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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
*
* Copyright (c) Sandflow Consulting LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Public header file for the processing of Interoperable Master Format (IMF)
* packages.
*
* @author Pierre-Anthony Lemieux
* @author Valentin Noel
* @file
* @ingroup lavu_imf
*/
#ifndef AVFORMAT_IMF_H
#define AVFORMAT_IMF_H
#include "avformat.h"
#include "libavformat/avio.h"
#include "libavutil/rational.h"
#include <libxml/tree.h>
#define FF_IMF_UUID_FORMAT \
"urn:uuid:%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-" \
"%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
/**
* UUID as defined in IETF RFC 422
*/
typedef uint8_t FFIMFUUID[16];
/**
* IMF Composition Playlist Base Resource
*/
typedef struct FFIMFBaseResource {
AVRational edit_rate; /**< BaseResourceType/EditRate */
uint32_t entry_point; /**< BaseResourceType/EntryPoint */
uint32_t duration; /**< BaseResourceType/Duration */
uint32_t repeat_count; /**< BaseResourceType/RepeatCount */
} FFIMFBaseResource;
/**
* IMF Composition Playlist Track File Resource
*/
typedef struct FFIMFTrackFileResource {
FFIMFBaseResource base;
FFIMFUUID track_file_uuid; /**< TrackFileResourceType/TrackFileId */
} FFIMFTrackFileResource;
/**
* IMF Marker
*/
typedef struct FFIMFMarker {
xmlChar *label_utf8; /**< Marker/Label */
xmlChar *scope_utf8; /**< Marker/Label/\@scope */
uint32_t offset; /**< Marker/Offset */
} FFIMFMarker;
/**
* IMF Composition Playlist Marker Resource
*/
typedef struct FFIMFMarkerResource {
FFIMFBaseResource base;
uint32_t marker_count; /**< Number of Marker elements */
FFIMFMarker *markers; /**< Marker elements */
} FFIMFMarkerResource;
/**
* IMF Composition Playlist Virtual Track
*/
typedef struct FFIMFBaseVirtualTrack {
FFIMFUUID id_uuid; /**< TrackId associated with the Virtual Track */
} FFIMFBaseVirtualTrack;
/**
* IMF Composition Playlist Virtual Track that consists of Track File Resources
*/
typedef struct FFIMFTrackFileVirtualTrack {
FFIMFBaseVirtualTrack base;
uint32_t resource_count; /**< Number of Resource elements present in the Virtual Track */
FFIMFTrackFileResource *resources; /**< Resource elements of the Virtual Track */
unsigned int resources_alloc_sz; /**< Size of the resources buffer */
} FFIMFTrackFileVirtualTrack;
/**
* IMF Composition Playlist Virtual Track that consists of Marker Resources
*/
typedef struct FFIMFMarkerVirtualTrack {
FFIMFBaseVirtualTrack base;
uint32_t resource_count; /**< Number of Resource elements present in the Virtual Track */
FFIMFMarkerResource *resources; /**< Resource elements of the Virtual Track */
} FFIMFMarkerVirtualTrack;
/**
* IMF Composition Playlist
*/
typedef struct FFIMFCPL {
FFIMFUUID id_uuid; /**< CompositionPlaylist/Id element */
xmlChar *content_title_utf8; /**< CompositionPlaylist/ContentTitle element */
AVRational edit_rate; /**< CompositionPlaylist/EditRate element */
FFIMFMarkerVirtualTrack *main_markers_track; /**< Main Marker Virtual Track */
FFIMFTrackFileVirtualTrack *main_image_2d_track; /**< Main Image Virtual Track */
uint32_t main_audio_track_count; /**< Number of Main Audio Virtual Tracks */
FFIMFTrackFileVirtualTrack *main_audio_tracks; /**< Main Audio Virtual Tracks */
} FFIMFCPL;
/**
* Parse an IMF CompositionPlaylist element into the FFIMFCPL data structure.
* @param[in] doc An XML document from which the CPL is read.
* @param[out] cpl Pointer to a memory area (allocated by the client), where the
* function writes a pointer to the newly constructed FFIMFCPL structure (or
* NULL if the CPL could not be parsed). The client is responsible for freeing
* the FFIMFCPL structure using ff_imf_cpl_free().
* @return A non-zero value in case of an error.
*/
int ff_imf_parse_cpl_from_xml_dom(xmlDocPtr doc, FFIMFCPL **cpl);
/**
* Parse an IMF Composition Playlist document into the FFIMFCPL data structure.
* @param[in] in The context from which the CPL is read.
* @param[out] cpl Pointer to a memory area (allocated by the client), where the
* function writes a pointer to the newly constructed FFIMFCPL structure (or
* NULL if the CPL could not be parsed). The client is responsible for freeing
* the FFIMFCPL structure using ff_imf_cpl_free().
* @return A non-zero value in case of an error.
*/
int ff_imf_parse_cpl(AVIOContext *in, FFIMFCPL **cpl);
/**
* Allocates and initializes an FFIMFCPL data structure.
* @return A pointer to the newly constructed FFIMFCPL structure (or NULL if the
* structure could not be constructed). The client is responsible for freeing
* the FFIMFCPL structure using ff_imf_cpl_free().
*/
FFIMFCPL *ff_imf_cpl_alloc(void);
/**
* Deletes an FFIMFCPL data structure previously instantiated with ff_imf_cpl_alloc().
* @param[in] cpl The FFIMFCPL structure to delete.
*/
void ff_imf_cpl_free(FFIMFCPL *cpl);
/**
* Reads an unsigned 32-bit integer from an XML element
* @return 0 on success, < 0 AVERROR code on error.
*/
int ff_imf_xml_read_uint32(xmlNodePtr element, uint32_t *number);
/**
* Reads an AVRational from an XML element
* @return 0 on success, < 0 AVERROR code on error.
*/
int ff_imf_xml_read_rational(xmlNodePtr element, AVRational *rational);
/**
* Reads a UUID from an XML element
* @return 0 on success, < 0 AVERROR code on error.
*/
int ff_imf_xml_read_uuid(xmlNodePtr element, uint8_t uuid[16]);
/**
* Returns the first child element with the specified local name
* @return A pointer to the child element, or NULL if no such child element exists.
*/
xmlNodePtr ff_imf_xml_get_child_element_by_name(xmlNodePtr parent, const char *name_utf8);
#endif
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