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ffmpeg_scanimate.cpp
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ffmpeg_scanimate.cpp
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// NTS: This is not like modern "posterize" filters where the pixels are quantizied to N levels then scaled out to 0..255
// That requires a multiply/divide per pixel. Think old-school hardware where such operations were too expensive.
// The "posterize" we emulate here is more the type where you run the video through an ADC, truncate the least significant
// bits, then run back through a DAC on the other side (well within the realm of 1980s/1990s hardware)
#define __STDC_CONSTANT_MACROS
#define __STDC_LIMIT_MACROS
#include <sys/types.h>
#include <signal.h>
#include <stdint.h>
#include <assert.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <math.h>
extern "C" {
#include <libavutil/opt.h>
#include <libavutil/avutil.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
#include <libavutil/samplefmt.h>
#include <libavutil/pixelutils.h>
#include <libavcodec/avcodec.h>
#include <libavcodec/version.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavformat/version.h>
#include <libswscale/swscale.h>
#include <libswscale/version.h>
#include <libswresample/swresample.h>
#include <libswresample/version.h>
}
using namespace std;
#include <map>
#include <string>
#include <vector>
#include <stdexcept>
bool use_422_colorspace = false; // I would default this to true but Adobe Premiere Pro apparently can't handle 4:2:2 H.264 >:(
AVRational output_field_rate = { 60000, 1001 }; // NTSC 60Hz default
int output_width = 720;
int output_height = 480;
bool input_ntsc = false;
bool output_ntsc = true; // NTSC color subcarrier emulation
bool output_pal = false; // PAL color subcarrier emulation
int output_audio_channels = 2; // VHS stereo (set to 1 for mono)
int output_audio_rate = 44100; // VHS Hi-Fi goes up to 20KHz
#define RGBTRIPLET(r,g,b) (((uint32_t)(r) << (uint32_t)16) + ((uint32_t)(g) << (uint32_t)8) + ((uint32_t)(b) << (uint32_t)0))
AVFormatContext* output_avfmt = NULL;
AVStream* output_avstream_audio = NULL; // do not free
AVCodecContext* output_avstream_audio_codec_context = NULL; // do not free
AVStream* output_avstream_video = NULL; // do not free
AVCodecContext* output_avstream_video_codec_context = NULL; // do not free
AVFrame* output_avstream_video_frame = NULL; // ARGB
AVFrame* output_avstream_video_encode_frame = NULL; // 4:2:2 or 4:2:0
struct SwsContext* output_avstream_video_resampler = NULL;
class InputFile {
public:
InputFile() {
input_avfmt = NULL;
audio_dst_data = NULL;
input_avstream_audio = NULL;
input_avstream_audio_frame = NULL;
input_avstream_audio_resampler = NULL;
input_avstream_audio_codec_context = NULL;
input_avstream_video = NULL;
input_avstream_video_frame = NULL;
input_avstream_video_frame_rgb = NULL;
input_avstream_video_resampler = NULL;
input_avstream_video_codec_context = NULL;
next_pts = next_dts = -1LL;
avpkt_valid = false;
eof_stream = false;
eof = false;
}
~InputFile() {
close_input();
}
public:
void reset_on_dup(void) {
path.clear();
}
bool open_input(void) {
if (input_avfmt == NULL) {
if (avformat_open_input(&input_avfmt,path.c_str(),NULL,NULL) < 0) {
fprintf(stderr,"Failed to open input file\n");
close_input();
return false;
}
if (avformat_find_stream_info(input_avfmt,NULL) < 0)
fprintf(stderr,"WARNING: Did not find stream info on input\n");
/* scan streams for one video, one audio */
{
size_t i;
AVStream *is;
int ac=0,vc=0;
AVCodecContext *isctx;
fprintf(stderr,"Input format: %u streams found\n",input_avfmt->nb_streams);
for (i=0;i < (size_t)input_avfmt->nb_streams;i++) {
is = input_avfmt->streams[i];
