| // Copyright 2019 Joe Drago. All rights reserved. |
| // SPDX-License-Identifier: BSD-2-Clause |
| |
| #include "avif/internal.h" |
| |
| #include <assert.h> |
| #include <string.h> |
| #include <time.h> |
| |
| #define MAX_ASSOCIATIONS 16 |
| struct ipmaArray |
| { |
| uint8_t associations[MAX_ASSOCIATIONS]; |
| avifBool essential[MAX_ASSOCIATIONS]; |
| uint8_t count; |
| }; |
| static void ipmaPush(struct ipmaArray * ipma, uint8_t assoc, avifBool essential) |
| { |
| ipma->associations[ipma->count] = assoc; |
| ipma->essential[ipma->count] = essential; |
| ++ipma->count; |
| } |
| |
| // Used to store offsets in meta boxes which need to point at mdat offsets that |
| // aren't known yet. When an item's mdat payload is written, all registered fixups |
| // will have this now-known offset "fixed up". |
| typedef struct avifOffsetFixup |
| { |
| size_t offset; |
| } avifOffsetFixup; |
| AVIF_ARRAY_DECLARE(avifOffsetFixupArray, avifOffsetFixup, fixup); |
| |
| static const char alphaURN[] = URN_ALPHA0; |
| static const size_t alphaURNSize = sizeof(alphaURN); |
| |
| static const char xmpContentType[] = CONTENT_TYPE_XMP; |
| static const size_t xmpContentTypeSize = sizeof(xmpContentType); |
| |
| static avifBool avifImageIsOpaque(const avifImage * image); |
| static void writeConfigBox(avifRWStream * s, avifCodecConfigurationBox * cfg); |
| |
| // --------------------------------------------------------------------------- |
| // avifCodecEncodeOutput |
| |
| avifCodecEncodeOutput * avifCodecEncodeOutputCreate(void) |
| { |
| avifCodecEncodeOutput * encodeOutput = (avifCodecEncodeOutput *)avifAlloc(sizeof(avifCodecEncodeOutput)); |
| memset(encodeOutput, 0, sizeof(avifCodecEncodeOutput)); |
| avifArrayCreate(&encodeOutput->samples, sizeof(avifEncodeSample), 1); |
| return encodeOutput; |
| } |
| |
| void avifCodecEncodeOutputAddSample(avifCodecEncodeOutput * encodeOutput, const uint8_t * data, size_t len, avifBool sync) |
| { |
| avifEncodeSample * sample = (avifEncodeSample *)avifArrayPushPtr(&encodeOutput->samples); |
| avifRWDataSet(&sample->data, data, len); |
| sample->sync = sync; |
| } |
| |
| void avifCodecEncodeOutputDestroy(avifCodecEncodeOutput * encodeOutput) |
| { |
| for (uint32_t sampleIndex = 0; sampleIndex < encodeOutput->samples.count; ++sampleIndex) { |
| avifRWDataFree(&encodeOutput->samples.sample[sampleIndex].data); |
| } |
| avifArrayDestroy(&encodeOutput->samples); |
| avifFree(encodeOutput); |
| } |
| |
| // --------------------------------------------------------------------------- |
| // avifEncoderItem |
| |
| // one "item" worth for encoder |
| typedef struct avifEncoderItem |
| { |
| uint16_t id; |
| uint8_t type[4]; |
| avifCodec * codec; // only present on type==av01 |
| avifCodecEncodeOutput * encodeOutput; // AV1 sample data |
| avifRWData metadataPayload; // Exif/XMP data |
| avifCodecConfigurationBox av1C; // Harvested in avifEncoderFinish(), if encodeOutput has samples |
| uint32_t cellIndex; // Which row-major cell index corresponds to this item. ignored on non-av01 types |
| avifBool alpha; |
| |
| const char * infeName; |
| size_t infeNameSize; |
| const char * infeContentType; |
| size_t infeContentTypeSize; |
| avifOffsetFixupArray mdatFixups; |
| |
| uint16_t irefToID; // if non-zero, make an iref from this id -> irefToID |
| const char * irefType; |
| |
| uint32_t gridCols; // if non-zero (legal range [1-256]), this is a grid item |
| uint32_t gridRows; // if non-zero (legal range [1-256]), this is a grid item |
| |
| uint16_t dimgFromID; // if non-zero, make an iref from dimgFromID -> this id |
| |
| struct ipmaArray ipma; |
| } avifEncoderItem; |
| AVIF_ARRAY_DECLARE(avifEncoderItemArray, avifEncoderItem, item); |
| |
| // --------------------------------------------------------------------------- |
| // avifEncoderFrame |
| |
| typedef struct avifEncoderFrame |
| { |
| uint64_t durationInTimescales; |
| } avifEncoderFrame; |
| AVIF_ARRAY_DECLARE(avifEncoderFrameArray, avifEncoderFrame, frame); |
| |
| // --------------------------------------------------------------------------- |
| // avifEncoderData |
| |
| typedef struct avifEncoderData |
| { |
| avifEncoderItemArray items; |
| avifEncoderFrameArray frames; |
| avifImage * imageMetadata; |
| uint16_t lastItemID; |
| uint16_t primaryItemID; |
| avifBool singleImage; // if true, the AVIF_ADD_IMAGE_FLAG_SINGLE flag was set on the first call to avifEncoderAddImage() |
| avifBool alphaPresent; |
| } avifEncoderData; |
| |
| static avifEncoderData * avifEncoderDataCreate() |
| { |
| avifEncoderData * data = (avifEncoderData *)avifAlloc(sizeof(avifEncoderData)); |
| memset(data, 0, sizeof(avifEncoderData)); |
| data->imageMetadata = avifImageCreateEmpty(); |
| avifArrayCreate(&data->items, sizeof(avifEncoderItem), 8); |
| avifArrayCreate(&data->frames, sizeof(avifEncoderFrame), 1); |
| return data; |
| } |
| |
| static avifEncoderItem * avifEncoderDataCreateItem(avifEncoderData * data, const char * type, const char * infeName, size_t infeNameSize, uint32_t cellIndex) |
| { |
| avifEncoderItem * item = (avifEncoderItem *)avifArrayPushPtr(&data->items); |
| ++data->lastItemID; |
| item->id = data->lastItemID; |
| memcpy(item->type, type, sizeof(item->type)); |
| item->infeName = infeName; |
| item->infeNameSize = infeNameSize; |
| item->encodeOutput = avifCodecEncodeOutputCreate(); |
| item->cellIndex = cellIndex; |
| avifArrayCreate(&item->mdatFixups, sizeof(avifOffsetFixup), 4); |
| return item; |
| } |
| |
| static avifEncoderItem * avifEncoderDataFindItemByID(avifEncoderData * data, uint16_t id) |
| { |
| for (uint32_t itemIndex = 0; itemIndex < data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &data->items.item[itemIndex]; |
| if (item->id == id) { |
| return item; |
| } |
| } |
| return NULL; |
| } |
| |
| static void avifEncoderDataDestroy(avifEncoderData * data) |
| { |
| for (uint32_t i = 0; i < data->items.count; ++i) { |
| avifEncoderItem * item = &data->items.item[i]; |
| if (item->codec) { |
| avifCodecDestroy(item->codec); |
| } |
| avifCodecEncodeOutputDestroy(item->encodeOutput); |
| avifRWDataFree(&item->metadataPayload); |
| avifArrayDestroy(&item->mdatFixups); |
| } |
| avifImageDestroy(data->imageMetadata); |
| avifArrayDestroy(&data->items); |
| avifArrayDestroy(&data->frames); |
| avifFree(data); |
| } |
| |
| static void avifEncoderItemAddMdatFixup(avifEncoderItem * item, const avifRWStream * s) |
| { |
| avifOffsetFixup * fixup = (avifOffsetFixup *)avifArrayPushPtr(&item->mdatFixups); |
| fixup->offset = avifRWStreamOffset(s); |
| } |
| |
| // --------------------------------------------------------------------------- |
| |
| avifEncoder * avifEncoderCreate(void) |
| { |
| avifEncoder * encoder = (avifEncoder *)avifAlloc(sizeof(avifEncoder)); |
| memset(encoder, 0, sizeof(avifEncoder)); |
| encoder->maxThreads = 1; |
| encoder->minQuantizer = AVIF_QUANTIZER_LOSSLESS; |
| encoder->maxQuantizer = AVIF_QUANTIZER_LOSSLESS; |
| encoder->minQuantizerAlpha = AVIF_QUANTIZER_LOSSLESS; |
| encoder->maxQuantizerAlpha = AVIF_QUANTIZER_LOSSLESS; |
| encoder->tileRowsLog2 = 0; |
| encoder->tileColsLog2 = 0; |
| encoder->speed = AVIF_SPEED_DEFAULT; |
| encoder->keyframeInterval = 0; |
