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https://gitlab.uni-freiburg.de/opensourcevdi/spice
synced 2025-12-26 22:48:19 +00:00
dcc: Rewrite dcc_image_compress
Rules are now: Compression type: off -> uncompressed quic -> jpeg if possible else quic else off lz -> lz if possible else off glz -> glz if possible else lz else off auto_lz -> lz if possible else jpeg else quic else off auto_glz -> glz if possible else lz else jpeg else quic else off lz4 -> lz4 if possible else lz else off jpeg is used only when jpeg-wan-compression allows it Acked-by: Frediano Ziglio <fziglio@redhat.com>
This commit is contained in:
Pavel Grunt
Frediano Ziglio
parent
51bd316ce5
commit
f401eb07f9
214
server/dcc.c
214
server/dcc.c
@ -1081,124 +1081,152 @@ static int dcc_compress_image_quic(DisplayChannelClient *dcc, SpiceImage *dest,
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return TRUE;
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}
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#define MIN_SIZE_TO_COMPRESS 54
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#define MIN_DIMENSION_TO_QUIC 3
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/**
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* quic doesn't handle:
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* (1) palette
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*/
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static bool can_quic_compress(SpiceBitmap *bitmap)
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{
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return !bitmap_fmt_is_plt(bitmap->format) &&
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bitmap->x >= MIN_DIMENSION_TO_QUIC && bitmap->y >= MIN_DIMENSION_TO_QUIC;
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}
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/**
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* lz doesn't handle:
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* (1) bitmaps with strides that are larger than the width of the image in bytes
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* (2) unstable bitmaps
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*/
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static bool can_lz_compress(SpiceBitmap *bitmap)
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{
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return !bitmap_has_extra_stride(bitmap) &&
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!(bitmap->data->flags & SPICE_CHUNKS_FLAGS_UNSTABLE);
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}
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#define MIN_SIZE_TO_COMPRESS 54
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static SpiceImageCompression get_compression_for_bitmap(SpiceBitmap *bitmap,
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SpiceImageCompression preferred_compression,
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Drawable *drawable)
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{
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if (bitmap->y * bitmap->stride < MIN_SIZE_TO_COMPRESS) { // TODO: change the size cond
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return SPICE_IMAGE_COMPRESSION_OFF;
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_OFF) {
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return SPICE_IMAGE_COMPRESSION_OFF;
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_QUIC) {
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if (can_quic_compress(bitmap)) {
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return SPICE_IMAGE_COMPRESSION_QUIC;
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}
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return SPICE_IMAGE_COMPRESSION_OFF;
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_AUTO_GLZ ||
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preferred_compression == SPICE_IMAGE_COMPRESSION_AUTO_LZ) {
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if (can_quic_compress(bitmap)) {
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if (drawable == NULL ||
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drawable->copy_bitmap_graduality == BITMAP_GRADUAL_INVALID) {
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if (bitmap_fmt_has_graduality(bitmap->format) &&
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bitmap_get_graduality_level(bitmap) == BITMAP_GRADUAL_HIGH) {
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return SPICE_IMAGE_COMPRESSION_QUIC;
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}
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} else if (!can_lz_compress(bitmap) ||
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drawable->copy_bitmap_graduality == BITMAP_GRADUAL_HIGH) {
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return SPICE_IMAGE_COMPRESSION_QUIC;
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}
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_AUTO_LZ) {
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preferred_compression = SPICE_IMAGE_COMPRESSION_LZ;
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} else {
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preferred_compression = SPICE_IMAGE_COMPRESSION_GLZ;
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}
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_GLZ) {
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if (drawable == NULL || !bitmap_fmt_has_graduality(bitmap->format)) {
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preferred_compression = SPICE_IMAGE_COMPRESSION_LZ;
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}
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_LZ4) {
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if (!bitmap_fmt_is_rgb(bitmap->format)) {
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preferred_compression = SPICE_IMAGE_COMPRESSION_LZ;
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}
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}
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if (preferred_compression == SPICE_IMAGE_COMPRESSION_LZ ||
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preferred_compression == SPICE_IMAGE_COMPRESSION_LZ4 ||
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preferred_compression == SPICE_IMAGE_COMPRESSION_GLZ) {
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if (can_lz_compress(bitmap)) {
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return preferred_compression;
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}
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return SPICE_IMAGE_COMPRESSION_OFF;
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}
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return SPICE_IMAGE_COMPRESSION_INVALID;
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}
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int dcc_compress_image(DisplayChannelClient *dcc,
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SpiceImage *dest, SpiceBitmap *src, Drawable *drawable,
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int can_lossy,
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compress_send_data_t* o_comp_data)
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{
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DisplayChannel *display_channel = DCC_TO_DC(dcc);
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SpiceImageCompression image_compression = dcc->image_compression;
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int quic_compress = FALSE;
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SpiceImageCompression image_compression;
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if ((image_compression == SPICE_IMAGE_COMPRESSION_OFF) ||
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((src->y * src->stride) < MIN_SIZE_TO_COMPRESS)) { // TODO: change the size cond
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image_compression = get_compression_for_bitmap(src, dcc->image_compression, drawable);
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switch (image_compression) {
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case SPICE_IMAGE_COMPRESSION_OFF:
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return FALSE;
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} else if (image_compression == SPICE_IMAGE_COMPRESSION_QUIC) {
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if (bitmap_fmt_is_plt(src->format)) {
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return FALSE;
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} else {
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quic_compress = TRUE;
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case SPICE_IMAGE_COMPRESSION_QUIC:
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if (can_lossy && display_channel->enable_jpeg &&
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(src->format != SPICE_BITMAP_FMT_RGBA || !bitmap_has_extra_stride(src))) {
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#ifdef COMPRESS_DEBUG
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spice_info("JPEG compress");
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#endif
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return dcc_compress_image_jpeg(dcc, dest, src, o_comp_data);
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}
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} else {
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/*
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lz doesn't handle (1) bitmaps with strides that are larger than the width
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of the image in bytes (2) unstable bitmaps