if (is == NULL) continue;
isctx = is->codec;
if (isctx == NULL) continue;
if (isctx->codec_type == AVMEDIA_TYPE_AUDIO) {
if (input_avstream_audio == NULL && ac == 0) {
if (avcodec_open2(isctx,avcodec_find_decoder(isctx->codec_id),NULL) >= 0) {
input_avstream_audio = is;
input_avstream_audio_codec_context = isctx;
fprintf(stderr,"Found audio stream idx=%zu %u-channel %uHz\n",
i,
input_avstream_audio_codec_context->channels,
input_avstream_audio_codec_context->sample_rate);
}
else {
fprintf(stderr,"Found audio stream but not able to decode\n");
}
}
ac++;
}
else if (isctx->codec_type == AVMEDIA_TYPE_VIDEO) {
if (input_avstream_video == NULL && vc == 0) {
if (avcodec_open2(isctx,avcodec_find_decoder(isctx->codec_id),NULL) >= 0) {
input_avstream_video = is;
input_avstream_video_codec_context = isctx;
fprintf(stderr,"Found video stream idx=%zu\n",i);
}
else {
fprintf(stderr,"Found video stream but not able to decode\n");
}
}
vc++;
}
}
if (input_avstream_video == NULL && input_avstream_audio == NULL) {
fprintf(stderr,"Neither video nor audio found\n");
close_input();
return 1;
}
}
}
/* prepare audio decoding */
if (input_avstream_audio != NULL) {
input_avstream_audio_frame = av_frame_alloc();
if (input_avstream_audio_frame == NULL) {
fprintf(stderr,"Failed to alloc audio frame\n");
close_input();
return 1;
}
}
/* prepare video decoding */
if (input_avstream_video != NULL) {
input_avstream_video_frame = av_frame_alloc();
if (input_avstream_video_frame == NULL) {
fprintf(stderr,"Failed to alloc video frame\n");
close_input();
return 1;
}
/* prepare video encoding */
input_avstream_video_frame_rgb = av_frame_alloc();
if (input_avstream_video_frame_rgb == NULL) {
fprintf(stderr,"Failed to alloc video frame\n");
close_input();
return 1;
}
input_avstream_video_frame_rgb->format = AV_PIX_FMT_BGRA;
if (input_ntsc) {
input_avstream_video_frame_rgb->height = output_pal ? 576 : 480;
input_avstream_video_frame_rgb->width = 480;
}
else {
input_avstream_video_frame_rgb->height = 800;
input_avstream_video_frame_rgb->width = 600;
}
if (av_frame_get_buffer(input_avstream_video_frame_rgb,64) < 0) {
fprintf(stderr,"Failed to alloc render frame\n");
close_input();
return 1;
}
memset(input_avstream_video_frame_rgb->data[0],0,input_avstream_video_frame_rgb->linesize[0]*input_avstream_video_frame_rgb->height);
}
input_avstream_video_resampler_format = AV_PIX_FMT_NONE;
input_avstream_video_resampler_height = -1;
input_avstream_video_resampler_width = -1;
last_written_sample = 0;
audio_dst_data_out_audio_sample = 0;
audio_sample = 0;
audio_dst_data = NULL;
audio_dst_data_alloc_samples = 0;
audio_dst_data_linesize = 0;
audio_dst_data_samples = 0;
audio_dst_data_out_samples = 0;
input_avstream_audio_resampler_channels = -1;
input_avstream_audio_resampler_rate = -1;
eof_stream = false;
got_audio = false;
got_video = false;
adj_time = 0;
t = pt = -1;
eof = false;
avpkt_init();
next_pts = next_dts = -1LL;
return (input_avfmt != NULL);
}
bool next_packet(void) {
if (eof) return false;
if (input_avfmt == NULL) return false;
do {
if (eof_stream) break;
avpkt_release();
avpkt_init();
if (av_read_frame(input_avfmt,&avpkt) < 0) {
eof_stream = true;
return false;
}
if (avpkt.stream_index >= input_avfmt->nb_streams)
continue;
// ugh... this can happen if the source is an AVI file
if (avpkt.pts == AV_NOPTS_VALUE) avpkt.pts = avpkt.dts;
/* track time and keep things monotonic for our code */
if (avpkt.pts != AV_NOPTS_VALUE) {
t = avpkt.pts * av_q2d(input_avfmt->streams[avpkt.stream_index]->time_base);
if (pt < 0)
adj_time = -t;
else if ((t+1.5) < pt) { // time code jumps backwards (1.5 is safe for DVD timecode resets)
adj_time += pt - t;
fprintf(stderr,"Time code jump backwards %.6f->%.6f. adj_time=%.6f\n",pt,t,adj_time);
