@@ -433,6 +433,7 @@ Muxers/Demuxers:
idroqdec.c Mike Melanson
iff.c Jaikrishnan Menon
img2*.c Michael Niedermayer
+ imf*.c Marc-Antoine Arnaud, Pierre-Anthony Lemieux, Valentin Noël
ipmovie.c Mike Melanson
ircam* Paul B Mahol
iss.c Stefan Gehrer
@@ -298,7 +298,7 @@ External library support:
--enable-libxvid enable Xvid encoding via xvidcore,
native MPEG-4/Xvid encoder exists [no]
--enable-libxml2 enable XML parsing using the C library libxml2, needed
- for dash demuxing support [no]
+ for dash and imf demuxing support [no]
--enable-libzimg enable z.lib, needed for zscale filter [no]
--enable-libzmq enable message passing via libzmq [no]
--enable-libzvbi enable teletext support via libzvbi [no]
@@ -3400,6 +3400,7 @@ hls_muxer_select="mpegts_muxer"
hls_muxer_suggest="gcrypt openssl"
image2_alias_pix_demuxer_select="image2_demuxer"
image2_brender_pix_demuxer_select="image2_demuxer"
+imf_demuxer_deps="libxml2"
ipod_muxer_select="mov_muxer"
ismv_muxer_select="mov_muxer"
ivf_muxer_select="av1_metadata_bsf vp9_superframe_bsf"
@@ -267,6 +267,12 @@ which streams to actually receive.
Each stream mirrors the @code{id} and @code{bandwidth} properties from the
@code{<Representation>} as metadata keys named "id" and "variant_bitrate" respectively.
+@section imf
+
+Interoperable Master Format demuxer.
+
+This demuxer presents audio and video streams found in an IMF Composition.
+
@section flv, live_flv, kux
Adobe Flash Video Format demuxer.
@@ -285,6 +285,7 @@ OBJS-$(CONFIG_IMAGE_WEBP_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_XBM_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_XPM_PIPE_DEMUXER) += img2dec.o img2.o
OBJS-$(CONFIG_IMAGE_XWD_PIPE_DEMUXER) += img2dec.o img2.o
+OBJS-$(CONFIG_IMF_DEMUXER) += imfdec.o imf_cpl.o
OBJS-$(CONFIG_INGENIENT_DEMUXER) += ingenientdec.o rawdec.o
OBJS-$(CONFIG_IPMOVIE_DEMUXER) += ipmovie.o
OBJS-$(CONFIG_IPU_DEMUXER) += ipudec.o rawdec.o
@@ -212,6 +212,7 @@ extern const AVInputFormat ff_image2pipe_demuxer;
extern const AVOutputFormat ff_image2pipe_muxer;
extern const AVInputFormat ff_image2_alias_pix_demuxer;
extern const AVInputFormat ff_image2_brender_pix_demuxer;
+extern const AVInputFormat ff_imf_demuxer;
extern const AVInputFormat ff_ingenient_demuxer;
extern const AVInputFormat ff_ipmovie_demuxer;
extern const AVOutputFormat ff_ipod_muxer;
new file mode 100644
@@ -0,0 +1,207 @@
+/*
+ * 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 */
+ uint32_t 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
new file mode 100644
@@ -0,0 +1,783 @@
+/*
+ * 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.
+ */
+
+/**
+ * Implements IMP CPL processing
+ *
+ * @author Pierre-Anthony Lemieux
+ * @file
+ * @ingroup lavu_imf
+ */
+
+#include "imf.h"
+#include "libavformat/mxf.h"
+#include "libavutil/bprint.h"
+#include "libavutil/error.h"
+#include <libxml/parser.h>
+
+xmlNodePtr ff_imf_xml_get_child_element_by_name(xmlNodePtr parent, const char *name_utf8)
+{
+ xmlNodePtr cur_element;
+
+ cur_element = xmlFirstElementChild(parent);
+ while (cur_element) {
+ if (xmlStrcmp(cur_element->name, name_utf8) == 0)
+ return cur_element;
+ cur_element = xmlNextElementSibling(cur_element);
+ }
+ return NULL;
+}
+
+int ff_imf_xml_read_uuid(xmlNodePtr element, uint8_t uuid[16])
+{
+ xmlChar *element_text = NULL;
+ int scanf_ret;
+ int ret = 0;
+
+ element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
+ scanf_ret = sscanf(element_text,
+ FF_IMF_UUID_FORMAT,
+ &uuid[0],
+ &uuid[1],
+ &uuid[2],
+ &uuid[3],
+ &uuid[4],
+ &uuid[5],
+ &uuid[6],
+ &uuid[7],
+ &uuid[8],
+ &uuid[9],
+ &uuid[10],
+ &uuid[11],
+ &uuid[12],
+ &uuid[13],
+ &uuid[14],
+ &uuid[15]);
+ if (scanf_ret != 16) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid UUID\n");
+ ret = AVERROR_INVALIDDATA;
+ }
+ xmlFree(element_text);
+
+ return ret;
+}
+
+int ff_imf_xml_read_rational(xmlNodePtr element, AVRational *rational)
+{
+ xmlChar *element_text = NULL;
+ int ret = 0;
+
+ element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
+ if (sscanf(element_text, "%i %i", &rational->num, &rational->den) != 2) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid rational number\n");
+ ret = AVERROR_INVALIDDATA;
+ }
+ xmlFree(element_text);
+
+ return ret;
+}
+
+int ff_imf_xml_read_uint32(xmlNodePtr element, uint32_t *number)
+{
+ xmlChar *element_text = NULL;
+ int ret = 0;
+
+ element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
+ if (sscanf(element_text, "%" PRIu32, number) != 1) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid unsigned 32-bit integer");
+ ret = AVERROR_INVALIDDATA;
+ }
+ xmlFree(element_text);
+
+ return ret;
+}
+
+static void imf_base_virtual_track_init(FFIMFBaseVirtualTrack *track)
+{
+ memset(track->id_uuid, 0, sizeof(track->id_uuid));
+}
+
+static void imf_marker_virtual_track_init(FFIMFMarkerVirtualTrack *track)
+{
+ imf_base_virtual_track_init((FFIMFBaseVirtualTrack *)track);
+ track->resource_count = 0;
+ track->resources = NULL;
+}
+
+static void imf_trackfile_virtual_track_init(FFIMFTrackFileVirtualTrack *track)
+{
+ imf_base_virtual_track_init((FFIMFBaseVirtualTrack *)track);
+ track->resource_count = 0;
+ track->resources_alloc_sz = 0;
+ track->resources = NULL;
+}
+
+static void imf_base_resource_init(FFIMFBaseResource *rsrc)
+{
+ rsrc->duration = 0;
+ rsrc->edit_rate = av_make_q(0, 1);
+ rsrc->entry_point = 0;
+ rsrc->repeat_count = 1;
+}
+
+static void imf_marker_resource_init(FFIMFMarkerResource *rsrc)
+{
+ imf_base_resource_init((FFIMFBaseResource *)rsrc);
+ rsrc->marker_count = 0;
+ rsrc->markers = NULL;
+}
+
+static void imf_marker_init(FFIMFMarker *marker)
+{
+ marker->label_utf8 = NULL;
+ marker->offset = 0;
+ marker->scope_utf8 = NULL;
+}
+
+static void imf_trackfile_resource_init(FFIMFTrackFileResource *rsrc)
+{
+ imf_base_resource_init((FFIMFBaseResource *)rsrc);
+ memset(rsrc->track_file_uuid, 0, sizeof(rsrc->track_file_uuid));
+}
+
+static int fill_content_title(xmlNodePtr cpl_element, FFIMFCPL *cpl)
+{
+ xmlNodePtr element = NULL;
+
+ if (!(element = ff_imf_xml_get_child_element_by_name(cpl_element, "ContentTitle"))) {
+ av_log(NULL, AV_LOG_ERROR, "ContentTitle element not found in the IMF CPL\n");
+ return AVERROR_INVALIDDATA;
+ }
+ cpl->content_title_utf8 = xmlNodeListGetString(cpl_element->doc,
+ element->xmlChildrenNode,
+ 1);
+
+ return 0;
+}
+
+static int fill_edit_rate(xmlNodePtr cpl_element, FFIMFCPL *cpl)
+{
+ xmlNodePtr element = NULL;
+
+ if (!(element = ff_imf_xml_get_child_element_by_name(cpl_element, "EditRate"))) {
+ av_log(NULL, AV_LOG_ERROR, "EditRate element not found in the IMF CPL\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ return ff_imf_xml_read_rational(element, &cpl->edit_rate);
+}
+
+static int fill_id(xmlNodePtr cpl_element, FFIMFCPL *cpl)
+{
+ xmlNodePtr element = NULL;
+
+ if (!(element = ff_imf_xml_get_child_element_by_name(cpl_element, "Id"))) {
+ av_log(NULL, AV_LOG_ERROR, "Id element not found in the IMF CPL\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ return ff_imf_xml_read_uuid(element, cpl->id_uuid);
+}
+
+static int fill_marker(xmlNodePtr marker_elem, FFIMFMarker *marker)
+{
+ xmlNodePtr element = NULL;
+ int ret = 0;
+
+ /* read Offset */
+ if (!(element = ff_imf_xml_get_child_element_by_name(marker_elem, "Offset"))) {
+ av_log(NULL, AV_LOG_ERROR, "Offset element not found in a Marker\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if ((ret = ff_imf_xml_read_uint32(element, &marker->offset)))
+ return ret;
+
+ /* read Label and Scope */
+ if (!(element = ff_imf_xml_get_child_element_by_name(marker_elem, "Label"))) {
+ av_log(NULL, AV_LOG_ERROR, "Label element not found in a Marker\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (!(marker->label_utf8 = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1))) {
+ av_log(NULL, AV_LOG_ERROR, "Empty Label element found in a Marker\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (!(marker->scope_utf8 = xmlGetNoNsProp(element, "scope"))) {
+ marker->scope_utf8 = xmlCharStrdup("http://www.smpte-ra.org/schemas/2067-3/2013#standard-markers");
+ if (!marker->scope_utf8) {
+ xmlFree(marker->label_utf8);
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ return ret;
+}
+
+static int fill_base_resource(xmlNodePtr resource_elem, FFIMFBaseResource *resource, FFIMFCPL *cpl)
+{
+ xmlNodePtr element = NULL;
+ int ret = 0;
+
+ /* read EditRate */
+ if (!(element = ff_imf_xml_get_child_element_by_name(resource_elem, "EditRate"))) {
+ resource->edit_rate = cpl->edit_rate;
+ } else if (ret = ff_imf_xml_read_rational(element, &resource->edit_rate)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid EditRate element found in a Resource\n");
+ return ret;
+ }
+
+ /* read EntryPoint */
+ if (element = ff_imf_xml_get_child_element_by_name(resource_elem, "EntryPoint")) {
+ if (ret = ff_imf_xml_read_uint32(element, &resource->entry_point)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid EntryPoint element found in a Resource\n");
+ return ret;
+ }
+ } else {
+ resource->entry_point = 0;
+ }
+
+ /* read IntrinsicDuration */
+ if (!(element = ff_imf_xml_get_child_element_by_name(resource_elem, "IntrinsicDuration"))) {
+ av_log(NULL, AV_LOG_ERROR, "IntrinsicDuration element missing from Resource\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (ret = ff_imf_xml_read_uint32(element, &resource->duration)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid IntrinsicDuration element found in a Resource\n");
+ return ret;
+ }
+ resource->duration -= resource->entry_point;
+
+ /* read SourceDuration */
+ if (element = ff_imf_xml_get_child_element_by_name(resource_elem, "SourceDuration"))
+ if (ret = ff_imf_xml_read_uint32(element, &resource->duration)) {
+ av_log(NULL, AV_LOG_ERROR, "SourceDuration element missing from Resource\n");
+ return ret;
+ }
+
+ /* read RepeatCount */
+ if (element = ff_imf_xml_get_child_element_by_name(resource_elem, "RepeatCount"))
+ ret = ff_imf_xml_read_uint32(element, &resource->repeat_count);
+
+ return ret;
+}
+
+static int fill_trackfile_resource(xmlNodePtr tf_resource_elem,
