Remove engine file; add icon support; add QOI and QOA support
This commit is contained in:
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53ceb9bbf7
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a58da54994
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@ -1,51 +0,0 @@
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#include "engine.h"
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#define STB_DS_IMPLEMENTATION
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#include <stb_ds.h>
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#define STB_TRUETYPE_IMPLEMENTATION
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#include <stb_truetype.h>
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#define STB_IMAGE_IMPLEMENTATION
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#define STBI_FAILURE_USERMSG
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#include "stb_image.h"
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#define STB_IMAGE_WRITE_IMPLEMENTATION
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#include "stb_image_write.h"
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#define PL_MPEG_IMPLEMENTATION
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#include <pl_mpeg.h>
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#include "render.h"
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#include "2dphysics.h"
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#include "camera.h"
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#include "gameobject.h"
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#include "input.h"
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#include "log.h"
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#include "openglrender.h"
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#include "resources.h"
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#include "script.h"
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#include "sprite.h"
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#include "timer.h"
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#include "window.h"
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#include "sound.h"
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#include "engine.h"
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void error_callback(int error, const char *description) {
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fprintf(stderr, "Error: %s\n", description);
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YughError("GLFW Error: %s", description);
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}
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void engine_init() {
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resources_init();
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YughInfo("Starting physics ...");
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phys2d_init();
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YughInfo("Starting sound ...");
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sound_init();
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YughInfo("Starting scripts ...");
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script_init();
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}
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@ -1,10 +0,0 @@
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#ifndef ENGINE_H
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#define ENGINE_H
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extern double renderMS;
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extern double physMS;
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extern double updateMS;
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void engine_init();
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#endif
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@ -5,7 +5,6 @@
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#include "anim.h"
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#include "debug.h"
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#include "debugdraw.h"
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#include "engine.h"
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#include "font.h"
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#include "gameobject.h"
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#include "input.h"
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@ -114,8 +114,25 @@ static sg_trace_hooks hooks = {
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.destroy_shader = destroy_shader,
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};
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void sg_logging(const char *tag, uint32_t lvl, uint32_t id, const char *msg, uint32_t line, const char *file, void *data) {
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// mYughLog(0, 1, line, file, "tag: %s, msg: %s", tag, sg);
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}
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void openglInit() {
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mainwin.width = sapp_width();
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mainwin.height = sapp_height();
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sg_setup(&(sg_desc){
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.logger = {
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.func = sg_logging,
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.user_data = NULL,
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},
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.buffer_pool_size = 1024,
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.context.sample_count = 1,
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});
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sg_trace_hooks hh = sg_install_trace_hooks(&hooks);
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font_init(NULL);
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728
source/engine/qoa.h
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728
source/engine/qoa.h
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@ -0,0 +1,728 @@
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/*
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Copyright (c) 2023, Dominic Szablewski - https://phoboslab.org
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SPDX-License-Identifier: MIT
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QOA - The "Quite OK Audio" format for fast, lossy audio compression
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-- Data Format
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QOA encodes pulse-code modulated (PCM) audio data with up to 255 channels,
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sample rates from 1 up to 16777215 hertz and a bit depth of 16 bits.
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The compression method employed in QOA is lossy; it discards some information
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from the uncompressed PCM data. For many types of audio signals this compression
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is "transparent", i.e. the difference from the original file is often not
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audible.
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QOA encodes 20 samples of 16 bit PCM data into slices of 64 bits. A single
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sample therefore requires 3.2 bits of storage space, resulting in a 5x
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compression (16 / 3.2).
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A QOA file consists of an 8 byte file header, followed by a number of frames.
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Each frame contains an 8 byte frame header, the current 16 byte en-/decoder
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state per channel and 256 slices per channel. Each slice is 8 bytes wide and
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encodes 20 samples of audio data.
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All values, including the slices, are big endian. The file layout is as follows:
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struct {
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struct {
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char magic[4]; // magic bytes "qoaf"
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uint32_t samples; // samples per channel in this file
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} file_header;
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struct {
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struct {
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uint8_t num_channels; // no. of channels
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uint24_t samplerate; // samplerate in hz
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uint16_t fsamples; // samples per channel in this frame
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uint16_t fsize; // frame size (includes this header)
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} frame_header;
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struct {
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int16_t history[4]; // most recent last
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int16_t weights[4]; // most recent last
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} lms_state[num_channels];
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qoa_slice_t slices[256][num_channels];
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} frames[ceil(samples / (256 * 20))];
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} qoa_file_t;
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Each `qoa_slice_t` contains a quantized scalefactor `sf_quant` and 20 quantized
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residuals `qrNN`:
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.- QOA_SLICE -- 64 bits, 20 samples --------------------------/ /------------.
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| Byte[0] | Byte[1] | Byte[2] \ \ Byte[7] |
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| 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 | 7 6 5 / / 2 1 0 |
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|------------+--------+--------+--------+---------+---------+-\ \--+---------|
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| sf_quant | qr00 | qr01 | qr02 | qr03 | qr04 | / / | qr19 |
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`-------------------------------------------------------------\ \------------`
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Each frame except the last must contain exactly 256 slices per channel. The last
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frame may contain between 1 .. 256 (inclusive) slices per channel. The last
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slice (for each channel) in the last frame may contain less than 20 samples; the
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slice still must be 8 bytes wide, with the unused samples zeroed out.
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Channels are interleaved per slice. E.g. for 2 channel stereo:
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slice[0] = L, slice[1] = R, slice[2] = L, slice[3] = R ...
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A valid QOA file or stream must have at least one frame. Each frame must contain
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at least one channel and one sample with a samplerate between 1 .. 16777215
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(inclusive).
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If the total number of samples is not known by the encoder, the samples in the
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file header may be set to 0x00000000 to indicate that the encoder is
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"streaming". In a streaming context, the samplerate and number of channels may
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differ from frame to frame. For static files (those with samples set to a
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non-zero value), each frame must have the same number of channels and same
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samplerate.
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Note that this implementation of QOA only handles files with a known total
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number of samples.
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A decoder should support at least 8 channels. The channel layout for channel
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counts 1 .. 8 is:
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1. Mono
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2. L, R
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3. L, R, C
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4. FL, FR, B/SL, B/SR
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5. FL, FR, C, B/SL, B/SR
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6. FL, FR, C, LFE, B/SL, B/SR
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7. FL, FR, C, LFE, B, SL, SR
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8. FL, FR, C, LFE, BL, BR, SL, SR
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QOA predicts each audio sample based on the previously decoded ones using a
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"Sign-Sign Least Mean Squares Filter" (LMS). This prediction plus the
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dequantized residual forms the final output sample.
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*/
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/* -----------------------------------------------------------------------------
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Header - Public functions */
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#ifndef QOA_H
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#define QOA_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define QOA_MIN_FILESIZE 16
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#define QOA_MAX_CHANNELS 8
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#define QOA_SLICE_LEN 20
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#define QOA_SLICES_PER_FRAME 256
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#define QOA_FRAME_LEN (QOA_SLICES_PER_FRAME * QOA_SLICE_LEN)
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#define QOA_LMS_LEN 4
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#define QOA_MAGIC 0x716f6166 /* 'qoaf' */
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#define QOA_FRAME_SIZE(channels, slices) \
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(8 + QOA_LMS_LEN * 4 * channels + 8 * slices * channels)
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typedef struct {
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int history[QOA_LMS_LEN];
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int weights[QOA_LMS_LEN];
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} qoa_lms_t;
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typedef struct {
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unsigned int channels;
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unsigned int samplerate;
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unsigned int samples;
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qoa_lms_t lms[QOA_MAX_CHANNELS];
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#ifdef QOA_RECORD_TOTAL_ERROR
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double error;
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#endif
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} qoa_desc;
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unsigned int qoa_encode_header(qoa_desc *qoa, unsigned char *bytes);
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unsigned int qoa_encode_frame(const short *sample_data, qoa_desc *qoa, unsigned int frame_len, unsigned char *bytes);
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void *qoa_encode(const short *sample_data, qoa_desc *qoa, unsigned int *out_len);
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unsigned int qoa_max_frame_size(qoa_desc *qoa);
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unsigned int qoa_decode_header(const unsigned char *bytes, int size, qoa_desc *qoa);
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unsigned int qoa_decode_frame(const unsigned char *bytes, unsigned int size, qoa_desc *qoa, short *sample_data, unsigned int *frame_len);
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short *qoa_decode(const unsigned char *bytes, int size, qoa_desc *file);
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#ifndef QOA_NO_STDIO
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int qoa_write(const char *filename, const short *sample_data, qoa_desc *qoa);
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void *qoa_read(const char *filename, qoa_desc *qoa);
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#endif /* QOA_NO_STDIO */
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#ifdef __cplusplus
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}
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#endif
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#endif /* QOA_H */
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/* -----------------------------------------------------------------------------
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Implementation */
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#ifdef QOA_IMPLEMENTATION
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#include <stdlib.h>
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#ifndef QOA_MALLOC
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#define QOA_MALLOC(sz) malloc(sz)
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#define QOA_FREE(p) free(p)
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#endif
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typedef unsigned long long qoa_uint64_t;
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/* The quant_tab provides an index into the dequant_tab for residuals in the
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range of -8 .. 8. It maps this range to just 3bits and becomes less accurate at
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the higher end. Note that the residual zero is identical to the lowest positive
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value. This is mostly fine, since the qoa_div() function always rounds away
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from zero. */
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static const int qoa_quant_tab[17] = {
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7, 7, 7, 5, 5, 3, 3, 1, /* -8..-1 */
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0, /* 0 */
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0, 2, 2, 4, 4, 6, 6, 6 /* 1.. 8 */
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};
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/* We have 16 different scalefactors. Like the quantized residuals these become
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less accurate at the higher end. In theory, the highest scalefactor that we
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would need to encode the highest 16bit residual is (2**16)/8 = 8192. However we
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rely on the LMS filter to predict samples accurately enough that a maximum
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residual of one quarter of the 16 bit range is sufficient. I.e. with the
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scalefactor 2048 times the quant range of 8 we can encode residuals up to 2**14.