| encoder->timescale = 1; |
| encoder->data = avifEncoderDataCreate(); |
| encoder->csOptions = avifCodecSpecificOptionsCreate(); |
| return encoder; |
| } |
| |
| void avifEncoderDestroy(avifEncoder * encoder) |
| { |
| avifCodecSpecificOptionsDestroy(encoder->csOptions); |
| avifEncoderDataDestroy(encoder->data); |
| avifFree(encoder); |
| } |
| |
| void avifEncoderSetCodecSpecificOption(avifEncoder * encoder, const char * key, const char * value) |
| { |
| avifCodecSpecificOptionsSet(encoder->csOptions, key, value); |
| } |
| |
| static void avifEncoderWriteColorProperties(avifRWStream * s, const avifImage * imageMetadata, struct ipmaArray * ipma, uint8_t * itemPropertyIndex) |
| { |
| if (imageMetadata->icc.size > 0) { |
| avifBoxMarker colr = avifRWStreamWriteBox(s, "colr", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteChars(s, "prof", 4); // unsigned int(32) colour_type; |
| avifRWStreamWrite(s, imageMetadata->icc.data, imageMetadata->icc.size); |
| avifRWStreamFinishBox(s, colr); |
| if (ipma && itemPropertyIndex) { |
| ipmaPush(ipma, ++(*itemPropertyIndex), AVIF_FALSE); |
| } |
| } |
| |
| // HEIF 6.5.5.1, from Amendment 3 allows multiple colr boxes: "at most one for a given value of colour type" |
| // Therefore, *always* writing an nclx box, even if an a prof box was already written above. |
| avifBoxMarker colr = avifRWStreamWriteBox(s, "colr", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteChars(s, "nclx", 4); // unsigned int(32) colour_type; |
| avifRWStreamWriteU16(s, (uint16_t)imageMetadata->colorPrimaries); // unsigned int(16) colour_primaries; |
| avifRWStreamWriteU16(s, (uint16_t)imageMetadata->transferCharacteristics); // unsigned int(16) transfer_characteristics; |
| avifRWStreamWriteU16(s, (uint16_t)imageMetadata->matrixCoefficients); // unsigned int(16) matrix_coefficients; |
| avifRWStreamWriteU8(s, (imageMetadata->yuvRange == AVIF_RANGE_FULL) ? 0x80 : 0); // unsigned int(1) full_range_flag; |
| // unsigned int(7) reserved = 0; |
| avifRWStreamFinishBox(s, colr); |
| if (ipma && itemPropertyIndex) { |
| ipmaPush(ipma, ++(*itemPropertyIndex), AVIF_FALSE); |
| } |
| |
| // Write (Optional) Transformations |
| if (imageMetadata->transformFlags & AVIF_TRANSFORM_PASP) { |
| avifBoxMarker pasp = avifRWStreamWriteBox(s, "pasp", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteU32(s, imageMetadata->pasp.hSpacing); // unsigned int(32) hSpacing; |
| avifRWStreamWriteU32(s, imageMetadata->pasp.vSpacing); // unsigned int(32) vSpacing; |
| avifRWStreamFinishBox(s, pasp); |
| if (ipma && itemPropertyIndex) { |
| ipmaPush(ipma, ++(*itemPropertyIndex), AVIF_FALSE); |
| } |
| } |
| if (imageMetadata->transformFlags & AVIF_TRANSFORM_CLAP) { |
| avifBoxMarker clap = avifRWStreamWriteBox(s, "clap", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteU32(s, imageMetadata->clap.widthN); // unsigned int(32) cleanApertureWidthN; |
| avifRWStreamWriteU32(s, imageMetadata->clap.widthD); // unsigned int(32) cleanApertureWidthD; |
| avifRWStreamWriteU32(s, imageMetadata->clap.heightN); // unsigned int(32) cleanApertureHeightN; |
| avifRWStreamWriteU32(s, imageMetadata->clap.heightD); // unsigned int(32) cleanApertureHeightD; |
| avifRWStreamWriteU32(s, imageMetadata->clap.horizOffN); // unsigned int(32) horizOffN; |
| avifRWStreamWriteU32(s, imageMetadata->clap.horizOffD); // unsigned int(32) horizOffD; |
| avifRWStreamWriteU32(s, imageMetadata->clap.vertOffN); // unsigned int(32) vertOffN; |
| avifRWStreamWriteU32(s, imageMetadata->clap.vertOffD); // unsigned int(32) vertOffD; |
| avifRWStreamFinishBox(s, clap); |
| if (ipma && itemPropertyIndex) { |
| ipmaPush(ipma, ++(*itemPropertyIndex), AVIF_TRUE); |
| } |
| } |
| if (imageMetadata->transformFlags & AVIF_TRANSFORM_IROT) { |
| avifBoxMarker irot = avifRWStreamWriteBox(s, "irot", AVIF_BOX_SIZE_TBD); |
| uint8_t angle = imageMetadata->irot.angle & 0x3; |
| avifRWStreamWrite(s, &angle, 1); // unsigned int (6) reserved = 0; unsigned int (2) angle; |
| avifRWStreamFinishBox(s, irot); |
| if (ipma && itemPropertyIndex) { |
| ipmaPush(ipma, ++(*itemPropertyIndex), AVIF_TRUE); |
| } |
| } |
| if (imageMetadata->transformFlags & AVIF_TRANSFORM_IMIR) { |
| avifBoxMarker imir = avifRWStreamWriteBox(s, "imir", AVIF_BOX_SIZE_TBD); |
| uint8_t axis = imageMetadata->imir.axis & 0x1; |
| avifRWStreamWrite(s, &axis, 1); // unsigned int (7) reserved = 0; unsigned int (1) axis; |
| avifRWStreamFinishBox(s, imir); |
| if (ipma && itemPropertyIndex) { |
| ipmaPush(ipma, ++(*itemPropertyIndex), AVIF_TRUE); |
| } |
| } |
| } |
| |
| // Write unassociated metadata items (EXIF, XMP) to a small meta box inside of a trak box. |
| // These items are implicitly associated with the track they are contained within. |
| static void avifEncoderWriteTrackMetaBox(avifEncoder * encoder, avifRWStream * s) |
| { |
| // Count how many non-av01 items (such as EXIF/XMP) are being written |
| uint32_t metadataItemCount = 0; |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (memcmp(item->type, "av01", 4) != 0) { |
| ++metadataItemCount; |
| } |
| } |
| if (metadataItemCount == 0) { |
| // Don't even bother writing the trak meta box |
| return; |
| } |
| |
| avifBoxMarker meta = avifRWStreamWriteFullBox(s, "meta", AVIF_BOX_SIZE_TBD, 0, 0); |
| |
| avifBoxMarker hdlr = avifRWStreamWriteFullBox(s, "hdlr", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(s, 0); // unsigned int(32) pre_defined = 0; |
| avifRWStreamWriteChars(s, "pict", 4); // unsigned int(32) handler_type; |
| avifRWStreamWriteZeros(s, 12); // const unsigned int(32)[3] reserved = 0; |
| avifRWStreamWriteChars(s, "libavif", 8); // string name; (writing null terminator) |
| avifRWStreamFinishBox(s, hdlr); |
| |
| avifBoxMarker iloc = avifRWStreamWriteFullBox(s, "iloc", AVIF_BOX_SIZE_TBD, 0, 0); |
| uint8_t offsetSizeAndLengthSize = (4 << 4) + (4 << 0); // unsigned int(4) offset_size; |
| // unsigned int(4) length_size; |
| avifRWStreamWrite(s, &offsetSizeAndLengthSize, 1); // |
| avifRWStreamWriteZeros(s, 1); // unsigned int(4) base_offset_size; |
| // unsigned int(4) reserved; |
| avifRWStreamWriteU16(s, (uint16_t)metadataItemCount); // unsigned int(16) item_count; |
| for (uint32_t trakItemIndex = 0; trakItemIndex < encoder->data->items.count; ++trakItemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[trakItemIndex]; |
| if (memcmp(item->type, "av01", 4) == 0) { |
| // Skip over all non-metadata items |
| continue; |
| } |
| |
| avifRWStreamWriteU16(s, item->id); // unsigned int(16) item_ID; |
| avifRWStreamWriteU16(s, 0); // unsigned int(16) data_reference_index; |
| avifRWStreamWriteU16(s, 1); // unsigned int(16) extent_count; |
| avifEncoderItemAddMdatFixup(item, s); // |
| avifRWStreamWriteU32(s, 0 /* set later */); // unsigned int(offset_size*8) extent_offset; |
| avifRWStreamWriteU32(s, (uint32_t)item->metadataPayload.size); // unsigned int(length_size*8) extent_length; |
| } |
| avifRWStreamFinishBox(s, iloc); |
| |
| avifBoxMarker iinf = avifRWStreamWriteFullBox(s, "iinf", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU16(s, (uint16_t)metadataItemCount); // unsigned int(16) entry_count; |
