mirror of https://git.ffmpeg.org/ffmpeg.git
896 lines
30 KiB
C
896 lines
30 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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*
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* Copyright (c) Sandflow Consulting LLC
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* Demuxes an IMF Composition
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*
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* References
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* OV 2067-0:2018 - SMPTE Overview Document - Interoperable Master Format
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* ST 2067-2:2020 - SMPTE Standard - Interoperable Master Format — Core Constraints
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* ST 2067-3:2020 - SMPTE Standard - Interoperable Master Format — Composition Playlist
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* ST 2067-5:2020 - SMPTE Standard - Interoperable Master Format — Essence Component
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* ST 2067-20:2016 - SMPTE Standard - Interoperable Master Format — Application #2
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* ST 2067-21:2020 - SMPTE Standard - Interoperable Master Format — Application #2 Extended
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* ST 2067-102:2017 - SMPTE Standard - Interoperable Master Format — Common Image Pixel Color Schemes
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* ST 429-9:2007 - SMPTE Standard - D-Cinema Packaging — Asset Mapping and File Segmentation
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*
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* @author Marc-Antoine Arnaud
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* @author Valentin Noel
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* @author Nicholas Vanderzwet
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* @file
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* @ingroup lavu_imf
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*/
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#include "avio_internal.h"
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#include "imf.h"
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#include "internal.h"
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#include "libavutil/avstring.h"
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#include "libavutil/bprint.h"
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#include "libavutil/opt.h"
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#include "mxf.h"
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#include "url.h"
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#include <inttypes.h>
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#include <libxml/parser.h>
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#define AVRATIONAL_FORMAT "%d/%d"
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#define AVRATIONAL_ARG(rational) rational.num, rational.den
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/**
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* IMF Asset locator
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*/
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typedef struct IMFAssetLocator {
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FFIMFUUID uuid;
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char *absolute_uri;
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} IMFAssetLocator;
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/**
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* IMF Asset locator map
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* Results from the parsing of one or more ASSETMAP XML files
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*/
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typedef struct IMFAssetLocatorMap {
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uint32_t asset_count;
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IMFAssetLocator *assets;
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} IMFAssetLocatorMap;
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typedef struct IMFVirtualTrackResourcePlaybackCtx {
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IMFAssetLocator *locator;
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FFIMFTrackFileResource *resource;
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AVFormatContext *ctx;
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} IMFVirtualTrackResourcePlaybackCtx;
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typedef struct IMFVirtualTrackPlaybackCtx {
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int32_t index; /**< Track index in playlist */
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AVRational current_timestamp; /**< Current temporal position */
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AVRational duration; /**< Overall duration */
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uint32_t resource_count; /**< Number of resources */
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unsigned int resources_alloc_sz; /**< Size of the buffer holding the resource */
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IMFVirtualTrackResourcePlaybackCtx *resources; /**< Buffer holding the resources */
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uint32_t current_resource_index; /**< Current resource */
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int64_t last_pts; /**< Last timestamp */
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} IMFVirtualTrackPlaybackCtx;
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typedef struct IMFContext {
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const AVClass *class;
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const char *base_url;
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char *asset_map_paths;
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AVIOInterruptCB *interrupt_callback;
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AVDictionary *avio_opts;
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FFIMFCPL *cpl;
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IMFAssetLocatorMap asset_locator_map;
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uint32_t track_count;
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IMFVirtualTrackPlaybackCtx **tracks;
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} IMFContext;
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static int imf_uri_is_url(const char *string)
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{
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return strstr(string, "://") != NULL;
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}
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static int imf_uri_is_unix_abs_path(const char *string)
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{
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return string[0] == '/';
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}
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static int imf_uri_is_dos_abs_path(const char *string)
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{
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/* Absolute path case: `C:\path\to\somwhere` */
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if (string[1] == ':' && string[2] == '\\')
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return 1;
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/* Absolute path case: `C:/path/to/somwhere` */
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if (string[1] == ':' && string[2] == '/')
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return 1;
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/* Network path case: `\\path\to\somwhere` */
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if (string[0] == '\\' && string[1] == '\\')
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return 1;
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return 0;
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}
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/**
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* Parse a ASSETMAP XML file to extract the UUID-URI mapping of assets.