}
else if (t > (pt+5)) { // time code jumps forwards
adj_time += pt - t;
fprintf(stderr,"Time code jump forwards %.6f->%.6f. adj_time=%.6f\n",pt,t,adj_time);
}
pt = t;
}
if (pt < 0)
continue;
if (avpkt.pts != AV_NOPTS_VALUE) {
avpkt.pts += (adj_time * input_avfmt->streams[avpkt.stream_index]->time_base.den) /
input_avfmt->streams[avpkt.stream_index]->time_base.num;
}
if (avpkt.dts != AV_NOPTS_VALUE) {
avpkt.dts += (adj_time * input_avfmt->streams[avpkt.stream_index]->time_base.den) /
input_avfmt->streams[avpkt.stream_index]->time_base.num;
}
got_audio = false;
got_video = false;
if (input_avstream_audio != NULL && avpkt.stream_index == input_avstream_audio->index) {
if (got_audio) fprintf(stderr,"Audio content lost\n");
av_packet_rescale_ts(&avpkt,input_avstream_audio->time_base,output_avstream_audio->time_base);
handle_audio(/*&*/avpkt);
got_audio = true;
break;
}
else if (input_avstream_video != NULL && avpkt.stream_index == input_avstream_video->index) {
if (got_video) fprintf(stderr,"Video content lost\n");
AVRational m = (AVRational){output_field_rate.den, output_field_rate.num};
av_packet_rescale_ts(&avpkt,input_avstream_video->time_base,m); // convert to FIELD number
handle_frame(/*&*/avpkt); // will set got_video
break;
}
avpkt_release();
} while (1);
if (eof_stream) {
avpkt_release();
avpkt.size = 0;
avpkt.data = NULL;
handle_frame(/*&*/avpkt); // will set got_video
if (!got_video) eof = true;
else fprintf(stderr,"Got latent frame\n");
}
return true;
}
void handle_audio(AVPacket &pkt) {
int got_frame = 0;
if (avcodec_decode_audio4(input_avstream_audio_codec_context,input_avstream_audio_frame,&got_frame,&pkt) >= 0) {
if (got_frame != 0 && input_avstream_audio_frame->nb_samples != 0) {
if (input_avstream_audio_frame->pts == AV_NOPTS_VALUE)
input_avstream_audio_frame->pts = pkt.pts;
if (input_avstream_audio_resampler != NULL) {
if (input_avstream_audio_resampler_rate != input_avstream_audio_codec_context->sample_rate ||
input_avstream_audio_resampler_channels != input_avstream_audio_codec_context->channels) {
fprintf(stderr,"Audio format changed\n");
swr_free(&input_avstream_audio_resampler);
}
}
if (input_avstream_audio_resampler == NULL) {
input_avstream_audio_resampler = swr_alloc();
av_opt_set_int(input_avstream_audio_resampler, "in_channel_count", input_avstream_audio_codec_context->channels, 0); // FIXME: FFMPEG should document this!!
av_opt_set_int(input_avstream_audio_resampler, "out_channel_count", output_avstream_audio_codec_context->channels, 0); // FIXME: FFMPEG should document this!!
av_opt_set_int(input_avstream_audio_resampler, "in_channel_layout", input_avstream_audio_codec_context->channel_layout, 0);
av_opt_set_int(input_avstream_audio_resampler, "out_channel_layout", output_avstream_audio_codec_context->channel_layout, 0);
av_opt_set_int(input_avstream_audio_resampler, "in_sample_rate", input_avstream_audio_codec_context->sample_rate, 0);
av_opt_set_int(input_avstream_audio_resampler, "out_sample_rate", output_avstream_audio_codec_context->sample_rate, 0);
av_opt_set_sample_fmt(input_avstream_audio_resampler, "in_sample_fmt", input_avstream_audio_codec_context->sample_fmt, 0);
av_opt_set_sample_fmt(input_avstream_audio_resampler, "out_sample_fmt", output_avstream_audio_codec_context->sample_fmt, 0);
if (swr_init(input_avstream_audio_resampler) < 0) {
fprintf(stderr,"Failed to init audio resampler\n");
swr_free(&input_avstream_audio_resampler);
return;
}
input_avstream_audio_resampler_rate = input_avstream_audio_codec_context->sample_rate;
input_avstream_audio_resampler_channels = input_avstream_audio_codec_context->channels;
if (audio_dst_data != NULL) {
av_freep(&audio_dst_data[0]); // NTS: Why??
