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The media start has nothing to do with the shift we have applied but with the value of the first PTS. This is defined as: Dt(0) = 0 Ct(0) = Dt(0) + CTTS(0) So the media start is always the first CTTS. https://bugzilla.gnome.org/show_bug.cgi?id=751361
298 lines
9.1 KiB
C
298 lines
9.1 KiB
C
/* Quicktime muxer plugin for GStreamer
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* Copyright (C) 2008-2010 Thiago Santos <thiagoss@embedded.ufcg.edu.br>
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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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* Unless otherwise indicated, Source Code is licensed under MIT license.
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* See further explanation attached in License Statement (distributed in the file
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* LICENSE).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __GST_QT_MUX_H__
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#define __GST_QT_MUX_H__
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#include <gst/gst.h>
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#include <gst/base/gstcollectpads.h>
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#include "fourcc.h"
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#include "atoms.h"
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#include "atomsrecovery.h"
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#include "gstqtmuxmap.h"
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G_BEGIN_DECLS
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#define GST_TYPE_QT_MUX (gst_qt_mux_get_type())
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#define GST_QT_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QT_MUX, GstQTMux))
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#define GST_QT_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QT_MUX, GstQTMux))
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#define GST_IS_QT_MUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QT_MUX))
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#define GST_IS_QT_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QT_MUX))
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#define GST_QT_MUX_CAST(obj) ((GstQTMux*)(obj))
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typedef struct _GstQTMux GstQTMux;
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typedef struct _GstQTMuxClass GstQTMuxClass;
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typedef struct _GstQTPad GstQTPad;
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/*
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* GstQTPadPrepareBufferFunc
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*
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* Receives a buffer (takes ref) and returns a new buffer that should
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* replace the passed one.
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*
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* Useful for when the pad/datatype needs some manipulation before
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* being muxed. (Originally added for image/x-jpc support, for which buffers
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* need to be wrapped into a isom box)
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*/
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typedef GstBuffer * (*GstQTPadPrepareBufferFunc) (GstQTPad * pad,
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GstBuffer * buf, GstQTMux * qtmux);
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typedef gboolean (*GstQTPadSetCapsFunc) (GstQTPad * pad, GstCaps * caps);
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typedef GstBuffer * (*GstQTPadCreateEmptyBufferFunc) (GstQTPad * pad, gint64 duration);
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#define QTMUX_NO_OF_TS 10
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struct _GstQTPad
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{
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GstCollectData collect; /* we extend the CollectData */
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/* fourcc id of stream */
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guint32 fourcc;
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/* whether using format that have out of order buffers */
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gboolean is_out_of_order;
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/* if not 0, track with constant sized samples, e.g. raw audio */
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guint sample_size;
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/* make sync table entry */
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gboolean sync;
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/* if it is a sparse stream
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* (meaning we can't use PTS differences to compute duration) */
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gboolean sparse;
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/* bitrates */
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guint32 avg_bitrate, max_bitrate;
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/* for avg bitrate calculation */
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guint64 total_bytes;
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guint64 total_duration;
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GstBuffer *last_buf;
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/* dts of last_buf */
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GstClockTime last_dts;
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/* This is compensate for CTTS */
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GstClockTime dts_adjustment;
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/* store the first timestamp for comparing with other streams and
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* know if there are late streams */
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GstClockTime first_ts;
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GstClockTime first_dts;
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guint buf_head;
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guint buf_tail;
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/* all the atom and chunk book-keeping is delegated here
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* unowned/uncounted reference, parent MOOV owns */
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AtomTRAK *trak;
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SampleTableEntry *trak_ste;
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/* fragmented support */
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/* meta data book-keeping delegated here */
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AtomTRAF *traf;
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/* fragment buffers */
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ATOM_ARRAY (GstBuffer *) fragment_buffers;
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/* running fragment duration */
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gint64 fragment_duration;
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/* optional fragment index book-keeping */
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AtomTFRA *tfra;
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/* Set when tags are received, cleared when written to moov */
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gboolean tags_changed;
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GstTagList *tags;
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/* if nothing is set, it won't be called */
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GstQTPadPrepareBufferFunc prepare_buf_func;
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GstQTPadSetCapsFunc set_caps;
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GstQTPadCreateEmptyBufferFunc create_empty_buffer;
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};
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typedef enum _GstQTMuxState
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{
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GST_QT_MUX_STATE_NONE,
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GST_QT_MUX_STATE_STARTED,
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GST_QT_MUX_STATE_DATA,
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GST_QT_MUX_STATE_EOS
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} GstQTMuxState;
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typedef enum _GstQtMuxMode {
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GST_QT_MUX_MODE_MOOV_AT_END,
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GST_QT_MUX_MODE_FRAGMENTED,
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GST_QT_MUX_MODE_FRAGMENTED_STREAMABLE,
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GST_QT_MUX_MODE_FAST_START,
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GST_QT_MUX_MODE_ROBUST_RECORDING
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} GstQtMuxMode;