+ FFIMFTrackFileResource *tf_resource,
+ FFIMFCPL *cpl)
+{
+ xmlNodePtr element = NULL;
+ int ret = 0;
+
+ if (ret = fill_base_resource(tf_resource_elem, (FFIMFBaseResource *)tf_resource, cpl))
+ return ret;
+
+ /* read TrackFileId */
+ if (element = ff_imf_xml_get_child_element_by_name(tf_resource_elem, "TrackFileId")) {
+ if (ret = ff_imf_xml_read_uuid(element, tf_resource->track_file_uuid)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid TrackFileId element found in Resource\n");
+ return ret;
+ }
+ } else {
+ av_log(NULL, AV_LOG_ERROR, "TrackFileId element missing from Resource\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ return ret;
+}
+
+static int fill_marker_resource(xmlNodePtr marker_resource_elem,
+ FFIMFMarkerResource *marker_resource,
+ FFIMFCPL *cpl)
+{
+ xmlNodePtr element = NULL;
+ void *tmp;
+ int ret = 0;
+
+ if (ret = fill_base_resource(marker_resource_elem, (FFIMFBaseResource *)marker_resource, cpl))
+ return ret;
+
+ /* read markers */
+ element = xmlFirstElementChild(marker_resource_elem);
+ while (element) {
+ if (xmlStrcmp(element->name, "Marker") == 0) {
+ tmp = av_realloc(marker_resource->markers,
+ (marker_resource->marker_count + 1) * sizeof(FFIMFMarker));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ marker_resource->markers = tmp;
+ imf_marker_init(&marker_resource->markers[marker_resource->marker_count]);
+ ret = fill_marker(element,
+ &marker_resource->markers[marker_resource->marker_count]);
+ marker_resource->marker_count++;
+ if (ret)
+ return ret;
+ }
+ element = xmlNextElementSibling(element);
+ }
+
+ return ret;
+}
+
+static int push_marker_sequence(xmlNodePtr marker_sequence_elem, FFIMFCPL *cpl)
+{
+ int ret = 0;
+ uint8_t uuid[16];
+ xmlNodePtr resource_list_elem = NULL;
+ xmlNodePtr resource_elem = NULL;
+ xmlNodePtr track_id_elem = NULL;
+ unsigned long resource_elem_count;
+ void *tmp;
+
+ /* read TrackID element */
+ if (!(track_id_elem = ff_imf_xml_get_child_element_by_name(marker_sequence_elem, "TrackId"))) {
+ av_log(NULL, AV_LOG_ERROR, "TrackId element missing from Sequence\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (ret = ff_imf_xml_read_uuid(track_id_elem, uuid)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid TrackId element found in Sequence\n");
+ return AVERROR_INVALIDDATA;
+ }
+ av_log(NULL,
+ AV_LOG_DEBUG,
+ "Processing IMF CPL Marker Sequence for Virtual Track " FF_IMF_UUID_FORMAT "\n",
+ UID_ARG(uuid));
+
+ /* create main marker virtual track if it does not exist */
+ if (!cpl->main_markers_track) {
+ cpl->main_markers_track = av_malloc(sizeof(FFIMFMarkerVirtualTrack));
+ if (!cpl->main_markers_track)
+ return AVERROR(ENOMEM);
+ imf_marker_virtual_track_init(cpl->main_markers_track);
+ memcpy(cpl->main_markers_track->base.id_uuid, uuid, sizeof(uuid));
+ } else if (memcmp(cpl->main_markers_track->base.id_uuid, uuid, sizeof(uuid)) != 0) {
+ av_log(NULL, AV_LOG_ERROR, "Multiple marker virtual tracks were found\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* process resources */
+ resource_list_elem = ff_imf_xml_get_child_element_by_name(marker_sequence_elem, "ResourceList");
+ if (!resource_list_elem)
+ return 0;
+ resource_elem_count = xmlChildElementCount(resource_list_elem);
+ tmp = av_realloc(cpl->main_markers_track->resources,
+ (cpl->main_markers_track->resource_count + resource_elem_count)
+ * sizeof(FFIMFMarkerResource));
+ if (!tmp) {
+ av_log(NULL, AV_LOG_ERROR, "Cannot allocate Marker Resources\n");
+ return AVERROR(ENOMEM);
+ }
+ cpl->main_markers_track->resources = tmp;
+
+ resource_elem = xmlFirstElementChild(resource_list_elem);
+ while (resource_elem) {
+ imf_marker_resource_init(
+ &cpl->main_markers_track->resources[cpl->main_markers_track->resource_count]);
+ ret = fill_marker_resource(resource_elem,
+ &cpl->main_markers_track->resources[cpl->main_markers_track->resource_count],
+ cpl);
+ cpl->main_markers_track->resource_count++;
+ if (ret)
+ return ret;
+ resource_elem = xmlNextElementSibling(resource_elem);
+ }
+
+ return ret;
+}
+
+static int has_stereo_resources(xmlNodePtr element)
+{
+ if (xmlStrcmp(element->name, "Left") == 0 || xmlStrcmp(element->name, "Right") == 0)
+ return 1;
+ element = xmlFirstElementChild(element);
+ while (element) {
+ if (has_stereo_resources(element))
+ return 1;
+ element = xmlNextElementSibling(element);
+ }
+ return 0;
+}
+
+static int push_main_audio_sequence(xmlNodePtr audio_sequence_elem, FFIMFCPL *cpl)
+{
+ int ret = 0;
+ uint8_t uuid[16];
+ xmlNodePtr resource_list_elem = NULL;
+ xmlNodePtr resource_elem = NULL;
+ xmlNodePtr track_id_elem = NULL;
+ unsigned long resource_elem_count;
+ FFIMFTrackFileVirtualTrack *vt = NULL;
+ void *tmp;
+
+ /* read TrackID element */
+ if (!(track_id_elem = ff_imf_xml_get_child_element_by_name(audio_sequence_elem, "TrackId"))) {
+ av_log(NULL, AV_LOG_ERROR, "TrackId element missing from audio sequence\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (ret = ff_imf_xml_read_uuid(track_id_elem, uuid)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid TrackId element found in audio sequence\n");