av_freep(&audio_dst_data);
}
audio_dst_data_alloc_samples = 0;
fprintf(stderr,"Audio resampler init %uHz -> %uHz\n",
input_avstream_audio_codec_context->sample_rate,
output_avstream_audio_codec_context->sample_rate);
}
audio_dst_data_samples = av_rescale_rnd(
swr_get_delay(input_avstream_audio_resampler, input_avstream_audio_frame->sample_rate) + input_avstream_audio_frame->nb_samples,
output_avstream_audio_codec_context->sample_rate, input_avstream_audio_frame->sample_rate, AV_ROUND_UP);
if (audio_dst_data == NULL || audio_dst_data_samples > audio_dst_data_alloc_samples) {
if (audio_dst_data != NULL) {
av_freep(&audio_dst_data[0]); // NTS: Why??
av_freep(&audio_dst_data);
}
audio_dst_data_alloc_samples = 0;
fprintf(stderr,"Allocating audio buffer %u samples\n",(unsigned int)audio_dst_data_samples);
if (av_samples_alloc_array_and_samples(&audio_dst_data,&audio_dst_data_linesize,
output_avstream_audio_codec_context->channels,audio_dst_data_samples,
output_avstream_audio_codec_context->sample_fmt, 0) >= 0) {
audio_dst_data_alloc_samples = audio_dst_data_samples;
}
else {
fprintf(stderr,"Failure to allocate audio buffer\n");
audio_dst_data_alloc_samples = 0;
}
}
if (audio_dst_data != NULL) {
if ((audio_dst_data_out_samples=swr_convert(input_avstream_audio_resampler,audio_dst_data,audio_dst_data_samples,
(const uint8_t**)input_avstream_audio_frame->data,input_avstream_audio_frame->nb_samples)) > 0) {
}
else if (audio_dst_data_out_samples < 0) {
fprintf(stderr,"Failed to resample audio\n");
}
audio_dst_data_out_audio_sample = audio_sample;
audio_sample += audio_dst_data_out_samples;
}
}
}
}
void frame_copy_scale(void) {
if (input_avstream_video_frame_rgb == NULL) {
fprintf(stderr,"New input frame\n");
input_avstream_video_frame_rgb = av_frame_alloc();
if (input_avstream_video_frame_rgb == NULL) {
fprintf(stderr,"Failed to alloc video frame\n");
return;
}
input_avstream_video_frame_rgb->format = AV_PIX_FMT_BGRA;
input_avstream_video_frame_rgb->height = output_height;
input_avstream_video_frame_rgb->width = output_width;
if (av_frame_get_buffer(input_avstream_video_frame_rgb,64) < 0) {
fprintf(stderr,"Failed to alloc render frame\n");
return;
}
memset(input_avstream_video_frame_rgb->data[0],0,input_avstream_video_frame_rgb->linesize[0]*input_avstream_video_frame_rgb->height);
}
if (input_avstream_video_resampler != NULL) { // pixel format change or width/height change = free resampler and reinit
if (input_avstream_video_resampler_format != input_avstream_video_frame->format ||
input_avstream_video_resampler_width != input_avstream_video_frame->width ||
input_avstream_video_resampler_height != input_avstream_video_frame->height) {
sws_freeContext(input_avstream_video_resampler);
input_avstream_video_resampler = NULL;
}
}
if (input_avstream_video_resampler == NULL) {
input_avstream_video_resampler = sws_getContext(
// source
input_avstream_video_frame->width,
input_avstream_video_frame->height,
(AVPixelFormat)input_avstream_video_frame->format,
// dest
input_avstream_video_frame_rgb->width,
input_avstream_video_frame_rgb->height,
(AVPixelFormat)input_avstream_video_frame_rgb->format,
// opt
SWS_BILINEAR, NULL, NULL, NULL);
if (input_avstream_video_resampler != NULL) {
fprintf(stderr,"sws_getContext new context\n");
input_avstream_video_resampler_format = (AVPixelFormat)input_avstream_video_frame->format;
input_avstream_video_resampler_width = input_avstream_video_frame->width;
input_avstream_video_resampler_height = input_avstream_video_frame->height;
}
else {
fprintf(stderr,"sws_getContext fail\n");
}
}
if (input_avstream_video_resampler != NULL) {
input_avstream_video_frame_rgb->pts = input_avstream_video_frame->pts;
input_avstream_video_frame_rgb->pkt_pts = input_avstream_video_frame->pkt_pts;
input_avstream_video_frame_rgb->pkt_dts = input_avstream_video_frame->pkt_dts;
