| /********************************************************************* |
| * Software License Agreement (BSD License) |
| * |
| * Copyright (C) 2014 Robert Xiao |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of the author nor other contributors may be |
| * used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| *********************************************************************/ |
| |
| /** |
| * @defgroup frame Frame processing |
| */ |
| #include "libuvc/libuvc.h" |
| #include "libuvc/libuvc_internal.h" |
| #include <jpeglib.h> |
| #include <setjmp.h> |
| |
| extern uvc_error_t uvc_ensure_frame_size(uvc_frame_t *frame, size_t need_bytes); |
| |
| struct error_mgr { |
| struct jpeg_error_mgr super; |
| jmp_buf jmp; |
| }; |
| |
| static void _error_exit(j_common_ptr dinfo) { |
| struct error_mgr *myerr = (struct error_mgr *)dinfo->err; |
| (*dinfo->err->output_message)(dinfo); |
| longjmp(myerr->jmp, 1); |
| } |
| |
| /* ISO/IEC 10918-1:1993(E) K.3.3. Default Huffman tables used by MJPEG UVC devices |
| which don't specify a Huffman table in the JPEG stream. */ |
| static const unsigned char dc_lumi_len[] = |
| {0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0}; |
| static const unsigned char dc_lumi_val[] = |
| {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}; |
| |
| static const unsigned char dc_chromi_len[] = |
| {0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0}; |
| static const unsigned char dc_chromi_val[] = |
| {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}; |
| |
| static const unsigned char ac_lumi_len[] = |
| {0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d}; |
| static const unsigned char ac_lumi_val[] = |
| {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 unsigned char ac_chromi_len[] = |
| {0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77}; |
| static const unsigned char ac_chromi_val[] = |
| {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}; |
| |
| #define COPY_HUFF_TABLE(dinfo,tbl,name) do { \ |
| if(dinfo->tbl == NULL) dinfo->tbl = jpeg_alloc_huff_table((j_common_ptr)dinfo); \ |
| memcpy(dinfo->tbl->bits, name##_len, sizeof(name##_len)); \ |
| memset(dinfo->tbl->huffval, 0, sizeof(dinfo->tbl->huffval)); \ |
| memcpy(dinfo->tbl->huffval, name##_val, sizeof(name##_val)); \ |
| } while(0) |
| |
| static void insert_huff_tables(j_decompress_ptr dinfo) { |
| COPY_HUFF_TABLE(dinfo, dc_huff_tbl_ptrs[0], dc_lumi); |
| COPY_HUFF_TABLE(dinfo, dc_huff_tbl_ptrs[1], dc_chromi); |
| COPY_HUFF_TABLE(dinfo, ac_huff_tbl_ptrs[0], ac_lumi); |
| COPY_HUFF_TABLE(dinfo, ac_huff_tbl_ptrs[1], ac_chromi); |
| } |
| |
| /** @brief Convert an MJPEG frame to RGB |
| * @ingroup frame |
| * |
| * @param in MJPEG frame |
| * @param out RGB frame |
| */ |
| uvc_error_t uvc_mjpeg2rgb(uvc_frame_t *in, uvc_frame_t *out) { |
| struct jpeg_decompress_struct dinfo; |
| struct error_mgr jerr; |
| size_t lines_read; |
| |
| if (in->frame_format != UVC_FRAME_FORMAT_MJPEG) |
| return UVC_ERROR_INVALID_PARAM; |
| |
| if (uvc_ensure_frame_size(out, in->width * in->height * 3) < 0) |
| return UVC_ERROR_NO_MEM; |
| |
| out->width = in->width; |
| out->height = in->height; |
| out->frame_format = UVC_FRAME_FORMAT_RGB; |
| out->step = in->width * 3; |
| out->sequence = in->sequence; |
| out->capture_time = in->capture_time; |
| out->source = in->source; |
| |
| dinfo.err = jpeg_std_error(&jerr.super); |
| jerr.super.error_exit = _error_exit; |
| |
| if (setjmp(jerr.jmp)) { |
| goto fail; |
| } |
| |
| jpeg_create_decompress(&dinfo); |
| jpeg_mem_src(&dinfo, in->data, in->data_bytes); |
| jpeg_read_header(&dinfo, TRUE); |
| |
| if (dinfo.dc_huff_tbl_ptrs[0] == NULL) { |
| /* This frame is missing the Huffman tables: fill in the standard ones */ |
| insert_huff_tables(&dinfo); |
| } |
| |
| dinfo.out_color_space = JCS_RGB; |
| dinfo.dct_method = JDCT_IFAST; |
| |
| jpeg_start_decompress(&dinfo); |
| |
| lines_read = 0; |
| while (dinfo.output_scanline < dinfo.output_height) { |
| unsigned char *buffer[1] = {( unsigned char*) out->data + lines_read * out->step }; |
| int num_scanlines; |
| |
| num_scanlines = jpeg_read_scanlines(&dinfo, buffer, 1); |
| lines_read += num_scanlines; |
| } |
| |
| jpeg_finish_decompress(&dinfo); |
| jpeg_destroy_decompress(&dinfo); |
| return 0; |
| |
| fail: |
| jpeg_destroy_decompress(&dinfo); |
| return UVC_ERROR_OTHER; |
| } |