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FFmpeg/libavformat/imf_cpl.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
*
* Copyright (c) Sandflow Consulting LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Implements IMP CPL processing
*
* @author Pierre-Anthony Lemieux
* @file
* @ingroup lavu_imf
*/
#include "imf.h"
#include "libavutil/bprint.h"
#include "libavutil/error.h"
#include "libavutil/mem.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, AVUUID uuid)
{
int ret = 0;
xmlChar *element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
if (!element_text)
return AVERROR_INVALIDDATA;
ret = av_uuid_urn_parse(element_text, uuid);
if (ret)
ret = AVERROR_INVALIDDATA;
xmlFree(element_text);
return ret;
}
int ff_imf_xml_read_rational(xmlNodePtr element, AVRational *rational)
{
int ret = 0;
xmlChar *element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
if (element_text == NULL || sscanf(element_text, "%i %i", &rational->num, &rational->den) != 2)
ret = AVERROR_INVALIDDATA;
xmlFree(element_text);
return ret;
}
int ff_imf_xml_read_uint32(xmlNodePtr element, uint32_t *number)
{
int ret = 0;
xmlChar *element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
if (element_text == NULL || sscanf(element_text, "%" PRIu32, number) != 1)
ret = AVERROR_INVALIDDATA;
xmlFree(element_text);
return ret;
}
static int ff_imf_xml_read_boolean(xmlNodePtr element, int *value)
{
int ret = 0;
xmlChar *element_text = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
if (xmlStrcmp(element_text, "true") == 0 || xmlStrcmp(element_text, "1") == 0)
*value = 1;
else if (xmlStrcmp(element_text, "false") == 0 || xmlStrcmp(element_text, "0") == 0)
*value = 0;
else
ret = 1;
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")))
return AVERROR_INVALIDDATA;
cpl->content_title_utf8 = xmlNodeListGetString(cpl_element->doc,
element->xmlChildrenNode,
1);
if (!cpl->content_title_utf8)
cpl->content_title_utf8 = xmlStrdup("");
if (!cpl->content_title_utf8)
return AVERROR(ENOMEM);
return 0;
}
static int digit_to_int(char digit)
{
if (digit >= '0' && digit <= '9')
return digit - '0';
return -1;
}
/**
* Parses a string that conform to the TimecodeType used in IMF CPL and defined
* in SMPTE ST 2067-3.
* @param[in] s string to parse
* @param[out] tc_comps pointer to an array of 4 integers where the parsed HH,
* MM, SS and FF fields of the timecode are returned.
* @return 0 on success, < 0 AVERROR code on error.
*/
static int parse_cpl_tc_type(const char *s, int *tc_comps)
{
if (av_strnlen(s, 11) != 11)
return AVERROR(EINVAL);
for (int i = 0; i < 4; i++) {
int hi;
int lo;
hi = digit_to_int(s[i * 3]);
lo = digit_to_int(s[i * 3 + 1]);
if (hi == -1 || lo == -1)
return AVERROR(EINVAL);
tc_comps[i] = 10 * hi + lo;
}
return 0;
}
static int fill_timecode(xmlNodePtr cpl_element, FFIMFCPL *cpl)
{
xmlNodePtr tc_element = NULL;
xmlNodePtr element = NULL;
xmlChar *tc_str = NULL;
int df = 0;
int comps[4];
int ret = 0;
tc_element = ff_imf_xml_get_child_element_by_name(cpl_element, "CompositionTimecode");
if (!tc_element)
return 0;
element = ff_imf_xml_get_child_element_by_name(tc_element, "TimecodeDropFrame");
if (!element)
return AVERROR_INVALIDDATA;
if (ff_imf_xml_read_boolean(element, &df))
return AVERROR_INVALIDDATA;
element = ff_imf_xml_get_child_element_by_name(tc_element, "TimecodeStartAddress");
if (!element)
return AVERROR_INVALIDDATA;
tc_str = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1);
if (!tc_str)
return AVERROR_INVALIDDATA;
ret = parse_cpl_tc_type(tc_str, comps);
xmlFree(tc_str);
if (ret)
return ret;
cpl->tc = av_malloc(sizeof(AVTimecode));
if (!cpl->tc)
return AVERROR(ENOMEM);
ret = av_timecode_init_from_components(cpl->tc, cpl->edit_rate,
df ? AV_TIMECODE_FLAG_DROPFRAME : 0,
comps[0], comps[1], comps[2], comps[3],
NULL);
return ret;
}
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")))
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")))
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")))
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")))
return AVERROR_INVALIDDATA;
if (!(marker->label_utf8 = xmlNodeListGetString(element->doc, element->xmlChildrenNode, 1)))
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(void *log_ctx, 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(log_ctx, 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(log_ctx, 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(log_ctx, AV_LOG_ERROR, "IntrinsicDuration element missing from Resource\n");