input_avstream_video_frame_rgb->top_field_first = input_avstream_video_frame->top_field_first;
input_avstream_video_frame_rgb->interlaced_frame = input_avstream_video_frame->interlaced_frame;
if (sws_scale(input_avstream_video_resampler,
// source
input_avstream_video_frame->data,
input_avstream_video_frame->linesize,
0,input_avstream_video_frame->height,
// dest
input_avstream_video_frame_rgb->data,
input_avstream_video_frame_rgb->linesize) <= 0)
fprintf(stderr,"WARNING: sws_scale failed\n");
}
}
void handle_frame(AVPacket &pkt) {
int got_frame = 0;
if (avcodec_decode_video2(input_avstream_video_codec_context,input_avstream_video_frame,&got_frame,&pkt) >= 0) {
if (got_frame != 0 && input_avstream_video_frame->width > 0 && input_avstream_video_frame->height > 0) {
got_video = true;
}
}
else {
fprintf(stderr,"No video decoded\n");
}
}
void avpkt_init(void) {
if (!avpkt_valid) {
avpkt_valid = true;
av_init_packet(&avpkt);
}
}
void avpkt_release(void) {
if (avpkt_valid) {
avpkt_valid = false;
av_packet_unref(&avpkt);
}
got_audio = false;
got_video = false;
}
void close_input(void) {
eof = true;
avpkt_release();
if (input_avstream_audio_codec_context != NULL) {
avcodec_close(input_avstream_audio_codec_context);
input_avstream_audio_codec_context = NULL;
input_avstream_audio = NULL;
}
if (input_avstream_video_codec_context != NULL) {
avcodec_close(input_avstream_video_codec_context);
input_avstream_video_codec_context = NULL;
input_avstream_video = NULL;
}
if (input_avstream_audio_frame != NULL)
av_frame_free(&input_avstream_audio_frame);
if (input_avstream_video_frame != NULL)
av_frame_free(&input_avstream_video_frame);
if (input_avstream_video_frame_rgb != NULL)
av_frame_free(&input_avstream_video_frame_rgb);
if (input_avstream_audio_resampler != NULL)
swr_free(&input_avstream_audio_resampler);
if (input_avstream_video_resampler != NULL) {
sws_freeContext(input_avstream_video_resampler);
input_avstream_video_resampler = NULL;
}
if (audio_dst_data != NULL) {
av_freep(&audio_dst_data[0]); // NTS: Why??
av_freep(&audio_dst_data);
}
input_avstream_audio_resampler_channels = -1;
input_avstream_audio_resampler_rate = -1;
avformat_close_input(&input_avfmt);
}
public:
std::string path;
uint32_t color;
bool eof;
bool eof_stream;
bool got_audio;
bool got_video;
public:
unsigned long long last_written_sample;
unsigned long long audio_sample;
uint8_t** audio_dst_data;
int audio_dst_data_alloc_samples;
int audio_dst_data_linesize;
int audio_dst_data_samples;
int audio_dst_data_out_samples;
unsigned long long audio_dst_data_out_audio_sample;
int input_avstream_audio_resampler_rate;
int input_avstream_audio_resampler_channels;
AVFormatContext* input_avfmt;
AVStream* input_avstream_audio; // do not free
AVCodecContext* input_avstream_audio_codec_context; // do not free
AVFrame* input_avstream_audio_frame;
AVStream* input_avstream_video; // do not free
AVCodecContext* input_avstream_video_codec_context; // do not free
AVFrame* input_avstream_video_frame;
AVFrame* input_avstream_video_frame_rgb;
struct SwrContext* input_avstream_audio_resampler;
struct SwsContext* input_avstream_video_resampler;
AVPixelFormat input_avstream_video_resampler_format;
int input_avstream_video_resampler_height;
int input_avstream_video_resampler_width;
signed long long next_pts;
signed long long next_dts;
AVPacket avpkt;
bool avpkt_valid;
double adj_time;
double t,pt;
};
std::vector<InputFile> input_files;
std::string output_file;
InputFile ¤t_input_file(void) {
if (input_files.empty()) {
std::string what = "input files empty";
throw std::out_of_range(/*&*/what);
}
return *(input_files.rbegin()); /* last one */
}
InputFile &new_input_file(void) {
if (!input_files.empty()) {
/* copy the last one, except for some fields */
{
InputFile &last = current_input_file();
input_files.push_back(last);
}
{
InputFile &last = current_input_file();
last.reset_on_dup();
}
}
else {
/* make a new one with defaults */
input_files.push_back(InputFile());
}
return current_input_file();
}
volatile int DIE = 0;
void sigma(int x) {
if (++DIE >= 20) abort();
}
void preset_PAL() {
output_field_rate.num = 50;
output_field_rate.den = 1;
output_height = 576;
output_width = 720;
output_pal = true;
output_ntsc = false;
}
void preset_NTSC() {
output_field_rate.num = 60000;
output_field_rate.den = 1001;
output_height = 480;
output_width = 720;
output_pal = false;
output_ntsc = true;
}
void preset_720p60() {
output_field_rate.num = 60000;
output_field_rate.den = 1001;
output_height = 720;
output_width = 1280;
output_pal = false;
output_ntsc = true;
}
void preset_1080p60() {
output_field_rate.num = 60000;
output_field_rate.den = 1001;
output_height = 1080;
output_width = 1920;
output_pal = false;
output_ntsc = true;
}
static void help(const char *arg0) {
fprintf(stderr,"%s [options]\n",arg0);
fprintf(stderr," -i <input file> you can specify more than one input file, in order of layering\n");
fprintf(stderr," -o <output file>\n");
}
static int parse_argv(int argc,char **argv) {
const char *a;
int i;
for (i=1;i < argc;) {
a = argv[i++];
if (*a == '-') {
do { a++; } while (*a == '-');
if (!strcmp(a,"h") || !strcmp(a,"help")) {
help(argv[0]);
return 1;
}
else if (!strcmp(a,"width")) {
a = argv[i++];
if (a == NULL) return 1;
output_width = (int)strtoul(a,NULL,0);
if (output_width < 32) return 1;
}
else if (!strcmp(a,"i")) {
a = argv[i++];
if (a == NULL) return 1;
new_input_file().path = a;
}
else if (!strcmp(a,"o")) {
a = argv[i++];
if (a == NULL) return 1;
output_file = a;
}
else if (!strcmp(a,"422")) {
use_422_colorspace = true;
}
else if (!strcmp(a,"420")) {
use_422_colorspace = false;
}
else if (!strcmp(a,"inntsc")) {
input_ntsc = true;
}
else if (!strcmp(a,"tvstd")) {
a = argv[i++];
if (!strcmp(a,"pal")) {
preset_PAL();
}
else if (!strcmp(a,"ntsc")) {
preset_NTSC();
}
else if (!strcmp(a,"720p60")) {
preset_720p60();
}
else if (!strcmp(a,"1080p60")) {
preset_1080p60();
}
else {
fprintf(stderr,"Unknown tv std '%s'\n",a);
return 1;
}
}
else {
fprintf(stderr,"Unknown switch '%s'\n",a);
return 1;
}
}
else {
fprintf(stderr,"Unhandled arg '%s'\n",a);
return 1;
}
}
if (output_file.empty()) {
fprintf(stderr,"No output file specified\n");
return 1;
}
if (input_files.empty()) {
fprintf(stderr,"No input files specified\n");
return 1;
}
return 0;
}
void process_audio(InputFile &fin) {
if (fin.audio_dst_data == NULL || fin.audio_dst_data_out_samples == 0)
return;
// we don't do anything with audio in this filter
}
void write_out_audio(InputFile &fin) {
if (fin.audio_dst_data == NULL || fin.audio_dst_data_out_samples == 0)
return;
/* pad-fill */
while (fin.last_written_sample < fin.audio_dst_data_out_audio_sample) {
unsigned long long out_samples = fin.audio_dst_data_out_audio_sample - fin.last_written_sample;
if (out_samples > output_audio_rate)
out_samples = output_audio_rate;
AVPacket dstpkt;
av_init_packet(&dstpkt);
if (av_new_packet(&dstpkt,out_samples * 2 * output_audio_channels) >= 0) { // NTS: Will reset fields too!
assert(dstpkt.data != NULL);
assert(dstpkt.size >= (out_samples * 2 * output_audio_channels));
memset(dstpkt.data,0,out_samples * 2 * output_audio_channels);
}
dstpkt.pts = fin.last_written_sample;
dstpkt.dts = fin.last_written_sample;
dstpkt.stream_index = output_avstream_audio->index;
av_packet_rescale_ts(&dstpkt,output_avstream_audio_codec_context->time_base,output_avstream_audio->time_base);
if (av_interleaved_write_frame(output_avfmt,&dstpkt) < 0)
fprintf(stderr,"Failed to write frame\n");
av_packet_unref(&dstpkt);
fprintf(stderr,"Pad fill %llu samples\n",out_samples);
fin.last_written_sample += out_samples;
}
// write it out. TODO: At some point, support conversion to whatever the codec needs and then convert to it.