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The scalefactor values are computed as:
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scalefactor_tab[s] <- round(pow(s + 1, 2.75)) */
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static const int qoa_scalefactor_tab[16] = {
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1, 7, 21, 45, 84, 138, 211, 304, 421, 562, 731, 928, 1157, 1419, 1715, 2048
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};
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/* The reciprocal_tab maps each of the 16 scalefactors to their rounded
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reciprocals 1/scalefactor. This allows us to calculate the scaled residuals in
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the encoder with just one multiplication instead of an expensive division. We
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do this in .16 fixed point with integers, instead of floats.
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The reciprocal_tab is computed as:
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reciprocal_tab[s] <- ((1<<16) + scalefactor_tab[s] - 1) / scalefactor_tab[s] */
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static const int qoa_reciprocal_tab[16] = {
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65536, 9363, 3121, 1457, 781, 475, 311, 216, 156, 117, 90, 71, 57, 47, 39, 32
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};
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/* The dequant_tab maps each of the scalefactors and quantized residuals to
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their unscaled & dequantized version.
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Since qoa_div rounds away from the zero, the smallest entries are mapped to 3/4
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instead of 1. The dequant_tab assumes the following dequantized values for each
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of the quant_tab indices and is computed as:
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float dqt[8] = {0.75, -0.75, 2.5, -2.5, 4.5, -4.5, 7, -7};
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dequant_tab[s][q] <- round_ties_away_from_zero(scalefactor_tab[s] * dqt[q])
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The rounding employed here is "to nearest, ties away from zero", i.e. positive
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and negative values are treated symmetrically.
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*/
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static const int qoa_dequant_tab[16][8] = {
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{ 1, -1, 3, -3, 5, -5, 7, -7},
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{ 5, -5, 18, -18, 32, -32, 49, -49},
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{ 16, -16, 53, -53, 95, -95, 147, -147},
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{ 34, -34, 113, -113, 203, -203, 315, -315},
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{ 63, -63, 210, -210, 378, -378, 588, -588},
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{ 104, -104, 345, -345, 621, -621, 966, -966},
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{ 158, -158, 528, -528, 950, -950, 1477, -1477},
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{ 228, -228, 760, -760, 1368, -1368, 2128, -2128},
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{ 316, -316, 1053, -1053, 1895, -1895, 2947, -2947},
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{ 422, -422, 1405, -1405, 2529, -2529, 3934, -3934},
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{ 548, -548, 1828, -1828, 3290, -3290, 5117, -5117},
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{ 696, -696, 2320, -2320, 4176, -4176, 6496, -6496},
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{ 868, -868, 2893, -2893, 5207, -5207, 8099, -8099},
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{1064, -1064, 3548, -3548, 6386, -6386, 9933, -9933},
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{1286, -1286, 4288, -4288, 7718, -7718, 12005, -12005},
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{1536, -1536, 5120, -5120, 9216, -9216, 14336, -14336},
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};
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/* The Least Mean Squares Filter is the heart of QOA. It predicts the next
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sample based on the previous 4 reconstructed samples. It does so by continuously
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adjusting 4 weights based on the residual of the previous prediction.
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The next sample is predicted as the sum of (weight[i] * history[i]).
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The adjustment of the weights is done with a "Sign-Sign-LMS" that adds or
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subtracts the residual to each weight, based on the corresponding sample from
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the history. This, surprisingly, is sufficient to get worthwhile predictions.
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This is all done with fixed point integers. Hence the right-shifts when updating
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the weights and calculating the prediction. */
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static int qoa_lms_predict(qoa_lms_t *lms) {
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int prediction = 0;
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for (int i = 0; i < QOA_LMS_LEN; i++) {
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prediction += lms->weights[i] * lms->history[i];
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}
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return prediction >> 13;
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}
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static void qoa_lms_update(qoa_lms_t *lms, int sample, int residual) {
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int delta = residual >> 4;
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for (int i = 0; i < QOA_LMS_LEN; i++) {
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lms->weights[i] += lms->history[i] < 0 ? -delta : delta;
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}
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for (int i = 0; i < QOA_LMS_LEN-1; i++) {
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lms->history[i] = lms->history[i+1];
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}
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lms->history[QOA_LMS_LEN-1] = sample;
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}
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/* qoa_div() implements a rounding division, but avoids rounding to zero for
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small numbers. E.g. 0.1 will be rounded to 1. Note that 0 itself still
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returns as 0, which is handled in the qoa_quant_tab[].
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qoa_div() takes an index into the .16 fixed point qoa_reciprocal_tab as an
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argument, so it can do the division with a cheaper integer multiplication. */
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static inline int qoa_div(int v, int scalefactor) {
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int reciprocal = qoa_reciprocal_tab[scalefactor];
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int n = (v * reciprocal + (1 << 15)) >> 16;
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n = n + ((v > 0) - (v < 0)) - ((n > 0) - (n < 0)); /* round away from 0 */
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return n;
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}
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static inline int qoa_clamp(int v, int min, int max) {
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if (v < min) { return min; }
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if (v > max) { return max; }
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return v;
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}
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/* This specialized clamp function for the signed 16 bit range improves decode
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performance quite a bit. The extra if() statement works nicely with the CPUs
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branch prediction as this branch is rarely taken. */
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static inline int qoa_clamp_s16(int v) {
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if ((unsigned int)(v + 32768) > 65535) {
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if (v < -32768) { return -32768; }
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if (v > 32767) { return 32767; }
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}
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return v;
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}
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static inline qoa_uint64_t qoa_read_u64(const unsigned char *bytes, unsigned int *p) {
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bytes += *p;
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*p += 8;
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return
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((qoa_uint64_t)(bytes[0]) << 56) | ((qoa_uint64_t)(bytes[1]) << 48) |
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((qoa_uint64_t)(bytes[2]) << 40) | ((qoa_uint64_t)(bytes[3]) << 32) |
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((qoa_uint64_t)(bytes[4]) << 24) | ((qoa_uint64_t)(bytes[5]) << 16) |
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((qoa_uint64_t)(bytes[6]) << 8) | ((qoa_uint64_t)(bytes[7]) << 0);
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}
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static inline void qoa_write_u64(qoa_uint64_t v, unsigned char *bytes, unsigned int *p) {
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bytes += *p;
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*p += 8;
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bytes[0] = (v >> 56) & 0xff;
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bytes[1] = (v >> 48) & 0xff;
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bytes[2] = (v >> 40) & 0xff;
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bytes[3] = (v >> 32) & 0xff;
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bytes[4] = (v >> 24) & 0xff;
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bytes[5] = (v >> 16) & 0xff;
|
||||
bytes[6] = (v >> 8) & 0xff;
|
||||
bytes[7] = (v >> 0) & 0xff;
|
||||
}
|
||||
|
||||
|
||||
/* -----------------------------------------------------------------------------
|
||||
Encoder */
|
||||
|
||||
unsigned int qoa_encode_header(qoa_desc *qoa, unsigned char *bytes) {
|
||||
unsigned int p = 0;
|
||||
qoa_write_u64(((qoa_uint64_t)QOA_MAGIC << 32) | qoa->samples, bytes, &p);
|
||||
return p;
|
||||
}
|
||||
|
||||
unsigned int qoa_encode_frame(const short *sample_data, qoa_desc *qoa, unsigned int frame_len, unsigned char *bytes) {
|
||||
unsigned int channels = qoa->channels;
|
||||
|
||||
unsigned int p = 0;
|
||||
unsigned int slices = (frame_len + QOA_SLICE_LEN - 1) / QOA_SLICE_LEN;
|
||||
unsigned int frame_size = QOA_FRAME_SIZE(channels, slices);
|
||||
int prev_scalefactor[QOA_MAX_CHANNELS] = {0};
|
||||
|
||||
/* Write the frame header */
|
||||
qoa_write_u64((
|
||||
(qoa_uint64_t)qoa->channels << 56 |
|
||||
(qoa_uint64_t)qoa->samplerate << 32 |
|
||||
(qoa_uint64_t)frame_len << 16 |
|
||||
(qoa_uint64_t)frame_size
|
||||
), bytes, &p);
|
||||
|
||||
|
||||
for (int c = 0; c < channels; c++) {
|
||||
/* If the weights have grown too large, reset them to 0. This may happen
|
||||
with certain high-frequency sounds. This is a last resort and will
|
||||
introduce quite a bit of noise, but should at least prevent pops/clicks */
|
||||
int weights_sum =
|
||||
qoa->lms[c].weights[0] * qoa->lms[c].weights[0] +
|
||||
qoa->lms[c].weights[1] * qoa->lms[c].weights[1] +
|
||||
qoa->lms[c].weights[2] * qoa->lms[c].weights[2] +
|
||||
qoa->lms[c].weights[3] * qoa->lms[c].weights[3];
|
||||
if (weights_sum > 0x2fffffff) {
|
||||
qoa->lms[c].weights[0] = 0;
|
||||
qoa->lms[c].weights[1] = 0;
|
||||
qoa->lms[c].weights[2] = 0;
|
||||
qoa->lms[c].weights[3] = 0;
|
||||
}
|
||||
|
||||
/* Write the current LMS state */
|
||||
qoa_uint64_t weights = 0;
|
||||
qoa_uint64_t history = 0;
|
||||
for (int i = 0; i < QOA_LMS_LEN; i++) {
|
||||
history = (history << 16) | (qoa->lms[c].history[i] & 0xffff);
|
||||
weights = (weights << 16) | (qoa->lms[c].weights[i] & 0xffff);
|
||||
}
|
||||
qoa_write_u64(history, bytes, &p);
|
||||
qoa_write_u64(weights, bytes, &p);
|
||||
}
|
||||
|
||||
/* We encode all samples with the channels interleaved on a slice level.