+ return ret;
+ }
+ av_log(NULL,
+ AV_LOG_DEBUG,
+ "Processing IMF CPL Audio Sequence for Virtual Track " FF_IMF_UUID_FORMAT "\n",
+ UID_ARG(uuid));
+
+ /* get the main audio virtual track corresponding to the sequence */
+ for (uint32_t i = 0; i < cpl->main_audio_track_count; i++)
+ if (memcmp(cpl->main_audio_tracks[i].base.id_uuid, uuid, sizeof(uuid)) == 0) {
+ vt = &cpl->main_audio_tracks[i];
+ break;
+ }
+
+ /* create a main audio virtual track if none exists for the sequence */
+ if (!vt) {
+ tmp = av_realloc(cpl->main_audio_tracks,
+ (cpl->main_audio_track_count + 1) * sizeof(FFIMFTrackFileVirtualTrack));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ cpl->main_audio_tracks = tmp;
+ vt = &cpl->main_audio_tracks[cpl->main_audio_track_count];
+ imf_trackfile_virtual_track_init(vt);
+ cpl->main_audio_track_count++;
+ memcpy(vt->base.id_uuid, uuid, sizeof(uuid));
+ }
+
+ /* process resources */
+ resource_list_elem = ff_imf_xml_get_child_element_by_name(audio_sequence_elem, "ResourceList");
+ if (!resource_list_elem)
+ return 0;
+ resource_elem_count = xmlChildElementCount(resource_list_elem);
+ tmp = av_fast_realloc(vt->resources,
+ &vt->resources_alloc_sz,
+ (vt->resource_count + resource_elem_count) * sizeof(FFIMFTrackFileResource));
+ if (!tmp) {
+ av_log(NULL, AV_LOG_ERROR, "Cannot allocate Main Audio Resources\n");
+ return AVERROR(ENOMEM);
+ }
+ vt->resources = tmp;
+
+ resource_elem = xmlFirstElementChild(resource_list_elem);
+ while (resource_elem) {
+ imf_trackfile_resource_init(&vt->resources[vt->resource_count]);
+ ret = fill_trackfile_resource(resource_elem,
+ &vt->resources[vt->resource_count],
+ cpl);
+ vt->resource_count++;
+ if (ret) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid Resource\n");
+ continue;
+ }
+ resource_elem = xmlNextElementSibling(resource_elem);
+ }
+
+ return ret;
+}
+
+static int push_main_image_2d_sequence(xmlNodePtr image_sequence_elem, FFIMFCPL *cpl)
+{
+ int ret = 0;
+ uint8_t uuid[16];
+ xmlNodePtr resource_list_elem = NULL;
+ xmlNodePtr resource_elem = NULL;
+ xmlNodePtr track_id_elem = NULL;
+ void *tmp;
+ unsigned long resource_elem_count;
+
+ /* skip stereoscopic resources */
+ if (has_stereo_resources(image_sequence_elem)) {
+ av_log(NULL, AV_LOG_ERROR, "Stereoscopic 3D image virtual tracks not supported\n");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ /* read TrackId element*/
+ if (!(track_id_elem = ff_imf_xml_get_child_element_by_name(image_sequence_elem, "TrackId"))) {
+ av_log(NULL, AV_LOG_ERROR, "TrackId element missing from audio sequence\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (ret = ff_imf_xml_read_uuid(track_id_elem, uuid)) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid TrackId element found in audio sequence\n");
+ return ret;
+ }
+
+ /* create main image virtual track if one does not exist */
+ if (!cpl->main_image_2d_track) {
+ cpl->main_image_2d_track = av_malloc(sizeof(FFIMFTrackFileVirtualTrack));
+ if (!cpl->main_image_2d_track)
+ return AVERROR(ENOMEM);
+ imf_trackfile_virtual_track_init(cpl->main_image_2d_track);
+ memcpy(cpl->main_image_2d_track->base.id_uuid, uuid, sizeof(uuid));
+ } else if (memcmp(cpl->main_image_2d_track->base.id_uuid, uuid, sizeof(uuid)) != 0) {
+ av_log(NULL, AV_LOG_ERROR, "Multiple MainImage virtual tracks found\n");
+ return AVERROR_INVALIDDATA;
+ }
+ av_log(NULL,
+ AV_LOG_DEBUG,
+ "Processing IMF CPL Main Image Sequence for Virtual Track " FF_IMF_UUID_FORMAT "\n",
+ UID_ARG(uuid));
+
+ /* process resources */
+ resource_list_elem = ff_imf_xml_get_child_element_by_name(image_sequence_elem, "ResourceList");
+ if (!resource_list_elem)
+ return 0;
+ resource_elem_count = xmlChildElementCount(resource_list_elem);
+ tmp = av_fast_realloc(cpl->main_image_2d_track->resources,
+ &cpl->main_image_2d_track->resources_alloc_sz,
+ (cpl->main_image_2d_track->resource_count + resource_elem_count) * sizeof(FFIMFTrackFileResource));
+ if (!tmp) {
+ av_log(NULL, AV_LOG_ERROR, "Cannot allocate Main Image Resources\n");
+ return AVERROR(ENOMEM);
+ }
+ cpl->main_image_2d_track->resources = tmp;
+
+ resource_elem = xmlFirstElementChild(resource_list_elem);
+ while (resource_elem) {
+ imf_trackfile_resource_init(
+ &cpl->main_image_2d_track->resources[cpl->main_image_2d_track->resource_count]);
+ ret = fill_trackfile_resource(resource_elem,
+ &cpl->main_image_2d_track->resources[cpl->main_image_2d_track->resource_count],
+ cpl);
+ cpl->main_image_2d_track->resource_count++;
+ if (ret) {
+ av_log(NULL, AV_LOG_ERROR, "Invalid Resource\n");
+ continue;
+ }
+ resource_elem = xmlNextElementSibling(resource_elem);
+ }
+
+ return 0;
+}
+
+static int fill_virtual_tracks(xmlNodePtr cpl_element, FFIMFCPL *cpl)
+{
+ int ret = 0;
+ xmlNodePtr segment_list_elem = NULL;
+ xmlNodePtr segment_elem = NULL;
+ xmlNodePtr sequence_list_elem = NULL;
+ xmlNodePtr sequence_elem = NULL;
+
+ if (!(segment_list_elem = ff_imf_xml_get_child_element_by_name(cpl_element, "SegmentList"))) {
