gstreamer/gst/isomp4/gstqtmux.h
Nicolas Dufresne 2359ee29e8 qtmux: Correctly calculate the elst media start
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
2015-06-23 22:34:36 -04:00

298 lines
9.1 KiB
C

/* Quicktime muxer plugin for GStreamer
* Copyright (C) 2008-2010 Thiago Santos <thiagoss@embedded.ufcg.edu.br>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef __GST_QT_MUX_H__
#define __GST_QT_MUX_H__
#include <gst/gst.h>
#include <gst/base/gstcollectpads.h>
#include "fourcc.h"
#include "atoms.h"
#include "atomsrecovery.h"
#include "gstqtmuxmap.h"
G_BEGIN_DECLS
#define GST_TYPE_QT_MUX (gst_qt_mux_get_type())
#define GST_QT_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QT_MUX, GstQTMux))
#define GST_QT_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QT_MUX, GstQTMux))
#define GST_IS_QT_MUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QT_MUX))
#define GST_IS_QT_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QT_MUX))
#define GST_QT_MUX_CAST(obj) ((GstQTMux*)(obj))
typedef struct _GstQTMux GstQTMux;
typedef struct _GstQTMuxClass GstQTMuxClass;
typedef struct _GstQTPad GstQTPad;
/*
* GstQTPadPrepareBufferFunc
*
* Receives a buffer (takes ref) and returns a new buffer that should
* replace the passed one.
*
* Useful for when the pad/datatype needs some manipulation before
* being muxed. (Originally added for image/x-jpc support, for which buffers
* need to be wrapped into a isom box)
*/
typedef GstBuffer * (*GstQTPadPrepareBufferFunc) (GstQTPad * pad,
GstBuffer * buf, GstQTMux * qtmux);
typedef gboolean (*GstQTPadSetCapsFunc) (GstQTPad * pad, GstCaps * caps);
typedef GstBuffer * (*GstQTPadCreateEmptyBufferFunc) (GstQTPad * pad, gint64 duration);
#define QTMUX_NO_OF_TS 10
struct _GstQTPad
{
GstCollectData collect; /* we extend the CollectData */
/* fourcc id of stream */
guint32 fourcc;
/* whether using format that have out of order buffers */
gboolean is_out_of_order;
/* if not 0, track with constant sized samples, e.g. raw audio */
guint sample_size;
/* make sync table entry */
gboolean sync;
/* if it is a sparse stream
* (meaning we can't use PTS differences to compute duration) */
gboolean sparse;
/* bitrates */
guint32 avg_bitrate, max_bitrate;
/* for avg bitrate calculation */
guint64 total_bytes;
guint64 total_duration;
GstBuffer *last_buf;
/* dts of last_buf */
GstClockTime last_dts;
/* This is compensate for CTTS */
GstClockTime dts_adjustment;
/* store the first timestamp for comparing with other streams and
* know if there are late streams */
GstClockTime first_ts;
GstClockTime first_dts;
guint buf_head;
guint buf_tail;
/* all the atom and chunk book-keeping is delegated here
* unowned/uncounted reference, parent MOOV owns */
AtomTRAK *trak;
SampleTableEntry *trak_ste;
/* fragmented support */
/* meta data book-keeping delegated here */
AtomTRAF *traf;
/* fragment buffers */
ATOM_ARRAY (GstBuffer *) fragment_buffers;
/* running fragment duration */
gint64 fragment_duration;
/* optional fragment index book-keeping */
AtomTFRA *tfra;
/* Set when tags are received, cleared when written to moov */
gboolean tags_changed;
GstTagList *tags;
/* if nothing is set, it won't be called */
GstQTPadPrepareBufferFunc prepare_buf_func;
GstQTPadSetCapsFunc set_caps;
GstQTPadCreateEmptyBufferFunc create_empty_buffer;
};
typedef enum _GstQTMuxState
{
GST_QT_MUX_STATE_NONE,
GST_QT_MUX_STATE_STARTED,
GST_QT_MUX_STATE_DATA,
GST_QT_MUX_STATE_EOS
} GstQTMuxState;
typedef enum _GstQtMuxMode {
GST_QT_MUX_MODE_MOOV_AT_END,
GST_QT_MUX_MODE_FRAGMENTED,
GST_QT_MUX_MODE_FRAGMENTED_STREAMABLE,