|
||||
E.g. for stereo: (ch-0, slice 0), (ch 1, slice 0), (ch 0, slice 1), ...*/
|
||||
for (int sample_index = 0; sample_index < frame_len; sample_index += QOA_SLICE_LEN) {
|
||||
|
||||
for (int c = 0; c < channels; c++) {
|
||||
int slice_len = qoa_clamp(QOA_SLICE_LEN, 0, frame_len - sample_index);
|
||||
int slice_start = sample_index * channels + c;
|
||||
int slice_end = (sample_index + slice_len) * channels + c;
|
||||
|
||||
/* Brute for search for the best scalefactor. Just go through all
|
||||
16 scalefactors, encode all samples for the current slice and
|
||||
meassure the total squared error. */
|
||||
qoa_uint64_t best_error = -1;
|
||||
qoa_uint64_t best_slice;
|
||||
qoa_lms_t best_lms;
|
||||
int best_scalefactor;
|
||||
|
||||
for (int sfi = 0; sfi < 16; sfi++) {
|
||||
/* There is a strong correlation between the scalefactors of
|
||||
neighboring slices. As an optimization, start testing
|
||||
the best scalefactor of the previous slice first. */
|
||||
int scalefactor = (sfi + prev_scalefactor[c]) % 16;
|
||||
|
||||
/* We have to reset the LMS state to the last known good one
|
||||
before trying each scalefactor, as each pass updates the LMS
|
||||
state when encoding. */
|
||||
qoa_lms_t lms = qoa->lms[c];
|
||||
qoa_uint64_t slice = scalefactor;
|
||||
qoa_uint64_t current_error = 0;
|
||||
|
||||
for (int si = slice_start; si < slice_end; si += channels) {
|
||||
int sample = sample_data[si];
|
||||
int predicted = qoa_lms_predict(&lms);
|
||||
|
||||
int residual = sample - predicted;
|
||||
int scaled = qoa_div(residual, scalefactor);
|
||||
int clamped = qoa_clamp(scaled, -8, 8);
|
||||
int quantized = qoa_quant_tab[clamped + 8];
|
||||
int dequantized = qoa_dequant_tab[scalefactor][quantized];
|
||||
int reconstructed = qoa_clamp_s16(predicted + dequantized);
|
||||
|
||||
long long error = (sample - reconstructed);
|
||||
current_error += error * error;
|
||||
if (current_error > best_error) {
|
||||
break;
|
||||
}
|
||||
|
||||
qoa_lms_update(&lms, reconstructed, dequantized);
|
||||
slice = (slice << 3) | quantized;
|
||||
}
|
||||
|
||||
if (current_error < best_error) {
|
||||
best_error = current_error;
|
||||
best_slice = slice;
|
||||
best_lms = lms;
|
||||
best_scalefactor = scalefactor;
|
||||
}
|
||||
}
|
||||
|
||||
prev_scalefactor[c] = best_scalefactor;
|
||||
|
||||
qoa->lms[c] = best_lms;
|
||||
#ifdef QOA_RECORD_TOTAL_ERROR
|
||||
qoa->error += best_error;
|
||||
#endif
|
||||
|
||||
/* If this slice was shorter than QOA_SLICE_LEN, we have to left-
|
||||
shift all encoded data, to ensure the rightmost bits are the empty
|
||||
ones. This should only happen in the last frame of a file as all
|
||||
slices are completely filled otherwise. */
|
||||
best_slice <<= (QOA_SLICE_LEN - slice_len) * 3;
|
||||
qoa_write_u64(best_slice, bytes, &p);
|
||||
}
|
||||
}
|
||||
|
||||
return p;
|
||||
}
|
||||
|
||||
void *qoa_encode(const short *sample_data, qoa_desc *qoa, unsigned int *out_len) {
|
||||
if (
|
||||
qoa->samples == 0 ||
|
||||
qoa->samplerate == 0 || qoa->samplerate > 0xffffff ||
|
||||
qoa->channels == 0 || qoa->channels > QOA_MAX_CHANNELS
|
||||
) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Calculate the encoded size and allocate */
|
||||
unsigned int num_frames = (qoa->samples + QOA_FRAME_LEN-1) / QOA_FRAME_LEN;
|
||||
unsigned int num_slices = (qoa->samples + QOA_SLICE_LEN-1) / QOA_SLICE_LEN;
|
||||
unsigned int encoded_size = 8 + /* 8 byte file header */
|
||||
num_frames * 8 + /* 8 byte frame headers */
|
||||
num_frames * QOA_LMS_LEN * 4 * qoa->channels + /* 4 * 4 bytes lms state per channel */
|
||||
num_slices * 8 * qoa->channels; /* 8 byte slices */
|
||||
|
||||
unsigned char *bytes = QOA_MALLOC(encoded_size);
|
||||
|
||||
for (int c = 0; c < qoa->channels; c++) {
|
||||
/* Set the initial LMS weights to {0, 0, -1, 2}. This helps with the
|
||||
prediction of the first few ms of a file. */
|
||||
qoa->lms[c].weights[0] = 0;
|
||||
qoa->lms[c].weights[1] = 0;
|
||||
qoa->lms[c].weights[2] = -(1<<13);
|
||||
qoa->lms[c].weights[3] = (1<<14);
|
||||
|
||||
/* Explicitly set the history samples to 0, as we might have some
|
||||
garbage in there. */
|
||||
for (int i = 0; i < QOA_LMS_LEN; i++) {
|
||||
qoa->lms[c].history[i] = 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Encode the header and go through all frames */
|
||||
unsigned int p = qoa_encode_header(qoa, bytes);
|
||||
#ifdef QOA_RECORD_TOTAL_ERROR
|
||||
qoa->error = 0;
|
||||
#endif
|
||||
|
||||
int frame_len = QOA_FRAME_LEN;
|
||||
for (int sample_index = 0; sample_index < qoa->samples; sample_index += frame_len) {
|
||||
frame_len = qoa_clamp(QOA_FRAME_LEN, 0, qoa->samples - sample_index);
|
||||
const short *frame_samples = sample_data + sample_index * qoa->channels;
|
||||
unsigned int frame_size = qoa_encode_frame(frame_samples, qoa, frame_len, bytes + p);
|
||||
p += frame_size;
|
||||
}
|
||||
|
||||
*out_len = p;
|
||||
return bytes;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* -----------------------------------------------------------------------------
|
||||
Decoder */
|
||||
|
||||
unsigned int qoa_max_frame_size(qoa_desc *qoa) {
|
||||
return QOA_FRAME_SIZE(qoa->channels, QOA_SLICES_PER_FRAME);
|
||||
}
|
||||
|
||||
unsigned int qoa_decode_header(const unsigned char *bytes, int size, qoa_desc *qoa) {
|
||||
unsigned int p = 0;
|
||||
if (size < QOA_MIN_FILESIZE) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* Read the file header, verify the magic number ('qoaf') and read the
|
||||
total number of samples. */
|
||||
qoa_uint64_t file_header = qoa_read_u64(bytes, &p);
|
||||
|
||||
if ((file_header >> 32) != QOA_MAGIC) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
qoa->samples = file_header & 0xffffffff;
|
||||
if (!qoa->samples) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Peek into the first frame header to get the number of channels and
|
||||
the samplerate. */
|
||||
qoa_uint64_t frame_header = qoa_read_u64(bytes, &p);
|
||||
qoa->channels = (frame_header >> 56) & 0x0000ff;
|
||||
qoa->samplerate = (frame_header >> 32) & 0xffffff;
|
||||
|
||||
if (qoa->channels == 0 || qoa->samples == 0 || qoa->samplerate == 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 8;
|
||||
}
|
||||
|
||||
unsigned int qoa_decode_frame(const unsigned char *bytes, unsigned int size, qoa_desc *qoa, short *sample_data, unsigned int *frame_len) {
|
||||
unsigned int p = 0;
|
||||
*frame_len = 0;
|
||||
|
||||
if (size < 8 + QOA_LMS_LEN * 4 * qoa->channels) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Read and verify the frame header */
|
||||
qoa_uint64_t frame_header = qoa_read_u64(bytes, &p);
|
||||
int channels = (frame_header >> 56) & 0x0000ff;
|
||||
int samplerate = (frame_header >> 32) & 0xffffff;
|
||||
int samples = (frame_header >> 16) & 0x00ffff;
|
||||
int frame_size = (frame_header ) & 0x00ffff;
|
||||
|
||||
int data_size = frame_size - 8 - QOA_LMS_LEN * 4 * channels;
|
||||
int num_slices = data_size / 8;
|
||||
int max_total_samples = num_slices * QOA_SLICE_LEN;
|
||||
|
||||
if (
|
||||
channels != qoa->channels ||
|
||||
samplerate != qoa->samplerate ||
|
||||
frame_size > size ||
|
||||
samples * channels > max_total_samples
|
||||
) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* Read the LMS state: 4 x 2 bytes history, 4 x 2 bytes weights per channel */
|
||||
for (int c = 0; c < channels; c++) {
|
||||
qoa_uint64_t history = qoa_read_u64(bytes, &p);
|
||||
qoa_uint64_t weights = qoa_read_u64(bytes, &p);
|
||||
for (int i = 0; i < QOA_LMS_LEN; i++) {
|
||||
qoa->lms[c].history[i] = ((signed short)(history >> 48));
|
||||
history <<= 16;
|
||||
qoa->lms[c].weights[i] = ((signed short)(weights >> 48));
|
||||
weights <<= 16;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Decode all slices for all channels in this frame */
|
||||
for (int sample_index = 0; sample_index < samples; sample_index += QOA_SLICE_LEN) {
|
||||
for (int c = 0; c < channels; c++) {
|
||||
qoa_uint64_t slice = qoa_read_u64(bytes, &p);
|
||||
|
||||
int scalefactor = (slice >> 60) & 0xf;
|
||||
int slice_start = sample_index * channels + c;
|
||||
int slice_end = qoa_clamp(sample_index + QOA_SLICE_LEN, 0, samples) * channels + c;
|
||||
|
||||
for (int si = slice_start; si < slice_end; si += channels) {
|
||||
int predicted = qoa_lms_predict(&qoa->lms[c]);
|
||||
int quantized = (slice >> 57) & 0x7;
|
||||
int dequantized = qoa_dequant_tab[scalefactor][quantized];
|
||||
int reconstructed = qoa_clamp_s16(predicted + dequantized);
|
||||
|
||||
sample_data[si] = reconstructed;
|
||||
slice <<= 3;
|
||||
|
||||
qoa_lms_update(&qoa->lms[c], reconstructed, dequantized);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
*frame_len = samples;
|
||||
return p;
|
||||
}
|
||||
|
||||
short *qoa_decode(const unsigned char *bytes, int size, qoa_desc *qoa) {
|
||||
unsigned int p = qoa_decode_header(bytes, size, qoa);
|
||||
if (!p) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Calculate the required size of the sample buffer and allocate */
|
||||
int total_samples = qoa->samples * qoa->channels;
|
||||
short *sample_data = QOA_MALLOC(total_samples * sizeof(short));
|
||||
|
||||
unsigned int sample_index = 0;
|
||||
unsigned int frame_len;
|
||||
unsigned int frame_size;
|
||||
|
||||
/* Decode all frames */
|
||||
do {
|
||||
short *sample_ptr = sample_data + sample_index * qoa->channels;
|
||||
frame_size = qoa_decode_frame(bytes + p, size - p, qoa, sample_ptr, &frame_len);
|
||||
|
||||
p += frame_size;
|
||||
sample_index += frame_len;
|
||||
} while (frame_size && sample_index < qoa->samples);
|
||||
|
||||
qoa->samples = sample_index;
|
||||
return sample_data;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* -----------------------------------------------------------------------------
|
||||
File read/write convenience functions */
|
||||
|
||||
#ifndef QOA_NO_STDIO
|
||||
#include <stdio.h>
|
||||
|
||||
int qoa_write(const char *filename, const short *sample_data, qoa_desc *qoa) {
|
||||
FILE *f = fopen(filename, "wb");
|
||||
unsigned int size;
|
||||
void *encoded;
|
||||
|
||||
if (!f) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
encoded = qoa_encode(sample_data, qoa, &size);
|
||||
if (!encoded) {
|
||||
fclose(f);
|
||||
return 0;
|
||||
}
|
||||
|
||||
fwrite(encoded, 1, size, f);
|
||||
fclose(f);
|
||||
|
||||
QOA_FREE(encoded);
|
||||
return size;
|
||||
}
|
||||
|
||||
void *qoa_read(const char *filename, qoa_desc *qoa) {
|
||||
FILE *f = fopen(filename, "rb");
|
||||
int size, bytes_read;
|
||||
void *data;
|
||||
short *sample_data;
|
||||
|
||||
if (!f) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
fseek(f, 0, SEEK_END);
|
||||
size = ftell(f);
|
||||
if (size <= 0) {
|
||||
fclose(f);
|
||||
return NULL;
|
||||
}
|
||||
fseek(f, 0, SEEK_SET);
|
||||
|
||||
data = QOA_MALLOC(size);
|
||||
if (!data) {
|
||||
fclose(f);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
bytes_read = fread(data, 1, size, f);
|
||||
fclose(f);
|
||||
|
||||
sample_data = qoa_decode(data, bytes_read, qoa);
|
||||
QOA_FREE(data);
|
||||
return sample_data;
|
||||
}
|
||||
|
||||
#endif /* QOA_NO_STDIO */
|
||||
#endif /* QOA_IMPLEMENTATION */
|
||||
649
source/engine/qoi.h
Normal file
649
source/engine/qoi.h
Normal file
|
|
@ -0,0 +1,649 @@
|
|||
/*
|
||||
|
||||
Copyright (c) 2021, Dominic Szablewski - https://phoboslab.org
|
||||
SPDX-License-Identifier: MIT
|
||||
|
||||
|
||||
QOI - The "Quite OK Image" format for fast, lossless image compression
|
||||
|
||||
-- About
|
||||
|
||||
QOI encodes and decodes images in a lossless format. Compared to stb_image and
|
||||
stb_image_write QOI offers 20x-50x faster encoding, 3x-4x faster decoding and
|
||||
20% better compression.
|
||||
|
||||
|
||||
-- Synopsis
|
||||
|
||||
// Define `QOI_IMPLEMENTATION` in *one* C/C++ file before including this
|
||||
// library to create the implementation.
|
||||
|
||||
#define QOI_IMPLEMENTATION
|
||||
#include "qoi.h"
|
||||
|
||||
// Encode and store an RGBA buffer to the file system. The qoi_desc describes
|
||||
// the input pixel data.
|
||||
qoi_write("image_new.qoi", rgba_pixels, &(qoi_desc){
|
||||
.width = 1920,
|
||||
.height = 1080,
|
||||
.channels = 4,
|
||||
.colorspace = QOI_SRGB
|
||||
});
|
||||
|
||||
// Load and decode a QOI image from the file system into a 32bbp RGBA buffer.
|
||||
// The qoi_desc struct will be filled with the width, height, number of channels
|
||||
// and colorspace read from the file header.
|
||||
qoi_desc desc;
|
||||
void *rgba_pixels = qoi_read("image.qoi", &desc, 4);
|
||||
|
||||
|
||||
|
||||
-- Documentation
|
||||
|
||||
This library provides the following functions;
|
||||
- qoi_read -- read and decode a QOI file
|
||||
- qoi_decode -- decode the raw bytes of a QOI image from memory
|
||||
- qoi_write -- encode and write a QOI file
|
||||
- qoi_encode -- encode an rgba buffer into a QOI image in memory
|
||||
|
||||
See the function declaration below for the signature and more information.
|
||||
|
||||
If you don't want/need the qoi_read and qoi_write functions, you can define
|
||||
QOI_NO_STDIO before including this library.
|
||||
|
||||
This library uses malloc() and free(). To supply your own malloc implementation
|
||||
you can define QOI_MALLOC and QOI_FREE before including this library.
|
||||
|
||||
This library uses memset() to zero-initialize the index. To supply your own
|
||||
implementation you can define QOI_ZEROARR before including this library.
|
||||
|
||||
|
||||
-- Data Format
|
||||
|
||||
A QOI file has a 14 byte header, followed by any number of data "chunks" and an
|
||||
8-byte end marker.
