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-rw-r--r--media/libjpeg/jpegint.h375
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diff --git a/media/libjpeg/jpegint.h b/media/libjpeg/jpegint.h
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+/*
+ * jpegint.h
+ *
+ * This file was part of the Independent JPEG Group's software:
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * Modified 1997-2009 by Guido Vollbeding.
+ * libjpeg-turbo Modifications:
+ * Copyright (C) 2015-2016, 2019, 2021, D. R. Commander.
+ * Copyright (C) 2015, Google, Inc.
+ * Copyright (C) 2021, Alex Richardson.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
+ *
+ * This file provides common declarations for the various JPEG modules.
+ * These declarations are considered internal to the JPEG library; most
+ * applications using the library shouldn't need to include this file.
+ */
+
+
+/* Declarations for both compression & decompression */
+
+typedef enum { /* Operating modes for buffer controllers */
+ JBUF_PASS_THRU, /* Plain stripwise operation */
+ /* Remaining modes require a full-image buffer to have been created */
+ JBUF_SAVE_SOURCE, /* Run source subobject only, save output */
+ JBUF_CRANK_DEST, /* Run dest subobject only, using saved data */
+ JBUF_SAVE_AND_PASS /* Run both subobjects, save output */
+} J_BUF_MODE;
+
+/* Values of global_state field (jdapi.c has some dependencies on ordering!) */
+#define CSTATE_START 100 /* after create_compress */
+#define CSTATE_SCANNING 101 /* start_compress done, write_scanlines OK */
+#define CSTATE_RAW_OK 102 /* start_compress done, write_raw_data OK */
+#define CSTATE_WRCOEFS 103 /* jpeg_write_coefficients done */
+#define DSTATE_START 200 /* after create_decompress */
+#define DSTATE_INHEADER 201 /* reading header markers, no SOS yet */
+#define DSTATE_READY 202 /* found SOS, ready for start_decompress */
+#define DSTATE_PRELOAD 203 /* reading multiscan file in start_decompress*/
+#define DSTATE_PRESCAN 204 /* performing dummy pass for 2-pass quant */
+#define DSTATE_SCANNING 205 /* start_decompress done, read_scanlines OK */
+#define DSTATE_RAW_OK 206 /* start_decompress done, read_raw_data OK */
+#define DSTATE_BUFIMAGE 207 /* expecting jpeg_start_output */
+#define DSTATE_BUFPOST 208 /* looking for SOS/EOI in jpeg_finish_output */
+#define DSTATE_RDCOEFS 209 /* reading file in jpeg_read_coefficients */
+#define DSTATE_STOPPING 210 /* looking for EOI in jpeg_finish_decompress */
+
+
+/* JLONG must hold at least signed 32-bit values. */
+typedef long JLONG;
+
+/* JUINTPTR must hold pointer values. */
+#ifdef __UINTPTR_TYPE__
+/*
+ * __UINTPTR_TYPE__ is GNU-specific and available in GCC 4.6+ and Clang 3.0+.
+ * Fortunately, that is sufficient to support the few architectures for which
+ * sizeof(void *) != sizeof(size_t). The only other options would require C99
+ * or Clang-specific builtins.
