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mxf_essence_helper.c
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/*
* Utilities for processing essence data and associated metadata
*
* Copyright (C) 2006, British Broadcasting Corporation
* All Rights Reserved.
*
* Author: Philip de Nier
*
* 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.
* * Neither the name of the British Broadcasting Corporation nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 OWNER 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#include <inttypes.h>
#include "mxf_reader_int.h"
#include "mxf_essence_helper.h"
#include <mxf/mxf_avid.h>
#include <mxf/mxf_macros.h>
/* TODO: check for best effort distinguished values in incomplete header metadata */
/* TODO: handle frame size sequences for audio */
/* System item used in the BBC D3 preservation project. The system item contains a
local set item which has an array of 2 timecodes, VITC followed by LTC */
static const mxfKey g_SysItemElementKey1 = MXF_SS1_ELEMENT_KEY(0x01, 0x00);
static void convert_12m_to_timecode(uint8_t *t12m, int *isDropFrame,
uint8_t *hour, uint8_t *min, uint8_t *sec, uint8_t *frame)
{
*isDropFrame = (t12m[0] & 0x40) != 0;
*frame = ((t12m[0] >> 4) & 0x03) * 10 + (t12m[0] & 0x0f);
*sec = ((t12m[1] >> 4) & 0x07) * 10 + (t12m[1] & 0x0f);
*min = ((t12m[2] >> 4) & 0x07) * 10 + (t12m[2] & 0x0f);
*hour = ((t12m[3] >> 4) & 0x03) * 10 + (t12m[3] & 0x0f);
}
int is_d10_picture_essence(const mxfUL *label)
{
if (mxf_equals_ul(label, &MXF_EC_L(D10_50_625_50_picture_only)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_50_525_60_picture_only)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_40_625_50_picture_only)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_40_525_60_picture_only)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_30_625_50_picture_only)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_30_525_60_picture_only)))
{
return 1;
}
return 0;
}
int is_d10_essence(const mxfUL *label)
{
if (is_d10_picture_essence(label) ||
mxf_equals_ul(label, &MXF_EC_L(D10_50_625_50_defined_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_50_625_50_extended_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_50_525_60_defined_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_50_525_60_extended_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_40_625_50_defined_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_40_625_50_extended_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_40_525_60_defined_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_40_525_60_extended_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_30_625_50_defined_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_30_625_50_extended_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_30_525_60_defined_template)) ||
mxf_equals_ul(label, &MXF_EC_L(D10_30_525_60_extended_template)))
{
return 1;
}
return 0;
}
int process_cdci_descriptor(MXFMetadataSet *descriptorSet, MXFTrack *track, EssenceTrack *essenceTrack)
{
uint8_t frameLayout;
uint32_t fieldWidth;
uint32_t fieldHeight;
uint32_t displayWidth;
uint32_t displayHeight;
uint32_t displayXOffset;
uint32_t displayYOffset;
int32_t avidResolutionID;
int32_t avidFrameSize;
/* in some Avid files the essence container label extracted from the partition packs or Preface is more
useful, and the label will already have been set */
if (mxf_equals_ul(&track->essenceContainerLabel, &g_Null_UL))
{
CHK_ORET(mxf_get_ul_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, EssenceContainer), &track->essenceContainerLabel));
}
CHK_ORET(mxf_get_rational_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, SampleRate), &essenceTrack->sampleRate));
clean_rate(&essenceTrack->sampleRate);
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, ContainerDuration)))
{
CHK_ORET(mxf_get_length_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, ContainerDuration), &essenceTrack->containerDuration));
}
else
{
essenceTrack->containerDuration = -1;
}
/* Note: AspectRatio is best effort, with distinguished value (0,0) */
CHK_ORET(mxf_get_rational_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, AspectRatio), &track->video.aspectRatio));
/* Note: ComponentDepth is best effort */
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, ComponentDepth), &track->video.componentDepth));
CHK_ORET(track->video.componentDepth != 0);
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, SignalStandard)))
{
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, SignalStandard), &track->video.signalStandard));
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout)))
{
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout), &track->video.frameLayout));
}
else
{
track->video.frameLayout = 255; /* distinguished value */
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, PictureEssenceCoding)))
{
CHK_ORET(mxf_get_ul_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, PictureEssenceCoding), &track->pictureEssenceCodingLabel));
}
/* Avid extension: FirstFrameOffset is the offset from the start of the essence data element to the first frame */
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FirstFrameOffset)))
{
CHK_ORET(mxf_get_int32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FirstFrameOffset), &essenceTrack->avidFirstFrameOffset));
}