|
||||
|
||||
struct qoi_header_t {
|
||||
char magic[4]; // magic bytes "qoif"
|
||||
uint32_t width; // image width in pixels (BE)
|
||||
uint32_t height; // image height in pixels (BE)
|
||||
uint8_t channels; // 3 = RGB, 4 = RGBA
|
||||
uint8_t colorspace; // 0 = sRGB with linear alpha, 1 = all channels linear
|
||||
};
|
||||
|
||||
Images are encoded row by row, left to right, top to bottom. The decoder and
|
||||
encoder start with {r: 0, g: 0, b: 0, a: 255} as the previous pixel value. An
|
||||
image is complete when all pixels specified by width * height have been covered.
|
||||
|
||||
Pixels are encoded as
|
||||
- a run of the previous pixel
|
||||
- an index into an array of previously seen pixels
|
||||
- a difference to the previous pixel value in r,g,b
|
||||
- full r,g,b or r,g,b,a values
|
||||
|
||||
The color channels are assumed to not be premultiplied with the alpha channel
|
||||
("un-premultiplied alpha").
|
||||
|
||||
A running array[64] (zero-initialized) of previously seen pixel values is
|
||||
maintained by the encoder and decoder. Each pixel that is seen by the encoder
|
||||
and decoder is put into this array at the position formed by a hash function of
|
||||
the color value. In the encoder, if the pixel value at the index matches the
|
||||
current pixel, this index position is written to the stream as QOI_OP_INDEX.
|
||||
The hash function for the index is:
|
||||
|
||||
index_position = (r * 3 + g * 5 + b * 7 + a * 11) % 64
|
||||
|
||||
Each chunk starts with a 2- or 8-bit tag, followed by a number of data bits. The
|
||||
bit length of chunks is divisible by 8 - i.e. all chunks are byte aligned. All
|
||||
values encoded in these data bits have the most significant bit on the left.
|
||||
|
||||
The 8-bit tags have precedence over the 2-bit tags. A decoder must check for the
|
||||
presence of an 8-bit tag first.
|
||||
|
||||
The byte stream's end is marked with 7 0x00 bytes followed a single 0x01 byte.
|
||||
|
||||
|
||||
The possible chunks are:
|
||||
|
||||
|
||||
.- QOI_OP_INDEX ----------.
|
||||
| Byte[0] |
|
||||
| 7 6 5 4 3 2 1 0 |
|
||||
|-------+-----------------|
|
||||
| 0 0 | index |
|
||||
`-------------------------`
|
||||
2-bit tag b00
|
||||
6-bit index into the color index array: 0..63
|
||||
|
||||
A valid encoder must not issue 2 or more consecutive QOI_OP_INDEX chunks to the
|
||||
same index. QOI_OP_RUN should be used instead.
|
||||
|
||||
|
||||
.- QOI_OP_DIFF -----------.
|
||||
| Byte[0] |
|
||||
| 7 6 5 4 3 2 1 0 |
|
||||
|-------+-----+-----+-----|
|
||||
| 0 1 | dr | dg | db |
|
||||
`-------------------------`
|
||||
2-bit tag b01
|
||||
2-bit red channel difference from the previous pixel between -2..1
|
||||
2-bit green channel difference from the previous pixel between -2..1
|
||||
2-bit blue channel difference from the previous pixel between -2..1
|
||||
|
||||
The difference to the current channel values are using a wraparound operation,
|
||||
so "1 - 2" will result in 255, while "255 + 1" will result in 0.
|
||||
|
||||
Values are stored as unsigned integers with a bias of 2. E.g. -2 is stored as
|
||||
0 (b00). 1 is stored as 3 (b11).
|
||||
|
||||
The alpha value remains unchanged from the previous pixel.
|
||||
|
||||
|
||||
.- QOI_OP_LUMA -------------------------------------.
|
||||
| Byte[0] | Byte[1] |
|
||||
| 7 6 5 4 3 2 1 0 | 7 6 5 4 3 2 1 0 |
|
||||
|-------+-----------------+-------------+-----------|
|
||||
| 1 0 | green diff | dr - dg | db - dg |
|
||||
`---------------------------------------------------`
|
||||
2-bit tag b10
|
||||
6-bit green channel difference from the previous pixel -32..31
|
||||
4-bit red channel difference minus green channel difference -8..7
|
||||
4-bit blue channel difference minus green channel difference -8..7
|
||||
|
||||
The green channel is used to indicate the general direction of change and is
|
||||
encoded in 6 bits. The red and blue channels (dr and db) base their diffs off
|
||||
of the green channel difference and are encoded in 4 bits. I.e.:
|
||||
dr_dg = (cur_px.r - prev_px.r) - (cur_px.g - prev_px.g)
|
||||
db_dg = (cur_px.b - prev_px.b) - (cur_px.g - prev_px.g)
|
||||
|
||||
The difference to the current channel values are using a wraparound operation,
|
||||
so "10 - 13" will result in 253, while "250 + 7" will result in 1.
|
||||
|
||||
Values are stored as unsigned integers with a bias of 32 for the green channel
|
||||
and a bias of 8 for the red and blue channel.
|
||||
|
||||
The alpha value remains unchanged from the previous pixel.
|
||||
|
||||
|
||||
.- QOI_OP_RUN ------------.
|
||||
| Byte[0] |
|
||||
| 7 6 5 4 3 2 1 0 |
|
||||
|-------+-----------------|
|
||||
| 1 1 | run |
|
||||
`-------------------------`
|
||||
2-bit tag b11
|
||||
6-bit run-length repeating the previous pixel: 1..62
|
||||
|
||||
The run-length is stored with a bias of -1. Note that the run-lengths 63 and 64
|
||||
(b111110 and b111111) are illegal as they are occupied by the QOI_OP_RGB and
|
||||
QOI_OP_RGBA tags.
|
||||
|
||||
|
||||
.- QOI_OP_RGB ------------------------------------------.
|
||||
| Byte[0] | Byte[1] | Byte[2] | Byte[3] |
|
||||
| 7 6 5 4 3 2 1 0 | 7 .. 0 | 7 .. 0 | 7 .. 0 |
|
||||
|-------------------------+---------+---------+---------|
|
||||
| 1 1 1 1 1 1 1 0 | red | green | blue |
|
||||
`-------------------------------------------------------`
|
||||
8-bit tag b11111110
|
||||
8-bit red channel value
|
||||
8-bit green channel value
|
||||
8-bit blue channel value
|
||||
|
||||
The alpha value remains unchanged from the previous pixel.
|
||||
|
||||
|
||||
.- QOI_OP_RGBA ---------------------------------------------------.
|
||||
| Byte[0] | Byte[1] | Byte[2] | Byte[3] | Byte[4] |
|
||||
| 7 6 5 4 3 2 1 0 | 7 .. 0 | 7 .. 0 | 7 .. 0 | 7 .. 0 |
|
||||
|-------------------------+---------+---------+---------+---------|
|
||||
| 1 1 1 1 1 1 1 1 | red | green | blue | alpha |
|
||||
`-----------------------------------------------------------------`
|
||||
8-bit tag b11111111
|
||||
8-bit red channel value
|
||||
8-bit green channel value
|
||||
8-bit blue channel value
|
||||
8-bit alpha channel value
|
||||
|
||||
*/
|
||||
|
||||
|
||||
/* -----------------------------------------------------------------------------
|
||||
Header - Public functions */
|
||||
|
||||
#ifndef QOI_H
|
||||
#define QOI_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* A pointer to a qoi_desc struct has to be supplied to all of qoi's functions.
|
||||
It describes either the input format (for qoi_write and qoi_encode), or is
|
||||
filled with the description read from the file header (for qoi_read and
|
||||
qoi_decode).
|
||||
|
||||
The colorspace in this qoi_desc is an enum where
|
||||
0 = sRGB, i.e. gamma scaled RGB channels and a linear alpha channel
|
||||
1 = all channels are linear
|
||||
You may use the constants QOI_SRGB or QOI_LINEAR. The colorspace is purely
|
||||
informative. It will be saved to the file header, but does not affect
|
||||
how chunks are en-/decoded. */
|
||||
|
||||
#define QOI_SRGB 0
|
||||
#define QOI_LINEAR 1
|
||||
|
||||
typedef struct {
|
||||
unsigned int width;
|
||||
unsigned int height;
|
||||
unsigned char channels;
|
||||
unsigned char colorspace;
|
||||
} qoi_desc;
|
||||
|
||||
#ifndef QOI_NO_STDIO
|
||||
|
||||
/* Encode raw RGB or RGBA pixels into a QOI image and write it to the file
|
||||
system. The qoi_desc struct must be filled with the image width, height,
|
||||
number of channels (3 = RGB, 4 = RGBA) and the colorspace.
|
||||
|
||||
The function returns 0 on failure (invalid parameters, or fopen or malloc
|
||||
failed) or the number of bytes written on success. */
|
||||
|
||||
int qoi_write(const char *filename, const void *data, const qoi_desc *desc);
|
||||
|
||||
|
||||
/* Read and decode a QOI image from the file system. If channels is 0, the
|
||||
number of channels from the file header is used. If channels is 3 or 4 the
|
||||
output format will be forced into this number of channels.
|
||||
|
||||
The function either returns NULL on failure (invalid data, or malloc or fopen
|
||||
failed) or a pointer to the decoded pixels. On success, the qoi_desc struct
|
||||
will be filled with the description from the file header.
|
||||
|
||||
The returned pixel data should be free()d after use. */
|
||||
|
||||
void *qoi_read(const char *filename, qoi_desc *desc, int channels);
|
||||
|
||||
#endif /* QOI_NO_STDIO */
|
||||
|
||||
|
||||
/* Encode raw RGB or RGBA pixels into a QOI image in memory.
|
||||
|
||||
The function either returns NULL on failure (invalid parameters or malloc
|
||||
failed) or a pointer to the encoded data on success. On success the out_len
|
||||
is set to the size in bytes of the encoded data.
|
||||
|
||||
The returned qoi data should be free()d after use. */
|
||||
|
||||
void *qoi_encode(const void *data, const qoi_desc *desc, int *out_len);
|
||||
|
||||
|
||||
/* Decode a QOI image from memory.
|
||||
|
||||
The function either returns NULL on failure (invalid parameters or malloc
|
||||
failed) or a pointer to the decoded pixels. On success, the qoi_desc struct
|
||||
is filled with the description from the file header.
|
||||
|
||||
The returned pixel data should be free()d after use. */
|
||||
|
||||
void *qoi_decode(const void *data, int size, qoi_desc *desc, int channels);
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
#endif /* QOI_H */
|
||||
|
||||
|
||||
/* -----------------------------------------------------------------------------
|
||||
Implementation */
|
||||
|
||||
#ifdef QOI_IMPLEMENTATION
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#ifndef QOI_MALLOC
|
||||
#define QOI_MALLOC(sz) malloc(sz)
|
||||
#define QOI_FREE(p) free(p)
|
||||
#endif
|
||||
#ifndef QOI_ZEROARR
|
||||
#define QOI_ZEROARR(a) memset((a),0,sizeof(a))
|
||||
#endif
|
||||
|
||||
#define QOI_OP_INDEX 0x00 /* 00xxxxxx */
|
||||
#define QOI_OP_DIFF 0x40 /* 01xxxxxx */
|
||||
#define QOI_OP_LUMA 0x80 /* 10xxxxxx */
|
||||
#define QOI_OP_RUN 0xc0 /* 11xxxxxx */
|
||||
#define QOI_OP_RGB 0xfe /* 11111110 */
|
||||
#define QOI_OP_RGBA 0xff /* 11111111 */
|
||||
|
||||
#define QOI_MASK_2 0xc0 /* 11000000 */
|
||||
|
||||
#define QOI_COLOR_HASH(C) (C.rgba.r*3 + C.rgba.g*5 + C.rgba.b*7 + C.rgba.a*11)
|
||||
#define QOI_MAGIC \
|
||||
(((unsigned int)'q') << 24 | ((unsigned int)'o') << 16 | \
|
||||
((unsigned int)'i') << 8 | ((unsigned int)'f'))
|
||||
#define QOI_HEADER_SIZE 14
|
||||
|
||||
/* 2GB is the max file size that this implementation can safely handle. We guard
|
||||
against anything larger than that, assuming the worst case with 5 bytes per
|
||||
pixel, rounded down to a nice clean value. 400 million pixels ought to be
|
||||
enough for anybody. */
|
||||
#define QOI_PIXELS_MAX ((unsigned int)400000000)
|
||||
|
||||
typedef union {
|
||||
struct { unsigned char r, g, b, a; } rgba;
|
||||
unsigned int v;
|
||||
} qoi_rgba_t;
|
||||
|
||||
static const unsigned char qoi_padding[8] = {0,0,0,0,0,0,0,1};
|
||||
|
||||
static void qoi_write_32(unsigned char *bytes, int *p, unsigned int v) {
|
||||
bytes[(*p)++] = (0xff000000 & v) >> 24;
|
||||
bytes[(*p)++] = (0x00ff0000 & v) >> 16;
|
||||
bytes[(*p)++] = (0x0000ff00 & v) >> 8;
|
||||
bytes[(*p)++] = (0x000000ff & v);
|
||||
}
|
||||
|
||||
static unsigned int qoi_read_32(const unsigned char *bytes, int *p) {
|
||||
unsigned int a = bytes[(*p)++];
|
||||
unsigned int b = bytes[(*p)++];
|
||||
unsigned int c = bytes[(*p)++];
|
||||
unsigned int d = bytes[(*p)++];
|
||||
return a << 24 | b << 16 | c << 8 | d;
|
||||
}
|
||||
|
||||
void *qoi_encode(const void *data, const qoi_desc *desc, int *out_len) {
|
||||
int i, max_size, p, run;
|
||||
int px_len, px_end, px_pos, channels;
|
||||
unsigned char *bytes;
|
||||
const unsigned char *pixels;
|
||||
qoi_rgba_t index[64];
|
||||
qoi_rgba_t px, px_prev;
|
||||
|
||||
if (
|
||||
data == NULL || out_len == NULL || desc == NULL ||
|
||||
desc->width == 0 || desc->height == 0 ||
|
||||
desc->channels < 3 || desc->channels > 4 ||
|
||||
desc->colorspace > 1 ||
|
||||
desc->height >= QOI_PIXELS_MAX / desc->width
|
||||
) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
max_size =
|
||||
desc->width * desc->height * (desc->channels + 1) +
|
||||
QOI_HEADER_SIZE + sizeof(qoi_padding);
|
||||
|
||||
p = 0;
|
||||
bytes = (unsigned char *) QOI_MALLOC(max_size);
|
||||
if (!bytes) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
qoi_write_32(bytes, &p, QOI_MAGIC);
|
||||
qoi_write_32(bytes, &p, desc->width);
|
||||
qoi_write_32(bytes, &p, desc->height);
|
||||
bytes[p++] = desc->channels;
|
||||
bytes[p++] = desc->colorspace;
|
||||
|
||||
|
||||
pixels = (const unsigned char *)data;
|
||||
|
||||
QOI_ZEROARR(index);
|
||||
|
||||
run = 0;
|
||||
px_prev.rgba.r = 0;
|
||||
px_prev.rgba.g = 0;
|
||||
px_prev.rgba.b = 0;
|
||||
px_prev.rgba.a = 255;
|
||||
px = px_prev;
|
||||
|
||||
px_len = desc->width * desc->height * desc->channels;
|
||||
px_end = px_len - desc->channels;
|
||||
channels = desc->channels;
|
||||
|
||||
for (px_pos = 0; px_pos < px_len; px_pos += channels) {
|
||||
px.rgba.r = pixels[px_pos + 0];
|
||||
px.rgba.g = pixels[px_pos + 1];
|
||||
px.rgba.b = pixels[px_pos + 2];
|
||||
|
||||
if (channels == 4) {
|
||||
px.rgba.a = pixels[px_pos + 3];
|
||||
}
|
||||
|
||||
if (px.v == px_prev.v) {
|
||||
run++;
|
||||
if (run == 62 || px_pos == px_end) {
|
||||
bytes[p++] = QOI_OP_RUN | (run - 1);
|
||||
run = 0;
|
||||
}
|
||||
}
|
||||
else {
|
||||
int index_pos;
|
||||
|
||||
if (run > 0) {
|
||||
bytes[p++] = QOI_OP_RUN | (run - 1);
|
||||
run = 0;
|
||||
}
|
||||
|
||||
index_pos = QOI_COLOR_HASH(px) % 64;
|
||||
|
||||
if (index[index_pos].v == px.v) {
|
||||
bytes[p++] = QOI_OP_INDEX | index_pos;
|
||||
}
|
||||
else {
|
||||
index[index_pos] = px;
|
||||
|
||||
if (px.rgba.a == px_prev.rgba.a) {
|
||||
signed char vr = px.rgba.r - px_prev.rgba.r;
|
||||
signed char vg = px.rgba.g - px_prev.rgba.g;
|
||||
signed char vb = px.rgba.b - px_prev.rgba.b;
|
||||
|
||||
signed char vg_r = vr - vg;
|
||||
signed char vg_b = vb - vg;
|
||||
|
||||
if (
|
||||
vr > -3 && vr < 2 &&
|
||||
vg > -3 && vg < 2 &&
|
||||
vb > -3 && vb < 2
|
||||
) {
|
||||
bytes[p++] = QOI_OP_DIFF | (vr + 2) << 4 | (vg + 2) << 2 | (vb + 2);
|
||||
}
|
||||
else if (
|
||||
vg_r > -9 && vg_r < 8 &&
|
||||
vg > -33 && vg < 32 &&
|
||||
vg_b > -9 && vg_b < 8