// that way we can render directly to MP4 our VHS emulation.
AVPacket dstpkt;
av_init_packet(&dstpkt);
if (av_new_packet(&dstpkt,fin.audio_dst_data_out_samples * 2 * output_audio_channels) >= 0) { // NTS: Will reset fields too!
assert(dstpkt.data != NULL);
assert(dstpkt.size >= (fin.audio_dst_data_out_samples * 2 * output_audio_channels));
memcpy(dstpkt.data,fin.audio_dst_data[0],fin.audio_dst_data_out_samples * 2 * output_audio_channels);
}
dstpkt.pts = fin.audio_dst_data_out_audio_sample;
dstpkt.dts = fin.audio_dst_data_out_audio_sample;
dstpkt.stream_index = output_avstream_audio->index;
av_packet_rescale_ts(&dstpkt,output_avstream_audio_codec_context->time_base,output_avstream_audio->time_base);
if (av_interleaved_write_frame(output_avfmt,&dstpkt) < 0)
fprintf(stderr,"Failed to write frame\n");
av_packet_unref(&dstpkt);
fin.audio_sample = fin.last_written_sample = fin.audio_dst_data_out_audio_sample + fin.audio_dst_data_out_samples;
}
void output_frame(AVFrame *frame,unsigned long long field_number) {
int gotit = 0;
AVPacket pkt;
av_init_packet(&pkt);
if (av_new_packet(&pkt,50000000/8) < 0) {
fprintf(stderr,"Failed to alloc vid packet\n");
return;
}
frame->key_frame = (field_number % (15ULL * 2ULL)) == 0 ? 1 : 0;
{
frame->interlaced_frame = 0;
frame->pts = field_number;
pkt.pts = field_number;
pkt.dts = field_number;
}
fprintf(stderr,"\x0D" "Output field %llu ",field_number); fflush(stderr);
if (avcodec_encode_video2(output_avstream_video_codec_context,&pkt,frame,&gotit) == 0) {
if (gotit) {
pkt.stream_index = output_avstream_video->index;
av_packet_rescale_ts(&pkt,output_avstream_video_codec_context->time_base,output_avstream_video->time_base);
if (av_interleaved_write_frame(output_avfmt,&pkt) < 0)
fprintf(stderr,"AV write frame failed video\n");
}
}
av_packet_unref(&pkt);
}
const unsigned int PRECISION = 1;
void phosphor_dot(uint32_t *rasteremu,AVFrame *dstframe,double x,double y,double signal,double dot_radius) {
int ix,iy,xmin,xmax,ymax;
double dx,dy,fv;
uint32_t v;
if (signal < 0) signal = 0;
else if (signal > 32) signal = 32;
if (signal == 0) return;
// translate -1...1 x and y coordinates to screen
x += 1.0;
y += 1.0;
x = (x * dstframe->width) / 2;
y = (y * dstframe->height) / 2;
// phosphor dot brightness and radius
signal /= dot_radius;
// render it as a blob
iy = (int)floor(y - dot_radius);
ymax = (int)floor(y + dot_radius);
xmin = (int)floor(x - dot_radius);
xmax = (int)ceil(x + dot_radius);
while (iy <= ymax) {
for (ix = xmin;ix <= xmax;ix++) {
if (ix >= 0 && ix < dstframe->width && iy >= 0 && iy < dstframe->height) {
dx = ix - x;
dy = iy - y;
fv = signal * ((dot_radius - sqrt((dx*dx)+(dy*dy))) / dot_radius);
if (fv <= 0) continue;
v = (uint32_t)(fv * 255);
rasteremu[(iy*dstframe->width)+ix] += v;
}
}
iy++;
}
}
unsigned long long pixelstep = 0;
// this is the magic function that you modify per rendering job to do your raster-warping magic
void scanimate_modify_raster(double &sx,double &sy,double &dot_radius,double &signal,const unsigned int field,const unsigned long long fieldno,const double frame_t) {
// modify here
unsigned int ef_field;
unsigned int effect;
double ef_t;
effect = (fieldno / (60 * 3));
ef_field = fieldno - (effect * (60 * 3));
effect %= 4;
switch (effect) {
case 3: // sin wave "diffuse"
ef_t = sin(((double)ef_field * M_PI * 2) / (59.94 * 1));
sx += sin(frame_t * M_PI * 2 * 6) * ef_t * 0.1;
sy += cos(frame_t * M_PI * 2 * 6) * ef_t * 0.1;
break;
case 1: // vertical "rotate"