| for (uint32_t trakItemIndex = 0; trakItemIndex < encoder->data->items.count; ++trakItemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[trakItemIndex]; |
| if (memcmp(item->type, "av01", 4) == 0) { |
| continue; |
| } |
| |
| avifBoxMarker infe = avifRWStreamWriteFullBox(s, "infe", AVIF_BOX_SIZE_TBD, 2, 0); |
| avifRWStreamWriteU16(s, item->id); // unsigned int(16) item_ID; |
| avifRWStreamWriteU16(s, 0); // unsigned int(16) item_protection_index; |
| avifRWStreamWrite(s, item->type, 4); // unsigned int(32) item_type; |
| avifRWStreamWriteChars(s, item->infeName, item->infeNameSize); // string item_name; (writing null terminator) |
| if (item->infeContentType && item->infeContentTypeSize) { // string content_type; (writing null terminator) |
| avifRWStreamWriteChars(s, item->infeContentType, item->infeContentTypeSize); |
| } |
| avifRWStreamFinishBox(s, infe); |
| } |
| avifRWStreamFinishBox(s, iinf); |
| |
| avifRWStreamFinishBox(s, meta); |
| } |
| |
| static void avifWriteGridPayload(avifRWData * data, uint32_t gridCols, uint32_t gridRows, const avifImage * firstCell) |
| { |
| // ISO/IEC 23008-12 6.6.2.3.2 |
| // aligned(8) class ImageGrid { |
| // unsigned int(8) version = 0; |
| // unsigned int(8) flags; |
| // FieldLength = ((flags & 1) + 1) * 16; |
| // unsigned int(8) rows_minus_one; |
| // unsigned int(8) columns_minus_one; |
| // unsigned int(FieldLength) output_width; |
| // unsigned int(FieldLength) output_height; |
| // } |
| |
| uint32_t gridWidth = firstCell->width * gridCols; |
| uint32_t gridHeight = firstCell->height * gridRows; |
| uint8_t gridFlags = ((gridWidth > 65535) || (gridHeight > 65535)) ? 1 : 0; |
| |
| avifRWStream s; |
| avifRWStreamStart(&s, data); |
| avifRWStreamWriteU8(&s, 0); // unsigned int(8) version = 0; |
| avifRWStreamWriteU8(&s, gridFlags); // unsigned int(8) flags; |
| avifRWStreamWriteU8(&s, (uint8_t)(gridRows - 1)); // unsigned int(8) rows_minus_one; |
| avifRWStreamWriteU8(&s, (uint8_t)(gridCols - 1)); // unsigned int(8) columns_minus_one; |
| if (gridFlags & 1) { |
| avifRWStreamWriteU32(&s, gridWidth); // unsigned int(FieldLength) output_width; |
| avifRWStreamWriteU32(&s, gridHeight); // unsigned int(FieldLength) output_height; |
| } else { |
| uint16_t tmpWidth = (uint16_t)gridWidth; |
| uint16_t tmpHeight = (uint16_t)gridHeight; |
| avifRWStreamWriteU16(&s, tmpWidth); // unsigned int(FieldLength) output_width; |
| avifRWStreamWriteU16(&s, tmpHeight); // unsigned int(FieldLength) output_height; |
| } |
| avifRWStreamFinishWrite(&s); |
| } |
| |
| static avifResult avifEncoderAddImageInternal(avifEncoder * encoder, |
| uint32_t gridCols, |
| uint32_t gridRows, |
| const avifImage * const * cellImages, |
| uint64_t durationInTimescales, |
| uint32_t addImageFlags) |
| { |
| // ----------------------------------------------------------------------- |
| // Verify encoding is possible |
| |
| if (!avifCodecName(encoder->codecChoice, AVIF_CODEC_FLAG_CAN_ENCODE)) { |
| return AVIF_RESULT_NO_CODEC_AVAILABLE; |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Validate images |
| |
| const uint32_t cellCount = gridCols * gridRows; |
| if (cellCount == 0) { |
| return AVIF_RESULT_INVALID_ARGUMENT; |
| } |
| |
| const avifImage * firstCell = cellImages[0]; |
| if ((firstCell->depth != 8) && (firstCell->depth != 10) && (firstCell->depth != 12)) { |
| return AVIF_RESULT_UNSUPPORTED_DEPTH; |
| } |
| |
| if (!firstCell->width || !firstCell->height) { |
| return AVIF_RESULT_NO_CONTENT; |
| } |
| |
| if ((cellCount > 1) && ((firstCell->width < 64) || (firstCell->height < 64))) { |
| return AVIF_RESULT_INVALID_IMAGE_GRID; |
| } |
| |
| for (uint32_t cellIndex = 0; cellIndex < cellCount; ++cellIndex) { |
| const avifImage * cellImage = cellImages[cellIndex]; |
| if ((cellImage->depth != firstCell->depth) || (cellImage->width != firstCell->width) || |
| (cellImage->height != firstCell->height) || (!!cellImage->alphaPlane != !!firstCell->alphaPlane) || |
| (cellImage->alphaPremultiplied != firstCell->alphaPremultiplied)) { |
| return AVIF_RESULT_INVALID_IMAGE_GRID; |
| } |
| |
| if (!cellImage->yuvPlanes[AVIF_CHAN_Y]) { |
| return AVIF_RESULT_NO_CONTENT; |
| } |
| |
| if (cellImage->yuvFormat == AVIF_PIXEL_FORMAT_NONE) { |
| return AVIF_RESULT_NO_YUV_FORMAT_SELECTED; |
| } |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Validate flags |
| |
| if (encoder->data->singleImage) { |
| // The previous call to avifEncoderAddImage() set AVIF_ADD_IMAGE_FLAG_SINGLE. |
| // avifEncoderAddImage() cannot be called again for this encode. |
| return AVIF_RESULT_ENCODE_COLOR_FAILED; |
| } |
| |
| if (addImageFlags & AVIF_ADD_IMAGE_FLAG_SINGLE) { |
| encoder->data->singleImage = AVIF_TRUE; |
| |
| if (encoder->data->items.count > 0) { |
| // AVIF_ADD_IMAGE_FLAG_SINGLE may only be set on the first and only image. |
| return AVIF_RESULT_INVALID_ARGUMENT; |
| } |
| } |
| |
| // ----------------------------------------------------------------------- |
| |
| if (durationInTimescales == 0) { |
| durationInTimescales = 1; |
| } |
| |
| if (encoder->data->items.count == 0) { |
| // Make a copy of the first image's metadata (sans pixels) for future writing/validation |
| avifImageCopy(encoder->data->imageMetadata, firstCell, 0); |
| |
| // Prepare all AV1 items |
| |
| uint16_t gridColorID = 0; |
| if (cellCount > 1) { |
| avifEncoderItem * gridColorItem = avifEncoderDataCreateItem(encoder->data, "grid", "Color", 6, 0); |
| avifWriteGridPayload(&gridColorItem->metadataPayload, gridCols, gridRows, firstCell); |
| gridColorItem->gridCols = gridCols; |
| gridColorItem->gridRows = gridRows; |
| |
| gridColorID = gridColorItem->id; |
| encoder->data->primaryItemID = gridColorID; |
| } |
| |
| for (uint32_t cellIndex = 0; cellIndex < cellCount; ++cellIndex) { |
| avifEncoderItem * item = avifEncoderDataCreateItem(encoder->data, "av01", "Color", 6, cellIndex); |
| item->codec = avifCodecCreate(encoder->codecChoice, AVIF_CODEC_FLAG_CAN_ENCODE); |
| if (!item->codec) { |
| // Just bail out early, we're not surviving this function without an encoder compiled in |
| return AVIF_RESULT_NO_CODEC_AVAILABLE; |
| } |
| item->codec->csOptions = encoder->csOptions; |
| |
| if (cellCount > 1) { |
| item->dimgFromID = gridColorID; |
| } else { |
| encoder->data->primaryItemID = item->id; |
| } |
| } |
| |
| encoder->data->alphaPresent = (firstCell->alphaPlane != NULL); |
| if (encoder->data->alphaPresent && (addImageFlags & AVIF_ADD_IMAGE_FLAG_SINGLE)) { |
| // If encoding a single image in which the alpha plane exists but is entirely opaque, |
| // simply skip writing an alpha AV1 payload entirely, as it'll be interpreted as opaque |
| // and is less bytes. |
| // |
| // However, if encoding an image sequence, the first frame's alpha plane being entirely |
| // opaque could be a false positive for removing the alpha AV1 payload, as it might simply |
| // be a fade out later in the sequence. This is why avifImageIsOpaque() is only called |
| // when encoding a single image. |
| |
| encoder->data->alphaPresent = AVIF_FALSE; |
| for (uint32_t cellIndex = 0; cellIndex < cellCount; ++cellIndex) { |
| const avifImage * cellImage = cellImages[cellIndex]; |
| if (!avifImageIsOpaque(cellImage)) { |
| encoder->data->alphaPresent = AVIF_TRUE; |
| break; |
| } |
| } |
| } |
| |
| if (encoder->data->alphaPresent) { |
| uint16_t gridAlphaID = 0; |
| if (cellCount > 1) { |
| avifEncoderItem * gridAlphaItem = avifEncoderDataCreateItem(encoder->data, "grid", "Alpha", 6, 0); |
| avifWriteGridPayload(&gridAlphaItem->metadataPayload, gridCols, gridRows, firstCell); |
| gridAlphaItem->alpha = AVIF_TRUE; |
| gridAlphaItem->irefToID = encoder->data->primaryItemID; |
| gridAlphaItem->irefType = "auxl"; |
| gridAlphaItem->gridCols = gridCols; |
| gridAlphaItem->gridRows = gridRows; |
| gridAlphaID = gridAlphaItem->id; |
| |
| if (encoder->data->imageMetadata->alphaPremultiplied) { |
| avifEncoderItem * primaryItem = avifEncoderDataFindItemByID(encoder->data, encoder->data->primaryItemID); |
| assert(primaryItem); |
| primaryItem->irefType = "prem"; |
| primaryItem->irefToID = gridAlphaID; |
| } |
| } |
| |
| for (uint32_t cellIndex = 0; cellIndex < cellCount; ++cellIndex) { |
| avifEncoderItem * item = avifEncoderDataCreateItem(encoder->data, "av01", "Alpha", 6, cellIndex); |
| item->codec = avifCodecCreate(encoder->codecChoice, AVIF_CODEC_FLAG_CAN_ENCODE); |
| if (!item->codec) { |
| return AVIF_RESULT_NO_CODEC_AVAILABLE; |
| } |
| item->codec->csOptions = encoder->csOptions; |
| item->alpha = AVIF_TRUE; |
| |
| if (cellCount > 1) { |
| item->dimgFromID = gridAlphaID; |
| } else { |
| item->irefToID = encoder->data->primaryItemID; |
| item->irefType = "auxl"; |
| |
| if (encoder->data->imageMetadata->alphaPremultiplied) { |
| avifEncoderItem * primaryItem = avifEncoderDataFindItemByID(encoder->data, encoder->data->primaryItemID); |
| assert(primaryItem); |
| primaryItem->irefType = "prem"; |
| primaryItem->irefToID = item->id; |
| } |
| } |
| } |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Create metadata items (Exif, XMP) |
| |
| if (firstCell->exif.size > 0) { |
| // Validate Exif payload (if any) and find TIFF header offset |
| uint32_t exifTiffHeaderOffset = 0; |
| if (firstCell->exif.size < 4) { |
| // Can't even fit the TIFF header, something is wrong |
| return AVIF_RESULT_INVALID_EXIF_PAYLOAD; |
| } |
| |
| const uint8_t tiffHeaderBE[4] = { 'M', 'M', 0, 42 }; |
| const uint8_t tiffHeaderLE[4] = { 'I', 'I', 42, 0 }; |
| for (; exifTiffHeaderOffset < (firstCell->exif.size - 4); ++exifTiffHeaderOffset) { |
| if (!memcmp(&firstCell->exif.data[exifTiffHeaderOffset], tiffHeaderBE, sizeof(tiffHeaderBE))) { |
| break; |
| } |
| if (!memcmp(&firstCell->exif.data[exifTiffHeaderOffset], tiffHeaderLE, sizeof(tiffHeaderLE))) { |
| break; |
| } |
| } |
| |
| if (exifTiffHeaderOffset >= firstCell->exif.size - 4) { |
| // Couldn't find the TIFF header |
| return AVIF_RESULT_INVALID_EXIF_PAYLOAD; |
| } |
| |
| avifEncoderItem * exifItem = avifEncoderDataCreateItem(encoder->data, "Exif", "Exif", 5, 0); |
| exifItem->irefToID = encoder->data->primaryItemID; |
| exifItem->irefType = "cdsc"; |
| |
| avifRWDataRealloc(&exifItem->metadataPayload, sizeof(uint32_t) + firstCell->exif.size); |
| exifTiffHeaderOffset = avifHTONL(exifTiffHeaderOffset); |
| memcpy(exifItem->metadataPayload.data, &exifTiffHeaderOffset, sizeof(uint32_t)); |
| memcpy(exifItem->metadataPayload.data + sizeof(uint32_t), firstCell->exif.data, firstCell->exif.size); |
| } |
| |
| if (firstCell->xmp.size > 0) { |
| avifEncoderItem * xmpItem = avifEncoderDataCreateItem(encoder->data, "mime", "XMP", 4, 0); |
| xmpItem->irefToID = encoder->data->primaryItemID; |
| xmpItem->irefType = "cdsc"; |
| |
| xmpItem->infeContentType = xmpContentType; |
| xmpItem->infeContentTypeSize = xmpContentTypeSize; |
| avifRWDataSet(&xmpItem->metadataPayload, firstCell->xmp.data, firstCell->xmp.size); |
| } |
| } else { |
| // Another frame in an image sequence |
| |
| if (encoder->data->alphaPresent && !firstCell->alphaPlane) { |
| // If the first image in the sequence had an alpha plane (even if fully opaque), all |
| // subsequence images must have alpha as well. |
| return AVIF_RESULT_ENCODE_ALPHA_FAILED; |
| } |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Encode AV1 OBUs |
| |
| if (encoder->keyframeInterval && ((encoder->data->frames.count % encoder->keyframeInterval) == 0)) { |
| addImageFlags |= AVIF_ADD_IMAGE_FLAG_FORCE_KEYFRAME; |
| } |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (item->codec) { |
| const avifImage * cellImage = cellImages[item->cellIndex]; |
| avifResult encodeResult = |
| item->codec->encodeImage(item->codec, encoder, cellImage, item->alpha, addImageFlags, item->encodeOutput); |
| if (encodeResult == AVIF_RESULT_UNKNOWN_ERROR) { |
| encodeResult = item->alpha ? AVIF_RESULT_ENCODE_ALPHA_FAILED : AVIF_RESULT_ENCODE_COLOR_FAILED; |
| } |
| if (encodeResult != AVIF_RESULT_OK) { |
| return encodeResult; |
| } |
| } |
| } |
| |
| avifEncoderFrame * frame = (avifEncoderFrame *)avifArrayPushPtr(&encoder->data->frames); |
| frame->durationInTimescales = durationInTimescales; |
| return AVIF_RESULT_OK; |
| } |
| |
| avifResult avifEncoderAddImage(avifEncoder * encoder, const avifImage * image, uint64_t durationInTimescales, uint32_t addImageFlags) |
| { |
| return avifEncoderAddImageInternal(encoder, 1, 1, &image, durationInTimescales, addImageFlags); |
| } |
| |
| avifResult avifEncoderAddImageGrid(avifEncoder * encoder, uint32_t gridCols, uint32_t gridRows, const avifImage * const * cellImages, uint32_t addImageFlags) |
| { |
| if ((gridCols == 0) || (gridCols > 256) || (gridRows == 0) || (gridRows > 256)) { |
| return AVIF_RESULT_INVALID_IMAGE_GRID; |
| } |
| return avifEncoderAddImageInternal(encoder, gridCols, gridRows, cellImages, 1, addImageFlags | AVIF_ADD_IMAGE_FLAG_SINGLE); // only single image grids are supported |
| } |
| |
| static size_t avifEncoderFindExistingChunk(avifRWStream * s, size_t mdatStartOffset, const uint8_t * data, size_t size) |
| { |
| const size_t mdatCurrentOffset = avifRWStreamOffset(s); |
| const size_t mdatSearchSize = mdatCurrentOffset - mdatStartOffset; |
| if (mdatSearchSize < size) { |
| return 0; |
| } |
| const size_t mdatEndSearchOffset = mdatCurrentOffset - size; |
| for (size_t searchOffset = mdatStartOffset; searchOffset <= mdatEndSearchOffset; ++searchOffset) { |
| if (!memcmp(data, &s->raw->data[searchOffset], size)) { |
| return searchOffset; |
| } |
| } |
| return 0; |
| } |
| |
| avifResult avifEncoderFinish(avifEncoder * encoder, avifRWData * output) |
| { |
| if (encoder->data->items.count == 0) { |
| return AVIF_RESULT_NO_CONTENT; |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Finish up AV1 encoding |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (item->codec) { |
| if (!item->codec->encodeFinish(item->codec, item->encodeOutput)) { |
| return item->alpha ? AVIF_RESULT_ENCODE_ALPHA_FAILED : AVIF_RESULT_ENCODE_COLOR_FAILED; |
| } |
| |
| if (item->encodeOutput->samples.count != encoder->data->frames.count) { |
| return item->alpha ? AVIF_RESULT_ENCODE_ALPHA_FAILED : AVIF_RESULT_ENCODE_COLOR_FAILED; |
| } |
| } |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Harvest av1C properties from AV1 sequence headers |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (item->encodeOutput->samples.count > 0) { |
| const avifEncodeSample * firstSample = &item->encodeOutput->samples.sample[0]; |
| avifSequenceHeader sequenceHeader; |
