Add icon loader

Add helper to load icons from image files via FFmpeg.
This commit is contained in:
Romain Vimont 2021-10-22 18:51:20 +02:00
parent 156d958e77
commit 0e4564da03
3 changed files with 264 additions and 0 deletions

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@ -9,6 +9,7 @@ src = [
'src/decoder.c',
'src/device_msg.c',
'src/event_converter.c',
'src/icon.c',
'src/file_handler.c',
'src/fps_counter.c',
'src/frame_buffer.c',

247
app/src/icon.c Normal file
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@ -0,0 +1,247 @@
#include "icon.h"
#include <assert.h>
#include <stdbool.h>
#include <libavformat/avformat.h>
#include <libavutil/pixdesc.h>
#include <libavutil/pixfmt.h>
#include "config.h"
#include "compat.h"
#include "util/log.h"
#include "util/process.h"
#include "util/str_util.h"
#define SCRCPY_PORTABLE_ICON_FILENAME "icon.png"
#define SCRCPY_DEFAULT_ICON_PATH \
PREFIX "/share/icons/hicolor/256x256/apps/scrcpy.png"
static char *
get_icon_path(void) {
#ifdef __WINDOWS__
const wchar_t *icon_path_env = _wgetenv(L"SCRCPY_ICON_PATH");
#else
const char *icon_path_env = getenv("SCRCPY_ICON_PATH");
#endif
if (icon_path_env) {
// if the envvar is set, use it
#ifdef __WINDOWS__
char *icon_path = utf8_from_wide_char(icon_path_env);
#else
char *icon_path = strdup(icon_path_env);
#endif
if (!icon_path) {
LOGE("Could not allocate memory");
return NULL;
}
LOGD("Using SCRCPY_ICON_PATH: %s", icon_path);
return icon_path;
}
#ifndef PORTABLE
LOGD("Using icon: " SCRCPY_DEFAULT_ICON_PATH);
char *icon_path = strdup(SCRCPY_DEFAULT_ICON_PATH);
if (!icon_path) {
LOGE("Could not allocate memory");
return NULL;
}
#else
char *icon_path = get_local_file_path(SCRCPY_PORTABLE_ICON_FILENAME);
if (!icon_path) {
LOGE("Could not get icon path");
return NULL;
}
LOGD("Using icon (portable): %s", icon_path);
#endif
return icon_path;
}
static AVFrame *
decode_image(const char *path) {
AVFrame *result = NULL;
AVFormatContext *ctx = avformat_alloc_context();
if (!ctx) {
LOGE("Could not allocate image decoder context");
return NULL;
}
if (avformat_open_input(&ctx, path, NULL, NULL) < 0) {
LOGE("Could not open image codec: %s", path);
goto free_ctx;
}
if (avformat_find_stream_info(ctx, NULL) < 0) {
LOGE("Could not find image stream info");
goto close_input;
}
int stream = av_find_best_stream(ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
if (stream < 0 ) {
LOGE("Could not find best image stream");
goto close_input;
}
AVCodecParameters *params = ctx->streams[stream]->codecpar;
AVCodec *codec = avcodec_find_decoder(params->codec_id);
if (!codec) {
LOGE("Could not find image decoder");
goto close_input;
}
AVCodecContext *codec_ctx = avcodec_alloc_context3(codec);
if (!codec_ctx) {
LOGE("Could not allocate codec context");
goto close_input;
}
if (avcodec_parameters_to_context(codec_ctx, params) < 0) {
LOGE("Could not fill codec context");
goto free_codec_ctx;
}
if (avcodec_open2(codec_ctx, codec, NULL) < 0) {
LOGE("Could not open image codec");
goto free_codec_ctx;
}
AVFrame *frame = av_frame_alloc();
if (!frame) {
LOGE("Could not allocate frame");
goto close_codec;
}
AVPacket *packet = av_packet_alloc();
if (!packet) {
LOGE("Could not allocate packet");
av_frame_free(&frame);
goto close_codec;
}
if (av_read_frame(ctx, packet) < 0) {
LOGE("Could not read frame");
av_packet_free(&packet);
av_frame_free(&frame);
goto close_codec;
}
int ret;
if ((ret = avcodec_send_packet(codec_ctx, packet)) < 0) {
LOGE("Could not send icon packet: %d", ret);
av_packet_free(&packet);
av_frame_free(&frame);
goto close_codec;
}
if ((ret = avcodec_receive_frame(codec_ctx, frame)) != 0) {
LOGE("Could not receive icon frame: %d", ret);
av_packet_free(&packet);
av_frame_free(&frame);
goto close_codec;
}
av_packet_free(&packet);
result = frame;
close_codec:
avcodec_close(codec_ctx);
free_codec_ctx:
avcodec_free_context(&codec_ctx);
close_input:
avformat_close_input(&ctx);
free_ctx:
avformat_free_context(ctx);
return result;
}
static SDL_PixelFormatEnum
to_sdl_pixel_format(enum AVPixelFormat fmt) {
switch (fmt) {
case AV_PIX_FMT_RGB24: return SDL_PIXELFORMAT_RGB24;
case AV_PIX_FMT_BGR24: return SDL_PIXELFORMAT_BGR24;
case AV_PIX_FMT_ARGB: return SDL_PIXELFORMAT_ARGB32;
case AV_PIX_FMT_RGBA: return SDL_PIXELFORMAT_RGBA32;
case AV_PIX_FMT_ABGR: return SDL_PIXELFORMAT_ABGR32;
case AV_PIX_FMT_BGRA: return SDL_PIXELFORMAT_BGRA32;
case AV_PIX_FMT_RGB565BE: return SDL_PIXELFORMAT_RGB565;
case AV_PIX_FMT_RGB555BE: return SDL_PIXELFORMAT_RGB555;
case AV_PIX_FMT_BGR565BE: return SDL_PIXELFORMAT_BGR565;
case AV_PIX_FMT_BGR555BE: return SDL_PIXELFORMAT_BGR555;
case AV_PIX_FMT_RGB444BE: return SDL_PIXELFORMAT_RGB444;
case AV_PIX_FMT_BGR444BE: return SDL_PIXELFORMAT_BGR444;
default: return SDL_PIXELFORMAT_UNKNOWN;
}
}
static SDL_Surface *
load_from_path(const char *path) {
AVFrame *frame = decode_image(path);
if (!frame) {
return NULL;
}
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
if (!desc) {
LOGE("Could not get icon format descriptor");
goto error;
}
bool is_packed_rgb = desc->flags & AV_PIX_FMT_FLAG_RGB
&& !(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
if (!is_packed_rgb) {
LOGE("Could not load non-RGB icon");
goto error;
}
SDL_PixelFormatEnum format = to_sdl_pixel_format(frame->format);
if (format == SDL_PIXELFORMAT_UNKNOWN) {
LOGE("Unsupported icon pixel format: %s (%d)", desc->name,
frame->format);
goto error;
}
int bits_per_pixel = av_get_bits_per_pixel(desc);
SDL_Surface *surface =
SDL_CreateRGBSurfaceWithFormatFrom(frame->data[0],
frame->width, frame->height,
bits_per_pixel,
frame->linesize[0],
format);
if (!surface) {
LOGE("Could not create icon surface");
goto error;
}
surface->userdata = frame; // frame owns the data
return surface;
error:
av_frame_free(&frame);
return NULL;
}
SDL_Surface *
scrcpy_icon_load() {
char *icon_path = get_icon_path();
if (!icon_path) {
return NULL;
}
SDL_Surface *icon = load_from_path(icon_path);
free(icon_path);
return icon;
}
void
scrcpy_icon_destroy(SDL_Surface *icon) {
AVFrame *frame = icon->userdata;
assert(frame);
av_frame_free(&frame);
SDL_FreeSurface(icon);
}

16
app/src/icon.h Normal file
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@ -0,0 +1,16 @@
#ifndef ICON_H
#define ICON_H
#include "common.h"
#include <stdbool.h>
#include <SDL2/SDL.h>
#include <libavformat/avformat.h>
SDL_Surface *
scrcpy_icon_load(void);
void
scrcpy_icon_destroy(SDL_Surface *icon);
#endif