ef_t = (double)ef_field / (60 * 3);
sy *= (1.0 - (ef_t * 2.0));
signal *= fabs(1.0 - (ef_t * 2.0));
break;
case 2: // vertical stretch out
ef_t = (double)ef_field / (60 * 3);
sy *= (1.0 + (ef_t * 12));
break;
case 0: // trapezoid effect
ef_t = (double)ef_field / (60 * 3);
sx *= ((((sy + 1.0) / 2.0) * (1.0 - ef_t)) + ef_t);
signal *= ((((sy + 1.0) / 2.0) * (1.0 - ef_t)) + ef_t);
break;
}
// end modify here
}
// This code assumes ARGB and the frame match resolution/
void composite_layer(AVFrame *dstframe,AVFrame *srcframe,InputFile &inputfile,unsigned int field,unsigned long long fieldno) {
uint32_t *rasteremu; // high precision grayscale
double sx,sy,tx,ty;
unsigned int dx,dy;
unsigned int ystep;
double dot_radius;
unsigned int x,y;
double sigscalxy;
double frame_t;
uint32_t rgba;
double signal;
double t;
if (dstframe == NULL || srcframe == NULL) return;
if (dstframe->data[0] == NULL || srcframe->data[0] == 0) return;
if (dstframe->linesize[0] < (dstframe->width*4)) return; // ARGB
if (srcframe->linesize[0] < (srcframe->width*4)) return; // ARGB
rasteremu = new uint32_t[dstframe->width * dstframe->height];
memset(rasteremu,0,sizeof(uint32_t)*dstframe->width*dstframe->height);
if (input_ntsc) {
// source is NTSC
ystep = 2;
y = field;
}
else {
// source is "monochrome camera with about 800 lines"
ystep = 1;
y = 0;
}
// sx and sy are source raster position
// tx and ty are where the raster actually ends up
sigscalxy = ((double)dstframe->width / srcframe->width) * ((double)dstframe->height / srcframe->height) * 0.9;
for (;y < srcframe->height;y += ystep) {
for (x=0;x < (srcframe->width<<PRECISION);x++) {
sx = (((double)x * 2) / (srcframe->width<<PRECISION)) - 1.0;
sy = (((double)y * 2) / srcframe->height) - 1.0;
if (input_ntsc) {
// ntsc
dot_radius = ((double)dstframe->height * 2.05) / srcframe->height;
}
else {
// monochrome camera
dot_radius = ((double)dstframe->height * 1.05) / srcframe->height;
}
// slight "slant" because of CRT raster
sy += (((double)x * ystep) / (srcframe->width<<PRECISION)) / srcframe->height;
rgba = ((uint32_t*)(srcframe->data[0] + (srcframe->linesize[0] * y)))[x>>PRECISION];
signal = ((double)((rgba >> 8U) & 0xFF)) / 255; // use green part
frame_t = ((double)((y * srcframe->width * (1<<PRECISION)) + x)) / (srcframe->width * srcframe->height * (1<<PRECISION));
// process
scanimate_modify_raster(sx,sy,dot_radius,signal,field,fieldno,frame_t);
if (dot_radius < 1.2) dot_radius = 1.2;
signal *= sigscalxy;
// final
phosphor_dot(rasteremu,dstframe,sx,sy,signal,dot_radius);
// count
pixelstep++;
}
}
// copy raster emu to screen
for (y=field;y < dstframe->height;y++) {
for (x=0;x < dstframe->width;x++) {
rgba = rasteremu[(y*dstframe->width)+x] >> PRECISION;
if (rgba > 255) rgba = 255;
((uint32_t*)(dstframe->data[0] + (dstframe->linesize[0] * y)))[x] = 0xFF000000UL + (rgba * 0x010101UL);
}
}
delete[] rasteremu;
}
int main(int argc,char **argv) {
preset_NTSC();
if (parse_argv(argc,argv))
return 1;
av_register_all();
avformat_network_init();
avcodec_register_all();
/* open all input files */
for (std::vector<InputFile>::iterator i=input_files.begin();i!=input_files.end();i++) {
if (!(*i).open_input()) {
fprintf(stderr,"Failed to open %s\n",(*i).path.c_str());
return 1;
}
}
/* open output file */
assert(output_avfmt == NULL);
if (avformat_alloc_output_context2(&output_avfmt,NULL,NULL,output_file.c_str()) < 0) {
fprintf(stderr,"Failed to open output file\n");
return 1;
}
{