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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 "hook.h"
#include "render.h"
#include "os.h"
#include <combaseapi.h>
#include <mfapi.h>
#include <mfidl.h>
#include <mfreadwrite.h>
#include <codecapi.h>
#include <mftransform.h>
#include <stdlib.h>
#include <string.h>
#include <strmif.h>
#include <winerror.h>
extern struct {
int width;
int height;
const char *game;
int fps;
int quality;
int bitrate;
int qvs;
const char *out;
const char **demo;
int demo_count;
bool combine;
} args;
struct renderctx {
GUID enc_format;
GUID in_fmt;
IMFSinkWriter *sink_writer;
ulong stream_index;
ulong audio_index;
int cur_demo;
};
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;
const int szpx = 3;
static struct { u8 bgr[3]; } *raw = 0;
if (!raw) raw = malloc(args.width * args.height * szpx);
IMFMediaBuffer *imf_buffer = 0;
HR(MFCreateMemoryBuffer(args.width * args.height * szpx, &imf_buffer));
struct { u8 bgr[3]; } *data = 0;
HR(imf_buffer->lpVtbl->Lock(imf_buffer, (u8 **)&data, NULL, NULL));
// THIS IS SLOW!!
this->vt->read_screen_pixels(this, 0, 0, args.width, args.height, raw, IMAGE_FORMAT_BGR888);
for (int y = args.height - 1; y > 0; y--) {
memcpy(data + ((args.height - y) * args.width), raw + y * args.width,
szpx * args.width);
}
HR(imf_buffer->lpVtbl->Unlock(imf_buffer));
HR(imf_buffer->lpVtbl->SetCurrentLength(imf_buffer, args.width * args.height * szpx));
IMFSample *sample = 0;
HR(MFCreateSample(&sample));
HR(sample->lpVtbl->AddBuffer(sample, imf_buffer));
u64 sample_duration = (u64)((1.0 / (double)args.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));
HR(sample->lpVtbl->Release(sample));
HR(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_audio_frame(void) {
// TODO: audio
#define CLIP16(n) (i16)(n < -32768 ? -32768 : (n > 32767 ? 32767 : n))
#undef CLIP16
return true;
}
void (*orig_snd_recordbuffer)(void) = 0;
void hook_snd_recordbuffer(void) {
if (!is_rendering) {
orig_snd_recordbuffer();
return;
}
do_audio_frame();
}
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;
// do we have any more demos to play?
if (args.demo_count--) {
demoplayer->vt->start_playback(demoplayer, *++args.demo, false);
return;
}
if (!do_stop())
die("oopsie!");
exit(0);
}
bool render_init(void) {
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;
// hook the audio frame
orig_snd_recordbuffer = (void (*)(void))
hook_inline((void *)snd_recordbuffer, (void *)hook_snd_recordbuffer);
// 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;", args.fps);
cbuf_addtext(framerate_cmd);
HR(MFStartup(MF_VERSION, 0));
// init sinkwriter
{
IMFMediaType *mt_out = NULL;
IMFMediaType *mt_in = NULL;
u16 path[MAX_PATH] = {0};
mbstowcs(path, args.out, strlen(args.out));
info("rendering to %S", path);
IMFAttributes *sinkwriter_attr;
HR(MFCreateAttributes(&sinkwriter_attr, 1));
HR(sinkwriter_attr->lpVtbl->SetUINT32(sinkwriter_attr, &MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, TRUE));
HR(MFCreateSinkWriterFromURL(path, NULL, sinkwriter_attr, &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, args.bitrate ? args.bitrate : 9999999));
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)args.width << 32) | args.height));
HR(mt_out->lpVtbl->SetUINT64(mt_out, &MF_MT_FRAME_RATE, ((u64)args.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_RGB24));
HR(mt_in->lpVtbl->SetUINT32(mt_in, &MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive));
HR(mt_in->lpVtbl->SetUINT32(mt_in, &MF_MT_ALL_SAMPLES_INDEPENDENT, TRUE));
HR(mt_in->lpVtbl->SetUINT64(mt_in, &MF_MT_FRAME_SIZE, ((u64)args.width << 32) | args.height));
HR(mt_in->lpVtbl->SetUINT64(mt_in, &MF_MT_FRAME_RATE, ((u64)args.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));
}
// video encoding parameters
{
ICodecAPI *codec;
HR(ctx.sink_writer->lpVtbl->GetServiceForStream(ctx.sink_writer, 0, &GUID_NULL, &IID_ICodecAPI, (void*)&codec));
int ratecontrol = !!args.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 = !!args.bitrate ? args.bitrate : args.quality
};
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncCommonQuality, &_quality));
VARIANT _qvs = { .vt = VT_UI4, .ulVal = args.qvs };
HR(codec->lpVtbl->SetValue(codec, &CODECAPI_AVEncCommonQualityVsSpeed, &_qvs));
// set the gop size to 2 seconds
VARIANT gop = { .vt = VT_UI4, .ulVal = 2 * args.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);
}
HR(ctx.sink_writer->lpVtbl->BeginWriting(ctx.sink_writer));
return true;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
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