+ av_log(NULL, AV_LOG_ERROR, "SegmentList element missing\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* process sequences */
+ segment_elem = xmlFirstElementChild(segment_list_elem);
+ while (segment_elem) {
+ av_log(NULL, AV_LOG_DEBUG, "Processing IMF CPL Segment\n");
+ sequence_list_elem = ff_imf_xml_get_child_element_by_name(segment_elem, "SequenceList");
+ if (!segment_list_elem)
+ continue;
+ sequence_elem = xmlFirstElementChild(sequence_list_elem);
+ while (sequence_elem) {
+ if (xmlStrcmp(sequence_elem->name, "MarkerSequence") == 0)
+ ret = push_marker_sequence(sequence_elem, cpl);
+ else if (xmlStrcmp(sequence_elem->name, "MainImageSequence") == 0)
+ ret = push_main_image_2d_sequence(sequence_elem, cpl);
+ else if (xmlStrcmp(sequence_elem->name, "MainAudioSequence") == 0)
+ ret = push_main_audio_sequence(sequence_elem, cpl);
+ else
+ av_log(NULL,
+ AV_LOG_INFO,
+ "The following Sequence is not supported and is ignored: %s\n",
+ sequence_elem->name);
+ if (ret == AVERROR(ENOMEM))
+ /* abort parsing only if memory error occurred */
+ return ret;
+ sequence_elem = xmlNextElementSibling(sequence_elem);
+ }
+ segment_elem = xmlNextElementSibling(segment_elem);
+ }
+
+ return ret;
+}
+
+int ff_imf_parse_cpl_from_xml_dom(xmlDocPtr doc, FFIMFCPL **cpl)
+{
+ int ret = 0;
+ xmlNodePtr cpl_element = NULL;
+
+ *cpl = ff_imf_cpl_alloc();
+ if (!*cpl) {
+ ret = AVERROR(ENOMEM);
+ goto cleanup;
+ }
+ cpl_element = xmlDocGetRootElement(doc);
+ if (xmlStrcmp(cpl_element->name, "CompositionPlaylist")) {
+ av_log(NULL, AV_LOG_ERROR, "The root element of the CPL is not CompositionPlaylist\n");
+ ret = AVERROR_INVALIDDATA;
+ goto cleanup;
+ }
+ if (ret = fill_content_title(cpl_element, *cpl))
+ goto cleanup;
+ if (ret = fill_id(cpl_element, *cpl))
+ goto cleanup;
+ if (ret = fill_edit_rate(cpl_element, *cpl))
+ goto cleanup;
+ if (ret = fill_virtual_tracks(cpl_element, *cpl))
+ goto cleanup;
+
+cleanup:
+ if (*cpl && ret) {
+ ff_imf_cpl_free(*cpl);
+ *cpl = NULL;
+ }
+ return ret;
+}
+
+static void imf_marker_free(FFIMFMarker *marker)
+{
+ if (!marker)
+ return;
+ xmlFree(marker->label_utf8);
+ xmlFree(marker->scope_utf8);
+}
+
+static void imf_marker_resource_free(FFIMFMarkerResource *rsrc)
+{
+ if (!rsrc)
+ return;
+ for (uint32_t i = 0; i < rsrc->marker_count; i++)
+ imf_marker_free(&rsrc->markers[i]);
+ av_freep(&rsrc->markers);
+}
+
+static void imf_marker_virtual_track_free(FFIMFMarkerVirtualTrack *vt)
+{
+ if (!vt)
+ return;
+ for (uint32_t i = 0; i < vt->resource_count; i++)
+ imf_marker_resource_free(&vt->resources[i]);
+ av_freep(&vt->resources);
+}
+
+static void imf_trackfile_virtual_track_free(FFIMFTrackFileVirtualTrack *vt)
+{
+ if (!vt)
+ return;
+ av_freep(&vt->resources);
+}
+
+static void imf_cpl_init(FFIMFCPL *cpl)
+{
+ memset(cpl->id_uuid, 0, sizeof(cpl->id_uuid));
+ cpl->content_title_utf8 = NULL;
+ cpl->edit_rate = av_make_q(0, 1);
+ cpl->main_markers_track = NULL;
+ cpl->main_image_2d_track = NULL;
+ cpl->main_audio_track_count = 0;
+ cpl->main_audio_tracks = NULL;
+}
+
+FFIMFCPL *ff_imf_cpl_alloc(void)
+{
+ FFIMFCPL *cpl;
+
+ cpl = av_malloc(sizeof(FFIMFCPL));
+ if (!cpl)
+ return NULL;
+ imf_cpl_init(cpl);
+ return cpl;
+}
+
+void ff_imf_cpl_free(FFIMFCPL *cpl)
+{
+ if (!cpl)
+ return;
+ xmlFree(cpl->content_title_utf8);
+ imf_marker_virtual_track_free(cpl->main_markers_track);
+ if (cpl->main_markers_track)
+ av_freep(&cpl->main_markers_track);
+ imf_trackfile_virtual_track_free(cpl->main_image_2d_track);
+ if (cpl->main_image_2d_track)
+ av_freep(&cpl->main_image_2d_track);
+ for (uint32_t i = 0; i < cpl->main_audio_track_count; i++)
+ imf_trackfile_virtual_track_free(&cpl->main_audio_tracks[i]);
+ if (cpl->main_audio_tracks)
+ av_freep(&cpl->main_audio_tracks);
+ av_freep(&cpl);
+}
+
+int ff_imf_parse_cpl(AVIOContext *in, FFIMFCPL **cpl)
+{
+ AVBPrint buf;
+ xmlDoc *doc = NULL;
+ int ret = 0;
+ int64_t filesize = 0;
+
+ filesize = avio_size(in);
+ filesize = filesize > 0 ? filesize : 8192;
+ av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
+ ret = avio_read_to_bprint(in, &buf, UINT_MAX - 1);
+ if (ret < 0 || !avio_feof(in) || buf.len == 0) {
+ av_log(NULL, AV_LOG_ERROR, "Cannot read IMF CPL\n");
+ if (ret == 0) {
+ ret = AVERROR_INVALIDDATA;
+ }
+ } else {
+ LIBXML_TEST_VERSION
+ filesize = buf.len;
+ doc = xmlReadMemory(buf.str, filesize, NULL, NULL, 0);
+ if (!doc) {
+ av_log(NULL,
+ AV_LOG_ERROR,
+ "XML parsing failed when reading the IMF CPL\n");
+ ret = AVERROR_INVALIDDATA;
+ }
+ if (ret = ff_imf_parse_cpl_from_xml_dom(doc, cpl)) {
+ av_log(NULL, AV_LOG_ERROR, "Cannot parse IMF CPL\n");
+ } else {
+ av_log(NULL,
+ AV_LOG_INFO,
+ "IMF CPL ContentTitle: %s\n",
+ (*cpl)->content_title_utf8);
+ av_log(NULL,
+ AV_LOG_INFO,
+ "IMF CPL Id: " FF_IMF_UUID_FORMAT "\n",
+ UID_ARG((*cpl)->id_uuid));
+ }
+ xmlFreeDoc(doc);
+ }
+ av_bprint_finalize(&buf, NULL);
+
+ return ret;
+}
new file mode 100644
@@ -0,0 +1,905 @@
+/*
+ * 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.
+ */
+
+/**
+ * Demuxes an IMF Composition
+ *
+ * References
+ * OV 2067-0:2018 - SMPTE Overview Document - Interoperable Master Format
+ * ST 2067-2:2020 - SMPTE Standard - Interoperable Master Format — Core Constraints
+ * ST 2067-3:2020 - SMPTE Standard - Interoperable Master Format — Composition Playlist
+ * ST 2067-5:2020 - SMPTE Standard - Interoperable Master Format — Essence Component
+ * ST 2067-20:2016 - SMPTE Standard - Interoperable Master Format — Application #2
+ * ST 2067-21:2020 - SMPTE Standard - Interoperable Master Format — Application #2 Extended
+ * ST 2067-102:2017 - SMPTE Standard - Interoperable Master Format — Common Image Pixel Color Schemes
+ * ST 429-9:2007 - SMPTE Standard - D-Cinema Packaging — Asset Mapping and File Segmentation
+ *
+ * @author Marc-Antoine Arnaud
+ * @author Valentin Noel
+ * @author Nicholas Vanderzwet
+ * @file
+ * @ingroup lavu_imf
+ */
+
+#include "imf.h"
+#include "internal.h"
+#include "libavutil/avstring.h"
+#include "libavutil/bprint.h"
+#include "libavutil/opt.h"
+#include "mxf.h"
+#include "url.h"
+#include <inttypes.h>
+#include <libxml/parser.h>
+
+#define MAX_BPRINT_READ_SIZE (UINT_MAX - 1)
+#define DEFAULT_ASSETMAP_SIZE 8 * 1024
+#define AVRATIONAL_FORMAT "%d/%d"
+#define AVRATIONAL_ARG(rational) rational.num, rational.den
+
+/**
+ * IMF Asset locator
+ */
+typedef struct IMFAssetLocator {
+ FFIMFUUID uuid;
+ char *absolute_uri;
+} IMFAssetLocator;
+
+/**
+ * IMF Asset locator map
+ * Results from the parsing of one or more ASSETMAP XML files
+ */
+typedef struct IMFAssetLocatorMap {
+ uint32_t asset_count;
+ IMFAssetLocator *assets;
+} IMFAssetLocatorMap;
+
+typedef struct IMFVirtualTrackResourcePlaybackCtx {
+ IMFAssetLocator *locator;
+ FFIMFTrackFileResource *resource;
+ AVFormatContext *ctx;
+} IMFVirtualTrackResourcePlaybackCtx;
+
+typedef struct IMFVirtualTrackPlaybackCtx {
+ // Track index in playlist
+ int32_t index;
+ // Time counters
+ AVRational current_timestamp;
+ AVRational duration;
+ // Resources
+ uint32_t resource_count;
+ uint32_t resources_alloc_sz;
+ IMFVirtualTrackResourcePlaybackCtx *resources;
+ // Decoding cursors
+ uint32_t current_resource_index;
+ int64_t last_pts;
+} IMFVirtualTrackPlaybackCtx;
+
+typedef struct IMFContext {
+ const AVClass *class;
+ const char *base_url;
+ char *asset_map_paths;
+ AVIOInterruptCB *interrupt_callback;
+ AVDictionary *avio_opts;
+ FFIMFCPL *cpl;
+ IMFAssetLocatorMap asset_locator_map;
+ uint32_t track_count;
+ IMFVirtualTrackPlaybackCtx **tracks;
+} IMFContext;
+
+static int imf_uri_is_url(const char *string)
+{
+ return strstr(string, "://") != NULL;
+}
+
+static int imf_uri_is_unix_abs_path(const char *string)
+{
+ return string[0] == '/';
+}
+
+static int imf_uri_is_dos_abs_path(const char *string)
+{
+ /* Absolute path case: `C:\path\to\somwhere` */
+ if (string[1] == ':' && string[2] == '\\')
+ return 1;
+
+ /* Absolute path case: `C:/path/to/somwhere` */
+ if (string[1] == ':' && string[2] == '/')
+ return 1;
+
+ /* Network path case: `\\path\to\somwhere` */
+ if (string[0] == '\\' && string[1] == '\\')
+ return 1;
+
+ return 0;
+}
+
+/**
+ * Parse a ASSETMAP XML file to extract the UUID-URI mapping of assets.
+ * @param s the current format context, if any (can be NULL).
+ * @param doc the XML document to be parsed.
+ * @param asset_map pointer on the IMFAssetLocatorMap to fill.
+ * @param base_url the url of the asset map XML file, if any (can be NULL).
+ * @return a negative value in case of error, 0 otherwise.