if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(IECDV_25_525_60_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(IECDV_25_525_60_FrameWrapped)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 240 * 2;
track->video.displayWidth = track->video.frameWidth;
track->video.displayHeight = track->video.frameHeight;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 4;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 120000;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(IECDV_25_625_50_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(IECDV_25_625_50_FrameWrapped)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 288 * 2;
track->video.displayWidth = track->video.frameWidth;
track->video.displayHeight = track->video.frameHeight;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 2;
essenceTrack->frameSize = 144000;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_25_525_60_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_25_525_60_FrameWrapped)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 240 * 2;
track->video.displayWidth = track->video.frameWidth;
track->video.displayHeight = track->video.frameHeight;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 4;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 120000;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_25_625_50_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_25_625_50_FrameWrapped)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 288 * 2;
track->video.displayWidth = track->video.frameWidth;
track->video.displayHeight = track->video.frameHeight;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 4;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 144000;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_50_525_60_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_50_525_60_FrameWrapped)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 240 * 2;
track->video.displayWidth = track->video.frameWidth;
track->video.displayHeight = track->video.frameHeight;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 240000;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_50_625_50_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_50_625_50_FrameWrapped)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 288 * 2;
track->video.displayWidth = track->video.frameWidth;
track->video.displayHeight = track->video.frameHeight;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 288000;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_50_625_50_defined_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_50_625_50_extended_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_50_625_50_picture_only)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidIMX50_625_50)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 304 * 2;
track->video.displayWidth = 720;
track->video.displayHeight = 288 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 16 * 2;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_50_525_60_defined_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_50_525_60_extended_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_50_525_60_picture_only)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidIMX50_525_60)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 256 * 2;
track->video.displayWidth = 720;
track->video.displayHeight = 243 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 13 * 2;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_40_625_50_defined_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_40_625_50_extended_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_40_625_50_picture_only)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidIMX40_625_50)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 304 * 2;
track->video.displayWidth = 720;
track->video.displayHeight = 288 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 16 * 2;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_40_525_60_defined_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_40_525_60_extended_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_40_525_60_picture_only)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidIMX40_525_60)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 256 * 2;
track->video.displayWidth = 720;
track->video.displayHeight = 243 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 13 * 2;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_30_625_50_defined_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_30_625_50_extended_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_30_625_50_picture_only)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidIMX30_625_50)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 304 * 2;
track->video.displayWidth = 720;
track->video.displayHeight = 288 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 16 * 2;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_30_525_60_defined_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_30_525_60_extended_template)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(D10_30_525_60_picture_only)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidIMX30_525_60)))
{
track->video.frameWidth = 720;
track->video.frameHeight = 256 * 2;
track->video.displayWidth = 720;
