/* * 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