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/*
* Copyright © 2024 Matthew Wozniak <me@woz.blue>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "api.h"
#include "log.h"
#include "render.h"
#include "os.h"
#include <codecapi.h>
#include <mfapi.h>
#include <mfobjects.h>
#include <mfreadwrite.h>
#include <stdlib.h>
#include <string.h>
#include <strmif.h>
#include <winerror.h>
static struct renderctx ctx = { 0 };
static bool is_rendering = false;
#define HR(expr) { \
HRESULT hr = expr; \
if (!SUCCEEDED(hr)) \
bail(#expr " failed!!! (code %lu)", hr); \
}
bool do_frame(struct videomode *this, struct movieinfo *info) {
is_rendering = true;
IMFSample *sample = NULL;
IMFMediaBuffer *imf_buffer = NULL;
int szpx = 4;
u32 *data = NULL;
HR(MFCreateMemoryBuffer(ctx.width * ctx.height * szpx, &imf_buffer));
HR(imf_buffer->lpVtbl->Lock(imf_buffer, (u8 **)&data, NULL, NULL));
// THIS IS SLOW!!
u32 *raw = malloc(ctx.width * ctx.height * szpx);
this->vt->read_screen_pixels(this, 0, 0, ctx.width, ctx.height, raw, IMAGE_FORMAT_BGRA8888);
for (int y = ctx.height - 1; y > 0; y--) {
memcpy(data + ((ctx.height - y) * ctx.width), raw + y * ctx.width,
szpx * ctx.width);
/* for (int x = 0; x < ctx.width; x++) {
data[(ctx.height - y) * ctx.width + x] = raw[y * ctx.width + x];
} */
}
free(raw);
HR(imf_buffer->lpVtbl->Unlock(imf_buffer));
HR(imf_buffer->lpVtbl->SetCurrentLength(imf_buffer, ctx.width * ctx.height * szpx));
HR(MFCreateSample(&sample));
HR(sample->lpVtbl->AddBuffer(sample, imf_buffer));
u64 sample_duration = (u64)((1.0 / (double)ctx.fps) * 10000000.0);
HR(sample->lpVtbl->SetSampleDuration(sample, sample_duration));
u64 sample_time = sample_duration * info->curframe;
HR(sample->lpVtbl->SetSampleTime(sample, sample_time));
HR(ctx.sink_writer->lpVtbl->WriteSample(ctx.sink_writer, ctx.stream_index, sample));
sample->lpVtbl->Release(sample);
imf_buffer->lpVtbl->Release(imf_buffer);
return true;
}
typeof((*videomode)->vt->write_movie_frame) orig_write_movie_frame;
void VIRTUAL hook_write_movie_frame(struct videomode *this,
struct movieinfo *info) {
if (!do_frame(this, info))
die("oopsie!");
}
bool do_stop() {
HR(ctx.sink_writer->lpVtbl->Flush(ctx.sink_writer, ctx.stream_index));
HR(ctx.sink_writer->lpVtbl->Finalize(ctx.sink_writer));
HR(MFShutdown());
return true;
}
static void (VIRTUAL *orig_stop_playback)(struct demoplayer *);
void VIRTUAL hook_stop_playback(struct demoplayer *this) {
orig_stop_playback(this);
if (!is_rendering) return;
is_rendering = false;
if (!do_stop())
die("oopsie!");
// TODO: IPC mode so we don't have to restart the game for every demo
exit(0);
}
bool render_init(int width, int height, int framerate, bool use_bitrate,
int quality, const char *output_file) {
bool r =
os_mprot((*videomode)->vt, 28 * sizeof(void *), PAGE_EXECUTE_READWRITE);
if (!r) bail("couldn't mprotect videomode vtable");
orig_write_movie_frame = (*videomode)->vt->write_movie_frame;
(*videomode)->vt->write_movie_frame = hook_write_movie_frame;
r = os_mprot(demoplayer->vt, 18 * sizeof(void *), PAGE_EXECUTE_READWRITE);
if (!r) bail("couldn't mprotect demoplayer vtable");
orig_stop_playback = demoplayer->vt->stop_playback;
demoplayer->vt->stop_playback = hook_stop_playback;
// make the game thing we are recording a movie (we are!)
