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quirc/demo/mjpeg.c
Alexandre Perrin d283137a60 fix mjpeg_decode_rgb32(). 
Before this patch the `rgb` pointer was incremented by the "inner" for
loop but never reset to the start of the buffer by the "outer" while
loop.

This bug was introduced by the refactoring in
6158aeb30a.
2018-01-31 15:29:01 +01:00

284 lines
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C
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/* quirc -- QR-code recognition library
* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <jpeglib.h>
#include <assert.h>
#include "mjpeg.h"
struct huffman_table {
uint8_t bits[17];
uint8_t huffval[256];
};
static const struct huffman_table dc_lum = {
.bits = {
0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00
},
.huffval = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b
}
};
static const struct huffman_table ac_lum = {
.bits = {
0x00, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04,
0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01,
0x7d
},
.huffval = {
0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
}
};
static const struct huffman_table dc_chroma = {
.bits = {
0x00, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00
},
.huffval = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b
}
};
static const struct huffman_table ac_chroma = {
.bits = {
0x00, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03,
0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02,
0x77
},
.huffval = {
0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
0xf9, 0xfa
}
};
static void init_source(j_decompress_ptr cinfo)
{
}
static boolean fill_input_buffer(j_decompress_ptr cinfo)
{
static const uint8_t eoi_marker[] = {0xff, 0xd9};
cinfo->src->next_input_byte = eoi_marker;
cinfo->src->bytes_in_buffer = 2;
return TRUE;
}
static void skip_input_data(j_decompress_ptr cinfo, long num_bytes)
{
if (num_bytes < 0)
return;
if (num_bytes > cinfo->src->bytes_in_buffer)
num_bytes = cinfo->src->bytes_in_buffer;
cinfo->src->bytes_in_buffer -= num_bytes;
cinfo->src->next_input_byte += num_bytes;
}
static void term_source(j_decompress_ptr cinfo)
{
}
struct my_jpeg_error {
struct jpeg_error_mgr base;
jmp_buf env;
};
static void my_output_message(struct jpeg_common_struct *com)
{
struct mjpeg_decoder *mj = (struct mjpeg_decoder *)com->err;
char buf[JMSG_LENGTH_MAX];
mj->err.format_message(com, buf);
fprintf(stderr, "MJPEG error: %s\n", buf);
}
static void my_error_exit(struct jpeg_common_struct *com)
{
struct mjpeg_decoder *mj = (struct mjpeg_decoder *)com->err;
my_output_message(com);
longjmp(mj->env, 0);
}
static void setup_table(struct jpeg_decompress_struct *jpeg,
JHUFF_TBL **tbl_ptr, const struct huffman_table *tab)
{
assert (*tbl_ptr == NULL);
*tbl_ptr = jpeg_alloc_huff_table((j_common_ptr)jpeg);
memcpy((*tbl_ptr)->bits, tab->bits, 17);
memcpy((*tbl_ptr)->huffval, tab->huffval, 256);
}
void mjpeg_init(struct mjpeg_decoder *mj)
{
memset(mj, 0, sizeof(*mj));
/* Set up error management */
mj->dinfo.err = jpeg_std_error(&mj->err);
mj->err.error_exit = my_error_exit;
mj->err.output_message = my_output_message;
mj->src.init_source = init_source;
mj->src.fill_input_buffer = fill_input_buffer;
mj->src.skip_input_data = skip_input_data;
mj->src.resync_to_restart = jpeg_resync_to_restart;
mj->src.term_source = term_source;
jpeg_create_decompress(&mj->dinfo);
mj->dinfo.src = &mj->src;
mj->dinfo.err = &mj->err;
setup_table(&mj->dinfo, &mj->dinfo.dc_huff_tbl_ptrs[0], &dc_lum);
setup_table(&mj->dinfo, &mj->dinfo.ac_huff_tbl_ptrs[0], &ac_lum);
setup_table(&mj->dinfo, &mj->dinfo.dc_huff_tbl_ptrs[1], &dc_chroma);
setup_table(&mj->dinfo, &mj->dinfo.ac_huff_tbl_ptrs[1], &ac_chroma);
}
void mjpeg_free(struct mjpeg_decoder *mj)
{
jpeg_destroy_decompress(&mj->dinfo);
}
int mjpeg_decode_rgb32(struct mjpeg_decoder *mj,
const uint8_t *data, int datalen,
uint8_t *out, int pitch, int max_w, int max_h)
{
if (setjmp(mj->env))
return -1;
mj->dinfo.src->bytes_in_buffer = datalen;
mj->dinfo.src->next_input_byte = data;
jpeg_read_header(&mj->dinfo, TRUE);
mj->dinfo.output_components = 3;
mj->dinfo.out_color_space = JCS_RGB;
jpeg_start_decompress(&mj->dinfo);
if (mj->dinfo.image_height > max_h ||
mj->dinfo.image_width > max_w) {
fprintf(stderr, "MJPEG: frame too big\n");
return -1;
}
uint8_t *rgb = calloc(mj->dinfo.image_width, 3);
if (!rgb) {
fprintf(stderr, "memory allocation failed\n");
return -1;
}
while (mj->dinfo.output_scanline < mj->dinfo.image_height) {
uint8_t *scr = out + pitch * mj->dinfo.output_scanline;
uint8_t *output = rgb;
int i;
jpeg_read_scanlines(&mj->dinfo, &output, 1);
for (i = 0; i < mj->dinfo.image_width; i++) {
scr[0] = output[2];
scr[1] = output[1];
scr[2] = output[0];
scr += 4;
output += 3;
}
}
free(rgb);
jpeg_finish_decompress(&mj->dinfo);
return 0;
}
int mjpeg_decode_gray(struct mjpeg_decoder *mj,
const uint8_t *data, int datalen,
uint8_t *out, int pitch, int max_w, int max_h)
{
if (setjmp(mj->env))
return -1;
mj->dinfo.src->bytes_in_buffer = datalen;
mj->dinfo.src->next_input_byte = data;
jpeg_read_header(&mj->dinfo, TRUE);
mj->dinfo.output_components = 1;
mj->dinfo.out_color_space = JCS_GRAYSCALE;
jpeg_start_decompress(&mj->dinfo);
if (mj->dinfo.image_height > max_h ||
mj->dinfo.image_width > max_w) {
fprintf(stderr, "MJPEG: frame too big\n");
return -1;
}
while (mj->dinfo.output_scanline < mj->dinfo.image_height) {
uint8_t *scr = out + pitch * mj->dinfo.output_scanline;
jpeg_read_scanlines(&mj->dinfo, &scr, 1);
}
jpeg_finish_decompress(&mj->dinfo);
return 0;
}
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