track->video.displayHeight = 243 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 13 * 2;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_1080_50_I_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_1080_50_I_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_1080_60_I_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_1080_60_I_FrameWrapped)))
{
track->video.frameHeight = 540 * 2;
track->video.displayWidth = 1920;
track->video.displayHeight = 540 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_1080_50_I_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_1080_50_I_FrameWrapped)))
{
track->video.frameWidth = 1440;
essenceTrack->frameSize = 576000;
}
else
{
track->video.frameWidth = 1280;
essenceTrack->frameSize = 480000;
}
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_720_50_P_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_720_50_P_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_720_60_P_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_720_60_P_FrameWrapped)))
{
track->video.frameWidth = 960;
track->video.frameHeight = 720;
track->video.displayWidth = 1280;
track->video.displayHeight = 720;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_720_50_P_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DVBased_100_720_50_P_FrameWrapped)))
{
essenceTrack->frameSize = 288000;
}
else
{
essenceTrack->frameSize = 240000;
}
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD1080i1242ClipWrapped)))
{
track->video.frameWidth = 1920;
track->video.frameHeight = 540 * 2;
track->video.displayWidth = 1920;
track->video.displayHeight = 540 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 606208;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD1080i1243ClipWrapped)))
{
track->video.frameWidth = 1920;
track->video.frameHeight = 540 * 2;
track->video.displayWidth = 1920;
track->video.displayHeight = 540 * 2;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 917504;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD1080p1237ClipWrapped)))
{
track->video.frameWidth = 1920;
track->video.frameHeight = 1080;
track->video.displayWidth = 1920;
track->video.displayHeight = 1080;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 606208;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD1080p1238ClipWrapped)))
{
track->video.frameWidth = 1920;
track->video.frameHeight = 1080;
track->video.displayWidth = 1920;
track->video.displayHeight = 1080;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 917504;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD1080p1253ClipWrapped)))
{
track->video.frameWidth = 1920;
track->video.frameHeight = 1080;
track->video.displayWidth = 1920;
track->video.displayHeight = 1080;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 188416;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD720p1252ClipWrapped)))
{
track->video.frameWidth = 1280;
track->video.frameHeight = 720;
track->video.displayWidth = 1280;
track->video.displayHeight = 720;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 303104;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(DNxHD720p1251ClipWrapped)))
{
track->video.frameWidth = 1280;
track->video.frameHeight = 720;
track->video.displayWidth = 1280;
track->video.displayHeight = 720;
track->video.displayXOffset = 0;
track->video.displayYOffset = 0;
track->video.horizSubsampling = 2;
track->video.vertSubsampling = 1;
essenceTrack->frameSize = 458752;
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(SD_Unc_625_50i_422_135_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(SD_Unc_625_50i_422_135_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(SD_Unc_525_5994i_422_135_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(SD_Unc_525_5994i_422_135_FrameWrapped)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredHeight), &fieldHeight));
if (fieldHeight == 0) /* best effort distinguished value */
{
fieldHeight = 0; /* TODO: how will players react to 0 ? */
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredWidth), &fieldWidth));
if (fieldWidth == 0) /* best effort distinguished value */
{
fieldWidth = 0; /* TODO: how will players react to 0 ? */
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight), &displayHeight));
}
else
{
displayHeight = fieldHeight;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth), &displayWidth));
}
else
{
displayWidth = fieldWidth;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset), &displayYOffset));
}
else
{
displayYOffset = 0;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset), &displayXOffset));
}
else
{
displayXOffset = 0;
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, HorizontalSubsampling), &track->video.horizSubsampling));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, VerticalSubsampling), &track->video.vertSubsampling));
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout), &frameLayout));
CHK_ORET(frameLayout == MXF_MIXED_FIELDS); /* TODO: only mixed fields supported for now */
track->video.frameWidth = fieldWidth;
track->video.frameHeight = fieldHeight;
track->video.displayWidth = displayWidth;
track->video.displayHeight = displayHeight;
track->video.displayXOffset = displayXOffset;
track->video.displayYOffset = displayYOffset;
/* check for Avid uncompressed data */
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ResolutionID)))
{
/* Only support 8-bit */
CHK_ORET(track->video.componentDepth == 8);