memcpy(movieinfo->name, "a", 2);
movieinfo->type = 0;
char framerate_cmd[32] = { 0 };
sprintf(framerate_cmd, "host_framerate %d;", framerate);
cbuf_addtext(framerate_cmd);
ctx.fps = framerate;
ctx.width = width;
ctx.height = height;
ctx.bit_rate = use_bitrate ? quality : 99999999;
MFStartup(MF_VERSION, 0);
// init sinkwriter
{
IMFMediaType *mt_out = NULL;
IMFMediaType *mt_in = NULL;
u16 path[MAX_PATH] = {0};
info("strlen = %d", strlen(output_file));
mbstowcs(path, output_file, strlen(output_file));
info("rendering to %S", path);
HR(MFCreateSinkWriterFromURL(path, NULL, NULL, &ctx.sink_writer));
HR(MFCreateMediaType(&mt_out));
HR(mt_out->lpVtbl->SetGUID(mt_out, &MF_MT_MAJOR_TYPE, &MFMediaType_Video));
HR(mt_out->lpVtbl->SetGUID(mt_out, &MF_MT_SUBTYPE, &MFVideoFormat_H264));
HR(mt_out->lpVtbl->SetUINT32(mt_out, &MF_MT_AVG_BITRATE, ctx.bit_rate));
HR(mt_out->lpVtbl->SetUINT32(mt_out, &MF_MT_MPEG2_PROFILE , eAVEncH264VProfile_Main));
HR(mt_out->lpVtbl->SetUINT32(mt_out, &MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive));
HR(mt_out->lpVtbl->SetUINT64(mt_out, &MF_MT_FRAME_SIZE, ((u64)ctx.width << 32) | ctx.height));
HR(mt_out->lpVtbl->SetUINT64(mt_out, &MF_MT_FRAME_RATE, ((u64)ctx.fps << 32) | 1));
HR(mt_out->lpVtbl->SetUINT64(mt_out, &MF_MT_PIXEL_ASPECT_RATIO, (((u64)1 << 32) | 1)));
HR(ctx.sink_writer->lpVtbl->AddStream(ctx.sink_writer, mt_out, &ctx.stream_index));
HR(MFCreateMediaType(&mt_in));
HR(mt_in->lpVtbl->SetGUID(mt_in, &MF_MT_MAJOR_TYPE, &MFMediaType_Video));
HR(mt_in->lpVtbl->SetGUID(mt_in, &MF_MT_SUBTYPE, &MFVideoFormat_ARGB32));
HR(mt_in->lpVtbl->SetUINT32(mt_in, &MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive));
HR(mt_in->lpVtbl->SetUINT64(mt_in, &MF_MT_FRAME_SIZE, ((u64)ctx.width << 32) | ctx.height));
HR(mt_in->lpVtbl->SetUINT64(mt_in, &MF_MT_FRAME_RATE, ((u64)ctx.fps << 32) | 1));
HR(mt_in->lpVtbl->SetUINT64(mt_in, &MF_MT_PIXEL_ASPECT_RATIO, (((u64)1 << 32) | 1)));
HR(ctx.sink_writer->lpVtbl->SetInputMediaType(ctx.sink_writer, ctx.stream_index, mt_in, NULL));
HR(ctx.sink_writer->lpVtbl->BeginWriting(ctx.sink_writer));
HR(ctx.sink_writer->lpVtbl->AddRef(ctx.sink_writer));
}
// video encoding parameters
{
ICodecAPI *codec;
HR(ctx.sink_writer->lpVtbl->GetServiceForStream(ctx.sink_writer, 0, &GUID_NULL, &IID_ICodecAPI, (void*)&codec));
// use a quality VBR
int ratecontrol = use_bitrate ? eAVEncCommonRateControlMode_UnconstrainedVBR : eAVEncCommonRateControlMode_Quality;
VARIANT _ratecontrol = { .vt = VT_UI4, .ulVal = ratecontrol };
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncCommonRateControlMode, &_ratecontrol));
// set the quality
VARIANT _quality = { .vt = VT_UI4, .ulVal = quality };
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncCommonQuality, &_quality));
// even at 100 it is still very quick, really no reason to change it
VARIANT qvs = { .vt = VT_UI4, .ulVal = 100 };
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncCommonQualityVsSpeed, &qvs));
// set the gop size to 2 seconds
VARIANT gop = { .vt = VT_UI4, .ulVal = 2 * ctx.fps };
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncMPVGOPSize, &gop));
// enable 2 b-frames
VARIANT bframes = { .vt = VT_UI4, .ulVal = 2 };
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncMPVDefaultBPictureCount, &bframes));
codec->lpVtbl->Release(codec);
}
return true;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
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