+ */
+typedef __UINTPTR_TYPE__ JUINTPTR;
+#else
+typedef size_t JUINTPTR;
+#endif
+
+/*
+ * Left shift macro that handles a negative operand without causing any
+ * sanitizer warnings
+ */
+
+#define LEFT_SHIFT(a, b) ((JLONG)((unsigned long)(a) << (b)))
+
+
+/* Declarations for compression modules */
+
+/* Master control module */
+struct jpeg_comp_master {
+ void (*prepare_for_pass) (j_compress_ptr cinfo);
+ void (*pass_startup) (j_compress_ptr cinfo);
+ void (*finish_pass) (j_compress_ptr cinfo);
+
+ /* State variables made visible to other modules */
+ boolean call_pass_startup; /* True if pass_startup must be called */
+ boolean is_last_pass; /* True during last pass */
+};
+
+/* Main buffer control (downsampled-data buffer) */
+struct jpeg_c_main_controller {
+ void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
+ void (*process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
+ JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail);
+};
+
+/* Compression preprocessing (downsampling input buffer control) */
+struct jpeg_c_prep_controller {
+ void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
+ void (*pre_process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
+ JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail,
+ JSAMPIMAGE output_buf,
+ JDIMENSION *out_row_group_ctr,
+ JDIMENSION out_row_groups_avail);
+};
+
+/* Coefficient buffer control */
+struct jpeg_c_coef_controller {
+ void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
+ boolean (*compress_data) (j_compress_ptr cinfo, JSAMPIMAGE input_buf);
+};
+
+/* Colorspace conversion */
+struct jpeg_color_converter {
+ void (*start_pass) (j_compress_ptr cinfo);
+ void (*color_convert) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
+ JSAMPIMAGE output_buf, JDIMENSION output_row,
+ int num_rows);
+};
+
+/* Downsampling */
+struct jpeg_downsampler {
+ void (*start_pass) (j_compress_ptr cinfo);
+ void (*downsample) (j_compress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_index, JSAMPIMAGE output_buf,
+ JDIMENSION out_row_group_index);
+
+ boolean need_context_rows; /* TRUE if need rows above & below */
+};
+
+/* Forward DCT (also controls coefficient quantization) */
+struct jpeg_forward_dct {
+ void (*start_pass) (j_compress_ptr cinfo);
+ /* perhaps this should be an array??? */
+ void (*forward_DCT) (j_compress_ptr cinfo, jpeg_component_info *compptr,
+ JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+ JDIMENSION start_row, JDIMENSION start_col,
+ JDIMENSION num_blocks);
+};
+
+/* Entropy encoding */
+struct jpeg_entropy_encoder {
+ void (*start_pass) (j_compress_ptr cinfo, boolean gather_statistics);
+ boolean (*encode_mcu) (j_compress_ptr cinfo, JBLOCKROW *MCU_data);
+ void (*finish_pass) (j_compress_ptr cinfo);
+};
+
+/* Marker writing */
+struct jpeg_marker_writer {
+ void (*write_file_header) (j_compress_ptr cinfo);
+ void (*write_frame_header) (j_compress_ptr cinfo);
+ void (*write_scan_header) (j_compress_ptr cinfo);
+ void (*write_file_trailer) (j_compress_ptr cinfo);
+ void (*write_tables_only) (j_compress_ptr cinfo);
+ /* These routines are exported to allow insertion of extra markers */
+ /* Probably only COM and APPn markers should be written this way */
+ void (*write_marker_header) (j_compress_ptr cinfo, int marker,
+ unsigned int datalen);
+ void (*write_marker_byte) (j_compress_ptr cinfo, int val);
+};
+
+
+/* Declarations for decompression modules */
+
+/* Master control module */
+struct jpeg_decomp_master {
+ void (*prepare_for_output_pass) (j_decompress_ptr cinfo);
+ void (*finish_output_pass) (j_decompress_ptr cinfo);
+
+ /* State variables made visible to other modules */
+ boolean is_dummy_pass; /* True during 1st pass for 2-pass quant */
+
+ /* Partial decompression variables */
+ JDIMENSION first_iMCU_col;
+ JDIMENSION last_iMCU_col;
+ JDIMENSION first_MCU_col[MAX_COMPONENTS];
+ JDIMENSION last_MCU_col[MAX_COMPONENTS];
+ boolean jinit_upsampler_no_alloc;
+
+ /* Last iMCU row that was successfully decoded */
+ JDIMENSION last_good_iMCU_row;
+};
+
+/* Input control module */
+struct jpeg_input_controller {
+ int (*consume_input) (j_decompress_ptr cinfo);
+ void (*reset_input_controller) (j_decompress_ptr cinfo);
+ void (*start_input_pass) (j_decompress_ptr cinfo);
+ void (*finish_input_pass) (j_decompress_ptr cinfo);
+
+ /* State variables made visible to other modules */
+ boolean has_multiple_scans; /* True if file has multiple scans */
+ boolean eoi_reached; /* True when EOI has been consumed */
+};
+
+/* Main buffer control (downsampled-data buffer) */
+struct jpeg_d_main_controller {
+ void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
+ void (*process_data) (j_decompress_ptr cinfo, JSAMPARRAY output_buf,
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
+};
+
+/* Coefficient buffer control */
+struct jpeg_d_coef_controller {
+ void (*start_input_pass) (j_decompress_ptr cinfo);
+ int (*consume_data) (j_decompress_ptr cinfo);
+ void (*start_output_pass) (j_decompress_ptr cinfo);
+ int (*decompress_data) (j_decompress_ptr cinfo, JSAMPIMAGE output_buf);
+ /* Pointer to array of coefficient virtual arrays, or NULL if none */
+ jvirt_barray_ptr *coef_arrays;
+};
+
+/* Decompression postprocessing (color quantization buffer control) */
+struct jpeg_d_post_controller {
+ void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
+ void (*post_process_data) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION *in_row_group_ctr,
+ JDIMENSION in_row_groups_avail,
+ JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+ JDIMENSION out_rows_avail);
+};
+
+/* Marker reading & parsing */
+struct jpeg_marker_reader {
+ void (*reset_marker_reader) (j_decompress_ptr cinfo);
+ /* Read markers until SOS or EOI.
+ * Returns same codes as are defined for jpeg_consume_input:
+ * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
+ */
+ int (*read_markers) (j_decompress_ptr cinfo);
+ /* Read a restart marker --- exported for use by entropy decoder only */
+ jpeg_marker_parser_method read_restart_marker;
+
+ /* State of marker reader --- nominally internal, but applications
+ * supplying COM or APPn handlers might like to know the state.
+ */
+ boolean saw_SOI; /* found SOI? */
+ boolean saw_SOF; /* found SOF? */
+ int next_restart_num; /* next restart number expected (0-7) */
+ unsigned int discarded_bytes; /* # of bytes skipped looking for a marker */
+};
+
+/* Entropy decoding */
+struct jpeg_entropy_decoder {
+ void (*start_pass) (j_decompress_ptr cinfo);
+ boolean (*decode_mcu) (j_decompress_ptr cinfo, JBLOCKROW *MCU_data);
+
+ /* This is here to share code between baseline and progressive decoders; */
+ /* other modules probably should not use it */
+ boolean insufficient_data; /* set TRUE after emitting warning */
+};
+
+/* Inverse DCT (also performs dequantization) */
+typedef void (*inverse_DCT_method_ptr) (j_decompress_ptr cinfo,
+ jpeg_component_info *compptr,
+ JCOEFPTR coef_block,
+ JSAMPARRAY output_buf,
+ JDIMENSION output_col);
+
+struct jpeg_inverse_dct {
+ void (*start_pass) (j_decompress_ptr cinfo);
+ /* It is useful to allow each component to have a separate IDCT method. */
+ inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
+};
+
+/* Upsampling (note that upsampler must also call color converter) */
+struct jpeg_upsampler {
+ void (*start_pass) (j_decompress_ptr cinfo);
+ void (*upsample) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION *in_row_group_ctr,
+ JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf,
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
+
+ boolean need_context_rows; /* TRUE if need rows above & below */
+};
+
+/* Colorspace conversion */
+struct jpeg_color_deconverter {
+ void (*start_pass) (j_decompress_ptr cinfo);
+ void (*color_convert) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION input_row, JSAMPARRAY output_buf,
+ int num_rows);
+};
+
+/* Color quantization or color precision reduction */
+struct jpeg_color_quantizer {
+ void (*start_pass) (j_decompress_ptr cinfo, boolean is_pre_scan);
+ void (*color_quantize) (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+ JSAMPARRAY output_buf, int num_rows);
+ void (*finish_pass) (j_decompress_ptr cinfo);
+ void (*new_color_map) (j_decompress_ptr cinfo);
+};
+
+
+/* Miscellaneous useful macros */
+
+#undef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#undef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+
+/* We assume that right shift corresponds to signed division by 2 with
+ * rounding towards minus infinity. This is correct for typical "arithmetic
+ * shift" instructions that shift in copies of the sign bit. But some
+ * C compilers implement >> with an unsigned shift. For these machines you
+ * must define RIGHT_SHIFT_IS_UNSIGNED.
+ * RIGHT_SHIFT provides a proper signed right shift of a JLONG quantity.
+ * It is only applied with constant shift counts. SHIFT_TEMPS must be
+ * included in the variables of any routine using RIGHT_SHIFT.