CHK_ORET(mxf_get_int32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ResolutionID), &avidResolutionID));
if (avidResolutionID == 0xaa) /* Avid 8-bit uncompressed UYVY */
{
/* get frame size and image start offset */
CHK_ORET(mxf_get_int32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize), &avidFrameSize));
CHK_ORET(avidFrameSize > 0);
essenceTrack->frameSize = avidFrameSize;
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ImageStartOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ImageStartOffset), &essenceTrack->imageStartOffset));
}
}
}
else
{
if (track->video.componentDepth == 8)
{
essenceTrack->frameSize = (uint32_t)(fieldWidth * fieldHeight *
(1 + 2.0 / (track->video.horizSubsampling * track->video.vertSubsampling)) + 0.5);
}
else
{
/* Only support 10-bit UYVY 4:2:2 */
CHK_ORET(mxf_equals_ul(&track->pictureEssenceCodingLabel, &MXF_CMDEF_L(UNC_10B_422_INTERLEAVED)));
CHK_ORET(fieldWidth % 48 == 0);
essenceTrack->frameSize = (uint32_t)(fieldWidth * 8 / 3 * fieldHeight);
}
}
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_50i_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_50i_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_5994i_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_5994i_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_25p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_25p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_2997p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_2997p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_30p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_30p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_50p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_50p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_5994p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_5994p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_60p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_1080_60p_422_ClipWrapped)))
{
CHK_ORET(track->video.componentDepth == 8 || track->video.componentDepth == 10);
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredHeight), &fieldHeight));
if (fieldHeight == 0) /* best effort distinguished value */
{
fieldHeight = 0; /* TODO: how will players react to 0 ? */
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredWidth), &fieldWidth));
if (fieldWidth == 0) /* best effort distinguished value */
{
fieldWidth = 0; /* TODO: how will players react to 0 ? */
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight), &displayHeight));
}
else
{
displayHeight = fieldHeight;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth), &displayWidth));
}
else
{
displayWidth = fieldWidth;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset), &displayYOffset));
}
else
{
displayYOffset = 0;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset), &displayXOffset));
}
else
{
displayXOffset = 0;
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, HorizontalSubsampling), &track->video.horizSubsampling));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, VerticalSubsampling), &track->video.vertSubsampling));
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout), &frameLayout));
CHK_ORET(frameLayout == MXF_MIXED_FIELDS || frameLayout == MXF_FULL_FRAME);
track->video.frameWidth = fieldWidth;
track->video.frameHeight = fieldHeight;
track->video.displayWidth = displayWidth;
track->video.displayHeight = displayHeight;
track->video.displayXOffset = displayXOffset;
track->video.displayYOffset = displayYOffset;
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize)))
{
CHK_ORET(mxf_get_int32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize), &avidFrameSize));
CHK_ORET(avidFrameSize > 0);
essenceTrack->frameSize = avidFrameSize;
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ImageStartOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ImageStartOffset), &essenceTrack->imageStartOffset));
}
}
else
{
if (track->video.componentDepth == 8)
{
essenceTrack->frameSize = (uint32_t)(fieldWidth * fieldHeight *
(1 + 2.0 / (track->video.horizSubsampling * track->video.vertSubsampling)) + 0.5);
}
else
{
/* Only support 10-bit UYVY 4:2:2 */
CHK_ORET(mxf_equals_ul(&track->pictureEssenceCodingLabel, &MXF_CMDEF_L(UNC_10B_422_INTERLEAVED)));
CHK_ORET(fieldWidth % 48 == 0);
essenceTrack->frameSize = (uint32_t)(fieldWidth * 8 / 3 * fieldHeight);
}
}
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_25p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_25p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_2997p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_2997p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_30p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_30p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_50p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_50p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_5994p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_5994p_422_ClipWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_60p_422_FrameWrapped)) ||
mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(HD_Unc_720_60p_422_ClipWrapped)))
{
CHK_ORET(track->video.componentDepth == 8 || track->video.componentDepth == 10);
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredHeight), &fieldHeight));
if (fieldHeight == 0) /* best effort distinguished value */
