && ((packet->packet[0] & 0x40));
|
|
if (G_UNLIKELY (keyframe)) {
|
|
GST_DEBUG_OBJECT (dec, "we have a keyframe");
|
|
dec->need_keyframe = FALSE;
|
|
} else if (G_UNLIKELY (dec->need_keyframe)) {
|
|
goto dropping;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (dec, "parsing data packet");
|
|
|
|
/* this does the decoding */
|
|
if (G_UNLIKELY (daala_decode_packet_in (dec->decoder, &img, packet) < 0))
|
|
goto decode_error;
|
|
|
|
if (frame &&
|
|
(gst_video_decoder_get_max_decode_time (GST_VIDEO_DECODER (dec),
|
|
frame) < 0))
|
|
goto dropping_qos;
|
|
|
|
if (G_UNLIKELY ((img.width != dec->info.pic_width
|
|
|| img.height != dec->info.pic_height)))
|
|
goto wrong_dimensions;
|
|
|
|
result = daala_handle_image (dec, &img, frame);
|
|
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
not_initialized:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
(NULL), ("no header sent yet"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
dropping:
|
|
{
|
|
GST_WARNING_OBJECT (dec, "dropping frame because we need a keyframe");
|
|
return GST_CUSTOM_FLOW_DROP;
|
|
}
|
|
dropping_qos:
|
|
{
|
|
GST_WARNING_OBJECT (dec, "dropping frame because of QoS");
|
|
return GST_CUSTOM_FLOW_DROP;
|
|
}
|
|
decode_error:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
|
|
(NULL), ("daala decoder did not decode data packet"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
wrong_dimensions:
|
|
{
|
|
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, FORMAT,
|
|
(NULL), ("dimensions of image do not match header"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
daala_dec_decode_buffer (GstDaalaDec * dec, GstBuffer * buf,
|
|
GstVideoCodecFrame * frame)
|
|
{
|
|
ogg_packet packet;
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
GstMapInfo minfo;
|
|
|
|
/* make ogg_packet out of the buffer */
|
|
gst_buffer_map (buf, &minfo, GST_MAP_READ);
|
|
packet.packet = minfo.data;
|
|
packet.bytes = minfo.size;
|
|
packet.granulepos = -1;
|
|
packet.packetno = 0; /* we don't really care */
|
|
packet.b_o_s = dec->have_header ? 0 : 1;
|
|
/* EOS does not matter for the decoder */
|
|
packet.e_o_s = 0;
|
|
|
|
GST_LOG_OBJECT (dec, "decode buffer of size %ld", packet.bytes);
|
|
|
|
GST_DEBUG_OBJECT (dec, "header=%02x", packet.bytes ? packet.packet[0] : -1);
|
|
|
|
/* switch depending on packet type. A zero byte packet is always a data
|
|
* packet; we don't dereference it in that case. */
|
|
if (packet.bytes && packet.packet[0] & 0x80) {
|
|
if (dec->have_header) {
|
|
GST_WARNING_OBJECT (GST_OBJECT (dec), "Ignoring header");
|
|
GST_VIDEO_CODEC_FRAME_FLAG_SET (frame,
|
|
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
|
|
result = GST_CUSTOM_FLOW_DROP;
|
|
goto done;
|
|
}
|
|
result = daala_handle_header_packet (dec, &packet);
|
|
/* header packets are not meant to be displayed */
|
|
/* FIXME : This is a temporary hack. The proper fix would be to
|
|
* not call _finish_frame() for these types of packets */
|
|
GST_VIDEO_CODEC_FRAME_FLAG_SET (frame,
|
|
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
|
|
} else {
|
|
result = daala_handle_data_packet (dec, &packet, frame);
|
|
}
|
|
|
|
done:
|
|
gst_buffer_unmap (buf, &minfo);
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
daala_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
|
|
{
|
|
GstDaalaDec *dec;
|
|
GstFlowReturn res;
|
|
|
|
dec = GST_DAALA_DEC (bdec);
|
|
|
|
res = daala_dec_decode_buffer (dec, frame->input_buffer, frame);
|
|
switch (res) {
|
|
case GST_FLOW_OK:
|
|
res = gst_video_decoder_finish_frame (bdec, frame);
|
|
break;
|
|
case GST_CUSTOM_FLOW_DROP:
|
|
res = gst_video_decoder_drop_frame (bdec, frame);
|
|
break;
|
|
default:
|
|
gst_video_codec_frame_unref (frame);
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
daala_dec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
|
|
{
|
|
GstBufferPool *pool;
|
|
GstStructure *config;
|
|
|
|
if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
|
|
query))
|
|
return FALSE;
|
|
|
|
g_assert (gst_query_get_n_allocation_pools (query) > 0);
|
|
gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
|
|
g_assert (pool != NULL);
|
|
|
|
config = gst_buffer_pool_get_config (pool);
|
|
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
|
|
gst_buffer_pool_config_add_option (config,
|
|
GST_BUFFER_POOL_OPTION_VIDEO_META);
|
|
}
|
|
gst_buffer_pool_set_config (pool, config);
|
|
gst_object_unref (pool);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
gst_daala_dec_register (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "daaladec",
|
|
GST_RANK_PRIMARY, GST_TYPE_DAALA_DEC);
|
|
}
|