return AVERROR_INVALIDDATA;
}
if ((ret = ff_imf_xml_read_uint32(element, &resource->duration))) {
av_log(log_ctx, 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(log_ctx, 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(void *log_ctx, xmlNodePtr tf_resource_elem,
FFIMFTrackFileResource *tf_resource,
FFIMFCPL *cpl)
{
xmlNodePtr element = NULL;
int ret = 0;
if ((ret = fill_base_resource(log_ctx, 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(log_ctx, AV_LOG_ERROR, "Invalid TrackFileId element found in Resource\n");
return ret;
}
} else {
av_log(log_ctx, AV_LOG_ERROR, "TrackFileId element missing from Resource\n");
return AVERROR_INVALIDDATA;
}
return ret;
}
static int fill_marker_resource(void *log_ctx, xmlNodePtr marker_resource_elem,
FFIMFMarkerResource *marker_resource,
FFIMFCPL *cpl)
{
xmlNodePtr element = NULL;
int ret = 0;
if ((ret = fill_base_resource(log_ctx, marker_resource_elem, (FFIMFBaseResource *)marker_resource, cpl)))
return ret;
/* read markers */
element = xmlFirstElementChild(marker_resource_elem);
while (element) {
if (xmlStrcmp(element->name, "Marker") == 0) {
void *tmp;
if (marker_resource->marker_count == UINT32_MAX)
return AVERROR(ENOMEM);
tmp = av_realloc_array(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) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid Marker element\n");
return ret;
}
}
element = xmlNextElementSibling(element);
}
return ret;
}
static int push_marker_sequence(void *log_ctx, xmlNodePtr marker_sequence_elem, FFIMFCPL *cpl)
{
int ret = 0;
AVUUID uuid;
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(log_ctx, AV_LOG_ERROR, "TrackId element missing from Sequence\n");
return AVERROR_INVALIDDATA;
}
if (ff_imf_xml_read_uuid(track_id_elem, uuid)) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid TrackId element found in Sequence\n");
return AVERROR_INVALIDDATA;
}
av_log(log_ctx,
AV_LOG_DEBUG,
"Processing IMF CPL Marker Sequence for Virtual Track " AV_PRI_UUID "\n",
AV_UUID_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);
av_uuid_copy(cpl->main_markers_track->base.id_uuid, uuid);
} else if (!av_uuid_equal(cpl->main_markers_track->base.id_uuid, uuid)) {
av_log(log_ctx, 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);
if (resource_elem_count > UINT32_MAX
|| cpl->main_markers_track->resource_count > UINT32_MAX - resource_elem_count)
return AVERROR(ENOMEM);
tmp = av_realloc_array(cpl->main_markers_track->resources,
cpl->main_markers_track->resource_count + resource_elem_count,
sizeof(FFIMFMarkerResource));
if (!tmp) {
av_log(log_ctx, 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(log_ctx, 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(void *log_ctx, xmlNodePtr audio_sequence_elem, FFIMFCPL *cpl)
{
int ret = 0;
AVUUID uuid;
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(log_ctx, 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(log_ctx, AV_LOG_ERROR, "Invalid TrackId element found in audio sequence\n");
return ret;
}
av_log(log_ctx,
AV_LOG_DEBUG,
"Processing IMF CPL Audio Sequence for Virtual Track " AV_PRI_UUID "\n",
AV_UUID_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 (av_uuid_equal(cpl->main_audio_tracks[i].base.id_uuid, uuid)) {
vt = &cpl->main_audio_tracks[i];
break;
}
}
/* create a main audio virtual track if none exists for the sequence */
if (!vt) {
if (cpl->main_audio_track_count == UINT32_MAX)
return AVERROR(ENOMEM);
tmp = av_realloc_array(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++;
av_uuid_copy(vt->base.id_uuid, 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);
if (resource_elem_count > UINT32_MAX
|| vt->resource_count > UINT32_MAX - resource_elem_count)
return AVERROR(ENOMEM);
tmp = av_fast_realloc(vt->resources,
&vt->resources_alloc_sz,
(vt->resource_count + resource_elem_count)
* sizeof(FFIMFTrackFileResource));
if (!tmp) {
av_log(log_ctx, 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(log_ctx, resource_elem,
&vt->resources[vt->resource_count],
cpl);
if (ret)
av_log(log_ctx, AV_LOG_ERROR, "Invalid Resource\n");
else
vt->resource_count++;
resource_elem = xmlNextElementSibling(resource_elem);
}
return ret;
}
static int push_main_image_2d_sequence(void *log_ctx, xmlNodePtr image_sequence_elem, FFIMFCPL *cpl)
{
int ret = 0;
AVUUID uuid;
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(log_ctx, 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(log_ctx, 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(log_ctx, 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);