{
fieldHeight = 0; /* TODO: how will players react to 0 ? */
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredWidth), &fieldWidth));
if (fieldWidth == 0) /* best effort distinguished value */
{
fieldWidth = 0; /* TODO: how will players react to 0 ? */
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight), &displayHeight));
}
else
{
displayHeight = fieldHeight;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth), &displayWidth));
}
else
{
displayWidth = fieldWidth;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset), &displayYOffset));
}
else
{
displayYOffset = 0;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset), &displayXOffset));
}
else
{
displayXOffset = 0;
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, HorizontalSubsampling), &track->video.horizSubsampling));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, VerticalSubsampling), &track->video.vertSubsampling));
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout), &frameLayout));
CHK_ORET(frameLayout == MXF_FULL_FRAME);
track->video.frameWidth = fieldWidth;
track->video.frameHeight = fieldHeight;
track->video.displayWidth = displayWidth;
track->video.displayHeight = displayHeight;
track->video.displayXOffset = displayXOffset;
track->video.displayYOffset = displayYOffset;
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize)))
{
CHK_ORET(mxf_get_int32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize), &avidFrameSize));
CHK_ORET(avidFrameSize > 0);
essenceTrack->frameSize = avidFrameSize;
}
else
{
if (track->video.componentDepth == 8)
{
essenceTrack->frameSize = (uint32_t)(fieldWidth * fieldHeight *
(1 + 2.0 / (track->video.horizSubsampling * track->video.vertSubsampling)) + 0.5);
}
else
{
/* Only support 10-bit UYVY 4:2:2 */
CHK_ORET(mxf_equals_ul(&track->pictureEssenceCodingLabel, &MXF_CMDEF_L(UNC_10B_422_INTERLEAVED)));
CHK_ORET(fieldWidth % 48 == 0);
essenceTrack->frameSize = (uint32_t)(fieldWidth * 8 / 3 * fieldHeight);
}
}
}
else if (mxf_equals_ul(&track->essenceContainerLabel, &MXF_EC_L(AvidMJPEGClipWrapped)))
{
/* MJPEG is essentially a private Avid extension, so we can rely on observed MXF output from Avid */
/* e.g. Avid always outputs correct DisplayWidth/HeightX/YOffset properties for MJPEG */
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredHeight), &fieldHeight));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredWidth), &fieldWidth));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight), &displayHeight));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth), &displayWidth));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset), &displayYOffset));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset), &displayXOffset));
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout), &frameLayout));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, HorizontalSubsampling), &track->video.horizSubsampling));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, VerticalSubsampling), &track->video.vertSubsampling));
/* SeparateFields formats (2:1, 3:1, 10:1, 20:1) need to have their height doubled */
/* for display while OneField formats (2:1s, 15:1s, 4:1s, 10:1m, 4:1m) don't. */
int factor;
if (frameLayout == MXF_SEPARATE_FIELDS)
factor = 2;
else
factor = 1;
track->video.frameWidth = fieldWidth;
track->video.frameHeight = fieldHeight * factor;
track->video.displayWidth = displayWidth;
track->video.displayHeight = displayHeight * factor;
track->video.displayXOffset = displayXOffset;
track->video.displayYOffset = displayYOffset * 2;
essenceTrack->frameSize = -1; /* variable */
}
else if (mxf_is_avc_ec(&track->essenceContainerLabel, 0) ||
mxf_is_avc_ec(&track->essenceContainerLabel, 1))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredHeight), &fieldHeight));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, StoredWidth), &fieldWidth));
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayHeight), &displayHeight));
}
else
{
displayHeight = fieldHeight;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayWidth), &displayWidth));
}
else
{
displayWidth = fieldWidth;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayYOffset), &displayYOffset));
}
else
{
displayYOffset = 0;
}
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, DisplayXOffset), &displayXOffset));
}
else
{
displayXOffset = 0;
}
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, HorizontalSubsampling), &track->video.horizSubsampling));
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(CDCIEssenceDescriptor, VerticalSubsampling), &track->video.vertSubsampling));
CHK_ORET(mxf_get_uint8_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameLayout), &frameLayout));
int factor;
if (frameLayout == MXF_SEPARATE_FIELDS)
factor = 2;
else
factor = 1;
track->video.frameWidth = fieldWidth;
track->video.frameHeight = fieldHeight * factor;
track->video.displayWidth = displayWidth;
track->video.displayHeight = displayHeight * factor;
track->video.displayXOffset = displayXOffset;
track->video.displayYOffset = displayYOffset * factor;
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize)))
{
CHK_ORET(mxf_get_int32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, FrameSampleSize), &avidFrameSize));
CHK_ORET(avidFrameSize > 0);
essenceTrack->frameSize = avidFrameSize;
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ImageStartOffset)))