|
||||
) {
|
||||
bytes[p++] = QOI_OP_LUMA | (vg + 32);
|
||||
bytes[p++] = (vg_r + 8) << 4 | (vg_b + 8);
|
||||
}
|
||||
else {
|
||||
bytes[p++] = QOI_OP_RGB;
|
||||
bytes[p++] = px.rgba.r;
|
||||
bytes[p++] = px.rgba.g;
|
||||
bytes[p++] = px.rgba.b;
|
||||
}
|
||||
}
|
||||
else {
|
||||
bytes[p++] = QOI_OP_RGBA;
|
||||
bytes[p++] = px.rgba.r;
|
||||
bytes[p++] = px.rgba.g;
|
||||
bytes[p++] = px.rgba.b;
|
||||
bytes[p++] = px.rgba.a;
|
||||
}
|
||||
}
|
||||
}
|
||||
px_prev = px;
|
||||
}
|
||||
|
||||
for (i = 0; i < (int)sizeof(qoi_padding); i++) {
|
||||
bytes[p++] = qoi_padding[i];
|
||||
}
|
||||
|
||||
*out_len = p;
|
||||
return bytes;
|
||||
}
|
||||
|
||||
void *qoi_decode(const void *data, int size, qoi_desc *desc, int channels) {
|
||||
const unsigned char *bytes;
|
||||
unsigned int header_magic;
|
||||
unsigned char *pixels;
|
||||
qoi_rgba_t index[64];
|
||||
qoi_rgba_t px;
|
||||
int px_len, chunks_len, px_pos;
|
||||
int p = 0, run = 0;
|
||||
|
||||
if (
|
||||
data == NULL || desc == NULL ||
|
||||
(channels != 0 && channels != 3 && channels != 4) ||
|
||||
size < QOI_HEADER_SIZE + (int)sizeof(qoi_padding)
|
||||
) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
bytes = (const unsigned char *)data;
|
||||
|
||||
header_magic = qoi_read_32(bytes, &p);
|
||||
desc->width = qoi_read_32(bytes, &p);
|
||||
desc->height = qoi_read_32(bytes, &p);
|
||||
desc->channels = bytes[p++];
|
||||
desc->colorspace = bytes[p++];
|
||||
|
||||
if (
|
||||
desc->width == 0 || desc->height == 0 ||
|
||||
desc->channels < 3 || desc->channels > 4 ||
|
||||
desc->colorspace > 1 ||
|
||||
header_magic != QOI_MAGIC ||
|
||||
desc->height >= QOI_PIXELS_MAX / desc->width
|
||||
) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (channels == 0) {
|
||||
channels = desc->channels;
|
||||
}
|
||||
|
||||
px_len = desc->width * desc->height * channels;
|
||||
pixels = (unsigned char *) QOI_MALLOC(px_len);
|
||||
if (!pixels) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
QOI_ZEROARR(index);
|
||||
px.rgba.r = 0;
|
||||
px.rgba.g = 0;
|
||||
px.rgba.b = 0;
|
||||
px.rgba.a = 255;
|
||||
|
||||
chunks_len = size - (int)sizeof(qoi_padding);
|
||||
for (px_pos = 0; px_pos < px_len; px_pos += channels) {
|
||||
if (run > 0) {
|
||||
run--;
|
||||
}
|
||||
else if (p < chunks_len) {
|
||||
int b1 = bytes[p++];
|
||||
|
||||
if (b1 == QOI_OP_RGB) {
|
||||
px.rgba.r = bytes[p++];
|
||||
px.rgba.g = bytes[p++];
|
||||
px.rgba.b = bytes[p++];
|
||||
}
|
||||
else if (b1 == QOI_OP_RGBA) {
|
||||
px.rgba.r = bytes[p++];
|
||||
px.rgba.g = bytes[p++];
|
||||
px.rgba.b = bytes[p++];
|
||||
px.rgba.a = bytes[p++];
|
||||
}
|
||||
else if ((b1 & QOI_MASK_2) == QOI_OP_INDEX) {
|
||||
px = index[b1];
|
||||
}
|
||||
else if ((b1 & QOI_MASK_2) == QOI_OP_DIFF) {
|
||||
px.rgba.r += ((b1 >> 4) & 0x03) - 2;
|
||||
px.rgba.g += ((b1 >> 2) & 0x03) - 2;
|
||||
px.rgba.b += ( b1 & 0x03) - 2;
|
||||
}
|
||||
else if ((b1 & QOI_MASK_2) == QOI_OP_LUMA) {
|
||||
int b2 = bytes[p++];
|
||||
int vg = (b1 & 0x3f) - 32;
|
||||
px.rgba.r += vg - 8 + ((b2 >> 4) & 0x0f);
|
||||
px.rgba.g += vg;
|
||||
px.rgba.b += vg - 8 + (b2 & 0x0f);
|
||||
}
|
||||
else if ((b1 & QOI_MASK_2) == QOI_OP_RUN) {
|
||||
run = (b1 & 0x3f);
|
||||
}
|
||||
|
||||
index[QOI_COLOR_HASH(px) % 64] = px;
|
||||
}
|
||||
|
||||
pixels[px_pos + 0] = px.rgba.r;
|
||||
pixels[px_pos + 1] = px.rgba.g;
|
||||
pixels[px_pos + 2] = px.rgba.b;
|
||||
|
||||
if (channels == 4) {
|
||||
pixels[px_pos + 3] = px.rgba.a;
|
||||
}
|
||||
}
|
||||
|
||||
return pixels;
|
||||
}
|
||||
|
||||
#ifndef QOI_NO_STDIO
|
||||
#include <stdio.h>
|
||||
|
||||
int qoi_write(const char *filename, const void *data, const qoi_desc *desc) {
|
||||
FILE *f = fopen(filename, "wb");
|
||||
int size, err;
|
||||
void *encoded;
|
||||
|
||||
if (!f) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
encoded = qoi_encode(data, desc, &size);
|
||||
if (!encoded) {
|
||||
fclose(f);
|
||||
return 0;
|
||||
}
|
||||
|
||||
fwrite(encoded, 1, size, f);
|
||||
fflush(f);
|
||||
err = ferror(f);
|
||||
fclose(f);
|
||||
|
||||
QOI_FREE(encoded);
|
||||
return err ? 0 : size;
|
||||
}
|
||||
|
||||
void *qoi_read(const char *filename, qoi_desc *desc, int channels) {
|
||||
FILE *f = fopen(filename, "rb");
|
||||
int size, bytes_read;
|
||||
void *pixels, *data;
|
||||
|
||||
if (!f) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
fseek(f, 0, SEEK_END);
|
||||
size = ftell(f);
|
||||
if (size <= 0 || fseek(f, 0, SEEK_SET) != 0) {
|
||||
fclose(f);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
data = QOI_MALLOC(size);
|
||||
if (!data) {
|
||||
fclose(f);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
bytes_read = fread(data, 1, size, f);
|
||||
fclose(f);
|
||||
pixels = (bytes_read != size) ? NULL : qoi_decode(data, bytes_read, desc, channels);
|
||||
QOI_FREE(data);
|
||||
return pixels;
|
||||
}
|
||||
|
||||
#endif /* QOI_NO_STDIO */
|
||||
#endif /* QOI_IMPLEMENTATION */
|
||||
|
|
@ -33,6 +33,9 @@
|
|||
#define DR_MP3_IMPLEMENTATION
|
||||
#include "dr_mp3.h"
|
||||
|
||||
#define QOA_IMPLEMENTATION
|
||||
#include "qoa.h"
|
||||
|
||||
static struct {
|
||||
char *key;
|
||||
struct wav *value;
|
||||
|
|
@ -141,17 +144,34 @@ struct wav *make_sound(const char *wav) {
|
|||
mwav.data = drwav_open_file_and_read_pcm_frames_f32(wav, &mwav.ch, &mwav.samplerate, &mwav.frames, NULL);
|
||||
} else if (!strcmp(ext, "flac")) {
|
||||
mwav.data = drflac_open_file_and_read_pcm_frames_f32(wav, &mwav.ch, &mwav.samplerate, &mwav.frames, NULL);
|
||||
YughWarn("Flac opened with %d ch, %d samplerate", mwav.ch, mwav.samplerate);
|
||||
} else if (!strcmp(ext, "mp3")) {
|
||||
drmp3_config cnf;
|
||||
mwav.data = drmp3_open_file_and_read_pcm_frames_f32(wav, &cnf, &mwav.frames, NULL);
|
||||
mwav.ch = cnf.channels;
|
||||
mwav.samplerate = cnf.sampleRate;
|
||||
} else if (!strcmp(ext, "qoa")) {
|
||||
unsigned char header[QOA_MIN_FILESIZE];
|
||||
FILE *f = fopen(wav, "rb");
|
||||
fread(header, QOA_MIN_FILESIZE, 1, f);
|
||||
qoa_desc qoa;
|
||||
unsigned int ff_pos = qoa_decode_header(header, QOA_MIN_FILESIZE, &qoa);
|
||||
mwav.ch = qoa.channels;
|
||||
mwav.samplerate = qoa.samplerate;
|
||||
mwav.frames = qoa.samples;
|
||||
|
||||
short *qoa_data = qoa_read(wav, &qoa);
|
||||
mwav.data = malloc(sizeof(soundbyte) * mwav.frames * mwav.ch);
|
||||