| if (avifSequenceHeaderParse(&sequenceHeader, (const avifROData *)&firstSample->data)) { |
| memcpy(&item->av1C, &sequenceHeader.av1C, sizeof(avifCodecConfigurationBox)); |
| } else { |
| // This must be an invalid AV1 payload |
| return item->alpha ? AVIF_RESULT_ENCODE_ALPHA_FAILED : AVIF_RESULT_ENCODE_COLOR_FAILED; |
| } |
| } |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Begin write stream |
| |
| const avifImage * imageMetadata = encoder->data->imageMetadata; |
| // The epoch for creation_time and modification_time is midnight, Jan. 1, |
| // 1904, in UTC time. Add the number of seconds between that epoch and the |
| // Unix epoch. |
| uint64_t now = (uint64_t)time(NULL) + 2082844800; |
| |
| avifRWStream s; |
| avifRWStreamStart(&s, output); |
| |
| // ----------------------------------------------------------------------- |
| // Write ftyp |
| |
| const char * majorBrand = "avif"; |
| if (encoder->data->frames.count > 1) { |
| majorBrand = "avis"; |
| } |
| |
| avifBoxMarker ftyp = avifRWStreamWriteBox(&s, "ftyp", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteChars(&s, majorBrand, 4); // unsigned int(32) major_brand; |
| avifRWStreamWriteU32(&s, 0); // unsigned int(32) minor_version; |
| avifRWStreamWriteChars(&s, "avif", 4); // unsigned int(32) compatible_brands[]; |
| if (encoder->data->frames.count > 1) { // |
| avifRWStreamWriteChars(&s, "avis", 4); // ... compatible_brands[] |
| avifRWStreamWriteChars(&s, "msf1", 4); // ... compatible_brands[] |
| } // |
| avifRWStreamWriteChars(&s, "mif1", 4); // ... compatible_brands[] |
| avifRWStreamWriteChars(&s, "miaf", 4); // ... compatible_brands[] |
| if ((imageMetadata->depth == 8) || (imageMetadata->depth == 10)) { // |
| if (imageMetadata->yuvFormat == AVIF_PIXEL_FORMAT_YUV420) { // |
| avifRWStreamWriteChars(&s, "MA1B", 4); // ... compatible_brands[] |
| } else if (imageMetadata->yuvFormat == AVIF_PIXEL_FORMAT_YUV444) { // |
| avifRWStreamWriteChars(&s, "MA1A", 4); // ... compatible_brands[] |
| } |
| } |
| avifRWStreamFinishBox(&s, ftyp); |
| |
| // ----------------------------------------------------------------------- |
| // Start meta |
| |
| avifBoxMarker meta = avifRWStreamWriteFullBox(&s, "meta", AVIF_BOX_SIZE_TBD, 0, 0); |
| |
| // ----------------------------------------------------------------------- |
| // Write hdlr |
| |
| avifBoxMarker hdlr = avifRWStreamWriteFullBox(&s, "hdlr", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 0); // unsigned int(32) pre_defined = 0; |
| avifRWStreamWriteChars(&s, "pict", 4); // unsigned int(32) handler_type; |
| avifRWStreamWriteZeros(&s, 12); // const unsigned int(32)[3] reserved = 0; |
| avifRWStreamWriteChars(&s, "libavif", 8); // string name; (writing null terminator) |
| avifRWStreamFinishBox(&s, hdlr); |
| |
| // ----------------------------------------------------------------------- |
| // Write pitm |
| |
| if (encoder->data->primaryItemID != 0) { |
| avifRWStreamWriteFullBox(&s, "pitm", sizeof(uint16_t), 0, 0); |
| avifRWStreamWriteU16(&s, encoder->data->primaryItemID); // unsigned int(16) item_ID; |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Write iloc |
| |
| avifBoxMarker iloc = avifRWStreamWriteFullBox(&s, "iloc", AVIF_BOX_SIZE_TBD, 0, 0); |
| |
| uint8_t offsetSizeAndLengthSize = (4 << 4) + (4 << 0); // unsigned int(4) offset_size; |
| // unsigned int(4) length_size; |
| avifRWStreamWrite(&s, &offsetSizeAndLengthSize, 1); // |
| avifRWStreamWriteZeros(&s, 1); // unsigned int(4) base_offset_size; |
| // unsigned int(4) reserved; |
| avifRWStreamWriteU16(&s, (uint16_t)encoder->data->items.count); // unsigned int(16) item_count; |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| |
| uint32_t contentSize = (uint32_t)item->metadataPayload.size; |
| if (item->encodeOutput->samples.count > 0) { |
| // This is choosing sample 0's size as there are two cases here: |
| // * This is a single image, in which case this is correct |
| // * This is an image sequence, but this file should still be a valid single-image avif, |
| // so there must still be a primary item pointing at a sync sample. Since the first |
| // frame of the image sequence is guaranteed to be a sync sample, it is chosen here. |
| // |
| // TODO: Offer the ability for a user to specify which frame in the sequence should |
| // become the primary item's image, and force that frame to be a keyframe. |
| contentSize = (uint32_t)item->encodeOutput->samples.sample[0].data.size; |
| } |
| |
| avifRWStreamWriteU16(&s, item->id); // unsigned int(16) item_ID; |
| avifRWStreamWriteU16(&s, 0); // unsigned int(16) data_reference_index; |
| avifRWStreamWriteU16(&s, 1); // unsigned int(16) extent_count; |
| avifEncoderItemAddMdatFixup(item, &s); // |
| avifRWStreamWriteU32(&s, 0 /* set later */); // unsigned int(offset_size*8) extent_offset; |
| avifRWStreamWriteU32(&s, (uint32_t)contentSize); // unsigned int(length_size*8) extent_length; |
| } |
| |
| avifRWStreamFinishBox(&s, iloc); |
| |
| // ----------------------------------------------------------------------- |
| // Write iinf |
| |
| avifBoxMarker iinf = avifRWStreamWriteFullBox(&s, "iinf", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU16(&s, (uint16_t)encoder->data->items.count); // unsigned int(16) entry_count; |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| |
| avifBoxMarker infe = avifRWStreamWriteFullBox(&s, "infe", AVIF_BOX_SIZE_TBD, 2, 0); |
| avifRWStreamWriteU16(&s, item->id); // unsigned int(16) item_ID; |
| avifRWStreamWriteU16(&s, 0); // unsigned int(16) item_protection_index; |
| avifRWStreamWrite(&s, item->type, 4); // unsigned int(32) item_type; |
| avifRWStreamWriteChars(&s, item->infeName, item->infeNameSize); // string item_name; (writing null terminator) |
| if (item->infeContentType && item->infeContentTypeSize) { // string content_type; (writing null terminator) |
| avifRWStreamWriteChars(&s, item->infeContentType, item->infeContentTypeSize); |
| } |
| avifRWStreamFinishBox(&s, infe); |
| } |
| |
| avifRWStreamFinishBox(&s, iinf); |
| |
| // ----------------------------------------------------------------------- |
| // Write iref boxes |
| |
| avifBoxMarker iref = 0; |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| |
| // Count how many other items refer to this item with dimgFromID |
| uint16_t dimgCount = 0; |
| for (uint32_t dimgIndex = 0; dimgIndex < encoder->data->items.count; ++dimgIndex) { |
| avifEncoderItem * dimgItem = &encoder->data->items.item[dimgIndex]; |
| if (dimgItem->dimgFromID == item->id) { |
| ++dimgCount; |
| } |
| } |
| |
| if (dimgCount > 0) { |
| if (!iref) { |
| iref = avifRWStreamWriteFullBox(&s, "iref", AVIF_BOX_SIZE_TBD, 0, 0); |
| } |
| avifBoxMarker refType = avifRWStreamWriteBox(&s, "dimg", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteU16(&s, item->id); // unsigned int(16) from_item_ID; |
| avifRWStreamWriteU16(&s, dimgCount); // unsigned int(16) reference_count; |
| for (uint32_t dimgIndex = 0; dimgIndex < encoder->data->items.count; ++dimgIndex) { |
| avifEncoderItem * dimgItem = &encoder->data->items.item[dimgIndex]; |
| if (dimgItem->dimgFromID == item->id) { |
| avifRWStreamWriteU16(&s, dimgItem->id); // unsigned int(16) to_item_ID; |
| } |
| } |
| avifRWStreamFinishBox(&s, refType); |
| } |
| |
| if (item->irefToID != 0) { |
| if (!iref) { |
| iref = avifRWStreamWriteFullBox(&s, "iref", AVIF_BOX_SIZE_TBD, 0, 0); |
| } |
| avifBoxMarker refType = avifRWStreamWriteBox(&s, item->irefType, AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteU16(&s, item->id); // unsigned int(16) from_item_ID; |
| avifRWStreamWriteU16(&s, 1); // unsigned int(16) reference_count; |
| avifRWStreamWriteU16(&s, item->irefToID); // unsigned int(16) to_item_ID; |
| avifRWStreamFinishBox(&s, refType); |
| } |
| } |
| if (iref) { |
| avifRWStreamFinishBox(&s, iref); |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Write iprp -> ipco/ipma |
| |
| avifBoxMarker iprp = avifRWStreamWriteBox(&s, "iprp", AVIF_BOX_SIZE_TBD); |
| |
| uint8_t itemPropertyIndex = 0; |
| avifBoxMarker ipco = avifRWStreamWriteBox(&s, "ipco", AVIF_BOX_SIZE_TBD); |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| const avifBool isGrid = (item->gridCols > 0); |
| memset(&item->ipma, 0, sizeof(item->ipma)); |
| if (!item->codec && !isGrid) { |
| // No ipma to write for this item |
| continue; |
| } |
| |
| if (item->dimgFromID) { |
| // All image cells from a grid should share the exact same properties, so see if we've |
| // already written properties out for another cell in this grid, and if so, just steal |
| // their ipma and move on. This is a sneaky way to provide iprp deduplication. |
| |
| avifBool foundPreviousCell = AVIF_FALSE; |
| for (uint32_t dedupIndex = 0; dedupIndex < itemIndex; ++dedupIndex) { |
| avifEncoderItem * dedupItem = &encoder->data->items.item[dedupIndex]; |
| if (item->dimgFromID == dedupItem->dimgFromID) { |
| // We've already written dedup's items out. Steal their ipma indices and move on! |
| memcpy(&item->ipma, &dedupItem->ipma, sizeof(struct ipmaArray)); |
| foundPreviousCell = AVIF_TRUE; |
| break; |
| } |
| } |
| if (foundPreviousCell) { |
| continue; |
| } |
| } |
| |
| uint32_t imageWidth = imageMetadata->width; |
| uint32_t imageHeight = imageMetadata->height; |
| if (isGrid) { |
| imageWidth = imageMetadata->width * item->gridCols; |
| imageHeight = imageMetadata->height * item->gridRows; |
| } |
| |
| // Properties all av01 items need |
| |
| avifBoxMarker ispe = avifRWStreamWriteFullBox(&s, "ispe", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, imageWidth); // unsigned int(32) image_width; |
| avifRWStreamWriteU32(&s, imageHeight); // unsigned int(32) image_height; |
| avifRWStreamFinishBox(&s, ispe); |
| ipmaPush(&item->ipma, ++itemPropertyIndex, AVIF_FALSE); // ipma is 1-indexed, doing this afterwards is correct |
| |
| uint8_t channelCount = (item->alpha || (imageMetadata->yuvFormat == AVIF_PIXEL_FORMAT_YUV400)) ? 1 : 3; |
| avifBoxMarker pixi = avifRWStreamWriteFullBox(&s, "pixi", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU8(&s, channelCount); // unsigned int (8) num_channels; |
| for (uint8_t chan = 0; chan < channelCount; ++chan) { |
| avifRWStreamWriteU8(&s, (uint8_t)imageMetadata->depth); // unsigned int (8) bits_per_channel; |
| } |
| avifRWStreamFinishBox(&s, pixi); |
| ipmaPush(&item->ipma, ++itemPropertyIndex, AVIF_FALSE); |
| |
| if (item->codec) { |
| writeConfigBox(&s, &item->av1C); |
| ipmaPush(&item->ipma, ++itemPropertyIndex, AVIF_TRUE); |
| } |
| |
| if (item->alpha) { |
| // Alpha specific properties |
| |
| avifBoxMarker auxC = avifRWStreamWriteFullBox(&s, "auxC", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteChars(&s, alphaURN, alphaURNSize); // string aux_type; |
| avifRWStreamFinishBox(&s, auxC); |
| ipmaPush(&item->ipma, ++itemPropertyIndex, AVIF_FALSE); |
| } else { |
| // Color specific properties |
| |
| avifEncoderWriteColorProperties(&s, imageMetadata, &item->ipma, &itemPropertyIndex); |
| } |
| } |
| avifRWStreamFinishBox(&s, ipco); |
| |
| avifBoxMarker ipma = avifRWStreamWriteFullBox(&s, "ipma", AVIF_BOX_SIZE_TBD, 0, 0); |
| { |
| int ipmaCount = 0; |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (item->ipma.count > 0) { |
| ++ipmaCount; |
| } |
| } |
| avifRWStreamWriteU32(&s, ipmaCount); // unsigned int(32) entry_count; |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (item->ipma.count == 0) { |
| continue; |
| } |
| |
| avifRWStreamWriteU16(&s, item->id); // unsigned int(16) item_ID; |
| avifRWStreamWriteU8(&s, item->ipma.count); // unsigned int(8) association_count; |
| for (int i = 0; i < item->ipma.count; ++i) { // |
| uint8_t essentialAndIndex = item->ipma.associations[i]; |
| if (item->ipma.essential[i]) { |
| essentialAndIndex |= 0x80; |
| } |
| avifRWStreamWriteU8(&s, essentialAndIndex); // bit(1) essential; unsigned int(7) property_index; |
| } |
| } |
| } |
| avifRWStreamFinishBox(&s, ipma); |
| |
| avifRWStreamFinishBox(&s, iprp); |
| |
| // ----------------------------------------------------------------------- |
| // Finish meta box |
| |
| avifRWStreamFinishBox(&s, meta); |
| |
| // ----------------------------------------------------------------------- |
| // Write tracks (if an image sequence) |
| |
| if (encoder->data->frames.count > 1) { |
| static const uint32_t unityMatrix[9] = { 0x00010000, 0, 0, 0, 0x00010000, 0, 0, 0, 0x40000000 }; |
| |
| uint64_t durationInTimescales = 0; |
| for (uint32_t frameIndex = 0; frameIndex < encoder->data->frames.count; ++frameIndex) { |
| const avifEncoderFrame * frame = &encoder->data->frames.frame[frameIndex]; |
| durationInTimescales += frame->durationInTimescales; |
| } |
| |
| // ------------------------------------------------------------------- |
| // Start moov |
| |
| avifBoxMarker moov = avifRWStreamWriteBox(&s, "moov", AVIF_BOX_SIZE_TBD); |
| |
| avifBoxMarker mvhd = avifRWStreamWriteFullBox(&s, "mvhd", AVIF_BOX_SIZE_TBD, 1, 0); |
| avifRWStreamWriteU64(&s, now); // unsigned int(64) creation_time; |
| avifRWStreamWriteU64(&s, now); // unsigned int(64) modification_time; |
| avifRWStreamWriteU32(&s, (uint32_t)encoder->timescale); // unsigned int(32) timescale; |
| avifRWStreamWriteU64(&s, durationInTimescales); // unsigned int(64) duration; |
| avifRWStreamWriteU32(&s, 0x00010000); // template int(32) rate = 0x00010000; // typically 1.0 |
| avifRWStreamWriteU16(&s, 0x0100); // template int(16) volume = 0x0100; // typically, full volume |
| avifRWStreamWriteU16(&s, 0); // const bit(16) reserved = 0; |
| avifRWStreamWriteZeros(&s, 8); // const unsigned int(32)[2] reserved = 0; |
| avifRWStreamWrite(&s, unityMatrix, sizeof(unityMatrix)); |
| avifRWStreamWriteZeros(&s, 24); // bit(32)[6] pre_defined = 0; |
| avifRWStreamWriteU32(&s, encoder->data->items.count); // unsigned int(32) next_track_ID; |
| avifRWStreamFinishBox(&s, mvhd); |
| |
| // ------------------------------------------------------------------- |
| // Write tracks |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if (item->encodeOutput->samples.count == 0) { |
| continue; |
| } |
| |
| uint32_t syncSamplesCount = 0; |
| for (uint32_t sampleIndex = 0; sampleIndex < item->encodeOutput->samples.count; ++sampleIndex) { |
| avifEncodeSample * sample = &item->encodeOutput->samples.sample[sampleIndex]; |
| if (sample->sync) { |
| ++syncSamplesCount; |
| } |
| } |
| |
| avifBoxMarker trak = avifRWStreamWriteBox(&s, "trak", AVIF_BOX_SIZE_TBD); |
| |
| avifBoxMarker tkhd = avifRWStreamWriteFullBox(&s, "tkhd", AVIF_BOX_SIZE_TBD, 1, 1); |
| avifRWStreamWriteU64(&s, now); // unsigned int(64) creation_time; |
| avifRWStreamWriteU64(&s, now); // unsigned int(64) modification_time; |
| avifRWStreamWriteU32(&s, itemIndex + 1); // unsigned int(32) track_ID; |
| avifRWStreamWriteU32(&s, 0); // const unsigned int(32) reserved = 0; |
| avifRWStreamWriteU64(&s, durationInTimescales); // unsigned int(64) duration; |
| avifRWStreamWriteZeros(&s, sizeof(uint32_t) * 2); // const unsigned int(32)[2] reserved = 0; |
| avifRWStreamWriteU16(&s, 0); // template int(16) layer = 0; |
| avifRWStreamWriteU16(&s, 0); // template int(16) alternate_group = 0; |
| avifRWStreamWriteU16(&s, 0); // template int(16) volume = {if track_is_audio 0x0100 else 0}; |
| avifRWStreamWriteU16(&s, 0); // const unsigned int(16) reserved = 0; |
| avifRWStreamWrite(&s, unityMatrix, sizeof(unityMatrix)); // template int(32)[9] matrix= // { 0x00010000,0,0,0,0x00010000,0,0,0,0x40000000 }; |
| avifRWStreamWriteU32(&s, imageMetadata->width << 16); // unsigned int(32) width; |
| avifRWStreamWriteU32(&s, imageMetadata->height << 16); // unsigned int(32) height; |
| avifRWStreamFinishBox(&s, tkhd); |
| |
| if (item->irefToID != 0) { |
| avifBoxMarker tref = avifRWStreamWriteBox(&s, "tref", AVIF_BOX_SIZE_TBD); |
| avifBoxMarker refType = avifRWStreamWriteBox(&s, item->irefType, AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteU32(&s, (uint32_t)item->irefToID); |
| avifRWStreamFinishBox(&s, refType); |
| avifRWStreamFinishBox(&s, tref); |
| } |
| |
| if (!item->alpha) { |
| avifEncoderWriteTrackMetaBox(encoder, &s); |
| } |
| |
| avifBoxMarker mdia = avifRWStreamWriteBox(&s, "mdia", AVIF_BOX_SIZE_TBD); |
| |
| avifBoxMarker mdhd = avifRWStreamWriteFullBox(&s, "mdhd", AVIF_BOX_SIZE_TBD, 1, 0); |
| avifRWStreamWriteU64(&s, now); // unsigned int(64) creation_time; |
| avifRWStreamWriteU64(&s, now); // unsigned int(64) modification_time; |
| avifRWStreamWriteU32(&s, (uint32_t)encoder->timescale); // unsigned int(32) timescale; |
| avifRWStreamWriteU64(&s, durationInTimescales); // unsigned int(64) duration; |
| avifRWStreamWriteU16(&s, 21956); // bit(1) pad = 0; unsigned int(5)[3] language; ("und") |
| avifRWStreamWriteU16(&s, 0); // unsigned int(16) pre_defined = 0; |
| avifRWStreamFinishBox(&s, mdhd); |
| |
| avifBoxMarker hdlrTrak = avifRWStreamWriteFullBox(&s, "hdlr", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 0); // unsigned int(32) pre_defined = 0; |
| avifRWStreamWriteChars(&s, "pict", 4); // unsigned int(32) handler_type; |
| avifRWStreamWriteZeros(&s, 12); // const unsigned int(32)[3] reserved = 0; |
| avifRWStreamWriteChars(&s, "libavif", 8); // string name; (writing null terminator) |
| avifRWStreamFinishBox(&s, hdlrTrak); |
| |
| avifBoxMarker minf = avifRWStreamWriteBox(&s, "minf", AVIF_BOX_SIZE_TBD); |
| |
| avifBoxMarker vmhd = avifRWStreamWriteFullBox(&s, "vmhd", AVIF_BOX_SIZE_TBD, 0, 1); |
| avifRWStreamWriteU16(&s, 0); // template unsigned int(16) graphicsmode = 0; (copy over the existing image) |
| avifRWStreamWriteZeros(&s, 6); // template unsigned int(16)[3] opcolor = {0, 0, 0}; |
| avifRWStreamFinishBox(&s, vmhd); |
| |
| avifBoxMarker dinf = avifRWStreamWriteBox(&s, "dinf", AVIF_BOX_SIZE_TBD); |
| avifBoxMarker dref = avifRWStreamWriteFullBox(&s, "dref", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) entry_count; |
| avifRWStreamWriteFullBox(&s, "url ", 0, 0, 1); // flags:1 means data is in this file |
| avifRWStreamFinishBox(&s, dref); |
| avifRWStreamFinishBox(&s, dinf); |
| |
| avifBoxMarker stbl = avifRWStreamWriteBox(&s, "stbl", AVIF_BOX_SIZE_TBD); |
| |
| avifBoxMarker stco = avifRWStreamWriteFullBox(&s, "stco", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) entry_count; |
| avifEncoderItemAddMdatFixup(item, &s); // |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) chunk_offset; (set later) |
| avifRWStreamFinishBox(&s, stco); |
| |
| avifBoxMarker stsc = avifRWStreamWriteFullBox(&s, "stsc", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) entry_count; |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) first_chunk; |
| avifRWStreamWriteU32(&s, item->encodeOutput->samples.count); // unsigned int(32) samples_per_chunk; |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) sample_description_index; |
| avifRWStreamFinishBox(&s, stsc); |
| |
| avifBoxMarker stsz = avifRWStreamWriteFullBox(&s, "stsz", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 0); // unsigned int(32) sample_size; |
| avifRWStreamWriteU32(&s, item->encodeOutput->samples.count); // unsigned int(32) sample_count; |
| for (uint32_t sampleIndex = 0; sampleIndex < item->encodeOutput->samples.count; ++sampleIndex) { |
| avifEncodeSample * sample = &item->encodeOutput->samples.sample[sampleIndex]; |
| avifRWStreamWriteU32(&s, (uint32_t)sample->data.size); // unsigned int(32) entry_size; |
| } |
| avifRWStreamFinishBox(&s, stsz); |
| |
| avifBoxMarker stss = avifRWStreamWriteFullBox(&s, "stss", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, syncSamplesCount); // unsigned int(32) entry_count; |
| for (uint32_t sampleIndex = 0; sampleIndex < item->encodeOutput->samples.count; ++sampleIndex) { |
| avifEncodeSample * sample = &item->encodeOutput->samples.sample[sampleIndex]; |
| if (sample->sync) { |
| avifRWStreamWriteU32(&s, sampleIndex + 1); // unsigned int(32) sample_number; |
| } |
| } |
| avifRWStreamFinishBox(&s, stss); |
| |
| avifBoxMarker stts = avifRWStreamWriteFullBox(&s, "stts", AVIF_BOX_SIZE_TBD, 0, 0); |
| size_t sttsEntryCountOffset = avifRWStreamOffset(&s); |
| uint32_t sttsEntryCount = 0; |
| avifRWStreamWriteU32(&s, 0); // unsigned int(32) entry_count; |
| for (uint32_t sampleCount = 0, frameIndex = 0; frameIndex < encoder->data->frames.count; ++frameIndex) { |
| avifEncoderFrame * frame = &encoder->data->frames.frame[frameIndex]; |
| ++sampleCount; |
| if (frameIndex < (encoder->data->frames.count - 1)) { |
| avifEncoderFrame * nextFrame = &encoder->data->frames.frame[frameIndex + 1]; |
| if (frame->durationInTimescales == nextFrame->durationInTimescales) { |
| continue; |
| } |
| } |
| avifRWStreamWriteU32(&s, sampleCount); // unsigned int(32) sample_count; |
| avifRWStreamWriteU32(&s, (uint32_t)frame->durationInTimescales); // unsigned int(32) sample_delta; |
| sampleCount = 0; |
| ++sttsEntryCount; |
| } |
| size_t prevOffset = avifRWStreamOffset(&s); |
| avifRWStreamSetOffset(&s, sttsEntryCountOffset); |
| avifRWStreamWriteU32(&s, sttsEntryCount); |
| avifRWStreamSetOffset(&s, prevOffset); |
| avifRWStreamFinishBox(&s, stts); |
| |
| avifBoxMarker stsd = avifRWStreamWriteFullBox(&s, "stsd", AVIF_BOX_SIZE_TBD, 0, 0); |
| avifRWStreamWriteU32(&s, 1); // unsigned int(32) entry_count; |
| avifBoxMarker av01 = avifRWStreamWriteBox(&s, "av01", AVIF_BOX_SIZE_TBD); |
| avifRWStreamWriteZeros(&s, 6); // const unsigned int(8)[6] reserved = 0; |
| avifRWStreamWriteU16(&s, 1); // unsigned int(16) data_reference_index; |
| avifRWStreamWriteU16(&s, 0); // unsigned int(16) pre_defined = 0; |
| avifRWStreamWriteU16(&s, 0); // const unsigned int(16) reserved = 0; |
| avifRWStreamWriteZeros(&s, sizeof(uint32_t) * 3); // unsigned int(32)[3] pre_defined = 0; |
| avifRWStreamWriteU16(&s, (uint16_t)imageMetadata->width); // unsigned int(16) width; |
| avifRWStreamWriteU16(&s, (uint16_t)imageMetadata->height); // unsigned int(16) height; |
| avifRWStreamWriteU32(&s, 0x00480000); // template unsigned int(32) horizresolution |
| avifRWStreamWriteU32(&s, 0x00480000); // template unsigned int(32) vertresolution |
| avifRWStreamWriteU32(&s, 0); // const unsigned int(32) reserved = 0; |
| avifRWStreamWriteU16(&s, 1); // template unsigned int(16) frame_count = 1; |
| avifRWStreamWriteChars(&s, "\012AOM Coding", 11); // string[32] compressorname; |
| avifRWStreamWriteZeros(&s, 32 - 11); // |
| avifRWStreamWriteU16(&s, 0x0018); // template unsigned int(16) depth = 0x0018; |
| avifRWStreamWriteU16(&s, (uint16_t)0xffff); // int(16) pre_defined = -1; |
| writeConfigBox(&s, &item->av1C); |
| if (!item->alpha) { |
| avifEncoderWriteColorProperties(&s, imageMetadata, NULL, NULL); |
| } |
| avifRWStreamFinishBox(&s, av01); |
| avifRWStreamFinishBox(&s, stsd); |
| |
| avifRWStreamFinishBox(&s, stbl); |
| |
| avifRWStreamFinishBox(&s, minf); |
| avifRWStreamFinishBox(&s, mdia); |
| avifRWStreamFinishBox(&s, trak); |
| } |
| |
| // ------------------------------------------------------------------- |
| // Finish moov box |
| |
| avifRWStreamFinishBox(&s, moov); |
| } |
| |
| // ----------------------------------------------------------------------- |
| // Write mdat |
| |
| encoder->ioStats.colorOBUSize = 0; |
| encoder->ioStats.alphaOBUSize = 0; |
| |
| avifBoxMarker mdat = avifRWStreamWriteBox(&s, "mdat", AVIF_BOX_SIZE_TBD); |
| const size_t mdatStartOffset = avifRWStreamOffset(&s); |
| for (uint32_t itemPasses = 0; itemPasses < 3; ++itemPasses) { |
| // Use multiple passes to pack in the following order: |
| // * Pass 0: metadata (Exif/XMP) |
| // * Pass 1: alpha (AV1) |
| // * Pass 2: all other item data (AV1 color) |
| // |
| // See here for the discussion on alpha coming before color: |
| // https://github.com/AOMediaCodec/libavif/issues/287 |
| // |
| // Exif and XMP are packed first as they're required to be fully available |
| // by avifDecoderParse() before it returns AVIF_RESULT_OK, unless ignoreXMP |
| // and ignoreExif are enabled. |
| // |
| const avifBool metadataPass = (itemPasses == 0); |
| const avifBool alphaPass = (itemPasses == 1); |
| |
| for (uint32_t itemIndex = 0; itemIndex < encoder->data->items.count; ++itemIndex) { |
| avifEncoderItem * item = &encoder->data->items.item[itemIndex]; |
| if ((item->metadataPayload.size == 0) && (item->encodeOutput->samples.count == 0)) { |
| // this item has nothing for the mdat box |
| continue; |
| } |
| if (metadataPass != (item->metadataPayload.size > 0)) { |
| // only process metadata payloads when metadataPass is true |
| continue; |
| } |
| if (alphaPass != item->alpha) { |
| // only process alpha payloads when alphaPass is true |
| continue; |
| } |
| |
| size_t chunkOffset = 0; |
| |
| // Deduplication - See if an identical chunk to this has already been written |
| if (item->encodeOutput->samples.count > 0) { |
| avifEncodeSample * sample = &item->encodeOutput->samples.sample[0]; |
| chunkOffset = avifEncoderFindExistingChunk(&s, mdatStartOffset, sample->data.data, sample->data.size); |
| } else { |
| chunkOffset = avifEncoderFindExistingChunk(&s, mdatStartOffset, item->metadataPayload.data, item->metadataPayload.size); |
| } |
| |
| if (!chunkOffset) { |
| // We've never seen this chunk before; write it out |
| chunkOffset = avifRWStreamOffset(&s); |
| if (item->encodeOutput->samples.count > 0) { |
| for (uint32_t sampleIndex = 0; sampleIndex < item->encodeOutput->samples.count; ++sampleIndex) { |
| avifEncodeSample * sample = &item->encodeOutput->samples.sample[sampleIndex]; |
| avifRWStreamWrite(&s, sample->data.data, sample->data.size); |
| |
| if (item->alpha) { |
| encoder->ioStats.alphaOBUSize += sample->data.size; |
| } else { |
| encoder->ioStats.colorOBUSize += sample->data.size; |
| } |
| } |
| } else { |
| avifRWStreamWrite(&s, item->metadataPayload.data, item->metadataPayload.size); |
| } |
| } |
| |
| for (uint32_t fixupIndex = 0; fixupIndex < item->mdatFixups.count; ++fixupIndex) { |
| avifOffsetFixup * fixup = &item->mdatFixups.fixup[fixupIndex]; |
| size_t prevOffset = avifRWStreamOffset(&s); |
| avifRWStreamSetOffset(&s, fixup->offset); |
| avifRWStreamWriteU32(&s, (uint32_t)chunkOffset); |
| avifRWStreamSetOffset(&s, prevOffset); |
| } |
| } |
| } |
| avifRWStreamFinishBox(&s, mdat); |
| |
| // ----------------------------------------------------------------------- |
| // Finish up stream |
| |
| avifRWStreamFinishWrite(&s); |
| |
| return AVIF_RESULT_OK; |
| } |
| |
| avifResult avifEncoderWrite(avifEncoder * encoder, const avifImage * image, avifRWData * output) |
| { |
| avifResult addImageResult = avifEncoderAddImage(encoder, image, 1, AVIF_ADD_IMAGE_FLAG_SINGLE); |
| if (addImageResult != AVIF_RESULT_OK) { |
| return addImageResult; |
| } |
| return avifEncoderFinish(encoder, output); |
| } |
| |
| static avifBool avifImageIsOpaque(const avifImage * image) |
| { |
| if (!image->alphaPlane) { |
| return AVIF_TRUE; |
| } |
| |
| int maxChannel = (1 << image->depth) - 1; |
| if (avifImageUsesU16(image)) { |
| for (uint32_t j = 0; j < image->height; ++j) { |
| for (uint32_t i = 0; i < image->width; ++i) { |
| uint16_t * p = (uint16_t *)&image->alphaPlane[(i * 2) + (j * image->alphaRowBytes)]; |
| if (*p != maxChannel) { |
| return AVIF_FALSE; |
| } |
| } |
| } |
| } else { |
| for (uint32_t j = 0; j < image->height; ++j) { |
| for (uint32_t i = 0; i < image->width; ++i) { |
| if (image->alphaPlane[i + (j * image->alphaRowBytes)] != maxChannel) { |
| return AVIF_FALSE; |
| } |
| } |
| } |
| } |
| return AVIF_TRUE; |
| } |
| |
| static void writeConfigBox(avifRWStream * s, avifCodecConfigurationBox * cfg) |
| { |
| avifBoxMarker av1C = avifRWStreamWriteBox(s, "av1C", AVIF_BOX_SIZE_TBD); |
| |
| // unsigned int (1) marker = 1; |
| // unsigned int (7) version = 1; |
| avifRWStreamWriteU8(s, 0x80 | 0x1); |
| |
| // unsigned int (3) seq_profile; |
| // unsigned int (5) seq_level_idx_0; |
| avifRWStreamWriteU8(s, (uint8_t)((cfg->seqProfile & 0x7) << 5) | (uint8_t)(cfg->seqLevelIdx0 & 0x1f)); |
| |
| uint8_t bits = 0; |
| bits |= (cfg->seqTier0 & 0x1) << 7; // unsigned int (1) seq_tier_0; |
| bits |= (cfg->highBitdepth & 0x1) << 6; // unsigned int (1) high_bitdepth; |
| bits |= (cfg->twelveBit & 0x1) << 5; // unsigned int (1) twelve_bit; |
| bits |= (cfg->monochrome & 0x1) << 4; // unsigned int (1) monochrome; |
| bits |= (cfg->chromaSubsamplingX & 0x1) << 3; // unsigned int (1) chroma_subsampling_x; |
| bits |= (cfg->chromaSubsamplingY & 0x1) << 2; // unsigned int (1) chroma_subsampling_y; |
| bits |= (cfg->chromaSamplePosition & 0x3); // unsigned int (2) chroma_sample_position; |
| avifRWStreamWriteU8(s, bits); |
| |
| // unsigned int (3) reserved = 0; |
| // unsigned int (1) initial_presentation_delay_present; |
| // if (initial_presentation_delay_present) { |
| // unsigned int (4) initial_presentation_delay_minus_one; |
| // } else { |
| // unsigned int (4) reserved = 0; |
| // } |
| avifRWStreamWriteU8(s, 0); |
| |
| avifRWStreamFinishBox(s, av1C); |
| } |
