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feat(decoder): add compressed c-array image support (#4925)

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Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>
This commit is contained in:
Neo Xu 2023-12-05 06:05:21 +08:00 committed by GitHub
parent 91020ea20e
commit 7b6f360d46
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 64 additions and 41 deletions
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105
src/libs/bin_decoder/lv_bin_decoder.c
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@ -227,10 +227,9 @@ lv_result_t lv_bin_decoder_open(lv_image_decoder_t * decoder, lv_image_decoder_d
lv_color_format_t cf = image->header.cf;
if(dsc->header.flags & LV_IMAGE_FLAGS_COMPRESSED) {
/*@todo*/
res = LV_RESULT_INVALID;
res = decode_compressed(decoder, dsc);
}
if(LV_COLOR_FORMAT_IS_INDEXED(cf)) {
else if(LV_COLOR_FORMAT_IS_INDEXED(cf)) {
/*Need decoder data to store converted image*/
decoder_data_t * decoder_data = get_decoder_data(dsc);
if(decoder_data == NULL) {
@ -665,53 +664,77 @@ static lv_result_t decode_compressed(lv_image_decoder_t * decoder, lv_image_deco
uint32_t compressed_len;
uint8_t * file_buf;
decoder_data_t * decoder_data = get_decoder_data(dsc);
lv_fs_file_t * f = decoder_data->f;
lv_result_t res;
lv_image_compressed_t * compressed = &decoder_data->compressed;
bool is_file = dsc->src_type == LV_IMAGE_SRC_FILE;
lv_memzero(compressed, sizeof(lv_image_compressed_t));
if(lv_fs_seek(f, 0, LV_FS_SEEK_END) != LV_FS_RES_OK ||
lv_fs_tell(f, &compressed_len) != LV_FS_RES_OK) {
LV_LOG_WARN("Failed to get compressed file len");
if(is_file) {
lv_fs_file_t * f = decoder_data->f;
if(lv_fs_seek(f, 0, LV_FS_SEEK_END) != LV_FS_RES_OK ||
lv_fs_tell(f, &compressed_len) != LV_FS_RES_OK) {
LV_LOG_WARN("Failed to get compressed file len");
return LV_RESULT_INVALID;
}
compressed_len -= sizeof(lv_image_header_t);
compressed_len -= 12;
/*Read compress header*/
len = 12;
res = fs_read_file_at(f, sizeof(lv_image_header_t), compressed, len, &rn);
if(res != LV_FS_RES_OK || rn != len) {
LV_LOG_WARN("Read compressed header failed: %d", res);
return LV_RESULT_INVALID;
}
if(compressed->compressed_size != compressed_len) {
LV_LOG_WARN("Compressed size mismatch: %" LV_PRIu32" != %" LV_PRIu32, compressed->compressed_size, compressed_len);
return LV_RESULT_INVALID;
}
file_buf = lv_malloc(compressed_len);
if(file_buf == NULL) {
LV_LOG_WARN("No memory for compressed file");
return LV_RESULT_INVALID;
}
/*Continue to read the compressed data following compression header*/
res = lv_fs_read(f, file_buf, compressed_len, &rn);
if(res != LV_FS_RES_OK || rn != compressed_len) {
LV_LOG_WARN("Read compressed file failed: %d", res);
lv_free(file_buf);
return LV_RESULT_INVALID;
}
/*Decompress the image*/
compressed->data = file_buf;
}
else if(dsc->src_type == LV_IMAGE_SRC_VARIABLE) {
lv_image_dsc_t * image = (lv_image_dsc_t *)dsc->src;
compressed_len = image->data_size;
/*Read compress header*/
len = 12;
compressed_len -= len;
lv_memcpy(compressed, image->data, len);
compressed->data = image->data + len;
if(compressed->compressed_size != compressed_len) {
LV_LOG_WARN("Compressed size mismatch: %" LV_PRIu32" != %" LV_PRIu32, compressed->compressed_size, compressed_len);
return LV_RESULT_INVALID;
}
}
else {
LV_LOG_WARN("Compressed image only support file or variable");
return LV_RESULT_INVALID;
}
compressed_len -= sizeof(lv_image_header_t);
compressed_len -= 12;
/*Read compress header*/
len = 12;
res = fs_read_file_at(f, sizeof(lv_image_header_t), compressed, len, &rn);
if(res != LV_FS_RES_OK || rn != len) {
LV_LOG_WARN("Read compressed header failed: %d", res);
return LV_RESULT_INVALID;
}
if(compressed->compressed_size != compressed_len) {
LV_LOG_WARN("Compressed size mismatch: %" LV_PRIu32" != %" LV_PRIu32, compressed->compressed_size, compressed_len);
return LV_RESULT_INVALID;
}
file_buf = lv_malloc(compressed_len);
if(file_buf == NULL) {
LV_LOG_WARN("No memory for compressed file");
return LV_RESULT_INVALID;
}
/*Continue to read the compressed data following compression header*/
res = lv_fs_read(f, file_buf, compressed_len, &rn);
if(res != LV_FS_RES_OK || rn != compressed_len) {
LV_LOG_WARN("Read compressed file failed: %d", res);
lv_free(file_buf);
return LV_RESULT_INVALID;
}
/*Decompress the image*/
compressed->data = file_buf;
res = decompress_image(dsc, compressed);
compressed->data = NULL; /*No need to store the data any more*/
lv_free(file_buf);
if(is_file) lv_free(file_buf);
if(res != LV_RESULT_OK) {
LV_LOG_WARN("Decompress failed");
return LV_RESULT_INVALID;