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* @param s the current format context, if any (can be NULL).
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* @param doc the XML document to be parsed.
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* @param asset_map pointer on the IMFAssetLocatorMap to fill.
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* @param base_url the url of the asset map XML file, if any (can be NULL).
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* @return a negative value in case of error, 0 otherwise.
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*/
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static int parse_imf_asset_map_from_xml_dom(AVFormatContext *s,
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xmlDocPtr doc,
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IMFAssetLocatorMap *asset_map,
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const char *base_url)
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{
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xmlNodePtr asset_map_element = NULL;
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xmlNodePtr node = NULL;
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xmlNodePtr asset_element = NULL;
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unsigned long elem_count;
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char *uri;
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int ret = 0;
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IMFAssetLocator *asset = NULL;
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void *tmp;
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asset_map_element = xmlDocGetRootElement(doc);
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if (!asset_map_element) {
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av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing root node\n");
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return AVERROR_INVALIDDATA;
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}
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if (asset_map_element->type != XML_ELEMENT_NODE || av_strcasecmp(asset_map_element->name, "AssetMap")) {
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av_log(s,
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AV_LOG_ERROR,
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"Unable to parse asset map XML - wrong root node name[%s] type[%d]\n",
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asset_map_element->name,
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(int)asset_map_element->type);
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return AVERROR_INVALIDDATA;
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}
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/* parse asset locators */
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if (!(node = ff_imf_xml_get_child_element_by_name(asset_map_element, "AssetList"))) {
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av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing AssetList node\n");
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return AVERROR_INVALIDDATA;
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}
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elem_count = xmlChildElementCount(node);
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if (elem_count > UINT32_MAX
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|| asset_map->asset_count > UINT32_MAX - elem_count)
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return AVERROR(ENOMEM);
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tmp = av_realloc_array(asset_map->assets,
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elem_count + asset_map->asset_count,
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sizeof(IMFAssetLocator));
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if (!tmp) {
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av_log(s, AV_LOG_ERROR, "Cannot allocate IMF asset locators\n");
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return AVERROR(ENOMEM);
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}
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asset_map->assets = tmp;
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asset_element = xmlFirstElementChild(node);
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while (asset_element) {
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if (av_strcasecmp(asset_element->name, "Asset") != 0)
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continue;
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asset = &(asset_map->assets[asset_map->asset_count]);
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if (ff_imf_xml_read_uuid(ff_imf_xml_get_child_element_by_name(asset_element, "Id"), asset->uuid)) {
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av_log(s, AV_LOG_ERROR, "Could not parse UUID from asset in asset map.\n");
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return AVERROR_INVALIDDATA;
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}
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av_log(s, AV_LOG_DEBUG, "Found asset id: " FF_IMF_UUID_FORMAT "\n", UID_ARG(asset->uuid));
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if (!(node = ff_imf_xml_get_child_element_by_name(asset_element, "ChunkList"))) {
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av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing ChunkList node\n");
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return AVERROR_INVALIDDATA;
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}
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if (!(node = ff_imf_xml_get_child_element_by_name(node, "Chunk"))) {
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av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing Chunk node\n");
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return AVERROR_INVALIDDATA;
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}
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uri = xmlNodeGetContent(ff_imf_xml_get_child_element_by_name(node, "Path"));
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if (!imf_uri_is_url(uri) && !imf_uri_is_unix_abs_path(uri) && !imf_uri_is_dos_abs_path(uri))
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asset->absolute_uri = av_append_path_component(base_url, uri);
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else
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asset->absolute_uri = av_strdup(uri);
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xmlFree(uri);
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if (!asset->absolute_uri)
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return AVERROR(ENOMEM);
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av_log(s, AV_LOG_DEBUG, "Found asset absolute URI: %s\n", asset->absolute_uri);
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asset_map->asset_count++;
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asset_element = xmlNextElementSibling(asset_element);
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}
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return ret;
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}
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/**
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* Initializes an IMFAssetLocatorMap structure.