av_uuid_copy(cpl->main_image_2d_track->base.id_uuid, uuid);
} else if (!av_uuid_equal(cpl->main_image_2d_track->base.id_uuid, uuid)) {
av_log(log_ctx, AV_LOG_ERROR, "Multiple MainImage virtual tracks found\n");
return AVERROR_INVALIDDATA;
}
av_log(log_ctx,
AV_LOG_DEBUG,
"Processing IMF CPL Main Image Sequence for Virtual Track " AV_PRI_UUID "\n",
AV_UUID_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);
if (resource_elem_count > UINT32_MAX
|| cpl->main_image_2d_track->resource_count > UINT32_MAX - resource_elem_count
|| (cpl->main_image_2d_track->resource_count + resource_elem_count)
> INT_MAX / sizeof(FFIMFTrackFileResource))
return AVERROR(ENOMEM);
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(log_ctx, 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(log_ctx, resource_elem,
&cpl->main_image_2d_track->resources[cpl->main_image_2d_track->resource_count],
cpl);
if (ret)
av_log(log_ctx, AV_LOG_ERROR, "Invalid Resource\n");
else
cpl->main_image_2d_track->resource_count++;
resource_elem = xmlNextElementSibling(resource_elem);
}
return 0;
}
static int fill_virtual_tracks(void *log_ctx, 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(log_ctx, AV_LOG_ERROR, "SegmentList element missing\n");
return AVERROR_INVALIDDATA;
}
/* process sequences */
segment_elem = xmlFirstElementChild(segment_list_elem);
while (segment_elem) {
av_log(log_ctx, AV_LOG_DEBUG, "Processing IMF CPL Segment\n");
sequence_list_elem = ff_imf_xml_get_child_element_by_name(segment_elem, "SequenceList");
if (!sequence_list_elem)
continue;
sequence_elem = xmlFirstElementChild(sequence_list_elem);
while (sequence_elem) {
if (xmlStrcmp(sequence_elem->name, "MarkerSequence") == 0)
ret = push_marker_sequence(log_ctx, sequence_elem, cpl);
else if (xmlStrcmp(sequence_elem->name, "MainImageSequence") == 0)
ret = push_main_image_2d_sequence(log_ctx, sequence_elem, cpl);
else if (xmlStrcmp(sequence_elem->name, "MainAudioSequence") == 0)
ret = push_main_audio_sequence(log_ctx, sequence_elem, cpl);
else
av_log(log_ctx,
AV_LOG_INFO,
"The following Sequence is not supported and is ignored: %s\n",
sequence_elem->name);
/* abort parsing only if memory error occurred */
if (ret == AVERROR(ENOMEM))
return ret;
sequence_elem = xmlNextElementSibling(sequence_elem);
}
segment_elem = xmlNextElementSibling(segment_elem);
}
return ret;
}
int ff_imf_parse_cpl_from_xml_dom(void *log_ctx, 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 (!cpl_element || xmlStrcmp(cpl_element->name, "CompositionPlaylist")) {
av_log(log_ctx, 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))) {
av_log(log_ctx, AV_LOG_ERROR, "Cannot read the ContentTitle element from the IMF CPL\n");
goto cleanup;
}
if ((ret = fill_id(cpl_element, *cpl))) {
av_log(log_ctx, AV_LOG_ERROR, "Id element not found in the IMF CPL\n");
goto cleanup;
}
if ((ret = fill_edit_rate(cpl_element, *cpl))) {
av_log(log_ctx, AV_LOG_ERROR, "EditRate element not found in the IMF CPL\n");
goto cleanup;
}
if ((ret = fill_timecode(cpl_element, *cpl))) {
av_log(log_ctx, AV_LOG_ERROR, "Invalid CompositionTimecode element found in the IMF CPL\n");
goto cleanup;
}
if ((ret = fill_virtual_tracks(log_ctx, 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)
{
av_uuid_nil(cpl->id_uuid);
cpl->content_title_utf8 = NULL;
cpl->edit_rate = av_make_q(0, 1);
cpl->tc = NULL;
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;
if (cpl->tc)
av_freep(&cpl->tc);
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(void *log_ctx, AVIOContext *in, FFIMFCPL **cpl)
{
AVBPrint buf;
xmlDoc *doc = NULL;
int ret = 0;
av_bprint_init(&buf, 0, INT_MAX); // xmlReadMemory uses integer length
ret = avio_read_to_bprint(in, &buf, SIZE_MAX);
if (ret < 0 || !avio_feof(in)) {
av_log(log_ctx, AV_LOG_ERROR, "Cannot read IMF CPL\n");
if (ret == 0)
ret = AVERROR_INVALIDDATA;
goto clean_up;
}
LIBXML_TEST_VERSION
doc = xmlReadMemory(buf.str, buf.len, NULL, NULL, 0);
if (!doc) {
av_log(log_ctx,
AV_LOG_ERROR,
"XML parsing failed when reading the IMF CPL\n");
ret = AVERROR_INVALIDDATA;
goto clean_up;
}
if ((ret = ff_imf_parse_cpl_from_xml_dom(log_ctx, doc, cpl))) {
av_log(log_ctx, AV_LOG_ERROR, "Cannot parse IMF CPL\n");
} else {
av_log(log_ctx,
AV_LOG_INFO,
"IMF CPL ContentTitle: %s\n",
(*cpl)->content_title_utf8);
av_log(log_ctx,
AV_LOG_INFO,
"IMF CPL Id: " AV_PRI_UUID "\n",
AV_UUID_ARG((*cpl)->id_uuid));
}
xmlFreeDoc(doc);
clean_up:
av_bprint_finalize(&buf, NULL);
return ret;
}
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