+ */
+static int parse_imf_asset_map_from_xml_dom(AVFormatContext *s,
+ xmlDocPtr doc,
+ IMFAssetLocatorMap *asset_map,
+ const char *base_url)
+{
+ xmlNodePtr asset_map_element = NULL;
+ xmlNodePtr node = NULL;
+ xmlNodePtr asset_element = NULL;
+ char *uri;
+ int ret = 0;
+ IMFAssetLocator *asset = NULL;
+ void *tmp;
+
+ asset_map_element = xmlDocGetRootElement(doc);
+
+ if (!asset_map_element) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing root node\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (asset_map_element->type != XML_ELEMENT_NODE || av_strcasecmp(asset_map_element->name, "AssetMap")) {
+ av_log(s,
+ AV_LOG_ERROR,
+ "Unable to parse asset map XML - wrong root node name[%s] type[%d]\n",
+ asset_map_element->name,
+ (int)asset_map_element->type);
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* parse asset locators */
+ if (!(node = ff_imf_xml_get_child_element_by_name(asset_map_element, "AssetList"))) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing AssetList node\n");
+ return AVERROR_INVALIDDATA;
+ }
+ tmp = av_realloc(asset_map->assets,
+ (xmlChildElementCount(node) + asset_map->asset_count)
+ * sizeof(IMFAssetLocator));
+ if (!tmp) {
+ av_log(NULL, AV_LOG_ERROR, "Cannot allocate IMF asset locators\n");
+ return AVERROR(ENOMEM);
+ }
+ asset_map->assets = tmp;
+
+ asset_element = xmlFirstElementChild(node);
+ while (asset_element) {
+ if (av_strcasecmp(asset_element->name, "Asset") != 0)
+ continue;
+
+ asset = &(asset_map->assets[asset_map->asset_count]);
+
+ if (ff_imf_xml_read_uuid(ff_imf_xml_get_child_element_by_name(asset_element, "Id"), asset->uuid)) {
+ av_log(s, AV_LOG_ERROR, "Could not parse UUID from asset in asset map.\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ av_log(s, AV_LOG_DEBUG, "Found asset id: " FF_IMF_UUID_FORMAT "\n", UID_ARG(asset->uuid));
+
+ if (!(node = ff_imf_xml_get_child_element_by_name(asset_element, "ChunkList"))) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing ChunkList node\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (!(node = ff_imf_xml_get_child_element_by_name(node, "Chunk"))) {
+ av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing Chunk node\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ uri = xmlNodeGetContent(ff_imf_xml_get_child_element_by_name(node, "Path"));
+ if (!imf_uri_is_url(uri) && !imf_uri_is_unix_abs_path(uri) && !imf_uri_is_dos_abs_path(uri))
+ asset->absolute_uri = av_append_path_component(base_url, uri);
+ else
+ asset->absolute_uri = av_strdup(uri);
+ xmlFree(uri);
+ if (!asset->absolute_uri) {
+ return AVERROR(ENOMEM);
+ }
+
+ av_log(s, AV_LOG_DEBUG, "Found asset absolute URI: %s\n", asset->absolute_uri);
+
+ asset_map->asset_count++;
+ asset_element = xmlNextElementSibling(asset_element);
+ }
+
+ return ret;
+}
+
+/**
+ * Initializes an IMFAssetLocatorMap structure.
+ */
+static void imf_asset_locator_map_init(IMFAssetLocatorMap *asset_map)
+{
+ asset_map->assets = NULL;
+ asset_map->asset_count = 0;
+}
+
+/**
+ * Free a IMFAssetLocatorMap pointer.
+ */
+static void imf_asset_locator_map_deinit(IMFAssetLocatorMap *asset_map)
+{
+ for (uint32_t i = 0; i < asset_map->asset_count; ++i)
+ av_freep(&asset_map->assets[i].absolute_uri);
+ av_freep(&asset_map->assets);
+}
+
+static int parse_assetmap(AVFormatContext *s, const char *url)
+{
+ IMFContext *c = s->priv_data;
+ AVIOContext *in = NULL;
+ struct AVBPrint buf;
+ AVDictionary *opts = NULL;
+ xmlDoc *doc = NULL;
+ const char *base_url;
+ char *tmp_str = NULL;
+ int close_in = 0;
+ int ret;
+ int64_t filesize;
+
+ av_log(s, AV_LOG_DEBUG, "Asset Map URL: %s\n", url);
+
+ if (!in) {
+ close_in = 1;
+
+ av_dict_copy(&opts, c->avio_opts, 0);
+ ret = s->io_open(s, &in, url, AVIO_FLAG_READ, &opts);
+ av_dict_free(&opts);
+ if (ret < 0)
+ return ret;
+ }
+
+ filesize = avio_size(in);
+ filesize = filesize > 0 ? filesize : DEFAULT_ASSETMAP_SIZE;
+
+ av_bprint_init(&buf, filesize + 1, AV_BPRINT_SIZE_UNLIMITED);
+
+ ret = avio_read_to_bprint(in, &buf, MAX_BPRINT_READ_SIZE);
+ if (ret < 0 || !avio_feof(in) || buf.len == 0) {
+ av_log(s, AV_LOG_ERROR, "Unable to read to asset map '%s'\n", url);
+ if (ret == 0)
+ ret = AVERROR_INVALIDDATA;
+ goto clean_up;
+ }
+
+ LIBXML_TEST_VERSION
+
+ tmp_str = av_strdup(url);
+ if (!tmp_str) {
+ ret = AVERROR(ENOMEM);
+ goto clean_up;
+ }
+ base_url = av_dirname(tmp_str);
+
+ filesize = buf.len;
+ doc = xmlReadMemory(buf.str, filesize, url, NULL, 0);
+
+ ret = parse_imf_asset_map_from_xml_dom(s, doc, &c->asset_locator_map, base_url);
+ if (!ret)
+ av_log(s,
+ AV_LOG_DEBUG,
+ "Found %d assets from %s\n",
+ c->asset_locator_map.asset_count,
+ url);
+
+ xmlFreeDoc(doc);
+
+clean_up:
+ if (tmp_str)
+ av_freep(&tmp_str);
+ if (close_in)
+ avio_close(in);
+ av_bprint_finalize(&buf, NULL);
+
+ return ret;
+}
+
+static IMFAssetLocator *find_asset_map_locator(IMFAssetLocatorMap *asset_map, FFIMFUUID uuid)
+{
+ for (uint32_t i = 0; i < asset_map->asset_count; ++i)
+ if (memcmp(asset_map->assets[i].uuid, uuid, 16) == 0)
+ return &(asset_map->assets[i]);
+ return NULL;
+}
+
+static int open_track_resource_context(AVFormatContext *s,
+ IMFVirtualTrackResourcePlaybackCtx *track_resource)
+{
+ IMFContext *c = s->priv_data;
+ int ret = 0;
+ int64_t entry_point;
+ AVDictionary *opts = NULL;
+
+ if (!track_resource->ctx) {
+ track_resource->ctx = avformat_alloc_context();
+ if (!track_resource->ctx)
+ return AVERROR(ENOMEM);
+ }
+
+ if (track_resource->ctx->iformat) {
+ av_log(s,
+ AV_LOG_DEBUG,
+ "Input context already opened for %s.\n",
+ track_resource->locator->absolute_uri);
+ return 0;
+ }
+
+ track_resource->ctx->io_open = s->io_open;