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*/
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static void imf_asset_locator_map_init(IMFAssetLocatorMap *asset_map)
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{
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asset_map->assets = NULL;
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asset_map->asset_count = 0;
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}
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/**
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* Free a IMFAssetLocatorMap pointer.
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*/
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static void imf_asset_locator_map_deinit(IMFAssetLocatorMap *asset_map)
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{
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for (uint32_t i = 0; i < asset_map->asset_count; i++)
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av_freep(&asset_map->assets[i].absolute_uri);
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av_freep(&asset_map->assets);
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}
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static int parse_assetmap(AVFormatContext *s, const char *url)
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{
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IMFContext *c = s->priv_data;
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AVIOContext *in = NULL;
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struct AVBPrint buf;
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AVDictionary *opts = NULL;
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xmlDoc *doc = NULL;
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const char *base_url;
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char *tmp_str = NULL;
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int ret;
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av_log(s, AV_LOG_DEBUG, "Asset Map URL: %s\n", url);
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av_dict_copy(&opts, c->avio_opts, 0);
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ret = s->io_open(s, &in, url, AVIO_FLAG_READ, &opts);
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av_dict_free(&opts);
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if (ret < 0)
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return ret;
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av_bprint_init(&buf, 0, INT_MAX); // xmlReadMemory uses integer length
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ret = avio_read_to_bprint(in, &buf, SIZE_MAX);
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if (ret < 0 || !avio_feof(in)) {
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av_log(s, AV_LOG_ERROR, "Unable to read to asset map '%s'\n", url);
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if (ret == 0)
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ret = AVERROR_INVALIDDATA;
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goto clean_up;
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}
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LIBXML_TEST_VERSION
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tmp_str = av_strdup(url);
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if (!tmp_str) {
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ret = AVERROR(ENOMEM);
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goto clean_up;
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}
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base_url = av_dirname(tmp_str);
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doc = xmlReadMemory(buf.str, buf.len, url, NULL, 0);
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ret = parse_imf_asset_map_from_xml_dom(s, doc, &c->asset_locator_map, base_url);
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if (!ret)
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av_log(s,
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AV_LOG_DEBUG,
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"Found %d assets from %s\n",
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c->asset_locator_map.asset_count,
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url);
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xmlFreeDoc(doc);
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clean_up:
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if (tmp_str)
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av_freep(&tmp_str);
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ff_format_io_close(s, &in);
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av_bprint_finalize(&buf, NULL);
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return ret;
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}
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static IMFAssetLocator *find_asset_map_locator(IMFAssetLocatorMap *asset_map, FFIMFUUID uuid)
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{
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for (uint32_t i = 0; i < asset_map->asset_count; i++) {
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if (memcmp(asset_map->assets[i].uuid, uuid, 16) == 0)
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return &(asset_map->assets[i]);
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}
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return NULL;
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}
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static int open_track_resource_context(AVFormatContext *s,
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IMFVirtualTrackResourcePlaybackCtx *track_resource)
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{
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IMFContext *c = s->priv_data;
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int ret = 0;
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int64_t entry_point;
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AVDictionary *opts = NULL;
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if (track_resource->ctx) {
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av_log(s,
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AV_LOG_DEBUG,
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"Input context already opened for %s.\n",
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track_resource->locator->absolute_uri);
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return 0;
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}
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track_resource->ctx = avformat_alloc_context();
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if (!track_resource->ctx)
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return AVERROR(ENOMEM);
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track_resource->ctx->io_open = s->io_open;
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track_resource->ctx->io_close = s->io_close;
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track_resource->ctx->io_close2 = s->io_close2;
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track_resource->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
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if ((ret = ff_copy_whiteblacklists(track_resource->ctx, s)) < 0)
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goto cleanup;
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if ((ret = av_opt_set(track_resource->ctx, "format_whitelist", "mxf", 0)))
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goto cleanup;
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if ((ret = av_dict_copy(&opts, c->avio_opts, 0)) < 0)
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goto cleanup;
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ret = avformat_open_input(&track_resource->ctx,
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track_resource->locator->absolute_uri,
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NULL,
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&opts);
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if (ret < 0) {
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av_log(s,
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AV_LOG_ERROR,
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"Could not open %s input context: %s\n",
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track_resource->locator->absolute_uri,
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av_err2str(ret));
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goto cleanup;
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}
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av_dict_free(&opts);
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/* Compare the source timebase to the resource edit rate,
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* considering the first stream of the source file
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*/
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if (av_cmp_q(track_resource->ctx->streams[0]->time_base,
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av_inv_q(track_resource->resource->base.edit_rate)))
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av_log(s,
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AV_LOG_WARNING,
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"Incoherent source stream timebase %d/%d regarding resource edit rate: %d/%d",
