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mxf_essence_helper.c
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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 "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;
CHK_ORET((essenceTrack = get_essence_track(reader->essenceReader, trackIndex)) != NULL);
if (essenceTrack->imageStartOffset != 0)
{
CHK_ORET(frameSize > essenceTrack->imageStartOffset);
/* experiments have shown that seeking or reading twice instead of reading once can
effect the disk access speed badly. Experiment with clip wrapped HD material (1920x1080 uncompressed)
has shown that doing a seek and read or 2 reads causes a bit rate reduction from 100 MB/s to 40 MB/s */