+ track_resource->ctx->io_close = s->io_close;
+ track_resource->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
+
+ if ((ret = ff_copy_whiteblacklists(track_resource->ctx, s)) < 0)
+ goto cleanup;
+
+ av_dict_copy(&opts, c->avio_opts, 0);
+ ret = avformat_open_input(&track_resource->ctx,
+ track_resource->locator->absolute_uri,
+ NULL,
+ &opts);
+ av_dict_free(&opts);
+ if (ret < 0) {
+ av_log(s,
+ AV_LOG_ERROR,
+ "Could not open %s input context: %s\n",
+ track_resource->locator->absolute_uri,
+ av_err2str(ret));
+ return ret;
+ }
+
+ if (av_strcasecmp(track_resource->ctx->iformat->name, "mxf")) {
+ av_log(s,
+ AV_LOG_ERROR,
+ "Track file kind is not MXF but %s instead\n",
+ track_resource->ctx->iformat->name);
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* Compare the source timebase to the resource edit rate, considering the first stream of the source file */
+ if (av_cmp_q(track_resource->ctx->streams[0]->time_base, av_inv_q(track_resource->resource->base.edit_rate)))
+ av_log(s,
+ AV_LOG_WARNING,
+ "Incoherent source stream timebase %d/%d regarding resource edit rate: %d/%d",
+ track_resource->ctx->streams[0]->time_base.num,
+ track_resource->ctx->streams[0]->time_base.den,
+ track_resource->resource->base.edit_rate.den,
+ track_resource->resource->base.edit_rate.num);
+
+ entry_point = (int64_t)track_resource->resource->base.entry_point
+ * track_resource->resource->base.edit_rate.den
+ * AV_TIME_BASE
+ / track_resource->resource->base.edit_rate.num;
+
+ if (entry_point) {
+ av_log(s,
+ AV_LOG_DEBUG,
+ "Seek at resource %s entry point: %" PRIu32 "\n",
+ track_resource->locator->absolute_uri,
+ track_resource->resource->base.entry_point);
+ ret = avformat_seek_file(track_resource->ctx, -1, entry_point, entry_point, entry_point, 0);
+ if (ret < 0) {
+ av_log(s,
+ AV_LOG_ERROR,
+ "Could not seek at %" PRId64 "on %s: %s\n",
+ entry_point,
+ track_resource->locator->absolute_uri,
+ av_err2str(ret));
+ goto cleanup;
+ }
+ }
+
+ return ret;
+cleanup:
+ avformat_free_context(track_resource->ctx);
+ track_resource->ctx = NULL;
+ return ret;
+}
+
+static int open_track_file_resource(AVFormatContext *s,
+ FFIMFTrackFileResource *track_file_resource,
+ IMFVirtualTrackPlaybackCtx *track)
+{
+ IMFContext *c = s->priv_data;
+ IMFAssetLocator *asset_locator;
+ IMFVirtualTrackResourcePlaybackCtx vt_ctx;
+ void *tmp;
+ int ret;
+
+ asset_locator = find_asset_map_locator(&c->asset_locator_map, track_file_resource->track_file_uuid);
+ if (!asset_locator) {
+ av_log(s,
+ AV_LOG_ERROR,
+ "Could not find asset locator for UUID: " FF_IMF_UUID_FORMAT "\n",
+ UID_ARG(track_file_resource->track_file_uuid));
+ return AVERROR_INVALIDDATA;
+ }
+
+ av_log(s,
+ AV_LOG_DEBUG,
+ "Found locator for " FF_IMF_UUID_FORMAT ": %s\n",
+ UID_ARG(asset_locator->uuid),
+ asset_locator->absolute_uri);
+ tmp = av_fast_realloc(track->resources,
+ &track->resources_alloc_sz,
+ (track->resource_count + track_file_resource->base.repeat_count)
+ * sizeof(IMFVirtualTrackResourcePlaybackCtx));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+ track->resources = tmp;
+
+ for (uint32_t i = 0; i < track_file_resource->base.repeat_count; ++i) {
+ vt_ctx.locator = asset_locator;
+ vt_ctx.resource = track_file_resource;
+ vt_ctx.ctx = NULL;
+ if ((ret = open_track_resource_context(s, &vt_ctx)) != 0)
+ return ret;
+ track->resources[track->resource_count++] = vt_ctx;
+ track->duration = av_add_q(track->duration,
+ av_make_q((int)track_file_resource->base.duration * track_file_resource->base.edit_rate.den,
+ track_file_resource->base.edit_rate.num));
+ }
+
+ return ret;
+}
+
+static void imf_virtual_track_playback_context_deinit(IMFVirtualTrackPlaybackCtx *track)
+{
+ for (uint32_t i = 0; i < track->resource_count; ++i)
+ if (track->resources[i].ctx && track->resources[i].ctx->iformat)
+ 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);
+
+ tmp = av_realloc(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;
+
+ AVStream *asset_stream;
+ AVStream *first_resource_stream;
+
+ int ret = 0;
+
+ for (uint32_t i = 0; i < c->track_count; ++i) {
+ /* 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");
+ break;
+ }
+ 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");
+ break;
+ }
+ 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 ret;
+}
+
+static int save_avio_options(AVFormatContext *s)
+{
+ IMFContext *c = s->priv_data;
+ static const char *const opts[] = {
+ "headers", "http_proxy", "user_agent", "cookies", "referer", "rw_timeout", "icy", NULL};
+ const char *const *opt = opts;
+ uint8_t *buf;
+ int ret = 0;
+
+ while (*opt) {
+ if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
+ ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
+ if (ret < 0)
+ return ret;
+ }
+ opt++;
+ }
+
+ return ret;
+}
+
+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) {
+ ret = AVERROR(ENOMEM);
+ return ret;
+ }
+ c->base_url = av_dirname(tmp_str);
+ if ((ret = save_avio_options(s)) < 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 = 0; i < c->track_count; ++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]->current_timestamp),
+ AVRATIONAL_ARG(minimum_timestamp),
+ AVRATIONAL_ARG(c->tracks[i]->duration));
+ if (av_cmp_q(c->tracks[i]->current_timestamp, minimum_timestamp) < 0) {
+ track = c->tracks[i];
+ 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);
+ avformat_close_input(&(track->resources[track->current_resource_index].ctx));
+ if (open_track_resource_context(s, &(track->resources[i])) != 0)
+ return NULL;
+ 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_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
+};