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track_resource->ctx->streams[0]->time_base.num,
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track_resource->ctx->streams[0]->time_base.den,
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track_resource->resource->base.edit_rate.den,
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track_resource->resource->base.edit_rate.num);
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entry_point = (int64_t)track_resource->resource->base.entry_point
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* track_resource->resource->base.edit_rate.den
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* AV_TIME_BASE
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/ track_resource->resource->base.edit_rate.num;
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if (entry_point) {
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av_log(s,
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AV_LOG_DEBUG,
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"Seek at resource %s entry point: %" PRIu32 "\n",
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track_resource->locator->absolute_uri,
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track_resource->resource->base.entry_point);
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ret = avformat_seek_file(track_resource->ctx, -1, entry_point, entry_point, entry_point, 0);
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if (ret < 0) {
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av_log(s,
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AV_LOG_ERROR,
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"Could not seek at %" PRId64 "on %s: %s\n",
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entry_point,
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track_resource->locator->absolute_uri,
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av_err2str(ret));
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avformat_close_input(&track_resource->ctx);
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return ret;
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}
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}
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return 0;
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cleanup:
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av_dict_free(&opts);
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avformat_free_context(track_resource->ctx);
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track_resource->ctx = NULL;
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return ret;
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}
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static int open_track_file_resource(AVFormatContext *s,
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FFIMFTrackFileResource *track_file_resource,
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IMFVirtualTrackPlaybackCtx *track)
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{
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IMFContext *c = s->priv_data;
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IMFAssetLocator *asset_locator;
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void *tmp;
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int ret;
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asset_locator = find_asset_map_locator(&c->asset_locator_map, track_file_resource->track_file_uuid);
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if (!asset_locator) {
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av_log(s,
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AV_LOG_ERROR,
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"Could not find asset locator for UUID: " FF_IMF_UUID_FORMAT "\n",
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UID_ARG(track_file_resource->track_file_uuid));
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return AVERROR_INVALIDDATA;
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}
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av_log(s,
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AV_LOG_DEBUG,
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"Found locator for " FF_IMF_UUID_FORMAT ": %s\n",
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UID_ARG(asset_locator->uuid),
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asset_locator->absolute_uri);
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if (track->resource_count > UINT32_MAX - track_file_resource->base.repeat_count
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|| (track->resource_count + track_file_resource->base.repeat_count)
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> INT_MAX / sizeof(IMFVirtualTrackResourcePlaybackCtx))
