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scrcpy/app/src/icon.c
Bernhard Rosenkränzer 5e8fa56e7a Fix build with ffmpeg 5.0 
PR #2948 <https://github.com/Genymobile/scrcpy/pull/2948>

Signed-off-by: Bernhard Rosenkränzer <bero@lindev.ch>
Signed-off-by: Romain Vimont <rom@rom1v.com>
2022-01-16 17:37:28 +01:00

291 lines
7.9 KiB
C
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#include "icon.h"
#include <assert.h>
#include <stdbool.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libavutil/pixdesc.h>
#include <libavutil/pixfmt.h>
#include "config.h"
#include "compat.h"
#include "util/file.h"
#include "util/log.h"
#include "util/str.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 = sc_str_from_wchars(icon_path_env);
#else
char *icon_path = strdup(icon_path_env);
#endif
if (!icon_path) {
LOG_OOM();
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) {
LOG_OOM();
return NULL;
}
#else
char *icon_path = sc_file_get_local_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) {
LOG_OOM();
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;
const 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) {
LOG_OOM();
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) {
LOG_OOM();
goto close_codec;
}
AVPacket *packet = av_packet_alloc();
if (!packet) {
LOG_OOM();
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;
}
#if !SDL_VERSION_ATLEAST(2, 0, 10)
// SDL_PixelFormatEnum has been introduced in SDL 2.0.10. Use int for older SDL
// versions.
typedef int SDL_PixelFormatEnum;
#endif
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;
#if SDL_VERSION_ATLEAST(2, 0, 12)
case AV_PIX_FMT_BGR444BE: return SDL_PIXELFORMAT_BGR444;
#endif
case AV_PIX_FMT_PAL8: return SDL_PIXELFORMAT_INDEX8;
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 = !(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
if (!is_packed) {
LOGE("Could not load non-packed 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;
}
if (frame->format == AV_PIX_FMT_PAL8) {
// Initialize the SDL palette
uint8_t *data = frame->data[1];
SDL_Color colors[256];
for (int i = 0; i < 256; ++i) {
SDL_Color *color = &colors[i];
// The palette is transported in AVFrame.data[1], is 1024 bytes
// long (256 4-byte entries) and is formatted the same as in
// AV_PIX_FMT_RGB32 described above (i.e., it is also
// endian-specific).
// <https://ffmpeg.org/doxygen/4.1/pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5>
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
color->a = data[i * 4];
color->r = data[i * 4 + 1];
color->g = data[i * 4 + 2];
color->b = data[i * 4 + 3];
#else
color->a = data[i * 4 + 3];
color->r = data[i * 4 + 2];
color->g = data[i * 4 + 1];
color->b = data[i * 4];
#endif
}
SDL_Palette *palette = surface->format->palette;
assert(palette);
int ret = SDL_SetPaletteColors(palette, colors, 0, 256);
if (ret) {
LOGE("Could not set palette colors");
SDL_FreeSurface(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);
}
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