+ */
+
+#ifdef RIGHT_SHIFT_IS_UNSIGNED
+#define SHIFT_TEMPS JLONG shift_temp;
+#define RIGHT_SHIFT(x, shft) \
+ ((shift_temp = (x)) < 0 ? \
+ (shift_temp >> (shft)) | ((~((JLONG)0)) << (32 - (shft))) : \
+ (shift_temp >> (shft)))
+#else
+#define SHIFT_TEMPS
+#define RIGHT_SHIFT(x, shft) ((x) >> (shft))
+#endif
+
+
+/* Compression module initialization routines */
+EXTERN(void) jinit_compress_master(j_compress_ptr cinfo);
+EXTERN(void) jinit_c_master_control(j_compress_ptr cinfo,
+ boolean transcode_only);
+EXTERN(void) jinit_c_main_controller(j_compress_ptr cinfo,
+ boolean need_full_buffer);
+EXTERN(void) jinit_c_prep_controller(j_compress_ptr cinfo,
+ boolean need_full_buffer);
+EXTERN(void) jinit_c_coef_controller(j_compress_ptr cinfo,
+ boolean need_full_buffer);
+EXTERN(void) jinit_color_converter(j_compress_ptr cinfo);
+EXTERN(void) jinit_downsampler(j_compress_ptr cinfo);
+EXTERN(void) jinit_forward_dct(j_compress_ptr cinfo);
+EXTERN(void) jinit_huff_encoder(j_compress_ptr cinfo);
+EXTERN(void) jinit_phuff_encoder(j_compress_ptr cinfo);
+EXTERN(void) jinit_arith_encoder(j_compress_ptr cinfo);
+EXTERN(void) jinit_marker_writer(j_compress_ptr cinfo);
+/* Decompression module initialization routines */
+EXTERN(void) jinit_master_decompress(j_decompress_ptr cinfo);
+EXTERN(void) jinit_d_main_controller(j_decompress_ptr cinfo,
+ boolean need_full_buffer);
+EXTERN(void) jinit_d_coef_controller(j_decompress_ptr cinfo,
+ boolean need_full_buffer);
+EXTERN(void) jinit_d_post_controller(j_decompress_ptr cinfo,
+ boolean need_full_buffer);
+EXTERN(void) jinit_input_controller(j_decompress_ptr cinfo);
+EXTERN(void) jinit_marker_reader(j_decompress_ptr cinfo);
+EXTERN(void) jinit_huff_decoder(j_decompress_ptr cinfo);
+EXTERN(void) jinit_phuff_decoder(j_decompress_ptr cinfo);
+EXTERN(void) jinit_arith_decoder(j_decompress_ptr cinfo);
+EXTERN(void) jinit_inverse_dct(j_decompress_ptr cinfo);
+EXTERN(void) jinit_upsampler(j_decompress_ptr cinfo);
+EXTERN(void) jinit_color_deconverter(j_decompress_ptr cinfo);
+EXTERN(void) jinit_1pass_quantizer(j_decompress_ptr cinfo);
+EXTERN(void) jinit_2pass_quantizer(j_decompress_ptr cinfo);
+EXTERN(void) jinit_merged_upsampler(j_decompress_ptr cinfo);
+/* Memory manager initialization */
+EXTERN(void) jinit_memory_mgr(j_common_ptr cinfo);
+
+/* Utility routines in jutils.c */
+EXTERN(long) jdiv_round_up(long a, long b);
+EXTERN(long) jround_up(long a, long b);
+EXTERN(void) jcopy_sample_rows(JSAMPARRAY input_array, int source_row,
+ JSAMPARRAY output_array, int dest_row,
+ int num_rows, JDIMENSION num_cols);
+EXTERN(void) jcopy_block_row(JBLOCKROW input_row, JBLOCKROW output_row,
+ JDIMENSION num_blocks);
+EXTERN(void) jzero_far(void *target, size_t bytestozero);
+/* Constant tables in jutils.c */
+#if 0 /* This table is not actually needed in v6a */
+extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
+#endif
+extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
+
+/* Arithmetic coding probability estimation tables in jaricom.c */
+extern const JLONG jpeg_aritab[];