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struct _GstQTMux
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{
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GstElement element;
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GstPad *srcpad;
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GstCollectPads *collect;
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GSList *sinkpads;
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/* state */
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GstQTMuxState state;
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/* Mux mode, inferred from property
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* set in gst_qt_mux_start_file() */
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GstQtMuxMode mux_mode;
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/* size of header (prefix, atoms (ftyp, possibly moov, mdat header)) */
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guint64 header_size;
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/* accumulated size of raw media data (not including mdat header) */
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guint64 mdat_size;
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/* position of the moov (for fragmented mode) or reserved moov atom
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* area (for robust-muxing mode) */
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guint64 moov_pos;
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/* position of mdat atom header (for later updating of size) in
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* moov-at-end, fragmented and robust-muxing modes */
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guint64 mdat_pos;
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/* keep track of the largest chunk to fine-tune brands */
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GstClockTime longest_chunk;
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/* Earliest timestamp across all pads/traks */
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GstClockTime first_ts;
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/* Last DTS across all pads (= duration) */
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GstClockTime last_dts;
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/* atom helper objects */
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AtomsContext *context;
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AtomFTYP *ftyp;
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AtomMOOV *moov;
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GSList *extra_atoms; /* list of extra top-level atoms (e.g. UUID for xmp)
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* Stored as AtomInfo structs */
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/* Set when tags are received, cleared when written to moov */
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gboolean tags_changed;
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/* fragmented file index */
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AtomMFRA *mfra;
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/* fast start */
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FILE *fast_start_file;
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/* moov recovery */
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FILE *moov_recov_file;
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/* fragment sequence */
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guint32 fragment_sequence;
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/* properties */
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guint32 timescale;
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guint32 trak_timescale;
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AtomsTreeFlavor flavor;
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gboolean fast_start;
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gboolean guess_pts;
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#ifndef GST_REMOVE_DEPRECATED
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gint dts_method;
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#endif
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gchar *fast_start_file_path;
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gchar *moov_recov_file_path;
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guint32 fragment_duration;
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/* Whether or not to work in 'streamable' mode and not
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* seek to rewrite headers - only valid for fragmented
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* mode. */
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gboolean streamable;
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/* Requested target maximum duration */
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GstClockTime reserved_max_duration;
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/* Estimate of remaining reserved header space (in ns of recording) */
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GstClockTime reserved_duration_remaining;
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/* Multiplier for conversion from reserved_max_duration to bytes */
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guint reserved_bytes_per_sec_per_trak;
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/* Reserved minimum MOOV size in bytes
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* This is converted from reserved_max_duration
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* using the bytes/trak/sec estimate */
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guint32 reserved_moov_size;
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/* Basic size of the moov (static headers + tags) */
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guint32 base_moov_size;
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/* Size of the most recently generated moov header */
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guint32 last_moov_size;
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/* True if the first moov in the ping-pong buffers
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* is the active one. See gst_qt_mux_robust_recording_rewrite_moov() */
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gboolean reserved_moov_first_active;
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/* Tracking of periodic MOOV updates */
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GstClockTime last_moov_update;
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GstClockTime reserved_moov_update_period;
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GstClockTime muxed_since_last_update;
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/* for request pad naming */
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guint video_pads, audio_pads, subtitle_pads;
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};
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struct _GstQTMuxClass
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{
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GstElementClass parent_class;
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GstQTMuxFormat format;
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};
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/* type register helper struct */
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typedef struct _GstQTMuxClassParams
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{
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GstQTMuxFormatProp *prop;
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GstCaps *src_caps;
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GstCaps *video_sink_caps;
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GstCaps *audio_sink_caps;
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GstCaps *subtitle_sink_caps;
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} GstQTMuxClassParams;
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#define GST_QT_MUX_PARAMS_QDATA g_quark_from_static_string("qt-mux-params")
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GType gst_qt_mux_get_type (void);
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gboolean gst_qt_mux_register (GstPlugin * plugin);
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/* FIXME: ideally classification tag should be added and
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* registered in gstreamer core gsttaglist
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*
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* this tag is a string in the format: entityfourcc://table_num/content
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* FIXME Shouldn't we add a field for 'language'?
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*/
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#define GST_TAG_3GP_CLASSIFICATION "classification"
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G_END_DECLS
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#endif /* __GST_QT_MUX_H__ */
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