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return AVERROR(ENOMEM);
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tmp = av_fast_realloc(track->resources,
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&track->resources_alloc_sz,
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(track->resource_count + track_file_resource->base.repeat_count)
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* sizeof(IMFVirtualTrackResourcePlaybackCtx));
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if (!tmp)
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return AVERROR(ENOMEM);
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track->resources = tmp;
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for (uint32_t i = 0; i < track_file_resource->base.repeat_count; i++) {
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IMFVirtualTrackResourcePlaybackCtx vt_ctx;
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vt_ctx.locator = asset_locator;
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vt_ctx.resource = track_file_resource;
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vt_ctx.ctx = NULL;
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if ((ret = open_track_resource_context(s, &vt_ctx)) != 0)
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return ret;
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track->resources[track->resource_count++] = vt_ctx;
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track->duration = av_add_q(track->duration,
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av_make_q((int)track_file_resource->base.duration
|
|
* track_file_resource->base.edit_rate.den,
|
|
track_file_resource->base.edit_rate.num));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void imf_virtual_track_playback_context_deinit(IMFVirtualTrackPlaybackCtx *track)
|
|
{
|
|
for (uint32_t i = 0; i < track->resource_count; i++)
|
|
avformat_close_input(&track->resources[i].ctx);
|
|
|
|
av_freep(&track->resources);
|
|
}
|
|
|
|
static int open_virtual_track(AVFormatContext *s,
|
|
FFIMFTrackFileVirtualTrack *virtual_track,
|
|
int32_t track_index)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
IMFVirtualTrackPlaybackCtx *track = NULL;
|
|
void *tmp;
|
|
int ret = 0;
|
|
|
|
if (!(track = av_mallocz(sizeof(IMFVirtualTrackPlaybackCtx))))
|
|
return AVERROR(ENOMEM);
|
|
track->index = track_index;
|
|
track->duration = av_make_q(0, 1);
|
|
|
|
for (uint32_t i = 0; i < virtual_track->resource_count; i++) {
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Open stream from file " FF_IMF_UUID_FORMAT ", stream %d\n",
|
|
UID_ARG(virtual_track->resources[i].track_file_uuid),
|
|
i);
|
|
if ((ret = open_track_file_resource(s, &virtual_track->resources[i], track)) != 0) {
|
|
av_log(s,
|
|
AV_LOG_ERROR,
|
|
"Could not open image track resource " FF_IMF_UUID_FORMAT "\n",
|
|
UID_ARG(virtual_track->resources[i].track_file_uuid));
|
|
goto clean_up;
|
|
}
|
|
}
|
|
|
|
track->current_timestamp = av_make_q(0, track->duration.den);
|
|
|
|
if (c->track_count == UINT32_MAX) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto clean_up;
|
|
}
|
|
tmp = av_realloc_array(c->tracks, c->track_count + 1, sizeof(IMFVirtualTrackPlaybackCtx *));
|
|
if (!tmp) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto clean_up;
|
|
}
|
|
c->tracks = tmp;
|
|
c->tracks[c->track_count++] = track;
|
|
|
|
return 0;
|
|
|
|
clean_up:
|
|
imf_virtual_track_playback_context_deinit(track);
|
|
av_free(track);
|
|
return ret;
|
|
}
|
|
|
|
static int set_context_streams_from_tracks(AVFormatContext *s)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
int ret = 0;
|
|
|
|
for (uint32_t i = 0; i < c->track_count; i++) {
|
|
AVStream *asset_stream;
|
|
AVStream *first_resource_stream;
|
|
|
|
/* Open the first resource of the track to get stream information */
|
|
first_resource_stream = c->tracks[i]->resources[0].ctx->streams[0];
|
|
av_log(s, AV_LOG_DEBUG, "Open the first resource of track %d\n", c->tracks[i]->index);
|
|
|
|
/* Copy stream information */
|
|
asset_stream = avformat_new_stream(s, NULL);
|
|
if (!asset_stream) {
|
|
av_log(s, AV_LOG_ERROR, "Could not create stream\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
asset_stream->id = i;
|
|
ret = avcodec_parameters_copy(asset_stream->codecpar, first_resource_stream->codecpar);
|
|
if (ret < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Could not copy stream parameters\n");
|
|
return ret;
|
|
}
|
|
avpriv_set_pts_info(asset_stream,
|
|
first_resource_stream->pts_wrap_bits,
|
|
first_resource_stream->time_base.num,
|
|
first_resource_stream->time_base.den);
|
|
asset_stream->duration = (int64_t)av_q2d(av_mul_q(c->tracks[i]->duration,
|
|
av_inv_q(asset_stream->time_base)));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int open_cpl_tracks(AVFormatContext *s)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
int32_t track_index = 0;
|
|
int ret;
|
|
|
|
if (c->cpl->main_image_2d_track) {
|
|
if ((ret = open_virtual_track(s, c->cpl->main_image_2d_track, track_index++)) != 0) {
|
|
av_log(s,
|
|
AV_LOG_ERROR,
|
|
"Could not open image track " FF_IMF_UUID_FORMAT "\n",
|
|
UID_ARG(c->cpl->main_image_2d_track->base.id_uuid));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
for (uint32_t i = 0; i < c->cpl->main_audio_track_count; i++) {
|
|
if ((ret = open_virtual_track(s, &c->cpl->main_audio_tracks[i], track_index++)) != 0) {
|
|
av_log(s,
|
|
AV_LOG_ERROR,
|
|
"Could not open audio track " FF_IMF_UUID_FORMAT "\n",
|
|
UID_ARG(c->cpl->main_audio_tracks[i].base.id_uuid));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return set_context_streams_from_tracks(s);
|
|
}
|
|
|
|
static int imf_read_header(AVFormatContext *s)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
char *asset_map_path;
|
|
char *tmp_str;
|
|
int ret = 0;
|
|
|
|
c->interrupt_callback = &s->interrupt_callback;
|
|
tmp_str = av_strdup(s->url);
|
|
if (!tmp_str)
|
|
return AVERROR(ENOMEM);
|
|
c->base_url = av_strdup(av_dirname(tmp_str));
|
|
av_freep(&tmp_str);
|
|
if (!c->base_url)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
|
|
return ret;
|
|
|
|
av_log(s, AV_LOG_DEBUG, "start parsing IMF CPL: %s\n", s->url);
|
|
|
|
if ((ret = ff_imf_parse_cpl(s->pb, &c->cpl)) < 0)
|
|
return ret;
|
|
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"parsed IMF CPL: " FF_IMF_UUID_FORMAT "\n",
|
|
UID_ARG(c->cpl->id_uuid));
|
|
|
|
if (!c->asset_map_paths) {
|
|
c->asset_map_paths = av_append_path_component(c->base_url, "ASSETMAP.xml");
|
|
if (!c->asset_map_paths) {
|
|
ret = AVERROR(ENOMEM);
|
|
return ret;
|
|
}
|
|
av_log(s, AV_LOG_DEBUG, "No asset maps provided, using the default ASSETMAP.xml\n");
|
|
}
|
|
|
|
/* Parse each asset map XML file */
|
|
imf_asset_locator_map_init(&c->asset_locator_map);
|
|
asset_map_path = av_strtok(c->asset_map_paths, ",", &tmp_str);
|
|
while (asset_map_path != NULL) {
|
|
av_log(s, AV_LOG_DEBUG, "start parsing IMF Asset Map: %s\n", asset_map_path);
|
|
|
|
if ((ret = parse_assetmap(s, asset_map_path)))
|
|
return ret;
|
|
|
|
asset_map_path = av_strtok(NULL, ",", &tmp_str);
|
|
}
|
|
|
|
av_log(s, AV_LOG_DEBUG, "parsed IMF Asset Maps\n");
|
|
|
|
if ((ret = open_cpl_tracks(s)))
|
|
return ret;
|
|
|
|
av_log(s, AV_LOG_DEBUG, "parsed IMF package\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static IMFVirtualTrackPlaybackCtx *get_next_track_with_minimum_timestamp(AVFormatContext *s)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
IMFVirtualTrackPlaybackCtx *track;
|
|
|
|
AVRational minimum_timestamp = av_make_q(INT32_MAX, 1);
|
|
for (uint32_t i = c->track_count; i > 0; i--) {
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Compare track %d timestamp " AVRATIONAL_FORMAT
|
|
" to minimum " AVRATIONAL_FORMAT
|
|
" (over duration: " AVRATIONAL_FORMAT
|
|
")\n",
|
|
i,
|
|
AVRATIONAL_ARG(c->tracks[i - 1]->current_timestamp),
|
|
AVRATIONAL_ARG(minimum_timestamp),
|
|
AVRATIONAL_ARG(c->tracks[i - 1]->duration));
|
|
|
|
if (av_cmp_q(c->tracks[i - 1]->current_timestamp, minimum_timestamp) <= 0) {
|
|
track = c->tracks[i - 1];
|
|
minimum_timestamp = track->current_timestamp;
|
|
}
|
|
}
|
|
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Found next track to read: %d (timestamp: %lf / %lf)\n",
|
|
track->index,
|
|
av_q2d(track->current_timestamp),
|
|
av_q2d(minimum_timestamp));
|
|
return track;
|
|
}
|
|
|
|
static IMFVirtualTrackResourcePlaybackCtx *get_resource_context_for_timestamp(AVFormatContext *s,
|
|
IMFVirtualTrackPlaybackCtx *track)
|
|
{
|
|
AVRational edit_unit_duration = av_inv_q(track->resources[0].resource->base.edit_rate);
|
|
AVRational cumulated_duration = av_make_q(0, edit_unit_duration.den);
|
|
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Looking for track %d resource for timestamp = %lf / %lf\n",
|
|
track->index,
|
|
av_q2d(track->current_timestamp),
|
|
av_q2d(track->duration));
|
|
for (uint32_t i = 0; i < track->resource_count; i++) {
|
|
cumulated_duration = av_add_q(cumulated_duration,
|
|
av_make_q((int)track->resources[i].resource->base.duration
|
|
* edit_unit_duration.num,
|
|
edit_unit_duration.den));
|
|
|
|
if (av_cmp_q(av_add_q(track->current_timestamp, edit_unit_duration), cumulated_duration) <= 0) {
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Found resource %d in track %d to read for timestamp %lf "
|
|
"(on cumulated=%lf): entry=%" PRIu32
|
|
", duration=%" PRIu32
|
|
", editrate=" AVRATIONAL_FORMAT
|
|
" | edit_unit_duration=%lf\n",
|
|
i,
|
|
track->index,
|
|
av_q2d(track->current_timestamp),
|
|
av_q2d(cumulated_duration),
|
|
track->resources[i].resource->base.entry_point,
|
|
track->resources[i].resource->base.duration,
|
|
AVRATIONAL_ARG(track->resources[i].resource->base.edit_rate),
|
|
av_q2d(edit_unit_duration));
|
|
|
|
if (track->current_resource_index != i) {
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Switch resource on track %d: re-open context\n",
|
|
track->index);
|
|
if (open_track_resource_context(s, &(track->resources[i])) != 0)
|
|
return NULL;
|
|
avformat_close_input(&(track->resources[track->current_resource_index].ctx));
|
|
track->current_resource_index = i;
|
|
}
|
|
|
|
return &(track->resources[track->current_resource_index]);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int imf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
IMFVirtualTrackResourcePlaybackCtx *resource_to_read = NULL;
|
|
AVRational edit_unit_duration;
|
|
int ret = 0;
|
|
IMFVirtualTrackPlaybackCtx *track;
|
|
FFStream *track_stream;
|
|
|
|
track = get_next_track_with_minimum_timestamp(s);
|
|
|
|
if (av_cmp_q(track->current_timestamp, track->duration) == 0)
|
|
return AVERROR_EOF;
|
|
|
|
resource_to_read = get_resource_context_for_timestamp(s, track);
|
|
|
|
if (!resource_to_read) {
|
|
edit_unit_duration
|
|
= av_inv_q(track->resources[track->current_resource_index].resource->base.edit_rate);
|
|
|
|
if (av_cmp_q(av_add_q(track->current_timestamp, edit_unit_duration), track->duration) > 0)
|
|
return AVERROR_EOF;
|
|
|
|
av_log(s, AV_LOG_ERROR, "Could not find IMF track resource to read\n");
|
|
return AVERROR_STREAM_NOT_FOUND;
|
|
}
|
|
|
|
while (!ff_check_interrupt(c->interrupt_callback) && !ret) {
|
|
ret = av_read_frame(resource_to_read->ctx, pkt);
|
|
av_log(s,
|
|
AV_LOG_DEBUG,
|
|
"Got packet: pts=%" PRId64
|
|
", dts=%" PRId64
|
|
", duration=%" PRId64
|
|
", stream_index=%d, pos=%" PRId64
|
|
"\n",
|
|
pkt->pts,
|
|
pkt->dts,
|
|
pkt->duration,
|
|
pkt->stream_index,
|
|
pkt->pos);
|
|
|
|
track_stream = ffstream(s->streams[track->index]);
|
|
if (ret >= 0) {
|
|
/* Update packet info from track */
|
|
if (pkt->dts < track_stream->cur_dts && track->last_pts > 0)
|
|
pkt->dts = track_stream->cur_dts;
|
|
|
|
pkt->pts = track->last_pts;
|
|
pkt->dts = pkt->dts
|
|
- (int64_t)track->resources[track->current_resource_index].resource->base.entry_point;
|
|
pkt->stream_index = track->index;
|
|
|
|
/* Update track cursors */
|
|
track->current_timestamp
|
|
= av_add_q(track->current_timestamp,
|
|
av_make_q((int)pkt->duration
|
|
* resource_to_read->ctx->streams[0]->time_base.num,
|
|
resource_to_read->ctx->streams[0]->time_base.den));
|
|
track->last_pts += pkt->duration;
|
|
|
|
return 0;
|
|
} else if (ret != AVERROR_EOF) {
|
|
av_log(s,
|
|
AV_LOG_ERROR,
|
|
"Could not get packet from track %d: %s\n",
|
|
track->index,
|
|
av_err2str(ret));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
static int imf_close(AVFormatContext *s)
|
|
{
|
|
IMFContext *c = s->priv_data;
|
|
|
|
av_log(s, AV_LOG_DEBUG, "Close IMF package\n");
|
|
av_dict_free(&c->avio_opts);
|
|
av_freep(&c->base_url);
|
|
imf_asset_locator_map_deinit(&c->asset_locator_map);
|
|
ff_imf_cpl_free(c->cpl);
|
|
|
|
for (uint32_t i = 0; i < c->track_count; i++) {
|
|
imf_virtual_track_playback_context_deinit(c->tracks[i]);
|
|
av_freep(&c->tracks[i]);
|
|
}
|
|
|
|
av_freep(&c->tracks);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imf_probe(const AVProbeData *p)
|
|
{
|
|
if (!strstr(p->buf, "<CompositionPlaylist"))
|
|
return 0;
|
|
|
|
/* check for a ContentTitle element without including ContentTitleText,
|
|
* which is used by the D-Cinema CPL.
|
|
*/
|
|
if (!strstr(p->buf, "ContentTitle>"))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static const AVOption imf_options[] = {
|
|
{
|
|
.name = "assetmaps",
|
|
.help = "Comma-separated paths to ASSETMAP files."
|
|
"If not specified, the `ASSETMAP.xml` file in the same "
|
|
"directory as the CPL is used.",
|
|
.offset = offsetof(IMFContext, asset_map_paths),
|
|
.type = AV_OPT_TYPE_STRING,
|
|
.default_val = {.str = NULL},
|
|
.flags = AV_OPT_FLAG_DECODING_PARAM,
|
|
},
|
|
{NULL},
|
|
};
|
|
|
|
static const AVClass imf_class = {
|
|
.class_name = "imf",
|
|
.item_name = av_default_item_name,
|
|
.option = imf_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const AVInputFormat ff_imf_demuxer = {
|
|
.name = "imf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("IMF (Interoperable Master Format)"),
|
|
.flags = AVFMT_EXPERIMENTAL,
|
|
.flags_internal = FF_FMT_INIT_CLEANUP,
|
|
.priv_class = &imf_class,
|
|
.priv_data_size = sizeof(IMFContext),
|
|
.read_probe = imf_probe,
|
|
.read_header = imf_read_header,
|
|
.read_packet = imf_read_packet,
|
|
.read_close = imf_close,
|
|
};
|