src_short_to_float_array(qoa_data, mwav.data, mwav.frames*mwav.ch);
|
||||
|
||||
fclose(f);
|
||||
free(qoa_data);
|
||||
} else {
|
||||
YughWarn("Cannot process file type '%s'.", ext);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
YughWarn("%s opened with %d ch, %d samplerate, %d frames", ext, mwav.ch, mwav.samplerate, mwav.frames);
|
||||
|
||||
if (mwav.samplerate != SAMPLERATE) {
|
||||
YughWarn("Changing samplerate of %s from %d to %d.", wav, mwav.samplerate, SAMPLERATE);
|
||||
mwav = change_samplerate(mwav, SAMPLERATE);
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
#ifndef DSP_H
|
||||
#define DSP_H
|
||||
|
||||
#define SAMPLERATE 48000
|
||||
#define SAMPLERATE 44100
|
||||
#define BUF_FRAMES 128 /* At 48k, 128 needed for 240fps consistency */
|
||||
#define CHANNELS 2
|
||||
|
||||
|
|
|
|||
|
|
@ -11,6 +11,9 @@
|
|||
#include "stb_image_resize.h"
|
||||
#include <stdio.h>
|
||||
|
||||
#define QOI_IMPLEMENTATION
|
||||
#include "qoi.h"
|
||||
|
||||
struct glrect ST_UNIT = {0.f, 1.f, 0.f, 1.f};
|
||||
|
||||
static struct {
|
||||
|
|
@ -72,6 +75,8 @@ struct Texture *texture_pullfromfile(const char *path) {
|
|||
return texhash[index].value;
|
||||
|
||||
YughInfo("Loading texture %s.", path);
|
||||
|
||||
|
||||
struct Texture *tex = calloc(1, sizeof(*tex));
|
||||
tex->opts.sprite = 1;
|
||||
tex->opts.mips = 0;
|
||||
|
|
@ -80,7 +85,20 @@ struct Texture *texture_pullfromfile(const char *path) {
|
|||
tex->opts.wrapy = 1;
|
||||
|
||||
int n;
|
||||
unsigned char *data = stbi_load(path, &tex->width, &tex->height, &n, 4);
|
||||
|
||||
unsigned char *data;
|
||||
|
||||
char *ext = strrchr(path, '.')+1;
|
||||
|
||||
if (!strcmp(ext, "qoi")) {
|
||||
qoi_desc qoi;
|
||||
data = qoi_read(path, &qoi, 4);
|
||||
tex->width = qoi.width;
|
||||
tex->height = qoi.height;
|
||||
n = qoi.channels;
|
||||
} else {
|
||||
data = stbi_load(path, &tex->width, &tex->height, &n, 4);
|
||||
}
|
||||
|
||||
if (data == NULL) {
|
||||
YughError("STBI failed to load file %s with message: %s\nOpening default instead.", path, stbi_failure_reason());
|
||||
|
|
|
|||
|
|
@ -426,7 +426,7 @@ void
|
|||
src_short_to_float_array (const short *in, float *out, int len)
|
||||
{
|
||||
for (int i = 0 ; i < len ; i++)
|
||||
{ out [i] = (float) (in [i] / (1.0 * 0x8000)) ;
|
||||
{ out [i] = (float) (in [i] / ((float)0x8000)) ;
|
||||
} ;
|
||||
|
||||
return ;
|
||||
|
|
|
|||
|
|
@ -13,6 +13,9 @@
|
|||
|
||||
#include "stb_ds.h"
|
||||
|
||||
#include "sokol/sokol_app.h"
|
||||
#include "stb_image_resize.h"
|
||||
|
||||
struct window mainwin;
|
||||
|
||||
static struct window *windows = NULL;
|
||||
|
|
@ -70,8 +73,33 @@ void window_togglefullscreen(struct window *w) {
|
|||
mainwin.fullscreen = sapp_is_fullscreen();
|
||||
}
|
||||
|
||||
void window_seticon(struct window *w, struct Texture *icon) {
|
||||
void window_seticon(struct window *w, struct Texture *tex)
|
||||
{
|
||||
struct isize {
|
||||
int size;
|
||||
unsigned char *data;
|
||||
};
|
||||
struct isize sizes[3];
|
||||
sizes[0].size = 16;
|
||||
sizes[1].size = 32;
|
||||
sizes[2].size = 64;
|
||||
|
||||
for (int i = 0; i < 3; i++) {
|
||||
sizes[i].data = malloc(4*sizes[i].size*sizes[i].size);
|
||||
stbir_resize_uint8(tex->data, tex->width, tex->height, 0, sizes[i].data, sizes[i].size, sizes[i].size, 0, 4);
|
||||
}
|
||||
|
||||
sapp_icon_desc idsc = {
|
||||
.images = {
|
||||
{ .width = sizes[0].size, .height = sizes[0].size, .pixels = { .ptr=sizes[0].data, .size=4*sizes[0].size*sizes[0].size } },
|
||||
{ .width = sizes[1].size, .height = sizes[1].size, .pixels = { .ptr=sizes[1].data, .size=4*sizes[1].size*sizes[1].size } },
|
||||
{ .width = sizes[2].size, .height = sizes[2].size, .pixels = { .ptr=sizes[2].data, .size=4*sizes[2].size*sizes[2].size } },
|
||||
}
|
||||
};
|
||||
|
||||
sapp_set_icon(&idsc);
|
||||
for (int i = 0; i < 3; i++)
|
||||
free(sizes[i].data);
|
||||
}
|
||||
|
||||
void window_render(struct window *w) {
|
||||
|
|
|
|||
|
|
@ -1,7 +1,6 @@
|
|||
#include "yugine.h"
|
||||
|
||||
#include "camera.h"
|
||||
#include "engine.h"
|
||||
#include "font.h"
|
||||
#include "gameobject.h"
|
||||
#include "input.h"
|
||||
|
|
@ -39,6 +38,23 @@
|
|||
#include "sokol/sokol_app.h"
|
||||
#include "sokol/sokol_audio.h"
|
||||
|
||||
#define STB_DS_IMPLEMENTATION
|
||||
#include <stb_ds.h>
|
||||
|
||||
#define STB_TRUETYPE_IMPLEMENTATION
|
||||
#include <stb_truetype.h>
|
||||
|
||||
#define STB_IMAGE_IMPLEMENTATION
|
||||
#define STBI_FAILURE_USERMSG
|
||||
#include "stb_image.h"
|
||||
|
||||
#define STB_IMAGE_WRITE_IMPLEMENTATION
|
||||
#include "stb_image_write.h"
|
||||
|
||||
#define PL_MPEG_IMPLEMENTATION
|
||||
#include <pl_mpeg.h>
|
||||
|
||||
|
||||
int physOn = 0;
|
||||
|
||||
double renderlag = 0;
|
||||
|
|
@ -117,15 +133,12 @@ const char *engine_info()
|
|||
return str;
|
||||
}
|
||||
|
||||
void sg_logging(const char *tag, uint32_t lvl, uint32_t id, const char *msg, uint32_t line, const char *file, void *data) {
|
||||
mYughLog(0, 1, line, file, "tag: %s, msg: %s", tag, msg);
|
||||
}
|
||||
|
||||
static int argc;
|
||||
static char **args;
|
||||
|
||||
void c_init() {
|
||||
int logout = 0;
|
||||
int logout = 0;
|
||||
#if DBG
|
||||
if (logout) {
|
||||
time_t now = time(NULL);
|
||||
|
|
@ -150,8 +163,12 @@ int logout = 0;
|
|||
signal(SIGBUS, seghandle);
|
||||
|
||||
#endif
|
||||
|
||||
engine_init();
|
||||
resources_init();
|
||||
phys2d_init();
|
||||
sound_init();
|
||||
script_init();
|
||||
input_init();
|
||||
openglInit();
|
||||
|
||||
int argsize = 0;
|
||||
for (int i = 1; i < argc; i++) {
|
||||
|
|
@ -168,23 +185,6 @@ int logout = 0;
|
|||
}
|
||||
|
||||
script_evalf("cmd_args('%s');", cmdstr);
|
||||
|
||||
|
||||
mainwin.width = sapp_width();
|
||||
mainwin.height = sapp_height();
|
||||
|
||||
sg_setup(&(sg_desc){
|
||||
.logger = {
|
||||
.func = sg_logging,
|
||||
.user_data = NULL,
|
||||
},
|
||||
|
||||
.buffer_pool_size = 1024,
|
||||
.context.sample_count = 1,
|
||||
});
|
||||
|
||||
input_init();
|
||||
openglInit();
|
||||
}
|
||||
|
||||
int frame_fps() {
|
||||
|
|
|
|||
|
|
@ -16,6 +16,8 @@ const char *engine_info();
|
|||
int frame_fps();
|
||||
|
||||
extern double appTime;
|
||||
|
||||
extern double renderMS;
|
||||
extern double physMS;
|
||||
extern double updateMS;
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue