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Diffstat (limited to 'camera/Decoder_libjpeg.cpp')
| -rw-r--r-- | camera/Decoder_libjpeg.cpp | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/camera/Decoder_libjpeg.cpp b/camera/Decoder_libjpeg.cpp new file mode 100644 index 0000000..35c343f --- /dev/null +++ b/camera/Decoder_libjpeg.cpp @@ -0,0 +1,301 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "Decoder_libjpeg.h" + +extern "C" { + #include "jpeglib.h" + #include "jerror.h" +} + +#define NUM_COMPONENTS_IN_YUV 3 + +namespace Ti { +namespace Camera { + +/* JPEG DHT Segment omitted from MJPEG data */ +static unsigned char jpeg_odml_dht[0x1a6] = { + 0xff, 0xd8, /* Start of Image */ + 0xff, 0xc4, 0x01, 0xa2, /* Define Huffman Table */ + + 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, + + 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, + + 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7d, + 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, + + 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, + 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 +}; + +struct libjpeg_source_mgr : jpeg_source_mgr { + libjpeg_source_mgr(unsigned char *buffer_ptr, int len); + ~libjpeg_source_mgr(); + + unsigned char *mBufferPtr; + int mFilledLen; +}; + +static void libjpeg_init_source(j_decompress_ptr cinfo) { + libjpeg_source_mgr* src = (libjpeg_source_mgr*)cinfo->src; + src->next_input_byte = (const JOCTET*)src->mBufferPtr; + src->bytes_in_buffer = 0; + src->current_offset = 0; +} + +static boolean libjpeg_seek_input_data(j_decompress_ptr cinfo, long byte_offset) { + libjpeg_source_mgr* src = (libjpeg_source_mgr*)cinfo->src; + src->current_offset = byte_offset; + src->next_input_byte = (const JOCTET*)src->mBufferPtr + byte_offset; + src->bytes_in_buffer = 0; + return TRUE; +} + +static boolean libjpeg_fill_input_buffer(j_decompress_ptr cinfo) { + libjpeg_source_mgr* src = (libjpeg_source_mgr*)cinfo->src; + src->current_offset += src->mFilledLen; + src->next_input_byte = src->mBufferPtr; + src->bytes_in_buffer = src->mFilledLen; + return TRUE; +} + +static void libjpeg_skip_input_data(j_decompress_ptr cinfo, long num_bytes) { + libjpeg_source_mgr* src = (libjpeg_source_mgr*)cinfo->src; + + if (num_bytes > (long)src->bytes_in_buffer) { + CAMHAL_LOGEA("\n\n\n libjpeg_skip_input_data - num_bytes > (long)src->bytes_in_buffer \n\n\n"); + } else { + src->next_input_byte += num_bytes; + src->bytes_in_buffer -= num_bytes; + } +} + +static boolean libjpeg_resync_to_restart(j_decompress_ptr cinfo, int desired) { + libjpeg_source_mgr* src = (libjpeg_source_mgr*)cinfo->src; + src->next_input_byte = (const JOCTET*)src->mBufferPtr; + src->bytes_in_buffer = 0; + return TRUE; +} + +static void libjpeg_term_source(j_decompress_ptr /*cinfo*/) {} + +libjpeg_source_mgr::libjpeg_source_mgr(unsigned char *buffer_ptr, int len) : mBufferPtr(buffer_ptr), mFilledLen(len) { + init_source = libjpeg_init_source; + fill_input_buffer = libjpeg_fill_input_buffer; + skip_input_data = libjpeg_skip_input_data; + resync_to_restart = libjpeg_resync_to_restart; + term_source = libjpeg_term_source; + seek_input_data = libjpeg_seek_input_data; +} + +libjpeg_source_mgr::~libjpeg_source_mgr() {} + +Decoder_libjpeg::Decoder_libjpeg() +{ + mWidth = 0; + mHeight = 0; + Y_Plane = NULL; + U_Plane = NULL; + V_Plane = NULL; + UV_Plane = NULL; +} + +Decoder_libjpeg::~Decoder_libjpeg() +{ + release(); +} + +void Decoder_libjpeg::release() +{ + if (Y_Plane) { + free(Y_Plane); + Y_Plane = NULL; + } + if (U_Plane) { + free(U_Plane); + U_Plane = NULL; + } + if (V_Plane) { + free(V_Plane); + V_Plane = NULL; + } + if (UV_Plane) { + free(UV_Plane); + UV_Plane = NULL; + } +} + +int Decoder_libjpeg::readDHTSize() +{ + return sizeof(jpeg_odml_dht); +} + +// 0xFF 0xC4 - DHT (Define Huffman Table) marker +// 0xFF 0xD9 - SOI (Start Of Image) marker +// 0xFF 0xD9 - EOI (End Of Image) marker +// This function return true if if found DHT +bool Decoder_libjpeg::isDhtExist(unsigned char *jpeg_src, int filled_len) { + if (filled_len <= 0) { + return false; + } + + for (int i = 1; i < filled_len; i++) { + if((jpeg_src[i - 1] == 0xFF) && (jpeg_src[i] == 0xC4)) { + CAMHAL_LOGD("Found DHT (Define Huffman Table) marker"); + return true; + } + } + return false; +} + +int Decoder_libjpeg::appendDHT(unsigned char *jpeg_src, int filled_len, unsigned char *jpeg_with_dht_buffer, int buff_size) +{ + /* Appending DHT to JPEG */ + + int len = filled_len + sizeof(jpeg_odml_dht) - 2; // final length of jpeg data + if (len > buff_size) { + CAMHAL_LOGEA("\n\n\n Buffer size too small. filled_len=%d, buff_size=%d, sizeof(jpeg_odml_dht)=%d\n\n\n", filled_len, buff_size, sizeof(jpeg_odml_dht)); + return 0; + } + + memcpy(jpeg_with_dht_buffer, jpeg_odml_dht, sizeof(jpeg_odml_dht)); + memcpy((jpeg_with_dht_buffer + sizeof(jpeg_odml_dht)), jpeg_src + 2, (filled_len - 2)); + return len; +} + + +bool Decoder_libjpeg::decode(unsigned char *jpeg_src, int filled_len, unsigned char *nv12_buffer, int stride) +{ + struct jpeg_decompress_struct cinfo; + struct jpeg_error_mgr jerr; + struct libjpeg_source_mgr s_mgr(jpeg_src, filled_len); + + if (filled_len == 0) + return false; + + cinfo.err = jpeg_std_error(&jerr); + jpeg_create_decompress(&cinfo); + + cinfo.src = &s_mgr; + int status = jpeg_read_header(&cinfo, true); + if (status != JPEG_HEADER_OK) { + CAMHAL_LOGEA("jpeg header corrupted"); + return false; + } + + cinfo.out_color_space = JCS_YCbCr; + cinfo.raw_data_out = true; + status = jpeg_start_decompress(&cinfo); + if (!status){ + CAMHAL_LOGEA("jpeg_start_decompress failed"); + return false; + } + + if (mWidth == 0){ + mWidth = cinfo.output_width; + mHeight = cinfo.output_height; + CAMHAL_LOGEA("w x h = %d x %d. stride=%d", cinfo.output_width, cinfo.output_height, stride); + } + else if ((cinfo.output_width > mWidth) || (cinfo.output_height > mHeight)) { + CAMHAL_LOGEA(" Free the existing buffers so that they are reallocated for new w x h. Old WxH = %dx%d. New WxH = %dx%d", + mWidth, mHeight, cinfo.output_width, cinfo.output_height); + release(); + mWidth = cinfo.output_width; + mHeight = cinfo.output_height; + } + + unsigned int decoded_uv_buffer_size = cinfo.output_width * cinfo.output_height / 2; + if (Y_Plane == NULL)Y_Plane = (unsigned char **)malloc(cinfo.output_height * sizeof(unsigned char *)); + if (U_Plane == NULL)U_Plane = (unsigned char **)malloc(cinfo.output_height * sizeof(unsigned char *)); + if (V_Plane == NULL)V_Plane = (unsigned char **)malloc(cinfo.output_height * sizeof(unsigned char *)); + if (UV_Plane == NULL) UV_Plane = (unsigned char *)malloc(decoded_uv_buffer_size); + + unsigned char **YUV_Planes[NUM_COMPONENTS_IN_YUV]; + YUV_Planes[0] = Y_Plane; + YUV_Planes[1] = U_Plane; + YUV_Planes[2] = V_Plane; + + unsigned char *row = &nv12_buffer[0]; + + // Y Component + for (unsigned int j = 0; j < cinfo.output_height; j++, row += stride) + YUV_Planes[0][j] = row; + + row = &UV_Plane[0]; + + // U Component + for (unsigned int j = 0; j < cinfo.output_height; j+=2, row += cinfo.output_width / 2){ + YUV_Planes[1][j+0] = row; + YUV_Planes[1][j+1] = row; + } + + // V Component + for (unsigned int j = 0; j < cinfo.output_height; j+=2, row += cinfo.output_width / 2){ + YUV_Planes[2][j+0] = row; + YUV_Planes[2][j+1] = row; + } + + // Interleaving U and V + for (unsigned int i = 0; i < cinfo.output_height; i += 8) { + jpeg_read_raw_data(&cinfo, YUV_Planes, 8); + YUV_Planes[0] += 8; + YUV_Planes[1] += 8; + YUV_Planes[2] += 8; + } + + unsigned char *uv_ptr = nv12_buffer + (stride * cinfo.output_height); + unsigned char *u_ptr = UV_Plane; + unsigned char *v_ptr = UV_Plane + (decoded_uv_buffer_size / 2); + for(unsigned int i = 0; i < cinfo.output_height / 2; i++){ + for(unsigned int j = 0; j < cinfo.output_width; j+=2){ + *(uv_ptr + j) = *u_ptr; u_ptr++; + *(uv_ptr + j + 1) = *v_ptr; v_ptr++; + } + uv_ptr = uv_ptr + stride; + } + + jpeg_finish_decompress(&cinfo); + jpeg_destroy_decompress(&cinfo); + + return true; +} + +} // namespace Camera +} // namespace Ti + |