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*/
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if (bitmap_has_extra_stride(src) || (src->data->flags & SPICE_CHUNKS_FLAGS_UNSTABLE)) {
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if ((image_compression == SPICE_IMAGE_COMPRESSION_LZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_GLZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_LZ4) ||
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bitmap_fmt_is_plt(src->format)) {
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return FALSE;
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} else {
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quic_compress = TRUE;
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}
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} else {
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if ((image_compression == SPICE_IMAGE_COMPRESSION_AUTO_LZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_AUTO_GLZ)) {
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if ((src->x < MIN_DIMENSION_TO_QUIC) || (src->y < MIN_DIMENSION_TO_QUIC)) {
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quic_compress = FALSE;
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} else {
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if (drawable == NULL ||
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drawable->copy_bitmap_graduality == BITMAP_GRADUAL_INVALID) {
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quic_compress = bitmap_fmt_has_graduality(src->format) &&
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bitmap_get_graduality_level(src) == BITMAP_GRADUAL_HIGH;
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} else {
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quic_compress = (drawable->copy_bitmap_graduality == BITMAP_GRADUAL_HIGH);
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}
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}
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} else {
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quic_compress = FALSE;
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}
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}
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}
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if (quic_compress) {
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#ifdef COMPRESS_DEBUG
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spice_info("QUIC compress");
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#endif
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// if bitmaps is picture-like, compress it using jpeg
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if (can_lossy && display_channel->enable_jpeg &&
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((image_compression == SPICE_IMAGE_COMPRESSION_AUTO_LZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_AUTO_GLZ))) {
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// if we use lz for alpha, the stride can't be extra
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if (src->format != SPICE_BITMAP_FMT_RGBA || !bitmap_has_extra_stride(src)) {
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return dcc_compress_image_jpeg(dcc, dest, src, o_comp_data);
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}
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}
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return dcc_compress_image_quic(dcc, dest, src, o_comp_data);
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} else {
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int glz;
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int ret;
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if ((image_compression == SPICE_IMAGE_COMPRESSION_AUTO_GLZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_GLZ)) {
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glz = drawable != NULL && bitmap_fmt_has_graduality(src->format) &&
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((src->x * src->y) < glz_enc_dictionary_get_size(dcc->glz_dict->dict));
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} else if ((image_compression == SPICE_IMAGE_COMPRESSION_AUTO_LZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_LZ) ||
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(image_compression == SPICE_IMAGE_COMPRESSION_LZ4)) {
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glz = FALSE;
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} else {
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spice_error("invalid image compression type %u", image_compression);
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return FALSE;
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}
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if (glz) {
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case SPICE_IMAGE_COMPRESSION_GLZ:
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if ((src->x * src->y) < glz_enc_dictionary_get_size(dcc->glz_dict->dict)) {
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int ret, frozen;
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/* using the global dictionary only if it is not frozen */
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pthread_rwlock_rdlock(&dcc->glz_dict->encode_lock);
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if (!dcc->glz_dict->migrate_freeze) {
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ret = dcc_compress_image_glz(dcc,
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dest, src,
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drawable, o_comp_data);
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} else {
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glz = FALSE;
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frozen = dcc->glz_dict->migrate_freeze;
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if (!frozen) {
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#ifdef COMPRESS_DEBUG
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spice_info("LZ global compress fmt=%d", src->format);
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#endif
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ret = dcc_compress_image_glz(dcc, dest, src, drawable, o_comp_data);
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}
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pthread_rwlock_unlock(&dcc->glz_dict->encode_lock);
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if (!frozen) {
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return ret;
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}
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}
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if (!glz) {
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goto lz_compress;
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#ifdef USE_LZ4
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if (image_compression == SPICE_IMAGE_COMPRESSION_LZ4 &&
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bitmap_fmt_is_rgb(src->format) &&
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red_channel_client_test_remote_cap(&dcc->common.base,
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SPICE_DISPLAY_CAP_LZ4_COMPRESSION)) {
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ret = dcc_compress_image_lz4(dcc, dest, src, o_comp_data);
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} else
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#endif
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ret = dcc_compress_image_lz(dcc, dest, src, o_comp_data);
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case SPICE_IMAGE_COMPRESSION_LZ4:
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if (red_channel_client_test_remote_cap(&dcc->common.base,
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SPICE_DISPLAY_CAP_LZ4_COMPRESSION)) {
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#ifdef COMPRESS_DEBUG
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spice_info("LZ LOCAL compress");
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spice_info("LZ4 compress");
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#endif
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}
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#ifdef COMPRESS_DEBUG
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else {
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spice_info("LZ global compress fmt=%d", src->format);
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return dcc_compress_image_lz4(dcc, dest, src, o_comp_data);
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}
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#endif
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return ret;
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lz_compress:
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case SPICE_IMAGE_COMPRESSION_LZ:
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#ifdef COMPRESS_DEBUG
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spice_info("LZ LOCAL compress");
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#endif
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return dcc_compress_image_lz(dcc, dest, src, o_comp_data);
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default:
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spice_error("invalid image compression type %u", image_compression);
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}
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return FALSE;
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}
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#define CLIENT_PALETTE_CACHE
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