{
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericPictureEssenceDescriptor, ImageStartOffset), &essenceTrack->imageStartOffset));
}
}
else
{
/* frame size could be fixed or the first frame could be larger than the other frames */
essenceTrack->frameSize = -1;
}
}
else
{
mxf_log_error("Unsupported essence type" LOG_LOC_FORMAT, LOG_LOC_PARAMS);
return 0;
}
return 1;
}
int process_sound_descriptor(MXFMetadataSet *descriptorSet, MXFTrack *track, EssenceTrack *essenceTrack)
{
/* in some Avid files the essence container label extracted from the partition packs or Preface is more
useful, and the label will already have been set */
if (mxf_equals_ul(&track->essenceContainerLabel, &g_Null_UL))
{
CHK_ORET(mxf_get_ul_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, EssenceContainer), &track->essenceContainerLabel));
}
CHK_ORET(mxf_get_rational_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, SampleRate), &essenceTrack->sampleRate));
clean_rate(&essenceTrack->sampleRate);
if (mxf_have_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, ContainerDuration)))
{
CHK_ORET(mxf_get_length_item(descriptorSet, &MXF_ITEM_K(FileDescriptor, ContainerDuration), &essenceTrack->containerDuration));
}
else
{
essenceTrack->containerDuration = -1;
}
/* Note: AudioSamplingRate is best effort */
CHK_ORET(mxf_get_rational_item(descriptorSet, &MXF_ITEM_K(GenericSoundEssenceDescriptor, AudioSamplingRate), &track->audio.samplingRate));
CHK_ORET(track->audio.samplingRate.numerator != 0 && track->audio.samplingRate.denominator != 0);
/* Note: ChannelCount is best effort (distinguished value is 0) */
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericSoundEssenceDescriptor, ChannelCount), &track->audio.channelCount));
/* Note: QuantizationBits is best effort */
CHK_ORET(mxf_get_uint32_item(descriptorSet, &MXF_ITEM_K(GenericSoundEssenceDescriptor, QuantizationBits), &track->audio.bitsPerSample));
CHK_ORET(track->audio.bitsPerSample != 0);
/* TODO: mustn't assume PCM here */
track->audio.blockAlign = track->audio.channelCount * ((track->audio.bitsPerSample + 7) / 8);
essenceTrack->frameSize = -1;
return 1;
}
int process_wav_descriptor(MXFMetadataSet *descriptorSet, MXFTrack *track, EssenceTrack *essenceTrack)
{
CHK_ORET(process_sound_descriptor(descriptorSet, track, essenceTrack));
CHK_ORET(mxf_get_uint16_item(descriptorSet, &MXF_ITEM_K(WaveAudioDescriptor, BlockAlign), &track->audio.blockAlign));
essenceTrack->frameSize = (uint32_t)(track->audio.blockAlign *
track->audio.samplingRate.numerator * essenceTrack->frameRate.denominator /
(double)(track->audio.samplingRate.denominator * essenceTrack->frameRate.numerator));
return 1;
}
/* TODO: handle situations where data is not audio */
/* TODO: handle cases where channels are in different order (is this allowed?) */
int convert_aes_to_pcm(uint32_t channelCount, uint32_t bitsPerSample,
uint8_t *buffer, uint64_t aesDataLen, uint64_t *pcmDataLen)
{
uint16_t audioSampleCount = (buffer[2] << 8) | buffer[1];
uint8_t channelValidFlags = buffer[3];
uint32_t blockAlign = (bitsPerSample + 7) / 8;
uint8_t aes3ChannelCount = (channelValidFlags & 0x01) +
((channelValidFlags >> 1) & 0x01) +
((channelValidFlags >> 2) & 0x01) +
((channelValidFlags >> 3) & 0x01) +
((channelValidFlags >> 4) & 0x01) +
((channelValidFlags >> 5) & 0x01) +
((channelValidFlags >> 6) & 0x01) +
((channelValidFlags >> 7) & 0x01);
uint8_t *aesDataPtr;
uint8_t *pcmDataPtr;
uint16_t sampleNum;
uint8_t channel;
uint8_t validChannel;
CHK_ORET(channelCount <= aes3ChannelCount);
CHK_ORET(blockAlign == 2 || blockAlign == 3); /* only 16-bit to 24-bit sample size allowed */
CHK_ORET(audioSampleCount == (aesDataLen - 4) / (8 * 4)); /* 4 bytes per sample, 8 channels */
aesDataPtr = &buffer[4];
pcmDataPtr = &buffer[0];
for (sampleNum = 0; sampleNum < audioSampleCount; sampleNum++)
{
for (channel = 0, validChannel = 0; channel < 8 && validChannel < channelCount; channel++)
{
/* write audio channel if contains valid audio data */
if (channelValidFlags & (0x01 << channel))
{
/* write PCM word */
if (blockAlign == 2)
{
pcmDataPtr[0] = (aesDataPtr[1] >> 4) |
(aesDataPtr[2] << 4);
pcmDataPtr[1] = (aesDataPtr[2] >> 4) |
(aesDataPtr[3] << 4);
}
else
{
pcmDataPtr[0] = (aesDataPtr[0] >> 4) |
(aesDataPtr[1] << 4);
pcmDataPtr[1] = (aesDataPtr[1] >> 4) |
(aesDataPtr[2] << 4);
pcmDataPtr[2] = (aesDataPtr[2] >> 4) |
(aesDataPtr[3] << 4);
}
pcmDataPtr += blockAlign;
validChannel++;
}
aesDataPtr += 4 ; /* 4 bytes per sample */
}
aesDataPtr += (8 - channel) * 4; /* unused channels, 4 bytes per sample */
}
*pcmDataLen = pcmDataPtr - buffer;
return 1;
}
int accept_frame(MXFReaderListener *listener, int trackIndex)
{
if (listener && listener->accept_frame)
{
return listener->accept_frame(listener, trackIndex);
}
return 0;
}
int read_frame(MXFReader *reader, MXFReaderListener *listener, int trackIndex,
uint64_t frameSize, uint8_t **buffer, uint64_t *bufferSize)
{
MXFFile *mxfFile = reader->mxfFile;
EssenceTrack *essenceTrack;
uint8_t *newBuffer = NULL;
uint64_t newBufferSize;
/* The implementation below only supports a 32-bit frame size */
CHK_ORET(frameSize <= UINT32_MAX);
CHK_ORET((essenceTrack = get_essence_track(reader->essenceReader, trackIndex)) != NULL);
if (essenceTrack->imageStartOffset != 0)
{
CHK_ORET(frameSize > essenceTrack->imageStartOffset);