GST_QT_MUX_MODE_FAST_START,
GST_QT_MUX_MODE_ROBUST_RECORDING
} GstQtMuxMode;
struct _GstQTMux
{
GstElement element;
GstPad *srcpad;
GstCollectPads *collect;
GSList *sinkpads;
/* state */
GstQTMuxState state;
/* Mux mode, inferred from property
* set in gst_qt_mux_start_file() */
GstQtMuxMode mux_mode;
/* size of header (prefix, atoms (ftyp, possibly moov, mdat header)) */
guint64 header_size;
/* accumulated size of raw media data (not including mdat header) */
guint64 mdat_size;
/* position of the moov (for fragmented mode) or reserved moov atom
* area (for robust-muxing mode) */
guint64 moov_pos;
/* position of mdat atom header (for later updating of size) in
* moov-at-end, fragmented and robust-muxing modes */
guint64 mdat_pos;
/* keep track of the largest chunk to fine-tune brands */
GstClockTime longest_chunk;
/* Earliest timestamp across all pads/traks */
GstClockTime first_ts;
/* Last DTS across all pads (= duration) */
GstClockTime last_dts;
/* atom helper objects */
AtomsContext *context;
AtomFTYP *ftyp;
AtomMOOV *moov;
GSList *extra_atoms; /* list of extra top-level atoms (e.g. UUID for xmp)
* Stored as AtomInfo structs */
/* Set when tags are received, cleared when written to moov */
gboolean tags_changed;
/* fragmented file index */
AtomMFRA *mfra;
/* fast start */
FILE *fast_start_file;
/* moov recovery */
FILE *moov_recov_file;
/* fragment sequence */
guint32 fragment_sequence;
/* properties */
guint32 timescale;
guint32 trak_timescale;
AtomsTreeFlavor flavor;
gboolean fast_start;
gboolean guess_pts;
#ifndef GST_REMOVE_DEPRECATED
gint dts_method;
#endif
gchar *fast_start_file_path;
gchar *moov_recov_file_path;
guint32 fragment_duration;
/* Whether or not to work in 'streamable' mode and not
* seek to rewrite headers - only valid for fragmented
* mode. */
gboolean streamable;
/* Requested target maximum duration */
GstClockTime reserved_max_duration;
/* Estimate of remaining reserved header space (in ns of recording) */
GstClockTime reserved_duration_remaining;
/* Multiplier for conversion from reserved_max_duration to bytes */
guint reserved_bytes_per_sec_per_trak;
/* Reserved minimum MOOV size in bytes
* This is converted from reserved_max_duration
* using the bytes/trak/sec estimate */
guint32 reserved_moov_size;
/* Basic size of the moov (static headers + tags) */
guint32 base_moov_size;
/* Size of the most recently generated moov header */
guint32 last_moov_size;
/* True if the first moov in the ping-pong buffers
* is the active one. See gst_qt_mux_robust_recording_rewrite_moov() */
gboolean reserved_moov_first_active;
/* Tracking of periodic MOOV updates */
GstClockTime last_moov_update;
GstClockTime reserved_moov_update_period;
GstClockTime muxed_since_last_update;
/* for request pad naming */
guint video_pads, audio_pads, subtitle_pads;
};
struct _GstQTMuxClass
{
GstElementClass parent_class;
GstQTMuxFormat format;
};
/* type register helper struct */
typedef struct _GstQTMuxClassParams
{
GstQTMuxFormatProp *prop;
GstCaps *src_caps;
GstCaps *video_sink_caps;
GstCaps *audio_sink_caps;
GstCaps *subtitle_sink_caps;
} GstQTMuxClassParams;
#define GST_QT_MUX_PARAMS_QDATA g_quark_from_static_string("qt-mux-params")
GType gst_qt_mux_get_type (void);
gboolean gst_qt_mux_register (GstPlugin * plugin);
/* FIXME: ideally classification tag should be added and
* registered in gstreamer core gsttaglist
*
* this tag is a string in the format: entityfourcc://table_num/content
* FIXME Shouldn't we add a field for 'language'?
*/
#define GST_TAG_3GP_CLASSIFICATION "classification"
G_END_DECLS
#endif /* __GST_QT_MUX_H__ */