36#include <libopenraw/debug.h>
38#include "bitmapdata.hpp"
39#include "io/stream.hpp"
40#include "io/streamclone.hpp"
42#include "jfifcontainer.hpp"
43#include "ifdfilecontainer.hpp"
54void j_init_source(::j_decompress_ptr cinfo);
55::boolean j_fill_input_buffer(::j_decompress_ptr cinfo);
56void j_skip_input_data(::j_decompress_ptr cinfo,
58void j_term_source(::j_decompress_ptr cinfo);
59void j_error_exit(::j_common_ptr cinfo);
68 struct jpeg_source_mgr pub;
74JfifContainer::JfifContainer(
const IO::Stream::Ptr &_file, off_t _offset)
79 setEndian(ENDIAN_BIG);
84 m_cinfo.err = jpeg_std_error(&m_jerr);
85 m_jerr.error_exit = &j_error_exit;
86 jpeg_create_decompress(&m_cinfo);
91 (*m_cinfo.mem->alloc_small)((j_common_ptr)&m_cinfo,
94 m_cinfo.src = (jpeg_source_mgr*)src;
95 src->
pub.init_source = j_init_source;
96 src->
pub.fill_input_buffer = j_fill_input_buffer;
97 src->
pub.skip_input_data = j_skip_input_data;
98 src->
pub.resync_to_restart = jpeg_resync_to_restart;
99 src->
pub.term_source = j_term_source;
101 src->
pub.bytes_in_buffer = 0;
102 src->
pub.next_input_byte =
nullptr;
103 src->buf = (JOCTET*)(*m_cinfo.mem->alloc_small)
104 ((j_common_ptr)&m_cinfo,
106 BUF_SIZE *
sizeof(JOCTET));
111 jpeg_destroy_decompress(&m_cinfo);
115bool JfifContainer::getDimensions(uint32_t &x, uint32_t &y)
117 if(!m_headerLoaded) {
118 if (_loadHeader() == 0) {
119 LOGDBG1(
"load header failed\n");
123 x = m_cinfo.output_width;
124 y = m_cinfo.output_height;
129bool JfifContainer::getDecompressedData(BitmapData &data)
131 if(!m_headerLoaded) {
132 if (_loadHeader() == 0) {
133 LOGDBG1(
"load header failed\n");
137 if (::setjmp(m_jpegjmp) != 0) {
140 jpeg_start_decompress(&m_cinfo);
141 int row_size = m_cinfo.output_width * m_cinfo.output_components;
143 = (
char*)data.allocData(row_size * m_cinfo.output_height);
144 char *currentPtr = dataPtr;
146 = (*m_cinfo.mem->alloc_sarray)((j_common_ptr)&m_cinfo,
147 JPOOL_IMAGE, row_size,
149 while (m_cinfo.output_scanline < m_cinfo.output_height) {
150 jpeg_read_scanlines(&m_cinfo, buffer, 1);
151 memcpy(currentPtr, buffer, row_size);
152 currentPtr += row_size;
154 data.setDimensions(m_cinfo.output_width, m_cinfo.output_height);
156 jpeg_finish_decompress(&m_cinfo);
161int JfifContainer::_loadHeader()
164 m_file->seek(0, SEEK_SET);
166 if (::setjmp(m_jpegjmp) == 0) {
167 int ret = jpeg_read_header(&m_cinfo, TRUE);
169 jpeg_calc_output_dimensions(&m_cinfo);
170 m_headerLoaded = (ret == 1);
178void j_error_exit(j_common_ptr cinfo)
180 (*cinfo->err->output_message) (cinfo);
181 JfifContainer *self = ((jpeg_src_t *)(((j_decompress_ptr)cinfo)->src))->self;
182 ::longjmp(self->jpegjmp(), 1);
185void j_init_source(j_decompress_ptr)
190boolean j_fill_input_buffer(j_decompress_ptr cinfo)
192 jpeg_src_t *src = (jpeg_src_t*)cinfo->src;
193 JfifContainer *self = src->self;
194 int n = self->file()->read(src->buf, BUF_SIZE *
sizeof(*src->buf));
196 src->pub.next_input_byte = src->buf;
197 src->pub.bytes_in_buffer = n;
200 src->pub.next_input_byte =
nullptr;
201 src->pub.bytes_in_buffer = 0;
207void j_skip_input_data(j_decompress_ptr cinfo,
210 jpeg_src_t *src = (jpeg_src_t*)cinfo->src;
212 while ((
size_t)num_bytes > src->pub.bytes_in_buffer) {
213 num_bytes -= src->pub.bytes_in_buffer;
214 j_fill_input_buffer(cinfo);
216 src->pub.next_input_byte += (size_t) num_bytes;
217 src->pub.bytes_in_buffer -= (size_t) num_bytes;
222void j_term_source(j_decompress_ptr)
231 m_file->seek(0, SEEK_SET);
241 if(memcmp(delim,
"Exif\0\0", 6) == 0) {
242 size_t exif_offset =
m_file->seek(0, SEEK_CUR);
245 std::make_shared<IO::StreamClone>(
m_file, exif_offset)), 0));
254 return m_ifd->setDirectory(0);
256 return IfdDir::Ref();
262 return m_ifd->setDirectory(idx);
264 return IfdDir::Ref();
271 return main->getExifIFD();
IfdDir::Ref getIfdDirAt(int idx)
std::unique_ptr< IfdFileContainer > & ifdContainer()
Option< uint16_t > readUInt16(const IO::Stream::Ptr &f)
CIFF is the container for CRW files. It is an attempt from Canon to make this a standard....
struct jpeg_source_mgr pub