#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
+#include "jlossy.h" /* Private declarations for lossy codec */
/* Forward declarations */
LOCAL(void) transencode_master_selection
JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
+LOCAL(void) transencode_codec
+ JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
LOCAL(void) transencode_coef_controller
JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
transencode_master_selection (j_compress_ptr cinfo,
jvirt_barray_ptr * coef_arrays)
{
+ cinfo->data_unit = DCTSIZE;
/* Although we don't actually use input_components for transcoding,
* jcmaster.c's initial_setup will complain if input_components is 0.
*/
/* Initialize master control (includes parameter checking/processing) */
jinit_c_master_control(cinfo, TRUE /* transcode only */);
- /* Entropy encoding: either Huffman or arithmetic coding. */
- if (cinfo->arith_code) {
- ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
- } else {
- if (cinfo->progressive_mode) {
-#ifdef C_PROGRESSIVE_SUPPORTED
- jinit_phuff_encoder(cinfo);
-#else
- ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
- } else
- jinit_huff_encoder(cinfo);
- }
-
- /* We need a special coefficient buffer controller. */
- transencode_coef_controller(cinfo, coef_arrays);
+ /* We need a special compression codec. */
+ transencode_codec(cinfo, coef_arrays);
jinit_marker_writer(cinfo);
/* Private buffer controller object */
typedef struct {
- struct jpeg_c_coef_controller pub; /* public fields */
-
JDIMENSION iMCU_row_num; /* iMCU row # within image */
JDIMENSION mcu_ctr; /* counts MCUs processed in current row */
int MCU_vert_offset; /* counts MCU rows within iMCU row */
jvirt_barray_ptr * whole_image;
/* Workspace for constructing dummy blocks at right/bottom edges. */
- JBLOCKROW dummy_buffer[C_MAX_BLOCKS_IN_MCU];
-} my_coef_controller;
+ JBLOCKROW dummy_buffer[C_MAX_DATA_UNITS_IN_MCU];
+} c_coef_controller;
-typedef my_coef_controller * my_coef_ptr;
+typedef c_coef_controller * c_coef_ptr;
LOCAL(void)
start_iMCU_row (j_compress_ptr cinfo)
/* Reset within-iMCU-row counters for a new row */
{
- my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+ j_lossy_c_ptr lossyc = (j_lossy_c_ptr) cinfo->codec;
+ c_coef_ptr coef = (c_coef_ptr) lossyc->coef_private;
/* In an interleaved scan, an MCU row is the same as an iMCU row.
* In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
METHODDEF(void)
start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
{
- my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+ j_lossy_c_ptr lossyc = (j_lossy_c_ptr) cinfo->codec;
+ c_coef_ptr coef = (c_coef_ptr) lossyc->coef_private;
if (pass_mode != JBUF_CRANK_DEST)
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
METHODDEF(boolean)
compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
{
- my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+ j_lossy_c_ptr lossyc = (j_lossy_c_ptr) cinfo->codec;
+ c_coef_ptr coef = (c_coef_ptr) lossyc->coef_private;
JDIMENSION MCU_col_num; /* index of current MCU within row */
JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
int blkn, ci, xindex, yindex, yoffset, blockcnt;
JDIMENSION start_col;
JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
- JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU];
+ JBLOCKROW MCU_buffer[C_MAX_DATA_UNITS_IN_MCU];
JBLOCKROW buffer_ptr;
jpeg_component_info *compptr;
-
- input_buf = 0;
+ (void)input_buf;
/* Align the virtual buffers for the components used in this scan. */
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
}
}
/* Try to write the MCU. */
- if (! (*cinfo->entropy->encode_mcu) (cinfo, MCU_buffer)) {
+ if (! (*lossyc->entropy_encode_mcu) (cinfo, MCU_buffer)) {
/* Suspension forced; update state counters and exit */
coef->MCU_vert_offset = yoffset;
coef->mcu_ctr = MCU_col_num;
* Initialize coefficient buffer controller.
*
* Each passed coefficient array must be the right size for that
- * coefficient: width_in_blocks wide and height_in_blocks high,
+ * coefficient: width_in_data_units wide and height_in_data_units high,
* with unitheight at least v_samp_factor.
*/
transencode_coef_controller (j_compress_ptr cinfo,
jvirt_barray_ptr * coef_arrays)
{
- my_coef_ptr coef;
+ j_lossy_c_ptr lossyc = (j_lossy_c_ptr) cinfo->codec;
+ c_coef_ptr coef;
JBLOCKROW buffer;
int i;
- coef = (my_coef_ptr)
+ coef = (c_coef_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(my_coef_controller));
- cinfo->coef = (struct jpeg_c_coef_controller *) coef;
- coef->pub.start_pass = start_pass_coef;
- coef->pub.compress_data = compress_output;
+ SIZEOF(c_coef_controller));
+ lossyc->coef_private = (struct jpeg_c_coef_controller *) coef;
/* Save pointer to virtual arrays */
coef->whole_image = coef_arrays;
/* Allocate and pre-zero space for dummy DCT blocks. */
buffer = (JBLOCKROW)
(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
- jzero_far((void FAR *) buffer, C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
- for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) {
+ C_MAX_DATA_UNITS_IN_MCU * SIZEOF(JBLOCK));
+ jzero_far((void FAR *) buffer, C_MAX_DATA_UNITS_IN_MCU * SIZEOF(JBLOCK));
+ for (i = 0; i < C_MAX_DATA_UNITS_IN_MCU; i++) {
coef->dummy_buffer[i] = buffer + i;
}
}
+
+
+/*
+ * Initialize the transencoer codec.
+ * This is called only once, during master selection.
+ */
+
+LOCAL(void)
+transencode_codec (j_compress_ptr cinfo,
+ jvirt_barray_ptr * coef_arrays)
+{
+ j_lossy_c_ptr lossyc;
+
+ /* Create subobject in permanent pool */
+ lossyc = (j_lossy_c_ptr)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+ SIZEOF(jpeg_lossy_c_codec));
+ cinfo->codec = (struct jpeg_c_codec *) lossyc;
+
+ /* Initialize sub-modules */
+
+ /* Entropy encoding: either Huffman or arithmetic coding. */
+ if (cinfo->arith_code) {
+ jinit_arith_encoder(cinfo);
+ } else {
+ if (cinfo->process == JPROC_PROGRESSIVE) {
+#ifdef C_PROGRESSIVE_SUPPORTED
+ jinit_phuff_encoder(cinfo);
+#else
+ ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+ } else
+ jinit_shuff_encoder(cinfo);
+ }
+
+ /* We need a special coefficient buffer controller. */
+ transencode_coef_controller(cinfo, coef_arrays);
+
+ /* Initialize method pointers */
+ lossyc->pub.start_pass = start_pass_coef;
+ lossyc->pub.compress_data = compress_output;
+}
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff